/* * 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) */ #ifndef lint static const char rcsid[] _U_ = "@(#) $Header: /tcpdump/master/tcpdump/print-ospf6.c,v 1.15 2006-09-13 06:31:11 guy Exp $ (LBL)"; #endif #ifdef HAVE_CONFIG_H #include "config.h" #endif #include #include #include #include "interface.h" #include "addrtoname.h" #include "extract.h" #include "ospf.h" #define OSPF_TYPE_HELLO 1 /* Hello */ #define OSPF_TYPE_DD 2 /* Database Description */ #define OSPF_TYPE_LS_REQ 3 /* Link State Request */ #define OSPF_TYPE_LS_UPDATE 4 /* Link State Update */ #define OSPF_TYPE_LS_ACK 5 /* Link State Ack */ /* Options *_options */ #define OSPF6_OPTION_V6 0x01 /* V6 bit: A bit for peeping tom */ #define OSPF6_OPTION_E 0x02 /* E bit: External routes advertised */ #define OSPF6_OPTION_MC 0x04 /* MC bit: Multicast capable */ #define OSPF6_OPTION_N 0x08 /* N bit: For type-7 LSA */ #define OSPF6_OPTION_R 0x10 /* R bit: Router bit */ #define OSPF6_OPTION_DC 0x20 /* DC bit: Demand circuits */ /* The field is actually 24-bit (RFC5340 Section A.2). */ #define OSPF6_OPTION_AF 0x0100 /* AF bit: Multiple address families */ #define OSPF6_OPTION_L 0x0200 /* L bit: Link-local signaling (LLS) */ #define OSPF6_OPTION_AT 0x0400 /* AT bit: Authentication trailer */ /* db_flags */ #define OSPF6_DB_INIT 0x04 /* */ #define OSPF6_DB_MORE 0x02 #define OSPF6_DB_MASTER 0x01 #define OSPF6_DB_M6 0x10 /* IPv6 MTU */ /* ls_type */ #define LS_TYPE_ROUTER 1 /* router link */ #define LS_TYPE_NETWORK 2 /* network link */ #define LS_TYPE_INTER_AP 3 /* Inter-Area-Prefix */ #define LS_TYPE_INTER_AR 4 /* Inter-Area-Router */ #define LS_TYPE_ASE 5 /* ASE */ #define LS_TYPE_GROUP 6 /* Group membership */ #define LS_TYPE_NSSA 7 /* NSSA */ #define LS_TYPE_LINK 8 /* Link LSA */ #define LS_TYPE_INTRA_AP 9 /* Intra-Area-Prefix */ #define LS_TYPE_INTRA_ATE 10 /* Intra-Area-TE */ #define LS_TYPE_GRACE 11 /* Grace LSA */ #define LS_TYPE_RI 12 /* Router information */ #define LS_TYPE_INTER_ASTE 13 /* Inter-AS-TE */ #define LS_TYPE_L1VPN 14 /* L1VPN */ #define LS_TYPE_MASK 0x1fff #define LS_SCOPE_LINKLOCAL 0x0000 #define LS_SCOPE_AREA 0x2000 #define LS_SCOPE_AS 0x4000 #define LS_SCOPE_MASK 0x6000 #define LS_SCOPE_U 0x8000 /* rla_link.link_type */ #define RLA_TYPE_ROUTER 1 /* point-to-point to another router */ #define RLA_TYPE_TRANSIT 2 /* connection to transit network */ #define RLA_TYPE_VIRTUAL 4 /* virtual link */ /* rla_flags */ #define RLA_FLAG_B 0x01 #define RLA_FLAG_E 0x02 #define RLA_FLAG_V 0x04 #define RLA_FLAG_W 0x08 #define RLA_FLAG_N 0x10 /* lsa_prefix options */ #define LSA_PREFIX_OPT_NU 0x01 #define LSA_PREFIX_OPT_LA 0x02 #define LSA_PREFIX_OPT_MC 0x04 #define LSA_PREFIX_OPT_P 0x08 #define LSA_PREFIX_OPT_DN 0x10 /* sla_tosmetric breakdown */ #define SLA_MASK_TOS 0x7f000000 #define SLA_MASK_METRIC 0x00ffffff #define SLA_SHIFT_TOS 24 /* asla_metric */ #define ASLA_FLAG_FWDADDR 0x02000000 #define ASLA_FLAG_ROUTETAG 0x01000000 #define ASLA_MASK_METRIC 0x00ffffff /* RFC6506 Section 4.1 */ #define OSPF6_AT_HDRLEN 16U #define OSPF6_AUTH_TYPE_HMAC 0x0001 typedef u_int32_t rtrid_t; /* link state advertisement header */ struct lsa6_hdr { u_int16_t ls_age; u_int16_t ls_type; rtrid_t ls_stateid; rtrid_t ls_router; u_int32_t ls_seq; u_int16_t ls_chksum; u_int16_t ls_length; }; struct lsa6_prefix { u_int8_t lsa_p_len; u_int8_t lsa_p_opt; u_int16_t lsa_p_metric; u_int8_t lsa_p_prefix[4]; }; /* link state advertisement */ struct lsa6 { struct lsa6_hdr ls_hdr; /* Link state types */ union { /* Router links advertisements */ struct { union { u_int8_t flg; u_int32_t opt; } rla_flgandopt; #define rla_flags rla_flgandopt.flg #define rla_options rla_flgandopt.opt struct rlalink6 { u_int8_t link_type; u_int8_t link_zero[1]; u_int16_t link_metric; u_int32_t link_ifid; u_int32_t link_nifid; rtrid_t link_nrtid; } rla_link[1]; /* may repeat */ } un_rla; /* Network links advertisements */ struct { u_int32_t nla_options; rtrid_t nla_router[1]; /* may repeat */ } un_nla; /* Inter Area Prefix LSA */ struct { u_int32_t inter_ap_metric; struct lsa6_prefix inter_ap_prefix[1]; } un_inter_ap; /* AS external links advertisements */ struct { u_int32_t asla_metric; struct lsa6_prefix asla_prefix[1]; /* some optional fields follow */ } un_asla; #if 0 /* Summary links advertisements */ struct { struct in_addr sla_mask; u_int32_t sla_tosmetric[1]; /* may repeat */ } un_sla; /* Multicast group membership */ struct mcla { u_int32_t mcla_vtype; struct in_addr mcla_vid; } un_mcla[1]; #endif /* Type 7 LSA */ /* Link LSA */ struct llsa { union { u_int8_t pri; u_int32_t opt; } llsa_priandopt; #define llsa_priority llsa_priandopt.pri #define llsa_options llsa_priandopt.opt struct in6_addr llsa_lladdr; u_int32_t llsa_nprefix; struct lsa6_prefix llsa_prefix[1]; } un_llsa; /* Intra-Area-Prefix */ struct { u_int16_t intra_ap_nprefix; u_int16_t intra_ap_lstype; rtrid_t intra_ap_lsid; rtrid_t intra_ap_rtid; struct lsa6_prefix intra_ap_prefix[1]; } un_intra_ap; } lsa_un; }; /* * the main header */ struct ospf6hdr { u_int8_t ospf6_version; u_int8_t ospf6_type; u_int16_t ospf6_len; rtrid_t ospf6_routerid; rtrid_t ospf6_areaid; u_int16_t ospf6_chksum; u_int8_t ospf6_instanceid; u_int8_t ospf6_rsvd; union { /* Hello packet */ struct { u_int32_t hello_ifid; union { u_int8_t pri; u_int32_t opt; } hello_priandopt; #define hello_priority hello_priandopt.pri #define hello_options hello_priandopt.opt u_int16_t hello_helloint; u_int16_t hello_deadint; rtrid_t hello_dr; rtrid_t hello_bdr; rtrid_t hello_neighbor[1]; /* may repeat */ } un_hello; /* Database Description packet */ struct { u_int32_t db_options; u_int16_t db_mtu; u_int8_t db_mbz; u_int8_t db_flags; u_int32_t db_seq; struct lsa6_hdr db_lshdr[1]; /* may repeat */ } un_db; /* Link State Request */ struct lsr6 { u_int16_t ls_mbz; u_int16_t ls_type; rtrid_t ls_stateid; rtrid_t ls_router; } un_lsr[1]; /* may repeat */ /* Link State Update */ struct { u_int32_t lsu_count; struct lsa6 lsu_lsa[1]; /* may repeat */ } un_lsu; /* Link State Acknowledgement */ struct { struct lsa6_hdr lsa_lshdr[1]; /* may repeat */ } un_lsa ; } ospf6_un ; }; #define ospf6_hello ospf6_un.un_hello #define ospf6_db ospf6_un.un_db #define ospf6_lsr ospf6_un.un_lsr #define ospf6_lsu ospf6_un.un_lsu #define ospf6_lsa ospf6_un.un_lsa static const char tstr[] = " [|ospf3]"; static const struct tok ospf6_option_values[] = { { OSPF6_OPTION_V6, "V6" }, { OSPF6_OPTION_E, "External" }, { OSPF6_OPTION_MC, "Deprecated" }, { OSPF6_OPTION_N, "NSSA" }, { OSPF6_OPTION_R, "Router" }, { OSPF6_OPTION_DC, "Demand Circuit" }, { OSPF6_OPTION_AF, "AFs Support" }, { OSPF6_OPTION_L, "LLS" }, { OSPF6_OPTION_AT, "Authentication Trailer" }, { 0, NULL } }; static const struct tok ospf6_rla_flag_values[] = { { RLA_FLAG_B, "ABR" }, { RLA_FLAG_E, "External" }, { RLA_FLAG_V, "Virtual-Link Endpoint" }, { RLA_FLAG_W, "Wildcard Receiver" }, { RLA_FLAG_N, "NSSA Translator" }, { 0, NULL } }; static const struct tok ospf6_asla_flag_values[] = { { ASLA_FLAG_EXTERNAL, "External Type 2" }, { ASLA_FLAG_FWDADDR, "Forwarding" }, { ASLA_FLAG_ROUTETAG, "Tag" }, { 0, NULL } }; static const struct tok ospf6_type_values[] = { { 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 ospf6_lsa_values[] = { { LS_TYPE_ROUTER, "Router" }, { LS_TYPE_NETWORK, "Network" }, { LS_TYPE_INTER_AP, "Inter-Area Prefix" }, { LS_TYPE_INTER_AR, "Inter-Area Router" }, { LS_TYPE_ASE, "External" }, { LS_TYPE_GROUP, "Deprecated" }, { LS_TYPE_NSSA, "NSSA" }, { LS_TYPE_LINK, "Link" }, { LS_TYPE_INTRA_AP, "Intra-Area Prefix" }, { LS_TYPE_INTRA_ATE, "Intra-Area TE" }, { LS_TYPE_GRACE, "Grace" }, { LS_TYPE_RI, "Router Information" }, { LS_TYPE_INTER_ASTE, "Inter-AS-TE" }, { LS_TYPE_L1VPN, "Layer 1 VPN" }, { 0, NULL } }; static const struct tok ospf6_ls_scope_values[] = { { LS_SCOPE_LINKLOCAL, "Link Local" }, { LS_SCOPE_AREA, "Area Local" }, { LS_SCOPE_AS, "Domain Wide" }, { 0, NULL } }; static const struct tok ospf6_dd_flag_values[] = { { OSPF6_DB_INIT, "Init" }, { OSPF6_DB_MORE, "More" }, { OSPF6_DB_MASTER, "Master" }, { OSPF6_DB_M6, "IPv6 MTU" }, { 0, NULL } }; static const struct tok ospf6_lsa_prefix_option_values[] = { { LSA_PREFIX_OPT_NU, "No Unicast" }, { LSA_PREFIX_OPT_LA, "Local address" }, { LSA_PREFIX_OPT_MC, "Deprecated" }, { LSA_PREFIX_OPT_P, "Propagate" }, { LSA_PREFIX_OPT_DN, "Down" }, { 0, NULL } }; static const struct tok ospf6_auth_type_str[] = { { OSPF6_AUTH_TYPE_HMAC, "HMAC" }, { 0, NULL } }; static void ospf6_print_ls_type(register u_int ls_type, register const rtrid_t *ls_stateid) { printf("\n\t %s LSA (%d), %s Scope%s, LSA-ID %s", tok2str(ospf6_lsa_values, "Unknown", ls_type & LS_TYPE_MASK), ls_type & LS_TYPE_MASK, tok2str(ospf6_ls_scope_values, "Unknown", ls_type & LS_SCOPE_MASK), ls_type &0x8000 ? ", transitive" : "", /* U-bit */ ipaddr_string(ls_stateid)); } static int ospf6_print_lshdr(register const struct lsa6_hdr *lshp, const u_char *dataend) { if ((u_char *)(lshp + 1) > dataend) goto trunc; TCHECK(lshp->ls_type); TCHECK(lshp->ls_seq); printf("\n\t Advertising Router %s, seq 0x%08x, age %us, length %u", ipaddr_string(&lshp->ls_router), EXTRACT_32BITS(&lshp->ls_seq), EXTRACT_16BITS(&lshp->ls_age), EXTRACT_16BITS(&lshp->ls_length)-(u_int)sizeof(struct lsa6_hdr)); ospf6_print_ls_type(EXTRACT_16BITS(&lshp->ls_type), &lshp->ls_stateid); return (0); trunc: return (1); } static int ospf6_print_lsaprefix(const u_int8_t *tptr, u_int lsa_length) { const struct lsa6_prefix *lsapp = (struct lsa6_prefix *)tptr; u_int wordlen; struct in6_addr prefix; if (lsa_length < sizeof (*lsapp) - 4) goto trunc; lsa_length -= sizeof (*lsapp) - 4; TCHECK2(*lsapp, sizeof (*lsapp) - 4); wordlen = (lsapp->lsa_p_len + 31) / 32; if (wordlen * 4 > sizeof(struct in6_addr)) { printf(" bogus prefixlen /%d", lsapp->lsa_p_len); goto trunc; } if (lsa_length < wordlen * 4) goto trunc; lsa_length -= wordlen * 4; TCHECK2(lsapp->lsa_p_prefix, wordlen * 4); memset(&prefix, 0, sizeof(prefix)); memcpy(&prefix, lsapp->lsa_p_prefix, wordlen * 4); printf("\n\t\t%s/%d", ip6addr_string(&prefix), lsapp->lsa_p_len); if (lsapp->lsa_p_opt) { printf(", Options [%s]", bittok2str(ospf6_lsa_prefix_option_values, "none", lsapp->lsa_p_opt)); } printf(", metric %u", EXTRACT_16BITS(&lsapp->lsa_p_metric)); return sizeof(*lsapp) - 4 + wordlen * 4; trunc: return -1; } /* * Print a single link state advertisement. If truncated return 1, else 0. */ static int ospf6_print_lsa(register const struct lsa6 *lsap, const u_char *dataend) { register const struct rlalink6 *rlp; #if 0 register const struct tos_metric *tosp; #endif register const rtrid_t *ap; #if 0 register const struct aslametric *almp; register const struct mcla *mcp; #endif register const struct llsa *llsap; register const struct lsa6_prefix *lsapp; #if 0 register const u_int32_t *lp; #endif register u_int prefixes; register int bytelen; register u_int length, lsa_length; u_int32_t flags32; const u_int8_t *tptr; if (ospf6_print_lshdr(&lsap->ls_hdr, dataend)) return (1); TCHECK(lsap->ls_hdr.ls_length); length = EXTRACT_16BITS(&lsap->ls_hdr.ls_length); /* * The LSA length includes the length of the header; * it must have a value that's at least that length. * If it does, find the length of what follows the * header. */ if (length < sizeof(struct lsa6_hdr) || (u_char *)lsap + length > dataend) return (1); lsa_length = length - sizeof(struct lsa6_hdr); tptr = (u_int8_t *)lsap+sizeof(struct lsa6_hdr); switch (EXTRACT_16BITS(&lsap->ls_hdr.ls_type)) { case LS_TYPE_ROUTER | LS_SCOPE_AREA: if (lsa_length < sizeof (lsap->lsa_un.un_rla.rla_options)) return (1); lsa_length -= sizeof (lsap->lsa_un.un_rla.rla_options); TCHECK(lsap->lsa_un.un_rla.rla_options); printf("\n\t Options [%s]", bittok2str(ospf6_option_values, "none", EXTRACT_32BITS(&lsap->lsa_un.un_rla.rla_options))); printf(", RLA-Flags [%s]", bittok2str(ospf6_rla_flag_values, "none", lsap->lsa_un.un_rla.rla_flags)); rlp = lsap->lsa_un.un_rla.rla_link; while (lsa_length != 0) { if (lsa_length < sizeof (*rlp)) return (1); lsa_length -= sizeof (*rlp); TCHECK(*rlp); switch (rlp->link_type) { case RLA_TYPE_VIRTUAL: printf("\n\t Virtual Link: Neighbor Router-ID %s" "\n\t Neighbor Interface-ID %s, Interface %s", ipaddr_string(&rlp->link_nrtid), ipaddr_string(&rlp->link_nifid), ipaddr_string(&rlp->link_ifid)); break; case RLA_TYPE_ROUTER: printf("\n\t Neighbor Router-ID %s" "\n\t Neighbor Interface-ID %s, Interface %s", ipaddr_string(&rlp->link_nrtid), ipaddr_string(&rlp->link_nifid), ipaddr_string(&rlp->link_ifid)); break; case RLA_TYPE_TRANSIT: printf("\n\t Neighbor Network-ID %s" "\n\t Neighbor Interface-ID %s, Interface %s", ipaddr_string(&rlp->link_nrtid), ipaddr_string(&rlp->link_nifid), ipaddr_string(&rlp->link_ifid)); break; default: printf("\n\t Unknown Router Links Type 0x%02x", rlp->link_type); return (0); } printf(", metric %d", EXTRACT_16BITS(&rlp->link_metric)); rlp++; } break; case LS_TYPE_NETWORK | LS_SCOPE_AREA: if (lsa_length < sizeof (lsap->lsa_un.un_nla.nla_options)) return (1); lsa_length -= sizeof (lsap->lsa_un.un_nla.nla_options); TCHECK(lsap->lsa_un.un_nla.nla_options); printf("\n\t Options [%s]", bittok2str(ospf6_option_values, "none", EXTRACT_32BITS(&lsap->lsa_un.un_nla.nla_options))); printf("\n\t Connected Routers:"); ap = lsap->lsa_un.un_nla.nla_router; while (lsa_length != 0) { if (lsa_length < sizeof (*ap)) return (1); lsa_length -= sizeof (*ap); TCHECK(*ap); printf("\n\t\t%s", ipaddr_string(ap)); ++ap; } break; case LS_TYPE_INTER_AP | LS_SCOPE_AREA: if (lsa_length < sizeof (lsap->lsa_un.un_inter_ap.inter_ap_metric)) return (1); lsa_length -= sizeof (lsap->lsa_un.un_inter_ap.inter_ap_metric); TCHECK(lsap->lsa_un.un_inter_ap.inter_ap_metric); printf(", metric %u", EXTRACT_32BITS(&lsap->lsa_un.un_inter_ap.inter_ap_metric) & SLA_MASK_METRIC); tptr = (u_int8_t *)lsap->lsa_un.un_inter_ap.inter_ap_prefix; while (lsa_length != 0) { bytelen = ospf6_print_lsaprefix(tptr, lsa_length); if (bytelen < 0) goto trunc; lsa_length -= bytelen; tptr += bytelen; } break; case LS_TYPE_ASE | LS_SCOPE_AS: if (lsa_length < sizeof (lsap->lsa_un.un_asla.asla_metric)) return (1); lsa_length -= sizeof (lsap->lsa_un.un_asla.asla_metric); TCHECK(lsap->lsa_un.un_asla.asla_metric); flags32 = EXTRACT_32BITS(&lsap->lsa_un.un_asla.asla_metric); printf("\n\t Flags [%s]", bittok2str(ospf6_asla_flag_values, "none", flags32)); printf(" metric %u", EXTRACT_32BITS(&lsap->lsa_un.un_asla.asla_metric) & ASLA_MASK_METRIC); tptr = (u_int8_t *)lsap->lsa_un.un_asla.asla_prefix; lsapp = (struct lsa6_prefix *)tptr; bytelen = ospf6_print_lsaprefix(tptr, lsa_length); if (bytelen < 0) goto trunc; lsa_length -= bytelen; tptr += bytelen; if ((flags32 & ASLA_FLAG_FWDADDR) != 0) { struct in6_addr *fwdaddr6; fwdaddr6 = (struct in6_addr *)tptr; if (lsa_length < sizeof (*fwdaddr6)) return (1); lsa_length -= sizeof (*fwdaddr6); TCHECK(*fwdaddr6); printf(" forward %s", ip6addr_string(fwdaddr6)); tptr += sizeof(*fwdaddr6); } if ((flags32 & ASLA_FLAG_ROUTETAG) != 0) { if (lsa_length < sizeof (u_int32_t)) return (1); lsa_length -= sizeof (u_int32_t); TCHECK(*(u_int32_t *)tptr); printf(" tag %s", ipaddr_string((u_int32_t *)tptr)); tptr += sizeof(u_int32_t); } if (lsapp->lsa_p_metric) { if (lsa_length < sizeof (u_int32_t)) return (1); lsa_length -= sizeof (u_int32_t); TCHECK(*(u_int32_t *)tptr); printf(" RefLSID: %s", ipaddr_string((u_int32_t *)tptr)); tptr += sizeof(u_int32_t); } break; case LS_TYPE_LINK: /* Link LSA */ llsap = &lsap->lsa_un.un_llsa; if (lsa_length < sizeof (llsap->llsa_priandopt)) return (1); lsa_length -= sizeof (llsap->llsa_priandopt); TCHECK(llsap->llsa_priandopt); printf("\n\t Options [%s]", bittok2str(ospf6_option_values, "none", EXTRACT_32BITS(&llsap->llsa_options))); if (lsa_length < sizeof (llsap->llsa_lladdr) + sizeof (llsap->llsa_nprefix)) return (1); lsa_length -= sizeof (llsap->llsa_lladdr) + sizeof (llsap->llsa_nprefix); prefixes = EXTRACT_32BITS(&llsap->llsa_nprefix); printf("\n\t Priority %d, Link-local address %s, Prefixes %d:", llsap->llsa_priority, ip6addr_string(&llsap->llsa_lladdr), prefixes); tptr = (u_int8_t *)llsap->llsa_prefix; while (prefixes > 0) { bytelen = ospf6_print_lsaprefix(tptr, lsa_length); if (bytelen < 0) goto trunc; prefixes--; lsa_length -= bytelen; tptr += bytelen; } break; case LS_TYPE_INTRA_AP | LS_SCOPE_AREA: /* Intra-Area-Prefix LSA */ if (lsa_length < sizeof (lsap->lsa_un.un_intra_ap.intra_ap_rtid)) return (1); lsa_length -= sizeof (lsap->lsa_un.un_intra_ap.intra_ap_rtid); TCHECK(lsap->lsa_un.un_intra_ap.intra_ap_rtid); ospf6_print_ls_type( EXTRACT_16BITS(&lsap->lsa_un.un_intra_ap.intra_ap_lstype), &lsap->lsa_un.un_intra_ap.intra_ap_lsid); if (lsa_length < sizeof (lsap->lsa_un.un_intra_ap.intra_ap_nprefix)) return (1); lsa_length -= sizeof (lsap->lsa_un.un_intra_ap.intra_ap_nprefix); TCHECK(lsap->lsa_un.un_intra_ap.intra_ap_nprefix); prefixes = EXTRACT_16BITS(&lsap->lsa_un.un_intra_ap.intra_ap_nprefix); printf("\n\t Prefixes %d:", prefixes); tptr = (u_int8_t *)lsap->lsa_un.un_intra_ap.intra_ap_prefix; while (prefixes > 0) { bytelen = ospf6_print_lsaprefix(tptr, lsa_length); if (bytelen < 0) goto trunc; prefixes--; lsa_length -= bytelen; tptr += bytelen; } break; case LS_TYPE_GRACE | LS_SCOPE_LINKLOCAL: if (ospf_print_grace_lsa(tptr, lsa_length) == -1) { return 1; } break; case LS_TYPE_INTRA_ATE | LS_SCOPE_LINKLOCAL: if (ospf_print_te_lsa(tptr, lsa_length) == -1) { return 1; } break; default: if(!print_unknown_data(gndo,tptr, "\n\t ", lsa_length)) { return (1); } break; } return (0); trunc: return (1); } static int ospf6_decode_v3(register const struct ospf6hdr *op, register const u_char *dataend) { register const rtrid_t *ap; register const struct lsr6 *lsrp; register const struct lsa6_hdr *lshp; register const struct lsa6 *lsap; register int i; switch (op->ospf6_type) { case OSPF_TYPE_HELLO: printf("\n\tOptions [%s]", bittok2str(ospf6_option_values, "none", EXTRACT_32BITS(&op->ospf6_hello.hello_options))); TCHECK(op->ospf6_hello.hello_deadint); printf("\n\t Hello Timer %us, Dead Timer %us, Interface-ID %s, Priority %u", EXTRACT_16BITS(&op->ospf6_hello.hello_helloint), EXTRACT_16BITS(&op->ospf6_hello.hello_deadint), ipaddr_string(&op->ospf6_hello.hello_ifid), op->ospf6_hello.hello_priority); TCHECK(op->ospf6_hello.hello_dr); if (op->ospf6_hello.hello_dr != 0) printf("\n\t Designated Router %s", ipaddr_string(&op->ospf6_hello.hello_dr)); TCHECK(op->ospf6_hello.hello_bdr); if (op->ospf6_hello.hello_bdr != 0) printf(", Backup Designated Router %s", ipaddr_string(&op->ospf6_hello.hello_bdr)); if (vflag > 1) { printf("\n\t Neighbor List:"); ap = op->ospf6_hello.hello_neighbor; while ((u_char *)ap < dataend) { TCHECK(*ap); printf("\n\t %s", ipaddr_string(ap)); ++ap; } } break; /* HELLO */ case OSPF_TYPE_DD: TCHECK(op->ospf6_db.db_options); printf("\n\tOptions [%s]", bittok2str(ospf6_option_values, "none", EXTRACT_32BITS(&op->ospf6_db.db_options))); TCHECK(op->ospf6_db.db_flags); printf(", DD Flags [%s]", bittok2str(ospf6_dd_flag_values,"none",op->ospf6_db.db_flags)); TCHECK(op->ospf6_db.db_seq); printf(", MTU %u, DD-Sequence 0x%08x", EXTRACT_16BITS(&op->ospf6_db.db_mtu), EXTRACT_32BITS(&op->ospf6_db.db_seq)); if (vflag > 1) { /* Print all the LS adv's */ lshp = op->ospf6_db.db_lshdr; while ((u_char *)lshp < dataend) { if (ospf6_print_lshdr(lshp++, dataend)) goto trunc; } } break; case OSPF_TYPE_LS_REQ: if (vflag > 1) { lsrp = op->ospf6_lsr; while ((u_char *)lsrp < dataend) { TCHECK(*lsrp); printf("\n\t Advertising Router %s", ipaddr_string(&lsrp->ls_router)); ospf6_print_ls_type(EXTRACT_16BITS(&lsrp->ls_type), &lsrp->ls_stateid); ++lsrp; } } break; case OSPF_TYPE_LS_UPDATE: if (vflag > 1) { lsap = op->ospf6_lsu.lsu_lsa; TCHECK(op->ospf6_lsu.lsu_count); i = EXTRACT_32BITS(&op->ospf6_lsu.lsu_count); while ((u_char *)lsap < dataend && i--) { if (ospf6_print_lsa(lsap, dataend)) goto trunc; lsap = (struct lsa6 *)((u_char *)lsap + EXTRACT_16BITS(&lsap->ls_hdr.ls_length)); } } break; case OSPF_TYPE_LS_ACK: if (vflag > 1) { lshp = op->ospf6_lsa.lsa_lshdr; while ((u_char *)lshp < dataend) { if (ospf6_print_lshdr(lshp++, dataend)) goto trunc; } } break; default: break; } return (0); trunc: return (1); } /* RFC5613 Section 2.2 (w/o the TLVs) */ static int ospf6_print_lls(const u_char *cp, const u_int len) { uint16_t llsdatalen; if (len == 0) return 0; if (len < OSPF_LLS_HDRLEN) goto trunc; /* Checksum */ TCHECK2(*cp, 2); printf("\n\tLLS Checksum 0x%04x", EXTRACT_16BITS(cp)); cp += 2; /* LLS Data Length */ TCHECK2(*cp, 2); llsdatalen = EXTRACT_16BITS(cp); printf(", Data Length %u", llsdatalen); if (llsdatalen < OSPF_LLS_HDRLEN || llsdatalen > len) goto trunc; cp += 2; /* LLS TLVs */ TCHECK2(*cp, llsdatalen - OSPF_LLS_HDRLEN); /* FIXME: code in print-ospf.c can be reused to decode the TLVs */ return llsdatalen; trunc: return -1; } /* RFC6506 Section 4.1 */ static int ospf6_decode_at(const u_char *cp, const u_int len) { uint16_t authdatalen; if (len == 0) return 0; if (len < OSPF6_AT_HDRLEN) goto trunc; /* Authentication Type */ TCHECK2(*cp, 2); printf("\n\tAuthentication Type %s", tok2str(ospf6_auth_type_str, "unknown (0x%04x)", EXTRACT_16BITS(cp))); cp += 2; /* Auth Data Len */ TCHECK2(*cp, 2); authdatalen = EXTRACT_16BITS(cp); printf(", Length %u", authdatalen); if (authdatalen < OSPF6_AT_HDRLEN || authdatalen > len) goto trunc; cp += 2; /* Reserved */ TCHECK2(*cp, 2); cp += 2; /* Security Association ID */ TCHECK2(*cp, 2); printf(", SAID %u", EXTRACT_16BITS(cp)); cp += 2; /* Cryptographic Sequence Number (High-Order 32 Bits) */ TCHECK2(*cp, 4); printf(", CSN 0x%08x", EXTRACT_32BITS(cp)); cp += 4; /* Cryptographic Sequence Number (Low-Order 32 Bits) */ TCHECK2(*cp, 4); printf(":%08x", EXTRACT_32BITS(cp)); cp += 4; /* Authentication Data */ TCHECK2(*cp, authdatalen - OSPF6_AT_HDRLEN); if (vflag > 1) print_unknown_data(gndo,cp, "\n\tAuthentication Data ", authdatalen - OSPF6_AT_HDRLEN); return 0; trunc: return 1; } /* The trailing data may include LLS and/or AT data (in this specific order). * LLS data may be present only in Hello and DBDesc packets with the L-bit set. * AT data may be present in Hello and DBDesc packets with the AT-bit set or in * any other packet type, thus decode the AT data regardless of the AT-bit. */ static int ospf6_decode_v3_trailer(const struct ospf6hdr *op, const u_char *cp, const unsigned len) { int llslen = 0; u_char lls_hello = op->ospf6_type == OSPF_TYPE_HELLO && op->ospf6_hello.hello_options & OSPF6_OPTION_L; u_char lls_dd = op->ospf6_type == OSPF_TYPE_DD && op->ospf6_db.db_options & OSPF6_OPTION_L; if ((lls_hello || lls_dd) && (llslen = ospf6_print_lls(cp, len)) < 0) goto trunc; return ospf6_decode_at(cp + llslen, len - llslen); trunc: return 1; } void ospf6_print(register const u_char *bp, register u_int length) { register const struct ospf6hdr *op; register const u_char *dataend; register const char *cp; uint16_t datalen; op = (struct ospf6hdr *)bp; /* If the type is valid translate it, or just print the type */ /* value. If it's not valid, say so and return */ TCHECK(op->ospf6_type); cp = tok2str(ospf6_type_values, "unknown packet type (%u)", op->ospf6_type); printf("OSPFv%u, %s, length %d", op->ospf6_version, cp, length); if (*cp == 'u') { return; } if(!vflag) { /* non verbose - so lets bail out here */ return; } /* OSPFv3 data always comes first and optional trailing data may follow. */ TCHECK(op->ospf6_len); datalen = EXTRACT_16BITS(&op->ospf6_len); if (datalen > length) { printf(" [len %d]", datalen); return; } dataend = bp + datalen; TCHECK(op->ospf6_routerid); printf("\n\tRouter-ID %s", ipaddr_string(&op->ospf6_routerid)); TCHECK(op->ospf6_areaid); if (op->ospf6_areaid != 0) printf(", Area %s", ipaddr_string(&op->ospf6_areaid)); else printf(", Backbone Area"); TCHECK(op->ospf6_instanceid); if (op->ospf6_instanceid) printf(", Instance %u", op->ospf6_instanceid); /* Do rest according to version. */ switch (op->ospf6_version) { case 3: /* ospf version 3 */ if (ospf6_decode_v3(op, dataend) || ospf6_decode_v3_trailer(op, dataend, length - datalen)) goto trunc; break; } /* end switch on version */ return; trunc: fputs(tstr, stdout); }