X-Git-Url: https://git.tcpdump.org/tcpdump/blobdiff_plain/5f3c628f705db32bc1670a51a93d40a8e9f81980..ffa1470e5c7ff0e50028d085a481dc797b0b51ed:/print-bgp.c diff --git a/print-bgp.c b/print-bgp.c index ef041e42..e4c08f27 100644 --- a/print-bgp.c +++ b/print-bgp.c @@ -35,8 +35,8 @@ #endif #ifndef lint -static const char rcsid[] = - "@(#) $Header: /tcpdump/master/tcpdump/print-bgp.c,v 1.68 2003-06-17 13:12:59 hannes Exp $"; +static const char rcsid[] _U_ = + "@(#) $Header: /tcpdump/master/tcpdump/print-bgp.c,v 1.91.2.9 2006-02-02 12:36:46 hannes Exp $"; #endif #include @@ -45,8 +45,11 @@ static const char rcsid[] = #include #include "interface.h" +#include "decode_prefix.h" #include "addrtoname.h" #include "extract.h" +#include "bgp.h" +#include "l2vpn.h" struct bgp { u_int8_t bgp_marker[16]; @@ -90,6 +93,8 @@ 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; @@ -139,6 +144,9 @@ 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_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"}, @@ -157,10 +165,32 @@ 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_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 */ + +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 @@ -173,13 +203,19 @@ 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} }; @@ -270,10 +306,15 @@ static struct tok bgp_origin_values[] = { #define SAFNUM_UNIMULTICAST 3 /* labeled BGP RFC3107 */ #define SAFNUM_LABUNICAST 4 +#define SAFNUM_TUNNEL 64 /* XXX */ +#define SAFNUM_VPLS 65 /* XXX */ +#define SAFNUM_MDT 66 /* XXX */ /* 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 @@ -283,9 +324,13 @@ 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"}, /* draft-marques-ppvpn-rt-constrain-01.txt */ { 0, NULL } }; @@ -310,6 +355,7 @@ static struct tok bgp_safi_values[] = { #define AFNUM_DECNET 13 #define AFNUM_BANYAN 14 #define AFNUM_E164NSAP 15 +#define AFNUM_VPLS 25 /* draft-kompella-ppvpn-l2vpn */ #define AFNUM_L2VPN 196 /* still to be approved by IANA */ @@ -331,6 +377,7 @@ static struct tok bgp_afi_values[] = { { AFNUM_BANYAN, "Banyan Vines"}, { AFNUM_E164NSAP, "E.164 with NSAP subaddress"}, { AFNUM_L2VPN, "Layer-2 VPN"}, + { AFNUM_VPLS, "VPLS"}, { 0, NULL}, }; @@ -343,6 +390,7 @@ static struct tok bgp_afi_values[] = { #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_CISCO_MCAST 0x0009 /* cisco proprietary */ #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 */ @@ -357,6 +405,14 @@ static struct tok bgp_afi_values[] = { #define BGP_EXT_COM_L2INFO 0x800a /* draft-kompella-ppvpn-l2vpn */ +/* 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"}, @@ -371,6 +427,7 @@ static struct tok bgp_extd_comm_subtype_values[] = { { BGP_EXT_COM_RO_1, "origin"}, { BGP_EXT_COM_RO_2, "origin"}, { BGP_EXT_COM_LINKBAND, "link-BW"}, + { BGP_EXT_COM_CISCO_MCAST, "mdt-group"}, { BGP_EXT_COM_VPN_ORIGIN, "ospf-domain"}, { BGP_EXT_COM_VPN_ORIGIN2, "ospf-domain"}, { BGP_EXT_COM_VPN_ORIGIN3, "ospf-domain"}, @@ -380,6 +437,12 @@ static struct tok bgp_extd_comm_subtype_values[] = { { 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)" }, { 0, NULL}, }; @@ -402,35 +465,19 @@ static struct tok bgp_extd_comm_ospf_rtype_values[] = { { 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}, -}; - -static int +int decode_prefix4(const u_char *pptr, char *buf, u_int buflen) { struct in_addr addr; u_int plen; + TCHECK(pptr[0]); plen = pptr[0]; if (32 < plen) return -1; memset(&addr, 0, sizeof(addr)); + TCHECK2(pptr[1], (plen + 7) / 8); memcpy(&addr, &pptr[1], (plen + 7) / 8); if (plen % 8) { ((u_char *)&addr)[(plen + 7) / 8 - 1] &= @@ -438,6 +485,9 @@ decode_prefix4(const u_char *pptr, char *buf, u_int buflen) } snprintf(buf, buflen, "%s/%d", getname((u_char *)&addr), plen); return 1 + (plen + 7) / 8; + +trunc: + return -2; } static int @@ -446,6 +496,7 @@ decode_labeled_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 */ /* this is one of the weirdnesses of rfc3107 @@ -456,12 +507,16 @@ decode_labeled_prefix4(const u_char *pptr, char *buf, u_int buflen) stacked labels in a a single BGP message */ + if (24 > plen) + return -1; + plen-=24; /* adjust prefixlen - labellength */ if (32 < plen) return -1; memset(&addr, 0, sizeof(addr)); + TCHECK2(pptr[4], (plen + 7) / 8); memcpy(&addr, &pptr[4], (plen + 7) / 8); if (plen % 8) { ((u_char *)&addr)[(plen + 7) / 8 - 1] &= @@ -475,60 +530,107 @@ decode_labeled_prefix4(const u_char *pptr, char *buf, u_int buflen) ((pptr[3]&1)==0) ? "(BOGUS: Bottom of Stack NOT set!)" : "(bottom)" ); return 4 + (plen + 7) / 8; + +trunc: + return -2; } -static char * +/* 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 following string - * xxx.xxx.xxx.xxx:xxxxx - * 21 bytes plus one termination byte */ - static char rd[22]; + /* 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*/ case 0: - 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", + EXTRACT_16BITS(pptr+2), *(pptr+4), *(pptr+5), *(pptr+6), *(pptr+7)); break; /* IP-address:AS fmt*/ + case 1: - 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), "%u:%u (%u.%u.%u.%u:%u)", + EXTRACT_32BITS(pptr+2), EXTRACT_16BITS(pptr+6), + *(pptr+2), *(pptr+3), *(pptr+4), *(pptr+5), EXTRACT_16BITS(pptr+6)); break; default: - sprintf(pos, "unknown RD format"); + snprintf(pos, sizeof(rd) - (pos - rd), "unknown RD format"); break; } - pos+=strlen(pos); + 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: %u, route target %s", + 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] &= @@ -543,15 +645,21 @@ decode_labeled_vpn_prefix4(const u_char *pptr, char *buf, u_int buflen) ((pptr[3]&1)==0) ? "(BOGUS: Bottom of Stack NOT set!)" : "(bottom)" ); return 12 + (plen + 7) / 8; + +trunc: + return -2; } 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); 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), @@ -562,6 +670,9 @@ decode_labeled_vpn_l2(const u_char *pptr, char *buf, u_int buflen) /* 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; @@ -574,6 +685,7 @@ decode_labeled_vpn_l2(const u_char *pptr, char *buf, u_int buflen) tlv_len); ttlv_len=ttlv_len/8+1; /* how many bytes do we need to read ? */ while (ttlv_len>0) { + TCHECK(pptr[0]); strlen+=snprintf(buf+strlen,buflen-strlen, "%02x",*pptr++); ttlv_len--; } @@ -587,20 +699,25 @@ decode_labeled_vpn_l2(const u_char *pptr, char *buf, u_int buflen) tlen-=(tlv_len<<3); /* the tlv-length is expressed in bits so lets shift it tright */ } return plen+2; + +trunc: + return -2; } #ifdef INET6 -static int +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 (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] &= @@ -608,6 +725,9 @@ 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 @@ -616,13 +736,19 @@ 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] &= @@ -636,6 +762,9 @@ decode_labeled_prefix6(const u_char *pptr, char *buf, u_int buflen) ((pptr[3]&1)==0) ? "(BOGUS: Bottom of Stack NOT set!)" : "(bottom)" ); return 4 + (plen + 7) / 8; + +trunc: + return -2; } static int @@ -644,14 +773,19 @@ 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] &= @@ -666,15 +800,85 @@ decode_labeled_vpn_prefix6(const u_char *pptr, char *buf, u_int buflen) ((pptr[3]&1)==0) ? "(BOGUS: Bottom of Stack NOT set!)" : "(bottom)" ); return 12 + (plen + 7) / 8; + +trunc: + return -2; } #endif -static void +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; +} + +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; @@ -683,6 +887,7 @@ bgp_attr_print(const struct bgp_attr *attr, const u_char *pptr, int len) int tlen; const u_char *tptr; char buf[MAXHOSTNAMELEN + 100]; + char tokbuf[TOKBUFSIZE]; tptr = pptr; tlen=len; @@ -691,9 +896,15 @@ bgp_attr_print(const struct bgp_attr *attr, const u_char *pptr, int len) case BGPTYPE_ORIGIN: if (len != 1) printf("invalid len"); - else - printf("%s", tok2str(bgp_origin_values, "Unknown Origin Typecode", tptr[0])); + else { + TCHECK(*tptr); + printf("%s", tok2strbuf(bgp_origin_values, + "Unknown Origin Typecode", + tptr[0], + tokbuf, sizeof(tokbuf))); + } break; + case BGPTYPE_AS_PATH: if (len % 2) { printf("invalid len"); @@ -703,35 +914,40 @@ bgp_attr_print(const struct bgp_attr *attr, const u_char *pptr, int len) printf("empty"); break; } + 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; + TCHECK(tptr[0]); + printf("%s", tok2strbuf(bgp_as_path_segment_open_values, + "?", tptr[0], + tokbuf, sizeof(tokbuf))); + for (i = 0; i < tptr[1] * 2; i += 2) { + TCHECK2(tptr[2 + i], 2); + printf("%u ", EXTRACT_16BITS(&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] * 2; } break; case BGPTYPE_NEXT_HOP: if (len != 4) printf("invalid len"); - else + 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 + else { + TCHECK2(tptr[0], 4); printf("%u", EXTRACT_32BITS(tptr)); + } break; case BGPTYPE_ATOMIC_AGGREGATE: if (len != 0) @@ -742,6 +958,7 @@ bgp_attr_print(const struct bgp_attr *attr, const u_char *pptr, int len) printf("invalid len"); break; } + TCHECK2(tptr[0], 6); printf(" AS #%u, origin %s", EXTRACT_16BITS(tptr), getname(tptr + 2)); break; @@ -752,6 +969,7 @@ bgp_attr_print(const struct bgp_attr *attr, const u_char *pptr, int len) } while (tlen>0) { u_int32_t comm; + TCHECK2(tptr[0], 4); comm = EXTRACT_32BITS(tptr); switch (comm) { case BGP_COMMUNITY_NO_EXPORT: @@ -779,10 +997,16 @@ bgp_attr_print(const struct bgp_attr *attr, const u_char *pptr, int len) printf("invalid len"); break; } + 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(tptr), (tlen>4) ? ", " : ""); @@ -791,328 +1015,472 @@ bgp_attr_print(const struct bgp_attr *attr, const u_char *pptr, int len) } break; case BGPTYPE_MP_REACH_NLRI: + 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(bgp_afi_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 || af==AFNUM_L2VPN) - ; + 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): #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_RT_ROUTING_INFO): + 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); + 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; } tptr +=3; - tlen = tptr[0]; + 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 <= 1) - print_unknown_data(tptr,"\n\t ",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): + 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(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 <= 1) - 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): + case (AFNUM_INET6<<8 | SAFNUM_RT_ROUTING_INFO): + 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 - 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 <= 1) - print_unknown_data(tptr,"\n\t ",tlen); - break; - } - break; - - default: - printf("no AFI %u decoder",af); - if (vflag <= 1) - 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)) { + 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; + } + } } + printf(", nh-length: %u", nhlen); tptr += tlen; + TCHECK(tptr[0]); snpa = tptr[0]; tptr++; if (snpa) { printf("\n\t %u SNPA", snpa); for (/*nothing*/; snpa > 0; snpa--) { + TCHECK(tptr[0]); printf("\n\t %d bytes", tptr[0]); tptr += tptr[0] + 1; } } else { - printf(", no SNPA"); + printf(", 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)); - if (advance >= 0) - printf("\n\t %s", buf); - else - printf("\n\t (illegal prefix length)"); - 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 <= 1) - 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(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; #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; - case SAFNUM_LABUNICAST: - advance = decode_labeled_prefix6(tptr, buf, sizeof(buf)); - printf("\n\t %s", buf); - break; - case SAFNUM_VPNUNICAST: - case SAFNUM_VPNMULTICAST: - case SAFNUM_VPNUNIMULTICAST: - advance = decode_labeled_vpn_prefix6(tptr, buf, sizeof(buf)); - printf("\n\t %s", buf); - break; - default: - printf("\n\t no SAFI %u decoder ",safi); - if (vflag <= 1) - 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(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; + case (AFNUM_INET6<<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; #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 <= 1) - 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 <= 1) - 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(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: + 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(bgp_afi_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 (len == BGP_MP_NLRI_MINSIZE) + printf("\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)); - if (advance >= 0) - printf("\n\t %s", buf); - else - printf("\n\t (illegal prefix length)"); - 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 <= 1) - 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(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(tptr, buf, sizeof(buf)); - printf("\n\t %s", buf); - break; - case SAFNUM_LABUNICAST: - advance = decode_labeled_prefix6(tptr, buf, sizeof(buf)); - printf("\n\t %s", buf); - break; - case SAFNUM_VPNUNICAST: - case SAFNUM_VPNMULTICAST: - case SAFNUM_VPNUNIMULTICAST: - advance = decode_labeled_vpn_prefix6(tptr, buf, sizeof(buf)); - printf("\n\t %s", buf); - break; - default: - printf("\n\t no SAFI %u decoder",safi); - if (vflag <= 1) - 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(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 - - 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 <= 1) - 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 <= 1) - 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(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-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: @@ -1122,13 +1490,18 @@ bgp_attr_print(const struct bgp_attr *attr, const u_char *pptr, int len) } 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]", - tok2str(bgp_extd_comm_subtype_values, "unknown extd community typecode", extd_comm), + 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: @@ -1151,9 +1524,13 @@ bgp_attr_print(const struct bgp_attr *attr, const u_char *pptr, int len) case BGP_EXT_COM_LINKBAND: bw.i = EXTRACT_32BITS(tptr+2); printf(": bandwidth: %.3f Mbps", - extd_comm, bw.f*8/1000000); break; + case BGP_EXT_COM_CISCO_MCAST: + printf(": AS %u, group %s", + EXTRACT_16BITS(tptr+2), + getname(tptr+4)); + break; case BGP_EXT_COM_VPN_ORIGIN: case BGP_EXT_COM_VPN_ORIGIN2: case BGP_EXT_COM_VPN_ORIGIN3: @@ -1166,21 +1543,24 @@ bgp_attr_print(const struct bgp_attr *attr, const u_char *pptr, int len) case BGP_EXT_COM_OSPF_RTYPE2: printf(": area:%s, router-type:%s, metric-type:%s%s", getname(tptr+2), - tok2str(bgp_extd_comm_ospf_rtype_values, - "unknown (0x%02x)", - *(tptr+6)), + 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 ||BGP_OSPF_RTYPE_NSSA )) ? "E1" : ""); break; case BGP_EXT_COM_L2INFO: printf(": %s Control Flags [0x%02x]:MTU %u", - tok2str(bgp_l2vpn_encaps_values, - "unknown encaps", - *(tptr+2)), + tok2strbuf(l2vpn_encaps_values, + "unknown encaps", + *(tptr+2), + tokbuf, sizeof(tokbuf)), *(tptr+3), EXTRACT_16BITS(tptr+4)); break; default: + TCHECK2(*tptr,8); print_unknown_data(tptr,"\n\t ",8); break; } @@ -1189,14 +1569,63 @@ bgp_attr_print(const struct bgp_attr *attr, const u_char *pptr, int len) } break; + case BGPTYPE_ATTR_SET: + TCHECK2(tptr[0], 4); + printf("\n\t Origin AS: %u", 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 */ if (vflag <= 1) print_unknown_data(pptr,"\n\t ",len); break; } - if (vflag > 1 && len) /* omit zero length attributes*/ + 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 @@ -1204,13 +1633,13 @@ 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,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)); @@ -1236,7 +1665,9 @@ bgp_open_print(const u_char *dat, int length) } printf("\n\t Option %s (%u), length: %u", - tok2str(bgp_opt_values,"Unknown", bgpopt.bgpopt_type), + tok2strbuf(bgp_opt_values,"Unknown", + bgpopt.bgpopt_type, + tokbuf, sizeof(tokbuf)), bgpopt.bgpopt_type, bgpopt.bgpopt_len); @@ -1246,15 +1677,21 @@ bgp_open_print(const u_char *dat, int length) cap_type=opt[i+BGP_OPT_SIZE]; cap_len=opt[i+BGP_OPT_SIZE+1]; tcap_len=cap_len; - printf("\n\t %s, length: %u", - tok2str(bgp_capcode_values,"Unknown", cap_type), + 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(bgp_afi_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: @@ -1265,9 +1702,13 @@ bgp_open_print(const u_char *dat, int length) cap_offset=4; while(tcap_len>=4) { printf("\n\t\t AFI %s (%u), SAFI %s (%u), Forwarding state preserved: %s", - tok2str(bgp_afi_values,"Unknown", EXTRACT_16BITS(opt+i+BGP_OPT_SIZE+cap_offset)), + tok2strbuf(bgp_afi_values,"Unknown", + EXTRACT_16BITS(opt+i+BGP_OPT_SIZE+cap_offset), + tokbuf, sizeof(tokbuf)), EXTRACT_16BITS(opt+i+BGP_OPT_SIZE+cap_offset), - tok2str(bgp_safi_values,"Unknown", opt[i+BGP_OPT_SIZE+cap_offset+2]), + 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; @@ -1278,14 +1719,17 @@ bgp_open_print(const u_char *dat, int length) case BGP_CAPCODE_RR_CISCO: 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) + 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: @@ -1306,14 +1750,13 @@ 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 */ @@ -1337,12 +1780,14 @@ bgp_update_print(const u_char *dat, int length) while(i < 2 + len) { wpfx = decode_prefix4(&p[i], buf, sizeof(buf)); - if (wpfx >= 0) { - i += wpfx; - printf("\n\t %s", buf); - } else { + 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 @@ -1351,6 +1796,12 @@ 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; @@ -1363,7 +1814,9 @@ 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); @@ -1377,23 +1830,26 @@ 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)); - if (i >= 0) { - printf("\n\t %s", buf); - p += i; - } else { + if (i == -1) { printf("\n\t (illegal prefix length)"); break; + } else if (i == -2) + goto trunc; + else { + printf("\n\t %s", buf); + p += i; } } } @@ -1406,45 +1862,51 @@ 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); /* some little sanity checking */ if (lengthafi)), /* this stinks but the compiler pads the structure weird */ + tok2strbuf(bgp_afi_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), + tok2strbuf(bgp_safi_values,"Unknown", + bgp_route_refresh_header->safi, + tokbuf2, sizeof(tokbuf2)), bgp_route_refresh_header->safi); - if (vflag > 1) + if (vflag > 1) { + TCHECK2(*pptr, len); print_unknown_data(pptr,"\n\t ", len); + } return; +trunc: + printf("[|BGP]"); } -static void +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), + tok2strbuf(bgp_msg_values, "Unknown", bgp.bgp_type, + tokbuf, sizeof(tokbuf)), bgp.bgp_type, length); @@ -1518,14 +2001,16 @@ bgp_header_print(const u_char *dat, int length) 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 @@ -1540,6 +2025,7 @@ 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) @@ -1552,7 +2038,7 @@ bgp_print(const u_char *dat, int length) p = dat; start = p; - while (p < snapend) { + while (p < ep) { if (!TTEST2(p[0], 1)) break; if (p[0] != 0xff) { @@ -1582,11 +2068,16 @@ bgp_print(const u_char *dat, int length) } if (TTEST2(p[0], hlen)) { - bgp_header_print(p, hlen); + if (!bgp_header_print(p, hlen)) + return; p += hlen; start = p; } else { - printf("\n[|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; } }