diff options
Diffstat (limited to 'print-lane.c')
| -rw-r--r-- | print-lane.c | 110 |
1 files changed, 110 insertions, 0 deletions
diff --git a/print-lane.c b/print-lane.c new file mode 100644 index 0000000..c5fa33b --- /dev/null +++ b/print-lane.c @@ -0,0 +1,110 @@ +/* + * Marko Kiiskila carnil@cs.tut.fi + * + * Tampere University of Technology - Telecommunications Laboratory + * + * Permission to use, copy, modify and distribute this + * software and its documentation is hereby granted, + * provided that both the copyright notice and this + * permission notice appear in all copies of the software, + * derivative works or modified versions, and any portions + * thereof, that both notices appear in supporting + * documentation, and that the use of this software is + * acknowledged in any publications resulting from using + * the software. + * + * TUT ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS" + * CONDITION AND DISCLAIMS ANY LIABILITY OF ANY KIND FOR + * ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS + * SOFTWARE. + * + */ + +/* \summary: ATM LANE printer */ + +#ifdef HAVE_CONFIG_H +#include <config.h> +#endif + +#include "netdissect-stdinc.h" + +#define ND_LONGJMP_FROM_TCHECK +#include "netdissect.h" +#include "extract.h" + +struct lecdatahdr_8023 { + nd_uint16_t le_header; + nd_mac_addr h_dest; + nd_mac_addr h_source; + nd_uint16_t h_type; +}; + +struct lane_controlhdr { + nd_uint16_t lec_header; + nd_uint8_t lec_proto; + nd_uint8_t lec_vers; + nd_uint16_t lec_opcode; +}; + +static const struct tok lecop2str[] = { + { 0x0001, "configure request" }, + { 0x0101, "configure response" }, + { 0x0002, "join request" }, + { 0x0102, "join response" }, + { 0x0003, "ready query" }, + { 0x0103, "ready indication" }, + { 0x0004, "register request" }, + { 0x0104, "register response" }, + { 0x0005, "unregister request" }, + { 0x0105, "unregister response" }, + { 0x0006, "ARP request" }, + { 0x0106, "ARP response" }, + { 0x0007, "flush request" }, + { 0x0107, "flush response" }, + { 0x0008, "NARP request" }, + { 0x0009, "topology request" }, + { 0, NULL } +}; + +static void +lane_hdr_print(netdissect_options *ndo, const u_char *bp) +{ + ND_PRINT("lecid:%x ", GET_BE_U_2(bp)); +} + +/* + * This assumes 802.3, not 802.5, LAN emulation. + */ +void +lane_print(netdissect_options *ndo, const u_char *p, u_int length, u_int caplen) +{ + const struct lane_controlhdr *lec; + + ndo->ndo_protocol = "lane"; + + lec = (const struct lane_controlhdr *)p; + if (GET_BE_U_2(lec->lec_header) == 0xff00) { + /* + * LE Control. + */ + ND_PRINT("lec: proto %x vers %x %s", + GET_U_1(lec->lec_proto), + GET_U_1(lec->lec_vers), + tok2str(lecop2str, "opcode-#%u", GET_BE_U_2(lec->lec_opcode))); + return; + } + + /* + * Go past the LE header. + */ + ND_TCHECK_2(p); /* Needed */ + length -= 2; + caplen -= 2; + p += 2; + + /* + * Now print the encapsulated frame, under the assumption + * that it's an Ethernet frame. + */ + ether_print(ndo, p, length, caplen, lane_hdr_print, p - 2); +} |