### Bug Summary

File: | builds/wireshark/wireshark/epan/addr_resolv.c
Warning: | line 4026, column 46 An undefined value may be read from 'errno'

### Annotated Source Code

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1 | /* addr_resolv.c
2 | * Routines for network object lookup
3 | *
4 | * Laurent Deniel <laurent.deniel@free.fr>
5 | *
6 | * Add option to resolv VLAN ID to describing name
7 | * Uli Heilmeier, March 2016
8 | *
9 | * Wireshark - Network traffic analyzer
10 | * By Gerald Combs <gerald@wireshark.org>
11 | * Copyright 1998 Gerald Combs
12 | *
13 | * SPDX-License-Identifier: GPL-2.0-or-later
14 | */
15 |
16 | #include "config.h"
17 |
18 | #include <stdio.h>
19 | #include <stdlib.h>
20 | #include <string.h>
21 | #include <errno(*__errno_location ()).h>
22 |
23 | #include <wsutil/strtoi.h>
24 | #include <wsutil/ws_assert.h>
25 |
26 | #include "iana-info.h"
27 | #include "manuf.h"
28 |
29 | /*
30 | * Win32 doesn't have SIGALRM (and it's the OS where name lookup calls
31 | * are most likely to take a long time, given the way address-to-name
32 | * lookups are done over NBNS).
33 | *
34 | * macOS does have SIGALRM, but if you longjmp() out of a name resolution
35 | * call in a signal handler, you might crash, because the state of the
36 | * resolution code that sends messages to lookupd might be inconsistent
37 | * if you jump out of it in middle of a call.
38 | *
39 | * There's no guarantee that longjmp()ing out of name resolution calls
40 | * will work on *any* platform; OpenBSD got rid of the alarm/longjmp
41 | * code in tcpdump, to avoid those sorts of problems, and that was
42 | * picked up by tcpdump.org tcpdump.
43 | *
44 | * So, for now, we do not use alarm() and SIGALRM to time out host name
45 | * lookups. If we get a lot of complaints about lookups taking a long time,
46 | * we can reconsider that decision. (Note that tcpdump originally added
47 | * such a timeout mechanism that for the benefit of systems using NIS to
48 | * look up host names; that might now be fixed in NIS implementations, for
49 | * those sites still using NIS rather than DNS for that.... tcpdump no
50 | * longer does that, for the same reasons that we don't.)
51 | *
52 | * If we're using an asynchronous DNS resolver, that shouldn't be an issue.
53 | * If we're using a synchronous name lookup mechanism (which we'd do mainly
54 | * to support resolving addresses and host names using more mechanisms than
55 | * just DNS, such as NIS, NBNS, or Mr. Hosts File), we could do that in
56 | * a separate thread, making it, in effect, asynchronous.
57 | */
58 |
59 | #ifdef HAVE_NETINET_IN_H1
60 | # include <netinet/in.h>
61 | #endif
62 |
63 | #ifdef HAVE_NETDB_H1
64 | #include <netdb.h>
65 | #endif
66 |
67 | #ifdef HAVE_SYS_SOCKET_H1
68 | #include <sys/socket.h> /* needed to define AF_ values on UNIX */
69 | #endif
70 |
71 | #ifdef _WIN32
72 | #include <winsock2.h> /* needed to define AF_ values on Windows */
73 | #include <ws2tcpip.h>
74 | #endif
75 |
76 | #ifdef _WIN32
77 | # define socklen_t unsigned int
78 | #endif
79 | #include <ares.h>
80 | #include <ares_version.h>
81 |
82 | #include <glib.h>
83 |
84 | #include <epan/packet.h>
85 | #include "addr_resolv.h"
86 | #include "wsutil/filesystem.h"
87 |
88 | #include <wsutil/report_message.h>
89 | #include <wsutil/file_util.h>
90 | #include <wsutil/pint.h>
91 | #include <wsutil/inet_cidr.h>
92 |
93 | #include <epan/strutil.h>
94 | #include <epan/to_str.h>
95 | #include <epan/maxmind_db.h>
96 | #include <epan/prefs.h>
97 | #include <epan/uat.h>
98 |
99 | #define ENAME_HOSTS"hosts" "hosts"
100 | #define ENAME_SUBNETS"subnets" "subnets"
101 | #define ENAME_SUBNETS_V6"subnetsipv6" "subnetsipv6"
102 | #define ENAME_ETHERS"ethers" "ethers"
103 | #define ENAME_IPXNETS"ipxnets" "ipxnets"
104 | #define ENAME_MANUF"manuf" "manuf"
105 | #define ENAME_WKA"wka" "wka"
106 | #define ENAME_SERVICES"services" "services"
107 | #define ENAME_VLANS"vlans" "vlans"
108 | #define ENAME_SS7PCS"ss7pcs" "ss7pcs"
109 | #define ENAME_ENTERPRISES"enterprises" "enterprises"
110 | #define ENAME_TACS"tacs" "tacs"
111 |
112 | #define HASHETHSIZE2048 2048
113 | #define HASHHOSTSIZE2048 2048
114 | #define HASHIPXNETSIZE256 256
115 | #define SUBNETLENGTHSIZE32 32 /*1-32 inc.*/
116 | #define SUBNETLENGTHSIZE_V6128 128 /*1-128 inc.*/
117 |
118 | /* hash table used for IPv4 lookup */
119 |
120 | #define HASH_IPV4_ADDRESS(addr)((((((guint32) ( (((guint32) (addr) & (guint32) 0x000000ffU ) << 24) | (((guint32) (addr) & (guint32) 0x0000ff00U ) << 8) | (((guint32) (addr) & (guint32) 0x00ff0000U ) >> 8) | (((guint32) (addr) & (guint32) 0xff000000U ) >> 24)))))) & (2048 - 1)) (g_htonl(addr)(((((guint32) ( (((guint32) (addr) & (guint32) 0x000000ffU ) << 24) | (((guint32) (addr) & (guint32) 0x0000ff00U ) << 8) | (((guint32) (addr) & (guint32) 0x00ff0000U ) >> 8) | (((guint32) (addr) & (guint32) 0xff000000U ) >> 24)))))) & (HASHHOSTSIZE2048 - 1))
121 |
122 |
123 | typedef struct sub_net_hashipv4 {
124 | unsigned addr;
125 | /* XXX: No longer needed?*/
126 | uint8_t flags; /* B0 dummy_entry, B1 resolve, B2 If the address is used in the trace */
127 | struct sub_net_hashipv4 *next;
128 | char name[MAXNAMELEN64];
129 | } sub_net_hashipv4_t;
130 |
131 | /* Array of entries of subnets of different lengths */
132 | typedef struct {
133 | size_t mask_length; /*1-32*/
134 | uint32_t mask; /* e.g. 255.255.255.*/
135 | sub_net_hashipv4_t** subnet_addresses; /* Hash table of subnet addresses */
136 | } subnet_length_entry_t;
137 |
138 |
139 | /* IPv6 subnet lookup structures */
140 | typedef struct sub_net_hashipv6 {
141 | uint8_t addr[16]; /* masked network address */
142 | uint8_t flags;
143 | struct sub_net_hashipv6 *next;
144 | char name[MAXNAMELEN64];
145 | } sub_net_hashipv6_t;
146 |
147 | typedef struct {
148 | size_t mask_length; /* 1-128 */
149 | uint8_t mask[16]; /* byte mask */
150 | sub_net_hashipv6_t **subnet_addresses; /* hash table */
151 | } subnet_length_entry_v6_t;
152 |
153 | typedef struct {
154 | uint8_t mask[16];
155 | size_t mask_length;
156 | const char *name;
157 | } subnet_entry_v6_t;
158 |
159 | /* hash table used for IPX network lookup */
160 |
161 | /* XXX - check goodness of hash function */
162 |
163 | #define HASH_IPX_NET(net)((net) & (256 - 1)) ((net) & (HASHIPXNETSIZE256 - 1))
164 |
165 | typedef struct hashipxnet {
166 | unsigned addr;
167 | struct hashipxnet *next;
168 | char name[MAXNAMELEN64];
169 | } hashipxnet_t;
170 |
171 | typedef struct hashvlan {
172 | unsigned id;
173 | /* struct hashvlan *next; */
174 | char name[MAXVLANNAMELEN128];
175 | } hashvlan_t;
176 |
177 | typedef struct ss7pc {
178 | uint32_t id; /* 1st byte NI, 3 following bytes: Point Code */
179 | char pc_addr[MAXNAMELEN64];
180 | char name[MAXNAMELEN64];
181 | } hashss7pc_t;
182 |
183 | /* hash tables used for ethernet and manufacturer lookup */
184 | struct hashether {
185 | uint8_t flags; /* (See above) */
186 | uint8_t addr[6];
187 | char hexaddr[6*3];
188 | char resolved_name[MAXNAMELEN64];
189 | };
190 |
191 | struct hasheui64 {
192 | uint8_t flags; /* (See above) */
193 | uint8_t addr[EUI64_ADDR_LEN8];
194 | char hexaddr[EUI64_ADDR_LEN8*3];
195 | char resolved_name[MAXNAMELEN64];
196 | };
197 |
198 | struct hashwka {
199 | uint8_t flags; /* (See above) */
200 | char* name;
201 | };
202 |
203 | struct hashmanuf {
204 | uint8_t flags; /* (See above) */
205 | uint8_t addr[3];
206 | char hexaddr[3*3];
207 | char resolved_name[MAXNAMELEN64];
208 | char resolved_longname[MAXNAMELEN64];
209 | };
210 |
211 | /* internal type used when reading ethers file (or wka, manuf) */
212 | typedef struct _ether
213 | {
214 | uint8_t addr[8];
215 | char name[MAXNAMELEN64];
216 | char longname[MAXNAMELEN64];
217 | } ether_t;
218 |
219 | /* internal ipxnet type */
220 | typedef struct _ipxnet
221 | {
222 | unsigned addr;
223 | char name[MAXNAMELEN64];
224 | } ipxnet_t;
225 |
226 | /* internal vlan type */
227 | typedef struct _vlan
228 | {
229 | unsigned id;
230 | char name[MAXVLANNAMELEN128];
231 | } vlan_t;
232 |
233 | static wmem_allocator_t *addr_resolv_scope;
234 |
235 | // Maps unsigned -> hashipxnet_t*
236 | static wmem_map_t *ipxnet_hash_table;
237 | static wmem_map_t *ipv4_hash_table;
238 | static wmem_map_t *ipv6_hash_table;
239 | // Maps unsigned -> hashvlan_t*
240 | static wmem_map_t *vlan_hash_table;
241 | static wmem_map_t *ss7pc_hash_table;
242 | static wmem_map_t *tac_hash_table;
243 |
244 | // Maps IP address -> manually set hostname.
245 | static wmem_map_t *manually_resolved_ipv4_list;
246 | static wmem_map_t *manually_resolved_ipv6_list;
247 |
248 | static addrinfo_lists_t addrinfo_lists;
249 |
250 | struct cb_serv_data {
251 | char *service;
252 | port_type proto;
253 | };
254 |
255 | // Maps unsigned -> hashmanuf_t*
256 | // XXX: Note that hashmanuf_t* only accommodates 24-bit OUIs.
257 | // We might want to store vendor names from MA-M and MA-S to
258 | // present in the Resolved Addresses dialog.
259 | static wmem_map_t *manuf_hashtable;
260 | // Maps address -> hashwka_t*
261 | static wmem_map_t *wka_hashtable;
262 | // Maps address -> hashether_t*
263 | static wmem_map_t *eth_hashtable;
264 | // Maps address -> hasheui64_t*
265 | static wmem_map_t *eui64_hashtable;
266 | // Maps unsigned -> serv_port_t*
267 | static wmem_map_t *serv_port_hashtable;
268 | static wmem_map_t *serv_port_custom_hashtable;
269 |
270 | // Maps enterprise-id -> enterprise-desc (only used for user additions)
271 | static GHashTable *enterprises_hashtable;
272 |
273 | static subnet_length_entry_t subnet_length_entries[SUBNETLENGTHSIZE32]; /* Ordered array of entries */
274 | static bool_Bool have_subnet_entry;
275 |
276 | static subnet_length_entry_v6_t subnet_length_entries_v6[SUBNETLENGTHSIZE_V6128]; /* IPv6 subnet entries */
277 | static bool_Bool have_subnet_entry_v6;
278 |
279 | static bool_Bool new_resolved_objects;
280 |
281 | static GPtrArray* extra_hosts_files;
282 |
283 | static hashether_t *add_eth_name(const uint8_t *addr, const char *name, bool_Bool static_entry);
284 | static hasheui64_t *add_eui64_name(const uint8_t *addr, const char *name, bool_Bool static_entry);
285 | static void add_serv_port_cb(const uint32_t port, void *ptr);
286 |
287 | /* http://eternallyconfuzzled.com/tuts/algorithms/jsw_tut_hashing.aspx#existing
288 | * One-at-a-Time hash
289 | */
290 | unsigned
291 | ipv6_oat_hash(const void *key)
292 | {
293 | int len = 16;
294 | const unsigned char *p = (const unsigned char *)key;
295 | unsigned h = 0;
296 | int i;
297 |
298 | for ( i = 0; i < len; i++ ) {
299 | h += p[i];
300 | h += ( h << 10 );
301 | h ^= ( h >> 6 );
302 | }
303 |
304 | h += ( h << 3 );
305 | h ^= ( h >> 11 );
306 | h += ( h << 15 );
307 |
308 | return h;
309 | }
310 |
311 | unsigned
312 | ws_ipv6_hash(const void* key)
313 | {
314 | #ifdef HAVE_XXHASH1
315 | return wmem_strong_hash(key, 16);
316 | #else
317 | return ipv6_oat_hash(key);
318 | #endif
319 | }
320 |
321 | gboolean
322 | ipv6_equal(const void *v1, const void *v2)
323 | {
324 |
325 | if (memcmp(v1, v2, sizeof (ws_in6_addr)) == 0) {
326 | return true1;
327 | }
328 |
329 | return false0;
330 | }
331 |
332 | /*
333 | * Flag controlling what names to resolve.
334 | */
335 | e_addr_resolve gbl_resolv_flags = {
336 | true1, /* mac_name */
337 | false0, /* network_name */
338 | false0, /* transport_name */
339 | true1, /* dns_pkt_addr_resolution */
340 | false0, /* handshake_sni_addr_resolution */
341 | true1, /* use_external_net_name_resolver */
342 | false0, /* vlan_name */
343 | false0, /* ss7 point code names */
344 | true1, /* maxmind_geoip */
345 | false0, /* tac_name */
346 | };
347 |
348 | /* XXX - ares_init_options(3) says:
349 | * "The recommended concurrent query limit is about 32k queries"
350 | */
351 | static unsigned name_resolve_concurrency = 500;
352 | static bool_Bool resolve_synchronously;
353 |
354 | /*
355 | * Global variables (can be changed in GUI sections)
356 | * XXX - they could be changed in GUI code, but there's currently no
357 | * GUI code to change them.
358 | */
359 |
360 | static char *g_ethers_path; /* global ethers file */
361 | static char *g_pethers_path; /* personal ethers file */
362 | static char *g_wka_path; /* global well-known-addresses file */
363 | static char *g_manuf_path; /* global manuf file */
364 | static char *g_pmanuf_path; /* personal manuf file */
365 | static char *g_ipxnets_path; /* global ipxnets file */
366 | static char *g_pipxnets_path; /* personal ipxnets file */
367 | static char *g_services_path; /* global services file */
368 | static char *g_pservices_path; /* personal services file */
369 | static char *g_pvlan_path; /* personal vlans file */
370 | static char *g_enterprises_path; /* global enterprises file */
371 | static char *g_penterprises_path; /* personal enterprises file */
372 | /* first resolving call */
373 |
374 | /*
375 | * Submitted asynchronous queries trigger a callback (c_ares_ghba_cb()).
376 | * Queries are added to c_ares_queue_head. During processing, queries are
377 | * popped off the front of c_ares_queue_head and submitted using
378 | * ares_gethostbyaddr().
379 | * The callback processes the response, then frees the request.
380 | */
381 | typedef struct _async_dns_queue_msg
382 | {
383 | union {
384 | uint32_t ip4;
385 | ws_in6_addr ip6;
386 | } addr;
387 | int family;
388 | } async_dns_queue_msg_t;
389 |
390 | typedef struct _async_hostent {
391 | int addr_size;
392 | int copied;
393 | void *addrp;
394 | } async_hostent_t;
395 |
396 | static void
397 | c_ares_ghba_cb(void *arg, int status, int timeouts _U___attribute__((unused)), struct hostent *he);
398 |
399 | /*
400 | * Submitted synchronous queries trigger a callback (c_ares_ghba_sync_cb()).
401 | * The callback processes the response, sets completed to true if
402 | * completed is non-NULL, then frees the request.
403 | */
404 | typedef struct _sync_dns_data
405 | {
406 | union {
407 | uint32_t ip4;
408 | ws_in6_addr ip6;
409 | } addr;
410 | int family;
411 | bool_Bool *completed;
412 | } sync_dns_data_t;
413 |
414 | static ares_channel ghba_chan; /* ares_gethostbyaddr -- Usually non-interactive, no timeout */
415 | static ares_channel ghbn_chan; /* ares_gethostbyname -- Usually interactive, timeout */
416 |
417 | static bool_Bool async_dns_initialized;
418 | static unsigned async_dns_in_flight;
419 | static wmem_list_t *async_dns_queue_head;
420 | static GMutex async_dns_queue_mtx;
421 |
422 | //UAT for providing a list of DNS servers to C-ARES for name resolution
423 | static bool_Bool use_custom_dns_server_list;
424 | struct dns_server_data {
425 | char *ipaddr;
426 | uint32_t udp_port;
427 | uint32_t tcp_port;
428 | };
429 |
430 | UAT_CSTRING_CB_DEF(dnsserverlist_uats, ipaddr, struct dns_server_data)static void dnsserverlist_uats_ipaddr_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((((struct dns_server_data*)rec)-> ipaddr)); (((struct dns_server_data*)rec)->ipaddr) = new_buf ; } static void dnsserverlist_uats_ipaddr_tostr_cb(void* rec, char** out_ptr, unsigned* out_len, const void* u1 __attribute__ ((unused)), const void* u2 __attribute__((unused))) { if (((struct dns_server_data*)rec)->ipaddr ) { *out_ptr = g_strdup_inline ((((struct dns_server_data*)rec)->ipaddr)); *out_len = (unsigned )strlen((((struct dns_server_data*)rec)->ipaddr)); } else { *out_ptr = g_strdup_inline (""); *out_len = 0; } }
431 | UAT_DEC_CB_DEF(dnsserverlist_uats, tcp_port, struct dns_server_data)static void dnsserverlist_uats_tcp_port_set_cb(void* rec, const char* buf, unsigned len, const void* u1 __attribute__((unused )), const void* u2 __attribute__((unused))) { char* tmp_str = g_strndup(buf,len); ws_strtou32(tmp_str, ((void*)0), &(( struct dns_server_data*)rec)->tcp_port); g_free(tmp_str); } static void dnsserverlist_uats_tcp_port_tostr_cb(void* rec, char ** out_ptr, unsigned* out_len, const void* u1 __attribute__(( unused)), const void* u2 __attribute__((unused))) { *out_ptr = wmem_strdup_printf(((void*)0), "%u",((struct dns_server_data *)rec)->tcp_port); *out_len = (unsigned)strlen(*out_ptr); }
432 | UAT_DEC_CB_DEF(dnsserverlist_uats, udp_port, struct dns_server_data)static void dnsserverlist_uats_udp_port_set_cb(void* rec, const char* buf, unsigned len, const void* u1 __attribute__((unused )), const void* u2 __attribute__((unused))) { char* tmp_str = g_strndup(buf,len); ws_strtou32(tmp_str, ((void*)0), &(( struct dns_server_data*)rec)->udp_port); g_free(tmp_str); } static void dnsserverlist_uats_udp_port_tostr_cb(void* rec, char ** out_ptr, unsigned* out_len, const void* u1 __attribute__(( unused)), const void* u2 __attribute__((unused))) { *out_ptr = wmem_strdup_printf(((void*)0), "%u",((struct dns_server_data *)rec)->udp_port); *out_len = (unsigned)strlen(*out_ptr); }
433 |
434 | static uat_t *dnsserver_uat;
435 | static struct dns_server_data *dnsserverlist_uats;
436 | static unsigned ndnsservers;
437 |
438 | static void
439 | dns_server_free_cb(void *data)
440 | {
441 | struct dns_server_data *h = (struct dns_server_data*)data;
442 |
443 | g_free(h->ipaddr);
444 | }
445 |
446 | static void*
447 | dns_server_copy_cb(void *dst_, const void *src_, size_t len _U___attribute__((unused)))
448 | {
449 | const struct dns_server_data *src = (const struct dns_server_data *)src_;
450 | struct dns_server_data *dst = (struct dns_server_data *)dst_;
451 |
452 | dst->ipaddr = g_strdup(src->ipaddr)g_strdup_inline (src->ipaddr);
453 | dst->udp_port = src->udp_port;
454 | dst->tcp_port = src->tcp_port;
455 |
456 | return dst;
457 | }
458 |
459 | static bool_Bool
460 | dnsserver_uat_fld_ip_chk_cb(void* r _U___attribute__((unused)), const char* ipaddr, unsigned len _U___attribute__((unused)), const void* u1 _U___attribute__((unused)), const void* u2 _U___attribute__((unused)), char** err)
461 | {
462 | //Check for a valid IPv4 or IPv6 address.
463 | if (ipaddr && g_hostname_is_ip_address(ipaddr)) {
464 | *err = NULL((void*)0);
465 | return true1;
466 | }
467 |
468 | *err = ws_strdup_printf("No valid IP address given.")wmem_strdup_printf(((void*)0), "No valid IP address given.");
469 | return false0;
470 | }
471 |
472 | static bool_Bool
473 | dnsserver_uat_fld_port_chk_cb(void* r _U___attribute__((unused)), const char* p, unsigned len _U___attribute__((unused)), const void* u1 _U___attribute__((unused)), const void* u2 _U___attribute__((unused)), char** err)
474 | {
475 | if (!p || strlen(p) == 0u) {
476 | // This should be removed in favor of Decode As. Make it optional.
477 | *err = NULL((void*)0);
478 | return true1;
479 | }
480 |
481 | if (strcmp(p, "53") != 0){
482 | uint16_t port;
483 | if (!ws_strtou16(p, NULL((void*)0), &port)) {
484 | *err = g_strdup("Invalid port given.")g_strdup_inline ("Invalid port given.");
485 | return false0;
486 | }
487 | }
488 |
489 | *err = NULL((void*)0);
490 | return true1;
491 | }
492 |
493 | static void
494 | c_ares_ghba_sync_cb(void *arg, int status, int timeouts _U___attribute__((unused)), struct hostent *he) {
495 | sync_dns_data_t *sdd = (sync_dns_data_t *)arg;
496 | char **p;
497 |
498 | if (status == ARES_SUCCESS) {
499 | for (p = he->h_addr_list; *p != NULL((void*)0); p++) {
500 | switch(sdd->family) {
501 | case AF_INET2:
502 | add_ipv4_name(sdd->addr.ip4, he->h_name, false0);
503 | break;
504 | case AF_INET610:
505 | add_ipv6_name(&sdd->addr.ip6, he->h_name, false0);
506 | break;
507 | default:
508 | /* Throw an exception? */
509 | break;
510 | }
511 | }
512 |
513 | }
514 |
515 | /*
516 | * Let our caller know that this is complete.
517 | */
518 | *sdd->completed = true1;
519 |
520 | /*
521 | * Free the structure for this call.
522 | */
523 | g_free(sdd);
524 | }
525 |
526 | static void
527 | wait_for_sync_resolv(bool_Bool *completed) {
528 | int nfds;
529 | fd_set rfds, wfds;
530 | struct timeval tv;
531 |
532 | while (!*completed) {
533 | /*
534 | * Not yet resolved; wait for something to show up on the
535 | * address-to-name C-ARES channel.
536 | *
537 | * To quote the source code for ares_timeout() as of C-ARES
538 | * 1.12.0, "WARNING: Beware that this is linear in the number
539 | * of outstanding requests! You are probably far better off
540 | * just calling ares_process() once per second, rather than
541 | * calling ares_timeout() to figure out when to next call
542 | * ares_process().", although we should have only one request
543 | * outstanding.
544 | * As of C-ARES 1.20.0, the ares_timeout() function is now O(1),
545 | * but we don't require that minimum version.
546 | * https://github.com/c-ares/c-ares/commit/cf99c025cfb3e21295b59923876a31a68ea2cb4b
547 | *
548 | * And, yes, we have to reset it each time, as select(), in
549 | * some OSes modifies the timeout to reflect the time remaining
550 | * (e.g., Linux) and select() in other OSes doesn't (most if not
551 | * all other UN*Xes, Windows?), so we can't rely on *either*
552 | * behavior.
553 | */
554 | tv.tv_sec = 1;
555 | tv.tv_usec = 0;
556 |
557 | FD_ZERO(&rfds)do { unsigned int __i; fd_set *__arr = (&rfds); for (__i = 0; __i < sizeof (fd_set) / sizeof (__fd_mask); ++__i) ((__arr )->__fds_bits)[__i] = 0; } while (0);
558 | FD_ZERO(&wfds)do { unsigned int __i; fd_set *__arr = (&wfds); for (__i = 0; __i < sizeof (fd_set) / sizeof (__fd_mask); ++__i) ((__arr )->__fds_bits)[__i] = 0; } while (0);
559 | nfds = ares_fds(ghba_chan, &rfds, &wfds);
560 | if (nfds > 0) {
561 | if (select(nfds, &rfds, &wfds, NULL((void*)0), &tv) == -1) { /* call to select() failed */
562 | /* If it's interrupted by a signal, no need to put out a message */
563 | if (errno(*__errno_location ()) != EINTR4)
564 | fprintf(stderrstderr, "Warning: call to select() failed, error is %s\n", g_strerror(errno(*__errno_location ())));
565 | return;
566 | }
567 | ares_process(ghba_chan, &rfds, &wfds);
568 | }
569 | }
570 | }
571 |
572 | static void
573 | process_async_dns_queue(void)
574 | {
575 | wmem_list_frame_t* head;
576 | async_dns_queue_msg_t *caqm;
577 |
578 | if (async_dns_queue_head == NULL((void*)0))
579 | return;
580 |
581 | if (!g_mutex_trylock(&async_dns_queue_mtx))
582 | return;
583 |
584 | head = wmem_list_head(async_dns_queue_head);
585 |
586 | while (head != NULL((void*)0) && async_dns_in_flight <= name_resolve_concurrency) {
587 | caqm = (async_dns_queue_msg_t *)wmem_list_frame_data(head);
588 | wmem_list_remove_frame(async_dns_queue_head, head);
589 | if (caqm->family == AF_INET2) {
590 | ares_gethostbyaddr(ghba_chan, &caqm->addr.ip4, sizeof(uint32_t), AF_INET2,
591 | c_ares_ghba_cb, caqm);
592 | async_dns_in_flight++;
593 | } else if (caqm->family == AF_INET610) {
594 | ares_gethostbyaddr(ghba_chan, &caqm->addr.ip6, sizeof(ws_in6_addr),
595 | AF_INET610, c_ares_ghba_cb, caqm);
596 | async_dns_in_flight++;
597 | }
598 |
599 | head = wmem_list_head(async_dns_queue_head);
600 | }
601 |
602 | g_mutex_unlock(&async_dns_queue_mtx);
603 | }
604 |
605 | static void
606 | wait_for_async_queue(void)
607 | {
608 | struct timeval tv = { 0, 0 };
609 | int nfds;
610 | fd_set rfds, wfds;
611 |
612 | new_resolved_objects = false0;
613 |
614 | if (!async_dns_initialized) {
615 | maxmind_db_lookup_process();
616 | return;
617 | }
618 |
619 | while (1) {
620 | /* We're switching to synchronous lookups, so process anything in
621 | * the asynchronous queue. There might be more in the queue than
622 | * name_resolve_concurrency allows, so check each cycle.
623 | */
624 | process_async_dns_queue();
625 |
626 | FD_ZERO(&rfds)do { unsigned int __i; fd_set *__arr = (&rfds); for (__i = 0; __i < sizeof (fd_set) / sizeof (__fd_mask); ++__i) ((__arr )->__fds_bits)[__i] = 0; } while (0);
627 | FD_ZERO(&wfds)do { unsigned int __i; fd_set *__arr = (&wfds); for (__i = 0; __i < sizeof (fd_set) / sizeof (__fd_mask); ++__i) ((__arr )->__fds_bits)[__i] = 0; } while (0);
628 | nfds = ares_fds(ghba_chan, &rfds, &wfds);
629 | if (nfds == 0) {
630 | /* No more requests waiting for reply; we're done here. */
631 | break;
632 | }
633 |
634 | /* See comment in wait_for_sync_resolv() about ares_timeout() being
635 | * O(N) in the number of outstanding requests until c-ares 1.20, and
636 | * why we might as well just set a 1 second to select().
637 | */
638 | tv.tv_sec = 1;
639 | tv.tv_usec = 0;
640 |
641 | if (select(nfds, &rfds, &wfds, NULL((void*)0), &tv) == -1) { /* call to select() failed */
642 | /* If it's interrupted by a signal, no need to put out a message */
643 | if (errno(*__errno_location ()) != EINTR4)
644 | fprintf(stderrstderr, "Warning: call to select() failed, error is %s\n", g_strerror(errno(*__errno_location ())));
645 | return;
646 | }
647 | ares_process(ghba_chan, &rfds, &wfds);
648 | }
649 |
650 | maxmind_db_lookup_process();
651 | return;
652 | }
653 |
654 | static void
655 | sync_lookup_ip4(const uint32_t addr)
656 | {
657 | bool_Bool completed = false0;
658 | sync_dns_data_t *sdd;
659 |
660 | if (!async_dns_initialized) {
661 | /*
662 | * c-ares not initialized. Bail out.
663 | */
664 | return;
665 | }
666 |
667 | /*
668 | * Start the request.
669 | */
670 | sdd = g_new(sync_dns_data_t, 1)((sync_dns_data_t *) g_malloc_n ((1), sizeof (sync_dns_data_t )));
671 | sdd->family = AF_INET2;
672 | sdd->addr.ip4 = addr;
673 | sdd->completed = &completed;
674 | ares_gethostbyaddr(ghba_chan, &addr, sizeof(uint32_t), AF_INET2,
675 | c_ares_ghba_sync_cb, sdd);
676 |
677 | /*
678 | * Now wait for it to finish.
679 | */
680 | wait_for_sync_resolv(&completed);
681 | }
682 |
683 | static void
684 | sync_lookup_ip6(const ws_in6_addr *addrp)
685 | {
686 | bool_Bool completed = false0;
687 | sync_dns_data_t *sdd;
688 |
689 | if (!async_dns_initialized) {
690 | /*
691 | * c-ares not initialized. Bail out.
692 | */
693 | return;
694 | }
695 |
696 | /*
697 | * Start the request.
698 | */
699 | sdd = g_new(sync_dns_data_t, 1)((sync_dns_data_t *) g_malloc_n ((1), sizeof (sync_dns_data_t )));
700 | sdd->family = AF_INET610;
701 | memcpy(&sdd->addr.ip6, addrp, sizeof(sdd->addr.ip6));
702 | sdd->completed = &completed;
703 | ares_gethostbyaddr(ghba_chan, addrp, sizeof(ws_in6_addr), AF_INET610,
704 | c_ares_ghba_sync_cb, sdd);
705 |
706 | /*
707 | * Now wait for it to finish.
708 | */
709 | wait_for_sync_resolv(&completed);
710 | }
711 |
712 | void
713 | set_resolution_synchrony(bool_Bool synchronous)
714 | {
715 | resolve_synchronously = synchronous;
716 | maxmind_db_set_synchrony(synchronous);
717 |
718 | if (synchronous) {
719 | wait_for_async_queue();
720 | }
721 | }
722 |
723 | static void
724 | c_ares_set_dns_servers(void)
725 | {
726 | if ((!async_dns_initialized) || (!use_custom_dns_server_list))
727 | return;
728 |
729 | if (ndnsservers == 0) {
730 | //clear the list of servers. This may effectively disable name resolution
731 | ares_set_servers_ports(ghba_chan, NULL((void*)0));
732 | ares_set_servers_ports(ghbn_chan, NULL((void*)0));
733 | } else {
734 | struct ares_addr_port_node* servers = wmem_alloc_array(NULL, struct ares_addr_port_node, ndnsservers)((struct ares_addr_port_node*)wmem_alloc((((void*)0)), (((((ndnsservers )) <= 0) || ((size_t)sizeof(struct ares_addr_port_node) > (9223372036854775807L / (size_t)((ndnsservers))))) ? 0 : (sizeof (struct ares_addr_port_node) * ((ndnsservers))))));
735 | ws_in4_addr ipv4addr;
736 | ws_in6_addr ipv6addr;
737 | bool_Bool invalid_IP_found = false0;
738 | struct ares_addr_port_node* server;
739 | unsigned i;
740 | for (i = 0, server = servers; i < ndnsservers-1; i++, server++) {
741 | if (ws_inet_pton6(dnsserverlist_uats[i].ipaddr, &ipv6addr)) {
742 | server->family = AF_INET610;
743 | memcpy(&server->addr.addr6, &ipv6addr, 16);
744 | } else if (ws_inet_pton4(dnsserverlist_uats[i].ipaddr, &ipv4addr)) {
745 | server->family = AF_INET2;
746 | memcpy(&server->addr.addr4, &ipv4addr, 4);
747 | } else {
748 | //This shouldn't happen, but just in case...
749 | invalid_IP_found = true1;
750 | server->family = 0;
751 | memset(&server->addr.addr4, 0, 4);
752 | break;
753 | }
754 |
755 | server->udp_port = (int)dnsserverlist_uats[i].udp_port;
756 | server->tcp_port = (int)dnsserverlist_uats[i].tcp_port;
757 |
758 | server->next = (server+1);
759 | }
760 | if (!invalid_IP_found) {
761 | if (ws_inet_pton6(dnsserverlist_uats[i].ipaddr, &ipv6addr)) {
762 | server->family = AF_INET610;
763 | memcpy(&server->addr.addr6, &ipv6addr, 16);
764 | }
765 | else if (ws_inet_pton4(dnsserverlist_uats[i].ipaddr, &ipv4addr)) {
766 | server->family = AF_INET2;
767 | memcpy(&server->addr.addr4, &ipv4addr, 4);
768 | } else {
769 | //This shouldn't happen, but just in case...
770 | server->family = 0;
771 | memset(&server->addr.addr4, 0, 4);
772 | }
773 | }
774 | server->udp_port = (int)dnsserverlist_uats[i].udp_port;
775 | server->tcp_port = (int)dnsserverlist_uats[i].tcp_port;
776 |
777 | server->next = NULL((void*)0);
778 |
779 | ares_set_servers_ports(ghba_chan, servers);
780 | ares_set_servers_ports(ghbn_chan, servers);
781 | wmem_free(NULL((void*)0), servers);
782 | }
783 | }
784 |
785 | typedef struct {
786 | uint32_t mask;
787 | size_t mask_length;
788 | const char* name; /* Shallow copy */
789 | } subnet_entry_t;
790 |
791 | /* Maximum supported line length of hosts, services, manuf, etc. */
792 | #define MAX_LINELEN1024 1024
793 |
794 | /** Read a line without trailing (CR)LF. Returns -1 on failure. */
795 | static int
796 | fgetline(char *buf, int size, FILE *fp)
797 | {
798 | if (fgets(buf, size, fp)) {
799 | int len = (int)strcspn(buf, "\r\n");
800 | buf[len] = '\0';
801 | return len;
802 | }
803 | return -1;
804 |
805 | } /* fgetline */
806 |
807 |
808 | /*
809 | * Local function definitions
810 | */
811 | static subnet_entry_t subnet_lookup(const uint32_t addr);
812 | static void subnet_entry_set(uint32_t subnet_addr, const uint8_t mask_length, const char* name);
813 |
814 | static unsigned serv_port_custom_hash(const void *k)
815 | {
816 | const serv_port_key_t *key = (const serv_port_key_t*)k;
817 | return key->port + (key->type << 16);
818 | }
819 |
820 | static gboolean serv_port_custom_equal(const void *k1, const void *k2)
821 | {
822 | const serv_port_key_t *key1 = (const serv_port_key_t*)k1;
823 | const serv_port_key_t *key2 = (const serv_port_key_t*)k2;
824 |
825 | return (key1->port == key2->port) && (key1->type == key2->type);
826 | }
827 |
828 | static void
829 | add_custom_service_name(port_type proto, const unsigned port, const char *service_name)
830 | {
831 | char *name;
832 | serv_port_key_t *key, *orig_key;
833 |
834 | key = wmem_new(addr_resolv_scope, serv_port_key_t)((serv_port_key_t*)wmem_alloc((addr_resolv_scope), sizeof(serv_port_key_t )));
835 | key->port = (uint16_t)port;
836 | key->type = proto;
837 |
838 | if (wmem_map_lookup_extended(serv_port_custom_hashtable, key, (const void**)&orig_key, (void**)&name)) {
839 | wmem_free(addr_resolv_scope, orig_key);
840 | wmem_free(addr_resolv_scope, name);
841 | }
842 |
843 | name = wmem_strdup(addr_resolv_scope, service_name);
844 | wmem_map_insert(serv_port_custom_hashtable, key, name);
845 |
846 | // A new custom entry is not a new resolved object.
847 | // new_resolved_objects = true;
848 | }
849 |
850 | static void
851 | add_service_name(port_type proto, const unsigned port, const char *service_name)
852 | {
853 | serv_port_key_t *key = wmem_new(addr_resolv_scope, serv_port_key_t)((serv_port_key_t*)wmem_alloc((addr_resolv_scope), sizeof(serv_port_key_t )));
854 | key->port = (uint16_t)port;
855 | key->type = proto;
856 |
857 | wmem_map_insert(serv_port_hashtable, key, (void*)service_name);
858 |
859 | new_resolved_objects = true1;
860 | }
861 |
862 | static void
863 | parse_service_line (char *line)
864 | {
865 | char *cp;
866 | char *service;
867 | char *port;
868 | port_type proto;
869 | struct cb_serv_data cb_data;
870 | range_t *port_rng = NULL((void*)0);
871 |
872 | if ((cp = strchr(line, '#')))
873 | *cp = '\0';
874 |
875 | if ((cp = strtok(line, " \t")) == NULL((void*)0))
876 | return;
877 |
878 | service = cp;
879 |
880 | if ((cp = strtok(NULL((void*)0), " \t")) == NULL((void*)0))
881 | return;
882 |
883 | port = cp;
884 |
885 | if (strtok(cp, "/") == NULL((void*)0))
886 | return;
887 |
888 | if (range_convert_str(NULL((void*)0), &port_rng, port, UINT16_MAX(65535)) != CVT_NO_ERROR) {
889 | wmem_free (NULL((void*)0), port_rng);
890 | return;
891 | }
892 |
893 | while ((cp = strtok(NULL((void*)0), "/")) != NULL((void*)0)) {
894 | if (strcmp(cp, "tcp") == 0) {
895 | proto = PT_TCP;
896 | }
897 | else if (strcmp(cp, "udp") == 0) {
898 | proto = PT_UDP;
899 | }
900 | else if (strcmp(cp, "sctp") == 0) {
901 | proto = PT_SCTP;
902 | }
903 | else if (strcmp(cp, "dccp") == 0) {
904 | proto = PT_DCCP;
905 | }
906 | else {
907 | break;
908 | }
909 | cb_data.service = service;
910 | cb_data.proto = proto;
911 | range_foreach(port_rng, add_serv_port_cb, &cb_data);
912 | }
913 |
914 | wmem_free (NULL((void*)0), port_rng);
915 | } /* parse_service_line */
916 |
917 |
918 | static void
919 | add_serv_port_cb(const uint32_t port, void *ptr)
920 | {
921 | struct cb_serv_data *cb_data = (struct cb_serv_data *)ptr;
922 |
923 | if ( port ) {
924 | add_custom_service_name(cb_data->proto, port, cb_data->service);
925 | }
926 | }
927 |
928 |
929 | static bool_Bool
930 | parse_services_file(const char * path)
931 | {
932 | FILE *serv_p;
933 | char buf[MAX_LINELEN1024];
934 |
935 | /* services hash table initialization */
936 | serv_p = ws_fopenfopen(path, "r");
937 |
938 | if (serv_p == NULL((void*)0))
939 | return false0;
940 |
941 | while (fgetline(buf, sizeof(buf), serv_p) >= 0) {
942 | parse_service_line(buf);
943 | }
944 |
945 | fclose(serv_p);
946 | return true1;
947 | }
948 |
949 | /* -----------------
950 | * unsigned integer to ascii
951 | */
952 | static char *
953 | wmem_utoa(wmem_allocator_t *allocator, unsigned port)
954 | {
955 | char *bp = (char *)wmem_alloc(allocator, MAXNAMELEN64);
956 |
957 | /* XXX, uint32_to_str() ? */
958 | uint32_to_str_buf(port, bp, MAXNAMELEN64);
959 | return bp;
960 | }
961 |
962 | static const char *
963 | _serv_name_lookup(port_type proto, unsigned port)
964 | {
965 | const char* name = NULL((void*)0);
966 | ws_services_proto_t p;
967 | ws_services_entry_t const *serv;
968 |
969 | const serv_port_key_t custom_key = { (uint16_t)port, proto };
970 | /* Look in the cache. Use an extended lookup so we can distinguish a port
971 | * we already tried but had no name from one we haven't tried. */
972 | if (!wmem_map_lookup_extended(serv_port_hashtable, &custom_key, NULL((void*)0), (void **)&name)) {
973 | /* Try the user custom table */
974 | name = wmem_map_lookup(serv_port_custom_hashtable, &custom_key);
975 |
976 | if (name == NULL((void*)0)) {
977 | /* now look in the global tables */
978 | bool_Bool valid_proto = true1;
979 | switch(proto) {
980 | case PT_TCP: p = ws_tcp; break;
981 | case PT_UDP: p = ws_udp; break;
982 | case PT_SCTP: p = ws_sctp; break;
983 | case PT_DCCP: p = ws_dccp; break;
984 | default: valid_proto = false0;
985 | }
986 | if (valid_proto) {
987 | serv = global_services_lookup(port, p);
988 | if (serv) {
989 | name = serv->name;
990 | }
991 | }
992 | }
993 |
994 | /* Cache result (even if NULL, so we can know we have no result.) */
995 | add_service_name(proto, port, name);
996 | }
997 |
998 | return name;
999 | }
1000 |
1001 | const char *
1002 | try_serv_name_lookup(port_type proto, unsigned port)
1003 | {
1004 | return (proto == PT_NONE) ? NULL((void*)0) : _serv_name_lookup(proto, port);
1005 | }
1006 |
1007 | const char *
1008 | serv_name_lookup(port_type proto, unsigned port)
1009 | {
1010 | const char *name;
1011 |
1012 | /* first look for the name */
1013 | name = _serv_name_lookup(proto, port);
1014 | if (name != NULL((void*)0))
1015 | return name;
1016 |
1017 | /* No resolved name. Do we have a cached numeric string? */
1018 | const serv_port_key_t key = { (uint16_t)port, PT_NONE };
1019 | name = (const char*)wmem_map_lookup(serv_port_hashtable, &key);
1020 | /* No name; create the numeric string. */
1021 | if (name == NULL((void*)0)) {
1022 | name = wmem_strdup_printf(addr_resolv_scope, "%u", port);
1023 | add_service_name(PT_NONE, port, name);
1024 | }
1025 |
1026 | return name;
1027 | }
1028 |
1029 | static void
1030 | initialize_services(const char* app_env_var_prefix)
1031 | {
1032 | ws_assert(serv_port_hashtable == NULL)do { if ((1) && !(serv_port_hashtable == ((void*)0))) ws_log_fatal_full("", LOG_LEVEL_ERROR, "epan/addr_resolv.c", 1032, __func__, "assertion failed: %s", "serv_port_hashtable == ((void*)0)" ); } while (0);
1033 | serv_port_hashtable = wmem_map_new(addr_resolv_scope, serv_port_custom_hash, serv_port_custom_equal);
1034 | ws_assert(serv_port_custom_hashtable == NULL)do { if ((1) && !(serv_port_custom_hashtable == ((void *)0))) ws_log_fatal_full("", LOG_LEVEL_ERROR, "epan/addr_resolv.c" , 1034, __func__, "assertion failed: %s", "serv_port_custom_hashtable == ((void*)0)" ); } while (0);
1035 | serv_port_custom_hashtable = wmem_map_new(addr_resolv_scope, serv_port_custom_hash, serv_port_custom_equal);
1036 |
1037 | /* Compute the pathname of the global services file. */
1038 | if (g_services_path == NULL((void*)0)) {
1039 | g_services_path = get_datafile_path(ENAME_SERVICES"services", app_env_var_prefix);
1040 | }
1041 | parse_services_file(g_services_path);
1042 |
1043 | /* Compute the pathname of the personal services file */
1044 | if (g_pservices_path == NULL((void*)0)) {
1045 | /* Check profile directory before personal configuration */
1046 | g_pservices_path = get_persconffile_path(ENAME_SERVICES"services", true1, app_env_var_prefix);
1047 | if (!parse_services_file(g_pservices_path)) {
1048 | g_free(g_pservices_path);
1049 | g_pservices_path = get_persconffile_path(ENAME_SERVICES"services", false0, app_env_var_prefix);
1050 | parse_services_file(g_pservices_path);
1051 | }
1052 | }
1053 | }
1054 |
1055 | static void
1056 | service_name_lookup_cleanup(void)
1057 | {
1058 | serv_port_hashtable = NULL((void*)0);
1059 | serv_port_custom_hashtable = NULL((void*)0);
1060 | g_free(g_services_path);
1061 | g_services_path = NULL((void*)0);
1062 | g_free(g_pservices_path);
1063 | g_pservices_path = NULL((void*)0);
1064 | }
1065 |
1066 | static void
1067 | parse_enterprises_line (char *line)
1068 | {
1069 | char *tok, *dec_str, *org_str;
1070 | uint32_t dec;
1071 | bool_Bool had_comment = false0;
1072 |
1073 | /* Stop the line at any comment found */
1074 | if ((tok = strchr(line, '#'))) {
1075 | *tok = '\0';
1076 | had_comment = true1;
1077 | }
1078 | /* Get enterprise number */
1079 | dec_str = strtok(line, " \t");
1080 | if (!dec_str)
1081 | return;
1082 | /* Get enterprise name */
1083 | org_str = strtok(NULL((void*)0), ""); /* everything else */
1084 | if (org_str && had_comment) {
1085 | /* Only need to strip after (between name and where comment was) */
1086 | org_str = g_strchomp(org_str);
1087 | }
1088 | if (!org_str)
1089 | return;
1090 |
1091 | /* Add entry using number as key */
1092 | if (!ws_strtou32(dec_str, NULL((void*)0), &dec))
1093 | return;
1094 | g_hash_table_insert(enterprises_hashtable, GUINT_TO_POINTER(dec)((gpointer) (gulong) (dec)), g_strdup(org_str)g_strdup_inline (org_str));
1095 | }
1096 |
1097 |
1098 | static bool_Bool
1099 | parse_enterprises_file(const char * path)
1100 | {
1101 | FILE *fp;
1102 | char buf[MAX_LINELEN1024];
1103 |
1104 | fp = ws_fopenfopen(path, "r");
1105 | if (fp == NULL((void*)0))
1106 | return false0;
1107 |
1108 | while (fgetline(buf, sizeof(buf), fp) >= 0) {
1109 | parse_enterprises_line(buf);
1110 | }
1111 |
1112 | fclose(fp);
1113 | return true1;
1114 | }
1115 |
1116 | static void
1117 | initialize_enterprises(const char* app_env_var_prefix)
1118 | {
1119 | ws_assert(enterprises_hashtable == NULL)do { if ((1) && !(enterprises_hashtable == ((void*)0) )) ws_log_fatal_full("", LOG_LEVEL_ERROR, "epan/addr_resolv.c" , 1119, __func__, "assertion failed: %s", "enterprises_hashtable == ((void*)0)" ); } while (0);
1120 | enterprises_hashtable = g_hash_table_new_full(NULL((void*)0), NULL((void*)0), NULL((void*)0), g_free);
1121 |
1122 | if (g_enterprises_path == NULL((void*)0)) {
1123 | g_enterprises_path = get_datafile_path(ENAME_ENTERPRISES"enterprises", app_env_var_prefix);
1124 | }
1125 | parse_enterprises_file(g_enterprises_path);
1126 |
1127 | /* Populate entries from profile or personal */
1128 | if (g_penterprises_path == NULL((void*)0)) {
1129 | /* Check profile directory before personal configuration */
1130 | g_penterprises_path = get_persconffile_path(ENAME_ENTERPRISES"enterprises", true1, app_env_var_prefix);
1131 | if (!file_exists(g_penterprises_path)) {
1132 | g_free(g_penterprises_path);
1133 | g_penterprises_path = get_persconffile_path(ENAME_ENTERPRISES"enterprises", false0, app_env_var_prefix);
1134 | }
1135 | }
1136 | /* Parse personal file (if present) */
1137 | parse_enterprises_file(g_penterprises_path);
1138 | }
1139 |
1140 | const char *
1141 | try_enterprises_lookup(uint32_t value)
1142 | {
1143 | /* Trying extra entries first. N.B. This does allow entries to be overwritten and found.. */
1144 | const char *name = (const char *)g_hash_table_lookup(enterprises_hashtable, GUINT_TO_POINTER(value)((gpointer) (gulong) (value)));
1145 | if (name)
1146 | return name;
1147 |
1148 | return val_to_str_ext_const(value, &enterprise_val_ext, "Unknown");
1149 | }
1150 |
1151 | const char *
1152 | enterprises_lookup(uint32_t value, const char *unknown_str)
1153 | {
1154 | const char *s;
1155 |
1156 | s = try_enterprises_lookup(value);
1157 | if (s != NULL((void*)0))
1158 | return s;
1159 | if (unknown_str != NULL((void*)0))
1160 | return unknown_str;
1161 | return "<Unknown>";
1162 | }
1163 |
1164 | void
1165 | enterprises_base_custom(char *buf, uint32_t value)
1166 | {
1167 | const char *s;
1168 |
1169 | if ((s = try_enterprises_lookup(value)) == NULL((void*)0))
1170 | s = ITEM_LABEL_UNKNOWN_STR"Unknown";
1171 | snprintf(buf, ITEM_LABEL_LENGTH240, "%s (%u)", s, value);
1172 | }
1173 |
1174 | static void
1175 | enterprises_cleanup(void)
1176 | {
1177 | ws_assert(enterprises_hashtable)do { if ((1) && !(enterprises_hashtable)) ws_log_fatal_full ("", LOG_LEVEL_ERROR, "epan/addr_resolv.c", 1177, __func__, "assertion failed: %s" , "enterprises_hashtable"); } while (0);
1178 | g_hash_table_destroy(enterprises_hashtable);
1179 | enterprises_hashtable = NULL((void*)0);
1180 | g_free(g_enterprises_path);
1181 | g_enterprises_path = NULL((void*)0);
1182 | g_free(g_penterprises_path);
1183 | g_penterprises_path = NULL((void*)0);
1184 | }
1185 |
1186 | /* Fill in an IP4 structure with info from subnets file or just with the
1187 | * string form of the address.
1188 | */
1189 | bool_Bool
1190 | fill_dummy_ip4(const unsigned addr, hashipv4_t* volatile tp)
1191 | {
1192 | subnet_entry_t subnet_entry;
1193 |
1194 | /* return value : true if addr matches any subnet */
1195 | bool_Bool cidr_covered = false0;
1196 |
1197 | /* Overwrite if we get async DNS reply */
1198 |
1199 | /* Do we have a subnet for this address? */
1200 | subnet_entry = subnet_lookup(addr);
1201 | if (0 != subnet_entry.mask) {
1202 | /* Print name, then '.' then IP address after subnet mask */
1203 | uint32_t host_addr;
1204 | char buffer[WS_INET_ADDRSTRLEN16];
1205 | char* paddr;
1206 | size_t i;
1207 |
1208 | host_addr = addr & (~subnet_entry.mask);
1209 | ip_addr_to_str_buf(&host_addr, buffer, WS_INET_ADDRSTRLEN16);
1210 | paddr = buffer;
1211 |
1212 | /* Skip to first octet that is not totally masked
1213 | * If length of mask is 32, we chomp the whole address.
1214 | * If the address string starts '.' (should not happen?),
1215 | * we skip that '.'.
1216 | */
1217 | i = subnet_entry.mask_length / 8;
1218 | while(*(paddr) != '\0' && i > 0) {
1219 | if (*(++paddr) == '.') {
1220 | --i;
1221 | }
1222 | }
1223 |
1224 | /* There are more efficient ways to do this, but this is safe if we
1225 | * trust snprintf and MAXDNSNAMELEN
1226 | */
1227 | snprintf(tp->name, MAXDNSNAMELEN256, "%s%s", subnet_entry.name, paddr);
1228 |
1229 | /* Evaluate the subnet in CIDR notation
1230 | * Reuse buffers built above
1231 | */
1232 | uint32_t subnet_addr;
1233 | subnet_addr = addr & subnet_entry.mask;
1234 |
1235 | char buffer_subnet[WS_INET_ADDRSTRLEN16];
1236 | ip_addr_to_str_buf(&subnet_addr, buffer_subnet, WS_INET_ADDRSTRLEN16);
1237 |
1238 | char buffer_cidr[WS_INET_CIDRADDRSTRLEN19];
1239 | snprintf(buffer_cidr, WS_INET_CIDRADDRSTRLEN19, "%s%s%u", buffer_subnet, "/", (unsigned)subnet_entry.mask_length);
1240 |
1241 | snprintf(tp->cidr_addr, WS_INET_CIDRADDRSTRLEN19, "%s%s%u", buffer_subnet, "/", (unsigned)subnet_entry.mask_length);
1242 | cidr_covered = true1;
1243 | } else {
1244 | /* XXX: This means we end up printing "1.2.3.4 (1.2.3.4)" in many cases */
1245 | ip_addr_to_str_buf(&addr, tp->name, MAXDNSNAMELEN256);
1246 |
1247 | /* IP does not belong to any known subnet, just indicate this IP without "/.32" */
1248 | ip_addr_to_str_buf(&addr, tp->cidr_addr, MAXDNSNAMELEN256);
1249 | }
1250 | return cidr_covered;
1251 | }
1252 |
1253 |
1254 | /* Forward declaration — defined later with the IPv6 subnet functions. */
1255 | static subnet_entry_v6_t subnet6_lookup(const ws_in6_addr *addr);
1256 |
1257 | /* Fill in an IP6 structure with info from subnetIpv6 file or the string form
1258 | * of the address.
1259 | */
1260 | static void
1261 | fill_dummy_ip6(hashipv6_t* volatile tp)
1262 | {
1263 | ws_in6_addr addr;
1264 | memcpy(addr.bytes, tp->addr, 16);
1265 |
1266 | /* Overwrite if we get async DNS reply */
1267 | subnet_entry_v6_t subnet_entry = subnet6_lookup(&addr);
1268 | if (subnet_entry.mask_length != 0) {
1269 | ws_in6_addr host_addr;
1270 | for (int i = 0; i < 16; i++)
1271 | host_addr.bytes[i] = addr.bytes[i] & ~subnet_entry.mask[i];
1272 |
1273 | /* Build host-portion 16-bit groups directly from bytes — avoids
1274 | * ambiguity from IPv6 '::' zero-compression in string scanning. */
1275 | size_t first_host_group = subnet_entry.mask_length / 16;
1276 | wmem_strbuf_t *host_strbuf = wmem_strbuf_new_sized(addr_resolv_scope,
1277 | WS_INET6_ADDRSTRLEN46);
1278 | for (size_t g = first_host_group; g < 8; g++) {
1279 | if (g > first_host_group)
1280 | wmem_strbuf_append_c(host_strbuf, ':');
1281 | uint16_t grp = ((uint16_t)host_addr.bytes[g * 2] << 8)
1282 | | host_addr.bytes[g * 2 + 1];
1283 | wmem_strbuf_append_printf(host_strbuf, "%x", (unsigned)grp);
1284 | }
1285 |
1286 | /* Assemble name: "subnetName:host_portion" */
1287 | wmem_strbuf_t *name_strbuf = wmem_strbuf_new_sized(addr_resolv_scope,
1288 | MAXDNSNAMELEN256);
1289 | wmem_strbuf_append(name_strbuf, subnet_entry.name);
1290 | if (wmem_strbuf_get_len(host_strbuf) > 0) {
1291 | wmem_strbuf_append_c(name_strbuf, ':');
1292 | wmem_strbuf_append(name_strbuf, wmem_strbuf_get_str(host_strbuf));
1293 | }
1294 | g_strlcpy(tp->name, wmem_strbuf_get_str(name_strbuf), MAXDNSNAMELEN256);
1295 | wmem_strbuf_destroy(name_strbuf);
1296 | wmem_strbuf_destroy(host_strbuf);
1297 |
1298 | /* Build CIDR notation for cidr_addr */
1299 | ws_in6_addr net_addr;
1300 | for (int i = 0; i < 16; i++)
1301 | net_addr.bytes[i] = addr.bytes[i] & subnet_entry.mask[i];
1302 | char net_buf[WS_INET6_ADDRSTRLEN46];
1303 | ip6_to_str_buf(&net_addr, net_buf, sizeof(net_buf));
1304 | wmem_strbuf_t *cidr_strbuf = wmem_strbuf_new_sized(addr_resolv_scope,
1305 | WS_INET6_CIDRADDRSTRLEN50);
1306 | wmem_strbuf_append_printf(cidr_strbuf, "%s/%zu", net_buf,
1307 | subnet_entry.mask_length);
1308 | g_strlcpy(tp->cidr_addr, wmem_strbuf_get_str(cidr_strbuf),
1309 | WS_INET6_CIDRADDRSTRLEN50);
1310 | wmem_strbuf_destroy(cidr_strbuf);
1311 | } else {
1312 | (void)g_strlcpy(tp->name, tp->ip6, MAXDNSNAMELEN256);
1313 | (void)g_strlcpy(tp->cidr_addr, tp->ip6, WS_INET6_CIDRADDRSTRLEN50);
1314 | }
1315 | }
1316 |
1317 | static void
1318 | c_ares_ghba_cb(void *arg, int status, int timeouts _U___attribute__((unused)), struct hostent *he) {
1319 | async_dns_queue_msg_t *caqm = (async_dns_queue_msg_t *)arg;
1320 | char **p;
1321 |
1322 | if (!caqm) return;
1323 | /* XXX, what to do if async_dns_in_flight == 0? */
1324 | async_dns_in_flight--;
1325 |
1326 | if (status == ARES_SUCCESS) {
1327 | for (p = he->h_addr_list; *p != NULL((void*)0); p++) {
1328 | switch(caqm->family) {
1329 | case AF_INET2:
1330 | add_ipv4_name(caqm->addr.ip4, he->h_name, false0);
1331 | break;
1332 | case AF_INET610:
1333 | add_ipv6_name(&caqm->addr.ip6, he->h_name, false0);
1334 | break;
1335 | default:
1336 | /* Throw an exception? */
1337 | break;
1338 | }
1339 | }
1340 | }
1341 | wmem_free(addr_resolv_scope, caqm);
1342 | }
1343 |
1344 | /* --------------- */
1345 | hashipv4_t *
1346 | new_ipv4(const unsigned addr)
1347 | {
1348 | hashipv4_t *tp = wmem_new(addr_resolv_scope, hashipv4_t)((hashipv4_t*)wmem_alloc((addr_resolv_scope), sizeof(hashipv4_t )));
1349 | tp->addr = addr;
1350 | tp->flags = 0;
1351 | tp->name[0] = '\0';
1352 | ip_addr_to_str_buf(&addr, tp->ip, sizeof(tp->ip));
1353 | return tp;
1354 | }
1355 |
1356 | static hashipv4_t *
1357 | host_lookup(const unsigned addr)
1358 | {
1359 | hashipv4_t * volatile tp;
1360 |
1361 | tp = (hashipv4_t *)wmem_map_lookup(ipv4_hash_table, GUINT_TO_POINTER(addr)((gpointer) (gulong) (addr)));
1362 | if (tp == NULL((void*)0)) {
1363 | /*
1364 | * We don't already have an entry for this host name; create one,
1365 | * and then try to resolve it.
1366 | */
1367 | tp = new_ipv4(addr);
1368 | fill_dummy_ip4(addr, tp);
1369 | wmem_map_insert(ipv4_hash_table, GUINT_TO_POINTER(addr)((gpointer) (gulong) (addr)), tp);
1370 | } else if (tp->flags & TRIED_OR_RESOLVED_MASK((1U<<0) | (1U<<1))) {
1371 | return tp;
1372 | }
1373 |
1374 | /*
1375 | * This hasn't been resolved yet, and we haven't tried to
1376 | * resolve it already.
1377 | */
1378 |
1379 | if (!gbl_resolv_flags.network_name)
1380 | return tp;
1381 |
1382 | if (gbl_resolv_flags.use_external_net_name_resolver) {
1383 | tp->flags |= TRIED_RESOLVE_ADDRESS(1U<<0);
1384 |
1385 | if (async_dns_initialized) {
1386 | /* c-ares is initialized, so we can use it */
1387 | if (resolve_synchronously || name_resolve_concurrency == 0) {
1388 | /*
1389 | * Either all names are to be resolved synchronously or
1390 | * the concurrency level is 0; do the resolution
1391 | * synchronously.
1392 | */
1393 | sync_lookup_ip4(addr);
1394 | } else {
1395 | /*
1396 | * Names are to be resolved asynchronously, and we
1397 | * allow at least one asynchronous request in flight;
1398 | * post an asynchronous request.
1399 | */
1400 | async_dns_queue_msg_t *caqm;
1401 |
1402 | caqm = wmem_new(addr_resolv_scope, async_dns_queue_msg_t)((async_dns_queue_msg_t*)wmem_alloc((addr_resolv_scope), sizeof (async_dns_queue_msg_t)));
1403 | caqm->family = AF_INET2;
1404 | caqm->addr.ip4 = addr;
1405 | wmem_list_append(async_dns_queue_head, (void *) caqm);
1406 | }
1407 | }
1408 | }
1409 |
1410 | return tp;
1411 |
1412 | } /* host_lookup */
1413 |
1414 | /* --------------- */
1415 | static hashipv6_t *
1416 | new_ipv6(const ws_in6_addr *addr)
1417 | {
1418 | hashipv6_t *tp = wmem_new(addr_resolv_scope, hashipv6_t)((hashipv6_t*)wmem_alloc((addr_resolv_scope), sizeof(hashipv6_t )));
1419 | memcpy(tp->addr, addr->bytes, sizeof tp->addr);
1420 | tp->flags = 0;
1421 | tp->name[0] = '\0';
1422 | ip6_to_str_buf(addr, tp->ip6, sizeof(tp->ip6));
1423 | return tp;
1424 | }
1425 |
1426 | /* ------------------------------------ */
1427 | static hashipv6_t *
1428 | host_lookup6(const ws_in6_addr *addr)
1429 | {
1430 | hashipv6_t * volatile tp;
1431 |
1432 | tp = (hashipv6_t *)wmem_map_lookup(ipv6_hash_table, addr);
1433 | if (tp == NULL((void*)0)) {
1434 | /*
1435 | * We don't already have an entry for this host name; create one,
1436 | * and then try to resolve it.
1437 | */
1438 | ws_in6_addr *addr_key;
1439 |
1440 | addr_key = wmem_new(addr_resolv_scope, ws_in6_addr)((ws_in6_addr*)wmem_alloc((addr_resolv_scope), sizeof(ws_in6_addr )));
1441 | tp = new_ipv6(addr);
1442 | memcpy(addr_key, addr, 16);
1443 | fill_dummy_ip6(tp);
1444 | wmem_map_insert(ipv6_hash_table, addr_key, tp);
1445 | } else if (tp->flags & TRIED_OR_RESOLVED_MASK((1U<<0) | (1U<<1))) {
1446 | return tp;
1447 | }
1448 |
1449 | /*
1450 | * This hasn't been resolved yet, and we haven't tried to
1451 | * resolve it already.
1452 | */
1453 |
1454 | if (!gbl_resolv_flags.network_name)
1455 | return tp;
1456 |
1457 | if (gbl_resolv_flags.use_external_net_name_resolver) {
1458 | tp->flags |= TRIED_RESOLVE_ADDRESS(1U<<0);
1459 |
1460 | if (async_dns_initialized) {
1461 | /* c-ares is initialized, so we can use it */
1462 | if (resolve_synchronously || name_resolve_concurrency == 0) {
1463 | /*
1464 | * Either all names are to be resolved synchronously or
1465 | * the concurrency level is 0; do the resolution
1466 | * synchronously.
1467 | */
1468 | sync_lookup_ip6(addr);
1469 | } else {
1470 | /*
1471 | * Names are to be resolved asynchronously, and we
1472 | * allow at least one asynchronous request in flight;
1473 | * post an asynchronous request.
1474 | */
1475 | async_dns_queue_msg_t *caqm;
1476 |
1477 | caqm = wmem_new(addr_resolv_scope, async_dns_queue_msg_t)((async_dns_queue_msg_t*)wmem_alloc((addr_resolv_scope), sizeof (async_dns_queue_msg_t)));
1478 | caqm->family = AF_INET610;
1479 | memcpy(&caqm->addr.ip6, addr, sizeof(caqm->addr.ip6));
1480 | wmem_list_append(async_dns_queue_head, (void *) caqm);
1481 | }
1482 | }
1483 | }
1484 |
1485 | return tp;
1486 |
1487 | } /* host_lookup6 */
1488 |
1489 | /*
1490 | * Ethernet / manufacturer resolution
1491 | *
1492 | * The following functions implement ethernet address resolution and
1493 | * ethers files parsing (see ethers(4)).
1494 | *
1495 | * The manuf file has the same format as ethers(4) except that names are
1496 | * truncated to MAXMANUFLEN-1 (8) characters and that an address contains
1497 | * only 3 bytes (instead of 6).
1498 | *
1499 | * Notes:
1500 | *
1501 | * I decide to not use the existing functions (see ethers(3) on some
1502 | * operating systems) for the following reasons:
1503 | * - performance gains (use of hash tables and some other enhancements),
1504 | * - use of two ethers files (system-wide and per user),
1505 | * - avoid the use of NIS maps,
1506 | * - lack of these functions on some systems.
1507 | *
1508 | * So the following functions do _not_ behave as the standard ones.
1509 | *
1510 | * -- Laurent.
1511 | */
1512 |
1513 | /*
1514 | * Converts Ethernet addresses of the form aa:bb:cc or aa:bb:cc:dd:ee:ff/28.
1515 | * '-' is also supported as a separator. The
1516 | * octets must be exactly two hexadecimal characters and the mask must be either
1517 | * 28 or 36. Pre-condition: cp MUST be at least 21 bytes.
1518 | */
1519 | static bool_Bool
1520 | parse_ether_address_fast(const unsigned char *cp, ether_t *eth, unsigned int *mask,
1521 | const bool_Bool accept_mask)
1522 | {
1523 | /* XXX copied from strutil.c */
1524 | /* a map from ASCII hex chars to their value */
1525 | static const int8_t str_to_nibble[256] = {
1526 | -1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,
1527 | -1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,
1528 | -1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,
1529 | 0, 1, 2, 3, 4, 5, 6, 7, 8, 9,-1,-1,-1,-1,-1,-1,
1530 | -1,10,11,12,13,14,15,-1,-1,-1,-1,-1,-1,-1,-1,-1,
1531 | -1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,
1532 | -1,10,11,12,13,14,15,-1,-1,-1,-1,-1,-1,-1,-1,-1,
1533 | -1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,
1534 | -1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,
1535 | -1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,
1536 | -1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,
1537 | -1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,
1538 | -1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,
1539 | -1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,
1540 | -1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,
1541 | -1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1
1542 | };
1543 | const uint8_t *str_to_nibble_usg = (const uint8_t *)str_to_nibble;
1544 |
1545 | unsigned char sep = cp[2];
1546 | if ((sep != ':' && sep != '-') || cp[5] != sep) {
1547 | /* Unexpected separators. */
1548 | return false0;
1549 | }
1550 |
1551 | /* N.B. store octet values in an int to detect invalid (-1) entries */
1552 | int num0 = (str_to_nibble_usg[cp[0]] << 4) | (int8_t)str_to_nibble_usg[cp[1]];
1553 | int num1 = (str_to_nibble_usg[cp[3]] << 4) | (int8_t)str_to_nibble_usg[cp[4]];
1554 | int num2 = (str_to_nibble_usg[cp[6]] << 4) | (int8_t)str_to_nibble_usg[cp[7]];
1555 |
1556 | if ((num0 | num1 | num2) & 0x100) {
1557 | /* Not hexadecimal numbers. */
1558 | return false0;
1559 | }
1560 |
1561 | eth->addr[0] = (uint8_t)num0;
1562 | eth->addr[1] = (uint8_t)num1;
1563 | eth->addr[2] = (uint8_t)num2;
1564 |
1565 | if (cp[8] == '\0' && accept_mask) {
1566 | /* Indicate that this is a manufacturer ID (0 is not allowed as a mask). */
1567 | *mask = 0;
1568 | return true1;
1569 | } else if (cp[8] != sep || !accept_mask) {
1570 | /* Format not handled by this fast path. */
1571 | return false0;
1572 | }
1573 |
1574 | /* N.B. store octet values in an int to detect invalid (-1) entries */
1575 | int num3 = (str_to_nibble_usg[cp[9]] << 4) | (int8_t)str_to_nibble_usg[cp[10]];
1576 | int num4 = (str_to_nibble_usg[cp[12]] << 4) | (int8_t)str_to_nibble_usg[cp[13]];
1577 | int num5 = (str_to_nibble_usg[cp[15]] << 4) | (int8_t)str_to_nibble_usg[cp[16]];
1578 |
1579 | if (((num3 | num4 | num5) & 0x100) || cp[11] != sep || cp[14] != sep) {
1580 | /* Not hexadecimal numbers or invalid separators. */
1581 | return false0;
1582 | }
1583 |
1584 | eth->addr[3] = (uint8_t)num3;
1585 | eth->addr[4] = (uint8_t)num4;
1586 | eth->addr[5] = (uint8_t)num5;
1587 | if (cp[17] == '\0') {
1588 | /* We got 6 bytes, so this is a MAC address (48 is not allowed as a mask). */
1589 | *mask = 48;
1590 | return true1;
1591 | } else if (cp[17] != '/' || cp[20] != '\0') {
1592 | /* Format not handled by this fast path. */
1593 | return false0;
1594 | }
1595 |
1596 | int m1 = cp[18];
1597 | int m2 = cp[19];
1598 | if (m1 == '3' && m2 == '6') { /* Mask /36 */
1599 | eth->addr[4] &= 0xf0;
1600 | eth->addr[5] = 0;
1601 | *mask = 36;
1602 | return true1;
1603 | }
1604 | if (m1 == '2' && m2 == '8') { /* Mask /28 */
1605 | eth->addr[3] &= 0xf0;
1606 | eth->addr[4] = 0;
1607 | eth->addr[5] = 0;
1608 | *mask = 28;
1609 | return true1;
1610 | }
1611 | /* Unsupported mask */
1612 | return false0;
1613 | }
1614 |
1615 | /*
1616 | * If "accept_mask" is false, cp must point to an address that consists
1617 | * of exactly 6 (EUI-48) or 8 (EUI-64) bytes.
1618 | * If "accept_mask" is true, parse an up-to-6-byte sequence with an optional
1619 | * mask.
1620 | */
1621 | static bool_Bool
1622 | parse_ether_address(const char *cp, ether_t *eth, unsigned int *mask,
1623 | const bool_Bool accept_mask)
1624 | {
1625 | int i;
1626 | unsigned long num;
1627 | char *p;
1628 | char sep = '\0';
1629 |
1630 | for (i = 0; i < EUI64_ADDR_LEN8; i++) {
1631 | /* Get a hex number, 1 or 2 digits, no sign characters allowed. */
1632 | if (!g_ascii_isxdigit(*cp)((g_ascii_table[(guchar) (*cp)] & G_ASCII_XDIGIT) != 0))
1633 | return false0;
1634 | num = strtoul(cp, &p, 16);
1635 | if (p == cp)
1636 | return false0; /* failed */
1637 | if (num > 0xFF)
1638 | return false0; /* not a valid octet */
1639 | eth->addr[i] = (uint8_t) num;
1640 | cp = p; /* skip past the number */
1641 |
1642 | /* OK, what character terminated the octet? */
1643 | if (*cp == '/') {
1644 | /* "/" - this has a mask. */
1645 | if (!accept_mask) {
1646 | /* Entries with masks are not allowed in this file. */
1647 | return false0;
1648 | }
1649 | cp++; /* skip past the '/' to get to the mask */
1650 | if (!g_ascii_isdigit(*cp)((g_ascii_table[(guchar) (*cp)] & G_ASCII_DIGIT) != 0))
1651 | return false0; /* no sign allowed */
1652 | num = strtoul(cp, &p, 10);
1653 | if (p == cp)
1654 | return false0; /* failed */
1655 | cp = p; /* skip past the number */
1656 | if (*cp != '\0' && !g_ascii_isspace(*cp)((g_ascii_table[(guchar) (*cp)] & G_ASCII_SPACE) != 0))
1657 | return false0; /* bogus terminator */
1658 | if (num == 0 || num >= 48)
1659 | return false0; /* bogus mask */
1660 | /* Mask out the bits not covered by the mask */
1661 | *mask = (int)num;
1662 | for (i = 0; num >= 8; i++, num -= 8)
1663 | ; /* skip octets entirely covered by the mask */
1664 | /* Mask out the first masked octet */
1665 | eth->addr[i] &= (0xFF << (8 - num));
1666 | i++;
1667 | /* Mask out completely-masked-out octets */
1668 | for (; i < 6; i++)
1669 | eth->addr[i] = 0;
1670 | return true1;
1671 | }
1672 | if (*cp == '\0') {
1673 | /* We're at the end of the address, and there's no mask. */
1674 | if (i == 2) {
1675 | /* We got 3 bytes, so this is a manufacturer ID. */
1676 | if (!accept_mask) {
1677 | /* Manufacturer IDs are not allowed in this file */
1678 | return false0;
1679 | }
1680 | /* Indicate that this is a manufacturer ID (0 is not allowed
1681 | as a mask). */
1682 | *mask = 0;
1683 | return true1;
1684 | }
1685 |
1686 | if (i == 5) {
1687 | /* We got 6 bytes, so this is a MAC address (48 is not allowed as a mask). */
1688 | if (mask) {
1689 | *mask = 48;
1690 | }
1691 | return true1;
1692 | }
1693 |
1694 | if (i == 7) {
1695 | /* We got 8 bytes, so this is a EUI-64 address (64 is not allowed as a mask). */
1696 | if (mask) {
1697 | *mask = 64;
1698 | }
1699 | return true1;
1700 | }
1701 |
1702 | /* We didn't get 3 or 6 or 8 bytes, and there's no mask; this is
1703 | illegal. */
1704 | return false0;
1705 | } else {
1706 | if (sep == '\0') {
1707 | /* We don't know the separator used in this number; it can either
1708 | be ':', '-', or '.'. */
1709 | if (*cp != ':' && *cp != '-' && *cp != '.')
1710 | return false0;
1711 | sep = *cp; /* subsequent separators must be the same */
1712 | } else {
1713 | /* It has to be the same as the first separator */
1714 | if (*cp != sep)
1715 | return false0;
1716 | }
1717 | }
1718 | cp++;
1719 | }
1720 |
1721 | return true1;
1722 | }
1723 |
1724 | static int
1725 | parse_ether_line(char *line, ether_t *eth, unsigned int *mask,
1726 | const bool_Bool accept_mask)
1727 | {
1728 | /*
1729 | * See the ethers(4) or ethers(5) man page for ethers file format
1730 | * (not available on all systems).
1731 | * We allow both ethernet address separators (':' and '-'),
1732 | * as well as Wireshark's '.' separator.
1733 | */
1734 |
1735 | char *cp;
1736 |
1737 | line = g_strstrip(line)g_strchomp (g_strchug (line));
1738 | if (line[0] == '\0' || line[0] == '#')
1739 | return -1;
1740 |
1741 | if ((cp = strchr(line, '#'))) {
1742 | *cp = '\0';
1743 | g_strchomp(line);
1744 | }
1745 |
1746 | if ((cp = strtok(line, " \t")) == NULL((void*)0))
1747 | return -1;
1748 |
1749 | /* First try to match the common format for the large ethers file. */
1750 | if (!parse_ether_address_fast((const uint8_t*)cp, eth, mask, accept_mask)) {
1751 | /* Fallback for the well-known addresses (wka) file. */
1752 | if (!parse_ether_address(cp, eth, mask, accept_mask))
1753 | return -1;
1754 | }
1755 |
1756 | if ((cp = strtok(NULL((void*)0), " \t")) == NULL((void*)0))
1757 | return -1;
1758 |
1759 | (void) g_strlcpy(eth->name, cp, MAXNAMELEN64);
1760 |
1761 | if ((cp = strtok(NULL((void*)0), "\t")) != NULL((void*)0))
1762 | {
1763 | (void) g_strlcpy(eth->longname, cp, MAXNAMELEN64);
1764 | } else {
1765 | /* Make the long name the short name */
1766 | (void) g_strlcpy(eth->longname, eth->name, MAXNAMELEN64);
1767 | }
1768 |
1769 | return 0;
1770 |
1771 | } /* parse_ether_line */
1772 |
1773 | static FILE *eth_p;
1774 |
1775 | static void
1776 | set_ethent(char *path)
1777 | {
1778 | if (eth_p)
1779 | rewind(eth_p);
1780 | else
1781 | eth_p = ws_fopenfopen(path, "r");
1782 | }
1783 |
1784 | static void
1785 | end_ethent(void)
1786 | {
1787 | if (eth_p) {
1788 | fclose(eth_p);
1789 | eth_p = NULL((void*)0);
1790 | }
1791 | }
1792 |
1793 | static ether_t *
1794 | get_ethent(unsigned int *mask, const bool_Bool accept_mask)
1795 | {
1796 |
1797 | static ether_t eth;
1798 | char buf[MAX_LINELEN1024];
1799 |
1800 | if (eth_p == NULL((void*)0))
1801 | return NULL((void*)0);
1802 |
1803 | while (fgetline(buf, sizeof(buf), eth_p) >= 0) {
1804 | if (parse_ether_line(buf, &eth, mask, accept_mask) == 0) {
1805 | return &eth;
1806 | }
1807 | }
1808 |
1809 | return NULL((void*)0);
1810 |
1811 | } /* get_ethent */
1812 |
1813 | static hashmanuf_t *
1814 | manuf_hash_new_entry(const uint8_t *addr, const char* name, const char* longname)
1815 | {
1816 | unsigned manuf_key;
1817 | hashmanuf_t *manuf_value;
1818 | char *endp;
1819 |
1820 | /* manuf needs only the 3 most significant octets of the ethernet address */
1821 | manuf_key = (addr[0] << 16) + (addr[1] << 8) + addr[2];
1822 | manuf_value = wmem_new(addr_resolv_scope, hashmanuf_t)((hashmanuf_t*)wmem_alloc((addr_resolv_scope), sizeof(hashmanuf_t )));
1823 |
1824 | memcpy(manuf_value->addr, addr, 3);
1825 | if (name != NULL((void*)0)) {
1826 | (void) g_strlcpy(manuf_value->resolved_name, name, MAXNAMELEN64);
1827 | manuf_value->flags = NAME_RESOLVED(1U<<1);
1828 | if (longname != NULL((void*)0)) {
1829 | (void) g_strlcpy(manuf_value->resolved_longname, longname, MAXNAMELEN64);
1830 | }
1831 | else {
1832 | (void) g_strlcpy(manuf_value->resolved_longname, name, MAXNAMELEN64);
1833 | }
1834 | }
1835 | else {
1836 | manuf_value->flags = 0;
1837 | manuf_value->resolved_name[0] = '\0';
1838 | manuf_value->resolved_longname[0] = '\0';
1839 | }
1840 | /* Values returned by bytes_to_hexstr_punct() are *not* null-terminated */
1841 | endp = bytes_to_hexstr_punct(manuf_value->hexaddr, addr, sizeof(manuf_value->addr), ':');
1842 | *endp = '\0';
1843 |
1844 | wmem_map_insert(manuf_hashtable, GUINT_TO_POINTER(manuf_key)((gpointer) (gulong) (manuf_key)), manuf_value);
1845 | return manuf_value;
1846 | }
1847 |
1848 | static hashwka_t*
1849 | wka_hash_new_entry(const uint8_t *addr, char* name)
1850 | {
1851 | uint8_t *wka_key;
1852 | hashwka_t *wka_value;
1853 |
1854 | wka_key = (uint8_t *)wmem_alloc(addr_resolv_scope, 6);
1855 | memcpy(wka_key, addr, 6);
1856 |
1857 | wka_value = (hashwka_t*)wmem_new(addr_resolv_scope, hashwka_t)((hashwka_t*)wmem_alloc((addr_resolv_scope), sizeof(hashwka_t )));
1858 | wka_value->flags = NAME_RESOLVED(1U<<1);
1859 | wka_value->name = wmem_strdup(addr_resolv_scope, name);
1860 |
1861 | wmem_map_insert(wka_hashtable, wka_key, wka_value);
1862 | return wka_value;
1863 | }
1864 |
1865 | static void
1866 | add_manuf_name(const uint8_t *addr, unsigned int mask, char *name, char *longname)
1867 | {
1868 | switch (mask)
1869 | {
1870 | case 0:
1871 | {
1872 | /* This is a manufacturer ID; add it to the manufacturer ID hash table */
1873 | hashmanuf_t *entry = manuf_hash_new_entry(addr, name, longname);
1874 | entry->flags |= STATIC_HOSTNAME(1U<<3);
1875 | break;
1876 | }
1877 | case 48:
1878 | {
1879 | /* This is a well-known MAC address; add it to the Ethernet hash table */
1880 | add_eth_name(addr, name, true1);
1881 | break;
1882 | }
1883 | default:
1884 | {
1885 | /* This is a range of well-known addresses; add it to the well-known-address table */
1886 | hashwka_t *entry = wka_hash_new_entry(addr, name);
1887 | entry->flags |= STATIC_HOSTNAME(1U<<3);
1888 | break;
1889 | }
1890 | }
1891 | } /* add_manuf_name */
1892 |
1893 | /* XXX: manuf_name_lookup returns a hashmanuf_t*, which cannot hold a 28 or
1894 | * 36 bit MA-M or MA-S. So it returns those as unresolved. For EUI-48 and
1895 | * EUI-64, MA-M and MA-S should be checked for separately in the global
1896 | * tables.
1897 | *
1898 | * XXX - size_t is used only in a ws_return_val_if() that checks
1899 | * whether the argument has at least 3 bytes; that's done only if
1900 | * assertions are enabled, so it's used only if assertions are
1901 | * enabled. This means that, if assertions aren't enabled, a
1902 | * warning that the argument is unused will be issued by at least
1903 | * some compilers, so we mark it as unused. Should we do that
1904 | * check unconditionally, and just emit a warning if assertions
1905 | * are enabled?
1906 | */
1907 | static hashmanuf_t *
1908 | manuf_name_lookup(const uint8_t *addr, size_t size _U___attribute__((unused)))
1909 | {
1910 | uint32_t manuf_key;
1911 | uint8_t oct;
1912 | hashmanuf_t *manuf_value;
1913 |
1914 | ws_return_val_if(size < 3, NULL)do { if (1 && (size < 3)) { ws_log_full("InvalidArg" , LOG_LEVEL_WARNING, "epan/addr_resolv.c", 1914, __func__, "invalid argument: %s" , "size < 3"); return (((void*)0)); } } while (0);
1915 |
1916 | /* manuf needs only the 3 most significant octets of the ethernet address */
1917 | manuf_key = addr[0];
1918 | manuf_key = manuf_key<<8;
1919 | oct = addr[1];
1920 | manuf_key = manuf_key | oct;
1921 | manuf_key = manuf_key<<8;
1922 | oct = addr[2];
1923 | manuf_key = manuf_key | oct;
1924 |
1925 |
1926 | /* first try to find a "perfect match" */
1927 | manuf_value = (hashmanuf_t*)wmem_map_lookup(manuf_hashtable, GUINT_TO_POINTER(manuf_key)((gpointer) (gulong) (manuf_key)));
1928 | if (manuf_value != NULL((void*)0)) {
1929 | manuf_value->flags |= TRIED_RESOLVE_ADDRESS(1U<<0);
1930 | return manuf_value;
1931 | }
1932 |
1933 | /* Mask out the broadcast/multicast flag but not the locally
1934 | * administered flag as locally administered means: not assigned
1935 | * by the IEEE but the local administrator instead.
1936 | * 0x01 multicast / broadcast bit
1937 | * 0x02 locally administered bit */
1938 | if ((manuf_key & 0x00010000) != 0) {
1939 | manuf_key &= 0x00FEFFFF;
1940 | manuf_value = (hashmanuf_t*)wmem_map_lookup(manuf_hashtable, GUINT_TO_POINTER(manuf_key)((gpointer) (gulong) (manuf_key)));
1941 | if (manuf_value != NULL((void*)0)) {
1942 | manuf_value->flags |= TRIED_RESOLVE_ADDRESS(1U<<0);
1943 | return manuf_value;
1944 | }
1945 | }
1946 |
1947 | /* Try the global manuf tables. */
1948 | const char *short_name, *long_name;
1949 | /* We can't insert a 28 or 36 bit entry into the used hash table. */
1950 | short_name = ws_manuf_lookup_oui24(addr, &long_name);
1951 | if (short_name != NULL((void*)0)) {
1952 | /* Found it */
1953 | manuf_value = manuf_hash_new_entry(addr, short_name, long_name);
1954 | } else {
1955 | /* Add the address as a hex string */
1956 | manuf_value = manuf_hash_new_entry(addr, NULL((void*)0), NULL((void*)0));
1957 | }
1958 |
1959 | manuf_value->flags |= TRIED_RESOLVE_ADDRESS(1U<<0);
1960 | return manuf_value;
1961 |
1962 | } /* manuf_name_lookup */
1963 |
1964 | static char *
1965 | wka_name_lookup(const uint8_t *addr, const unsigned int mask)
1966 | {
1967 | uint8_t masked_addr[6];
1968 | unsigned num;
1969 | int i;
1970 | hashwka_t *value;
1971 |
1972 | if (wka_hashtable == NULL((void*)0)) {
1973 | return NULL((void*)0);
1974 | }
1975 | /* Get the part of the address covered by the mask. */
1976 | for (i = 0, num = mask; num >= 8; i++, num -= 8)
1977 | masked_addr[i] = addr[i]; /* copy octets entirely covered by the mask */
1978 | /* Mask out the first masked octet */
1979 | masked_addr[i] = addr[i] & (0xFF << (8 - num));
1980 | i++;
1981 | /* Zero out completely-masked-out octets */
1982 | for (; i < 6; i++)
1983 | masked_addr[i] = 0;
1984 |
1985 | value = (hashwka_t*)wmem_map_lookup(wka_hashtable, masked_addr);
1986 |
1987 | if (value) {
1988 | value->flags |= TRIED_RESOLVE_ADDRESS(1U<<0);
1989 | return value->name;
1990 | }
1991 |
1992 | return NULL((void*)0);
1993 |
1994 | } /* wka_name_lookup */
1995 |
1996 | unsigned get_hash_ether_status(hashether_t* ether)
1997 | {
1998 | return ether->flags;
1999 | }
2000 |
2001 | bool_Bool get_hash_ether_used(hashether_t* ether)
2002 | {
2003 | return ((ether->flags & TRIED_OR_RESOLVED_MASK((1U<<0) | (1U<<1))) == TRIED_OR_RESOLVED_MASK((1U<<0) | (1U<<1)));
2004 | }
2005 |
2006 | char* get_hash_ether_hexaddr(hashether_t* ether)
2007 | {
2008 | return ether->hexaddr;
2009 | }
2010 |
2011 | char* get_hash_ether_resolved_name(hashether_t* ether)
2012 | {
2013 | return ether->resolved_name;
2014 | }
2015 |
2016 | bool_Bool get_hash_wka_used(hashwka_t* wka)
2017 | {
2018 | return ((wka->flags & TRIED_OR_RESOLVED_MASK((1U<<0) | (1U<<1))) == TRIED_OR_RESOLVED_MASK((1U<<0) | (1U<<1)));
2019 | }
2020 |
2021 | char* get_hash_wka_resolved_name(hashwka_t* wka)
2022 | {
2023 | return wka->name;
2024 | }
2025 |
2026 | static unsigned
2027 | eth_addr_hash(const void *key)
2028 | {
2029 | return wmem_strong_hash((const uint8_t *)key, 6);
2030 | }
2031 |
2032 | static gboolean
2033 | eth_addr_cmp(const void *a, const void *b)
2034 | {
2035 | return (memcmp(a, b, 6) == 0);
2036 | }
2037 |
2038 | static unsigned
2039 | eui64_addr_hash(const void *key)
2040 | {
2041 | return wmem_strong_hash((const uint8_t *)key, EUI64_ADDR_LEN8);
2042 | }
2043 |
2044 | static gboolean
2045 | eui64_addr_cmp(const void *a, const void *b)
2046 | {
2047 | return (memcmp(a, b, EUI64_ADDR_LEN8) == 0);
2048 | }
2049 |
2050 | static void
2051 | initialize_ethers(const char* app_env_var_prefix)
2052 | {
2053 | ether_t *eth;
2054 | unsigned mask = 0;
2055 |
2056 | /* hash table initialization */
2057 | ws_assert(wka_hashtable == NULL)do { if ((1) && !(wka_hashtable == ((void*)0))) ws_log_fatal_full ("", LOG_LEVEL_ERROR, "epan/addr_resolv.c", 2057, __func__, "assertion failed: %s" , "wka_hashtable == ((void*)0)"); } while (0);
2058 | wka_hashtable = wmem_map_new(addr_resolv_scope, eth_addr_hash, eth_addr_cmp);
2059 | ws_assert(manuf_hashtable == NULL)do { if ((1) && !(manuf_hashtable == ((void*)0))) ws_log_fatal_full ("", LOG_LEVEL_ERROR, "epan/addr_resolv.c", 2059, __func__, "assertion failed: %s" , "manuf_hashtable == ((void*)0)"); } while (0);
2060 | manuf_hashtable = wmem_map_new(addr_resolv_scope, g_direct_hash, g_direct_equal);
2061 | ws_assert(eth_hashtable == NULL)do { if ((1) && !(eth_hashtable == ((void*)0))) ws_log_fatal_full ("", LOG_LEVEL_ERROR, "epan/addr_resolv.c", 2061, __func__, "assertion failed: %s" , "eth_hashtable == ((void*)0)"); } while (0);
2062 | eth_hashtable = wmem_map_new(addr_resolv_scope, eth_addr_hash, eth_addr_cmp);
2063 | ws_assert(eui64_hashtable == NULL)do { if ((1) && !(eui64_hashtable == ((void*)0))) ws_log_fatal_full ("", LOG_LEVEL_ERROR, "epan/addr_resolv.c", 2063, __func__, "assertion failed: %s" , "eui64_hashtable == ((void*)0)"); } while (0);
2064 | eui64_hashtable = wmem_map_new(addr_resolv_scope, eui64_addr_hash, eui64_addr_cmp);
2065 |
2066 | /* Compute the pathname of the ethers file. */
2067 | if (g_ethers_path == NULL((void*)0)) {
2068 | g_ethers_path = g_build_filename(get_systemfile_dir(app_env_var_prefix), ENAME_ETHERS"ethers", NULL((void*)0));
2069 | }
2070 |
2071 | /* Compute the pathname of the personal ethers file. */
2072 | if (g_pethers_path == NULL((void*)0)) {
2073 | /* Check profile directory before personal configuration */
2074 | g_pethers_path = get_persconffile_path(ENAME_ETHERS"ethers", true1, app_env_var_prefix);
2075 | if (!file_exists(g_pethers_path)) {
2076 | g_free(g_pethers_path);
2077 | g_pethers_path = get_persconffile_path(ENAME_ETHERS"ethers", false0, app_env_var_prefix);
2078 | }
2079 | }
2080 |
2081 | /* Compute the pathname of the global manuf file */
2082 | if (g_manuf_path == NULL((void*)0))
2083 | g_manuf_path = get_datafile_path(ENAME_MANUF"manuf", app_env_var_prefix);
2084 | /* Read it and initialize the hash table */
2085 | if (file_exists(g_manuf_path)) {
2086 | set_ethent(g_manuf_path);
2087 | while ((eth = get_ethent(&mask, true1))) {
2088 | add_manuf_name(eth->addr, mask, eth->name, eth->longname);
2089 | }
2090 | end_ethent();
2091 | }
2092 |
2093 | /* Compute the pathname of the personal manuf file */
2094 | if (g_pmanuf_path == NULL((void*)0)) {
2095 | /* Check profile directory before personal configuration */
2096 | g_pmanuf_path = get_persconffile_path(ENAME_MANUF"manuf", true1, app_env_var_prefix);
2097 | if (!file_exists(g_pmanuf_path)) {
2098 | g_free(g_pmanuf_path);
2099 | g_pmanuf_path = get_persconffile_path(ENAME_MANUF"manuf", false0, app_env_var_prefix);
2100 | }
2101 | }
2102 | /* Read it and initialize the hash table */
2103 | if (file_exists(g_pmanuf_path)) {
2104 | set_ethent(g_pmanuf_path);
2105 | while ((eth = get_ethent(&mask, true1))) {
2106 | add_manuf_name(eth->addr, mask, eth->name, eth->longname);
2107 | }
2108 | end_ethent();
2109 | }
2110 |
2111 | /* Compute the pathname of the wka file */
2112 | if (g_wka_path == NULL((void*)0))
2113 | g_wka_path = get_datafile_path(ENAME_WKA"wka", app_env_var_prefix);
2114 |
2115 | /* Read it and initialize the hash table */
2116 | set_ethent(g_wka_path);
2117 | while ((eth = get_ethent(&mask, true1))) {
2118 | add_manuf_name(eth->addr, mask, eth->name, eth->longname);
2119 | }
2120 | end_ethent();
2121 |
2122 | /* Look at the ethers files last. These are set as static names,
2123 | * so they override earlier entries, and the ones we read last
2124 | * take precedence. Order of precedence is personal ethers file,
2125 | * global ethers file, wka file, personal manuf file, global manuf
2126 | * file, and then non-static sources like ARP Eth -> IP hostname
2127 | * discovery (if enabled), NRB entries (if wiretap adds support for
2128 | * EUI-48 in NRBs), etc.
2129 | * XXX: What _is_ the proper order of precedence, and should it
2130 | * be configurable? (cf. #18075) */
2131 | set_ethent(g_ethers_path);
2132 | while ((eth = get_ethent(&mask, false0))) {
2133 | if (mask == 48) {
2134 | add_eth_name(eth->addr, eth->name, true1);
2135 | } else if (mask == 64) {
2136 | add_eui64_name(eth->addr, eth->name, true1);
2137 | }
2138 | }
2139 | end_ethent();
2140 |
2141 | if (file_exists(g_pethers_path)) {
2142 | set_ethent(g_pethers_path);
2143 | while ((eth = get_ethent(&mask, false0))) {
2144 | if (mask == 48) {
2145 | add_eth_name(eth->addr, eth->name, true1);
2146 | } else if (mask == 64) {
2147 | add_eui64_name(eth->addr, eth->name, true1);
2148 | }
2149 | }
2150 | end_ethent();
2151 | }
2152 |
2153 | } /* initialize_ethers */
2154 |
2155 | static void
2156 | ethers_cleanup(void)
2157 | {
2158 | wka_hashtable = NULL((void*)0);
2159 | manuf_hashtable = NULL((void*)0);
2160 | eth_hashtable = NULL((void*)0);
2161 | eui64_hashtable = NULL((void*)0);
2162 | g_free(g_ethers_path);
2163 | g_ethers_path = NULL((void*)0);
2164 | g_free(g_pethers_path);
2165 | g_pethers_path = NULL((void*)0);
2166 | g_free(g_manuf_path);
2167 | g_manuf_path = NULL((void*)0);
2168 | g_free(g_pmanuf_path);
2169 | g_pmanuf_path = NULL((void*)0);
2170 | g_free(g_wka_path);
2171 | g_wka_path = NULL((void*)0);
2172 | }
2173 |
2174 | static void
2175 | eth_resolved_name_fill(hashether_t *tp, const char *name, unsigned mask, const uint8_t *addr)
2176 | {
2177 | switch (mask) {
2178 | case 24:
2179 | snprintf(tp->resolved_name, MAXNAMELEN64, "%s_%02x:%02x:%02x",
2180 | name, addr[3], addr[4], addr[5]);
2181 | break;
2182 | case 28:
2183 | snprintf(tp->resolved_name, MAXNAMELEN64, "%s_%01x:%02x:%02x",
2184 | name, addr[3] & 0x0F, addr[4], addr[5]);
2185 | break;
2186 | case 36:
2187 | snprintf(tp->resolved_name, MAXNAMELEN64, "%s_%01x:%02x",
2188 | name, addr[4] & 0x0F, addr[5]);
2189 | break;
2190 | default: // Future-proof generic algorithm
2191 | {
2192 | unsigned bytes = mask / 8;
2193 | unsigned bitmask = mask % 8;
2194 |
2195 | int pos = snprintf(tp->resolved_name, MAXNAMELEN64, "%s", name);
2196 | if (pos >= MAXNAMELEN64) return;
2197 |
2198 | if (bytes < 6) {
2199 | pos += snprintf(tp->resolved_name + pos, MAXNAMELEN64 - pos,
2200 | bitmask >= 4 ? "_%01x" : "_%02x",
2201 | addr[bytes] & (0xFF >> bitmask));
2202 | bytes++;
2203 | }
2204 |
2205 | while (bytes < 6) {
2206 | if (pos >= MAXNAMELEN64) return;
2207 | pos += snprintf(tp->resolved_name + pos, MAXNAMELEN64 - pos, ":%02x",
2208 | addr[bytes]);
2209 | bytes++;
2210 | }
2211 | }
2212 | }
2213 | }
2214 |
2215 | /* Resolve ethernet address */
2216 | static hashether_t *
2217 | eth_addr_resolve(hashether_t *tp) {
2218 | hashmanuf_t *manuf_value;
2219 | const uint8_t *addr = tp->addr;
2220 | size_t addr_size = sizeof(tp->addr);
2221 |
2222 | if (!(tp->flags & NAME_RESOLVED(1U<<1))) {
2223 | unsigned mask;
2224 | char *name;
2225 | address ether_addr;
2226 |
2227 | /* Unknown name. Try looking for it in the well-known-address
2228 | tables for well-known address ranges smaller than 2^24. */
2229 | mask = 7;
2230 | do {
2231 | /* Only the topmost 5 bytes participate fully */
2232 | if ((name = wka_name_lookup(addr, mask+40)) != NULL((void*)0)) {
2233 | snprintf(tp->resolved_name, MAXNAMELEN64, "%s_%02x",
2234 | name, addr[5] & (0xFF >> mask));
2235 | tp->flags |= NAME_RESOLVED(1U<<1) | NAME_RESOLVED_PREFIX(1U<<4);
2236 | return tp;
2237 | }
2238 | } while (mask--);
2239 |
2240 | mask = 7;
2241 | do {
2242 | /* Only the topmost 4 bytes participate fully */
2243 | if ((name = wka_name_lookup(addr, mask+32)) != NULL((void*)0)) {
2244 | snprintf(tp->resolved_name, MAXNAMELEN64, "%s_%02x:%02x",
2245 | name, addr[4] & (0xFF >> mask), addr[5]);
2246 | tp->flags |= NAME_RESOLVED(1U<<1) | NAME_RESOLVED_PREFIX(1U<<4);
2247 | return tp;
2248 | }
2249 | } while (mask--);
2250 |
2251 | mask = 7;
2252 | do {
2253 | /* Only the topmost 3 bytes participate fully */
2254 | if ((name = wka_name_lookup(addr, mask+24)) != NULL((void*)0)) {
2255 | snprintf(tp->resolved_name, MAXNAMELEN64, "%s_%02x:%02x:%02x",
2256 | name, addr[3] & (0xFF >> mask), addr[4], addr[5]);
2257 | tp->flags |= NAME_RESOLVED(1U<<1) | NAME_RESOLVED_PREFIX(1U<<4);
2258 | return tp;
2259 | }
2260 | } while (mask--);
2261 |
2262 | /* Now try looking in the manufacturer table. */
2263 | manuf_value = manuf_name_lookup(addr, addr_size);
2264 | if ((manuf_value != NULL((void*)0)) && ((manuf_value->flags & NAME_RESOLVED(1U<<1)) == NAME_RESOLVED(1U<<1))) {
2265 | snprintf(tp->resolved_name, MAXNAMELEN64, "%.*s_%02x:%02x:%02x",
2266 | MAXNAMELEN64 - 10, manuf_value->resolved_name, addr[3], addr[4], addr[5]);
2267 | tp->flags |= NAME_RESOLVED(1U<<1) | NAME_RESOLVED_PREFIX(1U<<4);
2268 | return tp;
2269 | }
2270 |
2271 | /* Now try looking for it in the well-known-address
2272 | tables for well-known address ranges larger than 2^24. */
2273 | mask = 7;
2274 | do {
2275 | /* Only the topmost 2 bytes participate fully */
2276 | if ((name = wka_name_lookup(addr, mask+16)) != NULL((void*)0)) {
2277 | snprintf(tp->resolved_name, MAXNAMELEN64, "%s_%02x:%02x:%02x:%02x",
2278 | name, addr[2] & (0xFF >> mask), addr[3], addr[4],
2279 | addr[5]);
2280 | tp->flags |= NAME_RESOLVED(1U<<1) | NAME_RESOLVED_PREFIX(1U<<4);
2281 | return tp;
2282 | }
2283 | } while (mask--);
2284 |
2285 | mask = 7;
2286 | do {
2287 | /* Only the topmost byte participates fully */
2288 | if ((name = wka_name_lookup(addr, mask+8)) != NULL((void*)0)) {
2289 | snprintf(tp->resolved_name, MAXNAMELEN64, "%s_%02x:%02x:%02x:%02x:%02x",
2290 | name, addr[1] & (0xFF >> mask), addr[2], addr[3],
2291 | addr[4], addr[5]);
2292 | tp->flags |= NAME_RESOLVED(1U<<1) | NAME_RESOLVED_PREFIX(1U<<4);
2293 | return tp;
2294 | }
2295 | } while (mask--);
2296 |
2297 | mask = 7;
2298 | do {
2299 | /* Not even the topmost byte participates fully */
2300 | if ((name = wka_name_lookup(addr, mask)) != NULL((void*)0)) {
2301 | snprintf(tp->resolved_name, MAXNAMELEN64, "%s_%02x:%02x:%02x:%02x:%02x:%02x",
2302 | name, addr[0] & (0xFF >> mask), addr[1], addr[2],
2303 | addr[3], addr[4], addr[5]);
2304 | tp->flags |= NAME_RESOLVED(1U<<1) | NAME_RESOLVED_PREFIX(1U<<4);
2305 | return tp;
2306 | }
2307 | } while (--mask); /* Work down to the last bit */
2308 |
2309 | /* Now try looking in the global manuf data for a MA-M or MA-S
2310 | * match. We do this last so that the other files override this
2311 | * result.
2312 | */
2313 | const char *short_name, *long_name;
2314 | short_name = ws_manuf_lookup(addr, &long_name, &mask);
2315 | if (short_name != NULL((void*)0)) {
2316 | if (mask == 24) {
2317 | /* This shouldn't happen as it should be handled above,
2318 | * but it doesn't hurt.
2319 | */
2320 | manuf_hash_new_entry(addr, short_name, long_name);
2321 | }
2322 | eth_resolved_name_fill(tp, short_name, mask, addr);
2323 | tp->flags |= NAME_RESOLVED(1U<<1) | NAME_RESOLVED_PREFIX(1U<<4);
2324 | return tp;
2325 | }
2326 | /* No match whatsoever. */
2327 | set_address(&ether_addr, AT_ETHER, 6, addr);
2328 | address_to_str_buf(&ether_addr, tp->resolved_name, MAXNAMELEN64);
2329 | return tp;
2330 | }
2331 | return tp;
2332 | } /* eth_addr_resolve */
2333 |
2334 | static hashether_t *
2335 | eth_hash_new_entry(const uint8_t *addr, const bool_Bool resolve)
2336 | {
2337 | hashether_t *tp;
2338 | char *endp;
2339 |
2340 | tp = wmem_new(addr_resolv_scope, hashether_t)((hashether_t*)wmem_alloc((addr_resolv_scope), sizeof(hashether_t )));
2341 | memcpy(tp->addr, addr, sizeof(tp->addr));
2342 | tp->flags = 0;
2343 | /* Values returned by bytes_to_hexstr_punct() are *not* null-terminated */
2344 | endp = bytes_to_hexstr_punct(tp->hexaddr, addr, sizeof(tp->addr), ':');
2345 | *endp = '\0';
2346 | tp->resolved_name[0] = '\0';
2347 |
2348 | if (resolve)
2349 | eth_addr_resolve(tp);
2350 |
2351 | wmem_map_insert(eth_hashtable, tp->addr, tp);
2352 |
2353 | return tp;
2354 | } /* eth_hash_new_entry */
2355 |
2356 | static hashether_t *
2357 | add_eth_name(const uint8_t *addr, const char *name, bool_Bool static_entry)
2358 | {
2359 | hashether_t *tp;
2360 |
2361 | tp = (hashether_t *)wmem_map_lookup(eth_hashtable, addr);
2362 |
2363 | if (tp == NULL((void*)0)) {
2364 | tp = eth_hash_new_entry(addr, false0);
2365 | }
2366 |
2367 | if (strcmp(tp->resolved_name, name) != 0 && (static_entry || !(tp->flags & STATIC_HOSTNAME(1U<<3)))) {
2368 | (void) g_strlcpy(tp->resolved_name, name, MAXNAMELEN64);
2369 | tp->flags |= NAME_RESOLVED(1U<<1);
2370 | if (static_entry) {
2371 | tp->flags |= STATIC_HOSTNAME(1U<<3);
2372 | }
2373 | new_resolved_objects = true1;
2374 | }
2375 |
2376 | return tp;
2377 | } /* add_eth_name */
2378 |
2379 | static hashether_t *
2380 | eth_name_lookup(const uint8_t *addr, const bool_Bool resolve)
2381 | {
2382 | hashether_t *tp;
2383 |
2384 | tp = (hashether_t *)wmem_map_lookup(eth_hashtable, addr);
2385 |
2386 | if (tp == NULL((void*)0)) {
2387 | tp = eth_hash_new_entry(addr, resolve);
2388 | } else {
2389 | if (resolve && !(tp->flags & TRIED_OR_RESOLVED_MASK((1U<<0) | (1U<<1)))) {
2390 | eth_addr_resolve(tp); /* Found but needs to be resolved */
2391 | }
2392 | }
2393 | if (resolve) {
2394 | tp->flags |= TRIED_RESOLVE_ADDRESS(1U<<0);
2395 | }
2396 |
2397 | return tp;
2398 |
2399 | } /* eth_name_lookup */
2400 |
2401 | static void
2402 | eui64_resolved_name_fill(hasheui64_t *tp, const char *name, unsigned mask, const uint8_t *addr)
2403 | {
2404 | switch (mask) {
2405 | case 24:
2406 | snprintf(tp->resolved_name, MAXNAMELEN64, "%s_%02x:%02x:%02x:%02x:%02x",
2407 | name, addr[3], addr[4], addr[5], addr[6], addr[7]);
2408 | break;
2409 | case 28:
2410 | snprintf(tp->resolved_name, MAXNAMELEN64, "%s_%01x:%02x:%02x:%02x:%02x",
2411 | name, addr[3] & 0x0F, addr[4], addr[5], addr[6], addr[7]);
2412 | break;
2413 | case 36:
2414 | snprintf(tp->resolved_name, MAXNAMELEN64, "%s_%01x:%02x:%02x:%02x",
2415 | name, addr[4] & 0x0F, addr[5], addr[6], addr[7]);
2416 | break;
2417 | default: // Future-proof generic algorithm
2418 | {
2419 | unsigned bytes = mask / 8;
2420 | unsigned bitmask = mask % 8;
2421 |
2422 | int pos = snprintf(tp->resolved_name, MAXNAMELEN64, "%s", name);
2423 | if (pos >= MAXNAMELEN64) return;
2424 |
2425 | if (bytes < EUI64_ADDR_LEN8) {
2426 | pos += snprintf(tp->resolved_name + pos, MAXNAMELEN64 - pos,
2427 | bitmask >= 4 ? "_%01x" : "_%02x",
2428 | addr[bytes] & (0xFF >> bitmask));
2429 | bytes++;
2430 | }
2431 |
2432 | while (bytes < EUI64_ADDR_LEN8) {
2433 | if (pos >= MAXNAMELEN64) return;
2434 | pos += snprintf(tp->resolved_name + pos, MAXNAMELEN64 - pos, ":%02x",
2435 | addr[bytes]);
2436 | bytes++;
2437 | }
2438 | }
2439 | }
2440 | }
2441 |
2442 | /* Resolve EUI-64 address */
2443 | static hasheui64_t *
2444 | eui64_addr_resolve(hasheui64_t *tp)
2445 | {
2446 | hashmanuf_t *manuf_value;
2447 | const uint8_t *addr = tp->addr;
2448 | size_t addr_size = sizeof(tp->addr);
2449 |
2450 | if (!(tp->flags & NAME_RESOLVED(1U<<1))) {
2451 | unsigned mask;
2452 | address eui64_addr;
2453 | /* manuf_name_lookup returns a hashmanuf_t* that covers an entire /24,
2454 | * so we can't properly use it for MA-M and MA-S. We do want to check
2455 | * it first so it also covers the user-defined tables.
2456 | */
2457 | manuf_value = manuf_name_lookup(addr, addr_size);
2458 | if ((manuf_value != NULL((void*)0)) && ((manuf_value->flags & NAME_RESOLVED(1U<<1)) == NAME_RESOLVED(1U<<1))) {
2459 | snprintf(tp->resolved_name, MAXNAMELEN64, "%.*s_%02x:%02x:%02x:%02x:%02x",
2460 | MAXNAMELEN64 - 16, manuf_value->resolved_name, addr[3], addr[4], addr[5], addr[6], addr[7]);
2461 | tp->flags |= NAME_RESOLVED(1U<<1) | NAME_RESOLVED_PREFIX(1U<<4);
2462 | return tp;
2463 | }
2464 |
2465 | /* Now try looking in the global manuf data for a MA-M or MA-S
2466 | * match. We do this last so that the other files override this
2467 | * result.
2468 | */
2469 | const char *short_name, *long_name;
2470 | short_name = ws_manuf_lookup(addr, &long_name, &mask);
2471 | if (short_name != NULL((void*)0)) {
2472 | if (mask == 24) {
2473 | /* This shouldn't happen as it should be handled above,
2474 | * but it doesn't hurt.
2475 | */
2476 | manuf_hash_new_entry(addr, short_name, long_name);
2477 | }
2478 | eui64_resolved_name_fill(tp, short_name, mask, addr);
2479 | tp->flags |= NAME_RESOLVED(1U<<1) | NAME_RESOLVED_PREFIX(1U<<4);
2480 | return tp;
2481 | }
2482 | /* No match whatsoever. */
2483 | set_address(&eui64_addr, AT_EUI64, 8, addr);
2484 | address_to_str_buf(&eui64_addr, tp->resolved_name, MAXNAMELEN64);
2485 | return tp;
2486 | }
2487 |
2488 | return tp;
2489 | } /* eui64_addr_resolve */
2490 |
2491 | static hasheui64_t *
2492 | eui64_hash_new_entry(const uint8_t *addr, const bool_Bool resolve)
2493 | {
2494 | hasheui64_t *tp;
2495 | char *endp;
2496 |
2497 | tp = wmem_new(addr_resolv_scope, hasheui64_t)((hasheui64_t*)wmem_alloc((addr_resolv_scope), sizeof(hasheui64_t )));
2498 | memcpy(tp->addr, addr, sizeof(tp->addr));
2499 | tp->flags = 0;
2500 | /* Values returned by bytes_to_hexstr_punct() are *not* null-terminated */
2501 | endp = bytes_to_hexstr_punct(tp->hexaddr, addr, sizeof(tp->addr), ':');
2502 | *endp = '\0';
2503 | tp->resolved_name[0] = '\0';
2504 |
2505 | if (resolve)
2506 | eui64_addr_resolve(tp);
2507 |
2508 | wmem_map_insert(eui64_hashtable, tp->addr, tp);
2509 |
2510 | return tp;
2511 | } /* eui64_hash_new_entry */
2512 |
2513 | static hasheui64_t *
2514 | add_eui64_name(const uint8_t *addr, const char *name, bool_Bool static_entry)
2515 | {
2516 | hasheui64_t *tp;
2517 |
2518 | tp = (hasheui64_t *)wmem_map_lookup(eui64_hashtable, addr);
2519 |
2520 | if (tp == NULL((void*)0)) {
2521 | tp = eui64_hash_new_entry(addr, false0);
2522 | }
2523 |
2524 | if (strcmp(tp->resolved_name, name) != 0 && (static_entry || !(tp->flags & STATIC_HOSTNAME(1U<<3)))) {
2525 | (void) g_strlcpy(tp->resolved_name, name, MAXNAMELEN64);
2526 | tp->flags |= NAME_RESOLVED(1U<<1);
2527 | if (static_entry) {
2528 | tp->flags |= STATIC_HOSTNAME(1U<<3);
2529 | }
2530 | new_resolved_objects = true1;
2531 | }
2532 |
2533 | return tp;
2534 | } /* add_eui64_name */
2535 |
2536 | static hasheui64_t *
2537 | eui64_name_lookup(const uint8_t *addr, const bool_Bool resolve)
2538 | {
2539 | hasheui64_t *tp;
2540 |
2541 | tp = (hasheui64_t *)wmem_map_lookup(eui64_hashtable, addr);
2542 |
2543 | if (tp == NULL((void*)0)) {
2544 | tp = eui64_hash_new_entry(addr, resolve);
2545 | } else {
2546 | if (resolve && !(tp->flags & TRIED_OR_RESOLVED_MASK((1U<<0) | (1U<<1)))) {
2547 | eui64_addr_resolve(tp); /* Found but needs to be resolved */
2548 | }
2549 | }
2550 | if (resolve) {
2551 | tp->flags |= TRIED_RESOLVE_ADDRESS(1U<<0);
2552 | }
2553 |
2554 | return tp;
2555 |
2556 | } /* eui64_name_lookup */
2557 |
2558 | /* IPXNETS */
2559 | static int
2560 | parse_ipxnets_line(char *line, ipxnet_t *ipxnet)
2561 | {
2562 | /*
2563 | * We allow three address separators (':', '-', and '.'),
2564 | * as well as no separators
2565 | */
2566 |
2567 | char *cp;
2568 | uint32_t a, a0, a1, a2, a3;
2569 | bool_Bool found_single_number = false0;
2570 |
2571 | if ((cp = strchr(line, '#')))
2572 | *cp = '\0';
2573 |
2574 | if ((cp = strtok(line, " \t\n")) == NULL((void*)0))
2575 | return -1;
2576 |
2577 | /* Either fill a0,a1,a2,a3 and found_single_number is false,
2578 | * fill a and found_single_number is true,
2579 | * or return -1
2580 | */
2581 | if (sscanf(cp, "%x:%x:%x:%x", &a0, &a1, &a2, &a3) != 4) {
2582 | if (sscanf(cp, "%x-%x-%x-%x", &a0, &a1, &a2, &a3) != 4) {
2583 | if (sscanf(cp, "%x.%x.%x.%x", &a0, &a1, &a2, &a3) != 4) {
2584 | if (sscanf(cp, "%x", &a) == 1) {
2585 | found_single_number = true1;
2586 | }
2587 | else {
2588 | return -1;
2589 | }
2590 | }
2591 | }
2592 | }
2593 |
2594 | if ((cp = strtok(NULL((void*)0), " \t\n")) == NULL((void*)0))
2595 | return -1;
2596 |
2597 | if (found_single_number) {
2598 | ipxnet->addr = a;
2599 | }
2600 | else {
2601 | ipxnet->addr = (a0 << 24) | (a1 << 16) | (a2 << 8) | a3;
2602 | }
2603 |
2604 | (void) g_strlcpy(ipxnet->name, cp, MAXNAMELEN64);
2605 |
2606 | return 0;
2607 |
2608 | } /* parse_ipxnets_line */
2609 |
2610 | static FILE *ipxnet_p;
2611 |
2612 | static void
2613 | set_ipxnetent(char *path)
2614 | {
2615 | if (ipxnet_p)
2616 | rewind(ipxnet_p);
2617 | else
2618 | ipxnet_p = ws_fopenfopen(path, "r");
2619 | }
2620 |
2621 | static void
2622 | end_ipxnetent(void)
2623 | {
2624 | if (ipxnet_p) {
2625 | fclose(ipxnet_p);
2626 | ipxnet_p = NULL((void*)0);
2627 | }
2628 | }
2629 |
2630 | static ipxnet_t *
2631 | get_ipxnetent(void)
2632 | {
2633 |
2634 | static ipxnet_t ipxnet;
2635 | char buf[MAX_LINELEN1024];
2636 |
2637 | if (ipxnet_p == NULL((void*)0))
2638 | return NULL((void*)0);
2639 |
2640 | while (fgetline(buf, sizeof(buf), ipxnet_p) >= 0) {
2641 | if (parse_ipxnets_line(buf, &ipxnet) == 0) {
2642 | return &ipxnet;
2643 | }
2644 | }
2645 |
2646 | return NULL((void*)0);
2647 |
2648 | } /* get_ipxnetent */
2649 |
2650 | static ipxnet_t *
2651 | get_ipxnetbyaddr(uint32_t addr)
2652 | {
2653 | ipxnet_t *ipxnet;
2654 |
2655 | set_ipxnetent(g_ipxnets_path);
2656 |
2657 | while (((ipxnet = get_ipxnetent()) != NULL((void*)0)) && (addr != ipxnet->addr) ) ;
2658 |
2659 | if (ipxnet == NULL((void*)0)) {
2660 | end_ipxnetent();
2661 |
2662 | set_ipxnetent(g_pipxnets_path);
2663 |
2664 | while (((ipxnet = get_ipxnetent()) != NULL((void*)0)) && (addr != ipxnet->addr) )
2665 | ;
2666 |
2667 | end_ipxnetent();
2668 | }
2669 |
2670 | return ipxnet;
2671 |
2672 | } /* get_ipxnetbyaddr */
2673 |
2674 | static void
2675 | initialize_ipxnets(const char* app_env_var_prefix)
2676 | {
2677 | /* Compute the pathname of the ipxnets file.
2678 | *
2679 | * XXX - is there a notion of an "ipxnets file" in any flavor of
2680 | * UNIX, or with any add-on Netware package for UNIX? If not,
2681 | * should the UNIX version of the ipxnets file be in the datafile
2682 | * directory as well?
2683 | */
2684 | if (g_ipxnets_path == NULL((void*)0)) {
2685 | g_ipxnets_path = wmem_strdup_printf(addr_resolv_scope, "%s" G_DIR_SEPARATOR_S"/" "%s",
2686 | get_systemfile_dir(app_env_var_prefix), ENAME_IPXNETS"ipxnets");
2687 | }
2688 |
2689 | /* Set g_pipxnets_path here, but don't actually do anything
2690 | * with it. It's used in get_ipxnetbyaddr().
2691 | */
2692 | if (g_pipxnets_path == NULL((void*)0)) {
2693 | /* Check profile directory before personal configuration */
2694 | g_pipxnets_path = get_persconffile_path(ENAME_IPXNETS"ipxnets", true1, app_env_var_prefix);
2695 | if (!file_exists(g_pipxnets_path)) {
2696 | g_free(g_pipxnets_path);
2697 | g_pipxnets_path = get_persconffile_path(ENAME_IPXNETS"ipxnets", false0, app_env_var_prefix);
2698 | }
2699 | }
2700 |
2701 | } /* initialize_ipxnets */
2702 |
2703 | static void
2704 | ipx_name_lookup_cleanup(void)
2705 | {
2706 | g_ipxnets_path = NULL((void*)0);
2707 | g_free(g_pipxnets_path);
2708 | g_pipxnets_path = NULL((void*)0);
2709 | }
2710 |
2711 | static char *
2712 | ipxnet_name_lookup(wmem_allocator_t *allocator, const unsigned addr)
2713 | {
2714 | hashipxnet_t *tp;
2715 | ipxnet_t *ipxnet;
2716 |
2717 | tp = (hashipxnet_t *)wmem_map_lookup(ipxnet_hash_table, GUINT_TO_POINTER(addr)((gpointer) (gulong) (addr)));
2718 | if (tp == NULL((void*)0)) {
2719 | tp = wmem_new(addr_resolv_scope, hashipxnet_t)((hashipxnet_t*)wmem_alloc((addr_resolv_scope), sizeof(hashipxnet_t )));
2720 | wmem_map_insert(ipxnet_hash_table, GUINT_TO_POINTER(addr)((gpointer) (gulong) (addr)), tp);
2721 | } else {
2722 | return wmem_strdup(allocator, tp->name);
2723 | }
2724 |
2725 | /* fill in a new entry */
2726 |
2727 | tp->addr = addr;
2728 |
2729 | if ( (ipxnet = get_ipxnetbyaddr(addr)) == NULL((void*)0)) {
2730 | /* unknown name */
2731 | snprintf(tp->name, MAXNAMELEN64, "%X", addr);
2732 |
2733 | } else {
2734 | (void) g_strlcpy(tp->name, ipxnet->name, MAXNAMELEN64);
2735 | }
2736 |
2737 | return wmem_strdup(allocator, tp->name);
2738 |
2739 | } /* ipxnet_name_lookup */
2740 |
2741 | /* VLANS */
2742 | static int
2743 | parse_vlan_line(char *line, vlan_t *vlan)
2744 | {
2745 | char *cp;
2746 | uint16_t id;
2747 |
2748 | if ((cp = strchr(line, '#')))
2749 | *cp = '\0';
2750 |
2751 | if ((cp = strtok(line, " \t\n")) == NULL((void*)0))
2752 | return -1;
2753 |
2754 | if (sscanf(cp, "%" SCNu16"hu", &id) == 1) {
2755 | vlan->id = id;
2756 | }
2757 | else {
2758 | return -1;
2759 | }
2760 |
2761 | if ((cp = strtok(NULL((void*)0), "\t\n")) == NULL((void*)0))
2762 | return -1;
2763 |
2764 | (void) g_strlcpy(vlan->name, cp, MAXVLANNAMELEN128);
2765 |
2766 | return 0;
2767 |
2768 | } /* parse_vlan_line */
2769 |
2770 | static FILE *vlan_p;
2771 |
2772 | static void
2773 | set_vlanent(char *path)
2774 | {
2775 | if (vlan_p)
2776 | rewind(vlan_p);
2777 | else
2778 | vlan_p = ws_fopenfopen(path, "r");
2779 | }
2780 |
2781 | static void
2782 | end_vlanent(void)
2783 | {
2784 | if (vlan_p) {
2785 | fclose(vlan_p);
2786 | vlan_p = NULL((void*)0);
2787 | }
2788 | }
2789 |
2790 | static vlan_t *
2791 | get_vlanent(void)
2792 | {
2793 |
2794 | static vlan_t vlan;
2795 | char buf[MAX_LINELEN1024];
2796 |
2797 | if (vlan_p == NULL((void*)0))
2798 | return NULL((void*)0);
2799 |
2800 | while (fgetline(buf, sizeof(buf), vlan_p) >= 0) {
2801 | if (parse_vlan_line(buf, &vlan) == 0) {
2802 | return &vlan;
2803 | }
2804 | }
2805 |
2806 | return NULL((void*)0);
2807 |
2808 | } /* get_vlanent */
2809 |
2810 | static vlan_t *
2811 | get_vlannamebyid(uint16_t id)
2812 | {
2813 | vlan_t *vlan;
2814 |
2815 | set_vlanent(g_pvlan_path);
2816 |
2817 | while (((vlan = get_vlanent()) != NULL((void*)0)) && (id != vlan->id) ) ;
2818 |
2819 | if (vlan == NULL((void*)0)) {
2820 | end_vlanent();
2821 |
2822 | }
2823 |
2824 | return vlan;
2825 |
2826 | } /* get_vlannamebyid */
2827 |
2828 | static void
2829 | initialize_vlans(const char* app_env_var_prefix)
2830 | {
2831 | ws_assert(vlan_hash_table == NULL)do { if ((1) && !(vlan_hash_table == ((void*)0))) ws_log_fatal_full ("", LOG_LEVEL_ERROR, "epan/addr_resolv.c", 2831, __func__, "assertion failed: %s" , "vlan_hash_table == ((void*)0)"); } while (0);
2832 | vlan_hash_table = wmem_map_new(addr_resolv_scope, g_direct_hash, g_direct_equal);
2833 |
2834 | /* Set g_pvlan_path here, but don't actually do anything
2835 | * with it. It's used in get_vlannamebyid()
2836 | */
2837 | if (g_pvlan_path == NULL((void*)0)) {
2838 | /* Check profile directory before personal configuration */
2839 | g_pvlan_path = get_persconffile_path(ENAME_VLANS"vlans", true1, app_env_var_prefix);
2840 | if (!file_exists(g_pvlan_path)) {
2841 | g_free(g_pvlan_path);
2842 | g_pvlan_path = get_persconffile_path(ENAME_VLANS"vlans", false0, app_env_var_prefix);
2843 | }
2844 | }
2845 | } /* initialize_vlans */
2846 |
2847 | static void
2848 | vlan_name_lookup_cleanup(void)
2849 | {
2850 | end_vlanent();
2851 | vlan_hash_table = NULL((void*)0);
2852 | g_free(g_pvlan_path);
2853 | g_pvlan_path = NULL((void*)0);
2854 | }
2855 |
2856 | static const char *
2857 | vlan_name_lookup(const unsigned id)
2858 | {
2859 | hashvlan_t *tp;
2860 | vlan_t *vlan;
2861 |
2862 | tp = (hashvlan_t *)wmem_map_lookup(vlan_hash_table, GUINT_TO_POINTER(id)((gpointer) (gulong) (id)));
2863 | if (tp == NULL((void*)0)) {
2864 | tp = wmem_new(addr_resolv_scope, hashvlan_t)((hashvlan_t*)wmem_alloc((addr_resolv_scope), sizeof(hashvlan_t )));
2865 | wmem_map_insert(vlan_hash_table, GUINT_TO_POINTER(id)((gpointer) (gulong) (id)), tp);
2866 | } else {
2867 | return tp->name;
2868 | }
2869 |
2870 | /* fill in a new entry */
2871 |
2872 | tp->id = id;
2873 |
2874 | if ( (vlan = get_vlannamebyid(id)) == NULL((void*)0)) {
2875 | /* unknown name */
2876 | snprintf(tp->name, MAXVLANNAMELEN128, "<%u>", id);
2877 |
2878 | } else {
2879 | (void) g_strlcpy(tp->name, vlan->name, MAXVLANNAMELEN128);
2880 | }
2881 |
2882 | return tp->name;
2883 |
2884 | } /* vlan_name_lookup */
2885 | /* VLAN END */
2886 |
2887 | static bool_Bool
2888 | read_hosts_file (const char *hostspath, bool_Bool store_entries)
2889 | {
2890 | FILE *hf;
2891 | char line[MAX_LINELEN1024];
2892 | char *cp;
2893 | union {
2894 | uint32_t ip4_addr;
2895 | ws_in6_addr ip6_addr;
2896 | } host_addr;
2897 | bool_Bool is_ipv6, entry_found = false0;
2898 |
2899 | /*
2900 | * See the hosts(4) or hosts(5) man page for hosts file format
2901 | * (not available on all systems).
2902 | */
2903 | if ((hf = ws_fopenfopen(hostspath, "r")) == NULL((void*)0))
22 | ← | Taking false branch | →
2904 | return false0;
2905 |
2906 | while (fgetline(line, sizeof(line), hf) >= 0) {
23 | ← | Loop condition is false. Execution continues on line 2936 | →
2907 | if ((cp = strchr(line, '#')))
2908 | *cp = '\0';
2909 |
2910 | if ((cp = strtok(line, " \t")) == NULL((void*)0))
2911 | continue; /* no tokens in the line */
2912 |
2913 | if (ws_inet_pton6(cp, &host_addr.ip6_addr)) {
2914 | /* Valid IPv6 */
2915 | is_ipv6 = true1;
2916 | } else if (ws_inet_pton4(cp, &host_addr.ip4_addr)) {
2917 | /* Valid IPv4 */
2918 | is_ipv6 = false0;
2919 | } else {
2920 | continue;
2921 | }
2922 |
2923 | if ((cp = strtok(NULL((void*)0), " \t")) == NULL((void*)0))
2924 | continue; /* no host name */
2925 |
2926 | entry_found = true1;
2927 | if (store_entries) {
2928 | if (is_ipv6) {
2929 | add_ipv6_name(&host_addr.ip6_addr, cp, true1);
2930 | } else {
2931 | add_ipv4_name(host_addr.ip4_addr, cp, true1);
2932 | }
2933 | }
2934 | }
2935 |
2936 | fclose(hf);
24 | ← | Assuming that 'fclose' is successful; 'errno' becomes undefined after the call | →
2937 | return entry_found
24.1 | 'entry_found' is false
? true1 : false0;
25 | ← | '?' condition is false | →
2938 | } /* read_hosts_file */
2939 |
2940 | bool_Bool
2941 | add_hosts_file (const char *hosts_file)
2942 | {
2943 | bool_Bool found = false0;
2944 | unsigned i;
2945 |
2946 | if (!hosts_file)
2947 | return false0;
2948 |
2949 | if (!extra_hosts_files)
2950 | extra_hosts_files = g_ptr_array_new();
2951 |
2952 | for (i = 0; i < extra_hosts_files->len; i++) {
2953 | if (strcmp(hosts_file, (const char *) g_ptr_array_index(extra_hosts_files, i)((extra_hosts_files)->pdata)[i]) == 0)
2954 | found = true1;
2955 | }
2956 |
2957 | if (!found) {
2958 | g_ptr_array_add(extra_hosts_files, wmem_strdup(wmem_epan_scope(), hosts_file));
2959 | return read_hosts_file (hosts_file, false0);
2960 | }
2961 | return true1;
2962 | }
2963 |
2964 | bool_Bool
2965 | add_ip_name_from_string (const char *addr, const char *name)
2966 | {
2967 | union {
2968 | uint32_t ip4_addr;
2969 | ws_in6_addr ip6_addr;
2970 | } host_addr;
2971 | bool_Bool is_ipv6;
2972 | resolved_name_t *resolved_entry;
2973 |
2974 | if (ws_inet_pton6(addr, &host_addr.ip6_addr)) {
2975 | is_ipv6 = true1;
2976 | } else if (ws_inet_pton4(addr, &host_addr.ip4_addr)) {
2977 | is_ipv6 = false0;
2978 | } else {
2979 | return false0;
2980 | }
2981 |
2982 | if (is_ipv6) {
2983 | resolved_entry = (resolved_name_t*)wmem_map_lookup(manually_resolved_ipv6_list, &host_addr.ip6_addr);
2984 | if (resolved_entry)
2985 | {
2986 | // If we found a previous matching key (IP address), then just update the value (custom hostname);
2987 | (void) g_strlcpy(resolved_entry->name, name, MAXDNSNAMELEN256);
2988 | }
2989 | else
2990 | {
2991 | // Add a new mapping entry, if this IP address isn't already in the list.
2992 | ws_in6_addr* addr_key = wmem_new(wmem_epan_scope(), ws_in6_addr)((ws_in6_addr*)wmem_alloc((wmem_epan_scope()), sizeof(ws_in6_addr )));
2993 | memcpy(addr_key, &host_addr.ip6_addr, sizeof(ws_in6_addr));
2994 |
2995 | resolved_entry = wmem_new(wmem_epan_scope(), resolved_name_t)((resolved_name_t*)wmem_alloc((wmem_epan_scope()), sizeof(resolved_name_t )));
2996 | (void) g_strlcpy(resolved_entry->name, name, MAXDNSNAMELEN256);
2997 |
2998 | wmem_map_insert(manually_resolved_ipv6_list, addr_key, resolved_entry);
2999 | }
3000 | } else {
3001 | resolved_entry = (resolved_name_t*)wmem_map_lookup(manually_resolved_ipv4_list, GUINT_TO_POINTER(host_addr.ip4_addr)((gpointer) (gulong) (host_addr.ip4_addr)));
3002 | if (resolved_entry)
3003 | {
3004 | // If we found a previous matching key (IP address), then just update the value (custom hostname);
3005 | (void) g_strlcpy(resolved_entry->name, name, MAXDNSNAMELEN256);
3006 | }
3007 | else
3008 | {
3009 | // Add a new mapping entry, if this IP address isn't already in the list.
3010 | resolved_entry = wmem_new(wmem_epan_scope(), resolved_name_t)((resolved_name_t*)wmem_alloc((wmem_epan_scope()), sizeof(resolved_name_t )));
3011 | (void) g_strlcpy(resolved_entry->name, name, MAXDNSNAMELEN256);
3012 |
3013 | wmem_map_insert(manually_resolved_ipv4_list, GUINT_TO_POINTER(host_addr.ip4_addr)((gpointer) (gulong) (host_addr.ip4_addr)), resolved_entry);
3014 | }
3015 | }
3016 |
3017 | return true1;
3018 | } /* add_ip_name_from_string */
3019 |
3020 | extern resolved_name_t* get_edited_resolved_name(const char* addr)
3021 | {
3022 | uint32_t ip4_addr;
3023 | ws_in6_addr ip6_addr;
3024 | resolved_name_t* resolved_entry = NULL((void*)0);
3025 |
3026 | if (ws_inet_pton6(addr, &ip6_addr)) {
3027 | resolved_entry = (resolved_name_t*)wmem_map_lookup(manually_resolved_ipv6_list, &ip6_addr);
3028 | }
3029 | else if (ws_inet_pton4(addr, &ip4_addr)) {
3030 | resolved_entry = (resolved_name_t*)wmem_map_lookup(manually_resolved_ipv4_list, GUINT_TO_POINTER(ip4_addr)((gpointer) (gulong) (ip4_addr)));
3031 | }
3032 |
3033 | return resolved_entry;
3034 | }
3035 |
3036 | /*
3037 | * Add the resolved addresses that are in use to the list used to create the pcapng NRB
3038 | */
3039 | static void
3040 | ipv4_hash_table_resolved_to_list(void *key _U___attribute__((unused)), void *value, void *user_data)
3041 | {
3042 | addrinfo_lists_t *lists = (addrinfo_lists_t *)user_data;
3043 | hashipv4_t *ipv4_hash_table_entry = (hashipv4_t *)value;
3044 |
3045 | if ((ipv4_hash_table_entry->flags & USED_AND_RESOLVED_MASK((1U<<1) | (1U<<2))) == USED_AND_RESOLVED_MASK((1U<<1) | (1U<<2))) {
3046 | lists->ipv4_addr_list = g_list_prepend(lists->ipv4_addr_list, ipv4_hash_table_entry);
3047 | }
3048 | }
3049 |
3050 | /*
3051 | * Add the resolved addresses that are in use to the list used to create the pcapng NRB
3052 | */
3053 | static void
3054 | ipv6_hash_table_resolved_to_list(void *key _U___attribute__((unused)), void *value, void *user_data)
3055 | {
3056 | addrinfo_lists_t *lists = (addrinfo_lists_t *)user_data;
3057 | hashipv6_t *ipv6_hash_table_entry = (hashipv6_t *)value;
3058 |
3059 | if ((ipv6_hash_table_entry->flags & USED_AND_RESOLVED_MASK((1U<<1) | (1U<<2))) == USED_AND_RESOLVED_MASK((1U<<1) | (1U<<2))) {
3060 | lists->ipv6_addr_list = g_list_prepend(lists->ipv6_addr_list, ipv6_hash_table_entry);
3061 | }
3062 | }
3063 |
3064 | addrinfo_lists_t *
3065 | get_addrinfo_list(void)
3066 | {
3067 | if (ipv4_hash_table) {
3068 | wmem_map_foreach(ipv4_hash_table, ipv4_hash_table_resolved_to_list, &addrinfo_lists);
3069 | }
3070 |
3071 | if (ipv6_hash_table) {
3072 | wmem_map_foreach(ipv6_hash_table, ipv6_hash_table_resolved_to_list, &addrinfo_lists);
3073 | }
3074 |
3075 | return &addrinfo_lists;
3076 | }
3077 |
3078 | /* Read in a list of subnet definition - name pairs.
3079 | * <line> = <comment> | <entry> | <whitespace>
3080 | * <comment> = <whitespace>#<any>
3081 | * <entry> = <subnet_definition> <whitespace> <subnet_name> [<comment>|<whitespace><any>]
3082 | * <subnet_definition> = <ipv4_address> / <subnet_mask_length>
3083 | * <ipv4_address> is a full address; it will be masked to get the subnet-ID.
3084 | * <subnet_mask_length> is a decimal 1-31
3085 | * <subnet_name> is a string containing no whitespace.
3086 | * <whitespace> = (space | tab)+
3087 | * Any malformed entries are ignored.
3088 | * Any trailing data after the subnet_name is ignored.
3089 | *
3090 | * XXX Support IPv6
3091 | */
3092 | static bool_Bool
3093 | read_subnets_file (const char *subnetspath)
3094 | {
3095 | FILE *hf;
3096 | char line[MAX_LINELEN1024];
3097 | char *cp, *cp2;
3098 | uint32_t host_addr; /* IPv4 ONLY */
3099 | uint8_t mask_length;
3100 |
3101 | if ((hf = ws_fopenfopen(subnetspath, "r")) == NULL((void*)0))
3102 | return false0;
3103 |
3104 | while (fgetline(line, sizeof(line), hf) >= 0) {
3105 | if ((cp = strchr(line, '#')))
3106 | *cp = '\0';
3107 |
3108 | if ((cp = strtok(line, " \t")) == NULL((void*)0))
3109 | continue; /* no tokens in the line */
3110 |
3111 |
3112 | /* Expected format is <IP4 address>/<subnet length> */
3113 | cp2 = strchr(cp, '/');
3114 | if (NULL((void*)0) == cp2) {
3115 | /* No length */
3116 | continue;
3117 | }
3118 | *cp2 = '\0'; /* Cut token */
3119 | ++cp2 ;
3120 |
3121 | /* Check if this is a valid IPv4 address */
3122 | if (!str_to_ip(cp, &host_addr)) {
3123 | continue; /* no */
3124 | }
3125 |
3126 | if (!ws_strtou8(cp2, NULL((void*)0), &mask_length) || mask_length == 0 || mask_length > 32) {
3127 | continue; /* invalid mask length */
3128 | }
3129 |
3130 | if ((cp = strtok(NULL((void*)0), " \t")) == NULL((void*)0))
3131 | continue; /* no subnet name */
3132 |
3133 | subnet_entry_set(host_addr, mask_length, cp);
3134 | }
3135 |
3136 | fclose(hf);
3137 | return true1;
3138 | } /* read_subnets_file */
3139 |
3140 | static subnet_entry_t
3141 | subnet_lookup(const uint32_t addr)
3142 | {
3143 | subnet_entry_t subnet_entry;
3144 | uint32_t i;
3145 |
3146 | /* Search mask lengths linearly, longest first */
3147 |
3148 | i = SUBNETLENGTHSIZE32;
3149 | while(have_subnet_entry && i > 0) {
3150 | uint32_t masked_addr;
3151 | subnet_length_entry_t* length_entry;
3152 |
3153 | /* Note that we run from 31 (length 32) to 0 (length 1) */
3154 | --i;
3155 | ws_assert(i < SUBNETLENGTHSIZE)do { if ((1) && !(i < 32)) ws_log_fatal_full("", LOG_LEVEL_ERROR , "epan/addr_resolv.c", 3155, __func__, "assertion failed: %s" , "i < 32"); } while (0);
3156 |
3157 |
3158 | length_entry = &subnet_length_entries[i];
3159 |
3160 | if (NULL((void*)0) != length_entry->subnet_addresses) {
3161 | sub_net_hashipv4_t * tp;
3162 | uint32_t hash_idx;
3163 |
3164 | masked_addr = addr & length_entry->mask;
3165 | hash_idx = HASH_IPV4_ADDRESS(masked_addr)((((((guint32) ( (((guint32) (masked_addr) & (guint32) 0x000000ffU ) << 24) | (((guint32) (masked_addr) & (guint32) 0x0000ff00U ) << 8) | (((guint32) (masked_addr) & (guint32) 0x00ff0000U ) >> 8) | (((guint32) (masked_addr) & (guint32) 0xff000000U ) >> 24)))))) & (2048 - 1));
3166 |
3167 | tp = length_entry->subnet_addresses[hash_idx];
3168 | while(tp != NULL((void*)0) && tp->addr != masked_addr) {
3169 | tp = tp->next;
3170 | }
3171 |
3172 | if (NULL((void*)0) != tp) {
3173 | subnet_entry.mask = length_entry->mask;
3174 | subnet_entry.mask_length = i + 1; /* Length is offset + 1 */
3175 | subnet_entry.name = tp->name;
3176 | return subnet_entry;
3177 | }
3178 | }
3179 | }
3180 |
3181 | subnet_entry.mask = 0;
3182 | subnet_entry.mask_length = 0;
3183 | subnet_entry.name = NULL((void*)0);
3184 |
3185 | return subnet_entry;
3186 | }
3187 |
3188 | /* Add a subnet-definition - name pair to the set.
3189 | * The definition is taken by masking the address passed in with the mask of the
3190 | * given length.
3191 | */
3192 | static void
3193 | subnet_entry_set(uint32_t subnet_addr, const uint8_t mask_length, const char* name)
3194 | {
3195 | subnet_length_entry_t* entry;
3196 | sub_net_hashipv4_t * tp;
3197 | size_t hash_idx;
3198 |
3199 | ws_assert(mask_length > 0 && mask_length <= 32)do { if ((1) && !(mask_length > 0 && mask_length <= 32)) ws_log_fatal_full("", LOG_LEVEL_ERROR, "epan/addr_resolv.c" , 3199, __func__, "assertion failed: %s", "mask_length > 0 && mask_length <= 32" ); } while (0);
3200 |
3201 | entry = &subnet_length_entries[mask_length - 1];
3202 |
3203 | subnet_addr &= entry->mask;
3204 |
3205 | hash_idx = HASH_IPV4_ADDRESS(subnet_addr)((((((guint32) ( (((guint32) (subnet_addr) & (guint32) 0x000000ffU ) << 24) | (((guint32) (subnet_addr) & (guint32) 0x0000ff00U ) << 8) | (((guint32) (subnet_addr) & (guint32) 0x00ff0000U ) >> 8) | (((guint32) (subnet_addr) & (guint32) 0xff000000U ) >> 24)))))) & (2048 - 1));
3206 |
3207 | if (NULL((void*)0) == entry->subnet_addresses) {
3208 | entry->subnet_addresses = (sub_net_hashipv4_t**)wmem_alloc0(addr_resolv_scope, sizeof(sub_net_hashipv4_t*) * HASHHOSTSIZE2048);
3209 | }
3210 |
3211 | if (NULL((void*)0) != (tp = entry->subnet_addresses[hash_idx])) {
3212 | sub_net_hashipv4_t * new_tp;
3213 |
3214 | while (tp->next) {
3215 | if (tp->addr == subnet_addr) {
3216 | return; /* XXX provide warning that an address was repeated? */
3217 | } else {
3218 | tp = tp->next;
3219 | }
3220 | }
3221 |
3222 | new_tp = wmem_new(addr_resolv_scope, sub_net_hashipv4_t)((sub_net_hashipv4_t*)wmem_alloc((addr_resolv_scope), sizeof( sub_net_hashipv4_t)));
3223 | tp->next = new_tp;
3224 | tp = new_tp;
3225 | } else {
3226 | tp = entry->subnet_addresses[hash_idx] = wmem_new(addr_resolv_scope, sub_net_hashipv4_t)((sub_net_hashipv4_t*)wmem_alloc((addr_resolv_scope), sizeof( sub_net_hashipv4_t)));
3227 | }
3228 |
3229 | tp->next = NULL((void*)0);
3230 | tp->addr = subnet_addr;
3231 | (void) g_strlcpy(tp->name, name, MAXNAMELEN64); /* This is longer than subnet names can actually be */
3232 | have_subnet_entry = true1;
3233 | }
3234 |
3235 | static void
3236 | subnet_name_lookup_init(const char* app_env_var_prefix)
3237 | {
3238 | char* subnetspath;
3239 | uint32_t i;
3240 |
3241 | for(i = 0; i < SUBNETLENGTHSIZE32; ++i) {
3242 | uint32_t length = i + 1;
3243 |
3244 | subnet_length_entries[i].subnet_addresses = NULL((void*)0);
3245 | subnet_length_entries[i].mask_length = length;
3246 | subnet_length_entries[i].mask = g_htonl(ws_ipv4_get_subnet_mask(length))(((((guint32) ( (((guint32) (ws_ipv4_get_subnet_mask(length)) & (guint32) 0x000000ffU) << 24) | (((guint32) (ws_ipv4_get_subnet_mask (length)) & (guint32) 0x0000ff00U) << 8) | (((guint32 ) (ws_ipv4_get_subnet_mask(length)) & (guint32) 0x00ff0000U ) >> 8) | (((guint32) (ws_ipv4_get_subnet_mask(length)) & (guint32) 0xff000000U) >> 24))))));
3247 | }
3248 |
3249 | /* Check profile directory before personal configuration */
3250 | subnetspath = get_persconffile_path(ENAME_SUBNETS"subnets", true1, app_env_var_prefix);
3251 | if (!read_subnets_file(subnetspath)) {
3252 | if (errno(*__errno_location ()) != ENOENT2) {
3253 | report_open_failure(subnetspath, errno(*__errno_location ()), false0);
3254 | }
3255 |
3256 | g_free(subnetspath);
3257 | subnetspath = get_persconffile_path(ENAME_SUBNETS"subnets", false0, app_env_var_prefix);
3258 | if (!read_subnets_file(subnetspath) && errno(*__errno_location ()) != ENOENT2) {
3259 | report_open_failure(subnetspath, errno(*__errno_location ()), false0);
3260 | }
3261 | }
3262 | g_free(subnetspath);
3263 |
3264 | /*
3265 | * Load the global subnets file, if we have one.
3266 | */
3267 | subnetspath = get_datafile_path(ENAME_SUBNETS"subnets", app_env_var_prefix);
3268 | if (!read_subnets_file(subnetspath) && errno(*__errno_location ()) != ENOENT2) {
3269 | report_open_failure(subnetspath, errno(*__errno_location ()), false0);
3270 | }
3271 | g_free(subnetspath);
3272 | }
3273 |
3274 | /* IPv6 Subnet Name Resolution */
3275 |
3276 | /* Compute a 16-byte subnet mask from a prefix length (1-128). */
3277 | static void
3278 | ipv6_get_subnet_mask(uint32_t mask_length, uint8_t mask[16])
3279 | {
3280 | uint32_t full_bytes = mask_length / 8;
3281 | uint32_t remaining = mask_length % 8;
3282 | memset(mask, 0, 16);
3283 | for (uint32_t i = 0; i < full_bytes; i++)
3284 | mask[i] = 0xff;
3285 | if (remaining > 0 && full_bytes < 16)
3286 | mask[full_bytes] = (uint8_t)(0xff << (8 - remaining));
3287 | }
3288 |
3289 | static void
3290 | subnet6_entry_set(const ws_in6_addr *subnet_addr, const uint32_t mask_length,
3291 | const char *name)
3292 | {
3293 | subnet_length_entry_v6_t *entry;
3294 | sub_net_hashipv6_t *tp;
3295 | uint8_t masked[16];
3296 | size_t hash_idx;
3297 |
3298 | ws_assert(mask_length > 0 && mask_length <= 128)do { if ((1) && !(mask_length > 0 && mask_length <= 128)) ws_log_fatal_full("", LOG_LEVEL_ERROR, "epan/addr_resolv.c" , 3298, __func__, "assertion failed: %s", "mask_length > 0 && mask_length <= 128" ); } while (0);
3299 | entry = &subnet_length_entries_v6[mask_length - 1];
3300 |
3301 | for (int i = 0; i < 16; i++)
3302 | masked[i] = subnet_addr->bytes[i] & entry->mask[i];
3303 |
3304 | hash_idx = ipv6_oat_hash(masked) & (HASHHOSTSIZE2048 - 1);
3305 |
3306 | if (entry->subnet_addresses == NULL((void*)0))
3307 | entry->subnet_addresses = (sub_net_hashipv6_t **)wmem_alloc0(
3308 | addr_resolv_scope, sizeof(sub_net_hashipv6_t *) * HASHHOSTSIZE2048);
3309 |
3310 | if ((tp = entry->subnet_addresses[hash_idx]) != NULL((void*)0)) {
3311 | sub_net_hashipv6_t *new_tp;
3312 | while (tp->next) {
3313 | if (memcmp(tp->addr, masked, 16) == 0)
3314 | return; /* duplicate */
3315 | tp = tp->next;
3316 | }
3317 | if (memcmp(tp->addr, masked, 16) == 0)
3318 | return; /* duplicate at tail */
3319 | new_tp = wmem_new(addr_resolv_scope, sub_net_hashipv6_t)((sub_net_hashipv6_t*)wmem_alloc((addr_resolv_scope), sizeof( sub_net_hashipv6_t)));
3320 | tp->next = new_tp;
3321 | tp = new_tp;
3322 | } else {
3323 | tp = entry->subnet_addresses[hash_idx] =
3324 | wmem_new(addr_resolv_scope, sub_net_hashipv6_t)((sub_net_hashipv6_t*)wmem_alloc((addr_resolv_scope), sizeof( sub_net_hashipv6_t)));
3325 | }
3326 |
3327 | tp->next = NULL((void*)0);
3328 | memcpy(tp->addr, masked, 16);
3329 | (void)g_strlcpy(tp->name, name, MAXNAMELEN64);
3330 | have_subnet_entry_v6 = true1;
3331 | }
3332 |
3333 | static subnet_entry_v6_t
3334 | subnet6_lookup(const ws_in6_addr *addr)
3335 | {
3336 | subnet_entry_v6_t result;
3337 | uint32_t i = SUBNETLENGTHSIZE_V6128;
3338 |
3339 | while (have_subnet_entry_v6 && i > 0) {
3340 | subnet_length_entry_v6_t *length_entry;
3341 | uint8_t masked[16];
3342 | size_t hash_idx;
3343 | sub_net_hashipv6_t *tp;
3344 |
3345 | --i;
3346 | length_entry = &subnet_length_entries_v6[i];
3347 |
3348 | if (length_entry->subnet_addresses == NULL((void*)0))
3349 | continue;
3350 |
3351 | for (int b = 0; b < 16; b++)
3352 | masked[b] = addr->bytes[b] & length_entry->mask[b];
3353 |
3354 | hash_idx = ipv6_oat_hash(masked) & (HASHHOSTSIZE2048 - 1);
3355 | tp = length_entry->subnet_addresses[hash_idx];
3356 |
3357 | while (tp != NULL((void*)0) && memcmp(tp->addr, masked, 16) != 0)
3358 | tp = tp->next;
3359 |
3360 | if (tp != NULL((void*)0)) {
3361 | memcpy(result.mask, length_entry->mask, 16);
3362 | result.mask_length = i + 1;
3363 | result.name = tp->name;
3364 | return result;
3365 | }
3366 | }
3367 |
3368 | memset(result.mask, 0, 16);
3369 | result.mask_length = 0;
3370 | result.name = NULL((void*)0);
3371 | return result;
3372 | }
3373 |
3374 | static bool_Bool
3375 | read_subnets_ipv6_file(const char *subnetspath)
3376 | {
3377 | FILE *hf;
3378 | char line[MAX_LINELEN1024];
3379 | char *cp, *cp2;
3380 | ws_in6_addr host_addr;
3381 | uint32_t mask_length;
3382 |
3383 | if ((hf = ws_fopenfopen(subnetspath, "r")) == NULL((void*)0))
3384 | return false0;
3385 |
3386 | while (fgetline(line, sizeof(line), hf) >= 0) {
3387 | if ((cp = strchr(line, '#')))
3388 | *cp = '\0';
3389 |
3390 | if ((cp = strtok(line, " \t")) == NULL((void*)0))
3391 | continue;
3392 |
3393 | /* Expected format: <IPv6_address>/<prefix_length> */
3394 | cp2 = strchr(cp, '/');
3395 | if (cp2 == NULL((void*)0))
3396 | continue;
3397 | *cp2 = '\0';
3398 | ++cp2;
3399 |
3400 | if (!ws_inet_pton6(cp, &host_addr))
3401 | continue;
3402 |
3403 | if (!ws_strtou32(cp2, NULL((void*)0), &mask_length) || mask_length == 0 || mask_length > 128)
3404 | continue;
3405 |
3406 | if ((cp = strtok(NULL((void*)0), " \t")) == NULL((void*)0))
3407 | continue;
3408 |
3409 | subnet6_entry_set(&host_addr, mask_length, cp);
3410 | }
3411 |
3412 | fclose(hf);
3413 | return true1;
3414 | }
3415 |
3416 | static void
3417 | subnet6_name_lookup_init(const char *app_env_var_prefix)
3418 | {
3419 | char *subnetspath;
3420 |
3421 | for (uint32_t i = 0; i < SUBNETLENGTHSIZE_V6128; ++i) {
3422 | subnet_length_entries_v6[i].subnet_addresses = NULL((void*)0);
3423 | subnet_length_entries_v6[i].mask_length = i + 1;
3424 | ipv6_get_subnet_mask((uint32_t)(i + 1), subnet_length_entries_v6[i].mask);
3425 | }
3426 |
3427 | /* Check profile directory before personal configuration */
3428 | subnetspath = get_persconffile_path(ENAME_SUBNETS_V6"subnetsipv6", true1, app_env_var_prefix);
3429 | if (!read_subnets_ipv6_file(subnetspath)) {
3430 | if (errno(*__errno_location ()) != ENOENT2)
3431 | report_open_failure(subnetspath, errno(*__errno_location ()), false0);
3432 | g_free(subnetspath);
3433 | subnetspath = get_persconffile_path(ENAME_SUBNETS_V6"subnetsipv6", false0, app_env_var_prefix);
3434 | if (!read_subnets_ipv6_file(subnetspath) && errno(*__errno_location ()) != ENOENT2)
3435 | report_open_failure(subnetspath, errno(*__errno_location ()), false0);
3436 | }
3437 | g_free(subnetspath);
3438 |
3439 | /*
3440 | * Load the global IPv6 subnets file, if we have one.
3441 | */
3442 | subnetspath = get_datafile_path(ENAME_SUBNETS_V6"subnetsipv6", app_env_var_prefix);
3443 | if (!read_subnets_ipv6_file(subnetspath) && errno(*__errno_location ()) != ENOENT2)
3444 | report_open_failure(subnetspath, errno(*__errno_location ()), false0);
3445 | g_free(subnetspath);
3446 | }
3447 |
3448 | /* SS7 PC Name Resolution Portion */
3449 | static hashss7pc_t *
3450 | new_ss7pc(const uint8_t ni, const uint32_t pc)
3451 | {
3452 | hashss7pc_t *tp = wmem_new(addr_resolv_scope, hashss7pc_t)((hashss7pc_t*)wmem_alloc((addr_resolv_scope), sizeof(hashss7pc_t )));
3453 | tp->id = (ni<<24) + (pc&0xffffff);
3454 | tp->pc_addr[0] = '\0';
3455 | tp->name[0] = '\0';
3456 |
3457 | return tp;
3458 | }
3459 |
3460 | static hashss7pc_t *
3461 | host_lookup_ss7pc(const uint8_t ni, const uint32_t pc)
3462 | {
3463 | hashss7pc_t * volatile tp;
3464 | uint32_t id;
3465 |
3466 | id = (ni<<24) + (pc&0xffffff);
3467 |
3468 | tp = (hashss7pc_t *)wmem_map_lookup(ss7pc_hash_table, GUINT_TO_POINTER(id)((gpointer) (gulong) (id)));
3469 | if (tp == NULL((void*)0)) {
3470 | tp = new_ss7pc(ni, pc);
3471 | wmem_map_insert(ss7pc_hash_table, GUINT_TO_POINTER(id)((gpointer) (gulong) (id)), tp);
3472 | }
3473 |
3474 | return tp;
3475 | }
3476 |
3477 | void fill_unresolved_ss7pc(const char * pc_addr, const uint8_t ni, const uint32_t pc)
3478 | {
3479 | hashss7pc_t *tp = host_lookup_ss7pc(ni, pc);
3480 |
3481 | (void) g_strlcpy(tp->pc_addr, pc_addr, MAXNAMELEN64);
3482 | }
3483 |
3484 | const char *
3485 | get_hostname_ss7pc(const uint8_t ni, const uint32_t pc)
3486 | {
3487 | hashss7pc_t *tp = host_lookup_ss7pc(ni, pc);
3488 |
3489 | /* never resolved yet*/
3490 | if (tp->pc_addr[0] == '\0')
3491 | return tp->pc_addr;
3492 |
3493 | /* Don't have name in file */
3494 | if (tp->name[0] == '\0')
3495 | return tp->pc_addr;
3496 |
3497 | if (!gbl_resolv_flags.ss7pc_name)
3498 | return tp->pc_addr;
3499 |
3500 | return tp->name;
3501 | }
3502 |
3503 | static void
3504 | add_ss7pc_name(const uint8_t ni, uint32_t pc, const char *name)
3505 | {
3506 | hashss7pc_t *tp;
3507 | uint32_t id;
3508 |
3509 | if (!name || name[0] == '\0')
3510 | return;
3511 |
3512 | id = (ni<<24) + (pc&0xffffff);
3513 | tp = (hashss7pc_t *)wmem_map_lookup(ss7pc_hash_table, GUINT_TO_POINTER(id)((gpointer) (gulong) (id)));
3514 | if (!tp) {
3515 | tp = new_ss7pc(ni, pc);
3516 | wmem_map_insert(ss7pc_hash_table, GUINT_TO_POINTER(id)((gpointer) (gulong) (id)), tp);
3517 | }
3518 |
3519 | if (g_ascii_strcasecmp(tp->name, name)) {
3520 | (void) g_strlcpy(tp->name, name, MAXNAMELEN64);
3521 | }
3522 | }
3523 |
3524 | static bool_Bool
3525 | read_ss7pcs_file(const char *ss7pcspath)
3526 | {
3527 | FILE *hf;
3528 | char line[MAX_LINELEN1024];
3529 | char *cp;
3530 | uint8_t ni;
3531 | uint32_t pc;
3532 | bool_Bool entry_found = false0;
3533 |
3534 | /*
3535 | * File format is Network Indicator (decimal)<dash>Point Code (Decimal)<tab/space>Hostname
3536 | */
3537 | if ((hf = ws_fopenfopen(ss7pcspath, "r")) == NULL((void*)0))
3538 | return false0;
3539 |
3540 | while (fgetline(line, sizeof(line), hf) >= 0) {
3541 | if ((cp = strchr(line, '#')))
3542 | *cp = '\0';
3543 |
3544 | if ((cp = strtok(line, "-")) == NULL((void*)0))
3545 | continue; /*no ni-pc separator*/
3546 | if (!ws_strtou8(cp, NULL((void*)0), &ni))
3547 | continue;
3548 | if (ni > 3)
3549 | continue;
3550 |
3551 | if ((cp = strtok(NULL((void*)0), " \t")) == NULL((void*)0))
3552 | continue; /* no tokens for pc and name */
3553 | if (!ws_strtou32(cp, NULL((void*)0), &pc))
3554 | continue;
3555 | if (pc >> 24 > 0)
3556 | continue;
3557 |
3558 | if ((cp = strtok(NULL((void*)0), " \t")) == NULL((void*)0))
3559 | continue; /* no host name */
3560 |
3561 | entry_found = true1;
3562 | add_ss7pc_name(ni, pc, cp);
3563 | }
3564 |
3565 | fclose(hf);
3566 | return entry_found ? true1 : false0;
3567 | }
3568 |
3569 | static void
3570 | ss7pc_name_lookup_init(const char* app_env_var_prefix)
3571 | {
3572 | char *ss7pcspath;
3573 |
3574 | ws_assert(ss7pc_hash_table == NULL)do { if ((1) && !(ss7pc_hash_table == ((void*)0))) ws_log_fatal_full ("", LOG_LEVEL_ERROR, "epan/addr_resolv.c", 3574, __func__, "assertion failed: %s" , "ss7pc_hash_table == ((void*)0)"); } while (0);
3575 |
3576 | ss7pc_hash_table = wmem_map_new(addr_resolv_scope, g_direct_hash, g_direct_equal);
3577 |
3578 | /*
3579 | * Load the user's ss7pcs file
3580 | */
3581 | ss7pcspath = get_persconffile_path(ENAME_SS7PCS"ss7pcs", true1, app_env_var_prefix);
3582 | if (!read_ss7pcs_file(ss7pcspath) && errno(*__errno_location ()) != ENOENT2) {
3583 | report_open_failure(ss7pcspath, errno(*__errno_location ()), false0);
3584 | }
3585 | g_free(ss7pcspath);
3586 | }
3587 |
3588 | /* SS7PC Name Resolution End*/
3589 |
3590 | /* TACS */
3591 | static bool_Bool
3592 | read_tacs_file(const char *tacspath)
3593 | {
3594 | FILE *hf;
3595 | char line[MAX_LINELEN1024];
3596 | char *cp;
3597 | uint16_t id;
3598 |
3599 | /*
3600 | * File format is TAC(decimal)<tab/space>TACName (no spaces)
3601 | */
3602 | if ((hf = ws_fopenfopen(tacspath, "r")) == NULL((void*)0))
3603 | return false0;
3604 |
3605 | while (fgetline(line, sizeof(line), hf) >= 0) {
3606 | if ((cp = strchr(line, '#')))
3607 | *cp = '\0';
3608 |
3609 | if ((cp = strtok(line, " \t")) == NULL((void*)0))
3610 | continue;
3611 |
3612 | if (sscanf(cp, "%" SCNu16"hu", &id) != 1) {
3613 | continue;
3614 | }
3615 |
3616 | if ((cp = strtok(NULL((void*)0), " \t\n")) == NULL((void*)0))
3617 | continue; /* no TAC name */
3618 |
3619 | if (!wmem_map_lookup(tac_hash_table, GUINT_TO_POINTER(id)((gpointer) (gulong) (id)))) {
3620 | char *buf = wmem_strdup(addr_resolv_scope, cp);
3621 | wmem_map_insert(tac_hash_table, GUINT_TO_POINTER(id)((gpointer) (gulong) (id)), (void *)buf);
3622 | }
3623 | }
3624 |
3625 | fclose(hf);
3626 | return true1;
3627 | }
3628 |
3629 | static void
3630 | initialize_tacs(const char* app_env_var_prefix)
3631 | {
3632 | char *tacspath;
3633 | ws_assert(tac_hash_table == NULL)do { if ((1) && !(tac_hash_table == ((void*)0))) ws_log_fatal_full ("", LOG_LEVEL_ERROR, "epan/addr_resolv.c", 3633, __func__, "assertion failed: %s" , "tac_hash_table == ((void*)0)"); } while (0);
3634 | tac_hash_table = wmem_map_new(addr_resolv_scope, g_direct_hash, g_direct_equal);
3635 |
3636 | tacspath = get_persconffile_path(ENAME_TACS"tacs", true1, app_env_var_prefix);
3637 | if (!read_tacs_file(tacspath) && errno(*__errno_location ()) != ENOENT2) {
3638 | report_open_failure(tacspath, errno(*__errno_location ()), false0);
3639 | }
3640 | g_free(tacspath);
3641 | }
3642 |
3643 | static void
3644 | tac_name_lookup_cleanup(void)
3645 | {
3646 | tac_hash_table = NULL((void*)0);
3647 | }
3648 |
3649 | const char *
3650 | tac_name_lookup(const unsigned id)
3651 | {
3652 | return (const char *)wmem_map_lookup(tac_hash_table, GUINT_TO_POINTER(id)((gpointer) (gulong) (id)));
3653 | }
3654 | /* TAC END */
3655 |
3656 | /*
3657 | * External Functions
3658 | */
3659 |
3660 | void
3661 | addr_resolve_pref_init(module_t *nameres)
3662 | {
3663 | prefs_register_bool_preference(nameres, "mac_name",
3664 | "Resolve MAC addresses",
3665 | "Resolve Ethernet MAC addresses to host names from the preferences"
3666 | " or system's Ethers file, or to a manufacturer based name.",
3667 | &gbl_resolv_flags.mac_name);
3668 |
3669 | prefs_register_bool_preference(nameres, "transport_name",
3670 | "Resolve transport names",
3671 | "Resolve TCP/UDP ports into service names",
3672 | &gbl_resolv_flags.transport_name);
3673 |
3674 | prefs_register_bool_preference(nameres, "network_name",
3675 | "Resolve network (IP) addresses",
3676 | "Resolve IPv4, IPv6, and IPX addresses into host names."
3677 | " The next set of check boxes determines how name resolution should be performed."
3678 | " If no other options are checked name resolution is made from Wireshark's host, subnets or subnetsipv6 file"
3679 | " and capture file name resolution blocks.",
3680 | &gbl_resolv_flags.network_name);
3681 |
3682 | prefs_register_bool_preference(nameres, "dns_pkt_addr_resolution",
3683 | "Use captured DNS packet data for name resolution",
3684 | "Use address/name pairs found in captured DNS packets for name resolution.",
3685 | &gbl_resolv_flags.dns_pkt_addr_resolution);
3686 |
3687 | prefs_register_bool_preference(nameres, "handshake_sni_addr_resolution",
3688 | "Use SNI information from captured handshake packets",
3689 | "Use the Server Name Indication found in TLS handshakes for name resolution.",
3690 | &gbl_resolv_flags.handshake_sni_addr_resolution);
3691 |
3692 | prefs_register_bool_preference(nameres, "use_external_name_resolver",
3693 | "Use your system's DNS settings for name resolution",
3694 | "Use your system's configured name resolver"
3695 | " (usually DNS) to resolve network names."
3696 | " Only applies when network name resolution"
3697 | " is enabled.",
3698 | &gbl_resolv_flags.use_external_net_name_resolver);
3699 |
3700 | prefs_register_bool_preference(nameres, "use_custom_dns_servers",
3701 | "Use a custom list of DNS servers for name resolution",
3702 | "Use a DNS Servers list to resolve network names if true. If false, default information is used",
3703 | &use_custom_dns_server_list);
3704 |
3705 | static uat_field_t dns_server_uats_flds[] = {
3706 | UAT_FLD_CSTRING_OTHER(dnsserverlist_uats, ipaddr, "IP address", dnsserver_uat_fld_ip_chk_cb, "IPv4 or IPv6 address"){"ipaddr", "IP address", PT_TXTMOD_STRING,{ dnsserver_uat_fld_ip_chk_cb ,dnsserverlist_uats_ipaddr_set_cb,dnsserverlist_uats_ipaddr_tostr_cb },{0,0,0},0,"IPv4 or IPv6 address",((void*)0)},
3707 | UAT_FLD_CSTRING_OTHER(dnsserverlist_uats, tcp_port, "TCP Port", dnsserver_uat_fld_port_chk_cb, "Port Number (TCP)"){"tcp_port", "TCP Port", PT_TXTMOD_STRING,{ dnsserver_uat_fld_port_chk_cb ,dnsserverlist_uats_tcp_port_set_cb,dnsserverlist_uats_tcp_port_tostr_cb },{0,0,0},0,"Port Number (TCP)",((void*)0)},
3708 | UAT_FLD_CSTRING_OTHER(dnsserverlist_uats, udp_port, "UDP Port", dnsserver_uat_fld_port_chk_cb, "Port Number (UDP)"){"udp_port", "UDP Port", PT_TXTMOD_STRING,{ dnsserver_uat_fld_port_chk_cb ,dnsserverlist_uats_udp_port_set_cb,dnsserverlist_uats_udp_port_tostr_cb },{0,0,0},0,"Port Number (UDP)",((void*)0)},
3709 | UAT_END_FIELDS{((void*)0),((void*)0),PT_TXTMOD_NONE,{0,0,0},{0,0,0},0,0,((void *)0)}
3710 | };
3711 |
3712 | dnsserver_uat = uat_new("DNS Servers",
3713 | sizeof(struct dns_server_data),
3714 | "addr_resolve_dns_servers", /* filename */
3715 | true1, /* from_profile */
3716 | &dnsserverlist_uats, /* data_ptr */
3717 | &ndnsservers, /* numitems_ptr */
3718 | UAT_AFFECTS_DISSECTION0x00000001,
3719 | NULL((void*)0),
3720 | dns_server_copy_cb,
3721 | NULL((void*)0),
3722 | dns_server_free_cb,
3723 | c_ares_set_dns_servers,
3724 | NULL((void*)0),
3725 | dns_server_uats_flds);
3726 | static const char *dnsserver_uat_defaults[] = { NULL((void*)0), "53", "53" };
3727 | uat_set_default_values(dnsserver_uat, dnsserver_uat_defaults);
3728 | prefs_register_uat_preference(nameres, "dns_servers",
3729 | "DNS Servers",
3730 | "A table of IPv4 and IPv6 addresses of DNS servers to be used to resolve IP names and addresses",
3731 | dnsserver_uat);
3732 |
3733 | prefs_register_obsolete_preference(nameres, "concurrent_dns");
3734 |
3735 | prefs_register_uint_preference(nameres, "name_resolve_concurrency",
3736 | "Maximum concurrent requests",
3737 | "The maximum number of DNS requests that may"
3738 | " be active at any time. A large value (many"
3739 | " thousands) might overload the network or make"
3740 | " your DNS server behave badly.",
3741 | 10,
3742 | &name_resolve_concurrency);
3743 |
3744 | prefs_register_obsolete_preference(nameres, "hosts_file_handling");
3745 |
3746 | prefs_register_bool_preference(nameres, "vlan_name",
3747 | "Resolve VLAN IDs",
3748 | "Resolve VLAN IDs to network names from the preferences \"vlans\" file."
3749 | " Format of the file is: \"ID<Tab>Name\"."
3750 | " One line per VLAN, e.g.: 1 Management",
3751 | &gbl_resolv_flags.vlan_name);
3752 |
3753 | prefs_register_bool_preference(nameres, "ss7_pc_name",
3754 | "Resolve SS7 PCs",
3755 | "Resolve SS7 Point Codes to node names from the profiles \"ss7pcs\" file."
3756 | " Format of the file is: \"Network_Indicator<Dash>PC_Decimal<Tab>Name\"."
3757 | " One line per Point Code, e.g.: 2-1234 MyPointCode1",
3758 | &gbl_resolv_flags.ss7pc_name);
3759 |
3760 | prefs_register_bool_preference(nameres, "tac_name",
3761 | "Resolve TAC",
3762 | "Resolve TAC to area names from the preferences \"tac\" file."
3763 | " Format of the file is: \"TAC(decimail)<Tab/space>Name\"."
3764 | " One line per TAC, e.g.: 30123 City1",
3765 | &gbl_resolv_flags.tac_name);
3766 |
3767 | }
3768 |
3769 | void addr_resolve_pref_apply(void)
3770 | {
3771 | c_ares_set_dns_servers();
3772 | maxmind_db_pref_apply();
3773 | }
3774 |
3775 | void
3776 | disable_name_resolution(void) {
3777 | gbl_resolv_flags.mac_name = false0;
3778 | gbl_resolv_flags.network_name = false0;
3779 | gbl_resolv_flags.transport_name = false0;
3780 | gbl_resolv_flags.dns_pkt_addr_resolution = false0;
3781 | gbl_resolv_flags.handshake_sni_addr_resolution = false0;
3782 | gbl_resolv_flags.use_external_net_name_resolver = false0;
3783 | gbl_resolv_flags.vlan_name = false0;
3784 | gbl_resolv_flags.ss7pc_name = false0;
3785 | gbl_resolv_flags.maxmind_geoip = false0;
3786 | gbl_resolv_flags.tac_name = false0;
3787 | }
3788 |
3789 | bool_Bool
3790 | host_name_lookup_process(void) {
3791 | struct timeval tv = { 0, 0 };
3792 | int nfds;
3793 | fd_set rfds, wfds;
3794 | bool_Bool nro = new_resolved_objects;
3795 |
3796 | new_resolved_objects = false0;
3797 | nro |= maxmind_db_lookup_process();
3798 |
3799 | if (!async_dns_initialized)
3800 | /* c-ares not initialized. Bail out and cancel timers. */
3801 | return nro;
3802 |
3803 | process_async_dns_queue();
3804 |
3805 | FD_ZERO(&rfds)do { unsigned int __i; fd_set *__arr = (&rfds); for (__i = 0; __i < sizeof (fd_set) / sizeof (__fd_mask); ++__i) ((__arr )->__fds_bits)[__i] = 0; } while (0);
3806 | FD_ZERO(&wfds)do { unsigned int __i; fd_set *__arr = (&wfds); for (__i = 0; __i < sizeof (fd_set) / sizeof (__fd_mask); ++__i) ((__arr )->__fds_bits)[__i] = 0; } while (0);
3807 | nfds = ares_fds(ghba_chan, &rfds, &wfds);
3808 | if (nfds > 0) {
3809 | if (select(nfds, &rfds, &wfds, NULL((void*)0), &tv) == -1) { /* call to select() failed */
3810 | /* If it's interrupted by a signal, no need to put out a message */
3811 | if (errno(*__errno_location ()) != EINTR4)
3812 | fprintf(stderrstderr, "Warning: call to select() failed, error is %s\n", g_strerror(errno(*__errno_location ())));
3813 | return nro;
3814 | }
3815 | ares_process(ghba_chan, &rfds, &wfds);
3816 | }
3817 |
3818 | /* Any new entries? */
3819 | return nro;
3820 | }
3821 |
3822 | static void
3823 | _host_name_lookup_cleanup(void) {
3824 | async_dns_queue_head = NULL((void*)0);
3825 |
3826 | if (async_dns_initialized) {
3827 | ares_destroy(ghba_chan);
3828 | ares_destroy(ghbn_chan);
3829 | }
3830 | #ifdef CARES_HAVE_ARES_LIBRARY_INIT1
3831 | ares_library_cleanup();
3832 | #endif
3833 | async_dns_initialized = false0;
3834 | }
3835 |
3836 | const char *
3837 | get_hostname(const unsigned addr)
3838 | {
3839 | /* XXX why do we call this if we're not resolving? To create hash entries?
3840 | * Why? So that we can return a const char*?
3841 | *
3842 | * Note the returned string is in addr_resolv_scope, which has a similar
3843 | * life to the global file scope (slightly larger, in that the resolved
3844 | * addresses need to be available during dissector registration, e.g.
3845 | * for RADIUS and enterprises), so if not copied it is possible to use
3846 | * it after freeing.
3847 | *
3848 | * Should this be deprecated in favor of get_hostname_wmem so that
3849 | * host name lookups don't increase persistent memory usage even when
3850 | * hostname lookups are disabled? (An alternative would be to return
3851 | * NULL when lookups are disabled, but callers don't expect that.)
3852 | */
3853 | hashipv4_t *tp = host_lookup(addr);
3854 |
3855 | if (!gbl_resolv_flags.network_name)
3856 | return tp->ip;
3857 |
3858 | tp->flags |= RESOLVED_ADDRESS_USED(1U<<2);
3859 |
3860 | return tp->name;
3861 | }
3862 |
3863 | char *
3864 | get_hostname_wmem(wmem_allocator_t *allocator, const unsigned addr)
3865 | {
3866 | if (!gbl_resolv_flags.network_name)
3867 | return ip_addr_to_str(allocator, &addr);
3868 |
3869 | hashipv4_t *tp = host_lookup(addr);
3870 |
3871 | tp->flags |= RESOLVED_ADDRESS_USED(1U<<2);
3872 |
3873 | return wmem_strdup(allocator, tp->name);
3874 | }
3875 | /* -------------------------- */
3876 |
3877 | const char *
3878 | get_hostname6(const ws_in6_addr *addr)
3879 | {
3880 | /* XXX why do we call this if we're not resolving? To create hash entries?
3881 | * Why? The same comments as get_hostname above apply.
3882 | */
3883 | hashipv6_t *tp = host_lookup6(addr);
3884 |
3885 | if (!gbl_resolv_flags.network_name)
3886 | return tp->ip6;
3887 |
3888 | tp->flags |= RESOLVED_ADDRESS_USED(1U<<2);
3889 |
3890 | return tp->name;
3891 | }
3892 |
3893 | char *
3894 | get_hostname6_wmem(wmem_allocator_t *allocator, const ws_in6_addr *addr)
3895 | {
3896 | if (!gbl_resolv_flags.network_name)
3897 | return ip6_to_str(allocator, addr);
3898 |
3899 | hashipv6_t *tp = host_lookup6(addr);
3900 |
3901 | tp->flags |= RESOLVED_ADDRESS_USED(1U<<2);
3902 |
3903 | return wmem_strdup(allocator, tp->name);
3904 | }
3905 | /* -------------------------- */
3906 | void
3907 | add_ipv4_name(const unsigned addr, const char *name, bool_Bool static_entry)
3908 | {
3909 | hashipv4_t *tp;
3910 |
3911 | /*
3912 | * Don't add zero-length names; apparently, some resolvers will return
3913 | * them if they get them from DNS.
3914 | */
3915 | if (!name || name[0] == '\0')
3916 | return;
3917 |
3918 | tp = (hashipv4_t *)wmem_map_lookup(ipv4_hash_table, GUINT_TO_POINTER(addr)((gpointer) (gulong) (addr)));
3919 | if (!tp) {
3920 | tp = new_ipv4(addr);
3921 | wmem_map_insert(ipv4_hash_table, GUINT_TO_POINTER(addr)((gpointer) (gulong) (addr)), tp);
3922 | }
3923 |
3924 | if (g_ascii_strcasecmp(tp->name, name) && (static_entry || !(tp->flags & STATIC_HOSTNAME(1U<<3)))) {
3925 | (void) g_strlcpy(tp->name, name, MAXDNSNAMELEN256);
3926 | new_resolved_objects = true1;
3927 | if (static_entry)
3928 | tp->flags |= STATIC_HOSTNAME(1U<<3);
3929 | }
3930 | tp->flags |= TRIED_RESOLVE_ADDRESS(1U<<0)|NAME_RESOLVED(1U<<1);
3931 | } /* add_ipv4_name */
3932 |
3933 | /* -------------------------- */
3934 | void
3935 | add_ipv6_name(const ws_in6_addr *addrp, const char *name, const bool_Bool static_entry)
3936 | {
3937 | hashipv6_t *tp;
3938 |
3939 | /*
3940 | * Don't add zero-length names; apparently, some resolvers will return
3941 | * them if they get them from DNS.
3942 | */
3943 | if (!name || name[0] == '\0')
3944 | return;
3945 |
3946 | tp = (hashipv6_t *)wmem_map_lookup(ipv6_hash_table, addrp);
3947 | if (!tp) {
3948 | ws_in6_addr *addr_key;
3949 |
3950 | addr_key = wmem_new(addr_resolv_scope, ws_in6_addr)((ws_in6_addr*)wmem_alloc((addr_resolv_scope), sizeof(ws_in6_addr )));
3951 | tp = new_ipv6(addrp);
3952 | memcpy(addr_key, addrp, 16);
3953 | wmem_map_insert(ipv6_hash_table, addr_key, tp);
3954 | }
3955 |
3956 | if (g_ascii_strcasecmp(tp->name, name) && (static_entry || !(tp->flags & STATIC_HOSTNAME(1U<<3)))) {
3957 | (void) g_strlcpy(tp->name, name, MAXDNSNAMELEN256);
3958 | new_resolved_objects = true1;
3959 | if (static_entry)
3960 | tp->flags |= STATIC_HOSTNAME(1U<<3);
3961 | }
3962 | tp->flags |= TRIED_RESOLVE_ADDRESS(1U<<0)|NAME_RESOLVED(1U<<1);
3963 | } /* add_ipv6_name */
3964 |
3965 | static void
3966 | add_manually_resolved_ipv4(void *key, void *value, void *user_data _U___attribute__((unused)))
3967 | {
3968 | resolved_name_t *resolved_ipv4_entry = (resolved_name_t*)value;
3969 | add_ipv4_name(GPOINTER_TO_UINT(key)((guint) (gulong) (key)), resolved_ipv4_entry->name, true1);
3970 | }
3971 |
3972 | static void
3973 | add_manually_resolved_ipv6(void *key, void *value, void *user_data _U___attribute__((unused)))
3974 | {
3975 | resolved_name_t *resolved_ipv6_entry = (resolved_name_t*)value;
3976 | add_ipv6_name((ws_in6_addr*)key, resolved_ipv6_entry->name, true1);
3977 | }
3978 |
3979 | static void
3980 | add_manually_resolved(void)
3981 | {
3982 | if (manually_resolved_ipv4_list) {
3983 | wmem_map_foreach(manually_resolved_ipv4_list, add_manually_resolved_ipv4, NULL((void*)0));
3984 | }
3985 |
3986 | if (manually_resolved_ipv6_list) {
3987 | wmem_map_foreach(manually_resolved_ipv6_list, add_manually_resolved_ipv6, NULL((void*)0));
3988 | }
3989 | }
3990 |
3991 | static void
3992 | host_name_lookup_init(const char* app_env_var_prefix)
3993 | {
3994 | char *hostspath;
3995 | unsigned i;
3996 |
3997 | ws_assert(ipxnet_hash_table == NULL)do { if ((1) && !(ipxnet_hash_table == ((void*)0))) ws_log_fatal_full ("", LOG_LEVEL_ERROR, "epan/addr_resolv.c", 3997, __func__, "assertion failed: %s" , "ipxnet_hash_table == ((void*)0)"); } while (0);
5 | ← | Assuming 'ipxnet_hash_table' is equal to null | →
6 | ← | Taking false branch | →
7 | ← | Loop condition is false. Exiting loop | →
3998 | ipxnet_hash_table = wmem_map_new(addr_resolv_scope, g_direct_hash, g_direct_equal);
3999 |
4000 | ws_assert(ipv4_hash_table == NULL)do { if ((1) && !(ipv4_hash_table == ((void*)0))) ws_log_fatal_full ("", LOG_LEVEL_ERROR, "epan/addr_resolv.c", 4000, __func__, "assertion failed: %s" , "ipv4_hash_table == ((void*)0)"); } while (0);
8 | ← | Assuming 'ipv4_hash_table' is equal to null | →
9 | ← | Taking false branch | →
10 | ← | Loop condition is false. Exiting loop | →
4001 | ipv4_hash_table = wmem_map_new(addr_resolv_scope, g_direct_hash, g_direct_equal);
4002 |
4003 | ws_assert(ipv6_hash_table == NULL)do { if ((1) && !(ipv6_hash_table == ((void*)0))) ws_log_fatal_full ("", LOG_LEVEL_ERROR, "epan/addr_resolv.c", 4003, __func__, "assertion failed: %s" , "ipv6_hash_table == ((void*)0)"); } while (0);
11 | ← | Assuming 'ipv6_hash_table' is equal to null | →
12 | ← | Taking false branch | →
13 | ← | Loop condition is false. Exiting loop | →
4004 | ipv6_hash_table = wmem_map_new(addr_resolv_scope, ipv6_oat_hash, ipv6_equal);
4005 |
4006 | ws_assert(async_dns_queue_head == NULL)do { if ((1) && !(async_dns_queue_head == ((void*)0)) ) ws_log_fatal_full("", LOG_LEVEL_ERROR, "epan/addr_resolv.c" , 4006, __func__, "assertion failed: %s", "async_dns_queue_head == ((void*)0)" ); } while (0);
14 | ← | Assuming 'async_dns_queue_head' is equal to null | →
15 | ← | Taking false branch | →
16 | ← | Loop condition is false. Exiting loop | →
4007 | async_dns_queue_head = wmem_list_new(addr_resolv_scope);
4008 |
4009 | /*
4010 | * The manually resolved lists are the only address resolution maps
4011 | * that are not reset by addr_resolv_cleanup(), because they are
4012 | * the only ones that do not have entries from personal configuration
4013 | * files that can change when changing configurations. All their
4014 | * entries must also be in epan scope.
4015 | */
4016 | if (manually_resolved_ipv4_list == NULL((void*)0))
17 | ← | Assuming 'manually_resolved_ipv4_list' is not equal to NULL | →
18 | ← | Taking false branch | →
4017 | manually_resolved_ipv4_list = wmem_map_new(wmem_epan_scope(), g_direct_hash, g_direct_equal);
4018 |
4019 | if (manually_resolved_ipv6_list == NULL((void*)0))
19 | ← | Assuming 'manually_resolved_ipv6_list' is not equal to NULL | →
20 | ← | Taking false branch | →
4020 | manually_resolved_ipv6_list = wmem_map_new(wmem_epan_scope(), ws_ipv6_hash, ipv6_equal);
4021 |
4022 | /*
4023 | * Load the global hosts file, if we have one.
4024 | */
4025 | hostspath = get_datafile_path(ENAME_HOSTS"hosts", app_env_var_prefix);
4026 | if (!read_hosts_file(hostspath, true1) && errno(*__errno_location ()) != ENOENT2) {
21 | ← | Calling 'read_hosts_file' | →
26 | ← | Returning from 'read_hosts_file' | →
27 | ← | An undefined value may be read from 'errno'
4027 | report_open_failure(hostspath, errno(*__errno_location ()), false0);
4028 | }
4029 | g_free(hostspath);
4030 | /*
4031 | * Load the user's hosts file no matter what, if they have one.
4032 | */
4033 | hostspath = get_persconffile_path(ENAME_HOSTS"hosts", true1, app_env_var_prefix);
4034 | if (!read_hosts_file(hostspath, true1) && errno(*__errno_location ()) != ENOENT2) {
4035 | report_open_failure(hostspath, errno(*__errno_location ()), false0);
4036 | }
4037 | g_free(hostspath);
4038 | #ifdef CARES_HAVE_ARES_LIBRARY_INIT1
4039 | if (ares_library_init(ARES_LIB_INIT_ALL((1 << 0))) == ARES_SUCCESS) {
4040 | #endif
4041 | /* XXX - Check which options we should set */
4042 | if (ares_init_options(&ghba_chan, NULL((void*)0), 0) == ARES_SUCCESS && ares_init_options(&ghbn_chan, NULL((void*)0), 0) == ARES_SUCCESS) {
4043 | async_dns_initialized = true1;
4044 | c_ares_set_dns_servers();
4045 | }
4046 | #ifdef CARES_HAVE_ARES_LIBRARY_INIT1
4047 | }
4048 | #endif
4049 |
4050 | if (extra_hosts_files) {
4051 | for (i = 0; i < extra_hosts_files->len; i++) {
4052 | read_hosts_file((const char *) g_ptr_array_index(extra_hosts_files, i)((extra_hosts_files)->pdata)[i], true1);
4053 | }
4054 | }
4055 |
4056 | subnet_name_lookup_init(app_env_var_prefix);
4057 | subnet6_name_lookup_init(app_env_var_prefix);
4058 |
4059 | add_manually_resolved();
4060 |
4061 | ss7pc_name_lookup_init(app_env_var_prefix);
4062 | }
4063 |
4064 | static void
4065 | host_name_lookup_cleanup(void)
4066 | {
4067 | uint32_t i, j;
4068 | sub_net_hashipv4_t *entry, *next_entry;
4069 |
4070 | _host_name_lookup_cleanup();
4071 |
4072 | ipxnet_hash_table = NULL((void*)0);
4073 | ipv4_hash_table = NULL((void*)0);
4074 | ipv6_hash_table = NULL((void*)0);
4075 | ss7pc_hash_table = NULL((void*)0);
4076 |
4077 | for(i = 0; i < SUBNETLENGTHSIZE32; ++i) {
4078 | if (subnet_length_entries[i].subnet_addresses != NULL((void*)0)) {
4079 | for (j = 0; j < HASHHOSTSIZE2048; j++) {
4080 | for (entry = subnet_length_entries[i].subnet_addresses[j];
4081 | entry != NULL((void*)0); entry = next_entry) {
4082 | next_entry = entry->next;
4083 | wmem_free(addr_resolv_scope, entry);
4084 | }
4085 | }
4086 | wmem_free(addr_resolv_scope, subnet_length_entries[i].subnet_addresses);
4087 | subnet_length_entries[i].subnet_addresses = NULL((void*)0);
4088 | }
4089 | }
4090 |
4091 | have_subnet_entry = false0;
4092 |
4093 | for(i = 0; i < SUBNETLENGTHSIZE_V6128; ++i) {
4094 | sub_net_hashipv6_t *entry6, *next_entry6;
4095 | if (subnet_length_entries_v6[i].subnet_addresses != NULL((void*)0)) {
4096 | for (j = 0; j < HASHHOSTSIZE2048; j++) {
4097 | for (entry6 = subnet_length_entries_v6[i].subnet_addresses[j];
4098 | entry6 != NULL((void*)0); entry6 = next_entry6) {
4099 | next_entry6 = entry6->next;
4100 | wmem_free(addr_resolv_scope, entry6);
4101 | }
4102 | }
4103 | wmem_free(addr_resolv_scope, subnet_length_entries_v6[i].subnet_addresses);
4104 | subnet_length_entries_v6[i].subnet_addresses = NULL((void*)0);
4105 | }
4106 | }
4107 | have_subnet_entry_v6 = false0;
4108 |
4109 | new_resolved_objects = false0;
4110 | }
4111 |
4112 |
4113 | void host_name_lookup_reset(const char* app_env_var_prefix)
4114 | {
4115 | addr_resolv_cleanup();
4116 | addr_resolv_init(app_env_var_prefix);
1 | Calling 'addr_resolv_init' | →
4117 | }
4118 |
4119 | char *
4120 | udp_port_to_display(wmem_allocator_t *allocator, unsigned port)
4121 | {
4122 |
4123 | if (!gbl_resolv_flags.transport_name) {
4124 | return wmem_utoa(allocator, port);
4125 | }
4126 |
4127 | return wmem_strdup(allocator, serv_name_lookup(PT_UDP, port));
4128 |
4129 | } /* udp_port_to_display */
4130 |
4131 | char *
4132 | dccp_port_to_display(wmem_allocator_t *allocator, unsigned port)
4133 | {
4134 |
4135 | if (!gbl_resolv_flags.transport_name) {
4136 | return wmem_utoa(allocator, port);
4137 | }
4138 |
4139 | return wmem_strdup(allocator, serv_name_lookup(PT_DCCP, port));
4140 |
4141 | } /* dccp_port_to_display */
4142 |
4143 | char *
4144 | tcp_port_to_display(wmem_allocator_t *allocator, unsigned port)
4145 | {
4146 |
4147 | if (!gbl_resolv_flags.transport_name) {
4148 | return wmem_utoa(allocator, port);
4149 | }
4150 |
4151 | return wmem_strdup(allocator, serv_name_lookup(PT_TCP, port));
4152 |
4153 | } /* tcp_port_to_display */
4154 |
4155 | char *
4156 | sctp_port_to_display(wmem_allocator_t *allocator, unsigned port)
4157 | {
4158 |
4159 | if (!gbl_resolv_flags.transport_name) {
4160 | return wmem_utoa(allocator, port);
4161 | }
4162 |
4163 | return wmem_strdup(allocator, serv_name_lookup(PT_SCTP, port));
4164 |
4165 | } /* sctp_port_to_display */
4166 |
4167 | char *
4168 | port_with_resolution_to_str(wmem_allocator_t *scope, port_type proto, unsigned port)
4169 | {
4170 | const char *port_str;
4171 |
4172 | if (!gbl_resolv_flags.transport_name || (proto == PT_NONE)) {
4173 | /* No name resolution support, just return port string */
4174 | return wmem_strdup_printf(scope, "%u", port);
4175 | }
4176 | port_str = serv_name_lookup(proto, port);
4177 | ws_assert(port_str)do { if ((1) && !(port_str)) ws_log_fatal_full("", LOG_LEVEL_ERROR , "epan/addr_resolv.c", 4177, __func__, "assertion failed: %s" , "port_str"); } while (0);
4178 | return wmem_strdup_printf(scope, "%s (%u)", port_str, port);
4179 | }
4180 |
4181 | int
4182 | port_with_resolution_to_str_buf(char *buf, unsigned long buf_size, port_type proto, unsigned port)
4183 | {
4184 | const char *port_str;
4185 |
4186 | if (!gbl_resolv_flags.transport_name || (proto == PT_NONE)) {
4187 | /* No name resolution support, just return port string */
4188 | return snprintf(buf, buf_size, "%u", port);
4189 | }
4190 | port_str = serv_name_lookup(proto, port);
4191 | ws_assert(port_str)do { if ((1) && !(port_str)) ws_log_fatal_full("", LOG_LEVEL_ERROR , "epan/addr_resolv.c", 4191, __func__, "assertion failed: %s" , "port_str"); } while (0);
4192 | return snprintf(buf, buf_size, "%s (%u)", port_str, port);
4193 | }
4194 |
4195 | const char *
4196 | get_ether_name(const uint8_t *addr)
4197 | {
4198 | hashether_t *tp;
4199 | bool_Bool resolve = gbl_resolv_flags.mac_name;
4200 |
4201 | tp = eth_name_lookup(addr, resolve);
4202 |
4203 | return resolve ? tp->resolved_name : tp->hexaddr;
4204 |
4205 | } /* get_ether_name */
4206 |
4207 | const char *
4208 | tvb_get_ether_name(tvbuff_t *tvb, unsigned offset)
4209 | {
4210 | return get_ether_name(tvb_get_ptr(tvb, offset, 6));
4211 | }
4212 |
4213 | /* Look for a (non-dummy) ether name in the hash, and return it if found.
4214 | * If it's not found, simply return NULL.
4215 | */
4216 | const char *
4217 | get_ether_name_if_known(const uint8_t *addr)
4218 | {
4219 | hashether_t *tp;
4220 |
4221 | /* Initialize ether structs if we're the first
4222 | * ether-related function called */
4223 | if (!gbl_resolv_flags.mac_name)
4224 | return NULL((void*)0);
4225 |
4226 | /* eth_name_lookup will create a (resolved) hash entry
4227 | * if it doesn't exist, so it never returns NULL */
4228 | tp = eth_name_lookup(addr, true1);
4229 |
4230 | if ((tp->flags & (NAME_RESOLVED(1U<<1) | NAME_RESOLVED_PREFIX(1U<<4))) == NAME_RESOLVED(1U<<1)) {
4231 | /* Name is from an exact match, not a prefix/OUI */
4232 | return tp->resolved_name;
4233 | }
4234 | else {
4235 | /* Name was created */
4236 | return NULL((void*)0);
4237 | }
4238 | }
4239 |
4240 | void
4241 | add_ether_byip(const unsigned ip, const uint8_t *eth)
4242 | {
4243 | hashipv4_t *tp;
4244 |
4245 | /* first check that IP address can be resolved */
4246 | if (!gbl_resolv_flags.network_name)
4247 | return;
4248 |
4249 | tp = host_lookup(ip);
4250 |
4251 | /*
4252 | * Was this IP address resolved to a host name?
4253 | */
4254 | if (tp->flags & NAME_RESOLVED(1U<<1)) {
4255 | /*
4256 | * Yes, so add an entry in the ethers hashtable resolving
4257 | * the MAC address to that name.
4258 | */
4259 | add_eth_name(eth, tp->name, false0);
4260 | }
4261 |
4262 | } /* add_ether_byip */
4263 |
4264 | char *
4265 | get_ipxnet_name(wmem_allocator_t *allocator, const uint32_t addr)
4266 | {
4267 |
4268 | if (!gbl_resolv_flags.network_name) {
4269 | return ipxnet_to_str_punct(allocator, addr, '\0');
4270 | }
4271 |
4272 | return ipxnet_name_lookup(allocator, addr);
4273 |
4274 | } /* get_ipxnet_name */
4275 |
4276 | char *
4277 | get_vlan_name(wmem_allocator_t *allocator, const uint16_t id)
4278 | {
4279 |
4280 | if (!gbl_resolv_flags.vlan_name) {
4281 | return NULL((void*)0);
4282 | }
4283 |
4284 | return wmem_strdup(allocator, vlan_name_lookup(id));
4285 |
4286 | } /* get_vlan_name */
4287 |
4288 | const char *
4289 | get_manuf_name(const uint8_t *addr, size_t size)
4290 | {
4291 | hashmanuf_t *manuf_value;
4292 |
4293 | ws_return_val_if(size < 3, NULL)do { if (1 && (size < 3)) { ws_log_full("InvalidArg" , LOG_LEVEL_WARNING, "epan/addr_resolv.c", 4293, __func__, "invalid argument: %s" , "size < 3"); return (((void*)0)); } } while (0);
4294 |
4295 | manuf_value = manuf_name_lookup(addr, size);
4296 | if (gbl_resolv_flags.mac_name && ((manuf_value->flags & NAME_RESOLVED(1U<<1)) == NAME_RESOLVED(1U<<1)))
4297 | return manuf_value->resolved_name;
4298 |
4299 | return manuf_value->hexaddr;
4300 |
4301 | } /* get_manuf_name */
4302 |
4303 | const char *
4304 | tvb_get_manuf_name(tvbuff_t *tvb, unsigned offset)
4305 | {
4306 | uint8_t buf[3] = { 0 };
4307 | tvb_memcpy(tvb, buf, offset, 3);
4308 | return get_manuf_name(buf, sizeof(buf));
4309 | }
4310 |
4311 | const char *
4312 | get_manuf_name_if_known(const uint8_t *addr, size_t size)
4313 | {
4314 | hashmanuf_t *manuf_value;
4315 |
4316 | ws_return_val_if(size < 3, NULL)do { if (1 && (size < 3)) { ws_log_full("InvalidArg" , LOG_LEVEL_WARNING, "epan/addr_resolv.c", 4316, __func__, "invalid argument: %s" , "size < 3"); return (((void*)0)); } } while (0);
4317 |
4318 | manuf_value = manuf_name_lookup(addr, size);
4319 | if (manuf_value != NULL((void*)0) && ((manuf_value->flags & NAME_RESOLVED(1U<<1)) == NAME_RESOLVED(1U<<1))) {
4320 | return manuf_value->resolved_longname;
4321 | }
4322 |
4323 | if (size >= 6) {
4324 | /* Try the global manuf tables. */
4325 | const char *short_name, *long_name;
4326 | short_name = ws_manuf_lookup_str(addr, &long_name);
4327 | if (short_name != NULL((void*)0)) {
4328 | /* Found it */
4329 | return long_name;
4330 | }
4331 | }
4332 |
4333 | return NULL((void*)0);
4334 |
4335 | } /* get_manuf_name_if_known */
4336 |
4337 | const char *
4338 | uint_get_manuf_name_if_known(const uint32_t manuf_key)
4339 | {
4340 | uint8_t addr[6] = { 0 };
4341 | addr[0] = (manuf_key >> 16) & 0xFF;
4342 | addr[1] = (manuf_key >> 8) & 0xFF;
4343 | addr[2] = manuf_key & 0xFF;
4344 |
4345 | return get_manuf_name_if_known(addr, sizeof(addr));
4346 | }
4347 |
4348 | const char *
4349 | tvb_get_manuf_name_if_known(tvbuff_t *tvb, unsigned offset)
4350 | {
4351 | uint8_t buf[3] = { 0 };
4352 | tvb_memcpy(tvb, buf, offset, 3);
4353 | return get_manuf_name_if_known(buf, sizeof(buf));
4354 | }
4355 |
4356 | bool_Bool get_hash_manuf_used(hashmanuf_t* manuf)
4357 | {
4358 | return ((manuf->flags & TRIED_OR_RESOLVED_MASK((1U<<0) | (1U<<1))) == TRIED_OR_RESOLVED_MASK((1U<<0) | (1U<<1)));
4359 | }
4360 |
4361 | char* get_hash_manuf_resolved_name(hashmanuf_t* manuf)
4362 | {
4363 | return manuf->resolved_longname;
4364 | }
4365 |
4366 | const char *
4367 | get_eui64_name(const uint8_t *addr)
4368 | {
4369 | hasheui64_t *tp;
4370 | bool_Bool resolve = gbl_resolv_flags.mac_name;
4371 |
4372 | tp = eui64_name_lookup(addr, resolve);
4373 |
4374 | return resolve ? tp->resolved_name : tp->hexaddr;
4375 |
4376 | } /* get_eui64_name */
4377 |
4378 | char *
4379 | eui64_to_display(wmem_allocator_t *allocator, const uint64_t addr_eui64)
4380 | {
4381 | uint8_t addr[EUI64_ADDR_LEN8];
4382 |
4383 | phtonu64(addr, addr_eui64);
4384 |
4385 | const char *result = get_eui64_name(addr);
4386 |
4387 | return wmem_strdup(allocator, result);
4388 | } /* eui64_to_display */
4389 |
4390 | #define GHI_TIMEOUT(250 * 1000) (250 * 1000)
4391 | static void
4392 | c_ares_ghi_cb(void *arg, int status, int timeouts _U___attribute__((unused)), struct hostent *hp) {
4393 | /*
4394 | * XXX - If we wanted to be really fancy we could cache results here and
4395 | * look them up in get_host_ipaddr* below.
4396 | *
4397 | * XXX - This only gets the first host address if there's more than one.
4398 | */
4399 | async_hostent_t *ahp = (async_hostent_t *)arg;
4400 | if (status == ARES_SUCCESS && hp && ahp && hp->h_length == ahp->addr_size) {
4401 | memcpy(ahp->addrp, hp->h_addrh_addr_list[0], hp->h_length);
4402 | ahp->copied = hp->h_length;
4403 | }
4404 | }
4405 |
4406 | /* Translate a string, assumed either to be a dotted-quad IPv4 address or
4407 | * a host name, to a numeric IPv4 address. Return true if we succeed and
4408 | * set "*addrp" to that numeric IPv4 address; return false if we fail. */
4409 | bool_Bool
4410 | get_host_ipaddr(const char *host, uint32_t *addrp)
4411 | {
4412 | struct timeval tv = { 0, GHI_TIMEOUT(250 * 1000) }, *tvp;
4413 | int nfds;
4414 | fd_set rfds, wfds;
4415 | async_hostent_t ahe;
4416 |
4417 | /*
4418 | * XXX - are there places where this is used to translate something
4419 | * that's *only* supposed to be an IPv4 address, and where it
4420 | * *shouldn't* translate host names?
4421 | */
4422 | if (!ws_inet_pton4(host, addrp)) {
4423 |
4424 | /* It's not a valid dotted-quad IP address; is it a valid
4425 | * host name?
4426 | */
4427 |
4428 | /* If we're not allowed to do name resolution, don't do name
4429 | * resolution...
4430 | * XXX - What if we're allowed to do name resolution, and the name
4431 | * is in a DNS packet we've dissected or in a Name Resolution Block,
4432 | * or a user-entered manual name resolution?
4433 | */
4434 | if (!gbl_resolv_flags.network_name ||
4435 | !gbl_resolv_flags.use_external_net_name_resolver) {
4436 | return false0;
4437 | }
4438 |
4439 | if (!async_dns_initialized || name_resolve_concurrency < 1) {
4440 | return false0;
4441 | }
4442 | ahe.addr_size = (int) sizeof (struct in_addr);
4443 | ahe.copied = 0;
4444 | ahe.addrp = addrp;
4445 | ares_gethostbyname(ghbn_chan, host, AF_INET2, c_ares_ghi_cb, &ahe);
4446 | FD_ZERO(&rfds)do { unsigned int __i; fd_set *__arr = (&rfds); for (__i = 0; __i < sizeof (fd_set) / sizeof (__fd_mask); ++__i) ((__arr )->__fds_bits)[__i] = 0; } while (0);
4447 | FD_ZERO(&wfds)do { unsigned int __i; fd_set *__arr = (&wfds); for (__i = 0; __i < sizeof (fd_set) / sizeof (__fd_mask); ++__i) ((__arr )->__fds_bits)[__i] = 0; } while (0);
4448 | nfds = ares_fds(ghbn_chan, &rfds, &wfds);
4449 | if (nfds > 0) {
4450 | tvp = ares_timeout(ghbn_chan, &tv, &tv);
4451 | if (select(nfds, &rfds, &wfds, NULL((void*)0), tvp) == -1) { /* call to select() failed */
4452 | /* If it's interrupted by a signal, no need to put out a message */
4453 | if (errno(*__errno_location ()) != EINTR4)
4454 | fprintf(stderrstderr, "Warning: call to select() failed, error is %s\n", g_strerror(errno(*__errno_location ())));
4455 | return false0;
4456 | }
4457 | ares_process(ghbn_chan, &rfds, &wfds);
4458 | }
4459 | ares_cancel(ghbn_chan);
4460 | if (ahe.addr_size == ahe.copied) {
4461 | return true1;
4462 | }
4463 | return false0;
4464 | }
4465 |
4466 | return true1;
4467 | }
4468 |
4469 | /*
4470 | * Translate IPv6 numeric address or FQDN hostname into binary IPv6 address.
4471 | * Return true if we succeed and set "*addrp" to that numeric IPv6 address;
4472 | * return false if we fail.
4473 | */
4474 | bool_Bool
4475 | get_host_ipaddr6(const char *host, ws_in6_addr *addrp)
4476 | {
4477 | struct timeval tv = { 0, GHI_TIMEOUT(250 * 1000) }, *tvp;
4478 | int nfds;
4479 | fd_set rfds, wfds;
4480 | async_hostent_t ahe;
4481 |
4482 | if (str_to_ip6(host, addrp))
4483 | return true1;
4484 |
4485 | /* It's not a valid dotted-quad IP address; is it a valid
4486 | * host name?
4487 | *
4488 | * XXX - are there places where this is used to translate something
4489 | * that's *only* supposed to be an IPv6 address, and where it
4490 | * *shouldn't* translate host names?
4491 | */
4492 |
4493 | /* If we're not allowed to do name resolution, don't do name
4494 | * resolution...
4495 | * XXX - What if we're allowed to do name resolution, and the name
4496 | * is in a DNS packet we've dissected or in a Name Resolution Block,
4497 | * or a user-entered manual name resolution?
4498 | */
4499 | if (!gbl_resolv_flags.network_name ||
4500 | !gbl_resolv_flags.use_external_net_name_resolver) {
4501 | return false0;
4502 | }
4503 |
4504 | /* try FQDN */
4505 | if (!async_dns_initialized || name_resolve_concurrency < 1) {
4506 | return false0;
4507 | }
4508 | ahe.addr_size = (int) sizeof (ws_in6_addr);
4509 | ahe.copied = 0;
4510 | ahe.addrp = addrp;
4511 | ares_gethostbyname(ghbn_chan, host, AF_INET610, c_ares_ghi_cb, &ahe);
4512 | FD_ZERO(&rfds)do { unsigned int __i; fd_set *__arr = (&rfds); for (__i = 0; __i < sizeof (fd_set) / sizeof (__fd_mask); ++__i) ((__arr )->__fds_bits)[__i] = 0; } while (0);
4513 | FD_ZERO(&wfds)do { unsigned int __i; fd_set *__arr = (&wfds); for (__i = 0; __i < sizeof (fd_set) / sizeof (__fd_mask); ++__i) ((__arr )->__fds_bits)[__i] = 0; } while (0);
4514 | nfds = ares_fds(ghbn_chan, &rfds, &wfds);
4515 | if (nfds > 0) {
4516 | tvp = ares_timeout(ghbn_chan, &tv, &tv);
4517 | if (select(nfds, &rfds, &wfds, NULL((void*)0), tvp) == -1) { /* call to select() failed */
4518 | /* If it's interrupted by a signal, no need to put out a message */
4519 | if (errno(*__errno_location ()) != EINTR4)
4520 | fprintf(stderrstderr, "Warning: call to select() failed, error is %s\n", g_strerror(errno(*__errno_location ())));
4521 | return false0;
4522 | }
4523 | ares_process(ghbn_chan, &rfds, &wfds);
4524 | }
4525 | ares_cancel(ghbn_chan);
4526 | if (ahe.addr_size == ahe.copied) {
4527 | return true1;
4528 | }
4529 |
4530 | return false0;
4531 | }
4532 |
4533 | wmem_map_t *
4534 | get_manuf_hashtable(void)
4535 | {
4536 | return manuf_hashtable;
4537 | }
4538 |
4539 | wmem_map_t *
4540 | get_wka_hashtable(void)
4541 | {
4542 | return wka_hashtable;
4543 | }
4544 |
4545 | wmem_map_t *
4546 | get_eth_hashtable(void)
4547 | {
4548 | return eth_hashtable;
4549 | }
4550 |
4551 | wmem_map_t *
4552 | get_serv_port_hashtable(void)
4553 | {
4554 | return serv_port_hashtable;
4555 | }
4556 |
4557 | wmem_map_t *
4558 | get_ipxnet_hash_table(void)
4559 | {
4560 | return ipxnet_hash_table;
4561 | }
4562 |
4563 | wmem_map_t *
4564 | get_vlan_hash_table(void)
4565 | {
4566 | return vlan_hash_table;
4567 | }
4568 |
4569 | wmem_map_t *
4570 | get_ipv4_hash_table(void)
4571 | {
4572 | return ipv4_hash_table;
4573 | }
4574 |
4575 | wmem_map_t *
4576 | get_ipv6_hash_table(void)
4577 | {
4578 | return ipv6_hash_table;
4579 | }
4580 | /* Initialize all the address resolution subsystems in this file */
4581 | void
4582 | addr_resolv_init(const char* app_env_var_prefix)
4583 | {
4584 | ws_assert(addr_resolv_scope == NULL)do { if ((1) && !(addr_resolv_scope == ((void*)0))) ws_log_fatal_full ("", LOG_LEVEL_ERROR, "epan/addr_resolv.c", 4584, __func__, "assertion failed: %s" , "addr_resolv_scope == ((void*)0)"); } while (0);
2 | ← | Taking false branch | →
3 | ← | Loop condition is false. Exiting loop | →
4585 | addr_resolv_scope = wmem_allocator_new(WMEM_ALLOCATOR_BLOCK);
4586 | initialize_services(app_env_var_prefix);
4587 | initialize_ethers(app_env_var_prefix);
4588 | initialize_ipxnets(app_env_var_prefix);
4589 | initialize_vlans(app_env_var_prefix);
4590 | initialize_enterprises(app_env_var_prefix);
4591 | host_name_lookup_init(app_env_var_prefix);
4 | ← | Calling 'host_name_lookup_init' | →
4592 | initialize_tacs(app_env_var_prefix);
4593 | }
4594 |
4595 | /* Clean up all the address resolution subsystems in this file */
4596 | void
4597 | addr_resolv_cleanup(void)
4598 | {
4599 | vlan_name_lookup_cleanup();
4600 | service_name_lookup_cleanup();
4601 | ethers_cleanup();
4602 | ipx_name_lookup_cleanup();
4603 | enterprises_cleanup();
4604 | host_name_lookup_cleanup();
4605 | tac_name_lookup_cleanup();
4606 |
4607 | wmem_destroy_allocator(addr_resolv_scope);
4608 | addr_resolv_scope = NULL((void*)0);
4609 | }
4610 |
4611 | bool_Bool
4612 | str_to_ip(const char *str, void *dst)
4613 | {
4614 | return ws_inet_pton4(str, (uint32_t *)dst);
4615 | }
4616 |
4617 | bool_Bool
4618 | str_to_ip6(const char *str, void *dst)
4619 | {
4620 | return ws_inet_pton6(str, (ws_in6_addr *)dst);
4621 | }
4622 |
4623 | /*
4624 | * convert a 0-terminated string that contains an ethernet address into
4625 | * the corresponding sequence of 6 bytes
4626 | * eth_bytes is a buffer >= 6 bytes that was allocated by the caller
4627 | */
4628 | bool_Bool
4629 | str_to_eth(const char *str, uint8_t (*eth_bytes)[6])
4630 | {
4631 | ether_t eth;
4632 | unsigned mask;
4633 |
4634 | if (!parse_ether_address(str, &eth, &mask, false0))
4635 | return false0;
4636 |
4637 | if (mask == 48) {
4638 | memcpy(eth_bytes, eth.addr, 6);
4639 | }
4640 | return true1;
4641 | }
4642 |
4643 | /*
4644 | * Editor modelines - https://www.wireshark.org/tools/modelines.html
4645 | *
4646 | * Local variables:
4647 | * c-basic-offset: 4
4648 | * tab-width: 8
4649 | * indent-tabs-mode: nil
4650 | * End:
4651 | *
4652 | * vi: set shiftwidth=4 tabstop=8 expandtab:
4653 | * :indentSize=4:tabSize=8:noTabs=true:
4654 | */