1 /* 2 * Copyright (c) 1988, 1989, 1990, 1991, 1992, 1993, 1994, 1995, 1996, 1997 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 * From: NetBSD: print-arcnet.c,v 1.2 2000/04/24 13:02:28 itojun Exp 22 */ 23 #ifndef lint 24 static const char rcsid[] _U_ = 25 "@(#) $Header: /tcpdump/master/tcpdump/print-arcnet.c,v 1.20 2005-04-06 21:32:38 mcr Exp $ (LBL)"; 26 #endif 27 28 #ifdef HAVE_CONFIG_H 29 #include "config.h" 30 #endif 31 32 #include <tcpdump-stdinc.h> 33 34 #include <stdio.h> 35 #include <pcap.h> 36 37 #include "interface.h" 38 #include "extract.h" 39 #include "arcnet.h" 40 41 static int arcnet_encap_print(u_char arctype, const u_char *p, 42 u_int length, u_int caplen); 43 44 static const struct tok arctypemap[] = { 45 { ARCTYPE_IP_OLD, "oldip" }, 46 { ARCTYPE_ARP_OLD, "oldarp" }, 47 { ARCTYPE_IP, "ip" }, 48 { ARCTYPE_ARP, "arp" }, 49 { ARCTYPE_REVARP, "rarp" }, 50 { ARCTYPE_ATALK, "atalk" }, 51 { ARCTYPE_BANIAN, "banyan" }, 52 { ARCTYPE_IPX, "ipx" }, 53 { ARCTYPE_INET6, "ipv6" }, 54 { ARCTYPE_DIAGNOSE, "diag" }, 55 { 0, 0 } 56 }; 57 58 static inline void 59 arcnet_print(const u_char *bp, u_int length, int phds, int flag, u_int seqid) 60 { 61 const struct arc_header *ap; 62 const char *arctypename; 63 64 65 ap = (const struct arc_header *)bp; 66 67 68 if (qflag) { 69 (void)printf("%02x %02x %d: ", 70 ap->arc_shost, 71 ap->arc_dhost, 72 length); 73 return; 74 } 75 76 arctypename = tok2str(arctypemap, "%02x", ap->arc_type); 77 78 if (!phds) { 79 (void)printf("%02x %02x %s %d: ", 80 ap->arc_shost, ap->arc_dhost, arctypename, 81 length); 82 return; 83 } 84 85 if (flag == 0) { 86 (void)printf("%02x %02x %s seqid %04x %d: ", 87 ap->arc_shost, ap->arc_dhost, arctypename, seqid, 88 length); 89 return; 90 } 91 92 if (flag & 1) 93 (void)printf("%02x %02x %s seqid %04x " 94 "(first of %d fragments) %d: ", 95 ap->arc_shost, ap->arc_dhost, arctypename, seqid, 96 (flag + 3) / 2, length); 97 else 98 (void)printf("%02x %02x %s seqid %04x " 99 "(fragment %d) %d: ", 100 ap->arc_shost, ap->arc_dhost, arctypename, seqid, 101 flag/2 + 1, length); 102 } 103 104 /* 105 * This is the top level routine of the printer. 'p' points 106 * to the ARCNET header of the packet, 'h->ts' is the timestamp, 107 * 'h->len' is the length of the packet off the wire, and 'h->caplen' 108 * is the number of bytes actually captured. 109 */ 110 u_int 111 arcnet_if_print(const struct pcap_pkthdr *h, const u_char *p) 112 { 113 u_int caplen = h->caplen; 114 u_int length = h->len; 115 const struct arc_header *ap; 116 117 int phds, flag = 0, archdrlen = 0; 118 u_int seqid = 0; 119 u_char arc_type; 120 121 if (caplen < ARC_HDRLEN) { 122 printf("[|arcnet]"); 123 return (caplen); 124 } 125 126 ap = (const struct arc_header *)p; 127 arc_type = ap->arc_type; 128 129 switch (arc_type) { 130 default: 131 phds = 1; 132 break; 133 case ARCTYPE_IP_OLD: 134 case ARCTYPE_ARP_OLD: 135 case ARCTYPE_DIAGNOSE: 136 phds = 0; 137 archdrlen = ARC_HDRLEN; 138 break; 139 } 140 141 if (phds) { 142 if (caplen < ARC_HDRNEWLEN) { 143 arcnet_print(p, length, 0, 0, 0); 144 printf("[|phds]"); 145 return (caplen); 146 } 147 148 if (ap->arc_flag == 0xff) { 149 if (caplen < ARC_HDRNEWLEN_EXC) { 150 arcnet_print(p, length, 0, 0, 0); 151 printf("[|phds extended]"); 152 return (caplen); 153 } 154 flag = ap->arc_flag2; 155 seqid = EXTRACT_16BITS(&ap->arc_seqid2); 156 archdrlen = ARC_HDRNEWLEN_EXC; 157 } else { 158 flag = ap->arc_flag; 159 seqid = EXTRACT_16BITS(&ap->arc_seqid); 160 archdrlen = ARC_HDRNEWLEN; 161 } 162 } 163 164 165 if (eflag) 166 arcnet_print(p, length, phds, flag, seqid); 167 168 /* 169 * Go past the ARCNET header. 170 */ 171 length -= archdrlen; 172 caplen -= archdrlen; 173 p += archdrlen; 174 175 if (phds && flag && (flag & 1) == 0) { 176 /* 177 * This is a middle fragment. 178 */ 179 return (archdrlen); 180 } 181 182 if (!arcnet_encap_print(arc_type, p, length, caplen)) 183 default_print(p, caplen); 184 185 return (archdrlen); 186 } 187 188 /* 189 * This is the top level routine of the printer. 'p' points 190 * to the ARCNET header of the packet, 'h->ts' is the timestamp, 191 * 'h->len' is the length of the packet off the wire, and 'h->caplen' 192 * is the number of bytes actually captured. It is quite similar 193 * to the non-Linux style printer except that Linux doesn't ever 194 * supply packets that look like exception frames, it always supplies 195 * reassembled packets rather than raw frames, and headers have an 196 * extra "offset" field between the src/dest and packet type. 197 */ 198 u_int 199 arcnet_linux_if_print(const struct pcap_pkthdr *h, const u_char *p) 200 { 201 u_int caplen = h->caplen; 202 u_int length = h->len; 203 const struct arc_linux_header *ap; 204 205 int archdrlen = 0; 206 u_char arc_type; 207 208 if (caplen < ARC_LINUX_HDRLEN) { 209 printf("[|arcnet]"); 210 return (caplen); 211 } 212 213 ap = (const struct arc_linux_header *)p; 214 arc_type = ap->arc_type; 215 216 switch (arc_type) { 217 default: 218 archdrlen = ARC_LINUX_HDRNEWLEN; 219 if (caplen < ARC_LINUX_HDRNEWLEN) { 220 printf("[|arcnet]"); 221 return (caplen); 222 } 223 break; 224 case ARCTYPE_IP_OLD: 225 case ARCTYPE_ARP_OLD: 226 case ARCTYPE_DIAGNOSE: 227 archdrlen = ARC_LINUX_HDRLEN; 228 break; 229 } 230 231 if (eflag) 232 arcnet_print(p, length, 0, 0, 0); 233 234 /* 235 * Go past the ARCNET header. 236 */ 237 length -= archdrlen; 238 caplen -= archdrlen; 239 p += archdrlen; 240 241 if (!arcnet_encap_print(arc_type, p, length, caplen)) 242 default_print(p, caplen); 243 244 return (archdrlen); 245 } 246 247 /* 248 * Prints the packet encapsulated in an ARCnet data field, 249 * given the ARCnet system code. 250 * 251 * Returns non-zero if it can do so, zero if the system code is unknown. 252 */ 253 254 255 static int 256 arcnet_encap_print(u_char arctype, const u_char *p, 257 u_int length, u_int caplen) 258 { 259 switch (arctype) { 260 261 case ARCTYPE_IP_OLD: 262 case ARCTYPE_IP: 263 ip_print(gndo, p, length); 264 return (1); 265 266 #ifdef INET6 267 case ARCTYPE_INET6: 268 ip6_print(gndo, p, length); 269 return (1); 270 #endif /*INET6*/ 271 272 case ARCTYPE_ARP_OLD: 273 case ARCTYPE_ARP: 274 case ARCTYPE_REVARP: 275 arp_print(gndo, p, length, caplen); 276 return (1); 277 278 case ARCTYPE_ATALK: /* XXX was this ever used? */ 279 if (vflag) 280 fputs("et1 ", stdout); 281 atalk_print(p, length); 282 return (1); 283 284 case ARCTYPE_IPX: 285 ipx_print(p, length); 286 return (1); 287 288 default: 289 return (0); 290 } 291 } 292 293 /* 294 * Local Variables: 295 * c-style: bsd 296 * End: 297 */ 298 299
