Bug Summary

File:builds/wireshark/wireshark/epan/dissectors/packet-geneve.c
Warning:line 245, column 13
Value stored to 'offset' is never read

Annotated Source Code

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clang -cc1 -cc1 -triple x86_64-pc-linux-gnu -analyze -disable-free -clear-ast-before-backend -disable-llvm-verifier -discard-value-names -main-file-name packet-geneve.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-geneve.c -o /builds/wireshark/wireshark/sbout/2024-10-21-100301-3898-1 -Xclang -analyzer-output=html -faddrsig -D__GCC_HAVE_DWARF2_CFI_ASM=1 -o /builds/wireshark/wireshark/sbout/2024-10-21-100301-3898-1 -x c /builds/wireshark/wireshark/epan/dissectors/packet-geneve.c
1/* packet-geneve.c
2 * Routines for Geneve - Generic Network Virtualization Encapsulation
3 * https://tools.ietf.org/html/draft-ietf-nvo3-geneve
4 *
5 * Copyright (c) 2024 cPacket Networks, Inc. All Rights Reserved.
6 * Author: Martin Greenberg <mgreenberg@cpacket.com>
7 *
8 * Copyright (c) 2014 VMware, Inc. All Rights Reserved.
9 * Author: Jesse Gross <jesse@nicira.com>
10 *
11 * Copyright 2021, Atul Sharma <asharm37@ncsu.edu>
12 *
13 * Wireshark - Network traffic analyzer
14 * By Gerald Combs <gerald@wireshark.org>
15 * Copyright 1998 Gerald Combs
16 *
17 * SPDX-License-Identifier: GPL-2.0-or-later
18 */
19
20
21#include "config.h"
22
23#include <epan/packet.h>
24#include <epan/etypes.h>
25#include <epan/expert.h>
26#include <epan/value_string.h>
27#include <epan/tfs.h>
28#include <epan/unit_strings.h>
29
30#define UDP_PORT_GENEVE6081 6081
31#define GENEVE_VER0 0
32
33#define VER_SHIFT6 6
34#define HDR_OPTS_LEN_MASK0x3F 0x3F
35
36#define FLAG_OAM(1 << 7) (1 << 7)
37
38#define OPT_TYPE_CRITICAL(1 << 7) (1 << 7)
39#define OPT_FLAGS_SHIFT5 5
40#define OPT_LEN_MASK0x1F 0x1F
41
42static const range_string class_id_names[] = {
43 { 0, 0xFF, "Standard" },
44 { 0x0100, 0x0100, "Linux" },
45 { 0x0101, 0x0101, "Open vSwitch" },
46 { 0x0102, 0x0102, "Open Virtual Networking (OVN)" },
47 { 0x0103, 0x0103, "In-band Network Telemetry (INT)" },
48 { 0x0104, 0x0104, "VMware" },
49 { 0x0105, 0x0105, "Amazon.com, Inc."},
50 { 0x0106, 0x0106, "Cisco Systems, Inc." },
51 { 0x0107, 0x0107, "Oracle Corporation" },
52 { 0x0108, 0x0110, "Amazon.com, Inc." },
53 { 0x0111, 0x0118, "IBM" },
54 { 0x0119, 0x0128, "Ericsson" },
55 { 0x0129, 0x0129, "Oxide Computer Company" },
56 { 0x0130, 0x0131, "Cisco Systems, Inc." },
57 { 0x0132, 0x0135, "Google LLC" },
58 { 0x0136, 0x0136, "InfoQuick Global Connection Tech Ltd." },
59 { 0x0137, 0x0163, "Unssigned" },
60 { 0x0164, 0x0164, "cPacket Networks, Inc." },
61 { 0x0165, 0xFEFF, "Unassigned" },
62 { 0xFFF0, 0xFFFF, "Experimental" },
63 { 0, 0, NULL((void*)0) }
64};
65
66#define GENEVE_GCP_VNID0x013201 0x013201
67#define GENEVE_GCP_ENDPOINT0x013202 0x013202
68#define GENEVE_GCP_PROFILE0x013203 0x013203
69#define GENEVE_CPACKET_METADATA0x016400 0x016400
70
71static const val64_string option_names[] = {
72 { GENEVE_GCP_VNID0x013201, "GCP Virtual Network ID" },
73 { GENEVE_GCP_ENDPOINT0x013202, "GCP Endpoint ID" },
74 { GENEVE_GCP_PROFILE0x013203, "GCP Profile ID" },
75 { GENEVE_CPACKET_METADATA0x016400, "cPacket Meta-data" },
76 { 0, NULL((void*)0) }
77};
78
79void proto_register_geneve(void);
80void proto_reg_handoff_geneve(void);
81
82static dissector_handle_t geneve_handle;
83
84static int proto_geneve;
85
86static int hf_geneve_version;
87static int hf_geneve_flags;
88static int hf_geneve_flag_oam;
89static int hf_geneve_flag_critical;
90static int hf_geneve_flag_reserved;
91static int hf_geneve_proto_type;
92static int hf_geneve_vni;
93static int hf_geneve_reserved;
94static int hf_geneve_options;
95static int hf_geneve_option_class;
96static int hf_geneve_option_type;
97static int hf_geneve_option_type_critical;
98static int hf_geneve_option_flags;
99static int hf_geneve_option_flags_reserved;
100static int hf_geneve_option_length;
101static int hf_geneve_option;
102static int hf_geneve_opt_gcp_vnid;
103static int hf_geneve_opt_gcp_reserved;
104static int hf_geneve_opt_gcp_direction;
105static int hf_geneve_opt_gcp_endpoint;
106static int hf_geneve_opt_gcp_profile;
107static int hf_geneve_opt_cpkt_seqnum;
108static int hf_geneve_opt_cpkt_origlen;
109static int hf_geneve_opt_cpkt_reserved;
110static int hf_geneve_opt_cpkt_timestamp;
111static int hf_geneve_opt_cpkt_ts_sec;
112static int hf_geneve_opt_cpkt_ts_nsec;
113static int hf_geneve_opt_cpkt_ts_fracns;
114static int hf_geneve_opt_cpkt_version;
115static int hf_geneve_opt_cpkt_devid;
116static int hf_geneve_opt_cpkt_portid;
117
118static int hf_geneve_opt_unknown_data;
119
120static int ett_geneve;
121static int ett_geneve_flags;
122static int ett_geneve_opt_flags;
123static int ett_geneve_options;
124static int ett_geneve_opt_data;
125
126static expert_field ei_geneve_ver_unknown;
127static expert_field ei_geneve_opt_len_invalid;
128
129static dissector_table_t ethertype_dissector_table;
130
131static const struct true_false_string tfs_geneve_gcp_direction = {
132 "Egress",
133 "Ingress"
134};
135
136static const char *
137format_option_name(wmem_allocator_t *scope, uint16_t opt_class, uint8_t opt_type)
138{
139 const char *name;
140
141 name = wmem_strdup_printf(scope,
142 "%s, Class: %s (0x%04x) Type: 0x%02x",
143 val64_to_str_const(((uint64_t)opt_class << 8) | opt_type,
144 option_names, "Unknown"),
145 rval_to_str_const(opt_class, class_id_names, "Unknown"),
146 opt_class, opt_type);
147
148 return name;
149}
150
151static void
152dissect_option(wmem_allocator_t *scope, tvbuff_t *tvb, proto_tree *opts_tree, int offset,
153 uint16_t opt_class, uint8_t opt_type, int len)
154{
155 proto_item *opt_item, *type_item, *hidden_item, *flag_item;
156 proto_tree *opt_tree, *flag_tree;
157 const char *critical;
158 uint8_t flags;
159
160 critical = opt_type & OPT_TYPE_CRITICAL(1 << 7) ? "Critical" : "Non-critical";
161
162 opt_item = proto_tree_add_item(opts_tree, hf_geneve_option,
163 tvb, offset, len, ENC_NA0x00000000);
164 proto_item_set_text(opt_item, "%s (%s)",
165 format_option_name(scope, opt_class, opt_type),
166 critical);
167
168 opt_tree = proto_item_add_subtree(opt_item, ett_geneve_opt_data);
169
170 proto_tree_add_item(opt_tree, hf_geneve_option_class, tvb,
171 offset, 2, ENC_BIG_ENDIAN0x00000000);
172 offset += 2;
173
174 type_item = proto_tree_add_item(opt_tree, hf_geneve_option_type, tvb,
175 offset, 1, ENC_BIG_ENDIAN0x00000000);
176 proto_item_append_text(type_item, " (%s)", critical);
177 hidden_item = proto_tree_add_item(opt_tree, hf_geneve_option_type_critical,
178 tvb, offset, 1, ENC_BIG_ENDIAN0x00000000);
179 proto_item_set_hidden(hidden_item);
180 offset += 1;
181
182 flags = tvb_get_uint8(tvb, offset) >> OPT_FLAGS_SHIFT5;
183 flag_item = proto_tree_add_uint(opt_tree, hf_geneve_option_flags, tvb,
184 offset, 1, flags);
185 flag_tree = proto_item_add_subtree(flag_item, ett_geneve_opt_flags);
186 proto_tree_add_item(flag_tree, hf_geneve_option_flags_reserved, tvb,
187 offset, 1, ENC_BIG_ENDIAN0x00000000);
188 if (flags) {
189 proto_item_append_text(flag_item, " (RSVD)");
190 } else {
191 proto_item_set_hidden(flag_item);
192 }
193
194 proto_tree_add_uint(opt_tree, hf_geneve_option_length, tvb, offset, 1, len);
195 offset += 1;
196
197 switch (((uint64_t)opt_class << 8) | opt_type) {
198 case GENEVE_GCP_VNID0x013201:
199 proto_tree_add_bits_item(opt_tree, hf_geneve_opt_gcp_vnid, tvb, offset * 8,
200 28, ENC_BIG_ENDIAN0x00000000);
201 proto_tree_add_item(opt_tree, hf_geneve_opt_gcp_direction, tvb, offset,
202 4, ENC_NA0x00000000);
203 proto_tree_add_item(opt_tree, hf_geneve_opt_gcp_reserved, tvb, offset,
204 4, ENC_NA0x00000000);
205 break;
206 case GENEVE_GCP_ENDPOINT0x013202:
207 proto_tree_add_item(opt_tree, hf_geneve_opt_gcp_endpoint, tvb, offset,
208 len - 4, ENC_NA0x00000000);
209 break;
210 case GENEVE_GCP_PROFILE0x013203:
211 proto_tree_add_item(opt_tree, hf_geneve_opt_gcp_profile, tvb, offset,
212 len - 4, ENC_BIG_ENDIAN0x00000000);
213 break;
214 case GENEVE_CPACKET_METADATA0x016400:
215 proto_tree_add_item(opt_tree, hf_geneve_opt_cpkt_seqnum, tvb, offset,
216 4, ENC_BIG_ENDIAN0x00000000);
217 offset += 4;
218 proto_tree_add_item(opt_tree, hf_geneve_opt_cpkt_origlen, tvb, offset,
219 2, ENC_BIG_ENDIAN0x00000000);
220 offset += 2;
221 proto_tree_add_item(opt_tree, hf_geneve_opt_cpkt_reserved, tvb, offset,
222 1, ENC_BIG_ENDIAN0x00000000);
223 offset += 1;
224 proto_tree_add_item(opt_tree, hf_geneve_opt_cpkt_version, tvb, offset,
225 1, ENC_BIG_ENDIAN0x00000000);
226 offset += 1;
227 // PTPv2 timestamp has more resolution than NStime supports/displays,
228 // but parse appropriate subsection of into NStime for user convenience
229 proto_tree_add_time_item(opt_tree, hf_geneve_opt_cpkt_timestamp, tvb, offset+2, 8,
230 ENC_TIME_SECS_NSECS0x00000000, NULL((void*)0), NULL((void*)0), NULL((void*)0));
231 proto_tree_add_item(opt_tree, hf_geneve_opt_cpkt_ts_sec, tvb, offset,
232 6, ENC_BIG_ENDIAN0x00000000);
233 offset += 6;
234 proto_tree_add_item(opt_tree, hf_geneve_opt_cpkt_ts_nsec, tvb, offset,
235 4, ENC_BIG_ENDIAN0x00000000);
236 offset += 4;
237 proto_tree_add_item(opt_tree, hf_geneve_opt_cpkt_ts_fracns, tvb, offset,
238 2, ENC_BIG_ENDIAN0x00000000);
239 offset += 2;
240 proto_tree_add_item(opt_tree, hf_geneve_opt_cpkt_devid, tvb, offset,
241 2, ENC_BIG_ENDIAN0x00000000);
242 offset += 2;
243 proto_tree_add_item(opt_tree, hf_geneve_opt_cpkt_portid, tvb, offset,
244 2, ENC_BIG_ENDIAN0x00000000);
245 offset += 2;
Value stored to 'offset' is never read
246 break;
247 default:
248 proto_tree_add_item(opt_tree, hf_geneve_opt_unknown_data, tvb, offset,
249 len - 4, ENC_NA0x00000000);
250 break;
251 }
252}
253
254static void
255dissect_geneve_options(tvbuff_t *tvb, packet_info *pinfo,
256 proto_tree *geneve_tree, int offset, int len)
257{
258 proto_item *opts_item;
259 proto_tree *opts_tree;
260 uint16_t opt_class;
261 uint8_t opt_type;
262 uint8_t opt_len;
263
264 opts_item = proto_tree_add_item(geneve_tree, hf_geneve_options, tvb,
265 offset, len, ENC_NA0x00000000);
266 proto_item_set_text(opts_item, "Options: (%u bytes)", len);
267 opts_tree = proto_item_add_subtree(opts_item, ett_geneve_options);
268
269 while (len > 0) {
270 opt_class = tvb_get_ntohs(tvb, offset);
271 opt_type = tvb_get_uint8(tvb, offset + 2);
272 opt_len = 4 + ((tvb_get_uint8(tvb, offset + 3) & OPT_LEN_MASK0x1F) * 4);
273
274 if (opt_len > len) {
275 proto_tree_add_expert_format(opts_tree, pinfo,
276 &ei_geneve_opt_len_invalid, tvb,
277 offset + 3, 1,
278 "%s (length of %u is past end of options)",
279 format_option_name(pinfo->pool, opt_class, opt_type),
280 opt_len);
281 return;
282 }
283
284 dissect_option(pinfo->pool, tvb, opts_tree, offset, opt_class, opt_type, opt_len);
285
286 offset += opt_len;
287 len -= opt_len;
288 };
289}
290
291static int
292dissect_geneve(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, void* data _U___attribute__((unused)))
293{
294 proto_item *ti, *rsvd_item;
295 proto_tree *geneve_tree;
296 tvbuff_t *next_tvb;
297 int offset = 0;
298 uint8_t ver_opt;
299 uint8_t ver;
300 uint8_t flags;
301 uint16_t proto_type;
302 int opts_len;
303 static int * const flag_fields[] = {
304 &hf_geneve_flag_oam,
305 &hf_geneve_flag_critical,
306 &hf_geneve_flag_reserved,
307 NULL((void*)0)
308 };
309
310 col_set_str(pinfo->cinfo, COL_PROTOCOL, "Geneve");
311 col_clear(pinfo->cinfo, COL_INFO);
312
313 ti = proto_tree_add_item(tree, proto_geneve, tvb, offset, -1, ENC_NA0x00000000);
314 geneve_tree = proto_item_add_subtree(ti, ett_geneve);
315
316 /* Version. */
317 ver_opt = tvb_get_uint8(tvb, offset);
318 ver = ver_opt >> VER_SHIFT6;
319 proto_tree_add_uint(geneve_tree, hf_geneve_version, tvb,
320 offset, 1, ver);
321
322 if (ver != GENEVE_VER0) {
323 proto_tree_add_expert_format(geneve_tree, pinfo,
324 &ei_geneve_ver_unknown, tvb, offset, 1,
325 "Unknown version %u", ver);
326 col_add_fstr(pinfo->cinfo, COL_INFO, "Unknown Geneve version %u", ver);
327 }
328
329 /* Option length. */
330 opts_len = (ver_opt & HDR_OPTS_LEN_MASK0x3F) * 4;
331 proto_tree_add_uint(geneve_tree, hf_geneve_option_length, tvb,
332 offset, 1, opts_len);
333 offset += 1;
334
335 /* Flags. */
336 flags = tvb_get_uint8(tvb, offset);
337 proto_tree_add_bitmask(geneve_tree, tvb, offset, hf_geneve_flags, ett_geneve_flags, flag_fields, ENC_BIG_ENDIAN0x00000000);
338 offset += 1;
339
340 /* Protocol Type. */
341 proto_tree_add_item(geneve_tree, hf_geneve_proto_type, tvb,
342 offset, 2, ENC_BIG_ENDIAN0x00000000);
343
344 proto_type = tvb_get_ntohs(tvb, offset);
345 col_add_fstr(pinfo->cinfo, COL_INFO, "Encapsulated %s",
346 val_to_str(proto_type, etype_vals, "0x%04x (unknown)"));
347
348 offset += 2;
349
350 /* VNI. */
351 proto_tree_add_item(geneve_tree, hf_geneve_vni, tvb, offset, 3,
352 ENC_BIG_ENDIAN0x00000000);
353 proto_item_append_text(ti, ", VNI: 0x%06x%s", tvb_get_ntoh24(tvb, offset),
354 flags & FLAG_OAM(1 << 7) ? ", OAM" : "");
355 offset += 3;
356
357 /* Reserved. */
358 rsvd_item = proto_tree_add_item(geneve_tree, hf_geneve_reserved, tvb,
359 offset, 1, ENC_BIG_ENDIAN0x00000000);
360 if (!tvb_get_uint8(tvb, offset)) {
361 proto_item_set_hidden(rsvd_item);
362 }
363 offset += 1;
364
365 /* Options. */
366 if (tree && opts_len) {
367 dissect_geneve_options(tvb, pinfo, geneve_tree, offset, opts_len);
368 }
369 offset += opts_len;
370
371 proto_item_set_len(ti, offset);
372
373 next_tvb = tvb_new_subset_remaining(tvb, offset);
374 if (!dissector_try_uint(ethertype_dissector_table, proto_type, next_tvb, pinfo, tree))
375 call_data_dissector(next_tvb, pinfo, tree);
376
377 return tvb_captured_length(tvb);
378}
379
380/* Register Geneve with Wireshark */
381void
382proto_register_geneve(void)
383{
384 static hf_register_info hf[] = {
385 { &hf_geneve_version,
386 { "Version", "geneve.version",
387 FT_UINT8, BASE_DEC, NULL((void*)0), 0x00,
388 NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }
389 },
390 { &hf_geneve_flags,
391 { "Flags", "geneve.flags",
392 FT_UINT8, BASE_HEX, NULL((void*)0), 0x00,
393 NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }
394 },
395 { &hf_geneve_flag_oam,
396 { "Operations, Administration and Management Frame", "geneve.flags.oam",
397 FT_BOOLEAN, 8, NULL((void*)0), 0x80,
398 NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }
399 },
400 { &hf_geneve_flag_critical,
401 { "Critical Options Present", "geneve.flags.critical",
402 FT_BOOLEAN, 8, NULL((void*)0), 0x40,
403 NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }
404 },
405 { &hf_geneve_flag_reserved,
406 { "Reserved", "geneve.flags.reserved",
407 FT_BOOLEAN, 8, NULL((void*)0), 0x3F,
408 NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }
409 },
410 { &hf_geneve_proto_type,
411 { "Protocol Type", "geneve.proto_type",
412 FT_UINT16, BASE_HEX, VALS(etype_vals)((0 ? (const struct _value_string*)0 : ((etype_vals)))), 0x0,
413 NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }
414 },
415 { &hf_geneve_vni,
416 { "Virtual Network Identifier (VNI)", "geneve.vni",
417 FT_UINT24, BASE_HEX_DEC, NULL((void*)0), 0x0,
418 NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }
419 },
420 { &hf_geneve_reserved,
421 { "Reserved", "geneve.reserved",
422 FT_UINT8, BASE_HEX, NULL((void*)0), 0x00,
423 NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }
424 },
425 { &hf_geneve_options,
426 { "Geneve Options", "geneve.options",
427 FT_BYTES, BASE_NONE, NULL((void*)0), 0x00,
428 NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }
429 },
430 { &hf_geneve_option_class,
431 { "Class", "geneve.option.class",
432 FT_UINT16, BASE_HEX | BASE_RANGE_STRING0x00000100, RVALS(class_id_names)((0 ? (const struct _range_string*)0 : ((class_id_names)))), 0x00,
433 NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }
434 },
435 { &hf_geneve_option_type,
436 { "Type", "geneve.option.type",
437 FT_UINT8, BASE_HEX, NULL((void*)0), 0x00,
438 NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }
439 },
440 { &hf_geneve_option_type_critical,
441 { "Critical Option", "geneve.option.type.critical",
442 FT_BOOLEAN, 8, NULL((void*)0), 0x80,
443 NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }
444 },
445 { &hf_geneve_option_flags,
446 { "Flags", "geneve.option.flags",
447 FT_UINT8, BASE_HEX, NULL((void*)0), 0x00,
448 NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }
449 },
450 { &hf_geneve_option_flags_reserved,
451 { "Reserved", "geneve.option.flags.reserved",
452 FT_BOOLEAN, 8, NULL((void*)0), 0xE0,
453 NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }
454 },
455 { &hf_geneve_option_length,
456 { "Length", "geneve.option.length",
457 FT_UINT8, BASE_DEC|BASE_UNIT_STRING0x00001000, UNS(&units_byte_bytes)((0 ? (const struct unit_name_string*)0 : ((&units_byte_bytes
))))
, 0x00,
458 NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }
459 },
460 { &hf_geneve_option,
461 { "Option", "geneve.option",
462 FT_BYTES, BASE_NONE, NULL((void*)0), 0x00,
463 NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }
464 },
465 { &hf_geneve_opt_gcp_vnid,
466 { "GCP Virtual Network ID", "geneve.option.gcp.vnid",
467 FT_UINT32, BASE_DEC, NULL((void*)0), 0x00,
468 NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }
469 },
470 { &hf_geneve_opt_gcp_reserved,
471 { "GCP Reserved bits", "geneve.option.gcp.reserved",
472 FT_BOOLEAN, 32, NULL((void*)0), 0x0000000E,
473 NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }
474 },
475 { &hf_geneve_opt_gcp_direction,
476 { "GCP Traffic Direction", "geneve.option.gcp.direction",
477 FT_BOOLEAN, 32, TFS(&tfs_geneve_gcp_direction)((0 ? (const struct true_false_string*)0 : ((&tfs_geneve_gcp_direction
))))
, 0x00000001,
478 NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }
479 },
480 { &hf_geneve_opt_gcp_endpoint,
481 { "GCP Endpoint ID", "geneve.option.gcp.endpoint",
482 FT_BYTES, BASE_NONE, NULL((void*)0), 0x00,
483 NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }
484 },
485 { &hf_geneve_opt_gcp_profile,
486 { "GCP Profile ID", "geneve.option.gcp.profile",
487 FT_UINT64, BASE_DEC, NULL((void*)0), 0x00,
488 NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }
489 },
490 { &hf_geneve_opt_cpkt_seqnum,
491 { "cPacket Packet ID", "geneve.option.cPacket.packetid",
492 FT_UINT32, BASE_DEC, NULL((void*)0), 0x00,
493 NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }
494 },
495 { &hf_geneve_opt_cpkt_origlen,
496 { "cPacket Original length", "geneve.option.cPacket.orig_len",
497 FT_UINT16, BASE_DEC, NULL((void*)0), 0x00,
498 NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }
499 },
500 { &hf_geneve_opt_cpkt_reserved,
501 { "cPacket Reserved", "geneve.option.cPacket.reserved",
502 FT_UINT8, BASE_HEX, NULL((void*)0), 0x00,
503 NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }
504 },
505 { &hf_geneve_opt_cpkt_version,
506 { "cPacket Metadata version", "geneve.option.cPacket.version",
507 FT_UINT8, BASE_DEC, NULL((void*)0), 0x00,
508 NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }
509 },
510 { &hf_geneve_opt_cpkt_timestamp,
511 { "cPacket Timestamp", "geneve.option.cPacket.timestamp",
512 FT_ABSOLUTE_TIME, ABSOLUTE_TIME_UTC, NULL((void*)0), 0x00,
513 NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }
514 },
515 { &hf_geneve_opt_cpkt_ts_sec,
516 { "cPacket Timestamp (s)", "geneve.option.cPacket.ts_sec",
517 FT_UINT48, BASE_DEC, NULL((void*)0), 0x00,
518 NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }
519 },
520 { &hf_geneve_opt_cpkt_ts_nsec,
521 { "cPacket Timestamp (ns)", "geneve.option.cPacket.ts_nsec",
522 FT_UINT32, BASE_DEC, NULL((void*)0), 0x00,
523 NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }
524 },
525 { &hf_geneve_opt_cpkt_ts_fracns,
526 { "cPacket Timestamp (frac. ns)", "geneve.option.cPacket.ts_fracns",
527 FT_UINT16, BASE_DEC, NULL((void*)0), 0x00,
528 NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }
529 },
530 { &hf_geneve_opt_cpkt_devid,
531 { "cPacket Device ID", "geneve.option.cPacket.device_id",
532 FT_UINT16, BASE_DEC, NULL((void*)0), 0x00,
533 NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }
534 },
535 { &hf_geneve_opt_cpkt_portid,
536 { "cPacket Port ID", "geneve.option.cPacket.port_id",
537 FT_UINT16, BASE_DEC, NULL((void*)0), 0x00,
538 NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }
539 },
540 { &hf_geneve_opt_unknown_data,
541 { "Unknown Option Data", "geneve.option.unknown.data",
542 FT_BYTES, BASE_NONE, NULL((void*)0), 0x00,
543 NULL((void*)0), HFILL-1, 0, HF_REF_TYPE_NONE, -1, ((void*)0) }
544 },
545 };
546
547 static int *ett[] = {
548 &ett_geneve,
549 &ett_geneve_flags,
550 &ett_geneve_options,
551 &ett_geneve_opt_flags,
552 &ett_geneve_opt_data,
553 };
554
555 static ei_register_info ei[] = {
556 { &ei_geneve_ver_unknown, { "geneve.version.unknown",
557 PI_PROTOCOL0x09000000, PI_WARN0x00600000, "Unknown version", 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)}}
}},
558 { &ei_geneve_opt_len_invalid, { "geneve.option.length.invalid",
559 PI_PROTOCOL0x09000000, PI_WARN0x00600000, "Invalid length for option", 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)}}
}},
560 };
561
562 expert_module_t *expert_geneve;
563
564 /* Register the protocol name and description */
565 proto_geneve = proto_register_protocol("Generic Network Virtualization Encapsulation",
566 "Geneve", "geneve");
567
568 proto_register_field_array(proto_geneve, hf, array_length(hf)(sizeof (hf) / sizeof (hf)[0]));
569 proto_register_subtree_array(ett, array_length(ett)(sizeof (ett) / sizeof (ett)[0]));
570
571 expert_geneve = expert_register_protocol(proto_geneve);
572 expert_register_field_array(expert_geneve, ei, array_length(ei)(sizeof (ei) / sizeof (ei)[0]));
573
574 geneve_handle = register_dissector("geneve", dissect_geneve, proto_geneve);
575}
576
577void
578proto_reg_handoff_geneve(void)
579{
580 dissector_add_uint_with_preference("udp.port", UDP_PORT_GENEVE6081, geneve_handle);
581
582 ethertype_dissector_table = find_dissector_table("ethertype");
583}
584
585/*
586 * Editor modelines - https://www.wireshark.org/tools/modelines.html
587 *
588 * Local variables:
589 * c-basic-offset: 4
590 * tab-width: 8
591 * indent-tabs-mode: nil
592 * End:
593 *
594 * vi: set shiftwidth=4 tabstop=8 expandtab:
595 * :indentSize=4:tabSize=8:noTabs=true:
596 */