X-Git-Url: https://git.tcpdump.org/tcpdump/blobdiff_plain/75d14d6553f9cb78846968df4a3cb79955e998ed..refs/heads/tcpdump-4.1:/print-bgp.c diff --git a/print-bgp.c b/print-bgp.c index 9deb2e83..d77802dd 100644 --- a/print-bgp.c +++ b/print-bgp.c @@ -25,6 +25,9 @@ * 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. + * + * Extensively modified by Hannes Gredler (hannes@juniper.net) for more + * complete BGP support. */ #ifdef HAVE_CONFIG_H @@ -32,25 +35,22 @@ #endif #ifndef lint -static const char rcsid[] = - "@(#) $Header: /tcpdump/master/tcpdump/print-bgp.c,v 1.37 2002-07-18 00:39:12 hannes Exp $"; +static const char rcsid[] _U_ = + "@(#) $Header: /tcpdump/master/tcpdump/print-bgp.c,v 1.118 2007-12-07 15:54:52 hannes Exp $"; #endif -#include -#include -#include -#include - -#include +#include -#include #include #include -#include #include "interface.h" +#include "decode_prefix.h" #include "addrtoname.h" #include "extract.h" +#include "bgp.h" +#include "af.h" +#include "l2vpn.h" struct bgp { u_int8_t bgp_marker[16]; @@ -63,12 +63,14 @@ struct bgp { #define BGP_UPDATE 2 #define BGP_NOTIFICATION 3 #define BGP_KEEPALIVE 4 +#define BGP_ROUTE_REFRESH 5 static struct tok bgp_msg_values[] = { { BGP_OPEN, "Open"}, { BGP_UPDATE, "Update"}, { BGP_NOTIFICATION, "Notification"}, { BGP_KEEPALIVE, "Keepalive"}, + { BGP_ROUTE_REFRESH, "Route Refresh"}, { 0, NULL} }; @@ -92,16 +94,27 @@ struct bgp_opt { }; #define BGP_OPT_SIZE 2 /* some compilers may pad to 4 bytes */ +#define BGP_UPDATE_MINSIZE 23 + 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 */ }; #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) */ +#define BGP_ROUTE_REFRESH_SIZE 23 + struct bgp_attr { u_int8_t bgpa_flags; u_int8_t bgpa_type; @@ -111,7 +124,7 @@ struct bgp_attr { } bgpa_len; #define bgp_attr_len(p) \ (((p)->bgpa_flags & 0x10) ? \ - ntohs((p)->bgpa_len.elen) : (p)->bgpa_len.len) + EXTRACT_16BITS(&(p)->bgpa_len.elen) : (p)->bgpa_len.len) #define bgp_attr_off(p) \ (((p)->bgpa_flags & 0x10) ? 4 : 3) }; @@ -132,15 +145,23 @@ struct bgp_attr { #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 */ + +#define BGP_MP_NLRI_MINSIZE 3 /* End of RIB Marker detection */ static 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"}, @@ -150,10 +171,36 @@ static struct tok bgp_attr_values[] = { { 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 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 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 @@ -166,11 +213,19 @@ static struct tok bgp_opt_values[] = { #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[] = { { 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} }; @@ -181,6 +236,7 @@ static struct tok bgp_capcode_values[] = { #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[] = { { BGP_NOTIFY_MAJOR_MSG, "Message Header Error"}, @@ -189,6 +245,20 @@ static struct tok bgp_notify_major_values[] = { { 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 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} }; @@ -206,6 +276,7 @@ static struct tok bgp_notify_minor_open_values[] = { { 4, "Unsupported Optional Parameter"}, { 5, "Authentication Failure"}, { 6, "Unacceptable Hold Time"}, + { 7, "Capability Message Error"}, { 0, NULL} }; @@ -224,6 +295,14 @@ static struct tok bgp_notify_minor_update_values[] = { { 0, NULL} }; +static 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 struct tok bgp_origin_values[] = { { 0, "IGP"}, { 1, "EGP"}, @@ -231,6 +310,31 @@ static struct tok bgp_origin_values[] = { { 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 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 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 @@ -238,10 +342,20 @@ static struct tok bgp_origin_values[] = { #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[] = { { SAFNUM_RES, "Reserved"}, @@ -249,9 +363,14 @@ static struct tok bgp_safi_values[] = { { 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 } }; @@ -260,115 +379,648 @@ static struct tok bgp_safi_values[] = { #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 /* draft-ietf-l3vpn-2547bis-mcast-bgp-02.txt */ +#define BGP_EXT_COM_VRF_RT_IMP 0x010a /* draft-ietf-l3vpn-2547bis-mcast-bgp-02.txt */ + +/* 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 struct tok bgp_extd_comm_flag_values[] = { + { 0x8000, "vendor-specific"}, + { 0x4000, "non-transitive"}, { 0, NULL}, }; -static int -decode_prefix4(const u_char *pd, char *buf, u_int buflen) +static 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"}, + { 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 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 }, +}; + +#define TOKBUFSIZE 128 +static char astostr[20]; + +/* + * as_printf + * + * Convert an AS number into a string and return string pointer. + * + * Bepending on bflag is set or not, AS number is converted into ASDOT notation + * or plain number notation. + * + */ +static char * +as_printf (char *str, int size, u_int asnum) +{ + if (!bflag || asnum <= 0xFFFF) { + snprintf(str, size, "%u", asnum); + } else { + snprintf(str, size, "%u.%u", asnum >> 16, asnum & 0xFFFF); + } + return str; +} + +int +decode_prefix4(const u_char *pptr, char *buf, u_int buflen) { struct in_addr addr; u_int plen; - plen = pd[0]; - if (plen < 0 || 32 < plen) + TCHECK(pptr[0]); + plen = pptr[0]; + if (32 < plen) return -1; memset(&addr, 0, sizeof(addr)); - memcpy(&addr, &pd[1], (plen + 7) / 8); + TCHECK2(pptr[1], (plen + 7) / 8); + memcpy(&addr, &pptr[1], (plen + 7) / 8); if (plen % 8) { ((u_char *)&addr)[(plen + 7) / 8 - 1] &= ((0xff00 >> (plen % 8)) & 0xff); } snprintf(buf, buflen, "%s/%d", getname((u_char *)&addr), plen); return 1 + (plen + 7) / 8; + +trunc: + return -2; } static int -decode_labeled_prefix4(const u_char *pd, char *buf, u_int buflen) +decode_labeled_prefix4(const u_char *pptr, char *buf, u_int buflen) { struct in_addr addr; u_int plen; - plen = pd[0]; /* get prefix length */ + TCHECK(pptr[0]); + plen = pptr[0]; /* get prefix length */ /* this is one of the weirdnesses of rfc3107 the label length (actually the label + COS bits) - is added of the prefix length; + is added to the prefix length; we also do only read out just one label - - there is no real application for advertisment of + there is no real application for advertisement of 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; memset(&addr, 0, sizeof(addr)); - memcpy(&addr, &pd[4], (plen + 7) / 8); + TCHECK2(pptr[4], (plen + 7) / 8); + memcpy(&addr, &pptr[4], (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, "%s/%d label:%u %s", + snprintf(buf, buflen, "%s/%d, label:%u %s", getname((u_char *)&addr), plen, - EXTRACT_24BITS(pd+1)>>4, - ((pd[3]&1)==0) ? "(BOGUS: Bottom of Stack NOT set!)" : "(bottom)" ); + EXTRACT_24BITS(pptr+1)>>4, + ((pptr[3]&1)==0) ? "(BOGUS: Bottom of Stack NOT set!)" : "(bottom)" ); return 4 + (plen + 7) / 8; + +trunc: + return -2; } +/* + * bgp_vpn_ip_print + * + * print an ipv4 or ipv6 address into a buffer dependend on address length. + */ +static char * +bgp_vpn_ip_print (const u_char *pptr, u_int addr_length) { + + /* 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 */ + TCHECK2(pptr[0], sizeof(struct in_addr)); + snprintf(pos, sizeof(addr), "%s", ipaddr_string(pptr)); + break; #ifdef INET6 + case (sizeof(struct in6_addr) << 3): /* 128 */ + TCHECK2(pptr[0], sizeof(struct in6_addr)); + snprintf(pos, sizeof(addr), "%s", ip6addr_string(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 (const u_char *pptr, char *buf, u_int buflen) { + + u_int8_t addr_length; + u_int total_length, offset; + + total_length = 0; + + /* Source address length, encoded in bits */ + TCHECK2(pptr[0], 1); + addr_length = *pptr++; + + /* Source address */ + 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(pptr, addr_length)); + pptr += (addr_length >> 3); + } + + /* Group address length, encoded in bits */ + TCHECK2(pptr[0], 1); + addr_length = *pptr++; + + /* Group address */ + 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(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 (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)) { + + /* 2-byte-AS:number fmt*/ + case 0: + 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: + 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(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: + snprintf(pos, sizeof(rd) - (pos - rd), "unknown RD format"); + break; + } + pos += strlen(pos); + *(pos) = '\0'; + return (rd); +} + static int +decode_rt_routing_info(const u_char *pptr, char *buf, u_int buflen) +{ + u_int8_t route_target[8]; + u_int plen; + + 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)); + 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(astostr, sizeof(astostr), EXTRACT_32BITS(pptr+1)), + bgp_vpn_rd_print((u_char *)&route_target)); + + return 5 + (plen + 7) / 8; + +trunc: + return -2; +} + +static int +decode_labeled_vpn_prefix4(const u_char *pptr, char *buf, u_int buflen) +{ + struct in_addr addr; + u_int plen; + + TCHECK(pptr[0]); + plen = pptr[0]; /* get prefix length */ + + if ((24+64) > plen) + return -1; + + plen-=(24+64); /* adjust prefixlen - labellength - RD len*/ + + if (32 < plen) + return -1; + + memset(&addr, 0, sizeof(addr)); + 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(pptr+4), + getname((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(const u_char *pptr, char *buf, u_int buflen) +{ + + const u_char *rd; + const u_char *vpn_ip; + + TCHECK(pptr[0]); + + /* if the NLRI is not predefined length, quit.*/ + if (*pptr != MDT_VPN_NLRI_LEN * NBBY) + return -1; + pptr++; + + /* RD */ + TCHECK2(pptr[0], 8); + rd = pptr; + pptr+=8; + + /* IPv4 address */ + TCHECK2(pptr[0], sizeof(struct in_addr)); + vpn_ip = pptr; + pptr+=sizeof(struct in_addr); + + /* MDT Group Address */ + TCHECK2(pptr[0], sizeof(struct in_addr)); + + snprintf(buf, buflen, "RD: %s, VPN IP Address: %s, MC Group Address: %s", + bgp_vpn_rd_print(rd), ipaddr_string(vpn_ip), ipaddr_string(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 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_multicast_vpn(const u_char *pptr, char *buf, u_int buflen) +{ + u_int8_t route_type, route_length, addr_length, sg_length; + u_int offset; + + 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: + TCHECK2(pptr[0], BGP_VPN_RD_LEN); + offset = strlen(buf); + snprintf(buf + offset, buflen - offset, ", RD: %s, Originator %s", + bgp_vpn_rd_print(pptr), + bgp_vpn_ip_print(pptr + BGP_VPN_RD_LEN, + (route_length - BGP_VPN_RD_LEN) << 3)); + break; + case BGP_MULTICAST_VPN_ROUTE_TYPE_INTER_AS_I_PMSI: + 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(pptr), + as_printf(astostr, sizeof(astostr), + EXTRACT_32BITS(pptr + BGP_VPN_RD_LEN))); + break; + + case BGP_MULTICAST_VPN_ROUTE_TYPE_S_PMSI: + TCHECK2(pptr[0], BGP_VPN_RD_LEN); + offset = strlen(buf); + snprintf(buf + offset, buflen - offset, ", RD: %s", + bgp_vpn_rd_print(pptr)); + pptr += BGP_VPN_RD_LEN; + + sg_length = bgp_vpn_sg_print(pptr, buf, buflen); + addr_length = route_length - sg_length; + + TCHECK2(pptr[0], addr_length); + offset = strlen(buf); + snprintf(buf + offset, buflen - offset, ", Originator %s", + bgp_vpn_ip_print(pptr, addr_length << 3)); + break; + + case BGP_MULTICAST_VPN_ROUTE_TYPE_SOURCE_ACTIVE: + TCHECK2(pptr[0], BGP_VPN_RD_LEN); + offset = strlen(buf); + snprintf(buf + offset, buflen - offset, ", RD: %s", + bgp_vpn_rd_print(pptr)); + pptr += BGP_VPN_RD_LEN; + + bgp_vpn_sg_print(pptr, buf, buflen); + break; + + case BGP_MULTICAST_VPN_ROUTE_TYPE_SHARED_TREE_JOIN: /* fall through */ + case BGP_MULTICAST_VPN_ROUTE_TYPE_SOURCE_TREE_JOIN: + TCHECK2(pptr[0], BGP_VPN_RD_LEN); + offset = strlen(buf); + snprintf(buf + offset, buflen - offset, ", RD: %s, Source-AS %s", + bgp_vpn_rd_print(pptr), + as_printf(astostr, sizeof(astostr), + EXTRACT_32BITS(pptr + BGP_VPN_RD_LEN))); + pptr += BGP_VPN_RD_LEN; + + bgp_vpn_sg_print(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(const u_char *pptr, char *buf, u_int buflen) +{ + int plen,tlen,strlen,tlv_type,tlv_len,ttlv_len; + + TCHECK2(pptr[0], 2); + plen=EXTRACT_16BITS(pptr); + tlen=plen; + pptr+=2; + 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(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; + 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) { + 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; + +trunc: + return -2; +} + +#ifdef INET6 +int decode_prefix6(const u_char *pd, char *buf, u_int buflen) { struct in6_addr addr; u_int plen; + TCHECK(pd[0]); plen = pd[0]; - if (plen < 0 || 128 < plen) + if (128 < plen) return -1; memset(&addr, 0, sizeof(addr)); + TCHECK2(pd[1], (plen + 7) / 8); memcpy(&addr, &pd[1], (plen + 7) / 8); if (plen % 8) { addr.s6_addr[(plen + 7) / 8 - 1] &= @@ -376,30 +1028,249 @@ decode_prefix6(const u_char *pd, char *buf, u_int buflen) } snprintf(buf, buflen, "%s/%d", getname6((u_char *)&addr), plen); return 1 + (plen + 7) / 8; + +trunc: + return -2; +} + +static int +decode_labeled_prefix6(const u_char *pptr, char *buf, u_int buflen) +{ + struct in6_addr addr; + u_int plen; + + TCHECK(pptr[0]); + plen = pptr[0]; /* get prefix length */ + + if (24 > plen) + return -1; + + plen-=24; /* adjust prefixlen - labellength */ + + if (128 < plen) + return -1; + + memset(&addr, 0, sizeof(addr)); + TCHECK2(pptr[4], (plen + 7) / 8); + memcpy(&addr, &pptr[4], (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, "%s/%d, label:%u %s", + getname6((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; + +trunc: + return -2; +} + +static int +decode_labeled_vpn_prefix6(const u_char *pptr, char *buf, u_int buflen) +{ + struct in6_addr addr; + u_int plen; + + 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)); + 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(pptr+4), + getname6((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 *dat, int len) +static int +decode_clnp_prefix(const u_char *pptr, char *buf, u_int buflen) +{ + u_int8_t addr[19]; + u_int plen; + + TCHECK(pptr[0]); + plen = pptr[0]; /* get prefix length */ + + if (152 < plen) + return -1; + + memset(&addr, 0, sizeof(addr)); + 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(const u_char *pptr, char *buf, u_int buflen) +{ + u_int8_t addr[19]; + u_int plen; + + 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)); + 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(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 (u_int8_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) { + 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; + } + 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(const struct bgp_attr *attr, const u_char *pptr, int len) { int i; u_int16_t af; - u_int8_t safi, snpa; + u_int8_t safi, snpa, nhlen; + union { /* copy buffer for bandwidth values */ + float f; + u_int32_t i; + } bw; int advance; int tlen; - const u_char *p; + const u_char *tptr; char buf[MAXHOSTNAMELEN + 100]; + char tokbuf[TOKBUFSIZE]; + int as_size; - p = dat; + tptr = pptr; tlen=len; switch (attr->bgpa_type) { case BGPTYPE_ORIGIN: if (len != 1) printf("invalid len"); - else - printf("%s", tok2str(bgp_origin_values, "Unknown Origin Typecode", p[0])); + else { + TCHECK(*tptr); + printf("%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"); @@ -409,47 +1280,89 @@ bgp_attr_print(const struct bgp_attr *attr, const u_char *dat, int len) printf("empty"); break; } - while (p < dat + len) { - /* - * under RFC1965, p[0] means: - * 1: AS_SET 2: AS_SEQUENCE - * 3: AS_CONFED_SET 4: AS_CONFED_SEQUENCE - */ - if (p[0] == 3 || p[0] == 4) - printf("confed"); - printf("%s", (p[0] & 1) ? "{" : ""); - for (i = 0; i < p[1] * 2; i += 2) { - printf("%s%u", i == 0 ? "" : " ", - EXTRACT_16BITS(&p[2 + i])); - } - printf("%s", (p[0] & 1) ? "}" : ""); - p += 2 + p[1] * 2; + + /* + * 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(attr->bgpa_type, pptr, len); + + while (tptr < pptr + len) { + TCHECK(tptr[0]); + printf("%s", tok2strbuf(bgp_as_path_segment_open_values, + "?", tptr[0], + tokbuf, sizeof(tokbuf))); + for (i = 0; i < tptr[1] * as_size; i += as_size) { + TCHECK2(tptr[2 + i], as_size); + printf("%s ", + as_printf(astostr, sizeof(astostr), + as_size == 2 ? + EXTRACT_16BITS(&tptr[2 + i]) : + EXTRACT_32BITS(&tptr[2 + i]))); + } + TCHECK(tptr[0]); + printf("%s", tok2strbuf(bgp_as_path_segment_close_values, + "?", tptr[0], + tokbuf, sizeof(tokbuf))); + TCHECK(tptr[1]); + tptr += 2 + tptr[1] * as_size; } break; case BGPTYPE_NEXT_HOP: if (len != 4) printf("invalid len"); - else - printf("%s", getname(p)); + else { + TCHECK2(tptr[0], 4); + printf("%s", getname(tptr)); + } break; case BGPTYPE_MULTI_EXIT_DISC: case BGPTYPE_LOCAL_PREF: if (len != 4) printf("invalid len"); - else - printf("%u", EXTRACT_32BITS(p)); + else { + TCHECK2(tptr[0], 4); + printf("%u", EXTRACT_32BITS(tptr)); + } break; case BGPTYPE_ATOMIC_AGGREGATE: if (len != 0) printf("invalid len"); break; - case BGPTYPE_AGGREGATOR: - if (len != 6) { + 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) { + printf("invalid len"); + break; + } + TCHECK2(tptr[0], len); + if (len == 6) { + printf(" AS #%s, origin %s", + as_printf(astostr, sizeof(astostr), EXTRACT_16BITS(tptr)), + getname(tptr + 2)); + } else { + printf(" AS #%s, origin %s", + as_printf(astostr, sizeof(astostr), + EXTRACT_32BITS(tptr)), getname(tptr + 4)); + } + break; + case BGPTYPE_AGGREGATOR4: + if (len != 8) { printf("invalid len"); break; } - printf(" AS #%u, origin %s", EXTRACT_16BITS(p), - getname(p + 2)); + TCHECK2(tptr[0], 8); + printf(" AS #%s, origin %s", + as_printf(astostr, sizeof(astostr), EXTRACT_32BITS(tptr)), + getname(tptr + 4)); break; case BGPTYPE_COMMUNITIES: if (len % 4) { @@ -458,7 +1371,8 @@ bgp_attr_print(const struct bgp_attr *attr, const u_char *dat, int len) } while (tlen>0) { u_int32_t comm; - comm = EXTRACT_32BITS(p); + TCHECK2(tptr[0], 4); + comm = EXTRACT_32BITS(tptr); switch (comm) { case BGP_COMMUNITY_NO_EXPORT: printf(" NO_EXPORT"); @@ -477,7 +1391,7 @@ bgp_attr_print(const struct bgp_attr *attr, const u_char *dat, int len) break; } tlen -=4; - p +=4; + tptr +=4; } break; case BGPTYPE_ORIGINATOR_ID: @@ -485,227 +1399,726 @@ bgp_attr_print(const struct bgp_attr *attr, const u_char *dat, int len) printf("invalid len"); break; } - printf("%s",getname(p)); + TCHECK2(tptr[0], 4); + printf("%s",getname(tptr)); break; case BGPTYPE_CLUSTER_LIST: + if (len % 4) { + printf("invalid len"); + break; + } while (tlen>0) { + TCHECK2(tptr[0], 4); printf("%s%s", - getname(p), + getname(tptr), (tlen>4) ? ", " : ""); tlen -=4; - p +=4; + tptr +=4; } break; case BGPTYPE_MP_REACH_NLRI: - af = EXTRACT_16BITS(p); - safi = p[2]; + 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), + 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), + tok2strbuf(bgp_safi_values, "Unknown SAFI", safi, + tokbuf, sizeof(tokbuf)), safi); - if (af == AFNUM_INET) - ; + 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); - print_unknown_data(p,"\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: + TCHECK2(tptr[0], tlen); + printf("\n\t no AFI %u / SAFI %u decoder",af,safi); + if (vflag <= 1) + print_unknown_data(tptr,"\n\t ",tlen); + goto done; break; } - p +=3; - tlen = p[0]; + tptr +=3; + + TCHECK(tptr[0]); + nhlen = tptr[0]; + tlen = nhlen; + tptr++; + if (tlen) { - printf("\n\t nexthop: "); - i = 0; - while (i < tlen) { - switch (af) { - case AFNUM_INET: - switch(safi) { - case SAFNUM_UNICAST: - case SAFNUM_MULTICAST: - case SAFNUM_UNIMULTICAST: - case SAFNUM_LABUNICAST: - printf("%s", getname(p + 1 + i)); - i += sizeof(struct in_addr); - break; - default: - printf("no SAFI %u decoder",safi); - print_unknown_data(p,"\n\t ",tlen); - i = tlen; - break; - } - break; + printf("\n\t nexthop: "); + while (tlen > 0) { + 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)) { + printf("invalid len"); + tlen = 0; + } else { + TCHECK2(tptr[0], sizeof(struct in_addr)); + printf("%s",getname(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)) { + printf("invalid len"); + tlen = 0; + } else { + TCHECK2(tptr[0], sizeof(struct in_addr)+BGP_VPN_RD_LEN); + 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; #ifdef INET6 - case AFNUM_INET6: - switch(safi) { - case SAFNUM_UNICAST: - case SAFNUM_MULTICAST: - case SAFNUM_UNIMULTICAST: - case SAFNUM_LABUNICAST: - printf("%s", getname6(p + 1 + i)); - i += sizeof(struct in6_addr); - break; - default: - printf("no SAFI %u decoder",safi); - print_unknown_data(p,"\n\t ",tlen); - i = tlen; - 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)) { + printf("invalid len"); + tlen = 0; + } else { + TCHECK2(tptr[0], sizeof(struct in6_addr)); + printf("%s", getname6(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)) { + printf("invalid len"); + tlen = 0; + } else { + TCHECK2(tptr[0], sizeof(struct in6_addr)+BGP_VPN_RD_LEN); + 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; #endif - default: - printf("no AFI %u decoder",af); - print_unknown_data(p,"\n\t ",tlen); - i = tlen; /*exit loop*/ - 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)) { + printf("invalid len"); + tlen = 0; + } else { + TCHECK2(tptr[0], sizeof(struct in_addr)); + printf("%s", getname(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): + TCHECK2(tptr[0], tlen); + printf("%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) { + printf("invalid len"); + tlen = 0; + } else { + TCHECK2(tptr[0], tlen); + printf("RD: %s, %s", + bgp_vpn_rd_print(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) + printf(" = %s", getname(tptr+BGP_VPN_RD_LEN+4)); +#ifdef INET6 + /* rfc1888 mapped IPv6 address ? */ + else if (EXTRACT_24BITS(tptr+BGP_VPN_RD_LEN) == 0x350000) + printf(" = %s", getname6(tptr+BGP_VPN_RD_LEN+3)); +#endif + tptr += tlen; + tlen = 0; + } + break; + default: + TCHECK2(tptr[0], tlen); + printf("no AFI %u/SAFI %u decoder",af,safi); + if (vflag <= 1) + print_unknown_data(tptr,"\n\t ",tlen); + tptr += tlen; + tlen = 0; + goto done; + break; + } + } } - p += 1 + tlen; + printf(", nh-length: %u", nhlen); + tptr += tlen; + + TCHECK(tptr[0]); + snpa = tptr[0]; + tptr++; - snpa = p[0]; - p++; if (snpa) { printf("\n\t %u SNPA", snpa); for (/*nothing*/; snpa > 0; snpa--) { - printf("\n\t %d bytes", p[0]); - p += p[0] + 1; + TCHECK(tptr[0]); + printf("\n\t %d bytes", tptr[0]); + tptr += tptr[0] + 1; } } else { - printf(", no SNPA"); + printf(", no SNPA"); } - while (len - (p - dat) > 0) { - switch (af) { - case AFNUM_INET: - switch (safi) { - case SAFNUM_UNICAST: - case SAFNUM_MULTICAST: - case SAFNUM_UNIMULTICAST: - advance = decode_prefix4(p, buf, sizeof(buf)); - printf("\n\t %s", buf); - break; - case SAFNUM_LABUNICAST: - advance = decode_labeled_prefix4(p, buf, sizeof(buf)); - printf("\n\t %s", buf); - break; - default: - printf("\n\t no SAFI %u decoder",safi); - print_unknown_data(p-3,"\n\t ",tlen); - advance = 0; - p = dat + 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(tptr, buf, sizeof(buf)); + if (advance == -1) + printf("\n\t (illegal prefix length)"); + else if (advance == -2) + goto trunc; + else + printf("\n\t %s", buf); + break; + case (AFNUM_INET<<8 | SAFNUM_LABUNICAST): + advance = decode_labeled_prefix4(tptr, buf, sizeof(buf)); + if (advance == -1) + printf("\n\t (illegal prefix length)"); + else if (advance == -2) + goto trunc; + else + printf("\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(tptr, buf, sizeof(buf)); + if (advance == -1) + printf("\n\t (illegal prefix length)"); + else if (advance == -2) + goto trunc; + else + printf("\n\t %s", buf); + break; + case (AFNUM_INET<<8 | SAFNUM_RT_ROUTING_INFO): + advance = decode_rt_routing_info(tptr, buf, sizeof(buf)); + if (advance == -1) + printf("\n\t (illegal prefix length)"); + else if (advance == -2) + goto trunc; + else + printf("\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(tptr, buf, sizeof(buf)); + if (advance == -1) + printf("\n\t (illegal prefix length)"); + else if (advance == -2) + goto trunc; + else + printf("\n\t %s", buf); + break; + + case (AFNUM_INET<<8 | SAFNUM_MDT): + advance = decode_mdt_vpn_nlri(tptr, buf, sizeof(buf)); + if (advance == -1) + printf("\n\t (illegal prefix length)"); + else if (advance == -2) + goto trunc; + else + printf("\n\t %s", buf); + break; #ifdef INET6 - case AFNUM_INET6: - switch (safi) { - case SAFNUM_UNICAST: - case SAFNUM_MULTICAST: - case SAFNUM_UNIMULTICAST: - advance = decode_prefix6(p, buf, sizeof(buf)); - printf("\n\t %s", buf); - break; - default: - printf("\n\t no SAFI %u decoder ",safi); - print_unknown_data(p-3,"\n\t ",tlen); - advance = 0; - p = dat + len; - break; - } - break; + case (AFNUM_INET6<<8 | SAFNUM_UNICAST): + case (AFNUM_INET6<<8 | SAFNUM_MULTICAST): + case (AFNUM_INET6<<8 | SAFNUM_UNIMULTICAST): + advance = decode_prefix6(tptr, buf, sizeof(buf)); + if (advance == -1) + printf("\n\t (illegal prefix length)"); + else if (advance == -2) + goto trunc; + else + printf("\n\t %s", buf); + break; + case (AFNUM_INET6<<8 | SAFNUM_LABUNICAST): + advance = decode_labeled_prefix6(tptr, buf, sizeof(buf)); + if (advance == -1) + printf("\n\t (illegal prefix length)"); + else if (advance == -2) + goto trunc; + else + printf("\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(tptr, buf, sizeof(buf)); + if (advance == -1) + printf("\n\t (illegal prefix length)"); + else if (advance == -2) + goto trunc; + else + printf("\n\t %s", buf); + break; #endif - default: - printf("\n\t no AFI %u decoder ",af); - print_unknown_data(p-3,"\n\t ",tlen); - advance = 0; - p = dat + len; - break; - } - - p += 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(tptr, buf, sizeof(buf)); + if (advance == -1) + printf("\n\t (illegal length)"); + else if (advance == -2) + goto trunc; + else + printf("\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(tptr, buf, sizeof(buf)); + if (advance == -1) + printf("\n\t (illegal prefix length)"); + else if (advance == -2) + goto trunc; + else + printf("\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(tptr, buf, sizeof(buf)); + if (advance == -1) + printf("\n\t (illegal prefix length)"); + else if (advance == -2) + goto trunc; + else + printf("\n\t %s", buf); + break; + default: + TCHECK2(*tptr,tlen); + printf("\n\t no AFI %u / SAFI %u decoder",af,safi); + if (vflag <= 1) + print_unknown_data(tptr,"\n\t ",tlen); + advance = 0; + tptr = pptr + len; + break; + } + if (advance < 0) + break; + tptr += advance; } - + done: break; case BGPTYPE_MP_UNREACH_NLRI: - af = EXTRACT_16BITS(p); - safi = p[2]; + 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), + 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), + tok2strbuf(bgp_safi_values, "Unknown SAFI", safi, + tokbuf, sizeof(tokbuf)), safi); - p += 3; + if (len == BGP_MP_NLRI_MINSIZE) + printf("\n\t End-of-Rib Marker (empty NLRI)"); - printf("\n\t Withdrawn routes"); + tptr += 3; - while (len - (p - dat) > 0) { - switch (af) { - case AFNUM_INET: - switch (safi) { - case SAFNUM_UNICAST: - case SAFNUM_MULTICAST: - case SAFNUM_UNIMULTICAST: - advance = decode_prefix4(p, buf, sizeof(buf)); - printf("\n\t %s", buf); - break; - case SAFNUM_LABUNICAST: - advance = decode_labeled_prefix4(p, buf, sizeof(buf)); - printf("\n\t %s", buf); - break; - default: - printf("\n\t no SAFI %u decoder",safi); - print_unknown_data(p-3,"\n\t ",tlen); - advance = 0; - p = dat + 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(tptr, buf, sizeof(buf)); + if (advance == -1) + printf("\n\t (illegal prefix length)"); + else if (advance == -2) + goto trunc; + else + printf("\n\t %s", buf); + break; + case (AFNUM_INET<<8 | SAFNUM_LABUNICAST): + advance = decode_labeled_prefix4(tptr, buf, sizeof(buf)); + if (advance == -1) + printf("\n\t (illegal prefix length)"); + else if (advance == -2) + goto trunc; + else + printf("\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(tptr, buf, sizeof(buf)); + if (advance == -1) + printf("\n\t (illegal prefix length)"); + else if (advance == -2) + goto trunc; + else + printf("\n\t %s", buf); + break; #ifdef INET6 - case AFNUM_INET6: - switch (safi) { - case SAFNUM_UNICAST: - case SAFNUM_MULTICAST: - case SAFNUM_UNIMULTICAST: - advance = decode_prefix6(p, buf, sizeof(buf)); - printf("\n\t %s", buf); - break; - default: - printf("\n\t no SAFI %u decoder",safi); - print_unknown_data(p-3,"\n\t ",tlen); - advance = 0; - p = dat + len; - break; - } - break; + case (AFNUM_INET6<<8 | SAFNUM_UNICAST): + case (AFNUM_INET6<<8 | SAFNUM_MULTICAST): + case (AFNUM_INET6<<8 | SAFNUM_UNIMULTICAST): + advance = decode_prefix6(tptr, buf, sizeof(buf)); + if (advance == -1) + printf("\n\t (illegal prefix length)"); + else if (advance == -2) + goto trunc; + else + printf("\n\t %s", buf); + break; + case (AFNUM_INET6<<8 | SAFNUM_LABUNICAST): + advance = decode_labeled_prefix6(tptr, buf, sizeof(buf)); + if (advance == -1) + printf("\n\t (illegal prefix length)"); + else if (advance == -2) + goto trunc; + else + printf("\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(tptr, buf, sizeof(buf)); + if (advance == -1) + printf("\n\t (illegal prefix length)"); + else if (advance == -2) + goto trunc; + else + printf("\n\t %s", buf); + break; #endif - default: - printf("\n\t no AFI %u decoder",af); - print_unknown_data(p-3,"\n\t ",tlen); - advance = 0; - p = dat + len; - break; - } - - p += 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(tptr, buf, sizeof(buf)); + if (advance == -1) + printf("\n\t (illegal length)"); + else if (advance == -2) + goto trunc; + else + printf("\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(tptr, buf, sizeof(buf)); + if (advance == -1) + printf("\n\t (illegal prefix length)"); + else if (advance == -2) + goto trunc; + else + printf("\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(tptr, buf, sizeof(buf)); + if (advance == -1) + printf("\n\t (illegal prefix length)"); + else if (advance == -2) + goto trunc; + else + printf("\n\t %s", buf); + break; + case (AFNUM_INET<<8 | SAFNUM_MDT): + advance = decode_mdt_vpn_nlri(tptr, buf, sizeof(buf)); + if (advance == -1) + printf("\n\t (illegal prefix length)"); + else if (advance == -2) + goto trunc; + else + printf("\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(tptr, buf, sizeof(buf)); + if (advance == -1) + printf("\n\t (illegal prefix length)"); + else if (advance == -2) + goto trunc; + else + printf("\n\t %s", buf); + break; + default: + TCHECK2(*(tptr-3),tlen); + printf("no AFI %u / SAFI %u decoder",af,safi); + if (vflag <= 1) + print_unknown_data(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"); + break; + } + while (tlen>0) { + u_int16_t extd_comm; + + TCHECK2(tptr[0], 2); + extd_comm=EXTRACT_16BITS(tptr); + + printf("\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)); + + TCHECK2(*(tptr+2), 6); + switch(extd_comm) { + case BGP_EXT_COM_RT_0: + case BGP_EXT_COM_RO_0: + printf(": %u:%u (= %s)", + EXTRACT_16BITS(tptr+2), + EXTRACT_32BITS(tptr+4), + getname(tptr+4)); + break; + case BGP_EXT_COM_RT_1: + case BGP_EXT_COM_RO_1: + case BGP_EXT_COM_VRF_RT_IMP: + printf(": %s:%u", + getname(tptr+2), + EXTRACT_16BITS(tptr+6)); + break; + case BGP_EXT_COM_RT_2: + case BGP_EXT_COM_RO_2: + printf(": %s:%u", + as_printf(astostr, sizeof(astostr), + EXTRACT_32BITS(tptr+2)), EXTRACT_16BITS(tptr+6)); + break; + case BGP_EXT_COM_LINKBAND: + bw.i = EXTRACT_32BITS(tptr+2); + printf(": 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: + printf("%s", getname(tptr+2)); + break; + case BGP_EXT_COM_OSPF_RTYPE: + case BGP_EXT_COM_OSPF_RTYPE2: + printf(": area:%s, router-type:%s, metric-type:%s%s", + getname(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: + printf(": %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; + case BGP_EXT_COM_SOURCE_AS: + printf(": AS %u", EXTRACT_16BITS(tptr+2)); + break; + default: + TCHECK2(*tptr,8); + print_unknown_data(tptr,"\n\t ",8); + break; + } + tlen -=8; + tptr +=8; + } + break; + + case BGPTYPE_PMSI_TUNNEL: + { + u_int8_t tunnel_type, flags; + + tunnel_type = *(tptr+1); + flags = *tptr; + tlen = len; + + TCHECK2(tptr[0], 5); + printf("\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: + TCHECK2(tptr[0], 8); + printf("\n\t Sender %s, P-Group %s", + ipaddr_string(tptr), + ipaddr_string(tptr+4)); + break; + + case BGP_PMSI_TUNNEL_PIM_SSM: + TCHECK2(tptr[0], 8); + printf("\n\t Root-Node %s, P-Group %s", + ipaddr_string(tptr), + ipaddr_string(tptr+4)); + break; + case BGP_PMSI_TUNNEL_INGRESS: + TCHECK2(tptr[0], 4); + printf("\n\t Tunnel-Endpoint %s", + ipaddr_string(tptr)); + break; + case BGP_PMSI_TUNNEL_LDP_P2MP: /* fall through */ + case BGP_PMSI_TUNNEL_LDP_MP2MP: + TCHECK2(tptr[0], 8); + printf("\n\t Root-Node %s, LSP-ID 0x%08x", + ipaddr_string(tptr), + EXTRACT_32BITS(tptr+4)); + break; + case BGP_PMSI_TUNNEL_RSVP_P2MP: + TCHECK2(tptr[0], 8); + printf("\n\t Extended-Tunnel-ID %s, P2MP-ID 0x%08x", + ipaddr_string(tptr), + EXTRACT_32BITS(tptr+4)); + break; + default: + if (vflag <= 1) { + print_unknown_data(tptr,"\n\t ",tlen); + } + } + break; + } + case BGPTYPE_ATTR_SET: + TCHECK2(tptr[0], 4); + printf("\n\t Origin AS: %s", + as_printf(astostr, sizeof(astostr), EXTRACT_32BITS(tptr))); + tptr+=4; + len -=4; + + while (len >= 2 ) { + int alen; + struct bgp_attr bgpa; + + TCHECK2(tptr[0], sizeof(bgpa)); + memcpy(&bgpa, tptr, sizeof(bgpa)); + alen = bgp_attr_len(&bgpa); + tptr += bgp_attr_off(&bgpa); + len -= bgp_attr_off(&bgpa); + + printf("\n\t %s (%u), length: %u", + tok2strbuf(bgp_attr_values, + "Unknown Attribute", bgpa.bgpa_type, + tokbuf, sizeof(tokbuf)), + 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("]: "); + } + /* FIXME check for recursion */ + if (!bgp_attr_print(&bgpa, tptr, alen)) + return 0; + tptr += alen; + len -= alen; + } + break; + + default: + TCHECK2(*pptr,len); printf("\n\t no Attribute %u decoder",attr->bgpa_type); /* we have no decoder for the attribute */ - print_unknown_data(p,"\n\t ",tlen); - break; + if (vflag <= 1) + print_unknown_data(pptr,"\n\t ",len); + break; } + if (vflag > 1 && len) { /* omit zero length attributes*/ + TCHECK2(*pptr,len); + print_unknown_data(pptr,"\n\t ",len); + } + return 1; + +trunc: + return 0; } static void @@ -713,19 +2126,24 @@ bgp_open_print(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,cap_type,cap_len,tcap_len,cap_offset; + char tokbuf[TOKBUFSIZE]; + char tokbuf2[TOKBUFSIZE]; 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("my AS %s, ", + as_printf(astostr, sizeof(astostr), 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); + printf("\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; @@ -736,12 +2154,14 @@ bgp_open_print(const u_char *dat, int length) 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 %d", bgpopt.bgpopt_type, bgpopt.bgpopt_len); + printf("\n\t Option %d, length: %u", bgpopt.bgpopt_type, bgpopt.bgpopt_len); break; } - printf("\n\t Option %s (%u), length %d", - tok2str(bgp_opt_values,"Unknown", bgpopt.bgpopt_type), + printf("\n\t Option %s (%u), length: %u", + tok2strbuf(bgp_opt_values,"Unknown", + bgpopt.bgpopt_type, + tokbuf, sizeof(tokbuf)), bgpopt.bgpopt_type, bgpopt.bgpopt_len); @@ -750,25 +2170,72 @@ bgp_open_print(const u_char *dat, int length) 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), + tcap_len=cap_len; + printf("\n\t %s (%u), length: %u", + tok2strbuf(bgp_capcode_values, "Unknown", + cap_type, tokbuf, sizeof(tokbuf)), + 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)), + tok2strbuf(af_values, "Unknown", + EXTRACT_16BITS(opt+i+BGP_OPT_SIZE+2), + tokbuf, sizeof(tokbuf)), EXTRACT_16BITS(opt+i+BGP_OPT_SIZE+2), - tok2str(bgp_safi_values,"Unknown", opt[i+BGP_OPT_SIZE+5]), + tok2strbuf(bgp_safi_values, "Unknown", + opt[i+BGP_OPT_SIZE+5], + tokbuf, sizeof(tokbuf)), opt[i+BGP_OPT_SIZE+5]); break; + case BGP_CAPCODE_RESTART: + printf("\n\t\tRestart Flags: [%s], Restart Time %us", + ((opt[i+BGP_OPT_SIZE+2])&0x80) ? "R" : "none", + EXTRACT_16BITS(opt+i+BGP_OPT_SIZE+2)&0xfff); + tcap_len-=2; + cap_offset=4; + while(tcap_len>=4) { + printf("\n\t\t AFI %s (%u), SAFI %s (%u), Forwarding state preserved: %s", + tok2strbuf(af_values,"Unknown", + EXTRACT_16BITS(opt+i+BGP_OPT_SIZE+cap_offset), + tokbuf, sizeof(tokbuf)), + EXTRACT_16BITS(opt+i+BGP_OPT_SIZE+cap_offset), + tok2strbuf(bgp_safi_values,"Unknown", + opt[i+BGP_OPT_SIZE+cap_offset+2], + tokbuf2, sizeof(tokbuf2)), + opt[i+BGP_OPT_SIZE+cap_offset+2], + ((opt[i+BGP_OPT_SIZE+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. + */ + TCHECK2(opt[i + BGP_OPT_SIZE + 2], cap_len); + if (cap_len == 4) { + printf("\n\t\t 4 Byte AS %s", + as_printf(astostr, sizeof(astostr), + EXTRACT_32BITS(opt + i + BGP_OPT_SIZE + 2))); + } + break; default: + TCHECK2(opt[i+BGP_OPT_SIZE+2],cap_len); printf("\n\t\tno decoder for Capability %u", cap_type); + if (vflag <= 1) + print_unknown_data(&opt[i+BGP_OPT_SIZE+2],"\n\t\t",cap_len); break; } + if (vflag > 1) { + TCHECK2(opt[i+BGP_OPT_SIZE+2],cap_len); + print_unknown_data(&opt[i+BGP_OPT_SIZE+2],"\n\t\t",cap_len); + } break; case BGP_OPT_AUTH: default: @@ -789,14 +2256,13 @@ bgp_update_print(const u_char *dat, int length) { struct bgp bgp; struct bgp_attr bgpa; - int hlen; const u_char *p; int len; int i; + char tokbuf[TOKBUFSIZE]; TCHECK2(dat[0], BGP_SIZE); memcpy(&bgp, dat, BGP_SIZE); - hlen = ntohs(bgp.bgp_len); p = dat + BGP_SIZE; /*XXX*/ /* Unfeasible routes */ @@ -811,6 +2277,7 @@ bgp_update_print(const u_char *dat, int length) printf("\n\t Withdrawn routes: %d bytes", len); #else char buf[MAXHOSTNAMELEN + 100]; + int wpfx; TCHECK2(p[2], len); i = 2; @@ -818,8 +2285,16 @@ bgp_update_print(const u_char *dat, int length) printf("\n\t Withdrawn routes:"); while(i < 2 + len) { - i += decode_prefix4(&p[i], buf, sizeof(buf)); - printf("\n\t %s", buf); + wpfx = decode_prefix4(&p[i], buf, sizeof(buf)); + if (wpfx == -1) { + printf("\n\t (illegal prefix length)"); + break; + } else if (wpfx == -2) + goto trunc; + else { + i += wpfx; + printf("\n\t %s", buf); + } } #endif } @@ -827,6 +2302,12 @@ bgp_update_print(const u_char *dat, int length) TCHECK2(p[0], 2); len = EXTRACT_16BITS(p); + + if (len == 0 && length == BGP_UPDATE_MINSIZE) { + printf("\n\t End-of-Rib Marker (empty NLRI)"); + return; + } + if (len) { /* do something more useful!*/ i = 2; @@ -839,12 +2320,14 @@ bgp_update_print(const u_char *dat, int length) aoff = bgp_attr_off(&bgpa); printf("\n\t %s (%u), length: %u", - tok2str(bgp_attr_values, "Unknown Attribute", bgpa.bgpa_type), + tok2strbuf(bgp_attr_values, "Unknown Attribute", + bgpa.bgpa_type, + tokbuf, sizeof(tokbuf)), bgpa.bgpa_type, alen); if (bgpa.bgpa_flags) { - printf(", flags [%s%s%s%s", + printf(", Flags [%s%s%s%s", bgpa.bgpa_flags & 0x80 ? "O" : "", bgpa.bgpa_flags & 0x40 ? "T" : "", bgpa.bgpa_flags & 0x20 ? "P" : "", @@ -853,21 +2336,27 @@ bgp_update_print(const u_char *dat, int length) printf("+%x", bgpa.bgpa_flags & 0xf); printf("]: "); } - bgp_attr_print(&bgpa, &p[i + aoff], alen); + if (!bgp_attr_print(&bgpa, &p[i + aoff], alen)) + goto trunc; i += aoff + alen; } - } + } p += 2 + len; if (dat + length > p) { - printf("\n\t Updated routes:"); + printf("\n\t Updated routes:"); while (dat + length > p) { char buf[MAXHOSTNAMELEN + 100]; i = decode_prefix4(p, buf, sizeof(buf)); - printf("\n\t %s", buf); - if (i < 0) + if (i == -1) { + printf("\n\t (illegal prefix length)"); break; - p += i; + } else if (i == -2) + goto trunc; + else { + printf("\n\t %s", buf); + p += i; + } } } return; @@ -879,24 +2368,68 @@ static void bgp_notification_print(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); 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 + 7) { + tptr = dat + BGP_NOTIFICATION_SIZE; + TCHECK2(*tptr, 7); + printf(", 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; @@ -908,14 +2441,53 @@ trunc: } static void +bgp_route_refresh_print(const u_char *pptr, int len) { + + const struct bgp_route_refresh *bgp_route_refresh_header; + char tokbuf[TOKBUFSIZE]; + char tokbuf2[TOKBUFSIZE]; + + TCHECK2(pptr[0], BGP_ROUTE_REFRESH_SIZE); + + /* some little sanity checking */ + if (lenafi), + tokbuf, sizeof(tokbuf)), + EXTRACT_16BITS(&bgp_route_refresh_header->afi), + tok2strbuf(bgp_safi_values,"Unknown", + bgp_route_refresh_header->safi, + tokbuf2, sizeof(tokbuf2)), + bgp_route_refresh_header->safi); + + if (vflag > 1) { + TCHECK2(*pptr, len); + print_unknown_data(pptr,"\n\t ", len); + } + + return; +trunc: + printf("[|BGP]"); +} + +static int bgp_header_print(const u_char *dat, int length) { struct bgp bgp; + char tokbuf[TOKBUFSIZE]; 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), + printf("\n\t%s Message (%u), length: %u", + tok2strbuf(bgp_msg_values, "Unknown", bgp.bgp_type, + tokbuf, sizeof(tokbuf)), bgp.bgp_type, length); @@ -931,15 +2503,20 @@ bgp_header_print(const u_char *dat, int length) break; case BGP_KEEPALIVE: break; + case BGP_ROUTE_REFRESH: + bgp_route_refresh_print(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 */ + TCHECK2(*dat, length); + printf("\n\t no Message %u decoder",bgp.bgp_type); + print_unknown_data(dat,"\n\t ",length); break; } - return; + return 1; trunc: printf("[|BGP]"); + return 0; } void @@ -954,16 +2531,20 @@ bgp_print(const u_char *dat, int length) }; struct bgp bgp; u_int16_t hlen; + char tokbuf[TOKBUFSIZE]; ep = dat + length; if (snapend < dat + length) ep = snapend; - printf(": BGP"); + printf(": BGP, length: %u",length); + + if (vflag < 1) /* lets be less chatty */ + return; p = dat; start = p; - while (p < snapend) { + while (p < ep) { if (!TTEST2(p[0], 1)) break; if (p[0] != 0xff) { @@ -986,13 +2567,23 @@ bgp_print(const u_char *dat, int length) printf(" [|BGP]"); hlen = ntohs(bgp.bgp_len); + if (hlen < BGP_SIZE) { + printf("\n[|BGP Bogus header length %u < %u]", hlen, + BGP_SIZE); + break; + } if (TTEST2(p[0], hlen)) { - bgp_header_print(p, hlen); + if (!bgp_header_print(p, hlen)) + return; p += hlen; start = p; } else { - printf("[|BGP %s]", tok2str(bgp_msg_values, "Unknown Message Type",bgp.bgp_type)); + printf("\n[|BGP %s]", + tok2strbuf(bgp_msg_values, + "Unknown Message Type", + bgp.bgp_type, + tokbuf, sizeof(tokbuf))); break; } } @@ -1003,13 +2594,9 @@ trunc: printf(" [|BGP]"); } - - - - - - - - - - +/* + * Local Variables: + * c-style: whitesmith + * c-basic-offset: 4 + * End: + */