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[] =
  27     "@(#) $Header: /tcpdump/master/tcpdump/print-ipx.c,v 1.27 2000-09-29 04:58:41 guy Exp $";
  28 #endif
  29
  30 #ifdef HAVE_CONFIG_H
  31 #include "config.h"
  32 #endif
  33
  34 #include <sys/param.h>
  35 #include <sys/time.h>
  36 #include <sys/socket.h>
  37
  38 #include <netinet/in.h>
  39
  40 #include <stdlib.h>
  41 #include <stdio.h>
  42 #include <string.h>
  43
  44 #include "interface.h"
  45 #include "addrtoname.h"
  46 #include "ipx.h"
  47 #include "extract.h"
  48
  49
  50 static const char *ipxaddr_string(u_int32_t, const u_char *);
  51 void ipx_decode(const struct ipxHdr *, const u_char *, u_int);
  52 void ipx_sap_print(const u_short *, u_int);
  53 void ipx_rip_print(const u_short *, u_int);
  54
  55 /*
  56  * Print IPX datagram packets.
  57  */
  58 void
  59 ipx_print(const u_char *p, u_int length)
  60 {
  61         const struct ipxHdr *ipx = (const struct ipxHdr *)p;
  62
  63         TCHECK(ipx->srcSkt);
  64         (void)printf("%s.%x > ",
  65                      ipxaddr_string(EXTRACT_32BITS(ipx->srcNet), ipx->srcNode),
  66                      EXTRACT_16BITS(&ipx->srcSkt));
  67
  68         (void)printf("%s.%x:",
  69                      ipxaddr_string(EXTRACT_32BITS(ipx->dstNet), ipx->dstNode),
  70                      EXTRACT_16BITS(&ipx->dstSkt));
  71
  72         /* take length from ipx header */
  73         TCHECK(ipx->length);
  74         length = EXTRACT_16BITS(&ipx->length);
  75
  76         ipx_decode(ipx, (u_char *)ipx + ipxSize, length - ipxSize);
  77         return;
  78 trunc:
  79         printf("[|ipx %d]", length);
  80 }
  81
  82 static const char *
  83 ipxaddr_string(u_int32_t net, const u_char *node)
  84 {
  85     static char line[256];
  86
  87     snprintf(line, sizeof(line), "%x.%02x:%02x:%02x:%02x:%02x:%02x",
  88             net, node[0], node[1], node[2], node[3], node[4], node[5]);
  89
  90     return line;
  91 }
  92
  93 void
  94 ipx_decode(const struct ipxHdr *ipx, const u_char *datap, u_int length)
  95 {
  96     register u_short dstSkt;
  97
  98     dstSkt = EXTRACT_16BITS(&ipx->dstSkt);
  99     switch (dstSkt) {
 100       case IPX_SKT_NCP:
 101         (void)printf(" ipx-ncp %d", length);
 102         break;
 103       case IPX_SKT_SAP:
 104         ipx_sap_print((u_short *)datap, length);
 105         break;
 106       case IPX_SKT_RIP:
 107         ipx_rip_print((u_short *)datap, length);
 108         break;
 109       case IPX_SKT_NETBIOS:
 110         (void)printf(" ipx-netbios %d", length);
 111         break;
 112       case IPX_SKT_DIAGNOSTICS:
 113         (void)printf(" ipx-diags %d", length);
 114         break;
 115       default:
 116         (void)printf(" ipx-#%x %d", dstSkt, length);
 117         break;
 118     }
 119 }
 120
 121 void
 122 ipx_sap_print(const u_short *ipx, u_int length)
 123 {
 124     int command, i;
 125
 126     TCHECK(ipx[0]);
 127     command = EXTRACT_16BITS(ipx);
 128     ipx++;
 129     length -= 2;
 130
 131     switch (command) {
 132       case 1:
 133       case 3:
 134         if (command == 1)
 135             (void)printf("ipx-sap-req");
 136         else
 137             (void)printf("ipx-sap-nearest-req");
 138
 139         if (length > 0) {
 140             TCHECK(ipx[1]);
 141             (void)printf(" %x '", EXTRACT_16BITS(&ipx[0]));
 142             fn_print((u_char *)&ipx[1], (u_char *)&ipx[1] + 48);
 143             putchar('\'');
 144         }
 145         break;
 146
 147       case 2:
 148       case 4:
 149         if (command == 2)
 150             (void)printf("ipx-sap-resp");
 151         else
 152             (void)printf("ipx-sap-nearest-resp");
 153
 154         for (i = 0; i < 8 && length > 0; i++) {
 155             TCHECK2(ipx[27], 1);
 156             (void)printf(" %x '", EXTRACT_16BITS(&ipx[0]));
 157             fn_print((u_char *)&ipx[1], (u_char *)&ipx[1] + 48);
 158             printf("' addr %s",
 159                 ipxaddr_string(EXTRACT_32BITS(&ipx[25]), (u_char *)&ipx[27]));
 160             ipx += 32;
 161             length -= 64;
 162         }
 163         break;
 164       default:
 165             (void)printf("ipx-sap-?%x", command);
 166         break;
 167     }
 168         return;
 169 trunc:
 170         printf("[|ipx %d]", length);
 171 }
 172
 173 void
 174 ipx_rip_print(const u_short *ipx, u_int length)
 175 {
 176     int command, i;
 177
 178     TCHECK(ipx[0]);
 179     command = EXTRACT_16BITS(ipx);
 180     ipx++;
 181     length -= 2;
 182
 183     switch (command) {
 184       case 1:
 185         (void)printf("ipx-rip-req");
 186         if (length > 0) {
 187             TCHECK(ipx[3]);
 188             (void)printf(" %u/%d.%d", EXTRACT_32BITS(&ipx[0]),
 189                          EXTRACT_16BITS(&ipx[2]), EXTRACT_16BITS(&ipx[3]));
 190         }
 191         break;
 192       case 2:
 193         (void)printf("ipx-rip-resp");
 194         for (i = 0; i < 50 && length > 0; i++) {
 195             TCHECK(ipx[3]);
 196             (void)printf(" %u/%d.%d", EXTRACT_32BITS(&ipx[0]),
 197                          EXTRACT_16BITS(&ipx[2]), EXTRACT_16BITS(&ipx[3]));
 198
 199             ipx += 4;
 200             length -= 8;
 201         }
 202         break;
 203       default:
 204             (void)printf("ipx-rip-?%x", command);
 205     }
 206         return;
 207 trunc:
 208         printf("[|ipx %d]", length);
 209 }
 210