* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
+ *
+ * complete BGP support.
*/
+#define NETDISSECT_REWORKED
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
-#ifndef lint
-static const char rcsid[] =
- "@(#) $Header: /tcpdump/master/tcpdump/print-bgp.c,v 1.46 2002-08-06 04:42:04 guy Exp $";
-#endif
-
#include <tcpdump-stdinc.h>
#include <stdio.h>
#include "interface.h"
#include "addrtoname.h"
#include "extract.h"
+#include "af.h"
+#include "l2vpn.h"
struct bgp {
- u_int8_t bgp_marker[16];
- u_int16_t bgp_len;
- u_int8_t bgp_type;
+ uint8_t bgp_marker[16];
+ uint16_t bgp_len;
+ uint8_t bgp_type;
};
#define BGP_SIZE 19 /* unaligned */
#define BGP_KEEPALIVE 4
#define BGP_ROUTE_REFRESH 5
-static struct tok bgp_msg_values[] = {
+static const struct tok bgp_msg_values[] = {
{ BGP_OPEN, "Open"},
{ BGP_UPDATE, "Update"},
{ BGP_NOTIFICATION, "Notification"},
};
struct bgp_open {
- u_int8_t bgpo_marker[16];
- u_int16_t bgpo_len;
- u_int8_t bgpo_type;
- u_int8_t bgpo_version;
- u_int16_t bgpo_myas;
- u_int16_t bgpo_holdtime;
- u_int32_t bgpo_id;
- u_int8_t bgpo_optlen;
+ 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 */
};
#define BGP_OPEN_SIZE 29 /* unaligned */
struct bgp_opt {
- u_int8_t bgpopt_type;
- u_int8_t bgpopt_len;
+ uint8_t bgpopt_type;
+ 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 */
struct bgp_notification {
- u_int8_t bgpn_marker[16];
- u_int16_t bgpn_len;
- u_int8_t bgpn_type;
- u_int8_t bgpn_major;
- u_int8_t bgpn_minor;
- /* data should follow */
+ uint8_t bgpn_marker[16];
+ uint16_t bgpn_len;
+ uint8_t bgpn_type;
+ uint8_t bgpn_major;
+ uint8_t bgpn_minor;
};
#define BGP_NOTIFICATION_SIZE 21 /* unaligned */
struct bgp_route_refresh {
- u_int8_t bgp_marker[16];
- u_int16_t len;
- u_int8_t type;
- u_int8_t afi[2]; /* the compiler messes this structure up */
- u_int8_t res; /* when doing misaligned sequences of int8 and int16 */
- u_int8_t safi; /* afi should be int16 - so we have to access it using */
-}; /* EXTRACT_16BITS(&bgp_route_refresh->afi) (sigh) */
+ 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) */
#define BGP_ROUTE_REFRESH_SIZE 23
-struct bgp_attr {
- u_int8_t bgpa_flags;
- u_int8_t bgpa_type;
- union {
- u_int8_t len;
- u_int16_t elen;
- } bgpa_len;
-#define bgp_attr_len(p) \
- (((p)->bgpa_flags & 0x10) ? \
- ntohs((p)->bgpa_len.elen) : (p)->bgpa_len.len)
-#define bgp_attr_off(p) \
- (((p)->bgpa_flags & 0x10) ? 4 : 3)
-};
+#define bgp_attr_lenlen(flags, p) \
+ (((flags) & 0x10) ? 2 : 1)
+#define bgp_attr_len(flags, p) \
+ (((flags) & 0x10) ? EXTRACT_16BITS(p) : *(p))
#define BGPTYPE_ORIGIN 1
#define BGPTYPE_AS_PATH 2
#define BGPTYPE_MP_REACH_NLRI 14 /* RFC2283 */
#define BGPTYPE_MP_UNREACH_NLRI 15 /* RFC2283 */
#define BGPTYPE_EXTD_COMMUNITIES 16 /* draft-ietf-idr-bgp-ext-communities */
+#define BGPTYPE_AS4_PATH 17 /* RFC4893 */
+#define BGPTYPE_AGGREGATOR4 18 /* RFC4893 */
+#define BGPTYPE_PMSI_TUNNEL 22 /* draft-ietf-l3vpn-2547bis-mcast-bgp-02.txt */
+#define BGPTYPE_ATTR_SET 128 /* draft-marques-ppvpn-ibgp */
-static struct tok bgp_attr_values[] = {
+#define BGP_MP_NLRI_MINSIZE 3 /* End of RIB Marker detection */
+
+static const struct tok bgp_attr_values[] = {
{ BGPTYPE_ORIGIN, "Origin"},
{ BGPTYPE_AS_PATH, "AS Path"},
+ { BGPTYPE_AS4_PATH, "AS4 Path"},
{ BGPTYPE_NEXT_HOP, "Next Hop"},
{ BGPTYPE_MULTI_EXIT_DISC, "Multi Exit Discriminator"},
{ BGPTYPE_LOCAL_PREF, "Local Preference"},
{ BGPTYPE_ATOMIC_AGGREGATE, "Atomic Aggregate"},
{ BGPTYPE_AGGREGATOR, "Aggregator"},
+ { BGPTYPE_AGGREGATOR4, "Aggregator4"},
{ BGPTYPE_COMMUNITIES, "Community"},
{ BGPTYPE_ORIGINATOR_ID, "Originator ID"},
{ BGPTYPE_CLUSTER_LIST, "Cluster List"},
{ BGPTYPE_MP_REACH_NLRI, "Multi-Protocol Reach NLRI"},
{ BGPTYPE_MP_UNREACH_NLRI, "Multi-Protocol Unreach NLRI"},
{ BGPTYPE_EXTD_COMMUNITIES, "Extended Community"},
+ { BGPTYPE_PMSI_TUNNEL, "PMSI Tunnel"},
+ { BGPTYPE_ATTR_SET, "Attribute Set"},
{ 255, "Reserved for development"},
{ 0, NULL}
};
+#define BGP_AS_SET 1
+#define BGP_AS_SEQUENCE 2
+#define BGP_CONFED_AS_SEQUENCE 3 /* draft-ietf-idr-rfc3065bis-01 */
+#define BGP_CONFED_AS_SET 4 /* draft-ietf-idr-rfc3065bis-01 */
+
+#define BGP_AS_SEG_TYPE_MIN BGP_AS_SET
+#define BGP_AS_SEG_TYPE_MAX BGP_CONFED_AS_SET
+
+static const struct tok bgp_as_path_segment_open_values[] = {
+ { BGP_AS_SEQUENCE, ""},
+ { BGP_AS_SET, "{ "},
+ { BGP_CONFED_AS_SEQUENCE, "( "},
+ { BGP_CONFED_AS_SET, "({ "},
+ { 0, NULL}
+};
+
+static const struct tok bgp_as_path_segment_close_values[] = {
+ { BGP_AS_SEQUENCE, ""},
+ { BGP_AS_SET, "}"},
+ { BGP_CONFED_AS_SEQUENCE, ")"},
+ { BGP_CONFED_AS_SET, "})"},
+ { 0, NULL}
+};
+
#define BGP_OPT_AUTH 1
#define BGP_OPT_CAP 2
-static struct tok bgp_opt_values[] = {
+static const struct tok bgp_opt_values[] = {
{ BGP_OPT_AUTH, "Authentication Information"},
{ BGP_OPT_CAP, "Capabilities Advertisement"},
{ 0, NULL}
#define BGP_CAPCODE_MP 1
#define BGP_CAPCODE_RR 2
+#define BGP_CAPCODE_ORF 3 /* XXX */
+#define BGP_CAPCODE_RESTART 64 /* draft-ietf-idr-restart-05 */
+#define BGP_CAPCODE_AS_NEW 65 /* XXX */
+#define BGP_CAPCODE_DYN_CAP 67 /* XXX */
#define BGP_CAPCODE_RR_CISCO 128
-static struct tok bgp_capcode_values[] = {
+static const struct tok bgp_capcode_values[] = {
{ BGP_CAPCODE_MP, "Multiprotocol Extensions"},
{ BGP_CAPCODE_RR, "Route Refresh"},
+ { BGP_CAPCODE_ORF, "Cooperative Route Filtering"},
+ { BGP_CAPCODE_RESTART, "Graceful Restart"},
+ { BGP_CAPCODE_AS_NEW, "32-Bit AS Number"},
+ { BGP_CAPCODE_DYN_CAP, "Dynamic Capability"},
{ BGP_CAPCODE_RR_CISCO, "Route Refresh (Cisco)"},
{ 0, NULL}
};
#define BGP_NOTIFY_MAJOR_HOLDTIME 4
#define BGP_NOTIFY_MAJOR_FSM 5
#define BGP_NOTIFY_MAJOR_CEASE 6
+#define BGP_NOTIFY_MAJOR_CAP 7
-static struct tok bgp_notify_major_values[] = {
+static const struct tok bgp_notify_major_values[] = {
{ BGP_NOTIFY_MAJOR_MSG, "Message Header Error"},
{ BGP_NOTIFY_MAJOR_OPEN, "OPEN Message Error"},
{ BGP_NOTIFY_MAJOR_UPDATE, "UPDATE Message Error"},
{ BGP_NOTIFY_MAJOR_HOLDTIME,"Hold Timer Expired"},
{ BGP_NOTIFY_MAJOR_FSM, "Finite State Machine Error"},
{ BGP_NOTIFY_MAJOR_CEASE, "Cease"},
+ { BGP_NOTIFY_MAJOR_CAP, "Capability Message Error"},
+ { 0, NULL}
+};
+
+/* draft-ietf-idr-cease-subcode-02 */
+#define BGP_NOTIFY_MINOR_CEASE_MAXPRFX 1
+static const struct tok bgp_notify_minor_cease_values[] = {
+ { BGP_NOTIFY_MINOR_CEASE_MAXPRFX, "Maximum Number of Prefixes Reached"},
+ { 2, "Administratively Shutdown"},
+ { 3, "Peer Unconfigured"},
+ { 4, "Administratively Reset"},
+ { 5, "Connection Rejected"},
+ { 6, "Other Configuration Change"},
+ { 7, "Connection Collision Resolution"},
{ 0, NULL}
};
-static struct tok bgp_notify_minor_msg_values[] = {
+static const struct tok bgp_notify_minor_msg_values[] = {
{ 1, "Connection Not Synchronized"},
{ 2, "Bad Message Length"},
{ 3, "Bad Message Type"},
{ 0, NULL}
};
-static struct tok bgp_notify_minor_open_values[] = {
+static const struct tok bgp_notify_minor_open_values[] = {
{ 1, "Unsupported Version Number"},
{ 2, "Bad Peer AS"},
{ 3, "Bad BGP Identifier"},
{ 4, "Unsupported Optional Parameter"},
{ 5, "Authentication Failure"},
{ 6, "Unacceptable Hold Time"},
+ { 7, "Capability Message Error"},
{ 0, NULL}
};
-static struct tok bgp_notify_minor_update_values[] = {
+static const struct tok bgp_notify_minor_update_values[] = {
{ 1, "Malformed Attribute List"},
{ 2, "Unrecognized Well-known Attribute"},
{ 3, "Missing Well-known Attribute"},
{ 0, NULL}
};
-static struct tok bgp_origin_values[] = {
+static const struct tok bgp_notify_minor_cap_values[] = {
+ { 1, "Invalid Action Value" },
+ { 2, "Invalid Capability Length" },
+ { 3, "Malformed Capability Value" },
+ { 4, "Unsupported Capability Code" },
+ { 0, NULL }
+};
+
+static const struct tok bgp_origin_values[] = {
{ 0, "IGP"},
{ 1, "EGP"},
{ 2, "Incomplete"},
{ 0, NULL}
};
+#define BGP_PMSI_TUNNEL_RSVP_P2MP 1
+#define BGP_PMSI_TUNNEL_LDP_P2MP 2
+#define BGP_PMSI_TUNNEL_PIM_SSM 3
+#define BGP_PMSI_TUNNEL_PIM_SM 4
+#define BGP_PMSI_TUNNEL_PIM_BIDIR 5
+#define BGP_PMSI_TUNNEL_INGRESS 6
+#define BGP_PMSI_TUNNEL_LDP_MP2MP 7
+
+static const struct tok bgp_pmsi_tunnel_values[] = {
+ { BGP_PMSI_TUNNEL_RSVP_P2MP, "RSVP-TE P2MP LSP"},
+ { BGP_PMSI_TUNNEL_LDP_P2MP, "LDP P2MP LSP"},
+ { BGP_PMSI_TUNNEL_PIM_SSM, "PIM-SSM Tree"},
+ { BGP_PMSI_TUNNEL_PIM_SM, "PIM-SM Tree"},
+ { BGP_PMSI_TUNNEL_PIM_BIDIR, "PIM-Bidir Tree"},
+ { BGP_PMSI_TUNNEL_INGRESS, "Ingress Replication"},
+ { BGP_PMSI_TUNNEL_LDP_MP2MP, "LDP MP2MP LSP"},
+ { 0, NULL}
+};
+
+static const struct tok bgp_pmsi_flag_values[] = {
+ { 0x01, "Leaf Information required"},
+ { 0, NULL}
+};
+
+
/* Subsequent address family identifier, RFC2283 section 7 */
#define SAFNUM_RES 0
#define SAFNUM_UNICAST 1
#define SAFNUM_UNIMULTICAST 3
/* labeled BGP RFC3107 */
#define SAFNUM_LABUNICAST 4
+/* draft-ietf-l3vpn-2547bis-mcast-bgp-02.txt */
+#define SAFNUM_MULTICAST_VPN 5
+#define SAFNUM_TUNNEL 64 /* XXX */
+#define SAFNUM_VPLS 65 /* XXX */
+/* draft-nalawade-idr-mdt-safi-03 */
+#define SAFNUM_MDT 66
/* Section 4.3.4 of draft-rosen-rfc2547bis-03.txt */
#define SAFNUM_VPNUNICAST 128
#define SAFNUM_VPNMULTICAST 129
#define SAFNUM_VPNUNIMULTICAST 130
+/* draft-marques-ppvpn-rt-constrain-01.txt */
+#define SAFNUM_RT_ROUTING_INFO 132
#define BGP_VPN_RD_LEN 8
-static struct tok bgp_safi_values[] = {
+static const struct tok bgp_safi_values[] = {
{ SAFNUM_RES, "Reserved"},
{ SAFNUM_UNICAST, "Unicast"},
{ SAFNUM_MULTICAST, "Multicast"},
{ SAFNUM_UNIMULTICAST, "Unicast+Multicast"},
{ SAFNUM_LABUNICAST, "labeled Unicast"},
+ { SAFNUM_TUNNEL, "Tunnel"},
+ { SAFNUM_VPLS, "VPLS"},
+ { SAFNUM_MDT, "MDT"},
{ SAFNUM_VPNUNICAST, "labeled VPN Unicast"},
{ SAFNUM_VPNMULTICAST, "labeled VPN Multicast"},
{ SAFNUM_VPNUNIMULTICAST, "labeled VPN Unicast+Multicast"},
+ { SAFNUM_RT_ROUTING_INFO, "Route Target Routing Information"},
+ { SAFNUM_MULTICAST_VPN, "Multicast VPN"},
{ 0, NULL }
};
#define BGP_COMMUNITY_NO_ADVERT 0xffffff02
#define BGP_COMMUNITY_NO_EXPORT_SUBCONFED 0xffffff03
-/* RFC1700 address family numbers */
-#define AFNUM_INET 1
-#define AFNUM_INET6 2
-#define AFNUM_NSAP 3
-#define AFNUM_HDLC 4
-#define AFNUM_BBN1822 5
-#define AFNUM_802 6
-#define AFNUM_E163 7
-#define AFNUM_E164 8
-#define AFNUM_F69 9
-#define AFNUM_X121 10
-#define AFNUM_IPX 11
-#define AFNUM_ATALK 12
-#define AFNUM_DECNET 13
-#define AFNUM_BANYAN 14
-#define AFNUM_E164NSAP 15
-/* draft-kompella-ppvpn-l2vpn */
-#define AFNUM_L2VPN 196 /* still to be approved by IANA */
-
-static struct tok bgp_afi_values[] = {
- { 0, "Reserved"},
- { AFNUM_INET, "IPv4"},
- { AFNUM_INET6, "IPv6"},
- { AFNUM_NSAP, "NSAP"},
- { AFNUM_HDLC, "HDLC"},
- { AFNUM_BBN1822, "BBN 1822"},
- { AFNUM_802, "802"},
- { AFNUM_E163, "E.163"},
- { AFNUM_E164, "E.164"},
- { AFNUM_F69, "F.69"},
- { AFNUM_X121, "X.121"},
- { AFNUM_IPX, "Novell IPX"},
- { AFNUM_ATALK, "Appletalk"},
- { AFNUM_DECNET, "Decnet IV"},
- { AFNUM_BANYAN, "Banyan Vines"},
- { AFNUM_E164NSAP, "E.164 with NSAP subaddress"},
- { AFNUM_L2VPN, "Layer-2 VPN"},
+/* Extended community type - draft-ietf-idr-bgp-ext-communities-05 */
+#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_RO_0 0x0003 /* Route Origin,Format AS(2bytes):AN(4bytes) */
+#define BGP_EXT_COM_RO_1 0x0103 /* Route Origin,Format IP address:AN(2bytes) */
+#define BGP_EXT_COM_RO_2 0x0203 /* Route Origin,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_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_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_L2INFO 0x800a /* draft-kompella-ppvpn-l2vpn */
+
+#define BGP_EXT_COM_SOURCE_AS 0x0009 /* RFC-ietf-l3vpn-2547bis-mcast-bgp-08.txt */
+#define BGP_EXT_COM_VRF_RT_IMP 0x010b /* RFC-ietf-l3vpn-2547bis-mcast-bgp-08.txt */
+#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
+#define BGP_EXT_COM_EIGRP_EXT_REMPROTO_REMMETRIC 0x8805
+
+static const struct tok bgp_extd_comm_flag_values[] = {
+ { 0x8000, "vendor-specific"},
+ { 0x4000, "non-transitive"},
{ 0, NULL},
};
-static struct tok bgp_extd_comm_subtype_values[] = {
- { 2, "target"},
- { 3, "origin"},
- { 4, "link-BW"},
- { 10, "layer2-info"},
+static const struct tok bgp_extd_comm_subtype_values[] = {
+ { BGP_EXT_COM_RT_0, "target"},
+ { BGP_EXT_COM_RT_1, "target"},
+ { BGP_EXT_COM_RT_2, "target"},
+ { BGP_EXT_COM_RO_0, "origin"},
+ { BGP_EXT_COM_RO_1, "origin"},
+ { BGP_EXT_COM_RO_2, "origin"},
+ { BGP_EXT_COM_LINKBAND, "link-BW"},
+ { BGP_EXT_COM_VPN_ORIGIN, "ospf-domain"},
+ { BGP_EXT_COM_VPN_ORIGIN2, "ospf-domain"},
+ { BGP_EXT_COM_VPN_ORIGIN3, "ospf-domain"},
+ { 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_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_SOURCE_AS, "source-AS" },
+ { BGP_EXT_COM_VRF_RT_IMP, "vrf-route-import"},
+ { BGP_EXT_COM_L2VPN_RT_0, "l2vpn-id"},
+ { BGP_EXT_COM_L2VPN_RT_1, "l2vpn-id"},
{ 0, NULL},
};
-static struct tok bgp_l2vpn_encaps_values[] = {
- { 0, "Reserved"},
- { 1, "Frame Relay"},
- { 2, "ATM AAL5 VCC transport"},
- { 3, "ATM transparent cell transport"},
- { 4, "Ethernet VLAN"},
- { 5, "Ethernet"},
- { 6, "Cisco-HDLC"},
- { 7, "PPP"},
- { 8, "CEM"},
- { 9, "ATM VCC cell transport"},
- { 10, "ATM VPC cell transport"},
- { 11, "MPLS"},
- { 12, "VPLS"},
- { 64, "IP-interworking"},
- { 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 */
+#define BGP_OSPF_RTYPE_SUM 3 /* OSPF Summary LSA */
+#define BGP_OSPF_RTYPE_EXT 5 /* OSPF External LSA, note that ASBR doesn't apply to MPLS-VPN */
+#define BGP_OSPF_RTYPE_NSSA 7 /* OSPF NSSA External*/
+#define BGP_OSPF_RTYPE_SHAM 129 /* OSPF-MPLS-VPN Sham link */
+#define BGP_OSPF_RTYPE_METRIC_TYPE 0x1 /* LSB of RTYPE Options Field */
+
+static const struct tok bgp_extd_comm_ospf_rtype_values[] = {
+ { BGP_OSPF_RTYPE_RTR, "Router" },
+ { BGP_OSPF_RTYPE_NET, "Network" },
+ { BGP_OSPF_RTYPE_SUM, "Summary" },
+ { BGP_OSPF_RTYPE_EXT, "External" },
+ { BGP_OSPF_RTYPE_NSSA,"NSSA External" },
+ { BGP_OSPF_RTYPE_SHAM,"MPLS-VPN Sham" },
+ { 0, NULL },
};
-static int
-decode_prefix4(const u_char *pptr, char *buf, u_int buflen)
+#define TOKBUFSIZE 128
+static char astostr[20];
+
+/*
+ * as_printf
+ *
+ * Convert an AS number into a string and return string pointer.
+ *
+ * Depending on bflag is set or not, AS number is converted into ASDOT notation
+ * or plain number notation.
+ *
+ */
+static char *
+as_printf(netdissect_options *ndo,
+ char *str, int 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;
+}
+
+#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)
{
struct in_addr addr;
- u_int plen;
+ u_int plen, plenbytes;
+ ND_TCHECK(pptr[0]);
+ ITEMCHECK(1);
plen = pptr[0];
- if (plen < 0 || 32 < plen)
+ if (32 < plen)
return -1;
+ itemlen -= 1;
memset(&addr, 0, sizeof(addr));
- memcpy(&addr, &pptr[1], (plen + 7) / 8);
+ plenbytes = (plen + 7) / 8;
+ ND_TCHECK2(pptr[1], plenbytes);
+ ITEMCHECK(plenbytes);
+ memcpy(&addr, &pptr[1], plenbytes);
if (plen % 8) {
- ((u_char *)&addr)[(plen + 7) / 8 - 1] &=
+ ((u_char *)&addr)[plenbytes - 1] &=
((0xff00 >> (plen % 8)) & 0xff);
}
- snprintf(buf, buflen, "%s/%d", getname((u_char *)&addr), plen);
- return 1 + (plen + 7) / 8;
+ snprintf(buf, buflen, "%s/%d", getname(ndo, (u_char *)&addr), plen);
+ return 1 + plenbytes;
+
+trunc:
+ return -2;
+
+badtlv:
+ return -3;
}
static int
-decode_labeled_prefix4(const u_char *pptr, char *buf, u_int buflen)
+decode_labeled_prefix4(netdissect_options *ndo,
+ const u_char *pptr, u_int itemlen, char *buf, u_int buflen)
{
struct in_addr addr;
- u_int plen;
+ 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
stacked labels in a a single BGP message
*/
+ if (24 > plen)
+ return -1;
+
plen-=24; /* adjust prefixlen - labellength */
- if (plen < 0 || 32 < plen)
+ if (32 < plen)
return -1;
+ itemlen -= 4;
memset(&addr, 0, sizeof(addr));
- memcpy(&addr, &pptr[4], (plen + 7) / 8);
+ plenbytes = (plen + 7) / 8;
+ ND_TCHECK2(pptr[4], plenbytes);
+ ITEMCHECK(plenbytes);
+ memcpy(&addr, &pptr[4], plenbytes);
if (plen % 8) {
- ((u_char *)&addr)[(plen + 7) / 8 - 1] &=
+ ((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",
- getname((u_char *)&addr),
+ getname(ndo, (u_char *)&addr),
plen,
EXTRACT_24BITS(pptr+1)>>4,
((pptr[3]&1)==0) ? "(BOGUS: Bottom of Stack NOT set!)" : "(bottom)" );
- return 4 + (plen + 7) / 8;
-}
+ return 4 + plenbytes;
+trunc:
+ return -2;
+
+badtlv:
+ return -3;
+}
+/*
+ * bgp_vpn_ip_print
+ *
+ * print an ipv4 or ipv6 address into a buffer dependend on address length.
+ */
static char *
-bgp_vpn_rd_print (const u_char *pptr) {
+bgp_vpn_ip_print(netdissect_options *ndo,
+ const u_char *pptr, u_int addr_length) {
- /* allocate space for the following string
- * xxx.xxx.xxx.xxx:xxxxx
- * 21 bytes plus one termination byte */
- static char rd[22];
+ /* worst case string is s fully formatted v6 address */
+ static char addr[sizeof("1234:5678:89ab:cdef:1234:5678:89ab:cdef")];
+ char *pos = addr;
+
+ switch(addr_length) {
+ case (sizeof(struct in_addr) << 3): /* 32 */
+ ND_TCHECK2(pptr[0], sizeof(struct in_addr));
+ snprintf(pos, sizeof(addr), "%s", ipaddr_string(ndo, pptr));
+ break;
+#ifdef INET6
+ case (sizeof(struct in6_addr) << 3): /* 128 */
+ ND_TCHECK2(pptr[0], sizeof(struct in6_addr));
+ snprintf(pos, sizeof(addr), "%s", ip6addr_string(ndo, pptr));
+ break;
+#endif
+ default:
+ snprintf(pos, sizeof(addr), "bogus address length %u", addr_length);
+ break;
+ }
+ pos += strlen(pos);
+
+trunc:
+ *(pos) = '\0';
+ return (addr);
+}
+
+/*
+ * bgp_vpn_sg_print
+ *
+ * print an multicast s,g entry into a buffer.
+ * the s,g entry is encoded like this.
+ *
+ * +-----------------------------------+
+ * | Multicast Source Length (1 octet) |
+ * +-----------------------------------+
+ * | Multicast Source (Variable) |
+ * +-----------------------------------+
+ * | Multicast Group Length (1 octet) |
+ * +-----------------------------------+
+ * | Multicast Group (Variable) |
+ * +-----------------------------------+
+ *
+ * return the number of bytes read from the wire.
+ */
+static int
+bgp_vpn_sg_print(netdissect_options *ndo,
+ const u_char *pptr, char *buf, u_int 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++;
+
+ /* Source address */
+ ND_TCHECK2(pptr[0], (addr_length >> 3));
+ total_length += (addr_length >> 3) + 1;
+ offset = strlen(buf);
+ if (addr_length) {
+ snprintf(buf + offset, buflen - offset, ", Source %s",
+ 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++;
+
+ /* Group address */
+ ND_TCHECK2(pptr[0], (addr_length >> 3));
+ total_length += (addr_length >> 3) + 1;
+ offset = strlen(buf);
+ if (addr_length) {
+ snprintf(buf + offset, buflen - offset, ", Group %s",
+ bgp_vpn_ip_print(ndo, pptr, addr_length));
+ pptr += (addr_length >> 3);
+ }
+
+trunc:
+ return (total_length);
+}
+
+
+/* RDs and RTs share the same semantics
+ * we use bgp_vpn_rd_print for
+ * printing route targets inside a NLRI */
+char *
+bgp_vpn_rd_print(netdissect_options *ndo,
+ const u_char *pptr) {
+
+ /* allocate space for the largest possible string */
+ static char rd[sizeof("xxxxxxxxxx:xxxxx (xxx.xxx.xxx.xxx:xxxxx)")];
char *pos = rd;
/* ok lets load the RD format */
switch (EXTRACT_16BITS(pptr)) {
- /* AS:IP-address fmt*/
+
+ /* 2-byte-AS:number fmt*/
case 0:
- pos+=sprintf(pos, "%u:%u.%u.%u.%u",
- EXTRACT_16BITS(pptr+2),
- *(pptr+4),
- *(pptr+5),
- *(pptr+6),
- *(pptr+7));
+ 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));
break;
/* IP-address:AS fmt*/
+
case 1:
- pos+=sprintf(pos, "%u.%u.%u.%u:%u",
- *(pptr+2),
- *(pptr+3),
- *(pptr+4),
- *(pptr+5),
- EXTRACT_16BITS(pptr+6));
+ snprintf(pos, sizeof(rd) - (pos - rd), "%u.%u.%u.%u:%u",
+ *(pptr+2), *(pptr+3), *(pptr+4), *(pptr+5), EXTRACT_16BITS(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));
break;
default:
- pos+=sprintf(pos, "unknown RD format");
+ snprintf(pos, sizeof(rd) - (pos - rd), "unknown RD format");
break;
}
+ pos += strlen(pos);
*(pos) = '\0';
return (rd);
}
static int
-decode_labeled_vpn_prefix4(const u_char *pptr, char *buf, u_int buflen)
+decode_rt_routing_info(netdissect_options *ndo,
+ const u_char *pptr, char *buf, u_int buflen)
+{
+ uint8_t route_target[8];
+ u_int plen;
+
+ ND_TCHECK(pptr[0]);
+ plen = pptr[0]; /* get prefix length */
+
+ if (0 == plen)
+ return 1; /* default route target */
+
+ if (32 > plen)
+ return -1;
+
+ plen-=32; /* adjust prefix length */
+
+ if (64 < plen)
+ return -1;
+
+ 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));
+
+ return 5 + (plen + 7) / 8;
+
+trunc:
+ return -2;
+}
+
+static int
+decode_labeled_vpn_prefix4(netdissect_options *ndo,
+ const u_char *pptr, char *buf, u_int buflen)
{
struct in_addr addr;
u_int plen;
+ ND_TCHECK(pptr[0]);
plen = pptr[0]; /* get prefix length */
+ if ((24+64) > plen)
+ return -1;
+
plen-=(24+64); /* adjust prefixlen - labellength - RD len*/
- if (plen < 0 || 32 < plen)
+ 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] &=
}
/* 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(pptr+4),
- getname((u_char *)&addr),
+ bgp_vpn_rd_print(ndo, pptr+4),
+ getname(ndo, (u_char *)&addr),
plen,
EXTRACT_24BITS(pptr+1)>>4,
((pptr[3]&1)==0) ? "(BOGUS: Bottom of Stack NOT set!)" : "(bottom)" );
return 12 + (plen + 7) / 8;
+
+trunc:
+ return -2;
+}
+
+/*
+ * +-------------------------------+
+ * | |
+ * | RD:IPv4-address (12 octets) |
+ * | |
+ * +-------------------------------+
+ * | MDT Group-address (4 octets) |
+ * +-------------------------------+
+ */
+
+#define MDT_VPN_NLRI_LEN 16
+
+static int
+decode_mdt_vpn_nlri(netdissect_options *ndo,
+ const u_char *pptr, char *buf, u_int buflen)
+{
+
+ const u_char *rd;
+ const u_char *vpn_ip;
+
+ ND_TCHECK(pptr[0]);
+
+ /* if the NLRI is not predefined length, quit.*/
+ if (*pptr != MDT_VPN_NLRI_LEN * 8)
+ return -1;
+ pptr++;
+
+ /* RD */
+ ND_TCHECK2(pptr[0], 8);
+ rd = pptr;
+ pptr+=8;
+
+ /* IPv4 address */
+ ND_TCHECK2(pptr[0], sizeof(struct in_addr));
+ vpn_ip = pptr;
+ pptr+=sizeof(struct in_addr);
+
+ /* MDT Group Address */
+ ND_TCHECK2(pptr[0], sizeof(struct in_addr));
+
+ snprintf(buf, buflen, "RD: %s, VPN IP Address: %s, MC Group Address: %s",
+ bgp_vpn_rd_print(ndo, rd), ipaddr_string(ndo, vpn_ip), ipaddr_string(ndo, pptr));
+
+ return MDT_VPN_NLRI_LEN + 1;
+
+ trunc:
+
+return -2;
}
+#define BGP_MULTICAST_VPN_ROUTE_TYPE_INTRA_AS_I_PMSI 1
+#define BGP_MULTICAST_VPN_ROUTE_TYPE_INTER_AS_I_PMSI 2
+#define BGP_MULTICAST_VPN_ROUTE_TYPE_S_PMSI 3
+#define BGP_MULTICAST_VPN_ROUTE_TYPE_INTRA_AS_SEG_LEAF 4
+#define BGP_MULTICAST_VPN_ROUTE_TYPE_SOURCE_ACTIVE 5
+#define BGP_MULTICAST_VPN_ROUTE_TYPE_SHARED_TREE_JOIN 6
+#define BGP_MULTICAST_VPN_ROUTE_TYPE_SOURCE_TREE_JOIN 7
+
+static const struct tok bgp_multicast_vpn_route_type_values[] = {
+ { BGP_MULTICAST_VPN_ROUTE_TYPE_INTRA_AS_I_PMSI, "Intra-AS I-PMSI"},
+ { BGP_MULTICAST_VPN_ROUTE_TYPE_INTER_AS_I_PMSI, "Inter-AS I-PMSI"},
+ { BGP_MULTICAST_VPN_ROUTE_TYPE_S_PMSI, "S-PMSI"},
+ { BGP_MULTICAST_VPN_ROUTE_TYPE_INTRA_AS_SEG_LEAF, "Intra-AS Segment-Leaf"},
+ { BGP_MULTICAST_VPN_ROUTE_TYPE_SOURCE_ACTIVE, "Source-Active"},
+ { BGP_MULTICAST_VPN_ROUTE_TYPE_SHARED_TREE_JOIN, "Shared Tree Join"},
+ { BGP_MULTICAST_VPN_ROUTE_TYPE_SOURCE_TREE_JOIN, "Source Tree Join"},
+};
+
static int
-decode_labeled_vpn_l2(const u_char *pptr, char *buf, u_int buflen)
+decode_multicast_vpn(netdissect_options *ndo,
+ const u_char *pptr, char *buf, u_int 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;
+
+ 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;
+
+ sg_length = bgp_vpn_sg_print(ndo, pptr, buf, buflen);
+ addr_length = route_length - sg_length;
+
+ 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_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;
+
+ 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_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;
+
+ /*
+ * no per route-type printing yet.
+ */
+ case BGP_MULTICAST_VPN_ROUTE_TYPE_INTRA_AS_SEG_LEAF:
+ default:
+ break;
+ }
+
+ return route_length + 2;
+
+trunc:
+ return -2;
+}
+
+/*
+ * As I remember, some versions of systems have an snprintf() that
+ * returns -1 if the buffer would have overflowed. If the return
+ * value is negative, set buflen to 0, to indicate that we've filled
+ * the buffer up.
+ *
+ * If the return value is greater than buflen, that means that
+ * the buffer would have overflowed; again, set buflen to 0 in
+ * that case.
+ */
+#define UPDATE_BUF_BUFLEN(buf, buflen, strlen) \
+ if (strlen<0) \
+ buflen=0; \
+ else if ((u_int)strlen>buflen) \
+ buflen=0; \
+ else { \
+ buflen-=strlen; \
+ buf+=strlen; \
+ }
+
+static int
+decode_labeled_vpn_l2(netdissect_options *ndo,
+ const u_char *pptr, char *buf, u_int buflen)
{
int plen,tlen,strlen,tlv_type,tlv_len,ttlv_len;
+
+ ND_TCHECK2(pptr[0], 2);
plen=EXTRACT_16BITS(pptr);
tlen=plen;
pptr+=2;
- strlen=snprintf(buf, buflen, "RD: %s, CE-ID: %u, Label-Block Offset: %u, Label Base %u",
- bgp_vpn_rd_print(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 */
- pptr+=15;
- tlen-=15;
-
- /* ok now the variable part - lets read out TLVs*/
- while (tlen>0) {
- tlv_type=*pptr++;
- tlv_len=EXTRACT_16BITS(pptr);
- ttlv_len=tlv_len;
- pptr+=2;
-
- switch(tlv_type) {
- case 1:
- strlen+=snprintf(buf+strlen,buflen-strlen, "\n\t\tcircuit status vector (%u) length: %u: 0x",
- tlv_type,
- tlv_len);
- ttlv_len=ttlv_len/8+1; /* how many bytes do we need to read ? */
- while (ttlv_len>0) {
- strlen+=snprintf(buf+strlen,buflen-strlen, "%02x",*pptr++);
- ttlv_len--;
- }
- break;
- default:
- snprintf(buf+strlen,buflen-strlen, "\n\t\tunknown TLV #%u, length: %u",
- tlv_type,
- tlv_len);
- break;
- }
- tlen-=(tlv_len<<3); /* the tlv-length is expressed in bits so lets shift it tright */
+ /* 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';
+ strlen=snprintf(buf, buflen, "RD: %s, BGPNH: %s",
+ bgp_vpn_rd_print(ndo, pptr),
+ /* need something like getname(ndo, ) here */
+ getname(ndo, pptr+8)
+ );
+ UPDATE_BUF_BUFLEN(buf, buflen, strlen);
+ 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';
+ strlen=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, strlen);
+ 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) {
+ strlen=snprintf(buf,buflen, "\n\t\tcircuit status vector (%u) length: %u: 0x",
+ tlv_type,
+ tlv_len);
+ UPDATE_BUF_BUFLEN(buf, buflen, strlen);
+ }
+ 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) {
+ strlen=snprintf(buf,buflen, "%02x",*pptr++);
+ UPDATE_BUF_BUFLEN(buf, buflen, strlen);
+ }
+ ttlv_len--;
+ }
+ break;
+ default:
+ if (buflen!=0) {
+ strlen=snprintf(buf,buflen, "\n\t\tunknown TLV #%u, length: %u",
+ tlv_type,
+ tlv_len);
+ UPDATE_BUF_BUFLEN(buf, buflen, strlen);
+ }
+ 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;
}
- return plen+2;
+
+trunc:
+ return -2;
}
#ifdef INET6
+int
+decode_prefix6(netdissect_options *ndo,
+ const u_char *pd, u_int itemlen, char *buf, u_int 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", getname6(ndo, (u_char *)&addr), plen);
+ return 1 + plenbytes;
+
+trunc:
+ return -2;
+
+badtlv:
+ return -3;
+}
+
static int
-decode_prefix6(const u_char *pd, char *buf, u_int buflen)
+decode_labeled_prefix6(netdissect_options *ndo,
+ const u_char *pptr, u_int itemlen, char *buf, u_int 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",
+ getname6(ndo, (u_char *)&addr),
+ plen,
+ EXTRACT_24BITS(pptr+1)>>4,
+ ((pptr[3]&1)==0) ? "(BOGUS: Bottom of Stack NOT set!)" : "(bottom)" );
+
+ return 4 + plenbytes;
+
+trunc:
+ return -2;
+
+badtlv:
+ return -3;
+}
+
+static int
+decode_labeled_vpn_prefix6(netdissect_options *ndo,
+ const u_char *pptr, char *buf, u_int buflen)
{
struct in6_addr addr;
u_int plen;
- plen = pd[0];
- if (plen < 0 || 128 < plen)
+ ND_TCHECK(pptr[0]);
+ plen = pptr[0]; /* get prefix length */
+
+ if ((24+64) > plen)
+ return -1;
+
+ plen-=(24+64); /* adjust prefixlen - labellength - RD len*/
+
+ if (128 < plen)
return -1;
memset(&addr, 0, sizeof(addr));
- memcpy(&addr, &pd[1], (plen + 7) / 8);
+ 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);
}
- snprintf(buf, buflen, "%s/%d", getname6((u_char *)&addr), plen);
- return 1 + (plen + 7) / 8;
+ /* 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),
+ getname6(ndo, (u_char *)&addr),
+ plen,
+ EXTRACT_24BITS(pptr+1)>>4,
+ ((pptr[3]&1)==0) ? "(BOGUS: Bottom of Stack NOT set!)" : "(bottom)" );
+
+ return 12 + (plen + 7) / 8;
+
+trunc:
+ return -2;
}
#endif
-static void
-bgp_attr_print(const struct bgp_attr *attr, const u_char *pptr, int len)
+static int
+decode_clnp_prefix(netdissect_options *ndo,
+ const u_char *pptr, char *buf, u_int buflen)
+{
+ uint8_t addr[19];
+ u_int plen;
+
+ ND_TCHECK(pptr[0]);
+ plen = pptr[0]; /* get prefix length */
+
+ 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(addr,(plen + 7) / 8),
+ plen);
+
+ return 1 + (plen + 7) / 8;
+
+trunc:
+ return -2;
+}
+
+static int
+decode_labeled_vpn_clnp_prefix(netdissect_options *ndo,
+ const u_char *pptr, char *buf, u_int buflen)
+{
+ uint8_t addr[19];
+ u_int plen;
+
+ ND_TCHECK(pptr[0]);
+ plen = pptr[0]; /* get prefix length */
+
+ if ((24+64) > plen)
+ return -1;
+
+ plen-=(24+64); /* adjust prefixlen - labellength - RD len*/
+
+ 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(addr,(plen + 7) / 8),
+ plen,
+ EXTRACT_24BITS(pptr+1)>>4,
+ ((pptr[3]&1)==0) ? "(BOGUS: Bottom of Stack NOT set!)" : "(bottom)" );
+
+ return 12 + (plen + 7) / 8;
+
+trunc:
+ return -2;
+}
+
+/*
+ * bgp_attr_get_as_size
+ *
+ * Try to find the size of the ASs encoded in an as-path. It is not obvious, as
+ * 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
+bgp_attr_get_as_size(netdissect_options *ndo,
+ uint8_t bgpa_type, const u_char *pptr, int len)
+{
+ const u_char *tptr = pptr;
+
+ /*
+ * If the path attribute is the optional AS4 path type, then we already
+ * know, that ASs must be encoded in 4 byte format.
+ */
+ if (bgpa_type == BGPTYPE_AS4_PATH) {
+ return 4;
+ }
+
+ /*
+ * Let us assume that ASs are of 2 bytes in size, and check if the AS-Path
+ * TLV is good. If not, ask the caller to try with AS encoded as 4 bytes
+ * each.
+ */
+ while (tptr < pptr + len) {
+ ND_TCHECK(tptr[0]);
+
+ /*
+ * 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) {
+ goto trunc;
+ }
+ ND_TCHECK(tptr[1]);
+ tptr += 2 + tptr[1] * 2;
+ }
+
+ /*
+ * If we correctly reached end of the AS path attribute data content,
+ * then most likely ASs were indeed encoded as 2 bytes.
+ */
+ if (tptr == pptr + len) {
+ return 2;
+ }
+
+trunc:
+
+ /*
+ * We can come here, either we did not have enough data, or if we
+ * try to decode 4 byte ASs in 2 byte format. Either way, return 4,
+ * 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;
+}
+
+static int
+bgp_attr_print(netdissect_options *ndo,
+ u_int atype, const u_char *pptr, u_int len)
{
int i;
- u_int16_t af;
- u_int8_t safi, snpa;
+ uint16_t af;
+ uint8_t safi, snpa, nhlen;
+ union { /* copy buffer for bandwidth values */
+ float f;
+ uint32_t i;
+ } bw;
int advance;
- int tlen;
+ u_int tlen;
const u_char *tptr;
char buf[MAXHOSTNAMELEN + 100];
+ char tokbuf[TOKBUFSIZE];
+ int as_size;
tptr = pptr;
tlen=len;
- switch (attr->bgpa_type) {
+ switch (atype) {
case BGPTYPE_ORIGIN:
if (len != 1)
- printf("invalid len");
- else
- printf("%s", tok2str(bgp_origin_values, "Unknown Origin Typecode", tptr[0]));
+ ND_PRINT((ndo, "invalid len"));
+ else {
+ ND_TCHECK(*tptr);
+ ND_PRINT((ndo, "%s", tok2strbuf(bgp_origin_values,
+ "Unknown Origin Typecode",
+ tptr[0],
+ tokbuf, sizeof(tokbuf))));
+ }
break;
+
+
+ /*
+ * Process AS4 byte path and AS2 byte path attributes here.
+ */
+ case BGPTYPE_AS4_PATH:
case BGPTYPE_AS_PATH:
if (len % 2) {
- printf("invalid len");
+ ND_PRINT((ndo, "invalid len"));
break;
}
if (!len) {
- printf("empty");
+ ND_PRINT((ndo, "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) {
- /*
- * under RFC1965, p[0] means:
- * 1: AS_SET 2: AS_SEQUENCE
- * 3: AS_CONFED_SET 4: AS_CONFED_SEQUENCE
- */
- if (tptr[0] == 3 || tptr[0] == 4)
- printf("confed");
- printf("%s", (tptr[0] & 1) ? "{" : "");
- for (i = 0; i < tptr[1] * 2; i += 2) {
- printf("%s%u", i == 0 ? "" : " ",
- EXTRACT_16BITS(&tptr[2 + i]));
- }
- printf("%s", (tptr[0] & 1) ? "}" : "");
- tptr += 2 + tptr[1] * 2;
+ ND_TCHECK(tptr[0]);
+ ND_PRINT((ndo, "%s", tok2strbuf(bgp_as_path_segment_open_values,
+ "?", tptr[0],
+ tokbuf, sizeof(tokbuf))));
+ 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", tok2strbuf(bgp_as_path_segment_close_values,
+ "?", tptr[0],
+ tokbuf, sizeof(tokbuf))));
+ ND_TCHECK(tptr[1]);
+ tptr += 2 + tptr[1] * as_size;
}
break;
case BGPTYPE_NEXT_HOP:
if (len != 4)
- printf("invalid len");
- else
- printf("%s", getname(tptr));
+ ND_PRINT((ndo, "invalid len"));
+ else {
+ ND_TCHECK2(tptr[0], 4);
+ ND_PRINT((ndo, "%s", getname(ndo, tptr)));
+ }
break;
case BGPTYPE_MULTI_EXIT_DISC:
case BGPTYPE_LOCAL_PREF:
if (len != 4)
- printf("invalid len");
- else
- printf("%u", EXTRACT_32BITS(tptr));
+ 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)
- printf("invalid len");
+ ND_PRINT((ndo, "invalid len"));
break;
- case BGPTYPE_AGGREGATOR:
- if (len != 6) {
- printf("invalid len");
+ 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;
+ }
+ ND_TCHECK2(tptr[0], len);
+ if (len == 6) {
+ ND_PRINT((ndo, " AS #%s, origin %s",
+ as_printf(ndo, astostr, sizeof(astostr), EXTRACT_16BITS(tptr)),
+ getname(ndo, tptr + 2)));
+ } else {
+ ND_PRINT((ndo, " AS #%s, origin %s",
+ as_printf(ndo, astostr, sizeof(astostr),
+ EXTRACT_32BITS(tptr)), getname(ndo, tptr + 4)));
+ }
+ break;
+ case BGPTYPE_AGGREGATOR4:
+ if (len != 8) {
+ ND_PRINT((ndo, "invalid len"));
break;
}
- printf(" AS #%u, origin %s", EXTRACT_16BITS(tptr),
- getname(tptr + 2));
+ ND_TCHECK2(tptr[0], 8);
+ ND_PRINT((ndo, " AS #%s, origin %s",
+ as_printf(ndo, astostr, sizeof(astostr), EXTRACT_32BITS(tptr)),
+ getname(ndo, tptr + 4)));
break;
case BGPTYPE_COMMUNITIES:
if (len % 4) {
- printf("invalid len");
+ ND_PRINT((ndo, "invalid len"));
break;
}
while (tlen>0) {
- u_int32_t comm;
+ uint32_t comm;
+ ND_TCHECK2(tptr[0], 4);
comm = EXTRACT_32BITS(tptr);
switch (comm) {
case BGP_COMMUNITY_NO_EXPORT:
- printf(" NO_EXPORT");
+ ND_PRINT((ndo, " NO_EXPORT"));
break;
case BGP_COMMUNITY_NO_ADVERT:
- printf(" NO_ADVERTISE");
+ ND_PRINT((ndo, " NO_ADVERTISE"));
break;
case BGP_COMMUNITY_NO_EXPORT_SUBCONFED:
- printf(" NO_EXPORT_SUBCONFED");
+ ND_PRINT((ndo, " NO_EXPORT_SUBCONFED"));
break;
default:
- printf("%u:%u%s",
+ ND_PRINT((ndo, "%u:%u%s",
(comm >> 16) & 0xffff,
comm & 0xffff,
- (tlen>4) ? ", " : "");
+ (tlen>4) ? ", " : ""));
break;
}
tlen -=4;
break;
case BGPTYPE_ORIGINATOR_ID:
if (len != 4) {
- printf("invalid len");
+ ND_PRINT((ndo, "invalid len"));
break;
}
- printf("%s",getname(tptr));
+ ND_TCHECK2(tptr[0], 4);
+ ND_PRINT((ndo, "%s",getname(ndo, tptr)));
break;
case BGPTYPE_CLUSTER_LIST:
+ if (len % 4) {
+ ND_PRINT((ndo, "invalid len"));
+ break;
+ }
while (tlen>0) {
- printf("%s%s",
- getname(tptr),
- (tlen>4) ? ", " : "");
+ ND_TCHECK2(tptr[0], 4);
+ ND_PRINT((ndo, "%s%s",
+ getname(ndo, tptr),
+ (tlen>4) ? ", " : ""));
tlen -=4;
tptr +=4;
}
break;
case BGPTYPE_MP_REACH_NLRI:
+ ND_TCHECK2(tptr[0], 3);
af = EXTRACT_16BITS(tptr);
safi = tptr[2];
-
- printf("\n\t AFI: %s (%u), %sSAFI: %s (%u)",
- tok2str(bgp_afi_values, "Unknown AFI", af),
+
+ ND_PRINT((ndo, "\n\t AFI: %s (%u), %sSAFI: %s (%u)",
+ tok2strbuf(af_values, "Unknown AFI", af,
+ tokbuf, sizeof(tokbuf)),
af,
(safi>128) ? "vendor specific " : "", /* 128 is meanwhile wellknown */
- tok2str(bgp_safi_values, "Unknown SAFI", safi),
- safi);
-
- if (af == AFNUM_INET || af==AFNUM_L2VPN)
- ;
+ tok2strbuf(bgp_safi_values, "Unknown SAFI", safi,
+ tokbuf, sizeof(tokbuf)),
+ 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):
#ifdef INET6
- else if (af == AFNUM_INET6)
- ;
+ 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):
#endif
- else {
- printf("\n\t no AFI %u decoder",af);
- if (!vflag)
- print_unknown_data(tptr,"\n\t ",tlen);
+ 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_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);
+ goto done;
break;
}
tptr +=3;
- tlen = tptr[0];
+ ND_TCHECK(tptr[0]);
+ nhlen = tptr[0];
+ tlen = nhlen;
tptr++;
if (tlen) {
- printf("\n\t nexthop: ");
- while (tlen > 0) {
- switch (af) {
- case AFNUM_INET:
- switch(safi) {
- case SAFNUM_UNICAST:
- case SAFNUM_MULTICAST:
- case SAFNUM_UNIMULTICAST:
- case SAFNUM_LABUNICAST:
- printf("%s",getname(tptr));
- tlen -= sizeof(struct in_addr);
- tptr += sizeof(struct in_addr);
- break;
- case SAFNUM_VPNUNICAST:
- case SAFNUM_VPNMULTICAST:
- case SAFNUM_VPNUNIMULTICAST:
- printf("RD: %s, %s",
- bgp_vpn_rd_print(tptr),
- getname(tptr+BGP_VPN_RD_LEN));
- tlen -= (sizeof(struct in_addr)+BGP_VPN_RD_LEN);
- tptr += (sizeof(struct in_addr)+BGP_VPN_RD_LEN);
- break;
- default:
- printf("no SAFI %u decoder",safi);
- if (!vflag)
- print_unknown_data(tptr,"\n\t ",tlen);
- break;
- }
- break;
+ 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",getname(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),
+ getname(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;
#ifdef INET6
- case AFNUM_INET6:
- switch(safi) {
- case SAFNUM_UNICAST:
- case SAFNUM_MULTICAST:
- case SAFNUM_UNIMULTICAST:
- case SAFNUM_LABUNICAST:
- printf("%s", getname6(tptr));
- tlen -= sizeof(struct in6_addr);
- tptr += sizeof(struct in6_addr);
- break;
- case SAFNUM_VPNUNICAST:
- case SAFNUM_VPNMULTICAST:
- case SAFNUM_VPNUNIMULTICAST:
- printf("RD: %s, %s",
- bgp_vpn_rd_print(tptr),
- getname6(tptr+BGP_VPN_RD_LEN));
- tlen -= (sizeof(struct in6_addr)+BGP_VPN_RD_LEN);
- tptr += (sizeof(struct in6_addr)+BGP_VPN_RD_LEN);
- break;
- default:
- printf("no SAFI %u decoder",safi);
- if (!vflag)
- print_unknown_data(tptr,"\n\t ",tlen);
- break;
- }
- 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", getname6(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),
+ getname6(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;
#endif
- case AFNUM_L2VPN:
- switch(safi) {
- case SAFNUM_VPNUNICAST:
- case SAFNUM_VPNMULTICAST:
- case SAFNUM_VPNUNIMULTICAST:
- printf("%s", getname(tptr));
- tlen -= (sizeof(struct in_addr));
- tptr += (sizeof(struct in_addr));
- break;
- default:
- printf("no SAFI %u decoder",safi);
- if (!vflag)
- print_unknown_data(tptr,"\n\t ",tlen);
- break;
- }
- break;
-
- default:
- printf("no AFI %u decoder",af);
- if (!vflag)
- print_unknown_data(tptr,"\n\t ",tlen);
- 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", getname(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(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(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", getname(ndo, tptr+BGP_VPN_RD_LEN+4)));
+#ifdef INET6
+ /* rfc1888 mapped IPv6 address ? */
+ else if (EXTRACT_24BITS(tptr+BGP_VPN_RD_LEN) == 0x350000)
+ ND_PRINT((ndo, " = %s", getname6(ndo, tptr+BGP_VPN_RD_LEN+3)));
+#endif
+ 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) {
- printf("\n\t %u SNPA", snpa);
+ ND_PRINT((ndo, "\n\t %u SNPA", snpa));
for (/*nothing*/; snpa > 0; snpa--) {
- printf("\n\t %d bytes", tptr[0]);
+ ND_TCHECK(tptr[0]);
+ ND_PRINT((ndo, "\n\t %d bytes", tptr[0]));
tptr += tptr[0] + 1;
}
} else {
- printf(", no SNPA");
+ ND_PRINT((ndo, ", no SNPA"));
}
while (len - (tptr - pptr) > 0) {
- switch (af) {
- case AFNUM_INET:
- switch (safi) {
- case SAFNUM_UNICAST:
- case SAFNUM_MULTICAST:
- case SAFNUM_UNIMULTICAST:
- advance = decode_prefix4(tptr, buf, sizeof(buf));
- printf("\n\t %s", buf);
- break;
- case SAFNUM_LABUNICAST:
- advance = decode_labeled_prefix4(tptr, buf, sizeof(buf));
- printf("\n\t %s", buf);
- break;
- case SAFNUM_VPNUNICAST:
- case SAFNUM_VPNMULTICAST:
- case SAFNUM_VPNUNIMULTICAST:
- advance = decode_labeled_vpn_prefix4(tptr, buf, sizeof(buf));
- printf("\n\t %s", buf);
- break;
- default:
- printf("\n\t no SAFI %u decoder",safi);
- if (!vflag)
- print_unknown_data(tptr-3,"\n\t ",tlen);
- advance = 0;
- tptr = pptr + len;
- break;
- }
- break;
+ 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;
#ifdef INET6
- case AFNUM_INET6:
- switch (safi) {
- case SAFNUM_UNICAST:
- case SAFNUM_MULTICAST:
- case SAFNUM_UNIMULTICAST:
- advance = decode_prefix6(tptr, buf, sizeof(buf));
- printf("\n\t %s", buf);
- break;
- default:
- printf("\n\t no SAFI %u decoder ",safi);
- if (!vflag)
- print_unknown_data(tptr-3,"\n\t ",tlen);
- advance = 0;
- tptr = pptr + len;
- break;
- }
- 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;
#endif
- case AFNUM_L2VPN:
- switch(safi) {
- case SAFNUM_VPNUNICAST:
- case SAFNUM_VPNMULTICAST:
- case SAFNUM_VPNUNIMULTICAST:
- advance = decode_labeled_vpn_l2(tptr, buf, sizeof(buf));
- printf("\n\t %s", buf);
- break;
- default:
- printf("no SAFI %u decoder",safi);
- if (!vflag)
- print_unknown_data(tptr,"\n\t ",tlen);
- advance = 0;
- tptr = pptr + len;
- break;
- }
- break;
-
-
- default:
- printf("\n\t no AFI %u decoder ",af);
- if (!vflag)
- print_unknown_data(tptr-3,"\n\t ",tlen);
- advance = 0;
- tptr = pptr + len;
- break;
- }
- tptr += advance;
+ 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];
- printf("\n\t AFI: %s (%u), %sSAFI: %s (%u)",
- tok2str(bgp_afi_values, "Unknown AFI", af),
+ ND_PRINT((ndo, "\n\t AFI: %s (%u), %sSAFI: %s (%u)",
+ tok2strbuf(af_values, "Unknown AFI", af,
+ tokbuf, sizeof(tokbuf)),
af,
(safi>128) ? "vendor specific " : "", /* 128 is meanwhile wellknown */
- tok2str(bgp_safi_values, "Unknown SAFI", safi),
- safi);
+ tok2strbuf(bgp_safi_values, "Unknown SAFI", safi,
+ tokbuf, sizeof(tokbuf)),
+ 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) {
- case AFNUM_INET:
- switch (safi) {
- case SAFNUM_UNICAST:
- case SAFNUM_MULTICAST:
- case SAFNUM_UNIMULTICAST:
- advance = decode_prefix4(tptr, buf, sizeof(buf));
- printf("\n\t %s", buf);
- break;
- case SAFNUM_LABUNICAST:
- advance = decode_labeled_prefix4(tptr, buf, sizeof(buf));
- printf("\n\t %s", buf);
- break;
- case SAFNUM_VPNUNICAST:
- case SAFNUM_VPNMULTICAST:
- case SAFNUM_VPNUNIMULTICAST:
- advance = decode_labeled_vpn_prefix4(tptr, buf, sizeof(buf));
- printf("\n\t %s", buf);
- break;
- default:
- printf("\n\t no SAFI %u decoder",safi);
- if (!vflag)
- print_unknown_data(tptr-3,"\n\t ",tlen);
- advance = 0;
- tptr = pptr + len;
- break;
- }
- break;
+ 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;
#ifdef INET6
- case AFNUM_INET6:
- switch (safi) {
- case SAFNUM_UNICAST:
- case SAFNUM_MULTICAST:
- case SAFNUM_UNIMULTICAST:
- advance = decode_prefix6(tptr, buf, sizeof(buf));
- printf("\n\t %s", buf);
- break;
- default:
- printf("\n\t no SAFI %u decoder",safi);
- if (!vflag)
- print_unknown_data(tptr-3,"\n\t ",tlen);
- advance = 0;
- tptr = pptr + len;
- break;
- }
- 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;
#endif
-
- case AFNUM_L2VPN:
- switch(safi) {
- case SAFNUM_VPNUNICAST:
- case SAFNUM_VPNMULTICAST:
- case SAFNUM_VPNUNIMULTICAST:
- advance = decode_labeled_vpn_l2(tptr, buf, sizeof(buf));
- printf("\n\t %s", buf);
- break;
- default:
- printf("no SAFI %u decoder",safi);
- if (!vflag)
- print_unknown_data(tptr-3,"\n\t ",tlen);
- advance = 0;
- tptr = pptr + len;
- break;
- }
- break;
-
- default:
- printf("\n\t no AFI %u decoder",af);
- if (!vflag)
- print_unknown_data(tptr-3,"\n\t ",tlen);
- advance = 0;
- tptr = pptr + len;
- break;
- }
-
- tptr += advance;
+ 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) {
- printf("invalid len");
+ ND_PRINT((ndo, "invalid len"));
break;
}
while (tlen>0) {
- u_int8_t extd_comm,extd_comm_type,extd_comm_subtype;
- extd_comm=*tptr;
- extd_comm_type=extd_comm&0x3f;
- extd_comm_subtype=*(tptr+1);
- switch(extd_comm_type) {
- case 0:
- switch (extd_comm_subtype) {
- case 2:
- case 3:
- case 4:
- printf("\n\t %s%s%s:%u:%s",
- (extd_comm&0x80) ? "vendor-specific: " : "",
- (extd_comm&0x40) ? "non-transitive: " : "",
- tok2str(bgp_extd_comm_subtype_values,
- "unknown",
- extd_comm_subtype&0x3f),
- EXTRACT_16BITS(tptr+2),
- getname(tptr+4));
- break;
- /* juniper has allocated typecode 10 to convey l2 information */
- case 10:
- printf("\n\t %s%s:%s:Control Flags [0x%02x]:MTU %u",
- (extd_comm&0x40) ? "non-transitive: " : "",
- tok2str(bgp_extd_comm_subtype_values,
- "unknown",
- extd_comm_subtype&0x3f),
- tok2str(bgp_l2vpn_encaps_values,
- "unknown encaps",
- *(tptr+2)),
+ uint16_t extd_comm;
+
+ ND_TCHECK2(tptr[0], 2);
+ extd_comm=EXTRACT_16BITS(tptr);
+
+ ND_PRINT((ndo, "\n\t %s (0x%04x), Flags [%s]",
+ tok2strbuf(bgp_extd_comm_subtype_values,
+ "unknown extd community typecode",
+ extd_comm, tokbuf, sizeof(tokbuf)),
+ 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),
+ getname(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",
+ getname(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", getname(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",
+ getname(ndo, tptr+2),
+ tok2strbuf(bgp_extd_comm_ospf_rtype_values,
+ "unknown (0x%02x)",
+ *(tptr+6),
+ tokbuf, sizeof(tokbuf)),
+ (*(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",
+ tok2strbuf(l2vpn_encaps_values,
+ "unknown encaps",
+ *(tptr+2),
+ tokbuf, sizeof(tokbuf)),
*(tptr+3),
- EXTRACT_16BITS(tptr+4));
- break;
- }
- break;
- case 1:
- printf("\n\t %s%s%s:%s:%u",
- (extd_comm&0x80) ? "vendor-specific: " : "",
- (extd_comm&0x40) ? "non-transitive: " : "",
- tok2str(bgp_extd_comm_subtype_values,
- "unknown",
- extd_comm_subtype&0x3f),
- getname(tptr+2),
- EXTRACT_16BITS(tptr+6));
- break;
- case 2:
- printf("\n\t %s%s%s:%u:%u",
- (extd_comm&0x80) ? "vendor-specific: " : "",
- (extd_comm&0x40) ? "non-transitive: " : "",
- tok2str(bgp_extd_comm_subtype_values,
- "unknown",
- extd_comm_subtype&0x3f),
- EXTRACT_32BITS(tptr+2),
- EXTRACT_16BITS(tptr+6));
- break;
- default:
- printf("\n\t no typecode %u decoder",
- extd_comm_type);
- print_unknown_data(tptr,"\n\t ",8);
- break;
+ 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;
}
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 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);
+ }
+ }
+ 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, atype, 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",
+ tok2strbuf(bgp_attr_values,
+ "Unknown Attribute", atype,
+ tokbuf, sizeof(tokbuf)),
+ 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;
+ }
+ break;
+
+
default:
- printf("\n\t no Attribute %u decoder",attr->bgpa_type); /* we have no decoder for the attribute */
- if (!vflag)
- print_unknown_data(pptr,"\n\t ",len);
+ 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);
break;
}
- if (vflag&&len) /* omit zero length attributes*/
- print_unknown_data(pptr,"\n\t ",len);
+ if (ndo->ndo_vflag > 1 && len) { /* omit zero length attributes*/
+ ND_TCHECK2(*pptr,len);
+ print_unknown_data(ndo, pptr, "\n\t ", len);
+ }
+ return 1;
+
+trunc:
+ return 0;
+}
+
+static void
+bgp_capabilities_print(netdissect_options *ndo,
+ const u_char *opt, int caps_len)
+{
+ char tokbuf[TOKBUFSIZE];
+ char tokbuf2[TOKBUFSIZE];
+ 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",
+ tok2strbuf(bgp_capcode_values, "Unknown",
+ cap_type, tokbuf, sizeof(tokbuf)),
+ 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)",
+ tok2strbuf(af_values, "Unknown",
+ EXTRACT_16BITS(opt+i+2),
+ tokbuf, sizeof(tokbuf)),
+ EXTRACT_16BITS(opt+i+2),
+ tok2strbuf(bgp_safi_values, "Unknown",
+ opt[i+5],
+ tokbuf, sizeof(tokbuf)),
+ 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",
+ tok2strbuf(af_values,"Unknown",
+ EXTRACT_16BITS(opt+i+cap_offset),
+ tokbuf, sizeof(tokbuf)),
+ EXTRACT_16BITS(opt+i+cap_offset),
+ tok2strbuf(bgp_safi_values,"Unknown",
+ opt[i+cap_offset+2],
+ tokbuf2, sizeof(tokbuf2)),
+ 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;
+ 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);
+ 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;
+ }
+ return;
+
+trunc:
+ ND_PRINT((ndo, "[|BGP]"));
}
static void
-bgp_open_print(const u_char *dat, int length)
+bgp_open_print(netdissect_options *ndo,
+ const u_char *dat, int length)
{
struct bgp_open bgpo;
struct bgp_opt bgpopt;
- int hlen;
const u_char *opt;
- int i,cap_type,cap_len;
+ int i;
+ char tokbuf[TOKBUFSIZE];
- TCHECK2(dat[0], BGP_OPEN_SIZE);
+ ND_TCHECK2(dat[0], BGP_OPEN_SIZE);
memcpy(&bgpo, dat, BGP_OPEN_SIZE);
- hlen = ntohs(bgpo.bgpo_len);
- printf("\n\t Version %d, ", bgpo.bgpo_version);
- printf("my AS %u, ", ntohs(bgpo.bgpo_myas));
- printf("Holdtime %us, ", ntohs(bgpo.bgpo_holdtime));
- printf("ID %s", getname((u_char *)&bgpo.bgpo_id));
- printf("\n\t Optional parameters, length: %u", bgpo.bgpo_optlen);
+ 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", getname(ndo, (u_char *)&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;
i = 0;
while (i < bgpo.bgpo_optlen) {
- TCHECK2(opt[i], BGP_OPT_SIZE);
+ ND_TCHECK2(opt[i], BGP_OPT_SIZE);
memcpy(&bgpopt, &opt[i], BGP_OPT_SIZE);
if (i + 2 + bgpopt.bgpopt_len > bgpo.bgpo_optlen) {
- printf("\n\t Option %d, length: %u", bgpopt.bgpopt_type, bgpopt.bgpopt_len);
+ ND_PRINT((ndo, "\n\t Option %d, length: %u", bgpopt.bgpopt_type, bgpopt.bgpopt_len));
break;
}
- printf("\n\t Option %s (%u), length: %u",
- tok2str(bgp_opt_values,"Unknown", bgpopt.bgpopt_type),
- bgpopt.bgpopt_type,
- bgpopt.bgpopt_len);
-
- /* now lets decode the options we know*/
- switch(bgpopt.bgpopt_type) {
- case BGP_OPT_CAP:
- cap_type=opt[i+BGP_OPT_SIZE];
- cap_len=opt[i+BGP_OPT_SIZE+1];
- printf("\n\t %s, length: %u",
- tok2str(bgp_capcode_values,"Unknown", cap_type),
- cap_len);
- switch(cap_type) {
- case BGP_CAPCODE_MP:
- printf("\n\t\tAFI %s (%u), SAFI %s (%u)",
- tok2str(bgp_afi_values,"Unknown", EXTRACT_16BITS(opt+i+BGP_OPT_SIZE+2)),
- EXTRACT_16BITS(opt+i+BGP_OPT_SIZE+2),
- tok2str(bgp_safi_values,"Unknown", opt[i+BGP_OPT_SIZE+5]),
- opt[i+BGP_OPT_SIZE+5]);
- break;
- case BGP_CAPCODE_RR:
- case BGP_CAPCODE_RR_CISCO:
- break;
- default:
- printf("\n\t\tno decoder for Capability %u",
- cap_type);
- break;
- }
- break;
- case BGP_OPT_AUTH:
- default:
- printf("\n\t no decoder for option %u",
- bgpopt.bgpopt_type);
- break;
- }
+ ND_PRINT((ndo, "\n\t Option %s (%u), length: %u",
+ tok2strbuf(bgp_opt_values,"Unknown",
+ bgpopt.bgpopt_type,
+ tokbuf, sizeof(tokbuf)),
+ 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;
trunc:
- printf("[|BGP]");
+ ND_PRINT((ndo, "[|BGP]"));
}
static void
-bgp_update_print(const u_char *dat, int length)
+bgp_update_print(netdissect_options *ndo,
+ const u_char *dat, int length)
{
struct bgp bgp;
- struct bgp_attr bgpa;
- int hlen;
const u_char *p;
+ int withdrawn_routes_len;
int len;
int i;
+ char tokbuf[TOKBUFSIZE];
+#ifndef INET6
+ char buf[MAXHOSTNAMELEN + 100];
+ int wpfx;
+#endif
- TCHECK2(dat[0], BGP_SIZE);
+ ND_TCHECK2(dat[0], BGP_SIZE);
+ if (length < BGP_SIZE)
+ goto trunc;
memcpy(&bgp, dat, BGP_SIZE);
- hlen = ntohs(bgp.bgp_len);
p = dat + BGP_SIZE; /*XXX*/
+ length -= BGP_SIZE;
/* Unfeasible routes */
- len = EXTRACT_16BITS(p);
- if (len) {
+ 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;
#ifdef INET6
- printf("\n\t Withdrawn routes: %d bytes", len);
+ ND_PRINT((ndo, "\n\t Withdrawn routes: %d bytes", withdrawn_routes_len));
+ p += withdrawn_routes_len;
+ length -= withdrawn_routes_len;
#else
- char buf[MAXHOSTNAMELEN + 100];
+ if (withdrawn_routes_len < 2)
+ goto trunc;
+ length -= 2;
+ withdrawn_routes_len -= 2;
- TCHECK2(p[2], len);
- i = 2;
- printf("\n\t Withdrawn routes:");
+ ND_PRINT((ndo, "\n\t Withdrawn routes:"));
- while(i < 2 + len) {
- i += decode_prefix4(&p[i], buf, sizeof(buf));
- printf("\n\t %s", buf);
+ while(withdrawn_routes_len > 0) {
+ wpfx = decode_prefix4(ndo, p, withdrawn_routes_len, buf, sizeof(buf));
+ if (wpfx == -1) {
+ ND_PRINT((ndo, "\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((ndo, "\n\t %s", buf));
+ p += wpfx;
+ length -= wpfx;
+ withdrawn_routes_len -= wpfx;
+ }
}
#endif
}
- p += 2 + len;
- TCHECK2(p[0], 2);
+ 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;
+ }
+
if (len) {
/* do something more useful!*/
- i = 2;
- while (i < 2 + len) {
- int alen, aoff;
-
- TCHECK2(p[i], sizeof(bgpa));
- memcpy(&bgpa, &p[i], sizeof(bgpa));
- alen = bgp_attr_len(&bgpa);
- aoff = bgp_attr_off(&bgpa);
-
- printf("\n\t %s (%u), length: %u",
- tok2str(bgp_attr_values, "Unknown Attribute", bgpa.bgpa_type),
- bgpa.bgpa_type,
- alen);
-
- if (bgpa.bgpa_flags) {
- printf(", flags [%s%s%s%s",
- bgpa.bgpa_flags & 0x80 ? "O" : "",
- bgpa.bgpa_flags & 0x40 ? "T" : "",
- bgpa.bgpa_flags & 0x20 ? "P" : "",
- bgpa.bgpa_flags & 0x10 ? "E" : "");
- if (bgpa.bgpa_flags & 0xf)
- printf("+%x", bgpa.bgpa_flags & 0xf);
- printf("]: ");
+ 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",
+ tok2strbuf(bgp_attr_values, "Unknown Attribute",
+ atype,
+ tokbuf, sizeof(tokbuf)),
+ 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, "]: "));
}
- bgp_attr_print(&bgpa, &p[i + aoff], alen);
- i += aoff + alen;
+ 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;
}
}
- p += 2 + len;
- if (dat + length > p) {
- printf("\n\t Updated routes:");
- while (dat + length > p) {
+ 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(p, buf, sizeof(buf));
- printf("\n\t %s", buf);
- if (i < 0)
+ i = decode_prefix4(ndo, p, length, buf, sizeof(buf));
+ if (i == -1) {
+ ND_PRINT((ndo, "\n\t (illegal prefix length)"));
break;
- p += i;
+ } 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;
trunc:
- printf("[|BGP]");
+ ND_PRINT((ndo, "[|BGP]"));
}
static void
-bgp_notification_print(const u_char *dat, int length)
+bgp_notification_print(netdissect_options *ndo,
+ const u_char *dat, int length)
{
struct bgp_notification bgpn;
- int hlen;
+ const u_char *tptr;
+ char tokbuf[TOKBUFSIZE];
+ char tokbuf2[TOKBUFSIZE];
- TCHECK2(dat[0], BGP_NOTIFICATION_SIZE);
+ ND_TCHECK2(dat[0], BGP_NOTIFICATION_SIZE);
memcpy(&bgpn, dat, BGP_NOTIFICATION_SIZE);
- hlen = ntohs(bgpn.bgpn_len);
- printf(", Error - %s", tok2str(bgp_notify_major_values, "Unknown", bgpn.bgpn_major));
+ /* some little sanity checking */
+ if (length<BGP_NOTIFICATION_SIZE)
+ return;
+
+ ND_PRINT((ndo, ", %s (%u)",
+ tok2strbuf(bgp_notify_major_values, "Unknown Error",
+ bgpn.bgpn_major, tokbuf, sizeof(tokbuf)),
+ bgpn.bgpn_major));
switch (bgpn.bgpn_major) {
case BGP_NOTIFY_MAJOR_MSG:
- printf(" subcode %s", tok2str(bgp_notify_minor_msg_values, "Unknown", bgpn.bgpn_minor));
+ ND_PRINT((ndo, ", subcode %s (%u)",
+ tok2strbuf(bgp_notify_minor_msg_values, "Unknown",
+ bgpn.bgpn_minor, tokbuf, sizeof(tokbuf)),
+ bgpn.bgpn_minor));
break;
case BGP_NOTIFY_MAJOR_OPEN:
- printf(" subcode %s", tok2str(bgp_notify_minor_open_values, "Unknown", bgpn.bgpn_minor));
+ ND_PRINT((ndo, ", subcode %s (%u)",
+ tok2strbuf(bgp_notify_minor_open_values, "Unknown",
+ bgpn.bgpn_minor, tokbuf, sizeof(tokbuf)),
+ bgpn.bgpn_minor));
break;
case BGP_NOTIFY_MAJOR_UPDATE:
- printf(" subcode %s", tok2str(bgp_notify_minor_update_values, "Unknown", bgpn.bgpn_minor));
+ ND_PRINT((ndo, ", subcode %s (%u)",
+ tok2strbuf(bgp_notify_minor_update_values, "Unknown",
+ bgpn.bgpn_minor, tokbuf, sizeof(tokbuf)),
+ bgpn.bgpn_minor));
+ break;
+ case BGP_NOTIFY_MAJOR_CAP:
+ ND_PRINT((ndo, " subcode %s (%u)",
+ tok2strbuf(bgp_notify_minor_cap_values, "Unknown",
+ bgpn.bgpn_minor, tokbuf, sizeof(tokbuf)),
+ bgpn.bgpn_minor));
+ case BGP_NOTIFY_MAJOR_CEASE:
+ ND_PRINT((ndo, ", subcode %s (%u)",
+ tok2strbuf(bgp_notify_minor_cease_values, "Unknown",
+ bgpn.bgpn_minor, tokbuf, sizeof(tokbuf)),
+ 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",
+ tok2strbuf(af_values, "Unknown",
+ EXTRACT_16BITS(tptr), tokbuf, sizeof(tokbuf)),
+ EXTRACT_16BITS(tptr),
+ tok2strbuf(bgp_safi_values, "Unknown", *(tptr+2),
+ tokbuf2, sizeof(tokbuf)),
+ *(tptr+2),
+ EXTRACT_32BITS(tptr+3)));
+ }
break;
default:
break;
return;
trunc:
- printf("[|BGP]");
+ ND_PRINT((ndo, "[|BGP]"));
}
static void
-bgp_route_refresh_print(const u_char *pptr, int len) {
+bgp_route_refresh_print(netdissect_options *ndo,
+ const u_char *pptr, int len) {
const struct bgp_route_refresh *bgp_route_refresh_header;
+ char tokbuf[TOKBUFSIZE];
+ char tokbuf2[TOKBUFSIZE];
+
+ ND_TCHECK2(pptr[0], BGP_ROUTE_REFRESH_SIZE);
+
+ /* some little sanity checking */
+ if (len<BGP_ROUTE_REFRESH_SIZE)
+ return;
+
bgp_route_refresh_header = (const struct bgp_route_refresh *)pptr;
- printf("\n\t AFI %s (%u), SAFI %s (%u)",
- tok2str(bgp_afi_values,"Unknown",
- EXTRACT_16BITS(&bgp_route_refresh_header->afi)), /* this stinks but the compiler pads the structure weird */
+ ND_PRINT((ndo, "\n\t AFI %s (%u), SAFI %s (%u)",
+ tok2strbuf(af_values,"Unknown",
+ /* this stinks but the compiler pads the structure
+ * weird */
+ EXTRACT_16BITS(&bgp_route_refresh_header->afi),
+ tokbuf, sizeof(tokbuf)),
EXTRACT_16BITS(&bgp_route_refresh_header->afi),
- tok2str(bgp_safi_values,"Unknown",
- bgp_route_refresh_header->safi),
- bgp_route_refresh_header->safi);
+ tok2strbuf(bgp_safi_values,"Unknown",
+ bgp_route_refresh_header->safi,
+ tokbuf2, sizeof(tokbuf2)),
+ bgp_route_refresh_header->safi));
+
+ if (ndo->ndo_vflag > 1) {
+ ND_TCHECK2(*pptr, len);
+ print_unknown_data(ndo, pptr, "\n\t ", len);
+ }
- if (vflag)
- print_unknown_data(pptr,"\n\t ", len);
-
return;
+trunc:
+ ND_PRINT((ndo, "[|BGP]"));
}
-static void
-bgp_header_print(const u_char *dat, int length)
+static int
+bgp_header_print(netdissect_options *ndo,
+ const u_char *dat, int length)
{
struct bgp bgp;
+ char tokbuf[TOKBUFSIZE];
- TCHECK2(dat[0], BGP_SIZE);
+ ND_TCHECK2(dat[0], BGP_SIZE);
memcpy(&bgp, dat, BGP_SIZE);
- printf("\n\t%s Message (%u), length: %u ",
- tok2str(bgp_msg_values, "Unknown", bgp.bgp_type),
+ ND_PRINT((ndo, "\n\t%s Message (%u), length: %u",
+ tok2strbuf(bgp_msg_values, "Unknown", bgp.bgp_type,
+ tokbuf, sizeof(tokbuf)),
bgp.bgp_type,
- length);
+ length));
switch (bgp.bgp_type) {
case BGP_OPEN:
- bgp_open_print(dat, length);
+ bgp_open_print(ndo, dat, length);
break;
case BGP_UPDATE:
- bgp_update_print(dat, length);
+ bgp_update_print(ndo, dat, length);
break;
case BGP_NOTIFICATION:
- bgp_notification_print(dat, length);
+ bgp_notification_print(ndo, dat, length);
break;
case BGP_KEEPALIVE:
break;
case BGP_ROUTE_REFRESH:
- bgp_route_refresh_print(dat, length);
+ bgp_route_refresh_print(ndo, dat, length);
break;
default:
- /* we have no decoder for the BGP message */
- printf("\n\t no Message %u decoder",bgp.bgp_type);
- print_unknown_data(dat,"\n\t ",length);
+ /* 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;
+ return 1;
trunc:
- printf("[|BGP]");
+ ND_PRINT((ndo, "[|BGP]"));
+ return 0;
}
void
-bgp_print(const u_char *dat, int length)
+bgp_print(netdissect_options *ndo,
+ const u_char *dat, int length)
{
const u_char *p;
const u_char *ep;
0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
};
struct bgp bgp;
- u_int16_t hlen;
+ uint16_t hlen;
+ char tokbuf[TOKBUFSIZE];
ep = dat + length;
- if (snapend < dat + length)
- ep = snapend;
+ if (ndo->ndo_snapend < dat + length)
+ ep = ndo->ndo_snapend;
- printf(": BGP");
+ ND_PRINT((ndo, ": BGP, length: %u", length));
+
+ if (ndo->ndo_vflag < 1) /* lets be less chatty */
+ return;
p = dat;
start = p;
- while (p < snapend) {
- if (!TTEST2(p[0], 1))
+ while (p < ep) {
+ if (!ND_TTEST2(p[0], 1))
break;
if (p[0] != 0xff) {
p++;
continue;
}
- if (!TTEST2(p[0], sizeof(marker)))
+ if (!ND_TTEST2(p[0], sizeof(marker)))
break;
if (memcmp(p, marker, sizeof(marker)) != 0) {
p++;
}
/* found BGP header */
- TCHECK2(p[0], BGP_SIZE); /*XXX*/
+ ND_TCHECK2(p[0], BGP_SIZE); /*XXX*/
memcpy(&bgp, p, BGP_SIZE);
if (start != p)
- printf(" [|BGP]");
+ 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 (TTEST2(p[0], hlen)) {
- bgp_header_print(p, hlen);
+ if (ND_TTEST2(p[0], hlen)) {
+ if (!bgp_header_print(ndo, p, hlen))
+ return;
p += hlen;
start = p;
} else {
- printf("[|BGP %s]", tok2str(bgp_msg_values, "Unknown Message Type",bgp.bgp_type));
+ ND_PRINT((ndo, "\n[|BGP %s]",
+ tok2strbuf(bgp_msg_values,
+ "Unknown Message Type",
+ bgp.bgp_type,
+ tokbuf, sizeof(tokbuf))));
break;
}
}
return;
trunc:
- printf(" [|BGP]");
+ ND_PRINT((ndo, " [|BGP]"));
}
-
-
-
-
-
-
-
-
-
-
+/*
+ * Local Variables:
+ * c-style: whitesmith
+ * c-basic-offset: 4
+ * End:
+ */
projects / tcpdump / blobdiff