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 #include <sys/cdefs.h> 26 #ifndef lint 27 __RCSID("$NetBSD: print-ipx.c,v 1.4 2014/11/20 03:05:03 christos Exp $"); 28 #endif 29 30 #define NETDISSECT_REWORKED 31 #ifdef HAVE_CONFIG_H 32 #include "config.h" 33 #endif 34 35 #include <tcpdump-stdinc.h> 36 37 #include <stdio.h> 38 39 #include "interface.h" 40 #include "addrtoname.h" 41 #include "extract.h" 42 43 /* well-known sockets */ 44 #define IPX_SKT_NCP 0x0451 45 #define IPX_SKT_SAP 0x0452 46 #define IPX_SKT_RIP 0x0453 47 #define IPX_SKT_NETBIOS 0x0455 48 #define IPX_SKT_DIAGNOSTICS 0x0456 49 #define IPX_SKT_NWLINK_DGM 0x0553 /* NWLink datagram, may contain SMB */ 50 #define IPX_SKT_EIGRP 0x85be /* Cisco EIGRP over IPX */ 51 52 /* IPX transport header */ 53 struct ipxHdr { 54 uint16_t cksum; /* Checksum */ 55 uint16_t length; /* Length, in bytes, including header */ 56 uint8_t tCtl; /* Transport Control (i.e. hop count) */ 57 uint8_t pType; /* Packet Type (i.e. level 2 protocol) */ 58 uint16_t dstNet[2]; /* destination net */ 59 uint8_t dstNode[6]; /* destination node */ 60 uint16_t dstSkt; /* destination socket */ 61 uint16_t srcNet[2]; /* source net */ 62 uint8_t srcNode[6]; /* source node */ 63 uint16_t srcSkt; /* source socket */ 64 }; 65 66 #define ipxSize 30 67 68 static const char *ipxaddr_string(uint32_t, const u_char *); 69 static void ipx_decode(netdissect_options *, const struct ipxHdr *, const u_char *, u_int); 70 static void ipx_sap_print(netdissect_options *, const u_short *, u_int); 71 static void ipx_rip_print(netdissect_options *, const u_short *, u_int); 72 73 /* 74 * Print IPX datagram packets. 75 */ 76 void 77 ipx_print(netdissect_options *ndo, const u_char *p, u_int length) 78 { 79 const struct ipxHdr *ipx = (const struct ipxHdr *)p; 80 81 if (!ndo->ndo_eflag) 82 ND_PRINT((ndo, "IPX ")); 83 84 ND_TCHECK(ipx->srcSkt); 85 ND_PRINT((ndo, "%s.%04x > ", 86 ipxaddr_string(EXTRACT_32BITS(ipx->srcNet), ipx->srcNode), 87 EXTRACT_16BITS(&ipx->srcSkt))); 88 89 ND_PRINT((ndo, "%s.%04x: ", 90 ipxaddr_string(EXTRACT_32BITS(ipx->dstNet), ipx->dstNode), 91 EXTRACT_16BITS(&ipx->dstSkt))); 92 93 /* take length from ipx header */ 94 ND_TCHECK(ipx->length); 95 length = EXTRACT_16BITS(&ipx->length); 96 97 ipx_decode(ndo, ipx, (u_char *)ipx + ipxSize, length - ipxSize); 98 return; 99 trunc: 100 ND_PRINT((ndo, "[|ipx %d]", length)); 101 } 102 103 static const char * 104 ipxaddr_string(uint32_t net, const u_char *node) 105 { 106 static char line[256]; 107 108 snprintf(line, sizeof(line), "%08x.%02x:%02x:%02x:%02x:%02x:%02x", 109 net, node[0], node[1], node[2], node[3], node[4], node[5]); 110 111 return line; 112 } 113 114 static void 115 ipx_decode(netdissect_options *ndo, const struct ipxHdr *ipx, const u_char *datap, u_int length) 116 { 117 register u_short dstSkt; 118 119 dstSkt = EXTRACT_16BITS(&ipx->dstSkt); 120 switch (dstSkt) { 121 case IPX_SKT_NCP: 122 ND_PRINT((ndo, "ipx-ncp %d", length)); 123 break; 124 case IPX_SKT_SAP: 125 ipx_sap_print(ndo, (u_short *)datap, length); 126 break; 127 case IPX_SKT_RIP: 128 ipx_rip_print(ndo, (u_short *)datap, length); 129 break; 130 case IPX_SKT_NETBIOS: 131 ND_PRINT((ndo, "ipx-netbios %d", length)); 132 #ifdef TCPDUMP_DO_SMB 133 ipx_netbios_print(ndo, datap, length); 134 #endif 135 break; 136 case IPX_SKT_DIAGNOSTICS: 137 ND_PRINT((ndo, "ipx-diags %d", length)); 138 break; 139 case IPX_SKT_NWLINK_DGM: 140 ND_PRINT((ndo, "ipx-nwlink-dgm %d", length)); 141 #ifdef TCPDUMP_DO_SMB 142 ipx_netbios_print(ndo, datap, length); 143 #endif 144 break; 145 case IPX_SKT_EIGRP: 146 eigrp_print(ndo, datap, length); 147 break; 148 default: 149 ND_PRINT((ndo, "ipx-#%x %d", dstSkt, length)); 150 break; 151 } 152 } 153 154 static void 155 ipx_sap_print(netdissect_options *ndo, const u_short *ipx, u_int length) 156 { 157 int command, i; 158 159 ND_TCHECK(ipx[0]); 160 command = EXTRACT_16BITS(ipx); 161 ipx++; 162 length -= 2; 163 164 switch (command) { 165 case 1: 166 case 3: 167 if (command == 1) 168 ND_PRINT((ndo, "ipx-sap-req")); 169 else 170 ND_PRINT((ndo, "ipx-sap-nearest-req")); 171 172 ND_TCHECK(ipx[0]); 173 ND_PRINT((ndo, " %s", ipxsap_string(htons(EXTRACT_16BITS(&ipx[0]))))); 174 break; 175 176 case 2: 177 case 4: 178 if (command == 2) 179 ND_PRINT((ndo, "ipx-sap-resp")); 180 else 181 ND_PRINT((ndo, "ipx-sap-nearest-resp")); 182 183 for (i = 0; i < 8 && length > 0; i++) { 184 ND_TCHECK(ipx[0]); 185 ND_PRINT((ndo, " %s '", ipxsap_string(htons(EXTRACT_16BITS(&ipx[0]))))); 186 if (fn_printzp(ndo, (u_char *)&ipx[1], 48, ndo->ndo_snapend)) { 187 ND_PRINT((ndo, "'")); 188 goto trunc; 189 } 190 ND_TCHECK2(ipx[25], 10); 191 ND_PRINT((ndo, "' addr %s", 192 ipxaddr_string(EXTRACT_32BITS(&ipx[25]), (u_char *)&ipx[27]))); 193 ipx += 32; 194 length -= 64; 195 } 196 break; 197 default: 198 ND_PRINT((ndo, "ipx-sap-?%x", command)); 199 break; 200 } 201 return; 202 trunc: 203 ND_PRINT((ndo, "[|ipx %d]", length)); 204 } 205 206 static void 207 ipx_rip_print(netdissect_options *ndo, const u_short *ipx, u_int length) 208 { 209 int command, i; 210 211 ND_TCHECK(ipx[0]); 212 command = EXTRACT_16BITS(ipx); 213 ipx++; 214 length -= 2; 215 216 switch (command) { 217 case 1: 218 ND_PRINT((ndo, "ipx-rip-req")); 219 if (length > 0) { 220 ND_TCHECK(ipx[3]); 221 ND_PRINT((ndo, " %08x/%d.%d", EXTRACT_32BITS(&ipx[0]), 222 EXTRACT_16BITS(&ipx[2]), EXTRACT_16BITS(&ipx[3]))); 223 } 224 break; 225 case 2: 226 ND_PRINT((ndo, "ipx-rip-resp")); 227 for (i = 0; i < 50 && length > 0; i++) { 228 ND_TCHECK(ipx[3]); 229 ND_PRINT((ndo, " %08x/%d.%d", EXTRACT_32BITS(&ipx[0]), 230 EXTRACT_16BITS(&ipx[2]), EXTRACT_16BITS(&ipx[3]))); 231 232 ipx += 4; 233 length -= 8; 234 } 235 break; 236 default: 237 ND_PRINT((ndo, "ipx-rip-?%x", command)); 238 break; 239 } 240 return; 241 trunc: 242 ND_PRINT((ndo, "[|ipx %d]", length)); 243 } 244