diff options
Diffstat (limited to 'contrib/tcpdump/print-ospf6.c')
| -rw-r--r-- | contrib/tcpdump/print-ospf6.c | 685 |
1 files changed, 685 insertions, 0 deletions
diff --git a/contrib/tcpdump/print-ospf6.c b/contrib/tcpdump/print-ospf6.c new file mode 100644 index 0000000..6325a21 --- /dev/null +++ b/contrib/tcpdump/print-ospf6.c @@ -0,0 +1,685 @@ +/* + * 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 1.13 2003/11/16 09:36:31 guy Exp $ (LBL)"; +#endif + +#ifdef HAVE_CONFIG_H +#include "config.h" +#endif + +#include <tcpdump-stdinc.h> + +#include <stdio.h> +#include <string.h> + +#include "interface.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 } +}; + +static const struct bits ospf6_asla_flag_bits[] = { + { ASLA_FLAG_EXTERNAL, "E" }, + { ASLA_FLAG_FWDADDR, "F" }, + { ASLA_FLAG_ROUTETAG, "T" }, + { 0, NULL } +}; + +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 } +}; + +static char tstr[] = " [|ospf]"; + +#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 *); + +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); +} + + +static inline void +ospf6_print_bits(register const struct bits *bp, register u_char options) +{ + register char sep = ' '; + + do { + if (options & bp->bit) { + printf("%c%s", sep, bp->str); + sep = '/'; + } + } while ((++bp)->bit); +} + +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; + + 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; + } + + switch (ls_type & LS_TYPE_MASK) { + case LS_TYPE_ROUTER: + printf(" %srtr %s", scope, ipaddr_string(ls_router)); + break; + + case LS_TYPE_NETWORK: + printf(" %snet dr %s if %s", scope, + ipaddr_string(ls_router), + ipaddr_string(ls_stateid)); + break; + + case LS_TYPE_INTER_AP: + printf(" %sinter-area-prefix %s abr %s", scope, + ipaddr_string(ls_stateid), + ipaddr_string(ls_router)); + break; + + case LS_TYPE_INTER_AR: + printf(" %sinter-area-router %s rtr %s", scope, + ipaddr_string(ls_router), + ipaddr_string(ls_stateid)); + break; + + case LS_TYPE_ASE: + printf(" %sase %s asbr %s", scope, + ipaddr_string(ls_stateid), + ipaddr_string(ls_router)); + break; + + case LS_TYPE_GROUP: + printf(" %sgroup %s rtr %s", scope, + ipaddr_string(ls_stateid), + ipaddr_string(ls_router)); + break; + + case LS_TYPE_TYPE7: + printf(" %stype7 %s rtr %s", scope, + ipaddr_string(ls_stateid), + ipaddr_string(ls_router)); + break; + + case LS_TYPE_LINK: + printf(" %slink %s rtr %s", scope, + ipaddr_string(ls_stateid), + ipaddr_string(ls_router)); + break; + + case LS_TYPE_INTRA_AP: + printf(" %sintra-area-prefix %s rtr %s", scope, + ipaddr_string(ls_stateid), + ipaddr_string(ls_router)); + break; + + default: + printf(" %s", scope); + printf(fmt, ls_type); + break; + } + +} + +static int +ospf6_print_lshdr(register const struct lsa_hdr *lshp) +{ + + TCHECK(lshp->ls_type); + printf(" {"); /* } (ctags) */ + + 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"); + + return (0); +trunc: + return (1); +} + +static int +ospf6_print_lsaprefix(register const struct lsa_prefix *lsapp) +{ + u_int k; + 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); + goto trunc; + } + 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; + +trunc: + return -1; +} + + +/* + * Print a single link state advertisement. If truncated return 1, else 0. + */ +static int +ospf6_print_lsa(register const struct lsa *lsap) +{ + register const u_char *ls_end, *ls_opt; + register const struct rlalink *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 lsa_prefix *lsapp; +#if 0 + register const u_int32_t *lp; +#endif + register u_int j; + register int k; + u_int32_t flags32; + + if (ospf6_print_lshdr(&lsap->ls_hdr)) + return (1); + TCHECK(lsap->ls_hdr.ls_length); + ls_end = (u_char *)lsap + EXTRACT_16BITS(&lsap->ls_hdr.ls_length); + 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); + rlp = lsap->lsa_un.un_rla.rla_link; + while (rlp + sizeof(*rlp) <= (struct rlalink *)ls_end) { + TCHECK(*rlp); + printf(" {"); /* } (ctags) */ + switch (rlp->link_type) { + + case RLA_TYPE_VIRTUAL: + printf(" virt"); + /* Fall through */ + + 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)); + 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)); + break; + + default: + /* { (ctags) */ + printf(" ??RouterLinksType 0x%02x?? }", + rlp->link_type); + return (0); + } + printf(" metric %d", EXTRACT_16BITS(&rlp->link_metric)); + /* { (ctags) */ + printf(" }"); + 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"); + ap = lsap->lsa_un.un_nla.nla_router; + while ((u_char *)ap < ls_end) { + TCHECK(*ap); + printf(" %s", ipaddr_string(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) + goto trunc; + lsapp = (struct lsa_prefix *)(((u_char *)lsapp) + k); + } + break; + case LS_SCOPE_AS | LS_TYPE_ASE: + 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", + 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); + } + + 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; + } + 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; + + default: + printf(" ??VertexType %u??", + EXTRACT_32BITS(&mcp->mcla_vtype)); + break; + } + ++mcp; + } +#endif + + 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) + goto trunc; + lsapp = (struct lsa_prefix *)(((u_char *)lsapp) + k); + } + 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( + 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) + goto trunc; + lsapp = (struct lsa_prefix *)(((u_char *)lsapp) + k); + } + break; + + default: + printf(" ??LinkStateType 0x%04x??", + EXTRACT_16BITS(&lsap->ls_hdr.ls_type)); + } + + /* { (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) +{ + 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 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)); + ++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) { + /* Print all the LS adv's */ + lshp = op->ospf6_db.db_lshdr; + + while (!ospf6_print_lshdr(lshp)) { + /* { (ctags) */ + printf(" }"); + ++lshp; + } + } + 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(" }"); + ++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)) + goto trunc; + lsap = (struct lsa *)((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; + } + } + break; + + default: + printf("v3 type %d", op->ospf6_type); + break; + } + return (0); +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; + + 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(type2str, "type%d", op->ospf6_type); + printf("OSPFv%d-%s %d:", op->ospf6_version, cp, length); + if (*cp == 't') + return; + + TCHECK(op->ospf6_len); + if (length != EXTRACT_16BITS(&op->ospf6_len)) { + printf(" [len %d]", EXTRACT_16BITS(&op->ospf6_len)); + 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)); + + TCHECK(op->ospf6_areaid); + if (op->ospf6_areaid != 0) + printf(" area %s", ipaddr_string(&op->ospf6_areaid)); + else + printf(" backbone"); + 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)) + goto trunc; + break; + + default: + printf(" ospf [version %d]", op->ospf6_version); + break; + } /* end switch on version */ + + return; +trunc: + fputs(tstr, stdout); +} |
