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 <sys/cdefs.h> 27 #ifndef lint 28 __RCSID("$NetBSD: print-ipx.c,v 1.8 2024/09/02 16:15:31 christos Exp $"); 29 #endif 30 31 #include <config.h> 32 33 #include "netdissect-stdinc.h" 34 35 #include <stdio.h> 36 37 #define ND_LONGJMP_FROM_TCHECK 38 #include "netdissect.h" 39 #include "addrtoname.h" 40 #include "extract.h" 41 42 /* well-known sockets */ 43 #define IPX_SKT_NCP 0x0451 44 #define IPX_SKT_SAP 0x0452 45 #define IPX_SKT_RIP 0x0453 46 #define IPX_SKT_NETBIOS 0x0455 47 #define IPX_SKT_DIAGNOSTICS 0x0456 48 #define IPX_SKT_NWLINK_DGM 0x0553 /* NWLink datagram, may contain SMB */ 49 #define IPX_SKT_EIGRP 0x85be /* Cisco EIGRP over IPX */ 50 51 /* IPX transport header */ 52 struct ipxHdr { 53 nd_uint16_t cksum; /* Checksum */ 54 nd_uint16_t length; /* Length, in bytes, including header */ 55 nd_uint8_t tCtl; /* Transport Control (i.e. hop count) */ 56 nd_uint8_t pType; /* Packet Type (i.e. level 2 protocol) */ 57 nd_uint32_t dstNet; /* destination net */ 58 nd_mac_addr dstNode; /* destination node */ 59 nd_uint16_t dstSkt; /* destination socket */ 60 nd_uint32_t srcNet; /* source net */ 61 nd_mac_addr srcNode; /* source node */ 62 nd_uint16_t srcSkt; /* source socket */ 63 }; 64 65 #define ipxSize 30 66 67 static const char *ipxaddr_string(netdissect_options *, uint32_t, const u_char *); 68 static void ipx_decode(netdissect_options *, const struct ipxHdr *, const u_char *, u_int); 69 static void ipx_sap_print(netdissect_options *, const u_char *, u_int); 70 static void ipx_rip_print(netdissect_options *, const u_char *, u_int); 71 72 /* 73 * Print IPX datagram packets. 74 */ 75 void 76 ipx_print(netdissect_options *ndo, const u_char *p, u_int length) 77 { 78 const struct ipxHdr *ipx = (const struct ipxHdr *)p; 79 80 ndo->ndo_protocol = "ipx"; 81 if (!ndo->ndo_eflag) 82 ND_PRINT("IPX "); 83 84 ND_PRINT("%s.%04x > ", 85 ipxaddr_string(ndo, GET_BE_U_4(ipx->srcNet), ipx->srcNode), 86 GET_BE_U_2(ipx->srcSkt)); 87 88 ND_PRINT("%s.%04x: ", 89 ipxaddr_string(ndo, GET_BE_U_4(ipx->dstNet), ipx->dstNode), 90 GET_BE_U_2(ipx->dstSkt)); 91 92 /* take length from ipx header */ 93 length = GET_BE_U_2(ipx->length); 94 95 if (length < ipxSize) { 96 ND_PRINT("[length %u < %u]", length, ipxSize); 97 nd_print_invalid(ndo); 98 return; 99 } 100 ipx_decode(ndo, ipx, p + ipxSize, length - ipxSize); 101 } 102 103 static const char * 104 ipxaddr_string(netdissect_options *ndo, 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, GET_U_1(node), GET_U_1(node + 1), 110 GET_U_1(node + 2), GET_U_1(node + 3), 111 GET_U_1(node + 4), GET_U_1(node + 5)); 112 113 return line; 114 } 115 116 static void 117 ipx_decode(netdissect_options *ndo, const struct ipxHdr *ipx, const u_char *datap, u_int length) 118 { 119 u_short dstSkt; 120 121 dstSkt = GET_BE_U_2(ipx->dstSkt); 122 switch (dstSkt) { 123 case IPX_SKT_NCP: 124 ND_PRINT("ipx-ncp %u", length); 125 break; 126 case IPX_SKT_SAP: 127 ipx_sap_print(ndo, datap, length); 128 break; 129 case IPX_SKT_RIP: 130 ipx_rip_print(ndo, datap, length); 131 break; 132 case IPX_SKT_NETBIOS: 133 ND_PRINT("ipx-netbios %u", length); 134 #ifdef ENABLE_SMB 135 ipx_netbios_print(ndo, datap, length); 136 #endif 137 break; 138 case IPX_SKT_DIAGNOSTICS: 139 ND_PRINT("ipx-diags %u", length); 140 break; 141 case IPX_SKT_NWLINK_DGM: 142 ND_PRINT("ipx-nwlink-dgm %u", length); 143 #ifdef ENABLE_SMB 144 ipx_netbios_print(ndo, datap, length); 145 #endif 146 break; 147 case IPX_SKT_EIGRP: 148 eigrp_print(ndo, datap, length); 149 break; 150 default: 151 ND_PRINT("ipx-#%x %u", dstSkt, length); 152 break; 153 } 154 } 155 156 static void 157 ipx_sap_print(netdissect_options *ndo, const u_char *ipx, u_int length) 158 { 159 int command, i; 160 161 command = GET_BE_U_2(ipx); 162 ND_ICHECK_U(length, <, 2); 163 ipx += 2; 164 length -= 2; 165 166 switch (command) { 167 case 1: 168 case 3: 169 if (command == 1) 170 ND_PRINT("ipx-sap-req"); 171 else 172 ND_PRINT("ipx-sap-nearest-req"); 173 174 ND_PRINT(" %s", ipxsap_string(ndo, htons(GET_BE_U_2(ipx)))); 175 break; 176 177 case 2: 178 case 4: 179 if (command == 2) 180 ND_PRINT("ipx-sap-resp"); 181 else 182 ND_PRINT("ipx-sap-nearest-resp"); 183 184 for (i = 0; i < 8 && length != 0; i++) { 185 ND_TCHECK_2(ipx); 186 if (length < 2) 187 goto invalid; 188 ND_PRINT(" %s '", ipxsap_string(ndo, htons(GET_BE_U_2(ipx)))); 189 ipx += 2; 190 length -= 2; 191 if (length < 48) { 192 ND_PRINT("'"); 193 goto invalid; 194 } 195 nd_printjnp(ndo, ipx, 48); 196 ND_PRINT("'"); 197 ipx += 48; 198 length -= 48; 199 /* 200 * 10 bytes of IPX address. 201 */ 202 ND_TCHECK_LEN(ipx, 10); 203 if (length < 10) 204 goto invalid; 205 ND_PRINT(" addr %s", 206 ipxaddr_string(ndo, GET_BE_U_4(ipx), ipx + 4)); 207 ipx += 10; 208 length -= 10; 209 /* 210 * 2 bytes of socket and 2 bytes of number of intermediate 211 * networks. 212 */ 213 ND_TCHECK_4(ipx); 214 if (length < 4) 215 goto invalid; 216 ipx += 4; 217 length -= 4; 218 } 219 break; 220 default: 221 ND_PRINT("ipx-sap-?%x", command); 222 break; 223 } 224 return; 225 226 invalid: 227 nd_print_invalid(ndo); 228 } 229 230 static void 231 ipx_rip_print(netdissect_options *ndo, const u_char *ipx, u_int length) 232 { 233 int command, i; 234 235 command = GET_BE_U_2(ipx); 236 ND_ICHECK_U(length, <, 2); 237 ipx += 2; 238 length -= 2; 239 240 switch (command) { 241 case 1: 242 ND_PRINT("ipx-rip-req"); 243 if (length != 0) { 244 if (length < 8) 245 goto invalid; 246 ND_PRINT(" %08x/%u.%u", GET_BE_U_4(ipx), 247 GET_BE_U_2(ipx + 4), GET_BE_U_2(ipx + 6)); 248 } 249 break; 250 case 2: 251 ND_PRINT("ipx-rip-resp"); 252 for (i = 0; i < 50 && length != 0; i++) { 253 if (length < 8) 254 goto invalid; 255 ND_PRINT(" %08x/%u.%u", GET_BE_U_4(ipx), 256 GET_BE_U_2(ipx + 4), GET_BE_U_2(ipx + 6)); 257 258 ipx += 8; 259 length -= 8; 260 } 261 break; 262 default: 263 ND_PRINT("ipx-rip-?%x", command); 264 break; 265 } 266 return; 267 268 invalid: 269 nd_print_invalid(ndo); 270 } 271