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