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      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 (at) 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 "ipx.h"
     43 #include "extract.h"
     44 
     45 
     46 static const char *ipxaddr_string(u_int32_t, const u_char *);
     47 void ipx_decode(const struct ipxHdr *, const u_char *, u_int);
     48 void ipx_sap_print(const u_short *, u_int);
     49 void ipx_rip_print(const u_short *, u_int);
     50 
     51 /*
     52  * Print IPX datagram packets.
     53  */
     54 void
     55 ipx_print(const u_char *p, u_int length)
     56 {
     57 	const struct ipxHdr *ipx = (const struct ipxHdr *)p;
     58 
     59 	if (!eflag)
     60 		printf("IPX ");
     61 
     62 	TCHECK(ipx->srcSkt);
     63 	(void)printf("%s.%04x > ",
     64 		     ipxaddr_string(EXTRACT_32BITS(ipx->srcNet), ipx->srcNode),
     65 		     EXTRACT_16BITS(&ipx->srcSkt));
     66 
     67 	(void)printf("%s.%04x: ",
     68 		     ipxaddr_string(EXTRACT_32BITS(ipx->dstNet), ipx->dstNode),
     69 		     EXTRACT_16BITS(&ipx->dstSkt));
     70 
     71 	/* take length from ipx header */
     72 	TCHECK(ipx->length);
     73 	length = EXTRACT_16BITS(&ipx->length);
     74 
     75 	ipx_decode(ipx, (u_char *)ipx + ipxSize, length - ipxSize);
     76 	return;
     77 trunc:
     78 	printf("[|ipx %d]", length);
     79 }
     80 
     81 static const char *
     82 ipxaddr_string(u_int32_t net, const u_char *node)
     83 {
     84     static char line[256];
     85 
     86     snprintf(line, sizeof(line), "%08x.%02x:%02x:%02x:%02x:%02x:%02x",
     87 	    net, node[0], node[1], node[2], node[3], node[4], node[5]);
     88 
     89     return line;
     90 }
     91 
     92 void
     93 ipx_decode(const struct ipxHdr *ipx, const u_char *datap, u_int length)
     94 {
     95     register u_short dstSkt;
     96 
     97     dstSkt = EXTRACT_16BITS(&ipx->dstSkt);
     98     switch (dstSkt) {
     99       case IPX_SKT_NCP:
    100 	(void)printf("ipx-ncp %d", length);
    101 	break;
    102       case IPX_SKT_SAP:
    103 	ipx_sap_print((u_short *)datap, length);
    104 	break;
    105       case IPX_SKT_RIP:
    106 	ipx_rip_print((u_short *)datap, length);
    107 	break;
    108       case IPX_SKT_NETBIOS:
    109 	(void)printf("ipx-netbios %d", length);
    110 #ifdef TCPDUMP_DO_SMB
    111 	ipx_netbios_print(datap, length);
    112 #endif
    113 	break;
    114       case IPX_SKT_DIAGNOSTICS:
    115 	(void)printf("ipx-diags %d", length);
    116 	break;
    117       case IPX_SKT_NWLINK_DGM:
    118 	(void)printf("ipx-nwlink-dgm %d", length);
    119 #ifdef TCPDUMP_DO_SMB
    120 	ipx_netbios_print(datap, length);
    121 #endif
    122 	break;
    123       case IPX_SKT_EIGRP:
    124 	eigrp_print(datap, length);
    125 	break;
    126       default:
    127 	(void)printf("ipx-#%x %d", dstSkt, length);
    128 	break;
    129     }
    130 }
    131 
    132 void
    133 ipx_sap_print(const u_short *ipx, u_int length)
    134 {
    135     int command, i;
    136 
    137     TCHECK(ipx[0]);
    138     command = EXTRACT_16BITS(ipx);
    139     ipx++;
    140     length -= 2;
    141 
    142     switch (command) {
    143       case 1:
    144       case 3:
    145 	if (command == 1)
    146 	    (void)printf("ipx-sap-req");
    147 	else
    148 	    (void)printf("ipx-sap-nearest-req");
    149 
    150 	TCHECK(ipx[0]);
    151 	(void)printf(" %s", ipxsap_string(htons(EXTRACT_16BITS(&ipx[0]))));
    152 	break;
    153 
    154       case 2:
    155       case 4:
    156 	if (command == 2)
    157 	    (void)printf("ipx-sap-resp");
    158 	else
    159 	    (void)printf("ipx-sap-nearest-resp");
    160 
    161 	for (i = 0; i < 8 && length > 0; i++) {
    162 	    TCHECK(ipx[0]);
    163 	    (void)printf(" %s '", ipxsap_string(htons(EXTRACT_16BITS(&ipx[0]))));
    164 	    if (fn_printzp((u_char *)&ipx[1], 48, snapend)) {
    165 		printf("'");
    166 		goto trunc;
    167 	    }
    168 	    TCHECK2(ipx[25], 10);
    169 	    printf("' addr %s",
    170 		ipxaddr_string(EXTRACT_32BITS(&ipx[25]), (u_char *)&ipx[27]));
    171 	    ipx += 32;
    172 	    length -= 64;
    173 	}
    174 	break;
    175       default:
    176 	(void)printf("ipx-sap-?%x", command);
    177 	break;
    178     }
    179     return;
    180 trunc:
    181     printf("[|ipx %d]", length);
    182 }
    183 
    184 void
    185 ipx_rip_print(const u_short *ipx, u_int length)
    186 {
    187     int command, i;
    188 
    189     TCHECK(ipx[0]);
    190     command = EXTRACT_16BITS(ipx);
    191     ipx++;
    192     length -= 2;
    193 
    194     switch (command) {
    195       case 1:
    196 	(void)printf("ipx-rip-req");
    197 	if (length > 0) {
    198 	    TCHECK(ipx[3]);
    199 	    (void)printf(" %08x/%d.%d", EXTRACT_32BITS(&ipx[0]),
    200 			 EXTRACT_16BITS(&ipx[2]), EXTRACT_16BITS(&ipx[3]));
    201 	}
    202 	break;
    203       case 2:
    204 	(void)printf("ipx-rip-resp");
    205 	for (i = 0; i < 50 && length > 0; i++) {
    206 	    TCHECK(ipx[3]);
    207 	    (void)printf(" %08x/%d.%d", EXTRACT_32BITS(&ipx[0]),
    208 			 EXTRACT_16BITS(&ipx[2]), EXTRACT_16BITS(&ipx[3]));
    209 
    210 	    ipx += 4;
    211 	    length -= 8;
    212 	}
    213 	break;
    214       default:
    215 	(void)printf("ipx-rip-?%x", command);
    216 	break;
    217     }
    218     return;
    219 trunc:
    220     printf("[|ipx %d]", length);
    221 }
    222