### Bug Summary

File: | builds/wireshark/wireshark/epan/wslua/wslua_tvb.c
Warning: | line 1056, column 5 2nd function call argument is an uninitialized value

### Annotated Source Code

Press '?' to see keyboard shortcuts

Show analyzer invocation
clang -cc1 -cc1 -triple x86_64-pc-linux-gnu -analyze -disable-free -clear-ast-before-backend -disable-llvm-verifier -discard-value-names -main-file-name wslua_tvb.c -analyzer-checker=core -analyzer-checker=apiModeling -analyzer-checker=unix -analyzer-checker=deadcode -analyzer-checker=security.insecureAPI.UncheckedReturn -analyzer-checker=security.insecureAPI.getpw -analyzer-checker=security.insecureAPI.gets -analyzer-checker=security.insecureAPI.mktemp -analyzer-checker=security.insecureAPI.mkstemp -analyzer-checker=security.insecureAPI.vfork -analyzer-checker=nullability.NullPassedToNonnull -analyzer-checker=nullability.NullReturnedFromNonnull -analyzer-output plist -w -setup-static-analyzer -mrelocation-model pic -pic-level 2 -fhalf-no-semantic-interposition -fno-delete-null-pointer-checks -mframe-pointer=all -relaxed-aliasing -fmath-errno -ffp-contract=on -fno-rounding-math -ffloat16-excess-precision=fast -fbfloat16-excess-precision=fast -mconstructor-aliases -funwind-tables=2 -target-cpu x86-64 -tune-cpu generic -debugger-tuning=gdb -fdebug-compilation-dir=/builds/wireshark/wireshark/build -fcoverage-compilation-dir=/builds/wireshark/wireshark/build -resource-dir /usr/lib/llvm-21/lib/clang/21 -isystem /usr/include/glib-2.0 -isystem /usr/lib/x86_64-linux-gnu/glib-2.0/include -isystem /usr/include/lua5.4 -isystem /builds/wireshark/wireshark/build/epan/wslua -isystem /builds/wireshark/wireshark/epan/wslua -D G_DISABLE_DEPRECATED -D G_DISABLE_SINGLE_INCLUDES -D WS_BUILD_DLL -D WS_DEBUG -D WS_DEBUG_UTF_8 -I /builds/wireshark/wireshark/build -I /builds/wireshark/wireshark -I /builds/wireshark/wireshark/include -D _GLIBCXX_ASSERTIONS -internal-isystem /usr/lib/llvm-21/lib/clang/21/include -internal-isystem /usr/local/include -internal-isystem /usr/lib/gcc/x86_64-linux-gnu/14/../../../../x86_64-linux-gnu/include -internal-externc-isystem /usr/include/x86_64-linux-gnu -internal-externc-isystem /include -internal-externc-isystem /usr/include -fmacro-prefix-map=/builds/wireshark/wireshark/= -fmacro-prefix-map=/builds/wireshark/wireshark/build/= -fmacro-prefix-map=../= -Wno-format-nonliteral -std=gnu11 -ferror-limit 19 -fvisibility=hidden -fwrapv -fwrapv-pointer -fstrict-flex-arrays=3 -stack-protector 2 -fstack-clash-protection -fcf-protection=full -fgnuc-version=4.2.1 -fskip-odr-check-in-gmf -fexceptions -fcolor-diagnostics -analyzer-output=html -faddrsig -D__GCC_HAVE_DWARF2_CFI_ASM=1 -o /builds/wireshark/wireshark/sbout/2026-04-15-100348-3641-1 -x c /builds/wireshark/wireshark/epan/wslua/wslua_tvb.c

Keyboard shortcuts:

- Use 'j/k' keys for keyboard navigation
- Use 'Shift+S' to show/hide relevant lines
- Use '?' to toggle this window

Close
Show only relevant lines Show control flow arrows

1 | /*
2 | * wslua_tvb.c
3 | *
4 | * Wireshark's interface to the Lua Programming Language
5 | *
6 | * (c) 2006, Luis E. Garcia Ontanon <luis@ontanon.org>
7 | * (c) 2008, Balint Reczey <balint.reczey@ericsson.com>
8 | * (c) 2009, Stig Bjorlykke <stig@bjorlykke.org>
9 | * (c) 2014, Hadriel Kaplan <hadrielk@yahoo.com>
10 | *
11 | * Wireshark - Network traffic analyzer
12 | * By Gerald Combs <gerald@wireshark.org>
13 | * Copyright 1998 Gerald Combs
14 | *
15 | * SPDX-License-Identifier: GPL-2.0-or-later
16 | */
17 |
18 | #include "config.h"
19 |
20 | #include "wslua.h"
21 | #include <epan/wmem_scopes.h>
22 |
23 |
24 | /* WSLUA_MODULE Tvb Functions For Handling Packet Data */
25 |
26 |
27 | /*
28 | * Tvb & TvbRange
29 | *
30 | * a Tvb represents a tvbuff_t in Lua.
31 | * a TvbRange represents a range in a tvb (tvb,offset,length) its main purpose is to do bounds checking,
32 | * It helps, too, simplifying argument passing to Tree.
33 | *
34 | * Normally in Wireshark explicit bounds checking is unnecessary as the tvbuff
35 | * functions throw appropriate exceptions depending on why data wasn't present.
36 | * In Lua, the interaction between the exception handling in epan and Lua's error
37 | * handling, both of which use setjmp/longjmp, requires careful programming to
38 | * avoid longjmp'ing down to the stack to a location that has already exited,
39 | * particularly when Lua dissector calls are nested. TvbRange reduces the amount
40 | * of possible exceptions (and TRY/CATCH to deal with them) by doing preemptive
41 | * bounds checking - at a cost of making it impossible to support truncated
42 | * captures where captured length < reported length (#15655).
43 | *
44 | * These lua objects refer to structures in wireshark that are freed independently from Lua's garbage collector.
45 | * To avoid using pointers from Lua to Wireshark structures that are already freed, we maintain a list of the
46 | * pointers each with a marker that tracks its expiry.
47 | *
48 | * All pointers are marked as expired when the dissection of the current frame is finished or when the garbage
49 | * collector tries to free the object referring to the pointer, whichever comes first.
50 | *
51 | * All allocated memory chunks used for tracking the pointers' state are freed after marking the pointer as expired
52 | * by the garbage collector or by the end of the dissection of the current frame, whichever comes second.
53 | *
54 | * We check the expiry state of the pointer before each access.
55 | *
56 | */
57 |
58 | WSLUA_CLASS_DEFINE(Tvb,FAIL_ON_NULL_OR_EXPIRED("Tvb"))Tvb toTvb(lua_State* L, int idx) { Tvb* v = (Tvb*)lua_touserdata (L, idx); if (!v) luaL_error(L, "bad argument %d (%s expected, got %s)" , idx, "Tvb", lua_typename(L, lua_type(L, idx))); return v ? * v : ((void*)0); } Tvb checkTvb(lua_State* L, int idx) { Tvb* p ; luaL_checktype(L,idx,7); p = (Tvb*)luaL_checkudata(L, idx, "Tvb" ); if (!*p) { luaL_argerror(L,idx,"null " "Tvb"); } else if ( (*p)->expired) { luaL_argerror(L,idx,"expired " "Tvb"); }; return p ? *p : ((void*)0); } Tvb* pushTvb(lua_State* L, Tvb v) { Tvb* p; luaL_checkstack(L,2,"Unable to grow stack\n"); p = (Tvb*)lua_newuserdatauv(L,sizeof(Tvb),1); *p = v; (lua_getfield (L, (-1000000 - 1000), ("Tvb"))); lua_setmetatable(L, -2); return p; }_Bool isTvb(lua_State* L,int i) { void *p; if(!lua_isuserdata (L,i)) return 0; p = lua_touserdata(L, i); lua_getfield(L, (- 1000000 - 1000), "Tvb"); if (p == ((void*)0) || !lua_getmetatable (L, i) || !lua_rawequal(L, -1, -2)) p=((void*)0); lua_settop( L, -(2)-1); return p ? 1 : 0; } Tvb shiftTvb(lua_State* L,int i) { Tvb* p; if(!lua_isuserdata(L,i)) return ((void*)0); p = (Tvb*)lua_touserdata(L, i); lua_getfield(L, (-1000000 - 1000 ), "Tvb"); if (p == ((void*)0) || !lua_getmetatable(L, i) || ! lua_rawequal(L, -1, -2)) p=((void*)0); lua_settop(L, -(2)-1); if (p) { (lua_rotate(L, (i), -1), lua_settop(L, -(1)-1)); return *p; } else return ((void*)0);} typedef int dummyTvb;
59 | /* A <<lua_class_Tvb,`Tvb`>> represents the packet's buffer. It is passed as an argument to listeners and dissectors,
60 | and can be used to extract information (via <<lua_class_TvbRange,`TvbRange`>>) from the packet's data.
61 |
62 | To create a <<lua_class_TvbRange,`TvbRange`>> the <<lua_class_Tvb,`Tvb`>> must be called with offset and length as optional arguments;
63 | the offset defaults to 0 and the length to `tvb:captured_len()`.
64 |
65 | [WARNING]
66 | ====
67 | Tvbs are usable only by the current listener or dissector call and are destroyed
68 | as soon as the listener or dissector returns, so references to them are unusable once the function
69 | has returned.
70 | ====
71 | */
72 |
73 | static GPtrArray* outstanding_Tvb;
74 | static GPtrArray* outstanding_TvbRange;
75 |
76 | /* this is used to push Tvbs that were created brand new by wslua code */
77 | int push_wsluaTvb(lua_State* L, Tvb t) {
78 | g_ptr_array_add(outstanding_Tvb,t);
79 | pushTvb(L,t);
80 | return 1;
81 | }
82 |
83 | #define PUSH_TVBRANGE(L,t){g_ptr_array_add(outstanding_TvbRange,t);pushTvbRange(L,t);} {g_ptr_array_add(outstanding_TvbRange,t);pushTvbRange(L,t);}
84 |
85 |
86 | static void free_Tvb(Tvb tvb) {
87 | if (!tvb) return;
88 |
89 | if (!tvb->expired) {
90 | tvb->expired = true1;
91 | } else {
92 | if (tvb->need_free)
93 | tvb_free(tvb->ws_tvb);
94 | g_free(tvb);
95 | }
96 | }
97 |
98 | void clear_outstanding_Tvb(void) {
99 | while (outstanding_Tvb->len) {
100 | Tvb tvb = (Tvb)g_ptr_array_remove_index_fast(outstanding_Tvb,0);
101 | free_Tvb(tvb);
102 | }
103 | }
104 |
105 | /* this is used to push Tvbs that just point to pre-existing C-code Tvbs */
106 | Tvb* push_Tvb(lua_State* L, tvbuff_t* ws_tvb) {
107 | Tvb tvb = (Tvb)g_malloc(sizeof(struct _wslua_tvb));
108 | tvb->ws_tvb = ws_tvb;
109 | tvb->expired = false0;
110 | tvb->need_free = false0;
111 | g_ptr_array_add(outstanding_Tvb,tvb);
112 | return pushTvb(L,tvb);
113 | }
114 |
115 |
116 | WSLUA_METAMETHODstatic int Tvb__tostring(lua_State* L) {
117 | /*
118 | Convert the bytes of a <<lua_class_Tvb,`Tvb`>> into a string.
119 | This is primarily useful for debugging purposes since the string will be truncated if it is too long.
120 | */
121 | Tvb tvb = checkTvb(L,1);
122 | int len = tvb_captured_length(tvb->ws_tvb);
123 | char* str = tvb_bytes_to_str(NULL((void*)0),tvb->ws_tvb,0,len);
124 |
125 | lua_pushfstring(L, "TVB(%d) : %s", len, str);
126 |
127 | wmem_free(NULL((void*)0), str);
128 |
129 | WSLUA_RETURN(1)return (1); /* The string. */
130 | }
131 |
132 | /* Gets registered as metamethod automatically by WSLUA_REGISTER_CLASS/META */
133 | static int Tvb__gc(lua_State* L) {
134 | Tvb tvb = toTvb(L,1);
135 |
136 | free_Tvb(tvb);
137 |
138 | return 0;
139 |
140 | }
141 |
142 | WSLUA_METHODstatic int Tvb_reported_len(lua_State* L) {
143 | /* Obtain the reported length (length on the network) of a <<lua_class_Tvb,`Tvb`>>. */
144 | Tvb tvb = checkTvb(L,1);
145 |
146 | lua_pushinteger(L,tvb_reported_length(tvb->ws_tvb));
147 | WSLUA_RETURN(1)return (1); /* The reported length of the <<lua_class_Tvb,`Tvb`>>. */
148 | }
149 |
150 | WSLUA_METHODstatic int Tvb_captured_len(lua_State* L) {
151 | /* Obtain the captured length (amount saved in the capture process) of a <<lua_class_Tvb,`Tvb`>>. */
152 | Tvb tvb = checkTvb(L,1);
153 |
154 | lua_pushinteger(L,tvb_captured_length(tvb->ws_tvb));
155 | WSLUA_RETURN(1)return (1); /* The captured length of the <<lua_class_Tvb,`Tvb`>>. */
156 | }
157 |
158 | WSLUA_METHODstatic int Tvb_len(lua_State* L) {
159 | /* Obtain the captured length (amount saved in the capture process) of a <<lua_class_Tvb,`Tvb`>>.
160 | Same as captured_len; kept only for backwards compatibility */
161 | Tvb tvb = checkTvb(L,1);
162 |
163 | lua_pushinteger(L,tvb_captured_length(tvb->ws_tvb));
164 | WSLUA_RETURN(1)return (1); /* The captured length of the <<lua_class_Tvb,`Tvb`>>. */
165 | }
166 |
167 | WSLUA_METHODstatic int Tvb_reported_length_remaining(lua_State* L) {
168 | /* Obtain the reported (not captured) length of packet data to end of a <<lua_class_Tvb,`Tvb`>> or 0 if the
169 | offset is beyond the end of the <<lua_class_Tvb,`Tvb`>>. */
170 | #define WSLUA_OPTARG_Tvb_reported_length_remaining_OFFSET2 2 /* The offset (in octets) from the beginning of the <<lua_class_Tvb,`Tvb`>>. Defaults to 0. */
171 | Tvb tvb = checkTvb(L,1);
172 | int offset = (int) luaL_optinteger(L, WSLUA_OPTARG_Tvb_reported_length_remaining_OFFSET2, 0);
173 |
174 | lua_pushinteger(L,tvb_reported_length_remaining(tvb->ws_tvb, offset));
175 | WSLUA_RETURN(1)return (1); /* The remaining reported length of the <<lua_class_Tvb,`Tvb`>>. */
176 | }
177 |
178 | WSLUA_METHODstatic int Tvb_bytes(lua_State* L) {
179 | /* Obtain a <<lua_class_ByteArray,`ByteArray`>> from a <<lua_class_Tvb,`Tvb`>>. */
180 | #define WSLUA_OPTARG_Tvb_bytes_OFFSET2 2 /* The offset (in octets) from the beginning of the <<lua_class_Tvb,`Tvb`>>. Defaults to 0. */
181 | #define WSLUA_OPTARG_Tvb_bytes_LENGTH3 3 /* The length (in octets) of the range. Defaults to until the end of the <<lua_class_Tvb,`Tvb`>>. */
182 | Tvb tvb = checkTvb(L,1);
183 | GByteArray* ba;
184 | #if LUA_VERSION_NUM504 >= 503
185 | int offset = (int)luaL_optinteger(L, WSLUA_OPTARG_Tvb_bytes_OFFSET2, 0);
186 | int len = (int)luaL_optinteger(L, WSLUA_OPTARG_Tvb_bytes_LENGTH3, -1);
187 | #else
188 | int offset = luaL_optint(L, WSLUA_OPTARG_Tvb_bytes_OFFSET2, 0);
189 | int len = luaL_optint(L,WSLUA_OPTARG_Tvb_bytes_LENGTH3,-1);
190 | #endif
191 | if (tvb->expired) {
192 | luaL_error(L,"expired tvb");
193 | return 0;
194 | }
195 |
196 | /* XXX - Why is *any* negative value allowed here to mean "to the
197 | * end of the Tvb" instead of just -1 as elsewhere?
198 | */
199 | if (len < 0) {
200 | len = tvb_captured_length_remaining(tvb->ws_tvb,offset);
201 | if (len < 0) {
202 | luaL_error(L,"out of bounds");
203 | return 0;
204 | }
205 | } else if ( (unsigned)(len + offset) > tvb_captured_length(tvb->ws_tvb)) {
206 | luaL_error(L,"Range is out of bounds");
207 | return 0;
208 | }
209 |
210 | ba = g_byte_array_new();
211 | g_byte_array_append(ba, tvb_get_ptr(tvb->ws_tvb, offset, len), len);
212 | pushByteArray(L,ba);
213 |
214 | WSLUA_RETURN(1)return (1); /* The <<lua_class_ByteArray,`ByteArray`>> object or nil. */
215 | }
216 |
217 | WSLUA_METHODstatic int Tvb_offset(lua_State* L) {
218 | /* Returns the raw offset (from the beginning of the source <<lua_class_Tvb,`Tvb`>>) of a sub <<lua_class_Tvb,`Tvb`>>. */
219 | Tvb tvb = checkTvb(L,1);
220 |
221 | lua_pushinteger(L,tvb_raw_offset(tvb->ws_tvb));
222 | WSLUA_RETURN(1)return (1); /* The raw offset of the <<lua_class_Tvb,`Tvb`>>. */
223 | }
224 |
225 |
226 | #if USED_FOR_DOC_PURPOSES
227 | WSLUA_METAMETHODstatic int Tvb__call(lua_State* L) {
228 | /* Equivalent to tvb:range(...) */
229 | return 0;
230 | }
231 | #endif
232 |
233 |
234 | WSLUA_METHODstatic int Tvb_range(lua_State* L) {
235 | /* Creates a <<lua_class_TvbRange,`TvbRange`>> from this <<lua_class_Tvb,`Tvb`>>. */
236 | #define WSLUA_OPTARG_Tvb_range_OFFSET2 2 /* The offset (in octets) from the beginning of the <<lua_class_Tvb,`Tvb`>>. Defaults to 0. */
237 | #define WSLUA_OPTARG_Tvb_range_LENGTH3 3 /* The length (in octets) of the range. Defaults to -1, which specifies the remaining bytes in the <<lua_class_Tvb,`Tvb`>>. */
238 |
239 | Tvb tvb = checkTvb(L,1);
240 | int offset = (int) luaL_optinteger(L,WSLUA_OPTARG_Tvb_range_OFFSET2,0);
241 | int len = (int) luaL_optinteger(L,WSLUA_OPTARG_Tvb_range_LENGTH3,-1);
242 |
243 | if (push_TvbRange(L,tvb->ws_tvb,offset,len)) {
244 | WSLUA_RETURN(1)return (1); /* The TvbRange */
245 | }
246 |
247 | return 0;
248 | }
249 |
250 | WSLUA_METHODstatic int Tvb_raw(lua_State* L) {
251 | /* Obtain a Lua string of the binary bytes in a <<lua_class_Tvb,`Tvb`>>. */
252 | #define WSLUA_OPTARG_Tvb_raw_OFFSET2 2 /* The position of the first byte. Default is 0, or the first byte. */
253 | #define WSLUA_OPTARG_Tvb_raw_LENGTH3 3 /* The length of the segment to get. Default is -1, or the remaining bytes in the <<lua_class_Tvb,`Tvb`>>. */
254 | Tvb tvb = checkTvb(L,1);
255 | int offset = (int) luaL_optinteger(L,WSLUA_OPTARG_Tvb_raw_OFFSET2,0);
256 | int len = (int) luaL_optinteger(L,WSLUA_OPTARG_Tvb_raw_LENGTH3,-1);
257 |
258 | if (!tvb) return 0;
259 | if (tvb->expired) {
260 | luaL_error(L,"expired tvb");
261 | return 0;
262 | }
263 |
264 | if ((unsigned)offset > tvb_captured_length(tvb->ws_tvb)) {
265 | WSLUA_OPTARG_ERROR(Tvb_raw,OFFSET,"offset beyond end of Tvb"){ luaL_argerror(L,2, "Tvb_raw" ": " "offset beyond end of Tvb" ); };
266 | return 0;
267 | }
268 |
269 | if (len == -1) {
270 | len = tvb_captured_length_remaining(tvb->ws_tvb,offset);
271 | if (len < 0) {
272 | luaL_error(L,"out of bounds");
273 | return false0;
274 | }
275 | } else if ( (unsigned)(len + offset) > tvb_captured_length(tvb->ws_tvb)) {
276 | luaL_error(L,"Range is out of bounds");
277 | return false0;
278 | }
279 |
280 | lua_pushlstring(L, (const char*)tvb_get_ptr(tvb->ws_tvb, offset, len), len);
281 |
282 | WSLUA_RETURN(1)return (1); /* A Lua string of the binary bytes in the <<lua_class_Tvb,`Tvb`>>. */
283 | }
284 |
285 | WSLUA_METAMETHODstatic int Tvb__eq(lua_State* L) {
286 | /* Checks whether contents of two <<lua_class_Tvb,`Tvb`>>s are equal. */
287 | Tvb tvb_l = checkTvb(L,1);
288 | Tvb tvb_r = checkTvb(L,2);
289 |
290 | int len_l = tvb_captured_length(tvb_l->ws_tvb);
291 | int len_r = tvb_captured_length(tvb_r->ws_tvb);
292 |
293 | /* it is not an error if their ds_tvb are different... they're just not equal */
294 | if (len_l == len_r)
295 | {
296 | const uint8_t* lp = tvb_get_ptr(tvb_l->ws_tvb, 0, len_l);
297 | const uint8_t* rp = tvb_get_ptr(tvb_r->ws_tvb, 0, len_r);
298 |
299 | int ret = memcmp(lp, rp, len_l) == 0 ? 1 : 0;
300 |
301 | lua_pushboolean(L,ret);
302 | } else {
303 | lua_pushboolean(L,0);
304 | }
305 |
306 | return 1;
307 | }
308 |
309 | WSLUA_METHODSstatic const luaL_Reg Tvb_methods[] = {
310 | WSLUA_CLASS_FNREG(Tvb,bytes){ "bytes", Tvb_bytes },
311 | WSLUA_CLASS_FNREG(Tvb,range){ "range", Tvb_range },
312 | WSLUA_CLASS_FNREG(Tvb,offset){ "offset", Tvb_offset },
313 | WSLUA_CLASS_FNREG(Tvb,reported_len){ "reported_len", Tvb_reported_len },
314 | WSLUA_CLASS_FNREG(Tvb,reported_length_remaining){ "reported_length_remaining", Tvb_reported_length_remaining },
315 | WSLUA_CLASS_FNREG(Tvb,captured_len){ "captured_len", Tvb_captured_len },
316 | WSLUA_CLASS_FNREG(Tvb,len){ "len", Tvb_len },
317 | WSLUA_CLASS_FNREG(Tvb,raw){ "raw", Tvb_raw },
318 | { NULL((void*)0), NULL((void*)0) }
319 | };
320 |
321 | WSLUA_METAstatic const luaL_Reg Tvb_meta[] = {
322 | WSLUA_CLASS_MTREG(Tvb,eq){ "__" "eq", Tvb__eq },
323 | WSLUA_CLASS_MTREG(Tvb,tostring){ "__" "tostring", Tvb__tostring },
324 | {"__call", Tvb_range},
325 | { NULL((void*)0), NULL((void*)0) }
326 | };
327 |
328 | int Tvb_register(lua_State* L) {
329 | WSLUA_REGISTER_CLASS(Tvb){ const wslua_class Tvb_class = { .name = "Tvb", .class_methods = Tvb_methods, .class_meta = Tvb_meta, .instance_methods = Tvb_methods , .instance_meta = Tvb_meta, .attrs = ((void*)0) }; wslua_register_class (L, &Tvb_class); (lua_getfield(L, (-1000000 - 1000), ("Tvb" ))); lua_pushcclosure(L, (Tvb__gc), 0); lua_setfield(L, -2, "__gc" ); lua_settop(L, -(1)-1); };
330 | if (outstanding_Tvb != NULL((void*)0)) {
331 | g_ptr_array_unref(outstanding_Tvb);
332 | }
333 | outstanding_Tvb = g_ptr_array_new();
334 | return 0;
335 | }
336 |
337 |
338 |
339 |
340 | WSLUA_CLASS_DEFINE(TvbRange,FAIL_ON_NULL("TvbRange"))TvbRange toTvbRange(lua_State* L, int idx) { TvbRange* v = (TvbRange *)lua_touserdata (L, idx); if (!v) luaL_error(L, "bad argument %d (%s expected, got %s)" , idx, "TvbRange", lua_typename(L, lua_type(L, idx))); return v ? *v : ((void*)0); } TvbRange checkTvbRange(lua_State* L, int idx) { TvbRange* p; luaL_checktype(L,idx,7); p = (TvbRange*) luaL_checkudata(L, idx, "TvbRange"); if (! *p) luaL_argerror( L,idx,"null " "TvbRange"); return p ? *p : ((void*)0); } TvbRange * pushTvbRange(lua_State* L, TvbRange v) { TvbRange* p; luaL_checkstack (L,2,"Unable to grow stack\n"); p = (TvbRange*)lua_newuserdatauv (L,sizeof(TvbRange),1); *p = v; (lua_getfield(L, (-1000000 - 1000 ), ("TvbRange"))); lua_setmetatable(L, -2); return p; }_Bool isTvbRange (lua_State* L,int i) { void *p; if(!lua_isuserdata(L,i)) return 0; p = lua_touserdata(L, i); lua_getfield(L, (-1000000 - 1000 ), "TvbRange"); if (p == ((void*)0) || !lua_getmetatable(L, i ) || !lua_rawequal(L, -1, -2)) p=((void*)0); lua_settop(L, -( 2)-1); return p ? 1 : 0; } TvbRange shiftTvbRange(lua_State* L ,int i) { TvbRange* p; if(!lua_isuserdata(L,i)) return ((void *)0); p = (TvbRange*)lua_touserdata(L, i); lua_getfield(L, (- 1000000 - 1000), "TvbRange"); if (p == ((void*)0) || !lua_getmetatable (L, i) || !lua_rawequal(L, -1, -2)) p=((void*)0); lua_settop( L, -(2)-1); if (p) { (lua_rotate(L, (i), -1), lua_settop(L, - (1)-1)); return *p; } else return ((void*)0);} typedef int dummyTvbRange;
341 | /*
342 | A <<lua_class_TvbRange,`TvbRange`>> represents a usable range of a <<lua_class_Tvb,`Tvb`>> and is used to extract data from the <<lua_class_Tvb,`Tvb`>> that generated it.
343 |
344 | <<lua_class_TvbRange,`TvbRange`>>s are created by calling a <<lua_class_Tvb,`Tvb`>> (e.g. 'tvb(offset,length)').
345 | A length of -1, which is the default, means to use the bytes up to the end of the <<lua_class_Tvb,`Tvb`>>.
346 | If the <<lua_class_TvbRange,`TvbRange`>> span is outside the <<lua_class_Tvb,`Tvb`>>'s range the creation will cause a runtime error.
347 | */
348 |
349 | static void free_TvbRange(TvbRange tvbr) {
350 | if (!(tvbr && tvbr->tvb)) return;
351 |
352 | if (!tvbr->tvb->expired) {
353 | tvbr->tvb->expired = true1;
354 | } else {
355 | free_Tvb(tvbr->tvb);
356 | g_free(tvbr);
357 | }
358 | }
359 |
360 | void clear_outstanding_TvbRange(void) {
361 | while (outstanding_TvbRange->len) {
362 | TvbRange tvbr = (TvbRange)g_ptr_array_remove_index_fast(outstanding_TvbRange,0);
363 | free_TvbRange(tvbr);
364 | }
365 | }
366 |
367 |
368 | bool_Bool push_TvbRange(lua_State* L, tvbuff_t* ws_tvb, int offset, int len) {
369 | TvbRange tvbr;
370 |
371 | if (!ws_tvb) {
372 | luaL_error(L,"expired tvb");
373 | return false0;
374 | }
375 |
376 | /* XXX - What if offset is negative? In epan/tvbuff.h functions, a negative
377 | * offset means "the offset from the end of the backing tvbuff at which
378 | * the new tvbuff's data begins", but that's not done consistently in this
379 | * code when taking ranges and passing an offset. And maybe we don't want
380 | * to support negative offsets at all in the future (#20103).
381 | */
382 | if (len == -1) {
383 | len = tvb_captured_length_remaining(ws_tvb,offset);
384 | if (len < 0) {
385 | luaL_error(L,"out of bounds");
386 | return false0;
387 | }
388 | } else if (len < -1) {
389 | luaL_error(L, "negative length in tvb range");
390 | return false0;
391 | } else if ( (unsigned)(len + offset) > tvb_captured_length(ws_tvb)) {
392 | luaL_error(L,"Range is out of bounds");
393 | return false0;
394 | }
395 |
396 | tvbr = (TvbRange)g_malloc(sizeof(struct _wslua_tvbrange));
397 | tvbr->tvb = (Tvb)g_malloc(sizeof(struct _wslua_tvb));
398 | tvbr->tvb->ws_tvb = ws_tvb;
399 | tvbr->tvb->expired = false0;
400 | tvbr->tvb->need_free = false0;
401 | tvbr->offset = offset;
402 | tvbr->len = len;
403 |
404 | PUSH_TVBRANGE(L,tvbr){g_ptr_array_add(outstanding_TvbRange,tvbr);pushTvbRange(L,tvbr );};
405 |
406 | return true1;
407 | }
408 |
409 |
410 | WSLUA_METHODstatic int TvbRange_tvb(lua_State *L) {
411 | /* Creates a new <<lua_class_Tvb,`Tvb`>> from a <<lua_class_TvbRange,`TvbRange`>>. */
412 |
413 | TvbRange tvbr = checkTvbRange(L,1);
414 | Tvb tvb;
415 |
416 | if (! (tvbr && tvbr->tvb)) return 0;
417 | if (tvbr->tvb->expired) {
418 | luaL_error(L,"expired tvb");
419 | return 0;
420 | }
421 |
422 | if (tvb_bytes_exist(tvbr->tvb->ws_tvb, tvbr->offset, tvbr->len)) {
423 | tvb = (Tvb)g_malloc(sizeof(struct _wslua_tvb));
424 | tvb->expired = false0;
425 | tvb->need_free = false0;
426 | tvb->ws_tvb = tvb_new_subset_length(tvbr->tvb->ws_tvb,tvbr->offset,tvbr->len);
427 | return push_wsluaTvb(L, tvb);
428 | } else {
429 | luaL_error(L,"Out Of Bounds");
430 | return 0;
431 | }
432 | }
433 |
434 |
435 | /*
436 | * get a Blefuscuoan unsigned integer from a tvb
437 | */
438 | WSLUA_METHODstatic int TvbRange_uint(lua_State* L) {
439 | /* Get a Big Endian (network order) unsigned integer from a <<lua_class_TvbRange,`TvbRange`>>.
440 | The range must be 1-4 octets long. */
441 | TvbRange tvbr = checkTvbRange(L,1);
442 | if (!(tvbr && tvbr->tvb)) return 0;
443 | if (tvbr->tvb->expired) {
444 | luaL_error(L,"expired tvb");
445 | return 0;
446 | }
447 |
448 | switch (tvbr->len) {
449 | case 1:
450 | lua_pushinteger(L,tvb_get_uint8(tvbr->tvb->ws_tvb,tvbr->offset));
451 | return 1;
452 | case 2:
453 | lua_pushinteger(L,tvb_get_ntohs(tvbr->tvb->ws_tvb,tvbr->offset));
454 | return 1;
455 | case 3:
456 | lua_pushinteger(L,tvb_get_ntoh24(tvbr->tvb->ws_tvb,tvbr->offset));
457 | return 1;
458 | case 4:
459 | lua_pushinteger(L,tvb_get_ntohl(tvbr->tvb->ws_tvb,tvbr->offset));
460 | WSLUA_RETURN(1)return (1); /* The unsigned integer value. */
461 | default:
462 | luaL_error(L,"TvbRange:uint() does not handle %d byte integers",tvbr->len);
463 | return 0;
464 | }
465 | }
466 |
467 | /*
468 | * get a Lilliputian unsigned integer from a tvb
469 | */
470 | WSLUA_METHODstatic int TvbRange_le_uint(lua_State* L) {
471 | /* Get a Little Endian unsigned integer from a <<lua_class_TvbRange,`TvbRange`>>.
472 | The range must be 1-4 octets long. */
473 | TvbRange tvbr = checkTvbRange(L,1);
474 | if (!(tvbr && tvbr->tvb)) return 0;
475 | if (tvbr->tvb->expired) {
476 | luaL_error(L,"expired tvb");
477 | return 0;
478 | }
479 |
480 | switch (tvbr->len) {
481 | case 1:
482 | /* XXX unsigned anyway */
483 | lua_pushinteger(L,(lua_Integer)(unsigned)tvb_get_uint8(tvbr->tvb->ws_tvb,tvbr->offset));
484 | return 1;
485 | case 2:
486 | lua_pushinteger(L,tvb_get_letohs(tvbr->tvb->ws_tvb,tvbr->offset));
487 | return 1;
488 | case 3:
489 | lua_pushinteger(L,tvb_get_letoh24(tvbr->tvb->ws_tvb,tvbr->offset));
490 | return 1;
491 | case 4:
492 | lua_pushinteger(L,tvb_get_letohl(tvbr->tvb->ws_tvb,tvbr->offset));
493 | WSLUA_RETURN(1)return (1); /* The unsigned integer value */
494 | default:
495 | luaL_error(L,"TvbRange:le_uint() does not handle %d byte integers",tvbr->len);
496 | return 0;
497 | }
498 | }
499 |
500 | /*
501 | * get a Blefuscuoan unsigned 64 bit integer from a tvb
502 | */
503 | WSLUA_METHODstatic int TvbRange_uint64(lua_State* L) {
504 | /* Get a Big Endian (network order) unsigned 64 bit integer from a <<lua_class_TvbRange,`TvbRange`>>, as a <<lua_class_UInt64,`UInt64`>> object.
505 | The range must be 1-8 octets long. */
506 | TvbRange tvbr = checkTvbRange(L,1);
507 | if (!(tvbr && tvbr->tvb)) return 0;
508 | if (tvbr->tvb->expired) {
509 | luaL_error(L,"expired tvb");
510 | return 0;
511 | }
512 |
513 | switch (tvbr->len) {
514 | case 1:
515 | pushUInt64(L,tvb_get_uint8(tvbr->tvb->ws_tvb,tvbr->offset));
516 | return 1;
517 | case 2:
518 | pushUInt64(L,tvb_get_ntohs(tvbr->tvb->ws_tvb,tvbr->offset));
519 | return 1;
520 | case 3:
521 | pushUInt64(L,tvb_get_ntoh24(tvbr->tvb->ws_tvb,tvbr->offset));
522 | return 1;
523 | case 4:
524 | pushUInt64(L,tvb_get_ntohl(tvbr->tvb->ws_tvb,tvbr->offset));
525 | return 1;
526 | case 5:
527 | pushUInt64(L,tvb_get_ntoh40(tvbr->tvb->ws_tvb,tvbr->offset));
528 | return 1;
529 | case 6:
530 | pushUInt64(L,tvb_get_ntoh48(tvbr->tvb->ws_tvb,tvbr->offset));
531 | return 1;
532 | case 7:
533 | pushUInt64(L,tvb_get_ntoh56(tvbr->tvb->ws_tvb,tvbr->offset));
534 | return 1;
535 | case 8:
536 | pushUInt64(L,tvb_get_ntoh64(tvbr->tvb->ws_tvb,tvbr->offset));
537 | WSLUA_RETURN(1)return (1); /* The <<lua_class_UInt64,`UInt64`>> object. */
538 | default:
539 | luaL_error(L,"TvbRange:uint64() does not handle %d byte integers",tvbr->len);
540 | return 0;
541 | }
542 | }
543 |
544 | /*
545 | * get a Lilliputian unsigned 64 bit integer from a tvb
546 | */
547 | WSLUA_METHODstatic int TvbRange_le_uint64(lua_State* L) {
548 | /* Get a Little Endian unsigned 64 bit integer from a <<lua_class_TvbRange,`TvbRange`>>, as a <<lua_class_UInt64,`UInt64`>> object.
549 | The range must be 1-8 octets long. */
550 | TvbRange tvbr = checkTvbRange(L,1);
551 | if (!(tvbr && tvbr->tvb)) return 0;
552 | if (tvbr->tvb->expired) {
553 | luaL_error(L,"expired tvb");
554 | return 0;
555 | }
556 |
557 | switch (tvbr->len) {
558 | case 1:
559 | pushUInt64(L,tvb_get_uint8(tvbr->tvb->ws_tvb,tvbr->offset));
560 | return 1;
561 | case 2:
562 | pushUInt64(L,tvb_get_letohs(tvbr->tvb->ws_tvb,tvbr->offset));
563 | return 1;
564 | case 3:
565 | pushUInt64(L,tvb_get_letoh24(tvbr->tvb->ws_tvb,tvbr->offset));
566 | return 1;
567 | case 4:
568 | pushUInt64(L,tvb_get_letohl(tvbr->tvb->ws_tvb,tvbr->offset));
569 | return 1;
570 | case 5:
571 | pushUInt64(L,tvb_get_letoh40(tvbr->tvb->ws_tvb,tvbr->offset));
572 | return 1;
573 | case 6:
574 | pushUInt64(L,tvb_get_letoh48(tvbr->tvb->ws_tvb,tvbr->offset));
575 | return 1;
576 | case 7:
577 | pushUInt64(L,tvb_get_letoh56(tvbr->tvb->ws_tvb,tvbr->offset));
578 | return 1;
579 | case 8:
580 | pushUInt64(L,tvb_get_letoh64(tvbr->tvb->ws_tvb,tvbr->offset));
581 | WSLUA_RETURN(1)return (1); /* The <<lua_class_UInt64,`UInt64`>> object. */
582 | default:
583 | luaL_error(L,"TvbRange:le_uint64() does not handle %d byte integers",tvbr->len);
584 | return 0;
585 | }
586 | }
587 |
588 | /*
589 | * get a Blefuscuoan signed integer from a tvb
590 | */
591 | WSLUA_METHODstatic int TvbRange_int(lua_State* L) {
592 | /* Get a Big Endian (network order) signed integer from a <<lua_class_TvbRange,`TvbRange`>>.
593 | The range must be 1-4 octets long. */
594 | TvbRange tvbr = checkTvbRange(L,1);
595 | if (!(tvbr && tvbr->tvb)) return 0;
596 | if (tvbr->tvb->expired) {
597 | luaL_error(L,"expired tvb");
598 | return 0;
599 | }
600 |
601 | switch (tvbr->len) {
602 | case 1:
603 | lua_pushinteger(L,tvb_get_int8(tvbr->tvb->ws_tvb,tvbr->offset));
604 | return 1;
605 | case 2:
606 | lua_pushinteger(L,tvb_get_ntohis(tvbr->tvb->ws_tvb,tvbr->offset));
607 | return 1;
608 | case 3:
609 | lua_pushinteger(L,tvb_get_ntohi24(tvbr->tvb->ws_tvb,tvbr->offset));
610 | return 1;
611 | case 4:
612 | lua_pushinteger(L,tvb_get_ntohil(tvbr->tvb->ws_tvb,tvbr->offset));
613 | WSLUA_RETURN(1)return (1); /* The signed integer value. */
614 | /*
615 | * XXX:
616 | * lua uses double so we have 52 bits to play with
617 | * we are missing 5 and 6 byte integers within lua's range
618 | * and 64 bit integers are not supported (there's a lib for
619 | * lua that does).
620 | */
621 | default:
622 | luaL_error(L,"TvbRange:int() does not handle %d byte integers",tvbr->len);
623 | return 0;
624 | }
625 | }
626 |
627 | /*
628 | * get a Lilliputian signed integer from a tvb
629 | */
630 | WSLUA_METHODstatic int TvbRange_le_int(lua_State* L) {
631 | /* Get a Little Endian signed integer from a <<lua_class_TvbRange,`TvbRange`>>.
632 | The range must be 1-4 octets long. */
633 | TvbRange tvbr = checkTvbRange(L,1);
634 | if (!(tvbr && tvbr->tvb)) return 0;
635 | if (tvbr->tvb->expired) {
636 | luaL_error(L,"expired tvb");
637 | return 0;
638 | }
639 |
640 | switch (tvbr->len) {
641 | case 1:
642 | lua_pushinteger(L,tvb_get_int8(tvbr->tvb->ws_tvb,tvbr->offset));
643 | return 1;
644 | case 2:
645 | lua_pushinteger(L,tvb_get_letohis(tvbr->tvb->ws_tvb,tvbr->offset));
646 | return 1;
647 | case 3:
648 | lua_pushinteger(L,tvb_get_letohi24(tvbr->tvb->ws_tvb,tvbr->offset));
649 | return 1;
650 | case 4:
651 | lua_pushinteger(L,tvb_get_letohil(tvbr->tvb->ws_tvb,tvbr->offset));
652 | WSLUA_RETURN(1)return (1); /* The signed integer value. */
653 | default:
654 | luaL_error(L,"TvbRange:le_int() does not handle %d byte integers",tvbr->len);
655 | return 0;
656 | }
657 | }
658 |
659 | /*
660 | * get a Blefuscuoan signed 64 bit integer from a tvb
661 | */
662 | WSLUA_METHODstatic int TvbRange_int64(lua_State* L) {
663 | /* Get a Big Endian (network order) signed 64 bit integer from a <<lua_class_TvbRange,`TvbRange`>>, as an <<lua_class_Int64,`Int64`>> object.
664 | The range must be 1-8 octets long. */
665 | TvbRange tvbr = checkTvbRange(L,1);
666 | if (!(tvbr && tvbr->tvb)) return 0;
667 | if (tvbr->tvb->expired) {
668 | luaL_error(L,"expired tvb");
669 | return 0;
670 | }
671 |
672 | switch (tvbr->len) {
673 | case 1:
674 | pushInt64(L,tvb_get_int8(tvbr->tvb->ws_tvb,tvbr->offset));
675 | return 1;
676 | case 2:
677 | pushInt64(L,tvb_get_ntohis(tvbr->tvb->ws_tvb,tvbr->offset));
678 | return 1;
679 | case 3:
680 | pushInt64(L,tvb_get_ntohi24(tvbr->tvb->ws_tvb,tvbr->offset));
681 | return 1;
682 | case 4:
683 | pushInt64(L,tvb_get_ntohil(tvbr->tvb->ws_tvb,tvbr->offset));
684 | return 1;
685 | case 5:
686 | pushInt64(L,tvb_get_ntohi40(tvbr->tvb->ws_tvb,tvbr->offset));
687 | return 1;
688 | case 6:
689 | pushInt64(L,tvb_get_ntohi48(tvbr->tvb->ws_tvb,tvbr->offset));
690 | return 1;
691 | case 7:
692 | pushInt64(L,tvb_get_ntohi56(tvbr->tvb->ws_tvb,tvbr->offset));
693 | return 1;
694 | case 8:
695 | pushInt64(L,tvb_get_ntohi64(tvbr->tvb->ws_tvb,tvbr->offset));
696 | WSLUA_RETURN(1)return (1); /* The <<lua_class_Int64,`Int64`>> object. */
697 | default:
698 | luaL_error(L,"TvbRange:int64() does not handle %d byte integers",tvbr->len);
699 | return 0;
700 | }
701 | }
702 |
703 | /*
704 | * get a Lilliputian signed 64 bit integer from a tvb
705 | */
706 | WSLUA_METHODstatic int TvbRange_le_int64(lua_State* L) {
707 | /* Get a Little Endian signed 64 bit integer from a <<lua_class_TvbRange,`TvbRange`>>, as an <<lua_class_Int64,`Int64`>> object.
708 | The range must be 1-8 octets long. */
709 | TvbRange tvbr = checkTvbRange(L,1);
710 | if (!(tvbr && tvbr->tvb)) return 0;
711 | if (tvbr->tvb->expired) {
712 | luaL_error(L,"expired tvb");
713 | return 0;
714 | }
715 |
716 | switch (tvbr->len) {
717 | case 1:
718 | pushInt64(L,tvb_get_int8(tvbr->tvb->ws_tvb,tvbr->offset));
719 | return 1;
720 | case 2:
721 | pushInt64(L,tvb_get_letohis(tvbr->tvb->ws_tvb,tvbr->offset));
722 | return 1;
723 | case 3:
724 | pushInt64(L,tvb_get_letohi24(tvbr->tvb->ws_tvb,tvbr->offset));
725 | return 1;
726 | case 4:
727 | pushInt64(L,tvb_get_letohil(tvbr->tvb->ws_tvb,tvbr->offset));
728 | return 1;
729 | case 5:
730 | pushInt64(L,tvb_get_letohi40(tvbr->tvb->ws_tvb,tvbr->offset));
731 | return 1;
732 | case 6:
733 | pushInt64(L,tvb_get_letohi48(tvbr->tvb->ws_tvb,tvbr->offset));
734 | return 1;
735 | case 7:
736 | pushInt64(L,tvb_get_letohi56(tvbr->tvb->ws_tvb,tvbr->offset));
737 | return 1;
738 | case 8:
739 | pushInt64(L,tvb_get_letohi64(tvbr->tvb->ws_tvb,tvbr->offset));
740 | WSLUA_RETURN(1)return (1); /* The <<lua_class_Int64,`Int64`>> object. */
741 | default:
742 | luaL_error(L,"TvbRange:le_int64() does not handle %d byte integers",tvbr->len);
743 | return 0;
744 | }
745 | }
746 |
747 | /*
748 | * get a Blefuscuoan float
749 | */
750 | WSLUA_METHODstatic int TvbRange_float(lua_State* L) {
751 | /* Get a Big Endian (network order) floating point number from a <<lua_class_TvbRange,`TvbRange`>>.
752 | The range must be 4 or 8 octets long. */
753 | TvbRange tvbr = checkTvbRange(L,1);
754 | if (!(tvbr && tvbr->tvb)) return 0;
755 | if (tvbr->tvb->expired) {
756 | luaL_error(L,"expired tvb");
757 | return 0;
758 | }
759 |
760 | switch (tvbr->len) {
761 | case 4:
762 | lua_pushnumber(L,(double)tvb_get_ntohieee_float(tvbr->tvb->ws_tvb,tvbr->offset));
763 | return 1;
764 | case 8:
765 | lua_pushnumber(L,tvb_get_ntohieee_double(tvbr->tvb->ws_tvb,tvbr->offset));
766 | WSLUA_RETURN(1)return (1); /* The floating point value. */
767 | default:
768 | luaL_error(L,"TvbRange:float() does not handle %d byte floating numbers",tvbr->len);
769 | return 0;
770 | }
771 | }
772 |
773 | /*
774 | * get a Lilliputian float
775 | */
776 | WSLUA_METHODstatic int TvbRange_le_float(lua_State* L) {
777 | /* Get a Little Endian floating point number from a <<lua_class_TvbRange,`TvbRange`>>.
778 | The range must be 4 or 8 octets long. */
779 | TvbRange tvbr = checkTvbRange(L,1);
780 | if (!(tvbr && tvbr->tvb)) return 0;
781 |
782 | switch (tvbr->len) {
783 | case 4:
784 | lua_pushnumber(L,tvb_get_letohieee_float(tvbr->tvb->ws_tvb,tvbr->offset));
785 | return 1;
786 | case 8:
787 | lua_pushnumber(L,tvb_get_letohieee_double(tvbr->tvb->ws_tvb,tvbr->offset));
788 | WSLUA_RETURN(1)return (1); /* The floating point value. */
789 | default:
790 | luaL_error(L,"TvbRange:le_float() does not handle %d byte floating numbers",tvbr->len);
791 | return 0;
792 | }
793 | }
794 |
795 | WSLUA_METHODstatic int TvbRange_ipv4(lua_State* L) {
796 | /* Get an IPv4 Address from a <<lua_class_TvbRange,`TvbRange`>>, as an <<lua_class_Address,`Address`>> object. */
797 | TvbRange tvbr = checkTvbRange(L,1);
798 | Address addr;
799 |
800 | if ( !(tvbr && tvbr->tvb)) return 0;
801 | if (tvbr->tvb->expired) {
802 | luaL_error(L,"expired tvb");
803 | return 0;
804 | }
805 |
806 | if (tvbr->len != 4) {
807 | WSLUA_ERROR(TvbRange_ipv4,"The range must be 4 octets long"){ luaL_error(L, "%s%s", "TvbRange_ipv4" ": ", "The range must be 4 octets long" ); };
808 | return 0;
809 | }
810 |
811 | addr = g_new(address,1)((address *) g_malloc_n ((1), sizeof (address)));
812 | alloc_address_tvb(NULL((void*)0),addr,AT_IPv4,sizeof(uint32_t),tvbr->tvb->ws_tvb,tvbr->offset);
813 | pushAddress(L,addr);
814 |
815 | WSLUA_RETURN(1)return (1); /* The IPv4 <<lua_class_Address,`Address`>> object. */
816 | }
817 |
818 | WSLUA_METHODstatic int TvbRange_le_ipv4(lua_State* L) {
819 | /* Get an Little Endian IPv4 Address from a <<lua_class_TvbRange,`TvbRange`>>, as an <<lua_class_Address,`Address`>> object. */
820 | TvbRange tvbr = checkTvbRange(L,1);
821 | Address addr;
822 | uint32_t ip_addr;
823 |
824 | if ( !(tvbr && tvbr->tvb)) return 0;
825 | if (tvbr->tvb->expired) {
826 | luaL_error(L,"expired tvb");
827 | return 0;
828 | }
829 |
830 | if (tvbr->len != 4) {
831 | WSLUA_ERROR(TvbRange_ipv4,"The range must be 4 octets long"){ luaL_error(L, "%s%s", "TvbRange_ipv4" ": ", "The range must be 4 octets long" ); };
832 | return 0;
833 | }
834 |
835 | addr = g_new(address,1)((address *) g_malloc_n ((1), sizeof (address)));
836 | ip_addr = GUINT32_SWAP_LE_BE(tvb_get_ipv4(tvbr->tvb->ws_tvb,tvbr->offset))(((guint32) ( (((guint32) (tvb_get_ipv4(tvbr->tvb->ws_tvb ,tvbr->offset)) & (guint32) 0x000000ffU) << 24) | (((guint32) (tvb_get_ipv4(tvbr->tvb->ws_tvb,tvbr->offset )) & (guint32) 0x0000ff00U) << 8) | (((guint32) (tvb_get_ipv4 (tvbr->tvb->ws_tvb,tvbr->offset)) & (guint32) 0x00ff0000U ) >> 8) | (((guint32) (tvb_get_ipv4(tvbr->tvb->ws_tvb ,tvbr->offset)) & (guint32) 0xff000000U) >> 24)) ));
837 | alloc_address_wmem(NULL((void*)0), addr, AT_IPv4, sizeof(ip_addr), &ip_addr);
838 | pushAddress(L,addr);
839 |
840 | WSLUA_RETURN(1)return (1); /* The IPv4 <<lua_class_Address,`Address`>> object. */
841 | }
842 |
843 | WSLUA_METHODstatic int TvbRange_ipv6(lua_State* L) {
844 | /* Get an IPv6 Address from a <<lua_class_TvbRange,`TvbRange`>>, as an <<lua_class_Address,`Address`>> object. */
845 | TvbRange tvbr = checkTvbRange(L,1);
846 | Address addr;
847 |
848 | if ( !(tvbr && tvbr->tvb)) return 0;
849 | if (tvbr->tvb->expired) {
850 | luaL_error(L,"expired tvb");
851 | return 0;
852 | }
853 |
854 | if (tvbr->len != 16) {
855 | WSLUA_ERROR(TvbRange_ipv6,"The range must be 16 octets long"){ luaL_error(L, "%s%s", "TvbRange_ipv6" ": ", "The range must be 16 octets long" ); };
856 | return 0;
857 | }
858 |
859 | addr = g_new(address,1)((address *) g_malloc_n ((1), sizeof (address)));
860 | alloc_address_tvb(NULL((void*)0),addr,AT_IPv6,16,tvbr->tvb->ws_tvb,tvbr->offset);
861 | pushAddress(L,addr);
862 |
863 | WSLUA_RETURN(1)return (1); /* The IPv6 <<lua_class_Address,`Address`>> object. */
864 | }
865 |
866 | WSLUA_METHODstatic int TvbRange_ether(lua_State* L) {
867 | /* Get an Ethernet Address from a <<lua_class_TvbRange,`TvbRange`>>, as an <<lua_class_Address,`Address`>> object. */
868 | TvbRange tvbr = checkTvbRange(L,1);
869 | Address addr;
870 |
871 | if ( !(tvbr && tvbr->tvb)) return 0;
872 | if (tvbr->tvb->expired) {
873 | luaL_error(L,"expired tvb");
874 | return 0;
875 | }
876 |
877 | if (tvbr->len != 6) {
878 | WSLUA_ERROR(TvbRange_ether,"The range must be 6 bytes long"){ luaL_error(L, "%s%s", "TvbRange_ether" ": ", "The range must be 6 bytes long" ); };
879 | return 0;
880 | }
881 |
882 | addr = g_new(address,1)((address *) g_malloc_n ((1), sizeof (address)));
883 | alloc_address_tvb(NULL((void*)0),addr,AT_ETHER,6,tvbr->tvb->ws_tvb,tvbr->offset);
884 | pushAddress(L,addr);
885 |
886 | WSLUA_RETURN(1)return (1); /* The Ethernet <<lua_class_Address,`Address`>> object. */
887 | }
888 |
889 | WSLUA_METHODstatic int TvbRange_nstime(lua_State* L) {
890 | /* Obtain a time_t structure from a <<lua_class_TvbRange,`TvbRange`>>, as an <<lua_class_NSTime,`NSTime`>> object. */
891 | #define WSLUA_OPTARG_TvbRange_nstime_ENCODING2 2 /* An optional ENC_* encoding value to use */
892 | TvbRange tvbr = checkTvbRange(L,1);
893 | NSTime nstime;
894 | const unsigned encoding = (unsigned) luaL_optinteger(L, WSLUA_OPTARG_TvbRange_nstime_ENCODING2, 0);
895 |
896 | if ( !(tvbr && tvbr->tvb)) return 0;
897 | if (tvbr->tvb->expired) {
898 | luaL_error(L,"expired tvb");
899 | return 0;
900 | }
901 |
902 | if (encoding & ~ENC_STR_TIME_MASK0x001F0000) {
903 | WSLUA_OPTARG_ERROR(TvbRange_nstime, ENCODING, "invalid encoding value"){ luaL_argerror(L,2, "TvbRange_nstime" ": " "invalid encoding value" ); };
904 | return 0;
905 | }
906 |
907 | nstime = g_new(nstime_t,1)((nstime_t *) g_malloc_n ((1), sizeof (nstime_t)));
908 |
909 | if (encoding == 0) {
910 | if (tvbr->len == 4) {
911 | nstime->secs = tvb_get_ntohl(tvbr->tvb->ws_tvb, tvbr->offset);
912 | nstime->nsecs = 0;
913 | } else if (tvbr->len == 8) {
914 | nstime->secs = tvb_get_ntohl(tvbr->tvb->ws_tvb, tvbr->offset);
915 | nstime->nsecs = tvb_get_ntohl(tvbr->tvb->ws_tvb, tvbr->offset + 4);
916 | } else {
917 | g_free(nstime);
918 | WSLUA_ERROR(TvbRange_nstime,"The range must be 4 or 8 bytes long"){ luaL_error(L, "%s%s", "TvbRange_nstime" ": ", "The range must be 4 or 8 bytes long" ); };
919 | return 0;
920 | }
921 | pushNSTime(L, nstime);
922 | lua_pushinteger(L, tvbr->len);
923 | }
924 | else {
925 | unsigned endoff = 0;
926 | nstime_t *retval = tvb_get_string_time(tvbr->tvb->ws_tvb, tvbr->offset, tvbr->len,
927 | encoding, nstime, &endoff);
928 | if (!retval || endoff == 0) {
929 | g_free(nstime);
930 | /* push nil nstime and offset */
931 | lua_pushnil(L);
932 | lua_pushnil(L);
933 | }
934 | else {
935 | pushNSTime(L, nstime);
936 | lua_pushinteger(L, endoff);
937 | }
938 | }
939 |
940 | WSLUA_RETURN(2)return (2); /* The <<lua_class_NSTime,`NSTime`>> object and number of bytes used, or nil on failure. */
941 | }
942 |
943 | WSLUA_METHODstatic int TvbRange_le_nstime(lua_State* L) {
944 | /* Obtain a nstime from a <<lua_class_TvbRange,`TvbRange`>>, as an <<lua_class_NSTime,`NSTime`>> object. */
945 | TvbRange tvbr = checkTvbRange(L,1);
946 | NSTime nstime;
947 |
948 | if ( !(tvbr && tvbr->tvb)) return 0;
949 | if (tvbr->tvb->expired) {
950 | luaL_error(L,"expired tvb");
951 | return 0;
952 | }
953 |
954 | nstime = g_new(nstime_t,1)((nstime_t *) g_malloc_n ((1), sizeof (nstime_t)));
955 |
956 | if (tvbr->len == 4) {
957 | nstime->secs = tvb_get_letohl(tvbr->tvb->ws_tvb, tvbr->offset);
958 | nstime->nsecs = 0;
959 | } else if (tvbr->len == 8) {
960 | nstime->secs = tvb_get_letohl(tvbr->tvb->ws_tvb, tvbr->offset);
961 | nstime->nsecs = tvb_get_letohl(tvbr->tvb->ws_tvb, tvbr->offset + 4);
962 | } else {
963 | g_free(nstime);
964 | WSLUA_ERROR(TvbRange_nstime,"The range must be 4 or 8 bytes long"){ luaL_error(L, "%s%s", "TvbRange_nstime" ": ", "The range must be 4 or 8 bytes long" ); };
965 | return 0;
966 | }
967 |
968 | pushNSTime(L, nstime);
969 |
970 | WSLUA_RETURN(1)return (1); /* The <<lua_class_NSTime,`NSTime`>> object. */
971 | }
972 |
973 | WSLUA_METHODstatic int TvbRange_string(lua_State* L) {
974 | /* Obtain a string from a <<lua_class_TvbRange,`TvbRange`>>. */
975 | #define WSLUA_OPTARG_TvbRange_string_ENCODING2 2 /* The encoding to use. Defaults to ENC_ASCII. */
976 | TvbRange tvbr = checkTvbRange(L,1);
977 | unsigned encoding = (unsigned)luaL_optinteger(L,WSLUA_OPTARG_TvbRange_string_ENCODING2, ENC_ASCII0x00000000|ENC_NA0x00000000);
978 | char * str;
979 |
980 | if ( !(tvbr && tvbr->tvb)) return 0;
981 | if (tvbr->tvb->expired) {
982 | luaL_error(L,"expired tvb");
983 | return 0;
984 | }
985 |
986 | str = (char*)tvb_get_string_enc(NULL((void*)0),tvbr->tvb->ws_tvb,tvbr->offset,tvbr->len,encoding);
987 | lua_pushlstring(L, str, strlen(str));
988 | wmem_free(NULL((void*)0), str);
989 |
990 | WSLUA_RETURN(1)return (1); /* A string containing all bytes in the <<lua_class_TvbRange,`TvbRange`>> including all zeroes (e.g., "a\000bc\000"). */
991 | }
992 |
993 | static int TvbRange_ustring_any(lua_State* L, bool_Bool little_endian) {
994 | /* Obtain a UTF-16 encoded string from a <<lua_class_TvbRange,`TvbRange`>>. */
995 | TvbRange tvbr = checkTvbRange(L,1);
996 | char * str;
997 |
998 | if ( !(tvbr && tvbr->tvb)) return 0;
999 | if (tvbr->tvb->expired) {
1000 | luaL_error(L,"expired tvb");
1001 | return 0;
1002 | }
1003 |
1004 | str = (char*)tvb_get_string_enc(NULL((void*)0),tvbr->tvb->ws_tvb,tvbr->offset,tvbr->len,(little_endian ? ENC_UTF_160x00000004|ENC_LITTLE_ENDIAN0x80000000 : ENC_UTF_160x00000004|ENC_BIG_ENDIAN0x00000000));
1005 | lua_pushlstring(L, str, strlen(str));
1006 | wmem_free(NULL((void*)0), str);
1007 |
1008 | return 1; /* The string */
1009 | }
1010 |
1011 | WSLUA_METHODstatic int TvbRange_ustring(lua_State* L) {
1012 | /* Obtain a Big Endian (network order) UTF-16 encoded string from a <<lua_class_TvbRange,`TvbRange`>>. */
1013 | WSLUA_RETURN(TvbRange_ustring_any(L, false))return (TvbRange_ustring_any(L, 0)); /* A string containing all bytes in the <<lua_class_TvbRange,`TvbRange`>> including all zeroes (e.g., "a\000bc\000"). */
1014 | }
1015 |
1016 | WSLUA_METHODstatic int TvbRange_le_ustring(lua_State* L) {
1017 | /* Obtain a Little Endian UTF-16 encoded string from a <<lua_class_TvbRange,`TvbRange`>>. */
1018 | WSLUA_RETURN(TvbRange_ustring_any(L, true))return (TvbRange_ustring_any(L, 1)); /* A string containing all bytes in the <<lua_class_TvbRange,`TvbRange`>> including all zeroes (e.g., "a\000bc\000"). */
1019 | }
1020 |
1021 | WSLUA_METHODstatic int TvbRange_stringz(lua_State* L) {
1022 | /* Obtain a zero terminated string from a <<lua_class_TvbRange,`TvbRange`>>. */
1023 | #define WSLUA_OPTARG_TvbRange_stringz_ENCODING2 2 /* The encoding to use. Defaults to ENC_ASCII. */
1024 | TvbRange tvbr = checkTvbRange(L,1);
1025 | unsigned encoding = (unsigned)luaL_optinteger(L,WSLUA_OPTARG_TvbRange_stringz_ENCODING2, ENC_ASCII0x00000000|ENC_NA0x00000000);
1026 | char *str = NULL((void*)0);
1027 | unsigned length;
1 | 'length' declared without an initial value | →
1028 | const char* error = NULL((void*)0);
1029 |
1030 | if ( !(tvbr
1.1 | 'tvbr' is non-null
&& tvbr->tvb)) return 0;
2 | ← | Assuming the condition is false | →
3 | ← | Taking false branch | →
1031 | if (tvbr->tvb->expired) {
4 | ← | Assuming field 'expired' is false | →
5 | ← | Taking false branch | →
1032 | luaL_error(L,"expired tvb");
1033 | return 0;
1034 | }
1035 |
1036 | /* XXX - This leaks outside the length of the TvbRange to scan the entire
1037 | * underlying tvbuffer. It has always done that, but that does seem odd. */
1038 | TRY{ except_t *volatile exc; volatile int except_state = 0; static const except_id_t catch_spec[] = { { 1, 0 } }; { struct except_stacknode except_sn; struct except_catch except_ch; except_setup_try(& except_sn, &except_ch, catch_spec, 1); if (_setjmp (except_ch .except_jmp)) *(&exc) = &except_ch.except_obj; else * (&exc) = 0; if(except_state & 1) except_state |= 2; except_state &= ~1; if (except_state == 0 && exc == 0) {
6 | ← | Assuming the condition is true | →
7 | ← | Taking true branch | →
8 | ← | Taking false branch | →
1039 | str = (char*)tvb_get_stringz_enc(NULL((void*)0),tvbr->tvb->ws_tvb,tvbr->offset,&length,encoding);
1040 | } CATCH(DissectorError)if (except_state == 0 && exc != 0 && exc-> except_id.except_code == (6) && (except_state |= 1)) {
9 | ← | Taking false branch | →
10 | ← | Assuming field 'except_code' is equal to 6 | →
11 | ← | Taking true branch | →
1041 | /* Presumably an unsupported encoding */
1042 | error = lua_pushstring(L, GET_MESSAGE((exc)->except_message));
1043 | } CATCH_BOUNDS_ERRORSif (except_state == 0 && exc != 0 && (exc-> except_id.except_code == (1) || exc->except_id.except_code == (4) || exc->except_id.except_code == (3) || exc->except_id .except_code == (2) || exc->except_id.except_code == (7)) && (except_state|=1)) {
1044 | error = lua_pushstring(L, "Out of bounds");
1045 | } ENDTRYif(!(except_state&1) && exc != 0) except_rethrow( exc); except_free(except_ch.except_obj.except_dyndata); except_pop (); };};
1046 |
1047 | if (error) {
12 | ← | Assuming 'error' is null | →
13 | ← | Taking false branch | →
1048 | /* By converting the exceptions into Lua errors, we also add
1049 | * the Lua traceback. */
1050 | WSLUA_ERROR(TvbRange_stringz, lua_tostring(L, 1)){ luaL_error(L, "%s%s", "TvbRange_stringz" ": ", lua_tolstring (L, (1), ((void*)0))); };
1051 | return 0;
1052 | }
1053 |
1054 | lua_pushstring(L, str);
1055 | wmem_free(NULL((void*)0), str);
1056 | lua_pushinteger(L, length);
14 | ← | 2nd function call argument is an uninitialized value
1057 |
1058 | WSLUA_RETURN(2)return (2); /* The string containing all bytes in the <<lua_class_TvbRange,`TvbRange`>> up to the first terminating zero, and the length of that string. */
1059 | }
1060 |
1061 | WSLUA_METHODstatic int TvbRange_strsize(lua_State* L) {
1062 | /*
1063 | Find the size of a zero terminated string from a <<lua_class_TvbRange,`TvbRange`>>.
1064 | The size of the string includes the terminating zero. */
1065 | #define WSLUA_OPTARG_TvbRange_strsize_ENCODING2 2 /* The encoding to use. Defaults to ENC_ASCII. */
1066 | TvbRange tvbr = checkTvbRange(L,1);
1067 | unsigned encoding = (unsigned)luaL_optinteger(L,WSLUA_OPTARG_TvbRange_strsize_ENCODING2, ENC_ASCII0x00000000|ENC_NA0x00000000);
1068 | const char* error = NULL((void*)0);
1069 |
1070 | if ( !(tvbr && tvbr->tvb)) return 0;
1071 | if (tvbr->tvb->expired) {
1072 | luaL_error(L,"expired tvb");
1073 | return 0;
1074 | }
1075 |
1076 | /* XXX - This leaks outside the length of the TvbRange to scan the entire
1077 | * underlying tvbuffer. It has always done that, but that does seem odd. */
1078 | TRY{ except_t *volatile exc; volatile int except_state = 0; static const except_id_t catch_spec[] = { { 1, 0 } }; { struct except_stacknode except_sn; struct except_catch except_ch; except_setup_try(& except_sn, &except_ch, catch_spec, 1); if (_setjmp (except_ch .except_jmp)) *(&exc) = &except_ch.except_obj; else * (&exc) = 0; if(except_state & 1) except_state |= 2; except_state &= ~1; if (except_state == 0 && exc == 0) {
1079 | lua_pushinteger(L, tvb_strsize_enc(tvbr->tvb->ws_tvb, tvbr->offset, encoding));
1080 | } CATCH(DissectorError)if (except_state == 0 && exc != 0 && exc-> except_id.except_code == (6) && (except_state |= 1)) {
1081 | /* Presumably an unsupported encoding */
1082 | error = lua_pushstring(L, GET_MESSAGE((exc)->except_message));
1083 | } CATCH_BOUNDS_ERRORSif (except_state == 0 && exc != 0 && (exc-> except_id.except_code == (1) || exc->except_id.except_code == (4) || exc->except_id.except_code == (3) || exc->except_id .except_code == (2) || exc->except_id.except_code == (7)) && (except_state|=1)) {
1084 | error = lua_pushstring(L, "Out of bounds");
1085 | } ENDTRYif(!(except_state&1) && exc != 0) except_rethrow( exc); except_free(except_ch.except_obj.except_dyndata); except_pop (); };};
1086 |
1087 | if (error) {
1088 | /* By converting the exceptions into Lua errors, we also add
1089 | * the Lua traceback. */
1090 | WSLUA_ERROR(TvbRange_strsize, lua_tostring(L, 1)){ luaL_error(L, "%s%s", "TvbRange_strsize" ": ", lua_tolstring (L, (1), ((void*)0))); };
1091 | return 0;
1092 | }
1093 |
1094 | WSLUA_RETURN(1)return (1); /* Length of the zero terminated string. */
1095 | }
1096 |
1097 |
1098 | static int TvbRange_ustringz_any(lua_State* L, bool_Bool little_endian) {
1099 | /* Obtain a zero terminated string from a TvbRange */
1100 | unsigned count;
1101 | TvbRange tvbr = checkTvbRange(L,1);
1102 | int offset;
1103 | gunichar2 uchar;
1104 | char *str;
1105 |
1106 | if ( !(tvbr && tvbr->tvb)) return 0;
1107 | if (tvbr->tvb->expired) {
1108 | luaL_error(L,"expired tvb");
1109 | return 0;
1110 | }
1111 |
1112 | offset = tvbr->offset;
1113 | do {
1114 | if (!tvb_bytes_exist (tvbr->tvb->ws_tvb, offset, 2)) {
1115 | luaL_error(L,"out of bounds");
1116 | return 0;
1117 | }
1118 | /* Endianness doesn't matter when looking for null */
1119 | uchar = tvb_get_ntohs (tvbr->tvb->ws_tvb, offset);
1120 | offset += 2;
1121 | } while (uchar != 0);
1122 |
1123 | str = (char*)tvb_get_stringz_enc(NULL((void*)0),tvbr->tvb->ws_tvb,tvbr->offset,&count,
1124 | (little_endian ? ENC_UTF_160x00000004|ENC_LITTLE_ENDIAN0x80000000 : ENC_UTF_160x00000004|ENC_BIG_ENDIAN0x00000000));
1125 | lua_pushstring(L, str);
1126 | lua_pushinteger(L,count);
1127 | wmem_free(NULL((void*)0), str);
1128 |
1129 | return 2; /* The zero terminated string, the length found in tvbr */
1130 | }
1131 |
1132 | WSLUA_METHODstatic int TvbRange_ustringz(lua_State* L) {
1133 | /* Obtain a Big Endian (network order) UTF-16 encoded zero terminated string from a <<lua_class_TvbRange,`TvbRange`>>. */
1134 | WSLUA_RETURN(TvbRange_ustringz_any(L, false))return (TvbRange_ustringz_any(L, 0)); /* Two return values: the zero terminated string, and the length. */
1135 | }
1136 |
1137 | WSLUA_METHODstatic int TvbRange_le_ustringz(lua_State* L) {
1138 | /* Obtain a Little Endian UTF-16 encoded zero terminated string from a TvbRange */
1139 | WSLUA_RETURN(TvbRange_ustringz_any(L, true))return (TvbRange_ustringz_any(L, 1)); /* Two return values: the zero terminated string, and the length. */
1140 | }
1141 |
1142 | WSLUA_METHODstatic int TvbRange_bytes(lua_State* L) {
1143 | /* Obtain a <<lua_class_ByteArray,`ByteArray`>> from a <<lua_class_TvbRange,`TvbRange`>>.
1144 |
1145 | Starting in 1.11.4, this function also takes an optional `encoding` argument,
1146 | which can be set to `ENC_STR_HEX` to decode a hex-string from the <<lua_class_TvbRange,`TvbRange`>>
1147 | into the returned <<lua_class_ByteArray,`ByteArray`>>. The `encoding` can be bitwise-or'ed with one
1148 | or more separator encodings, such as `ENC_SEP_COLON`, to allow separators
1149 | to occur between each pair of hex characters.
1150 |
1151 | The return value also now returns the number of bytes used as a second return value.
1152 |
1153 | On failure or error, nil is returned for both return values.
1154 |
1155 | [NOTE]
1156 | ====
1157 | The encoding type of the hex string should also be set, for example
1158 | `ENC_ASCII` or `ENC_UTF_8`, along with `ENC_STR_HEX`.
1159 | ====
1160 | */
1161 | #define WSLUA_OPTARG_TvbRange_bytes_ENCODING2 2 /* An optional ENC_* encoding value to use */
1162 | TvbRange tvbr = checkTvbRange(L,1);
1163 | GByteArray* ba;
1164 | uint8_t* raw;
1165 | const unsigned encoding = (unsigned)luaL_optinteger(L, WSLUA_OPTARG_TvbRange_bytes_ENCODING2, 0);
1166 |
1167 |
1168 | if ( !(tvbr && tvbr->tvb)) return 0;
1169 | if (tvbr->tvb->expired) {
1170 | luaL_error(L,"expired tvb");
1171 | return 0;
1172 | }
1173 |
1174 | if (encoding == 0) {
1175 | ba = g_byte_array_new();
1176 | raw = (uint8_t *)tvb_memdup(NULL((void*)0),tvbr->tvb->ws_tvb,tvbr->offset,tvbr->len);
1177 | g_byte_array_append(ba,raw,tvbr->len);
1178 | wmem_free(NULL((void*)0), raw);
1179 | pushByteArray(L,ba);
1180 | lua_pushinteger(L, tvbr->len);
1181 | }
1182 | else if ((encoding & ENC_STR_HEX0x02000000) == 0) {
1183 | WSLUA_OPTARG_ERROR(TvbRange_nstime, ENCODING, "invalid encoding value"){ luaL_argerror(L,2, "TvbRange_nstime" ": " "invalid encoding value" ); };
1184 | }
1185 | else {
1186 | unsigned endoff = 0;
1187 | GByteArray* retval;
1188 |
1189 | ba = g_byte_array_new();
1190 | retval = tvb_get_string_bytes(tvbr->tvb->ws_tvb, tvbr->offset, tvbr->len,
1191 | encoding, ba, &endoff);
1192 | if (!retval || endoff == 0) {
1193 | g_byte_array_free(ba, true1);
1194 | /* push nil nstime and offset */
1195 | lua_pushnil(L);
1196 | lua_pushnil(L);
1197 | }
1198 | else {
1199 | pushByteArray(L,ba);
1200 | lua_pushinteger(L, endoff);
1201 | }
1202 | }
1203 |
1204 | WSLUA_RETURN(2)return (2); /* The <<lua_class_ByteArray,`ByteArray`>> object or nil, and number of bytes consumed or nil. */
1205 | }
1206 |
1207 | WSLUA_METHODstatic int TvbRange_bitfield(lua_State* L) {
1208 | /* Get a bitfield from a <<lua_class_TvbRange,`TvbRange`>>. */
1209 | #define WSLUA_OPTARG_TvbRange_bitfield_POSITION2 2 /* The bit offset (link:https://en.wikipedia.org/wiki/Bit_numbering#MSB_0_bit_numbering[MSB 0 bit numbering]) from the beginning of the <<lua_class_TvbRange,`TvbRange`>>. Defaults to 0. */
1210 | #define WSLUA_OPTARG_TvbRange_bitfield_LENGTH3 3 /* The length in bits of the field. Defaults to 1. */
1211 |
1212 | TvbRange tvbr = checkTvbRange(L,1);
1213 | unsigned pos = (unsigned)luaL_optinteger(L,WSLUA_OPTARG_TvbRange_bitfield_POSITION2,0);
1214 | unsigned len = (unsigned)luaL_optinteger(L,WSLUA_OPTARG_TvbRange_bitfield_LENGTH3,1);
1215 |
1216 | if (!(tvbr && tvbr->tvb)) return 0;
1217 | if (tvbr->tvb->expired) {
1218 | luaL_error(L,"expired tvb");
1219 | return 0;
1220 | }
1221 |
1222 | if ((pos+len) > (tvbr->len<<3)) {
1223 | luaL_error(L, "Requested bitfield out of range");
1224 | return 0;
1225 | }
1226 |
1227 | if (len <= 32) {
1228 | /* XXX - If LUA_INTEGER_SIZE is 4 (on Lua 5.3/5.4 it's usually 8), then
1229 | * for len == 32 an unsigned won't necessarily fit in a lua_Integer.
1230 | * Should we use a UInt64 then?
1231 | */
1232 | WRAP_NON_LUA_EXCEPTIONS({ volatile _Bool has_error = 0; { except_t *volatile exc; volatile int except_state = 0; static const except_id_t catch_spec[] = { { 1, 0 } }; { struct except_stacknode except_sn; struct except_catch except_ch; except_setup_try(&except_sn, &except_ch, catch_spec , 1); if (_setjmp (except_ch.except_jmp)) *(&exc) = & except_ch.except_obj; else *(&exc) = 0; if(except_state & 1) except_state |= 2; except_state &= ~1; if (except_state == 0 && exc == 0) { lua_pushinteger(L,tvb_get_bits32 (tvbr->tvb->ws_tvb,tvbr->offset*8 + pos, len, 0)); } if (except_state == 0 && exc != 0 && (exc-> except_id.except_code == (1) || exc->except_id.except_code == (4) || exc->except_id.except_code == (7)) && ( except_state|=1)) { show_exception(lua_tvb, lua_pinfo, lua_tree ->tree, ((exc)->except_id.except_code), ((exc)->except_message )); } if (except_state == 0 && exc != 0 && (except_state |=1)) { show_exception(lua_tvb, lua_pinfo, lua_tree->tree, ((exc)->except_id.except_code), ((exc)->except_message )); lua_pushfstring(L, "%s: %s", __func__, ((exc)->except_message ) ? ((exc)->except_message) : "Malformed packet"); has_error = 1; } if(!(except_state&1) && exc != 0) except_rethrow (exc); except_free(except_ch.except_obj.except_dyndata); except_pop (); };}; if (has_error) { lua_error(L); } }
1233 | lua_pushinteger(L,tvb_get_bits32(tvbr->tvb->ws_tvb,tvbr->offset*8 + pos, len, false));{ volatile _Bool has_error = 0; { except_t *volatile exc; volatile int except_state = 0; static const except_id_t catch_spec[] = { { 1, 0 } }; { struct except_stacknode except_sn; struct except_catch except_ch; except_setup_try(&except_sn, &except_ch, catch_spec , 1); if (_setjmp (except_ch.except_jmp)) *(&exc) = & except_ch.except_obj; else *(&exc) = 0; if(except_state & 1) except_state |= 2; except_state &= ~1; if (except_state == 0 && exc == 0) { lua_pushinteger(L,tvb_get_bits32 (tvbr->tvb->ws_tvb,tvbr->offset*8 + pos, len, 0)); } if (except_state == 0 && exc != 0 && (exc-> except_id.except_code == (1) || exc->except_id.except_code == (4) || exc->except_id.except_code == (7)) && ( except_state|=1)) { show_exception(lua_tvb, lua_pinfo, lua_tree ->tree, ((exc)->except_id.except_code), ((exc)->except_message )); } if (except_state == 0 && exc != 0 && (except_state |=1)) { show_exception(lua_tvb, lua_pinfo, lua_tree->tree, ((exc)->except_id.except_code), ((exc)->except_message )); lua_pushfstring(L, "%s: %s", __func__, ((exc)->except_message ) ? ((exc)->except_message) : "Malformed packet"); has_error = 1; } if(!(except_state&1) && exc != 0) except_rethrow (exc); except_free(except_ch.except_obj.except_dyndata); except_pop (); };}; if (has_error) { lua_error(L); } }
1234 | ){ volatile _Bool has_error = 0; { except_t *volatile exc; volatile int except_state = 0; static const except_id_t catch_spec[] = { { 1, 0 } }; { struct except_stacknode except_sn; struct except_catch except_ch; except_setup_try(&except_sn, &except_ch, catch_spec , 1); if (_setjmp (except_ch.except_jmp)) *(&exc) = & except_ch.except_obj; else *(&exc) = 0; if(except_state & 1) except_state |= 2; except_state &= ~1; if (except_state == 0 && exc == 0) { lua_pushinteger(L,tvb_get_bits32 (tvbr->tvb->ws_tvb,tvbr->offset*8 + pos, len, 0)); } if (except_state == 0 && exc != 0 && (exc-> except_id.except_code == (1) || exc->except_id.except_code == (4) || exc->except_id.except_code == (7)) && ( except_state|=1)) { show_exception(lua_tvb, lua_pinfo, lua_tree ->tree, ((exc)->except_id.except_code), ((exc)->except_message )); } if (except_state == 0 && exc != 0 && (except_state |=1)) { show_exception(lua_tvb, lua_pinfo, lua_tree->tree, ((exc)->except_id.except_code), ((exc)->except_message )); lua_pushfstring(L, "%s: %s", __func__, ((exc)->except_message ) ? ((exc)->except_message) : "Malformed packet"); has_error = 1; } if(!(except_state&1) && exc != 0) except_rethrow (exc); except_free(except_ch.except_obj.except_dyndata); except_pop (); };}; if (has_error) { lua_error(L); } }
1235 | } else if (len <= 64) {
1236 | WRAP_NON_LUA_EXCEPTIONS({ volatile _Bool has_error = 0; { except_t *volatile exc; volatile int except_state = 0; static const except_id_t catch_spec[] = { { 1, 0 } }; { struct except_stacknode except_sn; struct except_catch except_ch; except_setup_try(&except_sn, &except_ch, catch_spec , 1); if (_setjmp (except_ch.except_jmp)) *(&exc) = & except_ch.except_obj; else *(&exc) = 0; if(except_state & 1) except_state |= 2; except_state &= ~1; if (except_state == 0 && exc == 0) { pushUInt64(L,tvb_get_bits64(tvbr ->tvb->ws_tvb,tvbr->offset*8 + pos, len, 0)); } if ( except_state == 0 && exc != 0 && (exc->except_id .except_code == (1) || exc->except_id.except_code == (4) || exc->except_id.except_code == (7)) && (except_state |=1)) { show_exception(lua_tvb, lua_pinfo, lua_tree->tree, ((exc)->except_id.except_code), ((exc)->except_message )); } if (except_state == 0 && exc != 0 && (except_state |=1)) { show_exception(lua_tvb, lua_pinfo, lua_tree->tree, ((exc)->except_id.except_code), ((exc)->except_message )); lua_pushfstring(L, "%s: %s", __func__, ((exc)->except_message ) ? ((exc)->except_message) : "Malformed packet"); has_error = 1; } if(!(except_state&1) && exc != 0) except_rethrow (exc); except_free(except_ch.except_obj.except_dyndata); except_pop (); };}; if (has_error) { lua_error(L); } }
1237 | pushUInt64(L,tvb_get_bits64(tvbr->tvb->ws_tvb,tvbr->offset*8 + pos, len, false));{ volatile _Bool has_error = 0; { except_t *volatile exc; volatile int except_state = 0; static const except_id_t catch_spec[] = { { 1, 0 } }; { struct except_stacknode except_sn; struct except_catch except_ch; except_setup_try(&except_sn, &except_ch, catch_spec , 1); if (_setjmp (except_ch.except_jmp)) *(&exc) = & except_ch.except_obj; else *(&exc) = 0; if(except_state & 1) except_state |= 2; except_state &= ~1; if (except_state == 0 && exc == 0) { pushUInt64(L,tvb_get_bits64(tvbr ->tvb->ws_tvb,tvbr->offset*8 + pos, len, 0)); } if ( except_state == 0 && exc != 0 && (exc->except_id .except_code == (1) || exc->except_id.except_code == (4) || exc->except_id.except_code == (7)) && (except_state |=1)) { show_exception(lua_tvb, lua_pinfo, lua_tree->tree, ((exc)->except_id.except_code), ((exc)->except_message )); } if (except_state == 0 && exc != 0 && (except_state |=1)) { show_exception(lua_tvb, lua_pinfo, lua_tree->tree, ((exc)->except_id.except_code), ((exc)->except_message )); lua_pushfstring(L, "%s: %s", __func__, ((exc)->except_message ) ? ((exc)->except_message) : "Malformed packet"); has_error = 1; } if(!(except_state&1) && exc != 0) except_rethrow (exc); except_free(except_ch.except_obj.except_dyndata); except_pop (); };}; if (has_error) { lua_error(L); } }
1238 | ){ volatile _Bool has_error = 0; { except_t *volatile exc; volatile int except_state = 0; static const except_id_t catch_spec[] = { { 1, 0 } }; { struct except_stacknode except_sn; struct except_catch except_ch; except_setup_try(&except_sn, &except_ch, catch_spec , 1); if (_setjmp (except_ch.except_jmp)) *(&exc) = & except_ch.except_obj; else *(&exc) = 0; if(except_state & 1) except_state |= 2; except_state &= ~1; if (except_state == 0 && exc == 0) { pushUInt64(L,tvb_get_bits64(tvbr ->tvb->ws_tvb,tvbr->offset*8 + pos, len, 0)); } if ( except_state == 0 && exc != 0 && (exc->except_id .except_code == (1) || exc->except_id.except_code == (4) || exc->except_id.except_code == (7)) && (except_state |=1)) { show_exception(lua_tvb, lua_pinfo, lua_tree->tree, ((exc)->except_id.except_code), ((exc)->except_message )); } if (except_state == 0 && exc != 0 && (except_state |=1)) { show_exception(lua_tvb, lua_pinfo, lua_tree->tree, ((exc)->except_id.except_code), ((exc)->except_message )); lua_pushfstring(L, "%s: %s", __func__, ((exc)->except_message ) ? ((exc)->except_message) : "Malformed packet"); has_error = 1; } if(!(except_state&1) && exc != 0) except_rethrow (exc); except_free(except_ch.except_obj.except_dyndata); except_pop (); };}; if (has_error) { lua_error(L); } }
1239 | } else {
1240 | luaL_error(L,"TvbRange:bitfield() does not handle %d bits",len);
1241 | return 0;
1242 | }
1243 |
1244 | WSLUA_RETURN(1)return (1); /* The bitfield value */
1245 | }
1246 |
1247 | WSLUA_METHODstatic int TvbRange_range(lua_State* L) {
1248 | /* Creates a sub-<<lua_class_TvbRange,`TvbRange`>> from this <<lua_class_TvbRange,`TvbRange`>>. */
1249 | #define WSLUA_OPTARG_TvbRange_range_OFFSET2 2 /* The offset (in octets) from the beginning of the <<lua_class_TvbRange,`TvbRange`>>. Defaults to 0. */
1250 | #define WSLUA_OPTARG_TvbRange_range_LENGTH3 3 /* The length (in octets) of the range. Defaults to until the end of the <<lua_class_TvbRange,`TvbRange`>>. */
1251 |
1252 | TvbRange tvbr = checkTvbRange(L,1);
1253 | int offset = (int)luaL_optinteger(L,WSLUA_OPTARG_TvbRange_range_OFFSET2,0);
1254 | int len = (int)luaL_optinteger(L,WSLUA_OPTARG_TvbRange_range_LENGTH3,-1);
1255 |
1256 | if (!(tvbr && tvbr->tvb)) return 0;
1257 | if (tvbr->tvb->expired) {
1258 | luaL_error(L,"expired tvb");
1259 | return 0;
1260 | }
1261 |
1262 | if (offset < 0) {
1263 | WSLUA_OPTARG_ERROR(TvbRange_range,OFFSET,"offset before start of TvbRange"){ luaL_argerror(L,2, "TvbRange_range" ": " "offset before start of TvbRange" ); };
1264 | return 0;
1265 | }
1266 | if ((unsigned)offset > tvbr->len) {
1267 | WSLUA_OPTARG_ERROR(TvbRange_range,OFFSET,"offset beyond end of TvbRange"){ luaL_argerror(L,2, "TvbRange_range" ": " "offset beyond end of TvbRange" ); };
1268 | return 0;
1269 | }
1270 |
1271 | if (len == -1) {
1272 | len = tvbr->len - offset;
1273 | }
1274 | if (len < 0) {
1275 | luaL_error(L,"out of bounds");
1276 | return 0;
1277 | } else if ( (unsigned)(len + offset) > tvbr->len) {
1278 | luaL_error(L,"Range is out of bounds");
1279 | return 0;
1280 | }
1281 |
1282 | if (push_TvbRange(L,tvbr->tvb->ws_tvb,tvbr->offset+offset,len)) {
1283 | WSLUA_RETURN(1)return (1); /* The <<lua_class_TvbRange,`TvbRange`>>. */
1284 | }
1285 |
1286 | return 0;
1287 | }
1288 |
1289 | WSLUA_METHODstatic int TvbRange_uncompress_zlib(lua_State* L) {
1290 | /* Given a <<lua_class_TvbRange,`TvbRange`>> containing zlib compressed data, decompresses the data and returns a new <<lua_class_TvbRange,`TvbRange`>> containing the uncompressed data.
1291 | @since 4.3.0
1292 | */
1293 | #define WSLUA_ARG_TvbRange_uncompress_zlib_NAME2 2 /* The name to be given to the new data-source. */
1294 | TvbRange tvbr = checkTvbRange(L,1);
1295 | #if defined (HAVE_ZLIB1) || defined (HAVE_ZLIBNG)
1296 | const char* name = luaL_optstring(L,WSLUA_ARG_TvbRange_uncompress_zlib_NAME,"Uncompressed")(luaL_optlstring(L, (2), ("Uncompressed"), ((void*)0)));
1297 | tvbuff_t *uncompr_tvb;
1298 | #endif
1299 |
1300 | if (!(tvbr && tvbr->tvb)) return 0;
1301 |
1302 | if (tvbr->tvb->expired) {
1303 | luaL_error(L,"expired tvb");
1304 | return 0;
1305 | }
1306 |
1307 | #if defined (HAVE_ZLIB1) || defined (HAVE_ZLIBNG)
1308 | uncompr_tvb = tvb_child_uncompress_zlib(tvbr->tvb->ws_tvb, tvbr->tvb->ws_tvb, tvbr->offset, tvbr->len);
1309 | if (uncompr_tvb) {
1310 | add_new_data_source (lua_pinfo, uncompr_tvb, name);
1311 | if (push_TvbRange(L,uncompr_tvb,0,tvb_captured_length(uncompr_tvb))) {
1312 | WSLUA_RETURN(1)return (1); /* The <<lua_class_TvbRange,`TvbRange`>>. */
1313 | }
1314 | }
1315 | #else
1316 | luaL_error(L,"Missing support for ZLIB");
1317 | #endif
1318 |
1319 | return 0;
1320 | }
1321 |
1322 | WSLUA_METHODstatic int TvbRange_uncompress(lua_State* L) {
1323 | /* Given a <<lua_class_TvbRange,`TvbRange`>> containing zlib compressed data, decompresses the data and returns a new <<lua_class_TvbRange,`TvbRange`>> containing the uncompressed data. Deprecated; use tvbrange:uncompress_zlib() instead. */
1324 | #define WSLUA_ARG_TvbRange_uncompress_NAME2 2 /* The name to be given to the new data-source. */
1325 | return TvbRange_uncompress_zlib(L);
1326 | }
1327 |
1328 | /* Gets registered as metamethod automatically by WSLUA_REGISTER_CLASS/META */
1329 | static int TvbRange__gc(lua_State* L) {
1330 | TvbRange tvbr = checkTvbRange(L,1);
1331 |
1332 | free_TvbRange(tvbr);
1333 |
1334 | return 0;
1335 |
1336 | }
1337 |
1338 | WSLUA_METHODstatic int TvbRange_uncompress_brotli(lua_State* L) {
1339 | /* Given a <<lua_class_TvbRange,`TvbRange`>> containing Brotli compressed data, decompresses the data and returns a new <<lua_class_TvbRange,`TvbRange`>> containing the uncompressed data.
1340 | @since 4.3.0
1341 | */
1342 | #define WSLUA_ARG_TvbRange_uncompress_brotli_NAME2 2 /* The name to be given to the new data-source. */
1343 | TvbRange tvbr = checkTvbRange(L,1);
1344 | #ifdef HAVE_BROTLI1
1345 | const char* name = luaL_optstring(L,WSLUA_ARG_TvbRange_uncompress_brotli_NAME,"Uncompressed")(luaL_optlstring(L, (2), ("Uncompressed"), ((void*)0)));
1346 | tvbuff_t *uncompr_tvb;
1347 | #endif
1348 |
1349 | if (!(tvbr && tvbr->tvb)) return 0;
1350 |
1351 | if (tvbr->tvb->expired) {
1352 | luaL_error(L,"expired tvb");
1353 | return 0;
1354 | }
1355 |
1356 | #ifdef HAVE_BROTLI1
1357 | uncompr_tvb = tvb_child_uncompress_brotli(tvbr->tvb->ws_tvb, tvbr->tvb->ws_tvb, tvbr->offset, tvbr->len);
1358 | if (uncompr_tvb) {
1359 | add_new_data_source (lua_pinfo, uncompr_tvb, name);
1360 | if (push_TvbRange(L,uncompr_tvb,0,tvb_captured_length(uncompr_tvb))) {
1361 | WSLUA_RETURN(1)return (1); /* The <<lua_class_TvbRange,`TvbRange`>>. */
1362 | }
1363 | }
1364 | #else
1365 | luaL_error(L,"Missing support for Brotli");
1366 | #endif
1367 |
1368 | return 0;
1369 | }
1370 |
1371 | WSLUA_METHODstatic int TvbRange_uncompress_hpack_huff(lua_State* L) {
1372 | /* Given a <<lua_class_TvbRange,`TvbRange`>> containing data compressed using the Huffman encoding in HTTP/2 HPACK and HTTP/3 QPACK, decompresses the data and returns a new <<lua_class_TvbRange,`TvbRange`>> containing the uncompressed data.
1373 | @since 4.3.0
1374 | */
1375 | #define WSLUA_ARG_TvbRange_uncompress_hpack_huff_NAME2 2 /* The name to be given to the new data-source. */
1376 | TvbRange tvbr = checkTvbRange(L,1);
1377 | const char* name = luaL_optstring(L,WSLUA_ARG_TvbRange_uncompress_hpack_huff_NAME,"Uncompressed")(luaL_optlstring(L, (2), ("Uncompressed"), ((void*)0)));
1378 | tvbuff_t *uncompr_tvb;
1379 |
1380 | if (!(tvbr && tvbr->tvb)) return 0;
1381 |
1382 | if (tvbr->tvb->expired) {
1383 | luaL_error(L,"expired tvb");
1384 | return 0;
1385 | }
1386 |
1387 | uncompr_tvb = tvb_child_uncompress_hpack_huff(tvbr->tvb->ws_tvb, tvbr->offset, tvbr->len);
1388 | if (uncompr_tvb) {
1389 | add_new_data_source (lua_pinfo, uncompr_tvb, name);
1390 | if (push_TvbRange(L,uncompr_tvb,0,tvb_captured_length(uncompr_tvb))) {
1391 | WSLUA_RETURN(1)return (1); /* The <<lua_class_TvbRange,`TvbRange`>>. */
1392 | }
1393 | }
1394 |
1395 | return 0;
1396 | }
1397 |
1398 | WSLUA_METHODstatic int TvbRange_uncompress_lz77(lua_State* L) {
1399 | /* Given a <<lua_class_TvbRange,`TvbRange`>> containing Microsoft Plain LZ77 compressed data, decompresses the data and returns a new <<lua_class_TvbRange,`TvbRange`>> containing the uncompressed data.
1400 | @since 4.3.0
1401 | */
1402 | #define WSLUA_ARG_TvbRange_uncompress_lz77_NAME2 2 /* The name to be given to the new data-source. */
1403 | TvbRange tvbr = checkTvbRange(L,1);
1404 | const char* name = luaL_optstring(L,WSLUA_ARG_TvbRange_uncompress_lz77_NAME,"Uncompressed")(luaL_optlstring(L, (2), ("Uncompressed"), ((void*)0)));
1405 | tvbuff_t *uncompr_tvb;
1406 |
1407 | if (!(tvbr && tvbr->tvb)) return 0;
1408 |
1409 | if (tvbr->tvb->expired) {
1410 | luaL_error(L,"expired tvb");
1411 | return 0;
1412 | }
1413 |
1414 | uncompr_tvb = tvb_child_uncompress_lz77(tvbr->tvb->ws_tvb, tvbr->tvb->ws_tvb, tvbr->offset, tvbr->len);
1415 | if (uncompr_tvb) {
1416 | add_new_data_source (lua_pinfo, uncompr_tvb, name);
1417 | if (push_TvbRange(L,uncompr_tvb,0,tvb_captured_length(uncompr_tvb))) {
1418 | WSLUA_RETURN(1)return (1); /* The <<lua_class_TvbRange,`TvbRange`>>. */
1419 | }
1420 | }
1421 |
1422 | return 0;
1423 | }
1424 |
1425 | WSLUA_METHODstatic int TvbRange_uncompress_lz77huff(lua_State* L) {
1426 | /* Given a <<lua_class_TvbRange,`TvbRange`>> containing Microsoft LZ77+Huffman compressed data, decompresses the data and returns a new <<lua_class_TvbRange,`TvbRange`>> containing the uncompressed data.
1427 | @since 4.3.0
1428 | */
1429 | #define WSLUA_ARG_TvbRange_uncompress_lz77huff_NAME2 2 /* The name to be given to the new data-source. */
1430 | TvbRange tvbr = checkTvbRange(L,1);
1431 | const char* name = luaL_optstring(L,WSLUA_ARG_TvbRange_uncompress_lz77huff_NAME,"Uncompressed")(luaL_optlstring(L, (2), ("Uncompressed"), ((void*)0)));
1432 | tvbuff_t *uncompr_tvb;
1433 |
1434 | if (!(tvbr && tvbr->tvb)) return 0;
1435 |
1436 | if (tvbr->tvb->expired) {
1437 | luaL_error(L,"expired tvb");
1438 | return 0;
1439 | }
1440 |
1441 | uncompr_tvb = tvb_child_uncompress_lz77huff(tvbr->tvb->ws_tvb, tvbr->tvb->ws_tvb, tvbr->offset, tvbr->len);
1442 | if (uncompr_tvb) {
1443 | add_new_data_source (lua_pinfo, uncompr_tvb, name);
1444 | if (push_TvbRange(L,uncompr_tvb,0,tvb_captured_length(uncompr_tvb))) {
1445 | WSLUA_RETURN(1)return (1); /* The <<lua_class_TvbRange,`TvbRange`>>. */
1446 | }
1447 | }
1448 |
1449 | return 0;
1450 | }
1451 |
1452 | WSLUA_METHODstatic int TvbRange_uncompress_lznt1(lua_State* L) {
1453 | /* Given a <<lua_class_TvbRange,`TvbRange`>> containing Microsoft LZNT1 compressed data, decompresses the data and returns a new <<lua_class_TvbRange,`TvbRange`>> containing the uncompressed data.
1454 | @since 4.3.0
1455 | */
1456 | #define WSLUA_ARG_TvbRange_uncompress_lznt1_NAME2 2 /* The name to be given to the new data-source. */
1457 | TvbRange tvbr = checkTvbRange(L,1);
1458 | const char* name = luaL_optstring(L,WSLUA_ARG_TvbRange_uncompress_lznt1_NAME,"Uncompressed")(luaL_optlstring(L, (2), ("Uncompressed"), ((void*)0)));
1459 | tvbuff_t *uncompr_tvb;
1460 |
1461 | if (!(tvbr && tvbr->tvb)) return 0;
1462 |
1463 | if (tvbr->tvb->expired) {
1464 | luaL_error(L,"expired tvb");
1465 | return 0;
1466 | }
1467 |
1468 | uncompr_tvb = tvb_child_uncompress_lznt1(tvbr->tvb->ws_tvb, tvbr->tvb->ws_tvb, tvbr->offset, tvbr->len);
1469 | if (uncompr_tvb) {
1470 | add_new_data_source (lua_pinfo, uncompr_tvb, name);
1471 | if (push_TvbRange(L,uncompr_tvb,0,tvb_captured_length(uncompr_tvb))) {
1472 | WSLUA_RETURN(1)return (1); /* The <<lua_class_TvbRange,`TvbRange`>>. */
1473 | }
1474 | }
1475 |
1476 | return 0;
1477 | }
1478 |
1479 | WSLUA_METHODstatic int TvbRange_uncompress_snappy(lua_State* L) {
1480 | /* Given a <<lua_class_TvbRange,`TvbRange`>> containing Snappy compressed data, decompresses the data and returns a new <<lua_class_TvbRange,`TvbRange`>> containing the uncompressed data.
1481 | @since 4.3.0
1482 | */
1483 | #define WSLUA_ARG_TvbRange_uncompress_snappy_NAME2 2 /* The name to be given to the new data-source. */
1484 | TvbRange tvbr = checkTvbRange(L,1);
1485 | #ifdef HAVE_SNAPPY1
1486 | const char* name = luaL_optstring(L,WSLUA_ARG_TvbRange_uncompress_snappy_NAME,"Uncompressed")(luaL_optlstring(L, (2), ("Uncompressed"), ((void*)0)));
1487 | tvbuff_t *uncompr_tvb;
1488 | #endif
1489 |
1490 | if (!(tvbr && tvbr->tvb)) return 0;
1491 |
1492 | if (tvbr->tvb->expired) {
1493 | luaL_error(L,"expired tvb");
1494 | return 0;
1495 | }
1496 |
1497 | #ifdef HAVE_SNAPPY1
1498 | uncompr_tvb = tvb_child_uncompress_snappy(tvbr->tvb->ws_tvb, tvbr->tvb->ws_tvb, tvbr->offset, tvbr->len);
1499 | if (uncompr_tvb) {
1500 | add_new_data_source (lua_pinfo, uncompr_tvb, name);
1501 | if (push_TvbRange(L,uncompr_tvb,0,tvb_captured_length(uncompr_tvb))) {
1502 | WSLUA_RETURN(1)return (1); /* The <<lua_class_TvbRange,`TvbRange`>>. */
1503 | }
1504 | }
1505 | #else
1506 | luaL_error(L,"Missing support for Snappy");
1507 | #endif
1508 |
1509 | return 0;
1510 | }
1511 |
1512 | WSLUA_METHODstatic int TvbRange_uncompress_zstd(lua_State* L) {
1513 | /* Given a <<lua_class_TvbRange,`TvbRange`>> containing Zstandard compressed data, decompresses the data and returns a new <<lua_class_TvbRange,`TvbRange`>> containing the uncompressed data.
1514 | @since 4.3.0
1515 | */
1516 | #define WSLUA_ARG_TvbRange_uncompress_zstd_NAME2 2 /* The name to be given to the new data-source. */
1517 | TvbRange tvbr = checkTvbRange(L,1);
1518 | #ifdef HAVE_ZSTD1
1519 | const char* name = luaL_optstring(L,WSLUA_ARG_TvbRange_uncompress_zstd_NAME,"Uncompressed")(luaL_optlstring(L, (2), ("Uncompressed"), ((void*)0)));
1520 | tvbuff_t *uncompr_tvb;
1521 | #endif
1522 |
1523 | if (!(tvbr && tvbr->tvb)) return 0;
1524 |
1525 | if (tvbr->tvb->expired) {
1526 | luaL_error(L,"expired tvb");
1527 | return 0;
1528 | }
1529 |
1530 | #ifdef HAVE_ZSTD1
1531 | uncompr_tvb = tvb_child_uncompress_zstd(tvbr->tvb->ws_tvb, tvbr->tvb->ws_tvb, tvbr->offset, tvbr->len);
1532 | if (uncompr_tvb) {
1533 | add_new_data_source (lua_pinfo, uncompr_tvb, name);
1534 | if (push_TvbRange(L,uncompr_tvb,0,tvb_captured_length(uncompr_tvb))) {
1535 | WSLUA_RETURN(1)return (1); /* The <<lua_class_TvbRange,`TvbRange`>>. */
1536 | }
1537 | }
1538 | #else
1539 | luaL_error(L,"Missing support for ZStandard");
1540 | #endif
1541 |
1542 | return 0;
1543 | }
1544 |
1545 | WSLUA_METHODstatic int TvbRange_decode_base64(lua_State* L) {
1546 | /* Given a <<lua_class_TvbRange,`TvbRange`>> containing Base64 encoded data, return a new <<lua_class_TvbRange,`TvbRange`>> containing the decoded data.
1547 | @since 4.3.0
1548 | */
1549 | #define WSLUA_ARG_TvbRange_decode_base64_NAME2 2 /* The name to be given to the new data-source. */
1550 | TvbRange tvbr = checkTvbRange(L,1);
1551 | const char* name = luaL_optstring(L,WSLUA_ARG_TvbRange_decode_base64_NAME,"Decoded")(luaL_optlstring(L, (2), ("Decoded"), ((void*)0)));
1552 | tvbuff_t *decoded_tvb;
1553 |
1554 | if (!(tvbr && tvbr->tvb)) return 0;
1555 |
1556 | if (tvbr->tvb->expired) {
1557 | luaL_error(L,"expired tvb");
1558 | return 0;
1559 | }
1560 |
1561 | decoded_tvb = base64_tvb_to_new_tvb(tvbr->tvb->ws_tvb, tvbr->offset, tvbr->len);
1562 | if (decoded_tvb) {
1563 | add_new_data_source (lua_pinfo, decoded_tvb, name);
1564 | if (push_TvbRange(L,decoded_tvb,0,tvb_captured_length(decoded_tvb))) {
1565 | WSLUA_RETURN(1)return (1); /* The <<lua_class_TvbRange,`TvbRange`>>. */
1566 | }
1567 | }
1568 |
1569 | return 0;
1570 | }
1571 |
1572 | WSLUA_METHODstatic int TvbRange_decode_base64url(lua_State* L) {
1573 | /* Given a <<lua_class_TvbRange,`TvbRange`>> containing base64url encoded data, return a new <<lua_class_TvbRange,`TvbRange`>> containing the decoded data.
1574 | @since 4.3.0
1575 | */
1576 | #define WSLUA_ARG_TvbRange_decode_base64url_NAME2 2 /* The name to be given to the new data-source. */
1577 | TvbRange tvbr = checkTvbRange(L,1);
1578 | const char* name = luaL_optstring(L,WSLUA_ARG_TvbRange_decode_base64url_NAME,"Decoded")(luaL_optlstring(L, (2), ("Decoded"), ((void*)0)));
1579 | tvbuff_t *decoded_tvb;
1580 |
1581 | if (!(tvbr && tvbr->tvb)) return 0;
1582 |
1583 | if (tvbr->tvb->expired) {
1584 | luaL_error(L,"expired tvb");
1585 | return 0;
1586 | }
1587 |
1588 | decoded_tvb = base64uri_tvb_to_new_tvb(tvbr->tvb->ws_tvb, tvbr->offset, tvbr->len);
1589 | if (decoded_tvb) {
1590 | add_new_data_source (lua_pinfo, decoded_tvb, name);
1591 | if (push_TvbRange(L,decoded_tvb,0,tvb_captured_length(decoded_tvb))) {
1592 | WSLUA_RETURN(1)return (1); /* The <<lua_class_TvbRange,`TvbRange`>>. */
1593 | }
1594 | }
1595 |
1596 | return 0;
1597 | }
1598 |
1599 | WSLUA_METHODstatic int TvbRange_len(lua_State* L) {
1600 | /* Obtain the length of a <<lua_class_TvbRange,`TvbRange`>>. */
1601 | TvbRange tvbr = checkTvbRange(L,1);
1602 |
1603 | if (!(tvbr && tvbr->tvb)) return 0;
1604 | if (tvbr->tvb->expired) {
1605 | luaL_error(L,"expired tvb");
1606 | return 0;
1607 | }
1608 | lua_pushinteger(L,(lua_Integer)tvbr->len);
1609 | return 1;
1610 | }
1611 |
1612 | WSLUA_METHODstatic int TvbRange_offset(lua_State* L) {
1613 | /* Obtain the offset in a <<lua_class_TvbRange,`TvbRange`>>. */
1614 | TvbRange tvbr = checkTvbRange(L,1);
1615 |
1616 | if (!(tvbr && tvbr->tvb)) return 0;
1617 | if (tvbr->tvb->expired) {
1618 | luaL_error(L,"expired tvb");
1619 | return 0;
1620 | }
1621 | lua_pushinteger(L,(lua_Integer)tvbr->offset);
1622 | return 1;
1623 | }
1624 |
1625 | WSLUA_METHODstatic int TvbRange_raw(lua_State* L) {
1626 | /* Obtain a Lua string of the binary bytes in a <<lua_class_TvbRange,`TvbRange`>>. */
1627 | #define WSLUA_OPTARG_TvbRange_raw_OFFSET2 2 /* The position of the first byte within the range. Default is 0, or first byte. */
1628 | #define WSLUA_OPTARG_TvbRange_raw_LENGTH3 3 /* The length of the segment to get. Default is -1, or the remaining bytes in the range. */
1629 | TvbRange tvbr = checkTvbRange(L,1);
1630 | int offset = (int)luaL_optinteger(L,WSLUA_OPTARG_TvbRange_raw_OFFSET2,0);
1631 | int len = (int)luaL_optinteger(L,WSLUA_OPTARG_TvbRange_raw_LENGTH3,-1);
1632 |
1633 | if (!tvbr || !tvbr->tvb) return 0;
1634 | if (tvbr->tvb->expired) {
1635 | luaL_error(L,"expired tvb");
1636 | return 0;
1637 | }
1638 |
1639 | if (offset < 0) {
1640 | WSLUA_OPTARG_ERROR(TvbRange_raw,OFFSET,"offset before start of TvbRange"){ luaL_argerror(L,2, "TvbRange_raw" ": " "offset before start of TvbRange" ); };
1641 | return 0;
1642 | }
1643 | if ((unsigned)offset > tvbr->len) {
1644 | WSLUA_OPTARG_ERROR(TvbRange_raw,OFFSET,"offset beyond end of TvbRange"){ luaL_argerror(L,2, "TvbRange_raw" ": " "offset beyond end of TvbRange" ); };
1645 | return 0;
1646 | }
1647 |
1648 | if (len == -1) {
1649 | len = tvbr->len - offset;
1650 | }
1651 | if (len < 0) {
1652 | luaL_error(L,"out of bounds");
1653 | return false0;
1654 | } else if ( (unsigned)(len + offset) > tvbr->len) {
1655 | luaL_error(L,"Range is out of bounds");
1656 | return false0;
1657 | }
1658 |
1659 | lua_pushlstring(L, (const char*)tvb_get_ptr(tvbr->tvb->ws_tvb, tvbr->offset+offset, len), len);
1660 |
1661 | WSLUA_RETURN(1)return (1); /* A Lua string of the binary bytes in the <<lua_class_TvbRange,`TvbRange`>>. */
1662 | }
1663 |
1664 | WSLUA_METAMETHODstatic int TvbRange__eq(lua_State* L) {
1665 | /* Checks whether the contents of two <<lua_class_TvbRange,`TvbRange`>>s are equal. */
1666 | TvbRange tvb_l = checkTvbRange(L,1);
1667 | TvbRange tvb_r = checkTvbRange(L,2);
1668 |
1669 | /* it is not an error if their ds_tvb are different... they're just not equal */
1670 | if (tvb_l->len == tvb_r->len &&
1671 | tvb_l->len <= tvb_captured_length_remaining(tvb_l->tvb->ws_tvb, tvb_l->offset) &&
1672 | tvb_r->len <= tvb_captured_length_remaining(tvb_r->tvb->ws_tvb, tvb_r->offset))
1673 | {
1674 | const char* lp = (const char*)tvb_get_ptr(tvb_l->tvb->ws_tvb, tvb_l->offset, tvb_l->len);
1675 | const char* rp = (const char*)tvb_get_ptr(tvb_r->tvb->ws_tvb, tvb_r->offset, tvb_r->len);
1676 | unsigned i = 0;
1677 |
1678 | for (; i < tvb_r->len; ++i) {
1679 | if (lp[i] != rp[i]) {
1680 | lua_pushboolean(L,0);
1681 | return 1;
1682 | }
1683 | }
1684 | lua_pushboolean(L,1);
1685 | } else {
1686 | lua_pushboolean(L,0);
1687 | }
1688 |
1689 | return 1;
1690 | }
1691 |
1692 | WSLUA_METAMETHODstatic int TvbRange__tostring(lua_State* L) {
1693 | /*
1694 | Converts the <<lua_class_TvbRange,`TvbRange`>> into a string.
1695 | The string can be truncated, so this is primarily useful for debugging or in cases where truncation is preferred, e.g. "67:89:AB:...".
1696 | */
1697 | TvbRange tvbr = checkTvbRange(L,1);
1698 | char* str = NULL((void*)0);
1699 |
1700 | if (!(tvbr && tvbr->tvb)) return 0;
1701 | if (tvbr->tvb->expired) {
1702 | luaL_error(L,"expired tvb");
1703 | return 0;
1704 | }
1705 |
1706 | if (tvbr->len == 0) {
1707 | lua_pushstring(L, "<EMPTY>");
1708 | } else {
1709 | str = tvb_bytes_to_str(NULL((void*)0),tvbr->tvb->ws_tvb,tvbr->offset,tvbr->len);
1710 | lua_pushstring(L,str);
1711 | wmem_free(NULL((void*)0), str);
1712 | }
1713 |
1714 | WSLUA_RETURN(1)return (1); /* A Lua hex string of the <<lua_class_TvbRange,`TvbRange`>> truncated to 24 bytes. */
1715 | }
1716 |
1717 | WSLUA_METHODSstatic const luaL_Reg TvbRange_methods[] = {
1718 | WSLUA_CLASS_FNREG(TvbRange,uint){ "uint", TvbRange_uint },
1719 | WSLUA_CLASS_FNREG(TvbRange,le_uint){ "le_uint", TvbRange_le_uint },
1720 | WSLUA_CLASS_FNREG(TvbRange,int){ "int", TvbRange_int },
1721 | WSLUA_CLASS_FNREG(TvbRange,le_int){ "le_int", TvbRange_le_int },
1722 | WSLUA_CLASS_FNREG(TvbRange,uint64){ "uint64", TvbRange_uint64 },
1723 | WSLUA_CLASS_FNREG(TvbRange,le_uint64){ "le_uint64", TvbRange_le_uint64 },
1724 | WSLUA_CLASS_FNREG(TvbRange,int64){ "int64", TvbRange_int64 },
1725 | WSLUA_CLASS_FNREG(TvbRange,le_int64){ "le_int64", TvbRange_le_int64 },
1726 | WSLUA_CLASS_FNREG(TvbRange,float){ "float", TvbRange_float },
1727 | WSLUA_CLASS_FNREG(TvbRange,le_float){ "le_float", TvbRange_le_float },
1728 | WSLUA_CLASS_FNREG(TvbRange,ether){ "ether", TvbRange_ether },
1729 | WSLUA_CLASS_FNREG(TvbRange,ipv4){ "ipv4", TvbRange_ipv4 },
1730 | WSLUA_CLASS_FNREG(TvbRange,le_ipv4){ "le_ipv4", TvbRange_le_ipv4 },
1731 | WSLUA_CLASS_FNREG(TvbRange,ipv6){ "ipv6", TvbRange_ipv6 },
1732 | WSLUA_CLASS_FNREG(TvbRange,nstime){ "nstime", TvbRange_nstime },
1733 | WSLUA_CLASS_FNREG(TvbRange,le_nstime){ "le_nstime", TvbRange_le_nstime },
1734 | WSLUA_CLASS_FNREG(TvbRange,string){ "string", TvbRange_string },
1735 | WSLUA_CLASS_FNREG(TvbRange,stringz){ "stringz", TvbRange_stringz },
1736 | WSLUA_CLASS_FNREG(TvbRange,strsize){ "strsize", TvbRange_strsize },
1737 | WSLUA_CLASS_FNREG(TvbRange,bytes){ "bytes", TvbRange_bytes },
1738 | WSLUA_CLASS_FNREG(TvbRange,bitfield){ "bitfield", TvbRange_bitfield },
1739 | WSLUA_CLASS_FNREG(TvbRange,range){ "range", TvbRange_range },
1740 | WSLUA_CLASS_FNREG(TvbRange,len){ "len", TvbRange_len },
1741 | WSLUA_CLASS_FNREG(TvbRange,offset){ "offset", TvbRange_offset },
1742 | WSLUA_CLASS_FNREG(TvbRange,tvb){ "tvb", TvbRange_tvb },
1743 | WSLUA_CLASS_FNREG(TvbRange,le_ustring){ "le_ustring", TvbRange_le_ustring },
1744 | WSLUA_CLASS_FNREG(TvbRange,ustring){ "ustring", TvbRange_ustring },
1745 | WSLUA_CLASS_FNREG(TvbRange,le_ustringz){ "le_ustringz", TvbRange_le_ustringz },
1746 | WSLUA_CLASS_FNREG(TvbRange,ustringz){ "ustringz", TvbRange_ustringz },
1747 | WSLUA_CLASS_FNREG(TvbRange,uncompress){ "uncompress", TvbRange_uncompress },
1748 | WSLUA_CLASS_FNREG(TvbRange,uncompress_zlib){ "uncompress_zlib", TvbRange_uncompress_zlib },
1749 | WSLUA_CLASS_FNREG(TvbRange,uncompress_brotli){ "uncompress_brotli", TvbRange_uncompress_brotli },
1750 | WSLUA_CLASS_FNREG(TvbRange,uncompress_hpack_huff){ "uncompress_hpack_huff", TvbRange_uncompress_hpack_huff },
1751 | WSLUA_CLASS_FNREG(TvbRange,uncompress_lz77){ "uncompress_lz77", TvbRange_uncompress_lz77 },
1752 | WSLUA_CLASS_FNREG(TvbRange,uncompress_lz77huff){ "uncompress_lz77huff", TvbRange_uncompress_lz77huff },
1753 | WSLUA_CLASS_FNREG(TvbRange,uncompress_lznt1){ "uncompress_lznt1", TvbRange_uncompress_lznt1 },
1754 | WSLUA_CLASS_FNREG(TvbRange,uncompress_snappy){ "uncompress_snappy", TvbRange_uncompress_snappy },
1755 | WSLUA_CLASS_FNREG(TvbRange,uncompress_zstd){ "uncompress_zstd", TvbRange_uncompress_zstd },
1756 | WSLUA_CLASS_FNREG(TvbRange,decode_base64){ "decode_base64", TvbRange_decode_base64 },
1757 | WSLUA_CLASS_FNREG(TvbRange,decode_base64url){ "decode_base64url", TvbRange_decode_base64url },
1758 | WSLUA_CLASS_FNREG(TvbRange,raw){ "raw", TvbRange_raw },
1759 | { NULL((void*)0), NULL((void*)0) }
1760 | };
1761 |
1762 | WSLUA_METAstatic const luaL_Reg TvbRange_meta[] = {
1763 | WSLUA_CLASS_MTREG(TvbRange,tostring){ "__" "tostring", TvbRange__tostring },
1764 | WSLUA_CLASS_MTREG(wslua,concat){ "__" "concat", wslua__concat },
1765 | WSLUA_CLASS_MTREG(TvbRange,eq){ "__" "eq", TvbRange__eq },
1766 | {"__call", TvbRange_range},
1767 | { NULL((void*)0), NULL((void*)0) }
1768 | };
1769 |
1770 | int TvbRange_register(lua_State* L) {
1771 | if (outstanding_TvbRange != NULL((void*)0)) {
1772 | g_ptr_array_unref(outstanding_TvbRange);
1773 | }
1774 | outstanding_TvbRange = g_ptr_array_new();
1775 | WSLUA_REGISTER_CLASS(TvbRange){ const wslua_class TvbRange_class = { .name = "TvbRange", .class_methods = TvbRange_methods, .class_meta = TvbRange_meta, .instance_methods = TvbRange_methods, .instance_meta = TvbRange_meta, .attrs = ((void*)0) }; wslua_register_class(L, &TvbRange_class); ( lua_getfield(L, (-1000000 - 1000), ("TvbRange"))); lua_pushcclosure (L, (TvbRange__gc), 0); lua_setfield(L, -2, "__gc"); lua_settop (L, -(1)-1); };
1776 | return 0;
1777 | }
1778 |
1779 | /*
1780 | * Editor modelines - https://www.wireshark.org/tools/modelines.html
1781 | *
1782 | * Local variables:
1783 | * c-basic-offset: 4
1784 | * tab-width: 8
1785 | * indent-tabs-mode: nil
1786 | * End:
1787 | *
1788 | * vi: set shiftwidth=4 tabstop=8 expandtab:
1789 | * :indentSize=4:tabSize=8:noTabs=true:
1790 | */