#include #ifdef __rtems__ #include #include "rtems-bsd-tcpdump-namespace.h" #endif /* __rtems__ */ /* * 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: IPv6 Open Shortest Path First (OSPFv3) printer */ #ifdef HAVE_CONFIG_H #include "config.h" #endif #include #include #include "netdissect.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 uint32_t rtrid_t; /* link state advertisement header */ struct lsa6_hdr { uint16_t ls_age; uint16_t ls_type; rtrid_t ls_stateid; rtrid_t ls_router; uint32_t ls_seq; uint16_t ls_chksum; uint16_t ls_length; }; /* Length of an IPv6 address, in bytes. */ #define IPV6_ADDR_LEN_BYTES (128/8) struct lsa6_prefix { uint8_t lsa_p_len; uint8_t lsa_p_opt; uint16_t lsa_p_metric; uint8_t lsa_p_prefix[IPV6_ADDR_LEN_BYTES]; /* maximum length */ }; /* link state advertisement */ struct lsa6 { struct lsa6_hdr ls_hdr; /* Link state types */ union { /* Router links advertisements */ struct { union { uint8_t flg; uint32_t opt; } rla_flgandopt; #define rla_flags rla_flgandopt.flg #define rla_options rla_flgandopt.opt struct rlalink6 { uint8_t link_type; uint8_t link_zero[1]; uint16_t link_metric; uint32_t link_ifid; uint32_t link_nifid; rtrid_t link_nrtid; } rla_link[1]; /* may repeat */ } un_rla; /* Network links advertisements */ struct { uint32_t nla_options; rtrid_t nla_router[1]; /* may repeat */ } un_nla; /* Inter Area Prefix LSA */ struct { uint32_t inter_ap_metric; struct lsa6_prefix inter_ap_prefix[1]; } un_inter_ap; /* AS external links advertisements */ struct { uint32_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; uint32_t sla_tosmetric[1]; /* may repeat */ } un_sla; /* Multicast group membership */ struct mcla { uint32_t mcla_vtype; struct in_addr mcla_vid; } un_mcla[1]; #endif /* Type 7 LSA */ /* Link LSA */ struct llsa { union { uint8_t pri; uint32_t opt; } llsa_priandopt; #define llsa_priority llsa_priandopt.pri #define llsa_options llsa_priandopt.opt struct in6_addr llsa_lladdr; uint32_t llsa_nprefix; struct lsa6_prefix llsa_prefix[1]; } un_llsa; /* Intra-Area-Prefix */ struct { uint16_t intra_ap_nprefix; uint16_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 { uint8_t ospf6_version; uint8_t ospf6_type; uint16_t ospf6_len; rtrid_t ospf6_routerid; rtrid_t ospf6_areaid; uint16_t ospf6_chksum; uint8_t ospf6_instanceid; uint8_t ospf6_rsvd; }; /* * The OSPF6 header length is 16 bytes, regardless of how your compiler * might choose to pad the above structure. */ #define OSPF6HDR_LEN 16 /* Hello packet */ struct hello6 { uint32_t hello_ifid; union { uint8_t pri; uint32_t opt; } hello_priandopt; #define hello_priority hello_priandopt.pri #define hello_options hello_priandopt.opt uint16_t hello_helloint; uint16_t hello_deadint; rtrid_t hello_dr; rtrid_t hello_bdr; rtrid_t hello_neighbor[1]; /* may repeat */ }; /* Database Description packet */ struct dd6 { uint32_t db_options; uint16_t db_mtu; uint8_t db_mbz; uint8_t db_flags; uint32_t db_seq; struct lsa6_hdr db_lshdr[1]; /* may repeat */ }; /* Link State Request */ struct lsr6 { uint16_t ls_mbz; uint16_t ls_type; rtrid_t ls_stateid; rtrid_t ls_router; }; /* Link State Update */ struct lsu6 { uint32_t lsu_count; struct lsa6 lsu_lsa[1]; /* may repeat */ }; 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(netdissect_options *ndo, register u_int ls_type, register const rtrid_t *ls_stateid) { ND_PRINT((ndo, "\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(ndo, ls_stateid))); } static int ospf6_print_lshdr(netdissect_options *ndo, register const struct lsa6_hdr *lshp, const u_char *dataend) { if ((const u_char *)(lshp + 1) > dataend) goto trunc; ND_TCHECK(lshp->ls_type); ND_TCHECK(lshp->ls_seq); ND_PRINT((ndo, "\n\t Advertising Router %s, seq 0x%08x, age %us, length %u", ipaddr_string(ndo, &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(ndo, EXTRACT_16BITS(&lshp->ls_type), &lshp->ls_stateid); return (0); trunc: return (1); } static int ospf6_print_lsaprefix(netdissect_options *ndo, const uint8_t *tptr, u_int lsa_length) { const struct lsa6_prefix *lsapp = (const struct lsa6_prefix *)tptr; u_int wordlen; struct in6_addr prefix; if (lsa_length < sizeof (*lsapp) - IPV6_ADDR_LEN_BYTES) goto trunc; lsa_length -= sizeof (*lsapp) - IPV6_ADDR_LEN_BYTES; ND_TCHECK2(*lsapp, sizeof (*lsapp) - IPV6_ADDR_LEN_BYTES); wordlen = (lsapp->lsa_p_len + 31) / 32; if (wordlen * 4 > sizeof(struct in6_addr)) { ND_PRINT((ndo, " bogus prefixlen /%d", lsapp->lsa_p_len)); goto trunc; } if (lsa_length < wordlen * 4) goto trunc; lsa_length -= wordlen * 4; ND_TCHECK2(lsapp->lsa_p_prefix, wordlen * 4); memset(&prefix, 0, sizeof(prefix)); memcpy(&prefix, lsapp->lsa_p_prefix, wordlen * 4); ND_PRINT((ndo, "\n\t\t%s/%d", ip6addr_string(ndo, &prefix), lsapp->lsa_p_len)); if (lsapp->lsa_p_opt) { ND_PRINT((ndo, ", Options [%s]", bittok2str(ospf6_lsa_prefix_option_values, "none", lsapp->lsa_p_opt))); } ND_PRINT((ndo, ", metric %u", EXTRACT_16BITS(&lsapp->lsa_p_metric))); return sizeof(*lsapp) - IPV6_ADDR_LEN_BYTES + wordlen * 4; trunc: return -1; } /* * Print a single link state advertisement. If truncated return 1, else 0. */ static int ospf6_print_lsa(netdissect_options *ndo, 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 uint32_t *lp; #endif register u_int prefixes; register int bytelen; register u_int length, lsa_length; uint32_t flags32; const uint8_t *tptr; if (ospf6_print_lshdr(ndo, &lsap->ls_hdr, dataend)) return (1); ND_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) || (const u_char *)lsap + length > dataend) return (1); lsa_length = length - sizeof(struct lsa6_hdr); tptr = (const uint8_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); ND_TCHECK(lsap->lsa_un.un_rla.rla_options); ND_PRINT((ndo, "\n\t Options [%s]", bittok2str(ospf6_option_values, "none", EXTRACT_32BITS(&lsap->lsa_un.un_rla.rla_options)))); ND_PRINT((ndo, ", 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); ND_TCHECK(*rlp); switch (rlp->link_type) { case RLA_TYPE_VIRTUAL: ND_PRINT((ndo, "\n\t Virtual Link: Neighbor Router-ID %s" "\n\t Neighbor Interface-ID %s, Interface %s", ipaddr_string(ndo, &rlp->link_nrtid), ipaddr_string(ndo, &rlp->link_nifid), ipaddr_string(ndo, &rlp->link_ifid))); break; case RLA_TYPE_ROUTER: ND_PRINT((ndo, "\n\t Neighbor Router-ID %s" "\n\t Neighbor Interface-ID %s, Interface %s", ipaddr_string(ndo, &rlp->link_nrtid), ipaddr_string(ndo, &rlp->link_nifid), ipaddr_string(ndo, &rlp->link_ifid))); break; case RLA_TYPE_TRANSIT: ND_PRINT((ndo, "\n\t Neighbor Network-ID %s" "\n\t Neighbor Interface-ID %s, Interface %s", ipaddr_string(ndo, &rlp->link_nrtid), ipaddr_string(ndo, &rlp->link_nifid), ipaddr_string(ndo, &rlp->link_ifid))); break; default: ND_PRINT((ndo, "\n\t Unknown Router Links Type 0x%02x", rlp->link_type)); return (0); } ND_PRINT((ndo, ", 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); ND_TCHECK(lsap->lsa_un.un_nla.nla_options); ND_PRINT((ndo, "\n\t Options [%s]", bittok2str(ospf6_option_values, "none", EXTRACT_32BITS(&lsap->lsa_un.un_nla.nla_options)))); ND_PRINT((ndo, "\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); ND_TCHECK(*ap); ND_PRINT((ndo, "\n\t\t%s", ipaddr_string(ndo, 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); ND_TCHECK(lsap->lsa_un.un_inter_ap.inter_ap_metric); ND_PRINT((ndo, ", metric %u", EXTRACT_32BITS(&lsap->lsa_un.un_inter_ap.inter_ap_metric) & SLA_MASK_METRIC)); tptr = (const uint8_t *)lsap->lsa_un.un_inter_ap.inter_ap_prefix; while (lsa_length != 0) { bytelen = ospf6_print_lsaprefix(ndo, 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); ND_TCHECK(lsap->lsa_un.un_asla.asla_metric); flags32 = EXTRACT_32BITS(&lsap->lsa_un.un_asla.asla_metric); ND_PRINT((ndo, "\n\t Flags [%s]", bittok2str(ospf6_asla_flag_values, "none", flags32))); ND_PRINT((ndo, " metric %u", EXTRACT_32BITS(&lsap->lsa_un.un_asla.asla_metric) & ASLA_MASK_METRIC)); tptr = (const uint8_t *)lsap->lsa_un.un_asla.asla_prefix; lsapp = (const struct lsa6_prefix *)tptr; bytelen = ospf6_print_lsaprefix(ndo, tptr, lsa_length); if (bytelen < 0) goto trunc; lsa_length -= bytelen; tptr += bytelen; if ((flags32 & ASLA_FLAG_FWDADDR) != 0) { const struct in6_addr *fwdaddr6; fwdaddr6 = (const struct in6_addr *)tptr; if (lsa_length < sizeof (*fwdaddr6)) return (1); lsa_length -= sizeof (*fwdaddr6); ND_TCHECK(*fwdaddr6); ND_PRINT((ndo, " forward %s", ip6addr_string(ndo, fwdaddr6))); tptr += sizeof(*fwdaddr6); } if ((flags32 & ASLA_FLAG_ROUTETAG) != 0) { if (lsa_length < sizeof (uint32_t)) return (1); lsa_length -= sizeof (uint32_t); ND_TCHECK(*(const uint32_t *)tptr); ND_PRINT((ndo, " tag %s", ipaddr_string(ndo, (const uint32_t *)tptr))); tptr += sizeof(uint32_t); } if (lsapp->lsa_p_metric) { if (lsa_length < sizeof (uint32_t)) return (1); lsa_length -= sizeof (uint32_t); ND_TCHECK(*(const uint32_t *)tptr); ND_PRINT((ndo, " RefLSID: %s", ipaddr_string(ndo, (const uint32_t *)tptr))); tptr += sizeof(uint32_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); ND_TCHECK(llsap->llsa_priandopt); ND_PRINT((ndo, "\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); ND_TCHECK(llsap->llsa_nprefix); prefixes = EXTRACT_32BITS(&llsap->llsa_nprefix); ND_PRINT((ndo, "\n\t Priority %d, Link-local address %s, Prefixes %d:", llsap->llsa_priority, ip6addr_string(ndo, &llsap->llsa_lladdr), prefixes)); tptr = (const uint8_t *)llsap->llsa_prefix; while (prefixes > 0) { bytelen = ospf6_print_lsaprefix(ndo, 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); ND_TCHECK(lsap->lsa_un.un_intra_ap.intra_ap_rtid); ospf6_print_ls_type(ndo, 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); ND_TCHECK(lsap->lsa_un.un_intra_ap.intra_ap_nprefix); prefixes = EXTRACT_16BITS(&lsap->lsa_un.un_intra_ap.intra_ap_nprefix); ND_PRINT((ndo, "\n\t Prefixes %d:", prefixes)); tptr = (const uint8_t *)lsap->lsa_un.un_intra_ap.intra_ap_prefix; while (prefixes > 0) { bytelen = ospf6_print_lsaprefix(ndo, 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(ndo, tptr, lsa_length) == -1) { return 1; } break; case LS_TYPE_INTRA_ATE | LS_SCOPE_LINKLOCAL: if (ospf_print_te_lsa(ndo, tptr, lsa_length) == -1) { return 1; } break; default: if(!print_unknown_data(ndo,tptr, "\n\t ", lsa_length)) { return (1); } break; } return (0); trunc: return (1); } static int ospf6_decode_v3(netdissect_options *ndo, 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: { register const struct hello6 *hellop = (const struct hello6 *)((const uint8_t *)op + OSPF6HDR_LEN); ND_TCHECK_32BITS(&hellop->hello_options); ND_PRINT((ndo, "\n\tOptions [%s]", bittok2str(ospf6_option_values, "none", EXTRACT_32BITS(&hellop->hello_options)))); ND_TCHECK(hellop->hello_deadint); ND_PRINT((ndo, "\n\t Hello Timer %us, Dead Timer %us, Interface-ID %s, Priority %u", EXTRACT_16BITS(&hellop->hello_helloint), EXTRACT_16BITS(&hellop->hello_deadint), ipaddr_string(ndo, &hellop->hello_ifid), hellop->hello_priority)); ND_TCHECK(hellop->hello_dr); if (EXTRACT_32BITS(&hellop->hello_dr) != 0) ND_PRINT((ndo, "\n\t Designated Router %s", ipaddr_string(ndo, &hellop->hello_dr))); ND_TCHECK(hellop->hello_bdr); if (EXTRACT_32BITS(&hellop->hello_bdr) != 0) ND_PRINT((ndo, ", Backup Designated Router %s", ipaddr_string(ndo, &hellop->hello_bdr))); if (ndo->ndo_vflag > 1) { ND_PRINT((ndo, "\n\t Neighbor List:")); ap = hellop->hello_neighbor; while ((const u_char *)ap < dataend) { ND_TCHECK(*ap); ND_PRINT((ndo, "\n\t %s", ipaddr_string(ndo, ap))); ++ap; } } break; /* HELLO */ } case OSPF_TYPE_DD: { register const struct dd6 *ddp = (const struct dd6 *)((const uint8_t *)op + OSPF6HDR_LEN); ND_TCHECK(ddp->db_options); ND_PRINT((ndo, "\n\tOptions [%s]", bittok2str(ospf6_option_values, "none", EXTRACT_32BITS(&ddp->db_options)))); ND_TCHECK(ddp->db_flags); ND_PRINT((ndo, ", DD Flags [%s]", bittok2str(ospf6_dd_flag_values,"none",ddp->db_flags))); ND_TCHECK(ddp->db_seq); ND_PRINT((ndo, ", MTU %u, DD-Sequence 0x%08x", EXTRACT_16BITS(&ddp->db_mtu), EXTRACT_32BITS(&ddp->db_seq))); if (ndo->ndo_vflag > 1) { /* Print all the LS adv's */ lshp = ddp->db_lshdr; while ((const u_char *)lshp < dataend) { if (ospf6_print_lshdr(ndo, lshp++, dataend)) goto trunc; } } break; } case OSPF_TYPE_LS_REQ: if (ndo->ndo_vflag > 1) { lsrp = (const struct lsr6 *)((const uint8_t *)op + OSPF6HDR_LEN); while ((const u_char *)lsrp < dataend) { ND_TCHECK(*lsrp); ND_PRINT((ndo, "\n\t Advertising Router %s", ipaddr_string(ndo, &lsrp->ls_router))); ospf6_print_ls_type(ndo, EXTRACT_16BITS(&lsrp->ls_type), &lsrp->ls_stateid); ++lsrp; } } break; case OSPF_TYPE_LS_UPDATE: if (ndo->ndo_vflag > 1) { register const struct lsu6 *lsup = (const struct lsu6 *)((const uint8_t *)op + OSPF6HDR_LEN); ND_TCHECK(lsup->lsu_count); i = EXTRACT_32BITS(&lsup->lsu_count); lsap = lsup->lsu_lsa; while ((const u_char *)lsap < dataend && i--) { if (ospf6_print_lsa(ndo, lsap, dataend)) goto trunc; lsap = (const struct lsa6 *)((const u_char *)lsap + EXTRACT_16BITS(&lsap->ls_hdr.ls_length)); } } break; case OSPF_TYPE_LS_ACK: if (ndo->ndo_vflag > 1) { lshp = (const struct lsa6_hdr *)((const uint8_t *)op + OSPF6HDR_LEN); while ((const u_char *)lshp < dataend) { if (ospf6_print_lshdr(ndo, 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(netdissect_options *ndo, const u_char *cp, const u_int len) { uint16_t llsdatalen; if (len == 0) return 0; if (len < OSPF_LLS_HDRLEN) goto trunc; /* Checksum */ ND_TCHECK2(*cp, 2); ND_PRINT((ndo, "\n\tLLS Checksum 0x%04x", EXTRACT_16BITS(cp))); cp += 2; /* LLS Data Length */ ND_TCHECK2(*cp, 2); llsdatalen = EXTRACT_16BITS(cp); ND_PRINT((ndo, ", Data Length %u", llsdatalen)); if (llsdatalen < OSPF_LLS_HDRLEN || llsdatalen > len) goto trunc; cp += 2; /* LLS TLVs */ ND_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(netdissect_options *ndo, 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 */ ND_TCHECK2(*cp, 2); ND_PRINT((ndo, "\n\tAuthentication Type %s", tok2str(ospf6_auth_type_str, "unknown (0x%04x)", EXTRACT_16BITS(cp)))); cp += 2; /* Auth Data Len */ ND_TCHECK2(*cp, 2); authdatalen = EXTRACT_16BITS(cp); ND_PRINT((ndo, ", Length %u", authdatalen)); if (authdatalen < OSPF6_AT_HDRLEN || authdatalen > len) goto trunc; cp += 2; /* Reserved */ ND_TCHECK2(*cp, 2); cp += 2; /* Security Association ID */ ND_TCHECK2(*cp, 2); ND_PRINT((ndo, ", SAID %u", EXTRACT_16BITS(cp))); cp += 2; /* Cryptographic Sequence Number (High-Order 32 Bits) */ ND_TCHECK2(*cp, 4); ND_PRINT((ndo, ", CSN 0x%08x", EXTRACT_32BITS(cp))); cp += 4; /* Cryptographic Sequence Number (Low-Order 32 Bits) */ ND_TCHECK2(*cp, 4); ND_PRINT((ndo, ":%08x", EXTRACT_32BITS(cp))); cp += 4; /* Authentication Data */ ND_TCHECK2(*cp, authdatalen - OSPF6_AT_HDRLEN); if (ndo->ndo_vflag > 1) print_unknown_data(ndo,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(netdissect_options *ndo, const struct ospf6hdr *op, const u_char *cp, const unsigned len) { int llslen = 0; int lls_hello = 0; int lls_dd = 0; if (op->ospf6_type == OSPF_TYPE_HELLO) { const struct hello6 *hellop = (const struct hello6 *)((const uint8_t *)op + OSPF6HDR_LEN); ND_TCHECK(hellop->hello_options); if (EXTRACT_32BITS(&hellop->hello_options) & OSPF6_OPTION_L) lls_hello = 1; } else if (op->ospf6_type == OSPF_TYPE_DD) { const struct dd6 *ddp = (const struct dd6 *)((const uint8_t *)op + OSPF6HDR_LEN); ND_TCHECK(ddp->db_options); if (EXTRACT_32BITS(&ddp->db_options) & OSPF6_OPTION_L) lls_dd = 1; } if ((lls_hello || lls_dd) && (llslen = ospf6_print_lls(ndo, cp, len)) < 0) goto trunc; return ospf6_decode_at(ndo, cp + llslen, len - llslen); trunc: return 1; } void ospf6_print(netdissect_options *ndo, 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 = (const 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 */ ND_TCHECK(op->ospf6_type); cp = tok2str(ospf6_type_values, "unknown packet type (%u)", op->ospf6_type); ND_PRINT((ndo, "OSPFv%u, %s, length %d", op->ospf6_version, cp, length)); if (*cp == 'u') { return; } if(!ndo->ndo_vflag) { /* non verbose - so lets bail out here */ return; } /* OSPFv3 data always comes first and optional trailing data may follow. */ ND_TCHECK(op->ospf6_len); datalen = EXTRACT_16BITS(&op->ospf6_len); if (datalen > length) { ND_PRINT((ndo, " [len %d]", datalen)); return; } dataend = bp + datalen; ND_TCHECK(op->ospf6_routerid); ND_PRINT((ndo, "\n\tRouter-ID %s", ipaddr_string(ndo, &op->ospf6_routerid))); ND_TCHECK(op->ospf6_areaid); if (EXTRACT_32BITS(&op->ospf6_areaid) != 0) ND_PRINT((ndo, ", Area %s", ipaddr_string(ndo, &op->ospf6_areaid))); else ND_PRINT((ndo, ", Backbone Area")); ND_TCHECK(op->ospf6_instanceid); if (op->ospf6_instanceid) ND_PRINT((ndo, ", Instance %u", op->ospf6_instanceid)); /* Do rest according to version. */ switch (op->ospf6_version) { case 3: /* ospf version 3 */ if (ospf6_decode_v3(ndo, op, dataend) || ospf6_decode_v3_trailer(ndo, op, dataend, length - datalen)) goto trunc; break; } /* end switch on version */ return; trunc: ND_PRINT((ndo, "%s", tstr)); } #ifdef __rtems__ #include "rtems-bsd-tcpdump-print-ospf6-data.h" #endif /* __rtems__ */