1 /* 2 * Copyright (c) 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 * $FreeBSD$ 22 */ 23 #ifndef lint 24 static const char rcsid[] _U_ = 25 "@(#) $Header: /tcpdump/master/tcpdump/print-atm.c,v 1.38.2.6 2006/01/25 13:27:24 hannes 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 #include <string.h> 37 38 #include "interface.h" 39 #include "extract.h" 40 #include "addrtoname.h" 41 #include "ethertype.h" 42 #include "atm.h" 43 #include "atmuni31.h" 44 #include "llc.h" 45 46 #include "ether.h" 47 48 struct tok oam_f_values[] = { 49 { OAMF4SC, "OAM F4 (segment)" }, 50 { OAMF4EC, "OAM F4 (end)" }, 51 { 0, NULL } 52 }; 53 54 struct tok oam_celltype_values[] = { 55 { 0x1, "Fault Management" }, 56 { 0x2, "Performance Management" }, 57 { 0x8, "activate/deactivate" }, 58 { 0xf, "System Management" }, 59 { 0, NULL } 60 }; 61 62 struct tok oam_fm_functype_values[] = { 63 { 0x0, "AIS" }, 64 { 0x1, "RDI" }, 65 { 0x4, "Continuity Check" }, 66 { 0x8, "Loopback" }, 67 { 0, NULL } 68 }; 69 70 struct tok oam_pm_functype_values[] = { 71 { 0x0, "Forward Monitoring" }, 72 { 0x1, "Backward Reporting" }, 73 { 0x2, "Monitoring and Reporting" }, 74 { 0, NULL } 75 }; 76 77 struct tok oam_ad_functype_values[] = { 78 { 0x0, "Performance Monitoring" }, 79 { 0x1, "Continuity Check" }, 80 { 0, NULL } 81 }; 82 83 static const struct tok *oam_functype_values[16] = { 84 NULL, 85 oam_fm_functype_values, /* 1 */ 86 oam_pm_functype_values, /* 2 */ 87 NULL, 88 NULL, 89 NULL, 90 NULL, 91 NULL, 92 oam_ad_functype_values, /* 8 */ 93 NULL, 94 NULL, 95 NULL, 96 NULL, 97 NULL, 98 NULL, 99 NULL 100 }; 101 102 /* 103 * Print an RFC 1483 LLC-encapsulated ATM frame. 104 */ 105 static void 106 atm_llc_print(const u_char *p, int length, int caplen) 107 { 108 u_short extracted_ethertype; 109 110 if (!llc_print(p, length, caplen, NULL, NULL, 111 &extracted_ethertype)) { 112 /* ether_type not known, print raw packet */ 113 if (extracted_ethertype) { 114 printf("(LLC %s) ", 115 etherproto_string(htons(extracted_ethertype))); 116 } 117 if (!suppress_default_print) 118 default_print(p, caplen); 119 } 120 } 121 122 /* 123 * Given a SAP value, generate the LLC header value for a UI packet 124 * with that SAP as the source and destination SAP. 125 */ 126 #define LLC_UI_HDR(sap) ((sap)<<16 | (sap<<8) | 0x03) 127 128 /* 129 * This is the top level routine of the printer. 'p' points 130 * to the LLC/SNAP header of the packet, 'h->ts' is the timestamp, 131 * 'h->len' is the length of the packet off the wire, and 'h->caplen' 132 * is the number of bytes actually captured. 133 */ 134 u_int 135 atm_if_print(const struct pcap_pkthdr *h, const u_char *p) 136 { 137 u_int caplen = h->caplen; 138 u_int length = h->len; 139 u_int32_t llchdr; 140 u_int hdrlen = 0; 141 142 if (caplen < 8) { 143 printf("[|atm]"); 144 return (caplen); 145 } 146 147 /* Cisco Style NLPID ? */ 148 if (*p == LLC_UI) { 149 if (eflag) 150 printf("CNLPID "); 151 isoclns_print(p+1, length-1, caplen-1); 152 return hdrlen; 153 } 154 155 /* 156 * Extract the presumed LLC header into a variable, for quick 157 * testing. 158 * Then check for a header that's neither a header for a SNAP 159 * packet nor an RFC 2684 routed NLPID-formatted PDU nor 160 * an 802.2-but-no-SNAP IP packet. 161 */ 162 llchdr = EXTRACT_24BITS(p); 163 if (llchdr != LLC_UI_HDR(LLCSAP_SNAP) && 164 llchdr != LLC_UI_HDR(LLCSAP_ISONS) && 165 llchdr != LLC_UI_HDR(LLCSAP_IP)) { 166 /* 167 * XXX - assume 802.6 MAC header from Fore driver. 168 * 169 * Unfortunately, the above list doesn't check for 170 * all known SAPs, doesn't check for headers where 171 * the source and destination SAP aren't the same, 172 * and doesn't check for non-UI frames. It also 173 * runs the risk of an 802.6 MAC header that happens 174 * to begin with one of those values being 175 * incorrectly treated as an 802.2 header. 176 * 177 * So is that Fore driver still around? And, if so, 178 * is it still putting 802.6 MAC headers on ATM 179 * packets? If so, could it be changed to use a 180 * new DLT_IEEE802_6 value if we added it? 181 */ 182 if (eflag) 183 printf("%08x%08x %08x%08x ", 184 EXTRACT_32BITS(p), 185 EXTRACT_32BITS(p+4), 186 EXTRACT_32BITS(p+8), 187 EXTRACT_32BITS(p+12)); 188 p += 20; 189 length -= 20; 190 caplen -= 20; 191 hdrlen += 20; 192 } 193 atm_llc_print(p, length, caplen); 194 return (hdrlen); 195 } 196 197 /* 198 * ATM signalling. 199 */ 200 static struct tok msgtype2str[] = { 201 { CALL_PROCEED, "Call_proceeding" }, 202 { CONNECT, "Connect" }, 203 { CONNECT_ACK, "Connect_ack" }, 204 { SETUP, "Setup" }, 205 { RELEASE, "Release" }, 206 { RELEASE_DONE, "Release_complete" }, 207 { RESTART, "Restart" }, 208 { RESTART_ACK, "Restart_ack" }, 209 { STATUS, "Status" }, 210 { STATUS_ENQ, "Status_enquiry" }, 211 { ADD_PARTY, "Add_party" }, 212 { ADD_PARTY_ACK, "Add_party_ack" }, 213 { ADD_PARTY_REJ, "Add_party_reject" }, 214 { DROP_PARTY, "Drop_party" }, 215 { DROP_PARTY_ACK, "Drop_party_ack" }, 216 { 0, NULL } 217 }; 218 219 static void 220 sig_print(const u_char *p, int caplen) 221 { 222 bpf_u_int32 call_ref; 223 224 if (caplen < PROTO_POS) { 225 printf("[|atm]"); 226 return; 227 } 228 if (p[PROTO_POS] == Q2931) { 229 /* 230 * protocol:Q.2931 for User to Network Interface 231 * (UNI 3.1) signalling 232 */ 233 printf("Q.2931"); 234 if (caplen < MSG_TYPE_POS) { 235 printf(" [|atm]"); 236 return; 237 } 238 printf(":%s ", 239 tok2str(msgtype2str, "msgtype#%d", p[MSG_TYPE_POS])); 240 241 if (caplen < CALL_REF_POS+3) { 242 printf("[|atm]"); 243 return; 244 } 245 call_ref = EXTRACT_24BITS(&p[CALL_REF_POS]); 246 printf("CALL_REF:0x%06x", call_ref); 247 } else { 248 /* SCCOP with some unknown protocol atop it */ 249 printf("SSCOP, proto %d ", p[PROTO_POS]); 250 } 251 } 252 253 /* 254 * Print an ATM PDU (such as an AAL5 PDU). 255 */ 256 void 257 atm_print(u_int vpi, u_int vci, u_int traftype, const u_char *p, u_int length, 258 u_int caplen) 259 { 260 if (eflag) 261 printf("VPI:%u VCI:%u ", vpi, vci); 262 263 if (vpi == 0) { 264 switch (vci) { 265 266 case PPC: 267 sig_print(p, caplen); 268 return; 269 270 case BCC: 271 printf("broadcast sig: "); 272 return; 273 274 case OAMF4SC: /* fall through */ 275 case OAMF4EC: 276 oam_print(p, length, ATM_OAM_HEC); 277 return; 278 279 case METAC: 280 printf("meta: "); 281 return; 282 283 case ILMIC: 284 printf("ilmi: "); 285 snmp_print(p, length); 286 return; 287 } 288 } 289 290 switch (traftype) { 291 292 case ATM_LLC: 293 default: 294 /* 295 * Assumes traffic is LLC if unknown. 296 */ 297 atm_llc_print(p, length, caplen); 298 break; 299 300 case ATM_LANE: 301 lane_print(p, length, caplen); 302 break; 303 } 304 } 305 306 int 307 oam_print (const u_char *p, u_int length, u_int hec) { 308 309 u_int32_t cell_header; 310 u_int16_t cell_type, func_type,vpi,vci,payload,clp; 311 312 cell_header = EXTRACT_32BITS(p+hec); 313 cell_type = ((*(p+4+hec))>>4) & 0x0f; 314 func_type = *(p+4+hec) & 0x0f; 315 316 vpi = (cell_header>>20)&0xff; 317 vci = (cell_header>>4)&0xffff; 318 payload = (cell_header>>1)&0x7; 319 clp = cell_header&0x1; 320 321 printf("%s, vpi %u, vci %u, payload %u, clp %u, ", 322 tok2str(oam_f_values, "OAM F5", vci), 323 vpi, vci, payload, clp); 324 325 printf("cell-type %s (%u)", 326 tok2str(oam_celltype_values, "unknown", cell_type), 327 cell_type); 328 329 if (oam_functype_values[cell_type] == NULL) 330 printf(", func-type unknown (%u)", func_type); 331 else 332 printf(", func-type %s (%u)", 333 bittok2str(oam_functype_values[cell_type],"none",func_type), 334 func_type); 335 336 printf(", length %u",length); 337 return 1; 338 } 339