X-Git-Url: https://git.tcpdump.org/tcpdump/blobdiff_plain/32e24ead3b2a171e5f5eff50d7231c2514eda9b4..383670e8f3f5b51d1017d8c1a678aa7eaf1f2b4d:/print-bgp.c diff --git a/print-bgp.c b/print-bgp.c index 6f523585..a2095372 100644 --- a/print-bgp.c +++ b/print-bgp.c @@ -114,7 +114,7 @@ struct bgp_route_refresh { #define bgp_attr_lenlen(flags, p) \ (((flags) & 0x10) ? 2U : 1U) #define bgp_attr_len(flags, p) \ - (((flags) & 0x10) ? EXTRACT_BE_U_2(p) : EXTRACT_U_1(p)) + (((flags) & 0x10) ? GET_BE_U_2(p) : GET_U_1(p)) #define BGPTYPE_ORIGIN 1 #define BGPTYPE_AS_PATH 2 @@ -216,12 +216,14 @@ static const struct tok bgp_opt_values[] = { #define BGP_CAPCODE_ORF 3 /* RFC5291 */ #define BGP_CAPCODE_MR 4 /* RFC3107 */ #define BGP_CAPCODE_EXT_NH 5 /* RFC5549 */ +#define BGP_CAPCODE_ML 8 /* RFC8277 */ #define BGP_CAPCODE_RESTART 64 /* RFC4724 */ #define BGP_CAPCODE_AS_NEW 65 /* RFC6793 */ #define BGP_CAPCODE_DYN_CAP 67 /* draft-ietf-idr-dynamic-cap */ #define BGP_CAPCODE_MULTISESS 68 /* draft-ietf-idr-bgp-multisession */ #define BGP_CAPCODE_ADD_PATH 69 /* RFC7911 */ #define BGP_CAPCODE_ENH_RR 70 /* draft-keyur-bgp-enhanced-route-refresh */ +#define BGP_CAPCODE_LLGR 71 /* draft-uttaro-idr-bgp-persistence-05 */ #define BGP_CAPCODE_RR_CISCO 128 static const struct tok bgp_capcode_values[] = { @@ -230,12 +232,14 @@ static const struct tok bgp_capcode_values[] = { { BGP_CAPCODE_ORF, "Cooperative Route Filtering"}, { BGP_CAPCODE_MR, "Multiple Routes to a Destination"}, { BGP_CAPCODE_EXT_NH, "Extended Next Hop Encoding"}, + { BGP_CAPCODE_ML, "Multiple Labels"}, { BGP_CAPCODE_RESTART, "Graceful Restart"}, { BGP_CAPCODE_AS_NEW, "32-Bit AS Number"}, { BGP_CAPCODE_DYN_CAP, "Dynamic Capability"}, { BGP_CAPCODE_MULTISESS, "Multisession BGP"}, { BGP_CAPCODE_ADD_PATH, "Multiple Paths"}, { BGP_CAPCODE_ENH_RR, "Enhanced Route Refresh"}, + { BGP_CAPCODE_LLGR, "Long-lived Graceful Restart"}, { BGP_CAPCODE_RR_CISCO, "Route Refresh (Cisco)"}, { 0, NULL} }; @@ -378,6 +382,8 @@ static const struct tok bgp_aigp_values[] = { #define SAFNUM_VPLS 65 /* RFC6037 */ #define SAFNUM_MDT 66 +/* RFC7432 */ +#define SAFNUM_EVPN 70 /* RFC4364 */ #define SAFNUM_VPNUNICAST 128 /* RFC6513 */ @@ -397,6 +403,7 @@ static const struct tok bgp_safi_values[] = { { SAFNUM_TUNNEL, "Tunnel"}, { SAFNUM_VPLS, "VPLS"}, { SAFNUM_MDT, "MDT"}, + { SAFNUM_EVPN, "EVPN"}, { SAFNUM_VPNUNICAST, "labeled VPN Unicast"}, { SAFNUM_VPNMULTICAST, "labeled VPN Multicast"}, { SAFNUM_VPNUNIMULTICAST, "labeled VPN Unicast+Multicast"}, @@ -426,6 +433,7 @@ static const struct tok bgp_safi_values[] = { #define BGP_EXT_COM_OSPF_RTYPE 0x0306 /* OSPF Route Type,Format Area(4B):RouteType(1B):Options(1B) */ #define BGP_EXT_COM_OSPF_RTYPE2 0x8000 /* duplicate - keep for backwards compatibility */ +#define BGP_EXT_COM_ENCAP 0x030c /* rfc5512 */ #define BGP_EXT_COM_OSPF_RID 0x0107 /* OSPF Router ID,Format RouterID(4B):Unused(2B) */ #define BGP_EXT_COM_OSPF_RID2 0x8001 /* duplicate - keep for backwards compatibility */ @@ -437,7 +445,7 @@ static const struct tok bgp_safi_values[] = { #define BGP_EXT_COM_L2VPN_RT_0 0x000a /* L2VPN Identifier,Format AS(2bytes):AN(4bytes) */ #define BGP_EXT_COM_L2VPN_RT_1 0xF10a /* L2VPN Identifier,Format IP address:AN(2bytes) */ -/* http://www.cisco.com/en/US/tech/tk436/tk428/technologies_tech_note09186a00801eb09a.shtml */ +/* https://www.cisco.com/en/US/tech/tk436/tk428/technologies_tech_note09186a00801eb09a.shtml */ #define BGP_EXT_COM_EIGRP_GEN 0x8800 #define BGP_EXT_COM_EIGRP_METRIC_AS_DELAY 0x8801 #define BGP_EXT_COM_EIGRP_METRIC_REL_NH_BW 0x8802 @@ -465,6 +473,7 @@ static const struct tok bgp_extd_comm_subtype_values[] = { { BGP_EXT_COM_VPN_ORIGIN4, "ospf-domain"}, { BGP_EXT_COM_OSPF_RTYPE, "ospf-route-type"}, { BGP_EXT_COM_OSPF_RTYPE2, "ospf-route-type"}, + { BGP_EXT_COM_ENCAP, "encapsulation"}, { BGP_EXT_COM_OSPF_RID, "ospf-router-id"}, { BGP_EXT_COM_OSPF_RID2, "ospf-router-id"}, { BGP_EXT_COM_L2INFO, "layer2-info"}, @@ -481,6 +490,46 @@ static const struct tok bgp_extd_comm_subtype_values[] = { { 0, NULL}, }; +/* RFC RFC5512 BGP Tunnel Encapsulation Attribute Tunnel Types */ +#define BGP_ENCAP_TUNNEL_L2TPV3_IP 1 +#define BGP_ENCAP_TUNNEL_GRE 2 +#define BGP_ENCAP_TUNNEL_TRANSMIT 3 +#define BGP_ENCAP_TUNNEL_IPSEC 4 +#define BGP_ENCAP_TUNNEL_IP_IPSEC 5 +#define BGP_ENCAP_TUNNEL_MPLS_IP 6 +#define BGP_ENCAP_TUNNEL_IP_IP 7 +#define BGP_ENCAP_TUNNEL_VXLAN 8 +#define BGP_ENCAP_TUNNEL_NVGRE 9 +#define BGP_ENCAP_TUNNEL_MPLS 10 +#define BGP_ENCAP_TUNNEL_MPLS_GRE 11 +#define BGP_ENCAP_TUNNEL_VXLAN_GPE 12 +#define BGP_ENCAP_TUNNEL_MPLS_UDP 13 +#define BGP_ENCAP_TUNNEL_IPV6 14 +#define BGP_ENCAP_TUNNEL_SR_TE 15 +#define BGP_ENCAP_TUNNEL_BARE 16 +#define BGP_ENCAP_TUNNEL_SR 17 + +static const struct tok bgp_extd_comm_encap_tunnel_values[] = { + { BGP_ENCAP_TUNNEL_L2TPV3_IP, "L2TPv3 over IP"}, + { BGP_ENCAP_TUNNEL_GRE, "GRE"}, + { BGP_ENCAP_TUNNEL_TRANSMIT, "Transmit Tunnel"}, + { BGP_ENCAP_TUNNEL_IPSEC, "IPsec"}, + { BGP_ENCAP_TUNNEL_IP_IPSEC, "IP in IP with IPsec"}, + { BGP_ENCAP_TUNNEL_MPLS_IP, "MPLS in IP with IPsec"}, + { BGP_ENCAP_TUNNEL_IP_IP, "IP in IP"}, + { BGP_ENCAP_TUNNEL_VXLAN, "VXLAN"}, + { BGP_ENCAP_TUNNEL_NVGRE, "NVGRE"}, + { BGP_ENCAP_TUNNEL_MPLS, "MPLS"}, + { BGP_ENCAP_TUNNEL_MPLS_GRE, "MPLS in GRE"}, + { BGP_ENCAP_TUNNEL_VXLAN_GPE, "VXLAN GPE"}, + { BGP_ENCAP_TUNNEL_MPLS_UDP, "MPLS in UDP"}, + { BGP_ENCAP_TUNNEL_IPV6, "IPv6"}, + { BGP_ENCAP_TUNNEL_SR_TE, "SR TE"}, + { BGP_ENCAP_TUNNEL_BARE, "Bare"}, + { BGP_ENCAP_TUNNEL_SR, "SR"}, + { 0, NULL}, +}; + /* OSPF codes for BGP_EXT_COM_OSPF_RTYPE draft-rosen-vpns-ospf-bgp-mpls */ #define BGP_OSPF_RTYPE_RTR 1 /* OSPF Router LSA */ #define BGP_OSPF_RTYPE_NET 2 /* OSPF Network LSA */ @@ -508,7 +557,8 @@ static const struct tok bgp_add_path_recvsend[] = { { 0, NULL }, }; -static char astostr[20]; +/* allocate space for the largest possible string */ +static char astostr[sizeof("xxxxx.xxxxx")]; /* * as_printf @@ -524,9 +574,9 @@ as_printf(netdissect_options *ndo, char *str, size_t size, u_int asnum) { if (!ndo->ndo_bflag || asnum <= 0xFFFF) { - nd_snprintf(str, size, "%u", asnum); + snprintf(str, size, "%u", asnum); } else { - nd_snprintf(str, size, "%u.%u", asnum >> 16, asnum & 0xFFFF); + snprintf(str, size, "%u.%u", asnum >> 16, asnum & 0xFFFF); } return str; } @@ -535,47 +585,43 @@ as_printf(netdissect_options *ndo, int decode_prefix4(netdissect_options *ndo, - const u_char *pptr, u_int itemlen, char *buf, u_int buflen) + const u_char *pptr, u_int itemlen, char *buf, size_t buflen) { - struct in_addr addr; + nd_ipv4 addr; u_int plen, plenbytes; - ND_TCHECK_1(pptr); ITEMCHECK(1); - plen = EXTRACT_U_1(pptr); + plen = GET_U_1(pptr); if (32 < plen) return -1; itemlen -= 1; memset(&addr, 0, sizeof(addr)); plenbytes = (plen + 7) / 8; - ND_TCHECK_LEN(pptr + 1, plenbytes); ITEMCHECK(plenbytes); - memcpy(&addr, pptr + 1, plenbytes); + GET_CPY_BYTES(&addr, pptr + 1, plenbytes); if (plen % 8) { ((u_char *)&addr)[plenbytes - 1] &= ((0xff00 >> (plen % 8)) & 0xff); } - nd_snprintf(buf, buflen, "%s/%u", ipaddr_string(ndo, (const u_char *)&addr), plen); + snprintf(buf, buflen, "%s/%u", ipaddr_string(ndo, (const u_char *)&addr), plen); return 1 + plenbytes; -trunc: - return -2; - badtlv: - return -3; + return -2; } static int decode_labeled_prefix4(netdissect_options *ndo, - const u_char *pptr, u_int itemlen, char *buf, u_int buflen) + const u_char *pptr, u_int itemlen, char *buf, + size_t buflen) { - struct in_addr addr; + nd_ipv4 addr; u_int plen, plenbytes; /* prefix length and label = 4 bytes */ ND_TCHECK_4(pptr); ITEMCHECK(4); - plen = EXTRACT_U_1(pptr); /* get prefix length */ + plen = GET_U_1(pptr); /* get prefix length */ /* this is one of the weirdnesses of rfc3107 the label length (actually the label + COS bits) @@ -596,18 +642,17 @@ decode_labeled_prefix4(netdissect_options *ndo, memset(&addr, 0, sizeof(addr)); plenbytes = (plen + 7) / 8; - ND_TCHECK_LEN(pptr + 4, plenbytes); ITEMCHECK(plenbytes); - memcpy(&addr, pptr + 4, plenbytes); + GET_CPY_BYTES(&addr, pptr + 4, plenbytes); if (plen % 8) { ((u_char *)&addr)[plenbytes - 1] &= ((0xff00 >> (plen % 8)) & 0xff); } /* the label may get offsetted by 4 bits so lets shift it right */ - nd_snprintf(buf, buflen, "%s/%u, label:%u %s", + snprintf(buf, buflen, "%s/%u, label:%u %s", ipaddr_string(ndo, (const u_char *)&addr), plen, - EXTRACT_BE_U_3(pptr + 1)>>4, - ((EXTRACT_U_1(pptr + 3) & 1) == 0) ? "(BOGUS: Bottom of Stack NOT set!)" : "(bottom)" ); + GET_BE_U_3(pptr + 1)>>4, + ((GET_U_1(pptr + 3) & 1) == 0) ? "(BOGUS: Bottom of Stack NOT set!)" : "(bottom)" ); return 4 + plenbytes; @@ -621,7 +666,7 @@ badtlv: /* * bgp_vpn_ip_print * - * print an ipv4 or ipv6 address into a buffer dependend on address length. + * print an ipv4 or ipv6 address into a buffer dependent on address length. */ static char * bgp_vpn_ip_print(netdissect_options *ndo, @@ -634,20 +679,17 @@ bgp_vpn_ip_print(netdissect_options *ndo, switch(addr_length) { case (sizeof(nd_ipv4) << 3): /* 32 */ - ND_TCHECK_LEN(pptr, sizeof(nd_ipv4)); - nd_snprintf(pos, sizeof(addr), "%s", ipaddr_string(ndo, pptr)); + snprintf(pos, sizeof(addr), "%s", GET_IPADDR_STRING(pptr)); break; case (sizeof(nd_ipv6) << 3): /* 128 */ - ND_TCHECK_LEN(pptr, sizeof(nd_ipv6)); - nd_snprintf(pos, sizeof(addr), "%s", ip6addr_string(ndo, pptr)); + snprintf(pos, sizeof(addr), "%s", GET_IP6ADDR_STRING(pptr)); break; default: - nd_snprintf(pos, sizeof(addr), "bogus address length %u", addr_length); + snprintf(pos, sizeof(addr), "bogus address length %u", addr_length); break; } pos += strlen(pos); -trunc: *(pos) = '\0'; return (addr); } @@ -672,7 +714,7 @@ trunc: */ static u_int bgp_vpn_sg_print(netdissect_options *ndo, - const u_char *pptr, char *buf, u_int buflen) + const u_char *pptr, char *buf, size_t buflen) { uint8_t addr_length; u_int total_length, offset; @@ -680,31 +722,29 @@ bgp_vpn_sg_print(netdissect_options *ndo, total_length = 0; /* Source address length, encoded in bits */ - ND_TCHECK_1(pptr); - addr_length = EXTRACT_U_1(pptr); + addr_length = GET_U_1(pptr); pptr++; /* Source address */ ND_TCHECK_LEN(pptr, (addr_length >> 3)); total_length += (addr_length >> 3) + 1; - offset = strlen(buf); + offset = (u_int)strlen(buf); if (addr_length) { - nd_snprintf(buf + offset, buflen - offset, ", Source %s", + snprintf(buf + offset, buflen - offset, ", Source %s", bgp_vpn_ip_print(ndo, pptr, addr_length)); pptr += (addr_length >> 3); } /* Group address length, encoded in bits */ - ND_TCHECK_1(pptr); - addr_length = EXTRACT_U_1(pptr); + addr_length = GET_U_1(pptr); pptr++; /* Group address */ ND_TCHECK_LEN(pptr, (addr_length >> 3)); total_length += (addr_length >> 3) + 1; - offset = strlen(buf); + offset = (u_int)strlen(buf); if (addr_length) { - nd_snprintf(buf + offset, buflen - offset, ", Group %s", + snprintf(buf + offset, buflen - offset, ", Group %s", bgp_vpn_ip_print(ndo, pptr, addr_length)); pptr += (addr_length >> 3); } @@ -719,39 +759,39 @@ bgp_vpn_rd_print(netdissect_options *ndo, const u_char *pptr) { /* allocate space for the largest possible string */ - static char rd[sizeof("xxxxxxxxxx:xxxxx (xxx.xxx.xxx.xxx:xxxxx)")]; + static char rd[sizeof("xxxxx.xxxxx:xxxxx (xxx.xxx.xxx.xxx:xxxxx)")]; char *pos = rd; /* ok lets load the RD format */ - switch (EXTRACT_BE_U_2(pptr)) { + switch (GET_BE_U_2(pptr)) { case 0: /* 2-byte-AS:number fmt */ - nd_snprintf(pos, sizeof(rd) - (pos - rd), "%u:%u (= %u.%u.%u.%u)", - EXTRACT_BE_U_2(pptr + 2), - EXTRACT_BE_U_4(pptr + 4), - EXTRACT_U_1(pptr + 4), EXTRACT_U_1(pptr + 5), - EXTRACT_U_1(pptr + 6), EXTRACT_U_1(pptr + 7)); + snprintf(pos, sizeof(rd) - (pos - rd), "%u:%u (= %u.%u.%u.%u)", + GET_BE_U_2(pptr + 2), + GET_BE_U_4(pptr + 4), + GET_U_1(pptr + 4), GET_U_1(pptr + 5), + GET_U_1(pptr + 6), GET_U_1(pptr + 7)); break; case 1: /* IP-address:AS fmt */ - nd_snprintf(pos, sizeof(rd) - (pos - rd), "%u.%u.%u.%u:%u", - EXTRACT_U_1(pptr + 2), EXTRACT_U_1(pptr + 3), - EXTRACT_U_1(pptr + 4), EXTRACT_U_1(pptr + 5), - EXTRACT_BE_U_2(pptr + 6)); + snprintf(pos, sizeof(rd) - (pos - rd), "%u.%u.%u.%u:%u", + GET_U_1(pptr + 2), GET_U_1(pptr + 3), + GET_U_1(pptr + 4), GET_U_1(pptr + 5), + GET_BE_U_2(pptr + 6)); break; case 2: /* 4-byte-AS:number fmt */ - nd_snprintf(pos, sizeof(rd) - (pos - rd), "%s:%u (%u.%u.%u.%u:%u)", - as_printf(ndo, astostr, sizeof(astostr), EXTRACT_BE_U_4(pptr + 2)), - EXTRACT_BE_U_2(pptr + 6), EXTRACT_U_1(pptr + 2), - EXTRACT_U_1(pptr + 3), EXTRACT_U_1(pptr + 4), - EXTRACT_U_1(pptr + 5), EXTRACT_BE_U_2(pptr + 6)); + snprintf(pos, sizeof(rd) - (pos - rd), "%s:%u (%u.%u.%u.%u:%u)", + as_printf(ndo, astostr, sizeof(astostr), GET_BE_U_4(pptr + 2)), + GET_BE_U_2(pptr + 6), GET_U_1(pptr + 2), + GET_U_1(pptr + 3), GET_U_1(pptr + 4), + GET_U_1(pptr + 5), GET_BE_U_2(pptr + 6)); break; default: - nd_snprintf(pos, sizeof(rd) - (pos - rd), "unknown RD format"); + snprintf(pos, sizeof(rd) - (pos - rd), "unknown RD format"); break; } pos += strlen(pos); @@ -771,15 +811,15 @@ bgp_extended_community_print(netdissect_options *ndo, uint32_t i; } bw; - switch (EXTRACT_BE_U_2(pptr)) { + switch (GET_BE_U_2(pptr)) { case BGP_EXT_COM_RT_0: case BGP_EXT_COM_RO_0: case BGP_EXT_COM_L2VPN_RT_0: ND_PRINT("%u:%u (= %s)", - EXTRACT_BE_U_2(pptr + 2), - EXTRACT_BE_U_4(pptr + 4), - ipaddr_string(ndo, pptr+4)); + GET_BE_U_2(pptr + 2), + GET_BE_U_4(pptr + 4), + GET_IPADDR_STRING(pptr+4)); break; case BGP_EXT_COM_RT_1: @@ -787,19 +827,19 @@ bgp_extended_community_print(netdissect_options *ndo, case BGP_EXT_COM_L2VPN_RT_1: case BGP_EXT_COM_VRF_RT_IMP: ND_PRINT("%s:%u", - ipaddr_string(ndo, pptr+2), - EXTRACT_BE_U_2(pptr + 6)); + GET_IPADDR_STRING(pptr+2), + GET_BE_U_2(pptr + 6)); break; case BGP_EXT_COM_RT_2: case BGP_EXT_COM_RO_2: ND_PRINT("%s:%u", as_printf(ndo, astostr, sizeof(astostr), - EXTRACT_BE_U_4(pptr + 2)), EXTRACT_BE_U_2(pptr + 6)); + GET_BE_U_4(pptr + 2)), GET_BE_U_2(pptr + 6)); break; case BGP_EXT_COM_LINKBAND: - bw.i = EXTRACT_BE_U_4(pptr + 2); + bw.i = GET_BE_U_4(pptr + 2); ND_PRINT("bandwidth: %.3f Mbps", bw.f*8/1000000); break; @@ -810,43 +850,135 @@ bgp_extended_community_print(netdissect_options *ndo, case BGP_EXT_COM_VPN_ORIGIN4: case BGP_EXT_COM_OSPF_RID: case BGP_EXT_COM_OSPF_RID2: - ND_PRINT("%s", ipaddr_string(ndo, pptr+2)); + ND_PRINT("%s", GET_IPADDR_STRING(pptr+2)); break; case BGP_EXT_COM_OSPF_RTYPE: case BGP_EXT_COM_OSPF_RTYPE2: ND_PRINT("area:%s, router-type:%s, metric-type:%s%s", - ipaddr_string(ndo, pptr+2), + GET_IPADDR_STRING(pptr+2), tok2str(bgp_extd_comm_ospf_rtype_values, "unknown (0x%02x)", - EXTRACT_U_1((pptr + 6))), - (EXTRACT_U_1(pptr + 7) & BGP_OSPF_RTYPE_METRIC_TYPE) ? "E2" : "", - ((EXTRACT_U_1(pptr + 6) == BGP_OSPF_RTYPE_EXT) || (EXTRACT_U_1(pptr + 6) == BGP_OSPF_RTYPE_NSSA)) ? "E1" : ""); + GET_U_1((pptr + 6))), + (GET_U_1(pptr + 7) & BGP_OSPF_RTYPE_METRIC_TYPE) ? "E2" : "", + ((GET_U_1(pptr + 6) == BGP_OSPF_RTYPE_EXT) || (GET_U_1(pptr + 6) == BGP_OSPF_RTYPE_NSSA)) ? "E1" : ""); break; case BGP_EXT_COM_L2INFO: ND_PRINT("%s Control Flags [0x%02x]:MTU %u", tok2str(l2vpn_encaps_values, "unknown encaps", - EXTRACT_U_1((pptr + 2))), - EXTRACT_U_1((pptr + 3)), - EXTRACT_BE_U_2(pptr + 4)); + GET_U_1((pptr + 2))), + GET_U_1((pptr + 3)), + GET_BE_U_2(pptr + 4)); break; case BGP_EXT_COM_SOURCE_AS: - ND_PRINT("AS %u", EXTRACT_BE_U_2(pptr + 2)); + ND_PRINT("AS %u", GET_BE_U_2(pptr + 2)); + break; + + case BGP_EXT_COM_ENCAP: + ND_PRINT("Tunnel type: %s", tok2str(bgp_extd_comm_encap_tunnel_values, + "unknown encaps", + GET_BE_U_2(pptr + 6))); break; default: ND_PRINT("%02x%02x%02x%02x%02x%02x", - EXTRACT_U_1(pptr + 2), - EXTRACT_U_1(pptr + 3), - EXTRACT_U_1(pptr + 4), - EXTRACT_U_1(pptr + 5), - EXTRACT_U_1(pptr + 6), - EXTRACT_U_1(pptr + 7)); + GET_U_1(pptr + 2), + GET_U_1(pptr + 3), + GET_U_1(pptr + 4), + GET_U_1(pptr + 5), + GET_U_1(pptr + 6), + GET_U_1(pptr + 7)); + break; + } +} + +/* + * RFC4684 (Section 4)/RFC2858 (Section 4). + * RTC membership prefix is structured as follows + * [prefix-len] [origin-as] [route-target] + * The route-target is encoded as RT ext-comms. + * Prefix-len may be 0, 32..96 + * + * Note that pptr is not packet data - it is + * a buffer owned by our caller - therefore GET_* + * macros can not be used. + */ +static char * +bgp_rt_prefix_print(netdissect_options *ndo, + const u_char *pptr, + u_int plen) +{ + /* allocate space for the largest possible string */ + char rtc_prefix_in_hex[20] = ""; + u_int rtc_prefix_in_hex_len = 0; + static char output[61]; /* max response string */ + uint16_t ec_type = 0; + u_int octet_count; + u_int i; + + if (plen == 0) { + snprintf(output, sizeof(output), "route-target: 0:0/0"); + return (output); + } + + /* hex representation of the prefix */ + octet_count = (plen+7)/8; + for (i=0; i> (plen % 8)) & 0xff); + } + ND_PRINT("\n\t origin AS: %s, %s", + asbuf, + bgp_rt_prefix_print(ndo, (u_char *)&route_target, plen)); -trunc: - return -2; + return 5 + num_octets; } static int decode_labeled_vpn_prefix4(netdissect_options *ndo, - const u_char *pptr, char *buf, u_int buflen) + const u_char *pptr, char *buf, size_t buflen) { - struct in_addr addr; + nd_ipv4 addr; u_int plen; - ND_TCHECK_1(pptr); - plen = EXTRACT_U_1(pptr); /* get prefix length */ + plen = GET_U_1(pptr); /* get prefix length */ if ((24+64) > plen) return -1; @@ -918,24 +1056,20 @@ decode_labeled_vpn_prefix4(netdissect_options *ndo, return -1; memset(&addr, 0, sizeof(addr)); - ND_TCHECK_LEN(pptr + 12, (plen + 7) / 8); - memcpy(&addr, pptr + 12, (plen + 7) / 8); + GET_CPY_BYTES(&addr, pptr + 12, (plen + 7) / 8); if (plen % 8) { ((u_char *)&addr)[(plen + 7) / 8 - 1] &= ((0xff00 >> (plen % 8)) & 0xff); } /* the label may get offsetted by 4 bits so lets shift it right */ - nd_snprintf(buf, buflen, "RD: %s, %s/%u, label:%u %s", + snprintf(buf, buflen, "RD: %s, %s/%u, label:%u %s", bgp_vpn_rd_print(ndo, pptr+4), ipaddr_string(ndo, (const u_char *)&addr), plen, - EXTRACT_BE_U_3(pptr + 1)>>4, - ((EXTRACT_U_1(pptr + 3) & 1) == 0) ? "(BOGUS: Bottom of Stack NOT set!)" : "(bottom)" ); + GET_BE_U_3(pptr + 1)>>4, + ((GET_U_1(pptr + 3) & 1) == 0) ? "(BOGUS: Bottom of Stack NOT set!)" : "(bottom)" ); return 12 + (plen + 7) / 8; - -trunc: - return -2; } /* @@ -952,15 +1086,13 @@ trunc: static int decode_mdt_vpn_nlri(netdissect_options *ndo, - const u_char *pptr, char *buf, u_int buflen) + const u_char *pptr, char *buf, size_t buflen) { const u_char *rd; const u_char *vpn_ip; - ND_TCHECK_1(pptr); - /* if the NLRI is not predefined length, quit.*/ - if (EXTRACT_U_1(pptr) != MDT_VPN_NLRI_LEN * 8) + if (GET_U_1(pptr) != MDT_VPN_NLRI_LEN * 8) return -1; pptr++; @@ -970,15 +1102,12 @@ decode_mdt_vpn_nlri(netdissect_options *ndo, pptr += 8; /* IPv4 address */ - ND_TCHECK_LEN(pptr, sizeof(nd_ipv4)); vpn_ip = pptr; pptr += sizeof(nd_ipv4); /* MDT Group Address */ - ND_TCHECK_LEN(pptr, sizeof(nd_ipv4)); - - nd_snprintf(buf, buflen, "RD: %s, VPN IP Address: %s, MC Group Address: %s", - bgp_vpn_rd_print(ndo, rd), ipaddr_string(ndo, vpn_ip), ipaddr_string(ndo, pptr)); + snprintf(buf, buflen, "RD: %s, VPN IP Address: %s, MC Group Address: %s", + bgp_vpn_rd_print(ndo, rd), GET_IPADDR_STRING(vpn_ip), GET_IPADDR_STRING(pptr)); return MDT_VPN_NLRI_LEN + 1; @@ -1009,17 +1138,16 @@ static int decode_multicast_vpn(netdissect_options *ndo, const u_char *pptr, char *buf, size_t buflen) { - uint8_t route_type, route_length, addr_length; - u_int sg_length; + uint8_t route_type, route_length; + u_int addr_length, sg_length; u_int offset; - ND_TCHECK_2(pptr); - route_type = EXTRACT_U_1(pptr); + route_type = GET_U_1(pptr); pptr++; - route_length = EXTRACT_U_1(pptr); + route_length = GET_U_1(pptr); pptr++; - nd_snprintf(buf, buflen, "Route-Type: %s (%u), length: %u", + snprintf(buf, buflen, "Route-Type: %s (%u), length: %u", tok2str(bgp_multicast_vpn_route_type_values, "Unknown", route_type), route_type, route_length); @@ -1027,25 +1155,25 @@ decode_multicast_vpn(netdissect_options *ndo, switch(route_type) { case BGP_MULTICAST_VPN_ROUTE_TYPE_INTRA_AS_I_PMSI: ND_TCHECK_LEN(pptr, BGP_VPN_RD_LEN); - offset = strlen(buf); - nd_snprintf(buf + offset, buflen - offset, ", RD: %s, Originator %s", + offset = (u_int)strlen(buf); + snprintf(buf + offset, buflen - offset, ", RD: %s, Originator %s", bgp_vpn_rd_print(ndo, pptr), bgp_vpn_ip_print(ndo, pptr + BGP_VPN_RD_LEN, (route_length - BGP_VPN_RD_LEN) << 3)); break; case BGP_MULTICAST_VPN_ROUTE_TYPE_INTER_AS_I_PMSI: ND_TCHECK_LEN(pptr, BGP_VPN_RD_LEN + 4); - offset = strlen(buf); - nd_snprintf(buf + offset, buflen - offset, ", RD: %s, Source-AS %s", + offset = (u_int)strlen(buf); + snprintf(buf + offset, buflen - offset, ", RD: %s, Source-AS %s", bgp_vpn_rd_print(ndo, pptr), as_printf(ndo, astostr, sizeof(astostr), - EXTRACT_BE_U_4(pptr + BGP_VPN_RD_LEN))); + GET_BE_U_4(pptr + BGP_VPN_RD_LEN))); break; case BGP_MULTICAST_VPN_ROUTE_TYPE_S_PMSI: ND_TCHECK_LEN(pptr, BGP_VPN_RD_LEN); - offset = strlen(buf); - nd_snprintf(buf + offset, buflen - offset, ", RD: %s", + offset = (u_int)strlen(buf); + snprintf(buf + offset, buflen - offset, ", RD: %s", bgp_vpn_rd_print(ndo, pptr)); pptr += BGP_VPN_RD_LEN; @@ -1053,15 +1181,15 @@ decode_multicast_vpn(netdissect_options *ndo, addr_length = route_length - sg_length; ND_TCHECK_LEN(pptr, addr_length); - offset = strlen(buf); - nd_snprintf(buf + offset, buflen - offset, ", Originator %s", + offset = (u_int)strlen(buf); + snprintf(buf + offset, buflen - offset, ", Originator %s", bgp_vpn_ip_print(ndo, pptr, addr_length << 3)); break; case BGP_MULTICAST_VPN_ROUTE_TYPE_SOURCE_ACTIVE: ND_TCHECK_LEN(pptr, BGP_VPN_RD_LEN); - offset = strlen(buf); - nd_snprintf(buf + offset, buflen - offset, ", RD: %s", + offset = (u_int)strlen(buf); + snprintf(buf + offset, buflen - offset, ", RD: %s", bgp_vpn_rd_print(ndo, pptr)); pptr += BGP_VPN_RD_LEN; @@ -1071,11 +1199,11 @@ decode_multicast_vpn(netdissect_options *ndo, case BGP_MULTICAST_VPN_ROUTE_TYPE_SHARED_TREE_JOIN: /* fall through */ case BGP_MULTICAST_VPN_ROUTE_TYPE_SOURCE_TREE_JOIN: ND_TCHECK_LEN(pptr, BGP_VPN_RD_LEN + 4); - offset = strlen(buf); - nd_snprintf(buf + offset, buflen - offset, ", RD: %s, Source-AS %s", + offset = (u_int)strlen(buf); + snprintf(buf + offset, buflen - offset, ", RD: %s, Source-AS %s", bgp_vpn_rd_print(ndo, pptr), as_printf(ndo, astostr, sizeof(astostr), - EXTRACT_BE_U_4(pptr + BGP_VPN_RD_LEN))); + GET_BE_U_4(pptr + BGP_VPN_RD_LEN))); pptr += BGP_VPN_RD_LEN + 4; bgp_vpn_sg_print(ndo, pptr, buf, buflen); @@ -1117,13 +1245,12 @@ trunc: static int decode_labeled_vpn_l2(netdissect_options *ndo, - const u_char *pptr, char *buf, u_int buflen) + const u_char *pptr, char *buf, size_t buflen) { u_int plen, tlen, tlv_type, tlv_len, ttlv_len; int stringlen; - ND_TCHECK_2(pptr); - plen = EXTRACT_BE_U_2(pptr); + plen = GET_BE_U_2(pptr); tlen = plen; pptr += 2; /* Old and new L2VPN NLRI share AFI/SAFI @@ -1134,9 +1261,9 @@ decode_labeled_vpn_l2(netdissect_options *ndo, /* assume AD-only with RD, BGPNH */ ND_TCHECK_LEN(pptr, 12); buf[0] = '\0'; - stringlen = nd_snprintf(buf, buflen, "RD: %s, BGPNH: %s", + stringlen = snprintf(buf, buflen, "RD: %s, BGPNH: %s", bgp_vpn_rd_print(ndo, pptr), - ipaddr_string(ndo, pptr+8)); + GET_IPADDR_STRING(pptr+8)); UPDATE_BUF_BUFLEN(buf, buflen, stringlen); pptr += 12; tlen -= 12; @@ -1147,11 +1274,11 @@ decode_labeled_vpn_l2(netdissect_options *ndo, ND_TCHECK_LEN(pptr, 15); buf[0] = '\0'; - stringlen = nd_snprintf(buf, buflen, "RD: %s, CE-ID: %u, Label-Block Offset: %u, Label Base %u", + stringlen = snprintf(buf, buflen, "RD: %s, CE-ID: %u, Label-Block Offset: %u, Label Base %u", bgp_vpn_rd_print(ndo, pptr), - EXTRACT_BE_U_2(pptr + 8), - EXTRACT_BE_U_2(pptr + 10), - EXTRACT_BE_U_3(pptr + 12)>>4); /* the label is offsetted by 4 bits so lets shift it right */ + GET_BE_U_2(pptr + 8), + GET_BE_U_2(pptr + 10), + GET_BE_U_3(pptr + 12)>>4); /* the label is offsetted by 4 bits so lets shift it right */ UPDATE_BUF_BUFLEN(buf, buflen, stringlen); pptr += 15; tlen -= 15; @@ -1160,22 +1287,21 @@ decode_labeled_vpn_l2(netdissect_options *ndo, while (tlen != 0) { if (tlen < 3) { if (buflen != 0) { - stringlen=nd_snprintf(buf,buflen, "\n\t\tran past the end"); + stringlen=snprintf(buf,buflen, "\n\t\tran past the end"); UPDATE_BUF_BUFLEN(buf, buflen, stringlen); } return plen + 2; } - ND_TCHECK_3(pptr); - tlv_type = EXTRACT_U_1(pptr); + tlv_type = GET_U_1(pptr); pptr++; - tlv_len = EXTRACT_BE_U_2(pptr); /* length, in *bits* */ + tlv_len = GET_BE_U_2(pptr); /* length, in *bits* */ ttlv_len = (tlv_len + 7)/8; /* length, in *bytes* */ pptr += 2; switch(tlv_type) { case 1: if (buflen != 0) { - stringlen=nd_snprintf(buf,buflen, "\n\t\tcircuit status vector (%u) length: %u: 0x", + stringlen=snprintf(buf,buflen, "\n\t\tcircuit status vector (%u) length: %u: 0x", tlv_type, tlv_len); UPDATE_BUF_BUFLEN(buf, buflen, stringlen); @@ -1183,15 +1309,15 @@ decode_labeled_vpn_l2(netdissect_options *ndo, while (ttlv_len != 0) { if (tlen < 1) { if (buflen != 0) { - stringlen=nd_snprintf(buf,buflen, " (ran past the end)"); + stringlen=snprintf(buf,buflen, " (ran past the end)"); UPDATE_BUF_BUFLEN(buf, buflen, stringlen); } return plen + 2; } ND_TCHECK_1(pptr); if (buflen != 0) { - stringlen=nd_snprintf(buf,buflen, "%02x", - EXTRACT_U_1(pptr)); + stringlen=snprintf(buf,buflen, "%02x", + GET_U_1(pptr)); pptr++; UPDATE_BUF_BUFLEN(buf, buflen, stringlen); } @@ -1201,14 +1327,14 @@ decode_labeled_vpn_l2(netdissect_options *ndo, break; default: if (buflen != 0) { - stringlen=nd_snprintf(buf,buflen, "\n\t\tunknown TLV #%u, length: %u", + stringlen=snprintf(buf,buflen, "\n\t\tunknown TLV #%u, length: %u", tlv_type, tlv_len); UPDATE_BUF_BUFLEN(buf, buflen, stringlen); } if (tlen < ttlv_len) { if (buflen != 0) { - stringlen=nd_snprintf(buf,buflen, " (ran past the end)"); + stringlen=snprintf(buf,buflen, " (ran past the end)"); UPDATE_BUF_BUFLEN(buf, buflen, stringlen); } return plen + 2; @@ -1230,48 +1356,43 @@ trunc: int decode_prefix6(netdissect_options *ndo, - const u_char *pd, u_int itemlen, char *buf, u_int buflen) + const u_char *pd, u_int itemlen, char *buf, size_t buflen) { - struct in6_addr addr; + nd_ipv6 addr; u_int plen, plenbytes; - ND_TCHECK_1(pd); ITEMCHECK(1); - plen = EXTRACT_U_1(pd); + plen = GET_U_1(pd); if (128 < plen) return -1; itemlen -= 1; memset(&addr, 0, sizeof(addr)); plenbytes = (plen + 7) / 8; - ND_TCHECK_LEN(pd + 1, plenbytes); ITEMCHECK(plenbytes); - memcpy(&addr, pd + 1, plenbytes); + GET_CPY_BYTES(&addr, pd + 1, plenbytes); if (plen % 8) { - addr.s6_addr[plenbytes - 1] &= + addr[plenbytes - 1] &= ((0xff00 >> (plen % 8)) & 0xff); } - nd_snprintf(buf, buflen, "%s/%u", ip6addr_string(ndo, (const u_char *)&addr), plen); + snprintf(buf, buflen, "%s/%u", ip6addr_string(ndo, (const u_char *)&addr), plen); return 1 + plenbytes; -trunc: - return -2; - badtlv: - return -3; + return -2; } static int decode_labeled_prefix6(netdissect_options *ndo, - const u_char *pptr, u_int itemlen, char *buf, u_int buflen) + const u_char *pptr, u_int itemlen, char *buf, size_t buflen) { - struct in6_addr addr; + nd_ipv6 addr; u_int plen, plenbytes; /* prefix length and label = 4 bytes */ ND_TCHECK_4(pptr); ITEMCHECK(4); - plen = EXTRACT_U_1(pptr); /* get prefix length */ + plen = GET_U_1(pptr); /* get prefix length */ if (24 > plen) return -1; @@ -1284,18 +1405,17 @@ decode_labeled_prefix6(netdissect_options *ndo, memset(&addr, 0, sizeof(addr)); plenbytes = (plen + 7) / 8; - ND_TCHECK_LEN(pptr + 4, plenbytes); - memcpy(&addr, pptr + 4, plenbytes); + GET_CPY_BYTES(&addr, pptr + 4, plenbytes); if (plen % 8) { - addr.s6_addr[plenbytes - 1] &= + addr[plenbytes - 1] &= ((0xff00 >> (plen % 8)) & 0xff); } /* the label may get offsetted by 4 bits so lets shift it right */ - nd_snprintf(buf, buflen, "%s/%u, label:%u %s", + snprintf(buf, buflen, "%s/%u, label:%u %s", ip6addr_string(ndo, (const u_char *)&addr), plen, - EXTRACT_BE_U_3(pptr + 1)>>4, - ((EXTRACT_U_1(pptr + 3) & 1) == 0) ? "(BOGUS: Bottom of Stack NOT set!)" : "(bottom)" ); + GET_BE_U_3(pptr + 1)>>4, + ((GET_U_1(pptr + 3) & 1) == 0) ? "(BOGUS: Bottom of Stack NOT set!)" : "(bottom)" ); return 4 + plenbytes; @@ -1308,13 +1428,12 @@ badtlv: static int decode_labeled_vpn_prefix6(netdissect_options *ndo, - const u_char *pptr, char *buf, u_int buflen) + const u_char *pptr, char *buf, size_t buflen) { - struct in6_addr addr; + nd_ipv6 addr; u_int plen; - ND_TCHECK_1(pptr); - plen = EXTRACT_U_1(pptr); /* get prefix length */ + plen = GET_U_1(pptr); /* get prefix length */ if ((24+64) > plen) return -1; @@ -1325,65 +1444,56 @@ decode_labeled_vpn_prefix6(netdissect_options *ndo, return -1; memset(&addr, 0, sizeof(addr)); - ND_TCHECK_LEN(pptr + 12, (plen + 7) / 8); - memcpy(&addr, pptr + 12, (plen + 7) / 8); + GET_CPY_BYTES(&addr, pptr + 12, (plen + 7) / 8); if (plen % 8) { - addr.s6_addr[(plen + 7) / 8 - 1] &= + addr[(plen + 7) / 8 - 1] &= ((0xff00 >> (plen % 8)) & 0xff); } /* the label may get offsetted by 4 bits so lets shift it right */ - nd_snprintf(buf, buflen, "RD: %s, %s/%u, label:%u %s", + snprintf(buf, buflen, "RD: %s, %s/%u, label:%u %s", bgp_vpn_rd_print(ndo, pptr+4), ip6addr_string(ndo, (const u_char *)&addr), plen, - EXTRACT_BE_U_3(pptr + 1)>>4, - ((EXTRACT_U_1(pptr + 3) & 1) == 0) ? "(BOGUS: Bottom of Stack NOT set!)" : "(bottom)" ); + GET_BE_U_3(pptr + 1)>>4, + ((GET_U_1(pptr + 3) & 1) == 0) ? "(BOGUS: Bottom of Stack NOT set!)" : "(bottom)" ); return 12 + (plen + 7) / 8; - -trunc: - return -2; } static int decode_clnp_prefix(netdissect_options *ndo, - const u_char *pptr, char *buf, u_int buflen) + const u_char *pptr, char *buf, size_t buflen) { uint8_t addr[19]; u_int plen; - ND_TCHECK_1(pptr); - plen = EXTRACT_U_1(pptr); /* get prefix length */ + plen = GET_U_1(pptr); /* get prefix length */ if (152 < plen) return -1; memset(&addr, 0, sizeof(addr)); - ND_TCHECK_LEN(pptr + 4, (plen + 7) / 8); - memcpy(&addr, pptr + 4, (plen + 7) / 8); + GET_CPY_BYTES(&addr, pptr + 4, (plen + 7) / 8); if (plen % 8) { addr[(plen + 7) / 8 - 1] &= ((0xff00 >> (plen % 8)) & 0xff); } - nd_snprintf(buf, buflen, "%s/%u", + /* Cannot use GET_ISONSAP_STRING (not packet buffer pointer) */ + snprintf(buf, buflen, "%s/%u", isonsap_string(ndo, addr,(plen + 7) / 8), plen); return 1 + (plen + 7) / 8; - -trunc: - return -2; } static int decode_labeled_vpn_clnp_prefix(netdissect_options *ndo, - const u_char *pptr, char *buf, u_int buflen) + const u_char *pptr, char *buf, size_t buflen) { uint8_t addr[19]; u_int plen; - ND_TCHECK_1(pptr); - plen = EXTRACT_U_1(pptr); /* get prefix length */ + plen = GET_U_1(pptr); /* get prefix length */ if ((24+64) > plen) return -1; @@ -1394,23 +1504,20 @@ decode_labeled_vpn_clnp_prefix(netdissect_options *ndo, return -1; memset(&addr, 0, sizeof(addr)); - ND_TCHECK_LEN(pptr + 12, (plen + 7) / 8); - memcpy(&addr, pptr + 12, (plen + 7) / 8); + GET_CPY_BYTES(&addr, pptr + 12, (plen + 7) / 8); if (plen % 8) { addr[(plen + 7) / 8 - 1] &= ((0xff00 >> (plen % 8)) & 0xff); } /* the label may get offsetted by 4 bits so lets shift it right */ - nd_snprintf(buf, buflen, "RD: %s, %s/%u, label:%u %s", + /* Cannot use GET_ISONSAP_STRING (not packet buffer pointer) */ + snprintf(buf, buflen, "RD: %s, %s/%u, label:%u %s", bgp_vpn_rd_print(ndo, pptr+4), isonsap_string(ndo, addr,(plen + 7) / 8), plen, - EXTRACT_BE_U_3(pptr + 1)>>4, - ((EXTRACT_U_1(pptr + 3) & 1) == 0) ? "(BOGUS: Bottom of Stack NOT set!)" : "(bottom)" ); + GET_BE_U_3(pptr + 1)>>4, + ((GET_U_1(pptr + 3) & 1) == 0) ? "(BOGUS: Bottom of Stack NOT set!)" : "(bottom)" ); return 12 + (plen + 7) / 8; - -trunc: - return -2; } /* @@ -1440,16 +1547,13 @@ bgp_attr_get_as_size(netdissect_options *ndo, * each. */ while (tptr < pptr + len) { - ND_TCHECK_1(tptr); - /* * If we do not find a valid segment type, our guess might be wrong. */ - if (EXTRACT_U_1(tptr) < BGP_AS_SEG_TYPE_MIN || EXTRACT_U_1(tptr) > BGP_AS_SEG_TYPE_MAX) { + if (GET_U_1(tptr) < BGP_AS_SEG_TYPE_MIN || GET_U_1(tptr) > BGP_AS_SEG_TYPE_MAX) { goto trunc; } - ND_TCHECK_1(tptr + 1); - tptr += 2 + EXTRACT_U_1(tptr + 1) * 2; + tptr += 2 + GET_U_1(tptr + 1) * 2; } /* @@ -1497,7 +1601,7 @@ check_add_path(netdissect_options *ndo, const u_char *pptr, u_int length, /* We ran out of captured data; quit scanning. */ break; } - prefix_length = EXTRACT_U_1(pptr + offset); + prefix_length = GET_U_1(pptr + offset); /* * Add 4 to cover the path id * and check the prefix length isn't greater than 32/128. @@ -1519,7 +1623,7 @@ check_add_path(netdissect_options *ndo, const u_char *pptr, u_int length, /* We ran out of captured data; quit scanning. */ break; } - prefix_length = EXTRACT_U_1(pptr + offset); + prefix_length = GET_U_1(pptr + offset); /* * If the prefix_length is zero (0.0.0.0/0) * and since it's not the only address (length >= 5) @@ -1538,9 +1642,226 @@ check_add_path(netdissect_options *ndo, const u_char *pptr, u_int length, return 0; } +static int +bgp_mp_af_print(netdissect_options *ndo, + const u_char *tptr, u_int tlen, + uint16_t *afp, uint8_t *safip) +{ + uint16_t af; + uint8_t safi; + + af = GET_BE_U_2(tptr); + *afp = af; + safi = GET_U_1(tptr + 2); + *safip = safi; + + ND_PRINT("\n\t AFI: %s (%u), %sSAFI: %s (%u)", + tok2str(af_values, "Unknown AFI", af), + af, + (safi>128) ? "vendor specific " : "", /* 128 is meanwhile wellknown */ + tok2str(bgp_safi_values, "Unknown SAFI", safi), + safi); + + switch(af<<8 | safi) { + case (AFNUM_INET<<8 | SAFNUM_UNICAST): + case (AFNUM_INET<<8 | SAFNUM_MULTICAST): + case (AFNUM_INET<<8 | SAFNUM_UNIMULTICAST): + case (AFNUM_INET<<8 | SAFNUM_LABUNICAST): + case (AFNUM_INET<<8 | SAFNUM_RT_ROUTING_INFO): + case (AFNUM_INET<<8 | SAFNUM_VPNUNICAST): + case (AFNUM_INET<<8 | SAFNUM_VPNMULTICAST): + case (AFNUM_INET<<8 | SAFNUM_VPNUNIMULTICAST): + case (AFNUM_INET<<8 | SAFNUM_MULTICAST_VPN): + case (AFNUM_INET<<8 | SAFNUM_MDT): + case (AFNUM_INET6<<8 | SAFNUM_UNICAST): + case (AFNUM_INET6<<8 | SAFNUM_MULTICAST): + case (AFNUM_INET6<<8 | SAFNUM_UNIMULTICAST): + case (AFNUM_INET6<<8 | SAFNUM_LABUNICAST): + case (AFNUM_INET6<<8 | SAFNUM_VPNUNICAST): + case (AFNUM_INET6<<8 | SAFNUM_VPNMULTICAST): + case (AFNUM_INET6<<8 | SAFNUM_VPNUNIMULTICAST): + case (AFNUM_NSAP<<8 | SAFNUM_UNICAST): + case (AFNUM_NSAP<<8 | SAFNUM_MULTICAST): + case (AFNUM_NSAP<<8 | SAFNUM_UNIMULTICAST): + case (AFNUM_NSAP<<8 | SAFNUM_VPNUNICAST): + case (AFNUM_NSAP<<8 | SAFNUM_VPNMULTICAST): + case (AFNUM_NSAP<<8 | SAFNUM_VPNUNIMULTICAST): + case (AFNUM_L2VPN<<8 | SAFNUM_VPNUNICAST): + case (AFNUM_L2VPN<<8 | SAFNUM_VPNMULTICAST): + case (AFNUM_L2VPN<<8 | SAFNUM_VPNUNIMULTICAST): + case (AFNUM_VPLS<<8 | SAFNUM_VPLS): + break; + default: + ND_TCHECK_LEN(tptr, tlen); + ND_PRINT("\n\t no AFI %u / SAFI %u decoder", af, safi); + if (ndo->ndo_vflag <= 1) + print_unknown_data(ndo, tptr, "\n\t ", tlen); + return -1; + } + return 0; +trunc: + return -2; +} + +static int +bgp_nlri_print(netdissect_options *ndo, uint16_t af, uint8_t safi, + const u_char *tptr, u_int len, + char *buf, size_t buflen, + int add_path4, int add_path6) +{ + int advance; + u_int path_id = 0; + + switch (af<<8 | safi) { + case (AFNUM_INET<<8 | SAFNUM_UNICAST): + case (AFNUM_INET<<8 | SAFNUM_MULTICAST): + case (AFNUM_INET<<8 | SAFNUM_UNIMULTICAST): + if (add_path4) { + path_id = GET_BE_U_4(tptr); + tptr += 4; + } + advance = decode_prefix4(ndo, tptr, len, buf, buflen); + if (advance == -1) + ND_PRINT("\n\t (illegal prefix length)"); + else if (advance == -2) + break; /* bytes left, but not enough */ + else + ND_PRINT("\n\t %s", buf); + if (add_path4) { + ND_PRINT(" Path Id: %u", path_id); + advance += 4; + } + break; + case (AFNUM_INET<<8 | SAFNUM_LABUNICAST): + advance = decode_labeled_prefix4(ndo, tptr, len, buf, buflen); + if (advance == -1) + ND_PRINT("\n\t (illegal prefix length)"); + else if (advance == -2) + goto trunc; + else if (advance == -3) + break; /* bytes left, but not enough */ + else + ND_PRINT("\n\t %s", buf); + break; + case (AFNUM_INET<<8 | SAFNUM_VPNUNICAST): + case (AFNUM_INET<<8 | SAFNUM_VPNMULTICAST): + case (AFNUM_INET<<8 | SAFNUM_VPNUNIMULTICAST): + advance = decode_labeled_vpn_prefix4(ndo, tptr, buf, buflen); + if (advance == -1) + ND_PRINT("\n\t (illegal prefix length)"); + else + ND_PRINT("\n\t %s", buf); + break; + case (AFNUM_INET<<8 | SAFNUM_RT_ROUTING_INFO): + advance = decode_rt_routing_info(ndo, tptr); + break; + case (AFNUM_INET<<8 | SAFNUM_MULTICAST_VPN): /* fall through */ + case (AFNUM_INET6<<8 | SAFNUM_MULTICAST_VPN): + advance = decode_multicast_vpn(ndo, tptr, buf, buflen); + if (advance == -1) + ND_PRINT("\n\t (illegal prefix length)"); + else if (advance == -2) + goto trunc; + else + ND_PRINT("\n\t %s", buf); + break; + + case (AFNUM_INET<<8 | SAFNUM_MDT): + advance = decode_mdt_vpn_nlri(ndo, tptr, buf, buflen); + if (advance == -1) + ND_PRINT("\n\t (illegal prefix length)"); + else if (advance == -2) + goto trunc; + else + ND_PRINT("\n\t %s", buf); + break; + case (AFNUM_INET6<<8 | SAFNUM_UNICAST): + case (AFNUM_INET6<<8 | SAFNUM_MULTICAST): + case (AFNUM_INET6<<8 | SAFNUM_UNIMULTICAST): + if (add_path6) { + path_id = GET_BE_U_4(tptr); + tptr += 4; + } + advance = decode_prefix6(ndo, tptr, len, buf, buflen); + if (advance == -1) + ND_PRINT("\n\t (illegal prefix length)"); + else if (advance == -2) + break; /* bytes left, but not enough */ + else + ND_PRINT("\n\t %s", buf); + if (add_path6) { + ND_PRINT(" Path Id: %u", path_id); + advance += 4; + } + break; + case (AFNUM_INET6<<8 | SAFNUM_LABUNICAST): + advance = decode_labeled_prefix6(ndo, tptr, len, buf, buflen); + if (advance == -1) + ND_PRINT("\n\t (illegal prefix length)"); + else if (advance == -2) + goto trunc; + else if (advance == -3) + break; /* bytes left, but not enough */ + else + ND_PRINT("\n\t %s", buf); + break; + case (AFNUM_INET6<<8 | SAFNUM_VPNUNICAST): + case (AFNUM_INET6<<8 | SAFNUM_VPNMULTICAST): + case (AFNUM_INET6<<8 | SAFNUM_VPNUNIMULTICAST): + advance = decode_labeled_vpn_prefix6(ndo, tptr, buf, buflen); + if (advance == -1) + ND_PRINT("\n\t (illegal prefix length)"); + else + ND_PRINT("\n\t %s", buf); + break; + case (AFNUM_VPLS<<8 | SAFNUM_VPLS): + case (AFNUM_L2VPN<<8 | SAFNUM_VPNUNICAST): + case (AFNUM_L2VPN<<8 | SAFNUM_VPNMULTICAST): + case (AFNUM_L2VPN<<8 | SAFNUM_VPNUNIMULTICAST): + advance = decode_labeled_vpn_l2(ndo, tptr, buf, buflen); + if (advance == -1) + ND_PRINT("\n\t (illegal length)"); + else if (advance == -2) + goto trunc; + else + ND_PRINT("\n\t %s", buf); + break; + case (AFNUM_NSAP<<8 | SAFNUM_UNICAST): + case (AFNUM_NSAP<<8 | SAFNUM_MULTICAST): + case (AFNUM_NSAP<<8 | SAFNUM_UNIMULTICAST): + advance = decode_clnp_prefix(ndo, tptr, buf, buflen); + if (advance == -1) + ND_PRINT("\n\t (illegal prefix length)"); + else + ND_PRINT("\n\t %s", buf); + break; + case (AFNUM_NSAP<<8 | SAFNUM_VPNUNICAST): + case (AFNUM_NSAP<<8 | SAFNUM_VPNMULTICAST): + case (AFNUM_NSAP<<8 | SAFNUM_VPNUNIMULTICAST): + advance = decode_labeled_vpn_clnp_prefix(ndo, tptr, buf, buflen); + if (advance == -1) + ND_PRINT("\n\t (illegal prefix length)"); + else + ND_PRINT("\n\t %s", buf); + break; + default: + /* + * This should not happen, we should have been protected + * by bgp_mp_af_print()'s return value. + */ + ND_PRINT("\n\t ERROR: no AFI %u / SAFI %u decoder", af, safi); + advance = -4; + break; + } + return advance; +trunc: /* we rely on the caller to recognize -2 return value */ + return -2; +} + static int bgp_attr_print(netdissect_options *ndo, - u_int atype, const u_char *pptr, u_int len) + uint8_t atype, const u_char *pptr, u_int len, + const unsigned attr_set_level) { u_int i; uint16_t af; @@ -1551,7 +1872,7 @@ bgp_attr_print(netdissect_options *ndo, char buf[MAXHOSTNAMELEN + 100]; u_int as_size; int add_path4, add_path6; - u_int path_id = 0; + int ret; tptr = pptr; tlen = len; @@ -1561,10 +1882,9 @@ bgp_attr_print(netdissect_options *ndo, if (len != 1) ND_PRINT("invalid len"); else { - ND_TCHECK_1(tptr); ND_PRINT("%s", tok2str(bgp_origin_values, "Unknown Origin Typecode", - EXTRACT_U_1(tptr))); + GET_U_1(tptr))); } break; @@ -1593,31 +1913,26 @@ bgp_attr_print(netdissect_options *ndo, as_size = bgp_attr_get_as_size(ndo, atype, pptr, len); while (tptr < pptr + len) { - ND_TCHECK_1(tptr); ND_PRINT("%s", tok2str(bgp_as_path_segment_open_values, - "?", EXTRACT_U_1(tptr))); - ND_TCHECK_1(tptr + 1); - for (i = 0; i < EXTRACT_U_1(tptr + 1) * as_size; i += as_size) { + "?", GET_U_1(tptr))); + for (i = 0; i < GET_U_1(tptr + 1) * as_size; i += as_size) { ND_TCHECK_LEN(tptr + 2 + i, as_size); ND_PRINT("%s ", as_printf(ndo, astostr, sizeof(astostr), as_size == 2 ? - EXTRACT_BE_U_2(tptr + i + 2) : - EXTRACT_BE_U_4(tptr + i + 2))); + GET_BE_U_2(tptr + i + 2) : + GET_BE_U_4(tptr + i + 2))); } - ND_TCHECK_1(tptr); ND_PRINT("%s", tok2str(bgp_as_path_segment_close_values, - "?", EXTRACT_U_1(tptr))); - ND_TCHECK_1(tptr + 1); - tptr += 2 + EXTRACT_U_1(tptr + 1) * as_size; + "?", GET_U_1(tptr))); + tptr += 2 + GET_U_1(tptr + 1) * as_size; } break; case BGPTYPE_NEXT_HOP: if (len != 4) ND_PRINT("invalid len"); else { - ND_TCHECK_4(tptr); - ND_PRINT("%s", ipaddr_string(ndo, tptr)); + ND_PRINT("%s", GET_IPADDR_STRING(tptr)); } break; case BGPTYPE_MULTI_EXIT_DISC: @@ -1625,8 +1940,7 @@ bgp_attr_print(netdissect_options *ndo, if (len != 4) ND_PRINT("invalid len"); else { - ND_TCHECK_4(tptr); - ND_PRINT("%u", EXTRACT_BE_U_4(tptr)); + ND_PRINT("%u", GET_BE_U_4(tptr)); } break; case BGPTYPE_ATOMIC_AGGREGATE: @@ -1646,12 +1960,12 @@ bgp_attr_print(netdissect_options *ndo, ND_TCHECK_LEN(tptr, len); if (len == 6) { ND_PRINT(" AS #%s, origin %s", - as_printf(ndo, astostr, sizeof(astostr), EXTRACT_BE_U_2(tptr)), - ipaddr_string(ndo, tptr + 2)); + as_printf(ndo, astostr, sizeof(astostr), GET_BE_U_2(tptr)), + GET_IPADDR_STRING(tptr + 2)); } else { ND_PRINT(" AS #%s, origin %s", as_printf(ndo, astostr, sizeof(astostr), - EXTRACT_BE_U_4(tptr)), ipaddr_string(ndo, tptr + 4)); + GET_BE_U_4(tptr)), GET_IPADDR_STRING(tptr + 4)); } break; case BGPTYPE_AGGREGATOR4: @@ -1659,10 +1973,9 @@ bgp_attr_print(netdissect_options *ndo, ND_PRINT("invalid len"); break; } - ND_TCHECK_8(tptr); ND_PRINT(" AS #%s, origin %s", - as_printf(ndo, astostr, sizeof(astostr), EXTRACT_BE_U_4(tptr)), - ipaddr_string(ndo, tptr + 4)); + as_printf(ndo, astostr, sizeof(astostr), GET_BE_U_4(tptr)), + GET_IPADDR_STRING(tptr + 4)); break; case BGPTYPE_COMMUNITIES: if (len % 4) { @@ -1674,7 +1987,7 @@ bgp_attr_print(netdissect_options *ndo, ND_TCHECK_4(tptr); if (tlen < 4) goto trunc; - comm = EXTRACT_BE_U_4(tptr); + comm = GET_BE_U_4(tptr); switch (comm) { case BGP_COMMUNITY_NO_EXPORT: ND_PRINT(" NO_EXPORT"); @@ -1701,8 +2014,7 @@ bgp_attr_print(netdissect_options *ndo, ND_PRINT("invalid len"); break; } - ND_TCHECK_4(tptr); - ND_PRINT("%s",ipaddr_string(ndo, tptr)); + ND_PRINT("%s",GET_IPADDR_STRING(tptr)); break; case BGPTYPE_CLUSTER_LIST: if (len % 4) { @@ -1710,11 +2022,10 @@ bgp_attr_print(netdissect_options *ndo, break; } while (tlen != 0) { - ND_TCHECK_4(tptr); if (tlen < 4) goto trunc; ND_PRINT("%s%s", - ipaddr_string(ndo, tptr), + GET_IPADDR_STRING(tptr), (tlen>4) ? ", " : ""); tlen -=4; tptr +=4; @@ -1724,65 +2035,29 @@ bgp_attr_print(netdissect_options *ndo, ND_TCHECK_3(tptr); if (tlen < 3) goto trunc; - af = EXTRACT_BE_U_2(tptr); - safi = EXTRACT_U_1(tptr + 2); + ret = bgp_mp_af_print(ndo, tptr, tlen, &af, &safi); + if (ret == -2) + goto trunc; + if (ret < 0) + break; - ND_PRINT("\n\t AFI: %s (%u), %sSAFI: %s (%u)", - tok2str(af_values, "Unknown AFI", af), - af, - (safi>128) ? "vendor specific " : "", /* 128 is meanwhile wellknown */ - tok2str(bgp_safi_values, "Unknown SAFI", safi), - safi); - - switch(af<<8 | safi) { - case (AFNUM_INET<<8 | SAFNUM_UNICAST): - case (AFNUM_INET<<8 | SAFNUM_MULTICAST): - case (AFNUM_INET<<8 | SAFNUM_UNIMULTICAST): - case (AFNUM_INET<<8 | SAFNUM_LABUNICAST): - case (AFNUM_INET<<8 | SAFNUM_RT_ROUTING_INFO): - case (AFNUM_INET<<8 | SAFNUM_VPNUNICAST): - case (AFNUM_INET<<8 | SAFNUM_VPNMULTICAST): - case (AFNUM_INET<<8 | SAFNUM_VPNUNIMULTICAST): - case (AFNUM_INET<<8 | SAFNUM_MULTICAST_VPN): - case (AFNUM_INET<<8 | SAFNUM_MDT): - case (AFNUM_INET6<<8 | SAFNUM_UNICAST): - case (AFNUM_INET6<<8 | SAFNUM_MULTICAST): - case (AFNUM_INET6<<8 | SAFNUM_UNIMULTICAST): - case (AFNUM_INET6<<8 | SAFNUM_LABUNICAST): - case (AFNUM_INET6<<8 | SAFNUM_VPNUNICAST): - case (AFNUM_INET6<<8 | SAFNUM_VPNMULTICAST): - case (AFNUM_INET6<<8 | SAFNUM_VPNUNIMULTICAST): - case (AFNUM_NSAP<<8 | SAFNUM_UNICAST): - case (AFNUM_NSAP<<8 | SAFNUM_MULTICAST): - case (AFNUM_NSAP<<8 | SAFNUM_UNIMULTICAST): - case (AFNUM_NSAP<<8 | SAFNUM_VPNUNICAST): - case (AFNUM_NSAP<<8 | SAFNUM_VPNMULTICAST): - case (AFNUM_NSAP<<8 | SAFNUM_VPNUNIMULTICAST): - case (AFNUM_L2VPN<<8 | SAFNUM_VPNUNICAST): - case (AFNUM_L2VPN<<8 | SAFNUM_VPNMULTICAST): - case (AFNUM_L2VPN<<8 | SAFNUM_VPNUNIMULTICAST): - case (AFNUM_VPLS<<8 | SAFNUM_VPLS): - break; - default: - ND_TCHECK_LEN(tptr, tlen); - ND_PRINT("\n\t no AFI %u / SAFI %u decoder", af, safi); - if (ndo->ndo_vflag <= 1) - print_unknown_data(ndo, tptr, "\n\t ", tlen); - goto done; - break; - } - - tptr +=3; + tptr += 3; + tlen -= 3; ND_TCHECK_1(tptr); - nhlen = EXTRACT_U_1(tptr); - tlen = nhlen; + if (tlen < 1) + goto trunc; + nhlen = GET_U_1(tptr); tptr++; + tlen--; - if (tlen) { + if (nhlen) { u_int nnh = 0; + uint8_t tnhlen = nhlen; + if (tlen < tnhlen) + goto trunc; ND_PRINT("\n\t nexthop: "); - while (tlen != 0) { + while (tnhlen != 0) { if (nnh++ > 0) { ND_PRINT(", " ); } @@ -1794,468 +2069,195 @@ bgp_attr_print(netdissect_options *ndo, case (AFNUM_INET<<8 | SAFNUM_RT_ROUTING_INFO): case (AFNUM_INET<<8 | SAFNUM_MULTICAST_VPN): case (AFNUM_INET<<8 | SAFNUM_MDT): - if (tlen < sizeof(nd_ipv4)) { + if (tnhlen < sizeof(nd_ipv4)) { ND_PRINT("invalid len"); - tlen = 0; + tptr += tnhlen; + tlen -= tnhlen; + tnhlen = 0; } else { - ND_TCHECK_LEN(tptr, sizeof(nd_ipv4)); - ND_PRINT("%s",ipaddr_string(ndo, tptr)); - tlen -= sizeof(nd_ipv4); + ND_PRINT("%s",GET_IPADDR_STRING(tptr)); tptr += sizeof(nd_ipv4); + tnhlen -= sizeof(nd_ipv4); + tlen -= sizeof(nd_ipv4); } break; case (AFNUM_INET<<8 | SAFNUM_VPNUNICAST): case (AFNUM_INET<<8 | SAFNUM_VPNMULTICAST): case (AFNUM_INET<<8 | SAFNUM_VPNUNIMULTICAST): - if (tlen < sizeof(nd_ipv4)+BGP_VPN_RD_LEN) { + if (tnhlen < sizeof(nd_ipv4)+BGP_VPN_RD_LEN) { ND_PRINT("invalid len"); - tlen = 0; + tptr += tnhlen; + tlen -= tnhlen; + tnhlen = 0; } else { - ND_TCHECK_LEN(tptr, - sizeof(nd_ipv4) + BGP_VPN_RD_LEN); ND_PRINT("RD: %s, %s", bgp_vpn_rd_print(ndo, tptr), - ipaddr_string(ndo, tptr+BGP_VPN_RD_LEN)); - tlen -= (sizeof(nd_ipv4)+BGP_VPN_RD_LEN); + GET_IPADDR_STRING(tptr+BGP_VPN_RD_LEN)); tptr += (sizeof(nd_ipv4)+BGP_VPN_RD_LEN); + tlen -= (sizeof(nd_ipv4)+BGP_VPN_RD_LEN); + tnhlen -= (sizeof(nd_ipv4)+BGP_VPN_RD_LEN); } break; case (AFNUM_INET6<<8 | SAFNUM_UNICAST): case (AFNUM_INET6<<8 | SAFNUM_MULTICAST): case (AFNUM_INET6<<8 | SAFNUM_UNIMULTICAST): case (AFNUM_INET6<<8 | SAFNUM_LABUNICAST): - if (tlen < sizeof(nd_ipv6)) { + if (tnhlen < sizeof(nd_ipv6)) { ND_PRINT("invalid len"); - tlen = 0; + tptr += tnhlen; + tlen -= tnhlen; + tnhlen = 0; } else { - ND_TCHECK_LEN(tptr, sizeof(nd_ipv6)); - ND_PRINT("%s", ip6addr_string(ndo, tptr)); - tlen -= sizeof(nd_ipv6); + ND_PRINT("%s", GET_IP6ADDR_STRING(tptr)); tptr += sizeof(nd_ipv6); + tlen -= sizeof(nd_ipv6); + tnhlen -= sizeof(nd_ipv6); } break; case (AFNUM_INET6<<8 | SAFNUM_VPNUNICAST): case (AFNUM_INET6<<8 | SAFNUM_VPNMULTICAST): case (AFNUM_INET6<<8 | SAFNUM_VPNUNIMULTICAST): - if (tlen < sizeof(nd_ipv6)+BGP_VPN_RD_LEN) { + if (tnhlen < sizeof(nd_ipv6)+BGP_VPN_RD_LEN) { ND_PRINT("invalid len"); - tlen = 0; + tptr += tnhlen; + tlen -= tnhlen; + tnhlen = 0; } else { - ND_TCHECK_LEN(tptr, - sizeof(nd_ipv6) + BGP_VPN_RD_LEN); ND_PRINT("RD: %s, %s", bgp_vpn_rd_print(ndo, tptr), - ip6addr_string(ndo, tptr+BGP_VPN_RD_LEN)); - tlen -= (sizeof(nd_ipv6)+BGP_VPN_RD_LEN); + GET_IP6ADDR_STRING(tptr+BGP_VPN_RD_LEN)); tptr += (sizeof(nd_ipv6)+BGP_VPN_RD_LEN); + tlen -= (sizeof(nd_ipv6)+BGP_VPN_RD_LEN); + tnhlen -= (sizeof(nd_ipv6)+BGP_VPN_RD_LEN); } break; case (AFNUM_VPLS<<8 | SAFNUM_VPLS): case (AFNUM_L2VPN<<8 | SAFNUM_VPNUNICAST): case (AFNUM_L2VPN<<8 | SAFNUM_VPNMULTICAST): case (AFNUM_L2VPN<<8 | SAFNUM_VPNUNIMULTICAST): - if (tlen < sizeof(nd_ipv4)) { + if (tnhlen < sizeof(nd_ipv4)) { ND_PRINT("invalid len"); - tlen = 0; + tptr += tnhlen; + tlen -= tnhlen; + tnhlen = 0; } else { - ND_TCHECK_LEN(tptr, sizeof(nd_ipv4)); - ND_PRINT("%s", ipaddr_string(ndo, tptr)); - tlen -= (sizeof(nd_ipv4)); + ND_PRINT("%s", GET_IPADDR_STRING(tptr)); tptr += (sizeof(nd_ipv4)); + tlen -= (sizeof(nd_ipv4)); + tnhlen -= (sizeof(nd_ipv4)); } break; case (AFNUM_NSAP<<8 | SAFNUM_UNICAST): case (AFNUM_NSAP<<8 | SAFNUM_MULTICAST): case (AFNUM_NSAP<<8 | SAFNUM_UNIMULTICAST): - ND_TCHECK_LEN(tptr, tlen); - ND_PRINT("%s", isonsap_string(ndo, tptr, tlen)); - tptr += tlen; - tlen = 0; + ND_PRINT("%s", GET_ISONSAP_STRING(tptr, tnhlen)); + tptr += tnhlen; + tlen -= tnhlen; + tnhlen = 0; break; case (AFNUM_NSAP<<8 | SAFNUM_VPNUNICAST): case (AFNUM_NSAP<<8 | SAFNUM_VPNMULTICAST): case (AFNUM_NSAP<<8 | SAFNUM_VPNUNIMULTICAST): - if (tlen < BGP_VPN_RD_LEN+1) { + if (tnhlen < BGP_VPN_RD_LEN+1) { ND_PRINT("invalid len"); - tlen = 0; + tptr += tnhlen; + tlen -= tnhlen; + tnhlen = 0; } else { - ND_TCHECK_LEN(tptr, tlen); + ND_TCHECK_LEN(tptr, tnhlen); ND_PRINT("RD: %s, %s", bgp_vpn_rd_print(ndo, tptr), - isonsap_string(ndo, tptr+BGP_VPN_RD_LEN,tlen-BGP_VPN_RD_LEN)); + GET_ISONSAP_STRING(tptr+BGP_VPN_RD_LEN,tnhlen-BGP_VPN_RD_LEN)); /* rfc986 mapped IPv4 address ? */ - if (EXTRACT_BE_U_4(tptr + BGP_VPN_RD_LEN) == 0x47000601) - ND_PRINT(" = %s", ipaddr_string(ndo, tptr+BGP_VPN_RD_LEN+4)); + if (GET_BE_U_4(tptr + BGP_VPN_RD_LEN) == 0x47000601) + ND_PRINT(" = %s", GET_IPADDR_STRING(tptr+BGP_VPN_RD_LEN+4)); /* rfc1888 mapped IPv6 address ? */ - else if (EXTRACT_BE_U_3(tptr + BGP_VPN_RD_LEN) == 0x350000) - ND_PRINT(" = %s", ip6addr_string(ndo, tptr+BGP_VPN_RD_LEN+3)); - tptr += tlen; - tlen = 0; + else if (GET_BE_U_3(tptr + BGP_VPN_RD_LEN) == 0x350000) + ND_PRINT(" = %s", GET_IP6ADDR_STRING(tptr+BGP_VPN_RD_LEN+3)); + tptr += tnhlen; + tlen -= tnhlen; + tnhlen = 0; } break; default: - ND_TCHECK_LEN(tptr, tlen); - ND_PRINT("no AFI %u/SAFI %u decoder", af, safi); - if (ndo->ndo_vflag <= 1) - print_unknown_data(ndo, tptr, "\n\t ", tlen); - tptr += tlen; - tlen = 0; + /* + * bgp_mp_af_print() should have saved us from + * an unsupported AFI/SAFI. + */ + ND_PRINT("ERROR: no AFI %u/SAFI %u nexthop decoder", af, safi); + tptr += tnhlen; + tlen -= tnhlen; + tnhlen = 0; goto done; break; } } } ND_PRINT(", nh-length: %u", nhlen); - tptr += tlen; - ND_TCHECK_1(tptr); - snpa = EXTRACT_U_1(tptr); + /* As per RFC 2858; this is reserved in RFC 4760 */ + if (tlen < 1) + goto trunc; + snpa = GET_U_1(tptr); tptr++; + tlen--; if (snpa) { ND_PRINT("\n\t %u SNPA", snpa); for (/*nothing*/; snpa != 0; snpa--) { - ND_TCHECK_1(tptr); - ND_PRINT("\n\t %u bytes", EXTRACT_U_1(tptr)); - tptr += EXTRACT_U_1(tptr) + 1; + uint8_t snpalen; + if (tlen < 1) + goto trunc; + snpalen = GET_U_1(tptr); + ND_PRINT("\n\t %u bytes", snpalen); + tptr++; + tlen--; + if (tlen < snpalen) + goto trunc; + ND_TCHECK_LEN(tptr, snpalen); + tptr += snpalen; + tlen -= snpalen; } } else { ND_PRINT(", no SNPA"); } - add_path4 = check_add_path(ndo, tptr, (len-(tptr - pptr)), 32); - add_path6 = check_add_path(ndo, tptr, (len-(tptr - pptr)), 128); + add_path4 = check_add_path(ndo, tptr, (len-ND_BYTES_BETWEEN(tptr, pptr)), 32); + add_path6 = check_add_path(ndo, tptr, (len-ND_BYTES_BETWEEN(tptr, pptr)), 128); while (tptr < pptr + len) { - switch (af<<8 | safi) { - case (AFNUM_INET<<8 | SAFNUM_UNICAST): - case (AFNUM_INET<<8 | SAFNUM_MULTICAST): - case (AFNUM_INET<<8 | SAFNUM_UNIMULTICAST): - if (add_path4) { - path_id = EXTRACT_BE_U_4(tptr); - tptr += 4; - } - advance = decode_prefix4(ndo, tptr, len, buf, sizeof(buf)); - if (advance == -1) - ND_PRINT("\n\t (illegal prefix length)"); - else if (advance == -2) - goto trunc; - else if (advance == -3) - break; /* bytes left, but not enough */ - else - ND_PRINT("\n\t %s", buf); - if (add_path4) { - ND_PRINT(" Path Id: %u", path_id); - } - break; - case (AFNUM_INET<<8 | SAFNUM_LABUNICAST): - advance = decode_labeled_prefix4(ndo, tptr, len, buf, sizeof(buf)); - if (advance == -1) - ND_PRINT("\n\t (illegal prefix length)"); - else if (advance == -2) - goto trunc; - else if (advance == -3) - break; /* bytes left, but not enough */ - else - ND_PRINT("\n\t %s", buf); - break; - case (AFNUM_INET<<8 | SAFNUM_VPNUNICAST): - case (AFNUM_INET<<8 | SAFNUM_VPNMULTICAST): - case (AFNUM_INET<<8 | SAFNUM_VPNUNIMULTICAST): - advance = decode_labeled_vpn_prefix4(ndo, tptr, buf, sizeof(buf)); - if (advance == -1) - ND_PRINT("\n\t (illegal prefix length)"); - else if (advance == -2) - goto trunc; - else - ND_PRINT("\n\t %s", buf); - break; - case (AFNUM_INET<<8 | SAFNUM_RT_ROUTING_INFO): - advance = decode_rt_routing_info(ndo, tptr); - if (advance == -2) - goto trunc; - break; - case (AFNUM_INET<<8 | SAFNUM_MULTICAST_VPN): /* fall through */ - case (AFNUM_INET6<<8 | SAFNUM_MULTICAST_VPN): - advance = decode_multicast_vpn(ndo, tptr, buf, sizeof(buf)); - if (advance == -1) - ND_PRINT("\n\t (illegal prefix length)"); - else if (advance == -2) - goto trunc; - else - ND_PRINT("\n\t %s", buf); - break; - - case (AFNUM_INET<<8 | SAFNUM_MDT): - advance = decode_mdt_vpn_nlri(ndo, tptr, buf, sizeof(buf)); - if (advance == -1) - ND_PRINT("\n\t (illegal prefix length)"); - else if (advance == -2) - goto trunc; - else - ND_PRINT("\n\t %s", buf); - break; - case (AFNUM_INET6<<8 | SAFNUM_UNICAST): - case (AFNUM_INET6<<8 | SAFNUM_MULTICAST): - case (AFNUM_INET6<<8 | SAFNUM_UNIMULTICAST): - if (add_path6) { - path_id = EXTRACT_BE_U_4(tptr); - tptr += 4; - } - advance = decode_prefix6(ndo, tptr, len, buf, sizeof(buf)); - if (advance == -1) - ND_PRINT("\n\t (illegal prefix length)"); - else if (advance == -2) - goto trunc; - else if (advance == -3) - break; /* bytes left, but not enough */ - else - ND_PRINT("\n\t %s", buf); - if (add_path6) { - ND_PRINT(" Path Id: %u", path_id); - } - break; - case (AFNUM_INET6<<8 | SAFNUM_LABUNICAST): - advance = decode_labeled_prefix6(ndo, tptr, len, buf, sizeof(buf)); - if (advance == -1) - ND_PRINT("\n\t (illegal prefix length)"); - else if (advance == -2) - goto trunc; - else if (advance == -3) - break; /* bytes left, but not enough */ - else - ND_PRINT("\n\t %s", buf); - break; - case (AFNUM_INET6<<8 | SAFNUM_VPNUNICAST): - case (AFNUM_INET6<<8 | SAFNUM_VPNMULTICAST): - case (AFNUM_INET6<<8 | SAFNUM_VPNUNIMULTICAST): - advance = decode_labeled_vpn_prefix6(ndo, tptr, buf, sizeof(buf)); - if (advance == -1) - ND_PRINT("\n\t (illegal prefix length)"); - else if (advance == -2) - goto trunc; - else - ND_PRINT("\n\t %s", buf); - break; - case (AFNUM_VPLS<<8 | SAFNUM_VPLS): - case (AFNUM_L2VPN<<8 | SAFNUM_VPNUNICAST): - case (AFNUM_L2VPN<<8 | SAFNUM_VPNMULTICAST): - case (AFNUM_L2VPN<<8 | SAFNUM_VPNUNIMULTICAST): - advance = decode_labeled_vpn_l2(ndo, tptr, buf, sizeof(buf)); - if (advance == -1) - ND_PRINT("\n\t (illegal length)"); - else if (advance == -2) - goto trunc; - else - ND_PRINT("\n\t %s", buf); - break; - case (AFNUM_NSAP<<8 | SAFNUM_UNICAST): - case (AFNUM_NSAP<<8 | SAFNUM_MULTICAST): - case (AFNUM_NSAP<<8 | SAFNUM_UNIMULTICAST): - advance = decode_clnp_prefix(ndo, tptr, buf, sizeof(buf)); - if (advance == -1) - ND_PRINT("\n\t (illegal prefix length)"); - else if (advance == -2) - goto trunc; - else - ND_PRINT("\n\t %s", buf); - break; - case (AFNUM_NSAP<<8 | SAFNUM_VPNUNICAST): - case (AFNUM_NSAP<<8 | SAFNUM_VPNMULTICAST): - case (AFNUM_NSAP<<8 | SAFNUM_VPNUNIMULTICAST): - advance = decode_labeled_vpn_clnp_prefix(ndo, tptr, buf, sizeof(buf)); - if (advance == -1) - ND_PRINT("\n\t (illegal prefix length)"); - else if (advance == -2) - goto trunc; - else - ND_PRINT("\n\t %s", buf); - break; - default: - ND_TCHECK_LEN(tptr, tlen); - ND_PRINT("\n\t no AFI %u / SAFI %u decoder", af, safi); - if (ndo->ndo_vflag <= 1) - print_unknown_data(ndo, tptr, "\n\t ", tlen); - advance = 0; - tptr = pptr + len; - break; - } + advance = bgp_nlri_print(ndo, af, safi, tptr, len, buf, sizeof(buf), + add_path4, add_path6); + if (advance == -2) + goto trunc; if (advance < 0) break; tptr += advance; } - done: break; case BGPTYPE_MP_UNREACH_NLRI: ND_TCHECK_LEN(tptr, BGP_MP_NLRI_MINSIZE); - af = EXTRACT_BE_U_2(tptr); - safi = EXTRACT_U_1(tptr + 2); - - ND_PRINT("\n\t AFI: %s (%u), %sSAFI: %s (%u)", - tok2str(af_values, "Unknown AFI", af), - af, - (safi>128) ? "vendor specific " : "", /* 128 is meanwhile wellknown */ - tok2str(bgp_safi_values, "Unknown SAFI", safi), - safi); + ret = bgp_mp_af_print(ndo, tptr, tlen, &af, &safi); + if (ret == -2) + goto trunc; + if (ret < 0) + break; if (len == BGP_MP_NLRI_MINSIZE) ND_PRINT("\n\t End-of-Rib Marker (empty NLRI)"); tptr += 3; - add_path4 = check_add_path(ndo, tptr, (len-(tptr - pptr)), 32); - add_path6 = check_add_path(ndo, tptr, (len-(tptr - pptr)), 128); + add_path4 = check_add_path(ndo, tptr, (len-ND_BYTES_BETWEEN(tptr, pptr)), 32); + add_path6 = check_add_path(ndo, tptr, (len-ND_BYTES_BETWEEN(tptr, pptr)), 128); while (tptr < pptr + len) { - switch (af<<8 | safi) { - case (AFNUM_INET<<8 | SAFNUM_UNICAST): - case (AFNUM_INET<<8 | SAFNUM_MULTICAST): - case (AFNUM_INET<<8 | SAFNUM_UNIMULTICAST): - if (add_path4) { - path_id = EXTRACT_BE_U_4(tptr); - tptr += 4; - } - advance = decode_prefix4(ndo, tptr, len, buf, sizeof(buf)); - if (advance == -1) - ND_PRINT("\n\t (illegal prefix length)"); - else if (advance == -2) - goto trunc; - else if (advance == -3) - break; /* bytes left, but not enough */ - else - ND_PRINT("\n\t %s", buf); - if (add_path4) { - ND_PRINT(" Path Id: %u", path_id); - } - break; - case (AFNUM_INET<<8 | SAFNUM_LABUNICAST): - advance = decode_labeled_prefix4(ndo, tptr, len, buf, sizeof(buf)); - if (advance == -1) - ND_PRINT("\n\t (illegal prefix length)"); - else if (advance == -2) - goto trunc; - else if (advance == -3) - break; /* bytes left, but not enough */ - else - ND_PRINT("\n\t %s", buf); - break; - case (AFNUM_INET<<8 | SAFNUM_VPNUNICAST): - case (AFNUM_INET<<8 | SAFNUM_VPNMULTICAST): - case (AFNUM_INET<<8 | SAFNUM_VPNUNIMULTICAST): - advance = decode_labeled_vpn_prefix4(ndo, tptr, buf, sizeof(buf)); - if (advance == -1) - ND_PRINT("\n\t (illegal prefix length)"); - else if (advance == -2) - goto trunc; - else - ND_PRINT("\n\t %s", buf); - break; - case (AFNUM_INET6<<8 | SAFNUM_UNICAST): - case (AFNUM_INET6<<8 | SAFNUM_MULTICAST): - case (AFNUM_INET6<<8 | SAFNUM_UNIMULTICAST): - if (add_path6) { - path_id = EXTRACT_BE_U_4(tptr); - tptr += 4; - } - advance = decode_prefix6(ndo, tptr, len, buf, sizeof(buf)); - if (advance == -1) - ND_PRINT("\n\t (illegal prefix length)"); - else if (advance == -2) - goto trunc; - else if (advance == -3) - break; /* bytes left, but not enough */ - else - ND_PRINT("\n\t %s", buf); - if (add_path6) { - ND_PRINT(" Path Id: %u", path_id); - } - break; - case (AFNUM_INET6<<8 | SAFNUM_LABUNICAST): - advance = decode_labeled_prefix6(ndo, tptr, len, buf, sizeof(buf)); - if (advance == -1) - ND_PRINT("\n\t (illegal prefix length)"); - else if (advance == -2) - goto trunc; - else if (advance == -3) - break; /* bytes left, but not enough */ - else - ND_PRINT("\n\t %s", buf); - break; - case (AFNUM_INET6<<8 | SAFNUM_VPNUNICAST): - case (AFNUM_INET6<<8 | SAFNUM_VPNMULTICAST): - case (AFNUM_INET6<<8 | SAFNUM_VPNUNIMULTICAST): - advance = decode_labeled_vpn_prefix6(ndo, tptr, buf, sizeof(buf)); - if (advance == -1) - ND_PRINT("\n\t (illegal prefix length)"); - else if (advance == -2) - goto trunc; - else - ND_PRINT("\n\t %s", buf); - break; - case (AFNUM_VPLS<<8 | SAFNUM_VPLS): - case (AFNUM_L2VPN<<8 | SAFNUM_VPNUNICAST): - case (AFNUM_L2VPN<<8 | SAFNUM_VPNMULTICAST): - case (AFNUM_L2VPN<<8 | SAFNUM_VPNUNIMULTICAST): - advance = decode_labeled_vpn_l2(ndo, tptr, buf, sizeof(buf)); - if (advance == -1) - ND_PRINT("\n\t (illegal length)"); - else if (advance == -2) - goto trunc; - else - ND_PRINT("\n\t %s", buf); - break; - case (AFNUM_NSAP<<8 | SAFNUM_UNICAST): - case (AFNUM_NSAP<<8 | SAFNUM_MULTICAST): - case (AFNUM_NSAP<<8 | SAFNUM_UNIMULTICAST): - advance = decode_clnp_prefix(ndo, tptr, buf, sizeof(buf)); - if (advance == -1) - ND_PRINT("\n\t (illegal prefix length)"); - else if (advance == -2) - goto trunc; - else - ND_PRINT("\n\t %s", buf); - break; - case (AFNUM_NSAP<<8 | SAFNUM_VPNUNICAST): - case (AFNUM_NSAP<<8 | SAFNUM_VPNMULTICAST): - case (AFNUM_NSAP<<8 | SAFNUM_VPNUNIMULTICAST): - advance = decode_labeled_vpn_clnp_prefix(ndo, tptr, buf, sizeof(buf)); - if (advance == -1) - ND_PRINT("\n\t (illegal prefix length)"); - else if (advance == -2) - goto trunc; - else - ND_PRINT("\n\t %s", buf); - break; - case (AFNUM_INET<<8 | SAFNUM_MDT): - advance = decode_mdt_vpn_nlri(ndo, tptr, buf, sizeof(buf)); - if (advance == -1) - ND_PRINT("\n\t (illegal prefix length)"); - else if (advance == -2) - goto trunc; - else - ND_PRINT("\n\t %s", buf); - break; - case (AFNUM_INET<<8 | SAFNUM_MULTICAST_VPN): /* fall through */ - case (AFNUM_INET6<<8 | SAFNUM_MULTICAST_VPN): - advance = decode_multicast_vpn(ndo, tptr, buf, sizeof(buf)); - if (advance == -1) - ND_PRINT("\n\t (illegal prefix length)"); - else if (advance == -2) - goto trunc; - else - ND_PRINT("\n\t %s", buf); - break; - default: - ND_TCHECK_LEN(tptr - 3, tlen); - ND_PRINT("no AFI %u / SAFI %u decoder", af, safi); - if (ndo->ndo_vflag <= 1) - print_unknown_data(ndo, tptr-3, "\n\t ", tlen); - advance = 0; - tptr = pptr + len; - break; - } + advance = bgp_nlri_print(ndo, af, safi, tptr, len, buf, sizeof(buf), + add_path4, add_path6); + if (advance == -2) + goto trunc; if (advance < 0) break; tptr += advance; @@ -2272,7 +2274,7 @@ bgp_attr_print(netdissect_options *ndo, ND_TCHECK_2(tptr); if (tlen < 2) goto trunc; - extd_comm=EXTRACT_BE_U_2(tptr); + extd_comm=GET_BE_U_2(tptr); ND_PRINT("\n\t %s (0x%04x), Flags [%s]", tok2str(bgp_extd_comm_subtype_values, @@ -2298,15 +2300,14 @@ bgp_attr_print(netdissect_options *ndo, ND_TCHECK_5(tptr); if (tlen < 5) goto trunc; - flags = EXTRACT_U_1(tptr); - tunnel_type = EXTRACT_U_1(tptr + 1); - tlen = len; + flags = GET_U_1(tptr); + tunnel_type = GET_U_1(tptr + 1); ND_PRINT("\n\t Tunnel-type %s (%u), Flags [%s], MPLS Label %u", tok2str(bgp_pmsi_tunnel_values, "Unknown", tunnel_type), tunnel_type, bittok2str(bgp_pmsi_flag_values, "none", flags), - EXTRACT_BE_U_3(tptr + 2)>>4); + GET_BE_U_3(tptr + 2)>>4); tptr +=5; tlen -= 5; @@ -2314,35 +2315,30 @@ bgp_attr_print(netdissect_options *ndo, switch (tunnel_type) { case BGP_PMSI_TUNNEL_PIM_SM: /* fall through */ case BGP_PMSI_TUNNEL_PIM_BIDIR: - ND_TCHECK_8(tptr); ND_PRINT("\n\t Sender %s, P-Group %s", - ipaddr_string(ndo, tptr), - ipaddr_string(ndo, tptr+4)); + GET_IPADDR_STRING(tptr), + GET_IPADDR_STRING(tptr+4)); break; case BGP_PMSI_TUNNEL_PIM_SSM: - ND_TCHECK_8(tptr); ND_PRINT("\n\t Root-Node %s, P-Group %s", - ipaddr_string(ndo, tptr), - ipaddr_string(ndo, tptr+4)); + GET_IPADDR_STRING(tptr), + GET_IPADDR_STRING(tptr+4)); break; case BGP_PMSI_TUNNEL_INGRESS: - ND_TCHECK_4(tptr); ND_PRINT("\n\t Tunnel-Endpoint %s", - ipaddr_string(ndo, tptr)); + GET_IPADDR_STRING(tptr)); break; case BGP_PMSI_TUNNEL_LDP_P2MP: /* fall through */ case BGP_PMSI_TUNNEL_LDP_MP2MP: - ND_TCHECK_8(tptr); ND_PRINT("\n\t Root-Node %s, LSP-ID 0x%08x", - ipaddr_string(ndo, tptr), - EXTRACT_BE_U_4(tptr + 4)); + GET_IPADDR_STRING(tptr), + GET_BE_U_4(tptr + 4)); break; case BGP_PMSI_TUNNEL_RSVP_P2MP: - ND_TCHECK_8(tptr); ND_PRINT("\n\t Extended-Tunnel-ID %s, P2MP-ID 0x%08x", - ipaddr_string(ndo, tptr), - EXTRACT_BE_U_4(tptr + 4)); + GET_IPADDR_STRING(tptr), + GET_BE_U_4(tptr + 4)); break; default: if (ndo->ndo_vflag <= 1) { @@ -2356,14 +2352,9 @@ bgp_attr_print(netdissect_options *ndo, uint8_t type; uint16_t length; - tlen = len; - while (tlen >= 3) { - - ND_TCHECK_3(tptr); - - type = EXTRACT_U_1(tptr); - length = EXTRACT_BE_U_2(tptr + 1); + type = GET_U_1(tptr); + length = GET_BE_U_2(tptr + 1); tptr += 3; tlen -= 3; @@ -2388,7 +2379,7 @@ bgp_attr_print(netdissect_options *ndo, if (length < 8) goto trunc; ND_PRINT(", metric %" PRIu64, - EXTRACT_BE_U_8(tptr)); + GET_BE_U_8(tptr)); break; default: @@ -2407,7 +2398,7 @@ bgp_attr_print(netdissect_options *ndo, if (len < 4) goto trunc; ND_PRINT("\n\t Origin AS: %s", - as_printf(ndo, astostr, sizeof(astostr), EXTRACT_BE_U_4(tptr))); + as_printf(ndo, astostr, sizeof(astostr), GET_BE_U_4(tptr))); tptr += 4; len -= 4; @@ -2420,8 +2411,8 @@ bgp_attr_print(netdissect_options *ndo, tptr += len; break; } - aflags = EXTRACT_U_1(tptr); - atype = EXTRACT_U_1(tptr + 1); + aflags = GET_U_1(tptr); + atype = GET_U_1(tptr + 1); tptr += 2; len -= 2; alenlen = bgp_attr_lenlen(aflags, tptr); @@ -2457,8 +2448,18 @@ bgp_attr_print(netdissect_options *ndo, tptr += len; break; } - /* FIXME check for recursion */ - if (!bgp_attr_print(ndo, atype, tptr, alen)) + /* + * The protocol encoding per se allows ATTR_SET to be nested + * as many times as the message can accommodate. This printer + * used to be able to recurse into ATTR_SET contents until the + * stack exhaustion, but now there is a limit on that (if live + * protocol exchange goes that many levels deep, something is + * probably wrong anyway). Feel free to refine this value if + * you can find the spec with respective normative text. + */ + if (attr_set_level == 10) + ND_PRINT("(too many nested levels, not recursing)"); + else if (!bgp_attr_print(ndo, atype, tptr, alen, attr_set_level + 1)) return 0; tptr += alen; len -= alen; @@ -2472,11 +2473,10 @@ bgp_attr_print(netdissect_options *ndo, } ND_PRINT("\n\t "); while (len != 0) { - ND_TCHECK_LEN(tptr, 12); ND_PRINT("%u:%u:%u%s", - EXTRACT_BE_U_4(tptr), - EXTRACT_BE_U_4(tptr + 4), - EXTRACT_BE_U_4(tptr + 8), + GET_BE_U_4(tptr), + GET_BE_U_4(tptr + 4), + GET_BE_U_4(tptr + 8), (len > 12) ? ", " : ""); tptr += 12; /* @@ -2493,6 +2493,7 @@ bgp_attr_print(netdissect_options *ndo, print_unknown_data(ndo, pptr, "\n\t ", len); break; } +done: if (ndo->ndo_vflag > 1 && len) { /* omit zero length attributes*/ ND_TCHECK_LEN(pptr, len); print_unknown_data(ndo, pptr, "\n\t ", len); @@ -2512,8 +2513,8 @@ bgp_capabilities_print(netdissect_options *ndo, while (i < caps_len) { ND_TCHECK_LEN(opt + i, BGP_CAP_HEADER_SIZE); - cap_type=EXTRACT_U_1(opt + i); - cap_len=EXTRACT_U_1(opt + i + 1); + cap_type=GET_U_1(opt + i); + cap_len=GET_U_1(opt + i + 1); ND_PRINT("\n\t %s (%u), length: %u", tok2str(bgp_capcode_values, "Unknown", cap_type), cap_type, @@ -2527,10 +2528,26 @@ bgp_capabilities_print(netdissect_options *ndo, return; } ND_PRINT("\n\t\tAFI %s (%u), SAFI %s (%u)", - tok2str(af_values, "Unknown", EXTRACT_BE_U_2(opt + i + 2)), - EXTRACT_BE_U_2(opt + i + 2), - tok2str(bgp_safi_values, "Unknown", EXTRACT_U_1(opt + i + 5)), - EXTRACT_U_1(opt + i + 5)); + tok2str(af_values, "Unknown", GET_BE_U_2(opt + i + 2)), + GET_BE_U_2(opt + i + 2), + tok2str(bgp_safi_values, "Unknown", GET_U_1(opt + i + 5)), + GET_U_1(opt + i + 5)); + break; + case BGP_CAPCODE_ML: + cap_offset = 2; + tcap_len = cap_len; + while (tcap_len >= 4) { + ND_PRINT( "\n\t\tAFI %s (%u), SAFI %s (%u), Count: %u", + tok2str(af_values, "Unknown", + GET_BE_U_2(opt + i + cap_offset)), + GET_BE_U_2(opt + i + cap_offset), + tok2str(bgp_safi_values, "Unknown", + GET_U_1(opt + i + cap_offset + 2)), + GET_U_1(opt + i + cap_offset + 2), + GET_U_1(opt + i + cap_offset + 3)); + tcap_len -= 4; + cap_offset += 4; + } break; case BGP_CAPCODE_RESTART: /* Restart Flags (4 bits), Restart Time in seconds (12 bits) */ @@ -2540,24 +2557,25 @@ bgp_capabilities_print(netdissect_options *ndo, } tcap_len=cap_len; ND_PRINT("\n\t\tRestart Flags: [%s], Restart Time %us", - ((EXTRACT_U_1(opt + i + 2))&0x80) ? "R" : "none", - EXTRACT_BE_U_2(opt + i + 2)&0xfff); + ((GET_U_1(opt + i + 2))&0x80) ? "R" : "none", + GET_BE_U_2(opt + i + 2)&0xfff); tcap_len-=2; cap_offset=4; while(tcap_len>=4) { ND_PRINT("\n\t\t AFI %s (%u), SAFI %s (%u), Forwarding state preserved: %s", tok2str(af_values,"Unknown", - EXTRACT_BE_U_2(opt + i + cap_offset)), - EXTRACT_BE_U_2(opt + i + cap_offset), + GET_BE_U_2(opt + i + cap_offset)), + GET_BE_U_2(opt + i + cap_offset), tok2str(bgp_safi_values,"Unknown", - EXTRACT_U_1(opt + i + cap_offset + 2)), - EXTRACT_U_1(opt + (i + cap_offset + 2)), - ((EXTRACT_U_1(opt + (i + cap_offset + 3)))&0x80) ? "yes" : "no" ); + GET_U_1(opt + i + cap_offset + 2)), + GET_U_1(opt + (i + cap_offset + 2)), + ((GET_U_1(opt + (i + cap_offset + 3)))&0x80) ? "yes" : "no" ); tcap_len -= 4; cap_offset += 4; } break; case BGP_CAPCODE_RR: + case BGP_CAPCODE_LLGR: case BGP_CAPCODE_RR_CISCO: break; case BGP_CAPCODE_AS_NEW: @@ -2570,7 +2588,7 @@ bgp_capabilities_print(netdissect_options *ndo, } ND_PRINT("\n\t\t 4 Byte AS %s", as_printf(ndo, astostr, sizeof(astostr), - EXTRACT_BE_U_4(opt + i + 2))); + GET_BE_U_4(opt + i + 2))); break; case BGP_CAPCODE_ADD_PATH: if (cap_len == 0) { @@ -2585,11 +2603,11 @@ bgp_capabilities_print(netdissect_options *ndo, break; } ND_PRINT("\n\t\tAFI %s (%u), SAFI %s (%u), Send/Receive: %s", - tok2str(af_values,"Unknown",EXTRACT_BE_U_2(opt + i + cap_offset)), - EXTRACT_BE_U_2(opt + i + cap_offset), - tok2str(bgp_safi_values,"Unknown",EXTRACT_U_1(opt + i + cap_offset + 2)), - EXTRACT_U_1(opt + (i + cap_offset + 2)), - tok2str(bgp_add_path_recvsend,"Bogus (0x%02x)",EXTRACT_U_1(opt + i + cap_offset + 3)) + tok2str(af_values,"Unknown",GET_BE_U_2(opt + i + cap_offset)), + GET_BE_U_2(opt + i + cap_offset), + tok2str(bgp_safi_values,"Unknown",GET_U_1(opt + i + cap_offset + 2)), + GET_U_1(opt + (i + cap_offset + 2)), + tok2str(bgp_add_path_recvsend,"Bogus (0x%02x)",GET_U_1(opt + i + cap_offset + 3)) ); tcap_len -= 4; cap_offset += 4; @@ -2631,13 +2649,13 @@ bgp_open_print(netdissect_options *ndo, bgp_open_header = (const struct bgp_open *)dat; ND_PRINT("\n\t Version %u, ", - EXTRACT_U_1(bgp_open_header->bgpo_version)); + GET_U_1(bgp_open_header->bgpo_version)); ND_PRINT("my AS %s, ", - as_printf(ndo, astostr, sizeof(astostr), EXTRACT_BE_U_2(bgp_open_header->bgpo_myas))); + as_printf(ndo, astostr, sizeof(astostr), GET_BE_U_2(bgp_open_header->bgpo_myas))); ND_PRINT("Holdtime %us, ", - EXTRACT_BE_U_2(bgp_open_header->bgpo_holdtime)); - ND_PRINT("ID %s", ipaddr_string(ndo, bgp_open_header->bgpo_id)); - optslen = EXTRACT_U_1(bgp_open_header->bgpo_optlen); + GET_BE_U_2(bgp_open_header->bgpo_holdtime)); + ND_PRINT("ID %s", GET_IPADDR_STRING(bgp_open_header->bgpo_id)); + optslen = GET_U_1(bgp_open_header->bgpo_optlen); ND_PRINT("\n\t Optional parameters, length: %u", optslen); opt = dat + BGP_OPEN_SIZE; @@ -2651,8 +2669,8 @@ bgp_open_print(netdissect_options *ndo, if (length < BGP_OPT_SIZE + i) goto trunc; bgpopt = (const struct bgp_opt *)(opt + i); - opt_type = EXTRACT_U_1(bgpopt->bgpopt_type); - opt_len = EXTRACT_U_1(bgpopt->bgpopt_len); + opt_type = GET_U_1(bgpopt->bgpopt_type); + opt_len = GET_U_1(bgpopt->bgpopt_len); if (BGP_OPT_SIZE + i + opt_len > optslen) { ND_PRINT("\n\t Option %u, length: %u, goes past the end of the options", opt_type, opt_len); @@ -2708,7 +2726,7 @@ bgp_update_print(netdissect_options *ndo, ND_TCHECK_2(p); if (length < 2) goto trunc; - withdrawn_routes_len = EXTRACT_BE_U_2(p); + withdrawn_routes_len = GET_BE_U_2(p); p += 2; length -= 2; if (withdrawn_routes_len > 1) { @@ -2729,7 +2747,7 @@ bgp_update_print(netdissect_options *ndo, length -= withdrawn_routes_len; break; } - path_id = EXTRACT_BE_U_4(p); + path_id = GET_BE_U_4(p); p += 4; length -= 4; withdrawn_routes_len -= 4; @@ -2739,8 +2757,6 @@ bgp_update_print(netdissect_options *ndo, ND_PRINT("\n\t (illegal prefix length)"); break; } else if (wpfx == -2) - goto trunc; - else if (wpfx == -3) goto trunc; /* bytes left, but not enough */ else { ND_PRINT("\n\t %s", buf); @@ -2763,7 +2779,7 @@ bgp_update_print(netdissect_options *ndo, ND_TCHECK_2(p); if (length < 2) goto trunc; - len = EXTRACT_BE_U_2(p); + len = GET_BE_U_2(p); p += 2; length -= 2; @@ -2776,7 +2792,8 @@ bgp_update_print(netdissect_options *ndo, if (len) { /* do something more useful!*/ while (len) { - u_int aflags, atype, alenlen, alen; + uint8_t aflags, atype, alenlen; + uint16_t alen; ND_TCHECK_2(p); if (length < 2) @@ -2787,8 +2804,8 @@ bgp_update_print(netdissect_options *ndo, length -= len; break; } - aflags = EXTRACT_U_1(p); - atype = EXTRACT_U_1(p + 1); + aflags = GET_U_1(p); + atype = GET_U_1(p + 1); p += 2; len -= 2; length -= 2; @@ -2830,7 +2847,7 @@ bgp_update_print(netdissect_options *ndo, } if (length < alen) goto trunc; - if (!bgp_attr_print(ndo, atype, p, alen)) + if (!bgp_attr_print(ndo, atype, p, alen, 0)) goto trunc; p += alen; len -= alen; @@ -2846,7 +2863,7 @@ bgp_update_print(netdissect_options *ndo, ND_TCHECK_4(p); if (length < 4) goto trunc; - path_id = EXTRACT_BE_U_4(p); + path_id = GET_BE_U_4(p); p += 4; length -= 4; } @@ -2855,8 +2872,6 @@ bgp_update_print(netdissect_options *ndo, ND_PRINT("\n\t (illegal prefix length)"); break; } else if (i == -2) - goto trunc; - else if (i == -3) goto trunc; /* bytes left, but not enough */ else { ND_PRINT("\n\t %s", buf); @@ -2888,8 +2903,8 @@ bgp_notification_print(netdissect_options *ndo, return; bgp_notification_header = (const struct bgp_notification *)dat; - bgpn_major = EXTRACT_U_1(bgp_notification_header->bgpn_major); - bgpn_minor = EXTRACT_U_1(bgp_notification_header->bgpn_minor); + bgpn_major = GET_U_1(bgp_notification_header->bgpn_major); + bgpn_minor = GET_U_1(bgp_notification_header->bgpn_minor); ND_PRINT(", %s (%u)", tok2str(bgp_notify_major_values, "Unknown Error", @@ -2939,13 +2954,12 @@ bgp_notification_print(netdissect_options *ndo, */ if(bgpn_minor == BGP_NOTIFY_MINOR_CEASE_MAXPRFX && length >= BGP_NOTIFICATION_SIZE + 7) { tptr = dat + BGP_NOTIFICATION_SIZE; - ND_TCHECK_7(tptr); ND_PRINT(", AFI %s (%u), SAFI %s (%u), Max Prefixes: %u", - tok2str(af_values, "Unknown", EXTRACT_BE_U_2(tptr)), - EXTRACT_BE_U_2(tptr), - tok2str(bgp_safi_values, "Unknown", EXTRACT_U_1((tptr + 2))), - EXTRACT_U_1((tptr + 2)), - EXTRACT_BE_U_4(tptr + 3)); + tok2str(af_values, "Unknown", GET_BE_U_2(tptr)), + GET_BE_U_2(tptr), + tok2str(bgp_safi_values, "Unknown", GET_U_1((tptr + 2))), + GET_U_1((tptr + 2)), + GET_BE_U_4(tptr + 3)); } /* * draft-ietf-idr-shutdown describes a method to send a communication @@ -2955,8 +2969,7 @@ bgp_notification_print(netdissect_options *ndo, bgpn_minor == BGP_NOTIFY_MINOR_CEASE_RESET) && length >= BGP_NOTIFICATION_SIZE + 1) { tptr = dat + BGP_NOTIFICATION_SIZE; - ND_TCHECK_1(tptr); - shutdown_comm_length = EXTRACT_U_1(tptr); + shutdown_comm_length = GET_U_1(tptr); remainder_offset = 0; /* garbage, hexdump it all */ if (shutdown_comm_length > BGP_NOTIFY_MINOR_CEASE_ADMIN_SHUTDOWN_LEN || @@ -2971,7 +2984,7 @@ bgp_notification_print(netdissect_options *ndo, else { ND_TCHECK_LEN(tptr + 1, shutdown_comm_length); ND_PRINT(", Shutdown Communication (length: %u): \"", shutdown_comm_length); - (void)nd_printn(ndo, tptr+1, shutdown_comm_length, NULL); + nd_printjn(ndo, tptr+1, shutdown_comm_length); ND_PRINT("\""); remainder_offset += shutdown_comm_length + 1; } @@ -3007,11 +3020,11 @@ bgp_route_refresh_print(netdissect_options *ndo, ND_PRINT("\n\t AFI %s (%u), SAFI %s (%u)", tok2str(af_values,"Unknown", - EXTRACT_BE_U_2(bgp_route_refresh_header->afi)), - EXTRACT_BE_U_2(bgp_route_refresh_header->afi), + GET_BE_U_2(bgp_route_refresh_header->afi)), + GET_BE_U_2(bgp_route_refresh_header->afi), tok2str(bgp_safi_values,"Unknown", - EXTRACT_U_1(bgp_route_refresh_header->safi)), - EXTRACT_U_1(bgp_route_refresh_header->safi)); + GET_U_1(bgp_route_refresh_header->safi)), + GET_U_1(bgp_route_refresh_header->safi)); if (ndo->ndo_vflag > 1) { ND_TCHECK_LEN(pptr, len); @@ -3032,7 +3045,7 @@ bgp_pdu_print(netdissect_options *ndo, ND_TCHECK_LEN(dat, BGP_SIZE); bgp_header = (const struct bgp *)dat; - bgp_type = EXTRACT_U_1(bgp_header->bgp_type); + bgp_type = GET_U_1(bgp_header->bgp_type); ND_PRINT("\n\t%s Message (%u), length: %u", tok2str(bgp_msg_values, "Unknown", bgp_type), @@ -3092,7 +3105,7 @@ bgp_print(netdissect_options *ndo, while (p < ep) { if (!ND_TTEST_1(p)) break; - if (EXTRACT_U_1(p) != 0xff) { + if (GET_U_1(p) != 0xff) { p++; continue; } @@ -3111,7 +3124,7 @@ bgp_print(netdissect_options *ndo, if (start != p) nd_print_trunc(ndo); - hlen = EXTRACT_BE_U_2(bgp_header->bgp_len); + hlen = GET_BE_U_2(bgp_header->bgp_len); if (hlen < BGP_SIZE) { ND_PRINT("\nmessage length %u < %u", hlen, BGP_SIZE); nd_print_invalid(ndo); @@ -3127,7 +3140,7 @@ bgp_print(netdissect_options *ndo, ND_PRINT("\n[|BGP %s]", tok2str(bgp_msg_values, "Unknown Message Type", - EXTRACT_U_1(bgp_header->bgp_type))); + GET_U_1(bgp_header->bgp_type))); break; } }