### Bug Summary

File: | builds/wireshark/wireshark/epan/dissectors/packet-http.c
Warning: | line 2741, column 2 Value stored to 'line' is never read

### Annotated Source Code

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clang -cc1 -cc1 -triple x86_64-pc-linux-gnu -analyze -disable-free -clear-ast-before-backend -disable-llvm-verifier -discard-value-names -main-file-name packet-http.c -analyzer-checker=core -analyzer-checker=apiModeling -analyzer-checker=unix -analyzer-checker=deadcode -analyzer-checker=security.insecureAPI.UncheckedReturn -analyzer-checker=security.insecureAPI.getpw -analyzer-checker=security.insecureAPI.gets -analyzer-checker=security.insecureAPI.mktemp -analyzer-checker=security.insecureAPI.mkstemp -analyzer-checker=security.insecureAPI.vfork -analyzer-checker=nullability.NullPassedToNonnull -analyzer-checker=nullability.NullReturnedFromNonnull -analyzer-output plist -w -setup-static-analyzer -mrelocation-model pic -pic-level 2 -fhalf-no-semantic-interposition -fno-delete-null-pointer-checks -mframe-pointer=all -relaxed-aliasing -fmath-errno -ffp-contract=on -fno-rounding-math -ffloat16-excess-precision=fast -fbfloat16-excess-precision=fast -mconstructor-aliases -funwind-tables=2 -target-cpu x86-64 -tune-cpu generic -debugger-tuning=gdb -fdebug-compilation-dir=/builds/wireshark/wireshark/build -fcoverage-compilation-dir=/builds/wireshark/wireshark/build -resource-dir /usr/lib/llvm-21/lib/clang/21 -isystem /usr/include/glib-2.0 -isystem /usr/lib/x86_64-linux-gnu/glib-2.0/include -isystem /builds/wireshark/wireshark/epan/dissectors -isystem /builds/wireshark/wireshark/build/epan/dissectors -isystem /usr/include/mit-krb5 -isystem /usr/include/libxml2 -isystem /builds/wireshark/wireshark/epan -D G_DISABLE_DEPRECATED -D G_DISABLE_SINGLE_INCLUDES -D WS_BUILD_DLL -D WS_DEBUG -D WS_DEBUG_UTF_8 -I /builds/wireshark/wireshark/build -I /builds/wireshark/wireshark -I /builds/wireshark/wireshark/include -D _GLIBCXX_ASSERTIONS -internal-isystem /usr/lib/llvm-21/lib/clang/21/include -internal-isystem /usr/local/include -internal-isystem /usr/lib/gcc/x86_64-linux-gnu/14/../../../../x86_64-linux-gnu/include -internal-externc-isystem /usr/include/x86_64-linux-gnu -internal-externc-isystem /include -internal-externc-isystem /usr/include -fmacro-prefix-map=/builds/wireshark/wireshark/= -fmacro-prefix-map=/builds/wireshark/wireshark/build/= -fmacro-prefix-map=../= -Wno-format-nonliteral -std=gnu11 -ferror-limit 19 -fvisibility=hidden -fwrapv -fwrapv-pointer -fstrict-flex-arrays=3 -stack-protector 2 -fstack-clash-protection -fcf-protection=full -fgnuc-version=4.2.1 -fskip-odr-check-in-gmf -fexceptions -fcolor-diagnostics -analyzer-output=html -faddrsig -D__GCC_HAVE_DWARF2_CFI_ASM=1 -o /builds/wireshark/wireshark/sbout/2026-04-23-100342-3640-1 -x c /builds/wireshark/wireshark/epan/dissectors/packet-http.c

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1 | /* packet-http.c
2 | * Routines for HTTP packet disassembly
3 | * RFC 1945 (HTTP/1.0)
4 | * RFC 2616 (HTTP/1.1)
5 | *
6 | * Guy Harris <guy@alum.mit.edu>
7 | *
8 | * Copyright 2017, Eugene Adell <eugene.adell@gmail.com>
9 | * Copyright 2004, Jerry Talkington <jtalkington@users.sourceforge.net>
10 | * Copyright 2002, Tim Potter <tpot@samba.org>
11 | * Copyright 1999, Andrew Tridgell <tridge@samba.org>
12 | *
13 | * Wireshark - Network traffic analyzer
14 | * By Gerald Combs <gerald@wireshark.org>
15 | * Copyright 1998 Gerald Combs
16 | *
17 | * SPDX-License-Identifier: GPL-2.0-or-later
18 | */
19 |
20 | #include "config.h"
21 |
22 | #include <errno(*__errno_location ()).h>
23 |
24 | #include <epan/packet.h>
25 | #include <epan/prefs.h>
26 | #include <epan/expert.h>
27 | #include <epan/follow.h>
28 | #include <epan/addr_resolv.h>
29 | #include <epan/uat.h>
30 | #include <epan/charsets.h>
31 | #include <epan/strutil.h>
32 | #include <epan/stats_tree.h>
33 | #include <epan/to_str.h>
34 | #include <epan/req_resp_hdrs.h>
35 | #include <epan/proto_data.h>
36 | #include <epan/export_object.h>
37 | #include <epan/exceptions.h>
38 | #include <epan/show_exception.h>
39 | #include <epan/unit_strings.h>
40 | #include <glib.h>
41 | #include "packet-http.h"
42 | #include "packet-http2.h"
43 | #include "packet-tcp.h"
44 | #include "packet-tls.h"
45 | #include "packet-acdr.h"
46 | #include "packet-media-type.h"
47 |
48 | #include <ui/tap-credentials.h>
49 |
50 | void proto_register_http(void);
51 | void proto_reg_handoff_http(void);
52 | void proto_register_message_http(void);
53 | void proto_reg_handoff_message_http(void);
54 |
55 | static int http_tap;
56 | static int http_eo_tap;
57 | static int http_follow_tap;
58 | static int credentials_tap;
59 |
60 | static int proto_http;
61 | static int proto_http2;
62 | static int proto_ssdp;
63 | static int hf_http_notification;
64 | static int hf_http_response;
65 | static int hf_http_request;
66 | static int hf_http_response_line;
67 | static int hf_http_request_line;
68 | static int hf_http_basic;
69 | static int hf_http_citrix;
70 | static int hf_http_citrix_user;
71 | static int hf_http_citrix_domain;
72 | static int hf_http_citrix_passwd;
73 | static int hf_http_citrix_session;
74 | static int hf_http_request_method;
75 | static int hf_http_request_uri;
76 | static int hf_http_request_full_uri;
77 | static int hf_http_request_path;
78 | static int hf_http_request_path_segment;
79 | static int hf_http_request_query;
80 | static int hf_http_request_query_parameter;
81 | static int hf_http_request_version;
82 | static int hf_http_response_version;
83 | static int hf_http_response_code;
84 | static int hf_http_response_code_desc;
85 | static int hf_http_response_phrase;
86 | static int hf_http_authorization;
87 | static int hf_http_proxy_authenticate;
88 | static int hf_http_proxy_authorization;
89 | static int hf_http_proxy_connect_host;
90 | static int hf_http_proxy_connect_port;
91 | static int hf_http_www_authenticate;
92 | static int hf_http_content_type;
93 | static int hf_http_content_length_header;
94 | static int hf_http_content_length;
95 | static int hf_http_content_encoding;
96 | static int hf_http_transfer_encoding;
97 | static int hf_http_upgrade;
98 | static int hf_http_user_agent;
99 | static int hf_http_host;
100 | static int hf_http_range;
101 | static int hf_http_content_range;
102 | static int hf_http_connection;
103 | static int hf_http_cookie;
104 | static int hf_http_cookie_pair;
105 | static int hf_http_accept;
106 | static int hf_http_referer;
107 | static int hf_http_accept_language;
108 | static int hf_http_accept_encoding;
109 | static int hf_http_date;
110 | static int hf_http_cache_control;
111 | static int hf_http_server;
112 | static int hf_http_location;
113 | static int hf_http_sec_websocket_accept;
114 | static int hf_http_sec_websocket_extensions;
115 | static int hf_http_sec_websocket_key;
116 | static int hf_http_sec_websocket_protocol;
117 | static int hf_http_sec_websocket_version;
118 | static int hf_http_set_cookie;
119 | static int hf_http_last_modified;
120 | static int hf_http_x_forwarded_for;
121 | static int hf_http_http2_settings;
122 | static int hf_http_request_in;
123 | static int hf_http_response_in;
124 | /*static int hf_http_next_request_in;
125 | static int hf_http_next_response_in;
126 | static int hf_http_prev_request_in;
127 | static int hf_http_prev_response_in; */
128 | static int hf_http_time;
129 | static int hf_http_chunk_size;
130 | static int hf_http_chunk_data;
131 | static int hf_http_chunk_boundary;
132 | static int hf_http_chunked_trailer_part;
133 | static int hf_http_file_data;
134 | static int hf_http_unknown_header;
135 | static int hf_http_http2_settings_uri;
136 |
137 | static int ett_http;
138 | static int ett_http_ntlmssp;
139 | static int ett_http_kerberos;
140 | static int ett_http_request;
141 | static int ett_http_request_uri;
142 | static int ett_http_request_path;
143 | static int ett_http_request_query;
144 | static int ett_http_chunked_response;
145 | static int ett_http_chunk_data;
146 | static int ett_http_encoded_entity;
147 | static int ett_http_header_item;
148 | static int ett_http_http2_settings_item;
149 |
150 | static expert_field ei_http_te_and_length;
151 | static expert_field ei_http_te_unknown;
152 | static expert_field ei_http_subdissector_failed;
153 | static expert_field ei_http_tls_port;
154 | static expert_field ei_http_leading_crlf;
155 | static expert_field ei_http_excess_data;
156 | static expert_field ei_http_bad_header_name;
157 | static expert_field ei_http_decompression_failed;
158 | static expert_field ei_http_decompression_disabled;
159 | static expert_field ei_http_response_code_invalid;
160 | static expert_field ei_http_request_uri_invalid;
161 |
162 | static dissector_handle_t http_handle;
163 | static dissector_handle_t http_tcp_handle;
164 | static dissector_handle_t http_tls_handle;
165 | static dissector_handle_t http_sctp_handle;
166 |
167 | static dissector_handle_t media_handle;
168 | static dissector_handle_t http2_handle;
169 | static dissector_handle_t sstp_handle;
170 | static dissector_handle_t ntlmssp_handle;
171 | static dissector_handle_t gssapi_handle;
172 |
173 | /* RFC 3986 Ch 2.2 Reserved characters*/
174 | /* patterns used for tvb_ws_mempbrk_pattern_uint8 */
175 | static ws_mempbrk_pattern pbrk_gen_delims;
176 | static ws_mempbrk_pattern pbrk_sub_delims;
177 |
178 | /* reassembly table for streaming chunk mode */
179 | static reassembly_table http_streaming_reassembly_table;
180 |
181 | REASSEMBLE_ITEMS_DEFINE(http_body, "HTTP Chunked Body")static int ett_http_body_fragment; static int ett_http_body_fragments ; static int hf_http_body_fragments; static int hf_http_body_fragment ; static int hf_http_body_fragment_overlap; static int hf_http_body_fragment_overlap_conflicts ; static int hf_http_body_fragment_multiple_tails; static int hf_http_body_fragment_too_long_fragment; static int hf_http_body_fragment_error ; static int hf_http_body_fragment_count; static int hf_http_body_reassembled_in ; static int hf_http_body_reassembled_length; static int hf_http_body_reassembled_data ; static int hf_http_body_segment; static const fragment_items http_body_fragment_items = { &ett_http_body_fragment, & ett_http_body_fragments, &hf_http_body_fragments, &hf_http_body_fragment , &hf_http_body_fragment_overlap, &hf_http_body_fragment_overlap_conflicts , &hf_http_body_fragment_multiple_tails, &hf_http_body_fragment_too_long_fragment , &hf_http_body_fragment_error, &hf_http_body_fragment_count , &hf_http_body_reassembled_in, &hf_http_body_reassembled_length , &hf_http_body_reassembled_data, "HTTP Chunked Body" " fragments" };
182 |
183 | /* HTTP chunk virtual frame number (similar to HTTP2 frame num) */
184 | #define get_http_chunk_frame_numget_virtual_frame_num64 get_virtual_frame_num64
185 |
186 | /* Stuff for generation/handling of fields for custom HTTP headers */
187 | typedef struct _header_field_t {
188 | char* header_name;
189 | char* header_desc;
190 | } header_field_t;
191 |
192 | static header_field_t* header_fields;
193 | static unsigned num_header_fields;
194 |
195 | static GHashTable* header_fields_hash;
196 | static hf_register_info* dynamic_hf;
197 | static unsigned dynamic_hf_size;
198 |
199 | static bool_Bool
200 | header_fields_update_cb(void *r, char **err)
201 | {
202 | header_field_t *rec = (header_field_t *)r;
203 | char c;
204 |
205 | if (rec->header_name == NULL((void*)0)) {
206 | *err = g_strdup("Header name can't be empty")g_strdup_inline ("Header name can't be empty");
207 | return false0;
208 | }
209 |
210 | g_strstrip(rec->header_name)g_strchomp (g_strchug (rec->header_name));
211 | if (rec->header_name[0] == 0) {
212 | *err = g_strdup("Header name can't be empty")g_strdup_inline ("Header name can't be empty");
213 | return false0;
214 | }
215 |
216 | /* Check for invalid characters (to avoid asserting out when
217 | * registering the field).
218 | */
219 | c = proto_check_field_name(rec->header_name);
220 | if (c) {
221 | *err = ws_strdup_printf("Header name can't contain '%c'", c)wmem_strdup_printf(((void*)0), "Header name can't contain '%c'" , c);
222 | return false0;
223 | }
224 |
225 | *err = NULL((void*)0);
226 | return true1;
227 | }
228 |
229 | static void *
230 | header_fields_copy_cb(void* n, const void* o, size_t siz _U___attribute__((unused)))
231 | {
232 | header_field_t* new_rec = (header_field_t*)n;
233 | const header_field_t* old_rec = (const header_field_t*)o;
234 |
235 | new_rec->header_name = g_strdup(old_rec->header_name)g_strdup_inline (old_rec->header_name);
236 | new_rec->header_desc = g_strdup(old_rec->header_desc)g_strdup_inline (old_rec->header_desc);
237 |
238 | return new_rec;
239 | }
240 |
241 | static void
242 | header_fields_free_cb(void*r)
243 | {
244 | header_field_t* rec = (header_field_t*)r;
245 |
246 | g_free(rec->header_name);
247 | g_free(rec->header_desc);
248 | }
249 |
250 | UAT_CSTRING_CB_DEF(header_fields, header_name, header_field_t)static void header_fields_header_name_set_cb(void* rec, const char* buf, unsigned len, const void* u1 __attribute__((unused )), const void* u2 __attribute__((unused))) { char* new_buf = g_strndup(buf,len); g_free((((header_field_t*)rec)->header_name )); (((header_field_t*)rec)->header_name) = new_buf; } static void header_fields_header_name_tostr_cb(void* rec, char** out_ptr , unsigned* out_len, const void* u1 __attribute__((unused)), const void* u2 __attribute__((unused))) { if (((header_field_t*)rec )->header_name ) { *out_ptr = g_strdup_inline ((((header_field_t *)rec)->header_name)); *out_len = (unsigned)strlen((((header_field_t *)rec)->header_name)); } else { *out_ptr = g_strdup_inline (""); *out_len = 0; } }
251 | UAT_CSTRING_CB_DEF(header_fields, header_desc, header_field_t)static void header_fields_header_desc_set_cb(void* rec, const char* buf, unsigned len, const void* u1 __attribute__((unused )), const void* u2 __attribute__((unused))) { char* new_buf = g_strndup(buf,len); g_free((((header_field_t*)rec)->header_desc )); (((header_field_t*)rec)->header_desc) = new_buf; } static void header_fields_header_desc_tostr_cb(void* rec, char** out_ptr , unsigned* out_len, const void* u1 __attribute__((unused)), const void* u2 __attribute__((unused))) { if (((header_field_t*)rec )->header_desc ) { *out_ptr = g_strdup_inline ((((header_field_t *)rec)->header_desc)); *out_len = (unsigned)strlen((((header_field_t *)rec)->header_desc)); } else { *out_ptr = g_strdup_inline (""); *out_len = 0; } }
252 |
253 | /*
254 | * desegmentation of HTTP headers
255 | * (when we are over TCP or another protocol providing the desegmentation API)
256 | */
257 | static bool_Bool http_desegment_headers = true1;
258 |
259 | /*
260 | * desegmentation of HTTP bodies
261 | * (when we are over TCP or another protocol providing the desegmentation API)
262 | * TODO let the user filter on content-type the bodies he wants desegmented
263 | */
264 | static bool_Bool http_desegment_body = true1;
265 |
266 | /*
267 | * De-chunking of content-encoding: chunk entity bodies.
268 | */
269 | static bool_Bool http_dechunk_body = true1;
270 |
271 | /*
272 | * Decompression of compressed content-encoded entities.
273 | */
274 | static bool_Bool http_decompress_body = true1;
275 |
276 | /*
277 | * Extra checks for valid ASCII data in HTTP headers.
278 | */
279 | static bool_Bool http_check_ascii_headers = false0;
280 |
281 | /*
282 | * Try heuristic sub-dissectors for HTTP message bodies before
283 | * sub-dissectors registered to the Content-Type, aka "MIME sniffing".
284 | * Disabled by default, per RFC 9110.
285 | */
286 | static bool_Bool http_try_heuristic_first;
287 |
288 | /* Simple Service Discovery Protocol
289 | * SSDP is implemented atop HTTP (yes, it really *does* run over UDP).
290 | * SSDP is the discovery protocol of Universal Plug and Play
291 | * UPnP http://www.upnp.org/specs/arch/UPnP-arch-DeviceArchitecture-v1.1.pdf
292 | */
293 | #define TCP_PORT_SSDP1900 1900
294 | #define UDP_PORT_SSDP1900 1900
295 |
296 | /*
297 | * TCP and TLS ports
298 | *
299 | * 2710 is the XBT BitTorrent tracker
300 | */
301 |
302 | #define TCP_DEFAULT_RANGE"80,3128,3132,5985,8080,8088,11371,1900,2869,2710" "80,3128,3132,5985,8080,8088,11371,1900,2869,2710"
303 | #define SCTP_DEFAULT_RANGE"80" "80"
304 | #define TLS_DEFAULT_RANGE"443" "443"
305 |
306 | static range_t *global_http_tls_range;
307 |
308 | static range_t *http_tcp_range;
309 | static range_t *http_sctp_range;
310 | static range_t *http_tls_range;
311 |
312 | typedef void (*ReqRespDissector)(packet_info*, tvbuff_t*, proto_tree*, unsigned, const unsigned char*,
313 | const unsigned char*, http_conv_t *, http_req_res_t *);
314 |
315 | /**
316 | * Transfer codings from
317 | * https://www.iana.org/assignments/http-parameters/http-parameters.xhtml#transfer-coding
318 | * Note: chunked encoding is handled separately.
319 | */
320 | typedef enum _http_transfer_coding {
321 | HTTP_TE_NONE, /* Dummy value for header which is not set */
322 | /* HTTP_TE_CHUNKED, */
323 | HTTP_TE_COMPRESS,
324 | HTTP_TE_DEFLATE,
325 | HTTP_TE_GZIP,
326 | HTTP_TE_IDENTITY,
327 | HTTP_TE_UNKNOWN, /* Header was set, but no valid name was found */
328 | } http_transfer_coding;
329 |
330 | /*
331 | * Structure holding information from headers needed by main
332 | * HTTP dissector code.
333 | */
334 | typedef struct {
335 | char *content_type;
336 | char *content_type_parameters;
337 | int64_t content_length;
338 | char *content_encoding;
339 | char *upgrade;
340 | http_transfer_coding transfer_encoding;
341 | bool_Bool have_content_length;
342 | bool_Bool transfer_encoding_chunked;
343 | } headers_t;
344 |
345 | /* request or response streaming reassembly data */
346 | typedef struct {
347 | /* reassembly information only for request or response with chunked and streaming data */
348 | streaming_reassembly_info_t* streaming_reassembly_info;
349 | /* subdissector handler for request or response with chunked and streaming data */
350 | dissector_handle_t streaming_handle;
351 | /* message being passed to subdissector if the request or response has chunked and streaming data */
352 | media_content_info_t* content_info;
353 | headers_t* main_headers;
354 | } http_streaming_reassembly_data_t;
355 |
356 | /* http request or response private data */
357 | typedef struct {
358 | /* direction of request message */
359 | int req_fwd_flow;
360 | /* request or response streaming reassembly data */
361 | http_streaming_reassembly_data_t* req_streaming_reassembly_data;
362 | http_streaming_reassembly_data_t* res_streaming_reassembly_data;
363 | /* request and response headers */
364 | wmem_map_t *request_headers;
365 | wmem_map_t *response_headers;
366 | } http_req_res_private_data_t;
367 |
368 | typedef struct _request_trans_t {
369 | uint64_t first_range_num;
370 | nstime_t abs_time;
371 | char *request_uri;
372 | uint32_t req_frame;
373 | } request_trans_t;
374 |
375 | typedef struct _match_trans_t {
376 | uint32_t req_frame;
377 | uint32_t resp_frame;
378 | nstime_t delta_time;
379 | char *request_uri;
380 | char *http_host;
381 | } match_trans_t;
382 |
383 | static int parse_http_status_code(const unsigned char *line, const unsigned char *lineend);
384 | static int is_http_request_or_reply(packet_info *pinfo, const char *data, unsigned linelen,
385 | media_container_type_t *type, ReqRespDissector
386 | *reqresp_dissector, http_conv_t *conv_data);
387 | static unsigned chunked_encoding_dissector(tvbuff_t **tvb_ptr, packet_info *pinfo,
388 | proto_tree *tree, unsigned offset);
389 | static bool_Bool valid_header_name(const unsigned char *line, unsigned header_len);
390 | static bool_Bool process_header(tvbuff_t *tvb, unsigned offset, unsigned next_offset,
391 | const unsigned char *line, unsigned linelen, unsigned colon_offset,
392 | packet_info *pinfo, proto_tree *tree,
393 | headers_t *eh_ptr, http_conv_t *conv_data,
394 | media_container_type_t http_type, wmem_map_t *header_value_map,
395 | wmem_allocator_t *header_value_map_allocator, bool_Bool streaming_chunk_mode);
396 | static int find_header_hf_value(tvbuff_t *tvb, unsigned offset, unsigned header_len);
397 | static bool_Bool check_auth_ntlmssp(proto_item *hdr_item, tvbuff_t *tvb,
398 | packet_info *pinfo, char *value);
399 | static bool_Bool check_auth_basic(proto_item *hdr_item, tvbuff_t *tvb,
400 | packet_info *pinfo, char *value);
401 | static bool_Bool check_auth_digest(proto_item* hdr_item, tvbuff_t* tvb, packet_info* pinfo _U___attribute__((unused)), char* value, unsigned offset, unsigned len);
402 | static bool_Bool check_auth_citrixbasic(proto_item *hdr_item, tvbuff_t *tvb, packet_info *pinfo,
403 | char *value, unsigned offset);
404 | static bool_Bool check_auth_kerberos(proto_item *hdr_item, tvbuff_t *tvb,
405 | packet_info *pinfo, const char *value);
406 |
407 | static dissector_table_t port_subdissector_table;
408 | static dissector_table_t media_type_subdissector_table;
409 | static dissector_table_t streaming_content_type_dissector_table;
410 | static dissector_table_t upgrade_subdissector_table;
411 | static heur_dissector_list_t heur_subdissector_list;
412 |
413 | static tap_packet_status
414 | http_eo_packet(void *tapdata, packet_info *pinfo, epan_dissect_t *edt _U___attribute__((unused)), const void *data, tap_flags_t flags _U___attribute__((unused)))
415 | {
416 | export_object_list_t *object_list = (export_object_list_t *)tapdata;
417 | const http_eo_t *eo_info = (const http_eo_t *)data;
418 | export_object_entry_t *entry;
419 |
420 | if(eo_info) { /* We have data waiting for us */
421 | /* These values will be freed when the Export Object window
422 | * is closed. */
423 | entry = g_new(export_object_entry_t, 1)((export_object_entry_t *) g_malloc_n ((1), sizeof (export_object_entry_t )));
424 |
425 | entry->pkt_num = pinfo->num;
426 | /* XXX: Should this remove the port, if any? It's only
427 | * for display, so probably not. */
428 | entry->hostname = g_strdup(eo_info->hostname)g_strdup_inline (eo_info->hostname);
429 | entry->content_type = g_strdup(eo_info->content_type)g_strdup_inline (eo_info->content_type);
430 | /* XXX: Should this remove the query portion, if any, from
431 | * the path? (Or should that be done in the dissector?) */
432 | entry->filename = eo_info->filename ? g_path_get_basename(eo_info->filename) : NULL((void*)0);
433 | entry->payload_len = tvb_captured_length(eo_info->payload);
434 | entry->payload_data = (uint8_t *)tvb_memdup(NULL((void*)0), eo_info->payload, 0, entry->payload_len);
435 |
436 | object_list->add_entry(object_list->gui_data, entry);
437 |
438 | return TAP_PACKET_REDRAW; /* State changed - window should be redrawn */
439 | } else {
440 | return TAP_PACKET_DONT_REDRAW; /* State unchanged - no window updates needed */
441 | }
442 | }
443 |
444 | /* --- HTTP Status Codes */
445 | /* Note: The reference for uncommented entries is RFC 2616 */
446 | const value_string vals_http_status_code[] = {
447 | { 100, "Continue" },
448 | { 101, "Switching Protocols" },
449 | { 102, "Processing" }, /* RFC 2518 */
450 | { 103, "Early Hints" }, /* RFC-ietf-httpbis-early-hints-05 */
451 | { 199, "Informational - Others" },
452 |
453 | { 200, "OK"},
454 | { 201, "Created"},
455 | { 202, "Accepted"},
456 | { 203, "Non-authoritative Information"},
457 | { 204, "No Content"},
458 | { 205, "Reset Content"},
459 | { 206, "Partial Content"},
460 | { 207, "Multi-Status"}, /* RFC 4918 */
461 | { 208, "Already Reported"}, /* RFC 5842 */
462 | { 226, "IM Used"}, /* RFC 3229 */
463 | { 299, "Success - Others"},
464 |
465 | { 300, "Multiple Choices"},
466 | { 301, "Moved Permanently"},
467 | { 302, "Found"},
468 | { 303, "See Other"},
469 | { 304, "Not Modified"},
470 | { 305, "Use Proxy"},
471 | { 307, "Temporary Redirect"},
472 | { 308, "Permanent Redirect"}, /* RFC 7538 */
473 | { 399, "Redirection - Others"},
474 |
475 | { 400, "Bad Request"},
476 | { 401, "Unauthorized"},
477 | { 402, "Payment Required"},
478 | { 403, "Forbidden"},
479 | { 404, "Not Found"},
480 | { 405, "Method Not Allowed"},
481 | { 406, "Not Acceptable"},
482 | { 407, "Proxy Authentication Required"},
483 | { 408, "Request Time-out"},
484 | { 409, "Conflict"},
485 | { 410, "Gone"},
486 | { 411, "Length Required"},
487 | { 412, "Precondition Failed"},
488 | { 413, "Request Entity Too Large"},
489 | { 414, "Request-URI Too Long"},
490 | { 415, "Unsupported Media Type"},
491 | { 416, "Requested Range Not Satisfiable"},
492 | { 417, "Expectation Failed"},
493 | { 418, "I'm a teapot"}, /* RFC 2324 */
494 | { 421, "Misdirected Request"}, /* RFC 7540 */
495 | { 422, "Unprocessable Entity"}, /* RFC 4918 */
496 | { 423, "Locked"}, /* RFC 4918 */
497 | { 424, "Failed Dependency"}, /* RFC 4918 */
498 | { 425, "Too Early"}, /* RFC 8470 */
499 | { 426, "Upgrade Required"}, /* RFC 2817 */
500 | { 428, "Precondition Required"}, /* RFC 6585 */
501 | { 429, "Too Many Requests"}, /* RFC 6585 */
502 | { 431, "Request Header Fields Too Large"}, /* RFC 6585 */
503 | { 451, "Unavailable For Legal Reasons"}, /* RFC 7725 */
504 | { 499, "Client Error - Others"},
505 |
506 | { 500, "Internal Server Error"},
507 | { 501, "Not Implemented"},
508 | { 502, "Bad Gateway"},
509 | { 503, "Service Unavailable"},
510 | { 504, "Gateway Time-out"},
511 | { 505, "HTTP Version not supported"},
512 | { 506, "Variant Also Negotiates"}, /* RFC 2295 */
513 | { 507, "Insufficient Storage"}, /* RFC 4918 */
514 | { 508, "Loop Detected"}, /* RFC 5842 */
515 | { 510, "Not Extended"}, /* RFC 2774 */
516 | { 511, "Network Authentication Required"}, /* RFC 6585 */
517 | { 599, "Server Error - Others"},
518 |
519 | { 0, NULL((void*)0)}
520 | };
521 |
522 | static const char* st_str_reqs = "HTTP Requests by Server";
523 | static const char* st_str_reqs_by_srv_addr = "HTTP Requests by Server Address";
524 | static const char* st_str_reqs_by_http_host = "HTTP Requests by HTTP Host";
525 | static const char* st_str_resps_by_srv_addr = "HTTP Responses by Server Address";
526 |
527 | static int st_node_reqs = -1;
528 | static int st_node_reqs_by_srv_addr = -1;
529 | static int st_node_reqs_by_http_host = -1;
530 | static int st_node_resps_by_srv_addr = -1;
531 |
532 | /* Parse HTTP path sub components RFC3986 Ch 3.3, 3.4 */
533 | void
534 | http_add_path_components_to_tree(tvbuff_t* tvb, packet_info* pinfo _U___attribute__((unused)), proto_item* item, unsigned offset, unsigned length)
535 | {
536 | proto_item* ti;
537 | proto_tree* uri_tree;
538 | unsigned end_offset, end_path_offset, query_offset, path_len, query_len, parameter_offset;
539 | bool_Bool q_off_found, par_off_found;
540 | end_offset = offset + length;
541 | /* The Content-Location (and Referer) headers in HTTP 1.1, and the
542 | * :path header in HTTP/2 can be an absolute-URI or a partial-URI;
543 | * i.e. that they can include a path and a query, but not a fragment.
544 | * RFC 7230 2.7 Uniform Request Identifiers, RFC 7231 Appendices C and D,
545 | * RFC 7540 8.1.2.3. Request Pseudo-Header Fields
546 | * Look for a ? to mark a query.
547 | */
548 | q_off_found = tvb_find_uint8_length(tvb, offset, length, '?', &query_offset);
549 | end_path_offset = (q_off_found == false0) ? end_offset : query_offset;
550 | par_off_found = tvb_ws_mempbrk_uint8_length(tvb, offset + 1, end_path_offset - offset - 1, &pbrk_sub_delims, &parameter_offset, NULL((void*)0));
551 | if (q_off_found == false0 && par_off_found == false0) {
552 | /* Nothing interesting, no need to split. */
553 | return;
554 | }
555 | uri_tree = proto_item_add_subtree(item, ett_http_request_uri);
556 | path_len = end_path_offset - offset;
557 | proto_tree_add_item(uri_tree, hf_http_request_path, tvb, offset, path_len, ENC_ASCII0x00000000);
558 | if (!tvb_ws_mempbrk_uint8_length(tvb, offset + 1, end_path_offset - offset - 1, &pbrk_sub_delims, &parameter_offset, NULL((void*)0))) {
559 | proto_tree* path_tree = proto_item_add_subtree(item, ett_http_request_path);
560 | while (offset < end_path_offset) {
561 | if (!tvb_ws_mempbrk_uint8_length(tvb, offset + 1, end_path_offset - offset - 1, &pbrk_sub_delims, &parameter_offset, NULL((void*)0))) {
562 | parameter_offset = end_path_offset;
563 | }
564 | proto_tree_add_item(path_tree, hf_http_request_path_segment, tvb, offset, parameter_offset - offset, ENC_ASCII0x00000000);
565 | offset = parameter_offset + 1;
566 | }
567 | }
568 | if (q_off_found == false0) {
569 | return;
570 | }
571 | /* Skip past the delimiter. */
572 | query_offset++;
573 | query_len = end_offset - query_offset;
574 | offset = query_offset;
575 | ti = proto_tree_add_item(uri_tree, hf_http_request_query, tvb, query_offset, query_len, ENC_ASCII0x00000000);
576 | proto_tree *query_tree = proto_item_add_subtree(ti, ett_http_request_query);
577 | while (offset < end_offset) {
578 | if (!tvb_ws_mempbrk_uint8_length(tvb, offset + 1, end_offset - offset - 1, &pbrk_sub_delims, &parameter_offset, NULL((void*)0))) {
579 | parameter_offset = end_offset;
580 | }
581 | proto_tree_add_item(query_tree, hf_http_request_query_parameter, tvb, offset, parameter_offset - offset, ENC_ASCII0x00000000);
582 | offset = parameter_offset + 1;
583 | }
584 | }
585 |
586 | /* HTTP/Load Distribution stats init function */
587 | static void
588 | http_reqs_stats_tree_init(stats_tree* st)
589 | {
590 | st_node_reqs = stats_tree_create_node(st, st_str_reqs, 0, STAT_DT_INT, true1);
591 | st_node_reqs_by_srv_addr = stats_tree_create_node(st, st_str_reqs_by_srv_addr, st_node_reqs, STAT_DT_INT, true1);
592 | st_node_reqs_by_http_host = stats_tree_create_node(st, st_str_reqs_by_http_host, st_node_reqs, STAT_DT_INT, true1);
593 | st_node_resps_by_srv_addr = stats_tree_create_node(st, st_str_resps_by_srv_addr, 0, STAT_DT_INT, true1);
594 | }
595 |
596 | /* HTTP/Load Distribution stats packet function */
597 | static tap_packet_status
598 | http_reqs_stats_tree_packet(stats_tree* st, packet_info* pinfo, epan_dissect_t* edt _U___attribute__((unused)), const void* p, tap_flags_t flags _U___attribute__((unused)))
599 | {
600 | const http_info_value_t* v = (const http_info_value_t*)p;
601 | int reqs_by_this_host;
602 | int reqs_by_this_addr;
603 | int resps_by_this_addr;
604 | int i = v->response_code;
605 | char *ip_str;
606 |
607 |
608 | if (v->request_method) {
609 | ip_str = address_to_str(NULL((void*)0), &pinfo->dst);
610 |
611 | tick_stat_node(st, st_str_reqs, 0, false)(stats_tree_manip_node_int(MN_INCREASE,(st),(st_str_reqs),(0) ,(0),1));
612 | tick_stat_node(st, st_str_reqs_by_srv_addr, st_node_reqs, true)(stats_tree_manip_node_int(MN_INCREASE,(st),(st_str_reqs_by_srv_addr ),(st_node_reqs),(1),1));
613 | tick_stat_node(st, st_str_reqs_by_http_host, st_node_reqs, true)(stats_tree_manip_node_int(MN_INCREASE,(st),(st_str_reqs_by_http_host ),(st_node_reqs),(1),1));
614 | reqs_by_this_addr = tick_stat_node(st, ip_str, st_node_reqs_by_srv_addr, true)(stats_tree_manip_node_int(MN_INCREASE,(st),(ip_str),(st_node_reqs_by_srv_addr ),(1),1));
615 |
616 | if (v->http_host) {
617 | reqs_by_this_host = tick_stat_node(st, v->http_host, st_node_reqs_by_http_host, true)(stats_tree_manip_node_int(MN_INCREASE,(st),(v->http_host) ,(st_node_reqs_by_http_host),(1),1));
618 | tick_stat_node(st, ip_str, reqs_by_this_host, false)(stats_tree_manip_node_int(MN_INCREASE,(st),(ip_str),(reqs_by_this_host ),(0),1));
619 |
620 | tick_stat_node(st, v->http_host, reqs_by_this_addr, false)(stats_tree_manip_node_int(MN_INCREASE,(st),(v->http_host) ,(reqs_by_this_addr),(0),1));
621 | }
622 |
623 | wmem_free(NULL((void*)0), ip_str);
624 |
625 | return TAP_PACKET_REDRAW;
626 |
627 | } else if (i != 0) {
628 | ip_str = address_to_str(NULL((void*)0), &pinfo->src);
629 |
630 | tick_stat_node(st, st_str_resps_by_srv_addr, 0, false)(stats_tree_manip_node_int(MN_INCREASE,(st),(st_str_resps_by_srv_addr ),(0),(0),1));
631 | resps_by_this_addr = tick_stat_node(st, ip_str, st_node_resps_by_srv_addr, true)(stats_tree_manip_node_int(MN_INCREASE,(st),(ip_str),(st_node_resps_by_srv_addr ),(1),1));
632 |
633 | if ( (i>=100)&&(i<400) ) {
634 | tick_stat_node(st, "OK", resps_by_this_addr, false)(stats_tree_manip_node_int(MN_INCREASE,(st),("OK"),(resps_by_this_addr ),(0),1));
635 | } else {
636 | tick_stat_node(st, "Error", resps_by_this_addr, false)(stats_tree_manip_node_int(MN_INCREASE,(st),("Error"),(resps_by_this_addr ),(0),1));
637 | }
638 |
639 | wmem_free(NULL((void*)0), ip_str);
640 |
641 | return TAP_PACKET_REDRAW;
642 | }
643 |
644 | return TAP_PACKET_DONT_REDRAW;
645 | }
646 |
647 |
648 | static int st_node_requests_by_host = -1;
649 | static const char *st_str_requests_by_host = "HTTP Requests by HTTP Host";
650 |
651 | /* HTTP/Requests stats init function */
652 | static void
653 | http_req_stats_tree_init(stats_tree* st)
654 | {
655 | st_node_requests_by_host = stats_tree_create_node(st, st_str_requests_by_host, 0, STAT_DT_INT, true1);
656 | }
657 |
658 | /* HTTP/Requests stats packet function */
659 | static tap_packet_status
660 | http_req_stats_tree_packet(stats_tree* st, packet_info* pinfo _U___attribute__((unused)), epan_dissect_t* edt _U___attribute__((unused)), const void* p, tap_flags_t flags _U___attribute__((unused)))
661 | {
662 | const http_info_value_t* v = (const http_info_value_t*)p;
663 | int reqs_by_this_host;
664 |
665 | if (v->request_method) {
666 | tick_stat_node(st, st_str_requests_by_host, 0, false)(stats_tree_manip_node_int(MN_INCREASE,(st),(st_str_requests_by_host ),(0),(0),1));
667 |
668 | if (v->http_host) {
669 | reqs_by_this_host = tick_stat_node(st, v->http_host, st_node_requests_by_host, true)(stats_tree_manip_node_int(MN_INCREASE,(st),(v->http_host) ,(st_node_requests_by_host),(1),1));
670 |
671 | if (v->request_uri) {
672 | tick_stat_node(st, v->request_uri, reqs_by_this_host, true)(stats_tree_manip_node_int(MN_INCREASE,(st),(v->request_uri ),(reqs_by_this_host),(1),1));
673 | }
674 | }
675 |
676 | return TAP_PACKET_REDRAW;
677 | }
678 |
679 | return TAP_PACKET_DONT_REDRAW;
680 | }
681 |
682 | static const char *st_str_packets = "Total HTTP Packets";
683 | static const char *st_str_requests = "HTTP Request Packets";
684 | static const char *st_str_responses = "HTTP Response Packets";
685 | static const char *st_str_resp_broken = "???: broken";
686 | static const char *st_str_resp_100 = "1xx: Informational";
687 | static const char *st_str_resp_200 = "2xx: Success";
688 | static const char *st_str_resp_300 = "3xx: Redirection";
689 | static const char *st_str_resp_400 = "4xx: Client Error";
690 | static const char *st_str_resp_500 = "5xx: Server Error";
691 | static const char *st_str_other = "Other HTTP Packets";
692 |
693 | static int st_node_packets = -1;
694 | static int st_node_requests = -1;
695 | static int st_node_responses = -1;
696 | static int st_node_resp_broken = -1;
697 | static int st_node_resp_100 = -1;
698 | static int st_node_resp_200 = -1;
699 | static int st_node_resp_300 = -1;
700 | static int st_node_resp_400 = -1;
701 | static int st_node_resp_500 = -1;
702 | static int st_node_other = -1;
703 |
704 |
705 | /* HTTP/Packet Counter stats init function */
706 | static void
707 | http_stats_tree_init(stats_tree* st)
708 | {
709 | st_node_packets = stats_tree_create_node(st, st_str_packets, 0, STAT_DT_INT, true1);
710 | st_node_requests = stats_tree_create_pivot(st, st_str_requests, st_node_packets);
711 | st_node_responses = stats_tree_create_node(st, st_str_responses, st_node_packets, STAT_DT_INT, true1);
712 | st_node_resp_broken = stats_tree_create_node(st, st_str_resp_broken, st_node_responses, STAT_DT_INT, true1);
713 | st_node_resp_100 = stats_tree_create_node(st, st_str_resp_100, st_node_responses, STAT_DT_INT, true1);
714 | st_node_resp_200 = stats_tree_create_node(st, st_str_resp_200, st_node_responses, STAT_DT_INT, true1);
715 | st_node_resp_300 = stats_tree_create_node(st, st_str_resp_300, st_node_responses, STAT_DT_INT, true1);
716 | st_node_resp_400 = stats_tree_create_node(st, st_str_resp_400, st_node_responses, STAT_DT_INT, true1);
717 | st_node_resp_500 = stats_tree_create_node(st, st_str_resp_500, st_node_responses, STAT_DT_INT, true1);
718 | st_node_other = stats_tree_create_node(st, st_str_other, st_node_packets, STAT_DT_INT, false0);
719 | }
720 |
721 | /* HTTP/Packet Counter stats packet function */
722 | static tap_packet_status
723 | http_stats_tree_packet(stats_tree* st, packet_info* pinfo, epan_dissect_t* edt _U___attribute__((unused)), const void* p, tap_flags_t flags _U___attribute__((unused)))
724 | {
725 | const http_info_value_t* v = (const http_info_value_t*)p;
726 | unsigned i = v->response_code;
727 | int resp_grp;
728 | const char *resp_str;
729 | char* str;
730 |
731 | tick_stat_node(st, st_str_packets, 0, false)(stats_tree_manip_node_int(MN_INCREASE,(st),(st_str_packets), (0),(0),1));
732 |
733 | if (i) {
734 | tick_stat_node(st, st_str_responses, st_node_packets, false)(stats_tree_manip_node_int(MN_INCREASE,(st),(st_str_responses ),(st_node_packets),(0),1));
735 |
736 | if ( (i<100)||(i>=600) ) {
737 | resp_grp = st_node_resp_broken;
738 | resp_str = st_str_resp_broken;
739 | } else if (i<200) {
740 | resp_grp = st_node_resp_100;
741 | resp_str = st_str_resp_100;
742 | } else if (i<300) {
743 | resp_grp = st_node_resp_200;
744 | resp_str = st_str_resp_200;
745 | } else if (i<400) {
746 | resp_grp = st_node_resp_300;
747 | resp_str = st_str_resp_300;
748 | } else if (i<500) {
749 | resp_grp = st_node_resp_400;
750 | resp_str = st_str_resp_400;
751 | } else {
752 | resp_grp = st_node_resp_500;
753 | resp_str = st_str_resp_500;
754 | }
755 |
756 | tick_stat_node(st, resp_str, st_node_responses, false)(stats_tree_manip_node_int(MN_INCREASE,(st),(resp_str),(st_node_responses ),(0),1));
757 |
758 | str = wmem_strdup_printf(pinfo->pool, "%u %s", i,
759 | val_to_str(pinfo->pool, i, vals_http_status_code, "Unknown (%d)"));
760 | tick_stat_node(st, str, resp_grp, false)(stats_tree_manip_node_int(MN_INCREASE,(st),(str),(resp_grp), (0),1));
761 | } else if (v->request_method) {
762 | stats_tree_tick_pivot(st,st_node_requests,v->request_method);
763 | } else {
764 | tick_stat_node(st, st_str_other, st_node_packets, false)(stats_tree_manip_node_int(MN_INCREASE,(st),(st_str_other),(st_node_packets ),(0),1));
765 | }
766 |
767 | return TAP_PACKET_REDRAW;
768 | }
769 |
770 | /*
771 | Generates a referer tree - a best-effort representation of which web request led to which.
772 |
773 | Some challenges:
774 | A user can be forwarded to a single sites from multiple sources. For example,
775 | google.com -> foo.com and bing.com -> foo.com. A URI alone is not unique.
776 |
777 | Additionally, if a user has a subsequent request to foo.com -> bar.com, the
778 | full chain could either be:
779 | google.com -> foo.com -> bar.com, or
780 | bing.com -> foo.com -> bar.com,
781 |
782 | This indicates that a URI and its referer are not unique. Only a URI and its
783 | full referer chain are unique. However, HTTP requests only contain the URI
784 | and the immediate referer. This means that any attempt at generating a
785 | referer tree is inherently going to be a best-effort approach.
786 |
787 | This code assumes that the referer in a request is from the most-recent request
788 | to that referer.
789 |
790 | * To maintain readability of the statistics, whenever a site is visited, all
791 | prior referers are 'ticked' as well, so that one can easily see the breakdown.
792 | */
793 |
794 | /* Root node for all referer statistics */
795 | static int st_node_requests_by_referer = -1;
796 | /* Referer statistics root node's text */
797 | static const char *st_str_request_sequences = "HTTP Request Sequences";
798 |
799 | /* Mapping of URIs to the most-recently seen node id */
800 | static wmem_map_t* refstats_uri_to_node_id_hash;
801 | /* Mapping of node ids to the node's URI ('name' value) */
802 | static wmem_map_t* refstats_node_id_to_uri_hash;
803 | /* Mapping of node ids to the parent node id */
804 | static wmem_map_t* refstats_node_id_to_parent_node_id_hash;
805 |
806 |
807 | /* HTTP/Request Sequences stats init function */
808 | static void
809 | http_seq_stats_tree_init(stats_tree* st)
810 | {
811 | int root_node_id = 0;
812 | void *root_node_id_p = GINT_TO_POINTER(root_node_id)((gpointer) (glong) (root_node_id));
813 | void *node_id_p = NULL((void*)0);
814 | char *uri = NULL((void*)0);
815 |
816 | refstats_node_id_to_parent_node_id_hash = wmem_map_new(wmem_file_scope(), g_direct_hash, g_direct_equal);
817 | refstats_node_id_to_uri_hash = wmem_map_new(wmem_file_scope(), g_direct_hash, g_direct_equal);
818 | refstats_uri_to_node_id_hash = wmem_map_new(wmem_file_scope(), wmem_str_hash, g_str_equal);
819 |
820 | /* Add the root node and its mappings */
821 | st_node_requests_by_referer = stats_tree_create_node(st, st_str_request_sequences, root_node_id, STAT_DT_INT, true1);
822 | node_id_p = GINT_TO_POINTER(st_node_requests_by_referer)((gpointer) (glong) (st_node_requests_by_referer));
823 | uri = wmem_strdup(wmem_file_scope(), st_str_request_sequences);
824 |
825 | wmem_map_insert(refstats_uri_to_node_id_hash, uri, node_id_p);
826 | wmem_map_insert(refstats_node_id_to_uri_hash, node_id_p, uri);
827 | wmem_map_insert(refstats_node_id_to_parent_node_id_hash, node_id_p, root_node_id_p);
828 | }
829 |
830 | static int
831 | http_seq_stats_tick_referer(stats_tree* st, const char* arg_referer_uri)
832 | {
833 | int root_node_id = st_node_requests_by_referer;
834 | void *root_node_id_p = GINT_TO_POINTER(st_node_requests_by_referer)((gpointer) (glong) (st_node_requests_by_referer));
835 | int referer_node_id;
836 | void *referer_node_id_p;
837 | int referer_parent_node_id;
838 | void *referer_parent_node_id_p;
839 | char *referer_uri;
840 |
841 | /* Tick the referer's URI */
842 | /* Does the node exist? */
843 | if (!wmem_map_lookup_extended(refstats_uri_to_node_id_hash, arg_referer_uri, NULL((void*)0), &referer_node_id_p)) {
844 | /* The node for the referer didn't already exist, create the mappings */
845 | referer_node_id = tick_stat_node(st, arg_referer_uri, root_node_id, true)(stats_tree_manip_node_int(MN_INCREASE,(st),(arg_referer_uri) ,(root_node_id),(1),1));
846 | referer_node_id_p = GINT_TO_POINTER(referer_node_id)((gpointer) (glong) (referer_node_id));
847 | referer_parent_node_id_p = root_node_id_p;
848 |
849 | referer_uri = wmem_strdup(wmem_file_scope(), arg_referer_uri);
850 | wmem_map_insert(refstats_uri_to_node_id_hash, referer_uri, referer_node_id_p);
851 | wmem_map_insert(refstats_node_id_to_uri_hash, referer_node_id_p, referer_uri);
852 | wmem_map_insert(refstats_node_id_to_parent_node_id_hash, referer_node_id_p, referer_parent_node_id_p);
853 | } else {
854 | /* The node for the referer already exists, tick it */
855 | referer_parent_node_id_p = wmem_map_lookup(refstats_node_id_to_parent_node_id_hash, referer_node_id_p);
856 | referer_parent_node_id = GPOINTER_TO_INT(referer_parent_node_id_p)((gint) (glong) (referer_parent_node_id_p));
857 | referer_node_id = tick_stat_node(st, arg_referer_uri, referer_parent_node_id, true)(stats_tree_manip_node_int(MN_INCREASE,(st),(arg_referer_uri) ,(referer_parent_node_id),(1),1));
858 | }
859 | return referer_node_id;
860 | }
861 |
862 | static void
863 | http_seq_stats_tick_request(stats_tree* st, const char* arg_full_uri, int referer_node_id)
864 | {
865 | void *referer_node_id_p = GINT_TO_POINTER(referer_node_id)((gpointer) (glong) (referer_node_id));
866 | int node_id;
867 | void *node_id_p;
868 | char *uri;
869 |
870 | node_id = tick_stat_node(st, arg_full_uri, referer_node_id, true)(stats_tree_manip_node_int(MN_INCREASE,(st),(arg_full_uri),(referer_node_id ),(1),1));
871 | node_id_p = GINT_TO_POINTER(node_id)((gpointer) (glong) (node_id));
872 |
873 | /* Update the mappings. Even if the URI was already seen, the URI->node mapping may need to be updated */
874 |
875 | /* Is this a new node? */
876 | uri = (char *) wmem_map_lookup(refstats_node_id_to_uri_hash, node_id_p);
877 | if (!uri) {
878 | /* node not found, add mappings for the node and uri */
879 | uri = wmem_strdup(wmem_file_scope(), arg_full_uri);
880 |
881 | wmem_map_insert(refstats_uri_to_node_id_hash, uri, node_id_p);
882 | wmem_map_insert(refstats_node_id_to_uri_hash, node_id_p, uri);
883 | wmem_map_insert(refstats_node_id_to_parent_node_id_hash, node_id_p, referer_node_id_p);
884 | } else {
885 | /* We've seen the node id before. Update the URI mapping refer to this node id*/
886 | wmem_map_insert(refstats_uri_to_node_id_hash, uri, node_id_p);
887 | }
888 | }
889 |
890 | char*
891 | determine_http_location_target(wmem_allocator_t *scope, const char *base_url, const char * location_url)
892 | {
893 | /* Resolving a base URI + relative URI to an absolute URI ("Relative Resolution")
894 | is complicated. Because of that, we take shortcuts that may result in
895 | inaccurate results, but is also significantly simpler.
896 | It would be best to use an external library to do this for us.
897 | For reference, the RFC is located at https://tools.ietf.org/html/rfc3986#section-5.4
898 |
899 | Returns NULL if the resolution fails
900 | */
901 | char *final_target;
902 |
903 | /* base_url must be an absolute URL.*/
904 | if (strstr(base_url, "://") == NULL((void*)0)){
905 | return NULL((void*)0);
906 | }
907 |
908 | /* Empty Location */
909 | if (location_url[0] == '\0') {
910 | final_target = wmem_strdup(scope, base_url);
911 | return final_target;
912 | }
913 | /* Protocol Relative */
914 | else if (g_str_has_prefix(location_url, "//")(__builtin_constant_p ("//")? __extension__ ({ const char * const __str = (location_url); const char * const __prefix = ("//") ; gboolean __result = (0); if (__str == ((void*)0) || __prefix == ((void*)0)) __result = (g_str_has_prefix) (__str, __prefix ); else { const size_t __str_len = strlen (((__str) + !(__str ))); const size_t __prefix_len = strlen (((__prefix) + !(__prefix ))); if (__str_len >= __prefix_len) __result = memcmp (((__str ) + !(__str)), ((__prefix) + !(__prefix)), __prefix_len) == 0 ; } __result; }) : (g_str_has_prefix) (location_url, "//") ) ) {
915 | char *base_scheme = g_uri_parse_scheme(base_url);
916 | if (base_scheme == NULL((void*)0)) {
917 | return NULL((void*)0);
918 | }
919 | final_target = wmem_strdup_printf(scope, "%s:%s", base_scheme, location_url);
920 | g_free(base_scheme);
921 | return final_target;
922 | }
923 | /* Absolute URL*/
924 | else if (strstr(location_url, "://") != NULL((void*)0)) {
925 | final_target = wmem_strdup(scope, location_url);
926 | return final_target;
927 | }
928 | /* Relative */
929 | else {
930 | char *start_fragment = strstr(base_url, "#");
931 | char *start_query = NULL((void*)0);
932 | char *base_url_no_fragment = NULL((void*)0);
933 | char *base_url_no_query = NULL((void*)0);
934 |
935 | /* Strip off the fragment (which should never be present)*/
936 | if (start_fragment == NULL((void*)0)) {
937 | base_url_no_fragment = wmem_strdup(scope, base_url);
938 | }
939 | else {
940 | base_url_no_fragment = wmem_strndup(scope, base_url, start_fragment - base_url);
941 | }
942 |
943 | /* Strip off the query (Queries are stripped from all relative URIs) */
944 | start_query = strstr(base_url_no_fragment, "?");
945 | if (start_query == NULL((void*)0)) {
946 | base_url_no_query = wmem_strdup(scope, base_url_no_fragment);
947 | }
948 | else {
949 | base_url_no_query = wmem_strndup(scope, base_url_no_fragment, start_query - base_url_no_fragment);
950 | }
951 |
952 | /* A leading question mark (?) means to replace the old query with the new*/
953 | if (g_str_has_prefix(location_url, "?")(__builtin_constant_p ("?")? __extension__ ({ const char * const __str = (location_url); const char * const __prefix = ("?"); gboolean __result = (0); if (__str == ((void*)0) || __prefix == ((void*)0)) __result = (g_str_has_prefix) (__str, __prefix ); else { const size_t __str_len = strlen (((__str) + !(__str ))); const size_t __prefix_len = strlen (((__prefix) + !(__prefix ))); if (__str_len >= __prefix_len) __result = memcmp (((__str ) + !(__str)), ((__prefix) + !(__prefix)), __prefix_len) == 0 ; } __result; }) : (g_str_has_prefix) (location_url, "?") )) {
954 | final_target = wmem_strdup_printf(scope, "%s%s", base_url_no_query, location_url);
955 | return final_target;
956 | }
957 | else {
958 | /* We have already tested strstr(base_url) above */
959 | char *scheme_end;
960 | scheme_end = strstr(base_url_no_query, "://");
961 | if (!(scheme_end)) {
962 | return NULL((void*)0);
963 | }
964 | scheme_end += strlen("://");
965 | /* A leading slash means to put the location after the netloc */
966 | if (g_str_has_prefix(location_url, "/")(__builtin_constant_p ("/")? __extension__ ({ const char * const __str = (location_url); const char * const __prefix = ("/"); gboolean __result = (0); if (__str == ((void*)0) || __prefix == ((void*)0)) __result = (g_str_has_prefix) (__str, __prefix ); else { const size_t __str_len = strlen (((__str) + !(__str ))); const size_t __prefix_len = strlen (((__prefix) + !(__prefix ))); if (__str_len >= __prefix_len) __result = memcmp (((__str ) + !(__str)), ((__prefix) + !(__prefix)), __prefix_len) == 0 ; } __result; }) : (g_str_has_prefix) (location_url, "/") )) {
967 | char *netloc_end;
968 | int netloc_length;
969 |
970 | netloc_end = strstr(scheme_end, "/");
971 | if (!(netloc_end)) {
972 | return NULL((void*)0);
973 | }
974 | netloc_length = (int) (netloc_end - base_url_no_query);
975 | final_target = wmem_strdup_printf(scope, "%.*s%s", netloc_length, base_url_no_query, location_url);
976 | return final_target;
977 | }
978 | /* Otherwise, it replaces the last element in the URI */
979 | else {
980 | char *end_of_path = g_strrstr(scheme_end, "/");
981 |
982 | if (end_of_path != NULL((void*)0)) {
983 | int base_through_path = (int) (end_of_path - base_url_no_query);
984 | final_target = wmem_strdup_printf(scope, "%.*s/%s", base_through_path, base_url_no_query, location_url);
985 | }
986 | else {
987 | final_target = wmem_strdup_printf(scope, "%s/%s", base_url_no_query, location_url);
988 | }
989 | return final_target;
990 | }
991 | }
992 | }
993 | return NULL((void*)0);
994 | }
995 |
996 | /* HTTP/Request Sequences stats packet function */
997 | static tap_packet_status
998 | http_seq_stats_tree_packet(stats_tree* st, packet_info* pinfo, epan_dissect_t* edt _U___attribute__((unused)), const void* p, tap_flags_t flags _U___attribute__((unused)))
999 | {
1000 | const http_info_value_t* v = (const http_info_value_t*)p;
1001 |
1002 | /* Track HTTP Redirects */
1003 | if (v->location_target && v->location_base_uri) {
1004 | int referer_node_id;
1005 | int parent_node_id;
1006 | void *parent_node_id_p;
1007 | void *current_node_id_p;
1008 | char *uri = NULL((void*)0);
1009 |
1010 | char *absolute_target = determine_http_location_target(pinfo->pool, v->location_base_uri, v->location_target);
1011 | /* absolute_target is NULL if the resolution fails */
1012 | if (absolute_target != NULL((void*)0)) {
1013 | /* We assume the user makes the request to the absolute_target */
1014 | /* Tick the base URI */
1015 | referer_node_id = http_seq_stats_tick_referer(st, v->location_base_uri);
1016 |
1017 | /* Tick the location header's resolved URI */
1018 | http_seq_stats_tick_request(st, absolute_target, referer_node_id);
1019 |
1020 | /* Tick all stats nodes above the location */
1021 | current_node_id_p = GINT_TO_POINTER(referer_node_id)((gpointer) (glong) (referer_node_id));
1022 | while (wmem_map_lookup_extended(refstats_node_id_to_parent_node_id_hash, current_node_id_p, NULL((void*)0), &parent_node_id_p)) {
1023 | parent_node_id = GPOINTER_TO_INT(parent_node_id_p)((gint) (glong) (parent_node_id_p));
1024 | uri = (char *) wmem_map_lookup(refstats_node_id_to_uri_hash, current_node_id_p);
1025 | tick_stat_node(st, uri, parent_node_id, true)(stats_tree_manip_node_int(MN_INCREASE,(st),(uri),(parent_node_id ),(1),1));
1026 | current_node_id_p = parent_node_id_p;
1027 | }
1028 | }
1029 | }
1030 |
1031 | /* Track HTTP Requests/Referers */
1032 | if (v->request_method && v->referer_uri && v->full_uri) {
1033 | int referer_node_id;
1034 | int parent_node_id;
1035 | void *parent_node_id_p;
1036 | void *current_node_id_p;
1037 | char *uri = NULL((void*)0);
1038 | /* Tick the referer's URI */
1039 | referer_node_id = http_seq_stats_tick_referer(st, v->referer_uri);
1040 |
1041 | /* Tick the request's URI */
1042 | http_seq_stats_tick_request(st, v->full_uri, referer_node_id);
1043 |
1044 | /* Tick all stats nodes above the referer */
1045 | current_node_id_p = GINT_TO_POINTER(referer_node_id)((gpointer) (glong) (referer_node_id));
1046 | while (wmem_map_lookup_extended(refstats_node_id_to_parent_node_id_hash, current_node_id_p, NULL((void*)0), &parent_node_id_p)) {
1047 | parent_node_id = GPOINTER_TO_INT(parent_node_id_p)((gint) (glong) (parent_node_id_p));
1048 | uri = (char *) wmem_map_lookup(refstats_node_id_to_uri_hash, current_node_id_p);
1049 | tick_stat_node(st, uri, parent_node_id, true)(stats_tree_manip_node_int(MN_INCREASE,(st),(uri),(parent_node_id ),(1),1));
1050 | current_node_id_p = parent_node_id_p;
1051 | }
1052 | }
1053 | return TAP_PACKET_DONT_REDRAW;
1054 | }
1055 |
1056 |
1057 | static void
1058 | dissect_http_ntlmssp(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree,
1059 | const char *line)
1060 | {
1061 | tvbuff_t *ntlmssp_tvb;
1062 |
1063 | ntlmssp_tvb = base64_to_tvb(tvb, line);
1064 | add_new_data_source(pinfo, ntlmssp_tvb, "NTLMSSP / GSSAPI Data");
1065 | if (tvb_strneql(ntlmssp_tvb, 0, "NTLMSSP", 7) == 0)
1066 | call_dissector(ntlmssp_handle, ntlmssp_tvb, pinfo, tree);
1067 | else
1068 | call_dissector(gssapi_handle, ntlmssp_tvb, pinfo, tree);
1069 | }
1070 |
1071 | static void
1072 | dissect_http_kerberos(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree,
1073 | const char *line)
1074 | {
1075 | tvbuff_t *kerberos_tvb;
1076 |
1077 | kerberos_tvb = base64_to_tvb(tvb, line + 9); /* skip 'Kerberos ' which is 9 chars */
1078 | add_new_data_source(pinfo, kerberos_tvb, "Kerberos Data");
1079 | call_dissector(gssapi_handle, kerberos_tvb, pinfo, tree);
1080 |
1081 | }
1082 |
1083 |
1084 | static http_conv_t *
1085 | get_http_conversation_data(packet_info *pinfo, conversation_t **conversation)
1086 | {
1087 | http_conv_t *conv_data;
1088 |
1089 | *conversation = find_or_create_conversation(pinfo);
1090 |
1091 | /* Retrieve information from conversation
1092 | * or add it if it isn't there yet
1093 | */
1094 | conv_data = (http_conv_t *)conversation_get_proto_data(*conversation, proto_http);
1095 | if(!conv_data) {
1096 | /* Setup the conversation structure itself */
1097 | conv_data = wmem_new0(wmem_file_scope(), http_conv_t)((http_conv_t*)wmem_alloc0((wmem_file_scope()), sizeof(http_conv_t )));
1098 | conv_data->chunk_offsets_fwd = wmem_map_new(wmem_file_scope(), g_direct_hash, g_direct_equal);
1099 | conv_data->chunk_offsets_rev = wmem_map_new(wmem_file_scope(), g_direct_hash, g_direct_equal);
1100 | conv_data->req_list = NULL((void*)0);
1101 | conv_data->matches_table = wmem_map_new(wmem_file_scope(), g_direct_hash, g_direct_equal);
1102 |
1103 | conversation_add_proto_data(*conversation, proto_http,
1104 | conv_data);
1105 | }
1106 |
1107 | return conv_data;
1108 | }
1109 |
1110 | /**
1111 | * create a new http_req_res_t and add it to the conversation.
1112 | * @return the new allocated object which is already added to the linked list
1113 | */
1114 | static http_req_res_t*
1115 | push_req_res(http_conv_t *conv_data)
1116 | {
1117 | http_req_res_t *req_res = wmem_new0(wmem_file_scope(), http_req_res_t)((http_req_res_t*)wmem_alloc0((wmem_file_scope()), sizeof(http_req_res_t )));
1118 |
1119 | nstime_set_unset(&(req_res->req_ts));
1120 | conv_data->req_res_tail = req_res;
1121 | req_res->private_data = wmem_new0(wmem_file_scope(), http_req_res_private_data_t)((http_req_res_private_data_t*)wmem_alloc0((wmem_file_scope() ), sizeof(http_req_res_private_data_t)));
1122 |
1123 | return req_res;
1124 | }
1125 |
1126 | /**
1127 | * push a request frame number and its time stamp to the conversation data.
1128 | */
1129 | static http_req_res_t*
1130 | push_req(http_conv_t *conv_data, packet_info *pinfo)
1131 | {
1132 | /* a request will always create a new http_req_res_t object */
1133 | http_req_res_t *req_res = push_req_res(conv_data);
1134 |
1135 | req_res->req_framenum = pinfo->num;
1136 | req_res->req_ts = pinfo->abs_ts;
1137 |
1138 | /* XXX: Using the same proto key for the frame doesn't work well
1139 | * with HTTP 1.1 pipelining, or other situations where more
1140 | * than one request can appear in a frame.
1141 | */
1142 | p_add_proto_data(wmem_file_scope(), pinfo, proto_http, HTTP_PROTO_DATA_REQRES0, req_res);
1143 |
1144 | return req_res;
1145 | }
1146 |
1147 | /**
1148 | * push a response frame number to the conversation data.
1149 | */
1150 | static http_req_res_t*
1151 | push_res(http_conv_t *conv_data, packet_info *pinfo)
1152 | {
1153 | /* a response will create a new http_req_res_t object: if no
1154 | object exists, or if the most recent one is already for
1155 | a different response. (Exception: If the previous response
1156 | code was in the Informational 1xx category, then it was
1157 | an interim response, and this response could be for the same
1158 | request.) In both cases the corresponding request was not
1159 | detected/included in the conversation. In all other cases
1160 | the http_req_res_t object created by the request is
1161 | used. */
1162 | /* XXX: This finds the only most recent request and doesn't support
1163 | * HTTP 1.1 pipelining. This limitation has been addressed for
1164 | * HTTP GETS if Range Requests are supported.
1165 | */
1166 | http_req_res_t *req_res = conv_data->req_res_tail;
1167 | if (!req_res || (req_res->res_framenum > 0 && req_res->response_code >= 200)) {
1168 | req_res = push_req_res(conv_data);
1169 | }
1170 | req_res->res_framenum = pinfo->num;
1171 | /* XXX: Using the same proto key for the frame doesn't work well
1172 | * with HTTP 1.1 pipelining, or other situations where more
1173 | * than one request can appear in a frame and multiple outstanding
1174 | * GET requests. The latter has been addressed with matches_table."
1175 | */
1176 | p_add_proto_data(wmem_file_scope(), pinfo, proto_http, HTTP_PROTO_DATA_REQRES0, req_res);
1177 |
1178 | return req_res;
1179 | }
1180 |
1181 | dissector_handle_t
1182 | http_upgrade_dissector(const char *protocol) {
1183 | return dissector_get_string_handle(upgrade_subdissector_table, protocol);
1184 | }
1185 |
1186 | static const char *
1187 | http_get_header_value(packet_info* pinfo, const char *name, bool_Bool the_other_direction) {
1188 | conversation_t* conv = find_or_create_conversation(pinfo);
1189 | const http_conv_t *conv_data = (http_conv_t *)conversation_get_proto_data(conv, proto_http);
1190 | if (conv_data) {
1191 | const http_req_res_t *req_res = conv_data->req_res_tail;
1192 | if (req_res && req_res->private_data) {
1193 | const http_req_res_private_data_t *private = (http_req_res_private_data_t *)req_res->private_data;
1194 | if (private) {
1195 | wmem_map_t *headers = (conv_data->server_port == pinfo->destport && the_other_direction) || (
1196 | conv_data->server_port == pinfo->srcport && !the_other_direction)
1197 | ? private->response_headers
1198 | : private->request_headers;
1199 | if (headers) {
1200 | return wmem_map_lookup(headers, name);
1201 | }
1202 | }
1203 | }
1204 | }
1205 | return NULL((void*)0);
1206 | }
1207 |
1208 | static int
1209 | dissect_http_message(tvbuff_t *tvb, unsigned offset, packet_info *pinfo,
1210 | proto_tree *tree, http_conv_t *conv_data,
1211 | const char* proto_tag, int proto, bool_Bool end_of_stream,
1212 | const uint32_t* const seq)
1213 | {
1214 | proto_tree *http_tree = NULL((void*)0);
1215 | proto_item *ti = NULL((void*)0);
1216 | proto_item *hidden_item;
1217 | const unsigned char *line, *firstline;
1218 | unsigned next_offset;
1219 | const unsigned char *linep, *lineend;
1220 | unsigned orig_offset = offset;
1221 | unsigned first_linelen, linelen;
1222 | bool_Bool is_request_or_reply, is_tls = false0;
1223 | bool_Bool saw_req_resp_or_header;
1224 | media_container_type_t http_type;
1225 | proto_item *hdr_item = NULL((void*)0);
1226 | ReqRespDissector reqresp_dissector;
1227 | proto_tree *req_tree;
1228 | unsigned colon_offset;
1229 | headers_t *headers = NULL((void*)0);
1230 | unsigned datalen;
1231 | int reported_datalen = -1;
1232 | dissector_handle_t handle = NULL((void*)0);
1233 | bool_Bool dissected = false0;
1234 | bool_Bool first_loop = true1;
1235 | bool_Bool have_seen_http = false0;
1236 | /*unsigned i;*/
1237 | /*http_info_value_t *si;*/
1238 | http_eo_t *eo_info;
1239 | heur_dtbl_entry_t *hdtbl_entry;
1240 | int reported_length;
1241 | uint16_t word;
1242 | bool_Bool leading_crlf = false0;
1243 | bool_Bool excess_data = false0;
1244 | media_content_info_t* content_info = NULL((void*)0);
1245 | wmem_map_t* header_value_map = NULL((void*)0);
1246 | int chunk_offset = 0;
1247 | wmem_map_t *chunk_map = NULL((void*)0);
1248 | wmem_allocator_t *header_value_map_allocator = NULL((void*)0);
1249 |
1250 | /*
1251 | * Originally this dissector only saved the header information (both in
1252 | * headers and header_value_map) in pinfo->pool scoped data, passing it
1253 | * to the (reassembled, if necessary) body contained in the message.
1254 | *
1255 | * Some protocols use the chunked transfer method to streaming data;
1256 | * the headers are not repeated before each chunk but some dissectors
1257 | * want the headers when dissecting each chunk (instead of saving the
1258 | * headers themselves when called for the first chunk.) So in that
1259 | * case the headers are saved in file scoped memory.
1260 | *
1261 | * Other protocols use the HTTP Upgrade mechanism; at least the first
1262 | * frame for the upgrade protocol (which is likely after the response
1263 | * that confirms the upgrade) will need a copy of the headers (likely
1264 | * the response header and probably the request as well.) In that case
1265 | * we also need to save the headers in file scoped memory.
1266 | *
1267 | * The current implementation saves the headers in file scoped memory
1268 | * for all request/response pairs (but not for stray headers outside
1269 | * of a request/response pair, often in fuzzed data.) It probably only
1270 | * needs to do so for the above two cases, which could mean initially
1271 | * allocating a map in pinfo->pool scope and then copying its contents
1272 | * to file scope after an Upgrade header is found in order to prevent
1273 | * memory consumption from growing over time for captures with HTTP
1274 | * that does *not* use Upgrade or streaming chunked transfer method.
1275 | * (For HTTP Upgrade both the request and response should have Upgrade
1276 | * headers.)
1277 | */
1278 |
1279 | /*
1280 | * For supporting dissecting chunked data in streaming reassembly mode.
1281 | *
1282 | * If a HTTP request or response is chunked encoding (the transfer-encoding
1283 | * header is 'chunked') and its content-type matching a subdissector in
1284 | * "streaming_content_type" dissector table, then we switch to dissect in
1285 | * streaming chunk mode. In streaming chunk mode, we dissect the data as soon
1286 | * as possible, unlike normal mode, we don't start reassembling until the end
1287 | * of the request or response message or at the end of the TCP stream. In
1288 | * streaming chunk mode, the first reassembled PDU contains HTTP headers
1289 | * and at least one completed chunk of this request or response message. And
1290 | * subsequent PDUs consist of one or more chunks:
1291 | *
1292 | * ----- +-- Reassembled Streaming Content PDU(s) --+-- Reassembled Streaming Content PDU(s) --+--- Reassembled ...
1293 | * HLProtos | 1*high-proto-pdu | 1*high-proto-pdu | 1*high-proto-pdu
1294 | * ----- +-------------------------------------+----+--------------------------------+---------+-------------------
1295 | * | de-chunked-data | de-chunked-data | de-chunked-data
1296 | * HTTP +-------- First Reassembled HTTP PDU -----------+--- Second Reassembled HTTP PDU -----+- Third PDU -+ +- Fourth ---
1297 | * | headers and 1*chunk | 1*chunk | 1*chunk | | 1*chunk ...
1298 | * ----- +--------- TCP segment ---------+ +-----------TCP segment -----------+ +---- TCP segment ---------+ +------------
1299 | * TCP | headers | *chunk | part-chunk | | part-chunk | *chunk | part-chunk | | part-chunk | 1*chunk | | 1*chunk ...
1300 | * ----- +---------+--------+------------+ +------------+--------+------------+ +------------+-------------+ +------------
1301 | *
1302 | * Notation:
1303 | * - headers HTTP headers of a request or response message.
1304 | * - part-chunk The front or rear part of a HTTP chunk.
1305 | * - *chunk Zero or more completed HTTP chunks of a HTTP message.
1306 | * - 1*chunk One or more completed HTTP chunks of a HTTP message.
1307 | * - de-chunked-data De-chunked HTTP body data based on one or more completed chunks.
1308 | * - 1*high-proto-pdu One or more high level protocol (on top of HTTP) PDUs.
1309 | * - HLProtos High Level Protocols like GRPC-Web.
1310 | *
1311 | * The headers and content_info of the req_res are allocated in file scope that
1312 | * helps to provide information for dissecting subsequent PDUs which only
1313 | * contains chunks without headers.
1314 | */
1315 | bool_Bool streaming_chunk_mode = false0;
1316 | bool_Bool begin_with_chunk = false0;
1317 | http_streaming_reassembly_data_t* streaming_reassembly_data = NULL((void*)0);
1318 |
1319 | http_req_res_t *curr = (http_req_res_t *)p_get_proto_data(wmem_file_scope(), pinfo, proto_http, HTTP_PROTO_DATA_REQRES0);
1320 | http_info_value_t *stat_info = NULL((void*)0);
1321 | http_req_res_private_data_t* prv_data = curr ? (http_req_res_private_data_t*)curr->private_data : NULL((void*)0);
1322 | http_req_res_private_data_t* tail_prv_data = NULL((void*)0);
1323 |
1324 | /* Determine the direction as in the TCP dissector, but don't call
1325 | * get_tcp_conversation_data because we don't want to create a new
1326 | * TCP stream if it doesn't exist (e.g., SSDP over UDP.)
1327 | */
1328 | int direction = cmp_address(&pinfo->src, &pinfo->dst);
1329 | /* if the addresses are equal, match the ports instead */
1330 | if (direction == 0) {
1331 | direction = (pinfo->srcport > pinfo->destport) ? 1 : -1;
1332 | }
1333 | if (direction >= 0) {
1334 | chunk_map = conv_data->chunk_offsets_fwd;
1335 | } else {
1336 | chunk_map = conv_data->chunk_offsets_rev;
1337 | }
1338 |
1339 | if (seq && chunk_map) {
1340 | chunk_offset = GPOINTER_TO_INT(wmem_map_lookup(chunk_map, GUINT_TO_POINTER(*seq)))((gint) (glong) (wmem_map_lookup(chunk_map, ((gpointer) (gulong ) (*seq)))));
1341 | /* Returns 0 when there is no entry in the map, as we want. */
1342 | }
1343 |
1344 | reported_length = tvb_reported_length_remaining(tvb, offset);
1345 | if (reported_length < 1) {
1346 | return -1;
1347 | }
1348 |
1349 | /* RFC 2616
1350 | * In the interest of robustness, servers SHOULD ignore any empty
1351 | * line(s) received where a Request-Line is expected. In other words, if
1352 | * the server is reading the protocol stream at the beginning of a
1353 | * message and receives a CRLF first, it should ignore the CRLF.
1354 | */
1355 | if (reported_length > 3) {
1356 | word = tvb_get_ntohs(tvb,offset);
1357 | if (word == 0x0d0a) {
1358 | leading_crlf = true1;
1359 | offset += 2;
1360 | }
1361 | }
1362 |
1363 | /*
1364 | * If we previously dissected an HTTP request in this conversation then
1365 | * we should be pretty sure that whatever we got in this TVB is
1366 | * actually HTTP (even if what we have here is part of a file being
1367 | * transferred over HTTP).
1368 | */
1369 | if (conv_data->req_res_tail)
1370 | have_seen_http = true1;
1371 |
1372 | /*
1373 | * If this is binary data then there's no point in doing all the string
1374 | * operations below: they'll just be slow on this data.
1375 | */
1376 | if (!g_ascii_isprint(tvb_get_uint8(tvb, offset))((g_ascii_table[(guchar) (tvb_get_uint8(tvb, offset))] & G_ASCII_PRINT ) != 0)) {
1377 | /*
1378 | * But, if we've seen some real HTTP then we're sure this is
1379 | * an HTTP conversation, and this is binary file data.
1380 | * Mark it as such.
1381 | */
1382 | if (have_seen_http) {
1383 | tvbuff_t *next_tvb;
1384 | int data_len;
1385 |
1386 | col_set_str(pinfo->cinfo, COL_PROTOCOL, proto_tag);
1387 | col_set_str(pinfo->cinfo, COL_INFO, "Continuation");
1388 | ti = proto_tree_add_item(tree, proto, tvb, offset, -1, ENC_NA0x00000000);
1389 | http_tree = proto_item_add_subtree(ti, ett_http);
1390 |
1391 | next_tvb = tvb_new_subset_remaining(tvb, orig_offset);
1392 | /* If orig_offset > 0, this isn't the first message
1393 | * dissected in this TCP segment, which means we had
1394 | * a Content-Length, but more data after that body.
1395 | */
1396 | if (orig_offset > 0) {
1397 | proto_tree_add_expert(http_tree, pinfo, &ei_http_excess_data, next_tvb, 0, tvb_captured_length(next_tvb));
1398 | }
1399 | /* Send it to Follow HTTP Stream and mark as file data */
1400 | if(have_tap_listener(http_follow_tap)) {
1401 | tap_queue_packet(http_follow_tap, pinfo, next_tvb);
1402 | }
1403 | data_len = tvb_captured_length(next_tvb);
1404 | proto_tree_add_bytes_format_value(http_tree, hf_http_file_data,
1405 | next_tvb, 0, data_len, NULL((void*)0), "%u byte%s", data_len, plurality(data_len, "", "s")((data_len) == 1 ? ("") : ("s")));
1406 | call_data_dissector(next_tvb, pinfo, http_tree);
1407 | }
1408 | return -1;
1409 | }
1410 |
1411 | /*
1412 | * Is this a request or response?
1413 | *
1414 | * Note that "tvb_find_line_end_length()" will return a value that
1415 | * is not longer than what's in the buffer, so the
1416 | * "tvb_get_ptr()" call won't throw an exception.
1417 | */
1418 | bool_Bool lind_end_found = tvb_find_line_end_length(tvb, offset,
1419 | tvb_ensure_captured_length_remaining(tvb, offset), &first_linelen , &next_offset);
1420 |
1421 | if (!lind_end_found) {
1422 | /* No complete line was found in this segment, do
1423 | * desegmentation if we're told to.
1424 | */
1425 | if (!req_resp_hdrs_do_reassembly(tvb, offset, pinfo,
1426 | http_desegment_headers, http_desegment_body, false0, &chunk_offset,
1427 | streaming_content_type_dissector_table, &handle)) {
1428 | /*
1429 | * More data needed for desegmentation.
1430 | */
1431 | return -1;
1432 | }
1433 | }
1434 |
1435 | if (!PINFO_FD_VISITED(pinfo)((pinfo)->fd->visited) && conv_data->req_res_tail && conv_data->req_res_tail->private_data) {
1436 | tail_prv_data = (http_req_res_private_data_t*) conv_data->req_res_tail->private_data;
1437 | }
1438 |
1439 | /* Check whether the first line is the beginning of a chunk. If it is the beginning
1440 | * of a chunk, the headers and at least one chunk of HTTP request or response should
1441 | * be dissected in the previous packets, and now we are processing subsequent chunks.
1442 | */
1443 | if (http_desegment_body && http_dechunk_body) {
1444 | begin_with_chunk = starts_with_chunk_size(tvb, offset, pinfo);
1445 |
1446 | if (begin_with_chunk &&
1447 | ((prv_data && ( /* This packet has been parsed */
1448 | /* and now we are in a HTTP request chunk stream */
1449 | (prv_data->req_fwd_flow == direction && prv_data->req_streaming_reassembly_data) ||
1450 | /* and now we are in a HTTP response chunk stream */
1451 | (prv_data->req_fwd_flow != direction && prv_data->res_streaming_reassembly_data)))
1452 | ||
1453 | (tail_prv_data && ( /* This packet has not been parsed and headers info in conv_data->req_res_tail */
1454 | /* and now we are in a HTTP request chunk stream */
1455 | (tail_prv_data->req_fwd_flow == direction && tail_prv_data->req_streaming_reassembly_data) ||
1456 | /* and now we are in a HTTP response chunk stream */
1457 | (tail_prv_data->req_fwd_flow != direction && tail_prv_data->res_streaming_reassembly_data)))))
1458 | {
1459 | streaming_chunk_mode = true1;
1460 | }
1461 | }
1462 |
1463 | /*
1464 | * Is the first line a request or response?
1465 | * Note that "tvb_find_line_end_length()" will return a value that
1466 | * is not longer than what's in the buffer, so the
1467 | * "tvb_get_ptr()" call won't throw an exception.
1468 | */
1469 | firstline = tvb_get_ptr(tvb, offset, first_linelen);
1470 | http_type = MEDIA_CONTAINER_HTTP_OTHERS; /* type not known yet */
1471 | is_request_or_reply = is_http_request_or_reply(pinfo, (const char *)firstline,
1472 | first_linelen, &http_type, NULL((void*)0), conv_data);
1473 | if (is_request_or_reply || streaming_chunk_mode) {
1474 | bool_Bool try_desegment_body;
1475 |
1476 | if (streaming_chunk_mode && begin_with_chunk) {
1477 | col_set_str(pinfo->cinfo, COL_INFO, "Chunk Stream ");
1478 | } else {
1479 | /*
1480 | * Yes, it's a request or response.
1481 | * Put the first line from the buffer into the summary
1482 | * (but leave out the line terminator).
1483 | */
1484 | col_add_fstr(pinfo->cinfo, COL_INFO, "%s ", format_text(pinfo->pool, (char*)firstline, first_linelen));
1485 | }
1486 |
1487 | /*
1488 | * Do header desegmentation if we've been told to,
1489 | * and do body desegmentation if we've been told to and
1490 | * we find a Content-Length header in requests.
1491 | *
1492 | * The following cases (from RFC 7230, Section 3.3) never have a
1493 | * response body, so do not attempt to desegment the body for:
1494 | * * Responses to HEAD requests.
1495 | * * 2xx responses to CONNECT requests.
1496 | * * 1xx, 204 No Content, 304 Not Modified responses.
1497 | *
1498 | * Additionally if we are at the end of stream, no more segments
1499 | * will be added so disable body segmentation too in that case.
1500 | */
1501 | try_desegment_body = (http_desegment_body && !end_of_stream);
1502 | if (try_desegment_body && http_type == MEDIA_CONTAINER_HTTP_RESPONSE && !streaming_chunk_mode) {
1503 | /*
1504 | * The response_code is not yet set, so extract
1505 | * the response code from the current line.
1506 | */
1507 | int response_code = parse_http_status_code(firstline, firstline + first_linelen);
1508 | /*
1509 | * On a second pass, we should have already associated
1510 | * the response with the request. On a first sequential
1511 | * pass, we haven't done so yet (as we don't know if we
1512 | * need more data), so get the request method from the
1513 | * most recent request, if it exists.
1514 | */
1515 | char* request_method = NULL((void*)0);
1516 | if (curr) {
1517 | request_method = curr->request_method;
1518 | } else if (!PINFO_FD_VISITED(pinfo)((pinfo)->fd->visited) && conv_data->req_res_tail) {
1519 | request_method = conv_data->req_res_tail->request_method;
1520 | }
1521 | if ((g_strcmp0(request_method, "HEAD") == 0 ||
1522 | (response_code / 100 == 2 &&
1523 | (g_strcmp0(request_method, "CONNECT") == 0 ||
1524 | g_strcmp0(request_method, "SSTP_DUPLEX_POST") == 0)) ||
1525 | response_code / 100 == 1 ||
1526 | response_code == 204 ||
1527 | response_code == 304)) {
1528 | /* No response body is present. */
1529 | try_desegment_body = false0;
1530 | }
1531 | }
1532 | if (!req_resp_hdrs_do_reassembly(tvb, offset, pinfo,
1533 | http_desegment_headers, try_desegment_body, http_type == MEDIA_CONTAINER_HTTP_RESPONSE, &chunk_offset,
1534 | streaming_content_type_dissector_table, &handle)) {
1535 | /*
1536 | * More data needed for desegmentation.
1537 | */
1538 | if (seq && chunk_map && chunk_offset) {
1539 | wmem_map_insert(chunk_map, GUINT_TO_POINTER(*seq)((gpointer) (gulong) (*seq)), GINT_TO_POINTER(chunk_offset)((gpointer) (glong) (chunk_offset)));
1540 | }
1541 | return -1;
1542 | }
1543 |
1544 | if (handle && http_desegment_body && http_dechunk_body) {
1545 | /* This handle is set because there is a header 'Transfer-Encoding: chunked', and
1546 | * a streaming mode reassembly supported subdissector is found according to the
1547 | * header of Content-Type.
1548 | */
1549 | streaming_chunk_mode = true1;
1550 | }
1551 | } else if (have_seen_http) {
1552 | /*
1553 | * If we know this is HTTP then call it continuation.
1554 | */
1555 | /* If orig_offset > 0, this isn't the first message dissected
1556 | * in this segment, which means we had a Content-Length, but
1557 | * more data after the body. If this isn't a request or reply,
1558 | * that's bogus, and probably means the Content-Length was
1559 | * wrong.
1560 | */
1561 | if (orig_offset > 0) {
1562 | excess_data = true1;
1563 | }
1564 | col_set_str(pinfo->cinfo, COL_INFO, "Continuation");
1565 | }
1566 |
1567 | if (is_request_or_reply || have_seen_http || streaming_chunk_mode) {
1568 | /*
1569 | * Now set COL_PROTOCOL and create the http tree for the
1570 | * cases where we set COL_INFO above.
1571 | */
1572 | col_set_str(pinfo->cinfo, COL_PROTOCOL, proto_tag);
1573 | ti = proto_tree_add_item(tree, proto, tvb, offset, -1, ENC_NA0x00000000);
1574 | http_tree = proto_item_add_subtree(ti, ett_http);
1575 |
1576 | if (leading_crlf) {
1577 | proto_tree_add_expert(http_tree, pinfo, &ei_http_leading_crlf, tvb, offset-2, 2);
1578 | }
1579 | if (excess_data) {
1580 | proto_tree_add_expert(http_tree, pinfo, &ei_http_excess_data, tvb, offset, tvb_captured_length_remaining(tvb, offset));
1581 | }
1582 | }
1583 |
1584 | is_tls = proto_is_frame_protocol(pinfo->layers, "tls");
1585 |
1586 | if (!PINFO_FD_VISITED(pinfo)((pinfo)->fd->visited) && begin_with_chunk
1587 | && streaming_chunk_mode && conv_data->req_res_tail) {
1588 | /* point this packet beginning with a chunk to req_res info created in previous packet. */
1589 | curr = conv_data->req_res_tail;
1590 | prv_data = (http_req_res_private_data_t*)curr->private_data;
1591 | p_set_proto_data(wmem_file_scope(), pinfo, proto_http, HTTP_PROTO_DATA_REQRES0, curr);
1592 | }
1593 |
1594 | if (prv_data) {
1595 | if (prv_data->req_fwd_flow == direction && prv_data->req_streaming_reassembly_data) {
1596 | /* in request flow */
1597 | streaming_reassembly_data = prv_data->req_streaming_reassembly_data;
1598 | } else if (prv_data->req_fwd_flow != direction && prv_data->res_streaming_reassembly_data) {
1599 | /* in response flow */
1600 | streaming_reassembly_data = prv_data->res_streaming_reassembly_data;
1601 | }
1602 |
1603 | if (streaming_reassembly_data) {
1604 | streaming_chunk_mode = true1;
1605 | headers = streaming_reassembly_data->main_headers;
1606 | handle = streaming_reassembly_data->streaming_handle;
1607 | content_info = streaming_reassembly_data->content_info;
1608 | header_value_map = (wmem_map_t*) content_info->data;
1609 | header_value_map_allocator = wmem_file_scope();
1610 | }
1611 | }
1612 |
1613 | // Ensure headers is valid before the `goto dissecting_body` below.
1614 | if (headers == NULL((void*)0)) {
1615 | DISSECTOR_ASSERT_HINT(!PINFO_FD_VISITED(pinfo) || (PINFO_FD_VISITED(pinfo) && !streaming_chunk_mode),((void) ((!((pinfo)->fd->visited) || (((pinfo)->fd-> visited) && !streaming_chunk_mode)) ? (void)0 : (proto_report_dissector_bug ("%s:%u: failed assertion \"%s\" (%s)", "epan/dissectors/packet-http.c" , 1616, "!((pinfo)->fd->visited) || (((pinfo)->fd->visited) && !streaming_chunk_mode)" , "The headers variable should not be NULL if it is in streaming mode during a non first scan." ))))
1616 | "The headers variable should not be NULL if it is in streaming mode during a non first scan.")((void) ((!((pinfo)->fd->visited) || (((pinfo)->fd-> visited) && !streaming_chunk_mode)) ? (void)0 : (proto_report_dissector_bug ("%s:%u: failed assertion \"%s\" (%s)", "epan/dissectors/packet-http.c" , 1616, "!((pinfo)->fd->visited) || (((pinfo)->fd->visited) && !streaming_chunk_mode)" , "The headers variable should not be NULL if it is in streaming mode during a non first scan." ))));
1617 | DISSECTOR_ASSERT_HINT(header_value_map == NULL, "The header_value_map variable should be NULL while headers is NULL.")((void) ((header_value_map == ((void*)0)) ? (void)0 : (proto_report_dissector_bug ("%s:%u: failed assertion \"%s\" (%s)", "epan/dissectors/packet-http.c" , 1617, "header_value_map == ((void*)0)", "The header_value_map variable should be NULL while headers is NULL." ))));
1618 |
1619 | headers = wmem_new0((streaming_chunk_mode ? wmem_file_scope() : pinfo->pool), headers_t)((headers_t*)wmem_alloc0(((streaming_chunk_mode ? wmem_file_scope () : pinfo->pool)), sizeof(headers_t)));
1620 | if (streaming_chunk_mode) {
1621 | header_value_map_allocator = wmem_file_scope();
1622 | header_value_map = wmem_map_new(header_value_map_allocator, g_str_hash, g_str_equal);
1623 | }
1624 | }
1625 |
1626 | if (streaming_chunk_mode && begin_with_chunk) {
1627 | datalen = reported_length;
1628 | goto dissecting_body;
1629 | }
1630 |
1631 | stat_info = wmem_new(pinfo->pool, http_info_value_t)((http_info_value_t*)wmem_alloc((pinfo->pool), sizeof(http_info_value_t )));
1632 | stat_info->framenum = pinfo->num;
1633 | stat_info->response_code = 0;
1634 | stat_info->request_method = NULL((void*)0);
1635 | stat_info->request_uri = NULL((void*)0);
1636 | stat_info->referer_uri = NULL((void*)0);
1637 | stat_info->http_host = NULL((void*)0);
1638 | stat_info->full_uri = NULL((void*)0);
1639 | stat_info->location_target = NULL((void*)0);
1640 | stat_info->location_base_uri = NULL((void*)0);
1641 | p_set_proto_data(pinfo->pool, pinfo, proto_http, HTTP_PROTO_DATA_INFO1, (void *)stat_info);
1642 |
1643 | /*
1644 | * Process the packet data, a line at a time.
1645 | */
1646 | http_type = MEDIA_CONTAINER_HTTP_OTHERS; /* type not known yet */
1647 |
1648 | saw_req_resp_or_header = false0; /* haven't seen anything yet */
1649 | while (tvb_offset_exists(tvb, offset)) {
1650 | /*
1651 | * Find the end of the line.
1652 | * XXX - what if we don't find it because the packet
1653 | * is cut short by a snapshot length or the header is
1654 | * split across TCP segments? How much dissection should
1655 | * we do on it?
1656 | */
1657 | bool_Bool linelen_found = tvb_find_line_end_length(tvb, offset,
1658 | tvb_ensure_captured_length_remaining(tvb, offset), &linelen ,&next_offset);
1659 | if (!linelen_found)
1660 | return -1;
1661 |
1662 | /*
1663 | * Get a buffer that refers to the line.
1664 | *
1665 | * Note that "tvb_find_line_end_length()" will return a value that
1666 | * is not longer than what's in the buffer, so the
1667 | * "tvb_get_ptr()" call won't throw an exception.
1668 | */
1669 | line = tvb_get_ptr(tvb, offset, linelen);
1670 | lineend = line + linelen;
1671 | colon_offset = -1;
1672 |
1673 | /*
1674 | * OK, does it look like an HTTP request or response?
1675 | */
1676 | reqresp_dissector = NULL((void*)0);
1677 | is_request_or_reply =
1678 | is_http_request_or_reply(pinfo, (const char *)line,
1679 | linelen, &http_type, &reqresp_dissector, conv_data);
1680 | if (is_request_or_reply)
1681 | goto is_http;
1682 |
1683 | /*
1684 | * No. Does it look like a blank line (as would appear
1685 | * at the end of an HTTP request)?
1686 | */
1687 | if (linelen == 0)
1688 | goto is_http; /* Yes. */
1689 |
1690 | /*
1691 | * No. Does it look like a header?
1692 | */
1693 | colon_offset = offset;
1694 |
1695 | linep = (const unsigned char *)memchr(line, ':', linelen);
1696 | if (linep) {
1697 | /*
1698 | * Colon found, assume it is a header if we've seen a
1699 | * valid line before. Check a little more if not.
1700 | */
1701 | if (saw_req_resp_or_header || valid_header_name(line, (int)(linep - line))) {
1702 | colon_offset += (int)(linep - line);
1703 | if (http_check_ascii_headers) {
1704 | unsigned i;
1705 | for (i = 0; i < linelen; i++) {
1706 | if (line[i] & 0x80) {
1707 | /*
1708 | * Non-ASCII! Return -2 for invalid
1709 | * HTTP, distinct from -1 for possible
1710 | * reassembly required.
1711 | */
1712 | return -2;
1713 | }
1714 | }
1715 | }
1716 | goto is_http;
1717 | }
1718 | }
1719 |
1720 | /*
1721 | * We haven't seen the colon yet.
1722 | *
1723 | * If we've already seen an HTTP request or response
1724 | * line, or a header line, and we're at the end of
1725 | * the tvbuff, we assume this is an incomplete header
1726 | * line. (We quit this loop after seeing a blank line,
1727 | * so if we've seen a request or response line, or a
1728 | * header line, this is probably more of the request
1729 | * or response we're presumably seeing. There is some
1730 | * risk of false positives, but the same applies for
1731 | * full request or response lines or header lines,
1732 | * although that's less likely.)
1733 | *
1734 | * We throw an exception in that case, by checking for
1735 | * the existence of the next byte after the last one
1736 | * in the line. If it exists, "tvb_ensure_bytes_exist()"
1737 | * throws no exception, and we fall through to the
1738 | * "not HTTP" case. If it doesn't exist,
1739 | * "tvb_ensure_bytes_exist()" will throw the appropriate
1740 | * exception.
1741 | */
1742 | if (saw_req_resp_or_header)
1743 | tvb_ensure_bytes_exist(tvb, offset, linelen + 1);
1744 |
1745 | /*
1746 | * We don't consider this part of an HTTP request or
1747 | * reply, so we don't display it.
1748 | * (Yeah, that means we don't display, say, a text/http
1749 | * page, but you can get that from the data pane.)
1750 | */
1751 | break;
1752 |
1753 | is_http:
1754 | if ((tree) && (http_tree == NULL((void*)0))) {
1755 | ti = proto_tree_add_item(tree, proto, tvb, orig_offset, -1, ENC_NA0x00000000);
1756 | http_tree = proto_item_add_subtree(ti, ett_http);
1757 | if (leading_crlf) {
1758 | proto_tree_add_expert(http_tree, pinfo, &ei_http_leading_crlf, tvb, orig_offset-2, 2);
1759 | }
1760 | }
1761 |
1762 | if (first_loop && !is_tls && pinfo->ptype == PT_TCP &&
1763 | (pinfo->srcport == 443 || pinfo->destport == 443)) {
1764 | expert_add_info(pinfo, ti, &ei_http_tls_port);
1765 | }
1766 |
1767 | first_loop = false0;
1768 |
1769 | /*
1770 | * Process this line.
1771 | */
1772 |
1773 | if (linelen == 0) {
1774 | /*
1775 | * This is a blank line, which means that
1776 | * whatever follows it isn't part of this
1777 | * request or reply.
1778 | */
1779 | proto_tree_add_format_text(http_tree, tvb, offset, next_offset - offset);
1780 | offset = next_offset;
1781 | break;
1782 | }
1783 |
1784 | /*
1785 | * Not a blank line - either a request, a reply, or a header
1786 | * line.
1787 | */
1788 | saw_req_resp_or_header = true1;
1789 | if (is_request_or_reply) {
1790 | char *text = tvb_format_text(pinfo->pool, tvb, offset, next_offset - offset);
1791 |
1792 | req_tree = proto_tree_add_subtree(http_tree, tvb,
1793 | offset, next_offset - offset, ett_http_request, &hdr_item, text);
1794 |
1795 | if (!PINFO_FD_VISITED(pinfo)((pinfo)->fd->visited)) {
1796 | if (header_value_map_allocator != wmem_file_scope()) {
1797 | /*
1798 | * If we already have a header_value_map allocated
1799 | * with pinfo->pool scope, that means we saw a
1800 | * field-line followed by a start line in the same
1801 | * message; that's bogus, so we shouldn't need to
1802 | * worry about passing the previous "headers" to a
1803 | * next dissector, so it's okay to drop the map.
1804 | */
1805 | header_value_map_allocator = wmem_file_scope();
1806 | header_value_map = wmem_map_new(header_value_map_allocator, g_str_hash, g_str_equal);
1807 | }
1808 | if (http_type == MEDIA_CONTAINER_HTTP_REQUEST) {
1809 | curr = push_req(conv_data, pinfo);
1810 | curr->request_method = wmem_strdup(wmem_file_scope(), stat_info->request_method);
1811 | prv_data = curr->private_data;
1812 | prv_data->req_fwd_flow = direction;
1813 | prv_data->request_headers = header_value_map;
1814 | } else if (http_type == MEDIA_CONTAINER_HTTP_RESPONSE) {
1815 | curr = push_res(conv_data, pinfo);
1816 | prv_data = curr->private_data;
1817 | prv_data->req_fwd_flow = -direction;
1818 | prv_data->response_headers = header_value_map;
1819 | }
1820 | }
1821 | if (reqresp_dissector) {
1822 | reqresp_dissector(pinfo, tvb, req_tree, offset, line,
1823 | lineend, conv_data, curr);
1824 | }
1825 | } else {
1826 | /*
1827 | * Header.
1828 | */
1829 | if (header_value_map == NULL((void*)0) && conv_data->req_res_tail) {
1830 | prv_data = (http_req_res_private_data_t*)conv_data->req_res_tail->private_data;
1831 | if (prv_data) {
1832 | header_value_map_allocator = wmem_file_scope();
1833 | if (prv_data->req_fwd_flow == direction) {
1834 | header_value_map = prv_data->request_headers;
1835 | } else {
1836 | header_value_map = prv_data->response_headers;
1837 | }
1838 | }
1839 | }
1840 | if (header_value_map == NULL((void*)0)) {
1841 | /*
1842 | * We are seeing a header but have not tracked request or response, so we don't know
1843 | * direction of this header, so not going to keep track of it
1844 | */
1845 | header_value_map_allocator = pinfo->pool;
1846 | header_value_map = wmem_map_new(header_value_map_allocator, g_str_hash, g_str_equal);
1847 | }
1848 | bool_Bool good_header = process_header(tvb, offset, next_offset, line, linelen,
1849 | colon_offset, pinfo, http_tree, headers, conv_data, http_type, header_value_map,
1850 | header_value_map_allocator, streaming_chunk_mode);
1851 | if (http_check_ascii_headers && !good_header) {
1852 | /*
1853 | * Line is not a good HTTP header.
1854 | * Return -2 to mark as invalid HTTP;
1855 | * this is distinct from returning -1 when
1856 | * it may be HTTP but in need of reassembly.
1857 | */
1858 | return -2;
1859 | }
1860 | }
1861 | offset = next_offset;
1862 | }
1863 | if (stat_info->http_host && stat_info->request_uri) {
1864 | char *uri;
1865 |
1866 | if ((g_ascii_strncasecmp(stat_info->request_uri, "http://", 7) == 0) ||
1867 | (g_ascii_strncasecmp(stat_info->request_uri, "https://", 8) == 0) ||
1868 | (g_ascii_strncasecmp(stat_info->request_method, "CONNECT", 7) == 0)) {
1869 | uri = wmem_strdup(pinfo->pool, stat_info->request_uri);
1870 | }
1871 | else {
1872 | uri = wmem_strdup_printf(pinfo->pool, "%s://%s%s",
1873 | is_tls ? "https" : "http",
1874 | g_strstrip(wmem_strdup(pinfo->pool, stat_info->http_host))g_strchomp (g_strchug (wmem_strdup(pinfo->pool, stat_info-> http_host))), stat_info->request_uri);
1875 | }
1876 | stat_info->full_uri = wmem_strdup(pinfo->pool, uri);
1877 | if (!PINFO_FD_VISITED(pinfo)((pinfo)->fd->visited) && curr) {
1878 | curr->full_uri = wmem_strdup(wmem_file_scope(), uri);
1879 | }
1880 | }
1881 | else {
1882 | /* If the request has a range, this is, or potentially is, asynchronous I/O thus
1883 | * full_uri must be reinitialized because it is set to that of the last request. */
1884 | if (curr && curr->req_has_range)
1885 | curr->full_uri = NULL((void*)0);
1886 | }
1887 | if (tree) {
1888 | proto_item *pi;
1889 |
1890 | switch (http_type) {
1891 |
1892 | case MEDIA_CONTAINER_HTTP_NOTIFICATION:
1893 | hidden_item = proto_tree_add_boolean(http_tree,
1894 | hf_http_notification, tvb, 0, 0, 1);
1895 | proto_item_set_hidden(hidden_item);
1896 | break;
1897 |
1898 | case MEDIA_CONTAINER_HTTP_RESPONSE:
1899 | hidden_item = proto_tree_add_boolean(http_tree,
1900 | hf_http_response, tvb, 0, 0, 1);
1901 | proto_item_set_hidden(hidden_item);
1902 |
1903 | match_trans_t *match_trans = NULL((void*)0);
1904 |
1905 | if (curr && curr->response_code == 206 && curr->resp_has_range) {
1906 | /* The conv_data->matches_table is only used for GET requests with ranges and
1907 | * response_codes of 206 (Partial Content). (Note: only GETs use ranges.)
1908 | */
1909 | match_trans = (match_trans_t *)wmem_map_lookup(conv_data->matches_table,
1910 | GUINT_TO_POINTER(pinfo->num)((gpointer) (gulong) (pinfo->num)));
1911 | if (match_trans) {
1912 | pi = proto_tree_add_uint(http_tree, hf_http_request_in, tvb, 0, 0,
1913 | match_trans->req_frame);
1914 | proto_item_set_generated(pi);
1915 |
1916 | pi = proto_tree_add_time(http_tree, hf_http_time, tvb, 0, 0,
1917 | &match_trans->delta_time);
1918 | proto_item_set_generated(pi);
1919 |
1920 | pi = proto_tree_add_string(http_tree, hf_http_request_uri, tvb, 0, 0,
1921 | match_trans->request_uri);
1922 | proto_item_set_generated(pi);
1923 | {
1924 | char *uri;
1925 | uri = wmem_strdup_printf(pinfo->pool, "%s://%s%s",
1926 | is_tls ? "https" : "http",
1927 | g_strstrip(wmem_strdup(pinfo->pool, match_trans->http_host))g_strchomp (g_strchug (wmem_strdup(pinfo->pool, match_trans ->http_host))), match_trans->request_uri);
1928 |
1929 | pi = proto_tree_add_string(http_tree, hf_http_request_full_uri, tvb, 0, 0,
1930 | uri);
1931 | proto_item_set_url(pi);
1932 | proto_item_set_generated(pi);
1933 | }
1934 | }
1935 | }
1936 |
1937 | /* If responses don't have a range, the I/O is synchronous in which case a request is
1938 | * matched with the following response. If a request or response is missing from the
1939 | * capture file, correct matching resumes at the next request. */
1940 | if(!match_trans
1941 | && curr
1942 | && !curr->resp_has_range
1943 | && curr->req_framenum) {
1944 | pi = proto_tree_add_uint(http_tree, hf_http_request_in, tvb, 0, 0, curr->req_framenum);
1945 | proto_item_set_generated(pi);
1946 |
1947 | if (! nstime_is_unset(&(curr->req_ts))) {
1948 | nstime_t delta;
1949 |
1950 | nstime_delta(&delta, &pinfo->abs_ts, &(curr->req_ts));
1951 | pi = proto_tree_add_time(http_tree, hf_http_time, tvb, 0, 0, &delta);
1952 | proto_item_set_generated(pi);
1953 | }
1954 | if (curr->request_uri) {
1955 | pi = proto_tree_add_string(http_tree, hf_http_request_uri, tvb, 0, 0,
1956 | curr->request_uri);
1957 | proto_item_set_generated(pi);
1958 | }
1959 | if (curr->full_uri) {
1960 | pi = proto_tree_add_string(http_tree, hf_http_request_full_uri, tvb, 0, 0,
1961 | curr->full_uri);
1962 | proto_item_set_url(pi);
1963 | proto_item_set_generated(pi);
1964 | }
1965 | }
1966 | break;
1967 | case MEDIA_CONTAINER_HTTP_REQUEST:
1968 | {
1969 | int size = wmem_map_size(conv_data->matches_table);
1970 |
1971 | hidden_item = proto_tree_add_boolean(http_tree, hf_http_request, tvb, 0, 0, 1);
1972 | proto_item_set_hidden(hidden_item);
1973 |
1974 | match_trans = NULL((void*)0);
1975 | if (curr) {
1976 | if (size > 0 && curr->req_has_range) {
1977 | match_trans = (match_trans_t *)wmem_map_lookup(conv_data->matches_table,
1978 | GUINT_TO_POINTER(pinfo->num)((gpointer) (gulong) (pinfo->num)));
1979 | if (match_trans) {
1980 | pi = proto_tree_add_uint(http_tree, hf_http_response_in,
1981 | tvb, 0, 0, match_trans->resp_frame);
1982 | proto_item_set_generated(pi);
1983 | }
1984 | }
1985 | else {
1986 | if(!match_trans
1987 | && !curr->resp_has_range
1988 | && curr->res_framenum) {
1989 | pi = proto_tree_add_uint(http_tree, hf_http_response_in, tvb, 0, 0, curr->res_framenum);
1990 | proto_item_set_generated(pi);
1991 |
1992 | }
1993 | }
1994 |
1995 | if (curr->full_uri) {
1996 | pi = proto_tree_add_string(http_tree, hf_http_request_full_uri, tvb, 0, 0,
1997 | curr->full_uri);
1998 | proto_item_set_url(pi);
1999 | proto_item_set_generated(pi);
2000 | }
2001 | else if (stat_info->full_uri){
2002 | pi = proto_tree_add_string(http_tree, hf_http_request_full_uri, tvb, 0, 0,
2003 | stat_info->full_uri);
2004 | proto_item_set_url(pi);
2005 | proto_item_set_generated(pi);
2006 | }
2007 | }
2008 | }
2009 | break;
2010 |
2011 | case MEDIA_CONTAINER_HTTP_OTHERS:
2012 | default:
2013 | break;
2014 | }
2015 | }
2016 |
2017 | /* Give the follow tap what we've currently dissected */
2018 | if(have_tap_listener(http_follow_tap)) {
2019 | tap_queue_packet(http_follow_tap, pinfo, tvb_new_subset_length(tvb, orig_offset, offset-orig_offset));
2020 | }
2021 |
2022 | reported_datalen = tvb_reported_length_remaining(tvb, offset);
2023 | datalen = tvb_captured_length_remaining(tvb, offset);
2024 |
2025 | /*
2026 | * If a content length was supplied, the amount of data to be
2027 | * processed as HTTP payload is the minimum of the content
2028 | * length and the amount of data remaining in the frame.
2029 | *
2030 | * If a message is received with both a Transfer-Encoding
2031 | * header field and a Content-Length header field, the latter
2032 | * MUST be ignored.
2033 | *
2034 | * If no content length was supplied (or if a bad content length
2035 | * was supplied), the amount of data to be processed is the amount
2036 | * of data remaining in the frame.
2037 | *
2038 | * If there was no Content-Length entity header, we should
2039 | * accumulate all data until the end of the connection.
2040 | * That'd require that the TCP dissector call subdissectors
2041 | * for all frames with FIN, even if they contain no data,
2042 | * which would require subdissectors to deal intelligently
2043 | * with empty segments.
2044 | *
2045 | * According to RFC 2616, however, 1xx responses, 204 responses,
2046 | * and 304 responses MUST NOT include a message body; if no
2047 | * content length is specified for them, we don't attempt to
2048 | * dissect the body.
2049 | *
2050 | * XXX - it says the same about responses to HEAD requests;
2051 | * unless there's a way to determine from the response
2052 | * whether it's a response to a HEAD request, we have to
2053 | * keep information about the request and associate that with
2054 | * the response in order to handle that.
2055 | */
2056 | if (headers->have_content_length &&
2057 | headers->transfer_encoding == HTTP_TE_NONE) {
2058 | if (datalen > headers->content_length)
2059 | datalen = (int)headers->content_length;
2060 |
2061 | /*
2062 | * XXX - limit the reported length in the tvbuff we'll
2063 | * hand to a subdissector to be no greater than the
2064 | * content length.
2065 | *
2066 | * We really need both unreassembled and "how long it'd
2067 | * be if it were reassembled" lengths for tvbuffs, so
2068 | * that we throw the appropriate exceptions for
2069 | * "not enough data captured" (running past the length),
2070 | * "packet needed reassembly" (within the length but
2071 | * running past the unreassembled length), and
2072 | * "packet is malformed" (running past the reassembled
2073 | * length).
2074 | */
2075 | if (reported_datalen > headers->content_length)
2076 | reported_datalen = (int)headers->content_length;
2077 | } else {
2078 | switch (http_type) {
2079 |
2080 | case MEDIA_CONTAINER_HTTP_REQUEST:
2081 | /*
2082 | * Requests have no content if there's no
2083 | * Content-Length header and no Transfer-Encoding
2084 | * header.
2085 | */
2086 | if (headers->transfer_encoding == HTTP_TE_NONE)
2087 | datalen = 0;
2088 | else
2089 | reported_datalen = -1;
2090 | break;
2091 |
2092 | case MEDIA_CONTAINER_HTTP_RESPONSE:
2093 | if ((stat_info->response_code/100) == 1 ||
2094 | stat_info->response_code == 204 ||
2095 | stat_info->response_code == 304)
2096 | datalen = 0; /* no content! */
2097 | else {
2098 | /*
2099 | * XXX - responses to HEAD requests,
2100 | * and possibly other responses,
2101 | * "MUST NOT" include a
2102 | * message-body.
2103 | */
2104 | reported_datalen = -1;
2105 | }
2106 | break;
2107 |
2108 | default:
2109 | /*
2110 | * XXX - what about MEDIA_CONTAINER_HTTP_NOTIFICATION?
2111 | */
2112 | reported_datalen = -1;
2113 | break;
2114 | }
2115 | }
2116 |
2117 | if (!PINFO_FD_VISITED(pinfo)((pinfo)->fd->visited) && streaming_chunk_mode && streaming_reassembly_data == NULL((void*)0)) {
2118 | DISSECTOR_ASSERT(!begin_with_chunk && handle && http_dechunk_body && http_desegment_body((void) ((!begin_with_chunk && handle && http_dechunk_body && http_desegment_body && headers->content_type && header_value_map) ? (void)0 : (proto_report_dissector_bug ("%s:%u: failed assertion \"%s\"", "epan/dissectors/packet-http.c" , 2119, "!begin_with_chunk && handle && http_dechunk_body && http_desegment_body && headers->content_type && header_value_map" ))))
2119 | && headers->content_type && header_value_map)((void) ((!begin_with_chunk && handle && http_dechunk_body && http_desegment_body && headers->content_type && header_value_map) ? (void)0 : (proto_report_dissector_bug ("%s:%u: failed assertion \"%s\"", "epan/dissectors/packet-http.c" , 2119, "!begin_with_chunk && handle && http_dechunk_body && http_desegment_body && headers->content_type && header_value_map" ))));
2120 |
2121 | content_info = wmem_new0(wmem_file_scope(), media_content_info_t)((media_content_info_t*)wmem_alloc0((wmem_file_scope()), sizeof (media_content_info_t)));
2122 | content_info->media_str = headers->content_type_parameters;
2123 | content_info->type = http_type;
2124 | content_info->data = header_value_map;
2125 |
2126 | streaming_reassembly_data = wmem_new0(wmem_file_scope(), http_streaming_reassembly_data_t)((http_streaming_reassembly_data_t*)wmem_alloc0((wmem_file_scope ()), sizeof(http_streaming_reassembly_data_t)));
2127 | streaming_reassembly_data->streaming_handle = handle;
2128 | streaming_reassembly_data->streaming_reassembly_info = streaming_reassembly_info_new();
2129 | streaming_reassembly_data->content_info = content_info;
2130 | streaming_reassembly_data->main_headers = headers;
2131 |
2132 | if (prv_data->req_fwd_flow == direction) {
2133 | prv_data->req_streaming_reassembly_data = streaming_reassembly_data;
2134 | } else {
2135 | prv_data->res_streaming_reassembly_data = streaming_reassembly_data;
2136 | }
2137 | }
2138 |
2139 | if (content_info == NULL((void*)0)) {
2140 | content_info = wmem_new0(pinfo->pool, media_content_info_t)((media_content_info_t*)wmem_alloc0((pinfo->pool), sizeof( media_content_info_t)));
2141 | content_info->media_str = headers->content_type_parameters;
2142 | content_info->type = http_type;
2143 | if (header_value_map == NULL((void*)0)) {
2144 | header_value_map = wmem_map_new(pinfo->pool, g_str_hash, g_str_equal);
2145 | }
2146 | content_info->data = header_value_map;
2147 | }
2148 |
2149 | dissecting_body:
2150 |
2151 | if (datalen > 0) {
2152 | /*
2153 | * There's stuff left over; process it.
2154 | */
2155 | tvbuff_t *next_tvb;
2156 | unsigned chunked_datalen = 0;
2157 | int data_len;
2158 |
2159 | /*
2160 | * Create a tvbuff for the payload.
2161 | *
2162 | * The amount of data to be processed that's
2163 | * available in the tvbuff is "datalen", which
2164 | * is the minimum of the amount of data left in
2165 | * the tvbuff and any specified content length.
2166 | *
2167 | * The amount of data to be processed that's in
2168 | * this frame, regardless of whether it was
2169 | * captured or not, is "reported_datalen",
2170 | * which, if no content length was specified,
2171 | * is -1, i.e. "to the end of the frame.
2172 | */
2173 | if (reported_datalen == -1) {
2174 | next_tvb = tvb_new_subset_remaining(tvb, offset);
2175 | } else {
2176 | next_tvb = tvb_new_subset_length(tvb, offset, reported_datalen);
2177 | }
2178 |
2179 | /*
2180 | * Handle *transfer* encodings.
2181 | */
2182 | if (headers->transfer_encoding_chunked) {
2183 | if (!http_dechunk_body) {
2184 | /* Chunking disabled, cannot dissect further. */
2185 | /* XXX: Should this be sent to the follow tap? */
2186 | call_data_dissector(next_tvb, pinfo, http_tree);
2187 | goto body_dissected;
2188 | }
2189 |
2190 | chunked_datalen = chunked_encoding_dissector(
2191 | &next_tvb, pinfo, http_tree, 0);
2192 |
2193 | if (chunked_datalen == 0) {
2194 | /*
2195 | * The chunks weren't reassembled,
2196 | * or there was a single zero
2197 | * length chunk.
2198 | */
2199 | goto body_dissected;
2200 | } else {
2201 | /*
2202 | * Add a new data source for the
2203 | * de-chunked data.
2204 | */
2205 | add_new_data_source(pinfo, next_tvb,
2206 | "De-chunked entity body");
2207 | /* chunked-body might be smaller than
2208 | * datalen. */
2209 | datalen = chunked_datalen;
2210 | }
2211 | }
2212 | /* Handle other transfer codings after de-chunking. */
2213 | switch (headers->transfer_encoding) {
2214 | case HTTP_TE_COMPRESS:
2215 | case HTTP_TE_DEFLATE:
2216 | case HTTP_TE_GZIP:
2217 | /*
2218 | * We currently can't handle, for example, "gzip",
2219 | * "compress", or "deflate" as *transfer* encodings;
2220 | * just handle them as data for now.
2221 | * XXX: Should this be sent to the follow tap?
2222 | */
2223 | call_data_dissector(next_tvb, pinfo, http_tree);
2224 | goto body_dissected;
2225 | default:
2226 | /* Nothing to do for "identity" or when header is
2227 | * missing or invalid. */
2228 | break;
2229 | }
2230 | /*
2231 | * At this point, any chunked *transfer* coding has been removed
2232 | * (the entity body has been dechunked) so it can be presented
2233 | * for the following operation (*content* encoding), or it has
2234 | * been handed off to the data dissector.
2235 | *
2236 | * Handle *content* encodings other than "identity" (which
2237 | * shouldn't appear in a Content-Encoding header, but
2238 | * we handle it in any case).
2239 | */
2240 | if (headers->content_encoding != NULL((void*)0) &&
2241 | g_ascii_strcasecmp(headers->content_encoding, "identity") != 0) {
2242 | /*
2243 | * We currently don't handle, for example, "compress";
2244 | * just handle them as data for now.
2245 | *
2246 | * After July 7, 2004 the LZW patent expired, so
2247 | * support could be added. However, I don't think
2248 | * that anybody ever really implemented "compress",
2249 | * due to the aforementioned patent.
2250 | */
2251 | tvbuff_t *uncomp_tvb = NULL((void*)0);
2252 | proto_item *e_ti = NULL((void*)0);
2253 | proto_tree *e_tree = NULL((void*)0);
2254 |
2255 | #if defined(HAVE_ZLIB1) || defined(HAVE_ZLIBNG)
2256 | if (http_decompress_body &&
2257 | (g_ascii_strcasecmp(headers->content_encoding, "gzip") == 0 ||
2258 | g_ascii_strcasecmp(headers->content_encoding, "deflate") == 0 ||
2259 | g_ascii_strcasecmp(headers->content_encoding, "x-gzip") == 0 ||
2260 | g_ascii_strcasecmp(headers->content_encoding, "x-deflate") == 0))
2261 | {
2262 | uncomp_tvb = tvb_child_uncompress_zlib(tvb, next_tvb, 0,
2263 | tvb_captured_length(next_tvb));
2264 | }
2265 | #endif
2266 |
2267 | #ifdef HAVE_BROTLI1
2268 | if (http_decompress_body &&
2269 | g_ascii_strcasecmp(headers->content_encoding, "br") == 0)
2270 | {
2271 | uncomp_tvb = tvb_child_uncompress_brotli(tvb, next_tvb, 0,
2272 | tvb_captured_length(next_tvb));
2273 | }
2274 | #endif
2275 |
2276 | #ifdef HAVE_SNAPPY1
2277 | if (http_decompress_body &&
2278 | g_ascii_strcasecmp(headers->content_encoding, "snappy") == 0)
2279 | {
2280 | uncomp_tvb = tvb_child_uncompress_snappy(tvb, next_tvb, 0,
2281 | tvb_captured_length(next_tvb));
2282 | }
2283 | #endif
2284 |
2285 | #ifdef HAVE_ZSTD1
2286 | if (http_decompress_body &&
2287 | g_ascii_strcasecmp(headers->content_encoding, "zstd") == 0)
2288 | {
2289 | uncomp_tvb = tvb_child_uncompress_zstd(tvb, next_tvb, 0,
2290 | tvb_captured_length(next_tvb));
2291 | }
2292 | #endif
2293 |
2294 | if (http_decompress_body &&
2295 | g_ascii_strcasecmp(headers->content_encoding, "xpress") == 0)
2296 | {
2297 | /*
2298 | * [MS-WUSP] 2.1.1 Xpress Compression
2299 | * Segmented into a series of blocks and compressed with the
2300 | * Plain LZ77 variant of [MS-XCA] Xpress Compression Algorithm.
2301 | *
2302 | * XXX - Does Microsoft use any other variants of [MS-XCA]
2303 | * for Content-Encoding: xpress in any other situations
2304 | * besides Windows Update Services?
2305 | */
2306 | int comp_offset = 0;
2307 | int compressed_len;
2308 | tvbuff_t *block_tvb;
2309 | while (tvb_captured_length_remaining(next_tvb, comp_offset) >= 8) {
2310 | comp_offset += 4; // original length
2311 | compressed_len = tvb_get_int32(next_tvb, comp_offset, ENC_LITTLE_ENDIAN0x80000000);
2312 | /*
2313 | * "The compressed size of each block MUST NOT be greater
2314 | * than 65535 bytes."
2315 | */
2316 | if (compressed_len <= 0 || compressed_len > 65535) {
2317 | break;
2318 | }
2319 | if (!tvb_bytes_exist(next_tvb, comp_offset, compressed_len)) {
2320 | break;
2321 | }
2322 | comp_offset += 4;
2323 | block_tvb = tvb_child_uncompress_lz77(tvb,
2324 | tvb_new_subset_length(next_tvb, comp_offset, compressed_len),
2325 | 0, compressed_len);
2326 | if (block_tvb) {
2327 | if (uncomp_tvb == NULL((void*)0)) {
2328 | uncomp_tvb = tvb_new_composite();
2329 | }
2330 | tvb_composite_append(uncomp_tvb, block_tvb);
2331 | } else {
2332 | break;
2333 | }
2334 | comp_offset += compressed_len;
2335 | }
2336 | if (uncomp_tvb != NULL((void*)0)) {
2337 | /*
2338 | * XXX - Should we add an expert info for partial
2339 | * decompression if we didn't finish? I.e., if
2340 | * tvb_captured_length_remaining(next_tvb, comp_offset) > 0
2341 | */
2342 | tvb_composite_finalize(uncomp_tvb);
2343 | }
2344 | }
2345 |
2346 | /*
2347 | * Add the encoded entity to the protocol tree
2348 | */
2349 | e_tree = proto_tree_add_subtree_format(http_tree, next_tvb,
2350 | 0, tvb_captured_length(next_tvb), ett_http_encoded_entity, &e_ti,
2351 | "Content-encoded entity body (%s): %u bytes",
2352 | headers->content_encoding,
2353 | tvb_captured_length(next_tvb));
2354 |
2355 | if (uncomp_tvb != NULL((void*)0)) {
2356 | /*
2357 | * Decompression worked
2358 | */
2359 |
2360 | /* XXX - Don't free this, since it's possible
2361 | * that the data was only partially
2362 | * decompressed, such as when desegmentation
2363 | * isn't enabled.
2364 | *
2365 | tvb_free(next_tvb);
2366 | */
2367 | proto_item_append_text(e_ti, " -> %u bytes", tvb_captured_length(uncomp_tvb));
2368 | next_tvb = uncomp_tvb;
2369 | add_new_data_source(pinfo, next_tvb,
2370 | "Uncompressed entity body");
2371 | } else {
2372 | if (http_decompress_body) {
2373 | /* XXX - We should distinguish between "failed", "unsupported
2374 | * only because support wasn't compiled in", and "unsupported
2375 | * by Wireshark", to indicate whether the problem is with
2376 | * the capture file, the build, or Wireshark.
2377 | */
2378 | expert_add_info(pinfo, e_ti, &ei_http_decompression_failed);
2379 | }
2380 | else {
2381 | expert_add_info(pinfo, e_ti, &ei_http_decompression_disabled);
2382 | }
2383 | /* XXX: Should this be sent to the follow tap? */
2384 | call_data_dissector(next_tvb, pinfo, e_tree);
2385 |
2386 | goto body_dissected;
2387 | }
2388 | }
2389 | /*
2390 | * Note that a new data source is added for the entity body
2391 | * only if it was content-encoded and/or transfer-encoded.
2392 | */
2393 |
2394 | /* Save values for the Export Object GUI feature if we have
2395 | * an active listener to process it (which happens when
2396 | * the export object window is open). */
2397 | /* XXX: Do we really want to send it to Export Object if we didn't
2398 | * get the headers, so that this is just a fragment of Continuation
2399 | * Data and not a complete object?
2400 | */
2401 | if(have_tap_listener(http_eo_tap)) {
2402 | eo_info = wmem_new0(pinfo->pool, http_eo_t)((http_eo_t*)wmem_alloc0((pinfo->pool), sizeof(http_eo_t)) );
2403 |
2404 | if (curr) {
2405 | eo_info->hostname = curr->http_host;
2406 | eo_info->filename = curr->request_uri;
2407 | }
2408 | eo_info->content_type = headers->content_type;
2409 | eo_info->payload = next_tvb;
2410 |
2411 | tap_queue_packet(http_eo_tap, pinfo, eo_info);
2412 | }
2413 |
2414 | /* Send it to Follow HTTP Stream and mark as file data */
2415 | if(have_tap_listener(http_follow_tap)) {
2416 | tap_queue_packet(http_follow_tap, pinfo, next_tvb);
2417 | }
2418 | data_len = tvb_captured_length(next_tvb);
2419 | proto_tree_add_bytes_format_value(http_tree, hf_http_file_data,
2420 | next_tvb, 0, data_len, NULL((void*)0), "%u byte%s", data_len, plurality(data_len, "", "s")((data_len) == 1 ? ("") : ("s")));
2421 |
2422 | if (tvb_captured_length(next_tvb) == 0)
2423 | goto body_dissected;
2424 |
2425 | /*
2426 | * Do subdissector checks.
2427 | */
2428 |
2429 | /*
2430 | * Is MIME sniffing enabled?
2431 | */
2432 | if (http_try_heuristic_first) {
2433 | /*
2434 | * Try the heuristic subdissectors.
2435 | */
2436 | uint16_t save_can_desegment = pinfo->can_desegment;
2437 | if (!(is_request_or_reply || streaming_chunk_mode)) {
2438 | /* If this isn't a request or reply, and we're not
2439 | * in streaming chunk mode, then we didn't try to
2440 | * desegment the body. (We think this is file data
2441 | * in the middle of a connection.) Allow the heuristic
2442 | * dissectors to desegment, if possible.
2443 | */
2444 | pinfo->can_desegment = pinfo->saved_can_desegment;
2445 | }
2446 | dissected = dissector_try_heuristic(heur_subdissector_list,
2447 | next_tvb, pinfo, tree, &hdtbl_entry, content_info);
2448 | pinfo->can_desegment = save_can_desegment;
2449 |
2450 | if (dissected) {
2451 | /*
2452 | * The subdissector dissected the body.
2453 | * Fix up the top-level item so that it doesn't
2454 | * include the stuff for that protocol.
2455 | */
2456 | if (ti != NULL((void*)0))
2457 | proto_item_set_len(ti, offset);
2458 | goto body_dissected;
2459 | }
2460 | }
2461 |
2462 | /* First, if we have a Content-Type value, check whether
2463 | * there's a subdissector for that media type.
2464 | */
2465 | if (headers->content_type != NULL((void*)0) && handle == NULL((void*)0)) {
2466 | /*
2467 | * We have a Content-Type value. Is there any subdissector
2468 | * for that content type?
2469 | */
2470 |
2471 | /*
2472 | * Calling the string handle for the media type
2473 | * dissector table will set pinfo->match_string
2474 | * to headers->content_type for us.
2475 | */
2476 | pinfo->match_string = headers->content_type;
2477 | handle = dissector_get_string_handle(
2478 | media_type_subdissector_table,
2479 | headers->content_type);
2480 | if (handle == NULL((void*)0) &&
2481 | strncmp(headers->content_type, "multipart/", sizeof("multipart/")-1) == 0) {
2482 | /* Try to decode the unknown multipart subtype anyway */
2483 | handle = dissector_get_string_handle(
2484 | media_type_subdissector_table,
2485 | "multipart/");
2486 | }
2487 | }
2488 |
2489 | /*
2490 | * Now, if we didn't find such a subdissector, check
2491 | * whether some subdissector asked that they be called
2492 | * if HTTP traffic was on some particular port. This
2493 | * handles protocols that use HTTP syntax but don't have
2494 | * a media type and instead use a specified port.
2495 | */
2496 | if (handle == NULL((void*)0)) {
2497 | /* If the HTTP dissector was called heuristically
2498 | * (or the HTTP dissector was called from the TLS
2499 | * dissector, which was called heuristically), then
2500 | * match_uint doesn't get set (or is likely set to
2501 | * 6 for IP_PROTO_TCP.) Some protocols (e.g., IPP)
2502 | * use the same specified port for both HTTP and
2503 | * HTTP over TLS, and one will be a heuristic match.
2504 | * In those cases, look at the src or dest port.
2505 | */
2506 | if (pinfo->match_uint == pinfo->srcport || pinfo->match_uint == pinfo->destport) {
2507 | handle = dissector_get_uint_handle(port_subdissector_table,
2508 | pinfo->match_uint);
2509 | } else if (http_type == MEDIA_CONTAINER_HTTP_REQUEST) {
2510 | handle = dissector_get_uint_handle(port_subdissector_table,
2511 | pinfo->destport);
2512 | } else if (http_type == MEDIA_CONTAINER_HTTP_RESPONSE) {
2513 | handle = dissector_get_uint_handle(port_subdissector_table,
2514 | pinfo->srcport);
2515 | }
2516 | }
2517 |
2518 | if (handle != NULL((void*)0)) {
2519 | /*
2520 | * We have a subdissector - call it.
2521 | */
2522 | if (streaming_chunk_mode) {
2523 | pinfo->match_string = headers->content_type;
2524 | /* reassemble and call subdissector */
2525 | dissected = (bool_Bool)reassemble_streaming_data_and_call_subdissector(next_tvb, pinfo, 0,
2526 | tvb_reported_length_remaining(next_tvb, 0), http_tree, proto_tree_get_parent_tree(tree),
2527 | http_streaming_reassembly_table, streaming_reassembly_data->streaming_reassembly_info,
2528 | get_http_chunk_frame_numget_virtual_frame_num64(tvb, pinfo, offset), handle,
2529 | proto_tree_get_parent_tree(tree), content_info,
2530 | "HTTP", &http_body_fragment_items, hf_http_body_segment);
2531 | } else {
2532 | dissected = (bool_Bool)call_dissector_only(handle, next_tvb, pinfo, tree, content_info);
2533 | }
2534 | if (!dissected)
2535 | expert_add_info(pinfo, http_tree, &ei_http_subdissector_failed);
2536 | }
2537 |
2538 | if (!dissected && !http_try_heuristic_first) {
2539 | /*
2540 | * We don't have a subdissector or we have one and it did not
2541 | * dissect the payload - try the heuristic subdissectors.
2542 | */
2543 | uint16_t save_can_desegment = pinfo->can_desegment;
2544 | if (!(is_request_or_reply || streaming_chunk_mode)) {
2545 | /* If this isn't a request or reply, and we're not
2546 | * in streaming chunk mode, then we didn't try to
2547 | * desegment the body. (We think this is file data
2548 | * in the middle of a connection.) Allow the heuristic
2549 | * dissectors to desegment, if possible.
2550 | */
2551 | pinfo->can_desegment = pinfo->saved_can_desegment;
2552 | }
2553 | dissected = dissector_try_heuristic(heur_subdissector_list,
2554 | next_tvb, pinfo, tree, &hdtbl_entry, content_info);
2555 | pinfo->can_desegment = save_can_desegment;
2556 | }
2557 |
2558 | if (dissected) {
2559 | /*
2560 | * The subdissector dissected the body.
2561 | * Fix up the top-level item so that it doesn't
2562 | * include the stuff for that protocol.
2563 | */
2564 | if (ti != NULL((void*)0))
2565 | proto_item_set_len(ti, offset);
2566 | } else {
2567 | if (headers->content_type != NULL((void*)0)) {
2568 | /*
2569 | * Calling the default media handle if there is a content-type that
2570 | * wasn't handled above.
2571 | */
2572 | call_dissector_with_data(media_handle, next_tvb, pinfo, tree, content_info);
2573 | } else {
2574 | /* Call the default data dissector */
2575 | call_data_dissector(next_tvb, pinfo, http_tree);
2576 | }
2577 | }
2578 |
2579 | body_dissected:
2580 | /*
2581 | * We've processed "datalen" bytes worth of data
2582 | * (which may be no data at all); advance the
2583 | * offset past whatever data we've processed.
2584 | */
2585 | offset += datalen;
2586 | }
2587 |
2588 | /* Detect protocol changes after receiving full response headers. */
2589 | if (http_type == MEDIA_CONTAINER_HTTP_RESPONSE && curr && pinfo->desegment_offset <= 0 && pinfo->desegment_len <= 0) {
2590 | dissector_handle_t next_handle = NULL((void*)0);
2591 | bool_Bool server_acked = false0;
2592 |
2593 | /*
2594 | * SSTP uses a special request method (instead of the Upgrade
2595 | * header) and expects a 200 response to set up the session.
2596 | */
2597 | if (g_strcmp0(curr->request_method, "SSTP_DUPLEX_POST") == 0 && curr->response_code == 200) {
2598 | next_handle = sstp_handle;
2599 | server_acked = true1;
2600 | }
2601 |
2602 | /*
2603 | * An HTTP/1.1 upgrade only proceeds if the server responds
2604 | * with 101 Switching Protocols. See RFC 7230 Section 6.7.
2605 | */
2606 | if (headers->upgrade && curr->response_code == 101) {
2607 | next_handle = http_upgrade_dissector(headers->upgrade);
2608 | server_acked = true1;
2609 | }
2610 |
2611 | if (server_acked && !PINFO_FD_VISITED(pinfo)((pinfo)->fd->visited)) {
2612 | conv_data->startframe = pinfo->num;
2613 | conv_data->startoffset = offset;
2614 | conv_data->next_handle = next_handle;
2615 | copy_address_wmem(wmem_file_scope(), &conv_data->server_addr, &pinfo->src);
2616 | conv_data->server_port = pinfo->srcport;
2617 | /* Prepare structure for upgrade protocol data */
2618 | conv_data->upgrade_info = wmem_new0(wmem_file_scope(), http_upgrade_info_t)((http_upgrade_info_t*)wmem_alloc0((wmem_file_scope()), sizeof (http_upgrade_info_t)));
2619 | conv_data->upgrade_info->server_port = pinfo->srcport;
2620 | conv_data->upgrade_info->http_version = 1;
2621 | conv_data->upgrade_info->get_header_value = http_get_header_value;
2622 | }
2623 | }
2624 |
2625 | if (stat_info)
2626 | tap_queue_packet(http_tap, pinfo, stat_info);
2627 |
2628 | return offset - orig_offset;
2629 | }
2630 |
2631 | /* This can be used to dissect an HTTP request until such time
2632 | * that a more complete dissector is written for that HTTP request.
2633 | * This simple dissector only puts the request method, URI, and
2634 | * protocol version into a sub-tree.
2635 | */
2636 | static void
2637 | basic_request_dissector(packet_info *pinfo, tvbuff_t *tvb, proto_tree *tree,
2638 | unsigned offset, const unsigned char *line, const unsigned char *lineend,
2639 | http_conv_t *conv_data _U___attribute__((unused)), http_req_res_t *curr)
2640 | {
2641 | const unsigned char *next_token;
2642 | const char *request_uri;
2643 | unsigned tokenlen;
2644 | proto_item* ti;
2645 | http_info_value_t *stat_info = p_get_proto_data(pinfo->pool, pinfo, proto_http, HTTP_PROTO_DATA_INFO1);
2646 |
2647 | /* The first token is the method. */
2648 | tokenlen = get_token_len(line, lineend, &next_token);
2649 | if (tokenlen == 0)
2650 | return;
2651 | proto_tree_add_item(tree, hf_http_request_method, tvb, offset, tokenlen,
2652 | ENC_ASCII0x00000000);
2653 | if ((next_token - line) > 2 && next_token[-1] == ' ' && next_token[-2] == ' ') {
2654 | /* Two spaces in a now indicates empty URI, so roll back one here */
2655 | next_token--;
2656 | }
2657 | offset += (unsigned) (next_token - line);
2658 | line = next_token;
2659 |
2660 | /* The next token is the URI. */
2661 | tokenlen = get_token_len(line, lineend, &next_token);
2662 |
2663 | /* Save the request URI for various later uses */
2664 | request_uri = (char*)tvb_get_string_enc(pinfo->pool, tvb, offset, tokenlen, ENC_ASCII0x00000000);
2665 |
2666 | if (request_uri == NULL((void*)0) && curr)
2667 | request_uri = curr->request_uri;
2668 |
2669 | stat_info->request_uri = wmem_strdup(pinfo->pool, request_uri);
2670 | if (!PINFO_FD_VISITED(pinfo)((pinfo)->fd->visited) && curr) {
2671 | curr->request_uri = wmem_strdup(wmem_file_scope(), request_uri);
2672 | }
2673 | ti = proto_tree_add_string(tree, hf_http_request_uri, tvb, offset, tokenlen, request_uri);
2674 | http_add_path_components_to_tree(tvb, pinfo, ti, offset, tokenlen);
2675 | offset += (unsigned) (next_token - line);
2676 | line = next_token;
2677 |
2678 | /* Everything to the end of the line is the version. */
2679 | tokenlen = (int) (lineend - line);
2680 | proto_tree_add_item(tree, hf_http_request_version, tvb, offset, tokenlen,
2681 | ENC_ASCII0x00000000);
2682 | }
2683 |
2684 | static int
2685 | parse_http_status_code(const unsigned char *line, const unsigned char *lineend)
2686 | {
2687 | const unsigned char *next_token;
2688 | unsigned tokenlen;
2689 | char response_code_chars[4];
2690 | int32_t status_code = 0;
2691 |
2692 | /*
2693 | * The first token is the HTTP Version.
2694 | */
2695 | tokenlen = get_token_len(line, lineend, &next_token);
2696 | if (tokenlen == 0)
2697 | return 0;
2698 | line = next_token;
2699 |
2700 | /*
2701 | * The second token is the Status Code.
2702 | */
2703 | tokenlen = get_token_len(line, lineend, &next_token);
2704 | if (tokenlen != 3)
2705 | return 0;
2706 |
2707 | memcpy(response_code_chars, line, 3);
2708 | response_code_chars[3] = '\0';
2709 | if (!ws_strtoi32(response_code_chars, NULL((void*)0), &status_code))
2710 | return 0;
2711 |
2712 | return status_code;
2713 | }
2714 |
2715 | static void
2716 | basic_response_dissector(packet_info *pinfo, tvbuff_t *tvb, proto_tree *tree,
2717 | unsigned offset, const unsigned char *line, const unsigned char *lineend,
2718 | http_conv_t *conv_data _U___attribute__((unused)), http_req_res_t *curr)
2719 | {
2720 | const unsigned char *next_token;
2721 | const unsigned char *status_code_token;
2722 | unsigned tokenlen;
2723 | unsigned i;
2724 | unsigned expert_len;
2725 | bool_Bool invalid_status_code_token = false0;
2726 | int status_code_offset;
2727 | proto_item *ti;
2728 | proto_item *r_ti;
2729 | http_info_value_t *stat_info = p_get_proto_data(pinfo->pool, pinfo, proto_http, HTTP_PROTO_DATA_INFO1);
2730 |
2731 | /*
2732 | * The first token is the HTTP Version.
2733 | */
2734 | tokenlen = get_token_len(line, lineend, &next_token);
2735 | if (tokenlen == 0)
2736 | return;
2737 | proto_tree_add_item(tree, hf_http_response_version, tvb, offset, tokenlen,
2738 | ENC_ASCII0x00000000);
2739 | /* Advance to the start of the next token. */
2740 | offset += (int) (next_token - line);
2741 | line = next_token;
| Value stored to 'line' is never read
2742 |
2743 | /*
2744 | * The second token is the Status Code.
2745 | */
2746 | status_code_token = next_token;
2747 | status_code_offset = offset;
2748 | tokenlen = get_token_len(status_code_token, lineend, &next_token);
2749 |
2750 | /* Validate status code token */
2751 | if (tokenlen != 3) {
2752 | invalid_status_code_token = true1;
2753 | } else {
2754 | for (i = 0; i < tokenlen; i++) {
2755 | if (!g_ascii_isdigit(status_code_token[i])((g_ascii_table[(guchar) (status_code_token[i])] & G_ASCII_DIGIT ) != 0)) {
2756 | invalid_status_code_token = true1;
2757 | break;
2758 | }
2759 | }
2760 | }
2761 |
2762 | expert_len = tokenlen;
2763 | if (expert_len == 0 && tvb_reported_length_remaining(tvb, status_code_offset) > 0)
2764 | expert_len = 1;
2765 |
2766 | if (tokenlen >= 3) {
2767 | ws_buftou32(status_code_token, 3, NULL((void*)0), &stat_info->response_code);
2768 | if (curr) {
2769 | curr->response_code = stat_info->response_code;
2770 | }
2771 | }
2772 |
2773 | ti = proto_tree_add_uint(tree, hf_http_response_code, tvb, status_code_offset,
2774 | tokenlen < 3 ? expert_len : 3,
2775 | stat_info->response_code);
2776 | if (expert_len > 3)
2777 | proto_item_set_len(ti, expert_len);
2778 |
2779 | if (invalid_status_code_token) {
2780 | expert_add_info_format(pinfo, ti, &ei_http_response_code_invalid,
2781 | "Invalid HTTP response status code token: \"%s\" (expected exactly 3 digits)",
2782 | format_text(pinfo->pool, (const char *)status_code_token, tokenlen));
2783 | }
2784 | if (tokenlen < 3)
2785 | return;
2786 |
2787 | r_ti = proto_tree_add_string(tree, hf_http_response_code_desc,
2788 | tvb, status_code_offset, 3, val_to_str(pinfo->pool, stat_info->response_code,
2789 | vals_http_status_code, "Unknown (%d)"));
2790 |
2791 | proto_item_set_generated(r_ti);
2792 |
2793 | /* Advance to the start of the next token. */
2794 | offset += (int) (next_token - status_code_token);
2795 | line = next_token;
2796 |
2797 | /*
2798 | * The remaining tokens in the line comprise the Reason Phrase.
2799 | */
2800 | tokenlen = (int) (lineend - line);
2801 | if (tokenlen >= 1) {
2802 | proto_tree_add_item(tree, hf_http_response_phrase, tvb, offset,
2803 | tokenlen, ENC_ASCII0x00000000);
2804 | }
2805 | }
2806 |
2807 | /*
2808 | * Dissect the http data chunks and add them to the tree.
2809 | */
2810 | static unsigned
2811 | chunked_encoding_dissector(tvbuff_t **tvb_ptr, packet_info *pinfo,
2812 | proto_tree *tree, unsigned offset)
2813 | {
2814 | tvbuff_t *tvb;
2815 | uint32_t datalen;
2816 | uint32_t orig_datalen;
2817 | unsigned chunked_data_size;
2818 | proto_tree *subtree;
2819 | proto_item *pi_chunked = NULL((void*)0);
2820 | uint8_t *raw_data;
2821 | unsigned raw_len;
2822 | unsigned chunk_counter = 0;
2823 | int last_chunk_id = -1;
2824 |
2825 | if ((tvb_ptr == NULL((void*)0)) || (*tvb_ptr == NULL((void*)0))) {
2826 | return 0;
2827 | }
2828 |
2829 | tvb = *tvb_ptr;
2830 |
2831 | datalen = tvb_reported_length_remaining(tvb, offset);
2832 |
2833 | subtree = proto_tree_add_subtree(tree, tvb, offset, datalen,
2834 | ett_http_chunked_response, &pi_chunked,
2835 | "HTTP chunked response");
2836 |
2837 | /* Dechunk the "chunked response" to a new memory buffer */
2838 | /* XXX: Composite tvbuffers do work now, so we should probably
2839 | * use that to avoid the memcpys unless necessary.
2840 | */
2841 | orig_datalen = datalen;
2842 | raw_data = (uint8_t *)wmem_alloc(pinfo->pool, datalen);
2843 | raw_len = 0;
2844 | chunked_data_size = 0;
2845 |
2846 | while (datalen > 0) {
2847 | uint32_t chunk_size;
2848 | unsigned chunk_offset;
2849 | unsigned linelen;
2850 | unsigned endoff;
2851 | bool_Bool found;
2852 |
2853 | found = tvb_find_line_end_remaining(tvb, offset, &linelen , &chunk_offset);
2854 |
2855 | if (linelen == 0 || found == false0) {
2856 | /* Can't get the chunk size line */
2857 | break;
2858 | }
2859 |
2860 | tvb_get_string_uint(tvb, offset, linelen, ENC_STR_HEX0x02000000, &chunk_size, &endoff);
2861 |
2862 | if (chunk_size > datalen) {
2863 | /*
2864 | * The chunk size is more than what's in the tvbuff,
2865 | * so either the user hasn't enabled decoding, or all
2866 | * of the segments weren't captured.
2867 | */
2868 | chunk_size = datalen;
2869 | }
2870 |
2871 | chunked_data_size += chunk_size;
2872 |
2873 | DISSECTOR_ASSERT((raw_len+chunk_size) <= orig_datalen)((void) (((raw_len+chunk_size) <= orig_datalen) ? (void)0 : (proto_report_dissector_bug("%s:%u: failed assertion \"%s\"" , "epan/dissectors/packet-http.c", 2873, "(raw_len+chunk_size) <= orig_datalen" ))));
2874 | tvb_memcpy(tvb, (uint8_t *)(raw_data + raw_len), chunk_offset, chunk_size);
2875 | raw_len += chunk_size;
2876 |
2877 | ++chunk_counter;
2878 |
2879 | if (subtree) {
2880 | proto_tree *chunk_subtree;
2881 | proto_item *chunk_size_item;
2882 |
2883 | if(chunk_size == 0) {
2884 | chunk_subtree = proto_tree_add_subtree(subtree, tvb,
2885 | offset,
2886 | chunk_offset - offset + chunk_size + 2,
2887 | ett_http_chunk_data, NULL((void*)0),
2888 | "End of chunked encoding");
2889 | last_chunk_id = chunk_counter - 1;
2890 | } else {
2891 | chunk_subtree = proto_tree_add_subtree_format(subtree, tvb,
2892 | offset,
2893 | chunk_offset - offset + chunk_size + 2,
2894 | ett_http_chunk_data, NULL((void*)0),
2895 | "Data chunk (%u octets)", chunk_size);
2896 | }
2897 |
2898 | chunk_size_item = proto_tree_add_uint(chunk_subtree, hf_http_chunk_size, tvb, offset,
2899 | 1, chunk_size);
2900 | proto_item_set_len(chunk_size_item, chunk_offset - offset);
2901 |
2902 | /* last-chunk does not have chunk-data CRLF. */
2903 | if (chunk_size > 0) {
2904 | /*
2905 | * Adding the chunk as FT_BYTES means that, in
2906 | * TShark, you get the entire chunk dumped
2907 | * out in hex, in addition to whatever
2908 | * dissection is done on the reassembled data.
2909 | */
2910 | proto_tree_add_item(chunk_subtree, hf_http_chunk_data, tvb, chunk_offset, chunk_size, ENC_NA0x00000000);
2911 | proto_tree_add_item(chunk_subtree, hf_http_chunk_boundary, tvb,
2912 | chunk_offset + chunk_size, 2, ENC_NA0x00000000);
2913 | }
2914 | }
2915 |
2916 | offset = chunk_offset + chunk_size; /* beginning of next chunk */
2917 | if (chunk_size > 0) offset += 2; /* CRLF of chunk */
2918 | datalen = tvb_reported_length_remaining(tvb, offset);
2919 |
2920 | /* This is the last chunk */
2921 | if (chunk_size == 0) {
2922 | /* Check for: trailer-part CRLF.
2923 | * trailer-part = *( header-field CRLF ) */
2924 | unsigned trailer_offset = offset, trailer_len;
2925 | unsigned header_field_len;
2926 | bool_Bool header_field_len_found;
2927 | /* Skip all header-fields. */
2928 | do {
2929 | trailer_len = trailer_offset - offset;
2930 | header_field_len_found = tvb_find_line_end_length(tvb,
2931 | trailer_offset,
2932 | datalen - trailer_len,
2933 | &header_field_len,
2934 | &trailer_offset);
2935 | } while (header_field_len_found && header_field_len > 0);
2936 | if (trailer_len > 0) {
2937 | proto_tree_add_item(subtree,
2938 | hf_http_chunked_trailer_part,
2939 | tvb, offset, trailer_len, ENC_ASCII0x00000000);
2940 | offset += trailer_len;
2941 | datalen -= trailer_len;
2942 | }
2943 |
2944 | /* last CRLF of chunked-body is found. */
2945 | if (header_field_len == 0) {
2946 | proto_tree_add_format_text(subtree, tvb, offset,
2947 | trailer_offset - offset);
2948 | datalen -= trailer_offset - offset;
2949 | }
2950 | break;
2951 | }
2952 | }
2953 |
2954 | /* datalen is the remaining bytes that are available for consumption. If
2955 | * smaller than orig_datalen, then bytes were consumed. */
2956 | if (datalen < orig_datalen) {
2957 | tvbuff_t *new_tvb;
2958 | proto_item_set_len(pi_chunked, orig_datalen - datalen);
2959 | new_tvb = tvb_new_child_real_data(tvb, raw_data, chunked_data_size, chunked_data_size);
2960 | *tvb_ptr = new_tvb;
2961 | }
2962 |
2963 | if (chunk_counter > 0) {
2964 | proto_item* ti_http = proto_tree_get_parent(tree);
2965 | proto_item_append_text(ti_http, ", has %d chunk%s%s",
2966 | chunk_counter, plurality(chunk_counter, "", "s")((chunk_counter) == 1 ? ("") : ("s")),
2967 | (last_chunk_id < 0 ? "" : " (including last chunk)"));
2968 |
2969 | if (last_chunk_id == 0) {
2970 | /* only append text to column while starting with last chunk */
2971 | col_append_sep_str(pinfo->cinfo, COL_INFO, " ", "[Last Chunk]");
2972 | }
2973 | }
2974 |
2975 | /* Size of chunked-body or 0 if none was found. */
2976 | return orig_datalen - datalen;
2977 | }
2978 |
2979 | static bool_Bool
2980 | http_conversation_is_connect(conversation_t *conv, uint32_t frame_num)
2981 | {
2982 | if (!conv) {
2983 | return false0;
2984 | }
2985 |
2986 | http_conv_t *conv_data = (http_conv_t *)conversation_get_proto_data(conv, proto_http);
2987 | if (conv_data) {
2988 | http_req_res_t *curr_req_res = conv_data->req_res_tail;
2989 | /* Any 2xx (Successful) response indicates the sender will
2990 | * switch to tunnel mode immediately after the response header
2991 | * section. */
2992 | if(frame_num >= conv_data->startframe &&
2993 | curr_req_res &&
2994 | curr_req_res->response_code >= 200 &&
2995 | curr_req_res->response_code < 300 &&
2996 | curr_req_res->request_method &&
2997 | strncmp(curr_req_res->request_method, "CONNECT", 7) == 0 &&
2998 | curr_req_res->request_uri) {
2999 |
3000 | return true1;
3001 | }
3002 | }
3003 |
3004 | return false0;
3005 | }
3006 |
3007 | /* Call a subdissector to handle HTTP CONNECT's traffic */
3008 | static void
3009 | http_payload_subdissector(tvbuff_t *tvb, proto_tree *tree,
3010 | packet_info *pinfo, http_conv_t *conv_data, void* data)
3011 | {
3012 | uint32_t *ptr = NULL((void*)0);
3013 | uint32_t uri_port, saved_port, srcport, destport;
3014 | address uri_addr, saved_addr;
3015 | address *addrp;
3016 | char **strings; /* An array for splitting the request URI into hostname and port */
3017 | proto_item *item;
3018 | proto_tree *proxy_tree;
3019 | conversation_t *conv;
3020 | bool_Bool from_server = pinfo->srcport == conv_data->server_port &&
3021 | addresses_equal(&conv_data->server_addr, &pinfo->src);
3022 |
3023 | /* Grab the destination port number from the request URI to find the right subdissector */
3024 | strings = wmem_strsplit(pinfo->pool, conv_data->req_res_tail->request_uri, ":", 2);
3025 |
3026 | if(strings[0] != NULL((void*)0) && strings[1] != NULL((void*)0)) {
3027 | /*
3028 | * The string was successfully split in two
3029 | * Create a proxy-connect subtree
3030 | */
3031 | item = proto_tree_add_item(tree, proto_http, tvb, 0, -1, ENC_NA0x00000000);
3032 | proxy_tree = proto_item_add_subtree(item, ett_http);
3033 |
3034 | item = proto_tree_add_string(proxy_tree, hf_http_proxy_connect_host,
3035 | tvb, 0, 0, strings[0]);
3036 | proto_item_set_generated(item);
3037 |
3038 | if (!ws_strtou32(strings[1], NULL((void*)0), &uri_port)) {
3039 | proto_tree_add_expert_format(proxy_tree, pinfo, &ei_http_request_uri_invalid,
3040 | tvb, 0, 0, "Invalid target port number (%s)", strings[1]);
3041 | return;
3042 | }
3043 |
3044 | item = proto_tree_add_uint(proxy_tree, hf_http_proxy_connect_port,
3045 | tvb, 0, 0, uri_port);
3046 | proto_item_set_generated(item);
3047 |
3048 | /* Set the port and address to the proxied ones so that
3049 | * decode_tcp_ports doesn't call the current conversation
3050 | * dissector (we must set the address if the URI port is the
3051 | * same), and other functions that retrieve conversation data
3052 | * or set the conversation dissector don't affect the original
3053 | * conversation but the proxied one.
3054 | */
3055 |
3056 | /* Just use the string as a string address. */
3057 | set_address(&uri_addr, AT_STRINGZ, (int)strlen(strings[0]) + 1, strings[0]);
3058 | /* We may get stuck in a recursion loop if we let decode_tcp_ports() call us.
3059 | * So, if the conversation that would be called also is CONNECT,
3060 | * call the data dissector directly instead. The CONNECT method
3061 | * is blind forwarding of data and consumes no payload itself
3062 | * here, so infinite loops are possible. (Strictly, to avoid a
3063 | * loop we must only assure that the same 5-tuple isn't reused,
3064 | * which would take more work to check.)
3065 | */
3066 | if (!from_server) {
3067 | srcport = pinfo->srcport;
3068 | destport = uri_port;
3069 | conv = find_conversation(pinfo->num, &pinfo->src, &uri_addr, CONVERSATION_TCP, srcport, destport, 0);
3070 | } else {
3071 | srcport = uri_port;
3072 | destport = pinfo->destport;
3073 | conv = find_conversation(pinfo->num, &uri_addr, &pinfo->dst, CONVERSATION_TCP, srcport, destport, 0);
3074 | }
3075 |
3076 | if (http_conversation_is_connect(conv, pinfo->num)) {
3077 | call_data_dissector(tvb, pinfo, tree);
3078 | } else {
3079 | /* set pinfo->{src/dst port} and call the TCP sub-dissector lookup */
3080 | if (!from_server) {
3081 | ptr = &pinfo->destport;
3082 | addrp = &pinfo->src;
3083 | } else {
3084 | ptr = &pinfo->srcport;
3085 | addrp = &pinfo->dst;
3086 | }
3087 |
3088 | /* Increase pinfo->can_desegment because we are traversing
3089 | * http and want to preserve desegmentation functionality for
3090 | * the proxied protocol
3091 | */
3092 | if( pinfo->can_desegment>0 )
3093 | pinfo->can_desegment++;
3094 |
3095 | copy_address_shallow(&saved_addr, addrp);
3096 | copy_address_shallow(addrp, &uri_addr);
3097 | saved_port = *ptr;
3098 | *ptr = uri_port;
3099 | decode_tcp_ports(tvb, 0, pinfo, tree,
3100 | pinfo->srcport, pinfo->destport, NULL((void*)0),
3101 | (struct tcpinfo *)data);
3102 | *ptr = saved_port;
3103 | copy_address_shallow(addrp, &saved_addr);
3104 | }
3105 | }
3106 | }
3107 |
3108 |
3109 |
3110 | /*
3111 | * XXX - this won't handle HTTP 0.9 replies, but they're all data
3112 | * anyway.
3113 | */
3114 | static int
3115 | is_http_request_or_reply(packet_info *pinfo, const char *data, unsigned linelen, media_container_type_t *type,
3116 | ReqRespDissector *reqresp_dissector,
3117 | http_conv_t *conv_data _U___attribute__((unused)))
3118 | {
3119 | http_info_value_t *stat_info = p_get_proto_data(pinfo->pool, pinfo, proto_http, HTTP_PROTO_DATA_INFO1);
3120 | int isHttpRequestOrReply = false0;
3121 |
3122 | /*
3123 | * From RFC 2774 - An HTTP Extension Framework
3124 | *
3125 | * Support the command prefix that identifies the presence of
3126 | * a "mandatory" header.
3127 | */
3128 | if (linelen >= 2 && strncmp(data, "M-", 2) == 0) {
3129 | data += 2;
3130 | linelen -= 2;
3131 | }
3132 |
3133 | /*
3134 | * From draft-cohen-gena-client-01.txt, available from the uPnP forum:
3135 | * NOTIFY, SUBSCRIBE, UNSUBSCRIBE
3136 | *
3137 | * From draft-ietf-dasl-protocol-00.txt, a now vanished Microsoft draft:
3138 | * SEARCH
3139 | */
3140 | if ((linelen >= 5 && strncmp(data, "HTTP/", 5) == 0) ||
3141 | (linelen >= 3 && strncmp(data, "ICY", 3) == 0)) {
3142 | *type = MEDIA_CONTAINER_HTTP_RESPONSE;
3143 | isHttpRequestOrReply = true1; /* response */
3144 | if (reqresp_dissector)
3145 | *reqresp_dissector = basic_response_dissector;
3146 | } else {
3147 | const unsigned char * ptr = (const unsigned char *)data;
3148 | unsigned indx = 0;
3149 |
3150 | /* Look for the space following the Method */
3151 | while (indx < linelen) {
3152 | if (*ptr == ' ')
3153 | break;
3154 | else {
3155 | ptr++;
3156 | indx++;
3157 | }
3158 | }
3159 |
3160 | /* Check the methods that have same length */
3161 | switch (indx) {
3162 |
3163 | case 3:
3164 | if (strncmp(data, "GET", indx) == 0 ||
3165 | strncmp(data, "PUT", indx) == 0) {
3166 | *type = MEDIA_CONTAINER_HTTP_REQUEST;
3167 | isHttpRequestOrReply = true1;
3168 | }
3169 | break;
3170 |
3171 | case 4:
3172 | if (strncmp(data, "COPY", indx) == 0 ||
3173 | strncmp(data, "HEAD", indx) == 0 ||
3174 | strncmp(data, "LOCK", indx) == 0 ||
3175 | strncmp(data, "MOVE", indx) == 0 ||
3176 | strncmp(data, "POLL", indx) == 0 ||
3177 | strncmp(data, "POST", indx) == 0) {
3178 | *type = MEDIA_CONTAINER_HTTP_REQUEST;
3179 | isHttpRequestOrReply = true1;
3180 | }
3181 | break;
3182 |
3183 | case 5:
3184 | if (strncmp(data, "BCOPY", indx) == 0 ||
3185 | strncmp(data, "BMOVE", indx) == 0 ||
3186 | strncmp(data, "MKCOL", indx) == 0 ||
3187 | strncmp(data, "TRACE", indx) == 0 ||
3188 | strncmp(data, "PATCH", indx) == 0 || /* RFC 5789 */
3189 | strncmp(data, "LABEL", indx) == 0 || /* RFC 3253 8.2 */
3190 | strncmp(data, "MERGE", indx) == 0) { /* RFC 3253 11.2 */
3191 | *type = MEDIA_CONTAINER_HTTP_REQUEST;
3192 | isHttpRequestOrReply = true1;
3193 | }
3194 | break;
3195 |
3196 | case 6:
3197 | if (strncmp(data, "DELETE", indx) == 0 ||
3198 | strncmp(data, "SEARCH", indx) == 0 ||
3199 | strncmp(data, "UNLOCK", indx) == 0 ||
3200 | strncmp(data, "REPORT", indx) == 0 || /* RFC 3253 3.6 */
3201 | strncmp(data, "UPDATE", indx) == 0) { /* RFC 3253 7.1 */
3202 | *type = MEDIA_CONTAINER_HTTP_REQUEST;
3203 | isHttpRequestOrReply = true1;
3204 | }
3205 | else if (strncmp(data, "NOTIFY", indx) == 0) {
3206 | *type = MEDIA_CONTAINER_HTTP_NOTIFICATION;
3207 | isHttpRequestOrReply = true1;
3208 | }
3209 | break;
3210 |
3211 | case 7:
3212 | if (strncmp(data, "BDELETE", indx) == 0 ||
3213 | strncmp(data, "CONNECT", indx) == 0 ||
3214 | strncmp(data, "OPTIONS", indx) == 0 ||
3215 | strncmp(data, "CHECKIN", indx) == 0) { /* RFC 3253 4.4, 9.4 */
3216 | *type = MEDIA_CONTAINER_HTTP_REQUEST;
3217 | isHttpRequestOrReply = true1;
3218 | }
3219 | break;
3220 |
3221 | case 8:
3222 | if (strncmp(data, "PROPFIND", indx) == 0 ||
3223 | strncmp(data, "CHECKOUT", indx) == 0 || /* RFC 3253 4.3, 9.3 */
3224 | strncmp(data, "CCM_POST", indx) == 0) {
3225 | *type = MEDIA_CONTAINER_HTTP_REQUEST;
3226 | isHttpRequestOrReply = true1;
3227 | }
3228 | break;
3229 |
3230 | case 9:
3231 | if (strncmp(data, "SUBSCRIBE", indx) == 0) {
3232 | *type = MEDIA_CONTAINER_HTTP_NOTIFICATION;
3233 | isHttpRequestOrReply = true1;
3234 | } else if (strncmp(data, "PROPPATCH", indx) == 0 ||
3235 | strncmp(data, "BPROPFIND", indx) == 0) {
3236 | *type = MEDIA_CONTAINER_HTTP_REQUEST;
3237 | isHttpRequestOrReply = true1;
3238 | }
3239 | break;
3240 |
3241 | case 10:
3242 | if (strncmp(data, "BPROPPATCH", indx) == 0 ||
3243 | strncmp(data, "UNCHECKOUT", indx) == 0 || /* RFC 3253 4.5 */
3244 | strncmp(data, "MKACTIVITY", indx) == 0) { /* RFC 3253 13.5 */
3245 | *type = MEDIA_CONTAINER_HTTP_REQUEST;
3246 | isHttpRequestOrReply = true1;
3247 | }
3248 | break;
3249 |
3250 | case 11:
3251 | if (strncmp(data, "MKWORKSPACE", indx) == 0 || /* RFC 3253 6.3 */
3252 | strncmp(data, "RPC_CONNECT", indx) == 0 || /* [MS-RPCH] 2.1.1.1.1 */
3253 | strncmp(data, "RPC_IN_DATA", indx) == 0) { /* [MS-RPCH] 2.1.2.1.1 */
3254 | *type = MEDIA_CONTAINER_HTTP_REQUEST;
3255 | isHttpRequestOrReply = true1;
3256 | } else if (strncmp(data, "UNSUBSCRIBE", indx) == 0) {
3257 | *type = MEDIA_CONTAINER_HTTP_NOTIFICATION;
3258 | isHttpRequestOrReply = true1;
3259 | }
3260 | break;
3261 |
3262 | case 12:
3263 | if (strncmp(data, "RPC_OUT_DATA", indx) == 0) { /* [MS-RPCH] 2.1.2.1.2 */
3264 | *type = MEDIA_CONTAINER_HTTP_REQUEST;
3265 | isHttpRequestOrReply = true1;
3266 | }
3267 | break;
3268 |
3269 | case 15:
3270 | if (strncmp(data, "VERSION-CONTROL", indx) == 0) { /* RFC 3253 3.5 */
3271 | *type = MEDIA_CONTAINER_HTTP_REQUEST;
3272 | isHttpRequestOrReply = true1;
3273 | }
3274 | break;
3275 |
3276 | case 16:
3277 | if (strncmp(data, "BASELINE-CONTROL", indx) == 0) { /* RFC 3253 12.6 */
3278 | *type = MEDIA_CONTAINER_HTTP_REQUEST;
3279 | isHttpRequestOrReply = true1;
3280 | } else if (strncmp(data, "SSTP_DUPLEX_POST", indx) == 0) { /* MS SSTP */
3281 | *type = MEDIA_CONTAINER_HTTP_REQUEST;
3282 | isHttpRequestOrReply = true1;
3283 | }
3284 | break;
3285 |
3286 | default:
3287 | break;
3288 | }
3289 |
3290 | if (isHttpRequestOrReply && reqresp_dissector) {
3291 | *reqresp_dissector = basic_request_dissector;
3292 |
3293 | stat_info->request_method = wmem_strndup(pinfo->pool, data, indx);
3294 | }
3295 |
3296 |
3297 |
3298 | }
3299 |
3300 | return isHttpRequestOrReply;
3301 | }
3302 |
3303 | /*
3304 | * Process headers.
3305 | */
3306 | typedef struct {
3307 | const char *name;
3308 | int *hf;
3309 | int special;
3310 | } header_info;
3311 |
3312 | #define HDR_NO_SPECIAL0 0
3313 | #define HDR_AUTHORIZATION1 1
3314 | #define HDR_AUTHENTICATE2 2
3315 | #define HDR_CONTENT_TYPE3 3
3316 | #define HDR_CONTENT_LENGTH4 4
3317 | #define HDR_CONTENT_ENCODING5 5
3318 | #define HDR_TRANSFER_ENCODING6 6
3319 | #define HDR_HOST7 7
3320 | #define HDR_UPGRADE8 8
3321 | #define HDR_COOKIE9 9
3322 | #define HDR_WEBSOCKET_PROTOCOL10 10
3323 | #define HDR_WEBSOCKET_EXTENSIONS11 11
3324 | #define HDR_REFERER12 12
3325 | #define HDR_LOCATION13 13
3326 | #define HDR_HTTP2_SETTINGS14 14
3327 | #define HDR_RANGE15 15
3328 | #define HDR_CONTENT_RANGE16 16
3329 |
3330 | static const header_info headers[] = {
3331 | { "Authorization", &hf_http_authorization, HDR_AUTHORIZATION1 },
3332 | { "Proxy-Authorization", &hf_http_proxy_authorization, HDR_AUTHORIZATION1 },
3333 | { "Proxy-Authenticate", &hf_http_proxy_authenticate, HDR_AUTHENTICATE2 },
3334 | { "WWW-Authenticate", &hf_http_www_authenticate, HDR_AUTHENTICATE2 },
3335 | { "Content-Type", &hf_http_content_type, HDR_CONTENT_TYPE3 },
3336 | { "Content-Length", &hf_http_content_length_header, HDR_CONTENT_LENGTH4 },
3337 | { "Content-Encoding", &hf_http_content_encoding, HDR_CONTENT_ENCODING5 },
3338 | { "Transfer-Encoding", &hf_http_transfer_encoding, HDR_TRANSFER_ENCODING6 },
3339 | { "Upgrade", &hf_http_upgrade, HDR_UPGRADE8 },
3340 | { "User-Agent", &hf_http_user_agent, HDR_NO_SPECIAL0 },
3341 | { "Host", &hf_http_host, HDR_HOST7 },
3342 | { "Range", &hf_http_range, HDR_RANGE15 },
3343 | { "Content-Range", &hf_http_content_range, HDR_CONTENT_RANGE16 },
3344 | { "Connection", &hf_http_connection, HDR_NO_SPECIAL0 },
3345 | { "Cookie", &hf_http_cookie, HDR_COOKIE9 },
3346 | { "Accept", &hf_http_accept, HDR_NO_SPECIAL0 },
3347 | { "Referer", &hf_http_referer, HDR_REFERER12 },
3348 | { "Accept-Language", &hf_http_accept_language, HDR_NO_SPECIAL0 },
3349 | { "Accept-Encoding", &hf_http_accept_encoding, HDR_NO_SPECIAL0 },
3350 | { "Date", &hf_http_date, HDR_NO_SPECIAL0 },
3351 | { "Cache-Control", &hf_http_cache_control, HDR_NO_SPECIAL0 },
3352 | { "Server", &hf_http_server, HDR_NO_SPECIAL0 },
3353 | { "Location", &hf_http_location, HDR_LOCATION13 },
3354 | { "Sec-WebSocket-Accept", &hf_http_sec_websocket_accept, HDR_NO_SPECIAL0 },
3355 | { "Sec-WebSocket-Extensions", &hf_http_sec_websocket_extensions, HDR_WEBSOCKET_EXTENSIONS11 },
3356 | { "Sec-WebSocket-Key", &hf_http_sec_websocket_key, HDR_NO_SPECIAL0 },
3357 | { "Sec-WebSocket-Protocol", &hf_http_sec_websocket_protocol, HDR_WEBSOCKET_PROTOCOL10 },
3358 | { "Sec-WebSocket-Version", &hf_http_sec_websocket_version, HDR_NO_SPECIAL0 },
3359 | { "Set-Cookie", &hf_http_set_cookie, HDR_NO_SPECIAL0 },
3360 | { "Last-Modified", &hf_http_last_modified, HDR_NO_SPECIAL0 },
3361 | { "X-Forwarded-For", &hf_http_x_forwarded_for, HDR_NO_SPECIAL0 },
3362 | { "HTTP2-Settings", &hf_http_http2_settings, HDR_HTTP2_SETTINGS14 },
3363 | };
3364 |
3365 | /*
3366 | * Look up a header name (assume lower-case header_name).
3367 | */
3368 | static int*
3369 | get_hf_for_header(char* header_name)
3370 | {
3371 | int* hf_id = NULL((void*)0);
3372 |
3373 | if (header_fields_hash && header_name) {
3374 | hf_id = (int*) g_hash_table_lookup(header_fields_hash, header_name);
3375 | } else {
3376 | hf_id = NULL((void*)0);
3377 | }
3378 |
3379 | return hf_id;
3380 | }
3381 |
3382 | /*
3383 | *
3384 | */
3385 | static void
3386 | deregister_header_fields(void)
3387 | {
3388 | if (dynamic_hf) {
3389 | /* Deregister all fields */
3390 | for (unsigned i = 0; i < dynamic_hf_size; i++) {
3391 | proto_deregister_field (proto_http, *(dynamic_hf[i].p_id));
3392 | g_free (dynamic_hf[i].p_id);
3393 | }
3394 |
3395 | proto_add_deregistered_data (dynamic_hf);
3396 | dynamic_hf = NULL((void*)0);
3397 | dynamic_hf_size = 0;
3398 | }
3399 |
3400 | if (header_fields_hash) {
3401 | g_hash_table_destroy (header_fields_hash);
3402 | header_fields_hash = NULL((void*)0);
3403 | }
3404 | }
3405 |
3406 | static void
3407 | header_fields_post_update_cb(void)
3408 | {
3409 | int* hf_id;
3410 | char* header_name;
3411 | char* header_name_key;
3412 |
3413 | deregister_header_fields();
3414 |
3415 | if (num_header_fields) {
3416 | header_fields_hash = g_hash_table_new_full(g_str_hash, g_str_equal, g_free, NULL((void*)0));
3417 | dynamic_hf = g_new0(hf_register_info, num_header_fields)((hf_register_info *) g_malloc0_n ((num_header_fields), sizeof (hf_register_info)));
3418 | dynamic_hf_size = num_header_fields;
3419 |
3420 | for (unsigned i = 0; i < dynamic_hf_size; i++) {
3421 | hf_id = g_new(int,1)((int *) g_malloc_n ((1), sizeof (int)));
3422 | *hf_id = -1;
3423 | header_name = g_strdup(header_fields[i].header_name)g_strdup_inline (header_fields[i].header_name);
3424 | header_name_key = g_ascii_strdown(header_name, -1);
3425 |
3426 | dynamic_hf[i].p_id = hf_id;
3427 | dynamic_hf[i].hfinfo.name = header_name;
3428 | dynamic_hf[i].hfinfo.abbrev = ws_strdup_printf("http.header.%s", header_name)wmem_strdup_printf(((void*)0), "http.header.%s", header_name);
3429 | dynamic_hf[i].hfinfo.type = FT_STRING;
3430 | dynamic_hf[i].hfinfo.display = BASE_NONE;
3431 | dynamic_hf[i].hfinfo.strings = NULL((void*)0);
3432 | dynamic_hf[i].hfinfo.bitmask = 0;
3433 | dynamic_hf[i].hfinfo.blurb = g_strdup(header_fields[i].header_desc)g_strdup_inline (header_fields[i].header_desc);
3434 | HFILL_INIT(dynamic_hf[i])(dynamic_hf[i]).hfinfo.id = -1; (dynamic_hf[i]).hfinfo.parent = 0; (dynamic_hf[i]).hfinfo.ref_type = HF_REF_TYPE_NONE; (dynamic_hf [i]).hfinfo.same_name_prev_id = -1; (dynamic_hf[i]).hfinfo.same_name_next = ((void*)0);;
3435 |
3436 | g_hash_table_insert(header_fields_hash, header_name_key, hf_id);
3437 | }
3438 |
3439 | proto_register_field_array(proto_http, dynamic_hf, dynamic_hf_size);
3440 | }
3441 | }
3442 |
3443 | static void
3444 | header_fields_reset_cb(void)
3445 | {
3446 | deregister_header_fields();
3447 | }
3448 |
3449 | /**
3450 | * Parses the transfer-coding, returning true if everything was fully understood
3451 | * or false when unknown names were encountered.
3452 | */
3453 | static bool_Bool
3454 | http_parse_transfer_coding(const char *value, headers_t *eh_ptr)
3455 | {
3456 | bool_Bool is_fully_parsed = true1;
3457 |
3458 | /* Mark header as set, but with unknown encoding. */
3459 | eh_ptr->transfer_encoding = HTTP_TE_UNKNOWN;
3460 |
3461 | while (*value) {
3462 | /* skip OWS (SP / HTAB) and commas; stop at the end. */
3463 | while (*value == ' ' || *value == '\t' || *value == ',')
3464 | value++;
3465 | if (!*value)
3466 | break;
3467 |
3468 | if (g_str_has_prefix(value, "chunked")(__builtin_constant_p ("chunked")? __extension__ ({ const char * const __str = (value); const char * const __prefix = ("chunked" ); gboolean __result = (0); if (__str == ((void*)0) || __prefix == ((void*)0)) __result = (g_str_has_prefix) (__str, __prefix ); else { const size_t __str_len = strlen (((__str) + !(__str ))); const size_t __prefix_len = strlen (((__prefix) + !(__prefix ))); if (__str_len >= __prefix_len) __result = memcmp (((__str ) + !(__str)), ((__prefix) + !(__prefix)), __prefix_len) == 0 ; } __result; }) : (g_str_has_prefix) (value, "chunked") )) {
3469 | eh_ptr->transfer_encoding_chunked = true1;
3470 | value += sizeof("chunked") - 1;
3471 | continue;
3472 | }
3473 |
3474 | /* For now assume that chunked can only combined with exactly
3475 | * one other (compression) encoding. Anything else is
3476 | * unsupported. */
3477 | if (eh_ptr->transfer_encoding != HTTP_TE_UNKNOWN) {
3478 | /* No more transfer codings are expected. */
3479 | is_fully_parsed = false0;
3480 | break;
3481 | }
3482 |
3483 | if (g_str_has_prefix(value, "compress")(__builtin_constant_p ("compress")? __extension__ ({ const char * const __str = (value); const char * const __prefix = ("compress" ); gboolean __result = (0); if (__str == ((void*)0) || __prefix == ((void*)0)) __result = (g_str_has_prefix) (__str, __prefix ); else { const size_t __str_len = strlen (((__str) + !(__str ))); const size_t __prefix_len = strlen (((__prefix) + !(__prefix ))); if (__str_len >= __prefix_len) __result = memcmp (((__str ) + !(__str)), ((__prefix) + !(__prefix)), __prefix_len) == 0 ; } __result; }) : (g_str_has_prefix) (value, "compress") )) {
3484 | eh_ptr->transfer_encoding = HTTP_TE_COMPRESS;
3485 | value += sizeof("compress") - 1;
3486 | } else if (g_str_has_prefix(value, "deflate")(__builtin_constant_p ("deflate")? __extension__ ({ const char * const __str = (value); const char * const __prefix = ("deflate" ); gboolean __result = (0); if (__str == ((void*)0) || __prefix == ((void*)0)) __result = (g_str_has_prefix) (__str, __prefix ); else { const size_t __str_len = strlen (((__str) + !(__str ))); const size_t __prefix_len = strlen (((__prefix) + !(__prefix ))); if (__str_len >= __prefix_len) __result = memcmp (((__str ) + !(__str)), ((__prefix) + !(__prefix)), __prefix_len) == 0 ; } __result; }) : (g_str_has_prefix) (value, "deflate") )) {
3487 | eh_ptr->transfer_encoding = HTTP_TE_DEFLATE;
3488 | value += sizeof("deflate") - 1;
3489 | } else if (g_str_has_prefix(value, "gzip")(__builtin_constant_p ("gzip")? __extension__ ({ const char * const __str = (value); const char * const __prefix = ("gzip" ); gboolean __result = (0); if (__str == ((void*)0) || __prefix == ((void*)0)) __result = (g_str_has_prefix) (__str, __prefix ); else { const size_t __str_len = strlen (((__str) + !(__str ))); const size_t __prefix_len = strlen (((__prefix) + !(__prefix ))); if (__str_len >= __prefix_len) __result = memcmp (((__str ) + !(__str)), ((__prefix) + !(__prefix)), __prefix_len) == 0 ; } __result; }) : (g_str_has_prefix) (value, "gzip") )) {
3490 | eh_ptr->transfer_encoding = HTTP_TE_GZIP;
3491 | value += sizeof("gzip") - 1;
3492 | } else if (g_str_has_prefix(value, "identity")(__builtin_constant_p ("identity")? __extension__ ({ const char * const __str = (value); const char * const __prefix = ("identity" ); gboolean __result = (0); if (__str == ((void*)0) || __prefix == ((void*)0)) __result = (g_str_has_prefix) (__str, __prefix ); else { const size_t __str_len = strlen (((__str) + !(__str ))); const size_t __prefix_len = strlen (((__prefix) + !(__prefix ))); if (__str_len >= __prefix_len) __result = memcmp (((__str ) + !(__str)), ((__prefix) + !(__prefix)), __prefix_len) == 0 ; } __result; }) : (g_str_has_prefix) (value, "identity") )) {
3493 | eh_ptr->transfer_encoding = HTTP_TE_IDENTITY;
3494 | value += sizeof("identity") - 1;
3495 | } else if (g_str_has_prefix(value, "x-compress")(__builtin_constant_p ("x-compress")? __extension__ ({ const char * const __str = (value); const char * const __prefix = ("x-compress" ); gboolean __result = (0); if (__str == ((void*)0) || __prefix == ((void*)0)) __result = (g_str_has_prefix) (__str, __prefix ); else { const size_t __str_len = strlen (((__str) + !(__str ))); const size_t __prefix_len = strlen (((__prefix) + !(__prefix ))); if (__str_len >= __prefix_len) __result = memcmp (((__str ) + !(__str)), ((__prefix) + !(__prefix)), __prefix_len) == 0 ; } __result; }) : (g_str_has_prefix) (value, "x-compress") )) {
3496 | eh_ptr->transfer_encoding = HTTP_TE_COMPRESS;
3497 | value += sizeof("x-compress") - 1;
3498 | } else if (g_str_has_prefix(value, "x-gzip")(__builtin_constant_p ("x-gzip")? __extension__ ({ const char * const __str = (value); const char * const __prefix = ("x-gzip" ); gboolean __result = (0); if (__str == ((void*)0) || __prefix == ((void*)0)) __result = (g_str_has_prefix) (__str, __prefix ); else { const size_t __str_len = strlen (((__str) + !(__str ))); const size_t __prefix_len = strlen (((__prefix) + !(__prefix ))); if (__str_len >= __prefix_len) __result = memcmp (((__str ) + !(__str)), ((__prefix) + !(__prefix)), __prefix_len) == 0 ; } __result; }) : (g_str_has_prefix) (value, "x-gzip") )) {
3499 | eh_ptr->transfer_encoding = HTTP_TE_GZIP;
3500 | value += sizeof("x-gzip") - 1;
3501 | } else {
3502 | /* Unknown transfer encoding, skip until next comma.
3503 | * Stop when no more names are found. */
3504 | is_fully_parsed = false0;
3505 | value = strchr(value, ',');
3506 | if (!value)
3507 | break;
3508 | }
3509 | }
3510 |
3511 | return is_fully_parsed;
3512 | }
3513 |
3514 | static bool_Bool
3515 | is_token_char(char c)
3516 | {
3517 | /* tchar according to https://tools.ietf.org/html/rfc7230#section-3.2.6 */
3518 | return strchr("!#$%&\\:*+-.^_`|~", c) || g_ascii_isalnum(c)((g_ascii_table[(guchar) (c)] & G_ASCII_ALNUM) != 0);
3519 | }
3520 |
3521 | static bool_Bool
3522 | valid_header_name(const unsigned char *line, unsigned header_len)
3523 | {
3524 |
3525 | /*
3526 | * Validate the header name. This allows no space between the field name
3527 | * and colon (RFC 7230, Section. 3.2.4).
3528 | */
3529 | if (header_len == 0) {
3530 | return false0;
3531 | }
3532 | for (unsigned i = 0; i < header_len; i++) {
3533 | /*
3534 | * NUL is not a valid character; treat it specially
3535 | * due to C's notion that strings are NUL-terminated.
3536 | */
3537 | if (line[i] == '\0') {
3538 | return false0;
3539 | }
3540 | if (!is_token_char(line[i])) {
3541 | return false0;
3542 | }
3543 | }
3544 | return true1;
3545 | }
3546 |
3547 | static bool_Bool
3548 | process_header(tvbuff_t *tvb, unsigned offset, unsigned next_offset,
3549 | const unsigned char *line, unsigned linelen, unsigned colon_offset,
3550 | packet_info *pinfo, proto_tree *tree, headers_t *eh_ptr,
3551 | http_conv_t *conv_data, media_container_type_t http_type, wmem_map_t *header_value_map,
3552 | wmem_allocator_t *header_value_map_allocator, bool_Bool streaming_chunk_mode)
3553 | {
3554 | unsigned len;
3555 | unsigned line_end_offset;
3556 | unsigned header_len;
3557 | int hf_index;
3558 | unsigned char c;
3559 | unsigned value_offset;
3560 | unsigned value_len, value_bytes_len;
3561 | uint8_t *value_bytes;
3562 | char *value;
3563 | char *header_name;
3564 | char *p;
3565 | unsigned char *up;
3566 | proto_item *hdr_item, *it;
3567 | unsigned f;
3568 | int* hf_id;
3569 | tap_credential_t* auth;
3570 | http_req_res_t *curr_req_res = (http_req_res_t *)p_get_proto_data(wmem_file_scope(), pinfo,
3571 | proto_http, HTTP_PROTO_DATA_REQRES0);
3572 | http_info_value_t *stat_info = p_get_proto_data(pinfo->pool, pinfo, proto_http, HTTP_PROTO_DATA_INFO1);
3573 | wmem_allocator_t *scope = (!PINFO_FD_VISITED(pinfo)((pinfo)->fd->visited) && streaming_chunk_mode) ? wmem_file_scope() :
3574 | ((PINFO_FD_VISITED(pinfo)((pinfo)->fd->visited) && streaming_chunk_mode) ? NULL((void*)0) : pinfo->pool);
3575 |
3576 | len = next_offset - offset;
3577 | line_end_offset = offset + linelen;
3578 | header_len = colon_offset - offset;
3579 |
3580 | /**
3581 | * Not a valid header name? Just add a line plus expert info.
3582 | */
3583 | if (!valid_header_name(line, header_len)) {
3584 | if (http_check_ascii_headers) {
3585 | /* If we're offering the chance for other dissectors to parse,
3586 | * we shouldn't add any tree items ourselves.
3587 | */
3588 | return false0;
3589 | }
3590 | if (http_type == MEDIA_CONTAINER_HTTP_REQUEST) {
3591 | hf_index = hf_http_request_line;
3592 | } else if (http_type == MEDIA_CONTAINER_HTTP_RESPONSE) {
3593 | hf_index = hf_http_response_line;
3594 | } else {
3595 | hf_index = hf_http_unknown_header;
3596 | }
3597 | it = proto_tree_add_item(tree, hf_index, tvb, offset, len, ENC_NA0x00000000|ENC_ASCII0x00000000);
3598 | proto_item_set_text(it, "%s", format_text(pinfo->pool, (char*)line, len));
3599 | expert_add_info(pinfo, it, &ei_http_bad_header_name);
3600 | return false0;
3601 | }
3602 |
3603 | /*
3604 | * Make a null-terminated, all-lower-case version of the header
3605 | * name.
3606 | */
3607 | header_name = wmem_ascii_strdown(pinfo->pool, (const char*)&line[0], header_len);
3608 |
3609 | hf_index = find_header_hf_value(tvb, offset, header_len);
3610 |
3611 | /*
3612 | * Skip whitespace after the colon.
3613 | */
3614 | value_offset = colon_offset + 1;
3615 | while (value_offset < line_end_offset
3616 | && ((c = line[value_offset - offset]) == ' ' || c == '\t'))
3617 | value_offset++;
3618 |
3619 | /*
3620 | * Fetch the value.
3621 | *
3622 | * XXX - RFC 9110 5.5 "Specification for newly defined fields
3623 | * SHOULD limit their values to visible US-ASCII octets (VCHAR),
3624 | * SP, and HTAB. A recipient SHOULD treat other allowed octets in
3625 | * field content (i.e., obs-text [%x80-FF]) as opaque data...
3626 | * Field values containing CR, LF, or NUL characters are invalid
3627 | * and dangerous." (Up to RFC 7230, an obsolete "line-folding"
3628 | * mechanism that included CRLF was allowed.)
3629 | *
3630 | * So NUL is not allowed, and we should have one or more
3631 | * expert infos if the field value has anything other than
3632 | * ASCII printable + TAB. (Possibly different severities
3633 | * depending on whether it contains obsolete characters
3634 | * like \x80-\xFF vs characters never allowed like NUL.)
3635 | * All known field types respect this (using Base64, etc.)
3636 | * Unknown field types (possibly including those registered
3637 | * through the UAT) should be treated like FT_BYTES with
3638 | * BASE_SHOW_ASCII_PRINTABLE instead of FT_STRING, but it's
3639 | * more difficult to do that with the custom formatting
3640 | * that uses the header name.
3641 | *
3642 | * Instead, for now for display purposes we will treat strings
3643 | * as ASCII and pass the raw value to subdissectors via the
3644 | * header_value_map. For the latter, we allocate a buffer that's
3645 | * value_bytes_len+1 bytes long, copy value_bytes_len bytes, and
3646 | * stick in a NUL terminator, so that the buffer for value actually
3647 | * has value_bytes_len bytes in it.
3648 | */
3649 | value_bytes_len = line_end_offset - value_offset;
3650 | value_bytes = (uint8_t *)wmem_alloc(PINFO_FD_VISITED(pinfo)((pinfo)->fd->visited) ? pinfo->pool : header_value_map_allocator, value_bytes_len+1);
3651 | memcpy(value_bytes, &line[value_offset - offset], value_bytes_len);
3652 | value_bytes[value_bytes_len] = '\0';
3653 | value = (char*)tvb_get_string_enc(pinfo->pool, tvb, value_offset, value_bytes_len, ENC_ASCII0x00000000);
3654 | /* The length of the value might change after UTF-8 sanitization */
3655 | value_len = (int)strlen(value);
3656 |
3657 | if (!PINFO_FD_VISITED(pinfo)((pinfo)->fd->visited)) { /* Record header if packet was not visited yet */
3658 | wmem_map_insert(header_value_map, wmem_strdup(header_value_map_allocator, header_name), value_bytes);
3659 | }
3660 |
3661 | if (hf_index == -1) {
3662 | /*
3663 | * Not a header we know anything about.
3664 | * Check if a HF generated from UAT information exists.
3665 | */
3666 | hf_id = get_hf_for_header(header_name);
3667 |
3668 | if (tree) {
3669 | if (!hf_id) {
3670 | if (http_type == MEDIA_CONTAINER_HTTP_REQUEST ||
3671 | http_type == MEDIA_CONTAINER_HTTP_RESPONSE) {
3672 | it = proto_tree_add_item(tree,
3673 | http_type == MEDIA_CONTAINER_HTTP_RESPONSE ?
3674 | hf_http_response_line :
3675 | hf_http_request_line,
3676 | tvb, offset, len,
3677 | ENC_NA0x00000000|ENC_ASCII0x00000000);
3678 | proto_item_set_text(it, "%s",
3679 | format_text(pinfo->pool, (char*)line, len));
3680 | } else {
3681 | char* str = format_text(pinfo->pool, (char*)line, len);
3682 | proto_tree_add_string_format(tree, hf_http_unknown_header, tvb, offset,
3683 | len, str, "%s", str);
3684 | }
3685 |
3686 | } else {
3687 | proto_tree_add_string_format(tree,
3688 | *hf_id, tvb, offset, len, value,
3689 | "%s", format_text(pinfo->pool, (char*)line, len));
3690 | if (http_type == MEDIA_CONTAINER_HTTP_REQUEST ||
3691 | http_type == MEDIA_CONTAINER_HTTP_RESPONSE) {
3692 | it = proto_tree_add_item(tree,
3693 | http_type == MEDIA_CONTAINER_HTTP_RESPONSE ?
3694 | hf_http_response_line :
3695 | hf_http_request_line,
3696 | tvb, offset, len,
3697 | ENC_NA0x00000000|ENC_ASCII0x00000000);
3698 | proto_item_set_text(it, "%s",
3699 | format_text(pinfo->pool, (char*)line, len));
3700 | proto_item_set_hidden(it);
3701 | }
3702 | }
3703 | }
3704 | } else {
3705 | /*
3706 | * Add it to the protocol tree as a particular field,
3707 | * but display the line as is.
3708 | */
3709 | if (tree) {
3710 | header_field_info *hfinfo;
3711 | uint32_t tmp;
3712 |
3713 | hfinfo = proto_registrar_get_nth(*headers[hf_index].hf);
3714 | switch(hfinfo->type){
3715 | case FT_UINT8:
3716 | case FT_UINT16:
3717 | case FT_UINT24:
3718 | case FT_UINT32:
3719 | case FT_INT8:
3720 | case FT_INT16:
3721 | case FT_INT24:
3722 | case FT_INT32:
3723 | tmp=(uint32_t)strtol(value, NULL((void*)0), 10);
3724 | hdr_item = proto_tree_add_uint(tree, *headers[hf_index].hf, tvb, offset, len, tmp);
3725 | if (http_type == MEDIA_CONTAINER_HTTP_REQUEST ||
3726 | http_type == MEDIA_CONTAINER_HTTP_RESPONSE) {
3727 | it = proto_tree_add_item(tree,
3728 | http_type == MEDIA_CONTAINER_HTTP_RESPONSE ?
3729 | hf_http_response_line :
3730 | hf_http_request_line,
3731 | tvb, offset, len,
3732 | ENC_NA0x00000000|ENC_ASCII0x00000000);
3733 | proto_item_set_text(it, "%d", tmp);
3734 | proto_item_set_hidden(it);
3735 | }
3736 | break;
3737 | default:
3738 | hdr_item = proto_tree_add_string_format(tree,
3739 | *headers[hf_index].hf, tvb, offset, len,
3740 | value,
3741 | "%s", format_text(pinfo->pool, (char*)line, len));
3742 | if (http_type == MEDIA_CONTAINER_HTTP_REQUEST ||
3743 | http_type == MEDIA_CONTAINER_HTTP_RESPONSE) {
3744 | it = proto_tree_add_item(tree,
3745 | http_type == MEDIA_CONTAINER_HTTP_RESPONSE ?
3746 | hf_http_response_line :
3747 | hf_http_request_line,
3748 | tvb, offset, len,
3749 | ENC_NA0x00000000|ENC_ASCII0x00000000);
3750 | proto_item_set_text(it, "%s",
3751 | format_text(pinfo->pool, (char*)line, len));
3752 | proto_item_set_hidden(it);
3753 | }
3754 | }
3755 | } else
3756 | hdr_item = NULL((void*)0);
3757 |
3758 | /*
3759 | * Do any special processing that particular headers
3760 | * require.
3761 | */
3762 | switch (headers[hf_index].special) {
3763 |
3764 | case HDR_AUTHORIZATION1:
3765 | if (check_auth_ntlmssp(hdr_item, tvb, pinfo, value))
3766 | break; /* dissected NTLMSSP */
3767 | if (check_auth_basic(hdr_item, tvb, pinfo, value))
3768 | break; /* dissected basic auth */
3769 | if (check_auth_citrixbasic(hdr_item, tvb, pinfo, value, offset))
3770 | break; /* dissected citrix basic auth */
3771 | if (check_auth_kerberos(hdr_item, tvb, pinfo, value))
3772 | break;
3773 | if (check_auth_digest(hdr_item, tvb, pinfo, value, offset, value_len))
3774 | break;/* dissected digest basic auth */
3775 | auth = wmem_new0(pinfo->pool, tap_credential_t)((tap_credential_t*)wmem_alloc0((pinfo->pool), sizeof(tap_credential_t )));
3776 | auth->num = pinfo->num;
3777 | auth->password_hf_id = *headers[hf_index].hf;
3778 | auth->proto = "HTTP header auth";
3779 | auth->username = wmem_strdup(pinfo->pool, TAP_CREDENTIALS_PLACEHOLDER"n.a.");
3780 | tap_queue_packet(credentials_tap, pinfo, auth);
3781 | break;
3782 |
3783 | case HDR_AUTHENTICATE2:
3784 | if (check_auth_ntlmssp(hdr_item, tvb, pinfo, value))
3785 | break; /* dissected NTLMSSP */
3786 | check_auth_kerberos(hdr_item, tvb, pinfo, value);
3787 | break;
3788 |
3789 | case HDR_CONTENT_TYPE3:
3790 | if (scope == NULL((void*)0)) { /* identical to (PINFO_FD_VISITED(pinfo) && streaming_chunk_mode) */
3791 | break; /* eh_ptr->content_type[_parameters] must have been set during first scan */
3792 | }
3793 | eh_ptr->content_type = wmem_strdup(scope, value);
3794 |
3795 | for (f = 0; f < value_len; f++) {
3796 | c = value[f];
3797 | if (c == ';' || g_ascii_isspace(c)((g_ascii_table[(guchar) (c)] & G_ASCII_SPACE) != 0)) {
3798 | /*
3799 | * End of subtype - either
3800 | * white space or a ";"
3801 | * separating the subtype from
3802 | * a parameter.
3803 | */
3804 | break;
3805 | }
3806 |
3807 | /*
3808 | * Map the character to lower case;
3809 | * content types are case-insensitive.
3810 | */
3811 | eh_ptr->content_type[f] = g_ascii_tolower(eh_ptr->content_type[f]);
3812 | }
3813 | eh_ptr->content_type[f] = '\0';
3814 | /*
3815 | * Now find the start of the optional parameters;
3816 | * skip the optional white space and the semicolon
3817 | * if this has not been done before.
3818 | */
3819 | f++;
3820 | while (f < value_len) {
3821 | c = eh_ptr->content_type[f];
3822 | if (c == ';' || g_ascii_isspace(c)((g_ascii_table[(guchar) (c)] & G_ASCII_SPACE) != 0))
3823 | /* Skip till start of parameters */
3824 | f++;
3825 | else
3826 | break;
3827 | }
3828 | if (f < value_len)
3829 | eh_ptr->content_type_parameters = eh_ptr->content_type + f;
3830 | else
3831 | eh_ptr->content_type_parameters = NULL((void*)0);
3832 | break;
3833 |
3834 | case HDR_CONTENT_LENGTH4:
3835 | DISSECTOR_ASSERT_HINT(!streaming_chunk_mode, "In streaming chunk mode, there will never be content-length header.")((void) ((!streaming_chunk_mode) ? (void)0 : (proto_report_dissector_bug ("%s:%u: failed assertion \"%s\" (%s)", "epan/dissectors/packet-http.c" , 3835, "!streaming_chunk_mode", "In streaming chunk mode, there will never be content-length header." ))));
3836 | errno(*__errno_location ()) = 0;
3837 | eh_ptr->content_length = g_ascii_strtoll(value, &p, 10);
3838 | up = (unsigned char *)p;
3839 | if (eh_ptr->content_length < 0 ||
3840 | p == value ||
3841 | errno(*__errno_location ()) == ERANGE34 ||
3842 | (*up != '\0' && !g_ascii_isspace(*up)((g_ascii_table[(guchar) (*up)] & G_ASCII_SPACE) != 0))) {
3843 | /*
3844 | * Content length not valid; pretend
3845 | * we don't have it.
3846 | */
3847 | eh_ptr->have_content_length = false0;
3848 | } else {
3849 | proto_tree *header_tree;
3850 | proto_item *tree_item;
3851 | /*
3852 | * We do have a valid content length.
3853 | */
3854 | eh_ptr->have_content_length = true1;
3855 | header_tree = proto_item_add_subtree(hdr_item, ett_http_header_item);
3856 | tree_item = proto_tree_add_uint64(header_tree, hf_http_content_length,
3857 | tvb, offset, len, eh_ptr->content_length);
3858 | proto_item_set_generated(tree_item);
3859 | if (eh_ptr->transfer_encoding != HTTP_TE_NONE) {
3860 | expert_add_info(pinfo, hdr_item, &ei_http_te_and_length);
3861 | }
3862 | }
3863 | break;
3864 |
3865 | case HDR_CONTENT_ENCODING5:
3866 | if (scope == NULL((void*)0)) { /* identical to (PINFO_FD_VISITED(pinfo) && streaming_chunk_mode) */
3867 | break; /* eh_ptr->content_encoding must have been set during first scan */
3868 | }
3869 | eh_ptr->content_encoding = wmem_strndup(scope, value, value_len);
3870 | break;
3871 |
3872 | case HDR_TRANSFER_ENCODING6:
3873 | if (eh_ptr->have_content_length) {
3874 | expert_add_info(pinfo, hdr_item, &ei_http_te_and_length);
3875 | }
3876 | if (!http_parse_transfer_coding(value, eh_ptr)) {
3877 | expert_add_info(pinfo, hdr_item, &ei_http_te_unknown);
3878 | }
3879 | break;
3880 |
3881 | case HDR_HOST7:
3882 | stat_info->http_host = wmem_strndup(pinfo->pool, value, value_len);
3883 | if (!PINFO_FD_VISITED(pinfo)((pinfo)->fd->visited) && curr_req_res) {
3884 | curr_req_res->http_host = wmem_strndup(wmem_file_scope(), value, value_len);
3885 | }
3886 | break;
3887 |
3888 | case HDR_UPGRADE8:
3889 | if (scope == NULL((void*)0)) { /* identical to (PINFO_FD_VISITED(pinfo) && streaming_chunk_mode) */
3890 | break;
3891 | }
3892 | eh_ptr->upgrade = wmem_ascii_strdown(scope, value, value_len);
3893 | break;
3894 |
3895 | case HDR_COOKIE9:
3896 | if (hdr_item) {
3897 | proto_tree *cookie_tree;
3898 | char *part, *part_end;
3899 | int part_len;
3900 |
3901 | cookie_tree = proto_item_add_subtree(hdr_item, ett_http_header_item);
3902 | for (f = 0; f < value_len; ) {
3903 | /* skip whitespace and ';' (terminates at '\0' or earlier) */
3904 | c = value[f];
3905 | while (c == ';' || g_ascii_isspace(c)((g_ascii_table[(guchar) (c)] & G_ASCII_SPACE) != 0))
3906 | c = value[++f];
3907 |
3908 | if (f >= value_len)
3909 | break;
3910 |
3911 | /* find "cookie=foo " in "cookie=foo ; bar" */
3912 | part = value + f;
3913 | part_end = (char *)memchr(part, ';', value_len - f);
3914 | if (part_end)
3915 | part_len =(int)(part_end - part);
3916 | else
3917 | part_len = value_len - f;
3918 |
3919 | /* finally add cookie to tree */
3920 | proto_tree_add_item(cookie_tree, hf_http_cookie_pair,
3921 | tvb, value_offset + f, part_len, ENC_ASCII0x00000000);
3922 | f += part_len;
3923 | }
3924 | }
3925 | break;
3926 |
3927 | case HDR_REFERER12:
3928 | stat_info->referer_uri = wmem_strndup(pinfo->pool, value, value_len);
3929 | break;
3930 |
3931 | case HDR_LOCATION13:
3932 | if (curr_req_res && curr_req_res->request_uri){
3933 | stat_info->location_target = wmem_strndup(pinfo->pool, value, value_len);
3934 | stat_info->location_base_uri = wmem_strdup(pinfo->pool, curr_req_res->full_uri);
3935 | }
3936 | break;
3937 | case HDR_HTTP2_SETTINGS14:
3938 | {
3939 | proto_tree* settings_tree = proto_item_add_subtree(hdr_item, ett_http_http2_settings_item);
3940 | tvbuff_t* new_tvb = base64uri_tvb_to_new_tvb(tvb, value_offset, value_bytes_len);
3941 | add_new_data_source(pinfo, new_tvb, "Base64uri decoded");
3942 | TRY{ except_t *volatile exc; volatile int except_state = 0; static const except_id_t catch_spec[] = { { 1, 0 } }; { struct except_stacknode except_sn; struct except_catch except_ch; except_setup_try(& except_sn, &except_ch, catch_spec, 1); if (_setjmp (except_ch .except_jmp)) *(&exc) = &except_ch.except_obj; else * (&exc) = 0; if(except_state & 1) except_state |= 2; except_state &= ~1; if (except_state == 0 && exc == 0){
3943 | dissect_http2_settings_ext(new_tvb, pinfo, settings_tree, 0);
3944 | } CATCH_ALLif (except_state == 0 && exc != 0 && (except_state |=1)){
3945 | show_exception(tvb, pinfo, settings_tree, EXCEPT_CODE((exc)->except_id.except_code), GET_MESSAGE((exc)->except_message));
3946 | }
3947 | ENDTRYif(!(except_state&1) && exc != 0) except_rethrow( exc); except_free(except_ch.except_obj.except_dyndata); except_pop (); };};
3948 |
3949 | break;
3950 | }
3951 | case HDR_RANGE15:
3952 | {
3953 | /* THIS IS A GET REQUEST
3954 | * Note: GET is the only method that employs ranges.
3955 | * (Unless the data has errors or is noncompliant.)
3956 | */
3957 | if (curr_req_res && !pinfo->fd->visited) {
3958 | /*
3959 | * Unlike protocols such as NFS and SMB, the HTTP protocol (RFC 9110) does not
3960 | * provide an identifier with which to match requests and responses. Instead,
3961 | * matching is solely based upon the order in which responses are received.
3962 | * HTTP I/O is 'asynchronously ordered' such that, for example, the first of four
3963 | * GET responses are matched with the first outstanding request, the next
3964 | * response with the second oldest outstanding request and so on (FIFO).
3965 | * The previous method instead matched responses with the last of several
3966 | * async requests rather than the first (LIFO), and did not handle requests
3967 | * with no responses such as the case where one or more HTTP packets were
3968 | * not captured. Whenever there were multiple outstanding requests, the SRT
3969 | * (RTT) stats were incorrect, in some cases massively so.
3970 | *
3971 | * While RFC 9110 expressly prohibits matching via byte ranges because, among
3972 | * other things, the server may return fewer bytes than requested,
3973 | * the first number of the range does not change. Unlike HTTP implementations,
3974 | * Wireshark has the problem of requests/responses missing from the capture
3975 | * file. In such cases resumption of correct matching was virtually impossible.
3976 | * In addition, all matching was incorrect from that point on.
3977 | *
3978 | * The method of matching used herein is able to recover from packet loss,
3979 | * any number of missing frames, and duplicate range requests. The
3980 | * method used is explained within the comments.
3981 | */
3982 | /* https://www.rfc-editor.org/rfc/rfc9110.html#name-range-requests
3983 | * Note that RFC 9110 16.5 defines a registry for
3984 | * range units, but only bytes are registered.
3985 | * ABNF:
3986 | * Range = ranges-specifier
3987 | * ranges-specifier = range-unit "=" range-set
3988 | * range-set = 1#range-spec
3989 | * range-spec = int-range / suffix-range / other-range
3990 | * 1# is an ABNF extension defined in RFC 9110 5.6.1
3991 | * which covers comma separated list with optional
3992 | * white space:
3993 | * 1#element => element *( OWS "," OWS element )
3994 | * We don't care about other-range, but will try to
3995 | * handle int-range and suffix-range.
3996 | * This ignores any entries past the first in a list,
3997 | * though responses to such would be multipart.
3998 | * As mentioned above, this breaks down if the
3999 | * response does not include all requested ranges
4000 | * fully in one response.
4001 | */
4002 | const char *pos = strchr(value, '=');
4003 | if (pos == NULL((void*)0)) {
4004 | break;
4005 | }
4006 | pos++;
4007 | uint64_t first_range_num = 0;
4008 | /* Get the first range number */
4009 | ws_strtou64(pos, &pos, &first_range_num);
4010 | /* If the first number of the range is missing or '0',
4011 | * use the second number in the range instead if we can.
4012 | * XXX - Unlike strtoul, we can check the return value
4013 | * of ws_strtou64() to distinguish between "converted
4014 | * successfully as 0" and "failed conversion."
4015 | * Note that strtoul allows an unsigned integer to
4016 | * begin with a negative sign and applies unsigned
4017 | * integer wraparound rules.
4018 | * ws_strtouXX rejects an initial hyphen-minus, which
4019 | * is good, as we want to properly handle:
4020 | * suffix-range = "-" suffix-length
4021 | */
4022 | if (first_range_num == 0 && *pos == '-') {
4023 | pos++;
4024 | /* Pass in an end pointer to convert
4025 | * a list of ranges, the first of which is
4026 | * a suffix-range.
4027 | */
4028 | ws_strtou64(pos, &pos, &first_range_num);
4029 | }
4030 | /* req_list is used for req/resp matching and the deletion (and freeing) of matching
4031 | * requests and any orphans that precede them. A GSList is used instead of a wmem map
4032 | * because there are rarely more than 10 requests in the list."
4033 | */
4034 | if (first_range_num > 0) {
4035 | request_trans_t* req_trans = wmem_new(wmem_file_scope(), request_trans_t)((request_trans_t*)wmem_alloc((wmem_file_scope()), sizeof(request_trans_t )));
4036 | req_trans->first_range_num = first_range_num;
4037 | req_trans->req_frame = pinfo->num;
4038 | req_trans->abs_time = pinfo->fd->abs_ts;
4039 | req_trans->request_uri = curr_req_res->request_uri;
4040 |
4041 | /* XXX - This leaks if matching responses aren't
4042 | * found (the data does not, but the list node
4043 | * does.) A wmem_list would prevent that.
4044 | */
4045 | conv_data->req_list = g_slist_append(conv_data->req_list, req_trans);
4046 | curr_req_res->req_has_range = true1;
4047 | }
4048 | }
4049 |
4050 | break;
4051 | }
4052 | case HDR_CONTENT_RANGE16:
4053 | /*
4054 | * THIS IS A GET RESPONSE
4055 | * GET is the only method that employs ranges.
4056 | * XXX - Except that RFC 9110 14.4 & 14.5 note that by
4057 | * private agreement it can be included in a request
4058 | * to request a partial PUT.
4059 | * ABNF:
4060 | * Content-Range = range-unit SP ( range-resp / unsatisfied-range )
4061 | * range-resp = incl-range "/" ( complete-length / "*" )
4062 | * We do not attempt to handle unsatisfied-range.
4063 | * Note that only one range can be included; multiple
4064 | * ranges are transmitted with the media type of
4065 | * "multipart/byteranges" and each body part contains
4066 | * its own Content-Type and Content-Range fields.
4067 | * The multipart dissector does not handle this nor
4068 | * access the request list.
4069 | */
4070 | if (curr_req_res && !pinfo->fd->visited) {
4071 | request_trans_t *req_trans;
4072 | match_trans_t *match_trans = NULL((void*)0);
4073 | nstime_t ns;
4074 | GSList *iter = NULL((void*)0);
4075 |
4076 | /* Note SP instead of '=' in ABNF. */
4077 | const char *pos = strchr(value, ' ');
4078 | if (pos == NULL((void*)0)) {
4079 | break;
4080 | }
4081 | pos++;
4082 | uint64_t first_crange_num = 0;
4083 | /* Get the first content range number */
4084 | ws_strtou64(pos, &pos, &first_crange_num);
4085 |
4086 | if (first_crange_num == 0 && *pos == '-') {
4087 | pos++;
4088 | ws_strtou64(pos, &pos, &first_crange_num);
4089 | }
4090 |
4091 | /* Get the position of the matching request if any in the reqs_table.
4092 | * This is used to remove and free the matching request, and the unmatched
4093 | * requests (orphans) that precede it.
4094 | * XXX - There is *NO* guarantee that there is
4095 | * a perfectly matching request, see 15.3.7:
4096 | * "However, a server might want to send only a
4097 | * subset of the data requested for reasons of
4098 | * its own... A client MUST inspect a 206
4099 | * response's Content-Type and Content-Range
4100 | * field(s) to determine what parts are enclosed
4101 | * and whether additional requests are needed."
4102 | * Also 15.3.7.2 Multiple Parts, noting that
4103 | * the response may be sent in a Content-Type
4104 | * multipart/byteranges, also "When multiple
4105 | * ranges are requested, a server MAY coalesce
4106 | * any of the ranges that overlap, or that are
4107 | * separated by a gap that is smaller than the
4108 | * overhead of sending multiple parts, regardless
4109 | * of the order in which the corresponding range-
4110 | * spec appeared in the received Range header
4111 | * field." and 15.3.7.3 Combining Parts.
4112 | * However, as mentioned above, the LIFO method
4113 | * had issues with that as well. Truly proper
4114 | * handling of such edge cases is more difficult.
4115 | */
4116 | req_trans = NULL((void*)0);
4117 | if (conv_data->req_list && conv_data->req_list->data) {
4118 | for (iter = conv_data->req_list; iter; iter = iter->next) {
4119 | if (((request_trans_t*)iter->data)->first_range_num == first_crange_num) {
4120 | req_trans = iter->data;
4121 | break;
4122 | }
4123 | }
4124 | }
4125 |
4126 | if (first_crange_num != 0 && req_trans) {
4127 | match_trans = wmem_new(wmem_file_scope(), match_trans_t)((match_trans_t*)wmem_alloc((wmem_file_scope()), sizeof(match_trans_t )));
4128 | match_trans->req_frame = req_trans->req_frame;
4129 | match_trans->resp_frame = pinfo->num;
4130 | nstime_delta(&ns, &pinfo->fd->abs_ts, &req_trans->abs_time);
4131 | match_trans->delta_time = ns;
4132 | match_trans->request_uri = req_trans->request_uri;
4133 | match_trans->http_host = curr_req_res->http_host;
4134 |
4135 | wmem_map_insert(conv_data->matches_table,
4136 | GUINT_TO_POINTER(match_trans->req_frame)((gpointer) (gulong) (match_trans->req_frame)), (void *)match_trans);
4137 | wmem_map_insert(conv_data->matches_table,
4138 | GUINT_TO_POINTER(match_trans->resp_frame)((gpointer) (gulong) (match_trans->resp_frame)), (void *)match_trans);
4139 |
4140 | /* Remove and free all of the list entries up to and including the
4141 | * matching one from req_list. */
4142 | if (conv_data->req_list) {
4143 | GSList *top_of_list = NULL((void*)0);
4144 |
4145 | top_of_list = conv_data->req_list;
4146 | while (top_of_list && top_of_list->data != req_trans) {
4147 |
4148 | top_of_list = g_slist_delete_link(top_of_list, top_of_list);
4149 | }
4150 | if (top_of_list && top_of_list->data == req_trans) {
4151 |
4152 | top_of_list = g_slist_delete_link(top_of_list, top_of_list);
4153 | }
4154 | conv_data->req_list = top_of_list;
4155 | }
4156 | }
4157 | }
4158 | if (curr_req_res)
4159 | curr_req_res->resp_has_range = true1;
4160 | break;
4161 | }
4162 | }
4163 | return true1;
4164 | }
4165 |
4166 | /* Returns index of header tag in headers */
4167 | static int
4168 | find_header_hf_value(tvbuff_t *tvb, unsigned offset, unsigned header_len)
4169 | {
4170 | unsigned i;
4171 |
4172 | for (i = 0; i < array_length(headers)(sizeof (headers) / sizeof (headers)[0]); i++) {
4173 | if (header_len == strlen(headers[i].name) &&
4174 | tvb_strncaseeql(tvb, offset,
4175 | headers[i].name, header_len) == 0)
4176 | return i;
4177 | }
4178 |
4179 | return -1;
4180 | }
4181 |
4182 | /*
4183 | * Dissect Microsoft's abomination called NTLMSSP over HTTP.
4184 | */
4185 | static bool_Bool
4186 | check_auth_ntlmssp(proto_item *hdr_item, tvbuff_t *tvb, packet_info *pinfo, char *value)
4187 | {
4188 | static const char *ntlm_headers[] = {
4189 | "NTLM ",
4190 | "Negotiate ",
4191 | NULL((void*)0)
4192 | };
4193 | const char **header;
4194 | size_t hdrlen;
4195 | proto_tree *hdr_tree;
4196 |
4197 | /*
4198 | * Check for NTLM credentials and challenge; those can
4199 | * occur with WWW-Authenticate.
4200 | */
4201 | for (header = &ntlm_headers[0]; *header != NULL((void*)0); header++) {
4202 | hdrlen = strlen(*header);
4203 | if (strncmp(value, *header, hdrlen) == 0) {
4204 | hdr_tree = proto_item_add_subtree(hdr_item,
4205 | ett_http_ntlmssp);
4206 | value += hdrlen;
4207 | dissect_http_ntlmssp(tvb, pinfo, hdr_tree, value);
4208 | return true1;
4209 | }
4210 | }
4211 | return false0;
4212 | }
4213 |
4214 | static tap_credential_t*
4215 | basic_auth_credentials(wmem_allocator_t *scope, const char* str)
4216 | {
4217 | char **tokens = g_strsplit(str, ":", -1);
4218 |
4219 | if (!tokens || !tokens[0] || !tokens[1]) {
4220 | g_strfreev(tokens);
4221 | return NULL((void*)0);
4222 | }
4223 |
4224 | tap_credential_t* auth = wmem_new0(scope, tap_credential_t)((tap_credential_t*)wmem_alloc0((scope), sizeof(tap_credential_t )));
4225 |
4226 | auth->username = wmem_strdup(scope, tokens[0]);
4227 | auth->proto = "HTTP basic auth";
4228 |
4229 | g_strfreev(tokens);
4230 |
4231 | return auth;
4232 | }
4233 |
4234 | /*
4235 | * Dissect HTTP Basic authorization.
4236 | */
4237 | static bool_Bool
4238 | check_auth_basic(proto_item *hdr_item, tvbuff_t *tvb, packet_info *pinfo, char *value)
4239 | {
4240 | static const char *basic_headers[] = {
4241 | "Basic ",
4242 | NULL((void*)0)
4243 | };
4244 | const char **header;
4245 | size_t hdrlen;
4246 | const char *decoded_value;
4247 | proto_tree *hdr_tree;
4248 | tvbuff_t *auth_tvb;
4249 |
4250 | for (header = &basic_headers[0]; *header != NULL((void*)0); header++) {
4251 | hdrlen = strlen(*header);
4252 | if (strncmp(value, *header, hdrlen) == 0) {
4253 | hdr_tree = proto_item_add_subtree(hdr_item,
4254 | ett_http_ntlmssp);
4255 | value += hdrlen;
4256 |
4257 | auth_tvb = base64_to_tvb(tvb, value);
4258 | add_new_data_source(pinfo, auth_tvb, "Basic Credentials");
4259 | /* RFC 7617 says that the character encoding is only
4260 | * known to be UTF-8 if the 'charset' parameter was
4261 | * used. Otherwise, after Base64 decoding it could be
4262 | * any character encoding.
4263 | * XXX: Perhaps the field should be a FT_BYTES with
4264 | * BASE_SHOW_UTF_8_PRINTABLE?
4265 | */
4266 | proto_tree_add_item_ret_string(hdr_tree, hf_http_basic, auth_tvb, 0, tvb_reported_length(auth_tvb), ENC_UTF_80x00000002, pinfo->pool, (const uint8_t**)&decoded_value);
4267 | tap_credential_t* auth = basic_auth_credentials(pinfo->pool, decoded_value);
4268 | if (auth) {
4269 | auth->num = auth->username_num = pinfo->num;
4270 | auth->password_hf_id = hf_http_basic;
4271 | tap_queue_packet(credentials_tap, pinfo, auth);
4272 | }
4273 |
4274 | return true1;
4275 | }
4276 | }
4277 | return false0;
4278 | }
4279 |
4280 | /*
4281 | * Dissect HTTP Digest authorization.
4282 | */
4283 | static bool_Bool
4284 | check_auth_digest(proto_item* hdr_item, tvbuff_t* tvb, packet_info* pinfo _U___attribute__((unused)), char* value, unsigned offset, unsigned len)
4285 | {
4286 | proto_tree* hdr_tree;
4287 | unsigned queried_offset;
4288 |
4289 | if (strncmp(value, "Digest", 6) == 0) {
4290 | hdr_tree = proto_item_add_subtree(hdr_item, ett_http_ntlmssp);
4291 | tvbuff_t *digest_tvb = tvb_new_subset_length(tvb, offset, len);
4292 | offset = 21; // strlen("Authorization: Digest");
4293 | while (tvb_captured_length_remaining(digest_tvb, offset)) {
4294 | /* Find comma/end of line */
4295 | tvb_find_uint8_remaining(digest_tvb, offset, ',', &queried_offset);
4296 | proto_tree_add_format_text(hdr_tree, digest_tvb, offset, queried_offset - offset);
4297 | offset = queried_offset + 1;
4298 | }
4299 | return true1;
4300 | } else {
4301 | return false0;
4302 | }
4303 | }
4304 | /*
4305 | * Dissect HTTP CitrixAGBasic authorization.
4306 | */
4307 | static bool_Bool
4308 | check_auth_citrixbasic(proto_item *hdr_item, tvbuff_t *tvb, packet_info *pinfo, char *value, unsigned offset)
4309 | {
4310 | static const char *basic_headers[] = {
4311 | "CitrixAGBasic ",
4312 | NULL((void*)0)
4313 | };
4314 | const char **header;
4315 | size_t hdrlen;
4316 | proto_tree *hdr_tree;
4317 | char *ch_ptr;
4318 | unsigned data_len;
4319 | tvbuff_t *data_tvb;
4320 | proto_item *hidden_item;
4321 | proto_item *pi;
4322 | const uint8_t *user = NULL((void*)0), *passwd = NULL((void*)0);
4323 |
4324 | for (header = &basic_headers[0]; *header != NULL((void*)0); header++) {
4325 | hdrlen = strlen(*header);
4326 | if (strncmp(value, *header, hdrlen) == 0) {
4327 | hdr_tree = proto_item_add_subtree(hdr_item,
4328 | ett_http_ntlmssp);
4329 | value += hdrlen;
4330 | offset += (unsigned)hdrlen + 15;
4331 | hidden_item = proto_tree_add_boolean(hdr_tree,
4332 | hf_http_citrix, tvb, 0, 0, 1);
4333 | proto_item_set_hidden(hidden_item);
4334 |
4335 | if(strncmp(value, "username=\"", 10) == 0) {
4336 | value += 10;
4337 | offset += 10;
4338 | ch_ptr = strchr(value, '"');
4339 | if ( ch_ptr != NULL((void*)0) ) {
4340 | data_len = (unsigned)(ch_ptr - value);
4341 | if (data_len) {
4342 | data_tvb = base64_tvb_to_new_tvb(tvb, offset, data_len);
4343 | add_new_data_source(pinfo, data_tvb, "Username");
4344 | /* XXX: We don't know for certain the string encoding here. */
4345 | pi = proto_tree_add_item_ret_string(hdr_tree, hf_http_citrix_user, data_tvb, 0, tvb_reported_length(data_tvb), ENC_UTF_80x00000002, pinfo->pool, &user);
4346 | } else {
4347 | pi = proto_tree_add_string(hdr_tree, hf_http_citrix_user, tvb, offset, 0, "");
4348 | }
4349 | proto_item_set_generated(pi);
4350 | value += data_len + 1;
4351 | offset += data_len + 1;
4352 | }
4353 | }
4354 | if(strncmp(value, "; domain=\"", 10) == 0) {
4355 | value += 10;
4356 | offset += 10;
4357 | ch_ptr = strchr(value, '"');
4358 | if ( ch_ptr != NULL((void*)0) ) {
4359 | data_len = (unsigned)(ch_ptr - value);
4360 | if (data_len) {
4361 | data_tvb = base64_tvb_to_new_tvb(tvb, offset, data_len);
4362 | add_new_data_source(pinfo, data_tvb, "Domain");
4363 | pi = proto_tree_add_item(hdr_tree, hf_http_citrix_domain, data_tvb, 0, tvb_reported_length(data_tvb), ENC_UTF_80x00000002);
4364 | } else {
4365 | pi = proto_tree_add_string(hdr_tree, hf_http_citrix_domain, tvb, offset, 0, "");
4366 | }
4367 | proto_item_set_generated(pi);
4368 | value += data_len + 1;
4369 | offset += data_len + 1;
4370 | }
4371 | }
4372 | if(strncmp(value, "; password=\"", 12) == 0) {
4373 | value += 12;
4374 | offset += 12;
4375 | ch_ptr = strchr(value, '"');
4376 | if ( ch_ptr != NULL((void*)0) ) {
4377 | data_len = (unsigned)(ch_ptr - value);
4378 | if (data_len) {
4379 | data_tvb = base64_tvb_to_new_tvb(tvb, offset, data_len);
4380 | add_new_data_source(pinfo, data_tvb, "Password");
4381 | pi = proto_tree_add_item_ret_string(hdr_tree, hf_http_citrix_passwd, data_tvb, 0, tvb_reported_length(data_tvb), ENC_UTF_80x00000002, pinfo->pool, &passwd);
4382 | } else {
4383 | pi = proto_tree_add_string(hdr_tree, hf_http_citrix_passwd, tvb, offset, 0, "");
4384 | }
4385 | proto_item_set_generated(pi);
4386 | value += data_len + 1;
4387 | offset += data_len + 1;
4388 | }
4389 | }
4390 | if(strncmp(value, "; AGESessionId=\"", 16) == 0) {
4391 | value += 16;
4392 | offset += 16;
4393 | ch_ptr = strchr(value, '"');
4394 | if ( ch_ptr != NULL((void*)0) ) {
4395 | data_len = (unsigned)(ch_ptr - value);
4396 | if (data_len) {
4397 | data_tvb = base64_tvb_to_new_tvb(tvb, offset, data_len);
4398 | add_new_data_source(pinfo, data_tvb, "Session ID");
4399 | pi = proto_tree_add_item(hdr_tree, hf_http_citrix_session, data_tvb, 0, tvb_reported_length(data_tvb), ENC_UTF_80x00000002);
4400 | } else {
4401 | pi = proto_tree_add_string(hdr_tree, hf_http_citrix_session, tvb,
4402 | offset, 0, "");
4403 | }
4404 | proto_item_set_generated(pi);
4405 | }
4406 | }
4407 | if (user != NULL((void*)0) && passwd != NULL((void*)0)) {
4408 |
4409 | tap_credential_t* auth = wmem_new0(pinfo->pool, tap_credential_t)((tap_credential_t*)wmem_alloc0((pinfo->pool), sizeof(tap_credential_t )));
4410 |
4411 | auth->username = wmem_strdup(pinfo->pool, (char*)user);
4412 | auth->proto = "HTTP CitrixAGBasic auth";
4413 | auth->num = auth->username_num = pinfo->num;
4414 | auth->password_hf_id = hf_http_citrix_passwd;
4415 | tap_queue_packet(credentials_tap, pinfo, auth);
4416 | }
4417 | return true1;
4418 | }
4419 | }
4420 | return false0;
4421 | }
4422 |
4423 | static bool_Bool
4424 | check_auth_kerberos(proto_item *hdr_item, tvbuff_t *tvb, packet_info *pinfo, const char *value)
4425 | {
4426 | proto_tree *hdr_tree;
4427 |
4428 | if (strncmp(value, "Kerberos ", 9) == 0) {
4429 | hdr_tree = proto_item_add_subtree(hdr_item, ett_http_kerberos);
4430 | dissect_http_kerberos(tvb, pinfo, hdr_tree, value);
4431 | return true1;
4432 | }
4433 | return false0;
4434 | }
4435 |
4436 | static int
4437 | dissect_http_on_stream(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree,
4438 | http_conv_t *conv_data, bool_Bool end_of_stream, const uint32_t *seq)
4439 | {
4440 | unsigned offset = 0;
4441 | int len = 0;
4442 |
4443 | while (tvb_reported_length_remaining(tvb, offset) > 0) {
4444 | /* Switch protocol if the data starts after response headers. */
4445 | if (conv_data->startframe &&
4446 | (pinfo->num > conv_data->startframe ||
4447 | (pinfo->num == conv_data->startframe && offset >= conv_data->startoffset))) {
4448 | /* Increase pinfo->can_desegment because we are traversing
4449 | * http and want to preserve desegmentation functionality for
4450 | * the proxied protocol
4451 | */
4452 | if (pinfo->can_desegment > 0)
4453 | pinfo->can_desegment++;
4454 | if (conv_data->next_handle) {
4455 | conv_data->upgrade_info->from_server = pinfo->srcport == conv_data->server_port && addresses_equal(
4456 | &pinfo->src, &conv_data->server_addr);
4457 | call_dissector_only(conv_data->next_handle, tvb_new_subset_remaining(tvb, offset), pinfo, tree, conv_data->upgrade_info);
4458 | } else {
4459 | call_data_dissector(tvb_new_subset_remaining(tvb, offset), pinfo, tree);
4460 | }
4461 | /*
4462 | * If a subdissector requests reassembly, be sure not to
4463 | * include the preceding HTTP headers.
4464 | */
4465 | if (pinfo->desegment_len) {
4466 | pinfo->desegment_offset += offset;
4467 | }
4468 | break;
4469 | }
4470 | len = dissect_http_message(tvb, offset, pinfo, tree, conv_data, "HTTP", proto_http, end_of_stream, seq);
4471 | if (len < 0)
4472 | break;
4473 | offset += len;
4474 |
4475 | /*
4476 | * OK, we've set the Protocol and Info columns for the
4477 | * first HTTP message; set a fence so that subsequent
4478 | * HTTP messages don't overwrite the Info column.
4479 | */
4480 | col_set_fence(pinfo->cinfo, COL_INFO);
4481 | }
4482 | /* dissect_http_message() returns -2 if message is not valid HTTP */
4483 | return (len == -2)
4484 | ? 0
4485 | : (int)tvb_captured_length(tvb);
4486 | }
4487 |
4488 | static int
4489 | dissect_http_tcp(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, void* data)
4490 | {
4491 | struct tcpinfo *tcpinfo = (struct tcpinfo *)data;
4492 | conversation_t *conversation;
4493 | http_conv_t *conv_data;
4494 | bool_Bool end_of_stream;
4495 |
4496 | conv_data = get_http_conversation_data(pinfo, &conversation);
4497 |
4498 | /* Call HTTP2 dissector directly when detected via heuristics, but not
4499 | * when it was upgraded (the conversation started with HTTP). */
4500 | if (conversation_get_proto_data(conversation, proto_http2) &&
4501 | !conv_data->startframe) {
4502 | if (pinfo->can_desegment > 0)
4503 | pinfo->can_desegment++;
4504 | return call_dissector_only(http2_handle, tvb, pinfo, tree, data);
4505 | }
4506 |
4507 | /*
4508 | * Check if this is proxied connection and if so, hand of dissection to the
4509 | * payload-dissector.
4510 | * Response code 200 means "OK" and strncmp() == 0 means the strings match exactly */
4511 | if(http_conversation_is_connect(conversation, pinfo->num)) {
4512 | if (conv_data->startframe == 0 && !PINFO_FD_VISITED(pinfo)((pinfo)->fd->visited)) {
4513 | conv_data->startframe = pinfo->num;
4514 | conv_data->startoffset = 0;
4515 | copy_address_wmem(wmem_file_scope(), &conv_data->server_addr, &pinfo->dst);
4516 | conv_data->server_port = pinfo->destport;
4517 | }
4518 | http_payload_subdissector(tvb, tree, pinfo, conv_data, data);
4519 |
4520 | return tvb_captured_length(tvb);
4521 | }
4522 |
4523 | /* XXX - how to detect end-of-stream without tcpinfo */
4524 | end_of_stream = (tcpinfo && IS_TH_FIN(tcpinfo->flags)(tcpinfo->flags & 0x001));
4525 | return dissect_http_on_stream(tvb, pinfo, tree, conv_data, end_of_stream, tcpinfo ? &tcpinfo->seq : NULL((void*)0));
4526 | }
4527 |
4528 | static bool_Bool
4529 | dissect_http_heur_tcp(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, void *data)
4530 | {
4531 | unsigned offset = 0, next_offset, linelen;
4532 | bool_Bool found;
4533 | conversation_t *conversation;
4534 |
4535 |
4536 | /* Check if we have a line terminated by CRLF
4537 | * Return the length of the line (not counting the line terminator at
4538 | * the end), or, if we don't find a line terminator:
4539 | *
4540 | * if "deseg" is true, return -1;
4541 | */
4542 | found = tvb_find_line_end_remaining(tvb, offset, &linelen , &next_offset);
4543 | if((found == false0)||(linelen == 8)){
4544 | return false0;
4545 | }
4546 |
4547 | /* Check if the line start or ends with the HTTP token */
4548 | if((tvb_strncaseeql(tvb, linelen-8, "HTTP/1.", 7) == 0)||(tvb_strncaseeql(tvb, 0, "HTTP/1.", 7) == 0)){
4549 | conversation = find_or_create_conversation(pinfo);
4550 | conversation_set_dissector_from_frame_number(conversation, pinfo->num, http_tcp_handle);
4551 | dissect_http_tcp(tvb, pinfo, tree, data);
4552 | return true1;
4553 | }
4554 |
4555 | return false0;
4556 | }
4557 |
4558 | static int
4559 | dissect_http_tls(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, void* data)
4560 | {
4561 | conversation_t *conversation;
4562 | http_conv_t *conv_data;
4563 | bool_Bool end_of_stream;
4564 |
4565 | conv_data = get_http_conversation_data(pinfo, &conversation);
4566 |
4567 | struct tlsinfo *tlsinfo = (struct tlsinfo *)data;
4568 | end_of_stream = (tlsinfo && tlsinfo->end_of_stream);
4569 | return dissect_http_on_stream(tvb, pinfo, tree, conv_data, end_of_stream, tlsinfo ? &tlsinfo->seq : NULL((void*)0));
4570 | }
4571 |
4572 | static bool_Bool
4573 | dissect_http_heur_tls(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, void *data)
4574 | {
4575 | unsigned offset = 0, next_offset, linelen;
4576 | conversation_t *conversation;
4577 | http_conv_t *conv_data;
4578 |
4579 | conversation = find_or_create_conversation(pinfo);
4580 | conv_data = (http_conv_t *)conversation_get_proto_data(conversation, proto_http);
4581 | /* A http conversation was previously started, assume it is still active */
4582 | if (conv_data) {
4583 | dissect_http_tls(tvb, pinfo, tree, data);
4584 | return true1;
4585 | }
4586 |
4587 | /* Check if we have a line terminated by CRLF
4588 | * Return the length of the line (not counting the line terminator at
4589 | * the end), or, if we don't find a line terminator:
4590 | *
4591 | * if "deseg" is true, return -1;
4592 | */
4593 | bool_Bool found = tvb_find_line_end_remaining(tvb, offset, &linelen, &next_offset);
4594 | if((found == false0)||(linelen == 8)){
4595 | return false0;
4596 | }
4597 |
4598 | /* Check if the line start or ends with the HTTP token */
4599 | if((tvb_strncaseeql(tvb, linelen-8, "HTTP/1.", 7) != 0) && (tvb_strncaseeql(tvb, 0, "HTTP/1.", 7) != 0)) {
4600 | /* we couldn't find the Magic Hello HTTP/1.X. */
4601 | return false0;
4602 | }
4603 |
4604 | dissect_http_tls(tvb, pinfo, tree, data);
4605 | return true1;
4606 | }
4607 |
4608 | static int
4609 | dissect_http_sctp(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, void* data _U___attribute__((unused)))
4610 | {
4611 | conversation_t *conversation;
4612 | http_conv_t *conv_data;
4613 |
4614 | conv_data = get_http_conversation_data(pinfo, &conversation);
4615 |
4616 | /*
4617 | * XXX - we need to provide an end-of-stream indication.
4618 | */
4619 | return dissect_http_on_stream(tvb, pinfo, tree, conv_data, false0, NULL((void*)0));
4620 | }
4621 |
4622 | static int
4623 | dissect_http(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, void* data _U___attribute__((unused)))
4624 | {
4625 | conversation_t *conversation;
4626 | http_conv_t *conv_data;
4627 |
4628 | conv_data = get_http_conversation_data(pinfo, &conversation);
4629 |
4630 | /*
4631 | * XXX - what should be done about reassembly, pipelining, etc.
4632 | * here?
4633 | */
4634 | return dissect_http_on_stream(tvb, pinfo, tree, conv_data, false0, NULL((void*)0));
4635 | }
4636 |
4637 | static int
4638 | dissect_ssdp(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, void* data _U___attribute__((unused)))
4639 | {
4640 | conversation_t *conversation;
4641 | http_conv_t *conv_data;
4642 |
4643 | conv_data = get_http_conversation_data(pinfo, &conversation);
4644 | dissect_http_message(tvb, 0, pinfo, tree, conv_data, "SSDP", proto_ssdp, false0, NULL((void*)0));
4645 | return tvb_captured_length(tvb);
4646 | }
4647 |
4648 | static void
4649 | range_delete_http_tls_callback(uint32_t port, void *ptr _U___attribute__((unused))) {
4650 | ssl_dissector_delete(port, http_tls_handle);
4651 | }
4652 |
4653 | static void
4654 | range_add_http_tls_callback(uint32_t port, void *ptr _U___attribute__((unused))) {
4655 | ssl_dissector_add(port, http_tls_handle);
4656 | }
4657 |
4658 | static void reinit_http(void) {
4659 | http_tcp_range = prefs_get_range_value("http", "tcp.port");
4660 |
4661 | http_sctp_range = prefs_get_range_value("http", "sctp.port");
4662 |
4663 | range_foreach(http_tls_range, range_delete_http_tls_callback, NULL((void*)0));
4664 | wmem_free(wmem_epan_scope(), http_tls_range);
4665 | http_tls_range = range_copy(wmem_epan_scope(), global_http_tls_range);
4666 | range_foreach(http_tls_range, range_add_http_tls_callback, NULL((void*)0));
4667 | }
4668 |
4669 | void
4670 | proto_register_http(void)
4671 | {
4672 | static hf_register_info hf[] = {
4673 | { &hf_http_notification,
4674 | { "Notification", "http.notification",
4675 | FT_BOOLEAN, BASE_NONE, NULL((void*)0), 0x0,
4676 | "true if HTTP notification", HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
4677 | { &hf_http_response,
4678 | { "Response", "http.response",
4679 | FT_BOOLEAN, BASE_NONE, NULL((void*)0), 0x0,
4680 | "true if HTTP response", HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
4681 | { &hf_http_request,
4682 | { "Request", "http.request",
4683 | FT_BOOLEAN, BASE_NONE, NULL((void*)0), 0x0,
4684 | "true if HTTP request", HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
4685 | { &hf_http_basic,
4686 | { "Credentials", "http.authbasic",
4687 | FT_STRING, BASE_NONE, NULL((void*)0), 0x0, NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
4688 | { &hf_http_citrix,
4689 | { "Citrix AG Auth", "http.authcitrix",
4690 | FT_BOOLEAN, BASE_NONE, NULL((void*)0), 0x0,
4691 | "true if CitrixAGBasic Auth", HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
4692 | { &hf_http_citrix_user,
4693 | { "Citrix AG Username", "http.authcitrix.user",
4694 | FT_STRING, BASE_NONE, NULL((void*)0), 0x0, NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
4695 | { &hf_http_citrix_domain,
4696 | { "Citrix AG Domain", "http.authcitrix.domain",
4697 | FT_STRING, BASE_NONE, NULL((void*)0), 0x0, NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
4698 | { &hf_http_citrix_passwd,
4699 | { "Citrix AG Password", "http.authcitrix.password",
4700 | FT_STRING, BASE_NONE, NULL((void*)0), 0x0, NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
4701 | { &hf_http_citrix_session,
4702 | { "Citrix AG Session ID", "http.authcitrix.session",
4703 | FT_STRING, BASE_NONE, NULL((void*)0), 0x0, NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
4704 | { &hf_http_response_line,
4705 | { "Response line", "http.response.line",
4706 | FT_STRING, BASE_NONE, NULL((void*)0), 0x0, NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
4707 | { &hf_http_request_line,
4708 | { "Request line", "http.request.line",
4709 | FT_STRING, BASE_NONE, NULL((void*)0), 0x0, NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
4710 | { &hf_http_request_method,
4711 | { "Request Method", "http.request.method",
4712 | FT_STRING, BASE_NONE, NULL((void*)0), 0x0,
4713 | "HTTP Request Method", HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
4714 | { &hf_http_request_uri,
4715 | { "Request URI", "http.request.uri",
4716 | FT_STRING, BASE_NONE, NULL((void*)0), 0x0,
4717 | "HTTP Request-URI", HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
4718 | { &hf_http_request_path,
4719 | { "Request URI Path", "http.request.uri.path",
4720 | FT_STRING, BASE_NONE, NULL((void*)0), 0x0,
4721 | "HTTP Request-URI Path", HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
4722 | { &hf_http_request_path_segment,
4723 | { "Request URI Path Segment", "http.request.uri.path.segment",
4724 | FT_STRING, BASE_NONE, NULL((void*)0), 0,
4725 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) } },
4726 | { &hf_http_request_query,
4727 | { "Request URI Query", "http.request.uri.query",
4728 | FT_STRING, BASE_NONE, NULL((void*)0), 0x0,
4729 | "HTTP Request-URI Query", HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
4730 | { &hf_http_request_query_parameter,
4731 | { "Request URI Query Parameter", "http.request.uri.query.parameter",
4732 | FT_STRING, BASE_NONE, NULL((void*)0), 0x0,
4733 | "HTTP Request-URI Query Parameter", HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
4734 | { &hf_http_request_version,
4735 | { "Request Version", "http.request.version",
4736 | FT_STRING, BASE_NONE, NULL((void*)0), 0x0,
4737 | "HTTP Request HTTP-Version", HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
4738 | { &hf_http_response_version,
4739 | { "Response Version", "http.response.version",
4740 | FT_STRING, BASE_NONE, NULL((void*)0), 0x0,
4741 | "HTTP Response HTTP-Version", HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
4742 | { &hf_http_request_full_uri,
4743 | { "Full request URI", "http.request.full_uri",
4744 | FT_STRING, BASE_NONE, NULL((void*)0), 0x0,
4745 | "The full requested URI (including host name)", HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
4746 | { &hf_http_response_code,
4747 | { "Status Code", "http.response.code",
4748 | FT_UINT24, BASE_DEC, NULL((void*)0), 0x0,
4749 | "HTTP Response Status Code", HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
4750 | { &hf_http_response_code_desc,
4751 | { "Status Code Description", "http.response.code.desc",
4752 | FT_STRING, BASE_NONE, NULL((void*)0), 0x0,
4753 | "HTTP Response Status Code Description", HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
4754 | { &hf_http_response_phrase,
4755 | { "Response Phrase", "http.response.phrase",
4756 | FT_STRING, BASE_NONE, NULL((void*)0), 0x0,
4757 | "HTTP Response Reason Phrase", HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
4758 | { &hf_http_authorization,
4759 | { "Authorization", "http.authorization",
4760 | FT_STRING, BASE_NONE, NULL((void*)0), 0x0,
4761 | "HTTP Authorization header", HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
4762 | { &hf_http_proxy_authenticate,
4763 | { "Proxy-Authenticate", "http.proxy_authenticate",
4764 | FT_STRING, BASE_NONE, NULL((void*)0), 0x0,
4765 | "HTTP Proxy-Authenticate header", HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
4766 | { &hf_http_proxy_authorization,
4767 | { "Proxy-Authorization", "http.proxy_authorization",
4768 | FT_STRING, BASE_NONE, NULL((void*)0), 0x0,
4769 | "HTTP Proxy-Authorization header", HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
4770 | { &hf_http_proxy_connect_host,
4771 | { "Proxy-Connect-Hostname", "http.proxy_connect_host",
4772 | FT_STRING, BASE_NONE, NULL((void*)0), 0x0,
4773 | "HTTP Proxy Connect Hostname", HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
4774 | { &hf_http_proxy_connect_port,
4775 | { "Proxy-Connect-Port", "http.proxy_connect_port",
4776 | FT_UINT16, BASE_DEC, NULL((void*)0), 0x0,
4777 | "HTTP Proxy Connect Port", HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
4778 | { &hf_http_www_authenticate,
4779 | { "WWW-Authenticate", "http.www_authenticate",
4780 | FT_STRING, BASE_NONE, NULL((void*)0), 0x0,
4781 | "HTTP WWW-Authenticate header", HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
4782 | { &hf_http_content_type,
4783 | { "Content-Type", "http.content_type",
4784 | FT_STRING, BASE_NONE, NULL((void*)0), 0x0,
4785 | "HTTP Content-Type header", HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
4786 | { &hf_http_content_length_header,
4787 | { "Content-Length", "http.content_length_header",
4788 | FT_STRING, BASE_NONE, NULL((void*)0), 0x0,
4789 | "HTTP Content-Length header", HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
4790 | { &hf_http_content_length,
4791 | { "Content length", "http.content_length",
4792 | FT_UINT64, BASE_DEC, NULL((void*)0), 0x0,
4793 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
4794 | { &hf_http_content_encoding,
4795 | { "Content-Encoding", "http.content_encoding",
4796 | FT_STRING, BASE_NONE, NULL((void*)0), 0x0,
4797 | "HTTP Content-Encoding header", HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
4798 | { &hf_http_transfer_encoding,
4799 | { "Transfer-Encoding", "http.transfer_encoding",
4800 | FT_STRING, BASE_NONE, NULL((void*)0), 0x0,
4801 | "HTTP Transfer-Encoding header", HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
4802 | { &hf_http_upgrade,
4803 | { "Upgrade", "http.upgrade",
4804 | FT_STRING, BASE_NONE, NULL((void*)0), 0x0,
4805 | "HTTP Upgrade header", HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
4806 | { &hf_http_user_agent,
4807 | { "User-Agent", "http.user_agent",
4808 | FT_STRING, BASE_NONE, NULL((void*)0), 0x0,
4809 | "HTTP User-Agent header", HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
4810 | { &hf_http_host,
4811 | { "Host", "http.host",
4812 | FT_STRING, BASE_NONE, NULL((void*)0), 0x0,
4813 | "HTTP Host", HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
4814 | { &hf_http_range,
4815 | { "Range", "http.range",
4816 | FT_STRING, BASE_NONE, NULL((void*)0), 0x0,
4817 | "HTTP Range", HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
4818 | { &hf_http_content_range,
4819 | { "Content-Range", "http.content_range",
4820 | FT_STRING, BASE_NONE, NULL((void*)0), 0x0,
4821 | "HTTP Content-Range", HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
4822 | { &hf_http_connection,
4823 | { "Connection", "http.connection",
4824 | FT_STRING, BASE_NONE, NULL((void*)0), 0x0,
4825 | "HTTP Connection", HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
4826 | { &hf_http_cookie,
4827 | { "Cookie", "http.cookie",
4828 | FT_STRING, BASE_NONE, NULL((void*)0), 0x0,
4829 | "HTTP Cookie", HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
4830 | { &hf_http_cookie_pair,
4831 | { "Cookie pair", "http.cookie_pair",
4832 | FT_STRING, BASE_NONE, NULL((void*)0), 0x0,
4833 | "A name/value HTTP cookie pair", HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
4834 | { &hf_http_accept,
4835 | { "Accept", "http.accept",
4836 | FT_STRING, BASE_NONE, NULL((void*)0), 0x0,
4837 | "HTTP Accept", HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
4838 | { &hf_http_referer,
4839 | { "Referer", "http.referer",
4840 | FT_STRING, BASE_NONE, NULL((void*)0), 0x0,
4841 | "HTTP Referer", HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
4842 | { &hf_http_accept_language,
4843 | { "Accept-Language", "http.accept_language",
4844 | FT_STRING, BASE_NONE, NULL((void*)0), 0x0,
4845 | "HTTP Accept Language", HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
4846 | { &hf_http_accept_encoding,
4847 | { "Accept Encoding", "http.accept_encoding",
4848 | FT_STRING, BASE_NONE, NULL((void*)0), 0x0,
4849 | "HTTP Accept Encoding", HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
4850 | { &hf_http_date,
4851 | { "Date", "http.date",
4852 | FT_STRING, BASE_NONE, NULL((void*)0), 0x0,
4853 | "HTTP Date", HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
4854 | { &hf_http_cache_control,
4855 | { "Cache-Control", "http.cache_control",
4856 | FT_STRING, BASE_NONE, NULL((void*)0), 0x0,
4857 | "HTTP Cache Control", HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
4858 | { &hf_http_server,
4859 | { "Server", "http.server",
4860 | FT_STRING, BASE_NONE, NULL((void*)0), 0x0,
4861 | "HTTP Server", HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
4862 | { &hf_http_location,
4863 | { "Location", "http.location",
4864 | FT_STRING, BASE_NONE, NULL((void*)0), 0x0,
4865 | "HTTP Location", HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
4866 | { &hf_http_sec_websocket_accept,
4867 | { "Sec-WebSocket-Accept", "http.sec_websocket_accept",
4868 | FT_STRING, BASE_NONE, NULL((void*)0), 0x0,
4869 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
4870 | { &hf_http_sec_websocket_extensions,
4871 | { "Sec-WebSocket-Extensions", "http.sec_websocket_extensions",
4872 | FT_STRING, BASE_NONE, NULL((void*)0), 0x0,
4873 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
4874 | { &hf_http_sec_websocket_key,
4875 | { "Sec-WebSocket-Key", "http.sec_websocket_key",
4876 | FT_STRING, BASE_NONE, NULL((void*)0), 0x0,
4877 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
4878 | { &hf_http_sec_websocket_protocol,
4879 | { "Sec-WebSocket-Protocol", "http.sec_websocket_protocol",
4880 | FT_STRING, BASE_NONE, NULL((void*)0), 0x0,
4881 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
4882 | { &hf_http_sec_websocket_version,
4883 | { "Sec-WebSocket-Version", "http.sec_websocket_version",
4884 | FT_STRING, BASE_NONE, NULL((void*)0), 0x0,
4885 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
4886 | { &hf_http_set_cookie,
4887 | { "Set-Cookie", "http.set_cookie",
4888 | FT_STRING, BASE_NONE, NULL((void*)0), 0x0,
4889 | "HTTP Set Cookie", HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
4890 | { &hf_http_last_modified,
4891 | { "Last-Modified", "http.last_modified",
4892 | FT_STRING, BASE_NONE, NULL((void*)0), 0x0,
4893 | "HTTP Last Modified", HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
4894 | { &hf_http_x_forwarded_for,
4895 | { "X-Forwarded-For", "http.x_forwarded_for",
4896 | FT_STRING, BASE_NONE, NULL((void*)0), 0x0,
4897 | "HTTP X-Forwarded-For", HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
4898 | { &hf_http_http2_settings,
4899 | { "HTTP2-Settings", "http.http2_settings",
4900 | FT_STRING, BASE_NONE, NULL((void*)0), 0x0,
4901 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
4902 | { &hf_http_request_in,
4903 | { "Request in frame", "http.request_in",
4904 | FT_FRAMENUM, BASE_NONE, FRAMENUM_TYPE(FT_FRAMENUM_REQUEST)((gpointer) (glong) (FT_FRAMENUM_REQUEST)), 0,
4905 | "This packet is a response to the packet with this number", HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
4906 | { &hf_http_response_in,
4907 | { "Response in frame", "http.response_in",
4908 | FT_FRAMENUM, BASE_NONE, FRAMENUM_TYPE(FT_FRAMENUM_RESPONSE)((gpointer) (glong) (FT_FRAMENUM_RESPONSE)), 0,
4909 | "This packet will be responded in the packet with this number", HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
4910 | { &hf_http_time,
4911 | { "Time since request", "http.time",
4912 | FT_RELATIVE_TIME, BASE_NONE, NULL((void*)0), 0,
4913 | "Time since the request was sent", HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
4914 | { &hf_http_chunked_trailer_part,
4915 | { "trailer-part", "http.chunked_trailer_part",
4916 | FT_STRING, BASE_NONE, NULL((void*)0), 0,
4917 | "Optional trailer in a chunked body", HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
4918 | { &hf_http_chunk_boundary,
4919 | { "Chunk boundary", "http.chunk_boundary",
4920 | FT_BYTES, BASE_NONE, NULL((void*)0), 0,
4921 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
4922 | { &hf_http_chunk_size,
4923 | { "Chunk size", "http.chunk_size",
4924 | FT_UINT32, BASE_DEC|BASE_UNIT_STRING0x00001000, UNS(&units_octet_octets)((0 ? (const struct unit_name_string*)0 : ((&units_octet_octets )))), 0,
4925 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
4926 | { &hf_http_chunk_data,
4927 | { "Chunk data", "http.chunk_data",
4928 | FT_BYTES, BASE_NONE, NULL((void*)0), 0,
4929 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
4930 | { &hf_http_file_data,
4931 | { "File Data", "http.file_data",
4932 | FT_BYTES, BASE_NONE, NULL((void*)0), 0,
4933 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
4934 | { &hf_http_unknown_header,
4935 | { "Unknown header", "http.unknown_header",
4936 | FT_STRING, BASE_NONE, NULL((void*)0), 0,
4937 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
4938 | { &hf_http_http2_settings_uri,
4939 | { "HTTP2 Settings URI", "http.http2_settings_uri",
4940 | FT_BYTES, BASE_NONE, NULL((void*)0), 0,
4941 | NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }},
4942 |
4943 | /* Body fragments */
4944 | REASSEMBLE_INIT_HF_ITEMS(http_body, "HTTP Chunked Body", "http.body"){ &hf_http_body_fragments, { "Reassembled " "HTTP Chunked Body" " fragments", "http.body" ".fragments", FT_NONE, BASE_NONE, ( (void*)0), 0x0, ((void*)0), -1, 0, HF_REF_TYPE_NONE, -1, ((void *)0) } }, { &hf_http_body_fragment, { "HTTP Chunked Body" " fragment", "http.body" ".fragment", FT_FRAMENUM, BASE_NONE , ((void*)0), 0x0, ((void*)0), -1, 0, HF_REF_TYPE_NONE, -1, ( (void*)0) } }, { &hf_http_body_fragment_overlap, { "HTTP Chunked Body" " fragment overlap", "http.body" ".fragment.overlap", FT_BOOLEAN , BASE_NONE, ((void*)0), 0x0, ((void*)0), -1, 0, HF_REF_TYPE_NONE , -1, ((void*)0) } }, { &hf_http_body_fragment_overlap_conflicts , { "HTTP Chunked Body" " fragment overlapping with conflicting data" , "http.body" ".fragment.overlap.conflicts", FT_BOOLEAN, BASE_NONE , ((void*)0), 0x0, ((void*)0), -1, 0, HF_REF_TYPE_NONE, -1, ( (void*)0) } }, { &hf_http_body_fragment_multiple_tails, { "HTTP Chunked Body" " has multiple tail fragments", "http.body" ".fragment.multiple_tails", FT_BOOLEAN, BASE_NONE, ((void*)0 ), 0x0, ((void*)0), -1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) } }, { &hf_http_body_fragment_too_long_fragment, { "HTTP Chunked Body" " fragment too long", "http.body" ".fragment.too_long_fragment" , FT_BOOLEAN, BASE_NONE, ((void*)0), 0x0, ((void*)0), -1, 0, HF_REF_TYPE_NONE , -1, ((void*)0) } }, { &hf_http_body_fragment_error, { "HTTP Chunked Body" " defragment error", "http.body" ".fragment.error", FT_FRAMENUM , BASE_NONE, ((void*)0), 0x0, ((void*)0), -1, 0, HF_REF_TYPE_NONE , -1, ((void*)0) } }, { &hf_http_body_fragment_count, { "HTTP Chunked Body" " fragment count", "http.body" ".fragment.count", FT_UINT32, BASE_DEC, ((void*)0), 0x0, ((void*)0), -1, 0, HF_REF_TYPE_NONE , -1, ((void*)0) } }, { &hf_http_body_reassembled_in, { "Reassembled in" , "http.body" ".reassembled.in", FT_FRAMENUM, BASE_NONE, ((void *)0), 0x0, ((void*)0), -1, 0, HF_REF_TYPE_NONE, -1, ((void*)0 ) } }, { &hf_http_body_reassembled_length, { "Reassembled length" , "http.body" ".reassembled.length", FT_UINT32, BASE_DEC, ((void *)0), 0x0, ((void*)0), -1, 0, HF_REF_TYPE_NONE, -1, ((void*)0 ) } }, { &hf_http_body_reassembled_data, { "Reassembled data" , "http.body" ".reassembled.data", FT_BYTES, BASE_NONE, ((void *)0), 0x0, ((void*)0), -1, 0, HF_REF_TYPE_NONE, -1, ((void*)0 ) } }, { &hf_http_body_segment, { "HTTP Chunked Body" " segment" , "http.body" ".segment", FT_BYTES, BASE_NONE, ((void*)0), 0x0 , ((void*)0), -1, 0, HF_REF_TYPE_NONE, -1, ((void*)0)} },
4945 | };
4946 | static int *ett[] = {
4947 | &ett_http,
4948 | &ett_http_ntlmssp,
4949 | &ett_http_kerberos,
4950 | &ett_http_request,
4951 | &ett_http_request_uri,
4952 | &ett_http_request_path,
4953 | &ett_http_request_query,
4954 | &ett_http_chunked_response,
4955 | &ett_http_chunk_data,
4956 | &ett_http_encoded_entity,
4957 | &ett_http_header_item,
4958 | &ett_http_http2_settings_item,
4959 | REASSEMBLE_INIT_ETT_ITEMS(http_body)&ett_http_body_fragment, &ett_http_body_fragments,
4960 | };
4961 |
4962 | static ei_register_info ei[] = {
4963 | { &ei_http_te_and_length, { "http.te_and_length", PI_MALFORMED0x07000000, PI_WARN0x00600000, "The Content-Length and Transfer-Encoding header must not be set together", EXPFILL0, ((void*)0), 0, ((void*)0), {0, {((void*)0), ((void*)0), FT_NONE , BASE_NONE, ((void*)0), 0, ((void*)0), -1, 0, HF_REF_TYPE_NONE , -1, ((void*)0)}} }},
4964 | { &ei_http_te_unknown, { "http.te_unknown", PI_UNDECODED0x05000000, PI_WARN0x00600000, "Unknown transfer coding name in Transfer-Encoding header", EXPFILL0, ((void*)0), 0, ((void*)0), {0, {((void*)0), ((void*)0), FT_NONE , BASE_NONE, ((void*)0), 0, ((void*)0), -1, 0, HF_REF_TYPE_NONE , -1, ((void*)0)}} }},
4965 | { &ei_http_subdissector_failed, { "http.subdissector_failed", PI_MALFORMED0x07000000, PI_NOTE0x00400000, "HTTP body subdissector failed, trying heuristic subdissector", EXPFILL0, ((void*)0), 0, ((void*)0), {0, {((void*)0), ((void*)0), FT_NONE , BASE_NONE, ((void*)0), 0, ((void*)0), -1, 0, HF_REF_TYPE_NONE , -1, ((void*)0)}} }},
4966 | { &ei_http_tls_port, { "http.tls_port", PI_SECURITY0x0a000000, PI_WARN0x00600000, "Unencrypted HTTP protocol detected over encrypted port, could indicate a dangerous misconfiguration.", EXPFILL0, ((void*)0), 0, ((void*)0), {0, {((void*)0), ((void*)0), FT_NONE , BASE_NONE, ((void*)0), 0, ((void*)0), -1, 0, HF_REF_TYPE_NONE , -1, ((void*)0)}} }},
4967 | { &ei_http_excess_data, { "http.excess_data", PI_PROTOCOL0x09000000, PI_WARN0x00600000, "Excess data after a body (not a new request/response), previous Content-Length bogus?", EXPFILL0, ((void*)0), 0, ((void*)0), {0, {((void*)0), ((void*)0), FT_NONE , BASE_NONE, ((void*)0), 0, ((void*)0), -1, 0, HF_REF_TYPE_NONE , -1, ((void*)0)}} }},
4968 | { &ei_http_leading_crlf, { "http.leading_crlf", PI_MALFORMED0x07000000, PI_ERROR0x00800000, "Leading CRLF previous message in the stream may have extra CRLF", EXPFILL0, ((void*)0), 0, ((void*)0), {0, {((void*)0), ((void*)0), FT_NONE , BASE_NONE, ((void*)0), 0, ((void*)0), -1, 0, HF_REF_TYPE_NONE , -1, ((void*)0)}} }},
4969 | { &ei_http_bad_header_name, { "http.bad_header_name", PI_PROTOCOL0x09000000, PI_WARN0x00600000, "Illegal characters found in header name", EXPFILL0, ((void*)0), 0, ((void*)0), {0, {((void*)0), ((void*)0), FT_NONE , BASE_NONE, ((void*)0), 0, ((void*)0), -1, 0, HF_REF_TYPE_NONE , -1, ((void*)0)}} }},
4970 | { &ei_http_decompression_failed, { "http.decompression_failed", PI_UNDECODED0x05000000, PI_WARN0x00600000, "Decompression failed", EXPFILL0, ((void*)0), 0, ((void*)0), {0, {((void*)0), ((void*)0), FT_NONE , BASE_NONE, ((void*)0), 0, ((void*)0), -1, 0, HF_REF_TYPE_NONE , -1, ((void*)0)}} }},
4971 | { &ei_http_decompression_disabled, { "http.decompression_disabled", PI_UNDECODED0x05000000, PI_CHAT0x00200000, "Decompression disabled", EXPFILL0, ((void*)0), 0, ((void*)0), {0, {((void*)0), ((void*)0), FT_NONE , BASE_NONE, ((void*)0), 0, ((void*)0), -1, 0, HF_REF_TYPE_NONE , -1, ((void*)0)}} }},
4972 | { &ei_http_response_code_invalid, { "http.response.code.invalid", PI_MALFORMED0x07000000, PI_WARN0x00600000, "Invalid HTTP response status code token", EXPFILL0, ((void*)0), 0, ((void*)0), {0, {((void*)0), ((void*)0), FT_NONE , BASE_NONE, ((void*)0), 0, ((void*)0), -1, 0, HF_REF_TYPE_NONE , -1, ((void*)0)}} }},
4973 | { &ei_http_request_uri_invalid, { "http.request.uri.invalid", PI_MALFORMED0x07000000, PI_ERROR0x00800000, "Invalid request target", EXPFILL0, ((void*)0), 0, ((void*)0), {0, {((void*)0), ((void*)0), FT_NONE , BASE_NONE, ((void*)0), 0, ((void*)0), -1, 0, HF_REF_TYPE_NONE , -1, ((void*)0)}} }},
4974 |
4975 | };
4976 |
4977 | /* UAT for header fields */
4978 | static uat_field_t custom_header_uat_fields[] = {
4979 | UAT_FLD_CSTRING(header_fields, header_name, "Header name", "HTTP header name"){"header_name", "Header name", PT_TXTMOD_STRING,{uat_fld_chk_str ,header_fields_header_name_set_cb,header_fields_header_name_tostr_cb },{0,0,0},0,"HTTP header name",((void*)0)},
4980 | UAT_FLD_CSTRING(header_fields, header_desc, "Field desc", "Description of the value contained in the header"){"header_desc", "Field desc", PT_TXTMOD_STRING,{uat_fld_chk_str ,header_fields_header_desc_set_cb,header_fields_header_desc_tostr_cb },{0,0,0},0,"Description of the value contained in the header" ,((void*)0)},
4981 | UAT_END_FIELDS{((void*)0),((void*)0),PT_TXTMOD_NONE,{0,0,0},{0,0,0},0,0,((void *)0)}
4982 | };
4983 |
4984 | module_t *http_module;
4985 | expert_module_t* expert_http;
4986 | uat_t* headers_uat;
4987 |
4988 | proto_http = proto_register_protocol("Hypertext Transfer Protocol", "HTTP", "http");
4989 | proto_ssdp = proto_register_protocol("Simple Service Discovery Protocol", "SSDP", "ssdp");
4990 |
4991 | proto_register_field_array(proto_http, hf, array_length(hf)(sizeof (hf) / sizeof (hf)[0]));
4992 | proto_register_subtree_array(ett, array_length(ett)(sizeof (ett) / sizeof (ett)[0]));
4993 | expert_http = expert_register_protocol(proto_http);
4994 | expert_register_field_array(expert_http, ei, array_length(ei)(sizeof (ei) / sizeof (ei)[0]));
4995 |
4996 | http_handle = register_dissector("http", dissect_http, proto_http);
4997 | http_tcp_handle = register_dissector("http-over-tcp", dissect_http_tcp, proto_http);
4998 | http_tls_handle = register_dissector("http-over-tls", dissect_http_tls, proto_http); /* RFC 2818 */
4999 | http_sctp_handle = register_dissector("http-over-sctp", dissect_http_sctp, proto_http);
5000 |
5001 | reassembly_table_register(&http_streaming_reassembly_table, &addresses_ports_reassembly_table_functions);
5002 |
5003 | http_module = prefs_register_protocol(proto_http, reinit_http);
5004 | prefs_register_bool_preference(http_module, "desegment_headers",
5005 | "Reassemble HTTP headers spanning multiple TCP segments",
5006 | "Whether the HTTP dissector should reassemble headers "
5007 | "of a request spanning multiple TCP segments. "
5008 | "To use this option, you must also enable "
5009 | "\"Allow subdissectors to reassemble TCP streams\" in the TCP protocol settings.",
5010 | &http_desegment_headers);
5011 | prefs_register_bool_preference(http_module, "desegment_body",
5012 | "Reassemble HTTP bodies spanning multiple TCP segments",
5013 | "Whether the HTTP dissector should use the "
5014 | "\"Content-length:\" value, if present, to reassemble "
5015 | "the body of a request spanning multiple TCP segments, "
5016 | "and reassemble chunked data spanning multiple TCP segments. "
5017 | "To use this option, you must also enable "
5018 | "\"Allow subdissectors to reassemble TCP streams\" in the TCP protocol settings.",
5019 | &http_desegment_body);
5020 | prefs_register_bool_preference(http_module, "dechunk_body",
5021 | "Reassemble chunked transfer-coded bodies",
5022 | "Whether to reassemble bodies of entities that are transferred "
5023 | "using the \"Transfer-Encoding: chunked\" method",
5024 | &http_dechunk_body);
5025 | prefs_register_bool_preference(http_module, "decompress_body",
5026 | "Uncompress entity bodies",
5027 | "Whether to uncompress entity bodies that are compressed "
5028 | "using \"Content-Encoding: \"",
5029 | &http_decompress_body);
5030 | prefs_register_bool_preference(http_module, "check_ascii_headers",
5031 | "Reject non-ASCII headers as invalid HTTP",
5032 | "Whether to treat non-ASCII in headers as non-HTTP data "
5033 | "and allow other dissectors to process it",
5034 | &http_check_ascii_headers);
5035 | prefs_register_bool_preference(http_module, "try_heuristic_first",
5036 | "Try heuristic sub-dissectors first",
5037 | "Try to decode HTTP bodies using heuristic sub-dissector "
5038 | "(aka MIME sniffing) before using a sub-dissector registered "
5039 | "to the Content-Type header or a specific port",
5040 | &http_try_heuristic_first);
5041 | prefs_register_obsolete_preference(http_module, "tcp_alternate_port");
5042 |
5043 | range_convert_str(wmem_epan_scope(), &global_http_tls_range, TLS_DEFAULT_RANGE"443", 65535);
5044 | prefs_register_range_preference(http_module, "tls.port", "SSL/TLS Ports",
5045 | "SSL/TLS Ports range",
5046 | &global_http_tls_range, 65535);
5047 | prefs_register_obsolete_preference(http_module, "ssl.port");
5048 | /* UAT */
5049 | headers_uat = uat_new("Custom HTTP Header Fields",
5050 | sizeof(header_field_t),
5051 | "custom_http_header_fields",
5052 | true1,
5053 | &header_fields,
5054 | &num_header_fields,
5055 | /* specifies named fields, so affects dissection
5056 | and the set of named fields */
5057 | UAT_AFFECTS_DISSECTION0x00000001|UAT_AFFECTS_FIELDS0x00000002,
5058 | NULL((void*)0),
5059 | header_fields_copy_cb,
5060 | header_fields_update_cb,
5061 | header_fields_free_cb,
5062 | header_fields_post_update_cb,
5063 | header_fields_reset_cb,
5064 | custom_header_uat_fields
5065 | );
5066 |
5067 | prefs_register_uat_preference(http_module, "custom_http_header_fields", "Custom HTTP header fields",
5068 | "A table to define custom HTTP header for which fields can be setup and used for filtering/data extraction etc.",
5069 | headers_uat);
5070 |
5071 | /*
5072 | * Dissectors shouldn't register themselves in this table;
5073 | * instead, they should call "http_tcp_dissector_add()", and
5074 | * we'll register the port number they specify as a port
5075 | * for HTTP, and register them in our subdissector table.
5076 | *
5077 | * This only works for protocols such as IPP that run over
5078 | * HTTP on a specific non-HTTP port.
5079 | */
5080 | port_subdissector_table = register_dissector_table("http.port",
5081 | "TCP port for protocols using HTTP", proto_http, FT_UINT16, BASE_DEC);
5082 |
5083 | /*
5084 | * Maps the Upgrade header value.
5085 | * https://datatracker.ietf.org/doc/html/rfc9110#section-16.7
5086 | * "A protocol-name token is case-insensitive and registered with the
5087 | * preferred case to be generated by senders."
5088 | */
5089 | upgrade_subdissector_table = register_dissector_table("http.upgrade", "HTTP Upgrade", proto_http, FT_STRING, STRING_CASE_INSENSITIVE1);
5090 |
5091 | /*
5092 | * Heuristic dissectors SHOULD register themselves in
5093 | * this table using the standard heur_dissector_add()
5094 | * function.
5095 | */
5096 | heur_subdissector_list = register_heur_dissector_list_with_description("http", "HTTP payload fallback", proto_http);
5097 |
5098 | /*
5099 | * Register for tapping
5100 | */
5101 | http_tap = register_tap("http"); /* HTTP statistics tap */
5102 | http_follow_tap = register_tap("http_follow"); /* HTTP Follow tap */
5103 | credentials_tap = register_tap("credentials"); /* credentials tap */
5104 |
5105 | register_follow_stream(proto_http, "http_follow", tcp_follow_conv_filter, tcp_follow_index_filter, tcp_follow_address_filter,
5106 | tcp_port_to_display, follow_tvb_tap_listener,
5107 | get_tcp_stream_count, NULL((void*)0));
5108 | http_eo_tap = register_export_object(proto_http, http_eo_packet, NULL((void*)0));
5109 |
5110 | /* compile patterns, excluding "/" */
5111 | ws_mempbrk_compile(&pbrk_gen_delims, ":?#[]@");
5112 | /* exclude "=", separating key and value should be done separately */
5113 | ws_mempbrk_compile(&pbrk_sub_delims, "!$&'()*+,;");
5114 |
5115 | register_external_value_string("vals_http_status_code", vals_http_status_code);
5116 | }
5117 |
5118 | /*
5119 | * Called by dissectors for protocols that run atop HTTP/TCP.
5120 | */
5121 | void
5122 | http_tcp_dissector_add(uint32_t port, dissector_handle_t handle)
5123 | {
5124 | /*
5125 | * Register ourselves as the handler for that port number
5126 | * over TCP. "Auto-preference" not needed
5127 | */
5128 | dissector_add_uint("tcp.port", port, http_tcp_handle);
5129 |
5130 | /*
5131 | * And register them in *our* table for that port.
5132 | */
5133 | dissector_add_uint("http.port", port, handle);
5134 | }
5135 |
5136 | WS_DLL_PUBLIC__attribute__ ((visibility ("default"))) extern
5137 | void http_tcp_dissector_delete(uint32_t port)
5138 | {
5139 | /*
5140 | * Unregister ourselves as the handler for that port number
5141 | * over TCP. "Auto-preference" not needed
5142 | */
5143 | dissector_delete_uint("tcp.port", port, NULL((void*)0));
5144 |
5145 | /*
5146 | * And unregister them in *our* table for that port.
5147 | */
5148 | dissector_delete_uint("http.port", port, NULL((void*)0));
5149 | }
5150 |
5151 | void
5152 | http_tcp_port_add(uint32_t port)
5153 | {
5154 | /*
5155 | * Register ourselves as the handler for that port number
5156 | * over TCP. We rely on our caller having registered
5157 | * themselves for the appropriate media type.
5158 | * No "auto-preference" used.
5159 | */
5160 | dissector_add_uint("tcp.port", port, http_tcp_handle);
5161 | }
5162 |
5163 | void
5164 | proto_reg_handoff_http(void)
5165 | {
5166 | dissector_handle_t ssdp_handle;
5167 |
5168 | media_handle = find_dissector_add_dependency("media", proto_http);
5169 | http2_handle = find_dissector("http2");
5170 | /*
5171 | * XXX - is there anything to dissect in the body of an SSDP
5172 | * request or reply? I.e., should there be an SSDP dissector?
5173 | */
5174 | ssdp_handle = create_dissector_handle(dissect_ssdp, proto_ssdp);
5175 | dissector_add_uint_with_preference("udp.port", UDP_PORT_SSDP1900, ssdp_handle);
5176 |
5177 | /*
5178 | * TLS Application-Layer Protocol Negotiation (ALPN) protocol ID.
5179 | */
5180 | dissector_add_string("tls.alpn", "http/1.1", http_tls_handle);
5181 |
5182 | ntlmssp_handle = find_dissector_add_dependency("ntlmssp", proto_http);
5183 | gssapi_handle = find_dissector_add_dependency("gssapi", proto_http);
5184 | sstp_handle = find_dissector_add_dependency("sstp", proto_http);
5185 |
5186 | stats_tree_cfg *st_config;
5187 | st_config = stats_tree_register("http", "http", "HTTP" STATS_TREE_MENU_SEPARATOR"//" "Packet Counter", 0, http_stats_tree_packet, http_stats_tree_init, NULL((void*)0) );
5188 | stats_tree_set_first_column_name(st_config, "Packet Type");
5189 | st_config = stats_tree_register("http", "http_req", "HTTP" STATS_TREE_MENU_SEPARATOR"//" "Requests", 0, http_req_stats_tree_packet, http_req_stats_tree_init, NULL((void*)0) );
5190 | stats_tree_set_first_column_name(st_config, "Request Type");
5191 | st_config = stats_tree_register("http", "http_srv", "HTTP" STATS_TREE_MENU_SEPARATOR"//" "Load Distribution",0, http_reqs_stats_tree_packet, http_reqs_stats_tree_init, NULL((void*)0) );
5192 | stats_tree_set_first_column_name(st_config, "Packet Type");
5193 | st_config = stats_tree_register("http", "http_seq", "HTTP" STATS_TREE_MENU_SEPARATOR"//" "Request Sequences",0, http_seq_stats_tree_packet, http_seq_stats_tree_init, NULL((void*)0) );
5194 | stats_tree_set_first_column_name(st_config, "Sequence Type");
5195 |
5196 | dissector_add_uint("acdr.tls_application_port", 443, http_handle);
5197 | dissector_add_uint("acdr.tls_application", TLS_APP_HTTP, http_handle);
5198 | dissector_add_uint("acdr.tls_application", TLS_APP_TR069, http_handle);
5199 | dissector_add_uint("ippusb", 0, http_tcp_handle);
5200 | }
5201 |
5202 | /*
5203 | * Content-Type: message/http
5204 | */
5205 |
5206 | static int proto_message_http;
5207 | static int ett_message_http;
5208 |
5209 | static int
5210 | dissect_message_http(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, void* data _U___attribute__((unused)))
5211 | {
5212 | proto_tree *subtree;
5213 | proto_item *ti;
5214 | unsigned offset = 0, next_offset;
5215 | unsigned len;
5216 | bool_Bool len_found;
5217 |
5218 | col_append_str(pinfo->cinfo, COL_INFO, " (message/http)");
5219 | if (tree) {
5220 | ti = proto_tree_add_item(tree, proto_message_http,
5221 | tvb, 0, -1, ENC_NA0x00000000);
5222 | subtree = proto_item_add_subtree(ti, ett_message_http);
5223 | while (tvb_offset_exists(tvb, offset)) {
5224 | len_found = tvb_find_line_end_length(tvb, offset,
5225 | tvb_ensure_captured_length_remaining(tvb, offset),
5226 | &len, &next_offset);
5227 | if (len_found == false0)
5228 | break;
5229 | proto_tree_add_format_text(subtree, tvb, offset, len);
5230 | offset = next_offset;
5231 | }
5232 | }
5233 | return tvb_captured_length(tvb);
5234 | }
5235 |
5236 | void
5237 | proto_register_message_http(void)
5238 | {
5239 | static int *ett[] = {
5240 | &ett_message_http,
5241 | };
5242 |
5243 | proto_message_http = proto_register_protocol("Media Type: message/http", "message/http", "message-http");
5244 | proto_register_subtree_array(ett, array_length(ett)(sizeof (ett) / sizeof (ett)[0]));
5245 | }
5246 |
5247 | void
5248 | proto_reg_handoff_message_http(void)
5249 | {
5250 | dissector_handle_t message_http_handle;
5251 |
5252 | message_http_handle = create_dissector_handle(dissect_message_http,
5253 | proto_message_http);
5254 |
5255 | dissector_add_string("media_type", "message/http", message_http_handle);
5256 |
5257 | heur_dissector_add("tcp", dissect_http_heur_tcp, "HTTP over TCP", "http_tcp", proto_http, HEURISTIC_ENABLE);
5258 | heur_dissector_add("tls", dissect_http_heur_tls, "HTTP over TLS", "http_tls", proto_http, HEURISTIC_ENABLE);
5259 |
5260 | proto_http2 = proto_get_id_by_filter_name("http2");
5261 |
5262 | dissector_add_uint_range_with_preference("tcp.port", TCP_DEFAULT_RANGE"80,3128,3132,5985,8080,8088,11371,1900,2869,2710", http_tcp_handle);
5263 | dissector_add_uint_range_with_preference("sctp.port", SCTP_DEFAULT_RANGE"80", http_sctp_handle);
5264 |
5265 | /*
5266 | * Get the content type and Internet media type table
5267 | */
5268 | media_type_subdissector_table = find_dissector_table("media_type");
5269 |
5270 | streaming_content_type_dissector_table = find_dissector_table("streaming_content_type");
5271 |
5272 | reinit_http();
5273 | }
5274 |
5275 | /*
5276 | * Editor modelines - https://www.wireshark.org/tools/modelines.html
5277 | *
5278 | * Local variables:
5279 | * c-basic-offset: 8
5280 | * tab-width: 8
5281 | * indent-tabs-mode: t
5282 | * End:
5283 | *
5284 | * vi: set shiftwidth=8 tabstop=8 noexpandtab:
5285 | * :indentSize=8:tabSize=8:noTabs=false:
5286 | */