The Android Open Source Project | 2949f58 | 2009-03-03 19:30:46 -0800 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (c) 1988, 1989, 1990, 1991, 1992, 1993, 1994, 1995, 1996 |
| 3 | * The Regents of the University of California. All rights reserved. |
| 4 | * |
| 5 | * Redistribution and use in source and binary forms, with or without |
| 6 | * modification, are permitted provided that: (1) source code distributions |
| 7 | * retain the above copyright notice and this paragraph in its entirety, (2) |
| 8 | * distributions including binary code include the above copyright notice and |
| 9 | * this paragraph in its entirety in the documentation or other materials |
| 10 | * provided with the distribution, and (3) all advertising materials mentioning |
| 11 | * features or use of this software display the following acknowledgement: |
| 12 | * ``This product includes software developed by the University of California, |
| 13 | * Lawrence Berkeley Laboratory and its contributors.'' Neither the name of |
| 14 | * the University nor the names of its contributors may be used to endorse |
| 15 | * or promote products derived from this software without specific prior |
| 16 | * written permission. |
| 17 | * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR IMPLIED |
| 18 | * WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF |
| 19 | * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. |
| 20 | * |
| 21 | * Hacked version of print-ether.c Larry Lile <lile@stdio.com> |
| 22 | * |
| 23 | * Further tweaked to more closely resemble print-fddi.c |
| 24 | * Guy Harris <guy@alum.mit.edu> |
| 25 | */ |
| 26 | #ifndef lint |
| 27 | static const char rcsid[] _U_ = |
JP Abgrall | 53f17a9 | 2014-02-12 14:02:41 -0800 | [diff] [blame] | 28 | "@(#) $Header: /tcpdump/master/tcpdump/print-token.c,v 1.27 2005-11-13 12:12:43 guy Exp $"; |
The Android Open Source Project | 2949f58 | 2009-03-03 19:30:46 -0800 | [diff] [blame] | 29 | #endif |
| 30 | |
| 31 | #ifdef HAVE_CONFIG_H |
| 32 | #include "config.h" |
| 33 | #endif |
| 34 | |
| 35 | #include <tcpdump-stdinc.h> |
| 36 | |
| 37 | #include <pcap.h> |
| 38 | #include <stdio.h> |
| 39 | #include <string.h> |
| 40 | |
| 41 | #include "interface.h" |
JP Abgrall | 53f17a9 | 2014-02-12 14:02:41 -0800 | [diff] [blame] | 42 | #include "extract.h" |
The Android Open Source Project | 2949f58 | 2009-03-03 19:30:46 -0800 | [diff] [blame] | 43 | #include "addrtoname.h" |
| 44 | #include "ethertype.h" |
| 45 | |
| 46 | #include "ether.h" |
| 47 | #include "token.h" |
| 48 | |
| 49 | /* Extract src, dst addresses */ |
| 50 | static inline void |
| 51 | extract_token_addrs(const struct token_header *trp, char *fsrc, char *fdst) |
| 52 | { |
| 53 | memcpy(fdst, (const char *)trp->token_dhost, 6); |
| 54 | memcpy(fsrc, (const char *)trp->token_shost, 6); |
| 55 | } |
| 56 | |
| 57 | /* |
| 58 | * Print the TR MAC header |
| 59 | */ |
| 60 | static inline void |
| 61 | token_hdr_print(register const struct token_header *trp, register u_int length, |
| 62 | register const u_char *fsrc, register const u_char *fdst) |
| 63 | { |
| 64 | const char *srcname, *dstname; |
| 65 | |
| 66 | srcname = etheraddr_string(fsrc); |
| 67 | dstname = etheraddr_string(fdst); |
| 68 | |
| 69 | if (vflag) |
| 70 | (void) printf("%02x %02x %s %s %d: ", |
| 71 | trp->token_ac, |
| 72 | trp->token_fc, |
| 73 | srcname, dstname, |
| 74 | length); |
| 75 | else |
| 76 | printf("%s %s %d: ", srcname, dstname, length); |
| 77 | } |
| 78 | |
| 79 | static const char *broadcast_indicator[] = { |
| 80 | "Non-Broadcast", "Non-Broadcast", |
| 81 | "Non-Broadcast", "Non-Broadcast", |
| 82 | "All-routes", "All-routes", |
| 83 | "Single-route", "Single-route" |
| 84 | }; |
| 85 | |
| 86 | static const char *direction[] = { |
| 87 | "Forward", "Backward" |
| 88 | }; |
| 89 | |
| 90 | static const char *largest_frame[] = { |
| 91 | "516", |
| 92 | "1500", |
| 93 | "2052", |
| 94 | "4472", |
| 95 | "8144", |
| 96 | "11407", |
| 97 | "17800", |
| 98 | "??" |
| 99 | }; |
| 100 | |
| 101 | u_int |
| 102 | token_print(const u_char *p, u_int length, u_int caplen) |
| 103 | { |
| 104 | const struct token_header *trp; |
| 105 | u_short extracted_ethertype; |
| 106 | struct ether_header ehdr; |
| 107 | u_int route_len = 0, hdr_len = TOKEN_HDRLEN; |
| 108 | int seg; |
| 109 | |
| 110 | trp = (const struct token_header *)p; |
| 111 | |
| 112 | if (caplen < TOKEN_HDRLEN) { |
| 113 | printf("[|token-ring]"); |
| 114 | return hdr_len; |
| 115 | } |
| 116 | |
| 117 | /* |
| 118 | * Get the TR addresses into a canonical form |
| 119 | */ |
| 120 | extract_token_addrs(trp, (char*)ESRC(&ehdr), (char*)EDST(&ehdr)); |
| 121 | |
| 122 | /* Adjust for source routing information in the MAC header */ |
| 123 | if (IS_SOURCE_ROUTED(trp)) { |
| 124 | /* Clear source-routed bit */ |
| 125 | *ESRC(&ehdr) &= 0x7f; |
| 126 | |
| 127 | if (eflag) |
| 128 | token_hdr_print(trp, length, ESRC(&ehdr), EDST(&ehdr)); |
| 129 | |
JP Abgrall | 53f17a9 | 2014-02-12 14:02:41 -0800 | [diff] [blame] | 130 | if (caplen < TOKEN_HDRLEN + 2) { |
| 131 | printf("[|token-ring]"); |
| 132 | return hdr_len; |
| 133 | } |
The Android Open Source Project | 2949f58 | 2009-03-03 19:30:46 -0800 | [diff] [blame] | 134 | route_len = RIF_LENGTH(trp); |
JP Abgrall | 53f17a9 | 2014-02-12 14:02:41 -0800 | [diff] [blame] | 135 | hdr_len += route_len; |
| 136 | if (caplen < hdr_len) { |
| 137 | printf("[|token-ring]"); |
| 138 | return hdr_len; |
| 139 | } |
The Android Open Source Project | 2949f58 | 2009-03-03 19:30:46 -0800 | [diff] [blame] | 140 | if (vflag) { |
| 141 | printf("%s ", broadcast_indicator[BROADCAST(trp)]); |
| 142 | printf("%s", direction[DIRECTION(trp)]); |
| 143 | |
| 144 | for (seg = 0; seg < SEGMENT_COUNT(trp); seg++) |
| 145 | printf(" [%d:%d]", RING_NUMBER(trp, seg), |
| 146 | BRIDGE_NUMBER(trp, seg)); |
| 147 | } else { |
JP Abgrall | 53f17a9 | 2014-02-12 14:02:41 -0800 | [diff] [blame] | 148 | printf("rt = %x", EXTRACT_16BITS(&trp->token_rcf)); |
The Android Open Source Project | 2949f58 | 2009-03-03 19:30:46 -0800 | [diff] [blame] | 149 | |
| 150 | for (seg = 0; seg < SEGMENT_COUNT(trp); seg++) |
JP Abgrall | 53f17a9 | 2014-02-12 14:02:41 -0800 | [diff] [blame] | 151 | printf(":%x", EXTRACT_16BITS(&trp->token_rseg[seg])); |
The Android Open Source Project | 2949f58 | 2009-03-03 19:30:46 -0800 | [diff] [blame] | 152 | } |
| 153 | printf(" (%s) ", largest_frame[LARGEST_FRAME(trp)]); |
| 154 | } else { |
| 155 | if (eflag) |
| 156 | token_hdr_print(trp, length, ESRC(&ehdr), EDST(&ehdr)); |
| 157 | } |
| 158 | |
| 159 | /* Skip over token ring MAC header and routing information */ |
The Android Open Source Project | 2949f58 | 2009-03-03 19:30:46 -0800 | [diff] [blame] | 160 | length -= hdr_len; |
| 161 | p += hdr_len; |
| 162 | caplen -= hdr_len; |
| 163 | |
| 164 | /* Frame Control field determines interpretation of packet */ |
| 165 | if (FRAME_TYPE(trp) == TOKEN_FC_LLC) { |
| 166 | /* Try to print the LLC-layer header & higher layers */ |
| 167 | if (llc_print(p, length, caplen, ESRC(&ehdr), EDST(&ehdr), |
| 168 | &extracted_ethertype) == 0) { |
| 169 | /* ether_type not known, print raw packet */ |
| 170 | if (!eflag) |
| 171 | token_hdr_print(trp, |
| 172 | length + TOKEN_HDRLEN + route_len, |
| 173 | ESRC(&ehdr), EDST(&ehdr)); |
| 174 | if (extracted_ethertype) { |
| 175 | printf("(LLC %s) ", |
| 176 | etherproto_string(htons(extracted_ethertype))); |
| 177 | } |
| 178 | if (!suppress_default_print) |
| 179 | default_print(p, caplen); |
| 180 | } |
| 181 | } else { |
| 182 | /* Some kinds of TR packet we cannot handle intelligently */ |
| 183 | /* XXX - dissect MAC packets if frame type is 0 */ |
| 184 | if (!eflag) |
| 185 | token_hdr_print(trp, length + TOKEN_HDRLEN + route_len, |
| 186 | ESRC(&ehdr), EDST(&ehdr)); |
| 187 | if (!suppress_default_print) |
| 188 | default_print(p, caplen); |
| 189 | } |
| 190 | return (hdr_len); |
| 191 | } |
| 192 | |
| 193 | /* |
| 194 | * This is the top level routine of the printer. 'p' points |
| 195 | * to the TR header of the packet, 'h->ts' is the timestamp, |
| 196 | * 'h->len' is the length of the packet off the wire, and 'h->caplen' |
| 197 | * is the number of bytes actually captured. |
| 198 | */ |
| 199 | u_int |
| 200 | token_if_print(const struct pcap_pkthdr *h, const u_char *p) |
| 201 | { |
| 202 | return (token_print(p, h->len, h->caplen)); |
| 203 | } |