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Diffstat (limited to 'contrib/tcpdump/print-geonet.c')
| -rw-r--r-- | contrib/tcpdump/print-geonet.c | 247 |
1 files changed, 247 insertions, 0 deletions
diff --git a/contrib/tcpdump/print-geonet.c b/contrib/tcpdump/print-geonet.c new file mode 100644 index 000000000000..d902066eff3a --- /dev/null +++ b/contrib/tcpdump/print-geonet.c @@ -0,0 +1,247 @@ +/* + * Copyright (c) 2013 The TCPDUMP project + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that: (1) source code + * distributions retain the above copyright notice and this paragraph + * in its entirety, and (2) distributions including binary code include + * the above copyright notice and this paragraph in its entirety in + * the documentation or other materials provided with the distribution. + * THIS SOFTWARE IS PROVIDED ``AS IS'' AND + * WITHOUT ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, WITHOUT + * LIMITATION, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS + * FOR A PARTICULAR PURPOSE. + * + * Original code by Ola Martin Lykkja (ola.lykkja@q-free.com) + */ + +#define NETDISSECT_REWORKED +#ifdef HAVE_CONFIG_H +#include "config.h" +#endif + +#include <tcpdump-stdinc.h> + +#include "interface.h" +#include "extract.h" +#include "addrtoname.h" + + +/* + ETSI TS 102 636-5-1 V1.1.1 (2011-02) + Intelligent Transport Systems (ITS); Vehicular Communications; GeoNetworking; + Part 5: Transport Protocols; Sub-part 1: Basic Transport Protocol + + ETSI TS 102 636-4-1 V1.1.1 (2011-06) + Intelligent Transport Systems (ITS); Vehicular communications; GeoNetworking; + Part 4: Geographical addressing and forwarding for point-to-point and point-to-multipoint communications; + Sub-part 1: Media-Independent Functionality +*/ + +#define GEONET_ADDR_LEN 8 + +static const struct tok msg_type_values[] = { + { 0, "CAM" }, + { 1, "DENM" }, + { 101, "TPEGM" }, + { 102, "TSPDM" }, + { 103, "VPM" }, + { 104, "SRM" }, + { 105, "SLAM" }, + { 106, "ecoCAM" }, + { 107, "ITM" }, + { 150, "SA" }, + { 0, NULL } +}; + +static void +print_btp_body(netdissect_options *ndo, + const u_char *bp, u_int length) +{ + int version; + int msg_type; + const char *msg_type_str; + + if (length <= 2) { + return; + } + + /* Assuming ItsDpuHeader */ + version = bp[0]; + msg_type = bp[1]; + msg_type_str = tok2str(msg_type_values, "unknown (%u)", msg_type); + + ND_PRINT((ndo, "; ItsPduHeader v:%d t:%d-%s", version, msg_type, msg_type_str)); +} + +static void +print_btp(netdissect_options *ndo, + const u_char *bp) +{ + uint16_t dest = EXTRACT_16BITS(bp+0); + uint16_t src = EXTRACT_16BITS(bp+2); + ND_PRINT((ndo, "; BTP Dst:%u Src:%u", dest, src)); +} + +static void +print_long_pos_vector(netdissect_options *ndo, + const u_char *bp) +{ + uint32_t lat, lon; + + ND_PRINT((ndo, "GN_ADDR:%s ", linkaddr_string (ndo, bp, 0, GEONET_ADDR_LEN))); + + lat = EXTRACT_32BITS(bp+12); + ND_PRINT((ndo, "lat:%d ", lat)); + lon = EXTRACT_32BITS(bp+16); + ND_PRINT((ndo, "lon:%d", lon)); +} + + +/* + * This is the top level routine of the printer. 'p' points + * to the geonet header of the packet. + */ +void +geonet_print(netdissect_options *ndo, const u_char *eth, const u_char *bp, u_int length) +{ + ND_PRINT((ndo, "GeoNet src:%s; ", etheraddr_string(ndo, eth+6))); + + if (length >= 36) { + /* Process Common Header */ + int version = bp[0] >> 4; + int next_hdr = bp[0] & 0x0f; + int hdr_type = bp[1] >> 4; + int hdr_subtype = bp[1] & 0x0f; + uint16_t payload_length = EXTRACT_16BITS(bp+4); + int hop_limit = bp[7]; + const char *next_hdr_txt = "Unknown"; + const char *hdr_type_txt = "Unknown"; + int hdr_size = -1; + + switch (next_hdr) { + case 0: next_hdr_txt = "Any"; break; + case 1: next_hdr_txt = "BTP-A"; break; + case 2: next_hdr_txt = "BTP-B"; break; + case 3: next_hdr_txt = "IPv6"; break; + } + + switch (hdr_type) { + case 0: hdr_type_txt = "Any"; break; + case 1: hdr_type_txt = "Beacon"; break; + case 2: hdr_type_txt = "GeoUnicast"; break; + case 3: switch (hdr_subtype) { + case 0: hdr_type_txt = "GeoAnycastCircle"; break; + case 1: hdr_type_txt = "GeoAnycastRect"; break; + case 2: hdr_type_txt = "GeoAnycastElipse"; break; + } + break; + case 4: switch (hdr_subtype) { + case 0: hdr_type_txt = "GeoBroadcastCircle"; break; + case 1: hdr_type_txt = "GeoBroadcastRect"; break; + case 2: hdr_type_txt = "GeoBroadcastElipse"; break; + } + break; + case 5: switch (hdr_subtype) { + case 0: hdr_type_txt = "TopoScopeBcast-SH"; break; + case 1: hdr_type_txt = "TopoScopeBcast-MH"; break; + } + break; + case 6: switch (hdr_subtype) { + case 0: hdr_type_txt = "LocService-Request"; break; + case 1: hdr_type_txt = "LocService-Reply"; break; + } + break; + } + + ND_PRINT((ndo, "v:%d ", version)); + ND_PRINT((ndo, "NH:%d-%s ", next_hdr, next_hdr_txt)); + ND_PRINT((ndo, "HT:%d-%d-%s ", hdr_type, hdr_subtype, hdr_type_txt)); + ND_PRINT((ndo, "HopLim:%d ", hop_limit)); + ND_PRINT((ndo, "Payload:%d ", payload_length)); + print_long_pos_vector(ndo, bp + 8); + + /* Skip Common Header */ + length -= 36; + bp += 36; + + /* Process Extended Headers */ + switch (hdr_type) { + case 0: /* Any */ + hdr_size = 0; + break; + case 1: /* Beacon */ + hdr_size = 0; + break; + case 2: /* GeoUnicast */ + break; + case 3: switch (hdr_subtype) { + case 0: /* GeoAnycastCircle */ + break; + case 1: /* GeoAnycastRect */ + break; + case 2: /* GeoAnycastElipse */ + break; + } + break; + case 4: switch (hdr_subtype) { + case 0: /* GeoBroadcastCircle */ + break; + case 1: /* GeoBroadcastRect */ + break; + case 2: /* GeoBroadcastElipse */ + break; + } + break; + case 5: switch (hdr_subtype) { + case 0: /* TopoScopeBcast-SH */ + hdr_size = 0; + break; + case 1: /* TopoScopeBcast-MH */ + hdr_size = 68 - 36; + break; + } + break; + case 6: switch (hdr_subtype) { + case 0: /* LocService-Request */ + break; + case 1: /* LocService-Reply */ + break; + } + break; + } + + /* Skip Extended headers */ + if (hdr_size >= 0) { + length -= hdr_size; + bp += hdr_size; + switch (next_hdr) { + case 0: /* Any */ + break; + case 1: + case 2: /* BTP A/B */ + print_btp(ndo, bp); + length -= 4; + bp += 4; + print_btp_body(ndo, bp, length); + break; + case 3: /* IPv6 */ + break; + } + } + } else { + ND_PRINT((ndo, "Malformed (small) ")); + } + + /* Print user data part */ + if (ndo->ndo_vflag) + ND_DEFAULTPRINT(bp, length); +} + + +/* + * Local Variables: + * c-style: whitesmith + * c-basic-offset: 8 + * End: + */ |