diff options
Diffstat (limited to 'freebsd/contrib/tcpdump/print-ospf.c')
| -rw-r--r-- | freebsd/contrib/tcpdump/print-ospf.c | 1159 |
1 files changed, 1159 insertions, 0 deletions
diff --git a/freebsd/contrib/tcpdump/print-ospf.c b/freebsd/contrib/tcpdump/print-ospf.c new file mode 100644 index 00000000..769a29f0 --- /dev/null +++ b/freebsd/contrib/tcpdump/print-ospf.c @@ -0,0 +1,1159 @@ +#include <machine/rtems-bsd-user-space.h> + +/* + * 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-ospf.c,v 1.66 2007-10-08 07:53:21 hannes Exp $ (LBL)"; +#endif + +#ifdef HAVE_CONFIG_H +#include "config.h" +#endif + +#include <tcpdump-stdinc.h> + +#include <stdio.h> + +#include "interface.h" +#include "addrtoname.h" +#include "extract.h" +#include "gmpls.h" + +#include "ospf.h" + +#include "ip.h" + +static struct tok ospf_option_values[] = { + { OSPF_OPTION_T, "MultiTopology" }, /* draft-ietf-ospf-mt-09 */ + { OSPF_OPTION_E, "External" }, + { OSPF_OPTION_MC, "Multicast" }, + { OSPF_OPTION_NP, "NSSA" }, + { OSPF_OPTION_L, "LLS" }, + { OSPF_OPTION_DC, "Demand Circuit" }, + { OSPF_OPTION_O, "Opaque" }, + { OSPF_OPTION_DN, "Up/Down" }, + { 0, NULL } +}; + +static struct tok ospf_authtype_values[] = { + { OSPF_AUTH_NONE, "none" }, + { OSPF_AUTH_SIMPLE, "simple" }, + { OSPF_AUTH_MD5, "MD5" }, + { 0, NULL } +}; + +static struct tok ospf_rla_flag_values[] = { + { RLA_FLAG_B, "ABR" }, + { RLA_FLAG_E, "ASBR" }, + { RLA_FLAG_W1, "Virtual" }, + { RLA_FLAG_W2, "W2" }, + { 0, NULL } +}; + +static struct tok type2str[] = { + { OSPF_TYPE_UMD, "UMD" }, + { 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 struct tok lsa_values[] = { + { LS_TYPE_ROUTER, "Router" }, + { LS_TYPE_NETWORK, "Network" }, + { LS_TYPE_SUM_IP, "Summary" }, + { LS_TYPE_SUM_ABR, "ASBR Summary" }, + { LS_TYPE_ASE, "External" }, + { LS_TYPE_GROUP, "Multicast Group" }, + { LS_TYPE_NSSA, "NSSA" }, + { LS_TYPE_OPAQUE_LL, "Link Local Opaque" }, + { LS_TYPE_OPAQUE_AL, "Area Local Opaque" }, + { LS_TYPE_OPAQUE_DW, "Domain Wide Opaque" }, + { 0, NULL } +}; + +static struct tok ospf_dd_flag_values[] = { + { OSPF_DB_INIT, "Init" }, + { OSPF_DB_MORE, "More" }, + { OSPF_DB_MASTER, "Master" }, + { OSPF_DB_RESYNC, "OOBResync" }, + { 0, NULL } +}; + +static struct tok lsa_opaque_values[] = { + { LS_OPAQUE_TYPE_TE, "Traffic Engineering" }, + { LS_OPAQUE_TYPE_GRACE, "Graceful restart" }, + { LS_OPAQUE_TYPE_RI, "Router Information" }, + { 0, NULL } +}; + +static struct tok lsa_opaque_te_tlv_values[] = { + { LS_OPAQUE_TE_TLV_ROUTER, "Router Address" }, + { LS_OPAQUE_TE_TLV_LINK, "Link" }, + { 0, NULL } +}; + +static struct tok lsa_opaque_te_link_tlv_subtlv_values[] = { + { LS_OPAQUE_TE_LINK_SUBTLV_LINK_TYPE, "Link Type" }, + { LS_OPAQUE_TE_LINK_SUBTLV_LINK_ID, "Link ID" }, + { LS_OPAQUE_TE_LINK_SUBTLV_LOCAL_IP, "Local Interface IP address" }, + { LS_OPAQUE_TE_LINK_SUBTLV_REMOTE_IP, "Remote Interface IP address" }, + { LS_OPAQUE_TE_LINK_SUBTLV_TE_METRIC, "Traffic Engineering Metric" }, + { LS_OPAQUE_TE_LINK_SUBTLV_MAX_BW, "Maximum Bandwidth" }, + { LS_OPAQUE_TE_LINK_SUBTLV_MAX_RES_BW, "Maximum Reservable Bandwidth" }, + { LS_OPAQUE_TE_LINK_SUBTLV_UNRES_BW, "Unreserved Bandwidth" }, + { LS_OPAQUE_TE_LINK_SUBTLV_ADMIN_GROUP, "Administrative Group" }, + { LS_OPAQUE_TE_LINK_SUBTLV_LINK_LOCAL_REMOTE_ID, "Link Local/Remote Identifier" }, + { LS_OPAQUE_TE_LINK_SUBTLV_LINK_PROTECTION_TYPE, "Link Protection Type" }, + { LS_OPAQUE_TE_LINK_SUBTLV_INTF_SW_CAP_DESCR, "Interface Switching Capability" }, + { LS_OPAQUE_TE_LINK_SUBTLV_SHARED_RISK_GROUP, "Shared Risk Link Group" }, + { LS_OPAQUE_TE_LINK_SUBTLV_BW_CONSTRAINTS, "Bandwidth Constraints" }, + { 0, NULL } +}; + +static struct tok lsa_opaque_grace_tlv_values[] = { + { LS_OPAQUE_GRACE_TLV_PERIOD, "Grace Period" }, + { LS_OPAQUE_GRACE_TLV_REASON, "Graceful restart Reason" }, + { LS_OPAQUE_GRACE_TLV_INT_ADDRESS, "IPv4 interface address" }, + { 0, NULL } +}; + +static struct tok lsa_opaque_grace_tlv_reason_values[] = { + { LS_OPAQUE_GRACE_TLV_REASON_UNKNOWN, "Unknown" }, + { LS_OPAQUE_GRACE_TLV_REASON_SW_RESTART, "Software Restart" }, + { LS_OPAQUE_GRACE_TLV_REASON_SW_UPGRADE, "Software Reload/Upgrade" }, + { LS_OPAQUE_GRACE_TLV_REASON_CP_SWITCH, "Control Processor Switch" }, + { 0, NULL } +}; + +static struct tok lsa_opaque_te_tlv_link_type_sub_tlv_values[] = { + { LS_OPAQUE_TE_LINK_SUBTLV_LINK_TYPE_PTP, "Point-to-point" }, + { LS_OPAQUE_TE_LINK_SUBTLV_LINK_TYPE_MA, "Multi-Access" }, + { 0, NULL } +}; + +static struct tok lsa_opaque_ri_tlv_values[] = { + { LS_OPAQUE_RI_TLV_CAP, "Router Capabilities" }, + { 0, NULL } +}; + +static struct tok lsa_opaque_ri_tlv_cap_values[] = { + { 1, "Reserved" }, + { 2, "Reserved" }, + { 4, "Reserved" }, + { 8, "Reserved" }, + { 16, "graceful restart capable" }, + { 32, "graceful restart helper" }, + { 64, "Stub router support" }, + { 128, "Traffic engineering" }, + { 256, "p2p over LAN" }, + { 512, "path computation server" }, + { 0, NULL } +}; + +static struct tok ospf_lls_tlv_values[] = { + { OSPF_LLS_EO, "Extended Options" }, + { OSPF_LLS_MD5, "MD5 Authentication" }, + { 0, NULL } +}; + +static struct tok ospf_lls_eo_options[] = { + { OSPF_LLS_EO_LR, "LSDB resync" }, + { OSPF_LLS_EO_RS, "Restart" }, + { 0, NULL } +}; + +static char tstr[] = " [|ospf2]"; + +#ifdef WIN32 +#define inline __inline +#endif /* WIN32 */ + +static int ospf_print_lshdr(const struct lsa_hdr *); +static const u_char *ospf_print_lsa(const struct lsa *); +static int ospf_decode_v2(const struct ospfhdr *, const u_char *); +static int ospf_decode_lls(const struct ospfhdr *, register u_int); + +int +ospf_print_grace_lsa (const u_int8_t *tptr, u_int ls_length) { + + u_int tlv_type, tlv_length; + + + while (ls_length > 0) { + TCHECK2(*tptr, 4); + if (ls_length < 4) { + printf("\n\t Remaining LS length %u < 4", ls_length); + return -1; + } + tlv_type = EXTRACT_16BITS(tptr); + tlv_length = EXTRACT_16BITS(tptr+2); + tptr+=4; + ls_length-=4; + + printf("\n\t %s TLV (%u), length %u, value: ", + tok2str(lsa_opaque_grace_tlv_values,"unknown",tlv_type), + tlv_type, + tlv_length); + + if (tlv_length > ls_length) { + printf("\n\t Bogus length %u > %u", tlv_length, + ls_length); + return -1; + } + + /* Infinite loop protection. */ + if (tlv_type == 0 || tlv_length ==0) { + return -1; + } + + TCHECK2(*tptr, tlv_length); + switch(tlv_type) { + + case LS_OPAQUE_GRACE_TLV_PERIOD: + if (tlv_length != 4) { + printf("\n\t Bogus length %u != 4", tlv_length); + return -1; + } + printf("%us",EXTRACT_32BITS(tptr)); + break; + + case LS_OPAQUE_GRACE_TLV_REASON: + if (tlv_length != 1) { + printf("\n\t Bogus length %u != 1", tlv_length); + return -1; + } + printf("%s (%u)", + tok2str(lsa_opaque_grace_tlv_reason_values, "Unknown", *tptr), + *tptr); + break; + + case LS_OPAQUE_GRACE_TLV_INT_ADDRESS: + if (tlv_length != 4) { + printf("\n\t Bogus length %u != 4", tlv_length); + return -1; + } + printf("%s", ipaddr_string(tptr)); + break; + + default: + if (vflag <= 1) { + if(!print_unknown_data(tptr,"\n\t ",tlv_length)) + return -1; + } + break; + + } + /* in OSPF everything has to be 32-bit aligned, including TLVs */ + if (tlv_length%4 != 0) + tlv_length+=4-(tlv_length%4); + ls_length-=tlv_length; + tptr+=tlv_length; + } + + return 0; +trunc: + return -1; +} + +int +ospf_print_te_lsa (const u_int8_t *tptr, u_int ls_length) { + + u_int tlv_type, tlv_length, subtlv_type, subtlv_length; + u_int priority_level, te_class, count_srlg; + union { /* int to float conversion buffer for several subTLVs */ + float f; + u_int32_t i; + } bw; + + while (ls_length != 0) { + TCHECK2(*tptr, 4); + if (ls_length < 4) { + printf("\n\t Remaining LS length %u < 4", ls_length); + return -1; + } + tlv_type = EXTRACT_16BITS(tptr); + tlv_length = EXTRACT_16BITS(tptr+2); + tptr+=4; + ls_length-=4; + + printf("\n\t %s TLV (%u), length: %u", + tok2str(lsa_opaque_te_tlv_values,"unknown",tlv_type), + tlv_type, + tlv_length); + + if (tlv_length > ls_length) { + printf("\n\t Bogus length %u > %u", tlv_length, + ls_length); + return -1; + } + + /* Infinite loop protection. */ + if (tlv_type == 0 || tlv_length ==0) { + return -1; + } + + switch(tlv_type) { + case LS_OPAQUE_TE_TLV_LINK: + while (tlv_length >= sizeof(subtlv_type) + sizeof(subtlv_length)) { + if (tlv_length < 4) { + printf("\n\t Remaining TLV length %u < 4", + tlv_length); + return -1; + } + TCHECK2(*tptr, 4); + subtlv_type = EXTRACT_16BITS(tptr); + subtlv_length = EXTRACT_16BITS(tptr+2); + tptr+=4; + tlv_length-=4; + + printf("\n\t %s subTLV (%u), length: %u", + tok2str(lsa_opaque_te_link_tlv_subtlv_values,"unknown",subtlv_type), + subtlv_type, + subtlv_length); + + TCHECK2(*tptr, subtlv_length); + switch(subtlv_type) { + case LS_OPAQUE_TE_LINK_SUBTLV_ADMIN_GROUP: + printf(", 0x%08x", EXTRACT_32BITS(tptr)); + break; + case LS_OPAQUE_TE_LINK_SUBTLV_LINK_ID: + case LS_OPAQUE_TE_LINK_SUBTLV_LINK_LOCAL_REMOTE_ID: + printf(", %s (0x%08x)", + ipaddr_string(tptr), + EXTRACT_32BITS(tptr)); + if (subtlv_length == 8) /* rfc4203 */ + printf(", %s (0x%08x)", + ipaddr_string(tptr+4), + EXTRACT_32BITS(tptr+4)); + break; + case LS_OPAQUE_TE_LINK_SUBTLV_LOCAL_IP: + case LS_OPAQUE_TE_LINK_SUBTLV_REMOTE_IP: + printf(", %s", ipaddr_string(tptr)); + break; + case LS_OPAQUE_TE_LINK_SUBTLV_MAX_BW: + case LS_OPAQUE_TE_LINK_SUBTLV_MAX_RES_BW: + bw.i = EXTRACT_32BITS(tptr); + printf(", %.3f Mbps", bw.f*8/1000000 ); + break; + case LS_OPAQUE_TE_LINK_SUBTLV_UNRES_BW: + for (te_class = 0; te_class < 8; te_class++) { + bw.i = EXTRACT_32BITS(tptr+te_class*4); + printf("\n\t\tTE-Class %u: %.3f Mbps", + te_class, + bw.f*8/1000000 ); + } + break; + case LS_OPAQUE_TE_LINK_SUBTLV_BW_CONSTRAINTS: + printf("\n\t\tBandwidth Constraints Model ID: %s (%u)", + tok2str(diffserv_te_bc_values, "unknown", *tptr), + *tptr); + /* decode BCs until the subTLV ends */ + for (te_class = 0; te_class < (subtlv_length-4)/4; te_class++) { + bw.i = EXTRACT_32BITS(tptr+4+te_class*4); + printf("\n\t\t Bandwidth constraint CT%u: %.3f Mbps", + te_class, + bw.f*8/1000000 ); + } + break; + case LS_OPAQUE_TE_LINK_SUBTLV_TE_METRIC: + printf(", Metric %u", EXTRACT_32BITS(tptr)); + break; + case LS_OPAQUE_TE_LINK_SUBTLV_LINK_PROTECTION_TYPE: + printf(", %s, Priority %u", + bittok2str(gmpls_link_prot_values, "none", *tptr), + *(tptr+1)); + break; + case LS_OPAQUE_TE_LINK_SUBTLV_INTF_SW_CAP_DESCR: + printf("\n\t\tInterface Switching Capability: %s", + tok2str(gmpls_switch_cap_values, "Unknown", *(tptr))); + printf("\n\t\tLSP Encoding: %s\n\t\tMax LSP Bandwidth:", + tok2str(gmpls_encoding_values, "Unknown", *(tptr+1))); + for (priority_level = 0; priority_level < 8; priority_level++) { + bw.i = EXTRACT_32BITS(tptr+4+(priority_level*4)); + printf("\n\t\t priority level %d: %.3f Mbps", + priority_level, + bw.f*8/1000000 ); + } + break; + case LS_OPAQUE_TE_LINK_SUBTLV_LINK_TYPE: + printf(", %s (%u)", + tok2str(lsa_opaque_te_tlv_link_type_sub_tlv_values,"unknown",*tptr), + *tptr); + break; + + case LS_OPAQUE_TE_LINK_SUBTLV_SHARED_RISK_GROUP: + count_srlg = subtlv_length / 4; + if (count_srlg != 0) + printf("\n\t\t Shared risk group: "); + while (count_srlg > 0) { + bw.i = EXTRACT_32BITS(tptr); + printf("%d",bw.i); + tptr+=4; + count_srlg--; + if (count_srlg > 0) + printf(", "); + } + break; + + default: + if (vflag <= 1) { + if(!print_unknown_data(tptr,"\n\t\t",subtlv_length)) + return -1; + } + break; + } + /* in OSPF everything has to be 32-bit aligned, including subTLVs */ + if (subtlv_length%4 != 0) + subtlv_length+=4-(subtlv_length%4); + + tlv_length-=subtlv_length; + tptr+=subtlv_length; + + } + break; + + case LS_OPAQUE_TE_TLV_ROUTER: + if (tlv_length < 4) { + printf("\n\t TLV length %u < 4", tlv_length); + return -1; + } + TCHECK2(*tptr, 4); + printf(", %s", ipaddr_string(tptr)); + break; + + default: + if (vflag <= 1) { + if(!print_unknown_data(tptr,"\n\t ",tlv_length)) + return -1; + } + break; + } + /* in OSPF everything has to be 32-bit aligned, including TLVs */ + if (tlv_length%4 != 0) + tlv_length+=4-(tlv_length%4); + ls_length-=tlv_length; + tptr+=tlv_length; + } + return 0; +trunc: + return -1; +} + + +static int +ospf_print_lshdr(register const struct lsa_hdr *lshp) +{ + u_int ls_length; + + TCHECK(lshp->ls_length); + ls_length = EXTRACT_16BITS(&lshp->ls_length); + if (ls_length < sizeof(struct lsa_hdr)) { + printf("\n\t Bogus length %u < header (%lu)", ls_length, + (unsigned long)sizeof(struct lsa_hdr)); + return(-1); + } + + TCHECK(lshp->ls_seq); /* XXX - ls_length check checked this */ + 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), + ls_length-(u_int)sizeof(struct lsa_hdr)); + + TCHECK(lshp->ls_type); /* XXX - ls_length check checked this */ + switch (lshp->ls_type) { + /* the LSA header for opaque LSAs was slightly changed */ + case LS_TYPE_OPAQUE_LL: + case LS_TYPE_OPAQUE_AL: + case LS_TYPE_OPAQUE_DW: + printf("\n\t %s LSA (%d), Opaque-Type %s LSA (%u), Opaque-ID %u", + tok2str(lsa_values,"unknown",lshp->ls_type), + lshp->ls_type, + + tok2str(lsa_opaque_values, + "unknown", + *(&lshp->un_lsa_id.opaque_field.opaque_type)), + *(&lshp->un_lsa_id.opaque_field.opaque_type), + EXTRACT_24BITS(&lshp->un_lsa_id.opaque_field.opaque_id) + + ); + break; + + /* all other LSA types use regular style LSA headers */ + default: + printf("\n\t %s LSA (%d), LSA-ID: %s", + tok2str(lsa_values,"unknown",lshp->ls_type), + lshp->ls_type, + ipaddr_string(&lshp->un_lsa_id.lsa_id)); + break; + } + + TCHECK(lshp->ls_options); /* XXX - ls_length check checked this */ + printf("\n\t Options: [%s]", bittok2str(ospf_option_values,"none",lshp->ls_options)); + + return (ls_length); +trunc: + return (-1); +} + +/* draft-ietf-ospf-mt-09 */ +static struct tok ospf_topology_values[] = { + { 0, "default " }, + { 1, "multicast " }, + { 2, "management " }, + { 0, NULL } +}; + +/* + * Print all the per-topology metrics. + */ +static void +ospf_print_tos_metrics(const union un_tos *tos) +{ + int metric_count; + int toscount; + + toscount = tos->link.link_tos_count+1; + metric_count = 0; + + /* + * All but the first metric contain a valid topology id. + */ + while (toscount) { + printf("\n\t\ttopology %s(%u), metric %u", + tok2str(ospf_topology_values, "", + metric_count ? tos->metrics.tos_type : 0), + metric_count ? tos->metrics.tos_type : 0, + EXTRACT_16BITS(&tos->metrics.tos_metric)); + metric_count++; + tos++; + toscount--; + } +} + +/* + * Print a single link state advertisement. If truncated or if LSA length + * field is less than the length of the LSA header, return NULl, else + * return pointer to data past end of LSA. + */ +static const u_int8_t * +ospf_print_lsa(register const struct lsa *lsap) +{ + register const u_int8_t *ls_end; + register const struct rlalink *rlp; + register const struct in_addr *ap; + register const struct aslametric *almp; + register const struct mcla *mcp; + register const u_int32_t *lp; + register int j, tlv_type, tlv_length, topology; + register int ls_length; + const u_int8_t *tptr; + + tptr = (u_int8_t *)lsap->lsa_un.un_unknown; /* squelch compiler warnings */ + ls_length = ospf_print_lshdr(&lsap->ls_hdr); + if (ls_length == -1) + return(NULL); + ls_end = (u_int8_t *)lsap + ls_length; + ls_length -= sizeof(struct lsa_hdr); + + switch (lsap->ls_hdr.ls_type) { + + case LS_TYPE_ROUTER: + TCHECK(lsap->lsa_un.un_rla.rla_flags); + printf("\n\t Router LSA Options: [%s]", bittok2str(ospf_rla_flag_values,"none",lsap->lsa_un.un_rla.rla_flags)); + + TCHECK(lsap->lsa_un.un_rla.rla_count); + j = EXTRACT_16BITS(&lsap->lsa_un.un_rla.rla_count); + TCHECK(lsap->lsa_un.un_rla.rla_link); + rlp = lsap->lsa_un.un_rla.rla_link; + while (j--) { + TCHECK(*rlp); + switch (rlp->un_tos.link.link_type) { + + case RLA_TYPE_VIRTUAL: + printf("\n\t Virtual Link: Neighbor Router-ID: %s, Interface Address: %s", + ipaddr_string(&rlp->link_id), + ipaddr_string(&rlp->link_data)); + break; + + case RLA_TYPE_ROUTER: + printf("\n\t Neighbor Router-ID: %s, Interface Address: %s", + ipaddr_string(&rlp->link_id), + ipaddr_string(&rlp->link_data)); + break; + + case RLA_TYPE_TRANSIT: + printf("\n\t Neighbor Network-ID: %s, Interface Address: %s", + ipaddr_string(&rlp->link_id), + ipaddr_string(&rlp->link_data)); + break; + + case RLA_TYPE_STUB: + printf("\n\t Stub Network: %s, Mask: %s", + ipaddr_string(&rlp->link_id), + ipaddr_string(&rlp->link_data)); + break; + + default: + printf("\n\t Unknown Router Link Type (%u)", + rlp->un_tos.link.link_type); + return (ls_end); + } + + ospf_print_tos_metrics(&rlp->un_tos); + + rlp = (struct rlalink *)((u_char *)(rlp + 1) + + ((rlp->un_tos.link.link_tos_count) * sizeof(union un_tos))); + } + break; + + case LS_TYPE_NETWORK: + TCHECK(lsap->lsa_un.un_nla.nla_mask); + printf("\n\t Mask %s\n\t Connected Routers:", + ipaddr_string(&lsap->lsa_un.un_nla.nla_mask)); + ap = lsap->lsa_un.un_nla.nla_router; + while ((u_char *)ap < ls_end) { + TCHECK(*ap); + printf("\n\t %s", ipaddr_string(ap)); + ++ap; + } + break; + + case LS_TYPE_SUM_IP: + TCHECK(lsap->lsa_un.un_nla.nla_mask); + printf("\n\t Mask %s", + ipaddr_string(&lsap->lsa_un.un_sla.sla_mask)); + 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); + topology = (ul & SLA_MASK_TOS) >> SLA_SHIFT_TOS; + printf("\n\t\ttopology %s(%u) metric %d", + tok2str(ospf_topology_values, "", topology), + topology, + ul & SLA_MASK_METRIC); + ++lp; + } + break; + + 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); + topology = (ul & SLA_MASK_TOS) >> SLA_SHIFT_TOS; + printf("\n\t\ttopology %s(%u) metric %d", + tok2str(ospf_topology_values, "", topology), + topology, + ul & SLA_MASK_METRIC); + ++lp; + } + break; + + case LS_TYPE_ASE: + case LS_TYPE_NSSA: /* fall through - those LSAs share the same format */ + TCHECK(lsap->lsa_un.un_nla.nla_mask); + printf("\n\t Mask %s", + ipaddr_string(&lsap->lsa_un.un_asla.asla_mask)); + + TCHECK(lsap->lsa_un.un_sla.sla_tosmetric); + almp = lsap->lsa_un.un_asla.asla_metric; + while ((u_char *)almp < ls_end) { + register u_int32_t ul; + + TCHECK(almp->asla_tosmetric); + ul = EXTRACT_32BITS(&almp->asla_tosmetric); + topology = ((ul & ASLA_MASK_TOS) >> ASLA_SHIFT_TOS); + printf("\n\t\ttopology %s(%u), type %d, metric", + tok2str(ospf_topology_values, "", topology), + topology, + (ul & ASLA_FLAG_EXTERNAL) ? 2 : 1); + if ((ul & ASLA_MASK_METRIC)==0xffffff) + printf(" infinite"); + else + printf(" %d", (ul & ASLA_MASK_METRIC)); + + TCHECK(almp->asla_forward); + if (almp->asla_forward.s_addr) { + printf(", forward %s", + ipaddr_string(&almp->asla_forward)); + } + TCHECK(almp->asla_tag); + if (almp->asla_tag.s_addr) { + printf(", tag %s", + ipaddr_string(&almp->asla_tag)); + } + ++almp; + } + break; + + case LS_TYPE_GROUP: + /* Multicast extensions as of 23 July 1991 */ + mcp = lsap->lsa_un.un_mcla; + while ((u_char *)mcp < ls_end) { + TCHECK(mcp->mcla_vid); + switch (EXTRACT_32BITS(&mcp->mcla_vtype)) { + + case MCLA_VERTEX_ROUTER: + printf("\n\t Router Router-ID %s", + ipaddr_string(&mcp->mcla_vid)); + break; + + case MCLA_VERTEX_NETWORK: + printf("\n\t Network Designated Router %s", + ipaddr_string(&mcp->mcla_vid)); + break; + + default: + printf("\n\t unknown VertexType (%u)", + EXTRACT_32BITS(&mcp->mcla_vtype)); + break; + } + ++mcp; + } + break; + + case LS_TYPE_OPAQUE_LL: /* fall through */ + case LS_TYPE_OPAQUE_AL: + case LS_TYPE_OPAQUE_DW: + + switch (*(&lsap->ls_hdr.un_lsa_id.opaque_field.opaque_type)) { + case LS_OPAQUE_TYPE_RI: + tptr = (u_int8_t *)(&lsap->lsa_un.un_ri_tlv.type); + + while (ls_length != 0) { + TCHECK2(*tptr, 4); + if (ls_length < 4) { + printf("\n\t Remaining LS length %u < 4", ls_length); + return(ls_end); + } + tlv_type = EXTRACT_16BITS(tptr); + tlv_length = EXTRACT_16BITS(tptr+2); + tptr+=4; + ls_length-=4; + + printf("\n\t %s TLV (%u), length: %u, value: ", + tok2str(lsa_opaque_ri_tlv_values,"unknown",tlv_type), + tlv_type, + tlv_length); + + if (tlv_length > ls_length) { + printf("\n\t Bogus length %u > %u", tlv_length, + ls_length); + return(ls_end); + } + TCHECK2(*tptr, tlv_length); + switch(tlv_type) { + + case LS_OPAQUE_RI_TLV_CAP: + if (tlv_length != 4) { + printf("\n\t Bogus length %u != 4", tlv_length); + return(ls_end); + } + printf("Capabilities: %s", + bittok2str(lsa_opaque_ri_tlv_cap_values, "Unknown", EXTRACT_32BITS(tptr))); + break; + default: + if (vflag <= 1) { + if(!print_unknown_data(tptr,"\n\t ",tlv_length)) + return(ls_end); + } + break; + + } + tptr+=tlv_length; + ls_length-=tlv_length; + } + break; + + case LS_OPAQUE_TYPE_GRACE: + if (ospf_print_grace_lsa((u_int8_t *)(&lsap->lsa_un.un_grace_tlv.type), + ls_length) == -1) { + return(ls_end); + } + break; + + case LS_OPAQUE_TYPE_TE: + if (ospf_print_te_lsa((u_int8_t *)(&lsap->lsa_un.un_te_lsa_tlv.type), + ls_length) == -1) { + return(ls_end); + } + break; + + default: + if (vflag <= 1) { + if(!print_unknown_data((u_int8_t *)lsap->lsa_un.un_unknown, + "\n\t ", ls_length)) + return(ls_end); + } + break; + } + } + + /* do we want to see an additionally hexdump ? */ + if (vflag> 1) + if(!print_unknown_data((u_int8_t *)lsap->lsa_un.un_unknown, + "\n\t ", ls_length)) { + return(ls_end); + } + + return (ls_end); +trunc: + return (NULL); +} + +static int +ospf_decode_lls(register const struct ospfhdr *op, + register u_int length) +{ + register const u_char *dptr; + register const u_char *dataend; + register u_int length2; + register u_int16_t lls_type, lls_len; + register u_int32_t lls_flags; + + switch (op->ospf_type) { + + case OSPF_TYPE_HELLO: + if (!(op->ospf_hello.hello_options & OSPF_OPTION_L)) + return (0); + break; + + case OSPF_TYPE_DD: + if (!(op->ospf_db.db_options & OSPF_OPTION_L)) + return (0); + break; + + default: + return (0); + } + + /* dig deeper if LLS data is available; see RFC4813 */ + length2 = EXTRACT_16BITS(&op->ospf_len); + dptr = (u_char *)op + length2; + dataend = (u_char *)op + length; + + if (EXTRACT_16BITS(&op->ospf_authtype) == OSPF_AUTH_MD5) { + dptr = dptr + op->ospf_authdata[3]; + length2 += op->ospf_authdata[3]; + } + if (length2 >= length) { + printf("\n\t[LLS truncated]"); + return (1); + } + TCHECK2(*dptr, 2); + printf("\n\t LLS: checksum: 0x%04x", (u_int)EXTRACT_16BITS(dptr)); + + dptr += 2; + TCHECK2(*dptr, 2); + length2 = EXTRACT_16BITS(dptr); + printf(", length: %u", length2); + + dptr += 2; + TCHECK(*dptr); + while (dptr < dataend) { + TCHECK2(*dptr, 2); + lls_type = EXTRACT_16BITS(dptr); + printf("\n\t %s (%u)", + tok2str(ospf_lls_tlv_values,"Unknown TLV",lls_type), + lls_type); + dptr += 2; + TCHECK2(*dptr, 2); + lls_len = EXTRACT_16BITS(dptr); + printf(", length: %u", lls_len); + dptr += 2; + switch (lls_type) { + + case OSPF_LLS_EO: + if (lls_len != 4) { + printf(" [should be 4]"); + lls_len = 4; + } + TCHECK2(*dptr, 4); + lls_flags = EXTRACT_32BITS(dptr); + printf("\n\t Options: 0x%08x [%s]", lls_flags, + bittok2str(ospf_lls_eo_options,"?",lls_flags)); + + break; + + case OSPF_LLS_MD5: + if (lls_len != 20) { + printf(" [should be 20]"); + lls_len = 20; + } + TCHECK2(*dptr, 4); + printf("\n\t Sequence number: 0x%08x", EXTRACT_32BITS(dptr)); + break; + } + + dptr += lls_len; + } + + return (0); +trunc: + return (1); +} + +static int +ospf_decode_v2(register const struct ospfhdr *op, + register const u_char *dataend) +{ + register const struct in_addr *ap; + register const struct lsr *lsrp; + register const struct lsa_hdr *lshp; + register const struct lsa *lsap; + register u_int32_t lsa_count,lsa_count_max; + + switch (op->ospf_type) { + + case OSPF_TYPE_UMD: + /* + * Rob Coltun's special monitoring packets; + * do nothing + */ + break; + + case OSPF_TYPE_HELLO: + printf("\n\tOptions [%s]", + bittok2str(ospf_option_values,"none",op->ospf_hello.hello_options)); + + TCHECK(op->ospf_hello.hello_deadint); + printf("\n\t Hello Timer %us, Dead Timer %us, Mask %s, Priority %u", + EXTRACT_16BITS(&op->ospf_hello.hello_helloint), + EXTRACT_32BITS(&op->ospf_hello.hello_deadint), + ipaddr_string(&op->ospf_hello.hello_mask), + op->ospf_hello.hello_priority); + + TCHECK(op->ospf_hello.hello_dr); + if (op->ospf_hello.hello_dr.s_addr != 0) + printf("\n\t Designated Router %s", + ipaddr_string(&op->ospf_hello.hello_dr)); + + TCHECK(op->ospf_hello.hello_bdr); + if (op->ospf_hello.hello_bdr.s_addr != 0) + printf(", Backup Designated Router %s", + ipaddr_string(&op->ospf_hello.hello_bdr)); + + ap = op->ospf_hello.hello_neighbor; + if ((u_char *)ap < dataend) + printf("\n\t Neighbor List:"); + while ((u_char *)ap < dataend) { + TCHECK(*ap); + printf("\n\t %s", ipaddr_string(ap)); + ++ap; + } + break; /* HELLO */ + + case OSPF_TYPE_DD: + TCHECK(op->ospf_db.db_options); + printf("\n\tOptions [%s]", + bittok2str(ospf_option_values,"none",op->ospf_db.db_options)); + TCHECK(op->ospf_db.db_flags); + printf(", DD Flags [%s]", + bittok2str(ospf_dd_flag_values,"none",op->ospf_db.db_flags)); + TCHECK(op->ospf_db.db_ifmtu); + if (op->ospf_db.db_ifmtu) { + printf(", MTU: %u", EXTRACT_16BITS(&op->ospf_db.db_ifmtu)); + } + TCHECK(op->ospf_db.db_seq); + printf(", Sequence: 0x%08x", EXTRACT_32BITS(&op->ospf_db.db_seq)); + + /* Print all the LS adv's */ + lshp = op->ospf_db.db_lshdr; + while (((u_char *)lshp < dataend) && ospf_print_lshdr(lshp) != -1) { + ++lshp; + } + break; + + case OSPF_TYPE_LS_REQ: + lsrp = op->ospf_lsr; + while ((u_char *)lsrp < dataend) { + TCHECK(*lsrp); + + printf("\n\t Advertising Router: %s, %s LSA (%u)", + ipaddr_string(&lsrp->ls_router), + tok2str(lsa_values,"unknown",EXTRACT_32BITS(lsrp->ls_type)), + EXTRACT_32BITS(&lsrp->ls_type)); + + switch (EXTRACT_32BITS(lsrp->ls_type)) { + /* the LSA header for opaque LSAs was slightly changed */ + case LS_TYPE_OPAQUE_LL: + case LS_TYPE_OPAQUE_AL: + case LS_TYPE_OPAQUE_DW: + printf(", Opaque-Type: %s LSA (%u), Opaque-ID: %u", + tok2str(lsa_opaque_values, "unknown",lsrp->un_ls_stateid.opaque_field.opaque_type), + lsrp->un_ls_stateid.opaque_field.opaque_type, + EXTRACT_24BITS(&lsrp->un_ls_stateid.opaque_field.opaque_id)); + break; + default: + printf(", LSA-ID: %s", + ipaddr_string(&lsrp->un_ls_stateid.ls_stateid)); + break; + } + + ++lsrp; + } + break; + + case OSPF_TYPE_LS_UPDATE: + lsap = op->ospf_lsu.lsu_lsa; + TCHECK(op->ospf_lsu.lsu_count); + lsa_count_max = EXTRACT_32BITS(&op->ospf_lsu.lsu_count); + printf(", %d LSA%s",lsa_count_max, PLURAL_SUFFIX(lsa_count_max)); + for (lsa_count=1;lsa_count <= lsa_count_max;lsa_count++) { + printf("\n\t LSA #%u",lsa_count); + lsap = (const struct lsa *)ospf_print_lsa(lsap); + if (lsap == NULL) + goto trunc; + } + break; + + case OSPF_TYPE_LS_ACK: + lshp = op->ospf_lsa.lsa_lshdr; + while (ospf_print_lshdr(lshp) != -1) { + ++lshp; + } + break; + + default: + break; + } + return (0); +trunc: + return (1); +} + +void +ospf_print(register const u_char *bp, register u_int length, + const u_char *bp2 _U_) +{ + register const struct ospfhdr *op; + register const u_char *dataend; + register const char *cp; + + op = (struct ospfhdr *)bp; + + /* XXX Before we do anything else, strip off the MD5 trailer */ + TCHECK(op->ospf_authtype); + if (EXTRACT_16BITS(&op->ospf_authtype) == OSPF_AUTH_MD5) { + length -= OSPF_AUTH_MD5_LEN; + snapend -= OSPF_AUTH_MD5_LEN; + } + + /* If the type is valid translate it, or just print the type */ + /* value. If it's not valid, say so and return */ + TCHECK(op->ospf_type); + cp = tok2str(type2str, "unknown LS-type", op->ospf_type); + printf("OSPFv%u, %s, length %u", + op->ospf_version, + cp, + length); + if (*cp == 'u') + return; + + if(!vflag) { /* non verbose - so lets bail out here */ + return; + } + + TCHECK(op->ospf_len); + if (length != EXTRACT_16BITS(&op->ospf_len)) { + printf(" [len %d]", EXTRACT_16BITS(&op->ospf_len)); + } + + if (length > EXTRACT_16BITS(&op->ospf_len)) { + dataend = bp + EXTRACT_16BITS(&op->ospf_len); + } else { + dataend = bp + length; + } + + TCHECK(op->ospf_routerid); + printf("\n\tRouter-ID %s", ipaddr_string(&op->ospf_routerid)); + + TCHECK(op->ospf_areaid); + if (op->ospf_areaid.s_addr != 0) + printf(", Area %s", ipaddr_string(&op->ospf_areaid)); + else + printf(", Backbone Area"); + + if (vflag) { + /* Print authentication data (should we really do this?) */ + TCHECK2(op->ospf_authdata[0], sizeof(op->ospf_authdata)); + + printf(", Authentication Type: %s (%u)", + tok2str(ospf_authtype_values,"unknown",EXTRACT_16BITS(&op->ospf_authtype)), + EXTRACT_16BITS(&op->ospf_authtype)); + + switch (EXTRACT_16BITS(&op->ospf_authtype)) { + + case OSPF_AUTH_NONE: + break; + + case OSPF_AUTH_SIMPLE: + printf("\n\tSimple text password: "); + safeputs((const char *)op->ospf_authdata, OSPF_AUTH_SIMPLE_LEN); + break; + + case OSPF_AUTH_MD5: + printf("\n\tKey-ID: %u, Auth-Length: %u, Crypto Sequence Number: 0x%08x", + *((op->ospf_authdata)+2), + *((op->ospf_authdata)+3), + EXTRACT_32BITS((op->ospf_authdata)+4)); + break; + + default: + return; + } + } + /* Do rest according to version. */ + switch (op->ospf_version) { + + case 2: + /* ospf version 2 */ + if (ospf_decode_v2(op, dataend)) + goto trunc; + if (length > EXTRACT_16BITS(&op->ospf_len)) { + if (ospf_decode_lls(op, length)) + goto trunc; + } + break; + + default: + printf(" ospf [version %d]", op->ospf_version); + break; + } /* end switch on version */ + + return; +trunc: + fputs(tstr, stdout); +} |