| /* |
| * Copyright (c) 1998-2004 Hannes Gredler <hannes@tcpdump.org> |
| * The TCPDUMP project |
| * |
| * 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, and (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. |
| * 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. |
| */ |
| |
| #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 |
| |
| #ifdef HAVE_CONFIG_H |
| #include "config.h" |
| #endif |
| |
| #include <tcpdump-stdinc.h> |
| |
| #include <stdio.h> |
| #include <stdlib.h> |
| #include <string.h> |
| |
| #include "interface.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]; |
| }; |
| |
| #define EIGRP_VERSION 2 |
| |
| #define EIGRP_OPCODE_UPDATE 1 |
| #define EIGRP_OPCODE_QUERY 3 |
| #define EIGRP_OPCODE_REPLY 4 |
| #define EIGRP_OPCODE_HELLO 5 |
| #define EIGRP_OPCODE_IPXSAP 6 |
| #define EIGRP_OPCODE_PROBE 7 |
| |
| static const struct tok eigrp_opcode_values[] = { |
| { EIGRP_OPCODE_UPDATE, "Update" }, |
| { EIGRP_OPCODE_QUERY, "Query" }, |
| { EIGRP_OPCODE_REPLY, "Reply" }, |
| { EIGRP_OPCODE_HELLO, "Hello" }, |
| { EIGRP_OPCODE_IPXSAP, "IPX SAP" }, |
| { EIGRP_OPCODE_PROBE, "Probe" }, |
| { 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]; |
| }; |
| |
| #define EIGRP_TLV_GENERAL_PARM 0x0001 |
| #define EIGRP_TLV_AUTH 0x0002 |
| #define EIGRP_TLV_SEQ 0x0003 |
| #define EIGRP_TLV_SW_VERSION 0x0004 |
| #define EIGRP_TLV_MCAST_SEQ 0x0005 |
| #define EIGRP_TLV_IP_INT 0x0102 |
| #define EIGRP_TLV_IP_EXT 0x0103 |
| #define EIGRP_TLV_AT_INT 0x0202 |
| #define EIGRP_TLV_AT_EXT 0x0203 |
| #define EIGRP_TLV_AT_CABLE_SETUP 0x0204 |
| #define EIGRP_TLV_IPX_INT 0x0302 |
| #define EIGRP_TLV_IPX_EXT 0x0303 |
| |
| static const struct tok eigrp_tlv_values[] = { |
| { EIGRP_TLV_GENERAL_PARM, "General Parameters"}, |
| { EIGRP_TLV_AUTH, "Authentication"}, |
| { EIGRP_TLV_SEQ, "Sequence"}, |
| { EIGRP_TLV_SW_VERSION, "Software Version"}, |
| { EIGRP_TLV_MCAST_SEQ, "Next Multicast Sequence"}, |
| { EIGRP_TLV_IP_INT, "IP Internal routes"}, |
| { EIGRP_TLV_IP_EXT, "IP External routes"}, |
| { EIGRP_TLV_AT_INT, "AppleTalk Internal routes"}, |
| { EIGRP_TLV_AT_EXT, "AppleTalk External routes"}, |
| { EIGRP_TLV_AT_CABLE_SETUP, "AppleTalk Cable setup"}, |
| { EIGRP_TLV_IPX_INT, "IPX Internal routes"}, |
| { EIGRP_TLV_IPX_EXT, "IPX External routes"}, |
| { 0, NULL} |
| }; |
| |
| 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]; |
| }; |
| |
| 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; |
| }; |
| |
| 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 */ |
| }; |
| |
| 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; |
| 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; |
| eigrp_com_header = (const struct eigrp_common_header *)pptr; |
| 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); |
| 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), |
| len); |
| return; |
| } |
| |
| /* ok they seem to want to know everything - lets fully decode it */ |
| |
| 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), |
| 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); |
| |
| tptr+=sizeof(const struct eigrp_common_header); |
| |
| while(tlen>0) { |
| /* did we capture enough for fully decoding the object header ? */ |
| 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 < sizeof(struct eigrp_tlv_header) || |
| eigrp_tlv_len > tlen) { |
| print_unknown_data(tptr+sizeof(struct eigrp_tlv_header),"\n\t ",tlen); |
| return; |
| } |
| |
| printf("\n\t %s TLV (0x%04x), length: %u", |
| tok2str(eigrp_tlv_values, |
| "Unknown", |
| eigrp_tlv_type), |
| eigrp_tlv_type, |
| 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 ? */ |
| 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_t *)tlv_tptr; |
| |
| 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); |
| break; |
| |
| case EIGRP_TLV_SW_VERSION: |
| tlv_ptr.eigrp_tlv_sw_version = (const struct eigrp_tlv_sw_version_t *)tlv_tptr; |
| |
| 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); |
| 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) { |
| 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_int->destination,byte_length); |
| |
| printf("\n\t IPv4 prefix: %15s/%u, nexthop: ", |
| ipaddr_string(prefix), |
| bit_length); |
| if (EXTRACT_32BITS(&tlv_ptr.eigrp_tlv_ip_int->nexthop) == 0) |
| printf("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); |
| 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 ;-) |
| */ |
| |
| case EIGRP_TLV_AUTH: |
| case EIGRP_TLV_SEQ: |
| case EIGRP_TLV_MCAST_SEQ: |
| case EIGRP_TLV_IPX_INT: |
| case EIGRP_TLV_IPX_EXT: |
| |
| default: |
| if (vflag <= 1) |
| print_unknown_data(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 ", |
| eigrp_tlv_len-sizeof(struct eigrp_tlv_header)); |
| |
| tptr+=eigrp_tlv_len; |
| tlen-=eigrp_tlv_len; |
| } |
| return; |
| trunc: |
| printf("\n\t\t packet exceeded snapshot"); |
| } |
