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phunix/external/bsd/tcpdump/dist/print-eigrp.c
David van Moolenbroek b636d99d91 Import NetBSD tcpdump(8) 
For now, printing of Sun RPC requests is disabled because we do not
yet have the RPC header files.  This should affect basically noone,
as we do not have any RPC-based programs yet, for the same reason.

Change-Id: Ie7818faaaacdc104d8b2c37a68866b4ce18247d6
2017-03-21 22:00:21 +00:00

480 lines
17 KiB
C
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/*
* 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.
*/
#include <sys/cdefs.h>
#ifndef lint
__RCSID("$NetBSD: print-eigrp.c,v 1.6 2015/03/31 21:59:35 christos Exp $");
#endif
#define NETDISSECT_REWORKED
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include <tcpdump-stdinc.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 {
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
#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 {
uint8_t type[2];
uint8_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 {
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(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;
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_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;
ND_TCHECK(*eigrp_com_header);
/*
* Sanity checking of the header.
*/
if (eigrp_com_header->version != EIGRP_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 (ndo->ndo_vflag < 1) {
ND_PRINT((ndo, "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 */
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),
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 ? */
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 < sizeof(struct eigrp_tlv_header) ||
eigrp_tlv_len > tlen) {
print_unknown_data(ndo,tptr+sizeof(struct eigrp_tlv_header),"\n\t ",tlen);
return;
}
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));
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 ? */
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_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));
break;
case EIGRP_TLV_SW_VERSION:
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));
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;
/*
* 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 (ndo->ndo_vflag <= 1)
print_unknown_data(ndo,tlv_tptr,"\n\t ",tlv_tlen);
break;
}
/* do we want to see an additionally hexdump ? */
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;
tlen-=eigrp_tlv_len;
}
return;
trunc:
ND_PRINT((ndo, "\n\t\t packet exceeded snapshot"));
}
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