The Tcpdump Group git mirrors - tcpdump/blob - 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 #ifndef lint
  26 static const char rcsid[] _U_ =
  27     "@(#) $Header: /tcpdump/master/tcpdump/print-ipx.c,v 1.42 2005-05-06 08:26:44 guy Exp $";
  28 #endif
  29
  30 #ifdef HAVE_CONFIG_H
  31 #include "config.h"
  32 #endif
  33
  34 #include <tcpdump-stdinc.h>
  35
  36 #include <stdlib.h>
  37 #include <stdio.h>
  38 #include <string.h>
  39
  40 #include "interface.h"
  41 #include "addrtoname.h"
  42 #include "extract.h"
  43
  44 /* well-known sockets */
  45 #define IPX_SKT_NCP             0x0451
  46 #define IPX_SKT_SAP             0x0452
  47 #define IPX_SKT_RIP             0x0453
  48 #define IPX_SKT_NETBIOS         0x0455
  49 #define IPX_SKT_DIAGNOSTICS     0x0456
  50 #define IPX_SKT_NWLINK_DGM      0x0553  /* NWLink datagram, may contain SMB */
  51 #define IPX_SKT_EIGRP           0x85be  /* Cisco EIGRP over IPX */
  52
  53 /* IPX transport header */
  54 struct ipxHdr {
  55     u_int16_t   cksum;          /* Checksum */
  56     u_int16_t   length;         /* Length, in bytes, including header */
  57     u_int8_t    tCtl;           /* Transport Control (i.e. hop count) */
  58     u_int8_t    pType;          /* Packet Type (i.e. level 2 protocol) */
  59     u_int16_t   dstNet[2];      /* destination net */
  60     u_int8_t    dstNode[6];     /* destination node */
  61     u_int16_t   dstSkt;         /* destination socket */
  62     u_int16_t   srcNet[2];      /* source net */
  63     u_int8_t    srcNode[6];     /* source node */
  64     u_int16_t   srcSkt;         /* source socket */
  65 };
  66
  67 #define ipxSize 30
  68
  69 static const char *ipxaddr_string(u_int32_t, const u_char *);
  70 void ipx_decode(const struct ipxHdr *, const u_char *, u_int);
  71 void ipx_sap_print(const u_short *, u_int);
  72 void ipx_rip_print(const u_short *, u_int);
  73
  74 /*
  75  * Print IPX datagram packets.
  76  */
  77 void
  78 ipx_print(const u_char *p, u_int length)
  79 {
  80         const struct ipxHdr *ipx = (const struct ipxHdr *)p;
  81
  82         if (!eflag)
  83                 printf("IPX ");
  84
  85         TCHECK(ipx->srcSkt);
  86         (void)printf("%s.%04x > ",
  87                      ipxaddr_string(EXTRACT_32BITS(ipx->srcNet), ipx->srcNode),
  88                      EXTRACT_16BITS(&ipx->srcSkt));
  89
  90         (void)printf("%s.%04x: ",
  91                      ipxaddr_string(EXTRACT_32BITS(ipx->dstNet), ipx->dstNode),
  92                      EXTRACT_16BITS(&ipx->dstSkt));
  93
  94         /* take length from ipx header */
  95         TCHECK(ipx->length);
  96         length = EXTRACT_16BITS(&ipx->length);
  97
  98         ipx_decode(ipx, (u_char *)ipx + ipxSize, length - ipxSize);
  99         return;
 100 trunc:
 101         printf("[|ipx %d]", length);
 102 }
 103
 104 static const char *
 105 ipxaddr_string(u_int32_t net, const u_char *node)
 106 {
 107     static char line[256];
 108
 109     snprintf(line, sizeof(line), "%08x.%02x:%02x:%02x:%02x:%02x:%02x",
 110             net, node[0], node[1], node[2], node[3], node[4], node[5]);
 111
 112     return line;
 113 }
 114
 115 void
 116 ipx_decode(const struct ipxHdr *ipx, const u_char *datap, u_int length)
 117 {
 118     register u_short dstSkt;
 119
 120     dstSkt = EXTRACT_16BITS(&ipx->dstSkt);
 121     switch (dstSkt) {
 122       case IPX_SKT_NCP:
 123         (void)printf("ipx-ncp %d", length);
 124         break;
 125       case IPX_SKT_SAP:
 126         ipx_sap_print((u_short *)datap, length);
 127         break;
 128       case IPX_SKT_RIP:
 129         ipx_rip_print((u_short *)datap, length);
 130         break;
 131       case IPX_SKT_NETBIOS:
 132         (void)printf("ipx-netbios %d", length);
 133 #ifdef TCPDUMP_DO_SMB
 134         ipx_netbios_print(datap, length);
 135 #endif
 136         break;
 137       case IPX_SKT_DIAGNOSTICS:
 138         (void)printf("ipx-diags %d", length);
 139         break;
 140       case IPX_SKT_NWLINK_DGM:
 141         (void)printf("ipx-nwlink-dgm %d", length);
 142 #ifdef TCPDUMP_DO_SMB
 143         ipx_netbios_print(datap, length);
 144 #endif
 145         break;
 146       case IPX_SKT_EIGRP:
 147         eigrp_print(datap, length);
 148         break;
 149       default:
 150         (void)printf("ipx-#%x %d", dstSkt, length);
 151         break;
 152     }
 153 }
 154
 155 void
 156 ipx_sap_print(const u_short *ipx, u_int length)
 157 {
 158     int command, i;
 159
 160     TCHECK(ipx[0]);
 161     command = EXTRACT_16BITS(ipx);
 162     ipx++;
 163     length -= 2;
 164
 165     switch (command) {
 166       case 1:
 167       case 3:
 168         if (command == 1)
 169             (void)printf("ipx-sap-req");
 170         else
 171             (void)printf("ipx-sap-nearest-req");
 172
 173         TCHECK(ipx[0]);
 174         (void)printf(" %s", ipxsap_string(htons(EXTRACT_16BITS(&ipx[0]))));
 175         break;
 176
 177       case 2:
 178       case 4:
 179         if (command == 2)
 180             (void)printf("ipx-sap-resp");
 181         else
 182             (void)printf("ipx-sap-nearest-resp");
 183
 184         for (i = 0; i < 8 && length > 0; i++) {
 185             TCHECK(ipx[0]);
 186             (void)printf(" %s '", ipxsap_string(htons(EXTRACT_16BITS(&ipx[0]))));
 187             if (fn_printzp((u_char *)&ipx[1], 48, snapend)) {
 188                 printf("'");
 189                 goto trunc;
 190             }
 191             TCHECK2(ipx[25], 10);
 192             printf("' addr %s",
 193                 ipxaddr_string(EXTRACT_32BITS(&ipx[25]), (u_char *)&ipx[27]));
 194             ipx += 32;
 195             length -= 64;
 196         }
 197         break;
 198       default:
 199         (void)printf("ipx-sap-?%x", command);
 200         break;
 201     }
 202     return;
 203 trunc:
 204     printf("[|ipx %d]", length);
 205 }
 206
 207 void
 208 ipx_rip_print(const u_short *ipx, u_int length)
 209 {
 210     int command, i;
 211
 212     TCHECK(ipx[0]);
 213     command = EXTRACT_16BITS(ipx);
 214     ipx++;
 215     length -= 2;
 216
 217     switch (command) {
 218       case 1:
 219         (void)printf("ipx-rip-req");
 220         if (length > 0) {
 221             TCHECK(ipx[3]);
 222             (void)printf(" %08x/%d.%d", EXTRACT_32BITS(&ipx[0]),
 223                          EXTRACT_16BITS(&ipx[2]), EXTRACT_16BITS(&ipx[3]));
 224         }
 225         break;
 226       case 2:
 227         (void)printf("ipx-rip-resp");
 228         for (i = 0; i < 50 && length > 0; i++) {
 229             TCHECK(ipx[3]);
 230             (void)printf(" %08x/%d.%d", EXTRACT_32BITS(&ipx[0]),
 231                          EXTRACT_16BITS(&ipx[2]), EXTRACT_16BITS(&ipx[3]));
 232
 233             ipx += 4;
 234             length -= 8;
 235         }
 236         break;
 237       default:
 238         (void)printf("ipx-rip-?%x", command);
 239         break;
 240     }
 241     return;
 242 trunc:
 243     printf("[|ipx %d]", length);
 244 }