/*
- * Copyright (c) 1998-2004 Hannes Gredler <hannes@tcpdump.org>
+ * Copyright (c) 1998-2004 Hannes Gredler <hannes@gredler.at>
* The TCPDUMP project
*
* Redistribution and use in source and binary forms, with or without
* FOR A PARTICULAR PURPOSE.
*/
-#define NETDISSECT_REWORKED
+/* \summary: Enhanced Interior Gateway Routing Protocol (EIGRP) printer */
+
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
-#include <tcpdump-stdinc.h>
+#include <netdissect-stdinc.h>
#include <string.h>
-#include "interface.h"
+#include "netdissect.h"
#include "extract.h"
#include "addrtoname.h"
/*
* packet format documented at
* http://www.rhyshaden.com/eigrp.htm
+ * RFC 7868
*/
struct eigrp_common_header {
/* ok they seem to want to know everything - lets fully decode it */
+ if (len < sizeof(struct eigrp_common_header)) {
+ ND_PRINT((ndo, "EIGRP %s, length: %u (too short, < %u)",
+ tok2str(eigrp_opcode_values, "unknown (%u)",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 */
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_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),
+ EXTRACT_BE_U_4(&eigrp_com_header->flags)),
+ EXTRACT_BE_U_4(&eigrp_com_header->seq),
+ EXTRACT_BE_U_4(&eigrp_com_header->ack),
+ EXTRACT_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 ? */
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);
+ eigrp_tlv_len=EXTRACT_BE_U_2(&eigrp_tlv_header->length);
+ eigrp_tlv_type=EXTRACT_BE_U_2(&eigrp_tlv_header->type);
if (eigrp_tlv_len < sizeof(struct eigrp_tlv_header) ||
eigrp_tlv_type,
eigrp_tlv_len));
+ if (eigrp_tlv_len < sizeof(struct eigrp_tlv_header)) {
+ ND_PRINT((ndo, " (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);
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((ndo, " (too short, < %u)",
+ (u_int) (sizeof(struct eigrp_tlv_header) + sizeof(*tlv_ptr.eigrp_tlv_general_parm))));
+ break;
+ }
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),
+ EXTRACT_BE_U_2(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,
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((ndo, " (too short, < %u)",
+ (u_int) (sizeof(struct eigrp_tlv_header) + sizeof(*tlv_ptr.eigrp_tlv_sw_version))));
+ break;
+ }
ND_PRINT((ndo, "\n\t IOS version: %u.%u, EIGRP version %u.%u",
tlv_ptr.eigrp_tlv_sw_version->ios_major,
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((ndo, " (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;
if (bit_length > 32) {
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)
+ if (EXTRACT_BE_U_4(&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),
+ (EXTRACT_BE_U_4(&tlv_ptr.eigrp_tlv_ip_int->delay)/100),
+ EXTRACT_BE_U_4(&tlv_ptr.eigrp_tlv_ip_int->bandwidth),
+ EXTRACT_BE_U_3(&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));
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((ndo, " (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;
if (bit_length > 32) {
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)
+ if (EXTRACT_BE_U_4(&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),
+ EXTRACT_BE_U_4(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)));
+ EXTRACT_BE_U_4(tlv_ptr.eigrp_tlv_ip_ext->tag),
+ EXTRACT_BE_U_4(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),
+ (EXTRACT_BE_U_4(&tlv_ptr.eigrp_tlv_ip_ext->delay)/100),
+ EXTRACT_BE_U_4(&tlv_ptr.eigrp_tlv_ip_ext->bandwidth),
+ EXTRACT_BE_U_3(&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));
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((ndo, " (too short, < %u)",
+ (u_int) (sizeof(struct eigrp_tlv_header) + sizeof(*tlv_ptr.eigrp_tlv_at_cable_setup))));
+ break;
+ }
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)));
+ EXTRACT_BE_U_2(&tlv_ptr.eigrp_tlv_at_cable_setup->cable_start),
+ EXTRACT_BE_U_2(&tlv_ptr.eigrp_tlv_at_cable_setup->cable_end),
+ EXTRACT_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((ndo, " (too short, < %u)",
+ (u_int) (sizeof(struct eigrp_tlv_header) + sizeof(*tlv_ptr.eigrp_tlv_at_int))));
+ break;
+ }
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)));
+ EXTRACT_BE_U_2(&tlv_ptr.eigrp_tlv_at_int->cable_start),
+ EXTRACT_BE_U_2(&tlv_ptr.eigrp_tlv_at_int->cable_end)));
- if (EXTRACT_32BITS(&tlv_ptr.eigrp_tlv_at_int->nexthop) == 0)
+ if (EXTRACT_BE_U_4(&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])));
+ EXTRACT_BE_U_2(&tlv_ptr.eigrp_tlv_at_int->nexthop),
+ EXTRACT_BE_U_2(&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),
+ (EXTRACT_BE_U_4(&tlv_ptr.eigrp_tlv_at_int->delay)/100),
+ EXTRACT_BE_U_4(&tlv_ptr.eigrp_tlv_at_int->bandwidth),
+ EXTRACT_BE_U_3(&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));
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((ndo, " (too short, < %u)",
+ (u_int) (sizeof(struct eigrp_tlv_header) + sizeof(*tlv_ptr.eigrp_tlv_at_ext))));
+ break;
+ }
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)));
+ EXTRACT_BE_U_2(&tlv_ptr.eigrp_tlv_at_ext->cable_start),
+ EXTRACT_BE_U_2(&tlv_ptr.eigrp_tlv_at_ext->cable_end)));
- if (EXTRACT_32BITS(&tlv_ptr.eigrp_tlv_at_ext->nexthop) == 0)
+ if (EXTRACT_BE_U_4(&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])));
+ EXTRACT_BE_U_2(&tlv_ptr.eigrp_tlv_at_ext->nexthop),
+ EXTRACT_BE_U_2(&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),
+ EXTRACT_BE_U_4(tlv_ptr.eigrp_tlv_at_ext->origin_router),
+ EXTRACT_BE_U_4(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)));
+ EXTRACT_BE_U_4(tlv_ptr.eigrp_tlv_at_ext->tag),
+ EXTRACT_BE_U_2(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),
+ (EXTRACT_BE_U_4(&tlv_ptr.eigrp_tlv_at_ext->delay)/100),
+ EXTRACT_BE_U_4(&tlv_ptr.eigrp_tlv_at_ext->bandwidth),
+ EXTRACT_BE_U_3(&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));
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