/*
- * 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
/* \summary: Enhanced Interior Gateway Routing Protocol (EIGRP) printer */
-#ifdef HAVE_CONFIG_H
-#include "config.h"
-#endif
+/*
+ * specification:
+ *
+ * https://web.archive.org/web/20190722221712/https://www.rhyshaden.com/eigrp.htm
+ * RFC 7868
+ */
-#include <netdissect-stdinc.h>
+#include <config.h>
+
+#include "netdissect-stdinc.h"
#include <string.h>
+#define ND_LONGJMP_FROM_TCHECK
#include "netdissect.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];
+ nd_uint8_t version;
+ nd_uint8_t opcode;
+ nd_uint16_t checksum;
+ nd_uint32_t flags;
+ nd_uint32_t seq;
+ nd_uint32_t ack;
+ nd_uint16_t vrid;
+ nd_uint16_t asn;
};
#define EIGRP_VERSION 2
static const struct tok eigrp_common_header_flag_values[] = {
{ 0x01, "Init" },
{ 0x02, "Conditionally Received" },
+ { 0x04, "Restart" },
+ { 0x08, "End-of-Table" },
{ 0, NULL}
};
struct eigrp_tlv_header {
- uint8_t type[2];
- uint8_t length[2];
+ nd_uint16_t type;
+ nd_uint16_t length;
};
#define EIGRP_TLV_GENERAL_PARM 0x0001
};
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];
+ nd_uint8_t k1;
+ nd_uint8_t k2;
+ nd_uint8_t k3;
+ nd_uint8_t k4;
+ nd_uint8_t k5;
+ nd_uint8_t res;
+ nd_uint16_t holdtime;
};
struct eigrp_tlv_sw_version_t {
- uint8_t ios_major;
- uint8_t ios_minor;
- uint8_t eigrp_major;
- uint8_t eigrp_minor;
+ nd_uint8_t ios_major;
+ nd_uint8_t ios_minor;
+ nd_uint8_t eigrp_major;
+ nd_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 */
+ nd_ipv4 nexthop;
+ nd_uint32_t delay;
+ nd_uint32_t bandwidth;
+ nd_uint24_t mtu;
+ nd_uint8_t hopcount;
+ nd_uint8_t reliability;
+ nd_uint8_t load;
+ nd_byte reserved[2];
+ nd_uint8_t plen;
+ nd_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 */
+ nd_ipv4 nexthop;
+ nd_ipv4 origin_router;
+ nd_uint32_t origin_as;
+ nd_uint32_t tag;
+ nd_uint32_t metric;
+ nd_byte reserved[2];
+ nd_uint8_t proto_id;
+ nd_uint8_t flags;
+ nd_uint32_t delay;
+ nd_uint32_t bandwidth;
+ nd_uint24_t mtu;
+ nd_uint8_t hopcount;
+ nd_uint8_t reliability;
+ nd_uint8_t load;
+ nd_byte reserved2[2];
+ nd_uint8_t plen;
+ nd_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];
+ nd_uint16_t cable_start;
+ nd_uint16_t cable_end;
+ nd_uint32_t router_id;
};
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];
+ nd_byte nexthop[4];
+ nd_uint32_t delay;
+ nd_uint32_t bandwidth;
+ nd_uint24_t mtu;
+ nd_uint8_t hopcount;
+ nd_uint8_t reliability;
+ nd_uint8_t load;
+ nd_byte reserved[2];
+ nd_uint16_t cable_start;
+ nd_uint16_t cable_end;
};
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];
+ nd_byte nexthop[4];
+ nd_uint32_t origin_router;
+ nd_uint32_t origin_as;
+ nd_uint32_t tag;
+ nd_uint8_t proto_id;
+ nd_uint8_t flags;
+ nd_uint16_t metric;
+ nd_uint32_t delay;
+ nd_uint32_t bandwidth;
+ nd_uint24_t mtu;
+ nd_uint8_t hopcount;
+ nd_uint8_t reliability;
+ nd_uint8_t load;
+ nd_byte reserved2[2];
+ nd_uint16_t cable_start;
+ nd_uint16_t cable_end;
};
static const struct tok eigrp_ext_proto_id_values[] = {
};
void
-eigrp_print(netdissect_options *ndo, register const u_char *pptr, register u_int len)
+eigrp_print(netdissect_options *ndo, const u_char *pptr, u_int len)
{
const struct eigrp_common_header *eigrp_com_header;
const struct eigrp_tlv_header *eigrp_tlv_header;
const struct eigrp_tlv_at_ext_t *eigrp_tlv_at_ext;
} tlv_ptr;
+ ndo->ndo_protocol = "eigrp";
tptr=pptr;
+ tlen = len;
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;
+ if (len < sizeof(struct eigrp_common_header)) {
+ ND_PRINT("EIGRP %s, length: %u (too short, < %zu)",
+ tok2str(eigrp_opcode_values, "unknown (%u)",GET_U_1(eigrp_com_header->opcode)),
+ len, sizeof(struct eigrp_common_header));
+ goto check_remainder;
+ }
+ if (GET_U_1(eigrp_com_header->version) != EIGRP_VERSION) {
+ ND_PRINT("EIGRP version %u packet not supported",
+ GET_U_1(eigrp_com_header->version));
+ goto check_remainder;
}
/* 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;
+ ND_PRINT("EIGRP %s, length: %u",
+ tok2str(eigrp_opcode_values, "unknown (%u)",GET_U_1(eigrp_com_header->opcode)),
+ len);
+ goto check_remainder;
}
/* 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,
+ tlen -= sizeof(struct eigrp_common_header);
+
+ ND_PRINT("\n\tEIGRP v%u, opcode: %s (%u), chksum: 0x%04x, Flags: [%s]"
+ "\n\tseq: 0x%08x, ack: 0x%08x, VRID: %u, AS: %u, length: %u",
+ GET_U_1(eigrp_com_header->version),
+ tok2str(eigrp_opcode_values, "unknown, type: %u",GET_U_1(eigrp_com_header->opcode)),
+ GET_U_1(eigrp_com_header->opcode),
+ GET_BE_U_2(eigrp_com_header->checksum),
+ bittok2str(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;
+ GET_BE_U_4(eigrp_com_header->flags)),
+ GET_BE_U_4(eigrp_com_header->seq),
+ GET_BE_U_4(eigrp_com_header->ack),
+ GET_BE_U_2(eigrp_com_header->vrid),
+ GET_BE_U_2(eigrp_com_header->asn),
+ tlen);
+
+ tptr+=sizeof(struct eigrp_common_header);
+
+ while(tlen != 0) {
+ if (tlen < sizeof(struct eigrp_tlv_header)) {
+ ND_PRINT("\n\t (only %u bytes of data)", tlen);
+ goto invalid;
}
+ eigrp_tlv_header = (const struct eigrp_tlv_header *)tptr;
+ eigrp_tlv_len=GET_BE_U_2(eigrp_tlv_header->length);
+ eigrp_tlv_type=GET_BE_U_2(eigrp_tlv_header->type);
- ND_PRINT((ndo, "\n\t %s TLV (0x%04x), length: %u",
+ ND_PRINT("\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);
+ if (eigrp_tlv_len < sizeof(struct eigrp_tlv_header) ||
+ eigrp_tlv_len > tlen) {
+ goto invalid;
+ }
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);
+ ND_TCHECK_LEN(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;
+ if (tlv_tlen < sizeof(*tlv_ptr.eigrp_tlv_general_parm)) {
+ ND_PRINT(" (too short, < %zu)",
+ 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),
- 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));
+ ND_PRINT("\n\t holdtime: %us, k1 %u, k2 %u, k3 %u, k4 %u, k5 %u",
+ GET_BE_U_2(tlv_ptr.eigrp_tlv_general_parm->holdtime),
+ GET_U_1(tlv_ptr.eigrp_tlv_general_parm->k1),
+ GET_U_1(tlv_ptr.eigrp_tlv_general_parm->k2),
+ GET_U_1(tlv_ptr.eigrp_tlv_general_parm->k3),
+ GET_U_1(tlv_ptr.eigrp_tlv_general_parm->k4),
+ GET_U_1(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;
+ if (tlv_tlen < sizeof(*tlv_ptr.eigrp_tlv_sw_version)) {
+ ND_PRINT(" (too short, < %zu)",
+ 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,
- tlv_ptr.eigrp_tlv_sw_version->ios_minor,
- tlv_ptr.eigrp_tlv_sw_version->eigrp_major,
- tlv_ptr.eigrp_tlv_sw_version->eigrp_minor));
+ ND_PRINT("\n\t IOS version: %u.%u, EIGRP version %u.%u",
+ GET_U_1(tlv_ptr.eigrp_tlv_sw_version->ios_major),
+ GET_U_1(tlv_ptr.eigrp_tlv_sw_version->ios_minor),
+ GET_U_1(tlv_ptr.eigrp_tlv_sw_version->eigrp_major),
+ GET_U_1(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;
+ if (tlv_tlen < sizeof(*tlv_ptr.eigrp_tlv_ip_int)) {
+ ND_PRINT(" (too short, < %zu)",
+ sizeof(struct eigrp_tlv_header) + sizeof(*tlv_ptr.eigrp_tlv_ip_int));
+ break;
+ }
- bit_length = tlv_ptr.eigrp_tlv_ip_int->plen;
+ bit_length = GET_U_1(tlv_ptr.eigrp_tlv_ip_int->plen);
if (bit_length > 32) {
- ND_PRINT((ndo, "\n\t illegal prefix length %u",bit_length));
+ ND_PRINT("\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);
+ GET_CPY_BYTES(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"));
+ ND_PRINT("\n\t IPv4 prefix: %15s/%u, nexthop: ",
+ ipaddr_string(ndo, prefix), /* local buffer, not packet data; don't use GET_IPADDR_STRING() */
+ bit_length);
+ if (GET_BE_U_4(tlv_ptr.eigrp_tlv_ip_int->nexthop) == 0)
+ ND_PRINT("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));
+ ND_PRINT("%s",
+ GET_IPADDR_STRING(tlv_ptr.eigrp_tlv_ip_int->nexthop));
+
+ ND_PRINT("\n\t delay %u ms, bandwidth %u Kbps, mtu %u, hop %u, reliability %u, load %u",
+ (GET_BE_U_4(tlv_ptr.eigrp_tlv_ip_int->delay)/100),
+ GET_BE_U_4(tlv_ptr.eigrp_tlv_ip_int->bandwidth),
+ GET_BE_U_3(tlv_ptr.eigrp_tlv_ip_int->mtu),
+ GET_U_1(tlv_ptr.eigrp_tlv_ip_int->hopcount),
+ GET_U_1(tlv_ptr.eigrp_tlv_ip_int->reliability),
+ GET_U_1(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;
+ if (tlv_tlen < sizeof(*tlv_ptr.eigrp_tlv_ip_ext)) {
+ ND_PRINT(" (too short, < %zu)",
+ sizeof(struct eigrp_tlv_header) + sizeof(*tlv_ptr.eigrp_tlv_ip_ext));
+ break;
+ }
- bit_length = tlv_ptr.eigrp_tlv_ip_ext->plen;
+ bit_length = GET_U_1(tlv_ptr.eigrp_tlv_ip_ext->plen);
if (bit_length > 32) {
- ND_PRINT((ndo, "\n\t illegal prefix length %u",bit_length));
+ ND_PRINT("\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);
+ GET_CPY_BYTES(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"));
+ ND_PRINT("\n\t IPv4 prefix: %15s/%u, nexthop: ",
+ ipaddr_string(ndo, prefix), /* local buffer, not packet data; don't use GET_IPADDR_STRING() */
+ bit_length);
+ if (GET_BE_U_4(tlv_ptr.eigrp_tlv_ip_ext->nexthop) == 0)
+ ND_PRINT("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));
+ ND_PRINT("%s",
+ GET_IPADDR_STRING(tlv_ptr.eigrp_tlv_ip_ext->nexthop));
+
+ ND_PRINT("\n\t origin-router %s, origin-as %u, origin-proto %s, flags [0x%02x], tag 0x%08x, metric %u",
+ GET_IPADDR_STRING(tlv_ptr.eigrp_tlv_ip_ext->origin_router),
+ GET_BE_U_4(tlv_ptr.eigrp_tlv_ip_ext->origin_as),
+ tok2str(eigrp_ext_proto_id_values,"unknown",GET_U_1(tlv_ptr.eigrp_tlv_ip_ext->proto_id)),
+ GET_U_1(tlv_ptr.eigrp_tlv_ip_ext->flags),
+ GET_BE_U_4(tlv_ptr.eigrp_tlv_ip_ext->tag),
+ GET_BE_U_4(tlv_ptr.eigrp_tlv_ip_ext->metric));
+
+ ND_PRINT("\n\t delay %u ms, bandwidth %u Kbps, mtu %u, hop %u, reliability %u, load %u",
+ (GET_BE_U_4(tlv_ptr.eigrp_tlv_ip_ext->delay)/100),
+ GET_BE_U_4(tlv_ptr.eigrp_tlv_ip_ext->bandwidth),
+ GET_BE_U_3(tlv_ptr.eigrp_tlv_ip_ext->mtu),
+ GET_U_1(tlv_ptr.eigrp_tlv_ip_ext->hopcount),
+ GET_U_1(tlv_ptr.eigrp_tlv_ip_ext->reliability),
+ GET_U_1(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;
+ if (tlv_tlen < sizeof(*tlv_ptr.eigrp_tlv_at_cable_setup)) {
+ ND_PRINT(" (too short, < %zu)",
+ 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)));
+ ND_PRINT("\n\t Cable-range: %u-%u, Router-ID %u",
+ GET_BE_U_2(tlv_ptr.eigrp_tlv_at_cable_setup->cable_start),
+ GET_BE_U_2(tlv_ptr.eigrp_tlv_at_cable_setup->cable_end),
+ GET_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(" (too short, < %zu)",
+ 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)));
+ ND_PRINT("\n\t Cable-Range: %u-%u, nexthop: ",
+ GET_BE_U_2(tlv_ptr.eigrp_tlv_at_int->cable_start),
+ GET_BE_U_2(tlv_ptr.eigrp_tlv_at_int->cable_end));
- if (EXTRACT_32BITS(&tlv_ptr.eigrp_tlv_at_int->nexthop) == 0)
- ND_PRINT((ndo, "self"));
+ if (GET_BE_U_4(tlv_ptr.eigrp_tlv_at_int->nexthop) == 0)
+ ND_PRINT("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));
+ ND_PRINT("%u.%u",
+ GET_BE_U_2(&tlv_ptr.eigrp_tlv_at_int->nexthop[0]),
+ GET_BE_U_2(&tlv_ptr.eigrp_tlv_at_int->nexthop[2]));
+
+ ND_PRINT("\n\t delay %u ms, bandwidth %u Kbps, mtu %u, hop %u, reliability %u, load %u",
+ (GET_BE_U_4(tlv_ptr.eigrp_tlv_at_int->delay)/100),
+ GET_BE_U_4(tlv_ptr.eigrp_tlv_at_int->bandwidth),
+ GET_BE_U_3(tlv_ptr.eigrp_tlv_at_int->mtu),
+ GET_U_1(tlv_ptr.eigrp_tlv_at_int->hopcount),
+ GET_U_1(tlv_ptr.eigrp_tlv_at_int->reliability),
+ GET_U_1(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;
+ if (tlv_tlen < sizeof(*tlv_ptr.eigrp_tlv_at_ext)) {
+ ND_PRINT(" (too short, < %zu)",
+ 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)));
+ ND_PRINT("\n\t Cable-Range: %u-%u, nexthop: ",
+ GET_BE_U_2(tlv_ptr.eigrp_tlv_at_ext->cable_start),
+ GET_BE_U_2(tlv_ptr.eigrp_tlv_at_ext->cable_end));
- if (EXTRACT_32BITS(&tlv_ptr.eigrp_tlv_at_ext->nexthop) == 0)
- ND_PRINT((ndo, "self"));
+ if (GET_BE_U_4(tlv_ptr.eigrp_tlv_at_ext->nexthop) == 0)
+ ND_PRINT("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));
+ ND_PRINT("%u.%u",
+ GET_BE_U_2(&tlv_ptr.eigrp_tlv_at_ext->nexthop[0]),
+ GET_BE_U_2(&tlv_ptr.eigrp_tlv_at_ext->nexthop[2]));
+
+ ND_PRINT("\n\t origin-router %u, origin-as %u, origin-proto %s, flags [0x%02x], tag 0x%08x, metric %u",
+ GET_BE_U_4(tlv_ptr.eigrp_tlv_at_ext->origin_router),
+ GET_BE_U_4(tlv_ptr.eigrp_tlv_at_ext->origin_as),
+ tok2str(eigrp_ext_proto_id_values,"unknown",GET_U_1(tlv_ptr.eigrp_tlv_at_ext->proto_id)),
+ GET_U_1(tlv_ptr.eigrp_tlv_at_ext->flags),
+ GET_BE_U_4(tlv_ptr.eigrp_tlv_at_ext->tag),
+ GET_BE_U_2(tlv_ptr.eigrp_tlv_at_ext->metric));
+
+ ND_PRINT("\n\t delay %u ms, bandwidth %u Kbps, mtu %u, hop %u, reliability %u, load %u",
+ (GET_BE_U_4(tlv_ptr.eigrp_tlv_at_ext->delay)/100),
+ GET_BE_U_4(tlv_ptr.eigrp_tlv_at_ext->bandwidth),
+ GET_BE_U_3(tlv_ptr.eigrp_tlv_at_ext->mtu),
+ GET_U_1(tlv_ptr.eigrp_tlv_at_ext->hopcount),
+ GET_U_1(tlv_ptr.eigrp_tlv_at_ext->reliability),
+ GET_U_1(tlv_ptr.eigrp_tlv_at_ext->load));
break;
/*
tlen-=eigrp_tlv_len;
}
return;
-trunc:
- ND_PRINT((ndo, "\n\t\t packet exceeded snapshot"));
+invalid:
+ nd_print_invalid(ndo);
+check_remainder:
+ ND_TCHECK_LEN(tptr, tlen);
}
projects / tcpdump / blobdiff