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Diffstat (limited to '')
| -rw-r--r-- | print-ospf.c | 1178 |
1 files changed, 1178 insertions, 0 deletions
diff --git a/print-ospf.c b/print-ospf.c new file mode 100644 index 0000000..e6bebed --- /dev/null +++ b/print-ospf.c @@ -0,0 +1,1178 @@ +/* + * Copyright (c) 1992, 1993, 1994, 1995, 1996, 1997 + * The Regents of the University of California. All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that: (1) source code distributions + * retain the above copyright notice and this paragraph in its entirety, (2) + * distributions including binary code include the above copyright notice and + * this paragraph in its entirety in the documentation or other materials + * provided with the distribution, and (3) all advertising materials mentioning + * features or use of this software display the following acknowledgement: + * ``This product includes software developed by the University of California, + * Lawrence Berkeley Laboratory and its contributors.'' Neither the name of + * the University nor the names of its contributors may be used to endorse + * or promote products derived from this software without specific prior + * written permission. + * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR IMPLIED + * WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF + * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. + * + * OSPF support contributed by Jeffrey Honig (jch@mitchell.cit.cornell.edu) + */ + +/* \summary: Open Shortest Path First (OSPF) printer */ + +#ifdef HAVE_CONFIG_H +#include <config.h> +#endif + +#include "netdissect-stdinc.h" + +#include "netdissect.h" +#include "addrtoname.h" +#include "extract.h" +#include "gmpls.h" + +#include "ospf.h" + + +static const struct tok ospf_option_values[] = { + { 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_DC, "Demand Circuit" }, + { OSPF_OPTION_O, "Opaque" }, + { OSPF_OPTION_DN, "Up/Down" }, + { 0, NULL } +}; + +static const struct tok ospf_authtype_values[] = { + { OSPF_AUTH_NONE, "none" }, + { OSPF_AUTH_SIMPLE, "simple" }, + { OSPF_AUTH_MD5, "MD5" }, + { 0, NULL } +}; + +static const struct tok ospf_rla_flag_values[] = { + { RLA_FLAG_B, "ABR" }, + { RLA_FLAG_E, "ASBR" }, + { RLA_FLAG_V, "Virtual" }, + { RLA_FLAG_W, "Wildcard" }, + { RLA_FLAG_NT, "Nt" }, + { RLA_FLAG_H, "Host" }, + { 0, NULL } +}; + +static const struct tok type2str[] = { + { OSPF_TYPE_HELLO, "Hello" }, + { OSPF_TYPE_DD, "Database Description" }, + { OSPF_TYPE_LS_REQ, "LS-Request" }, + { OSPF_TYPE_LS_UPDATE, "LS-Update" }, + { OSPF_TYPE_LS_ACK, "LS-Ack" }, + { 0, NULL } +}; + +static const struct tok lsa_values[] = { + { LS_TYPE_ROUTER, "Router" }, + { LS_TYPE_NETWORK, "Network" }, + { LS_TYPE_SUM_IP, "Summary" }, + { LS_TYPE_SUM_ABR, "ASBR Summary" }, + { LS_TYPE_ASE, "External" }, + { LS_TYPE_GROUP, "Multicast Group" }, + { LS_TYPE_NSSA, "NSSA" }, + { LS_TYPE_OPAQUE_LL, "Link Local Opaque" }, + { LS_TYPE_OPAQUE_AL, "Area Local Opaque" }, + { LS_TYPE_OPAQUE_DW, "Domain Wide Opaque" }, + { 0, NULL } +}; + +static const struct tok ospf_dd_flag_values[] = { + { OSPF_DB_INIT, "Init" }, + { OSPF_DB_MORE, "More" }, + { OSPF_DB_MASTER, "Master" }, + { OSPF_DB_RESYNC, "OOBResync" }, + { 0, NULL } +}; + +static const struct tok lsa_opaque_values[] = { + { LS_OPAQUE_TYPE_TE, "Traffic Engineering" }, + { LS_OPAQUE_TYPE_GRACE, "Graceful restart" }, + { LS_OPAQUE_TYPE_RI, "Router Information" }, + { 0, NULL } +}; + +static const struct tok lsa_opaque_te_tlv_values[] = { + { LS_OPAQUE_TE_TLV_ROUTER, "Router Address" }, + { LS_OPAQUE_TE_TLV_LINK, "Link" }, + { 0, NULL } +}; + +static const struct tok lsa_opaque_te_link_tlv_subtlv_values[] = { + { LS_OPAQUE_TE_LINK_SUBTLV_LINK_TYPE, "Link Type" }, + { LS_OPAQUE_TE_LINK_SUBTLV_LINK_ID, "Link ID" }, + { LS_OPAQUE_TE_LINK_SUBTLV_LOCAL_IP, "Local Interface IP address" }, + { LS_OPAQUE_TE_LINK_SUBTLV_REMOTE_IP, "Remote Interface IP address" }, + { LS_OPAQUE_TE_LINK_SUBTLV_TE_METRIC, "Traffic Engineering Metric" }, + { LS_OPAQUE_TE_LINK_SUBTLV_MAX_BW, "Maximum Bandwidth" }, + { LS_OPAQUE_TE_LINK_SUBTLV_MAX_RES_BW, "Maximum Reservable Bandwidth" }, + { LS_OPAQUE_TE_LINK_SUBTLV_UNRES_BW, "Unreserved Bandwidth" }, + { LS_OPAQUE_TE_LINK_SUBTLV_ADMIN_GROUP, "Administrative Group" }, + { LS_OPAQUE_TE_LINK_SUBTLV_LINK_LOCAL_REMOTE_ID, "Link Local/Remote Identifier" }, + { LS_OPAQUE_TE_LINK_SUBTLV_LINK_PROTECTION_TYPE, "Link Protection Type" }, + { LS_OPAQUE_TE_LINK_SUBTLV_INTF_SW_CAP_DESCR, "Interface Switching Capability" }, + { LS_OPAQUE_TE_LINK_SUBTLV_SHARED_RISK_GROUP, "Shared Risk Link Group" }, + { LS_OPAQUE_TE_LINK_SUBTLV_BW_CONSTRAINTS, "Bandwidth Constraints" }, + { 0, NULL } +}; + +static const struct tok lsa_opaque_grace_tlv_values[] = { + { LS_OPAQUE_GRACE_TLV_PERIOD, "Grace Period" }, + { LS_OPAQUE_GRACE_TLV_REASON, "Graceful restart Reason" }, + { LS_OPAQUE_GRACE_TLV_INT_ADDRESS, "IPv4 interface address" }, + { 0, NULL } +}; + +static const struct tok lsa_opaque_grace_tlv_reason_values[] = { + { LS_OPAQUE_GRACE_TLV_REASON_UNKNOWN, "Unknown" }, + { LS_OPAQUE_GRACE_TLV_REASON_SW_RESTART, "Software Restart" }, + { LS_OPAQUE_GRACE_TLV_REASON_SW_UPGRADE, "Software Reload/Upgrade" }, + { LS_OPAQUE_GRACE_TLV_REASON_CP_SWITCH, "Control Processor Switch" }, + { 0, NULL } +}; + +static const struct tok lsa_opaque_te_tlv_link_type_sub_tlv_values[] = { + { LS_OPAQUE_TE_LINK_SUBTLV_LINK_TYPE_PTP, "Point-to-point" }, + { LS_OPAQUE_TE_LINK_SUBTLV_LINK_TYPE_MA, "Multi-Access" }, + { 0, NULL } +}; + +static const struct tok lsa_opaque_ri_tlv_values[] = { + { LS_OPAQUE_RI_TLV_CAP, "Router Capabilities" }, + { 0, NULL } +}; + +static const struct tok lsa_opaque_ri_tlv_cap_values[] = { + { 1, "Reserved" }, + { 2, "Reserved" }, + { 4, "Reserved" }, + { 8, "Reserved" }, + { 16, "graceful restart capable" }, + { 32, "graceful restart helper" }, + { 64, "Stub router support" }, + { 128, "Traffic engineering" }, + { 256, "p2p over LAN" }, + { 512, "path computation server" }, + { 0, NULL } +}; + +static const struct tok ospf_lls_tlv_values[] = { + { OSPF_LLS_EO, "Extended Options" }, + { OSPF_LLS_MD5, "MD5 Authentication" }, + { 0, NULL } +}; + +static const struct tok ospf_lls_eo_options[] = { + { OSPF_LLS_EO_LR, "LSDB resync" }, + { OSPF_LLS_EO_RS, "Restart" }, + { 0, NULL } +}; + +int +ospf_grace_lsa_print(netdissect_options *ndo, + const u_char *tptr, u_int ls_length) +{ + u_int tlv_type, tlv_length; + + + while (ls_length > 0) { + ND_TCHECK_4(tptr); + if (ls_length < 4) { + ND_PRINT("\n\t Remaining LS length %u < 4", ls_length); + return -1; + } + tlv_type = GET_BE_U_2(tptr); + tlv_length = GET_BE_U_2(tptr + 2); + tptr+=4; + ls_length-=4; + + ND_PRINT("\n\t %s TLV (%u), length %u, value: ", + tok2str(lsa_opaque_grace_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); + return -1; + } + + /* Infinite loop protection. */ + if (tlv_type == 0 || tlv_length ==0) { + return -1; + } + + ND_TCHECK_LEN(tptr, tlv_length); + switch(tlv_type) { + + case LS_OPAQUE_GRACE_TLV_PERIOD: + if (tlv_length != 4) { + ND_PRINT("\n\t Bogus length %u != 4", tlv_length); + return -1; + } + ND_PRINT("%us", GET_BE_U_4(tptr)); + break; + + case LS_OPAQUE_GRACE_TLV_REASON: + if (tlv_length != 1) { + ND_PRINT("\n\t Bogus length %u != 1", tlv_length); + return -1; + } + ND_PRINT("%s (%u)", + tok2str(lsa_opaque_grace_tlv_reason_values, "Unknown", GET_U_1(tptr)), + GET_U_1(tptr)); + break; + + case LS_OPAQUE_GRACE_TLV_INT_ADDRESS: + if (tlv_length != 4) { + ND_PRINT("\n\t Bogus length %u != 4", tlv_length); + return -1; + } + ND_PRINT("%s", GET_IPADDR_STRING(tptr)); + break; + + default: + if (ndo->ndo_vflag <= 1) { + if (!print_unknown_data(ndo, tptr, "\n\t ", tlv_length)) + return -1; + } + break; + + } + /* in OSPF everything has to be 32-bit aligned, including TLVs */ + if (tlv_length%4 != 0) + tlv_length+=4-(tlv_length%4); + ls_length-=tlv_length; + tptr+=tlv_length; + } + + return 0; +trunc: + return -1; +} + +int +ospf_te_lsa_print(netdissect_options *ndo, + const u_char *tptr, u_int ls_length) +{ + u_int tlv_type, tlv_length, subtlv_type, subtlv_length; + u_int priority_level, te_class, count_srlg; + union { /* int to float conversion buffer for several subTLVs */ + float f; + uint32_t i; + } bw; + + while (ls_length != 0) { + ND_TCHECK_4(tptr); + if (ls_length < 4) { + ND_PRINT("\n\t Remaining LS length %u < 4", ls_length); + return -1; + } + tlv_type = GET_BE_U_2(tptr); + tlv_length = GET_BE_U_2(tptr + 2); + tptr+=4; + ls_length-=4; + + ND_PRINT("\n\t %s TLV (%u), length: %u", + tok2str(lsa_opaque_te_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); + return -1; + } + + /* Infinite loop protection. */ + if (tlv_type == 0 || tlv_length ==0) { + return -1; + } + + switch(tlv_type) { + case LS_OPAQUE_TE_TLV_LINK: + while (tlv_length != 0) { + if (tlv_length < 4) { + ND_PRINT("\n\t Remaining TLV length %u < 4", + tlv_length); + return -1; + } + subtlv_type = GET_BE_U_2(tptr); + subtlv_length = GET_BE_U_2(tptr + 2); + tptr+=4; + tlv_length-=4; + + /* Infinite loop protection */ + if (subtlv_type == 0 || subtlv_length == 0) + goto invalid; + + ND_PRINT("\n\t %s subTLV (%u), length: %u", + tok2str(lsa_opaque_te_link_tlv_subtlv_values,"unknown",subtlv_type), + 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: + if (subtlv_length != 4) { + ND_PRINT(" != 4"); + goto invalid; + } + 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: + if (subtlv_length != 4 && subtlv_length != 8) { + ND_PRINT(" != 4 && != 8"); + goto invalid; + } + ND_PRINT(", %s (0x%08x)", + GET_IPADDR_STRING(tptr), + GET_BE_U_4(tptr)); + if (subtlv_length == 8) /* rfc4203 */ + ND_PRINT(", %s (0x%08x)", + 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: + if (subtlv_length != 4) { + ND_PRINT(" != 4"); + goto invalid; + } + 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: + if (subtlv_length != 4) { + ND_PRINT(" != 4"); + goto invalid; + } + bw.i = GET_BE_U_4(tptr); + ND_PRINT(", %.3f Mbps", bw.f * 8 / 1000000); + break; + case LS_OPAQUE_TE_LINK_SUBTLV_UNRES_BW: + if (subtlv_length != 32) { + ND_PRINT(" != 32"); + goto invalid; + } + for (te_class = 0; te_class < 8; te_class++) { + 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); + } + break; + case LS_OPAQUE_TE_LINK_SUBTLV_BW_CONSTRAINTS: + if (subtlv_length < 4) { + ND_PRINT(" < 4"); + goto invalid; + } + /* BC Model Id (1 octet) + Reserved (3 octets) */ + ND_PRINT("\n\t\tBandwidth Constraints Model ID: %s (%u)", + 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; + } + if (subtlv_length > 36) { + ND_PRINT("\n\t\tlength %u > 36", subtlv_length); + goto invalid; + } + /* decode BCs until the subTLV ends */ + for (te_class = 0; te_class < (subtlv_length-4)/4; te_class++) { + 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); + } + break; + case LS_OPAQUE_TE_LINK_SUBTLV_TE_METRIC: + if (subtlv_length != 4) { + ND_PRINT(" != 4"); + goto invalid; + } + 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) */ + if (subtlv_length != 4) { + ND_PRINT(" != 4"); + goto invalid; + } + ND_PRINT(", %s", + 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) { + ND_PRINT(" < 36"); + goto invalid; + } + /* Switching Cap (1 octet) + Encoding (1) + Reserved (2) */ + ND_PRINT("\n\t\tInterface Switching Capability: %s", + 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", GET_U_1((tptr + 1)))); + for (priority_level = 0; priority_level < 8; priority_level++) { + 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); + } + break; + case LS_OPAQUE_TE_LINK_SUBTLV_LINK_TYPE: + if (subtlv_length != 1) { + ND_PRINT(" != 1"); + goto invalid; + } + ND_PRINT(", %s (%u)", + 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: + if (subtlv_length % 4 != 0) { + ND_PRINT(" != N x 4"); + goto invalid; + } + count_srlg = subtlv_length / 4; + if (count_srlg != 0) + ND_PRINT("\n\t\t Shared risk group: "); + while (count_srlg > 0) { + bw.i = GET_BE_U_4(tptr); + ND_PRINT("%u", bw.i); + tptr+=4; + count_srlg--; + if (count_srlg > 0) + ND_PRINT(", "); + } + break; + + default: + if (ndo->ndo_vflag <= 1) { + if (!print_unknown_data(ndo, tptr, "\n\t\t", subtlv_length)) + return -1; + } + break; + } + /* in OSPF everything has to be 32-bit aligned, including subTLVs */ + 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; + + } + break; + + case LS_OPAQUE_TE_TLV_ROUTER: + if (tlv_length < 4) { + ND_PRINT("\n\t TLV length %u < 4", tlv_length); + return -1; + } + ND_PRINT(", %s", GET_IPADDR_STRING(tptr)); + break; + + default: + if (ndo->ndo_vflag <= 1) { + if (!print_unknown_data(ndo, tptr, "\n\t ", tlv_length)) + return -1; + } + break; + } + /* 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; + } + return 0; +trunc: + return -1; +invalid: + nd_print_invalid(ndo); + return -1; +} + +static int +ospf_print_lshdr(netdissect_options *ndo, + const struct lsa_hdr *lshp) +{ + u_int ls_type; + u_int 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 (%zu)", ls_length, + sizeof(struct lsa_hdr)); + return(-1); + } + ND_PRINT("\n\t Advertising Router %s, seq 0x%08x, age %us, length %zu", + GET_IPADDR_STRING(lshp->ls_router), + GET_BE_U_4(lshp->ls_seq), + GET_BE_U_2(lshp->ls_age), + ls_length - sizeof(struct lsa_hdr)); + 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: + case LS_TYPE_OPAQUE_AL: + case LS_TYPE_OPAQUE_DW: + ND_PRINT("\n\t %s LSA (%u), Opaque-Type %s LSA (%u), Opaque-ID %u", + tok2str(lsa_values,"unknown",ls_type), + ls_type, + + tok2str(lsa_opaque_values, + "unknown", + 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; + + /* all other LSA types use regular style LSA headers */ + default: + ND_PRINT("\n\t %s LSA (%u), LSA-ID: %s", + tok2str(lsa_values,"unknown",ls_type), + ls_type, + GET_IPADDR_STRING(lshp->un_lsa_id.lsa_id)); + break; + } + ND_PRINT("\n\t Options: [%s]", + bittok2str(ospf_option_values, "none", GET_U_1(lshp->ls_options))); + + return (ls_length); +} + +/* draft-ietf-ospf-mt-09 */ +static const struct tok ospf_topology_values[] = { + { 0, "default" }, + { 1, "multicast" }, + { 2, "management" }, + { 0, NULL } +}; + +/* + * Print all the per-topology metrics. + */ +static void +ospf_print_tos_metrics(netdissect_options *ndo, + const union un_tos *tos) +{ + u_int metric_count; + u_int toscount; + u_int tos_type; + + 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) { + 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, + GET_BE_U_2(tos->metrics.tos_metric)); + metric_count++; + tos++; + toscount--; + } +} + +/* + * Print a single link state advertisement. If truncated or if LSA length + * field is less than the length of the LSA header, return NULl, else + * return pointer to data past end of LSA. + */ +static const uint8_t * +ospf_print_lsa(netdissect_options *ndo, + const struct lsa *lsap) +{ + const uint8_t *ls_end; + const struct rlalink *rlp; + const nd_ipv4 *ap; + const struct aslametric *almp; + const struct mcla *mcp; + const uint8_t *lp; + 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 */ + 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 (GET_U_1(lsap->ls_hdr.ls_type)) { + + case LS_TYPE_ROUTER: + ND_PRINT("\n\t Router LSA Options: [%s]", + bittok2str(ospf_rla_flag_values, "none", GET_U_1(lsap->lsa_un.un_rla.rla_flags))); + + 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; + for (u_int i = rla_count; i != 0; i--) { + ND_TCHECK_SIZE(rlp); + 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", + 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", + 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", + 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", + GET_IPADDR_STRING(rlp->link_id), + GET_IPADDR_STRING(rlp->link_data)); + break; + + default: + ND_PRINT("\n\t Unknown Router Link Type (%u)", + GET_U_1(rlp->un_tos.link.link_type)); + return (ls_end); + } + + ospf_print_tos_metrics(ndo, &rlp->un_tos); + + rlp = (const struct rlalink *)((const u_char *)(rlp + 1) + + (GET_U_1(rlp->un_tos.link.link_tos_count) * sizeof(union un_tos))); + } + break; + + case LS_TYPE_NETWORK: + ND_PRINT("\n\t Mask %s\n\t Connected Routers:", + 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_PRINT("\n\t %s", GET_IPADDR_STRING(ap)); + ++ap; + } + break; + + case LS_TYPE_SUM_IP: + ND_TCHECK_4(lsap->lsa_un.un_nla.nla_mask); + ND_PRINT("\n\t Mask %s", + 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; + + 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), + topology, + ul & SLA_MASK_METRIC); + lp += 4; + } + break; + + case LS_TYPE_SUM_ABR: + 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; + + 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), + topology, + ul & SLA_MASK_METRIC); + lp += 4; + } + break; + + case LS_TYPE_ASE: + 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", + 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; + + 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), + topology, + (ul & ASLA_FLAG_EXTERNAL) ? 2 : 1); + if ((ul & ASLA_MASK_METRIC) == 0xffffff) + ND_PRINT(" infinite"); + else + ND_PRINT(" %u", (ul & ASLA_MASK_METRIC)); + + if (GET_IPV4_TO_NETWORK_ORDER(almp->asla_forward) != 0) { + ND_PRINT(", forward %s", GET_IPADDR_STRING(almp->asla_forward)); + } + if (GET_IPV4_TO_NETWORK_ORDER(almp->asla_tag) != 0) { + ND_PRINT(", tag %s", GET_IPADDR_STRING(almp->asla_tag)); + } + ++almp; + } + break; + + case LS_TYPE_GROUP: + /* Multicast extensions as of 23 July 1991 */ + mcp = lsap->lsa_un.un_mcla; + while ((const u_char *)mcp < ls_end) { + switch (GET_BE_U_4(mcp->mcla_vtype)) { + + case MCLA_VERTEX_ROUTER: + ND_PRINT("\n\t Router Router-ID %s", + GET_IPADDR_STRING(mcp->mcla_vid)); + break; + + case MCLA_VERTEX_NETWORK: + ND_PRINT("\n\t Network Designated Router %s", + GET_IPADDR_STRING(mcp->mcla_vid)); + break; + + default: + ND_PRINT("\n\t unknown VertexType (%u)", + GET_BE_U_4(mcp->mcla_vtype)); + break; + } + ++mcp; + } + break; + + case LS_TYPE_OPAQUE_LL: /* fall through */ + case LS_TYPE_OPAQUE_AL: + case LS_TYPE_OPAQUE_DW: + + 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); + + u_int ls_length_remaining = ls_length; + while (ls_length_remaining != 0) { + ND_TCHECK_4(tptr); + if (ls_length_remaining < 4) { + ND_PRINT("\n\t Remaining LS length %u < 4", ls_length_remaining); + return(ls_end); + } + tlv_type = GET_BE_U_2(tptr); + tlv_length = GET_BE_U_2(tptr + 2); + tptr+=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_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); + switch(tlv_type) { + + case LS_OPAQUE_RI_TLV_CAP: + if (tlv_length != 4) { + ND_PRINT("\n\t Bogus length %u != 4", tlv_length); + return(ls_end); + } + ND_PRINT("Capabilities: %s", + bittok2str(lsa_opaque_ri_tlv_cap_values, "Unknown", GET_BE_U_4(tptr))); + break; + default: + if (ndo->ndo_vflag <= 1) { + if (!print_unknown_data(ndo, tptr, "\n\t ", tlv_length)) + return(ls_end); + } + break; + + } + tptr+=tlv_length; + ls_length_remaining-=tlv_length; + } + break; + + case LS_OPAQUE_TYPE_GRACE: + if (ospf_grace_lsa_print(ndo, (const u_char *)(lsap->lsa_un.un_grace_tlv), + ls_length) == -1) { + return(ls_end); + } + break; + + case LS_OPAQUE_TYPE_TE: + if (ospf_te_lsa_print(ndo, (const u_char *)(lsap->lsa_un.un_te_lsa_tlv), + ls_length) == -1) { + return(ls_end); + } + break; + + default: + if (ndo->ndo_vflag <= 1) { + if (!print_unknown_data(ndo, (const uint8_t *)lsap->lsa_un.un_unknown, + "\n\t ", ls_length)) + return(ls_end); + } + break; + } + } + + /* do we want to see an additionally hexdump ? */ + if (ndo->ndo_vflag> 1) + if (!print_unknown_data(ndo, (const uint8_t *)lsap->lsa_un.un_unknown, + "\n\t ", ls_length)) { + return(ls_end); + } + + return (ls_end); +trunc: + return (NULL); +} + +static void +ospf_decode_lls(netdissect_options *ndo, + const struct ospfhdr *op, u_int length) +{ + const u_char *dptr; + const u_char *dataend; + u_int length2; + uint16_t lls_type, lls_len; + uint32_t lls_flags; + + switch (GET_U_1(op->ospf_type)) { + + case OSPF_TYPE_HELLO: + if (!(GET_U_1(op->ospf_hello.hello_options) & OSPF_OPTION_L)) + return; + break; + + case OSPF_TYPE_DD: + if (!(GET_U_1(op->ospf_db.db_options) & OSPF_OPTION_L)) + return; + break; + + default: + return; + } + + /* dig deeper if LLS data is available; see RFC4813 */ + length2 = GET_BE_U_2(op->ospf_len); + dptr = (const u_char *)op + length2; + dataend = (const u_char *)op + length; + + 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; + } + ND_PRINT("\n\t LLS: checksum: 0x%04x", (u_int) GET_BE_U_2(dptr)); + + dptr += 2; + length2 = GET_BE_U_2(dptr); + ND_PRINT(", length: %u", length2); + + dptr += 2; + while (dptr < dataend) { + 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; + lls_len = GET_BE_U_2(dptr); + ND_PRINT(", length: %u", lls_len); + dptr += 2; + switch (lls_type) { + + case OSPF_LLS_EO: + if (lls_len != 4) { + ND_PRINT(" [should be 4]"); + lls_len = 4; + } + lls_flags = GET_BE_U_4(dptr); + ND_PRINT("\n\t Options: 0x%08x [%s]", lls_flags, + bittok2str(ospf_lls_eo_options, "?", lls_flags)); + + break; + + case OSPF_LLS_MD5: + if (lls_len != 20) { + ND_PRINT(" [should be 20]"); + lls_len = 20; + } + ND_PRINT("\n\t Sequence number: 0x%08x", GET_BE_U_4(dptr)); + break; + } + + dptr += lls_len; + } +} + +static int +ospf_decode_v2(netdissect_options *ndo, + const struct ospfhdr *op, const u_char *dataend) +{ + const nd_ipv4 *ap; + const struct lsr *lsrp; + const struct lsa_hdr *lshp; + const struct lsa *lsap; + uint32_t lsa_count,lsa_count_max; + + switch (GET_U_1(op->ospf_type)) { + + case OSPF_TYPE_HELLO: + ND_PRINT("\n\tOptions [%s]", + bittok2str(ospf_option_values,"none",GET_U_1(op->ospf_hello.hello_options))); + + ND_PRINT("\n\t Hello Timer %us, Dead Timer %us, Mask %s, Priority %u", + 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)); + + if (GET_IPV4_TO_NETWORK_ORDER(op->ospf_hello.hello_dr) != 0) + ND_PRINT("\n\t Designated Router %s", + GET_IPADDR_STRING(op->ospf_hello.hello_dr)); + + if (GET_IPV4_TO_NETWORK_ORDER(op->ospf_hello.hello_bdr) != 0) + ND_PRINT(", Backup Designated Router %s", + 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_PRINT("\n\t %s", GET_IPADDR_STRING(ap)); + ++ap; + } + break; /* HELLO */ + + case OSPF_TYPE_DD: + ND_PRINT("\n\tOptions [%s]", + bittok2str(ospf_option_values, "none", GET_U_1(op->ospf_db.db_options))); + ND_PRINT(", DD Flags [%s]", + 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_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; + while (((const u_char *)lshp < dataend) && ospf_print_lshdr(ndo, lshp) != -1) { + ++lshp; + } + break; + + case OSPF_TYPE_LS_REQ: + lsrp = op->ospf_lsr; + while ((const u_char *)lsrp < dataend) { + ND_TCHECK_SIZE(lsrp); + + ND_PRINT("\n\t Advertising Router: %s, %s LSA (%u)", + 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 (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",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", + GET_IPADDR_STRING(lsrp->un_ls_stateid.ls_stateid)); + break; + } + + ++lsrp; + } + break; + + case OSPF_TYPE_LS_UPDATE: + lsap = op->ospf_lsu.lsu_lsa; + 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); + lsap = (const struct lsa *)ospf_print_lsa(ndo, lsap); + if (lsap == NULL) + goto trunc; + } + break; + + case OSPF_TYPE_LS_ACK: + lshp = op->ospf_lsa.lsa_lshdr; + while (ospf_print_lshdr(ndo, lshp) != -1) { + ++lshp; + } + break; + + default: + break; + } + return (0); +trunc: + return (1); +} + +void +ospf_print(netdissect_options *ndo, + const u_char *bp, u_int length, + const u_char *bp2 _U_) +{ + const struct ospfhdr *op; + const u_char *dataend; + const char *cp; + + ndo->ndo_protocol = "ospf2"; + op = (const struct ospfhdr *)bp; + + /* XXX Before we do anything else, strip off the MD5 trailer */ + 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 */ + 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; + + if (!ndo->ndo_vflag) { /* non verbose - so lets bail out here */ + return; + } + + if (length != GET_BE_U_2(op->ospf_len)) { + ND_PRINT(" [len %u]", GET_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_PRINT("\n\tRouter-ID %s", GET_IPADDR_STRING(op->ospf_routerid)); + + 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"); + + if (ndo->ndo_vflag) { + /* Print authentication data (should we really do this?) */ + ND_TCHECK_LEN(op->ospf_authdata, sizeof(op->ospf_authdata)); + + ND_PRINT(", Authentication Type: %s (%u)", + tok2str(ospf_authtype_values, "unknown", GET_BE_U_2(op->ospf_authtype)), + GET_BE_U_2(op->ospf_authtype)); + + switch (GET_BE_U_2(op->ospf_authtype)) { + + case OSPF_AUTH_NONE: + break; + + case OSPF_AUTH_SIMPLE: + ND_PRINT("\n\tSimple text password: "); + nd_printjnp(ndo, op->ospf_authdata, OSPF_AUTH_SIMPLE_LEN); + break; + + case OSPF_AUTH_MD5: + ND_PRINT("\n\tKey-ID: %u, Auth-Length: %u, Crypto Sequence Number: 0x%08x", + GET_U_1(op->ospf_authdata + 2), + GET_U_1(op->ospf_authdata + 3), + GET_BE_U_4((op->ospf_authdata) + 4)); + break; + + default: + return; + } + } + /* Do rest according to version. */ + switch (GET_U_1(op->ospf_version)) { + + case 2: + /* ospf version 2 */ + if (ospf_decode_v2(ndo, op, dataend)) + goto trunc; + if (length > GET_BE_U_2(op->ospf_len)) + ospf_decode_lls(ndo, op, length); + break; + + default: + ND_PRINT(" ospf [version %u]", GET_U_1(op->ospf_version)); + break; + } /* end switch on version */ + + return; +trunc: + nd_trunc_longjmp(ndo); +} |