dist/tcpdump/print-atm.c

   1 /*      $NetBSD$        */
   2
   3 /*
   4  * Copyright (c) 1994, 1995, 1996, 1997
   5  *      The Regents of the University of California.  All rights reserved.
   6  *
   7  * Redistribution and use in source and binary forms, with or without
   8  * modification, are permitted provided that: (1) source code distributions
   9  * retain the above copyright notice and this paragraph in its entirety, (2)
  10  * distributions including binary code include the above copyright notice and
  11  * this paragraph in its entirety in the documentation or other materials
  12  * provided with the distribution, and (3) all advertising materials mentioning
  13  * features or use of this software display the following acknowledgement:
  14  * ``This product includes software developed by the University of California,
  15  * Lawrence Berkeley Laboratory and its contributors.'' Neither the name of
  16  * the University nor the names of its contributors may be used to endorse
  17  * or promote products derived from this software without specific prior
  18  * written permission.
  19  * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR IMPLIED
  20  * WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF
  21  * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
  22  */
  23 #include <sys/cdefs.h>
  24 #ifndef lint
  25 #if 0
  26 static const char rcsid[] _U_ =
  27     "@(#) Header: /tcpdump/master/tcpdump/print-atm.c,v 1.38.2.6 2006/01/25 13:27:24 hannes Exp (LBL)";
  28 #else
  29 __RCSID("$NetBSD: tcpdump2rcsid.ex,v 1.1 2001/06/25 20:09:58 itojun Exp $");
  30 #endif
  31 #endif
  32
  33 #ifdef HAVE_CONFIG_H
  34 #include "config.h"
  35 #endif
  36
  37 #include <tcpdump-stdinc.h>
  38
  39 #include <stdio.h>
  40 #include <pcap.h>
  41 #include <string.h>
  42
  43 #include "interface.h"
  44 #include "extract.h"
  45 #include "addrtoname.h"
  46 #include "ethertype.h"
  47 #include "atm.h"
  48 #include "atmuni31.h"
  49 #include "llc.h"
  50
  51 #include "ether.h"
  52
  53 struct tok oam_f_values[] = {
  54     { OAMF4SC, "OAM F4 (segment)" },
  55     { OAMF4EC, "OAM F4 (end)" },
  56     { 0, NULL }
  57 };
  58
  59 struct tok oam_celltype_values[] = {
  60     { 0x1, "Fault Management" },
  61     { 0x2, "Performance Management" },
  62     { 0x8, "activate/deactivate" },
  63     { 0xf, "System Management" },
  64     { 0, NULL }
  65 };
  66
  67 struct tok oam_fm_functype_values[] = {
  68     { 0x0, "AIS" },
  69     { 0x1, "RDI" },
  70     { 0x4, "Continuity Check" },
  71     { 0x8, "Loopback" },
  72     { 0, NULL }
  73 };
  74
  75 struct tok oam_pm_functype_values[] = {
  76     { 0x0, "Forward Monitoring" },
  77     { 0x1, "Backward Reporting" },
  78     { 0x2, "Monitoring and Reporting" },
  79     { 0, NULL }
  80 };
  81
  82 struct tok oam_ad_functype_values[] = {
  83     { 0x0, "Performance Monitoring" },
  84     { 0x1, "Continuity Check" },
  85     { 0, NULL }
  86 };
  87
  88 static const struct tok *oam_functype_values[16] = {
  89     NULL,
  90     oam_fm_functype_values, /* 1 */
  91     oam_pm_functype_values, /* 2 */
  92     NULL,
  93     NULL,
  94     NULL,
  95     NULL,
  96     NULL,
  97     oam_ad_functype_values, /* 8 */
  98     NULL,
  99     NULL,
 100     NULL,
 101     NULL,
 102     NULL,
 103     NULL,
 104     NULL
 105 };
 106
 107 /*
 108  * Print an RFC 1483 LLC-encapsulated ATM frame.
 109  */
 110 static void
 111 atm_llc_print(const u_char *p, int length, int caplen)
 112 {
 113         u_short extracted_ethertype;
 114
 115         if (!llc_print(p, length, caplen, NULL, NULL,
 116             &extracted_ethertype)) {
 117                 /* ether_type not known, print raw packet */
 118                 if (extracted_ethertype) {
 119                         printf("(LLC %s) ",
 120                 etherproto_string(htons(extracted_ethertype)));
 121                 }
 122                 if (!suppress_default_print)
 123                         default_print(p, caplen);
 124         }
 125 }
 126
 127 /*
 128  * Given a SAP value, generate the LLC header value for a UI packet
 129  * with that SAP as the source and destination SAP.
 130  */
 131 #define LLC_UI_HDR(sap) ((sap)<<16 | (sap<<8) | 0x03)
 132
 133 /*
 134  * This is the top level routine of the printer.  'p' points
 135  * to the LLC/SNAP header of the packet, 'h->ts' is the timestamp,
 136  * 'h->len' is the length of the packet off the wire, and 'h->caplen'
 137  * is the number of bytes actually captured.
 138  */
 139 u_int
 140 atm_if_print(const struct pcap_pkthdr *h, const u_char *p)
 141 {
 142         u_int caplen = h->caplen;
 143         u_int length = h->len;
 144         u_int32_t llchdr;
 145         u_int hdrlen = 0;
 146
 147         if (caplen < 8) {
 148                 printf("[|atm]");
 149                 return (caplen);
 150         }
 151
 152         /* Cisco Style NLPID ? */
 153         if (*p == LLC_UI) {
 154             if (eflag)
 155                 printf("CNLPID ");
 156             isoclns_print(p+1, length-1, caplen-1);
 157             return hdrlen;
 158         }
 159
 160         /*
 161          * Extract the presumed LLC header into a variable, for quick
 162          * testing.
 163          * Then check for a header that's neither a header for a SNAP
 164          * packet nor an RFC 2684 routed NLPID-formatted PDU nor
 165          * an 802.2-but-no-SNAP IP packet.
 166          */
 167         llchdr = EXTRACT_24BITS(p);
 168         if (llchdr != LLC_UI_HDR(LLCSAP_SNAP) &&
 169             llchdr != LLC_UI_HDR(LLCSAP_ISONS) &&
 170             llchdr != LLC_UI_HDR(LLCSAP_IP)) {
 171                 /*
 172                  * XXX - assume 802.6 MAC header from Fore driver.
 173                  *
 174                  * Unfortunately, the above list doesn't check for
 175                  * all known SAPs, doesn't check for headers where
 176                  * the source and destination SAP aren't the same,
 177                  * and doesn't check for non-UI frames.  It also
 178                  * runs the risk of an 802.6 MAC header that happens
 179                  * to begin with one of those values being
 180                  * incorrectly treated as an 802.2 header.
 181                  *
 182                  * So is that Fore driver still around?  And, if so,
 183                  * is it still putting 802.6 MAC headers on ATM
 184                  * packets?  If so, could it be changed to use a
 185                  * new DLT_IEEE802_6 value if we added it?
 186                  */
 187                 if (eflag)
 188                         printf("%08x%08x %08x%08x ",
 189                                EXTRACT_32BITS(p),
 190                                EXTRACT_32BITS(p+4),
 191                                EXTRACT_32BITS(p+8),
 192                                EXTRACT_32BITS(p+12));
 193                 p += 20;
 194                 length -= 20;
 195                 caplen -= 20;
 196                 hdrlen += 20;
 197         }
 198         atm_llc_print(p, length, caplen);
 199         return (hdrlen);
 200 }
 201
 202 /*
 203  * ATM signalling.
 204  */
 205 static struct tok msgtype2str[] = {
 206         { CALL_PROCEED,         "Call_proceeding" },
 207         { CONNECT,              "Connect" },
 208         { CONNECT_ACK,          "Connect_ack" },
 209         { SETUP,                "Setup" },
 210         { RELEASE,              "Release" },
 211         { RELEASE_DONE,         "Release_complete" },
 212         { RESTART,              "Restart" },
 213         { RESTART_ACK,          "Restart_ack" },
 214         { STATUS,               "Status" },
 215         { STATUS_ENQ,           "Status_enquiry" },
 216         { ADD_PARTY,            "Add_party" },
 217         { ADD_PARTY_ACK,        "Add_party_ack" },
 218         { ADD_PARTY_REJ,        "Add_party_reject" },
 219         { DROP_PARTY,           "Drop_party" },
 220         { DROP_PARTY_ACK,       "Drop_party_ack" },
 221         { 0,                    NULL }
 222 };
 223
 224 static void
 225 sig_print(const u_char *p, int caplen)
 226 {
 227         bpf_u_int32 call_ref;
 228
 229         if (caplen < PROTO_POS) {
 230                 printf("[|atm]");
 231                 return;
 232         }
 233         if (p[PROTO_POS] == Q2931) {
 234                 /*
 235                  * protocol:Q.2931 for User to Network Interface
 236                  * (UNI 3.1) signalling
 237                  */
 238                 printf("Q.2931");
 239                 if (caplen < MSG_TYPE_POS) {
 240                         printf(" [|atm]");
 241                         return;
 242                 }
 243                 printf(":%s ",
 244                     tok2str(msgtype2str, "msgtype#%d", p[MSG_TYPE_POS]));
 245
 246                 if (caplen < CALL_REF_POS+3) {
 247                         printf("[|atm]");
 248                         return;
 249                 }
 250                 call_ref = EXTRACT_24BITS(&p[CALL_REF_POS]);
 251                 printf("CALL_REF:0x%06x", call_ref);
 252         } else {
 253                 /* SCCOP with some unknown protocol atop it */
 254                 printf("SSCOP, proto %d ", p[PROTO_POS]);
 255         }
 256 }
 257
 258 /*
 259  * Print an ATM PDU (such as an AAL5 PDU).
 260  */
 261 void
 262 atm_print(u_int vpi, u_int vci, u_int traftype, const u_char *p, u_int length,
 263     u_int caplen)
 264 {
 265         if (eflag)
 266                 printf("VPI:%u VCI:%u ", vpi, vci);
 267
 268         if (vpi == 0) {
 269                 switch (vci) {
 270
 271                 case PPC:
 272                         sig_print(p, caplen);
 273                         return;
 274
 275                 case BCC:
 276                         printf("broadcast sig: ");
 277                         return;
 278
 279                 case OAMF4SC: /* fall through */
 280                 case OAMF4EC:
 281                         oam_print(p, length, ATM_OAM_HEC);
 282                         return;
 283
 284                 case METAC:
 285                         printf("meta: ");
 286                         return;
 287
 288                 case ILMIC:
 289                         printf("ilmi: ");
 290                         snmp_print(p, length);
 291                         return;
 292                 }
 293         }
 294
 295         switch (traftype) {
 296
 297         case ATM_LLC:
 298         default:
 299                 /*
 300                  * Assumes traffic is LLC if unknown.
 301                  */
 302                 atm_llc_print(p, length, caplen);
 303                 break;
 304
 305         case ATM_LANE:
 306                 lane_print(p, length, caplen);
 307                 break;
 308         }
 309 }
 310
 311 int
 312 oam_print (const u_char *p, u_int length, u_int hec) {
 313
 314     u_int32_t cell_header;
 315     u_int16_t cell_type, func_type,vpi,vci,payload,clp;
 316
 317     cell_header = EXTRACT_32BITS(p+hec);
 318     cell_type = ((*(p+4+hec))>>4) & 0x0f;
 319     func_type = *(p+4+hec) & 0x0f;
 320
 321     vpi = (cell_header>>20)&0xff;
 322     vci = (cell_header>>4)&0xffff;
 323     payload = (cell_header>>1)&0x7;
 324     clp = cell_header&0x1;
 325
 326     printf("%s, vpi %u, vci %u, payload %u, clp %u, ",
 327            tok2str(oam_f_values, "OAM F5", vci),
 328            vpi, vci, payload, clp);
 329
 330     printf("cell-type %s (%u)",
 331            tok2str(oam_celltype_values, "unknown", cell_type),
 332            cell_type);
 333
 334     if (oam_functype_values[cell_type] == NULL)
 335         printf(", func-type unknown (%u)", func_type);
 336     else
 337         printf(", func-type %s (%u)",
 338                bittok2str(oam_functype_values[cell_type],"none",func_type),
 339                func_type);
 340
 341     printf(", length %u",length);
 342     return 1;
 343 }