2 * Copyright (c) 2013 The TCPDUMP project
4 * Redistribution and use in source and binary forms, with or without
5 * modification, are permitted provided that: (1) source code
6 * distributions retain the above copyright notice and this paragraph
7 * in its entirety, and (2) distributions including binary code include
8 * the above copyright notice and this paragraph in its entirety in
9 * the documentation or other materials provided with the distribution.
10 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND
11 * WITHOUT ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, WITHOUT
12 * LIMITATION, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
13 * FOR A PARTICULAR PURPOSE.
15 * Original code by Ola Martin Lykkja (ola.lykkja@q-free.com)
18 #define NETDISSECT_REWORKED
23 #include <tcpdump-stdinc.h>
25 #include "interface.h"
27 #include "addrtoname.h"
31 ETSI TS 102 636-5-1 V1.1.1 (2011-02)
32 Intelligent Transport Systems (ITS); Vehicular Communications; GeoNetworking;
33 Part 5: Transport Protocols; Sub-part 1: Basic Transport Protocol
35 ETSI TS 102 636-4-1 V1.1.1 (2011-06)
36 Intelligent Transport Systems (ITS); Vehicular communications; GeoNetworking;
37 Part 4: Geographical addressing and forwarding for point-to-point and point-to-multipoint communications;
38 Sub-part 1: Media-Independent Functionality
41 #define GEONET_ADDR_LEN 8
43 static const struct tok msg_type_values[] = {
58 print_btp_body(netdissect_options *ndo,
63 const char *msg_type_str;
65 /* Assuming ItsDpuHeader */
68 msg_type_str = tok2str(msg_type_values, "unknown (%u)", msg_type);
70 ND_PRINT((ndo, "; ItsPduHeader v:%d t:%d-%s", version, msg_type, msg_type_str));
74 print_btp(netdissect_options *ndo,
77 uint16_t dest = EXTRACT_16BITS(bp+0);
78 uint16_t src = EXTRACT_16BITS(bp+2);
79 ND_PRINT((ndo, "; BTP Dst:%u Src:%u", dest, src));
83 print_long_pos_vector(netdissect_options *ndo,
88 ND_PRINT((ndo, "GN_ADDR:%s ", linkaddr_string (ndo, bp, 0, GEONET_ADDR_LEN)));
90 if (!ND_TTEST2(*(bp+12), 8))
92 lat = EXTRACT_32BITS(bp+12);
93 ND_PRINT((ndo, "lat:%d ", lat));
94 lon = EXTRACT_32BITS(bp+16);
95 ND_PRINT((ndo, "lon:%d", lon));
101 * This is the top level routine of the printer. 'p' points
102 * to the geonet header of the packet.
105 geonet_print(netdissect_options *ndo, const u_char *eth, const u_char *bp, u_int length)
111 uint16_t payload_length;
113 const char *next_hdr_txt = "Unknown";
114 const char *hdr_type_txt = "Unknown";
117 ND_PRINT((ndo, "GeoNet src:%s; ", etheraddr_string(ndo, eth+6)));
119 /* Process Common Header */
124 version = bp[0] >> 4;
125 next_hdr = bp[0] & 0x0f;
126 hdr_type = bp[1] >> 4;
127 hdr_subtype = bp[1] & 0x0f;
128 payload_length = EXTRACT_16BITS(bp+4);
132 case 0: next_hdr_txt = "Any"; break;
133 case 1: next_hdr_txt = "BTP-A"; break;
134 case 2: next_hdr_txt = "BTP-B"; break;
135 case 3: next_hdr_txt = "IPv6"; break;
139 case 0: hdr_type_txt = "Any"; break;
140 case 1: hdr_type_txt = "Beacon"; break;
141 case 2: hdr_type_txt = "GeoUnicast"; break;
142 case 3: switch (hdr_subtype) {
143 case 0: hdr_type_txt = "GeoAnycastCircle"; break;
144 case 1: hdr_type_txt = "GeoAnycastRect"; break;
145 case 2: hdr_type_txt = "GeoAnycastElipse"; break;
148 case 4: switch (hdr_subtype) {
149 case 0: hdr_type_txt = "GeoBroadcastCircle"; break;
150 case 1: hdr_type_txt = "GeoBroadcastRect"; break;
151 case 2: hdr_type_txt = "GeoBroadcastElipse"; break;
154 case 5: switch (hdr_subtype) {
155 case 0: hdr_type_txt = "TopoScopeBcast-SH"; break;
156 case 1: hdr_type_txt = "TopoScopeBcast-MH"; break;
159 case 6: switch (hdr_subtype) {
160 case 0: hdr_type_txt = "LocService-Request"; break;
161 case 1: hdr_type_txt = "LocService-Reply"; break;
166 ND_PRINT((ndo, "v:%d ", version));
167 ND_PRINT((ndo, "NH:%d-%s ", next_hdr, next_hdr_txt));
168 ND_PRINT((ndo, "HT:%d-%d-%s ", hdr_type, hdr_subtype, hdr_type_txt));
169 ND_PRINT((ndo, "HopLim:%d ", hop_limit));
170 ND_PRINT((ndo, "Payload:%d ", payload_length));
171 if (print_long_pos_vector(ndo, bp + 8) == -1)
174 /* Skip Common Header */
178 /* Process Extended Headers */
186 case 2: /* GeoUnicast */
188 case 3: switch (hdr_subtype) {
189 case 0: /* GeoAnycastCircle */
191 case 1: /* GeoAnycastRect */
193 case 2: /* GeoAnycastElipse */
197 case 4: switch (hdr_subtype) {
198 case 0: /* GeoBroadcastCircle */
200 case 1: /* GeoBroadcastRect */
202 case 2: /* GeoBroadcastElipse */
206 case 5: switch (hdr_subtype) {
207 case 0: /* TopoScopeBcast-SH */
210 case 1: /* TopoScopeBcast-MH */
215 case 6: switch (hdr_subtype) {
216 case 0: /* LocService-Request */
218 case 1: /* LocService-Reply */
224 /* Skip Extended headers */
226 if (length < (u_int)hdr_size)
228 ND_TCHECK2(*bp, hdr_size);
235 case 2: /* BTP A/B */
244 * XXX - did print_btp_body()
245 * return if length < 2
246 * because this is optional,
247 * or was that just not
248 * reporting genuine errors?
251 print_btp_body(ndo, bp);
259 /* Print user data part */
261 ND_DEFAULTPRINT(bp, length);
265 ND_PRINT((ndo, " Malformed (small) "));
266 /* XXX - print the remaining data as hex? */
270 ND_PRINT((ndo, "[|geonet]"));
276 * c-style: whitesmith