/* \summary: Border Gateway Protocol (BGP) printer */
+/* specification: RFC 4271 */
+
#ifdef HAVE_CONFIG_H
-#include "config.h"
+#include <config.h>
#endif
-#include <netdissect-stdinc.h>
+#include "netdissect-stdinc.h"
#include <stdio.h>
#include <string.h>
#define BGP_ROUTE_REFRESH_SIZE 23
#define bgp_attr_lenlen(flags, p) \
- (((flags) & 0x10) ? 2 : 1)
+ (((flags) & 0x10) ? 2U : 1U)
#define bgp_attr_len(flags, p) \
- (((flags) & 0x10) ? EXTRACT_BE_U_2(p) : EXTRACT_U_1(p))
+ (((flags) & 0x10) ? GET_BE_U_2(p) : GET_U_1(p))
#define BGPTYPE_ORIGIN 1
#define BGPTYPE_AS_PATH 2
#define BGPTYPE_RCID_PATH 13 /* deprecated RFC1863 */
#define BGPTYPE_MP_REACH_NLRI 14 /* RFC4760 */
#define BGPTYPE_MP_UNREACH_NLRI 15 /* RFC4760 */
-#define BGPTYPE_EXTD_COMMUNITIES 16 /* RFC4360 */
-#define BGPTYPE_AS4_PATH 17 /* RFC6793 */
-#define BGPTYPE_AGGREGATOR4 18 /* RFC6793 */
-#define BGPTYPE_PMSI_TUNNEL 22 /* RFC6514 */
-#define BGPTYPE_TUNNEL_ENCAP 23 /* RFC5512 */
-#define BGPTYPE_TRAFFIC_ENG 24 /* RFC5543 */
-#define BGPTYPE_IPV6_EXTD_COMMUNITIES 25 /* RFC5701 */
-#define BGPTYPE_AIGP 26 /* RFC7311 */
-#define BGPTYPE_PE_DISTINGUISHER_LABEL 27 /* RFC6514 */
-#define BGPTYPE_ENTROPY_LABEL 28 /* RFC6790 */
-#define BGPTYPE_LARGE_COMMUNITY 32 /* draft-ietf-idr-large-community-05 */
-#define BGPTYPE_ATTR_SET 128 /* RFC6368 */
-
-#define BGP_MP_NLRI_MINSIZE 3 /* End of RIB Marker detection */
+#define BGPTYPE_EXTD_COMMUNITIES 16 /* RFC4360 */
+#define BGPTYPE_AS4_PATH 17 /* RFC6793 */
+#define BGPTYPE_AGGREGATOR4 18 /* RFC6793 */
+#define BGPTYPE_PMSI_TUNNEL 22 /* RFC6514 */
+#define BGPTYPE_TUNNEL_ENCAP 23 /* RFC5512 */
+#define BGPTYPE_TRAFFIC_ENG 24 /* RFC5543 */
+#define BGPTYPE_IPV6_EXTD_COMMUNITIES 25 /* RFC5701 */
+#define BGPTYPE_AIGP 26 /* RFC7311 */
+#define BGPTYPE_PE_DISTINGUISHER_LABEL 27 /* RFC6514 */
+#define BGPTYPE_ENTROPY_LABEL 28 /* RFC6790 */
+#define BGPTYPE_LARGE_COMMUNITY 32 /* draft-ietf-idr-large-community-05 */
+#define BGPTYPE_ATTR_SET 128 /* RFC6368 */
+
+#define BGP_MP_NLRI_MINSIZE 3 /* End of RIB Marker detection */
static const struct tok bgp_attr_values[] = {
{ BGPTYPE_ORIGIN, "Origin"},
#define BGP_CAPCODE_ORF 3 /* RFC5291 */
#define BGP_CAPCODE_MR 4 /* RFC3107 */
#define BGP_CAPCODE_EXT_NH 5 /* RFC5549 */
+#define BGP_CAPCODE_ML 8 /* RFC8277 */
#define BGP_CAPCODE_RESTART 64 /* RFC4724 */
#define BGP_CAPCODE_AS_NEW 65 /* RFC6793 */
#define BGP_CAPCODE_DYN_CAP 67 /* draft-ietf-idr-dynamic-cap */
#define BGP_CAPCODE_MULTISESS 68 /* draft-ietf-idr-bgp-multisession */
#define BGP_CAPCODE_ADD_PATH 69 /* RFC7911 */
#define BGP_CAPCODE_ENH_RR 70 /* draft-keyur-bgp-enhanced-route-refresh */
+#define BGP_CAPCODE_LLGR 71 /* draft-uttaro-idr-bgp-persistence-05 */
#define BGP_CAPCODE_RR_CISCO 128
static const struct tok bgp_capcode_values[] = {
{ BGP_CAPCODE_ORF, "Cooperative Route Filtering"},
{ BGP_CAPCODE_MR, "Multiple Routes to a Destination"},
{ BGP_CAPCODE_EXT_NH, "Extended Next Hop Encoding"},
+ { BGP_CAPCODE_ML, "Multiple Labels"},
{ BGP_CAPCODE_RESTART, "Graceful Restart"},
{ BGP_CAPCODE_AS_NEW, "32-Bit AS Number"},
{ BGP_CAPCODE_DYN_CAP, "Dynamic Capability"},
{ BGP_CAPCODE_MULTISESS, "Multisession BGP"},
{ BGP_CAPCODE_ADD_PATH, "Multiple Paths"},
{ BGP_CAPCODE_ENH_RR, "Enhanced Route Refresh"},
+ { BGP_CAPCODE_LLGR, "Long-lived Graceful Restart"},
{ BGP_CAPCODE_RR_CISCO, "Route Refresh (Cisco)"},
{ 0, NULL}
};
{ 0, NULL}
};
-/* draft-ietf-idr-cease-subcode-02 */
+/* RFC 4486 */
#define BGP_NOTIFY_MINOR_CEASE_MAXPRFX 1
-/* draft-ietf-idr-shutdown-07 */
#define BGP_NOTIFY_MINOR_CEASE_SHUT 2
#define BGP_NOTIFY_MINOR_CEASE_RESET 4
-#define BGP_NOTIFY_MINOR_CEASE_ADMIN_SHUTDOWN_LEN 128
static const struct tok bgp_notify_minor_cease_values[] = {
{ BGP_NOTIFY_MINOR_CEASE_MAXPRFX, "Maximum Number of Prefixes Reached"},
{ BGP_NOTIFY_MINOR_CEASE_SHUT, "Administrative Shutdown"},
#define SAFNUM_VPLS 65
/* RFC6037 */
#define SAFNUM_MDT 66
+/* RFC7432 */
+#define SAFNUM_EVPN 70
/* RFC4364 */
#define SAFNUM_VPNUNICAST 128
/* RFC6513 */
{ SAFNUM_TUNNEL, "Tunnel"},
{ SAFNUM_VPLS, "VPLS"},
{ SAFNUM_MDT, "MDT"},
+ { SAFNUM_EVPN, "EVPN"},
{ SAFNUM_VPNUNICAST, "labeled VPN Unicast"},
{ SAFNUM_VPNMULTICAST, "labeled VPN Multicast"},
{ SAFNUM_VPNUNIMULTICAST, "labeled VPN Unicast+Multicast"},
#define BGP_COMMUNITY_NO_ADVERT 0xffffff02
#define BGP_COMMUNITY_NO_EXPORT_SUBCONFED 0xffffff03
-/* Extended community type - draft-ietf-idr-bgp-ext-communities-05 */
+/* Extended community type - RFC 4360 */
#define BGP_EXT_COM_RT_0 0x0002 /* Route Target,Format AS(2bytes):AN(4bytes) */
#define BGP_EXT_COM_RT_1 0x0102 /* Route Target,Format IP address:AN(2bytes) */
#define BGP_EXT_COM_RT_2 0x0202 /* Route Target,Format AN(4bytes):local(2bytes) */
#define BGP_EXT_COM_OSPF_RTYPE 0x0306 /* OSPF Route Type,Format Area(4B):RouteType(1B):Options(1B) */
#define BGP_EXT_COM_OSPF_RTYPE2 0x8000 /* duplicate - keep for backwards compatibility */
+#define BGP_EXT_COM_ENCAP 0x030c /* rfc5512 */
#define BGP_EXT_COM_OSPF_RID 0x0107 /* OSPF Router ID,Format RouterID(4B):Unused(2B) */
#define BGP_EXT_COM_OSPF_RID2 0x8001 /* duplicate - keep for backwards compatibility */
#define BGP_EXT_COM_L2VPN_RT_0 0x000a /* L2VPN Identifier,Format AS(2bytes):AN(4bytes) */
#define BGP_EXT_COM_L2VPN_RT_1 0xF10a /* L2VPN Identifier,Format IP address:AN(2bytes) */
-/* http://www.cisco.com/en/US/tech/tk436/tk428/technologies_tech_note09186a00801eb09a.shtml */
+/* https://www.cisco.com/en/US/tech/tk436/tk428/technologies_tech_note09186a00801eb09a.shtml */
#define BGP_EXT_COM_EIGRP_GEN 0x8800
#define BGP_EXT_COM_EIGRP_METRIC_AS_DELAY 0x8801
#define BGP_EXT_COM_EIGRP_METRIC_REL_NH_BW 0x8802
{ BGP_EXT_COM_VPN_ORIGIN4, "ospf-domain"},
{ BGP_EXT_COM_OSPF_RTYPE, "ospf-route-type"},
{ BGP_EXT_COM_OSPF_RTYPE2, "ospf-route-type"},
+ { BGP_EXT_COM_ENCAP, "encapsulation"},
{ BGP_EXT_COM_OSPF_RID, "ospf-router-id"},
{ BGP_EXT_COM_OSPF_RID2, "ospf-router-id"},
{ BGP_EXT_COM_L2INFO, "layer2-info"},
- { BGP_EXT_COM_EIGRP_GEN , "eigrp-general-route (flag, tag)" },
- { BGP_EXT_COM_EIGRP_METRIC_AS_DELAY , "eigrp-route-metric (AS, delay)" },
- { BGP_EXT_COM_EIGRP_METRIC_REL_NH_BW , "eigrp-route-metric (reliability, nexthop, bandwidth)" },
- { BGP_EXT_COM_EIGRP_METRIC_LOAD_MTU , "eigrp-route-metric (load, MTU)" },
- { BGP_EXT_COM_EIGRP_EXT_REMAS_REMID , "eigrp-external-route (remote-AS, remote-ID)" },
- { BGP_EXT_COM_EIGRP_EXT_REMPROTO_REMMETRIC , "eigrp-external-route (remote-proto, remote-metric)" },
+ { BGP_EXT_COM_EIGRP_GEN, "eigrp-general-route (flag, tag)" },
+ { BGP_EXT_COM_EIGRP_METRIC_AS_DELAY, "eigrp-route-metric (AS, delay)" },
+ { BGP_EXT_COM_EIGRP_METRIC_REL_NH_BW, "eigrp-route-metric (reliability, nexthop, bandwidth)" },
+ { BGP_EXT_COM_EIGRP_METRIC_LOAD_MTU, "eigrp-route-metric (load, MTU)" },
+ { BGP_EXT_COM_EIGRP_EXT_REMAS_REMID, "eigrp-external-route (remote-AS, remote-ID)" },
+ { BGP_EXT_COM_EIGRP_EXT_REMPROTO_REMMETRIC, "eigrp-external-route (remote-proto, remote-metric)" },
{ BGP_EXT_COM_SOURCE_AS, "source-AS" },
{ BGP_EXT_COM_VRF_RT_IMP, "vrf-route-import"},
{ BGP_EXT_COM_L2VPN_RT_0, "l2vpn-id"},
{ 0, NULL},
};
+/* RFC RFC5512 BGP Tunnel Encapsulation Attribute Tunnel Types */
+#define BGP_ENCAP_TUNNEL_L2TPV3_IP 1
+#define BGP_ENCAP_TUNNEL_GRE 2
+#define BGP_ENCAP_TUNNEL_TRANSMIT 3
+#define BGP_ENCAP_TUNNEL_IPSEC 4
+#define BGP_ENCAP_TUNNEL_IP_IPSEC 5
+#define BGP_ENCAP_TUNNEL_MPLS_IP 6
+#define BGP_ENCAP_TUNNEL_IP_IP 7
+#define BGP_ENCAP_TUNNEL_VXLAN 8
+#define BGP_ENCAP_TUNNEL_NVGRE 9
+#define BGP_ENCAP_TUNNEL_MPLS 10
+#define BGP_ENCAP_TUNNEL_MPLS_GRE 11
+#define BGP_ENCAP_TUNNEL_VXLAN_GPE 12
+#define BGP_ENCAP_TUNNEL_MPLS_UDP 13
+#define BGP_ENCAP_TUNNEL_IPV6 14
+#define BGP_ENCAP_TUNNEL_SR_TE 15
+#define BGP_ENCAP_TUNNEL_BARE 16
+#define BGP_ENCAP_TUNNEL_SR 17
+
+static const struct tok bgp_extd_comm_encap_tunnel_values[] = {
+ { BGP_ENCAP_TUNNEL_L2TPV3_IP, "L2TPv3 over IP"},
+ { BGP_ENCAP_TUNNEL_GRE, "GRE"},
+ { BGP_ENCAP_TUNNEL_TRANSMIT, "Transmit Tunnel"},
+ { BGP_ENCAP_TUNNEL_IPSEC, "IPsec"},
+ { BGP_ENCAP_TUNNEL_IP_IPSEC, "IP in IP with IPsec"},
+ { BGP_ENCAP_TUNNEL_MPLS_IP, "MPLS in IP with IPsec"},
+ { BGP_ENCAP_TUNNEL_IP_IP, "IP in IP"},
+ { BGP_ENCAP_TUNNEL_VXLAN, "VXLAN"},
+ { BGP_ENCAP_TUNNEL_NVGRE, "NVGRE"},
+ { BGP_ENCAP_TUNNEL_MPLS, "MPLS"},
+ { BGP_ENCAP_TUNNEL_MPLS_GRE, "MPLS in GRE"},
+ { BGP_ENCAP_TUNNEL_VXLAN_GPE, "VXLAN GPE"},
+ { BGP_ENCAP_TUNNEL_MPLS_UDP, "MPLS in UDP"},
+ { BGP_ENCAP_TUNNEL_IPV6, "IPv6"},
+ { BGP_ENCAP_TUNNEL_SR_TE, "SR TE"},
+ { BGP_ENCAP_TUNNEL_BARE, "Bare"},
+ { BGP_ENCAP_TUNNEL_SR, "SR"},
+ { 0, NULL},
+};
+
/* OSPF codes for BGP_EXT_COM_OSPF_RTYPE draft-rosen-vpns-ospf-bgp-mpls */
#define BGP_OSPF_RTYPE_RTR 1 /* OSPF Router LSA */
#define BGP_OSPF_RTYPE_NET 2 /* OSPF Network LSA */
{ 0, NULL },
};
-static char astostr[20];
+#define AS_STR_SIZE sizeof("xxxxx.xxxxx")
/*
* as_printf
*/
static char *
as_printf(netdissect_options *ndo,
- char *str, int size, u_int asnum)
+ char *str, size_t size, u_int asnum)
{
if (!ndo->ndo_bflag || asnum <= 0xFFFF) {
snprintf(str, size, "%u", asnum);
int
decode_prefix4(netdissect_options *ndo,
- const u_char *pptr, u_int itemlen, char *buf, u_int buflen)
+ const u_char *pptr, u_int itemlen, char *buf, size_t buflen)
{
- struct in_addr addr;
+ nd_ipv4 addr;
u_int plen, plenbytes;
- ND_TCHECK_1(pptr);
ITEMCHECK(1);
- plen = EXTRACT_U_1(pptr);
+ plen = GET_U_1(pptr);
if (32 < plen)
return -1;
itemlen -= 1;
memset(&addr, 0, sizeof(addr));
plenbytes = (plen + 7) / 8;
- ND_TCHECK_LEN(pptr + 1, plenbytes);
ITEMCHECK(plenbytes);
- memcpy(&addr, pptr + 1, plenbytes);
+ GET_CPY_BYTES(&addr, pptr + 1, plenbytes);
if (plen % 8) {
((u_char *)&addr)[plenbytes - 1] &= ((0xff00 >> (plen % 8)) & 0xff);
}
- snprintf(buf, buflen, "%s/%d", ipaddr_string(ndo, &addr), plen);
+ snprintf(buf, buflen, "%s/%u", ipaddr_string(ndo, (const u_char *)&addr), plen);
return 1 + plenbytes;
-trunc:
- return -2;
-
badtlv:
- return -3;
+ return -2;
}
static int
decode_labeled_prefix4(netdissect_options *ndo,
- const u_char *pptr, u_int itemlen, char *buf, u_int buflen)
+ const u_char *pptr, u_int itemlen, char *buf,
+ size_t buflen)
{
- struct in_addr addr;
+ nd_ipv4 addr;
u_int plen, plenbytes;
/* prefix length and label = 4 bytes */
ND_TCHECK_4(pptr);
ITEMCHECK(4);
- plen = EXTRACT_U_1(pptr); /* get prefix length */
+ plen = GET_U_1(pptr); /* get prefix length */
/* this is one of the weirdnesses of rfc3107
the label length (actually the label + COS bits)
memset(&addr, 0, sizeof(addr));
plenbytes = (plen + 7) / 8;
- ND_TCHECK_LEN(pptr + 4, plenbytes);
ITEMCHECK(plenbytes);
- memcpy(&addr, pptr + 4, plenbytes);
+ GET_CPY_BYTES(&addr, pptr + 4, plenbytes);
if (plen % 8) {
((u_char *)&addr)[plenbytes - 1] &= ((0xff00 >> (plen % 8)) & 0xff);
}
/* the label may get offsetted by 4 bits so lets shift it right */
- snprintf(buf, buflen, "%s/%d, label:%u %s",
- ipaddr_string(ndo, &addr),
+ snprintf(buf, buflen, "%s/%u, label:%u %s",
+ ipaddr_string(ndo, (const u_char *)&addr),
plen,
- EXTRACT_BE_U_3(pptr + 1)>>4,
- ((pptr[3]&1)==0) ? "(BOGUS: Bottom of Stack NOT set!)" : "(bottom)" );
+ GET_BE_U_3(pptr + 1)>>4,
+ ((GET_U_1(pptr + 3) & 1) == 0) ? "(BOGUS: Bottom of Stack NOT set!)" : "(bottom)" );
return 4 + plenbytes;
/*
* bgp_vpn_ip_print
*
- * print an ipv4 or ipv6 address into a buffer dependend on address length.
+ * print an ipv4 or ipv6 address into a buffer dependent on address length.
*/
static char *
bgp_vpn_ip_print(netdissect_options *ndo,
char *pos = addr;
switch(addr_length) {
- case (sizeof(struct in_addr) << 3): /* 32 */
- ND_TCHECK_LEN(pptr, sizeof(struct in_addr));
- snprintf(pos, sizeof(addr), "%s", ipaddr_string(ndo, pptr));
+ case (sizeof(nd_ipv4) << 3): /* 32 */
+ snprintf(pos, sizeof(addr), "%s", GET_IPADDR_STRING(pptr));
break;
- case (sizeof(struct in6_addr) << 3): /* 128 */
- ND_TCHECK_LEN(pptr, sizeof(struct in6_addr));
- snprintf(pos, sizeof(addr), "%s", ip6addr_string(ndo, pptr));
+ case (sizeof(nd_ipv6) << 3): /* 128 */
+ snprintf(pos, sizeof(addr), "%s", GET_IP6ADDR_STRING(pptr));
break;
default:
snprintf(pos, sizeof(addr), "bogus address length %u", addr_length);
}
pos += strlen(pos);
-trunc:
*(pos) = '\0';
return (addr);
}
*
* return the number of bytes read from the wire.
*/
-static int
+static u_int
bgp_vpn_sg_print(netdissect_options *ndo,
- const u_char *pptr, char *buf, u_int buflen)
+ const u_char *pptr, char *buf, size_t buflen)
{
uint8_t addr_length;
u_int total_length, offset;
total_length = 0;
/* Source address length, encoded in bits */
- ND_TCHECK_1(pptr);
- addr_length = EXTRACT_U_1(pptr);
+ addr_length = GET_U_1(pptr);
pptr++;
/* Source address */
ND_TCHECK_LEN(pptr, (addr_length >> 3));
total_length += (addr_length >> 3) + 1;
- offset = strlen(buf);
+ offset = (u_int)strlen(buf);
if (addr_length) {
snprintf(buf + offset, buflen - offset, ", Source %s",
bgp_vpn_ip_print(ndo, pptr, addr_length));
}
/* Group address length, encoded in bits */
- ND_TCHECK_1(pptr);
- addr_length = EXTRACT_U_1(pptr);
+ addr_length = GET_U_1(pptr);
pptr++;
/* Group address */
ND_TCHECK_LEN(pptr, (addr_length >> 3));
total_length += (addr_length >> 3) + 1;
- offset = strlen(buf);
+ offset = (u_int)strlen(buf);
if (addr_length) {
snprintf(buf + offset, buflen - offset, ", Group %s",
bgp_vpn_ip_print(ndo, pptr, addr_length));
return (total_length);
}
-/* RDs and RTs share the same semantics
- * we use bgp_vpn_rd_print for
- * printing route targets inside a NLRI */
-char *
+/* Print an RFC 4364 Route Distinguisher */
+const char *
bgp_vpn_rd_print(netdissect_options *ndo,
const u_char *pptr)
{
/* allocate space for the largest possible string */
- static char rd[sizeof("xxxxxxxxxx:xxxxx (xxx.xxx.xxx.xxx:xxxxx)")];
+ static char rd[sizeof("xxxxx.xxxxx:xxxxx (xxx.xxx.xxx.xxx:xxxxx)")];
char *pos = rd;
+ /* allocate space for the largest possible string */
+ char astostr[AS_STR_SIZE];
/* ok lets load the RD format */
- switch (EXTRACT_BE_U_2(pptr)) {
+ switch (GET_BE_U_2(pptr)) {
- /* 2-byte-AS:number fmt*/
case 0:
+ /* 2-byte-AS:number fmt */
snprintf(pos, sizeof(rd) - (pos - rd), "%u:%u (= %u.%u.%u.%u)",
- EXTRACT_BE_U_2(pptr + 2),
- EXTRACT_BE_U_4(pptr + 4),
- EXTRACT_U_1(pptr + 4), EXTRACT_U_1(pptr + 5),
- EXTRACT_U_1(pptr + 6), EXTRACT_U_1(pptr + 7));
+ GET_BE_U_2(pptr + 2),
+ GET_BE_U_4(pptr + 4),
+ GET_U_1(pptr + 4), GET_U_1(pptr + 5),
+ GET_U_1(pptr + 6), GET_U_1(pptr + 7));
break;
- /* IP-address:AS fmt*/
case 1:
+ /* IP-address:AS fmt */
snprintf(pos, sizeof(rd) - (pos - rd), "%u.%u.%u.%u:%u",
- EXTRACT_U_1(pptr + 2), EXTRACT_U_1(pptr + 3),
- EXTRACT_U_1(pptr + 4), EXTRACT_U_1(pptr + 5),
- EXTRACT_BE_U_2(pptr + 6));
+ GET_U_1(pptr + 2), GET_U_1(pptr + 3),
+ GET_U_1(pptr + 4), GET_U_1(pptr + 5),
+ GET_BE_U_2(pptr + 6));
break;
- /* 4-byte-AS:number fmt*/
case 2:
+ /* 4-byte-AS:number fmt */
snprintf(pos, sizeof(rd) - (pos - rd), "%s:%u (%u.%u.%u.%u:%u)",
- as_printf(ndo, astostr, sizeof(astostr), EXTRACT_BE_U_4(pptr + 2)),
- EXTRACT_BE_U_2(pptr + 6), EXTRACT_U_1(pptr + 2),
- EXTRACT_U_1(pptr + 3), EXTRACT_U_1(pptr + 4),
- EXTRACT_U_1(pptr + 5), EXTRACT_BE_U_2(pptr + 6));
+ as_printf(ndo, astostr, sizeof(astostr), GET_BE_U_4(pptr + 2)),
+ GET_BE_U_2(pptr + 6), GET_U_1(pptr + 2),
+ GET_U_1(pptr + 3), GET_U_1(pptr + 4),
+ GET_U_1(pptr + 5), GET_BE_U_2(pptr + 6));
break;
default:
snprintf(pos, sizeof(rd) - (pos - rd), "unknown RD format");
return (rd);
}
+/*
+ * Print an RFC 4360 Extended Community.
+ */
+static void
+bgp_extended_community_print(netdissect_options *ndo,
+ const u_char *pptr)
+{
+ union { /* copy buffer for bandwidth values */
+ float f;
+ uint32_t i;
+ } bw;
+ /* allocate space for the largest possible string */
+ char astostr[AS_STR_SIZE];
+
+ switch (GET_BE_U_2(pptr)) {
+
+ case BGP_EXT_COM_RT_0:
+ case BGP_EXT_COM_RO_0:
+ case BGP_EXT_COM_L2VPN_RT_0:
+ ND_PRINT("%u:%u (= %s)",
+ GET_BE_U_2(pptr + 2),
+ GET_BE_U_4(pptr + 4),
+ GET_IPADDR_STRING(pptr+4));
+ break;
+
+ case BGP_EXT_COM_RT_1:
+ case BGP_EXT_COM_RO_1:
+ case BGP_EXT_COM_L2VPN_RT_1:
+ case BGP_EXT_COM_VRF_RT_IMP:
+ ND_PRINT("%s:%u",
+ GET_IPADDR_STRING(pptr+2),
+ GET_BE_U_2(pptr + 6));
+ break;
+
+ case BGP_EXT_COM_RT_2:
+ case BGP_EXT_COM_RO_2:
+ ND_PRINT("%s:%u",
+ as_printf(ndo, astostr, sizeof(astostr),
+ GET_BE_U_4(pptr + 2)), GET_BE_U_2(pptr + 6));
+ break;
+
+ case BGP_EXT_COM_LINKBAND:
+ bw.i = GET_BE_U_4(pptr + 4);
+ ND_PRINT("bandwidth: %.3f Mbps",
+ bw.f*8/1000000);
+ break;
+
+ case BGP_EXT_COM_VPN_ORIGIN:
+ case BGP_EXT_COM_VPN_ORIGIN2:
+ case BGP_EXT_COM_VPN_ORIGIN3:
+ case BGP_EXT_COM_VPN_ORIGIN4:
+ case BGP_EXT_COM_OSPF_RID:
+ case BGP_EXT_COM_OSPF_RID2:
+ ND_PRINT("%s", GET_IPADDR_STRING(pptr+2));
+ break;
+
+ case BGP_EXT_COM_OSPF_RTYPE:
+ case BGP_EXT_COM_OSPF_RTYPE2:
+ ND_PRINT("area:%s, router-type:%s, metric-type:%s%s",
+ GET_IPADDR_STRING(pptr+2),
+ tok2str(bgp_extd_comm_ospf_rtype_values,
+ "unknown (0x%02x)",
+ GET_U_1((pptr + 6))),
+ (GET_U_1(pptr + 7) & BGP_OSPF_RTYPE_METRIC_TYPE) ? "E2" : "",
+ ((GET_U_1(pptr + 6) == BGP_OSPF_RTYPE_EXT) || (GET_U_1(pptr + 6) == BGP_OSPF_RTYPE_NSSA)) ? "E1" : "");
+ break;
+
+ case BGP_EXT_COM_L2INFO:
+ ND_PRINT("%s Control Flags [0x%02x]:MTU %u",
+ tok2str(l2vpn_encaps_values,
+ "unknown encaps",
+ GET_U_1((pptr + 2))),
+ GET_U_1((pptr + 3)),
+ GET_BE_U_2(pptr + 4));
+ break;
+
+ case BGP_EXT_COM_SOURCE_AS:
+ ND_PRINT("AS %u", GET_BE_U_2(pptr + 2));
+ break;
+
+ case BGP_EXT_COM_ENCAP:
+ ND_PRINT("Tunnel type: %s", tok2str(bgp_extd_comm_encap_tunnel_values,
+ "unknown encaps",
+ GET_BE_U_2(pptr + 6)));
+ break;
+
+ default:
+ ND_PRINT("%02x%02x%02x%02x%02x%02x",
+ GET_U_1(pptr + 2),
+ GET_U_1(pptr + 3),
+ GET_U_1(pptr + 4),
+ GET_U_1(pptr + 5),
+ GET_U_1(pptr + 6),
+ GET_U_1(pptr + 7));
+ break;
+ }
+}
+
+/*
+ * RFC4684 (Section 4)/RFC2858 (Section 4).
+ * RTC membership prefix is structured as follows
+ * [prefix-len] [origin-as] [route-target]
+ * The route-target is encoded as RT ext-comms.
+ * Prefix-len may be 0, 32..96
+ *
+ * Note that pptr is not packet data - it is
+ * a buffer owned by our caller - therefore GET_*
+ * macros can not be used.
+ */
+static char *
+bgp_rt_prefix_print(netdissect_options *ndo,
+ const u_char *pptr,
+ u_int plen)
+{
+ /* allocate space for the largest possible string */
+ char rtc_prefix_in_hex[sizeof("0000 0000 0000 0000")] = "";
+ u_int rtc_prefix_in_hex_len = 0;
+ static char output[61]; /* max response string */
+ /* allocate space for the largest possible string */
+ char astostr[AS_STR_SIZE];
+ uint16_t ec_type = 0;
+ u_int octet_count;
+ u_int i;
+
+ if (plen == 0) {
+ snprintf(output, sizeof(output), "route-target: 0:0/0");
+ return (output);
+ }
+
+ /* hex representation of the prefix */
+ octet_count = (plen+7)/8;
+ for (i=0; i<octet_count; i++) {
+ rtc_prefix_in_hex_len += snprintf(rtc_prefix_in_hex+rtc_prefix_in_hex_len,
+ sizeof(rtc_prefix_in_hex)-rtc_prefix_in_hex_len,
+ "%02x%s", *(pptr+i),
+ ((i%2 == 1) && (i<octet_count-1)) ? " " : "");
+ }
+
+ if (plen < 16) {
+ /*
+ * The prefix is too short to include the full ext-comm type,
+ * so we have no way to parse it further.
+ */
+ snprintf(output, sizeof(output), "route-target: partial-type: (%s/%d)",
+ rtc_prefix_in_hex, plen);
+ return (output);
+ }
+
+ /*
+ * get the ext-comm type
+ * Note: pptr references a static 8 octet buffer with unused bits set to 0,
+ * hence EXTRACT_*() macros are safe.
+ */
+ ec_type = EXTRACT_BE_U_2(pptr);
+ switch (ec_type) {
+ case BGP_EXT_COM_RT_0:
+ /* 2-byte-AS:number fmt */
+ snprintf(output, sizeof(output), "route-target: %u:%u/%d (%s)",
+ EXTRACT_BE_U_2(pptr+2),
+ EXTRACT_BE_U_4(pptr+4),
+ plen, rtc_prefix_in_hex);
+ break;
+
+ case BGP_EXT_COM_RT_1:
+ /* IP-address:AS fmt */
+ snprintf(output, sizeof(output), "route-target: %u.%u.%u.%u:%u/%d (%s)",
+ *(pptr+2), *(pptr+3), *(pptr+4), *(pptr+5),
+ EXTRACT_BE_U_2(pptr+6), plen, rtc_prefix_in_hex);
+ break;
+
+ case BGP_EXT_COM_RT_2:
+ /* 4-byte-AS:number fmt */
+ snprintf(output, sizeof(output), "route-target: %s:%u/%d (%s)",
+ as_printf(ndo, astostr, sizeof(astostr), EXTRACT_BE_U_4(pptr+2)),
+ EXTRACT_BE_U_2(pptr+6), plen, rtc_prefix_in_hex);
+ break;
+
+ default:
+ snprintf(output, sizeof(output), "route target: unknown-type(%04x) (%s/%d)",
+ ec_type,
+ rtc_prefix_in_hex, plen);
+ break;
+ }
+ return (output);
+}
+
+/* RFC 4684 */
static int
decode_rt_routing_info(netdissect_options *ndo,
- const u_char *pptr, char *buf, u_int buflen)
+ const u_char *pptr)
{
uint8_t route_target[8];
u_int plen;
- char asbuf[sizeof(astostr)]; /* bgp_vpn_rd_print() overwrites astostr */
+ /* allocate space for the largest possible string */
+ char astostr[AS_STR_SIZE];
+ u_int num_octets;
/* NLRI "prefix length" from RFC 2858 Section 4. */
- ND_TCHECK_1(pptr);
- plen = EXTRACT_U_1(pptr); /* get prefix length */
+ plen = GET_U_1(pptr); /* get prefix length */
/* NLRI "prefix" (ibid), valid lengths are { 0, 32, 33, ..., 96 } bits.
* RFC 4684 Section 4 defines the layout of "origin AS" and "route
*/
if (0 == plen) {
/* Without "origin AS", without "route target". */
- snprintf(buf, buflen, "default route target");
+ ND_PRINT("\n\t default route target");
return 1;
}
- if (32 > plen)
+ if (32 > plen) {
+ ND_PRINT("\n\t (illegal prefix length)");
return -1;
+ }
/* With at least "origin AS", possibly with "route target". */
- ND_TCHECK_4(pptr + 1);
- as_printf(ndo, asbuf, sizeof(asbuf), EXTRACT_BE_U_4(pptr + 1));
+ as_printf(ndo, astostr, sizeof(astostr), GET_BE_U_4(pptr + 1));
plen -= 32; /* adjust prefix length */
- if (64 < plen)
+ if (64 < plen) {
+ ND_PRINT("\n\t (illegal prefix length)");
return -1;
+ }
/* From now on (plen + 7) / 8 evaluates to { 0, 1, 2, ..., 8 }
* and gives the number of octets in the variable-length "route
* target" field inside this NLRI "prefix". Look for it.
*/
memset(&route_target, 0, sizeof(route_target));
- ND_TCHECK_LEN(pptr + 5, (plen + 7) / 8);
- memcpy(&route_target, pptr + 5, (plen + 7) / 8);
- /* Which specification says to do this? */
+ num_octets = (plen + 7) / 8;
+ GET_CPY_BYTES(&route_target, pptr + 5, num_octets);
+ /* If mask-len is not on octet boundary, ensure all extra bits are 0 */
if (plen % 8) {
- ((u_char *)&route_target)[(plen + 7) / 8 - 1] &=
+ ((u_char *)&route_target)[num_octets - 1] &=
((0xff00 >> (plen % 8)) & 0xff);
}
- snprintf(buf, buflen, "origin AS: %s, route target %s",
- asbuf,
- bgp_vpn_rd_print(ndo, (u_char *)&route_target));
-
- return 5 + (plen + 7) / 8;
+ ND_PRINT("\n\t origin AS: %s, %s",
+ astostr,
+ bgp_rt_prefix_print(ndo, (u_char *)&route_target, plen));
-trunc:
- return -2;
+ return 5 + num_octets;
}
static int
decode_labeled_vpn_prefix4(netdissect_options *ndo,
- const u_char *pptr, char *buf, u_int buflen)
+ const u_char *pptr, char *buf, size_t buflen)
{
- struct in_addr addr;
+ nd_ipv4 addr;
u_int plen;
- ND_TCHECK_1(pptr);
- plen = EXTRACT_U_1(pptr); /* get prefix length */
+ plen = GET_U_1(pptr); /* get prefix length */
if ((24+64) > plen)
return -1;
return -1;
memset(&addr, 0, sizeof(addr));
- ND_TCHECK_LEN(pptr + 12, (plen + 7) / 8);
- memcpy(&addr, pptr + 12, (plen + 7) / 8);
+ GET_CPY_BYTES(&addr, pptr + 12, (plen + 7) / 8);
if (plen % 8) {
((u_char *)&addr)[(plen + 7) / 8 - 1] &=
((0xff00 >> (plen % 8)) & 0xff);
}
/* the label may get offsetted by 4 bits so lets shift it right */
- snprintf(buf, buflen, "RD: %s, %s/%d, label:%u %s",
- bgp_vpn_rd_print(ndo, pptr+4),
- ipaddr_string(ndo, &addr),
- plen,
- EXTRACT_BE_U_3(pptr + 1)>>4,
- ((pptr[3]&1)==0) ? "(BOGUS: Bottom of Stack NOT set!)" : "(bottom)" );
+ snprintf(buf, buflen, "RD: %s, %s/%u, label:%u %s",
+ bgp_vpn_rd_print(ndo, pptr+4),
+ ipaddr_string(ndo, (const u_char *)&addr),
+ plen,
+ GET_BE_U_3(pptr + 1)>>4,
+ ((GET_U_1(pptr + 3) & 1) == 0) ? "(BOGUS: Bottom of Stack NOT set!)" : "(bottom)" );
return 12 + (plen + 7) / 8;
-
-trunc:
- return -2;
}
/*
static int
decode_mdt_vpn_nlri(netdissect_options *ndo,
- const u_char *pptr, char *buf, u_int buflen)
+ const u_char *pptr, char *buf, size_t buflen)
{
const u_char *rd;
const u_char *vpn_ip;
- ND_TCHECK_1(pptr);
-
/* if the NLRI is not predefined length, quit.*/
- if (EXTRACT_U_1(pptr) != MDT_VPN_NLRI_LEN * 8)
+ if (GET_U_1(pptr) != MDT_VPN_NLRI_LEN * 8)
return -1;
pptr++;
pptr += 8;
/* IPv4 address */
- ND_TCHECK_LEN(pptr, sizeof(struct in_addr));
vpn_ip = pptr;
- pptr += sizeof(struct in_addr);
+ pptr += sizeof(nd_ipv4);
/* MDT Group Address */
- ND_TCHECK_LEN(pptr, sizeof(struct in_addr));
-
snprintf(buf, buflen, "RD: %s, VPN IP Address: %s, MC Group Address: %s",
- bgp_vpn_rd_print(ndo, rd), ipaddr_string(ndo, vpn_ip), ipaddr_string(ndo, pptr));
+ bgp_vpn_rd_print(ndo, rd), GET_IPADDR_STRING(vpn_ip), GET_IPADDR_STRING(pptr));
return MDT_VPN_NLRI_LEN + 1;
static int
decode_multicast_vpn(netdissect_options *ndo,
- const u_char *pptr, char *buf, u_int buflen)
+ const u_char *pptr, char *buf, size_t buflen)
{
- uint8_t route_type, route_length, addr_length, sg_length;
+ /* allocate space for the largest possible string */
+ char astostr[AS_STR_SIZE];
+ uint8_t route_type, route_length;
+ u_int addr_length, sg_length;
u_int offset;
- ND_TCHECK_2(pptr);
- route_type = EXTRACT_U_1(pptr);
+ route_type = GET_U_1(pptr);
pptr++;
- route_length = EXTRACT_U_1(pptr);
+ route_length = GET_U_1(pptr);
pptr++;
snprintf(buf, buflen, "Route-Type: %s (%u), length: %u",
switch(route_type) {
case BGP_MULTICAST_VPN_ROUTE_TYPE_INTRA_AS_I_PMSI:
ND_TCHECK_LEN(pptr, BGP_VPN_RD_LEN);
- offset = strlen(buf);
+ offset = (u_int)strlen(buf);
snprintf(buf + offset, buflen - offset, ", RD: %s, Originator %s",
- bgp_vpn_rd_print(ndo, pptr),
- bgp_vpn_ip_print(ndo, pptr + BGP_VPN_RD_LEN,
- (route_length - BGP_VPN_RD_LEN) << 3));
+ bgp_vpn_rd_print(ndo, pptr),
+ bgp_vpn_ip_print(ndo, pptr + BGP_VPN_RD_LEN,
+ (route_length - BGP_VPN_RD_LEN) << 3));
break;
case BGP_MULTICAST_VPN_ROUTE_TYPE_INTER_AS_I_PMSI:
ND_TCHECK_LEN(pptr, BGP_VPN_RD_LEN + 4);
- offset = strlen(buf);
+ offset = (u_int)strlen(buf);
snprintf(buf + offset, buflen - offset, ", RD: %s, Source-AS %s",
bgp_vpn_rd_print(ndo, pptr),
as_printf(ndo, astostr, sizeof(astostr),
- EXTRACT_BE_U_4(pptr + BGP_VPN_RD_LEN)));
+ GET_BE_U_4(pptr + BGP_VPN_RD_LEN)));
break;
case BGP_MULTICAST_VPN_ROUTE_TYPE_S_PMSI:
ND_TCHECK_LEN(pptr, BGP_VPN_RD_LEN);
- offset = strlen(buf);
+ offset = (u_int)strlen(buf);
snprintf(buf + offset, buflen - offset, ", RD: %s",
- bgp_vpn_rd_print(ndo, pptr));
+ bgp_vpn_rd_print(ndo, pptr));
pptr += BGP_VPN_RD_LEN;
sg_length = bgp_vpn_sg_print(ndo, pptr, buf, buflen);
addr_length = route_length - sg_length;
ND_TCHECK_LEN(pptr, addr_length);
- offset = strlen(buf);
+ offset = (u_int)strlen(buf);
snprintf(buf + offset, buflen - offset, ", Originator %s",
- bgp_vpn_ip_print(ndo, pptr, addr_length << 3));
+ bgp_vpn_ip_print(ndo, pptr, addr_length << 3));
break;
case BGP_MULTICAST_VPN_ROUTE_TYPE_SOURCE_ACTIVE:
ND_TCHECK_LEN(pptr, BGP_VPN_RD_LEN);
- offset = strlen(buf);
+ offset = (u_int)strlen(buf);
snprintf(buf + offset, buflen - offset, ", RD: %s",
- bgp_vpn_rd_print(ndo, pptr));
+ bgp_vpn_rd_print(ndo, pptr));
pptr += BGP_VPN_RD_LEN;
bgp_vpn_sg_print(ndo, pptr, buf, buflen);
case BGP_MULTICAST_VPN_ROUTE_TYPE_SHARED_TREE_JOIN: /* fall through */
case BGP_MULTICAST_VPN_ROUTE_TYPE_SOURCE_TREE_JOIN:
ND_TCHECK_LEN(pptr, BGP_VPN_RD_LEN + 4);
- offset = strlen(buf);
+ offset = (u_int)strlen(buf);
snprintf(buf + offset, buflen - offset, ", RD: %s, Source-AS %s",
- bgp_vpn_rd_print(ndo, pptr),
- as_printf(ndo, astostr, sizeof(astostr),
- EXTRACT_BE_U_4(pptr + BGP_VPN_RD_LEN)));
+ bgp_vpn_rd_print(ndo, pptr),
+ as_printf(ndo, astostr, sizeof(astostr),
+ GET_BE_U_4(pptr + BGP_VPN_RD_LEN)));
pptr += BGP_VPN_RD_LEN + 4;
bgp_vpn_sg_print(ndo, pptr, buf, buflen);
static int
decode_labeled_vpn_l2(netdissect_options *ndo,
- const u_char *pptr, char *buf, u_int buflen)
+ const u_char *pptr, char *buf, size_t buflen)
{
- int plen,tlen,stringlen,tlv_type,tlv_len,ttlv_len;
+ u_int plen, tlen, tlv_type, tlv_len, ttlv_len;
+ int stringlen;
- ND_TCHECK_2(pptr);
- plen=EXTRACT_BE_U_2(pptr);
- tlen=plen;
+ plen = GET_BE_U_2(pptr);
+ tlen = plen;
pptr += 2;
/* Old and new L2VPN NLRI share AFI/SAFI
* -> Assume a 12 Byte-length NLRI is auto-discovery-only
* and > 17 as old format. Complain for the middle case
*/
- if (plen==12) {
+ if (plen == 12) {
/* assume AD-only with RD, BGPNH */
ND_TCHECK_LEN(pptr, 12);
- buf[0]='\0';
- stringlen=snprintf(buf, buflen, "RD: %s, BGPNH: %s",
- bgp_vpn_rd_print(ndo, pptr),
- ipaddr_string(ndo, pptr+8)
- );
+ buf[0] = '\0';
+ stringlen = snprintf(buf, buflen, "RD: %s, BGPNH: %s",
+ bgp_vpn_rd_print(ndo, pptr),
+ GET_IPADDR_STRING(pptr+8));
UPDATE_BUF_BUFLEN(buf, buflen, stringlen);
- pptr+=12;
- tlen-=12;
- return plen;
- } else if (plen>17) {
+ pptr += 12;
+ tlen -= 12;
+ return plen + 2;
+ } else if (plen > 17) {
/* assume old format */
/* RD, ID, LBLKOFF, LBLBASE */
ND_TCHECK_LEN(pptr, 15);
- buf[0]='\0';
- stringlen=snprintf(buf, buflen, "RD: %s, CE-ID: %u, Label-Block Offset: %u, Label Base %u",
- bgp_vpn_rd_print(ndo, pptr),
- EXTRACT_BE_U_2(pptr + 8),
- EXTRACT_BE_U_2(pptr + 10),
- EXTRACT_BE_U_3(pptr + 12)>>4); /* the label is offsetted by 4 bits so lets shift it right */
+ buf[0] = '\0';
+ stringlen = snprintf(buf, buflen, "RD: %s, CE-ID: %u, Label-Block Offset: %u, Label Base %u",
+ bgp_vpn_rd_print(ndo, pptr),
+ GET_BE_U_2(pptr + 8),
+ GET_BE_U_2(pptr + 10),
+ GET_BE_U_3(pptr + 12)>>4); /* the label is offsetted by 4 bits so lets shift it right */
UPDATE_BUF_BUFLEN(buf, buflen, stringlen);
- pptr+=15;
- tlen-=15;
+ pptr += 15;
+ tlen -= 15;
/* ok now the variable part - lets read out TLVs*/
- while (tlen>0) {
- if (tlen < 3)
- return -1;
- ND_TCHECK_3(pptr);
- tlv_type=EXTRACT_U_1(pptr);
+ while (tlen != 0) {
+ if (tlen < 3) {
+ if (buflen != 0) {
+ stringlen=snprintf(buf,buflen, "\n\t\tran past the end");
+ UPDATE_BUF_BUFLEN(buf, buflen, stringlen);
+ }
+ return plen + 2;
+ }
+ tlv_type = GET_U_1(pptr);
pptr++;
- tlv_len=EXTRACT_BE_U_2(pptr);
- ttlv_len=tlv_len;
- pptr+=2;
+ tlv_len = GET_BE_U_2(pptr); /* length, in *bits* */
+ ttlv_len = (tlv_len + 7)/8; /* length, in *bytes* */
+ pptr += 2;
switch(tlv_type) {
case 1:
- if (buflen!=0) {
+ if (buflen != 0) {
stringlen=snprintf(buf,buflen, "\n\t\tcircuit status vector (%u) length: %u: 0x",
- tlv_type,
- tlv_len);
+ tlv_type,
+ tlv_len);
UPDATE_BUF_BUFLEN(buf, buflen, stringlen);
}
- ttlv_len=ttlv_len/8+1; /* how many bytes do we need to read ? */
- while (ttlv_len>0) {
+ while (ttlv_len != 0) {
+ if (tlen < 1) {
+ if (buflen != 0) {
+ stringlen=snprintf(buf,buflen, " (ran past the end)");
+ UPDATE_BUF_BUFLEN(buf, buflen, stringlen);
+ }
+ return plen + 2;
+ }
ND_TCHECK_1(pptr);
- if (buflen!=0) {
+ if (buflen != 0) {
stringlen=snprintf(buf,buflen, "%02x",
- EXTRACT_U_1(pptr));
+ GET_U_1(pptr));
pptr++;
UPDATE_BUF_BUFLEN(buf, buflen, stringlen);
}
ttlv_len--;
+ tlen--;
}
break;
default:
- if (buflen!=0) {
+ if (buflen != 0) {
stringlen=snprintf(buf,buflen, "\n\t\tunknown TLV #%u, length: %u",
- tlv_type,
- tlv_len);
+ tlv_type,
+ tlv_len);
UPDATE_BUF_BUFLEN(buf, buflen, stringlen);
}
+ if (tlen < ttlv_len) {
+ if (buflen != 0) {
+ stringlen=snprintf(buf,buflen, " (ran past the end)");
+ UPDATE_BUF_BUFLEN(buf, buflen, stringlen);
+ }
+ return plen + 2;
+ }
+ tlen -= ttlv_len;
break;
}
- tlen-=(tlv_len<<3); /* the tlv-length is expressed in bits so lets shift it right */
}
- return plen+2;
-
+ return plen + 2;
} else {
/* complain bitterly ? */
/* fall through */
int
decode_prefix6(netdissect_options *ndo,
- const u_char *pd, u_int itemlen, char *buf, u_int buflen)
+ const u_char *pd, u_int itemlen, char *buf, size_t buflen)
{
- struct in6_addr addr;
+ nd_ipv6 addr;
u_int plen, plenbytes;
- ND_TCHECK_1(pd);
ITEMCHECK(1);
- plen = EXTRACT_U_1(pd);
+ plen = GET_U_1(pd);
if (128 < plen)
return -1;
itemlen -= 1;
memset(&addr, 0, sizeof(addr));
plenbytes = (plen + 7) / 8;
- ND_TCHECK_LEN(pd + 1, plenbytes);
ITEMCHECK(plenbytes);
- memcpy(&addr, pd + 1, plenbytes);
+ GET_CPY_BYTES(&addr, pd + 1, plenbytes);
if (plen % 8) {
- addr.s6_addr[plenbytes - 1] &=
+ addr[plenbytes - 1] &=
((0xff00 >> (plen % 8)) & 0xff);
}
- snprintf(buf, buflen, "%s/%d", ip6addr_string(ndo, &addr), plen);
+ snprintf(buf, buflen, "%s/%u", ip6addr_string(ndo, (const u_char *)&addr), plen);
return 1 + plenbytes;
-trunc:
- return -2;
-
badtlv:
- return -3;
+ return -2;
}
static int
decode_labeled_prefix6(netdissect_options *ndo,
- const u_char *pptr, u_int itemlen, char *buf, u_int buflen)
+ const u_char *pptr, u_int itemlen, char *buf, size_t buflen)
{
- struct in6_addr addr;
+ nd_ipv6 addr;
u_int plen, plenbytes;
/* prefix length and label = 4 bytes */
ND_TCHECK_4(pptr);
ITEMCHECK(4);
- plen = EXTRACT_U_1(pptr); /* get prefix length */
+ plen = GET_U_1(pptr); /* get prefix length */
if (24 > plen)
return -1;
memset(&addr, 0, sizeof(addr));
plenbytes = (plen + 7) / 8;
- ND_TCHECK_LEN(pptr + 4, plenbytes);
- memcpy(&addr, pptr + 4, plenbytes);
+ GET_CPY_BYTES(&addr, pptr + 4, plenbytes);
if (plen % 8) {
- addr.s6_addr[plenbytes - 1] &=
+ addr[plenbytes - 1] &=
((0xff00 >> (plen % 8)) & 0xff);
}
/* the label may get offsetted by 4 bits so lets shift it right */
- snprintf(buf, buflen, "%s/%d, label:%u %s",
- ip6addr_string(ndo, &addr),
- plen,
- EXTRACT_BE_U_3(pptr + 1)>>4,
- ((pptr[3]&1)==0) ? "(BOGUS: Bottom of Stack NOT set!)" : "(bottom)" );
+ snprintf(buf, buflen, "%s/%u, label:%u %s",
+ ip6addr_string(ndo, (const u_char *)&addr),
+ plen,
+ GET_BE_U_3(pptr + 1)>>4,
+ ((GET_U_1(pptr + 3) & 1) == 0) ? "(BOGUS: Bottom of Stack NOT set!)" : "(bottom)" );
return 4 + plenbytes;
static int
decode_labeled_vpn_prefix6(netdissect_options *ndo,
- const u_char *pptr, char *buf, u_int buflen)
+ const u_char *pptr, char *buf, size_t buflen)
{
- struct in6_addr addr;
+ nd_ipv6 addr;
u_int plen;
- ND_TCHECK_1(pptr);
- plen = EXTRACT_U_1(pptr); /* get prefix length */
+ plen = GET_U_1(pptr); /* get prefix length */
if ((24+64) > plen)
return -1;
return -1;
memset(&addr, 0, sizeof(addr));
- ND_TCHECK_LEN(pptr + 12, (plen + 7) / 8);
- memcpy(&addr, pptr + 12, (plen + 7) / 8);
+ GET_CPY_BYTES(&addr, pptr + 12, (plen + 7) / 8);
if (plen % 8) {
- addr.s6_addr[(plen + 7) / 8 - 1] &=
+ addr[(plen + 7) / 8 - 1] &=
((0xff00 >> (plen % 8)) & 0xff);
}
/* the label may get offsetted by 4 bits so lets shift it right */
- snprintf(buf, buflen, "RD: %s, %s/%d, label:%u %s",
- bgp_vpn_rd_print(ndo, pptr+4),
- ip6addr_string(ndo, &addr),
- plen,
- EXTRACT_BE_U_3(pptr + 1)>>4,
- ((pptr[3]&1)==0) ? "(BOGUS: Bottom of Stack NOT set!)" : "(bottom)" );
+ snprintf(buf, buflen, "RD: %s, %s/%u, label:%u %s",
+ bgp_vpn_rd_print(ndo, pptr+4),
+ ip6addr_string(ndo, (const u_char *)&addr),
+ plen,
+ GET_BE_U_3(pptr + 1)>>4,
+ ((GET_U_1(pptr + 3) & 1) == 0) ? "(BOGUS: Bottom of Stack NOT set!)" : "(bottom)" );
return 12 + (plen + 7) / 8;
-
-trunc:
- return -2;
}
static int
decode_clnp_prefix(netdissect_options *ndo,
- const u_char *pptr, char *buf, u_int buflen)
+ const u_char *pptr, char *buf, size_t buflen)
{
uint8_t addr[19];
u_int plen;
- ND_TCHECK_1(pptr);
- plen = EXTRACT_U_1(pptr); /* get prefix length */
+ plen = GET_U_1(pptr); /* get prefix length */
if (152 < plen)
return -1;
memset(&addr, 0, sizeof(addr));
- ND_TCHECK_LEN(pptr + 4, (plen + 7) / 8);
- memcpy(&addr, pptr + 4, (plen + 7) / 8);
+ GET_CPY_BYTES(&addr, pptr + 4, (plen + 7) / 8);
if (plen % 8) {
addr[(plen + 7) / 8 - 1] &=
((0xff00 >> (plen % 8)) & 0xff);
}
- snprintf(buf, buflen, "%s/%d",
- isonsap_string(ndo, addr,(plen + 7) / 8),
- plen);
+ /* Cannot use GET_ISONSAP_STRING (not packet buffer pointer) */
+ snprintf(buf, buflen, "%s/%u",
+ isonsap_string(ndo, addr,(plen + 7) / 8),
+ plen);
return 1 + (plen + 7) / 8;
-
-trunc:
- return -2;
}
static int
decode_labeled_vpn_clnp_prefix(netdissect_options *ndo,
- const u_char *pptr, char *buf, u_int buflen)
+ const u_char *pptr, char *buf, size_t buflen)
{
uint8_t addr[19];
u_int plen;
- ND_TCHECK_1(pptr);
- plen = EXTRACT_U_1(pptr); /* get prefix length */
+ plen = GET_U_1(pptr); /* get prefix length */
if ((24+64) > plen)
return -1;
return -1;
memset(&addr, 0, sizeof(addr));
- ND_TCHECK_LEN(pptr + 12, (plen + 7) / 8);
- memcpy(&addr, pptr + 12, (plen + 7) / 8);
+ GET_CPY_BYTES(&addr, pptr + 12, (plen + 7) / 8);
if (plen % 8) {
- addr[(plen + 7) / 8 - 1] &=
- ((0xff00 >> (plen % 8)) & 0xff);
+ addr[(plen + 7) / 8 - 1] &= ((0xff00 >> (plen % 8)) & 0xff);
}
/* the label may get offsetted by 4 bits so lets shift it right */
- snprintf(buf, buflen, "RD: %s, %s/%d, label:%u %s",
- bgp_vpn_rd_print(ndo, pptr+4),
- isonsap_string(ndo, addr,(plen + 7) / 8),
- plen,
- EXTRACT_BE_U_3(pptr + 1)>>4,
- ((pptr[3]&1)==0) ? "(BOGUS: Bottom of Stack NOT set!)" : "(bottom)" );
+ /* Cannot use GET_ISONSAP_STRING (not packet buffer pointer) */
+ snprintf(buf, buflen, "RD: %s, %s/%u, label:%u %s",
+ bgp_vpn_rd_print(ndo, pptr+4),
+ isonsap_string(ndo, addr,(plen + 7) / 8),
+ plen,
+ GET_BE_U_3(pptr + 1)>>4,
+ ((GET_U_1(pptr + 3) & 1) == 0) ? "(BOGUS: Bottom of Stack NOT set!)" : "(bottom)" );
return 12 + (plen + 7) / 8;
-
-trunc:
- return -2;
}
/*
* both Old speakers that do not support 4 byte AS, and the new speakers that do
* support, exchange AS-Path with the same path-attribute type value 0x02.
*/
-static int
+static u_int
bgp_attr_get_as_size(netdissect_options *ndo,
- uint8_t bgpa_type, const u_char *pptr, int len)
+ uint8_t bgpa_type, const u_char *pptr, u_int len)
{
const u_char *tptr = pptr;
* each.
*/
while (tptr < pptr + len) {
- ND_TCHECK_1(tptr);
-
/*
* If we do not find a valid segment type, our guess might be wrong.
*/
- if (EXTRACT_U_1(tptr) < BGP_AS_SEG_TYPE_MIN || EXTRACT_U_1(tptr) > BGP_AS_SEG_TYPE_MAX) {
+ if (GET_U_1(tptr) < BGP_AS_SEG_TYPE_MIN || GET_U_1(tptr) > BGP_AS_SEG_TYPE_MAX) {
goto trunc;
}
- ND_TCHECK_1(tptr + 1);
- tptr += 2 + EXTRACT_U_1(tptr + 1) * 2;
+ tptr += 2 + GET_U_1(tptr + 1) * 2;
}
/*
return 4;
}
+/*
+ * The only way to know that a BGP UPDATE message is using add path is
+ * by checking if the capability is in the OPEN message which we may have missed.
+ * So this function checks if it is possible that the update could contain add path
+ * and if so it checks that standard BGP doesn't make sense.
+ */
static int
-bgp_attr_print(netdissect_options *ndo,
- u_int atype, const u_char *pptr, u_int len)
+check_add_path(netdissect_options *ndo, const u_char *pptr, u_int length,
+ u_int max_prefix_length)
{
- int i;
- uint16_t af;
- uint8_t safi, snpa, nhlen;
- union { /* copy buffer for bandwidth values */
- float f;
- uint32_t i;
- } bw;
- int advance;
- u_int tlen;
- const u_char *tptr;
- char buf[MAXHOSTNAMELEN + 100];
- int as_size;
-
- tptr = pptr;
- tlen = len;
+ u_int offset, prefix_length;
- switch (atype) {
- case BGPTYPE_ORIGIN:
- if (len != 1)
- ND_PRINT((ndo, "invalid len"));
- else {
- ND_TCHECK_1(tptr);
- ND_PRINT((ndo, "%s", tok2str(bgp_origin_values,
- "Unknown Origin Typecode",
- EXTRACT_U_1(tptr))));
- }
- break;
+ if (length < 5) {
+ return 0;
+ }
/*
- * Process AS4 byte path and AS2 byte path attributes here.
+ * Scan through the NLRI information under the assumpetion that
+ * it doesn't have path IDs.
*/
- case BGPTYPE_AS4_PATH:
- case BGPTYPE_AS_PATH:
- if (len % 2) {
- ND_PRINT((ndo, "invalid len"));
- break;
- }
- if (!len) {
- ND_PRINT((ndo, "empty"));
+ for (offset = 0; offset < length;) {
+ offset += 4;
+ if (!ND_TTEST_1(pptr + offset)) {
+ /* We ran out of captured data; quit scanning. */
break;
}
-
+ prefix_length = GET_U_1(pptr + offset);
/*
- * BGP updates exchanged between New speakers that support 4
- * byte AS, ASs are always encoded in 4 bytes. There is no
- * definitive way to find this, just by the packet's
- * contents. So, check for packet's TLV's sanity assuming
- * 2 bytes first, and it does not pass, assume that ASs are
- * encoded in 4 bytes format and move on.
+ * Add 4 to cover the path id
+ * and check the prefix length isn't greater than 32/128.
*/
- as_size = bgp_attr_get_as_size(ndo, atype, pptr, len);
-
- while (tptr < pptr + len) {
- ND_TCHECK_1(tptr);
- ND_PRINT((ndo, "%s", tok2str(bgp_as_path_segment_open_values,
- "?", EXTRACT_U_1(tptr))));
- ND_TCHECK_1(tptr + 1);
- for (i = 0; i < tptr[1] * as_size; i += as_size) {
- ND_TCHECK_LEN(tptr + 2 + i, as_size);
- ND_PRINT((ndo, "%s ",
- as_printf(ndo, astostr, sizeof(astostr),
- as_size == 2 ?
- EXTRACT_BE_U_2(tptr + i + 2) :
- EXTRACT_BE_U_4(tptr + i + 2))));
- }
- ND_TCHECK_1(tptr);
- ND_PRINT((ndo, "%s", tok2str(bgp_as_path_segment_close_values,
- "?", EXTRACT_U_1(tptr))));
- ND_TCHECK_1(tptr + 1);
- tptr += 2 + EXTRACT_U_1(tptr + 1) * as_size;
- }
- break;
- case BGPTYPE_NEXT_HOP:
- if (len != 4)
- ND_PRINT((ndo, "invalid len"));
- else {
- ND_TCHECK_4(tptr);
- ND_PRINT((ndo, "%s", ipaddr_string(ndo, tptr)));
- }
- break;
- case BGPTYPE_MULTI_EXIT_DISC:
- case BGPTYPE_LOCAL_PREF:
- if (len != 4)
- ND_PRINT((ndo, "invalid len"));
- else {
- ND_TCHECK_4(tptr);
- ND_PRINT((ndo, "%u", EXTRACT_BE_U_4(tptr)));
+ if (prefix_length > max_prefix_length) {
+ return 0;
}
- break;
- case BGPTYPE_ATOMIC_AGGREGATE:
- if (len != 0)
- ND_PRINT((ndo, "invalid len"));
- break;
- case BGPTYPE_AGGREGATOR:
+ /* Add 1 for the prefix_length byte and prefix_length to cover the address */
+ offset += 1 + ((prefix_length + 7) / 8);
+ }
+ /* check we haven't gone past the end of the section */
+ if (offset > length) {
+ return 0;
+ }
- /*
- * Depending on the AS encoded is of 2 bytes or of 4 bytes,
- * the length of this PA can be either 6 bytes or 8 bytes.
- */
- if (len != 6 && len != 8) {
- ND_PRINT((ndo, "invalid len"));
- break;
- }
- ND_TCHECK_LEN(tptr, len);
- if (len == 6) {
- ND_PRINT((ndo, " AS #%s, origin %s",
- as_printf(ndo, astostr, sizeof(astostr), EXTRACT_BE_U_2(tptr)),
- ipaddr_string(ndo, tptr + 2)));
- } else {
- ND_PRINT((ndo, " AS #%s, origin %s",
- as_printf(ndo, astostr, sizeof(astostr),
- EXTRACT_BE_U_4(tptr)), ipaddr_string(ndo, tptr + 4)));
- }
- break;
- case BGPTYPE_AGGREGATOR4:
- if (len != 8) {
- ND_PRINT((ndo, "invalid len"));
- break;
- }
- ND_TCHECK_8(tptr);
- ND_PRINT((ndo, " AS #%s, origin %s",
- as_printf(ndo, astostr, sizeof(astostr), EXTRACT_BE_U_4(tptr)),
- ipaddr_string(ndo, tptr + 4)));
- break;
- case BGPTYPE_COMMUNITIES:
- if (len % 4) {
- ND_PRINT((ndo, "invalid len"));
- break;
- }
- while (tlen>0) {
- uint32_t comm;
- ND_TCHECK_4(tptr);
- comm = EXTRACT_BE_U_4(tptr);
- switch (comm) {
- case BGP_COMMUNITY_NO_EXPORT:
- ND_PRINT((ndo, " NO_EXPORT"));
- break;
- case BGP_COMMUNITY_NO_ADVERT:
- ND_PRINT((ndo, " NO_ADVERTISE"));
- break;
- case BGP_COMMUNITY_NO_EXPORT_SUBCONFED:
- ND_PRINT((ndo, " NO_EXPORT_SUBCONFED"));
- break;
- default:
- ND_PRINT((ndo, "%u:%u%s",
- (comm >> 16) & 0xffff,
- comm & 0xffff,
- (tlen>4) ? ", " : ""));
- break;
- }
- tlen -=4;
- tptr +=4;
- }
- break;
- case BGPTYPE_ORIGINATOR_ID:
- if (len != 4) {
- ND_PRINT((ndo, "invalid len"));
- break;
- }
- ND_TCHECK_4(tptr);
- ND_PRINT((ndo, "%s",ipaddr_string(ndo, tptr)));
- break;
- case BGPTYPE_CLUSTER_LIST:
- if (len % 4) {
- ND_PRINT((ndo, "invalid len"));
+ /* check it's not standard BGP */
+ for (offset = 0; offset < length; ) {
+ if (!ND_TTEST_1(pptr + offset)) {
+ /* We ran out of captured data; quit scanning. */
break;
}
- while (tlen>0) {
- ND_TCHECK_4(tptr);
- ND_PRINT((ndo, "%s%s",
- ipaddr_string(ndo, tptr),
- (tlen>4) ? ", " : ""));
- tlen -=4;
- tptr +=4;
+ prefix_length = GET_U_1(pptr + offset);
+ /*
+ * If the prefix_length is zero (0.0.0.0/0)
+ * and since it's not the only address (length >= 5)
+ * then it is add-path
+ */
+ if (prefix_length < 1 || prefix_length > max_prefix_length) {
+ return 1;
}
- break;
- case BGPTYPE_MP_REACH_NLRI:
- ND_TCHECK_3(tptr);
- af = EXTRACT_BE_U_2(tptr);
- safi = EXTRACT_U_1(tptr + 2);
+ offset += 1 + ((prefix_length + 7) / 8);
+ }
+ if (offset > length) {
+ return 1;
+ }
+
+ /* assume not add-path by default */
+ return 0;
+}
- ND_PRINT((ndo, "\n\t AFI: %s (%u), %sSAFI: %s (%u)",
+static int
+bgp_mp_af_print(netdissect_options *ndo,
+ const u_char *tptr, u_int tlen,
+ uint16_t *afp, uint8_t *safip)
+{
+ uint16_t af;
+ uint8_t safi;
+
+ af = GET_BE_U_2(tptr);
+ *afp = af;
+ safi = GET_U_1(tptr + 2);
+ *safip = safi;
+
+ ND_PRINT("\n\t AFI: %s (%u), %sSAFI: %s (%u)",
tok2str(af_values, "Unknown AFI", af),
af,
(safi>128) ? "vendor specific " : "", /* 128 is meanwhile wellknown */
tok2str(bgp_safi_values, "Unknown SAFI", safi),
- safi));
+ safi);
switch(af<<8 | safi) {
case (AFNUM_INET<<8 | SAFNUM_UNICAST):
break;
default:
ND_TCHECK_LEN(tptr, tlen);
- ND_PRINT((ndo, "\n\t no AFI %u / SAFI %u decoder", af, safi));
+ ND_PRINT("\n\t no AFI %u / SAFI %u decoder", af, safi);
if (ndo->ndo_vflag <= 1)
print_unknown_data(ndo, tptr, "\n\t ", tlen);
- goto done;
- break;
+ return -1;
}
+ return 0;
+trunc:
+ return -2;
+}
- tptr +=3;
-
- ND_TCHECK_1(tptr);
- nhlen = EXTRACT_U_1(tptr);
- tlen = nhlen;
- tptr++;
-
- if (tlen) {
- int nnh = 0;
- ND_PRINT((ndo, "\n\t nexthop: "));
- while (tlen > 0) {
- if (nnh++ > 0) {
- ND_PRINT((ndo, ", " ));
- }
- switch(af<<8 | safi) {
- case (AFNUM_INET<<8 | SAFNUM_UNICAST):
- case (AFNUM_INET<<8 | SAFNUM_MULTICAST):
- case (AFNUM_INET<<8 | SAFNUM_UNIMULTICAST):
- case (AFNUM_INET<<8 | SAFNUM_LABUNICAST):
- case (AFNUM_INET<<8 | SAFNUM_RT_ROUTING_INFO):
- case (AFNUM_INET<<8 | SAFNUM_MULTICAST_VPN):
- case (AFNUM_INET<<8 | SAFNUM_MDT):
- if (tlen < sizeof(struct in_addr)) {
- ND_PRINT((ndo, "invalid len"));
- tlen = 0;
- } else {
- ND_TCHECK_LEN(tptr, sizeof(struct in_addr));
- ND_PRINT((ndo, "%s",ipaddr_string(ndo, tptr)));
- tlen -= sizeof(struct in_addr);
- tptr += sizeof(struct in_addr);
- }
- break;
- case (AFNUM_INET<<8 | SAFNUM_VPNUNICAST):
- case (AFNUM_INET<<8 | SAFNUM_VPNMULTICAST):
- case (AFNUM_INET<<8 | SAFNUM_VPNUNIMULTICAST):
- if (tlen < sizeof(struct in_addr)+BGP_VPN_RD_LEN) {
- ND_PRINT((ndo, "invalid len"));
- tlen = 0;
- } else {
- ND_TCHECK_LEN(tptr,
- sizeof(struct in_addr) + BGP_VPN_RD_LEN);
- ND_PRINT((ndo, "RD: %s, %s",
- bgp_vpn_rd_print(ndo, tptr),
- ipaddr_string(ndo, tptr+BGP_VPN_RD_LEN)));
- tlen -= (sizeof(struct in_addr)+BGP_VPN_RD_LEN);
- tptr += (sizeof(struct in_addr)+BGP_VPN_RD_LEN);
- }
- break;
- case (AFNUM_INET6<<8 | SAFNUM_UNICAST):
- case (AFNUM_INET6<<8 | SAFNUM_MULTICAST):
- case (AFNUM_INET6<<8 | SAFNUM_UNIMULTICAST):
- case (AFNUM_INET6<<8 | SAFNUM_LABUNICAST):
- if (tlen < sizeof(struct in6_addr)) {
- ND_PRINT((ndo, "invalid len"));
- tlen = 0;
- } else {
- ND_TCHECK_LEN(tptr, sizeof(struct in6_addr));
- ND_PRINT((ndo, "%s", ip6addr_string(ndo, tptr)));
- tlen -= sizeof(struct in6_addr);
- tptr += sizeof(struct in6_addr);
- }
- break;
- case (AFNUM_INET6<<8 | SAFNUM_VPNUNICAST):
- case (AFNUM_INET6<<8 | SAFNUM_VPNMULTICAST):
- case (AFNUM_INET6<<8 | SAFNUM_VPNUNIMULTICAST):
- if (tlen < sizeof(struct in6_addr)+BGP_VPN_RD_LEN) {
- ND_PRINT((ndo, "invalid len"));
- tlen = 0;
- } else {
- ND_TCHECK_LEN(tptr,
- sizeof(struct in6_addr) + BGP_VPN_RD_LEN);
- ND_PRINT((ndo, "RD: %s, %s",
- bgp_vpn_rd_print(ndo, tptr),
- ip6addr_string(ndo, tptr+BGP_VPN_RD_LEN)));
- tlen -= (sizeof(struct in6_addr)+BGP_VPN_RD_LEN);
- tptr += (sizeof(struct in6_addr)+BGP_VPN_RD_LEN);
- }
- break;
- case (AFNUM_VPLS<<8 | SAFNUM_VPLS):
- case (AFNUM_L2VPN<<8 | SAFNUM_VPNUNICAST):
- case (AFNUM_L2VPN<<8 | SAFNUM_VPNMULTICAST):
- case (AFNUM_L2VPN<<8 | SAFNUM_VPNUNIMULTICAST):
- if (tlen < sizeof(struct in_addr)) {
- ND_PRINT((ndo, "invalid len"));
- tlen = 0;
- } else {
- ND_TCHECK_LEN(tptr, sizeof(struct in_addr));
- ND_PRINT((ndo, "%s", ipaddr_string(ndo, tptr)));
- tlen -= (sizeof(struct in_addr));
- tptr += (sizeof(struct in_addr));
- }
- break;
- case (AFNUM_NSAP<<8 | SAFNUM_UNICAST):
- case (AFNUM_NSAP<<8 | SAFNUM_MULTICAST):
- case (AFNUM_NSAP<<8 | SAFNUM_UNIMULTICAST):
- ND_TCHECK_LEN(tptr, tlen);
- ND_PRINT((ndo, "%s", isonsap_string(ndo, tptr, tlen)));
- tptr += tlen;
- tlen = 0;
- break;
-
- case (AFNUM_NSAP<<8 | SAFNUM_VPNUNICAST):
- case (AFNUM_NSAP<<8 | SAFNUM_VPNMULTICAST):
- case (AFNUM_NSAP<<8 | SAFNUM_VPNUNIMULTICAST):
- if (tlen < BGP_VPN_RD_LEN+1) {
- ND_PRINT((ndo, "invalid len"));
- tlen = 0;
- } else {
- ND_TCHECK_LEN(tptr, tlen);
- ND_PRINT((ndo, "RD: %s, %s",
- bgp_vpn_rd_print(ndo, tptr),
- isonsap_string(ndo, tptr+BGP_VPN_RD_LEN,tlen-BGP_VPN_RD_LEN)));
- /* rfc986 mapped IPv4 address ? */
- if (EXTRACT_BE_U_4(tptr + BGP_VPN_RD_LEN) == 0x47000601)
- ND_PRINT((ndo, " = %s", ipaddr_string(ndo, tptr+BGP_VPN_RD_LEN+4)));
- /* rfc1888 mapped IPv6 address ? */
- else if (EXTRACT_BE_U_3(tptr + BGP_VPN_RD_LEN) == 0x350000)
- ND_PRINT((ndo, " = %s", ip6addr_string(ndo, tptr+BGP_VPN_RD_LEN+3)));
- tptr += tlen;
- tlen = 0;
- }
- break;
- default:
- ND_TCHECK_LEN(tptr, tlen);
- ND_PRINT((ndo, "no AFI %u/SAFI %u decoder", af, safi));
- if (ndo->ndo_vflag <= 1)
- print_unknown_data(ndo, tptr, "\n\t ", tlen);
- tptr += tlen;
- tlen = 0;
- goto done;
- break;
- }
- }
- }
- ND_PRINT((ndo, ", nh-length: %u", nhlen));
- tptr += tlen;
-
- ND_TCHECK_1(tptr);
- snpa = EXTRACT_U_1(tptr);
- tptr++;
-
- if (snpa) {
- ND_PRINT((ndo, "\n\t %u SNPA", snpa));
- for (/*nothing*/; snpa > 0; snpa--) {
- ND_TCHECK_1(tptr);
- ND_PRINT((ndo, "\n\t %d bytes", EXTRACT_U_1(tptr)));
- tptr += EXTRACT_U_1(tptr) + 1;
- }
- } else {
- ND_PRINT((ndo, ", no SNPA"));
- }
+static int
+bgp_nlri_print(netdissect_options *ndo, uint16_t af, uint8_t safi,
+ const u_char *tptr, u_int len,
+ char *buf, size_t buflen,
+ int add_path4, int add_path6)
+{
+ int advance;
+ u_int path_id = 0;
- while (tptr < pptr + len) {
- switch (af<<8 | safi) {
+ switch (af<<8 | safi) {
case (AFNUM_INET<<8 | SAFNUM_UNICAST):
case (AFNUM_INET<<8 | SAFNUM_MULTICAST):
case (AFNUM_INET<<8 | SAFNUM_UNIMULTICAST):
- advance = decode_prefix4(ndo, tptr, len, buf, sizeof(buf));
+ if (add_path4) {
+ path_id = GET_BE_U_4(tptr);
+ tptr += 4;
+ }
+ advance = decode_prefix4(ndo, tptr, len, buf, buflen);
if (advance == -1)
- ND_PRINT((ndo, "\n\t (illegal prefix length)"));
+ ND_PRINT("\n\t (illegal prefix length)");
else if (advance == -2)
- goto trunc;
- else if (advance == -3)
break; /* bytes left, but not enough */
else
- ND_PRINT((ndo, "\n\t %s", buf));
+ ND_PRINT("\n\t %s", buf);
+ if (add_path4) {
+ ND_PRINT(" Path Id: %u", path_id);
+ advance += 4;
+ }
break;
case (AFNUM_INET<<8 | SAFNUM_LABUNICAST):
- advance = decode_labeled_prefix4(ndo, tptr, len, buf, sizeof(buf));
+ advance = decode_labeled_prefix4(ndo, tptr, len, buf, buflen);
if (advance == -1)
- ND_PRINT((ndo, "\n\t (illegal prefix length)"));
+ ND_PRINT("\n\t (illegal prefix length)");
else if (advance == -2)
goto trunc;
else if (advance == -3)
break; /* bytes left, but not enough */
else
- ND_PRINT((ndo, "\n\t %s", buf));
+ ND_PRINT("\n\t %s", buf);
break;
case (AFNUM_INET<<8 | SAFNUM_VPNUNICAST):
case (AFNUM_INET<<8 | SAFNUM_VPNMULTICAST):
case (AFNUM_INET<<8 | SAFNUM_VPNUNIMULTICAST):
- advance = decode_labeled_vpn_prefix4(ndo, tptr, buf, sizeof(buf));
+ advance = decode_labeled_vpn_prefix4(ndo, tptr, buf, buflen);
if (advance == -1)
- ND_PRINT((ndo, "\n\t (illegal prefix length)"));
- else if (advance == -2)
- goto trunc;
+ ND_PRINT("\n\t (illegal prefix length)");
else
- ND_PRINT((ndo, "\n\t %s", buf));
+ ND_PRINT("\n\t %s", buf);
break;
case (AFNUM_INET<<8 | SAFNUM_RT_ROUTING_INFO):
- advance = decode_rt_routing_info(ndo, tptr, buf, sizeof(buf));
- if (advance == -1)
- ND_PRINT((ndo, "\n\t (illegal prefix length)"));
- else if (advance == -2)
- goto trunc;
- else
- ND_PRINT((ndo, "\n\t %s", buf));
+ advance = decode_rt_routing_info(ndo, tptr);
break;
case (AFNUM_INET<<8 | SAFNUM_MULTICAST_VPN): /* fall through */
case (AFNUM_INET6<<8 | SAFNUM_MULTICAST_VPN):
- advance = decode_multicast_vpn(ndo, tptr, buf, sizeof(buf));
+ advance = decode_multicast_vpn(ndo, tptr, buf, buflen);
if (advance == -1)
- ND_PRINT((ndo, "\n\t (illegal prefix length)"));
+ ND_PRINT("\n\t (illegal prefix length)");
else if (advance == -2)
goto trunc;
else
- ND_PRINT((ndo, "\n\t %s", buf));
+ ND_PRINT("\n\t %s", buf);
break;
case (AFNUM_INET<<8 | SAFNUM_MDT):
- advance = decode_mdt_vpn_nlri(ndo, tptr, buf, sizeof(buf));
+ advance = decode_mdt_vpn_nlri(ndo, tptr, buf, buflen);
if (advance == -1)
- ND_PRINT((ndo, "\n\t (illegal prefix length)"));
+ ND_PRINT("\n\t (illegal prefix length)");
else if (advance == -2)
goto trunc;
else
- ND_PRINT((ndo, "\n\t %s", buf));
+ ND_PRINT("\n\t %s", buf);
break;
case (AFNUM_INET6<<8 | SAFNUM_UNICAST):
case (AFNUM_INET6<<8 | SAFNUM_MULTICAST):
case (AFNUM_INET6<<8 | SAFNUM_UNIMULTICAST):
- advance = decode_prefix6(ndo, tptr, len, buf, sizeof(buf));
+ if (add_path6) {
+ path_id = GET_BE_U_4(tptr);
+ tptr += 4;
+ }
+ advance = decode_prefix6(ndo, tptr, len, buf, buflen);
if (advance == -1)
- ND_PRINT((ndo, "\n\t (illegal prefix length)"));
+ ND_PRINT("\n\t (illegal prefix length)");
else if (advance == -2)
- goto trunc;
- else if (advance == -3)
break; /* bytes left, but not enough */
else
- ND_PRINT((ndo, "\n\t %s", buf));
+ ND_PRINT("\n\t %s", buf);
+ if (add_path6) {
+ ND_PRINT(" Path Id: %u", path_id);
+ advance += 4;
+ }
break;
case (AFNUM_INET6<<8 | SAFNUM_LABUNICAST):
- advance = decode_labeled_prefix6(ndo, tptr, len, buf, sizeof(buf));
+ advance = decode_labeled_prefix6(ndo, tptr, len, buf, buflen);
if (advance == -1)
- ND_PRINT((ndo, "\n\t (illegal prefix length)"));
+ ND_PRINT("\n\t (illegal prefix length)");
else if (advance == -2)
goto trunc;
else if (advance == -3)
break; /* bytes left, but not enough */
else
- ND_PRINT((ndo, "\n\t %s", buf));
+ ND_PRINT("\n\t %s", buf);
break;
case (AFNUM_INET6<<8 | SAFNUM_VPNUNICAST):
case (AFNUM_INET6<<8 | SAFNUM_VPNMULTICAST):
case (AFNUM_INET6<<8 | SAFNUM_VPNUNIMULTICAST):
- advance = decode_labeled_vpn_prefix6(ndo, tptr, buf, sizeof(buf));
+ advance = decode_labeled_vpn_prefix6(ndo, tptr, buf, buflen);
if (advance == -1)
- ND_PRINT((ndo, "\n\t (illegal prefix length)"));
- else if (advance == -2)
- goto trunc;
+ ND_PRINT("\n\t (illegal prefix length)");
else
- ND_PRINT((ndo, "\n\t %s", buf));
+ ND_PRINT("\n\t %s", buf);
break;
case (AFNUM_VPLS<<8 | SAFNUM_VPLS):
case (AFNUM_L2VPN<<8 | SAFNUM_VPNUNICAST):
case (AFNUM_L2VPN<<8 | SAFNUM_VPNMULTICAST):
case (AFNUM_L2VPN<<8 | SAFNUM_VPNUNIMULTICAST):
- advance = decode_labeled_vpn_l2(ndo, tptr, buf, sizeof(buf));
+ advance = decode_labeled_vpn_l2(ndo, tptr, buf, buflen);
if (advance == -1)
- ND_PRINT((ndo, "\n\t (illegal length)"));
+ ND_PRINT("\n\t (illegal length)");
else if (advance == -2)
goto trunc;
else
- ND_PRINT((ndo, "\n\t %s", buf));
+ ND_PRINT("\n\t %s", buf);
break;
case (AFNUM_NSAP<<8 | SAFNUM_UNICAST):
case (AFNUM_NSAP<<8 | SAFNUM_MULTICAST):
case (AFNUM_NSAP<<8 | SAFNUM_UNIMULTICAST):
- advance = decode_clnp_prefix(ndo, tptr, buf, sizeof(buf));
+ advance = decode_clnp_prefix(ndo, tptr, buf, buflen);
if (advance == -1)
- ND_PRINT((ndo, "\n\t (illegal prefix length)"));
- else if (advance == -2)
- goto trunc;
+ ND_PRINT("\n\t (illegal prefix length)");
else
- ND_PRINT((ndo, "\n\t %s", buf));
+ ND_PRINT("\n\t %s", buf);
break;
case (AFNUM_NSAP<<8 | SAFNUM_VPNUNICAST):
case (AFNUM_NSAP<<8 | SAFNUM_VPNMULTICAST):
case (AFNUM_NSAP<<8 | SAFNUM_VPNUNIMULTICAST):
- advance = decode_labeled_vpn_clnp_prefix(ndo, tptr, buf, sizeof(buf));
+ advance = decode_labeled_vpn_clnp_prefix(ndo, tptr, buf, buflen);
if (advance == -1)
- ND_PRINT((ndo, "\n\t (illegal prefix length)"));
- else if (advance == -2)
- goto trunc;
+ ND_PRINT("\n\t (illegal prefix length)");
else
- ND_PRINT((ndo, "\n\t %s", buf));
+ ND_PRINT("\n\t %s", buf);
break;
default:
- ND_TCHECK_LEN(tptr, tlen);
- ND_PRINT((ndo, "\n\t no AFI %u / SAFI %u decoder", af, safi));
- if (ndo->ndo_vflag <= 1)
- print_unknown_data(ndo, tptr, "\n\t ", tlen);
- advance = 0;
- tptr = pptr + len;
+ /*
+ * This should not happen, we should have been protected
+ * by bgp_mp_af_print()'s return value.
+ */
+ ND_PRINT("\n\t ERROR: no AFI %u / SAFI %u decoder", af, safi);
+ advance = -4;
break;
+ }
+ return advance;
+trunc: /* we rely on the caller to recognize -2 return value */
+ return -2;
+}
+
+static int
+bgp_attr_print(netdissect_options *ndo,
+ uint8_t atype, const u_char *pptr, u_int len,
+ const unsigned attr_set_level)
+{
+ /* allocate space for the largest possible string */
+ char astostr[AS_STR_SIZE];
+ u_int i;
+ uint16_t af;
+ uint8_t safi, snpa, nhlen;
+ int advance;
+ u_int tlen;
+ const u_char *tptr;
+ char buf[MAXHOSTNAMELEN + 100];
+ u_int as_size;
+ int add_path4, add_path6;
+ int ret;
+
+ tptr = pptr;
+ tlen = len;
+
+ switch (atype) {
+ case BGPTYPE_ORIGIN:
+ if (len != 1)
+ ND_PRINT("invalid len");
+ else {
+ ND_PRINT("%s", tok2str(bgp_origin_values,
+ "Unknown Origin Typecode",
+ GET_U_1(tptr)));
+ }
+ break;
+
+ /*
+ * Process AS4 byte path and AS2 byte path attributes here.
+ */
+ case BGPTYPE_AS4_PATH:
+ case BGPTYPE_AS_PATH:
+ if (len % 2) {
+ ND_PRINT("invalid len");
+ break;
+ }
+ if (!len) {
+ ND_PRINT("empty");
+ break;
+ }
+
+ /*
+ * BGP updates exchanged between New speakers that support 4
+ * byte AS, ASs are always encoded in 4 bytes. There is no
+ * definitive way to find this, just by the packet's
+ * contents. So, check for packet's TLV's sanity assuming
+ * 2 bytes first, and it does not pass, assume that ASs are
+ * encoded in 4 bytes format and move on.
+ */
+ as_size = bgp_attr_get_as_size(ndo, atype, pptr, len);
+
+ while (tptr < pptr + len) {
+ ND_PRINT("%s", tok2str(bgp_as_path_segment_open_values,
+ "?", GET_U_1(tptr)));
+ for (i = 0; i < GET_U_1(tptr + 1) * as_size; i += as_size) {
+ ND_TCHECK_LEN(tptr + 2 + i, as_size);
+ ND_PRINT("%s ",
+ as_printf(ndo, astostr, sizeof(astostr),
+ as_size == 2 ?
+ GET_BE_U_2(tptr + i + 2) :
+ GET_BE_U_4(tptr + i + 2)));
+ }
+ ND_PRINT("%s", tok2str(bgp_as_path_segment_close_values,
+ "?", GET_U_1(tptr)));
+ tptr += 2 + GET_U_1(tptr + 1) * as_size;
+ }
+ break;
+ case BGPTYPE_NEXT_HOP:
+ if (len != 4)
+ ND_PRINT("invalid len");
+ else {
+ ND_PRINT("%s", GET_IPADDR_STRING(tptr));
+ }
+ break;
+ case BGPTYPE_MULTI_EXIT_DISC:
+ case BGPTYPE_LOCAL_PREF:
+ if (len != 4)
+ ND_PRINT("invalid len");
+ else {
+ ND_PRINT("%u", GET_BE_U_4(tptr));
+ }
+ break;
+ case BGPTYPE_ATOMIC_AGGREGATE:
+ if (len != 0)
+ ND_PRINT("invalid len");
+ break;
+ case BGPTYPE_AGGREGATOR:
+
+ /*
+ * Depending on the AS encoded is of 2 bytes or of 4 bytes,
+ * the length of this PA can be either 6 bytes or 8 bytes.
+ */
+ if (len != 6 && len != 8) {
+ ND_PRINT("invalid len");
+ break;
+ }
+ ND_TCHECK_LEN(tptr, len);
+ if (len == 6) {
+ ND_PRINT(" AS #%s, origin %s",
+ as_printf(ndo, astostr, sizeof(astostr), GET_BE_U_2(tptr)),
+ GET_IPADDR_STRING(tptr + 2));
+ } else {
+ ND_PRINT(" AS #%s, origin %s",
+ as_printf(ndo, astostr, sizeof(astostr),
+ GET_BE_U_4(tptr)), GET_IPADDR_STRING(tptr + 4));
+ }
+ break;
+ case BGPTYPE_AGGREGATOR4:
+ if (len != 8) {
+ ND_PRINT("invalid len");
+ break;
+ }
+ ND_PRINT(" AS #%s, origin %s",
+ as_printf(ndo, astostr, sizeof(astostr), GET_BE_U_4(tptr)),
+ GET_IPADDR_STRING(tptr + 4));
+ break;
+ case BGPTYPE_COMMUNITIES:
+ if (len % 4) {
+ ND_PRINT("invalid len");
+ break;
+ }
+ while (tlen != 0) {
+ uint32_t comm;
+ ND_TCHECK_4(tptr);
+ if (tlen < 4)
+ goto trunc;
+ comm = GET_BE_U_4(tptr);
+ switch (comm) {
+ case BGP_COMMUNITY_NO_EXPORT:
+ ND_PRINT(" NO_EXPORT");
+ break;
+ case BGP_COMMUNITY_NO_ADVERT:
+ ND_PRINT(" NO_ADVERTISE");
+ break;
+ case BGP_COMMUNITY_NO_EXPORT_SUBCONFED:
+ ND_PRINT(" NO_EXPORT_SUBCONFED");
+ break;
+ default:
+ ND_PRINT("%u:%u%s",
+ (comm >> 16) & 0xffff,
+ comm & 0xffff,
+ (tlen>4) ? ", " : "");
+ break;
+ }
+ tlen -=4;
+ tptr +=4;
+ }
+ break;
+ case BGPTYPE_ORIGINATOR_ID:
+ if (len != 4) {
+ ND_PRINT("invalid len");
+ break;
+ }
+ ND_PRINT("%s",GET_IPADDR_STRING(tptr));
+ break;
+ case BGPTYPE_CLUSTER_LIST:
+ if (len % 4) {
+ ND_PRINT("invalid len");
+ break;
+ }
+ while (tlen != 0) {
+ if (tlen < 4)
+ goto trunc;
+ ND_PRINT("%s%s",
+ GET_IPADDR_STRING(tptr),
+ (tlen>4) ? ", " : "");
+ tlen -=4;
+ tptr +=4;
+ }
+ break;
+ case BGPTYPE_MP_REACH_NLRI:
+ ND_TCHECK_3(tptr);
+ if (tlen < 3)
+ goto trunc;
+ ret = bgp_mp_af_print(ndo, tptr, tlen, &af, &safi);
+ if (ret == -2)
+ goto trunc;
+ if (ret < 0)
+ break;
+
+ tptr += 3;
+ tlen -= 3;
+
+ ND_TCHECK_1(tptr);
+ if (tlen < 1)
+ goto trunc;
+ nhlen = GET_U_1(tptr);
+ tptr++;
+ tlen--;
+
+ if (nhlen) {
+ u_int nnh = 0;
+ uint8_t tnhlen = nhlen;
+ if (tlen < tnhlen)
+ goto trunc;
+ ND_PRINT("\n\t nexthop: ");
+ while (tnhlen != 0) {
+ if (nnh++ > 0) {
+ ND_PRINT(", " );
+ }
+ switch(af<<8 | safi) {
+ case (AFNUM_INET<<8 | SAFNUM_UNICAST):
+ case (AFNUM_INET<<8 | SAFNUM_MULTICAST):
+ case (AFNUM_INET<<8 | SAFNUM_UNIMULTICAST):
+ case (AFNUM_INET<<8 | SAFNUM_LABUNICAST):
+ case (AFNUM_INET<<8 | SAFNUM_RT_ROUTING_INFO):
+ case (AFNUM_INET<<8 | SAFNUM_MULTICAST_VPN):
+ case (AFNUM_INET<<8 | SAFNUM_MDT):
+ if (tnhlen < sizeof(nd_ipv4)) {
+ ND_PRINT("invalid len");
+ tptr += tnhlen;
+ tlen -= tnhlen;
+ tnhlen = 0;
+ } else {
+ ND_PRINT("%s",GET_IPADDR_STRING(tptr));
+ tptr += sizeof(nd_ipv4);
+ tnhlen -= sizeof(nd_ipv4);
+ tlen -= sizeof(nd_ipv4);
+ }
+ break;
+ case (AFNUM_INET<<8 | SAFNUM_VPNUNICAST):
+ case (AFNUM_INET<<8 | SAFNUM_VPNMULTICAST):
+ case (AFNUM_INET<<8 | SAFNUM_VPNUNIMULTICAST):
+ if (tnhlen < sizeof(nd_ipv4)+BGP_VPN_RD_LEN) {
+ ND_PRINT("invalid len");
+ tptr += tnhlen;
+ tlen -= tnhlen;
+ tnhlen = 0;
+ } else {
+ ND_PRINT("RD: %s, %s",
+ bgp_vpn_rd_print(ndo, tptr),
+ GET_IPADDR_STRING(tptr+BGP_VPN_RD_LEN));
+ tptr += (sizeof(nd_ipv4)+BGP_VPN_RD_LEN);
+ tlen -= (sizeof(nd_ipv4)+BGP_VPN_RD_LEN);
+ tnhlen -= (sizeof(nd_ipv4)+BGP_VPN_RD_LEN);
+ }
+ break;
+ case (AFNUM_INET6<<8 | SAFNUM_UNICAST):
+ case (AFNUM_INET6<<8 | SAFNUM_MULTICAST):
+ case (AFNUM_INET6<<8 | SAFNUM_UNIMULTICAST):
+ case (AFNUM_INET6<<8 | SAFNUM_LABUNICAST):
+ if (tnhlen < sizeof(nd_ipv6)) {
+ ND_PRINT("invalid len");
+ tptr += tnhlen;
+ tlen -= tnhlen;
+ tnhlen = 0;
+ } else {
+ ND_PRINT("%s", GET_IP6ADDR_STRING(tptr));
+ tptr += sizeof(nd_ipv6);
+ tlen -= sizeof(nd_ipv6);
+ tnhlen -= sizeof(nd_ipv6);
+ }
+ break;
+ case (AFNUM_INET6<<8 | SAFNUM_VPNUNICAST):
+ case (AFNUM_INET6<<8 | SAFNUM_VPNMULTICAST):
+ case (AFNUM_INET6<<8 | SAFNUM_VPNUNIMULTICAST):
+ if (tnhlen < sizeof(nd_ipv6)+BGP_VPN_RD_LEN) {
+ ND_PRINT("invalid len");
+ tptr += tnhlen;
+ tlen -= tnhlen;
+ tnhlen = 0;
+ } else {
+ ND_PRINT("RD: %s, %s",
+ bgp_vpn_rd_print(ndo, tptr),
+ GET_IP6ADDR_STRING(tptr+BGP_VPN_RD_LEN));
+ tptr += (sizeof(nd_ipv6)+BGP_VPN_RD_LEN);
+ tlen -= (sizeof(nd_ipv6)+BGP_VPN_RD_LEN);
+ tnhlen -= (sizeof(nd_ipv6)+BGP_VPN_RD_LEN);
+ }
+ break;
+ case (AFNUM_VPLS<<8 | SAFNUM_VPLS):
+ case (AFNUM_L2VPN<<8 | SAFNUM_VPNUNICAST):
+ case (AFNUM_L2VPN<<8 | SAFNUM_VPNMULTICAST):
+ case (AFNUM_L2VPN<<8 | SAFNUM_VPNUNIMULTICAST):
+ if (tnhlen < sizeof(nd_ipv4)) {
+ ND_PRINT("invalid len");
+ tptr += tnhlen;
+ tlen -= tnhlen;
+ tnhlen = 0;
+ } else {
+ ND_PRINT("%s", GET_IPADDR_STRING(tptr));
+ tptr += (sizeof(nd_ipv4));
+ tlen -= (sizeof(nd_ipv4));
+ tnhlen -= (sizeof(nd_ipv4));
+ }
+ break;
+ case (AFNUM_NSAP<<8 | SAFNUM_UNICAST):
+ case (AFNUM_NSAP<<8 | SAFNUM_MULTICAST):
+ case (AFNUM_NSAP<<8 | SAFNUM_UNIMULTICAST):
+ ND_PRINT("%s", GET_ISONSAP_STRING(tptr, tnhlen));
+ tptr += tnhlen;
+ tlen -= tnhlen;
+ tnhlen = 0;
+ break;
+
+ case (AFNUM_NSAP<<8 | SAFNUM_VPNUNICAST):
+ case (AFNUM_NSAP<<8 | SAFNUM_VPNMULTICAST):
+ case (AFNUM_NSAP<<8 | SAFNUM_VPNUNIMULTICAST):
+ if (tnhlen < BGP_VPN_RD_LEN+1) {
+ ND_PRINT("invalid len");
+ tptr += tnhlen;
+ tlen -= tnhlen;
+ tnhlen = 0;
+ } else {
+ ND_TCHECK_LEN(tptr, tnhlen);
+ ND_PRINT("RD: %s, %s",
+ bgp_vpn_rd_print(ndo, tptr),
+ GET_ISONSAP_STRING(tptr+BGP_VPN_RD_LEN,tnhlen-BGP_VPN_RD_LEN));
+ /* rfc986 mapped IPv4 address ? */
+ if (GET_BE_U_4(tptr + BGP_VPN_RD_LEN) == 0x47000601)
+ ND_PRINT(" = %s", GET_IPADDR_STRING(tptr+BGP_VPN_RD_LEN+4));
+ /* rfc1888 mapped IPv6 address ? */
+ else if (GET_BE_U_3(tptr + BGP_VPN_RD_LEN) == 0x350000)
+ ND_PRINT(" = %s", GET_IP6ADDR_STRING(tptr+BGP_VPN_RD_LEN+3));
+ tptr += tnhlen;
+ tlen -= tnhlen;
+ tnhlen = 0;
+ }
+ break;
+ default:
+ /*
+ * bgp_mp_af_print() should have saved us from
+ * an unsupported AFI/SAFI.
+ */
+ ND_PRINT("ERROR: no AFI %u/SAFI %u nexthop decoder", af, safi);
+ tptr += tnhlen;
+ tlen -= tnhlen;
+ tnhlen = 0;
+ goto done;
+ break;
+ }
}
+ }
+ ND_PRINT(", nh-length: %u", nhlen);
+
+ /* As per RFC 2858; this is reserved in RFC 4760 */
+ if (tlen < 1)
+ goto trunc;
+ snpa = GET_U_1(tptr);
+ tptr++;
+ tlen--;
+
+ if (snpa) {
+ ND_PRINT("\n\t %u SNPA", snpa);
+ for (/*nothing*/; snpa != 0; snpa--) {
+ uint8_t snpalen;
+ if (tlen < 1)
+ goto trunc;
+ snpalen = GET_U_1(tptr);
+ ND_PRINT("\n\t %u bytes", snpalen);
+ tptr++;
+ tlen--;
+ if (tlen < snpalen)
+ goto trunc;
+ ND_TCHECK_LEN(tptr, snpalen);
+ tptr += snpalen;
+ tlen -= snpalen;
+ }
+ } else {
+ ND_PRINT(", no SNPA");
+ }
+
+ add_path4 = check_add_path(ndo, tptr, (len-ND_BYTES_BETWEEN(tptr, pptr)), 32);
+ add_path6 = check_add_path(ndo, tptr, (len-ND_BYTES_BETWEEN(tptr, pptr)), 128);
+
+ while (tptr < pptr + len) {
+ advance = bgp_nlri_print(ndo, af, safi, tptr, len, buf, sizeof(buf),
+ add_path4, add_path6);
+ if (advance == -2)
+ goto trunc;
if (advance < 0)
break;
tptr += advance;
}
- done:
break;
case BGPTYPE_MP_UNREACH_NLRI:
ND_TCHECK_LEN(tptr, BGP_MP_NLRI_MINSIZE);
- af = EXTRACT_BE_U_2(tptr);
- safi = EXTRACT_U_1(tptr + 2);
-
- ND_PRINT((ndo, "\n\t AFI: %s (%u), %sSAFI: %s (%u)",
- tok2str(af_values, "Unknown AFI", af),
- af,
- (safi>128) ? "vendor specific " : "", /* 128 is meanwhile wellknown */
- tok2str(bgp_safi_values, "Unknown SAFI", safi),
- safi));
+ ret = bgp_mp_af_print(ndo, tptr, tlen, &af, &safi);
+ if (ret == -2)
+ goto trunc;
+ if (ret < 0)
+ break;
if (len == BGP_MP_NLRI_MINSIZE)
- ND_PRINT((ndo, "\n\t End-of-Rib Marker (empty NLRI)"));
+ ND_PRINT("\n\t End-of-Rib Marker (empty NLRI)");
tptr += 3;
+ add_path4 = check_add_path(ndo, tptr, (len-ND_BYTES_BETWEEN(tptr, pptr)), 32);
+ add_path6 = check_add_path(ndo, tptr, (len-ND_BYTES_BETWEEN(tptr, pptr)), 128);
+
while (tptr < pptr + len) {
- switch (af<<8 | safi) {
- case (AFNUM_INET<<8 | SAFNUM_UNICAST):
- case (AFNUM_INET<<8 | SAFNUM_MULTICAST):
- case (AFNUM_INET<<8 | SAFNUM_UNIMULTICAST):
- advance = decode_prefix4(ndo, tptr, len, buf, sizeof(buf));
- if (advance == -1)
- ND_PRINT((ndo, "\n\t (illegal prefix length)"));
- else if (advance == -2)
- goto trunc;
- else if (advance == -3)
- break; /* bytes left, but not enough */
- else
- ND_PRINT((ndo, "\n\t %s", buf));
- break;
- case (AFNUM_INET<<8 | SAFNUM_LABUNICAST):
- advance = decode_labeled_prefix4(ndo, tptr, len, buf, sizeof(buf));
- if (advance == -1)
- ND_PRINT((ndo, "\n\t (illegal prefix length)"));
- else if (advance == -2)
- goto trunc;
- else if (advance == -3)
- break; /* bytes left, but not enough */
- else
- ND_PRINT((ndo, "\n\t %s", buf));
- break;
- case (AFNUM_INET<<8 | SAFNUM_VPNUNICAST):
- case (AFNUM_INET<<8 | SAFNUM_VPNMULTICAST):
- case (AFNUM_INET<<8 | SAFNUM_VPNUNIMULTICAST):
- advance = decode_labeled_vpn_prefix4(ndo, tptr, buf, sizeof(buf));
- if (advance == -1)
- ND_PRINT((ndo, "\n\t (illegal prefix length)"));
- else if (advance == -2)
- goto trunc;
- else
- ND_PRINT((ndo, "\n\t %s", buf));
- break;
- case (AFNUM_INET6<<8 | SAFNUM_UNICAST):
- case (AFNUM_INET6<<8 | SAFNUM_MULTICAST):
- case (AFNUM_INET6<<8 | SAFNUM_UNIMULTICAST):
- advance = decode_prefix6(ndo, tptr, len, buf, sizeof(buf));
- if (advance == -1)
- ND_PRINT((ndo, "\n\t (illegal prefix length)"));
- else if (advance == -2)
- goto trunc;
- else if (advance == -3)
- break; /* bytes left, but not enough */
- else
- ND_PRINT((ndo, "\n\t %s", buf));
- break;
- case (AFNUM_INET6<<8 | SAFNUM_LABUNICAST):
- advance = decode_labeled_prefix6(ndo, tptr, len, buf, sizeof(buf));
- if (advance == -1)
- ND_PRINT((ndo, "\n\t (illegal prefix length)"));
- else if (advance == -2)
- goto trunc;
- else if (advance == -3)
- break; /* bytes left, but not enough */
- else
- ND_PRINT((ndo, "\n\t %s", buf));
- break;
- case (AFNUM_INET6<<8 | SAFNUM_VPNUNICAST):
- case (AFNUM_INET6<<8 | SAFNUM_VPNMULTICAST):
- case (AFNUM_INET6<<8 | SAFNUM_VPNUNIMULTICAST):
- advance = decode_labeled_vpn_prefix6(ndo, tptr, buf, sizeof(buf));
- if (advance == -1)
- ND_PRINT((ndo, "\n\t (illegal prefix length)"));
- else if (advance == -2)
- goto trunc;
- else
- ND_PRINT((ndo, "\n\t %s", buf));
- break;
- case (AFNUM_VPLS<<8 | SAFNUM_VPLS):
- case (AFNUM_L2VPN<<8 | SAFNUM_VPNUNICAST):
- case (AFNUM_L2VPN<<8 | SAFNUM_VPNMULTICAST):
- case (AFNUM_L2VPN<<8 | SAFNUM_VPNUNIMULTICAST):
- advance = decode_labeled_vpn_l2(ndo, tptr, buf, sizeof(buf));
- if (advance == -1)
- ND_PRINT((ndo, "\n\t (illegal length)"));
- else if (advance == -2)
- goto trunc;
- else
- ND_PRINT((ndo, "\n\t %s", buf));
- break;
- case (AFNUM_NSAP<<8 | SAFNUM_UNICAST):
- case (AFNUM_NSAP<<8 | SAFNUM_MULTICAST):
- case (AFNUM_NSAP<<8 | SAFNUM_UNIMULTICAST):
- advance = decode_clnp_prefix(ndo, tptr, buf, sizeof(buf));
- if (advance == -1)
- ND_PRINT((ndo, "\n\t (illegal prefix length)"));
- else if (advance == -2)
- goto trunc;
- else
- ND_PRINT((ndo, "\n\t %s", buf));
- break;
- case (AFNUM_NSAP<<8 | SAFNUM_VPNUNICAST):
- case (AFNUM_NSAP<<8 | SAFNUM_VPNMULTICAST):
- case (AFNUM_NSAP<<8 | SAFNUM_VPNUNIMULTICAST):
- advance = decode_labeled_vpn_clnp_prefix(ndo, tptr, buf, sizeof(buf));
- if (advance == -1)
- ND_PRINT((ndo, "\n\t (illegal prefix length)"));
- else if (advance == -2)
- goto trunc;
- else
- ND_PRINT((ndo, "\n\t %s", buf));
- break;
- case (AFNUM_INET<<8 | SAFNUM_MDT):
- advance = decode_mdt_vpn_nlri(ndo, tptr, buf, sizeof(buf));
- if (advance == -1)
- ND_PRINT((ndo, "\n\t (illegal prefix length)"));
- else if (advance == -2)
- goto trunc;
- else
- ND_PRINT((ndo, "\n\t %s", buf));
- break;
- case (AFNUM_INET<<8 | SAFNUM_MULTICAST_VPN): /* fall through */
- case (AFNUM_INET6<<8 | SAFNUM_MULTICAST_VPN):
- advance = decode_multicast_vpn(ndo, tptr, buf, sizeof(buf));
- if (advance == -1)
- ND_PRINT((ndo, "\n\t (illegal prefix length)"));
- else if (advance == -2)
- goto trunc;
- else
- ND_PRINT((ndo, "\n\t %s", buf));
- break;
- default:
- ND_TCHECK_LEN(tptr - 3, tlen);
- ND_PRINT((ndo, "no AFI %u / SAFI %u decoder", af, safi));
- if (ndo->ndo_vflag <= 1)
- print_unknown_data(ndo, tptr-3, "\n\t ", tlen);
- advance = 0;
- tptr = pptr + len;
- break;
- }
+ advance = bgp_nlri_print(ndo, af, safi, tptr, len, buf, sizeof(buf),
+ add_path4, add_path6);
+ if (advance == -2)
+ goto trunc;
if (advance < 0)
break;
tptr += advance;
break;
case BGPTYPE_EXTD_COMMUNITIES:
if (len % 8) {
- ND_PRINT((ndo, "invalid len"));
+ ND_PRINT("invalid len");
break;
}
- while (tlen>0) {
+ while (tlen != 0) {
uint16_t extd_comm;
ND_TCHECK_2(tptr);
- extd_comm=EXTRACT_BE_U_2(tptr);
+ if (tlen < 2)
+ goto trunc;
+ extd_comm=GET_BE_U_2(tptr);
- ND_PRINT((ndo, "\n\t %s (0x%04x), Flags [%s]",
+ ND_PRINT("\n\t %s (0x%04x), Flags [%s]",
tok2str(bgp_extd_comm_subtype_values,
"unknown extd community typecode",
extd_comm),
extd_comm,
- bittok2str(bgp_extd_comm_flag_values, "none", extd_comm)));
-
- ND_TCHECK_6(tptr + 2);
- switch(extd_comm) {
- case BGP_EXT_COM_RT_0:
- case BGP_EXT_COM_RO_0:
- case BGP_EXT_COM_L2VPN_RT_0:
- ND_PRINT((ndo, ": %u:%u (= %s)",
- EXTRACT_BE_U_2(tptr + 2),
- EXTRACT_BE_U_4(tptr + 4),
- ipaddr_string(ndo, tptr+4)));
- break;
- case BGP_EXT_COM_RT_1:
- case BGP_EXT_COM_RO_1:
- case BGP_EXT_COM_L2VPN_RT_1:
- case BGP_EXT_COM_VRF_RT_IMP:
- ND_PRINT((ndo, ": %s:%u",
- ipaddr_string(ndo, tptr+2),
- EXTRACT_BE_U_2(tptr + 6)));
- break;
- case BGP_EXT_COM_RT_2:
- case BGP_EXT_COM_RO_2:
- ND_PRINT((ndo, ": %s:%u",
- as_printf(ndo, astostr, sizeof(astostr),
- EXTRACT_BE_U_4(tptr + 2)), EXTRACT_BE_U_2(tptr + 6)));
- break;
- case BGP_EXT_COM_LINKBAND:
- bw.i = EXTRACT_BE_U_4(tptr + 2);
- ND_PRINT((ndo, ": bandwidth: %.3f Mbps",
- bw.f*8/1000000));
- break;
- case BGP_EXT_COM_VPN_ORIGIN:
- case BGP_EXT_COM_VPN_ORIGIN2:
- case BGP_EXT_COM_VPN_ORIGIN3:
- case BGP_EXT_COM_VPN_ORIGIN4:
- case BGP_EXT_COM_OSPF_RID:
- case BGP_EXT_COM_OSPF_RID2:
- ND_PRINT((ndo, "%s", ipaddr_string(ndo, tptr+2)));
- break;
- case BGP_EXT_COM_OSPF_RTYPE:
- case BGP_EXT_COM_OSPF_RTYPE2:
- ND_PRINT((ndo, ": area:%s, router-type:%s, metric-type:%s%s",
- ipaddr_string(ndo, tptr+2),
- tok2str(bgp_extd_comm_ospf_rtype_values,
- "unknown (0x%02x)",
- EXTRACT_U_1((tptr + 6))),
- (EXTRACT_U_1(tptr + 7) & BGP_OSPF_RTYPE_METRIC_TYPE) ? "E2" : "",
- ((EXTRACT_U_1(tptr + 6) == BGP_OSPF_RTYPE_EXT) || (EXTRACT_U_1(tptr + 6) == BGP_OSPF_RTYPE_NSSA)) ? "E1" : ""));
- break;
- case BGP_EXT_COM_L2INFO:
- ND_PRINT((ndo, ": %s Control Flags [0x%02x]:MTU %u",
- tok2str(l2vpn_encaps_values,
- "unknown encaps",
- EXTRACT_U_1((tptr + 2))),
- EXTRACT_U_1((tptr + 3)),
- EXTRACT_BE_U_2(tptr + 4)));
- break;
- case BGP_EXT_COM_SOURCE_AS:
- ND_PRINT((ndo, ": AS %u", EXTRACT_BE_U_2(tptr + 2)));
- break;
- default:
- ND_TCHECK_8(tptr);
- print_unknown_data(ndo, tptr, "\n\t ", 8);
- break;
- }
+ bittok2str(bgp_extd_comm_flag_values, "none", extd_comm));
+
+ ND_TCHECK_8(tptr);
+ if (tlen < 8)
+ goto trunc;
+ ND_PRINT(": ");
+ bgp_extended_community_print(ndo, tptr);
tlen -= 8;
tptr += 8;
}
uint8_t tunnel_type, flags;
ND_TCHECK_5(tptr);
- flags = EXTRACT_U_1(tptr);
- tunnel_type = EXTRACT_U_1(tptr + 1);
- tlen = len;
+ if (tlen < 5)
+ goto trunc;
+ flags = GET_U_1(tptr);
+ tunnel_type = GET_U_1(tptr + 1);
- ND_PRINT((ndo, "\n\t Tunnel-type %s (%u), Flags [%s], MPLS Label %u",
+ ND_PRINT("\n\t Tunnel-type %s (%u), Flags [%s], MPLS Label %u",
tok2str(bgp_pmsi_tunnel_values, "Unknown", tunnel_type),
tunnel_type,
bittok2str(bgp_pmsi_flag_values, "none", flags),
- EXTRACT_BE_U_3(tptr + 2)>>4));
+ GET_BE_U_3(tptr + 2)>>4);
tptr +=5;
tlen -= 5;
switch (tunnel_type) {
case BGP_PMSI_TUNNEL_PIM_SM: /* fall through */
case BGP_PMSI_TUNNEL_PIM_BIDIR:
- ND_TCHECK_8(tptr);
- ND_PRINT((ndo, "\n\t Sender %s, P-Group %s",
- ipaddr_string(ndo, tptr),
- ipaddr_string(ndo, tptr+4)));
+ ND_PRINT("\n\t Sender %s, P-Group %s",
+ GET_IPADDR_STRING(tptr),
+ GET_IPADDR_STRING(tptr+4));
break;
case BGP_PMSI_TUNNEL_PIM_SSM:
- ND_TCHECK_8(tptr);
- ND_PRINT((ndo, "\n\t Root-Node %s, P-Group %s",
- ipaddr_string(ndo, tptr),
- ipaddr_string(ndo, tptr+4)));
+ ND_PRINT("\n\t Root-Node %s, P-Group %s",
+ GET_IPADDR_STRING(tptr),
+ GET_IPADDR_STRING(tptr+4));
break;
case BGP_PMSI_TUNNEL_INGRESS:
- ND_TCHECK_4(tptr);
- ND_PRINT((ndo, "\n\t Tunnel-Endpoint %s",
- ipaddr_string(ndo, tptr)));
+ ND_PRINT("\n\t Tunnel-Endpoint %s",
+ GET_IPADDR_STRING(tptr));
break;
case BGP_PMSI_TUNNEL_LDP_P2MP: /* fall through */
case BGP_PMSI_TUNNEL_LDP_MP2MP:
- ND_TCHECK_8(tptr);
- ND_PRINT((ndo, "\n\t Root-Node %s, LSP-ID 0x%08x",
- ipaddr_string(ndo, tptr),
- EXTRACT_BE_U_4(tptr + 4)));
+ ND_PRINT("\n\t Root-Node %s, LSP-ID 0x%08x",
+ GET_IPADDR_STRING(tptr),
+ GET_BE_U_4(tptr + 4));
break;
case BGP_PMSI_TUNNEL_RSVP_P2MP:
- ND_TCHECK_8(tptr);
- ND_PRINT((ndo, "\n\t Extended-Tunnel-ID %s, P2MP-ID 0x%08x",
- ipaddr_string(ndo, tptr),
- EXTRACT_BE_U_4(tptr + 4)));
+ ND_PRINT("\n\t Extended-Tunnel-ID %s, P2MP-ID 0x%08x",
+ GET_IPADDR_STRING(tptr),
+ GET_BE_U_4(tptr + 4));
break;
default:
if (ndo->ndo_vflag <= 1) {
uint8_t type;
uint16_t length;
- tlen = len;
-
while (tlen >= 3) {
-
- ND_TCHECK_3(tptr);
-
- type = EXTRACT_U_1(tptr);
- length = EXTRACT_BE_U_2(tptr + 1);
+ type = GET_U_1(tptr);
+ length = GET_BE_U_2(tptr + 1);
tptr += 3;
tlen -= 3;
- ND_PRINT((ndo, "\n\t %s TLV (%u), length %u",
+ ND_PRINT("\n\t %s TLV (%u), length %u",
tok2str(bgp_aigp_values, "Unknown", type),
- type, length));
+ type, length);
if (length < 3)
goto trunc;
/*
* Check if we can read the TLV data.
*/
- ND_TCHECK_LEN(tptr + 3, length);
+ if (tlen < length)
+ goto trunc;
switch (type) {
case BGP_AIGP_TLV:
if (length < 8)
goto trunc;
- ND_PRINT((ndo, ", metric %" PRIu64,
- EXTRACT_BE_U_8(tptr)));
+ ND_PRINT(", metric %" PRIu64,
+ GET_BE_U_8(tptr));
break;
default:
ND_TCHECK_4(tptr);
if (len < 4)
goto trunc;
- ND_PRINT((ndo, "\n\t Origin AS: %s",
- as_printf(ndo, astostr, sizeof(astostr), EXTRACT_BE_U_4(tptr))));
+ ND_PRINT("\n\t Origin AS: %s",
+ as_printf(ndo, astostr, sizeof(astostr), GET_BE_U_4(tptr)));
tptr += 4;
len -= 4;
u_int aflags, alenlen, alen;
ND_TCHECK_2(tptr);
- if (len < 2)
- goto trunc;
- aflags = EXTRACT_U_1(tptr);
- atype = EXTRACT_U_1(tptr + 1);
+ if (len < 2) {
+ ND_PRINT(" [path attr too short]");
+ tptr += len;
+ break;
+ }
+ aflags = GET_U_1(tptr);
+ atype = GET_U_1(tptr + 1);
tptr += 2;
len -= 2;
alenlen = bgp_attr_lenlen(aflags, tptr);
ND_TCHECK_LEN(tptr, alenlen);
- if (len < alenlen)
- goto trunc;
+ if (len < alenlen) {
+ ND_PRINT(" [path attr too short]");
+ tptr += len;
+ break;
+ }
alen = bgp_attr_len(aflags, tptr);
tptr += alenlen;
len -= alenlen;
- ND_PRINT((ndo, "\n\t %s (%u), length: %u",
+ ND_PRINT("\n\t %s (%u), length: %u",
tok2str(bgp_attr_values,
"Unknown Attribute", atype),
atype,
- alen));
+ alen);
if (aflags) {
- ND_PRINT((ndo, ", Flags [%s%s%s%s",
+ ND_PRINT(", Flags [%s%s%s%s",
aflags & 0x80 ? "O" : "",
aflags & 0x40 ? "T" : "",
aflags & 0x20 ? "P" : "",
- aflags & 0x10 ? "E" : ""));
+ aflags & 0x10 ? "E" : "");
if (aflags & 0xf)
- ND_PRINT((ndo, "+%x", aflags & 0xf));
- ND_PRINT((ndo, "]: "));
+ ND_PRINT("+%x", aflags & 0xf);
+ ND_PRINT("]");
}
- /* FIXME check for recursion */
- if (!bgp_attr_print(ndo, atype, tptr, alen))
- return 0;
+ ND_PRINT(": ");
+ if (len < alen) {
+ ND_PRINT(" [path attr too short]");
+ tptr += len;
+ break;
+ }
+ /*
+ * The protocol encoding per se allows ATTR_SET to be nested
+ * as many times as the message can accommodate. This printer
+ * used to be able to recurse into ATTR_SET contents until the
+ * stack exhaustion, but now there is a limit on that (if live
+ * protocol exchange goes that many levels deep, something is
+ * probably wrong anyway). Feel free to refine this value if
+ * you can find the spec with respective normative text.
+ */
+ if (attr_set_level == 10)
+ ND_PRINT("(too many nested levels, not recursing)");
+ else if (!bgp_attr_print(ndo, atype, tptr, alen, attr_set_level + 1))
+ return 0;
tptr += alen;
len -= alen;
}
case BGPTYPE_LARGE_COMMUNITY:
if (len == 0 || len % 12) {
- ND_PRINT((ndo, "invalid len"));
+ ND_PRINT("invalid len");
break;
}
- ND_PRINT((ndo, "\n\t "));
- while (len > 0) {
- ND_TCHECK_LEN(tptr, 12);
- ND_PRINT((ndo, "%u:%u:%u%s",
- EXTRACT_BE_U_4(tptr),
- EXTRACT_BE_U_4(tptr + 4),
- EXTRACT_BE_U_4(tptr + 8),
- (len > 12) ? ", " : ""));
+ ND_PRINT("\n\t ");
+ while (len != 0) {
+ ND_PRINT("%u:%u:%u%s",
+ GET_BE_U_4(tptr),
+ GET_BE_U_4(tptr + 4),
+ GET_BE_U_4(tptr + 8),
+ (len > 12) ? ", " : "");
tptr += 12;
+ /*
+ * len will always be a multiple of 12, as per the above,
+ * so this will never underflow.
+ */
len -= 12;
}
break;
default:
ND_TCHECK_LEN(pptr, len);
- ND_PRINT((ndo, "\n\t no Attribute %u decoder", atype)); /* we have no decoder for the attribute */
+ ND_PRINT("\n\t no Attribute %u decoder", atype); /* we have no decoder for the attribute */
if (ndo->ndo_vflag <= 1)
print_unknown_data(ndo, pptr, "\n\t ", len);
break;
}
+done:
if (ndo->ndo_vflag > 1 && len) { /* omit zero length attributes*/
ND_TCHECK_LEN(pptr, len);
print_unknown_data(ndo, pptr, "\n\t ", len);
bgp_capabilities_print(netdissect_options *ndo,
const u_char *opt, u_int caps_len)
{
+ /* allocate space for the largest possible string */
+ char astostr[AS_STR_SIZE];
u_int cap_type, cap_len, tcap_len, cap_offset;
u_int i = 0;
while (i < caps_len) {
ND_TCHECK_LEN(opt + i, BGP_CAP_HEADER_SIZE);
- cap_type=EXTRACT_U_1(opt + i);
- cap_len=EXTRACT_U_1(opt + i + 1);
- tcap_len=cap_len;
- ND_PRINT((ndo, "\n\t %s (%u), length: %u",
+ cap_type=GET_U_1(opt + i);
+ cap_len=GET_U_1(opt + i + 1);
+ ND_PRINT("\n\t %s (%u), length: %u",
tok2str(bgp_capcode_values, "Unknown", cap_type),
cap_type,
- cap_len));
+ cap_len);
ND_TCHECK_LEN(opt + 2 + i, cap_len);
switch (cap_type) {
case BGP_CAPCODE_MP:
- ND_PRINT((ndo, "\n\t\tAFI %s (%u), SAFI %s (%u)",
- tok2str(af_values, "Unknown", EXTRACT_BE_U_2(opt + i + 2)),
- EXTRACT_BE_U_2(opt + i + 2),
- tok2str(bgp_safi_values, "Unknown", EXTRACT_U_1(opt + i + 5)),
- EXTRACT_U_1(opt + i + 5)));
+ /* AFI (16 bits), Reserved (8 bits), SAFI (8 bits) */
+ if (cap_len < 4) {
+ ND_PRINT(" (too short, < 4)");
+ return;
+ }
+ ND_PRINT("\n\t\tAFI %s (%u), SAFI %s (%u)",
+ tok2str(af_values, "Unknown", GET_BE_U_2(opt + i + 2)),
+ GET_BE_U_2(opt + i + 2),
+ tok2str(bgp_safi_values, "Unknown", GET_U_1(opt + i + 5)),
+ GET_U_1(opt + i + 5));
+ break;
+ case BGP_CAPCODE_ML:
+ cap_offset = 2;
+ tcap_len = cap_len;
+ while (tcap_len >= 4) {
+ ND_PRINT( "\n\t\tAFI %s (%u), SAFI %s (%u), Count: %u",
+ tok2str(af_values, "Unknown",
+ GET_BE_U_2(opt + i + cap_offset)),
+ GET_BE_U_2(opt + i + cap_offset),
+ tok2str(bgp_safi_values, "Unknown",
+ GET_U_1(opt + i + cap_offset + 2)),
+ GET_U_1(opt + i + cap_offset + 2),
+ GET_U_1(opt + i + cap_offset + 3));
+ tcap_len -= 4;
+ cap_offset += 4;
+ }
break;
case BGP_CAPCODE_RESTART:
- ND_PRINT((ndo, "\n\t\tRestart Flags: [%s], Restart Time %us",
- ((EXTRACT_U_1(opt + i + 2))&0x80) ? "R" : "none",
- EXTRACT_BE_U_2(opt + i + 2)&0xfff));
+ /* Restart Flags (4 bits), Restart Time in seconds (12 bits) */
+ if (cap_len < 2) {
+ ND_PRINT(" (too short, < 2)");
+ return;
+ }
+ tcap_len=cap_len;
+ ND_PRINT("\n\t\tRestart Flags: [%s], Restart Time %us",
+ ((GET_U_1(opt + i + 2))&0x80) ? "R" : "none",
+ GET_BE_U_2(opt + i + 2)&0xfff);
tcap_len-=2;
cap_offset=4;
while(tcap_len>=4) {
- ND_PRINT((ndo, "\n\t\t AFI %s (%u), SAFI %s (%u), Forwarding state preserved: %s",
+ ND_PRINT("\n\t\t AFI %s (%u), SAFI %s (%u), Forwarding state preserved: %s",
tok2str(af_values,"Unknown",
- EXTRACT_BE_U_2(opt + i + cap_offset)),
- EXTRACT_BE_U_2(opt + i + cap_offset),
+ GET_BE_U_2(opt + i + cap_offset)),
+ GET_BE_U_2(opt + i + cap_offset),
tok2str(bgp_safi_values,"Unknown",
- EXTRACT_U_1(opt + i + cap_offset + 2)),
- EXTRACT_U_1(opt + (i + cap_offset + 2)),
- ((EXTRACT_U_1(opt + (i + cap_offset + 3)))&0x80) ? "yes" : "no" ));
+ GET_U_1(opt + i + cap_offset + 2)),
+ GET_U_1(opt + (i + cap_offset + 2)),
+ ((GET_U_1(opt + (i + cap_offset + 3)))&0x80) ? "yes" : "no" );
tcap_len -= 4;
cap_offset += 4;
}
break;
case BGP_CAPCODE_RR:
+ case BGP_CAPCODE_LLGR:
case BGP_CAPCODE_RR_CISCO:
break;
case BGP_CAPCODE_AS_NEW:
-
/*
* Extract the 4 byte AS number encoded.
*/
- if (cap_len == 4) {
- ND_PRINT((ndo, "\n\t\t 4 Byte AS %s",
- as_printf(ndo, astostr, sizeof(astostr),
- EXTRACT_BE_U_4(opt + i + 2))));
+ if (cap_len < 4) {
+ ND_PRINT(" (too short, < 4)");
+ return;
}
+ ND_PRINT("\n\t\t 4 Byte AS %s",
+ as_printf(ndo, astostr, sizeof(astostr),
+ GET_BE_U_4(opt + i + 2)));
break;
case BGP_CAPCODE_ADD_PATH:
- cap_offset=2;
- if (tcap_len == 0) {
- ND_PRINT((ndo, " (bogus)")); /* length */
+ if (cap_len == 0) {
+ ND_PRINT(" (bogus)"); /* length */
break;
}
- while (tcap_len > 0) {
+ tcap_len=cap_len;
+ cap_offset=2;
+ while (tcap_len != 0) {
if (tcap_len < 4) {
- ND_PRINT((ndo, "\n\t\t(invalid)"));
+ nd_print_invalid(ndo);
break;
}
- ND_PRINT((ndo, "\n\t\tAFI %s (%u), SAFI %s (%u), Send/Receive: %s",
- tok2str(af_values,"Unknown",EXTRACT_BE_U_2(opt + i + cap_offset)),
- EXTRACT_BE_U_2(opt + i + cap_offset),
- tok2str(bgp_safi_values,"Unknown",EXTRACT_U_1(opt + i + cap_offset + 2)),
- EXTRACT_U_1(opt + (i + cap_offset + 2)),
- tok2str(bgp_add_path_recvsend,"Bogus (0x%02x)",EXTRACT_U_1(opt + i + cap_offset + 3))
- ));
+ ND_PRINT("\n\t\tAFI %s (%u), SAFI %s (%u), Send/Receive: %s",
+ tok2str(af_values,"Unknown",GET_BE_U_2(opt + i + cap_offset)),
+ GET_BE_U_2(opt + i + cap_offset),
+ tok2str(bgp_safi_values,"Unknown",GET_U_1(opt + i + cap_offset + 2)),
+ GET_U_1(opt + (i + cap_offset + 2)),
+ tok2str(bgp_add_path_recvsend,"Bogus (0x%02x)",GET_U_1(opt + i + cap_offset + 3))
+ );
tcap_len -= 4;
cap_offset += 4;
}
break;
default:
- ND_PRINT((ndo, "\n\t\tno decoder for Capability %u",
- cap_type));
+ ND_PRINT("\n\t\tno decoder for Capability %u",
+ cap_type);
if (ndo->ndo_vflag <= 1)
print_unknown_data(ndo, opt + i + 2, "\n\t\t",
cap_len);
break;
}
- if (ndo->ndo_vflag > 1 && cap_len > 0) {
+ if (ndo->ndo_vflag > 1 && cap_len != 0) {
print_unknown_data(ndo, opt + i + 2, "\n\t\t", cap_len);
}
i += BGP_CAP_HEADER_SIZE + cap_len;
return;
trunc:
- ND_PRINT((ndo, "[|BGP]"));
+ nd_print_trunc(ndo);
}
static void
bgp_open_print(netdissect_options *ndo,
const u_char *dat, u_int length)
{
+ /* allocate space for the largest possible string */
+ char astostr[AS_STR_SIZE];
const struct bgp_open *bgp_open_header;
u_int optslen;
const struct bgp_opt *bgpopt;
bgp_open_header = (const struct bgp_open *)dat;
- ND_PRINT((ndo, "\n\t Version %u, ",
- EXTRACT_U_1(bgp_open_header->bgpo_version)));
- ND_PRINT((ndo, "my AS %s, ",
- as_printf(ndo, astostr, sizeof(astostr), EXTRACT_BE_U_2(bgp_open_header->bgpo_myas))));
- ND_PRINT((ndo, "Holdtime %us, ",
- EXTRACT_BE_U_2(bgp_open_header->bgpo_holdtime)));
- ND_PRINT((ndo, "ID %s", ipaddr_string(ndo, &bgp_open_header->bgpo_id)));
- optslen = EXTRACT_U_1(bgp_open_header->bgpo_optlen);
- ND_PRINT((ndo, "\n\t Optional parameters, length: %u", optslen));
+ ND_PRINT("\n\t Version %u, ",
+ GET_U_1(bgp_open_header->bgpo_version));
+ ND_PRINT("my AS %s, ",
+ as_printf(ndo, astostr, sizeof(astostr), GET_BE_U_2(bgp_open_header->bgpo_myas)));
+ ND_PRINT("Holdtime %us, ",
+ GET_BE_U_2(bgp_open_header->bgpo_holdtime));
+ ND_PRINT("ID %s", GET_IPADDR_STRING(bgp_open_header->bgpo_id));
+ optslen = GET_U_1(bgp_open_header->bgpo_optlen);
+ ND_PRINT("\n\t Optional parameters, length: %u", optslen);
opt = dat + BGP_OPEN_SIZE;
length -= BGP_OPEN_SIZE;
if (length < BGP_OPT_SIZE + i)
goto trunc;
bgpopt = (const struct bgp_opt *)(opt + i);
- opt_type = EXTRACT_U_1(bgpopt->bgpopt_type);
- opt_len = EXTRACT_U_1(bgpopt->bgpopt_len);
+ opt_type = GET_U_1(bgpopt->bgpopt_type);
+ opt_len = GET_U_1(bgpopt->bgpopt_len);
if (BGP_OPT_SIZE + i + opt_len > optslen) {
- ND_PRINT((ndo, "\n\t Option %u, length: %u, goes past the end of the options",
- opt_type, opt_len));
+ ND_PRINT("\n\t Option %u, length: %u, goes past the end of the options",
+ opt_type, opt_len);
break;
}
- ND_PRINT((ndo, "\n\t Option %s (%u), length: %u",
+ ND_PRINT("\n\t Option %s (%u), length: %u",
tok2str(bgp_opt_values,"Unknown",opt_type),
opt_type,
- opt_len));
+ opt_len);
/* now let's decode the options we know*/
switch(opt_type) {
case BGP_OPT_AUTH:
default:
- ND_PRINT((ndo, "\n\t no decoder for option %u",
- opt_type));
+ ND_PRINT("\n\t no decoder for option %u",
+ opt_type);
break;
}
i += BGP_OPT_SIZE + opt_len;
}
return;
trunc:
- ND_PRINT((ndo, "[|BGP]"));
+ nd_print_trunc(ndo);
}
static void
bgp_update_print(netdissect_options *ndo,
- const u_char *dat, int length)
+ const u_char *dat, u_int length)
{
- const struct bgp *bgp_header;
const u_char *p;
- int withdrawn_routes_len;
- int len;
+ u_int withdrawn_routes_len;
+ char buf[MAXHOSTNAMELEN + 100];
+ int wpfx;
+ u_int len;
int i;
+ int add_path;
+ u_int path_id = 0;
ND_TCHECK_LEN(dat, BGP_SIZE);
if (length < BGP_SIZE)
goto trunc;
- bgp_header = (const struct bgp *)dat;
p = dat + BGP_SIZE;
length -= BGP_SIZE;
ND_TCHECK_2(p);
if (length < 2)
goto trunc;
- withdrawn_routes_len = EXTRACT_BE_U_2(p);
+ withdrawn_routes_len = GET_BE_U_2(p);
p += 2;
length -= 2;
- if (withdrawn_routes_len) {
+ if (withdrawn_routes_len > 1) {
/*
* Without keeping state from the original NLRI message,
* it's not possible to tell if this a v4 or v6 route,
ND_TCHECK_LEN(p, withdrawn_routes_len);
if (length < withdrawn_routes_len)
goto trunc;
- ND_PRINT((ndo, "\n\t Withdrawn routes: %d bytes", withdrawn_routes_len));
+ ND_PRINT("\n\t Withdrawn routes:");
+ add_path = check_add_path(ndo, p, withdrawn_routes_len, 32);
+ while (withdrawn_routes_len != 0) {
+ if (add_path) {
+ if (withdrawn_routes_len < 4) {
+ p += withdrawn_routes_len;
+ length -= withdrawn_routes_len;
+ break;
+ }
+ path_id = GET_BE_U_4(p);
+ p += 4;
+ length -= 4;
+ withdrawn_routes_len -= 4;
+ }
+ wpfx = decode_prefix4(ndo, p, withdrawn_routes_len, buf, sizeof(buf));
+ if (wpfx == -1) {
+ ND_PRINT("\n\t (illegal prefix length)");
+ break;
+ } else if (wpfx == -2)
+ goto trunc; /* bytes left, but not enough */
+ else {
+ ND_PRINT("\n\t %s", buf);
+ if (add_path) {
+ ND_PRINT(" Path Id: %u", path_id);
+ }
+ p += wpfx;
+ length -= wpfx;
+ withdrawn_routes_len -= wpfx;
+ }
+ }
+ } else {
+ ND_TCHECK_LEN(p, withdrawn_routes_len);
+ if (length < withdrawn_routes_len)
+ goto trunc;
p += withdrawn_routes_len;
length -= withdrawn_routes_len;
}
ND_TCHECK_2(p);
if (length < 2)
goto trunc;
- len = EXTRACT_BE_U_2(p);
+ len = GET_BE_U_2(p);
p += 2;
length -= 2;
if (withdrawn_routes_len == 0 && len == 0 && length == 0) {
/* No withdrawn routes, no path attributes, no NLRI */
- ND_PRINT((ndo, "\n\t End-of-Rib Marker (empty NLRI)"));
+ ND_PRINT("\n\t End-of-Rib Marker (empty NLRI)");
return;
}
if (len) {
+ /* Make sure the path attributes don't go past the end of the packet */
+ if (length < len)
+ goto trunc;
/* do something more useful!*/
while (len) {
- int aflags, atype, alenlen, alen;
+ uint8_t aflags, atype, alenlen;
+ uint16_t alen;
ND_TCHECK_2(p);
- if (len < 2)
- goto trunc;
if (length < 2)
goto trunc;
- aflags = EXTRACT_U_1(p);
- atype = EXTRACT_U_1(p + 1);
+ if (len < 2) {
+ ND_PRINT("\n\t [path attrs too short]");
+ p += len;
+ length -= len;
+ break;
+ }
+ aflags = GET_U_1(p);
+ atype = GET_U_1(p + 1);
p += 2;
len -= 2;
length -= 2;
alenlen = bgp_attr_lenlen(aflags, p);
ND_TCHECK_LEN(p, alenlen);
- if (len < alenlen)
- goto trunc;
if (length < alenlen)
goto trunc;
+ if (len < alenlen) {
+ ND_PRINT("\n\t [path attrs too short]");
+ p += len;
+ length -= len;
+ break;
+ }
alen = bgp_attr_len(aflags, p);
p += alenlen;
len -= alenlen;
length -= alenlen;
- ND_PRINT((ndo, "\n\t %s (%u), length: %u",
+ ND_PRINT("\n\t %s (%u), length: %u",
tok2str(bgp_attr_values, "Unknown Attribute", atype),
atype,
- alen));
+ alen);
if (aflags) {
- ND_PRINT((ndo, ", Flags [%s%s%s%s",
+ ND_PRINT(", Flags [%s%s%s%s",
aflags & 0x80 ? "O" : "",
aflags & 0x40 ? "T" : "",
aflags & 0x20 ? "P" : "",
- aflags & 0x10 ? "E" : ""));
+ aflags & 0x10 ? "E" : "");
if (aflags & 0xf)
- ND_PRINT((ndo, "+%x", aflags & 0xf));
- ND_PRINT((ndo, "]: "));
+ ND_PRINT("+%x", aflags & 0xf);
+ ND_PRINT("]: ");
+ }
+ if (len < alen) {
+ ND_PRINT(" [path attrs too short]");
+ p += len;
+ length -= len;
+ break;
}
- if (len < alen)
- goto trunc;
if (length < alen)
goto trunc;
- if (!bgp_attr_print(ndo, atype, p, alen))
+ if (!bgp_attr_print(ndo, atype, p, alen, 0))
goto trunc;
p += alen;
len -= alen;
}
if (length) {
- /*
- * XXX - what if they're using the "Advertisement of
- * Multiple Paths in BGP" feature:
- *
- * https://datatracker.ietf.org/doc/draft-ietf-idr-add-paths/
- *
- * http://tools.ietf.org/html/draft-ietf-idr-add-paths-06
- */
- ND_PRINT((ndo, "\n\t Updated routes:"));
- while (length) {
- char buf[MAXHOSTNAMELEN + 100];
+ add_path = check_add_path(ndo, p, length, 32);
+ ND_PRINT("\n\t Updated routes:");
+ while (length != 0) {
+ if (add_path) {
+ ND_TCHECK_4(p);
+ if (length < 4)
+ goto trunc;
+ path_id = GET_BE_U_4(p);
+ p += 4;
+ length -= 4;
+ }
i = decode_prefix4(ndo, p, length, buf, sizeof(buf));
if (i == -1) {
- ND_PRINT((ndo, "\n\t (illegal prefix length)"));
+ ND_PRINT("\n\t (illegal prefix length)");
break;
} else if (i == -2)
- goto trunc;
- else if (i == -3)
goto trunc; /* bytes left, but not enough */
else {
- ND_PRINT((ndo, "\n\t %s", buf));
+ ND_PRINT("\n\t %s", buf);
+ if (add_path) {
+ ND_PRINT(" Path Id: %u", path_id);
+ }
p += i;
length -= i;
}
}
return;
trunc:
- ND_PRINT((ndo, "[|BGP]"));
+ nd_print_trunc(ndo);
}
static void
bgp_notification_print(netdissect_options *ndo,
- const u_char *dat, int length)
+ const u_char *dat, u_int length)
{
const struct bgp_notification *bgp_notification_header;
const u_char *tptr;
uint8_t bgpn_major, bgpn_minor;
- uint8_t shutdown_comm_length;
- uint8_t remainder_offset;
ND_TCHECK_LEN(dat, BGP_NOTIFICATION_SIZE);
if (length<BGP_NOTIFICATION_SIZE)
return;
bgp_notification_header = (const struct bgp_notification *)dat;
- bgpn_major = EXTRACT_U_1(bgp_notification_header->bgpn_major);
- bgpn_minor = EXTRACT_U_1(bgp_notification_header->bgpn_minor);
+ bgpn_major = GET_U_1(bgp_notification_header->bgpn_major);
+ bgpn_minor = GET_U_1(bgp_notification_header->bgpn_minor);
- ND_PRINT((ndo, ", %s (%u)",
+ ND_PRINT(", %s (%u)",
tok2str(bgp_notify_major_values, "Unknown Error",
bgpn_major),
- bgpn_major));
+ bgpn_major);
switch (bgpn_major) {
case BGP_NOTIFY_MAJOR_MSG:
- ND_PRINT((ndo, ", subcode %s (%u)",
+ ND_PRINT(", subcode %s (%u)",
tok2str(bgp_notify_minor_msg_values, "Unknown",
bgpn_minor),
- bgpn_minor));
+ bgpn_minor);
break;
case BGP_NOTIFY_MAJOR_OPEN:
- ND_PRINT((ndo, ", subcode %s (%u)",
+ ND_PRINT(", subcode %s (%u)",
tok2str(bgp_notify_minor_open_values, "Unknown",
bgpn_minor),
- bgpn_minor));
+ bgpn_minor);
break;
case BGP_NOTIFY_MAJOR_UPDATE:
- ND_PRINT((ndo, ", subcode %s (%u)",
+ ND_PRINT(", subcode %s (%u)",
tok2str(bgp_notify_minor_update_values, "Unknown",
bgpn_minor),
- bgpn_minor));
+ bgpn_minor);
break;
case BGP_NOTIFY_MAJOR_FSM:
- ND_PRINT((ndo, " subcode %s (%u)",
+ ND_PRINT(" subcode %s (%u)",
tok2str(bgp_notify_minor_fsm_values, "Unknown",
bgpn_minor),
- bgpn_minor));
+ bgpn_minor);
break;
case BGP_NOTIFY_MAJOR_CAP:
- ND_PRINT((ndo, " subcode %s (%u)",
+ ND_PRINT(" subcode %s (%u)",
tok2str(bgp_notify_minor_cap_values, "Unknown",
bgpn_minor),
- bgpn_minor));
+ bgpn_minor);
break;
case BGP_NOTIFY_MAJOR_CEASE:
- ND_PRINT((ndo, ", subcode %s (%u)",
+ ND_PRINT(", subcode %s (%u)",
tok2str(bgp_notify_minor_cease_values, "Unknown",
bgpn_minor),
- bgpn_minor));
+ bgpn_minor);
- /* draft-ietf-idr-cease-subcode-02 mentions optionally 7 bytes
+ /* RFC 4486 mentions optionally 7 bytes
* for the maxprefix subtype, which may contain AFI, SAFI and MAXPREFIXES
*/
if(bgpn_minor == BGP_NOTIFY_MINOR_CEASE_MAXPRFX && length >= BGP_NOTIFICATION_SIZE + 7) {
tptr = dat + BGP_NOTIFICATION_SIZE;
- ND_TCHECK_7(tptr);
- ND_PRINT((ndo, ", AFI %s (%u), SAFI %s (%u), Max Prefixes: %u",
- tok2str(af_values, "Unknown", EXTRACT_BE_U_2(tptr)),
- EXTRACT_BE_U_2(tptr),
- tok2str(bgp_safi_values, "Unknown", EXTRACT_U_1((tptr + 2))),
- EXTRACT_U_1((tptr + 2)),
- EXTRACT_BE_U_4(tptr + 3)));
+ ND_PRINT(", AFI %s (%u), SAFI %s (%u), Max Prefixes: %u",
+ tok2str(af_values, "Unknown", GET_BE_U_2(tptr)),
+ GET_BE_U_2(tptr),
+ tok2str(bgp_safi_values, "Unknown", GET_U_1((tptr + 2))),
+ GET_U_1((tptr + 2)),
+ GET_BE_U_4(tptr + 3));
}
/*
- * draft-ietf-idr-shutdown describes a method to send a communication
+ * RFC 9003 describes a method to send a communication
* intended for human consumption regarding the Administrative Shutdown
*/
if ((bgpn_minor == BGP_NOTIFY_MINOR_CEASE_SHUT ||
bgpn_minor == BGP_NOTIFY_MINOR_CEASE_RESET) &&
length >= BGP_NOTIFICATION_SIZE + 1) {
tptr = dat + BGP_NOTIFICATION_SIZE;
- ND_TCHECK_1(tptr);
- shutdown_comm_length = EXTRACT_U_1(tptr);
- remainder_offset = 0;
+ uint8_t shutdown_comm_length = GET_U_1(tptr);
+ uint8_t remainder_offset = 0;
/* garbage, hexdump it all */
- if (shutdown_comm_length > BGP_NOTIFY_MINOR_CEASE_ADMIN_SHUTDOWN_LEN ||
- shutdown_comm_length > length - (BGP_NOTIFICATION_SIZE + 1)) {
- ND_PRINT((ndo, ", invalid Shutdown Communication length"));
+ if (shutdown_comm_length > length - (BGP_NOTIFICATION_SIZE + 1)) {
+ ND_PRINT(", invalid Shutdown Communication length");
}
else if (shutdown_comm_length == 0) {
- ND_PRINT((ndo, ", empty Shutdown Communication"));
+ ND_PRINT(", empty Shutdown Communication");
remainder_offset += 1;
}
/* a proper shutdown communication */
else {
- ND_TCHECK_LEN(tptr + 1, shutdown_comm_length);
- ND_PRINT((ndo, ", Shutdown Communication (length: %u): \"", shutdown_comm_length));
- (void)fn_printn(ndo, tptr+1, shutdown_comm_length, NULL);
- ND_PRINT((ndo, "\""));
+ ND_PRINT(", Shutdown Communication (length: %u): \"", shutdown_comm_length);
+ (void)nd_printn(ndo, tptr+1, shutdown_comm_length, NULL);
+ ND_PRINT("\"");
remainder_offset += shutdown_comm_length + 1;
}
/* if there is trailing data, hexdump it */
if(length - (remainder_offset + BGP_NOTIFICATION_SIZE) > 0) {
- ND_PRINT((ndo, ", Data: (length: %u)", length - (remainder_offset + BGP_NOTIFICATION_SIZE)));
+ ND_PRINT(", Data: (length: %u)", length - (remainder_offset + BGP_NOTIFICATION_SIZE));
hex_print(ndo, "\n\t\t", tptr + remainder_offset, length - (remainder_offset + BGP_NOTIFICATION_SIZE));
}
}
return;
trunc:
- ND_PRINT((ndo, "[|BGP]"));
+ nd_print_trunc(ndo);
}
static void
bgp_route_refresh_print(netdissect_options *ndo,
- const u_char *pptr, int len)
+ const u_char *pptr, u_int len)
{
const struct bgp_route_refresh *bgp_route_refresh_header;
bgp_route_refresh_header = (const struct bgp_route_refresh *)pptr;
- ND_PRINT((ndo, "\n\t AFI %s (%u), SAFI %s (%u)",
+ ND_PRINT("\n\t AFI %s (%u), SAFI %s (%u)",
tok2str(af_values,"Unknown",
- EXTRACT_BE_U_2(bgp_route_refresh_header->afi)),
- EXTRACT_BE_U_2(bgp_route_refresh_header->afi),
+ GET_BE_U_2(bgp_route_refresh_header->afi)),
+ GET_BE_U_2(bgp_route_refresh_header->afi),
tok2str(bgp_safi_values,"Unknown",
- EXTRACT_U_1(bgp_route_refresh_header->safi)),
- EXTRACT_U_1(bgp_route_refresh_header->safi)));
+ GET_U_1(bgp_route_refresh_header->safi)),
+ GET_U_1(bgp_route_refresh_header->safi));
if (ndo->ndo_vflag > 1) {
ND_TCHECK_LEN(pptr, len);
return;
trunc:
- ND_PRINT((ndo, "[|BGP]"));
+ nd_print_trunc(ndo);
}
static int
bgp_pdu_print(netdissect_options *ndo,
- const u_char *dat, u_int length)
+ const u_char *dat, u_int length)
{
const struct bgp *bgp_header;
uint8_t bgp_type;
ND_TCHECK_LEN(dat, BGP_SIZE);
bgp_header = (const struct bgp *)dat;
- bgp_type = EXTRACT_U_1(bgp_header->bgp_type);
+ bgp_type = GET_U_1(bgp_header->bgp_type);
- ND_PRINT((ndo, "\n\t%s Message (%u), length: %u",
+ ND_PRINT("\n\t%s Message (%u), length: %u",
tok2str(bgp_msg_values, "Unknown", bgp_type),
bgp_type,
- length));
+ length);
switch (bgp_type) {
case BGP_OPEN:
default:
/* we have no decoder for the BGP message */
ND_TCHECK_LEN(dat, length);
- ND_PRINT((ndo, "\n\t no Message %u decoder", bgp_type));
+ ND_PRINT("\n\t no Message %u decoder", bgp_type);
print_unknown_data(ndo, dat, "\n\t ", length);
break;
}
return 1;
trunc:
- ND_PRINT((ndo, "[|BGP]"));
+ nd_print_trunc(ndo);
return 0;
}
void
bgp_print(netdissect_options *ndo,
- const u_char *dat, int length)
+ const u_char *dat, u_int length _U_)
{
const u_char *p;
- const u_char *ep;
+ const u_char *ep = ndo->ndo_snapend;
const u_char *start;
const u_char marker[] = {
0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
const struct bgp *bgp_header;
uint16_t hlen;
- ep = dat + length;
- if (ndo->ndo_snapend < dat + length)
- ep = ndo->ndo_snapend;
-
- ND_PRINT((ndo, ": BGP"));
+ ndo->ndo_protocol = "bgp";
+ ND_PRINT(": BGP");
if (ndo->ndo_vflag < 1) /* lets be less chatty */
return;
while (p < ep) {
if (!ND_TTEST_1(p))
break;
- if (EXTRACT_U_1(p) != 0xff) {
+ if (GET_U_1(p) != 0xff) {
p++;
continue;
}
bgp_header = (const struct bgp *)p;
if (start != p)
- ND_PRINT((ndo, " [|BGP]"));
+ nd_print_trunc(ndo);
- hlen = EXTRACT_BE_U_2(bgp_header->bgp_len);
+ hlen = GET_BE_U_2(bgp_header->bgp_len);
if (hlen < BGP_SIZE) {
- ND_PRINT((ndo, "\n[|BGP Bogus header length %u < %u]", hlen,
- BGP_SIZE));
+ ND_PRINT("\nmessage length %u < %u", hlen, BGP_SIZE);
+ nd_print_invalid(ndo);
break;
}
p += hlen;
start = p;
} else {
- ND_PRINT((ndo, "\n[|BGP %s]",
+ ND_PRINT("\n[|BGP %s]",
tok2str(bgp_msg_values,
"Unknown Message Type",
- EXTRACT_U_1(bgp_header->bgp_type))));
+ GET_U_1(bgp_header->bgp_type)));
break;
}
}
return;
trunc:
- ND_PRINT((ndo, " [|BGP]"));
+ nd_print_trunc(ndo);
}
-
-/*
- * Local Variables:
- * c-style: whitesmith
- * c-basic-offset: 4
- * End:
- */
projects / tcpdump / blobdiff