X-Git-Url: https://git.tcpdump.org/tcpdump/blobdiff_plain/1829bc0edbe143a3d616d7ac91c2b3452a44db8d..refs/pull/433/head:/print-eigrp.c diff --git a/print-eigrp.c b/print-eigrp.c index bd8db3a6..a3feb8ef 100644 --- a/print-eigrp.c +++ b/print-eigrp.c @@ -14,19 +14,13 @@ * FOR A PARTICULAR PURPOSE. */ -#ifndef lint -static const char rcsid[] _U_ = - "@(#) $Header: /tcpdump/master/tcpdump/print-eigrp.c,v 1.2 2004-04-30 23:52:00 hannes Exp $"; -#endif - +#define NETDISSECT_REWORKED #ifdef HAVE_CONFIG_H #include "config.h" #endif #include -#include -#include #include #include "interface.h" @@ -39,13 +33,13 @@ static const char rcsid[] _U_ = */ 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]; + uint8_t version; + uint8_t opcode; + uint8_t checksum[2]; + uint8_t flags[4]; + uint8_t seq[4]; + uint8_t ack[4]; + uint8_t asn[4]; }; #define EIGRP_VERSION 2 @@ -67,9 +61,15 @@ static const struct tok eigrp_opcode_values[] = { { 0, NULL} }; +static const struct tok eigrp_common_header_flag_values[] = { + { 0x01, "Init" }, + { 0x02, "Conditionally Received" }, + { 0, NULL} +}; + struct eigrp_tlv_header { - u_int8_t type[2]; - u_int8_t length[2]; + uint8_t type[2]; + uint8_t length[2]; }; #define EIGRP_TLV_GENERAL_PARM 0x0001 @@ -101,53 +101,145 @@ static const struct tok eigrp_tlv_values[] = { { 0, NULL} }; -struct eigrp_tlv_general_parm { - 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]; -}; - -struct eigrp_tlv_sw_version { - u_int8_t ios_major; - u_int8_t ios_minor; - u_int8_t eigrp_major; - u_int8_t eigrp_minor; -}; +struct eigrp_tlv_general_parm_t { + uint8_t k1; + uint8_t k2; + uint8_t k3; + uint8_t k4; + uint8_t k5; + uint8_t res; + uint8_t holdtime[2]; +}; + +struct eigrp_tlv_sw_version_t { + uint8_t ios_major; + uint8_t ios_minor; + uint8_t eigrp_major; + uint8_t eigrp_minor; +}; + +struct eigrp_tlv_ip_int_t { + uint8_t nexthop[4]; + uint8_t delay[4]; + uint8_t bandwidth[4]; + uint8_t mtu[3]; + uint8_t hopcount; + uint8_t reliability; + uint8_t load; + uint8_t reserved[2]; + uint8_t plen; + uint8_t destination; /* variable length [1-4] bytes encoding */ +}; + +struct eigrp_tlv_ip_ext_t { + uint8_t nexthop[4]; + uint8_t origin_router[4]; + uint8_t origin_as[4]; + uint8_t tag[4]; + uint8_t metric[4]; + uint8_t reserved[2]; + uint8_t proto_id; + uint8_t flags; + uint8_t delay[4]; + uint8_t bandwidth[4]; + uint8_t mtu[3]; + uint8_t hopcount; + uint8_t reliability; + uint8_t load; + uint8_t reserved2[2]; + uint8_t plen; + uint8_t destination; /* variable length [1-4] bytes encoding */ +}; + +struct eigrp_tlv_at_cable_setup_t { + uint8_t cable_start[2]; + uint8_t cable_end[2]; + uint8_t router_id[4]; +}; + +struct eigrp_tlv_at_int_t { + uint8_t nexthop[4]; + uint8_t delay[4]; + uint8_t bandwidth[4]; + uint8_t mtu[3]; + uint8_t hopcount; + uint8_t reliability; + uint8_t load; + uint8_t reserved[2]; + uint8_t cable_start[2]; + uint8_t cable_end[2]; +}; + +struct eigrp_tlv_at_ext_t { + uint8_t nexthop[4]; + uint8_t origin_router[4]; + uint8_t origin_as[4]; + uint8_t tag[4]; + uint8_t proto_id; + uint8_t flags; + uint8_t metric[2]; + uint8_t delay[4]; + uint8_t bandwidth[4]; + uint8_t mtu[3]; + uint8_t hopcount; + uint8_t reliability; + uint8_t load; + uint8_t reserved2[2]; + uint8_t cable_start[2]; + uint8_t cable_end[2]; +}; + +static const struct tok eigrp_ext_proto_id_values[] = { + { 0x01, "IGRP" }, + { 0x02, "EIGRP" }, + { 0x03, "Static" }, + { 0x04, "RIP" }, + { 0x05, "Hello" }, + { 0x06, "OSPF" }, + { 0x07, "IS-IS" }, + { 0x08, "EGP" }, + { 0x09, "BGP" }, + { 0x0a, "IDRP" }, + { 0x0b, "Connected" }, + { 0, NULL} +}; void -eigrp_print(register const u_char *pptr, register u_int len) { +eigrp_print(netdissect_options *ndo, register const u_char *pptr, register 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; - int tlen,eigrp_tlv_len,eigrp_tlv_type,tlv_tlen; + u_int tlen,eigrp_tlv_len,eigrp_tlv_type,tlv_tlen, byte_length, bit_length; + uint8_t prefix[4]; union { - const struct eigrp_tlv_general_parm *eigrp_tlv_general_parm; - const struct eigrp_tlv_sw_version *eigrp_tlv_sw_version; + const struct eigrp_tlv_general_parm_t *eigrp_tlv_general_parm; + const struct eigrp_tlv_sw_version_t *eigrp_tlv_sw_version; + const struct eigrp_tlv_ip_int_t *eigrp_tlv_ip_int; + const struct eigrp_tlv_ip_ext_t *eigrp_tlv_ip_ext; + const struct eigrp_tlv_at_cable_setup_t *eigrp_tlv_at_cable_setup; + const struct eigrp_tlv_at_int_t *eigrp_tlv_at_int; + const struct eigrp_tlv_at_ext_t *eigrp_tlv_at_ext; } tlv_ptr; tptr=pptr; eigrp_com_header = (const struct eigrp_common_header *)pptr; - TCHECK(*eigrp_com_header); + ND_TCHECK(*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); + ND_PRINT((ndo, "EIGRP version %u packet not supported",eigrp_com_header->version)); return; } /* in non-verbose mode just lets print the basic Message Type*/ - if (vflag < 1) { - printf("EIGRP %s, length: %u", + if (ndo->ndo_vflag < 1) { + ND_PRINT((ndo, "EIGRP %s, length: %u", tok2str(eigrp_opcode_values, "unknown (%u)",eigrp_com_header->opcode), - len); + len)); return; } @@ -156,68 +248,200 @@ eigrp_print(register const u_char *pptr, register u_int len) { tlen=len-sizeof(struct eigrp_common_header); /* FIXME print other header info */ - printf("\n\tEIGRP v%u, opcode: %s (%u), chksum: 0x%04x, Flags: [0x%08x]\n\tseq: 0x%08x, ack: 0x%08x, AS: %u, length: %u", + ND_PRINT((ndo, "\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), - EXTRACT_32BITS(&eigrp_com_header->flags), + 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), - tlen); + tlen)); tptr+=sizeof(const struct eigrp_common_header); while(tlen>0) { /* did we capture enough for fully decoding the object header ? */ - if (!TTEST2(*tptr, sizeof(struct eigrp_tlv_header))) - goto trunc; + ND_TCHECK2(*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); - if (eigrp_tlv_len == 0 || eigrp_tlv_len > tlen) { - print_unknown_data(tptr+sizeof(sizeof(struct eigrp_tlv_header)),"\n\t ",tlen); + if (eigrp_tlv_len < sizeof(struct eigrp_tlv_header) || + eigrp_tlv_len > 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((ndo, "\n\t %s TLV (0x%04x), length: %u", tok2str(eigrp_tlv_values, "Unknown", eigrp_tlv_type), eigrp_tlv_type, - eigrp_tlv_len); + eigrp_tlv_len)); 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 ? */ - if (!TTEST2(*tptr, eigrp_tlv_len)) - goto trunc; + ND_TCHECK2(*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 *)tlv_tptr; - printf("\n\t holdtime: %us, k1 %u, k2 %u, k3 %u, k4 %u, k5 %u", + tlv_ptr.eigrp_tlv_general_parm = (const struct eigrp_tlv_general_parm_t *)tlv_tptr; + + ND_PRINT((ndo, "\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); + 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 *)tlv_tptr; - printf("\n\t IOS version: %u.%u, EIGRP version %u.%u", + tlv_ptr.eigrp_tlv_sw_version = (const struct eigrp_tlv_sw_version_t *)tlv_tptr; + + ND_PRINT((ndo, "\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); + 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; + + bit_length = tlv_ptr.eigrp_tlv_ip_int->plen; + if (bit_length > 32) { + ND_PRINT((ndo, "\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); + + ND_PRINT((ndo, "\n\t IPv4 prefix: %15s/%u, nexthop: ", + ipaddr_string(ndo, prefix), + bit_length)); + if (EXTRACT_32BITS(&tlv_ptr.eigrp_tlv_ip_int->nexthop) == 0) + ND_PRINT((ndo, "self")); + else + ND_PRINT((ndo, "%s",ipaddr_string(ndo, &tlv_ptr.eigrp_tlv_ip_int->nexthop))); + + ND_PRINT((ndo, "\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)); + break; + + case EIGRP_TLV_IP_EXT: + tlv_ptr.eigrp_tlv_ip_ext = (const struct eigrp_tlv_ip_ext_t *)tlv_tptr; + + bit_length = tlv_ptr.eigrp_tlv_ip_ext->plen; + if (bit_length > 32) { + ND_PRINT((ndo, "\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); + + ND_PRINT((ndo, "\n\t IPv4 prefix: %15s/%u, nexthop: ", + ipaddr_string(ndo, prefix), + bit_length)); + if (EXTRACT_32BITS(&tlv_ptr.eigrp_tlv_ip_ext->nexthop) == 0) + ND_PRINT((ndo, "self")); + else + ND_PRINT((ndo, "%s",ipaddr_string(ndo, &tlv_ptr.eigrp_tlv_ip_ext->nexthop))); + + ND_PRINT((ndo, "\n\t origin-router %s, origin-as %u, origin-proto %s, flags [0x%02x], tag 0x%08x, metric %u", + ipaddr_string(ndo, 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))); + + ND_PRINT((ndo, "\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)); + break; + + case EIGRP_TLV_AT_CABLE_SETUP: + tlv_ptr.eigrp_tlv_at_cable_setup = (const struct eigrp_tlv_at_cable_setup_t *)tlv_tptr; + + ND_PRINT((ndo, "\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))); + break; + + case EIGRP_TLV_AT_INT: + tlv_ptr.eigrp_tlv_at_int = (const struct eigrp_tlv_at_int_t *)tlv_tptr; + + ND_PRINT((ndo, "\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))); + + if (EXTRACT_32BITS(&tlv_ptr.eigrp_tlv_at_int->nexthop) == 0) + ND_PRINT((ndo, "self")); + else + ND_PRINT((ndo, "%u.%u", + EXTRACT_16BITS(&tlv_ptr.eigrp_tlv_at_int->nexthop), + EXTRACT_16BITS(&tlv_ptr.eigrp_tlv_at_int->nexthop[2]))); + + ND_PRINT((ndo, "\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)); + break; + + case EIGRP_TLV_AT_EXT: + tlv_ptr.eigrp_tlv_at_ext = (const struct eigrp_tlv_at_ext_t *)tlv_tptr; + + ND_PRINT((ndo, "\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))); + + if (EXTRACT_32BITS(&tlv_ptr.eigrp_tlv_at_ext->nexthop) == 0) + ND_PRINT((ndo, "self")); + else + ND_PRINT((ndo, "%u.%u", + EXTRACT_16BITS(&tlv_ptr.eigrp_tlv_at_ext->nexthop), + EXTRACT_16BITS(&tlv_ptr.eigrp_tlv_at_ext->nexthop[2]))); + + ND_PRINT((ndo, "\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))); + + ND_PRINT((ndo, "\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)); break; /* @@ -228,22 +452,17 @@ eigrp_print(register const u_char *pptr, register u_int len) { case EIGRP_TLV_AUTH: case EIGRP_TLV_SEQ: case EIGRP_TLV_MCAST_SEQ: - case EIGRP_TLV_IP_INT: - case EIGRP_TLV_IP_EXT: - case EIGRP_TLV_AT_INT: - case EIGRP_TLV_AT_EXT: - case EIGRP_TLV_AT_CABLE_SETUP: case EIGRP_TLV_IPX_INT: 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(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; @@ -251,5 +470,5 @@ eigrp_print(register const u_char *pptr, register u_int len) { } return; trunc: - printf("\n\t\t packet exceeded snapshot"); + ND_PRINT((ndo, "\n\t\t packet exceeded snapshot")); }