external/bsd/tcpdump/dist/print-ipx.c

   1 /*
   2  * Copyright (c) 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  * Format and print Novell IPX packets.
  22  * Contributed by Brad Parker (brad@fcr.com).
  23  */
  24
  25 #include <sys/cdefs.h>
  26 #ifndef lint
  27 __RCSID("$NetBSD: print-ipx.c,v 1.4 2014/11/20 03:05:03 christos Exp $");
  28 #endif
  29
  30 #define NETDISSECT_REWORKED
  31 #ifdef HAVE_CONFIG_H
  32 #include "config.h"
  33 #endif
  34
  35 #include <tcpdump-stdinc.h>
  36
  37 #include <stdio.h>
  38
  39 #include "interface.h"
  40 #include "addrtoname.h"
  41 #include "extract.h"
  42
  43 /* well-known sockets */
  44 #define IPX_SKT_NCP             0x0451
  45 #define IPX_SKT_SAP             0x0452
  46 #define IPX_SKT_RIP             0x0453
  47 #define IPX_SKT_NETBIOS         0x0455
  48 #define IPX_SKT_DIAGNOSTICS     0x0456
  49 #define IPX_SKT_NWLINK_DGM      0x0553  /* NWLink datagram, may contain SMB */
  50 #define IPX_SKT_EIGRP           0x85be  /* Cisco EIGRP over IPX */
  51
  52 /* IPX transport header */
  53 struct ipxHdr {
  54     uint16_t    cksum;          /* Checksum */
  55     uint16_t    length;         /* Length, in bytes, including header */
  56     uint8_t     tCtl;           /* Transport Control (i.e. hop count) */
  57     uint8_t     pType;          /* Packet Type (i.e. level 2 protocol) */
  58     uint16_t    dstNet[2];      /* destination net */
  59     uint8_t     dstNode[6];     /* destination node */
  60     uint16_t    dstSkt;         /* destination socket */
  61     uint16_t    srcNet[2];      /* source net */
  62     uint8_t     srcNode[6];     /* source node */
  63     uint16_t    srcSkt;         /* source socket */
  64 };
  65
  66 #define ipxSize 30
  67
  68 static const char *ipxaddr_string(uint32_t, const u_char *);
  69 static void ipx_decode(netdissect_options *, const struct ipxHdr *, const u_char *, u_int);
  70 static void ipx_sap_print(netdissect_options *, const u_short *, u_int);
  71 static void ipx_rip_print(netdissect_options *, const u_short *, u_int);
  72
  73 /*
  74  * Print IPX datagram packets.
  75  */
  76 void
  77 ipx_print(netdissect_options *ndo, const u_char *p, u_int length)
  78 {
  79         const struct ipxHdr *ipx = (const struct ipxHdr *)p;
  80
  81         if (!ndo->ndo_eflag)
  82                 ND_PRINT((ndo, "IPX "));
  83
  84         ND_TCHECK(ipx->srcSkt);
  85         ND_PRINT((ndo, "%s.%04x > ",
  86                      ipxaddr_string(EXTRACT_32BITS(ipx->srcNet), ipx->srcNode),
  87                      EXTRACT_16BITS(&ipx->srcSkt)));
  88
  89         ND_PRINT((ndo, "%s.%04x: ",
  90                      ipxaddr_string(EXTRACT_32BITS(ipx->dstNet), ipx->dstNode),
  91                      EXTRACT_16BITS(&ipx->dstSkt)));
  92
  93         /* take length from ipx header */
  94         ND_TCHECK(ipx->length);
  95         length = EXTRACT_16BITS(&ipx->length);
  96
  97         ipx_decode(ndo, ipx, (u_char *)ipx + ipxSize, length - ipxSize);
  98         return;
  99 trunc:
 100         ND_PRINT((ndo, "[|ipx %d]", length));
 101 }
 102
 103 static const char *
 104 ipxaddr_string(uint32_t net, const u_char *node)
 105 {
 106     static char line[256];
 107
 108     snprintf(line, sizeof(line), "%08x.%02x:%02x:%02x:%02x:%02x:%02x",
 109             net, node[0], node[1], node[2], node[3], node[4], node[5]);
 110
 111     return line;
 112 }
 113
 114 static void
 115 ipx_decode(netdissect_options *ndo, const struct ipxHdr *ipx, const u_char *datap, u_int length)
 116 {
 117     register u_short dstSkt;
 118
 119     dstSkt = EXTRACT_16BITS(&ipx->dstSkt);
 120     switch (dstSkt) {
 121       case IPX_SKT_NCP:
 122         ND_PRINT((ndo, "ipx-ncp %d", length));
 123         break;
 124       case IPX_SKT_SAP:
 125         ipx_sap_print(ndo, (u_short *)datap, length);
 126         break;
 127       case IPX_SKT_RIP:
 128         ipx_rip_print(ndo, (u_short *)datap, length);
 129         break;
 130       case IPX_SKT_NETBIOS:
 131         ND_PRINT((ndo, "ipx-netbios %d", length));
 132 #ifdef TCPDUMP_DO_SMB
 133         ipx_netbios_print(ndo, datap, length);
 134 #endif
 135         break;
 136       case IPX_SKT_DIAGNOSTICS:
 137         ND_PRINT((ndo, "ipx-diags %d", length));
 138         break;
 139       case IPX_SKT_NWLINK_DGM:
 140         ND_PRINT((ndo, "ipx-nwlink-dgm %d", length));
 141 #ifdef TCPDUMP_DO_SMB
 142         ipx_netbios_print(ndo, datap, length);
 143 #endif
 144         break;
 145       case IPX_SKT_EIGRP:
 146         eigrp_print(ndo, datap, length);
 147         break;
 148       default:
 149         ND_PRINT((ndo, "ipx-#%x %d", dstSkt, length));
 150         break;
 151     }
 152 }
 153
 154 static void
 155 ipx_sap_print(netdissect_options *ndo, const u_short *ipx, u_int length)
 156 {
 157     int command, i;
 158
 159     ND_TCHECK(ipx[0]);
 160     command = EXTRACT_16BITS(ipx);
 161     ipx++;
 162     length -= 2;
 163
 164     switch (command) {
 165       case 1:
 166       case 3:
 167         if (command == 1)
 168             ND_PRINT((ndo, "ipx-sap-req"));
 169         else
 170             ND_PRINT((ndo, "ipx-sap-nearest-req"));
 171
 172         ND_TCHECK(ipx[0]);
 173         ND_PRINT((ndo, " %s", ipxsap_string(htons(EXTRACT_16BITS(&ipx[0])))));
 174         break;
 175
 176       case 2:
 177       case 4:
 178         if (command == 2)
 179             ND_PRINT((ndo, "ipx-sap-resp"));
 180         else
 181             ND_PRINT((ndo, "ipx-sap-nearest-resp"));
 182
 183         for (i = 0; i < 8 && length > 0; i++) {
 184             ND_TCHECK(ipx[0]);
 185             ND_PRINT((ndo, " %s '", ipxsap_string(htons(EXTRACT_16BITS(&ipx[0])))));
 186             if (fn_printzp(ndo, (u_char *)&ipx[1], 48, ndo->ndo_snapend)) {
 187                 ND_PRINT((ndo, "'"));
 188                 goto trunc;
 189             }
 190             ND_TCHECK2(ipx[25], 10);
 191             ND_PRINT((ndo, "' addr %s",
 192                 ipxaddr_string(EXTRACT_32BITS(&ipx[25]), (u_char *)&ipx[27])));
 193             ipx += 32;
 194             length -= 64;
 195         }
 196         break;
 197       default:
 198         ND_PRINT((ndo, "ipx-sap-?%x", command));
 199         break;
 200     }
 201     return;
 202 trunc:
 203     ND_PRINT((ndo, "[|ipx %d]", length));
 204 }
 205
 206 static void
 207 ipx_rip_print(netdissect_options *ndo, const u_short *ipx, u_int length)
 208 {
 209     int command, i;
 210
 211     ND_TCHECK(ipx[0]);
 212     command = EXTRACT_16BITS(ipx);
 213     ipx++;
 214     length -= 2;
 215
 216     switch (command) {
 217       case 1:
 218         ND_PRINT((ndo, "ipx-rip-req"));
 219         if (length > 0) {
 220             ND_TCHECK(ipx[3]);
 221             ND_PRINT((ndo, " %08x/%d.%d", EXTRACT_32BITS(&ipx[0]),
 222                          EXTRACT_16BITS(&ipx[2]), EXTRACT_16BITS(&ipx[3])));
 223         }
 224         break;
 225       case 2:
 226         ND_PRINT((ndo, "ipx-rip-resp"));
 227         for (i = 0; i < 50 && length > 0; i++) {
 228             ND_TCHECK(ipx[3]);
 229             ND_PRINT((ndo, " %08x/%d.%d", EXTRACT_32BITS(&ipx[0]),
 230                          EXTRACT_16BITS(&ipx[2]), EXTRACT_16BITS(&ipx[3])));
 231
 232             ipx += 4;
 233             length -= 8;
 234         }
 235         break;
 236       default:
 237         ND_PRINT((ndo, "ipx-rip-?%x", command));
 238         break;
 239     }
 240     return;
 241 trunc:
 242     ND_PRINT((ndo, "[|ipx %d]", length));
 243 }