X-Git-Url: https://git.tcpdump.org/tcpdump/blobdiff_plain/bbc1cfa669a5f51ed26bae3784447076e3fbc80f..0845bc813c1cc48b18cdefff0b387c110647463c:/print-ospf6.c diff --git a/print-ospf6.c b/print-ospf6.c index 1104799c..5032d8bc 100644 --- a/print-ospf6.c +++ b/print-ospf6.c @@ -21,206 +21,382 @@ * 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 1.13 2003-11-16 09:36:31 guy Exp $ (LBL)"; -#endif - #ifdef HAVE_CONFIG_H #include "config.h" #endif #include -#include #include -#include "interface.h" +#include "netdissect.h" #include "addrtoname.h" #include "extract.h" -#include "ospf6.h" - -struct bits { - u_int32_t bit; - const char *str; -}; - -static const struct bits ospf6_option_bits[] = { - { OSPF6_OPTION_V6, "V6" }, - { OSPF6_OPTION_E, "E" }, - { OSPF6_OPTION_MC, "MC" }, - { OSPF6_OPTION_N, "N" }, - { OSPF6_OPTION_R, "R" }, - { OSPF6_OPTION_DC, "DC" }, - { 0, NULL } -}; - -static const struct bits ospf6_rla_flag_bits[] = { - { RLA_FLAG_B, "B" }, - { RLA_FLAG_E, "E" }, - { RLA_FLAG_V, "V" }, - { RLA_FLAG_W, "W" }, - { 0, NULL } +#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; }; -static const struct bits ospf6_asla_flag_bits[] = { - { ASLA_FLAG_EXTERNAL, "E" }, - { ASLA_FLAG_FWDADDR, "F" }, - { ASLA_FLAG_ROUTETAG, "T" }, - { 0, NULL } -}; +/* Length of an IPv6 address, in bytes. */ +#define IPV6_ADDR_LEN_BYTES (128/8) -static struct tok type2str[] = { - { OSPF_TYPE_UMD, "umd" }, - { OSPF_TYPE_HELLO, "hello" }, - { OSPF_TYPE_DB, "dd" }, - { OSPF_TYPE_LSR, "ls_req" }, - { OSPF_TYPE_LSU, "ls_upd" }, - { OSPF_TYPE_LSA, "ls_ack" }, - { 0, NULL } +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 */ }; -static char tstr[] = " [|ospf]"; +/* 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; -#ifdef WIN32 -#define inline __inline -#endif /* WIN32 */ - -/* Forwards */ -static inline void ospf6_print_seqage(u_int32_t, time_t); -static inline void ospf6_print_bits(const struct bits *, u_char); -static void ospf6_print_ls_type(u_int, const rtrid_t *, - const rtrid_t *, const char *); -static int ospf6_print_lshdr(const struct lsa_hdr *); -static int ospf6_print_lsa(const struct lsa *); -static int ospf6_decode_v3(const struct ospf6hdr *, const u_char *); +#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 -static inline void -ospf6_print_seqage(register u_int32_t seq, register time_t us) -{ - register time_t sec = us % 60; - register time_t mins = (us / 60) % 60; - register time_t hour = us / 3600; - - printf(" S %X age ", seq); - if (hour) - printf("%u:%02u:%02u", - (u_int32_t) hour, (u_int32_t) mins, (u_int32_t) sec); - else if (mins) - printf("%u:%02u", (u_int32_t) mins, (u_int32_t) sec); - else - printf("%u", (u_int32_t) sec); -} + /* 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; +}; -static inline void -ospf6_print_bits(register const struct bits *bp, register u_char options) -{ - register char sep = ' '; +/* + * 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 */ +}; - do { - if (options & bp->bit) { - printf("%c%s", sep, bp->str); - sep = '/'; - } - } while ((++bp)->bit); -} +/* 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 */ +}; -static void -ospf6_print_ls_type(register u_int ls_type, - register const rtrid_t *ls_stateid, - register const rtrid_t *ls_router, register const char *fmt) -{ - const char *scope; +/* Link State Request */ +struct lsr6 { + uint16_t ls_mbz; + uint16_t ls_type; + rtrid_t ls_stateid; + rtrid_t ls_router; +}; - switch (ls_type & LS_SCOPE_MASK) { - case LS_SCOPE_LINKLOCAL: - scope = "linklocal-"; - break; - case LS_SCOPE_AREA: - scope = "area-"; - break; - case LS_SCOPE_AS: - scope = "AS-"; - break; - default: - scope = ""; - break; - } +/* Link State Update */ +struct lsu6 { + uint32_t lsu_count; + struct lsa6 lsu_lsa[1]; /* may repeat */ +}; - switch (ls_type & LS_TYPE_MASK) { - case LS_TYPE_ROUTER: - printf(" %srtr %s", scope, ipaddr_string(ls_router)); - break; +static const char tstr[] = " [|ospf3]"; - case LS_TYPE_NETWORK: - printf(" %snet dr %s if %s", scope, - ipaddr_string(ls_router), - ipaddr_string(ls_stateid)); - break; +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 } +}; - case LS_TYPE_INTER_AP: - printf(" %sinter-area-prefix %s abr %s", scope, - ipaddr_string(ls_stateid), - ipaddr_string(ls_router)); - break; +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 } +}; - case LS_TYPE_INTER_AR: - printf(" %sinter-area-router %s rtr %s", scope, - ipaddr_string(ls_router), - ipaddr_string(ls_stateid)); - break; +static const struct tok ospf6_asla_flag_values[] = { + { ASLA_FLAG_EXTERNAL, "External Type 2" }, + { ASLA_FLAG_FWDADDR, "Forwarding" }, + { ASLA_FLAG_ROUTETAG, "Tag" }, + { 0, NULL } +}; - case LS_TYPE_ASE: - printf(" %sase %s asbr %s", scope, - ipaddr_string(ls_stateid), - ipaddr_string(ls_router)); - break; +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 } +}; - case LS_TYPE_GROUP: - printf(" %sgroup %s rtr %s", scope, - ipaddr_string(ls_stateid), - ipaddr_string(ls_router)); - break; +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 } +}; - case LS_TYPE_TYPE7: - printf(" %stype7 %s rtr %s", scope, - ipaddr_string(ls_stateid), - ipaddr_string(ls_router)); - break; +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 } +}; - case LS_TYPE_LINK: - printf(" %slink %s rtr %s", scope, - ipaddr_string(ls_stateid), - ipaddr_string(ls_router)); - break; +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 } +}; - case LS_TYPE_INTRA_AP: - printf(" %sintra-area-prefix %s rtr %s", scope, - ipaddr_string(ls_stateid), - ipaddr_string(ls_router)); - break; +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 } +}; - default: - printf(" %s", scope); - printf(fmt, ls_type); - break; - } +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(register const struct lsa_hdr *lshp) +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); - TCHECK(lshp->ls_type); - printf(" {"); /* } (ctags) */ + 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))); - TCHECK(lshp->ls_seq); - ospf6_print_seqage(EXTRACT_32BITS(&lshp->ls_seq), EXTRACT_16BITS(&lshp->ls_age)); - ospf6_print_ls_type(EXTRACT_16BITS(&lshp->ls_type), &lshp->ls_stateid, - &lshp->ls_router, "ls_type %d"); + ospf6_print_ls_type(ndo, EXTRACT_16BITS(&lshp->ls_type), &lshp->ls_stateid); return (0); trunc: @@ -228,26 +404,37 @@ trunc: } static int -ospf6_print_lsaprefix(register const struct lsa_prefix *lsapp) +ospf6_print_lsaprefix(netdissect_options *ndo, + const uint8_t *tptr, u_int lsa_length) { - u_int k; + const struct lsa6_prefix *lsapp = (const struct lsa6_prefix *)tptr; + u_int wordlen; struct in6_addr prefix; - TCHECK(*lsapp); - k = (lsapp->lsa_p_len + 31) / 32; - if (k * 4 > sizeof(struct in6_addr)) { - printf("??prefixlen %d??", lsapp->lsa_p_len); + 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, k * 4); - printf(" %s/%d", ip6addr_string(&prefix), - lsapp->lsa_p_len); - if (lsapp->lsa_p_opt) - printf("(opt=%x)", lsapp->lsa_p_opt); - if (lsapp->lsa_p_mbz) - printf("(mbz=%x)", EXTRACT_16BITS(&lsapp->lsa_p_mbz)); /* XXX */ - return sizeof(*lsapp) - 4 + k * 4; + 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; @@ -258,10 +445,10 @@ trunc: * Print a single link state advertisement. If truncated return 1, else 0. */ static int -ospf6_print_lsa(register const struct lsa *lsap) +ospf6_print_lsa(netdissect_options *ndo, + register const struct lsa6 *lsap, const u_char *dataend) { - register const u_char *ls_end, *ls_opt; - register const struct rlalink *rlp; + register const struct rlalink6 *rlp; #if 0 register const struct tos_metric *tosp; #endif @@ -271,356 +458,379 @@ ospf6_print_lsa(register const struct lsa *lsap) register const struct mcla *mcp; #endif register const struct llsa *llsap; - register const struct lsa_prefix *lsapp; + register const struct lsa6_prefix *lsapp; #if 0 - register const u_int32_t *lp; + register const uint32_t *lp; #endif - register u_int j; - register int k; - u_int32_t flags32; + register u_int prefixes; + register int bytelen; + register u_int length, lsa_length; + uint32_t flags32; + const uint8_t *tptr; - if (ospf6_print_lshdr(&lsap->ls_hdr)) + if (ospf6_print_lshdr(ndo, &lsap->ls_hdr, dataend)) return (1); - TCHECK(lsap->ls_hdr.ls_length); - ls_end = (u_char *)lsap + EXTRACT_16BITS(&lsap->ls_hdr.ls_length); + 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: - TCHECK(lsap->lsa_un.un_rla.rla_flags); - ospf6_print_bits(ospf6_rla_flag_bits, - lsap->lsa_un.un_rla.rla_flags); - TCHECK(lsap->lsa_un.un_rla.rla_options); - ospf6_print_bits(ospf6_option_bits, - EXTRACT_32BITS(&lsap->lsa_un.un_rla.rla_options)); - - TCHECK(lsap->lsa_un.un_rla.rla_link); + 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 (rlp + sizeof(*rlp) <= (struct rlalink *)ls_end) { - TCHECK(*rlp); - printf(" {"); /* } (ctags) */ + 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: - printf(" virt"); - /* Fall through */ + 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: - printf(" nbrid %s nbrif %s if %s", - ipaddr_string(&rlp->link_nrtid), - ipaddr_string(&rlp->link_nifid), - ipaddr_string(&rlp->link_ifid)); + 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: - printf(" dr %s drif %s if %s", - ipaddr_string(&rlp->link_nrtid), - ipaddr_string(&rlp->link_nifid), - ipaddr_string(&rlp->link_ifid)); + 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: - /* { (ctags) */ - printf(" ??RouterLinksType 0x%02x?? }", - rlp->link_type); + ND_PRINT((ndo, "\n\t Unknown Router Links Type 0x%02x", + rlp->link_type)); return (0); } - printf(" metric %d", EXTRACT_16BITS(&rlp->link_metric)); - /* { (ctags) */ - printf(" }"); + ND_PRINT((ndo, ", metric %d", EXTRACT_16BITS(&rlp->link_metric))); rlp++; } break; case LS_TYPE_NETWORK | LS_SCOPE_AREA: - TCHECK(lsap->lsa_un.un_nla.nla_options); - ospf6_print_bits(ospf6_option_bits, - EXTRACT_32BITS(&lsap->lsa_un.un_nla.nla_options)); - printf(" rtrs"); + 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 ((u_char *)ap < ls_end) { - TCHECK(*ap); - printf(" %s", ipaddr_string(ap)); + 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: - 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); - lsapp = lsap->lsa_un.un_inter_ap.inter_ap_prefix; - while (lsapp + sizeof(lsapp) <= (struct lsa_prefix *)ls_end) { - k = ospf6_print_lsaprefix(lsapp); - if (k) + 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; - lsapp = (struct lsa_prefix *)(((u_char *)lsapp) + k); + lsa_length -= bytelen; + tptr += bytelen; } break; - case LS_SCOPE_AS | LS_TYPE_ASE: - TCHECK(lsap->lsa_un.un_asla.asla_metric); + + 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); - ospf6_print_bits(ospf6_asla_flag_bits, flags32); - printf(" metric %u", + 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); - lsapp = lsap->lsa_un.un_asla.asla_prefix; - k = ospf6_print_lsaprefix(lsapp); - if (k < 0) - goto trunc; - if ((ls_opt = (u_char *)(((u_char *)lsapp) + k)) < ls_end) { - struct in6_addr *fwdaddr6; - - if ((flags32 & ASLA_FLAG_FWDADDR) != 0) { - fwdaddr6 = (struct in6_addr *)ls_opt; - TCHECK(*fwdaddr6); - printf(" forward %s", - ip6addr_string(fwdaddr6)); - - ls_opt += sizeof(struct in6_addr); - } + ASLA_MASK_METRIC)); - if ((flags32 & ASLA_FLAG_ROUTETAG) != 0) { - TCHECK(*(u_int32_t *)ls_opt); - printf(" tag %s", - ipaddr_string((u_int32_t *)ls_opt)); - - ls_opt += sizeof(u_int32_t); - } - - if (lsapp->lsa_p_mbz) { - TCHECK(*(u_int32_t *)ls_opt); - printf(" RefLSID: %s", - ipaddr_string((u_int32_t *)ls_opt)); - - ls_opt += sizeof(u_int32_t); - } - } - break; -#if 0 - case LS_TYPE_SUM_ABR: - TCHECK(lsap->lsa_un.un_sla.sla_tosmetric); - lp = lsap->lsa_un.un_sla.sla_tosmetric; - while ((u_char *)lp < ls_end) { - register u_int32_t ul; - - TCHECK(*lp); - ul = EXTRACT_32BITS(lp); - printf(" tos %d metric %d", - (ul & SLA_MASK_TOS) >> SLA_SHIFT_TOS, - ul & SLA_MASK_METRIC); - ++lp; + 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); } - break; - case LS_TYPE_GROUP: - /* Multicast extensions as of 23 July 1991 */ - mcp = lsap->lsa_un.un_mcla; - while ((u_char *)mcp < ls_end) { - TCHECK(mcp->mcla_vid); - switch (EXTRACT_32BITS(&mcp->mcla_vtype)) { - - case MCLA_VERTEX_ROUTER: - printf(" rtr rtrid %s", - ipaddr_string(&mcp->mcla_vid)); - break; - - case MCLA_VERTEX_NETWORK: - printf(" net dr %s", - ipaddr_string(&mcp->mcla_vid)); - break; + 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); + } - default: - printf(" ??VertexType %u??", - EXTRACT_32BITS(&mcp->mcla_vtype)); - break; - } - ++mcp; + 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); } -#endif + break; case LS_TYPE_LINK: /* Link LSA */ llsap = &lsap->lsa_un.un_llsa; - TCHECK(llsap->llsa_options); - ospf6_print_bits(ospf6_option_bits, EXTRACT_32BITS(&llsap->llsa_options)); - TCHECK(llsap->llsa_nprefix); - printf(" pri %d lladdr %s npref %d", llsap->llsa_priority, - ip6addr_string(&llsap->llsa_lladdr), - EXTRACT_32BITS(&llsap->llsa_nprefix)); - lsapp = llsap->llsa_prefix; - for (j = 0; j < EXTRACT_32BITS(&llsap->llsa_nprefix); j++) { - k = ospf6_print_lsaprefix(lsapp); - if (k) + 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); + 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; - lsapp = (struct lsa_prefix *)(((u_char *)lsapp) + k); + prefixes--; + lsa_length -= bytelen; + tptr += bytelen; } break; case LS_TYPE_INTRA_AP | LS_SCOPE_AREA: /* Intra-Area-Prefix LSA */ - TCHECK(lsap->lsa_un.un_intra_ap.intra_ap_rtid); - ospf6_print_ls_type( + 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, - &lsap->lsa_un.un_intra_ap.intra_ap_rtid, - "LinkStateType %d"); - TCHECK(lsap->lsa_un.un_intra_ap.intra_ap_nprefix); - printf(" npref %d", - EXTRACT_16BITS(&lsap->lsa_un.un_intra_ap.intra_ap_nprefix)); - - lsapp = lsap->lsa_un.un_intra_ap.intra_ap_prefix; - for (j = 0; - j < EXTRACT_16BITS(&lsap->lsa_un.un_intra_ap.intra_ap_nprefix); - j++) { - k = ospf6_print_lsaprefix(lsapp); - if (k) + &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; - lsapp = (struct lsa_prefix *)(((u_char *)lsapp) + k); + 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: - printf(" ??LinkStateType 0x%04x??", - EXTRACT_16BITS(&lsap->ls_hdr.ls_type)); + if(!print_unknown_data(ndo,tptr, + "\n\t ", + lsa_length)) { + return (1); + } + break; } - /* { (ctags) */ - fputs(" }", stdout); return (0); trunc: - fputs(" }", stdout); return (1); } static int -ospf6_decode_v3(register const struct ospf6hdr *op, - register const u_char *dataend) +ospf6_decode_v3(netdissect_options *ndo, + register const struct ospf6hdr *op, + register const u_char *dataend) { register const rtrid_t *ap; - register const struct lsr *lsrp; - register const struct lsa_hdr *lshp; - register const struct lsa *lsap; - register char sep; + 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_UMD: - /* - * Rob Coltun's special monitoring packets; - * do nothing - */ - break; - - case OSPF_TYPE_HELLO: - if (vflag) { - TCHECK(op->ospf6_hello.hello_deadint); - ospf6_print_bits(ospf6_option_bits, - EXTRACT_32BITS(&op->ospf6_hello.hello_options)); - printf(" ifid %s pri %d int %d dead %u", - ipaddr_string(&op->ospf6_hello.hello_ifid), - op->ospf6_hello.hello_priority, - EXTRACT_16BITS(&op->ospf6_hello.hello_helloint), - EXTRACT_16BITS(&op->ospf6_hello.hello_deadint)); - } - TCHECK(op->ospf6_hello.hello_dr); - if (op->ospf6_hello.hello_dr != 0) - printf(" dr %s", - ipaddr_string(&op->ospf6_hello.hello_dr)); - TCHECK(op->ospf6_hello.hello_bdr); - if (op->ospf6_hello.hello_bdr != 0) - printf(" bdr %s", - ipaddr_string(&op->ospf6_hello.hello_bdr)); - if (vflag) { - printf(" nbrs"); - ap = op->ospf6_hello.hello_neighbor; - while ((u_char *)ap < dataend) { - TCHECK(*ap); - printf(" %s", ipaddr_string(ap)); + case OSPF_TYPE_HELLO: { + register const struct hello6 *hellop = (const struct hello6 *)((const uint8_t *)op + OSPF6HDR_LEN); + + 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_DB: - TCHECK(op->ospf6_db.db_options); - ospf6_print_bits(ospf6_option_bits, - EXTRACT_32BITS(&op->ospf6_db.db_options)); - sep = ' '; - TCHECK(op->ospf6_db.db_flags); - if (op->ospf6_db.db_flags & OSPF6_DB_INIT) { - printf("%cI", sep); - sep = '/'; - } - if (op->ospf6_db.db_flags & OSPF6_DB_MORE) { - printf("%cM", sep); - sep = '/'; - } - if (op->ospf6_db.db_flags & OSPF6_DB_MASTER) { - printf("%cMS", sep); - sep = '/'; - } - TCHECK(op->ospf6_db.db_seq); - printf(" mtu %u S %X", EXTRACT_16BITS(&op->ospf6_db.db_mtu), - EXTRACT_32BITS(&op->ospf6_db.db_seq)); - - if (vflag) { + 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 = op->ospf6_db.db_lshdr; - - while (!ospf6_print_lshdr(lshp)) { - /* { (ctags) */ - printf(" }"); - ++lshp; + lshp = ddp->db_lshdr; + while ((const u_char *)lshp < dataend) { + if (ospf6_print_lshdr(ndo, lshp++, dataend)) + goto trunc; } } break; + } - case OSPF_TYPE_LSR: - if (vflag) { - lsrp = op->ospf6_lsr; - while ((u_char *)lsrp < dataend) { - TCHECK(*lsrp); - printf(" {"); /* } (ctags) */ - ospf6_print_ls_type(EXTRACT_16BITS(&lsrp->ls_type), - &lsrp->ls_stateid, - &lsrp->ls_router, - "LinkStateType %d"); - /* { (ctags) */ - printf(" }"); + 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_LSU: - if (vflag) { - lsap = op->ospf6_lsu.lsu_lsa; - TCHECK(op->ospf6_lsu.lsu_count); - i = EXTRACT_32BITS(&op->ospf6_lsu.lsu_count); - while (i--) { - if (ospf6_print_lsa(lsap)) + 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 = (struct lsa *)((u_char *)lsap + + lsap = (const struct lsa6 *)((const u_char *)lsap + EXTRACT_16BITS(&lsap->ls_hdr.ls_length)); } } break; - - case OSPF_TYPE_LSA: - if (vflag) { - lshp = op->ospf6_lsa.lsa_lshdr; - - while (!ospf6_print_lshdr(lshp)) { - /* { (ctags) */ - printf(" }"); - ++lshp; + 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: - printf("v3 type %d", op->ospf6_type); break; } return (0); @@ -628,58 +838,171 @@ 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); + 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); + 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(register const u_char *bp, register u_int length) +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 = (struct ospf6hdr *)bp; + 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 */ - TCHECK(op->ospf6_type); - cp = tok2str(type2str, "type%d", op->ospf6_type); - printf("OSPFv%d-%s %d:", op->ospf6_version, cp, length); - if (*cp == 't') + 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; + } - TCHECK(op->ospf6_len); - if (length != EXTRACT_16BITS(&op->ospf6_len)) { - printf(" [len %d]", EXTRACT_16BITS(&op->ospf6_len)); + if(!ndo->ndo_vflag) { /* non verbose - so lets bail out here */ return; } - dataend = bp + length; - /* Print the routerid if it is not the same as the source */ - TCHECK(op->ospf6_routerid); - printf(" rtrid %s", ipaddr_string(&op->ospf6_routerid)); + /* 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; - TCHECK(op->ospf6_areaid); - if (op->ospf6_areaid != 0) - printf(" area %s", ipaddr_string(&op->ospf6_areaid)); + 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 - printf(" backbone"); - TCHECK(op->ospf6_instanceid); + ND_PRINT((ndo, ", Backbone Area")); + ND_TCHECK(op->ospf6_instanceid); if (op->ospf6_instanceid) - printf(" instance %u", 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(op, dataend)) + if (ospf6_decode_v3(ndo, op, dataend) || + ospf6_decode_v3_trailer(ndo, op, dataend, length - datalen)) goto trunc; break; - - default: - printf(" ospf [version %d]", op->ospf6_version); - break; } /* end switch on version */ return; trunc: - fputs(tstr, stdout); + ND_PRINT((ndo, "%s", tstr)); }