| /* |
| * Copyright (c) 1988, 1989, 1990, 1991, 1992, 1993, 1994, 1995, 1996 |
| * The Regents of the University of California. All rights reserved. |
| * |
| * 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, (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, and (3) all advertising materials mentioning |
| * features or use of this software display the following acknowledgement: |
| * ``This product includes software developed by the University of California, |
| * Lawrence Berkeley Laboratory and its contributors.'' Neither the name of |
| * the University nor the names of its contributors may be used to endorse |
| * or promote products derived from this software without specific prior |
| * written permission. |
| * 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. |
| * |
| * Hacked version of print-ether.c Larry Lile <lile@stdio.com> |
| * |
| * Further tweaked to more closely resemble print-fddi.c |
| * Guy Harris <guy@alum.mit.edu> |
| */ |
| #ifndef lint |
| static const char rcsid[] _U_ = |
| "@(#) $Header: /tcpdump/master/tcpdump/print-token.c,v 1.27 2005-11-13 12:12:43 guy Exp $"; |
| #endif |
| |
| #ifdef HAVE_CONFIG_H |
| #include "config.h" |
| #endif |
| |
| #include <tcpdump-stdinc.h> |
| |
| #include <pcap.h> |
| #include <stdio.h> |
| #include <string.h> |
| |
| #include "interface.h" |
| #include "extract.h" |
| #include "addrtoname.h" |
| #include "ethertype.h" |
| |
| #include "ether.h" |
| #include "token.h" |
| |
| /* Extract src, dst addresses */ |
| static inline void |
| extract_token_addrs(const struct token_header *trp, char *fsrc, char *fdst) |
| { |
| memcpy(fdst, (const char *)trp->token_dhost, 6); |
| memcpy(fsrc, (const char *)trp->token_shost, 6); |
| } |
| |
| /* |
| * Print the TR MAC header |
| */ |
| static inline void |
| token_hdr_print(register const struct token_header *trp, register u_int length, |
| register const u_char *fsrc, register const u_char *fdst) |
| { |
| const char *srcname, *dstname; |
| |
| srcname = etheraddr_string(fsrc); |
| dstname = etheraddr_string(fdst); |
| |
| if (vflag) |
| (void) printf("%02x %02x %s %s %d: ", |
| trp->token_ac, |
| trp->token_fc, |
| srcname, dstname, |
| length); |
| else |
| printf("%s %s %d: ", srcname, dstname, length); |
| } |
| |
| static const char *broadcast_indicator[] = { |
| "Non-Broadcast", "Non-Broadcast", |
| "Non-Broadcast", "Non-Broadcast", |
| "All-routes", "All-routes", |
| "Single-route", "Single-route" |
| }; |
| |
| static const char *direction[] = { |
| "Forward", "Backward" |
| }; |
| |
| static const char *largest_frame[] = { |
| "516", |
| "1500", |
| "2052", |
| "4472", |
| "8144", |
| "11407", |
| "17800", |
| "??" |
| }; |
| |
| u_int |
| token_print(const u_char *p, u_int length, u_int caplen) |
| { |
| const struct token_header *trp; |
| u_short extracted_ethertype; |
| struct ether_header ehdr; |
| u_int route_len = 0, hdr_len = TOKEN_HDRLEN; |
| int seg; |
| |
| trp = (const struct token_header *)p; |
| |
| if (caplen < TOKEN_HDRLEN) { |
| printf("[|token-ring]"); |
| return hdr_len; |
| } |
| |
| /* |
| * Get the TR addresses into a canonical form |
| */ |
| extract_token_addrs(trp, (char*)ESRC(&ehdr), (char*)EDST(&ehdr)); |
| |
| /* Adjust for source routing information in the MAC header */ |
| if (IS_SOURCE_ROUTED(trp)) { |
| /* Clear source-routed bit */ |
| *ESRC(&ehdr) &= 0x7f; |
| |
| if (eflag) |
| token_hdr_print(trp, length, ESRC(&ehdr), EDST(&ehdr)); |
| |
| if (caplen < TOKEN_HDRLEN + 2) { |
| printf("[|token-ring]"); |
| return hdr_len; |
| } |
| route_len = RIF_LENGTH(trp); |
| hdr_len += route_len; |
| if (caplen < hdr_len) { |
| printf("[|token-ring]"); |
| return hdr_len; |
| } |
| if (vflag) { |
| printf("%s ", broadcast_indicator[BROADCAST(trp)]); |
| printf("%s", direction[DIRECTION(trp)]); |
| |
| for (seg = 0; seg < SEGMENT_COUNT(trp); seg++) |
| printf(" [%d:%d]", RING_NUMBER(trp, seg), |
| BRIDGE_NUMBER(trp, seg)); |
| } else { |
| printf("rt = %x", EXTRACT_16BITS(&trp->token_rcf)); |
| |
| for (seg = 0; seg < SEGMENT_COUNT(trp); seg++) |
| printf(":%x", EXTRACT_16BITS(&trp->token_rseg[seg])); |
| } |
| printf(" (%s) ", largest_frame[LARGEST_FRAME(trp)]); |
| } else { |
| if (eflag) |
| token_hdr_print(trp, length, ESRC(&ehdr), EDST(&ehdr)); |
| } |
| |
| /* Skip over token ring MAC header and routing information */ |
| length -= hdr_len; |
| p += hdr_len; |
| caplen -= hdr_len; |
| |
| /* Frame Control field determines interpretation of packet */ |
| if (FRAME_TYPE(trp) == TOKEN_FC_LLC) { |
| /* Try to print the LLC-layer header & higher layers */ |
| if (llc_print(p, length, caplen, ESRC(&ehdr), EDST(&ehdr), |
| &extracted_ethertype) == 0) { |
| /* ether_type not known, print raw packet */ |
| if (!eflag) |
| token_hdr_print(trp, |
| length + TOKEN_HDRLEN + route_len, |
| ESRC(&ehdr), EDST(&ehdr)); |
| if (extracted_ethertype) { |
| printf("(LLC %s) ", |
| etherproto_string(htons(extracted_ethertype))); |
| } |
| if (!suppress_default_print) |
| default_print(p, caplen); |
| } |
| } else { |
| /* Some kinds of TR packet we cannot handle intelligently */ |
| /* XXX - dissect MAC packets if frame type is 0 */ |
| if (!eflag) |
| token_hdr_print(trp, length + TOKEN_HDRLEN + route_len, |
| ESRC(&ehdr), EDST(&ehdr)); |
| if (!suppress_default_print) |
| default_print(p, caplen); |
| } |
| return (hdr_len); |
| } |
| |
| /* |
| * This is the top level routine of the printer. 'p' points |
| * to the TR header of the packet, 'h->ts' is the timestamp, |
| * 'h->len' is the length of the packet off the wire, and 'h->caplen' |
| * is the number of bytes actually captured. |
| */ |
| u_int |
| token_if_print(const struct pcap_pkthdr *h, const u_char *p) |
| { |
| return (token_print(p, h->len, h->caplen)); |
| } |