X-Git-Url: https://git.tcpdump.org/tcpdump/blobdiff_plain/8b67f771343e94182b048b0cae3ffe164dc37bb9..refs/heads/master:/print-lane.c diff --git a/print-lane.c b/print-lane.c index 0cbab331..3836b066 100644 --- a/print-lane.c +++ b/print-lane.c @@ -1,6 +1,6 @@ /* - * Marko Kiiskila carnil@cs.tut.fi - * + * Marko Kiiskila carnil@cs.tut.fi + * * Tampere University of Technology - Telecommunications Laboratory * * Permission to use, copy, modify and distribute this @@ -12,127 +12,97 @@ * 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. - * + * */ -#ifndef lint -static const char rcsid[] = - "@(#) $Header: /tcpdump/master/tcpdump/print-lane.c,v 1.8 2000-09-28 06:43:02 guy Exp $ (LBL)"; -#endif - -#ifdef HAVE_CONFIG_H -#include "config.h" -#endif - -#include -#include -#include -#include - - -#include -#include - -#include -#include - -#include "interface.h" -#include "addrtoname.h" -#include "ether.h" -#include "lane.h" - -static inline void -lane_print(register const u_char *bp, int length) +/* \summary: ATM LANE printer */ + +#include + +#include "netdissect-stdinc.h" + +#define ND_LONGJMP_FROM_TCHECK +#include "netdissect.h" +#include "extract.h" + +struct lecdatahdr_8023 { + nd_uint16_t le_header; + nd_mac48 h_dest; + nd_mac48 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) { - register const struct lecdatahdr_8023 *ep; - - ep = (const struct lecdatahdr_8023 *)bp; - if (qflag) - (void)printf("lecid:%d %s %s %d: ", - ntohs(ep->le_header), - etheraddr_string(ep->h_source), - etheraddr_string(ep->h_dest), - length); - else - (void)printf("lecid:%d %s %s %s %d: ", - ntohs(ep->le_header), - etheraddr_string(ep->h_source), - etheraddr_string(ep->h_dest), - etherproto_string(ep->h_type), - length); + ND_PRINT("lecid:%x ", GET_BE_U_2(bp)); } /* - * This is the top level routine of the printer. 'p' is the points - * to the ether header of the packet, 'h->tv' is the timestamp, - * 'h->length' is the length of the packet off the wire, and 'h->caplen' - * is the number of bytes actually captured. + * This assumes 802.3, not 802.5, LAN emulation. */ void -lane_if_print(u_char *user, const struct pcap_pkthdr *h, const u_char *p) +lane_print(netdissect_options *ndo, const u_char *p, u_int length, u_int caplen) { - int caplen = h->caplen; - int length = h->len; - struct lecdatahdr_8023 *ep; - u_short ether_type; - u_short extracted_ethertype; - - ts_print(&h->ts); - - if (caplen < sizeof(struct lecdatahdr_8023)) { - printf("[|lane]"); - goto out; + 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; } - if (eflag) - lane_print(p, length); - /* - * Some printers want to get back at the ethernet addresses, - * and/or check that they're not walking off the end of the packet. - * Rather than pass them all the way down, we set these globals. + * Go past the LE header. */ - packetp = p; - snapend = p + caplen; - - length -= sizeof(struct lecdatahdr_8023); - caplen -= sizeof(struct lecdatahdr_8023); - ep = (struct lecdatahdr_8023 *)p; - p += sizeof(struct lecdatahdr_8023); - - ether_type = ntohs(ep->h_type); + ND_TCHECK_2(p); /* Needed */ + length -= 2; + caplen -= 2; + p += 2; /* - * Is it (gag) an 802.3 encapsulation? + * Now print the encapsulated frame, under the assumption + * that it's an Ethernet frame. */ - extracted_ethertype = 0; - if (ether_type < ETHERMTU) { - /* Try to print the LLC-layer header & higher layers */ - if (llc_print(p, length, caplen, ep->h_source,ep->h_dest)==0) { - /* ether_type not known, print raw packet */ - if (!eflag) - lane_print((u_char *)ep, length); - if (extracted_ethertype) { - printf("(LLC %s) ", - etherproto_string(htons(extracted_ethertype))); - } - if (!xflag && !qflag) - default_print(p, caplen); - } - } else if (ether_encap_print(ether_type, p, length, caplen) == 0) { - /* ether_type not known, print raw packet */ - if (!eflag) - lane_print((u_char *)ep, length + sizeof(*ep)); - if (!xflag && !qflag) - default_print(p, caplen); - } - if (xflag) - default_print(p, caplen); - out: - putchar('\n'); + ether_print(ndo, p, length, caplen, lane_hdr_print, p - 2); }