X-Git-Url: https://git.tcpdump.org/tcpdump/blobdiff_plain/77a49fcb6ee80c8a107dd179e445c4eb9aab48e7..9169e4e1949c3fa879f0a2f98cfbd8c444743c27:/print-ospf.c diff --git a/print-ospf.c b/print-ospf.c index 2a502a6c..a385d7a1 100644 --- a/print-ospf.c +++ b/print-ospf.c @@ -38,11 +38,11 @@ static const struct tok ospf_option_values[] = { - { OSPF_OPTION_T, "MultiTopology" }, /* draft-ietf-ospf-mt-09 */ + { OSPF_OPTION_MT, "MultiTopology" }, /* draft-ietf-ospf-mt-09 */ { OSPF_OPTION_E, "External" }, { OSPF_OPTION_MC, "Multicast" }, { OSPF_OPTION_NP, "NSSA" }, - { OSPF_OPTION_L, "LLS" }, + { OSPF_OPTION_L, "LLS" }, { OSPF_OPTION_DC, "Demand Circuit" }, { OSPF_OPTION_O, "Opaque" }, { OSPF_OPTION_DN, "Up/Down" }, @@ -191,8 +191,8 @@ ospf_grace_lsa_print(netdissect_options *ndo, ND_PRINT("\n\t Remaining LS length %u < 4", ls_length); return -1; } - tlv_type = EXTRACT_BE_U_2(tptr); - tlv_length = EXTRACT_BE_U_2(tptr + 2); + tlv_type = GET_BE_U_2(tptr); + tlv_length = GET_BE_U_2(tptr + 2); tptr+=4; ls_length-=4; @@ -220,7 +220,7 @@ ospf_grace_lsa_print(netdissect_options *ndo, ND_PRINT("\n\t Bogus length %u != 4", tlv_length); return -1; } - ND_PRINT("%us", EXTRACT_BE_U_4(tptr)); + ND_PRINT("%us", GET_BE_U_4(tptr)); break; case LS_OPAQUE_GRACE_TLV_REASON: @@ -229,8 +229,8 @@ ospf_grace_lsa_print(netdissect_options *ndo, return -1; } ND_PRINT("%s (%u)", - tok2str(lsa_opaque_grace_tlv_reason_values, "Unknown", EXTRACT_U_1(tptr)), - EXTRACT_U_1(tptr)); + tok2str(lsa_opaque_grace_tlv_reason_values, "Unknown", GET_U_1(tptr)), + GET_U_1(tptr)); break; case LS_OPAQUE_GRACE_TLV_INT_ADDRESS: @@ -238,7 +238,7 @@ ospf_grace_lsa_print(netdissect_options *ndo, ND_PRINT("\n\t Bogus length %u != 4", tlv_length); return -1; } - ND_PRINT("%s", ipaddr_string(ndo, tptr)); + ND_PRINT("%s", GET_IPADDR_STRING(tptr)); break; default: @@ -278,8 +278,8 @@ ospf_te_lsa_print(netdissect_options *ndo, ND_PRINT("\n\t Remaining LS length %u < 4", ls_length); return -1; } - tlv_type = EXTRACT_BE_U_2(tptr); - tlv_length = EXTRACT_BE_U_2(tptr + 2); + tlv_type = GET_BE_U_2(tptr); + tlv_length = GET_BE_U_2(tptr + 2); tptr+=4; ls_length-=4; @@ -301,15 +301,14 @@ ospf_te_lsa_print(netdissect_options *ndo, switch(tlv_type) { case LS_OPAQUE_TE_TLV_LINK: - while (tlv_length >= sizeof(subtlv_type) + sizeof(subtlv_length)) { + while (tlv_length != 0) { if (tlv_length < 4) { ND_PRINT("\n\t Remaining TLV length %u < 4", tlv_length); return -1; } - ND_TCHECK_4(tptr); - subtlv_type = EXTRACT_BE_U_2(tptr); - subtlv_length = EXTRACT_BE_U_2(tptr + 2); + subtlv_type = GET_BE_U_2(tptr); + subtlv_length = GET_BE_U_2(tptr + 2); tptr+=4; tlv_length-=4; @@ -322,6 +321,11 @@ ospf_te_lsa_print(netdissect_options *ndo, subtlv_type, subtlv_length); + if (tlv_length < subtlv_length) { + ND_PRINT("\n\t Remaining TLV length %u < %u", + tlv_length + 4, subtlv_length + 4); + return -1; + } ND_TCHECK_LEN(tptr, subtlv_length); switch(subtlv_type) { case LS_OPAQUE_TE_LINK_SUBTLV_ADMIN_GROUP: @@ -329,7 +333,7 @@ ospf_te_lsa_print(netdissect_options *ndo, ND_PRINT(" != 4"); goto invalid; } - ND_PRINT(", 0x%08x", EXTRACT_BE_U_4(tptr)); + ND_PRINT(", 0x%08x", GET_BE_U_4(tptr)); break; case LS_OPAQUE_TE_LINK_SUBTLV_LINK_ID: case LS_OPAQUE_TE_LINK_SUBTLV_LINK_LOCAL_REMOTE_ID: @@ -338,12 +342,12 @@ ospf_te_lsa_print(netdissect_options *ndo, goto invalid; } ND_PRINT(", %s (0x%08x)", - ipaddr_string(ndo, tptr), - EXTRACT_BE_U_4(tptr)); + GET_IPADDR_STRING(tptr), + GET_BE_U_4(tptr)); if (subtlv_length == 8) /* rfc4203 */ ND_PRINT(", %s (0x%08x)", - ipaddr_string(ndo, tptr+4), - EXTRACT_BE_U_4(tptr + 4)); + GET_IPADDR_STRING(tptr+4), + GET_BE_U_4(tptr + 4)); break; case LS_OPAQUE_TE_LINK_SUBTLV_LOCAL_IP: case LS_OPAQUE_TE_LINK_SUBTLV_REMOTE_IP: @@ -351,7 +355,7 @@ ospf_te_lsa_print(netdissect_options *ndo, ND_PRINT(" != 4"); goto invalid; } - ND_PRINT(", %s", ipaddr_string(ndo, tptr)); + ND_PRINT(", %s", GET_IPADDR_STRING(tptr)); break; case LS_OPAQUE_TE_LINK_SUBTLV_MAX_BW: case LS_OPAQUE_TE_LINK_SUBTLV_MAX_RES_BW: @@ -359,7 +363,7 @@ ospf_te_lsa_print(netdissect_options *ndo, ND_PRINT(" != 4"); goto invalid; } - bw.i = EXTRACT_BE_U_4(tptr); + bw.i = GET_BE_U_4(tptr); ND_PRINT(", %.3f Mbps", bw.f * 8 / 1000000); break; case LS_OPAQUE_TE_LINK_SUBTLV_UNRES_BW: @@ -368,7 +372,7 @@ ospf_te_lsa_print(netdissect_options *ndo, goto invalid; } for (te_class = 0; te_class < 8; te_class++) { - bw.i = EXTRACT_BE_U_4(tptr + te_class * 4); + bw.i = GET_BE_U_4(tptr + te_class * 4); ND_PRINT("\n\t\tTE-Class %u: %.3f Mbps", te_class, bw.f * 8 / 1000000); @@ -381,8 +385,8 @@ ospf_te_lsa_print(netdissect_options *ndo, } /* BC Model Id (1 octet) + Reserved (3 octets) */ ND_PRINT("\n\t\tBandwidth Constraints Model ID: %s (%u)", - tok2str(diffserv_te_bc_values, "unknown", EXTRACT_U_1(tptr)), - EXTRACT_U_1(tptr)); + tok2str(diffserv_te_bc_values, "unknown", GET_U_1(tptr)), + GET_U_1(tptr)); if (subtlv_length % 4 != 0) { ND_PRINT("\n\t\tlength %u != N x 4", subtlv_length); goto invalid; @@ -393,7 +397,7 @@ ospf_te_lsa_print(netdissect_options *ndo, } /* decode BCs until the subTLV ends */ for (te_class = 0; te_class < (subtlv_length-4)/4; te_class++) { - bw.i = EXTRACT_BE_U_4(tptr + 4 + te_class * 4); + bw.i = GET_BE_U_4(tptr + 4 + te_class * 4); ND_PRINT("\n\t\t Bandwidth constraint CT%u: %.3f Mbps", te_class, bw.f * 8 / 1000000); @@ -404,7 +408,7 @@ ospf_te_lsa_print(netdissect_options *ndo, ND_PRINT(" != 4"); goto invalid; } - ND_PRINT(", Metric %u", EXTRACT_BE_U_4(tptr)); + ND_PRINT(", Metric %u", GET_BE_U_4(tptr)); break; case LS_OPAQUE_TE_LINK_SUBTLV_LINK_PROTECTION_TYPE: /* Protection Cap (1 octet) + Reserved ((3 octets) */ @@ -413,7 +417,7 @@ ospf_te_lsa_print(netdissect_options *ndo, goto invalid; } ND_PRINT(", %s", - bittok2str(gmpls_link_prot_values, "none", EXTRACT_U_1(tptr))); + bittok2str(gmpls_link_prot_values, "none", GET_U_1(tptr))); break; case LS_OPAQUE_TE_LINK_SUBTLV_INTF_SW_CAP_DESCR: if (subtlv_length < 36) { @@ -422,11 +426,11 @@ ospf_te_lsa_print(netdissect_options *ndo, } /* Switching Cap (1 octet) + Encoding (1) + Reserved (2) */ ND_PRINT("\n\t\tInterface Switching Capability: %s", - tok2str(gmpls_switch_cap_values, "Unknown", EXTRACT_U_1((tptr)))); + tok2str(gmpls_switch_cap_values, "Unknown", GET_U_1((tptr)))); ND_PRINT("\n\t\tLSP Encoding: %s\n\t\tMax LSP Bandwidth:", - tok2str(gmpls_encoding_values, "Unknown", EXTRACT_U_1((tptr + 1)))); + tok2str(gmpls_encoding_values, "Unknown", GET_U_1((tptr + 1)))); for (priority_level = 0; priority_level < 8; priority_level++) { - bw.i = EXTRACT_BE_U_4(tptr + 4 + (priority_level * 4)); + bw.i = GET_BE_U_4(tptr + 4 + (priority_level * 4)); ND_PRINT("\n\t\t priority level %u: %.3f Mbps", priority_level, bw.f * 8 / 1000000); @@ -438,8 +442,8 @@ ospf_te_lsa_print(netdissect_options *ndo, goto invalid; } ND_PRINT(", %s (%u)", - tok2str(lsa_opaque_te_tlv_link_type_sub_tlv_values,"unknown",EXTRACT_U_1(tptr)), - EXTRACT_U_1(tptr)); + tok2str(lsa_opaque_te_tlv_link_type_sub_tlv_values,"unknown",GET_U_1(tptr)), + GET_U_1(tptr)); break; case LS_OPAQUE_TE_LINK_SUBTLV_SHARED_RISK_GROUP: @@ -451,7 +455,7 @@ ospf_te_lsa_print(netdissect_options *ndo, if (count_srlg != 0) ND_PRINT("\n\t\t Shared risk group: "); while (count_srlg > 0) { - bw.i = EXTRACT_BE_U_4(tptr); + bw.i = GET_BE_U_4(tptr); ND_PRINT("%u", bw.i); tptr+=4; count_srlg--; @@ -471,6 +475,11 @@ ospf_te_lsa_print(netdissect_options *ndo, if (subtlv_length%4 != 0) subtlv_length+=4-(subtlv_length%4); + if (tlv_length < subtlv_length) { + ND_PRINT("\n\t Remaining TLV length %u < %u", + tlv_length + 4, subtlv_length + 4); + return -1; + } tlv_length-=subtlv_length; tptr+=subtlv_length; @@ -482,8 +491,7 @@ ospf_te_lsa_print(netdissect_options *ndo, ND_PRINT("\n\t TLV length %u < 4", tlv_length); return -1; } - ND_TCHECK_4(tptr); - ND_PRINT(", %s", ipaddr_string(ndo, tptr)); + ND_PRINT(", %s", GET_IPADDR_STRING(tptr)); break; default: @@ -496,6 +504,11 @@ ospf_te_lsa_print(netdissect_options *ndo, /* in OSPF everything has to be 32-bit aligned, including TLVs */ if (tlv_length%4 != 0) tlv_length+=4-(tlv_length%4); + if (tlv_length > ls_length) { + ND_PRINT("\n\t Bogus padded length %u > %u", tlv_length, + ls_length); + return -1; + } ls_length-=tlv_length; tptr+=tlv_length; } @@ -514,23 +527,18 @@ ospf_print_lshdr(netdissect_options *ndo, u_int ls_type; u_int ls_length; - ND_TCHECK_2(lshp->ls_length); - ls_length = EXTRACT_BE_U_2(lshp->ls_length); + ls_length = GET_BE_U_2(lshp->ls_length); if (ls_length < sizeof(struct lsa_hdr)) { - ND_PRINT("\n\t Bogus length %u < header (%lu)", ls_length, - (unsigned long)sizeof(struct lsa_hdr)); + ND_PRINT("\n\t Bogus length %u < header (%zu)", ls_length, + sizeof(struct lsa_hdr)); return(-1); } - - ND_TCHECK_4(lshp->ls_seq); /* XXX - ls_length check checked this */ ND_PRINT("\n\t Advertising Router %s, seq 0x%08x, age %us, length %u", - ipaddr_string(ndo, lshp->ls_router), - EXTRACT_BE_U_4(lshp->ls_seq), - EXTRACT_BE_U_2(lshp->ls_age), + GET_IPADDR_STRING(lshp->ls_router), + GET_BE_U_4(lshp->ls_seq), + GET_BE_U_2(lshp->ls_age), ls_length - (u_int)sizeof(struct lsa_hdr)); - - ND_TCHECK_1(lshp->ls_type); /* XXX - ls_length check checked this */ - ls_type = EXTRACT_U_1(lshp->ls_type); + ls_type = GET_U_1(lshp->ls_type); switch (ls_type) { /* the LSA header for opaque LSAs was slightly changed */ case LS_TYPE_OPAQUE_LL: @@ -542,9 +550,9 @@ ospf_print_lshdr(netdissect_options *ndo, tok2str(lsa_opaque_values, "unknown", - EXTRACT_U_1(lshp->un_lsa_id.opaque_field.opaque_type)), - EXTRACT_U_1(lshp->un_lsa_id.opaque_field.opaque_type), - EXTRACT_BE_U_3(lshp->un_lsa_id.opaque_field.opaque_id) + GET_U_1(lshp->un_lsa_id.opaque_field.opaque_type)), + GET_U_1(lshp->un_lsa_id.opaque_field.opaque_type), + GET_BE_U_3(lshp->un_lsa_id.opaque_field.opaque_id) ); break; @@ -554,16 +562,13 @@ ospf_print_lshdr(netdissect_options *ndo, ND_PRINT("\n\t %s LSA (%u), LSA-ID: %s", tok2str(lsa_values,"unknown",ls_type), ls_type, - ipaddr_string(ndo, lshp->un_lsa_id.lsa_id)); + GET_IPADDR_STRING(lshp->un_lsa_id.lsa_id)); break; } - - ND_TCHECK_1(lshp->ls_options); /* XXX - ls_length check checked this */ - ND_PRINT("\n\t Options: [%s]", bittok2str(ospf_option_values, "none", EXTRACT_U_1(lshp->ls_options))); + ND_PRINT("\n\t Options: [%s]", + bittok2str(ospf_option_values, "none", GET_U_1(lshp->ls_options))); return (ls_length); -trunc: - return (-1); } /* draft-ietf-ospf-mt-09 */ @@ -577,7 +582,7 @@ static const struct tok ospf_topology_values[] = { /* * Print all the per-topology metrics. */ -static int +static void ospf_print_tos_metrics(netdissect_options *ndo, const union un_tos *tos) { @@ -585,27 +590,23 @@ ospf_print_tos_metrics(netdissect_options *ndo, u_int toscount; u_int tos_type; - toscount = EXTRACT_U_1(tos->link.link_tos_count)+1; + toscount = GET_U_1(tos->link.link_tos_count)+1; metric_count = 0; /* * All but the first metric contain a valid topology id. */ while (toscount != 0) { - ND_TCHECK_SIZE(tos); - tos_type = EXTRACT_U_1(tos->metrics.tos_type); + tos_type = GET_U_1(tos->metrics.tos_type); ND_PRINT("\n\t\ttopology %s (%u), metric %u", tok2str(ospf_topology_values, "Unknown", metric_count ? tos_type : 0), metric_count ? tos_type : 0, - EXTRACT_BE_U_2(tos->metrics.tos_metric)); + GET_BE_U_2(tos->metrics.tos_metric)); metric_count++; tos++; toscount--; } - return 0; -trunc: - return 1; } /* @@ -623,78 +624,80 @@ ospf_print_lsa(netdissect_options *ndo, const struct aslametric *almp; const struct mcla *mcp; const uint8_t *lp; - int j, tlv_type, tlv_length, topology; - int ls_length; + u_int tlv_type, tlv_length, rla_count, topology; + int ospf_print_lshdr_ret; + u_int ls_length; const uint8_t *tptr; tptr = (const uint8_t *)lsap->lsa_un.un_unknown; /* squelch compiler warnings */ - ls_length = ospf_print_lshdr(ndo, &lsap->ls_hdr); - if (ls_length == -1) - return(NULL); + ospf_print_lshdr_ret = ospf_print_lshdr(ndo, &lsap->ls_hdr); + if (ospf_print_lshdr_ret < 0) + return(NULL); + ls_length = (u_int)ospf_print_lshdr_ret; ls_end = (const uint8_t *)lsap + ls_length; + /* + * ospf_print_lshdr() returns -1 if the length is too short, + * so we know ls_length is >= sizeof(struct lsa_hdr). + */ ls_length -= sizeof(struct lsa_hdr); - switch (EXTRACT_U_1(lsap->ls_hdr.ls_type)) { + switch (GET_U_1(lsap->ls_hdr.ls_type)) { case LS_TYPE_ROUTER: - ND_TCHECK_1(lsap->lsa_un.un_rla.rla_flags); ND_PRINT("\n\t Router LSA Options: [%s]", - bittok2str(ospf_rla_flag_values, "none", EXTRACT_U_1(lsap->lsa_un.un_rla.rla_flags))); + bittok2str(ospf_rla_flag_values, "none", GET_U_1(lsap->lsa_un.un_rla.rla_flags))); - ND_TCHECK_2(lsap->lsa_un.un_rla.rla_count); - j = EXTRACT_BE_U_2(lsap->lsa_un.un_rla.rla_count); + rla_count = GET_BE_U_2(lsap->lsa_un.un_rla.rla_count); ND_TCHECK_SIZE(lsap->lsa_un.un_rla.rla_link); rlp = lsap->lsa_un.un_rla.rla_link; - while (j--) { + for (u_int i = rla_count; i != 0; i--) { ND_TCHECK_SIZE(rlp); - switch (EXTRACT_U_1(rlp->un_tos.link.link_type)) { + switch (GET_U_1(rlp->un_tos.link.link_type)) { case RLA_TYPE_VIRTUAL: ND_PRINT("\n\t Virtual Link: Neighbor Router-ID: %s, Interface Address: %s", - ipaddr_string(ndo, rlp->link_id), - ipaddr_string(ndo, rlp->link_data)); + GET_IPADDR_STRING(rlp->link_id), + GET_IPADDR_STRING(rlp->link_data)); break; case RLA_TYPE_ROUTER: ND_PRINT("\n\t Neighbor Router-ID: %s, Interface Address: %s", - ipaddr_string(ndo, rlp->link_id), - ipaddr_string(ndo, rlp->link_data)); + GET_IPADDR_STRING(rlp->link_id), + GET_IPADDR_STRING(rlp->link_data)); break; case RLA_TYPE_TRANSIT: ND_PRINT("\n\t Neighbor Network-ID: %s, Interface Address: %s", - ipaddr_string(ndo, rlp->link_id), - ipaddr_string(ndo, rlp->link_data)); + GET_IPADDR_STRING(rlp->link_id), + GET_IPADDR_STRING(rlp->link_data)); break; case RLA_TYPE_STUB: ND_PRINT("\n\t Stub Network: %s, Mask: %s", - ipaddr_string(ndo, rlp->link_id), - ipaddr_string(ndo, rlp->link_data)); + GET_IPADDR_STRING(rlp->link_id), + GET_IPADDR_STRING(rlp->link_data)); break; default: ND_PRINT("\n\t Unknown Router Link Type (%u)", - EXTRACT_U_1(rlp->un_tos.link.link_type)); + GET_U_1(rlp->un_tos.link.link_type)); return (ls_end); } - if (ospf_print_tos_metrics(ndo, &rlp->un_tos)) - goto trunc; + ospf_print_tos_metrics(ndo, &rlp->un_tos); rlp = (const struct rlalink *)((const u_char *)(rlp + 1) + - (EXTRACT_U_1(rlp->un_tos.link.link_tos_count) * sizeof(union un_tos))); + (GET_U_1(rlp->un_tos.link.link_tos_count) * sizeof(union un_tos))); } break; case LS_TYPE_NETWORK: - ND_TCHECK_4(lsap->lsa_un.un_nla.nla_mask); ND_PRINT("\n\t Mask %s\n\t Connected Routers:", - ipaddr_string(ndo, lsap->lsa_un.un_nla.nla_mask)); + GET_IPADDR_STRING(lsap->lsa_un.un_nla.nla_mask)); ap = lsap->lsa_un.un_nla.nla_router; while ((const u_char *)ap < ls_end) { ND_TCHECK_SIZE(ap); - ND_PRINT("\n\t %s", ipaddr_string(ndo, *ap)); + ND_PRINT("\n\t %s", GET_IPADDR_STRING(*ap)); ++ap; } break; @@ -702,14 +705,13 @@ ospf_print_lsa(netdissect_options *ndo, case LS_TYPE_SUM_IP: ND_TCHECK_4(lsap->lsa_un.un_nla.nla_mask); ND_PRINT("\n\t Mask %s", - ipaddr_string(ndo, lsap->lsa_un.un_sla.sla_mask)); + GET_IPADDR_STRING(lsap->lsa_un.un_sla.sla_mask)); ND_TCHECK_SIZE(lsap->lsa_un.un_sla.sla_tosmetric); lp = (const uint8_t *)lsap->lsa_un.un_sla.sla_tosmetric; while (lp < ls_end) { uint32_t ul; - ND_TCHECK_4(lp); - ul = EXTRACT_BE_U_4(lp); + ul = GET_BE_U_4(lp); topology = (ul & SLA_MASK_TOS) >> SLA_SHIFT_TOS; ND_PRINT("\n\t\ttopology %s (%u) metric %u", tok2str(ospf_topology_values, "Unknown", topology), @@ -725,8 +727,7 @@ ospf_print_lsa(netdissect_options *ndo, while (lp < ls_end) { uint32_t ul; - ND_TCHECK_4(lp); - ul = EXTRACT_BE_U_4(lp); + ul = GET_BE_U_4(lp); topology = (ul & SLA_MASK_TOS) >> SLA_SHIFT_TOS; ND_PRINT("\n\t\ttopology %s (%u) metric %u", tok2str(ospf_topology_values, "Unknown", topology), @@ -740,15 +741,14 @@ ospf_print_lsa(netdissect_options *ndo, case LS_TYPE_NSSA: /* fall through - those LSAs share the same format */ ND_TCHECK_4(lsap->lsa_un.un_nla.nla_mask); ND_PRINT("\n\t Mask %s", - ipaddr_string(ndo, lsap->lsa_un.un_asla.asla_mask)); + GET_IPADDR_STRING(lsap->lsa_un.un_asla.asla_mask)); ND_TCHECK_SIZE(lsap->lsa_un.un_sla.sla_tosmetric); almp = lsap->lsa_un.un_asla.asla_metric; while ((const u_char *)almp < ls_end) { uint32_t ul; - ND_TCHECK_4(almp->asla_tosmetric); - ul = EXTRACT_BE_U_4(almp->asla_tosmetric); + ul = GET_BE_U_4(almp->asla_tosmetric); topology = ((ul & ASLA_MASK_TOS) >> ASLA_SHIFT_TOS); ND_PRINT("\n\t\ttopology %s (%u), type %u, metric", tok2str(ospf_topology_values, "Unknown", topology), @@ -759,13 +759,11 @@ ospf_print_lsa(netdissect_options *ndo, else ND_PRINT(" %u", (ul & ASLA_MASK_METRIC)); - ND_TCHECK_4(almp->asla_forward); - if (EXTRACT_IPV4_TO_NETWORK_ORDER(almp->asla_forward) != 0) { - ND_PRINT(", forward %s", ipaddr_string(ndo, almp->asla_forward)); + if (GET_IPV4_TO_NETWORK_ORDER(almp->asla_forward) != 0) { + ND_PRINT(", forward %s", GET_IPADDR_STRING(almp->asla_forward)); } - ND_TCHECK_4(almp->asla_tag); - if (EXTRACT_IPV4_TO_NETWORK_ORDER(almp->asla_tag) != 0) { - ND_PRINT(", tag %s", ipaddr_string(ndo, almp->asla_tag)); + if (GET_IPV4_TO_NETWORK_ORDER(almp->asla_tag) != 0) { + ND_PRINT(", tag %s", GET_IPADDR_STRING(almp->asla_tag)); } ++almp; } @@ -775,22 +773,21 @@ ospf_print_lsa(netdissect_options *ndo, /* Multicast extensions as of 23 July 1991 */ mcp = lsap->lsa_un.un_mcla; while ((const u_char *)mcp < ls_end) { - ND_TCHECK_4(mcp->mcla_vid); - switch (EXTRACT_BE_U_4(mcp->mcla_vtype)) { + switch (GET_BE_U_4(mcp->mcla_vtype)) { case MCLA_VERTEX_ROUTER: ND_PRINT("\n\t Router Router-ID %s", - ipaddr_string(ndo, mcp->mcla_vid)); + GET_IPADDR_STRING(mcp->mcla_vid)); break; case MCLA_VERTEX_NETWORK: ND_PRINT("\n\t Network Designated Router %s", - ipaddr_string(ndo, mcp->mcla_vid)); + GET_IPADDR_STRING(mcp->mcla_vid)); break; default: ND_PRINT("\n\t unknown VertexType (%u)", - EXTRACT_BE_U_4(mcp->mcla_vtype)); + GET_BE_U_4(mcp->mcla_vtype)); break; } ++mcp; @@ -801,29 +798,30 @@ ospf_print_lsa(netdissect_options *ndo, case LS_TYPE_OPAQUE_AL: case LS_TYPE_OPAQUE_DW: - switch (EXTRACT_U_1(lsap->ls_hdr.un_lsa_id.opaque_field.opaque_type)) { + switch (GET_U_1(lsap->ls_hdr.un_lsa_id.opaque_field.opaque_type)) { case LS_OPAQUE_TYPE_RI: tptr = (const uint8_t *)(lsap->lsa_un.un_ri_tlv); - while (ls_length != 0) { + u_int ls_length_remaining = ls_length; + while (ls_length_remaining != 0) { ND_TCHECK_4(tptr); - if (ls_length < 4) { - ND_PRINT("\n\t Remaining LS length %u < 4", ls_length); + if (ls_length_remaining < 4) { + ND_PRINT("\n\t Remaining LS length %u < 4", ls_length_remaining); return(ls_end); } - tlv_type = EXTRACT_BE_U_2(tptr); - tlv_length = EXTRACT_BE_U_2(tptr + 2); + tlv_type = GET_BE_U_2(tptr); + tlv_length = GET_BE_U_2(tptr + 2); tptr+=4; - ls_length-=4; + ls_length_remaining-=4; ND_PRINT("\n\t %s TLV (%u), length: %u, value: ", tok2str(lsa_opaque_ri_tlv_values,"unknown",tlv_type), tlv_type, tlv_length); - if (tlv_length > ls_length) { - ND_PRINT("\n\t Bogus length %u > %u", tlv_length, - ls_length); + if (tlv_length > ls_length_remaining) { + ND_PRINT("\n\t Bogus length %u > remaining LS length %u", tlv_length, + ls_length_remaining); return(ls_end); } ND_TCHECK_LEN(tptr, tlv_length); @@ -835,7 +833,7 @@ ospf_print_lsa(netdissect_options *ndo, return(ls_end); } ND_PRINT("Capabilities: %s", - bittok2str(lsa_opaque_ri_tlv_cap_values, "Unknown", EXTRACT_BE_U_4(tptr))); + bittok2str(lsa_opaque_ri_tlv_cap_values, "Unknown", GET_BE_U_4(tptr))); break; default: if (ndo->ndo_vflag <= 1) { @@ -846,7 +844,7 @@ ospf_print_lsa(netdissect_options *ndo, } tptr+=tlv_length; - ls_length-=tlv_length; + ls_length_remaining-=tlv_length; } break; @@ -886,7 +884,7 @@ trunc: return (NULL); } -static int +static void ospf_decode_lls(netdissect_options *ndo, const struct ospfhdr *op, u_int length) { @@ -896,54 +894,49 @@ ospf_decode_lls(netdissect_options *ndo, uint16_t lls_type, lls_len; uint32_t lls_flags; - switch (EXTRACT_U_1(op->ospf_type)) { + switch (GET_U_1(op->ospf_type)) { case OSPF_TYPE_HELLO: - if (!(EXTRACT_U_1(op->ospf_hello.hello_options) & OSPF_OPTION_L)) - return (0); + if (!(GET_U_1(op->ospf_hello.hello_options) & OSPF_OPTION_L)) + return; break; case OSPF_TYPE_DD: - if (!(EXTRACT_U_1(op->ospf_db.db_options) & OSPF_OPTION_L)) - return (0); + if (!(GET_U_1(op->ospf_db.db_options) & OSPF_OPTION_L)) + return; break; default: - return (0); + return; } /* dig deeper if LLS data is available; see RFC4813 */ - length2 = EXTRACT_BE_U_2(op->ospf_len); + length2 = GET_BE_U_2(op->ospf_len); dptr = (const u_char *)op + length2; dataend = (const u_char *)op + length; - if (EXTRACT_BE_U_2(op->ospf_authtype) == OSPF_AUTH_MD5) { - dptr = dptr + op->ospf_authdata[3]; - length2 += op->ospf_authdata[3]; + if (GET_BE_U_2(op->ospf_authtype) == OSPF_AUTH_MD5) { + dptr = dptr + GET_U_1(op->ospf_authdata + 3); + length2 += GET_U_1(op->ospf_authdata + 3); } if (length2 >= length) { ND_PRINT("\n\t[LLS truncated]"); - return (1); + return; } - ND_TCHECK_2(dptr); - ND_PRINT("\n\t LLS: checksum: 0x%04x", (u_int) EXTRACT_BE_U_2(dptr)); + ND_PRINT("\n\t LLS: checksum: 0x%04x", (u_int) GET_BE_U_2(dptr)); dptr += 2; - ND_TCHECK_2(dptr); - length2 = EXTRACT_BE_U_2(dptr); + length2 = GET_BE_U_2(dptr); ND_PRINT(", length: %u", length2); dptr += 2; - ND_TCHECK_1(dptr); while (dptr < dataend) { - ND_TCHECK_2(dptr); - lls_type = EXTRACT_BE_U_2(dptr); + lls_type = GET_BE_U_2(dptr); ND_PRINT("\n\t %s (%u)", tok2str(ospf_lls_tlv_values,"Unknown TLV",lls_type), lls_type); dptr += 2; - ND_TCHECK_2(dptr); - lls_len = EXTRACT_BE_U_2(dptr); + lls_len = GET_BE_U_2(dptr); ND_PRINT(", length: %u", lls_len); dptr += 2; switch (lls_type) { @@ -953,8 +946,7 @@ ospf_decode_lls(netdissect_options *ndo, ND_PRINT(" [should be 4]"); lls_len = 4; } - ND_TCHECK_4(dptr); - lls_flags = EXTRACT_BE_U_4(dptr); + lls_flags = GET_BE_U_4(dptr); ND_PRINT("\n\t Options: 0x%08x [%s]", lls_flags, bittok2str(ospf_lls_eo_options, "?", lls_flags)); @@ -965,17 +957,12 @@ ospf_decode_lls(netdissect_options *ndo, ND_PRINT(" [should be 20]"); lls_len = 20; } - ND_TCHECK_4(dptr); - ND_PRINT("\n\t Sequence number: 0x%08x", EXTRACT_BE_U_4(dptr)); + ND_PRINT("\n\t Sequence number: 0x%08x", GET_BE_U_4(dptr)); break; } dptr += lls_len; } - - return (0); -trunc: - return (1); } static int @@ -988,53 +975,46 @@ ospf_decode_v2(netdissect_options *ndo, const struct lsa *lsap; uint32_t lsa_count,lsa_count_max; - switch (EXTRACT_U_1(op->ospf_type)) { + switch (GET_U_1(op->ospf_type)) { case OSPF_TYPE_HELLO: - ND_TCHECK_1(op->ospf_hello.hello_options); ND_PRINT("\n\tOptions [%s]", - bittok2str(ospf_option_values,"none",EXTRACT_U_1(op->ospf_hello.hello_options))); + bittok2str(ospf_option_values,"none",GET_U_1(op->ospf_hello.hello_options))); - ND_TCHECK_4(op->ospf_hello.hello_deadint); ND_PRINT("\n\t Hello Timer %us, Dead Timer %us, Mask %s, Priority %u", - EXTRACT_BE_U_2(op->ospf_hello.hello_helloint), - EXTRACT_BE_U_4(op->ospf_hello.hello_deadint), - ipaddr_string(ndo, op->ospf_hello.hello_mask), - EXTRACT_U_1(op->ospf_hello.hello_priority)); + GET_BE_U_2(op->ospf_hello.hello_helloint), + GET_BE_U_4(op->ospf_hello.hello_deadint), + GET_IPADDR_STRING(op->ospf_hello.hello_mask), + GET_U_1(op->ospf_hello.hello_priority)); - ND_TCHECK_4(op->ospf_hello.hello_dr); - if (EXTRACT_IPV4_TO_NETWORK_ORDER(op->ospf_hello.hello_dr) != 0) + if (GET_IPV4_TO_NETWORK_ORDER(op->ospf_hello.hello_dr) != 0) ND_PRINT("\n\t Designated Router %s", - ipaddr_string(ndo, op->ospf_hello.hello_dr)); + GET_IPADDR_STRING(op->ospf_hello.hello_dr)); - ND_TCHECK_4(op->ospf_hello.hello_bdr); - if (EXTRACT_IPV4_TO_NETWORK_ORDER(op->ospf_hello.hello_bdr) != 0) + if (GET_IPV4_TO_NETWORK_ORDER(op->ospf_hello.hello_bdr) != 0) ND_PRINT(", Backup Designated Router %s", - ipaddr_string(ndo, op->ospf_hello.hello_bdr)); + GET_IPADDR_STRING(op->ospf_hello.hello_bdr)); ap = op->ospf_hello.hello_neighbor; if ((const u_char *)ap < dataend) ND_PRINT("\n\t Neighbor List:"); while ((const u_char *)ap < dataend) { ND_TCHECK_SIZE(ap); - ND_PRINT("\n\t %s", ipaddr_string(ndo, *ap)); + ND_PRINT("\n\t %s", GET_IPADDR_STRING(*ap)); ++ap; } break; /* HELLO */ case OSPF_TYPE_DD: - ND_TCHECK_1(op->ospf_db.db_options); ND_PRINT("\n\tOptions [%s]", - bittok2str(ospf_option_values, "none", EXTRACT_U_1(op->ospf_db.db_options))); - ND_TCHECK_1(op->ospf_db.db_flags); + bittok2str(ospf_option_values, "none", GET_U_1(op->ospf_db.db_options))); ND_PRINT(", DD Flags [%s]", - bittok2str(ospf_dd_flag_values, "none", EXTRACT_U_1(op->ospf_db.db_flags))); - ND_TCHECK_2(op->ospf_db.db_ifmtu); - if (EXTRACT_BE_U_2(op->ospf_db.db_ifmtu)) { - ND_PRINT(", MTU: %u", EXTRACT_BE_U_2(op->ospf_db.db_ifmtu)); + bittok2str(ospf_dd_flag_values, "none", GET_U_1(op->ospf_db.db_flags))); + if (GET_BE_U_2(op->ospf_db.db_ifmtu)) { + ND_PRINT(", MTU: %u", + GET_BE_U_2(op->ospf_db.db_ifmtu)); } - ND_TCHECK_4(op->ospf_db.db_seq); - ND_PRINT(", Sequence: 0x%08x", EXTRACT_BE_U_4(op->ospf_db.db_seq)); + ND_PRINT(", Sequence: 0x%08x", GET_BE_U_4(op->ospf_db.db_seq)); /* Print all the LS adv's */ lshp = op->ospf_db.db_lshdr; @@ -1049,23 +1029,23 @@ ospf_decode_v2(netdissect_options *ndo, ND_TCHECK_SIZE(lsrp); ND_PRINT("\n\t Advertising Router: %s, %s LSA (%u)", - ipaddr_string(ndo, lsrp->ls_router), - tok2str(lsa_values,"unknown",EXTRACT_BE_U_4(lsrp->ls_type)), - EXTRACT_BE_U_4(lsrp->ls_type)); + GET_IPADDR_STRING(lsrp->ls_router), + tok2str(lsa_values,"unknown",GET_BE_U_4(lsrp->ls_type)), + GET_BE_U_4(lsrp->ls_type)); - switch (EXTRACT_BE_U_4(lsrp->ls_type)) { + switch (GET_BE_U_4(lsrp->ls_type)) { /* the LSA header for opaque LSAs was slightly changed */ case LS_TYPE_OPAQUE_LL: case LS_TYPE_OPAQUE_AL: case LS_TYPE_OPAQUE_DW: ND_PRINT(", Opaque-Type: %s LSA (%u), Opaque-ID: %u", - tok2str(lsa_opaque_values, "unknown",EXTRACT_U_1(lsrp->un_ls_stateid.opaque_field.opaque_type)), - EXTRACT_U_1(lsrp->un_ls_stateid.opaque_field.opaque_type), - EXTRACT_BE_U_3(lsrp->un_ls_stateid.opaque_field.opaque_id)); + tok2str(lsa_opaque_values, "unknown",GET_U_1(lsrp->un_ls_stateid.opaque_field.opaque_type)), + GET_U_1(lsrp->un_ls_stateid.opaque_field.opaque_type), + GET_BE_U_3(lsrp->un_ls_stateid.opaque_field.opaque_id)); break; default: ND_PRINT(", LSA-ID: %s", - ipaddr_string(ndo, lsrp->un_ls_stateid.ls_stateid)); + GET_IPADDR_STRING(lsrp->un_ls_stateid.ls_stateid)); break; } @@ -1075,8 +1055,7 @@ ospf_decode_v2(netdissect_options *ndo, case OSPF_TYPE_LS_UPDATE: lsap = op->ospf_lsu.lsu_lsa; - ND_TCHECK_4(op->ospf_lsu.lsu_count); - lsa_count_max = EXTRACT_BE_U_4(op->ospf_lsu.lsu_count); + lsa_count_max = GET_BE_U_4(op->ospf_lsu.lsu_count); ND_PRINT(", %u LSA%s", lsa_count_max, PLURAL_SUFFIX(lsa_count_max)); for (lsa_count=1;lsa_count <= lsa_count_max;lsa_count++) { ND_PRINT("\n\t LSA #%u", lsa_count); @@ -1114,17 +1093,16 @@ ospf_print(netdissect_options *ndo, op = (const struct ospfhdr *)bp; /* XXX Before we do anything else, strip off the MD5 trailer */ - ND_TCHECK_2(op->ospf_authtype); - if (EXTRACT_BE_U_2(op->ospf_authtype) == OSPF_AUTH_MD5) { + if (GET_BE_U_2(op->ospf_authtype) == OSPF_AUTH_MD5) { length -= OSPF_AUTH_MD5_LEN; ndo->ndo_snapend -= OSPF_AUTH_MD5_LEN; } /* If the type is valid translate it, or just print the type */ /* value. If it's not valid, say so and return */ - ND_TCHECK_1(op->ospf_type); - cp = tok2str(type2str, "unknown LS-type %u", EXTRACT_U_1(op->ospf_type)); - ND_PRINT("OSPFv%u, %s, length %u", EXTRACT_U_1(op->ospf_version), cp, length); + cp = tok2str(type2str, "unknown LS-type %u", GET_U_1(op->ospf_type)); + ND_PRINT("OSPFv%u, %s, length %u", GET_U_1(op->ospf_version), cp, + length); if (*cp == 'u') return; @@ -1132,23 +1110,20 @@ ospf_print(netdissect_options *ndo, return; } - ND_TCHECK_2(op->ospf_len); - if (length != EXTRACT_BE_U_2(op->ospf_len)) { - ND_PRINT(" [len %u]", EXTRACT_BE_U_2(op->ospf_len)); + if (length != GET_BE_U_2(op->ospf_len)) { + ND_PRINT(" [len %u]", GET_BE_U_2(op->ospf_len)); } - if (length > EXTRACT_BE_U_2(op->ospf_len)) { - dataend = bp + EXTRACT_BE_U_2(op->ospf_len); + if (length > GET_BE_U_2(op->ospf_len)) { + dataend = bp + GET_BE_U_2(op->ospf_len); } else { dataend = bp + length; } - ND_TCHECK_4(op->ospf_routerid); - ND_PRINT("\n\tRouter-ID %s", ipaddr_string(ndo, op->ospf_routerid)); + ND_PRINT("\n\tRouter-ID %s", GET_IPADDR_STRING(op->ospf_routerid)); - ND_TCHECK_4(op->ospf_areaid); - if (EXTRACT_IPV4_TO_NETWORK_ORDER(op->ospf_areaid) != 0) - ND_PRINT(", Area %s", ipaddr_string(ndo, op->ospf_areaid)); + if (GET_IPV4_TO_NETWORK_ORDER(op->ospf_areaid) != 0) + ND_PRINT(", Area %s", GET_IPADDR_STRING(op->ospf_areaid)); else ND_PRINT(", Backbone Area"); @@ -1157,10 +1132,10 @@ ospf_print(netdissect_options *ndo, ND_TCHECK_LEN(op->ospf_authdata, sizeof(op->ospf_authdata)); ND_PRINT(", Authentication Type: %s (%u)", - tok2str(ospf_authtype_values, "unknown", EXTRACT_BE_U_2(op->ospf_authtype)), - EXTRACT_BE_U_2(op->ospf_authtype)); + tok2str(ospf_authtype_values, "unknown", GET_BE_U_2(op->ospf_authtype)), + GET_BE_U_2(op->ospf_authtype)); - switch (EXTRACT_BE_U_2(op->ospf_authtype)) { + switch (GET_BE_U_2(op->ospf_authtype)) { case OSPF_AUTH_NONE: break; @@ -1172,9 +1147,9 @@ ospf_print(netdissect_options *ndo, case OSPF_AUTH_MD5: ND_PRINT("\n\tKey-ID: %u, Auth-Length: %u, Crypto Sequence Number: 0x%08x", - *((op->ospf_authdata) + 2), - *((op->ospf_authdata) + 3), - EXTRACT_BE_U_4((op->ospf_authdata) + 4)); + GET_U_1(op->ospf_authdata + 2), + GET_U_1(op->ospf_authdata + 3), + GET_BE_U_4((op->ospf_authdata) + 4)); break; default: @@ -1182,24 +1157,22 @@ ospf_print(netdissect_options *ndo, } } /* Do rest according to version. */ - switch (EXTRACT_U_1(op->ospf_version)) { + switch (GET_U_1(op->ospf_version)) { case 2: /* ospf version 2 */ if (ospf_decode_v2(ndo, op, dataend)) goto trunc; - if (length > EXTRACT_BE_U_2(op->ospf_len)) { - if (ospf_decode_lls(ndo, op, length)) - goto trunc; - } + if (length > GET_BE_U_2(op->ospf_len)) + ospf_decode_lls(ndo, op, length); break; default: - ND_PRINT(" ospf [version %u]", EXTRACT_U_1(op->ospf_version)); + ND_PRINT(" ospf [version %u]", GET_U_1(op->ospf_version)); break; } /* end switch on version */ return; trunc: - nd_print_trunc(ndo); + nd_trunc_longjmp(ndo); }