/* * Copyright (c) 1994, 1995, 1996 * The Regents of the University of California. All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that: (1) source code distributions * retain the above copyright notice and this paragraph in its entirety, (2) * distributions including binary code include the above copyright notice and * this paragraph in its entirety in the documentation or other materials * provided with the distribution, and (3) all advertising materials mentioning * features or use of this software display the following acknowledgement: * ``This product includes software developed by the University of California, * Lawrence Berkeley Laboratory and its contributors.'' Neither the name of * the University nor the names of its contributors may be used to endorse * or promote products derived from this software without specific prior * written permission. * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR IMPLIED * WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. * * Contributed by Brad Parker (brad@fcr.com). */ /* \summary: Novell IPX printer */ #ifdef HAVE_CONFIG_H #include #endif #include "netdissect-stdinc.h" #include #define ND_LONGJMP_FROM_TCHECK #include "netdissect.h" #include "addrtoname.h" #include "extract.h" /* well-known sockets */ #define IPX_SKT_NCP 0x0451 #define IPX_SKT_SAP 0x0452 #define IPX_SKT_RIP 0x0453 #define IPX_SKT_NETBIOS 0x0455 #define IPX_SKT_DIAGNOSTICS 0x0456 #define IPX_SKT_NWLINK_DGM 0x0553 /* NWLink datagram, may contain SMB */ #define IPX_SKT_EIGRP 0x85be /* Cisco EIGRP over IPX */ /* IPX transport header */ struct ipxHdr { nd_uint16_t cksum; /* Checksum */ nd_uint16_t length; /* Length, in bytes, including header */ nd_uint8_t tCtl; /* Transport Control (i.e. hop count) */ nd_uint8_t pType; /* Packet Type (i.e. level 2 protocol) */ nd_uint32_t dstNet; /* destination net */ nd_mac_addr dstNode; /* destination node */ nd_uint16_t dstSkt; /* destination socket */ nd_uint32_t srcNet; /* source net */ nd_mac_addr srcNode; /* source node */ nd_uint16_t srcSkt; /* source socket */ }; #define ipxSize 30 static const char *ipxaddr_string(netdissect_options *, uint32_t, const u_char *); static void ipx_decode(netdissect_options *, const struct ipxHdr *, const u_char *, u_int); static void ipx_sap_print(netdissect_options *, const u_char *, u_int); static void ipx_rip_print(netdissect_options *, const u_char *, u_int); /* * Print IPX datagram packets. */ void ipx_print(netdissect_options *ndo, const u_char *p, u_int length) { const struct ipxHdr *ipx = (const struct ipxHdr *)p; ndo->ndo_protocol = "ipx"; if (!ndo->ndo_eflag) ND_PRINT("IPX "); ND_PRINT("%s.%04x > ", ipxaddr_string(ndo, GET_BE_U_4(ipx->srcNet), ipx->srcNode), GET_BE_U_2(ipx->srcSkt)); ND_PRINT("%s.%04x: ", ipxaddr_string(ndo, GET_BE_U_4(ipx->dstNet), ipx->dstNode), GET_BE_U_2(ipx->dstSkt)); /* take length from ipx header */ length = GET_BE_U_2(ipx->length); if (length < ipxSize) { ND_PRINT("[length %u < %u]", length, ipxSize); nd_print_invalid(ndo); return; } ipx_decode(ndo, ipx, p + ipxSize, length - ipxSize); } static const char * ipxaddr_string(netdissect_options *ndo, uint32_t net, const u_char *node) { static char line[256]; snprintf(line, sizeof(line), "%08x.%02x:%02x:%02x:%02x:%02x:%02x", net, GET_U_1(node), GET_U_1(node + 1), GET_U_1(node + 2), GET_U_1(node + 3), GET_U_1(node + 4), GET_U_1(node + 5)); return line; } static void ipx_decode(netdissect_options *ndo, const struct ipxHdr *ipx, const u_char *datap, u_int length) { u_short dstSkt; dstSkt = GET_BE_U_2(ipx->dstSkt); switch (dstSkt) { case IPX_SKT_NCP: ND_PRINT("ipx-ncp %u", length); break; case IPX_SKT_SAP: ipx_sap_print(ndo, datap, length); break; case IPX_SKT_RIP: ipx_rip_print(ndo, datap, length); break; case IPX_SKT_NETBIOS: ND_PRINT("ipx-netbios %u", length); #ifdef ENABLE_SMB ipx_netbios_print(ndo, datap, length); #endif break; case IPX_SKT_DIAGNOSTICS: ND_PRINT("ipx-diags %u", length); break; case IPX_SKT_NWLINK_DGM: ND_PRINT("ipx-nwlink-dgm %u", length); #ifdef ENABLE_SMB ipx_netbios_print(ndo, datap, length); #endif break; case IPX_SKT_EIGRP: eigrp_print(ndo, datap, length); break; default: ND_PRINT("ipx-#%x %u", dstSkt, length); break; } } static void ipx_sap_print(netdissect_options *ndo, const u_char *ipx, u_int length) { int command, i; command = GET_BE_U_2(ipx); ND_ICHECK_U(length, <, 2); ipx += 2; length -= 2; switch (command) { case 1: case 3: if (command == 1) ND_PRINT("ipx-sap-req"); else ND_PRINT("ipx-sap-nearest-req"); ND_PRINT(" %s", ipxsap_string(ndo, htons(GET_BE_U_2(ipx)))); break; case 2: case 4: if (command == 2) ND_PRINT("ipx-sap-resp"); else ND_PRINT("ipx-sap-nearest-resp"); for (i = 0; i < 8 && length != 0; i++) { ND_ICHECK_U(length, <, 2); ND_PRINT(" %s '", ipxsap_string(ndo, htons(GET_BE_U_2(ipx)))); ipx += 2; length -= 2; if (length < 48) { ND_PRINT("'"); goto invalid; } nd_printjnp(ndo, ipx, 48); ND_PRINT("'"); ipx += 48; length -= 48; /* * 10 bytes of IPX address. */ ND_ICHECK_U(length, <, 10); ND_PRINT(" addr %s", ipxaddr_string(ndo, GET_BE_U_4(ipx), ipx + 4)); ipx += 10; length -= 10; /* * 2 bytes of socket and 2 bytes of number of intermediate * networks. */ ND_ICHECK_U(length, <, 4); ND_TCHECK_4(ipx); ipx += 4; length -= 4; } break; default: ND_PRINT("ipx-sap-?%x", command); break; } return; invalid: nd_print_invalid(ndo); } static void ipx_rip_print(netdissect_options *ndo, const u_char *ipx, u_int length) { int command, i; command = GET_BE_U_2(ipx); ND_ICHECK_U(length, <, 2); ipx += 2; length -= 2; switch (command) { case 1: ND_PRINT("ipx-rip-req"); if (length != 0) { ND_ICHECK_U(length, <, 8); ND_PRINT(" %08x/%u.%u", GET_BE_U_4(ipx), GET_BE_U_2(ipx + 4), GET_BE_U_2(ipx + 6)); } break; case 2: ND_PRINT("ipx-rip-resp"); for (i = 0; i < 50 && length != 0; i++) { ND_ICHECK_U(length, <, 8); ND_PRINT(" %08x/%u.%u", GET_BE_U_4(ipx), GET_BE_U_2(ipx + 4), GET_BE_U_2(ipx + 6)); ipx += 8; length -= 8; } break; default: ND_PRINT("ipx-rip-?%x", command); break; } return; invalid: nd_print_invalid(ndo); }