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