X-Git-Url: https://git.tcpdump.org/tcpdump/blobdiff_plain/e478ad40dd6830d28993b50765bcf13a143b8957..9bdbb51f4122817ca8bdba9fb9917969809ff451:/print-eigrp.c diff --git a/print-eigrp.c b/print-eigrp.c index 38793682..2787bafb 100644 --- a/print-eigrp.c +++ b/print-eigrp.c @@ -16,7 +16,7 @@ #ifndef lint static const char rcsid[] _U_ = - "@(#) $Header: /tcpdump/master/tcpdump/print-eigrp.c,v 1.3 2004-05-01 09:07:01 hannes Exp $"; + "@(#) $Header: /tcpdump/master/tcpdump/print-eigrp.c,v 1.7 2005-05-06 02:53:26 guy Exp $"; #endif #ifdef HAVE_CONFIG_H @@ -134,22 +134,99 @@ struct eigrp_tlv_ip_int_t { u_int8_t load; u_int8_t reserved[2]; u_int8_t plen; - u_int8_t destination; /* variable length [0-4] bytes encoding */ + u_int8_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 */ +}; + +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]; +}; + +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]; +}; + +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]; +}; + +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) { 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,byte_length, bit_length; + u_int tlen,eigrp_tlv_len,eigrp_tlv_type,tlv_tlen, byte_length, bit_length; u_int8_t prefix[4]; union { 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; @@ -194,15 +271,15 @@ eigrp_print(register const u_char *pptr, register u_int len) { while(tlen>0) { /* did we capture enough for fully decoding the object header ? */ - if (!TTEST2(*tptr, sizeof(struct eigrp_tlv_header))) - goto trunc; + 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) { + if (eigrp_tlv_len < sizeof(struct eigrp_tlv_header) || + eigrp_tlv_len > tlen) { print_unknown_data(tptr+sizeof(sizeof(struct eigrp_tlv_header)),"\n\t ",tlen); return; } @@ -218,8 +295,7 @@ eigrp_print(register const u_char *pptr, register u_int len) { 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; + TCHECK2(*tptr, eigrp_tlv_len); switch(eigrp_tlv_type) { @@ -249,7 +325,7 @@ eigrp_print(register const u_char *pptr, register u_int len) { 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 < 0 || bit_length > 32) { + if (bit_length > 32) { printf("\n\t illegal prefix length %u",bit_length); break; } @@ -263,7 +339,7 @@ eigrp_print(register const u_char *pptr, register u_int len) { if (EXTRACT_32BITS(&tlv_ptr.eigrp_tlv_ip_int->nexthop) == 0) printf("self"); else - printf("%s",ipaddr_string(EXTRACT_32BITS(&tlv_ptr.eigrp_tlv_ip_int->nexthop))); + 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), @@ -274,6 +350,106 @@ eigrp_print(register const u_char *pptr, register u_int len) { 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) { + printf("\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); + + printf("\n\t IPv4 prefix: %15s/%u, nexthop: ", + ipaddr_string(prefix), + bit_length); + if (EXTRACT_32BITS(&tlv_ptr.eigrp_tlv_ip_ext->nexthop) == 0) + printf("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); + break; + + case EIGRP_TLV_AT_CABLE_SETUP: + tlv_ptr.eigrp_tlv_at_cable_setup = (const struct eigrp_tlv_at_cable_setup_t *)tlv_tptr; + + 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)); + break; + + case EIGRP_TLV_AT_INT: + tlv_ptr.eigrp_tlv_at_int = (const struct eigrp_tlv_at_int_t *)tlv_tptr; + + 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)); + + if (EXTRACT_32BITS(&tlv_ptr.eigrp_tlv_at_int->nexthop) == 0) + printf("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); + break; + + case EIGRP_TLV_AT_EXT: + tlv_ptr.eigrp_tlv_at_ext = (const struct eigrp_tlv_at_ext_t *)tlv_tptr; + + 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)); + + if (EXTRACT_32BITS(&tlv_ptr.eigrp_tlv_at_ext->nexthop) == 0) + printf("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); + break; + /* * FIXME those are the defined TLVs that lack a decoder * you are welcome to contribute code ;-) @@ -282,10 +458,6 @@ 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_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: