Bug Summary

File:builds/wireshark/wireshark/epan/dissectors/packet-msgpack.c
Warning:line 207, column 12
1st function call argument is an uninitialized value

Annotated Source Code

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clang -cc1 -cc1 -triple x86_64-pc-linux-gnu -analyze -disable-free -clear-ast-before-backend -disable-llvm-verifier -discard-value-names -main-file-name packet-msgpack.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-18/lib/clang/18 -isystem /usr/include/glib-2.0 -isystem /usr/lib/x86_64-linux-gnu/glib-2.0/include -isystem /usr/include/mit-krb5 -isystem /usr/include/libxml2 -isystem /builds/wireshark/wireshark/build/epan/dissectors -isystem /builds/wireshark/wireshark/epan/dissectors -isystem /builds/wireshark/wireshark/epan -D G_DISABLE_DEPRECATED -D G_DISABLE_SINGLE_INCLUDES -D WS_BUILD_DLL -D WS_DEBUG -D WS_DEBUG_UTF_8 -I /builds/wireshark/wireshark/build -I /builds/wireshark/wireshark -I /builds/wireshark/wireshark/include -D _GLIBCXX_ASSERTIONS -internal-isystem /usr/lib/llvm-18/lib/clang/18/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-truncation -Wno-format-nonliteral -Wno-pointer-sign -std=gnu11 -ferror-limit 19 -fvisibility=hidden -fwrapv -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 -dwarf-debug-flags /usr/lib/llvm-18/bin/clang -### --analyze -x c -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 -isystem /usr/include/glib-2.0 -isystem /usr/lib/x86_64-linux-gnu/glib-2.0/include -isystem /usr/include/mit-krb5 -isystem /usr/include/libxml2 -isystem /builds/wireshark/wireshark/build/epan/dissectors -isystem /builds/wireshark/wireshark/epan/dissectors -isystem /builds/wireshark/wireshark/epan -fvisibility=hidden -fexcess-precision=fast -fstrict-flex-arrays=3 -fstack-clash-protection -fcf-protection=full -D _GLIBCXX_ASSERTIONS -fstack-protector-strong -fno-delete-null-pointer-checks -fno-strict-overflow -fno-strict-aliasing -fexceptions -Wno-format-truncation -Wno-format-nonliteral -fdiagnostics-color=always -Wno-pointer-sign -fmacro-prefix-map=/builds/wireshark/wireshark/= -fmacro-prefix-map=/builds/wireshark/wireshark/build/= -fmacro-prefix-map=../= -std=gnu11 -fPIC /builds/wireshark/wireshark/epan/dissectors/packet-msgpack.c -o /builds/wireshark/wireshark/sbout/2025-05-09-100252-3825-1 -Xclang -analyzer-output=html -faddrsig -D__GCC_HAVE_DWARF2_CFI_ASM=1 -o /builds/wireshark/wireshark/sbout/2025-05-09-100252-3825-1 -x c /builds/wireshark/wireshark/epan/dissectors/packet-msgpack.c
1/* packet-msgpack.c
2 *
3 * Routines for MsgPack dissection
4 * References:
5 * https://github.com/msgpack/msgpack/blob/master/spec.md
6 *
7 * Copyright 2018, Dario Lombardo <lomato@gmail.com>
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 <wsutil/array.h>
19#include <epan/packet.h>
20#include <epan/expert.h>
21#include <epan/to_str.h>
22
23
24
25void proto_register_msgpack(void);
26void proto_reg_handoff_msgpack(void);
27
28dissector_handle_t msgpack_handle;
29
30static int proto_msgpack;
31
32static int hf_msgpack_string;
33static int hf_msgpack_bin;
34static int hf_msgpack_type;
35static int hf_msgpack_string_len;
36static int hf_msgpack_bin_len;
37static int hf_msgpack_uint_fix;
38static int hf_msgpack_uint_8;
39static int hf_msgpack_uint_16;
40static int hf_msgpack_uint_32;
41static int hf_msgpack_uint_64;
42static int hf_msgpack_int_fix;
43static int hf_msgpack_int_8;
44static int hf_msgpack_int_16;
45static int hf_msgpack_int_32;
46static int hf_msgpack_int_64;
47static int hf_msgpack_bool;
48static int hf_msgpack_float;
49static int hf_msgpack_double;
50static int hf_msgpack_ext_type;
51static int hf_msgpack_ext_len;
52static int hf_msgpack_ext_bytes;
53
54static int ett_msgpack;
55static int ett_msgpack_num;
56static int ett_msgpack_string;
57static int ett_msgpack_bin;
58static int ett_msgpack_array;
59static int ett_msgpack_map;
60static int ett_msgpack_map_elem;
61static int ett_msgpack_ext;
62
63static expert_field ei_msgpack_unsupported;
64
65/* names and ranges from https://github.com/msgpack/msgpack/blob/master/spec.md#formats */
66static const range_string msgpack_types[] = {
67 {0x00, 0x7F, "positive fixint"},
68 {0x80, 0x8F, "fixmap"},
69 {0x90, 0x9F, "fixarray"},
70 {0xA0, 0xBF, "fixstr"},
71 {0xC0, 0xC0, "nil"},
72 {0xC1, 0xC1, "(never used)"},
73 {0xC2, 0xC2, "false"},
74 {0xC3, 0xC3, "true"},
75 {0xC4, 0xC4, "bin 8"},
76 {0xC5, 0xC5, "bin 16"},
77 {0xC6, 0xC6, "bin 32"},
78 {0xC7, 0xC7, "ext 8"},
79 {0xC8, 0xC8, "ext 16"},
80 {0xC9, 0xC9, "ext 32"},
81 {0xCA, 0xCA, "float 32"},
82 {0xCB, 0xCB, "flost 64"},
83 {0xCC, 0xCC, "uint 8"},
84 {0xCD, 0xCD, "uint 16"},
85 {0xCE, 0xCE, "uint 32"},
86 {0xCF, 0xCF, "uint 64"},
87 {0xD0, 0xD0, "int 8"},
88 {0xD1, 0xD1, "int 16"},
89 {0xD2, 0xD2, "int 32"},
90 {0xD3, 0xD3, "int 64"},
91 {0xD4, 0xD4, "fixext 1"},
92 {0xD5, 0xD5, "fixext 2"},
93 {0xD6, 0xD6, "fixext 4"},
94 {0xD7, 0xD7, "fixext 8"},
95 {0xD8, 0xD8, "fixext 16"},
96 {0xD9, 0xD9, "str 8"},
97 {0xDA, 0xDA, "str 16"},
98 {0xDB, 0xDB, "str 32"},
99 {0xDC, 0xDC, "array 16"},
100 {0xDD, 0xDD, "array 32"},
101 {0xDE, 0xDE, "map 16"},
102 {0xDF, 0xDF, "map 32"},
103 {0xE0, 0xFF, "negative fixint"},
104 {0x00, 0x00, NULL((void*)0)}
105};
106
107static void dissect_msgpack_object(tvbuff_t* tvb, packet_info* pinfo, proto_tree* tree, void* data, int* offset, char** value);
108
109static void dissect_msgpack_integer(tvbuff_t* tvb, packet_info *pinfo, proto_tree* tree, uint8_t type, void* data, int* offset, char** value)
110{
111 uint8_t uint8;
112 uint16_t uint16;
113 uint32_t uint32;
114 uint64_t uint64;
115 int8_t int8;
116 int16_t int16;
117 int32_t int32;
118 int64_t int64;
119 char* label;
120 proto_tree* subtree;
121 proto_item* ti;
7
'ti' declared without an initial value
122 int t_offset = *offset;
123
124 label = (data ? (char*)data : "MsgPack Integer");
8
Assuming 'data' is null
9
'?' condition is false
125
126 if (type >> 7 == 0) {
10
Assuming the condition is false
11
Taking false branch
127 ti = proto_tree_add_uint_format(tree, hf_msgpack_uint_fix, tvb, *offset, 1, type, "%s: %u", label, type);
128 subtree = proto_item_add_subtree(ti, ett_msgpack_num);
129 proto_tree_add_item(subtree, hf_msgpack_type, tvb, *offset, 1, ENC_NA0x00000000);
130
131 if (value)
132 *value = wmem_strdup_printf(pinfo->pool, "%u", type);
133 *offset += 1;
134 return;
135 }
136
137 if (type >> 5 == 7) {
12
Assuming the condition is false
13
Taking false branch
138 int8_t stype = (int8_t)type;
139 ti = proto_tree_add_int_format(tree, hf_msgpack_int_fix, tvb, *offset, 1, stype, "%s: %d", label, stype);
140 subtree = proto_item_add_subtree(ti, ett_msgpack_num);
141 proto_tree_add_item(subtree, hf_msgpack_type, tvb, *offset, 1, ENC_NA0x00000000);
142
143 if (value)
144 *value = wmem_strdup_printf(pinfo->pool, "%d", stype);
145 *offset += 1;
146 return;
147 }
148
149 switch (type) {
150 case 0xcc:
151 uint8 = tvb_get_uint8(tvb, *offset + 1);
152 ti = proto_tree_add_uint_format(tree, hf_msgpack_uint_8, tvb, *offset, 2, uint8, "%s: %u", label, uint8);
153 if (value)
154 *value = wmem_strdup_printf(pinfo->pool, "%u", uint8);
155 *offset += 2;
156 break;
157 case 0xcd:
158 uint16 = tvb_get_ntohs(tvb, *offset + 1);
159 ti = proto_tree_add_uint_format(tree, hf_msgpack_uint_16, tvb, *offset, 3, uint16, "%s: %u", label, uint16);
160 if (value)
161 *value = wmem_strdup_printf(pinfo->pool, "%u", uint16);
162 *offset += 3;
163 break;
164 case 0xce:
165 uint32 = tvb_get_ntohl(tvb, *offset + 1);
166 ti = proto_tree_add_uint_format(tree, hf_msgpack_uint_32, tvb, *offset, 5, uint32, "%s: %u", label, uint32);
167 if (value)
168 *value = wmem_strdup_printf(pinfo->pool, "%u", uint32);
169 *offset += 5;
170 break;
171 case 0xcf:
172 uint64 = tvb_get_ntoh64(tvb, *offset + 1);
173 ti = proto_tree_add_uint64_format(tree, hf_msgpack_uint_64, tvb, *offset, 9, uint64, "%s: %" PRIu64"l" "u", label, uint64);
174 if (value)
175 *value = wmem_strdup_printf(pinfo->pool, "%" PRIu64"l" "u", uint64);
176 *offset += 9;
177 break;
178 case 0xd0:
179 int8 = tvb_get_int8(tvb, *offset + 1);
180 ti = proto_tree_add_int_format(tree, hf_msgpack_int_8, tvb, *offset, 2, int8, "%s: %d", label, int8);
181 if (value)
182 *value = wmem_strdup_printf(pinfo->pool, "%d", int8);
183 *offset += 2;
184 break;
185 case 0xd1:
186 int16 = tvb_get_ntohs(tvb, *offset + 1);
187 ti = proto_tree_add_int_format(tree, hf_msgpack_int_16, tvb, *offset, 3, int16, "%s: %d", label, int16);
188 if (value)
189 *value = wmem_strdup_printf(pinfo->pool, "%d", int16);
190 *offset += 3;
191 break;
192 case 0xd2:
193 int32 = tvb_get_ntohl(tvb, *offset + 1);
194 ti = proto_tree_add_int_format(tree, hf_msgpack_int_32, tvb, *offset, 5, int32, "%s: %d", label, int32);
195 if (value)
196 *value = wmem_strdup_printf(pinfo->pool, "%d", int32);
197 *offset += 5;
198 break;
199 case 0xd3:
200 int64 = tvb_get_ntoh64(tvb, *offset + 1);
201 ti = proto_tree_add_int64_format(tree, hf_msgpack_int_64, tvb, *offset, 9, int64, "%s: %" PRId64"l" "d", label, int64);
202 if (value)
203 *value = wmem_strdup_printf(pinfo->pool, "%" PRId64"l" "d", int64);
204 *offset += 9;
205 break;
206 }
207 subtree = proto_item_add_subtree(ti, ett_msgpack_num);
14
'Default' branch taken. Execution continues on line 207
15
1st function call argument is an uninitialized value
208 proto_tree_add_item(subtree, hf_msgpack_type, tvb, t_offset, 1, ENC_NA0x00000000);
209}
210
211// NOLINTNEXTLINE(misc-no-recursion)
212static void dissect_msgpack_map(tvbuff_t* tvb, packet_info* pinfo, proto_tree* tree, uint8_t type, void* data, int* offset, char** value)
213{
214 proto_tree* subtree;
215 proto_tree* map_subtree;
216 proto_item* ti;
217 uint32_t len = 0;
218 uint8_t lensize = 0;
219 char* label;
220 unsigned i;
221
222 if (type >> 4 == 0x8) {
223 len = type & 0x0F;
224 lensize = 0;
225 }
226 else if (type == 0xde) {
227 len = tvb_get_ntohs(tvb, *offset + 1);
228 lensize = 2;
229 }
230 else if (type == 0xdf) {
231 len = tvb_get_ntohl(tvb, *offset + 1);
232 lensize = 4;
233 }
234
235 label = wmem_strdup_printf(pinfo->pool, "%s: %u element%s", data ? (char*)data : "MsgPack Map", len, len > 1 ? "s" : "");
236
237 ti = proto_tree_add_string_format(tree, hf_msgpack_string, tvb, *offset, 1 + lensize, NULL((void*)0), "%s", label);
238 subtree = proto_item_add_subtree(ti, ett_msgpack_map);
239 proto_tree_add_item(subtree, hf_msgpack_type, tvb, *offset, 1, ENC_NA0x00000000);
240 *offset += lensize + 1;
241 for (i = 0; i < len; i++) {
242 // We recurse here, but we'll run out of packet before we run out of stack.
243 map_subtree = proto_tree_add_subtree(subtree, tvb, *offset, 0, ett_msgpack_map_elem, NULL((void*)0), "");
244 dissect_msgpack_object(tvb, pinfo, map_subtree, "Key", offset, value);
245 if (value)
246 proto_item_append_text(map_subtree, " %s:", *value);
247 dissect_msgpack_object(tvb, pinfo, map_subtree, "Value", offset, value);
248 if (value)
249 proto_item_append_text(map_subtree, " %s", *value);
250 }
251
252 if (value)
253 *value = label;
254}
255
256// NOLINTNEXTLINE(misc-no-recursion)
257static void dissect_msgpack_array(tvbuff_t* tvb, packet_info* pinfo, proto_tree* tree, uint8_t type, void* data, int* offset, char** value)
258{
259 proto_tree* subtree;
260 proto_item* ti;
261 uint32_t len = 0;
262 uint8_t lensize = 0;
263 char* label;
264 unsigned i;
265
266 if (type >> 4 == 0x9) {
267 len = type & 0x0F;
268 lensize = 0;
269 }
270 else if (type == 0xdc) {
271 len = tvb_get_ntohs(tvb, *offset + 1);
272 lensize = 2;
273 }
274 else if (type == 0xdd) {
275 len = tvb_get_ntohl(tvb, *offset + 1);
276 lensize = 4;
277 }
278
279 label = wmem_strdup_printf(pinfo->pool, "%s %u element%s", data ? (char*)data : "MsgPack Array", len, len > 1 ? "s" : "");
280
281 ti = proto_tree_add_string_format(tree, hf_msgpack_string, tvb, *offset, 1 + lensize, NULL((void*)0), "%s", label);
282 subtree = proto_item_add_subtree(ti, ett_msgpack_array);
283 proto_tree_add_item(subtree, hf_msgpack_type, tvb, *offset, 1, ENC_NA0x00000000);
284 *offset += lensize + 1;
285 for (i = 0; i < len; i++) {
286 // We recurse here, but we'll run out of packet before we run out of stack.
287 dissect_msgpack_object(tvb, pinfo, subtree, data, offset, value);
288 }
289
290 if (value)
291 *value = label;
292}
293
294static void dissect_msgpack_string(tvbuff_t* tvb, packet_info* pinfo, proto_tree* tree, int type, void* data, int* offset, char** value)
295{
296 uint32_t len = 0;
297 uint8_t lensize = 0;
298 char* label;
299 proto_item* ti;
300 proto_tree* subtree;
301 char* lvalue;
302
303 if (type >> 5 == 0x5) {
304 len = type & 0x1F;
305 lensize = 0;
306 }
307 else if (type == 0xd9) {
308 len = tvb_get_uint8(tvb, *offset + 1);
309 lensize = 1;
310 }
311 else if (type == 0xda) {
312 len = tvb_get_ntohs(tvb, *offset + 1);
313 lensize = 2;
314 }
315 else if (type == 0xdb) {
316 len = tvb_get_ntohl(tvb, *offset + 1);
317 lensize = 4;
318 }
319
320 lvalue = (char*)tvb_get_string_enc(pinfo->pool, tvb, *offset + 1 + lensize, len, ENC_UTF_80x00000002);
321 label = (data ? (char*)data : "MsgPack String");
322
323 ti = proto_tree_add_string_format(tree, hf_msgpack_string, tvb, *offset, 1 + lensize + len, lvalue, "%s: %s", label, lvalue);
324 subtree = proto_item_add_subtree(ti, ett_msgpack_string);
325 proto_tree_add_item(subtree, hf_msgpack_type, tvb, *offset, 1, ENC_NA0x00000000);
326
327 if (lensize == 0) {
328 proto_tree_add_uint(subtree, hf_msgpack_string_len, tvb, *offset, 1, len);
329 *offset += 1;
330 }
331 else {
332 *offset += 1;
333 proto_tree_add_item(subtree, hf_msgpack_string_len, tvb, *offset, lensize, ENC_BIG_ENDIAN0x00000000);
334 *offset += lensize;
335 }
336 proto_tree_add_item(subtree, hf_msgpack_string, tvb, *offset, len, ENC_UTF_80x00000002);
337 *offset += len;
338
339 if (value)
340 *value = lvalue;
341}
342
343static void dissect_msgpack_bin(tvbuff_t* tvb, packet_info* pinfo, proto_tree* tree, int type, void* data, int* offset, char** value)
344{
345 uint32_t len = 0;
346 uint8_t lensize = 0;
347 char* label;
348 proto_item* ti;
349 proto_tree* subtree;
350 char* lvalue;
351
352 switch (type) {
353 case 0xc4:
354 len = tvb_get_uint8(tvb, *offset + 1);
355 lensize = 1;
356 break;
357 case 0xc5:
358 len = tvb_get_ntohs(tvb, *offset + 1);
359 lensize = 2;
360 break;
361 case 0xc6:
362 len = tvb_get_ntohl(tvb, *offset + 1);
363 lensize = 4;
364 break;
365 }
366
367 lvalue = (char*)tvb_bytes_to_str(pinfo->pool, tvb, *offset + 1 + lensize, len);
368 label = (data ? (char*)data : "MsgPack Bytes");
369
370 ti = proto_tree_add_bytes_format(tree, hf_msgpack_bin, tvb, *offset, 1 + lensize + len, lvalue, "%s: %s", label, lvalue);
371 subtree = proto_item_add_subtree(ti, ett_msgpack_bin);
372 proto_tree_add_item(subtree, hf_msgpack_type, tvb, *offset, 1, ENC_NA0x00000000);
373
374 *offset += 1;
375 proto_tree_add_item(subtree, hf_msgpack_bin_len, tvb, *offset, lensize, ENC_BIG_ENDIAN0x00000000);
376 *offset += lensize;
377
378 proto_tree_add_item(subtree, hf_msgpack_bin, tvb, *offset, len, ENC_NA0x00000000);
379 *offset += len;
380
381 if (value)
382 *value = lvalue;
383}
384
385static void dissect_msgpack_float(tvbuff_t* tvb, packet_info *pinfo, proto_tree* tree, int type, void* data, int* offset, char** value)
386{
387 char* label;
388 char* lvalue;
389 proto_item* ti;
390 proto_tree* subtree;
391 int s_offset = *offset;
392
393 *offset += 1;
394
395 if (type == 0xca) {
396 label = (data ? (char*)data : "MsgPack Float");
397 float f = tvb_get_ntohieee_float(tvb, *offset);
398 lvalue = wmem_strdup_printf(pinfo->pool, "%f", f);
399 ti = proto_tree_add_float_format(tree, hf_msgpack_float, tvb, *offset, 4, f, "%s: %f", label, f);
400 if (value)
401 *value = lvalue;
402 *offset += 4;
403 } else {
404 label = (data ? (char*)data : "MsgPack Double");
405 double d = tvb_get_ntohieee_double(tvb, *offset);
406 lvalue = wmem_strdup_printf(pinfo->pool, "%lf", d);
407 ti = proto_tree_add_double_format(tree, hf_msgpack_double, tvb, *offset, 8, d, "%s: %lf", label, d);
408 if (value)
409 *value = lvalue;
410 *offset += 8;
411 }
412 subtree = proto_item_add_subtree(ti, ett_msgpack_num);
413 proto_tree_add_item(subtree, hf_msgpack_type, tvb, s_offset, 1, ENC_NA0x00000000);
414}
415
416static void dissect_msgpack_ext(tvbuff_t* tvb, packet_info *pinfo, proto_tree* tree, int type, void* data, int* offset, char** value)
417{
418 char* label;
419 uint32_t len = 0;
420 uint8_t lensize = 0;
421 proto_tree* subtree;
422 unsigned offset_start = *offset;
423
424 label = (data ? (char*)data : "Ext");
425
426 subtree = proto_tree_add_subtree(tree, tvb, *offset, 0, ett_msgpack_ext, NULL((void*)0), label);
427
428 proto_tree_add_item(subtree, hf_msgpack_type, tvb, *offset, 1, ENC_NA0x00000000);
429 if (type >= 0xd4 && type <= 0xd8) {
430 len = 1 << (type - 0xd4);
431 proto_tree_add_uint(subtree, hf_msgpack_ext_len, tvb, *offset, 1, len);
432 }
433 else if (type == 0xc7) {
434 len = tvb_get_uint8(tvb, *offset + 2);
435 lensize = 1;
436 }
437 else if (type == 0xc8) {
438 len = tvb_get_ntohs(tvb, *offset + 2);
439 lensize = 2;
440 }
441 else if (type == 0xc9) {
442 len = tvb_get_ntohl(tvb, *offset + 2);
443 lensize = 4;
444 }
445 *offset += 1;
446
447 proto_tree_add_item(subtree, hf_msgpack_ext_type, tvb, *offset, 1, ENC_NA0x00000000);
448 *offset += 1;
449
450 if (lensize > 0) {
451 proto_tree_add_item(subtree, hf_msgpack_ext_len, tvb, *offset, lensize, ENC_BIG_ENDIAN0x00000000);
452 *offset += lensize;
453 }
454 proto_tree_add_item(subtree, hf_msgpack_ext_bytes, tvb, *offset, len, ENC_NA0x00000000);
455 if (value) {
456 *value = tvb_bytes_to_str(pinfo->pool, tvb, *offset, len);
457 }
458 *offset += len;
459
460 proto_item_set_len(subtree, *offset - offset_start);
461}
462
463// NOLINTNEXTLINE(misc-no-recursion)
464static void dissect_msgpack_object(tvbuff_t* tvb, packet_info* pinfo, proto_tree* tree, void* data, int* offset, char** value)
465{
466 uint8_t type;
467 int s_offset = *offset;
468
469 type = tvb_get_uint8(tvb, *offset);
470
471 // Nil
472 if (type == 0xc0) {
2
Assuming 'type' is not equal to 192
473 proto_tree_add_string_format(tree, hf_msgpack_string, tvb, *offset, 1, "nil", "nil");
474 if (value)
475 *value = "nil";
476 *offset += 1;
477 return;
478 }
479
480 // True/False
481 if (type == 0xc2 || type == 0xc3) {
3
Assuming 'type' is not equal to 194
4
Assuming 'type' is not equal to 195
482 proto_tree_add_boolean(tree, hf_msgpack_bool, tvb, *offset, 1, type - 0xc2);
483 if (value)
484 *value = (type - 0xc2) ? "True" : "False";
485 *offset += 1;
486 return;
487 }
488
489 // Integer
490 if (type >= 0xe0 || type <= 0x7f || (type >= 0xcc && type <= 0xd3)) {
5
Assuming 'type' is >= 224
491 dissect_msgpack_integer(tvb, pinfo, tree, type, data, offset, value);
6
Calling 'dissect_msgpack_integer'
492 return;
493 }
494
495 // Float
496 if (type == 0xca || type == 0xcb) {
497 dissect_msgpack_float(tvb, pinfo, tree, type, data, offset, value);
498 return;
499 }
500
501 // String
502 if (type >> 5 == 0x5 || type == 0xd9 || type == 0xda || type == 0xdb) {
503 dissect_msgpack_string(tvb, pinfo, tree, type, data, offset, value);
504 return;
505 }
506
507 // Bin
508 if (type == 0xc4 || type == 0xc5 || type == 0xc6) {
509 dissect_msgpack_bin(tvb, pinfo, tree, type, data, offset, value);
510 return;
511 }
512
513 // Array
514 if (type >> 4 == 0x9 || type == 0xdc || type == 0xdd) {
515 // We recurse here, but we'll run out of packet before we run out of stack.
516 dissect_msgpack_array(tvb, pinfo, tree, type, data, offset, value);
517 return;
518 }
519
520 // Map
521 if (type >> 4 == 0x8 || type == 0xde || type == 0xdf) {
522 // We recurse here, but we'll run out of packet before we run out of stack.
523 dissect_msgpack_map(tvb, pinfo, tree, type, data, offset, value);
524 return;
525 }
526
527 // Ext
528 if ((type >= 0xd4 && type <= 0xd8) || (type >= 0xc7 && type <= 0xc9)) {
529 dissect_msgpack_ext(tvb, pinfo, tree, type, data, offset, value);
530 return;
531 }
532
533 if (*offset - s_offset == 0) {
534 expert_add_info_format(pinfo, tree, &ei_msgpack_unsupported, "Type 0x%x is unsupported", type);
535 }
536}
537
538static int dissect_msgpack(tvbuff_t* tvb, packet_info* pinfo, proto_tree* tree, void* data)
539{
540 int offset = 0;
541 dissect_msgpack_object(tvb, pinfo, tree, data, &offset, NULL((void*)0));
1
Calling 'dissect_msgpack_object'
542 return offset;
543}
544
545void proto_register_msgpack(void)
546{
547 expert_module_t* expert_msgpack;
548
549 static hf_register_info hf[] = {
550 { &hf_msgpack_string,
551 { "String", "msgpack.string", FT_STRING, BASE_NONE, NULL((void*)0), 0x00, NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }
552 },
553 { &hf_msgpack_type,
554 { "Type", "msgpack.type", FT_UINT8, BASE_HEX|BASE_RANGE_STRING0x00000100, RVALS(msgpack_types)((0 ? (const struct _range_string*)0 : ((msgpack_types)))), 0x00, NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }
555 },
556 { &hf_msgpack_string_len,
557 { "Length", "msgpack.string.len", FT_UINT32, BASE_DEC, NULL((void*)0), 0x00, NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }
558 },
559 { &hf_msgpack_bin,
560 { "Bytes", "msgpack.bin", FT_BYTES, BASE_NONE, NULL((void*)0), 0x00, NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }
561 },
562 { &hf_msgpack_bin_len,
563 { "Length", "msgpack.bin.len", FT_UINT32, BASE_DEC, NULL((void*)0), 0x00, NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }
564 },
565 { &hf_msgpack_uint_fix,
566 { "Integer", "msgpack.integer.fixint", FT_UINT8, BASE_DEC, NULL((void*)0), 0x7F, NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }
567 },
568 { &hf_msgpack_uint_8,
569 { "Integer", "msgpack.integer.u8", FT_UINT8, BASE_DEC, NULL((void*)0), 0x00, NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }
570 },
571 { &hf_msgpack_uint_16,
572 { "Integer", "msgpack.integer.u16", FT_UINT16, BASE_DEC, NULL((void*)0), 0x00, NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }
573 },
574 { &hf_msgpack_uint_32,
575 { "Integer", "msgpack.integer.u32", FT_UINT32, BASE_DEC, NULL((void*)0), 0x00, NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }
576 },
577 { &hf_msgpack_uint_64,
578 { "Integer", "msgpack.integer.u64", FT_UINT64, BASE_DEC, NULL((void*)0), 0x00, NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }
579 },
580 { &hf_msgpack_int_fix,
581 { "Integer", "msgpack.integer.fixint", FT_INT8, BASE_DEC, NULL((void*)0), 0x1F, NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }
582 },
583 { &hf_msgpack_int_8,
584 { "Integer", "msgpack.integer.8", FT_INT8, BASE_DEC, NULL((void*)0), 0x00, NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }
585 },
586 { &hf_msgpack_int_16,
587 { "Integer", "msgpack.integer.16", FT_INT16, BASE_DEC, NULL((void*)0), 0x00, NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }
588 },
589 { &hf_msgpack_int_32,
590 { "Integer", "msgpack.integer.32", FT_INT32, BASE_DEC, NULL((void*)0), 0x00, NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }
591 },
592 { &hf_msgpack_int_64,
593 { "Integer", "msgpack.integer.64", FT_INT64, BASE_DEC, NULL((void*)0), 0x00, NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }
594 },
595 { &hf_msgpack_bool,
596 { "Boolean", "msgpack.boolean", FT_BOOLEAN, BASE_NONE, NULL((void*)0), 0x00, NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }
597 },
598 { &hf_msgpack_float,
599 { "Float", "msgpack.float", FT_FLOAT, BASE_NONE, NULL((void*)0), 0x00, NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }
600 },
601 { &hf_msgpack_double,
602 { "Double", "msgpack.double", FT_DOUBLE, BASE_NONE, NULL((void*)0), 0x00, NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }
603 },
604 { &hf_msgpack_ext_type,
605 { "Ext type", "msgpack.ext.type", FT_INT8, BASE_DEC, NULL((void*)0), 0x00, NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }
606 },
607 { &hf_msgpack_ext_len,
608 { "Length", "msgpack.ext.len", FT_UINT32, BASE_DEC, NULL((void*)0), 0x00, NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }
609 },
610 { &hf_msgpack_ext_bytes,
611 { "Ext", "msgpack.ext", FT_BYTES, BASE_NONE, NULL((void*)0), 0x00, NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }
612 }
613 };
614
615 static int* ett[] = {
616 &ett_msgpack,
617 &ett_msgpack_num,
618 &ett_msgpack_string,
619 &ett_msgpack_bin,
620 &ett_msgpack_array,
621 &ett_msgpack_map,
622 &ett_msgpack_map_elem,
623 &ett_msgpack_ext
624 };
625
626 static ei_register_info ei[] = {
627 { &ei_msgpack_unsupported, { "msgpack.unsupported", PI_UNDECODED0x05000000, PI_WARN0x00600000, "Unsupported type", EXPFILL0, ((void*)0), 0, {0, {((void*)0), ((void*)0), FT_NONE, BASE_NONE
, ((void*)0), 0, ((void*)0), -1, 0, HF_REF_TYPE_NONE, -1, ((void
*)0)}}
}}
628 };
629
630 proto_msgpack = proto_register_protocol("Message Pack", "MsgPack", "msgpack");
631 msgpack_handle = register_dissector("msgpack", dissect_msgpack, proto_msgpack);
632
633 expert_msgpack = expert_register_protocol(proto_msgpack);
634 expert_register_field_array(expert_msgpack, ei, array_length(ei)(sizeof (ei) / sizeof (ei)[0]));
635
636 proto_register_field_array(proto_msgpack, hf, array_length(hf)(sizeof (hf) / sizeof (hf)[0]));
637 proto_register_subtree_array(ett, array_length(ett)(sizeof (ett) / sizeof (ett)[0]));
638}
639
640void proto_reg_handoff_msgpack(void)
641{
642 // If this is ever streamed (transported over TCP) we need to add recursion checks
643 dissector_add_for_decode_as("udp.port", msgpack_handle);
644}
645
646/*
647 * Editor modelines - https://www.wireshark.org/tools/modelines.html
648 *
649 * Local variables:
650 * c-basic-offset: 8
651 * tab-width: 8
652 * indent-tabs-mode: t
653 * End:
654 *
655 * vi: set shiftwidth=8 tabstop=8 noexpandtab:
656 * :indentSize=8:tabSize=8:noTabs=false:
657 */