/* \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>
#include "l2vpn.h"
struct bgp {
- uint8_t bgp_marker[16];
- uint16_t bgp_len;
- uint8_t bgp_type;
+ nd_byte bgp_marker[16];
+ nd_uint16_t bgp_len;
+ nd_uint8_t bgp_type;
};
-#define BGP_SIZE 19 /* unaligned */
+#define BGP_SIZE 19 /* unaligned */
-#define BGP_OPEN 1
-#define BGP_UPDATE 2
-#define BGP_NOTIFICATION 3
-#define BGP_KEEPALIVE 4
+#define BGP_OPEN 1
+#define BGP_UPDATE 2
+#define BGP_NOTIFICATION 3
+#define BGP_KEEPALIVE 4
#define BGP_ROUTE_REFRESH 5
static const struct tok bgp_msg_values[] = {
};
struct bgp_open {
- uint8_t bgpo_marker[16];
- uint16_t bgpo_len;
- uint8_t bgpo_type;
- uint8_t bgpo_version;
- uint16_t bgpo_myas;
- uint16_t bgpo_holdtime;
- uint32_t bgpo_id;
- uint8_t bgpo_optlen;
- /* options should follow */
+ nd_byte bgpo_marker[16];
+ nd_uint16_t bgpo_len;
+ nd_uint8_t bgpo_type;
+ nd_uint8_t bgpo_version;
+ nd_uint16_t bgpo_myas;
+ nd_uint16_t bgpo_holdtime;
+ nd_uint32_t bgpo_id;
+ nd_uint8_t bgpo_optlen;
+ /* options should follow */
};
-#define BGP_OPEN_SIZE 29 /* unaligned */
+#define BGP_OPEN_SIZE 29 /* unaligned */
struct bgp_opt {
- uint8_t bgpopt_type;
- uint8_t bgpopt_len;
- /* variable length */
+ nd_uint8_t bgpopt_type;
+ nd_uint8_t bgpopt_len;
+ /* variable length */
};
-#define BGP_OPT_SIZE 2 /* some compilers may pad to 4 bytes */
-#define BGP_CAP_HEADER_SIZE 2 /* some compilers may pad to 4 bytes */
+#define BGP_OPT_SIZE 2 /* some compilers may pad to 4 bytes */
+#define BGP_CAP_HEADER_SIZE 2 /* some compilers may pad to 4 bytes */
struct bgp_notification {
- uint8_t bgpn_marker[16];
- uint16_t bgpn_len;
- uint8_t bgpn_type;
- uint8_t bgpn_major;
- uint8_t bgpn_minor;
+ nd_byte bgpn_marker[16];
+ nd_uint16_t bgpn_len;
+ nd_uint8_t bgpn_type;
+ nd_uint8_t bgpn_major;
+ nd_uint8_t bgpn_minor;
};
-#define BGP_NOTIFICATION_SIZE 21 /* unaligned */
+#define BGP_NOTIFICATION_SIZE 21 /* unaligned */
struct bgp_route_refresh {
- uint8_t bgp_marker[16];
- uint16_t len;
- uint8_t type;
- uint8_t afi[2]; /* the compiler messes this structure up */
- uint8_t res; /* when doing misaligned sequences of int8 and int16 */
- uint8_t safi; /* afi should be int16 - so we have to access it using */
-}; /* EXTRACT_16BITS(&bgp_route_refresh->afi) (sigh) */
+ nd_byte bgp_marker[16];
+ nd_uint16_t len;
+ nd_uint8_t type; /* No padding after this; afi is, in fact, not aligned */
+ nd_uint16_t afi;
+ nd_uint8_t res;
+ nd_uint8_t safi;
+};
#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_16BITS(p) : *(p))
-
-#define BGPTYPE_ORIGIN 1
-#define BGPTYPE_AS_PATH 2
-#define BGPTYPE_NEXT_HOP 3
-#define BGPTYPE_MULTI_EXIT_DISC 4
-#define BGPTYPE_LOCAL_PREF 5
-#define BGPTYPE_ATOMIC_AGGREGATE 6
-#define BGPTYPE_AGGREGATOR 7
-#define BGPTYPE_COMMUNITIES 8 /* RFC1997 */
-#define BGPTYPE_ORIGINATOR_ID 9 /* RFC4456 */
-#define BGPTYPE_CLUSTER_LIST 10 /* RFC4456 */
-#define BGPTYPE_DPA 11 /* deprecated, draft-ietf-idr-bgp-dpa */
-#define BGPTYPE_ADVERTISERS 12 /* deprecated RFC1863 */
-#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 */
+ (((flags) & 0x10) ? GET_BE_U_2(p) : GET_U_1(p))
+
+#define BGPTYPE_ORIGIN 1
+#define BGPTYPE_AS_PATH 2
+#define BGPTYPE_NEXT_HOP 3
+#define BGPTYPE_MULTI_EXIT_DISC 4
+#define BGPTYPE_LOCAL_PREF 5
+#define BGPTYPE_ATOMIC_AGGREGATE 6
+#define BGPTYPE_AGGREGATOR 7
+#define BGPTYPE_COMMUNITIES 8 /* RFC1997 */
+#define BGPTYPE_ORIGINATOR_ID 9 /* RFC4456 */
+#define BGPTYPE_CLUSTER_LIST 10 /* RFC4456 */
+#define BGPTYPE_DPA 11 /* deprecated, draft-ietf-idr-bgp-dpa */
+#define BGPTYPE_ADVERTISERS 12 /* deprecated RFC1863 */
+#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 */
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}
};
#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"},
};
/* well-known community */
-#define BGP_COMMUNITY_NO_EXPORT 0xffffff01
-#define BGP_COMMUNITY_NO_ADVERT 0xffffff02
-#define BGP_COMMUNITY_NO_EXPORT_SUBCONFED 0xffffff03
+#define BGP_COMMUNITY_NO_EXPORT 0xffffff01
+#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_LINKBAND 0x4004 /* Link Bandwidth,Format AS(2B):Bandwidth(4B) */
/* rfc2547 bgp-mpls-vpns */
#define BGP_EXT_COM_VPN_ORIGIN 0x0005 /* OSPF Domain ID / VPN of Origin - draft-rosen-vpns-ospf-bgp-mpls */
-#define BGP_EXT_COM_VPN_ORIGIN2 0x0105 /* duplicate - keep for backwards compatability */
-#define BGP_EXT_COM_VPN_ORIGIN3 0x0205 /* duplicate - keep for backwards compatability */
-#define BGP_EXT_COM_VPN_ORIGIN4 0x8005 /* duplicate - keep for backwards compatability */
+#define BGP_EXT_COM_VPN_ORIGIN2 0x0105 /* duplicate - keep for backwards compatibility */
+#define BGP_EXT_COM_VPN_ORIGIN3 0x0205 /* duplicate - keep for backwards compatibility */
+#define BGP_EXT_COM_VPN_ORIGIN4 0x8005 /* duplicate - keep for backwards compatibility */
#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 compatability */
+#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 compatability */
+#define BGP_EXT_COM_OSPF_RID2 0x8001 /* duplicate - keep for backwards compatibility */
#define BGP_EXT_COM_L2INFO 0x800a /* draft-kompella-ppvpn-l2vpn */
#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 */
-#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
-#define BGP_EXT_COM_EIGRP_METRIC_LOAD_MTU 0x8803
-#define BGP_EXT_COM_EIGRP_EXT_REMAS_REMID 0x8804
+/* 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
+#define BGP_EXT_COM_EIGRP_METRIC_LOAD_MTU 0x8803
+#define BGP_EXT_COM_EIGRP_EXT_REMAS_REMID 0x8804
#define BGP_EXT_COM_EIGRP_EXT_REMPROTO_REMMETRIC 0x8805
static const struct tok bgp_extd_comm_flag_values[] = {
{ 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 */
/* ADD-PATH Send/Receive field values */
static const struct tok bgp_add_path_recvsend[] = {
- { 1, "Receive" },
- { 2, "Send" },
- { 3, "Both" },
- { 0, NULL },
+ { 1, "Receive" },
+ { 2, "Send" },
+ { 3, "Both" },
+ { 0, NULL },
};
static char astostr[20];
*/
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);
- } else {
- snprintf(str, size, "%u.%u", asnum >> 16, asnum & 0xFFFF);
- }
- return str;
+ if (!ndo->ndo_bflag || asnum <= 0xFFFF) {
+ snprintf(str, size, "%u", asnum);
+ } else {
+ snprintf(str, size, "%u.%u", asnum >> 16, asnum & 0xFFFF);
+ }
+ return str;
}
#define ITEMCHECK(minlen) if (itemlen < minlen) goto badtlv;
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;
- u_int plen, plenbytes;
-
- ND_TCHECK(pptr[0]);
- ITEMCHECK(1);
- plen = pptr[0];
- if (32 < plen)
- return -1;
- itemlen -= 1;
-
- memset(&addr, 0, sizeof(addr));
- plenbytes = (plen + 7) / 8;
- ND_TCHECK2(pptr[1], plenbytes);
- ITEMCHECK(plenbytes);
- memcpy(&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);
- return 1 + plenbytes;
+ nd_ipv4 addr;
+ u_int plen, plenbytes;
+
+ ND_TCHECK_1(pptr);
+ ITEMCHECK(1);
+ 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);
+ if (plen % 8) {
+ ((u_char *)&addr)[plenbytes - 1] &= ((0xff00 >> (plen % 8)) & 0xff);
+ }
+ snprintf(buf, buflen, "%s/%u", ipaddr_string(ndo, (const u_char *)&addr), plen);
+ return 1 + plenbytes;
trunc:
- return -2;
+ return -2;
badtlv:
- return -3;
+ return -3;
}
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;
- u_int plen, plenbytes;
-
- /* prefix length and label = 4 bytes */
- ND_TCHECK2(pptr[0], 4);
- ITEMCHECK(4);
- plen = pptr[0]; /* get prefix length */
-
- /* this is one of the weirdnesses of rfc3107
- the label length (actually the label + COS bits)
- is added to the prefix length;
- we also do only read out just one label -
- there is no real application for advertisement of
- stacked labels in a single BGP message
- */
-
- if (24 > plen)
- return -1;
-
- plen-=24; /* adjust prefixlen - labellength */
-
- if (32 < plen)
- return -1;
- itemlen -= 4;
-
- memset(&addr, 0, sizeof(addr));
- plenbytes = (plen + 7) / 8;
- ND_TCHECK2(pptr[4], plenbytes);
- ITEMCHECK(plenbytes);
- memcpy(&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),
- plen,
- EXTRACT_24BITS(pptr+1)>>4,
- ((pptr[3]&1)==0) ? "(BOGUS: Bottom of Stack NOT set!)" : "(bottom)" );
+ nd_ipv4 addr;
+ u_int plen, plenbytes;
+
+ /* prefix length and label = 4 bytes */
+ ND_TCHECK_4(pptr);
+ ITEMCHECK(4);
+ plen = GET_U_1(pptr); /* get prefix length */
+
+ /* this is one of the weirdnesses of rfc3107
+ the label length (actually the label + COS bits)
+ is added to the prefix length;
+ we also do only read out just one label -
+ there is no real application for advertisement of
+ stacked labels in a single BGP message
+ */
+
+ if (24 > plen)
+ return -1;
+
+ plen-=24; /* adjust prefixlen - labellength */
+
+ if (32 < plen)
+ return -1;
+ itemlen -= 4;
+
+ memset(&addr, 0, sizeof(addr));
+ plenbytes = (plen + 7) / 8;
+ ND_TCHECK_LEN(pptr + 4, plenbytes);
+ ITEMCHECK(plenbytes);
+ memcpy(&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/%u, label:%u %s",
+ 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 4 + plenbytes;
+ return 4 + plenbytes;
trunc:
- return -2;
+ return -2;
badtlv:
- return -3;
+ return -3;
}
/*
char *pos = addr;
switch(addr_length) {
- case (sizeof(struct in_addr) << 3): /* 32 */
- ND_TCHECK2(pptr[0], sizeof(struct in_addr));
+ case (sizeof(nd_ipv4) << 3): /* 32 */
+ ND_TCHECK_LEN(pptr, sizeof(nd_ipv4));
snprintf(pos, sizeof(addr), "%s", ipaddr_string(ndo, pptr));
break;
- case (sizeof(struct in6_addr) << 3): /* 128 */
- ND_TCHECK2(pptr[0], sizeof(struct in6_addr));
+ case (sizeof(nd_ipv6) << 3): /* 128 */
+ ND_TCHECK_LEN(pptr, sizeof(nd_ipv6));
snprintf(pos, sizeof(addr), "%s", ip6addr_string(ndo, pptr));
break;
default:
*
* 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_TCHECK2(pptr[0], 1);
- addr_length = *pptr++;
+ ND_TCHECK_1(pptr);
+ addr_length = GET_U_1(pptr);
+ pptr++;
/* Source address */
- ND_TCHECK2(pptr[0], (addr_length >> 3));
+ 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));
+ bgp_vpn_ip_print(ndo, pptr, addr_length));
pptr += (addr_length >> 3);
}
/* Group address length, encoded in bits */
- ND_TCHECK2(pptr[0], 1);
- addr_length = *pptr++;
+ ND_TCHECK_1(pptr);
+ addr_length = GET_U_1(pptr);
+ pptr++;
/* Group address */
- ND_TCHECK2(pptr[0], (addr_length >> 3));
+ 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));
+ bgp_vpn_ip_print(ndo, pptr, addr_length));
pptr += (addr_length >> 3);
}
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 */
+ /* allocate space for the largest possible string */
static char rd[sizeof("xxxxxxxxxx:xxxxx (xxx.xxx.xxx.xxx:xxxxx)")];
char *pos = rd;
/* ok lets load the RD format */
- switch (EXTRACT_16BITS(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_16BITS(pptr+2),
- EXTRACT_32BITS(pptr+4),
- *(pptr+4), *(pptr+5), *(pptr+6), *(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",
- *(pptr+2), *(pptr+3), *(pptr+4), *(pptr+5), EXTRACT_16BITS(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:
- snprintf(pos, sizeof(rd) - (pos - rd), "%s:%u (%u.%u.%u.%u:%u)",
- as_printf(ndo, astostr, sizeof(astostr), EXTRACT_32BITS(pptr+2)),
- EXTRACT_16BITS(pptr+6), *(pptr+2), *(pptr+3), *(pptr+4),
- *(pptr+5), EXTRACT_16BITS(pptr+6));
+ /* 4-byte-AS:number fmt */
+ snprintf(pos, sizeof(rd) - (pos - rd), "%s:%u (%u.%u.%u.%u:%u)",
+ 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;
+
+ 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),
+ ipaddr_string(ndo, 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",
+ ipaddr_string(ndo, 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 + 2);
+ 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", ipaddr_string(ndo, 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",
+ ipaddr_string(ndo, 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;
+ }
+}
+
+/* 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;
+ u_int plen;
+ char asbuf[sizeof(astostr)]; /* bgp_vpn_rd_print() overwrites astostr */
- ND_TCHECK(pptr[0]);
- plen = pptr[0]; /* get prefix length */
+ /* NLRI "prefix length" from RFC 2858 Section 4. */
+ ND_TCHECK_1(pptr);
+ plen = GET_U_1(pptr); /* get prefix length */
- if (0 == plen) {
- snprintf(buf, buflen, "default route target");
- return 1;
- }
+ /* NLRI "prefix" (ibid), valid lengths are { 0, 32, 33, ..., 96 } bits.
+ * RFC 4684 Section 4 defines the layout of "origin AS" and "route
+ * target" fields inside the "prefix" depending on its length.
+ */
+ if (0 == plen) {
+ /* Without "origin AS", without "route target". */
+ ND_PRINT("\n\t default route target");
+ return 1;
+ }
- if (32 > plen)
- return -1;
+ if (32 > plen) {
+ ND_PRINT("\n\t (illegal prefix length)");
+ return -1;
+ }
- plen-=32; /* adjust prefix length */
+ /* With at least "origin AS", possibly with "route target". */
+ ND_TCHECK_4(pptr + 1);
+ as_printf(ndo, asbuf, sizeof(asbuf), GET_BE_U_4(pptr + 1));
- if (64 < plen)
- return -1;
+ plen -= 32; /* adjust prefix length */
- memset(&route_target, 0, sizeof(route_target));
- ND_TCHECK2(pptr[1], (plen + 7) / 8);
- memcpy(&route_target, &pptr[1], (plen + 7) / 8);
- if (plen % 8) {
- ((u_char *)&route_target)[(plen + 7) / 8 - 1] &=
- ((0xff00 >> (plen % 8)) & 0xff);
- }
- snprintf(buf, buflen, "origin AS: %s, route target %s",
- as_printf(ndo, astostr, sizeof(astostr), EXTRACT_32BITS(pptr+1)),
- bgp_vpn_rd_print(ndo, (u_char *)&route_target));
+ /* An extended community is 8 octets, so the remaining prefix
+ * length must be 64.
+ */
+ if (64 != plen) {
+ ND_PRINT("\n\t (illegal prefix length)");
+ return -1;
+ }
+ ND_TCHECK_LEN(pptr + 5, 8);
+ ND_PRINT("\n\t origin AS: %s, route target ", asbuf);
+ bgp_extended_community_print(ndo, pptr + 5);
- return 5 + (plen + 7) / 8;
+ return 5 + 8;
trunc:
- return -2;
+ return -2;
}
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;
- u_int plen;
+ nd_ipv4 addr;
+ u_int plen;
- ND_TCHECK(pptr[0]);
- plen = pptr[0]; /* get prefix length */
+ ND_TCHECK_1(pptr);
+ plen = GET_U_1(pptr); /* get prefix length */
- if ((24+64) > plen)
- return -1;
+ if ((24+64) > plen)
+ return -1;
- plen-=(24+64); /* adjust prefixlen - labellength - RD len*/
+ plen -= (24+64); /* adjust prefixlen - labellength - RD len*/
- if (32 < plen)
- return -1;
+ if (32 < plen)
+ return -1;
- memset(&addr, 0, sizeof(addr));
- ND_TCHECK2(pptr[12], (plen + 7) / 8);
- memcpy(&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_24BITS(pptr+1)>>4,
- ((pptr[3]&1)==0) ? "(BOGUS: Bottom of Stack NOT set!)" : "(bottom)" );
+ memset(&addr, 0, sizeof(addr));
+ ND_TCHECK_LEN(pptr + 12, (plen + 7) / 8);
+ memcpy(&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/%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;
+ return 12 + (plen + 7) / 8;
trunc:
- return -2;
+ 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(pptr[0]);
+ ND_TCHECK_1(pptr);
/* if the NLRI is not predefined length, quit.*/
- if (*pptr != MDT_VPN_NLRI_LEN * 8)
- return -1;
+ if (GET_U_1(pptr) != MDT_VPN_NLRI_LEN * 8)
+ return -1;
pptr++;
/* RD */
- ND_TCHECK2(pptr[0], 8);
+ ND_TCHECK_8(pptr);
rd = pptr;
- pptr+=8;
+ pptr += 8;
/* IPv4 address */
- ND_TCHECK2(pptr[0], sizeof(struct in_addr));
+ ND_TCHECK_LEN(pptr, sizeof(nd_ipv4));
vpn_ip = pptr;
- pptr+=sizeof(struct in_addr);
+ pptr += sizeof(nd_ipv4);
/* MDT Group Address */
- ND_TCHECK2(pptr[0], sizeof(struct in_addr));
+ ND_TCHECK_LEN(pptr, sizeof(nd_ipv4));
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), ipaddr_string(ndo, vpn_ip), ipaddr_string(ndo, pptr));
return MDT_VPN_NLRI_LEN + 1;
trunc:
-
-return -2;
+ return -2;
}
#define BGP_MULTICAST_VPN_ROUTE_TYPE_INTRA_AS_I_PMSI 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;
- u_int offset;
-
- ND_TCHECK2(pptr[0], 2);
- route_type = *pptr++;
- route_length = *pptr++;
-
- snprintf(buf, buflen, "Route-Type: %s (%u), length: %u",
- tok2str(bgp_multicast_vpn_route_type_values,
- "Unknown", route_type),
- route_type, route_length);
-
- switch(route_type) {
- case BGP_MULTICAST_VPN_ROUTE_TYPE_INTRA_AS_I_PMSI:
- ND_TCHECK2(pptr[0], BGP_VPN_RD_LEN);
- offset = 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));
- break;
- case BGP_MULTICAST_VPN_ROUTE_TYPE_INTER_AS_I_PMSI:
- ND_TCHECK2(pptr[0], BGP_VPN_RD_LEN + 4);
- offset = 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_32BITS(pptr + BGP_VPN_RD_LEN)));
- break;
+ uint8_t route_type, route_length;
+ u_int addr_length, sg_length;
+ u_int offset;
- case BGP_MULTICAST_VPN_ROUTE_TYPE_S_PMSI:
- ND_TCHECK2(pptr[0], BGP_VPN_RD_LEN);
- offset = strlen(buf);
- snprintf(buf + offset, buflen - offset, ", RD: %s",
- bgp_vpn_rd_print(ndo, pptr));
- pptr += BGP_VPN_RD_LEN;
+ ND_TCHECK_2(pptr);
+ route_type = GET_U_1(pptr);
+ pptr++;
+ route_length = GET_U_1(pptr);
+ pptr++;
- sg_length = bgp_vpn_sg_print(ndo, pptr, buf, buflen);
- addr_length = route_length - sg_length;
+ snprintf(buf, buflen, "Route-Type: %s (%u), length: %u",
+ tok2str(bgp_multicast_vpn_route_type_values,
+ "Unknown", route_type),
+ route_type, route_length);
+
+ switch(route_type) {
+ case BGP_MULTICAST_VPN_ROUTE_TYPE_INTRA_AS_I_PMSI:
+ ND_TCHECK_LEN(pptr, BGP_VPN_RD_LEN);
+ 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));
+ break;
+ case BGP_MULTICAST_VPN_ROUTE_TYPE_INTER_AS_I_PMSI:
+ ND_TCHECK_LEN(pptr, BGP_VPN_RD_LEN + 4);
+ 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),
+ GET_BE_U_4(pptr + BGP_VPN_RD_LEN)));
+ break;
- ND_TCHECK2(pptr[0], addr_length);
- offset = strlen(buf);
- snprintf(buf + offset, buflen - offset, ", Originator %s",
- bgp_vpn_ip_print(ndo, pptr, addr_length << 3));
- break;
+ case BGP_MULTICAST_VPN_ROUTE_TYPE_S_PMSI:
+ ND_TCHECK_LEN(pptr, BGP_VPN_RD_LEN);
+ offset = (u_int)strlen(buf);
+ snprintf(buf + offset, buflen - offset, ", RD: %s",
+ bgp_vpn_rd_print(ndo, pptr));
+ pptr += BGP_VPN_RD_LEN;
- case BGP_MULTICAST_VPN_ROUTE_TYPE_SOURCE_ACTIVE:
- ND_TCHECK2(pptr[0], BGP_VPN_RD_LEN);
- offset = strlen(buf);
- snprintf(buf + offset, buflen - offset, ", RD: %s",
- 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;
- bgp_vpn_sg_print(ndo, pptr, buf, buflen);
- break;
+ ND_TCHECK_LEN(pptr, addr_length);
+ offset = (u_int)strlen(buf);
+ snprintf(buf + offset, buflen - offset, ", Originator %s",
+ bgp_vpn_ip_print(ndo, pptr, addr_length << 3));
+ break;
- case BGP_MULTICAST_VPN_ROUTE_TYPE_SHARED_TREE_JOIN: /* fall through */
- case BGP_MULTICAST_VPN_ROUTE_TYPE_SOURCE_TREE_JOIN:
- ND_TCHECK2(pptr[0], BGP_VPN_RD_LEN);
- offset = 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_32BITS(pptr + BGP_VPN_RD_LEN)));
- pptr += BGP_VPN_RD_LEN;
-
- bgp_vpn_sg_print(ndo, pptr, buf, buflen);
- break;
+ case BGP_MULTICAST_VPN_ROUTE_TYPE_SOURCE_ACTIVE:
+ ND_TCHECK_LEN(pptr, BGP_VPN_RD_LEN);
+ offset = (u_int)strlen(buf);
+ snprintf(buf + offset, buflen - offset, ", RD: %s",
+ bgp_vpn_rd_print(ndo, pptr));
+ pptr += BGP_VPN_RD_LEN;
- /*
- * no per route-type printing yet.
- */
- case BGP_MULTICAST_VPN_ROUTE_TYPE_INTRA_AS_SEG_LEAF:
- default:
- break;
- }
+ bgp_vpn_sg_print(ndo, pptr, buf, buflen);
+ break;
+
+ 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 = (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),
+ GET_BE_U_4(pptr + BGP_VPN_RD_LEN)));
+ pptr += BGP_VPN_RD_LEN + 4;
+
+ bgp_vpn_sg_print(ndo, pptr, buf, buflen);
+ break;
+
+ /*
+ * no per route-type printing yet.
+ */
+ case BGP_MULTICAST_VPN_ROUTE_TYPE_INTRA_AS_SEG_LEAF:
+ default:
+ break;
+ }
- return route_length + 2;
+ return route_length + 2;
trunc:
- return -2;
+ return -2;
}
/*
*/
#define UPDATE_BUF_BUFLEN(buf, buflen, stringlen) \
if (stringlen<0) \
- buflen=0; \
+ buflen=0; \
else if ((u_int)stringlen>buflen) \
buflen=0; \
else { \
buflen-=stringlen; \
- buf+=stringlen; \
+ buf+=stringlen; \
}
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;
-
- ND_TCHECK2(pptr[0], 2);
- plen=EXTRACT_16BITS(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) {
- /* assume AD-only with RD, BGPNH */
- ND_TCHECK2(pptr[0],12);
- buf[0]='\0';
- stringlen=snprintf(buf, buflen, "RD: %s, BGPNH: %s",
- bgp_vpn_rd_print(ndo, pptr),
- ipaddr_string(ndo, pptr+8)
- );
- UPDATE_BUF_BUFLEN(buf, buflen, stringlen);
- pptr+=12;
- tlen-=12;
- return plen;
- } else if (plen>17) {
- /* assume old format */
- /* RD, ID, LBLKOFF, LBLBASE */
-
- ND_TCHECK2(pptr[0],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_16BITS(pptr+8),
- EXTRACT_16BITS(pptr+10),
- EXTRACT_24BITS(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;
-
- /* ok now the variable part - lets read out TLVs*/
- while (tlen>0) {
- if (tlen < 3)
- return -1;
- ND_TCHECK2(pptr[0], 3);
- tlv_type=*pptr++;
- tlv_len=EXTRACT_16BITS(pptr);
- ttlv_len=tlv_len;
- pptr+=2;
-
- switch(tlv_type) {
- case 1:
- if (buflen!=0) {
- stringlen=snprintf(buf,buflen, "\n\t\tcircuit status vector (%u) length: %u: 0x",
- 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) {
- ND_TCHECK(pptr[0]);
- if (buflen!=0) {
- stringlen=snprintf(buf,buflen, "%02x",*pptr++);
- UPDATE_BUF_BUFLEN(buf, buflen, stringlen);
- }
- ttlv_len--;
- }
- break;
- default:
- if (buflen!=0) {
- stringlen=snprintf(buf,buflen, "\n\t\tunknown TLV #%u, length: %u",
- tlv_type,
- tlv_len);
- UPDATE_BUF_BUFLEN(buf, buflen, stringlen);
- }
- break;
- }
- tlen-=(tlv_len<<3); /* the tlv-length is expressed in bits so lets shift it right */
- }
- return plen+2;
-
- } else {
- /* complain bitterly ? */
- /* fall through */
- goto trunc;
+ u_int plen, tlen, tlv_type, tlv_len, ttlv_len;
+ int stringlen;
+
+ ND_TCHECK_2(pptr);
+ 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) {
+ /* 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));
+ UPDATE_BUF_BUFLEN(buf, buflen, stringlen);
+ 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),
+ 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;
+
+ /* ok now the variable part - lets read out TLVs*/
+ 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;
+ }
+ ND_TCHECK_3(pptr);
+ tlv_type = GET_U_1(pptr);
+ pptr++;
+ 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) {
+ stringlen=snprintf(buf,buflen, "\n\t\tcircuit status vector (%u) length: %u: 0x",
+ tlv_type,
+ tlv_len);
+ UPDATE_BUF_BUFLEN(buf, buflen, stringlen);
+ }
+ 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) {
+ stringlen=snprintf(buf,buflen, "%02x",
+ GET_U_1(pptr));
+ pptr++;
+ UPDATE_BUF_BUFLEN(buf, buflen, stringlen);
+ }
+ ttlv_len--;
+ tlen--;
+ }
+ break;
+ default:
+ if (buflen != 0) {
+ stringlen=snprintf(buf,buflen, "\n\t\tunknown TLV #%u, length: %u",
+ 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;
+ }
}
+ return plen + 2;
+ } else {
+ /* complain bitterly ? */
+ /* fall through */
+ goto trunc;
+ }
trunc:
- return -2;
+ return -2;
}
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;
- u_int plen, plenbytes;
-
- ND_TCHECK(pd[0]);
- ITEMCHECK(1);
- plen = pd[0];
- if (128 < plen)
- return -1;
- itemlen -= 1;
-
- memset(&addr, 0, sizeof(addr));
- plenbytes = (plen + 7) / 8;
- ND_TCHECK2(pd[1], plenbytes);
- ITEMCHECK(plenbytes);
- memcpy(&addr, &pd[1], plenbytes);
- if (plen % 8) {
- addr.s6_addr[plenbytes - 1] &=
- ((0xff00 >> (plen % 8)) & 0xff);
- }
- snprintf(buf, buflen, "%s/%d", ip6addr_string(ndo, &addr), plen);
- return 1 + plenbytes;
+ nd_ipv6 addr;
+ u_int plen, plenbytes;
+
+ ND_TCHECK_1(pd);
+ ITEMCHECK(1);
+ 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);
+ if (plen % 8) {
+ addr[plenbytes - 1] &=
+ ((0xff00 >> (plen % 8)) & 0xff);
+ }
+ snprintf(buf, buflen, "%s/%u", ip6addr_string(ndo, (const u_char *)&addr), plen);
+ return 1 + plenbytes;
trunc:
- return -2;
+ return -2;
badtlv:
- return -3;
+ return -3;
}
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;
- u_int plen, plenbytes;
-
- /* prefix length and label = 4 bytes */
- ND_TCHECK2(pptr[0], 4);
- ITEMCHECK(4);
- plen = pptr[0]; /* get prefix length */
-
- if (24 > plen)
- return -1;
-
- plen-=24; /* adjust prefixlen - labellength */
-
- if (128 < plen)
- return -1;
- itemlen -= 4;
-
- memset(&addr, 0, sizeof(addr));
- plenbytes = (plen + 7) / 8;
- ND_TCHECK2(pptr[4], plenbytes);
- memcpy(&addr, &pptr[4], plenbytes);
- if (plen % 8) {
- addr.s6_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_24BITS(pptr+1)>>4,
- ((pptr[3]&1)==0) ? "(BOGUS: Bottom of Stack NOT set!)" : "(bottom)" );
+ nd_ipv6 addr;
+ u_int plen, plenbytes;
+
+ /* prefix length and label = 4 bytes */
+ ND_TCHECK_4(pptr);
+ ITEMCHECK(4);
+ plen = GET_U_1(pptr); /* get prefix length */
+
+ if (24 > plen)
+ return -1;
+
+ plen -= 24; /* adjust prefixlen - labellength */
+
+ if (128 < plen)
+ return -1;
+ itemlen -= 4;
+
+ memset(&addr, 0, sizeof(addr));
+ plenbytes = (plen + 7) / 8;
+ ND_TCHECK_LEN(pptr + 4, plenbytes);
+ memcpy(&addr, pptr + 4, plenbytes);
+ if (plen % 8) {
+ addr[plenbytes - 1] &=
+ ((0xff00 >> (plen % 8)) & 0xff);
+ }
+ /* the label may get offsetted by 4 bits so lets shift it right */
+ 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;
+ return 4 + plenbytes;
trunc:
- return -2;
+ return -2;
badtlv:
- return -3;
+ return -3;
}
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;
- u_int plen;
+ nd_ipv6 addr;
+ u_int plen;
- ND_TCHECK(pptr[0]);
- plen = pptr[0]; /* get prefix length */
+ ND_TCHECK_1(pptr);
+ plen = GET_U_1(pptr); /* get prefix length */
- if ((24+64) > plen)
- return -1;
+ if ((24+64) > plen)
+ return -1;
- plen-=(24+64); /* adjust prefixlen - labellength - RD len*/
+ plen -= (24+64); /* adjust prefixlen - labellength - RD len*/
- if (128 < plen)
- return -1;
+ if (128 < plen)
+ return -1;
- memset(&addr, 0, sizeof(addr));
- ND_TCHECK2(pptr[12], (plen + 7) / 8);
- memcpy(&addr, &pptr[12], (plen + 7) / 8);
- if (plen % 8) {
- addr.s6_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_24BITS(pptr+1)>>4,
- ((pptr[3]&1)==0) ? "(BOGUS: Bottom of Stack NOT set!)" : "(bottom)" );
+ memset(&addr, 0, sizeof(addr));
+ ND_TCHECK_LEN(pptr + 12, (plen + 7) / 8);
+ memcpy(&addr, pptr + 12, (plen + 7) / 8);
+ if (plen % 8) {
+ 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/%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;
+ return 12 + (plen + 7) / 8;
trunc:
- return -2;
+ 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;
+ uint8_t addr[19];
+ u_int plen;
- ND_TCHECK(pptr[0]);
- plen = pptr[0]; /* get prefix length */
+ ND_TCHECK_1(pptr);
+ plen = GET_U_1(pptr); /* get prefix length */
- if (152 < plen)
- return -1;
+ if (152 < plen)
+ return -1;
- memset(&addr, 0, sizeof(addr));
- ND_TCHECK2(pptr[4], (plen + 7) / 8);
- memcpy(&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);
+ memset(&addr, 0, sizeof(addr));
+ ND_TCHECK_LEN(pptr + 4, (plen + 7) / 8);
+ memcpy(&addr, pptr + 4, (plen + 7) / 8);
+ if (plen % 8) {
+ addr[(plen + 7) / 8 - 1] &=
+ ((0xff00 >> (plen % 8)) & 0xff);
+ }
+ snprintf(buf, buflen, "%s/%u",
+ isonsap_string(ndo, addr,(plen + 7) / 8),
+ plen);
- return 1 + (plen + 7) / 8;
+ return 1 + (plen + 7) / 8;
trunc:
- return -2;
+ 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;
+ uint8_t addr[19];
+ u_int plen;
- ND_TCHECK(pptr[0]);
- plen = pptr[0]; /* get prefix length */
+ ND_TCHECK_1(pptr);
+ plen = GET_U_1(pptr); /* get prefix length */
- if ((24+64) > plen)
- return -1;
+ if ((24+64) > plen)
+ return -1;
- plen-=(24+64); /* adjust prefixlen - labellength - RD len*/
+ plen -= (24+64); /* adjust prefixlen - labellength - RD len*/
- if (152 < plen)
- return -1;
+ if (152 < plen)
+ return -1;
- memset(&addr, 0, sizeof(addr));
- ND_TCHECK2(pptr[12], (plen + 7) / 8);
- memcpy(&addr, &pptr[12], (plen + 7) / 8);
- if (plen % 8) {
- 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_24BITS(pptr+1)>>4,
- ((pptr[3]&1)==0) ? "(BOGUS: Bottom of Stack NOT set!)" : "(bottom)" );
+ memset(&addr, 0, sizeof(addr));
+ ND_TCHECK_LEN(pptr + 12, (plen + 7) / 8);
+ memcpy(&addr, pptr + 12, (plen + 7) / 8);
+ if (plen % 8) {
+ 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/%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;
+ return 12 + (plen + 7) / 8;
trunc:
- return -2;
+ 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(tptr[0]);
+ ND_TCHECK_1(tptr);
/*
* If we do not find a valid segment type, our guess might be wrong.
*/
- if (tptr[0] < BGP_AS_SEG_TYPE_MIN || tptr[0] > 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(tptr[1]);
- tptr += 2 + tptr[1] * 2;
+ ND_TCHECK_1(tptr + 1);
+ tptr += 2 + GET_U_1(tptr + 1) * 2;
}
/*
* so that calller can try to decode each AS as of 4 bytes. If indeed
* there was not enough data, it will crib and end the parse anyways.
*/
- return 4;
+ 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;
-
- switch (atype) {
- case BGPTYPE_ORIGIN:
- if (len != 1)
- ND_PRINT((ndo, "invalid len"));
- else {
- ND_TCHECK(*tptr);
- ND_PRINT((ndo, "%s", tok2str(bgp_origin_values,
- "Unknown Origin Typecode",
- tptr[0])));
- }
- break;
+ u_int offset, prefix_length;
+
+ if (length < 5) {
+ return 0;
+ }
+ /*
+ * Scan through the NLRI information under the assumpetion that
+ * it doesn't have path IDs.
+ */
+ 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);
/*
- * Process AS4 byte path and AS2 byte path attributes here.
+ * Add 4 to cover the path id
+ * and check the prefix length isn't greater than 32/128.
*/
- case BGPTYPE_AS4_PATH:
- case BGPTYPE_AS_PATH:
- if (len % 2) {
- ND_PRINT((ndo, "invalid len"));
- break;
- }
- if (!len) {
- ND_PRINT((ndo, "empty"));
- break;
- }
+ if (prefix_length > max_prefix_length) {
+ return 0;
+ }
+ /* 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;
+ }
- /*
- * 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_TCHECK(tptr[0]);
- ND_PRINT((ndo, "%s", tok2str(bgp_as_path_segment_open_values,
- "?", tptr[0])));
- for (i = 0; i < tptr[1] * as_size; i += as_size) {
- ND_TCHECK2(tptr[2 + i], as_size);
- ND_PRINT((ndo, "%s ",
- as_printf(ndo, astostr, sizeof(astostr),
- as_size == 2 ?
- EXTRACT_16BITS(&tptr[2 + i]) :
- EXTRACT_32BITS(&tptr[2 + i]))));
- }
- ND_TCHECK(tptr[0]);
- ND_PRINT((ndo, "%s", tok2str(bgp_as_path_segment_close_values,
- "?", tptr[0])));
- ND_TCHECK(tptr[1]);
- tptr += 2 + tptr[1] * as_size;
- }
- break;
- case BGPTYPE_NEXT_HOP:
- if (len != 4)
- ND_PRINT((ndo, "invalid len"));
- else {
- ND_TCHECK2(tptr[0], 4);
- 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_TCHECK2(tptr[0], 4);
- ND_PRINT((ndo, "%u", EXTRACT_32BITS(tptr)));
- }
- break;
- case BGPTYPE_ATOMIC_AGGREGATE:
- if (len != 0)
- ND_PRINT((ndo, "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((ndo, "invalid len"));
- break;
+ /* 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;
+ }
+ 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;
+ }
+ offset += 1 + ((prefix_length + 7) / 8);
+ }
+ if (offset > length) {
+ return 1;
+ }
+
+ /* assume not add-path by default */
+ return 0;
+}
+
+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);
+
+ 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_VPNUNICAST):
+ case (AFNUM_INET<<8 | SAFNUM_VPNMULTICAST):
+ case (AFNUM_INET<<8 | SAFNUM_VPNUNIMULTICAST):
+ case (AFNUM_INET<<8 | SAFNUM_MULTICAST_VPN):
+ case (AFNUM_INET<<8 | SAFNUM_MDT):
+ case (AFNUM_INET6<<8 | SAFNUM_UNICAST):
+ case (AFNUM_INET6<<8 | SAFNUM_MULTICAST):
+ case (AFNUM_INET6<<8 | SAFNUM_UNIMULTICAST):
+ case (AFNUM_INET6<<8 | SAFNUM_LABUNICAST):
+ case (AFNUM_INET6<<8 | SAFNUM_VPNUNICAST):
+ case (AFNUM_INET6<<8 | SAFNUM_VPNMULTICAST):
+ case (AFNUM_INET6<<8 | SAFNUM_VPNUNIMULTICAST):
+ case (AFNUM_NSAP<<8 | SAFNUM_UNICAST):
+ case (AFNUM_NSAP<<8 | SAFNUM_MULTICAST):
+ case (AFNUM_NSAP<<8 | SAFNUM_UNIMULTICAST):
+ case (AFNUM_NSAP<<8 | SAFNUM_VPNUNICAST):
+ case (AFNUM_NSAP<<8 | SAFNUM_VPNMULTICAST):
+ case (AFNUM_NSAP<<8 | SAFNUM_VPNUNIMULTICAST):
+ case (AFNUM_L2VPN<<8 | SAFNUM_VPNUNICAST):
+ case (AFNUM_L2VPN<<8 | SAFNUM_VPNMULTICAST):
+ case (AFNUM_L2VPN<<8 | SAFNUM_VPNUNIMULTICAST):
+ case (AFNUM_VPLS<<8 | SAFNUM_VPLS):
+ break;
+ default:
+ ND_TCHECK_LEN(tptr, tlen);
+ 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);
+ return -1;
+ }
+ return 0;
+trunc:
+ return -2;
+}
+
+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;
+
+ switch (af<<8 | safi) {
+ case (AFNUM_INET<<8 | SAFNUM_UNICAST):
+ case (AFNUM_INET<<8 | SAFNUM_MULTICAST):
+ case (AFNUM_INET<<8 | SAFNUM_UNIMULTICAST):
+ if (add_path4) {
+ path_id = GET_BE_U_4(tptr);
+ tptr += 4;
}
- ND_TCHECK2(tptr[0], len);
- if (len == 6) {
- ND_PRINT((ndo, " AS #%s, origin %s",
- as_printf(ndo, astostr, sizeof(astostr), EXTRACT_16BITS(tptr)),
- ipaddr_string(ndo, tptr + 2)));
- } else {
- ND_PRINT((ndo, " AS #%s, origin %s",
- as_printf(ndo, astostr, sizeof(astostr),
- EXTRACT_32BITS(tptr)), ipaddr_string(ndo, tptr + 4)));
+ advance = decode_prefix4(ndo, tptr, len, buf, buflen);
+ if (advance == -1)
+ 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("\n\t %s", buf);
+ if (add_path4) {
+ ND_PRINT(" Path Id: %u", path_id);
+ advance += 4;
}
break;
- case BGPTYPE_AGGREGATOR4:
- if (len != 8) {
- ND_PRINT((ndo, "invalid len"));
- break;
- }
- ND_TCHECK2(tptr[0], 8);
- ND_PRINT((ndo, " AS #%s, origin %s",
- as_printf(ndo, astostr, sizeof(astostr), EXTRACT_32BITS(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_TCHECK2(tptr[0], 4);
- comm = EXTRACT_32BITS(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_TCHECK2(tptr[0], 4);
- ND_PRINT((ndo, "%s",ipaddr_string(ndo, tptr)));
+ case (AFNUM_INET<<8 | SAFNUM_LABUNICAST):
+ advance = decode_labeled_prefix4(ndo, tptr, len, buf, buflen);
+ if (advance == -1)
+ 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("\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, buflen);
+ if (advance == -1)
+ ND_PRINT("\n\t (illegal prefix length)");
+ else if (advance == -2)
+ goto trunc;
+ else
+ ND_PRINT("\n\t %s", buf);
+ break;
+ case (AFNUM_INET<<8 | SAFNUM_RT_ROUTING_INFO):
+ advance = decode_rt_routing_info(ndo, tptr);
+ if (advance == -2)
+ goto trunc;
+ break;
+ case (AFNUM_INET<<8 | SAFNUM_MULTICAST_VPN): /* fall through */
+ case (AFNUM_INET6<<8 | SAFNUM_MULTICAST_VPN):
+ advance = decode_multicast_vpn(ndo, tptr, buf, buflen);
+ if (advance == -1)
+ ND_PRINT("\n\t (illegal prefix length)");
+ else if (advance == -2)
+ goto trunc;
+ else
+ ND_PRINT("\n\t %s", buf);
break;
- case BGPTYPE_CLUSTER_LIST:
- if (len % 4) {
- ND_PRINT((ndo, "invalid len"));
- break;
- }
- while (tlen>0) {
- ND_TCHECK2(tptr[0], 4);
- ND_PRINT((ndo, "%s%s",
- ipaddr_string(ndo, tptr),
- (tlen>4) ? ", " : ""));
- tlen -=4;
- tptr +=4;
+
+ case (AFNUM_INET<<8 | SAFNUM_MDT):
+ advance = decode_mdt_vpn_nlri(ndo, tptr, buf, buflen);
+ if (advance == -1)
+ ND_PRINT("\n\t (illegal prefix length)");
+ else if (advance == -2)
+ goto trunc;
+ else
+ 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):
+ 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("\n\t (illegal prefix length)");
+ else if (advance == -2)
+ goto trunc;
+ else if (advance == -3)
+ break; /* bytes left, but not enough */
+ else
+ 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, buflen);
+ if (advance == -1)
+ 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("\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, buflen);
+ if (advance == -1)
+ ND_PRINT("\n\t (illegal prefix length)");
+ else if (advance == -2)
+ goto trunc;
+ else
+ 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, buflen);
+ if (advance == -1)
+ ND_PRINT("\n\t (illegal length)");
+ else if (advance == -2)
+ goto trunc;
+ else
+ 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, buflen);
+ if (advance == -1)
+ ND_PRINT("\n\t (illegal prefix length)");
+ else if (advance == -2)
+ goto trunc;
+ else
+ 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, buflen);
+ if (advance == -1)
+ ND_PRINT("\n\t (illegal prefix length)");
+ else if (advance == -2)
+ goto trunc;
+ else
+ ND_PRINT("\n\t %s", buf);
break;
- case BGPTYPE_MP_REACH_NLRI:
- ND_TCHECK2(tptr[0], 3);
- af = EXTRACT_16BITS(tptr);
- safi = 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));
+ default:
+ /*
+ * 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)
+{
+ 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_TCHECK_1(tptr);
+ 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_TCHECK_1(tptr);
+ ND_PRINT("%s", tok2str(bgp_as_path_segment_open_values,
+ "?", GET_U_1(tptr)));
+ ND_TCHECK_1(tptr + 1);
+ 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_TCHECK_1(tptr);
+ ND_PRINT("%s", tok2str(bgp_as_path_segment_close_values,
+ "?", GET_U_1(tptr)));
+ ND_TCHECK_1(tptr + 1);
+ tptr += 2 + GET_U_1(tptr + 1) * as_size;
+ }
+ break;
+ case BGPTYPE_NEXT_HOP:
+ if (len != 4)
+ ND_PRINT("invalid len");
+ else {
+ ND_TCHECK_4(tptr);
+ ND_PRINT("%s", ipaddr_string(ndo, tptr));
+ }
+ break;
+ case BGPTYPE_MULTI_EXIT_DISC:
+ case BGPTYPE_LOCAL_PREF:
+ if (len != 4)
+ ND_PRINT("invalid len");
+ else {
+ ND_TCHECK_4(tptr);
+ 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)),
+ ipaddr_string(ndo, tptr + 2));
+ } else {
+ ND_PRINT(" AS #%s, origin %s",
+ as_printf(ndo, astostr, sizeof(astostr),
+ GET_BE_U_4(tptr)), ipaddr_string(ndo, tptr + 4));
+ }
+ break;
+ case BGPTYPE_AGGREGATOR4:
+ if (len != 8) {
+ ND_PRINT("invalid len");
+ break;
+ }
+ ND_TCHECK_8(tptr);
+ ND_PRINT(" AS #%s, origin %s",
+ as_printf(ndo, astostr, sizeof(astostr), GET_BE_U_4(tptr)),
+ ipaddr_string(ndo, 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_TCHECK_4(tptr);
+ ND_PRINT("%s",ipaddr_string(ndo, tptr));
+ break;
+ case BGPTYPE_CLUSTER_LIST:
+ if (len % 4) {
+ ND_PRINT("invalid len");
+ break;
+ }
+ while (tlen != 0) {
+ ND_TCHECK_4(tptr);
+ if (tlen < 4)
+ goto trunc;
+ ND_PRINT("%s%s",
+ ipaddr_string(ndo, 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);
+ 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_TCHECK_LEN(tptr, sizeof(nd_ipv4));
+ ND_PRINT("%s",ipaddr_string(ndo, 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):
- case (AFNUM_INET<<8 | SAFNUM_MULTICAST_VPN):
- case (AFNUM_INET<<8 | SAFNUM_MDT):
+ if (tnhlen < sizeof(nd_ipv4)+BGP_VPN_RD_LEN) {
+ ND_PRINT("invalid len");
+ tptr += tnhlen;
+ tlen -= tnhlen;
+ tnhlen = 0;
+ } else {
+ ND_TCHECK_LEN(tptr,
+ sizeof(nd_ipv4) + BGP_VPN_RD_LEN);
+ ND_PRINT("RD: %s, %s",
+ bgp_vpn_rd_print(ndo, tptr),
+ ipaddr_string(ndo, 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_TCHECK_LEN(tptr, sizeof(nd_ipv6));
+ ND_PRINT("%s", ip6addr_string(ndo, 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_TCHECK_LEN(tptr,
+ sizeof(nd_ipv6) + BGP_VPN_RD_LEN);
+ ND_PRINT("RD: %s, %s",
+ bgp_vpn_rd_print(ndo, tptr),
+ ip6addr_string(ndo, 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_TCHECK_LEN(tptr, sizeof(nd_ipv4));
+ ND_PRINT("%s", ipaddr_string(ndo, 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_TCHECK_LEN(tptr, tnhlen);
+ ND_PRINT("%s", isonsap_string(ndo, 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):
- case (AFNUM_L2VPN<<8 | SAFNUM_VPNUNICAST):
- case (AFNUM_L2VPN<<8 | SAFNUM_VPNMULTICAST):
- case (AFNUM_L2VPN<<8 | SAFNUM_VPNUNIMULTICAST):
- case (AFNUM_VPLS<<8 | SAFNUM_VPLS):
+ 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),
+ isonsap_string(ndo, 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", ipaddr_string(ndo, 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", ip6addr_string(ndo, tptr+BGP_VPN_RD_LEN+3));
+ tptr += tnhlen;
+ tlen -= tnhlen;
+ tnhlen = 0;
+ }
break;
default:
- ND_TCHECK2(tptr[0], 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);
+ /*
+ * 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);
- tptr +=3;
-
- ND_TCHECK(tptr[0]);
- nhlen = tptr[0];
- tlen = nhlen;
+ /* As per RFC 2858; this is reserved in RFC 4760 */
+ if (tlen < 1)
+ goto trunc;
+ ND_TCHECK_1(tptr);
+ 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;
+ ND_TCHECK_1(tptr);
+ snpalen = GET_U_1(tptr);
+ ND_PRINT("\n\t %u bytes", snpalen);
tptr++;
+ tlen--;
+ if (tlen < snpalen)
+ goto trunc;
+ tptr += snpalen;
+ tlen -= snpalen;
+ }
+ } else {
+ ND_PRINT(", no SNPA");
+ }
- 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 < (int)sizeof(struct in_addr)) {
- ND_PRINT((ndo, "invalid len"));
- tlen = 0;
- } else {
- ND_TCHECK2(tptr[0], 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 < (int)(sizeof(struct in_addr)+BGP_VPN_RD_LEN)) {
- ND_PRINT((ndo, "invalid len"));
- tlen = 0;
- } else {
- ND_TCHECK2(tptr[0], 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 < (int)sizeof(struct in6_addr)) {
- ND_PRINT((ndo, "invalid len"));
- tlen = 0;
- } else {
- ND_TCHECK2(tptr[0], 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 < (int)(sizeof(struct in6_addr)+BGP_VPN_RD_LEN)) {
- ND_PRINT((ndo, "invalid len"));
- tlen = 0;
- } else {
- ND_TCHECK2(tptr[0], 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 < (int)sizeof(struct in_addr)) {
- ND_PRINT((ndo, "invalid len"));
- tlen = 0;
- } else {
- ND_TCHECK2(tptr[0], 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_TCHECK2(tptr[0], 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_TCHECK2(tptr[0], 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_32BITS(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_24BITS(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_TCHECK2(tptr[0], 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(tptr[0]);
- snpa = tptr[0];
- tptr++;
-
- if (snpa) {
- ND_PRINT((ndo, "\n\t %u SNPA", snpa));
- for (/*nothing*/; snpa > 0; snpa--) {
- ND_TCHECK(tptr[0]);
- ND_PRINT((ndo, "\n\t %d bytes", tptr[0]));
- tptr += tptr[0] + 1;
- }
- } else {
- ND_PRINT((ndo, ", 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 (len - (tptr - pptr) > 0) {
- 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_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));
- 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;
-
- 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_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;
- default:
- ND_TCHECK2(*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;
- break;
- }
- if (advance < 0)
- break;
- tptr += advance;
- }
- done:
- break;
-
- case BGPTYPE_MP_UNREACH_NLRI:
- ND_TCHECK2(tptr[0], BGP_MP_NLRI_MINSIZE);
- af = EXTRACT_16BITS(tptr);
- safi = 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));
-
- if (len == BGP_MP_NLRI_MINSIZE)
- ND_PRINT((ndo, "\n\t End-of-Rib Marker (empty NLRI)"));
-
- tptr += 3;
-
- while (len - (tptr - pptr) > 0) {
- 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_TCHECK2(*(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;
- }
- if (advance < 0)
- break;
- tptr += advance;
- }
- break;
- case BGPTYPE_EXTD_COMMUNITIES:
- if (len % 8) {
- ND_PRINT((ndo, "invalid len"));
- break;
- }
- while (tlen>0) {
- uint16_t extd_comm;
-
- ND_TCHECK2(tptr[0], 2);
- extd_comm=EXTRACT_16BITS(tptr);
-
- ND_PRINT((ndo, "\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_TCHECK2(*(tptr+2), 6);
- 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_16BITS(tptr+2),
- EXTRACT_32BITS(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_16BITS(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_32BITS(tptr+2)), EXTRACT_16BITS(tptr+6)));
- break;
- case BGP_EXT_COM_LINKBAND:
- bw.i = EXTRACT_32BITS(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)",
- *(tptr+6)),
- (*(tptr+7) & BGP_OSPF_RTYPE_METRIC_TYPE) ? "E2" : "",
- ((*(tptr+6) == BGP_OSPF_RTYPE_EXT) || (*(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",
- *(tptr+2)),
- *(tptr+3),
- EXTRACT_16BITS(tptr+4)));
- break;
- case BGP_EXT_COM_SOURCE_AS:
- ND_PRINT((ndo, ": AS %u", EXTRACT_16BITS(tptr+2)));
- break;
- default:
- ND_TCHECK2(*tptr,8);
- print_unknown_data(ndo, tptr, "\n\t ", 8);
- break;
- }
- tlen -=8;
- tptr +=8;
- }
+ 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;
+ }
+ break;
- case BGPTYPE_PMSI_TUNNEL:
- {
- uint8_t tunnel_type, flags;
-
- tunnel_type = *(tptr+1);
- flags = *tptr;
- tlen = len;
-
- ND_TCHECK2(tptr[0], 5);
- ND_PRINT((ndo, "\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_24BITS(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_TCHECK2(tptr[0], 8);
- ND_PRINT((ndo, "\n\t Sender %s, P-Group %s",
- ipaddr_string(ndo, tptr),
- ipaddr_string(ndo, tptr+4)));
- break;
+ case BGPTYPE_MP_UNREACH_NLRI:
+ ND_TCHECK_LEN(tptr, BGP_MP_NLRI_MINSIZE);
+ ret = bgp_mp_af_print(ndo, tptr, tlen, &af, &safi);
+ if (ret == -2)
+ goto trunc;
+ if (ret < 0)
+ break;
- case BGP_PMSI_TUNNEL_PIM_SSM:
- ND_TCHECK2(tptr[0], 8);
- ND_PRINT((ndo, "\n\t Root-Node %s, P-Group %s",
- ipaddr_string(ndo, tptr),
- ipaddr_string(ndo, tptr+4)));
- break;
- case BGP_PMSI_TUNNEL_INGRESS:
- ND_TCHECK2(tptr[0], 4);
- ND_PRINT((ndo, "\n\t Tunnel-Endpoint %s",
- ipaddr_string(ndo, tptr)));
- break;
- case BGP_PMSI_TUNNEL_LDP_P2MP: /* fall through */
- case BGP_PMSI_TUNNEL_LDP_MP2MP:
- ND_TCHECK2(tptr[0], 8);
- ND_PRINT((ndo, "\n\t Root-Node %s, LSP-ID 0x%08x",
- ipaddr_string(ndo, tptr),
- EXTRACT_32BITS(tptr+4)));
- break;
- case BGP_PMSI_TUNNEL_RSVP_P2MP:
- ND_TCHECK2(tptr[0], 8);
- ND_PRINT((ndo, "\n\t Extended-Tunnel-ID %s, P2MP-ID 0x%08x",
- ipaddr_string(ndo, tptr),
- EXTRACT_32BITS(tptr+4)));
- break;
- default:
- if (ndo->ndo_vflag <= 1) {
- print_unknown_data(ndo, tptr, "\n\t ", tlen);
- }
- }
+ if (len == BGP_MP_NLRI_MINSIZE)
+ 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) {
+ 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("invalid len");
+ break;
}
- case BGPTYPE_AIGP:
- {
- uint8_t type;
- uint16_t length;
+ while (tlen != 0) {
+ uint16_t extd_comm;
+
+ ND_TCHECK_2(tptr);
+ if (tlen < 2)
+ goto trunc;
+ extd_comm=GET_BE_U_2(tptr);
+
+ 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_8(tptr);
+ if (tlen < 8)
+ goto trunc;
+ ND_PRINT(": ");
+ bgp_extended_community_print(ndo, tptr);
+ tlen -= 8;
+ tptr += 8;
+ }
+ break;
- ND_TCHECK2(tptr[0], 3);
+ case BGPTYPE_PMSI_TUNNEL:
+ {
+ uint8_t tunnel_type, flags;
- tlen = len;
+ ND_TCHECK_5(tptr);
+ if (tlen < 5)
+ goto trunc;
+ flags = GET_U_1(tptr);
+ tunnel_type = GET_U_1(tptr + 1);
+ tlen = len;
+
+ 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),
+ 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("\n\t Sender %s, P-Group %s",
+ ipaddr_string(ndo, tptr),
+ ipaddr_string(ndo, tptr+4));
+ break;
- while (tlen >= 3) {
+ case BGP_PMSI_TUNNEL_PIM_SSM:
+ ND_TCHECK_8(tptr);
+ ND_PRINT("\n\t Root-Node %s, P-Group %s",
+ ipaddr_string(ndo, tptr),
+ ipaddr_string(ndo, tptr+4));
+ break;
+ case BGP_PMSI_TUNNEL_INGRESS:
+ ND_TCHECK_4(tptr);
+ ND_PRINT("\n\t Tunnel-Endpoint %s",
+ ipaddr_string(ndo, tptr));
+ break;
+ case BGP_PMSI_TUNNEL_LDP_P2MP: /* fall through */
+ case BGP_PMSI_TUNNEL_LDP_MP2MP:
+ ND_TCHECK_8(tptr);
+ ND_PRINT("\n\t Root-Node %s, LSP-ID 0x%08x",
+ ipaddr_string(ndo, tptr),
+ GET_BE_U_4(tptr + 4));
+ break;
+ case BGP_PMSI_TUNNEL_RSVP_P2MP:
+ ND_TCHECK_8(tptr);
+ ND_PRINT("\n\t Extended-Tunnel-ID %s, P2MP-ID 0x%08x",
+ ipaddr_string(ndo, tptr),
+ GET_BE_U_4(tptr + 4));
+ break;
+ default:
+ if (ndo->ndo_vflag <= 1) {
+ print_unknown_data(ndo, tptr, "\n\t ", tlen);
+ }
+ }
+ break;
+ }
+ case BGPTYPE_AIGP:
+ {
+ uint8_t type;
+ uint16_t length;
- type = *tptr;
- length = EXTRACT_16BITS(tptr+1);
+ tlen = len;
- ND_PRINT((ndo, "\n\t %s TLV (%u), length %u",
- tok2str(bgp_aigp_values, "Unknown", type),
- type, length));
+ while (tlen >= 3) {
- /*
- * Check if we can read the TLV data.
- */
- ND_TCHECK2(tptr[3], length - 3);
-
- switch (type) {
-
- case BGP_AIGP_TLV:
- ND_TCHECK2(tptr[3], 8);
- ND_PRINT((ndo, ", metric %" PRIu64,
- EXTRACT_64BITS(tptr+3)));
- break;
-
- default:
- if (ndo->ndo_vflag <= 1) {
- print_unknown_data(ndo, tptr+3,"\n\t ", length-3);
- }
- }
-
- tptr += length;
- tlen -= length;
- }
- break;
- }
- case BGPTYPE_ATTR_SET:
- ND_TCHECK2(tptr[0], 4);
- if (len < 4)
- goto trunc;
- ND_PRINT((ndo, "\n\t Origin AS: %s",
- as_printf(ndo, astostr, sizeof(astostr), EXTRACT_32BITS(tptr))));
- tptr+=4;
- len -=4;
-
- while (len) {
- u_int aflags, alenlen, alen;
-
- ND_TCHECK2(tptr[0], 2);
- if (len < 2)
- goto trunc;
- aflags = *tptr;
- atype = *(tptr + 1);
- tptr += 2;
- len -= 2;
- alenlen = bgp_attr_lenlen(aflags, tptr);
- ND_TCHECK2(tptr[0], alenlen);
- if (len < alenlen)
- goto trunc;
- alen = bgp_attr_len(aflags, tptr);
- tptr += alenlen;
- len -= alenlen;
-
- ND_PRINT((ndo, "\n\t %s (%u), length: %u",
- tok2str(bgp_attr_values,
- "Unknown Attribute", atype),
- atype,
- alen));
-
- if (aflags) {
- ND_PRINT((ndo, ", Flags [%s%s%s%s",
- aflags & 0x80 ? "O" : "",
- aflags & 0x40 ? "T" : "",
- aflags & 0x20 ? "P" : "",
- aflags & 0x10 ? "E" : ""));
- if (aflags & 0xf)
- ND_PRINT((ndo, "+%x", aflags & 0xf));
- ND_PRINT((ndo, "]: "));
- }
- /* FIXME check for recursion */
- if (!bgp_attr_print(ndo, atype, tptr, alen))
- return 0;
- tptr += alen;
- len -= alen;
- }
+ ND_TCHECK_3(tptr);
+
+ type = GET_U_1(tptr);
+ length = GET_BE_U_2(tptr + 1);
+ tptr += 3;
+ tlen -= 3;
+
+ ND_PRINT("\n\t %s TLV (%u), length %u",
+ tok2str(bgp_aigp_values, "Unknown", type),
+ type, length);
+
+ if (length < 3)
+ goto trunc;
+ length -= 3;
+
+ /*
+ * 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(", metric %" PRIu64,
+ GET_BE_U_8(tptr));
break;
- case BGPTYPE_LARGE_COMMUNITY:
- if (len == 0 || len % 12) {
- ND_PRINT((ndo, "invalid len"));
- break;
- }
- ND_PRINT((ndo, "\n\t "));
- while (len > 0) {
- ND_TCHECK2(*tptr, 12);
- ND_PRINT((ndo, "%u:%u:%u%s",
- EXTRACT_32BITS(tptr),
- EXTRACT_32BITS(tptr + 4),
- EXTRACT_32BITS(tptr + 8),
- (len > 12) ? ", " : ""));
- tptr += 12;
- len -= 12;
- }
- break;
- default:
- ND_TCHECK2(*pptr,len);
- ND_PRINT((ndo, "\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);
+ default:
+ if (ndo->ndo_vflag <= 1) {
+ print_unknown_data(ndo, tptr,"\n\t ", length);
+ }
+ }
+
+ tptr += length;
+ tlen -= length;
+ }
+ break;
+ }
+ case BGPTYPE_ATTR_SET:
+ ND_TCHECK_4(tptr);
+ if (len < 4)
+ goto trunc;
+ ND_PRINT("\n\t Origin AS: %s",
+ as_printf(ndo, astostr, sizeof(astostr), GET_BE_U_4(tptr)));
+ tptr += 4;
+ len -= 4;
+
+ while (len) {
+ u_int aflags, alenlen, alen;
+
+ ND_TCHECK_2(tptr);
+ 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) {
+ ND_PRINT(" [path attr too short]");
+ tptr += len;
+ break;
+ }
+ alen = bgp_attr_len(aflags, tptr);
+ tptr += alenlen;
+ len -= alenlen;
+
+ ND_PRINT("\n\t %s (%u), length: %u",
+ tok2str(bgp_attr_values,
+ "Unknown Attribute", atype),
+ atype,
+ alen);
+
+ if (aflags) {
+ ND_PRINT(", Flags [%s%s%s%s",
+ aflags & 0x80 ? "O" : "",
+ aflags & 0x40 ? "T" : "",
+ aflags & 0x20 ? "P" : "",
+ aflags & 0x10 ? "E" : "");
+ if (aflags & 0xf)
+ ND_PRINT("+%x", aflags & 0xf);
+ ND_PRINT("]");
+ }
+ 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;
+ }
+ break;
+
+ case BGPTYPE_LARGE_COMMUNITY:
+ if (len == 0 || len % 12) {
+ ND_PRINT("invalid len");
break;
- }
- if (ndo->ndo_vflag > 1 && len) { /* omit zero length attributes*/
- ND_TCHECK2(*pptr,len);
- print_unknown_data(ndo, pptr, "\n\t ", len);
}
- return 1;
+ ND_PRINT("\n\t ");
+ while (len != 0) {
+ ND_TCHECK_LEN(tptr, 12);
+ 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("\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);
+ }
+ return 1;
trunc:
- return 0;
+ return 0;
}
static void
bgp_capabilities_print(netdissect_options *ndo,
- const u_char *opt, int caps_len)
+ const u_char *opt, u_int caps_len)
{
- int cap_type, cap_len, tcap_len, cap_offset;
- int i = 0;
-
- while (i < caps_len) {
- ND_TCHECK2(opt[i], BGP_CAP_HEADER_SIZE);
- cap_type=opt[i];
- cap_len=opt[i+1];
- tcap_len=cap_len;
- ND_PRINT((ndo, "\n\t %s (%u), length: %u",
- tok2str(bgp_capcode_values, "Unknown",
- cap_type),
- cap_type,
- cap_len));
- ND_TCHECK2(opt[i+2], 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_16BITS(opt+i+2)),
- EXTRACT_16BITS(opt+i+2),
- tok2str(bgp_safi_values, "Unknown",
- opt[i+5]),
- opt[i+5]));
- break;
- case BGP_CAPCODE_RESTART:
- ND_PRINT((ndo, "\n\t\tRestart Flags: [%s], Restart Time %us",
- ((opt[i+2])&0x80) ? "R" : "none",
- EXTRACT_16BITS(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",
- tok2str(af_values,"Unknown",
- EXTRACT_16BITS(opt+i+cap_offset)),
- EXTRACT_16BITS(opt+i+cap_offset),
- tok2str(bgp_safi_values,"Unknown",
- opt[i+cap_offset+2]),
- opt[i+cap_offset+2],
- ((opt[i+cap_offset+3])&0x80) ? "yes" : "no" ));
- tcap_len-=4;
- cap_offset+=4;
- }
- break;
- case BGP_CAPCODE_RR:
- 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_32BITS(opt + i + 2))));
- }
- break;
- case BGP_CAPCODE_ADD_PATH:
- cap_offset=2;
- if (tcap_len == 0) {
- ND_PRINT((ndo, " (bogus)")); /* length */
- break;
- }
- while (tcap_len > 0) {
- if (tcap_len < 4) {
- ND_PRINT((ndo, "\n\t\t(invalid)"));
- break;
- }
- ND_PRINT((ndo, "\n\t\tAFI %s (%u), SAFI %s (%u), Send/Receive: %s",
- tok2str(af_values,"Unknown",EXTRACT_16BITS(opt+i+cap_offset)),
- EXTRACT_16BITS(opt+i+cap_offset),
- tok2str(bgp_safi_values,"Unknown",opt[i+cap_offset+2]),
- opt[i+cap_offset+2],
- tok2str(bgp_add_path_recvsend,"Bogus (0x%02x)",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));
- if (ndo->ndo_vflag <= 1)
- print_unknown_data(ndo, &opt[i+2], "\n\t\t", cap_len);
+ 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=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);
+ ND_TCHECK_LEN(opt + 2 + i, cap_len);
+ switch (cap_type) {
+ case BGP_CAPCODE_MP:
+ /* 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:
+ /* 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("\n\t\t AFI %s (%u), SAFI %s (%u), Forwarding state preserved: %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)),
+ ((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(" (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:
+ if (cap_len == 0) {
+ ND_PRINT(" (bogus)"); /* length */
+ break;
+ }
+ tcap_len=cap_len;
+ cap_offset=2;
+ while (tcap_len != 0) {
+ if (tcap_len < 4) {
+ nd_print_invalid(ndo);
break;
}
- 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;
+ 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("\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;
}
- return;
+ 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, int length)
+ const u_char *dat, u_int length)
{
- struct bgp_open bgpo;
- struct bgp_opt bgpopt;
- const u_char *opt;
- int i;
-
- ND_TCHECK2(dat[0], BGP_OPEN_SIZE);
- memcpy(&bgpo, dat, BGP_OPEN_SIZE);
-
- ND_PRINT((ndo, "\n\t Version %d, ", bgpo.bgpo_version));
- ND_PRINT((ndo, "my AS %s, ",
- as_printf(ndo, astostr, sizeof(astostr), ntohs(bgpo.bgpo_myas))));
- ND_PRINT((ndo, "Holdtime %us, ", ntohs(bgpo.bgpo_holdtime)));
- ND_PRINT((ndo, "ID %s", ipaddr_string(ndo, &bgpo.bgpo_id)));
- ND_PRINT((ndo, "\n\t Optional parameters, length: %u", bgpo.bgpo_optlen));
-
- /* some little sanity checking */
- if (length < bgpo.bgpo_optlen+BGP_OPEN_SIZE)
- return;
-
- /* ugly! */
- opt = &((const struct bgp_open *)dat)->bgpo_optlen;
- opt++;
-
- i = 0;
- while (i < bgpo.bgpo_optlen) {
- ND_TCHECK2(opt[i], BGP_OPT_SIZE);
- memcpy(&bgpopt, &opt[i], BGP_OPT_SIZE);
- if (i + 2 + bgpopt.bgpopt_len > bgpo.bgpo_optlen) {
- ND_PRINT((ndo, "\n\t Option %d, length: %u", bgpopt.bgpopt_type, bgpopt.bgpopt_len));
- break;
- }
-
- ND_PRINT((ndo, "\n\t Option %s (%u), length: %u",
- tok2str(bgp_opt_values,"Unknown",
- bgpopt.bgpopt_type),
- bgpopt.bgpopt_type,
- bgpopt.bgpopt_len));
-
- /* now let's decode the options we know*/
- switch(bgpopt.bgpopt_type) {
-
- case BGP_OPT_CAP:
- bgp_capabilities_print(ndo, &opt[i+BGP_OPT_SIZE],
- bgpopt.bgpopt_len);
- break;
-
- case BGP_OPT_AUTH:
- default:
- ND_PRINT((ndo, "\n\t no decoder for option %u",
- bgpopt.bgpopt_type));
- break;
- }
- i += BGP_OPT_SIZE + bgpopt.bgpopt_len;
- }
- return;
+ const struct bgp_open *bgp_open_header;
+ u_int optslen;
+ const struct bgp_opt *bgpopt;
+ const u_char *opt;
+ u_int i;
+
+ ND_TCHECK_LEN(dat, BGP_OPEN_SIZE);
+ if (length < BGP_OPEN_SIZE)
+ goto trunc;
+
+ bgp_open_header = (const struct bgp_open *)dat;
+
+ 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", ipaddr_string(ndo, 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;
+
+ i = 0;
+ while (i < optslen) {
+ uint8_t opt_type, opt_len;
+
+ ND_TCHECK_LEN(opt + i, BGP_OPT_SIZE);
+ if (length < BGP_OPT_SIZE + i)
+ goto trunc;
+ bgpopt = (const struct bgp_opt *)(opt + i);
+ 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("\n\t Option %u, length: %u, goes past the end of the options",
+ opt_type, opt_len);
+ break;
+ }
+
+ ND_PRINT("\n\t Option %s (%u), length: %u",
+ tok2str(bgp_opt_values,"Unknown",opt_type),
+ opt_type,
+ opt_len);
+
+ /* now let's decode the options we know*/
+ switch(opt_type) {
+
+ case BGP_OPT_CAP:
+ bgp_capabilities_print(ndo, opt + BGP_OPT_SIZE + i,
+ opt_len);
+ break;
+
+ case BGP_OPT_AUTH:
+ default:
+ 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)
{
- struct bgp bgp;
- const u_char *p;
- int withdrawn_routes_len;
- int len;
- int i;
-
- ND_TCHECK2(dat[0], BGP_SIZE);
- if (length < BGP_SIZE)
- goto trunc;
- memcpy(&bgp, dat, BGP_SIZE);
- p = dat + BGP_SIZE; /*XXX*/
- length -= BGP_SIZE;
-
- /* Unfeasible routes */
- ND_TCHECK2(p[0], 2);
- if (length < 2)
- goto trunc;
- withdrawn_routes_len = EXTRACT_16BITS(p);
- p += 2;
- length -= 2;
- if (withdrawn_routes_len) {
- /*
- * Without keeping state from the original NLRI message,
- * it's not possible to tell if this a v4 or v6 route,
- * so only try to decode it if we're not v6 enabled.
- */
- ND_TCHECK2(p[0], withdrawn_routes_len);
- if (length < withdrawn_routes_len)
- goto trunc;
- ND_PRINT((ndo, "\n\t Withdrawn routes: %d bytes", withdrawn_routes_len));
- p += withdrawn_routes_len;
- length -= withdrawn_routes_len;
- }
-
- ND_TCHECK2(p[0], 2);
- if (length < 2)
- goto trunc;
- len = EXTRACT_16BITS(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)"));
- return;
+ const u_char *p;
+ 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;
+ p = dat + BGP_SIZE;
+ length -= BGP_SIZE;
+
+ /* Unfeasible routes */
+ ND_TCHECK_2(p);
+ if (length < 2)
+ goto trunc;
+ withdrawn_routes_len = GET_BE_U_2(p);
+ p += 2;
+ length -= 2;
+ 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,
+ * so only try to decode it if we're not v6 enabled.
+ */
+ ND_TCHECK_LEN(p, withdrawn_routes_len);
+ if (length < withdrawn_routes_len)
+ goto trunc;
+ 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;
+ else if (wpfx == -3)
+ 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;
+ }
- if (len) {
- /* do something more useful!*/
- while (len) {
- int aflags, atype, alenlen, alen;
-
- ND_TCHECK2(p[0], 2);
- if (len < 2)
- goto trunc;
- if (length < 2)
- goto trunc;
- aflags = *p;
- atype = *(p + 1);
- p += 2;
- len -= 2;
- length -= 2;
- alenlen = bgp_attr_lenlen(aflags, p);
- ND_TCHECK2(p[0], alenlen);
- if (len < alenlen)
- goto trunc;
- if (length < alenlen)
- goto trunc;
- alen = bgp_attr_len(aflags, p);
- p += alenlen;
- len -= alenlen;
- length -= alenlen;
-
- ND_PRINT((ndo, "\n\t %s (%u), length: %u",
- tok2str(bgp_attr_values, "Unknown Attribute",
- atype),
- atype,
- alen));
-
- if (aflags) {
- ND_PRINT((ndo, ", Flags [%s%s%s%s",
- aflags & 0x80 ? "O" : "",
- aflags & 0x40 ? "T" : "",
- aflags & 0x20 ? "P" : "",
- aflags & 0x10 ? "E" : ""));
- if (aflags & 0xf)
- ND_PRINT((ndo, "+%x", aflags & 0xf));
- ND_PRINT((ndo, "]: "));
- }
- if (len < alen)
- goto trunc;
- if (length < alen)
- goto trunc;
- if (!bgp_attr_print(ndo, atype, p, alen))
- goto trunc;
- p += alen;
- len -= alen;
- length -= alen;
- }
- }
+ ND_TCHECK_2(p);
+ if (length < 2)
+ goto trunc;
+ len = GET_BE_U_2(p);
+ p += 2;
+ length -= 2;
- 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];
- i = decode_prefix4(ndo, p, length, buf, sizeof(buf));
- if (i == -1) {
- ND_PRINT((ndo, "\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));
- p += i;
- length -= i;
- }
- }
- }
- return;
+ if (withdrawn_routes_len == 0 && len == 0 && length == 0) {
+ /* No withdrawn routes, no path attributes, no NLRI */
+ ND_PRINT("\n\t End-of-Rib Marker (empty NLRI)");
+ return;
+ }
+
+ if (len) {
+ /* do something more useful!*/
+ while (len) {
+ uint8_t aflags, atype, alenlen;
+ uint16_t alen;
+
+ ND_TCHECK_2(p);
+ if (length < 2)
+ goto trunc;
+ 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 (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("\n\t %s (%u), length: %u",
+ tok2str(bgp_attr_values, "Unknown Attribute", atype),
+ atype,
+ alen);
+
+ if (aflags) {
+ ND_PRINT(", Flags [%s%s%s%s",
+ aflags & 0x80 ? "O" : "",
+ aflags & 0x40 ? "T" : "",
+ aflags & 0x20 ? "P" : "",
+ aflags & 0x10 ? "E" : "");
+ if (aflags & 0xf)
+ ND_PRINT("+%x", aflags & 0xf);
+ ND_PRINT("]: ");
+ }
+ if (len < alen) {
+ ND_PRINT(" [path attrs too short]");
+ p += len;
+ length -= len;
+ break;
+ }
+ if (length < alen)
+ goto trunc;
+ if (!bgp_attr_print(ndo, atype, p, alen, 0))
+ goto trunc;
+ p += alen;
+ len -= alen;
+ length -= alen;
+ }
+ }
+
+ if (length) {
+ 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("\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("\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)
{
- struct bgp_notification bgpn;
- const u_char *tptr;
- uint8_t shutdown_comm_length;
- uint8_t remainder_offset;
-
- ND_TCHECK2(dat[0], BGP_NOTIFICATION_SIZE);
- memcpy(&bgpn, dat, BGP_NOTIFICATION_SIZE);
-
- /* some little sanity checking */
- if (length<BGP_NOTIFICATION_SIZE)
- return;
-
- ND_PRINT((ndo, ", %s (%u)",
- tok2str(bgp_notify_major_values, "Unknown Error",
- bgpn.bgpn_major),
- bgpn.bgpn_major));
-
- switch (bgpn.bgpn_major) {
-
- case BGP_NOTIFY_MAJOR_MSG:
- ND_PRINT((ndo, ", subcode %s (%u)",
- tok2str(bgp_notify_minor_msg_values, "Unknown",
- bgpn.bgpn_minor),
- bgpn.bgpn_minor));
- break;
- case BGP_NOTIFY_MAJOR_OPEN:
- ND_PRINT((ndo, ", subcode %s (%u)",
- tok2str(bgp_notify_minor_open_values, "Unknown",
- bgpn.bgpn_minor),
- bgpn.bgpn_minor));
- break;
- case BGP_NOTIFY_MAJOR_UPDATE:
- ND_PRINT((ndo, ", subcode %s (%u)",
- tok2str(bgp_notify_minor_update_values, "Unknown",
- bgpn.bgpn_minor),
- bgpn.bgpn_minor));
- break;
- case BGP_NOTIFY_MAJOR_FSM:
- ND_PRINT((ndo, " subcode %s (%u)",
- tok2str(bgp_notify_minor_fsm_values, "Unknown",
- bgpn.bgpn_minor),
- bgpn.bgpn_minor));
- break;
- case BGP_NOTIFY_MAJOR_CAP:
- ND_PRINT((ndo, " subcode %s (%u)",
- tok2str(bgp_notify_minor_cap_values, "Unknown",
- bgpn.bgpn_minor),
- bgpn.bgpn_minor));
- break;
- case BGP_NOTIFY_MAJOR_CEASE:
- ND_PRINT((ndo, ", subcode %s (%u)",
- tok2str(bgp_notify_minor_cease_values, "Unknown",
- bgpn.bgpn_minor),
- bgpn.bgpn_minor));
-
- /* draft-ietf-idr-cease-subcode-02 mentions optionally 7 bytes
- * for the maxprefix subtype, which may contain AFI, SAFI and MAXPREFIXES
- */
- if(bgpn.bgpn_minor == BGP_NOTIFY_MINOR_CEASE_MAXPRFX && length >= BGP_NOTIFICATION_SIZE + 7) {
- tptr = dat + BGP_NOTIFICATION_SIZE;
- ND_TCHECK2(*tptr, 7);
- ND_PRINT((ndo, ", AFI %s (%u), SAFI %s (%u), Max Prefixes: %u",
- tok2str(af_values, "Unknown",
- EXTRACT_16BITS(tptr)),
- EXTRACT_16BITS(tptr),
- tok2str(bgp_safi_values, "Unknown", *(tptr+2)),
- *(tptr+2),
- EXTRACT_32BITS(tptr+3)));
- }
- /*
- * draft-ietf-idr-shutdown describes a method to send a communication
- * intended for human consumption regarding the Administrative Shutdown
- */
- if ((bgpn.bgpn_minor == BGP_NOTIFY_MINOR_CEASE_SHUT ||
- bgpn.bgpn_minor == BGP_NOTIFY_MINOR_CEASE_RESET) &&
- length >= BGP_NOTIFICATION_SIZE + 1) {
- tptr = dat + BGP_NOTIFICATION_SIZE;
- ND_TCHECK2(*tptr, 1);
- shutdown_comm_length = *(tptr);
- 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"));
- }
- else if (shutdown_comm_length == 0) {
- ND_PRINT((ndo, ", empty Shutdown Communication"));
- remainder_offset += 1;
- }
- /* a proper shutdown communication */
- else {
- ND_TCHECK2(*(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, "\""));
- 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)));
- hex_print(ndo, "\n\t\t", tptr + remainder_offset, length - (remainder_offset + BGP_NOTIFICATION_SIZE));
- }
- }
- break;
- default:
- break;
+ 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 = GET_U_1(bgp_notification_header->bgpn_major);
+ bgpn_minor = GET_U_1(bgp_notification_header->bgpn_minor);
+
+ ND_PRINT(", %s (%u)",
+ tok2str(bgp_notify_major_values, "Unknown Error",
+ bgpn_major),
+ bgpn_major);
+
+ switch (bgpn_major) {
+
+ case BGP_NOTIFY_MAJOR_MSG:
+ ND_PRINT(", subcode %s (%u)",
+ tok2str(bgp_notify_minor_msg_values, "Unknown",
+ bgpn_minor),
+ bgpn_minor);
+ break;
+ case BGP_NOTIFY_MAJOR_OPEN:
+ ND_PRINT(", subcode %s (%u)",
+ tok2str(bgp_notify_minor_open_values, "Unknown",
+ bgpn_minor),
+ bgpn_minor);
+ break;
+ case BGP_NOTIFY_MAJOR_UPDATE:
+ ND_PRINT(", subcode %s (%u)",
+ tok2str(bgp_notify_minor_update_values, "Unknown",
+ bgpn_minor),
+ bgpn_minor);
+ break;
+ case BGP_NOTIFY_MAJOR_FSM:
+ ND_PRINT(" subcode %s (%u)",
+ tok2str(bgp_notify_minor_fsm_values, "Unknown",
+ bgpn_minor),
+ bgpn_minor);
+ break;
+ case BGP_NOTIFY_MAJOR_CAP:
+ ND_PRINT(" subcode %s (%u)",
+ tok2str(bgp_notify_minor_cap_values, "Unknown",
+ bgpn_minor),
+ bgpn_minor);
+ break;
+ case BGP_NOTIFY_MAJOR_CEASE:
+ ND_PRINT(", subcode %s (%u)",
+ tok2str(bgp_notify_minor_cease_values, "Unknown",
+ bgpn_minor),
+ bgpn_minor);
+
+ /* draft-ietf-idr-cease-subcode-02 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(", 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
+ * 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 = GET_U_1(tptr);
+ 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(", invalid Shutdown Communication length");
+ }
+ else if (shutdown_comm_length == 0) {
+ ND_PRINT(", empty Shutdown Communication");
+ remainder_offset += 1;
+ }
+ /* a proper shutdown communication */
+ else {
+ ND_TCHECK_LEN(tptr + 1, shutdown_comm_length);
+ 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(", Data: (length: %u)", length - (remainder_offset + BGP_NOTIFICATION_SIZE));
+ hex_print(ndo, "\n\t\t", tptr + remainder_offset, length - (remainder_offset + BGP_NOTIFICATION_SIZE));
+ }
}
+ break;
+ default:
+ break;
+ }
- return;
+ 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;
+ const struct bgp_route_refresh *bgp_route_refresh_header;
- ND_TCHECK2(pptr[0], BGP_ROUTE_REFRESH_SIZE);
+ ND_TCHECK_LEN(pptr, BGP_ROUTE_REFRESH_SIZE);
- /* some little sanity checking */
- if (len<BGP_ROUTE_REFRESH_SIZE)
- return;
+ /* some little sanity checking */
+ if (len<BGP_ROUTE_REFRESH_SIZE)
+ return;
- bgp_route_refresh_header = (const struct bgp_route_refresh *)pptr;
+ bgp_route_refresh_header = (const struct bgp_route_refresh *)pptr;
- ND_PRINT((ndo, "\n\t AFI %s (%u), SAFI %s (%u)",
- tok2str(af_values,"Unknown",
- /* this stinks but the compiler pads the structure
- * weird */
- EXTRACT_16BITS(&bgp_route_refresh_header->afi)),
- EXTRACT_16BITS(&bgp_route_refresh_header->afi),
- tok2str(bgp_safi_values,"Unknown",
- bgp_route_refresh_header->safi),
- bgp_route_refresh_header->safi));
+ ND_PRINT("\n\t AFI %s (%u), SAFI %s (%u)",
+ tok2str(af_values,"Unknown",
+ GET_BE_U_2(bgp_route_refresh_header->afi)),
+ GET_BE_U_2(bgp_route_refresh_header->afi),
+ tok2str(bgp_safi_values,"Unknown",
+ GET_U_1(bgp_route_refresh_header->safi)),
+ GET_U_1(bgp_route_refresh_header->safi));
- if (ndo->ndo_vflag > 1) {
- ND_TCHECK2(*pptr, len);
- print_unknown_data(ndo, pptr, "\n\t ", len);
- }
+ if (ndo->ndo_vflag > 1) {
+ ND_TCHECK_LEN(pptr, len);
+ print_unknown_data(ndo, pptr, "\n\t ", len);
+ }
- return;
+ return;
trunc:
- ND_PRINT((ndo, "[|BGP]"));
+ nd_print_trunc(ndo);
}
static int
-bgp_header_print(netdissect_options *ndo,
- const u_char *dat, int length)
+bgp_pdu_print(netdissect_options *ndo,
+ const u_char *dat, u_int length)
{
- struct bgp bgp;
-
- ND_TCHECK2(dat[0], BGP_SIZE);
- memcpy(&bgp, dat, BGP_SIZE);
- ND_PRINT((ndo, "\n\t%s Message (%u), length: %u",
- tok2str(bgp_msg_values, "Unknown", bgp.bgp_type),
- bgp.bgp_type,
- length));
-
- switch (bgp.bgp_type) {
- case BGP_OPEN:
- bgp_open_print(ndo, dat, length);
- break;
- case BGP_UPDATE:
- bgp_update_print(ndo, dat, length);
- break;
- case BGP_NOTIFICATION:
- bgp_notification_print(ndo, dat, length);
- break;
- case BGP_KEEPALIVE:
- break;
- case BGP_ROUTE_REFRESH:
- bgp_route_refresh_print(ndo, dat, length);
- break;
- default:
- /* we have no decoder for the BGP message */
- ND_TCHECK2(*dat, length);
- ND_PRINT((ndo, "\n\t no Message %u decoder", bgp.bgp_type));
- print_unknown_data(ndo, dat, "\n\t ", length);
- break;
- }
- return 1;
+ const struct bgp *bgp_header;
+ uint8_t bgp_type;
+
+ ND_TCHECK_LEN(dat, BGP_SIZE);
+ bgp_header = (const struct bgp *)dat;
+ bgp_type = GET_U_1(bgp_header->bgp_type);
+
+ ND_PRINT("\n\t%s Message (%u), length: %u",
+ tok2str(bgp_msg_values, "Unknown", bgp_type),
+ bgp_type,
+ length);
+
+ switch (bgp_type) {
+ case BGP_OPEN:
+ bgp_open_print(ndo, dat, length);
+ break;
+ case BGP_UPDATE:
+ bgp_update_print(ndo, dat, length);
+ break;
+ case BGP_NOTIFICATION:
+ bgp_notification_print(ndo, dat, length);
+ break;
+ case BGP_KEEPALIVE:
+ break;
+ case BGP_ROUTE_REFRESH:
+ bgp_route_refresh_print(ndo, dat, length);
+ break;
+ default:
+ /* we have no decoder for the BGP message */
+ ND_TCHECK_LEN(dat, length);
+ 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]"));
- return 0;
+ 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 *start;
- const u_char marker[] = {
- 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
- 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
- };
- struct bgp bgp;
- uint16_t hlen;
-
- ep = dat + length;
- if (ndo->ndo_snapend < dat + length)
- ep = ndo->ndo_snapend;
-
- ND_PRINT((ndo, ": BGP"));
-
- if (ndo->ndo_vflag < 1) /* lets be less chatty */
- return;
+ const u_char *p;
+ const u_char *ep = ndo->ndo_snapend;
+ const u_char *start;
+ const u_char marker[] = {
+ 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
+ 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
+ };
+ const struct bgp *bgp_header;
+ uint16_t hlen;
+
+ ndo->ndo_protocol = "bgp";
+ ND_PRINT(": BGP");
+
+ if (ndo->ndo_vflag < 1) /* lets be less chatty */
+ return;
- p = dat;
- start = p;
- while (p < ep) {
- if (!ND_TTEST2(p[0], 1))
- break;
- if (p[0] != 0xff) {
- p++;
- continue;
- }
-
- if (!ND_TTEST2(p[0], sizeof(marker)))
- break;
- if (memcmp(p, marker, sizeof(marker)) != 0) {
- p++;
- continue;
- }
-
- /* found BGP header */
- ND_TCHECK2(p[0], BGP_SIZE); /*XXX*/
- memcpy(&bgp, p, BGP_SIZE);
-
- if (start != p)
- ND_PRINT((ndo, " [|BGP]"));
-
- hlen = ntohs(bgp.bgp_len);
- if (hlen < BGP_SIZE) {
- ND_PRINT((ndo, "\n[|BGP Bogus header length %u < %u]", hlen,
- BGP_SIZE));
- break;
- }
-
- if (ND_TTEST2(p[0], hlen)) {
- if (!bgp_header_print(ndo, p, hlen))
- return;
- p += hlen;
- start = p;
- } else {
- ND_PRINT((ndo, "\n[|BGP %s]",
- tok2str(bgp_msg_values,
- "Unknown Message Type",
- bgp.bgp_type)));
- break;
- }
- }
+ p = dat;
+ start = p;
+ while (p < ep) {
+ if (!ND_TTEST_1(p))
+ break;
+ if (GET_U_1(p) != 0xff) {
+ p++;
+ continue;
+ }
+
+ if (!ND_TTEST_LEN(p, sizeof(marker)))
+ break;
+ if (memcmp(p, marker, sizeof(marker)) != 0) {
+ p++;
+ continue;
+ }
- return;
+ /* found BGP header */
+ ND_TCHECK_LEN(p, BGP_SIZE);
+ bgp_header = (const struct bgp *)p;
+
+ if (start != p)
+ nd_print_trunc(ndo);
+
+ hlen = GET_BE_U_2(bgp_header->bgp_len);
+ if (hlen < BGP_SIZE) {
+ ND_PRINT("\nmessage length %u < %u", hlen, BGP_SIZE);
+ nd_print_invalid(ndo);
+ break;
+ }
+
+ if (ND_TTEST_LEN(p, hlen)) {
+ if (!bgp_pdu_print(ndo, p, hlen))
+ return;
+ p += hlen;
+ start = p;
+ } else {
+ ND_PRINT("\n[|BGP %s]",
+ tok2str(bgp_msg_values,
+ "Unknown Message 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