/* \summary: ISO CALM FAST and ETSI GeoNetworking printer */
-#ifdef HAVE_CONFIG_H
-#include "config.h"
-#endif
+#include <config.h>
-#include <netdissect-stdinc.h>
+#include "netdissect-stdinc.h"
+#define ND_LONGJMP_FROM_TCHECK
#include "netdissect.h"
#include "extract.h"
#include "addrtoname.h"
static void
print_btp_body(netdissect_options *ndo,
- const u_char *bp)
+ const u_char *bp)
{
- u_int version;
u_int msg_type;
- const char *msg_type_str;
- /* Assuming ItsDpuHeader */
- version = EXTRACT_U_1(bp);
- msg_type = EXTRACT_U_1(bp + 1);
- msg_type_str = tok2str(msg_type_values, "unknown (%u)", msg_type);
+ /* Assuming ItsPduHeader */
+ ND_PRINT("; ItsPduHeader v:%u", GET_U_1(bp));
- ND_PRINT("; ItsPduHeader v:%u t:%u-%s", version, msg_type, msg_type_str);
+ msg_type = GET_U_1(bp + 1);
+ ND_PRINT(" t:%u-%s", msg_type,
+ tok2str(msg_type_values, "unknown (%u)", msg_type));
}
+/* EN 302 636-5-1 V2.2.1 Section 7.2: BTP-A header */
static void
print_btp(netdissect_options *ndo,
- const u_char *bp)
+ const u_char *bp)
{
- uint16_t dest = EXTRACT_BE_U_2(bp + 0);
- uint16_t src = EXTRACT_BE_U_2(bp + 2);
- ND_PRINT("; BTP Dst:%u Src:%u", dest, src);
+ ND_PRINT("; BTP Dst:%u", GET_BE_U_2(bp + 0));
+ ND_PRINT(" Src:%u", GET_BE_U_2(bp + 2));
}
-static int
+static void
print_long_pos_vector(netdissect_options *ndo,
- const u_char *bp)
+ const u_char *bp)
{
- uint32_t lat, lon;
-
- if (!ND_TTEST_LEN(bp, GEONET_ADDR_LEN))
- return (-1);
- ND_PRINT("GN_ADDR:%s ", linkaddr_string (ndo, bp, 0, GEONET_ADDR_LEN));
-
- if (!ND_TTEST_8(bp + 12))
- return (-1);
- lat = EXTRACT_BE_U_4(bp + 12);
- ND_PRINT("lat:%u ", lat);
- lon = EXTRACT_BE_U_4(bp + 16);
- ND_PRINT("lon:%u", lon);
- return (0);
+ ND_PRINT("GN_ADDR:%s ", GET_LINKADDR_STRING(bp, LINKADDR_OTHER, GEONET_ADDR_LEN));
+ ND_PRINT("lat:%u ", GET_BE_U_4(bp + 12));
+ ND_PRINT("lon:%u", GET_BE_U_4(bp + 16));
}
const char *hdr_type_txt = "Unknown";
int hdr_size = -1;
+ ndo->ndo_protocol = "geonet";
ND_PRINT("GeoNet ");
if (src != NULL)
ND_PRINT("src:%s", (src->addr_string)(ndo, src->addr));
ND_PRINT("; ");
/* Process Common Header */
- if (length < 36)
+ if (length < 36) {
+ ND_PRINT(" (common header length %u < 36)", length);
goto invalid;
+ }
- ND_TCHECK_8(bp);
- version = EXTRACT_U_1(bp) >> 4;
- next_hdr = EXTRACT_U_1(bp) & 0x0f;
- hdr_type = EXTRACT_U_1(bp + 1) >> 4;
- hdr_subtype = EXTRACT_U_1(bp + 1) & 0x0f;
- payload_length = EXTRACT_BE_U_2(bp + 4);
- hop_limit = EXTRACT_U_1(bp + 7);
+ version = GET_U_1(bp) >> 4;
+ next_hdr = GET_U_1(bp) & 0x0f;
+ hdr_type = GET_U_1(bp + 1) >> 4;
+ hdr_subtype = GET_U_1(bp + 1) & 0x0f;
+ payload_length = GET_BE_U_2(bp + 4);
+ hop_limit = GET_U_1(bp + 7);
switch (next_hdr) {
case 0: next_hdr_txt = "Any"; break;
ND_PRINT("HT:%u-%u-%s ", hdr_type, hdr_subtype, hdr_type_txt);
ND_PRINT("HopLim:%u ", hop_limit);
ND_PRINT("Payload:%u ", payload_length);
- if (print_long_pos_vector(ndo, bp + 8) == -1)
- goto trunc;
+ print_long_pos_vector(ndo, bp + 8);
/* Skip Common Header */
+ ND_TCHECK_LEN(bp, 36);
length -= 36;
bp += 36;
/* Skip Extended headers */
if (hdr_size >= 0) {
- if (length < (u_int)hdr_size)
+ if (length < (u_int)hdr_size) {
+ ND_PRINT(" (header size %d > %u)", hdr_size, length);
goto invalid;
+ }
ND_TCHECK_LEN(bp, hdr_size);
length -= hdr_size;
bp += hdr_size;
break;
case 1:
case 2: /* BTP A/B */
- if (length < 4)
+ if (length < 4) {
+ ND_PRINT(" (BTP length %u < 4)", length);
goto invalid;
- ND_TCHECK_4(bp);
+ }
print_btp(ndo, bp);
length -= 4;
bp += 4;
* or was that just not
* reporting genuine errors?
*/
- ND_TCHECK_2(bp);
print_btp_body(ndo, bp);
}
break;
return;
invalid:
- ND_PRINT(" Malformed (small) ");
+ nd_print_invalid(ndo);
/* XXX - print the remaining data as hex? */
- return;
-
-trunc:
- ND_PRINT("[|geonet]");
}
-
-
-/*
- * Local Variables:
- * c-style: whitesmith
- * c-basic-offset: 8
- * End:
- */