X-Git-Url: https://git.tcpdump.org/tcpdump/blobdiff_plain/684955d58611ee94eccdc34e82b32e676337188c..5ef0bcb5edd748de9d9af13c40da0395dfdd94e8:/print-eigrp.c diff --git a/print-eigrp.c b/print-eigrp.c index 4f941d96..36158231 100644 --- a/print-eigrp.c +++ b/print-eigrp.c @@ -1,5 +1,5 @@ /* - * Copyright (c) 1998-2004 Hannes Gredler + * Copyright (c) 1998-2004 Hannes Gredler * The TCPDUMP project * * Redistribution and use in source and binary forms, with or without @@ -14,38 +14,36 @@ * FOR A PARTICULAR PURPOSE. */ -#ifndef lint -static const char rcsid[] _U_ = - "@(#) $Header: /tcpdump/master/tcpdump/print-eigrp.c,v 1.7 2005-05-06 02:53:26 guy Exp $"; -#endif +/* \summary: Enhanced Interior Gateway Routing Protocol (EIGRP) printer */ + +/* + * specification: + * + * https://web.archive.org/web/20190722221712/https://www.rhyshaden.com/eigrp.htm + * RFC 7868 + */ #ifdef HAVE_CONFIG_H -#include "config.h" +#include #endif -#include +#include "netdissect-stdinc.h" -#include -#include #include -#include "interface.h" +#include "netdissect.h" #include "extract.h" #include "addrtoname.h" -/* - * packet format documented at - * http://www.rhyshaden.com/eigrp.htm - */ struct eigrp_common_header { - u_int8_t version; - u_int8_t opcode; - u_int8_t checksum[2]; - u_int8_t flags[4]; - u_int8_t seq[4]; - u_int8_t ack[4]; - u_int8_t asn[4]; + nd_uint8_t version; + nd_uint8_t opcode; + nd_uint16_t checksum; + nd_uint32_t flags; + nd_uint32_t seq; + nd_uint32_t ack; + nd_uint32_t asn; }; #define EIGRP_VERSION 2 @@ -74,8 +72,8 @@ static const struct tok eigrp_common_header_flag_values[] = { }; struct eigrp_tlv_header { - u_int8_t type[2]; - u_int8_t length[2]; + nd_uint16_t type; + nd_uint16_t length; }; #define EIGRP_TLV_GENERAL_PARM 0x0001 @@ -108,91 +106,91 @@ static const struct tok eigrp_tlv_values[] = { }; struct eigrp_tlv_general_parm_t { - u_int8_t k1; - u_int8_t k2; - u_int8_t k3; - u_int8_t k4; - u_int8_t k5; - u_int8_t res; - u_int8_t holdtime[2]; -}; + nd_uint8_t k1; + nd_uint8_t k2; + nd_uint8_t k3; + nd_uint8_t k4; + nd_uint8_t k5; + nd_uint8_t res; + nd_uint16_t holdtime; +}; struct eigrp_tlv_sw_version_t { - u_int8_t ios_major; - u_int8_t ios_minor; - u_int8_t eigrp_major; - u_int8_t eigrp_minor; -}; + nd_uint8_t ios_major; + nd_uint8_t ios_minor; + nd_uint8_t eigrp_major; + nd_uint8_t eigrp_minor; +}; struct eigrp_tlv_ip_int_t { - u_int8_t nexthop[4]; - u_int8_t delay[4]; - u_int8_t bandwidth[4]; - u_int8_t mtu[3]; - u_int8_t hopcount; - u_int8_t reliability; - u_int8_t load; - u_int8_t reserved[2]; - u_int8_t plen; - u_int8_t destination; /* variable length [1-4] bytes encoding */ -}; + nd_ipv4 nexthop; + nd_uint32_t delay; + nd_uint32_t bandwidth; + nd_uint24_t mtu; + nd_uint8_t hopcount; + nd_uint8_t reliability; + nd_uint8_t load; + nd_byte reserved[2]; + nd_uint8_t plen; + nd_uint8_t destination; /* variable length [1-4] bytes encoding */ +}; struct eigrp_tlv_ip_ext_t { - u_int8_t nexthop[4]; - u_int8_t origin_router[4]; - u_int8_t origin_as[4]; - u_int8_t tag[4]; - u_int8_t metric[4]; - u_int8_t reserved[2]; - u_int8_t proto_id; - u_int8_t flags; - u_int8_t delay[4]; - u_int8_t bandwidth[4]; - u_int8_t mtu[3]; - u_int8_t hopcount; - u_int8_t reliability; - u_int8_t load; - u_int8_t reserved2[2]; - u_int8_t plen; - u_int8_t destination; /* variable length [1-4] bytes encoding */ -}; + nd_ipv4 nexthop; + nd_ipv4 origin_router; + nd_uint32_t origin_as; + nd_uint32_t tag; + nd_uint32_t metric; + nd_byte reserved[2]; + nd_uint8_t proto_id; + nd_uint8_t flags; + nd_uint32_t delay; + nd_uint32_t bandwidth; + nd_uint24_t mtu; + nd_uint8_t hopcount; + nd_uint8_t reliability; + nd_uint8_t load; + nd_byte reserved2[2]; + nd_uint8_t plen; + nd_uint8_t destination; /* variable length [1-4] bytes encoding */ +}; struct eigrp_tlv_at_cable_setup_t { - u_int8_t cable_start[2]; - u_int8_t cable_end[2]; - u_int8_t router_id[4]; + nd_uint16_t cable_start; + nd_uint16_t cable_end; + nd_uint32_t router_id; }; struct eigrp_tlv_at_int_t { - u_int8_t nexthop[4]; - u_int8_t delay[4]; - u_int8_t bandwidth[4]; - u_int8_t mtu[3]; - u_int8_t hopcount; - u_int8_t reliability; - u_int8_t load; - u_int8_t reserved[2]; - u_int8_t cable_start[2]; - u_int8_t cable_end[2]; -}; + nd_byte nexthop[4]; + nd_uint32_t delay; + nd_uint32_t bandwidth; + nd_uint24_t mtu; + nd_uint8_t hopcount; + nd_uint8_t reliability; + nd_uint8_t load; + nd_byte reserved[2]; + nd_uint16_t cable_start; + nd_uint16_t cable_end; +}; struct eigrp_tlv_at_ext_t { - u_int8_t nexthop[4]; - u_int8_t origin_router[4]; - u_int8_t origin_as[4]; - u_int8_t tag[4]; - u_int8_t proto_id; - u_int8_t flags; - u_int8_t metric[2]; - u_int8_t delay[4]; - u_int8_t bandwidth[4]; - u_int8_t mtu[3]; - u_int8_t hopcount; - u_int8_t reliability; - u_int8_t load; - u_int8_t reserved2[2]; - u_int8_t cable_start[2]; - u_int8_t cable_end[2]; + nd_byte nexthop[4]; + nd_uint32_t origin_router; + nd_uint32_t origin_as; + nd_uint32_t tag; + nd_uint8_t proto_id; + nd_uint8_t flags; + nd_uint16_t metric; + nd_uint32_t delay; + nd_uint32_t bandwidth; + nd_uint24_t mtu; + nd_uint8_t hopcount; + nd_uint8_t reliability; + nd_uint8_t load; + nd_byte reserved2[2]; + nd_uint16_t cable_start; + nd_uint16_t cable_end; }; static const struct tok eigrp_ext_proto_id_values[] = { @@ -211,13 +209,13 @@ static const struct tok eigrp_ext_proto_id_values[] = { }; void -eigrp_print(register const u_char *pptr, register u_int len) { - +eigrp_print(netdissect_options *ndo, const u_char *pptr, u_int len) +{ const struct eigrp_common_header *eigrp_com_header; const struct eigrp_tlv_header *eigrp_tlv_header; const u_char *tptr,*tlv_tptr; u_int tlen,eigrp_tlv_len,eigrp_tlv_type,tlv_tlen, byte_length, bit_length; - u_int8_t prefix[4]; + uint8_t prefix[4]; union { const struct eigrp_tlv_general_parm_t *eigrp_tlv_general_parm; @@ -229,225 +227,275 @@ eigrp_print(register const u_char *pptr, register u_int len) { const struct eigrp_tlv_at_ext_t *eigrp_tlv_at_ext; } tlv_ptr; + ndo->ndo_protocol = "eigrp"; tptr=pptr; eigrp_com_header = (const struct eigrp_common_header *)pptr; - TCHECK(*eigrp_com_header); + ND_TCHECK_SIZE(eigrp_com_header); /* * Sanity checking of the header. */ - if (eigrp_com_header->version != EIGRP_VERSION) { - printf("EIGRP version %u packet not supported",eigrp_com_header->version); + if (GET_U_1(eigrp_com_header->version) != EIGRP_VERSION) { + ND_PRINT("EIGRP version %u packet not supported", + GET_U_1(eigrp_com_header->version)); return; } /* in non-verbose mode just lets print the basic Message Type*/ - if (vflag < 1) { - printf("EIGRP %s, length: %u", - tok2str(eigrp_opcode_values, "unknown (%u)",eigrp_com_header->opcode), + if (ndo->ndo_vflag < 1) { + ND_PRINT("EIGRP %s, length: %u", + tok2str(eigrp_opcode_values, "unknown (%u)",GET_U_1(eigrp_com_header->opcode)), len); return; } /* ok they seem to want to know everything - lets fully decode it */ + if (len < sizeof(struct eigrp_common_header)) { + ND_PRINT("EIGRP %s, length: %u (too short, < %u)", + tok2str(eigrp_opcode_values, "unknown (%u)",GET_U_1(eigrp_com_header->opcode)), + len, (u_int) sizeof(struct eigrp_common_header)); + return; + } tlen=len-sizeof(struct eigrp_common_header); /* FIXME print other header info */ - printf("\n\tEIGRP v%u, opcode: %s (%u), chksum: 0x%04x, Flags: [%s]\n\tseq: 0x%08x, ack: 0x%08x, AS: %u, length: %u", - eigrp_com_header->version, - tok2str(eigrp_opcode_values, "unknown, type: %u",eigrp_com_header->opcode), - eigrp_com_header->opcode, - EXTRACT_16BITS(&eigrp_com_header->checksum), + ND_PRINT("\n\tEIGRP v%u, opcode: %s (%u), chksum: 0x%04x, Flags: [%s]\n\tseq: 0x%08x, ack: 0x%08x, AS: %u, length: %u", + GET_U_1(eigrp_com_header->version), + tok2str(eigrp_opcode_values, "unknown, type: %u",GET_U_1(eigrp_com_header->opcode)), + GET_U_1(eigrp_com_header->opcode), + GET_BE_U_2(eigrp_com_header->checksum), tok2str(eigrp_common_header_flag_values, "none", - EXTRACT_32BITS(&eigrp_com_header->flags)), - EXTRACT_32BITS(&eigrp_com_header->seq), - EXTRACT_32BITS(&eigrp_com_header->ack), - EXTRACT_32BITS(&eigrp_com_header->asn), + GET_BE_U_4(eigrp_com_header->flags)), + GET_BE_U_4(eigrp_com_header->seq), + GET_BE_U_4(eigrp_com_header->ack), + GET_BE_U_4(eigrp_com_header->asn), tlen); - tptr+=sizeof(const struct eigrp_common_header); + tptr+=sizeof(struct eigrp_common_header); while(tlen>0) { /* did we capture enough for fully decoding the object header ? */ - TCHECK2(*tptr, sizeof(struct eigrp_tlv_header)); + ND_TCHECK_LEN(tptr, sizeof(struct eigrp_tlv_header)); eigrp_tlv_header = (const struct eigrp_tlv_header *)tptr; - eigrp_tlv_len=EXTRACT_16BITS(&eigrp_tlv_header->length); - eigrp_tlv_type=EXTRACT_16BITS(&eigrp_tlv_header->type); + eigrp_tlv_len=GET_BE_U_2(eigrp_tlv_header->length); + eigrp_tlv_type=GET_BE_U_2(eigrp_tlv_header->type); if (eigrp_tlv_len < sizeof(struct eigrp_tlv_header) || eigrp_tlv_len > tlen) { - print_unknown_data(tptr+sizeof(struct eigrp_tlv_header),"\n\t ",tlen); + print_unknown_data(ndo,tptr+sizeof(struct eigrp_tlv_header),"\n\t ",tlen); return; } - printf("\n\t %s TLV (0x%04x), length: %u", + ND_PRINT("\n\t %s TLV (0x%04x), length: %u", tok2str(eigrp_tlv_values, "Unknown", eigrp_tlv_type), eigrp_tlv_type, eigrp_tlv_len); + if (eigrp_tlv_len < sizeof(struct eigrp_tlv_header)) { + ND_PRINT(" (too short, < %u)", + (u_int) sizeof(struct eigrp_tlv_header)); + break; + } tlv_tptr=tptr+sizeof(struct eigrp_tlv_header); tlv_tlen=eigrp_tlv_len-sizeof(struct eigrp_tlv_header); /* did we capture enough for fully decoding the object ? */ - TCHECK2(*tptr, eigrp_tlv_len); + ND_TCHECK_LEN(tptr, eigrp_tlv_len); switch(eigrp_tlv_type) { case EIGRP_TLV_GENERAL_PARM: tlv_ptr.eigrp_tlv_general_parm = (const struct eigrp_tlv_general_parm_t *)tlv_tptr; + if (tlv_tlen < sizeof(*tlv_ptr.eigrp_tlv_general_parm)) { + ND_PRINT(" (too short, < %u)", + (u_int) (sizeof(struct eigrp_tlv_header) + sizeof(*tlv_ptr.eigrp_tlv_general_parm))); + break; + } - printf("\n\t holdtime: %us, k1 %u, k2 %u, k3 %u, k4 %u, k5 %u", - EXTRACT_16BITS(tlv_ptr.eigrp_tlv_general_parm->holdtime), - tlv_ptr.eigrp_tlv_general_parm->k1, - tlv_ptr.eigrp_tlv_general_parm->k2, - tlv_ptr.eigrp_tlv_general_parm->k3, - tlv_ptr.eigrp_tlv_general_parm->k4, - tlv_ptr.eigrp_tlv_general_parm->k5); + ND_PRINT("\n\t holdtime: %us, k1 %u, k2 %u, k3 %u, k4 %u, k5 %u", + GET_BE_U_2(tlv_ptr.eigrp_tlv_general_parm->holdtime), + GET_U_1(tlv_ptr.eigrp_tlv_general_parm->k1), + GET_U_1(tlv_ptr.eigrp_tlv_general_parm->k2), + GET_U_1(tlv_ptr.eigrp_tlv_general_parm->k3), + GET_U_1(tlv_ptr.eigrp_tlv_general_parm->k4), + GET_U_1(tlv_ptr.eigrp_tlv_general_parm->k5)); break; case EIGRP_TLV_SW_VERSION: tlv_ptr.eigrp_tlv_sw_version = (const struct eigrp_tlv_sw_version_t *)tlv_tptr; + if (tlv_tlen < sizeof(*tlv_ptr.eigrp_tlv_sw_version)) { + ND_PRINT(" (too short, < %u)", + (u_int) (sizeof(struct eigrp_tlv_header) + sizeof(*tlv_ptr.eigrp_tlv_sw_version))); + break; + } - printf("\n\t IOS version: %u.%u, EIGRP version %u.%u", - tlv_ptr.eigrp_tlv_sw_version->ios_major, - tlv_ptr.eigrp_tlv_sw_version->ios_minor, - tlv_ptr.eigrp_tlv_sw_version->eigrp_major, - tlv_ptr.eigrp_tlv_sw_version->eigrp_minor); + ND_PRINT("\n\t IOS version: %u.%u, EIGRP version %u.%u", + GET_U_1(tlv_ptr.eigrp_tlv_sw_version->ios_major), + GET_U_1(tlv_ptr.eigrp_tlv_sw_version->ios_minor), + GET_U_1(tlv_ptr.eigrp_tlv_sw_version->eigrp_major), + GET_U_1(tlv_ptr.eigrp_tlv_sw_version->eigrp_minor)); break; case EIGRP_TLV_IP_INT: tlv_ptr.eigrp_tlv_ip_int = (const struct eigrp_tlv_ip_int_t *)tlv_tptr; + if (tlv_tlen < sizeof(*tlv_ptr.eigrp_tlv_ip_int)) { + ND_PRINT(" (too short, < %u)", + (u_int) (sizeof(struct eigrp_tlv_header) + sizeof(*tlv_ptr.eigrp_tlv_ip_int))); + break; + } - bit_length = tlv_ptr.eigrp_tlv_ip_int->plen; + bit_length = GET_U_1(tlv_ptr.eigrp_tlv_ip_int->plen); if (bit_length > 32) { - printf("\n\t illegal prefix length %u",bit_length); + ND_PRINT("\n\t illegal prefix length %u",bit_length); break; } byte_length = (bit_length + 7) / 8; /* variable length encoding */ memset(prefix, 0, 4); - memcpy(prefix,&tlv_ptr.eigrp_tlv_ip_int->destination,byte_length); + GET_CPY_BYTES(prefix, tlv_ptr.eigrp_tlv_ip_int->destination, byte_length); - printf("\n\t IPv4 prefix: %15s/%u, nexthop: ", - ipaddr_string(prefix), + ND_PRINT("\n\t IPv4 prefix: %15s/%u, nexthop: ", + ipaddr_string(ndo, prefix), /* local buffer, not packet data; don't use GET_IPADDR_STRING() */ bit_length); - if (EXTRACT_32BITS(&tlv_ptr.eigrp_tlv_ip_int->nexthop) == 0) - printf("self"); + if (GET_BE_U_4(tlv_ptr.eigrp_tlv_ip_int->nexthop) == 0) + ND_PRINT("self"); else - printf("%s",ipaddr_string(&tlv_ptr.eigrp_tlv_ip_int->nexthop)); - - printf("\n\t delay %u ms, bandwidth %u Kbps, mtu %u, hop %u, reliability %u, load %u", - (EXTRACT_32BITS(&tlv_ptr.eigrp_tlv_ip_int->delay)/100), - EXTRACT_32BITS(&tlv_ptr.eigrp_tlv_ip_int->bandwidth), - EXTRACT_24BITS(&tlv_ptr.eigrp_tlv_ip_int->mtu), - tlv_ptr.eigrp_tlv_ip_int->hopcount, - tlv_ptr.eigrp_tlv_ip_int->reliability, - tlv_ptr.eigrp_tlv_ip_int->load); + ND_PRINT("%s", + GET_IPADDR_STRING(tlv_ptr.eigrp_tlv_ip_int->nexthop)); + + ND_PRINT("\n\t delay %u ms, bandwidth %u Kbps, mtu %u, hop %u, reliability %u, load %u", + (GET_BE_U_4(tlv_ptr.eigrp_tlv_ip_int->delay)/100), + GET_BE_U_4(tlv_ptr.eigrp_tlv_ip_int->bandwidth), + GET_BE_U_3(tlv_ptr.eigrp_tlv_ip_int->mtu), + GET_U_1(tlv_ptr.eigrp_tlv_ip_int->hopcount), + GET_U_1(tlv_ptr.eigrp_tlv_ip_int->reliability), + GET_U_1(tlv_ptr.eigrp_tlv_ip_int->load)); break; case EIGRP_TLV_IP_EXT: tlv_ptr.eigrp_tlv_ip_ext = (const struct eigrp_tlv_ip_ext_t *)tlv_tptr; + if (tlv_tlen < sizeof(*tlv_ptr.eigrp_tlv_ip_ext)) { + ND_PRINT(" (too short, < %u)", + (u_int) (sizeof(struct eigrp_tlv_header) + sizeof(*tlv_ptr.eigrp_tlv_ip_ext))); + break; + } - bit_length = tlv_ptr.eigrp_tlv_ip_ext->plen; + bit_length = GET_U_1(tlv_ptr.eigrp_tlv_ip_ext->plen); if (bit_length > 32) { - printf("\n\t illegal prefix length %u",bit_length); + ND_PRINT("\n\t illegal prefix length %u",bit_length); break; } byte_length = (bit_length + 7) / 8; /* variable length encoding */ memset(prefix, 0, 4); - memcpy(prefix,&tlv_ptr.eigrp_tlv_ip_ext->destination,byte_length); + GET_CPY_BYTES(prefix, tlv_ptr.eigrp_tlv_ip_ext->destination, byte_length); - printf("\n\t IPv4 prefix: %15s/%u, nexthop: ", - ipaddr_string(prefix), + ND_PRINT("\n\t IPv4 prefix: %15s/%u, nexthop: ", + ipaddr_string(ndo, prefix), /* local buffer, not packet data; don't use GET_IPADDR_STRING() */ bit_length); - if (EXTRACT_32BITS(&tlv_ptr.eigrp_tlv_ip_ext->nexthop) == 0) - printf("self"); + if (GET_BE_U_4(tlv_ptr.eigrp_tlv_ip_ext->nexthop) == 0) + ND_PRINT("self"); else - printf("%s",ipaddr_string(&tlv_ptr.eigrp_tlv_ip_ext->nexthop)); - - printf("\n\t origin-router %s, origin-as %u, origin-proto %s, flags [0x%02x], tag 0x%08x, metric %u", - ipaddr_string(tlv_ptr.eigrp_tlv_ip_ext->origin_router), - EXTRACT_32BITS(tlv_ptr.eigrp_tlv_ip_ext->origin_as), - tok2str(eigrp_ext_proto_id_values,"unknown",tlv_ptr.eigrp_tlv_ip_ext->proto_id), - tlv_ptr.eigrp_tlv_ip_ext->flags, - EXTRACT_32BITS(tlv_ptr.eigrp_tlv_ip_ext->tag), - EXTRACT_32BITS(tlv_ptr.eigrp_tlv_ip_ext->metric)); - - printf("\n\t delay %u ms, bandwidth %u Kbps, mtu %u, hop %u, reliability %u, load %u", - (EXTRACT_32BITS(&tlv_ptr.eigrp_tlv_ip_ext->delay)/100), - EXTRACT_32BITS(&tlv_ptr.eigrp_tlv_ip_ext->bandwidth), - EXTRACT_24BITS(&tlv_ptr.eigrp_tlv_ip_ext->mtu), - tlv_ptr.eigrp_tlv_ip_ext->hopcount, - tlv_ptr.eigrp_tlv_ip_ext->reliability, - tlv_ptr.eigrp_tlv_ip_ext->load); + ND_PRINT("%s", + GET_IPADDR_STRING(tlv_ptr.eigrp_tlv_ip_ext->nexthop)); + + ND_PRINT("\n\t origin-router %s, origin-as %u, origin-proto %s, flags [0x%02x], tag 0x%08x, metric %u", + GET_IPADDR_STRING(tlv_ptr.eigrp_tlv_ip_ext->origin_router), + GET_BE_U_4(tlv_ptr.eigrp_tlv_ip_ext->origin_as), + tok2str(eigrp_ext_proto_id_values,"unknown",GET_U_1(tlv_ptr.eigrp_tlv_ip_ext->proto_id)), + GET_U_1(tlv_ptr.eigrp_tlv_ip_ext->flags), + GET_BE_U_4(tlv_ptr.eigrp_tlv_ip_ext->tag), + GET_BE_U_4(tlv_ptr.eigrp_tlv_ip_ext->metric)); + + ND_PRINT("\n\t delay %u ms, bandwidth %u Kbps, mtu %u, hop %u, reliability %u, load %u", + (GET_BE_U_4(tlv_ptr.eigrp_tlv_ip_ext->delay)/100), + GET_BE_U_4(tlv_ptr.eigrp_tlv_ip_ext->bandwidth), + GET_BE_U_3(tlv_ptr.eigrp_tlv_ip_ext->mtu), + GET_U_1(tlv_ptr.eigrp_tlv_ip_ext->hopcount), + GET_U_1(tlv_ptr.eigrp_tlv_ip_ext->reliability), + GET_U_1(tlv_ptr.eigrp_tlv_ip_ext->load)); break; case EIGRP_TLV_AT_CABLE_SETUP: tlv_ptr.eigrp_tlv_at_cable_setup = (const struct eigrp_tlv_at_cable_setup_t *)tlv_tptr; + if (tlv_tlen < sizeof(*tlv_ptr.eigrp_tlv_at_cable_setup)) { + ND_PRINT(" (too short, < %u)", + (u_int) (sizeof(struct eigrp_tlv_header) + sizeof(*tlv_ptr.eigrp_tlv_at_cable_setup))); + break; + } - printf("\n\t Cable-range: %u-%u, Router-ID %u", - EXTRACT_16BITS(&tlv_ptr.eigrp_tlv_at_cable_setup->cable_start), - EXTRACT_16BITS(&tlv_ptr.eigrp_tlv_at_cable_setup->cable_end), - EXTRACT_32BITS(&tlv_ptr.eigrp_tlv_at_cable_setup->router_id)); + ND_PRINT("\n\t Cable-range: %u-%u, Router-ID %u", + GET_BE_U_2(tlv_ptr.eigrp_tlv_at_cable_setup->cable_start), + GET_BE_U_2(tlv_ptr.eigrp_tlv_at_cable_setup->cable_end), + GET_BE_U_4(tlv_ptr.eigrp_tlv_at_cable_setup->router_id)); break; case EIGRP_TLV_AT_INT: tlv_ptr.eigrp_tlv_at_int = (const struct eigrp_tlv_at_int_t *)tlv_tptr; + if (tlv_tlen < sizeof(*tlv_ptr.eigrp_tlv_at_int)) { + ND_PRINT(" (too short, < %u)", + (u_int) (sizeof(struct eigrp_tlv_header) + sizeof(*tlv_ptr.eigrp_tlv_at_int))); + break; + } - printf("\n\t Cable-Range: %u-%u, nexthop: ", - EXTRACT_16BITS(&tlv_ptr.eigrp_tlv_at_int->cable_start), - EXTRACT_16BITS(&tlv_ptr.eigrp_tlv_at_int->cable_end)); + ND_PRINT("\n\t Cable-Range: %u-%u, nexthop: ", + GET_BE_U_2(tlv_ptr.eigrp_tlv_at_int->cable_start), + GET_BE_U_2(tlv_ptr.eigrp_tlv_at_int->cable_end)); - if (EXTRACT_32BITS(&tlv_ptr.eigrp_tlv_at_int->nexthop) == 0) - printf("self"); + if (GET_BE_U_4(tlv_ptr.eigrp_tlv_at_int->nexthop) == 0) + ND_PRINT("self"); else - printf("%u.%u", - EXTRACT_16BITS(&tlv_ptr.eigrp_tlv_at_int->nexthop), - EXTRACT_16BITS(&tlv_ptr.eigrp_tlv_at_int->nexthop[2])); - - printf("\n\t delay %u ms, bandwidth %u Kbps, mtu %u, hop %u, reliability %u, load %u", - (EXTRACT_32BITS(&tlv_ptr.eigrp_tlv_at_int->delay)/100), - EXTRACT_32BITS(&tlv_ptr.eigrp_tlv_at_int->bandwidth), - EXTRACT_24BITS(&tlv_ptr.eigrp_tlv_at_int->mtu), - tlv_ptr.eigrp_tlv_at_int->hopcount, - tlv_ptr.eigrp_tlv_at_int->reliability, - tlv_ptr.eigrp_tlv_at_int->load); + ND_PRINT("%u.%u", + GET_BE_U_2(&tlv_ptr.eigrp_tlv_at_int->nexthop[0]), + GET_BE_U_2(&tlv_ptr.eigrp_tlv_at_int->nexthop[2])); + + ND_PRINT("\n\t delay %u ms, bandwidth %u Kbps, mtu %u, hop %u, reliability %u, load %u", + (GET_BE_U_4(tlv_ptr.eigrp_tlv_at_int->delay)/100), + GET_BE_U_4(tlv_ptr.eigrp_tlv_at_int->bandwidth), + GET_BE_U_3(tlv_ptr.eigrp_tlv_at_int->mtu), + GET_U_1(tlv_ptr.eigrp_tlv_at_int->hopcount), + GET_U_1(tlv_ptr.eigrp_tlv_at_int->reliability), + GET_U_1(tlv_ptr.eigrp_tlv_at_int->load)); break; case EIGRP_TLV_AT_EXT: tlv_ptr.eigrp_tlv_at_ext = (const struct eigrp_tlv_at_ext_t *)tlv_tptr; + if (tlv_tlen < sizeof(*tlv_ptr.eigrp_tlv_at_ext)) { + ND_PRINT(" (too short, < %u)", + (u_int) (sizeof(struct eigrp_tlv_header) + sizeof(*tlv_ptr.eigrp_tlv_at_ext))); + break; + } - printf("\n\t Cable-Range: %u-%u, nexthop: ", - EXTRACT_16BITS(&tlv_ptr.eigrp_tlv_at_ext->cable_start), - EXTRACT_16BITS(&tlv_ptr.eigrp_tlv_at_ext->cable_end)); + ND_PRINT("\n\t Cable-Range: %u-%u, nexthop: ", + GET_BE_U_2(tlv_ptr.eigrp_tlv_at_ext->cable_start), + GET_BE_U_2(tlv_ptr.eigrp_tlv_at_ext->cable_end)); - if (EXTRACT_32BITS(&tlv_ptr.eigrp_tlv_at_ext->nexthop) == 0) - printf("self"); + if (GET_BE_U_4(tlv_ptr.eigrp_tlv_at_ext->nexthop) == 0) + ND_PRINT("self"); else - printf("%u.%u", - EXTRACT_16BITS(&tlv_ptr.eigrp_tlv_at_ext->nexthop), - EXTRACT_16BITS(&tlv_ptr.eigrp_tlv_at_ext->nexthop[2])); - - printf("\n\t origin-router %u, origin-as %u, origin-proto %s, flags [0x%02x], tag 0x%08x, metric %u", - EXTRACT_32BITS(tlv_ptr.eigrp_tlv_at_ext->origin_router), - EXTRACT_32BITS(tlv_ptr.eigrp_tlv_at_ext->origin_as), - tok2str(eigrp_ext_proto_id_values,"unknown",tlv_ptr.eigrp_tlv_at_ext->proto_id), - tlv_ptr.eigrp_tlv_at_ext->flags, - EXTRACT_32BITS(tlv_ptr.eigrp_tlv_at_ext->tag), - EXTRACT_16BITS(tlv_ptr.eigrp_tlv_at_ext->metric)); - - printf("\n\t delay %u ms, bandwidth %u Kbps, mtu %u, hop %u, reliability %u, load %u", - (EXTRACT_32BITS(&tlv_ptr.eigrp_tlv_at_ext->delay)/100), - EXTRACT_32BITS(&tlv_ptr.eigrp_tlv_at_ext->bandwidth), - EXTRACT_24BITS(&tlv_ptr.eigrp_tlv_at_ext->mtu), - tlv_ptr.eigrp_tlv_at_ext->hopcount, - tlv_ptr.eigrp_tlv_at_ext->reliability, - tlv_ptr.eigrp_tlv_at_ext->load); + ND_PRINT("%u.%u", + GET_BE_U_2(&tlv_ptr.eigrp_tlv_at_ext->nexthop[0]), + GET_BE_U_2(&tlv_ptr.eigrp_tlv_at_ext->nexthop[2])); + + ND_PRINT("\n\t origin-router %u, origin-as %u, origin-proto %s, flags [0x%02x], tag 0x%08x, metric %u", + GET_BE_U_4(tlv_ptr.eigrp_tlv_at_ext->origin_router), + GET_BE_U_4(tlv_ptr.eigrp_tlv_at_ext->origin_as), + tok2str(eigrp_ext_proto_id_values,"unknown",GET_U_1(tlv_ptr.eigrp_tlv_at_ext->proto_id)), + GET_U_1(tlv_ptr.eigrp_tlv_at_ext->flags), + GET_BE_U_4(tlv_ptr.eigrp_tlv_at_ext->tag), + GET_BE_U_2(tlv_ptr.eigrp_tlv_at_ext->metric)); + + ND_PRINT("\n\t delay %u ms, bandwidth %u Kbps, mtu %u, hop %u, reliability %u, load %u", + (GET_BE_U_4(tlv_ptr.eigrp_tlv_at_ext->delay)/100), + GET_BE_U_4(tlv_ptr.eigrp_tlv_at_ext->bandwidth), + GET_BE_U_3(tlv_ptr.eigrp_tlv_at_ext->mtu), + GET_U_1(tlv_ptr.eigrp_tlv_at_ext->hopcount), + GET_U_1(tlv_ptr.eigrp_tlv_at_ext->reliability), + GET_U_1(tlv_ptr.eigrp_tlv_at_ext->load)); break; /* @@ -462,13 +510,13 @@ eigrp_print(register const u_char *pptr, register u_int len) { case EIGRP_TLV_IPX_EXT: default: - if (vflag <= 1) - print_unknown_data(tlv_tptr,"\n\t ",tlv_tlen); + if (ndo->ndo_vflag <= 1) + print_unknown_data(ndo,tlv_tptr,"\n\t ",tlv_tlen); break; } /* do we want to see an additionally hexdump ? */ - if (vflag > 1) - print_unknown_data(tptr+sizeof(struct eigrp_tlv_header),"\n\t ", + if (ndo->ndo_vflag > 1) + print_unknown_data(ndo,tptr+sizeof(struct eigrp_tlv_header),"\n\t ", eigrp_tlv_len-sizeof(struct eigrp_tlv_header)); tptr+=eigrp_tlv_len; @@ -476,5 +524,5 @@ eigrp_print(register const u_char *pptr, register u_int len) { } return; trunc: - printf("\n\t\t packet exceeded snapshot"); + nd_print_trunc(ndo); }