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 * Contributed by Brad Parker (brad@fcr.com). 22 */ 23 24 /* \summary: Novell IPX printer */ 25 26 #ifdef HAVE_CONFIG_H 27 #include <config.h> 28 #endif 29 30 #include "netdissect-stdinc.h" 31 32 #include <stdio.h> 33 34 #define ND_LONGJMP_FROM_TCHECK 35 #include "netdissect.h" 36 #include "addrtoname.h" 37 #include "extract.h" 38 39 /* well-known sockets */ 40 #define IPX_SKT_NCP 0x0451 41 #define IPX_SKT_SAP 0x0452 42 #define IPX_SKT_RIP 0x0453 43 #define IPX_SKT_NETBIOS 0x0455 44 #define IPX_SKT_DIAGNOSTICS 0x0456 45 #define IPX_SKT_NWLINK_DGM 0x0553 /* NWLink datagram, may contain SMB */ 46 #define IPX_SKT_EIGRP 0x85be /* Cisco EIGRP over IPX */ 47 48 /* IPX transport header */ 49 struct ipxHdr { 50 nd_uint16_t cksum; /* Checksum */ 51 nd_uint16_t length; /* Length, in bytes, including header */ 52 nd_uint8_t tCtl; /* Transport Control (i.e. hop count) */ 53 nd_uint8_t pType; /* Packet Type (i.e. level 2 protocol) */ 54 nd_uint32_t dstNet; /* destination net */ 55 nd_mac_addr dstNode; /* destination node */ 56 nd_uint16_t dstSkt; /* destination socket */ 57 nd_uint32_t srcNet; /* source net */ 58 nd_mac_addr srcNode; /* source node */ 59 nd_uint16_t srcSkt; /* source socket */ 60 }; 61 62 #define ipxSize 30 63 64 static const char *ipxaddr_string(netdissect_options *, uint32_t, const u_char *); 65 static void ipx_decode(netdissect_options *, const struct ipxHdr *, const u_char *, u_int); 66 static void ipx_sap_print(netdissect_options *, const u_char *, u_int); 67 static void ipx_rip_print(netdissect_options *, const u_char *, u_int); 68 69 /* 70 * Print IPX datagram packets. 71 */ 72 void 73 ipx_print(netdissect_options *ndo, const u_char *p, u_int length) 74 { 75 const struct ipxHdr *ipx = (const struct ipxHdr *)p; 76 77 ndo->ndo_protocol = "ipx"; 78 if (!ndo->ndo_eflag) 79 ND_PRINT("IPX "); 80 81 ND_PRINT("%s.%04x > ", 82 ipxaddr_string(ndo, GET_BE_U_4(ipx->srcNet), ipx->srcNode), 83 GET_BE_U_2(ipx->srcSkt)); 84 85 ND_PRINT("%s.%04x: ", 86 ipxaddr_string(ndo, GET_BE_U_4(ipx->dstNet), ipx->dstNode), 87 GET_BE_U_2(ipx->dstSkt)); 88 89 /* take length from ipx header */ 90 length = GET_BE_U_2(ipx->length); 91 92 if (length < ipxSize) { 93 ND_PRINT("[length %u < %u]", length, ipxSize); 94 nd_print_invalid(ndo); 95 return; 96 } 97 ipx_decode(ndo, ipx, p + ipxSize, length - ipxSize); 98 } 99 100 static const char * 101 ipxaddr_string(netdissect_options *ndo, uint32_t net, const u_char *node) 102 { 103 static char line[256]; 104 105 snprintf(line, sizeof(line), "%08x.%02x:%02x:%02x:%02x:%02x:%02x", 106 net, GET_U_1(node), GET_U_1(node + 1), 107 GET_U_1(node + 2), GET_U_1(node + 3), 108 GET_U_1(node + 4), GET_U_1(node + 5)); 109 110 return line; 111 } 112 113 static void 114 ipx_decode(netdissect_options *ndo, const struct ipxHdr *ipx, const u_char *datap, u_int length) 115 { 116 u_short dstSkt; 117 118 dstSkt = GET_BE_U_2(ipx->dstSkt); 119 switch (dstSkt) { 120 case IPX_SKT_NCP: 121 ND_PRINT("ipx-ncp %u", length); 122 break; 123 case IPX_SKT_SAP: 124 ipx_sap_print(ndo, datap, length); 125 break; 126 case IPX_SKT_RIP: 127 ipx_rip_print(ndo, datap, length); 128 break; 129 case IPX_SKT_NETBIOS: 130 ND_PRINT("ipx-netbios %u", length); 131 #ifdef ENABLE_SMB 132 ipx_netbios_print(ndo, datap, length); 133 #endif 134 break; 135 case IPX_SKT_DIAGNOSTICS: 136 ND_PRINT("ipx-diags %u", length); 137 break; 138 case IPX_SKT_NWLINK_DGM: 139 ND_PRINT("ipx-nwlink-dgm %u", length); 140 #ifdef ENABLE_SMB 141 ipx_netbios_print(ndo, datap, length); 142 #endif 143 break; 144 case IPX_SKT_EIGRP: 145 eigrp_print(ndo, datap, length); 146 break; 147 default: 148 ND_PRINT("ipx-#%x %u", dstSkt, length); 149 break; 150 } 151 } 152 153 static void 154 ipx_sap_print(netdissect_options *ndo, const u_char *ipx, u_int length) 155 { 156 int command, i; 157 158 command = GET_BE_U_2(ipx); 159 ipx += 2; 160 length -= 2; 161 162 switch (command) { 163 case 1: 164 case 3: 165 if (command == 1) 166 ND_PRINT("ipx-sap-req"); 167 else 168 ND_PRINT("ipx-sap-nearest-req"); 169 170 ND_PRINT(" %s", ipxsap_string(ndo, htons(GET_BE_U_2(ipx)))); 171 break; 172 173 case 2: 174 case 4: 175 if (command == 2) 176 ND_PRINT("ipx-sap-resp"); 177 else 178 ND_PRINT("ipx-sap-nearest-resp"); 179 180 for (i = 0; i < 8 && length != 0; i++) { 181 ND_TCHECK_2(ipx); 182 if (length < 2) 183 goto invalid; 184 ND_PRINT(" %s '", ipxsap_string(ndo, htons(GET_BE_U_2(ipx)))); 185 ipx += 2; 186 length -= 2; 187 if (length < 48) { 188 ND_PRINT("'"); 189 goto invalid; 190 } 191 nd_printjnp(ndo, ipx, 48); 192 ND_PRINT("'"); 193 ipx += 48; 194 length -= 48; 195 /* 196 * 10 bytes of IPX address. 197 */ 198 ND_TCHECK_LEN(ipx, 10); 199 if (length < 10) 200 goto invalid; 201 ND_PRINT(" addr %s", 202 ipxaddr_string(ndo, GET_BE_U_4(ipx), ipx + 4)); 203 ipx += 10; 204 length -= 10; 205 /* 206 * 2 bytes of socket and 2 bytes of number of intermediate 207 * networks. 208 */ 209 ND_TCHECK_4(ipx); 210 if (length < 4) 211 goto invalid; 212 ipx += 4; 213 length -= 4; 214 } 215 break; 216 default: 217 ND_PRINT("ipx-sap-?%x", command); 218 break; 219 } 220 return; 221 222 invalid: 223 nd_print_invalid(ndo); 224 } 225 226 static void 227 ipx_rip_print(netdissect_options *ndo, const u_char *ipx, u_int length) 228 { 229 int command, i; 230 231 command = GET_BE_U_2(ipx); 232 ipx += 2; 233 length -= 2; 234 235 switch (command) { 236 case 1: 237 ND_PRINT("ipx-rip-req"); 238 if (length != 0) { 239 if (length < 8) 240 goto invalid; 241 ND_PRINT(" %08x/%u.%u", GET_BE_U_4(ipx), 242 GET_BE_U_2(ipx + 4), GET_BE_U_2(ipx + 6)); 243 } 244 break; 245 case 2: 246 ND_PRINT("ipx-rip-resp"); 247 for (i = 0; i < 50 && length != 0; i++) { 248 if (length < 8) 249 goto invalid; 250 ND_PRINT(" %08x/%u.%u", GET_BE_U_4(ipx), 251 GET_BE_U_2(ipx + 4), GET_BE_U_2(ipx + 6)); 252 253 ipx += 8; 254 length -= 8; 255 } 256 break; 257 default: 258 ND_PRINT("ipx-rip-?%x", command); 259 break; 260 } 261 return; 262 263 invalid: 264 nd_print_invalid(ndo); 265 } 266