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 1.26 2000-09-23 08:54:33 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 #include <netinet/in_systm.h>
  40
  41 #include <stdlib.h>
  42 #include <stdio.h>
  43 #include <string.h>
  44
  45 #include "interface.h"
  46 #include "addrtoname.h"
  47 #include "ipx.h"
  48 #include "extract.h"
  49
  50
  51 static const char *ipxaddr_string(u_int32_t, const u_char *);
  52 void ipx_decode(const struct ipxHdr *, const u_char *, u_int);
  53 void ipx_sap_print(const u_short *, u_int);
  54 void ipx_rip_print(const u_short *, u_int);
  55
  56 /*
  57  * Print IPX datagram packets.
  58  */
  59 void
  60 ipx_print(const u_char *p, u_int length)
  61 {
  62         const struct ipxHdr *ipx = (const struct ipxHdr *)p;
  63
  64         TCHECK(ipx->srcSkt);
  65         (void)printf("%s.%x > ",
  66                      ipxaddr_string(EXTRACT_32BITS(ipx->srcNet), ipx->srcNode),
  67                      EXTRACT_16BITS(&ipx->srcSkt));
  68
  69         (void)printf("%s.%x:",
  70                      ipxaddr_string(EXTRACT_32BITS(ipx->dstNet), ipx->dstNode),
  71                      EXTRACT_16BITS(&ipx->dstSkt));
  72
  73         /* take length from ipx header */
  74         TCHECK(ipx->length);
  75         length = EXTRACT_16BITS(&ipx->length);
  76
  77         ipx_decode(ipx, (u_char *)ipx + ipxSize, length - ipxSize);
  78         return;
  79 trunc:
  80         printf("[|ipx %d]", length);
  81 }
  82
  83 static const char *
  84 ipxaddr_string(u_int32_t net, const u_char *node)
  85 {
  86     static char line[256];
  87
  88     snprintf(line, sizeof(line), "%x.%02x:%02x:%02x:%02x:%02x:%02x",
  89             net, node[0], node[1], node[2], node[3], node[4], node[5]);
  90
  91     return line;
  92 }
  93
  94 void
  95 ipx_decode(const struct ipxHdr *ipx, const u_char *datap, u_int length)
  96 {
  97     register u_short dstSkt;
  98
  99     dstSkt = EXTRACT_16BITS(&ipx->dstSkt);
 100     switch (dstSkt) {
 101       case IPX_SKT_NCP:
 102         (void)printf(" ipx-ncp %d", length);
 103         break;
 104       case IPX_SKT_SAP:
 105         ipx_sap_print((u_short *)datap, length);
 106         break;
 107       case IPX_SKT_RIP:
 108         ipx_rip_print((u_short *)datap, length);
 109         break;
 110       case IPX_SKT_NETBIOS:
 111         (void)printf(" ipx-netbios %d", length);
 112         break;
 113       case IPX_SKT_DIAGNOSTICS:
 114         (void)printf(" ipx-diags %d", length);
 115         break;
 116       default:
 117         (void)printf(" ipx-#%x %d", dstSkt, length);
 118         break;
 119     }
 120 }
 121
 122 void
 123 ipx_sap_print(const u_short *ipx, u_int length)
 124 {
 125     int command, i;
 126
 127     TCHECK(ipx[0]);
 128     command = EXTRACT_16BITS(ipx);
 129     ipx++;
 130     length -= 2;
 131
 132     switch (command) {
 133       case 1:
 134       case 3:
 135         if (command == 1)
 136             (void)printf("ipx-sap-req");
 137         else
 138             (void)printf("ipx-sap-nearest-req");
 139
 140         if (length > 0) {
 141             TCHECK(ipx[1]);
 142             (void)printf(" %x '", EXTRACT_16BITS(&ipx[0]));
 143             fn_print((u_char *)&ipx[1], (u_char *)&ipx[1] + 48);
 144             putchar('\'');
 145         }
 146         break;
 147
 148       case 2:
 149       case 4:
 150         if (command == 2)
 151             (void)printf("ipx-sap-resp");
 152         else
 153             (void)printf("ipx-sap-nearest-resp");
 154
 155         for (i = 0; i < 8 && length > 0; i++) {
 156             TCHECK2(ipx[27], 1);
 157             (void)printf(" %x '", EXTRACT_16BITS(&ipx[0]));
 158             fn_print((u_char *)&ipx[1], (u_char *)&ipx[1] + 48);
 159             printf("' addr %s",
 160                 ipxaddr_string(EXTRACT_32BITS(&ipx[25]), (u_char *)&ipx[27]));
 161             ipx += 32;
 162             length -= 64;
 163         }
 164         break;
 165       default:
 166             (void)printf("ipx-sap-?%x", command);
 167         break;
 168     }
 169         return;
 170 trunc:
 171         printf("[|ipx %d]", length);
 172 }
 173
 174 void
 175 ipx_rip_print(const u_short *ipx, u_int length)
 176 {
 177     int command, i;
 178
 179     TCHECK(ipx[0]);
 180     command = EXTRACT_16BITS(ipx);
 181     ipx++;
 182     length -= 2;
 183
 184     switch (command) {
 185       case 1:
 186         (void)printf("ipx-rip-req");
 187         if (length > 0) {
 188             TCHECK(ipx[3]);
 189             (void)printf(" %u/%d.%d", EXTRACT_32BITS(&ipx[0]),
 190                          EXTRACT_16BITS(&ipx[2]), EXTRACT_16BITS(&ipx[3]));
 191         }
 192         break;
 193       case 2:
 194         (void)printf("ipx-rip-resp");
 195         for (i = 0; i < 50 && length > 0; i++) {
 196             TCHECK(ipx[3]);
 197             (void)printf(" %u/%d.%d", EXTRACT_32BITS(&ipx[0]),
 198                          EXTRACT_16BITS(&ipx[2]), EXTRACT_16BITS(&ipx[3]));
 199
 200             ipx += 4;
 201             length -= 8;
 202         }
 203         break;
 204       default:
 205             (void)printf("ipx-rip-?%x", command);
 206     }
 207         return;
 208 trunc:
 209         printf("[|ipx %d]", length);
 210 }
 211