Local changes: - Update some local modifications to fix build - Synch config.h with upstream as much as possible Changelog: https://git.tcpdump.org/tcpdump/blob/55bc126b0216cfe409b8d6bd378f65679d136ddf:/CHANGES Reviewed by: emaste Obtained from: https://www.tcpdump.org/release/tcpdump-4.99.4.tar.gz Sponsored by: The FreeBSD Foundation
1003 lines
29 KiB
C
1003 lines
29 KiB
C
/*
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* Copyright (c) 1992, 1993, 1994, 1995, 1996, 1997
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* The Regents of the University of California. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that: (1) source code distributions
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* retain the above copyright notice and this paragraph in its entirety, (2)
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* distributions including binary code include the above copyright notice and
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* this paragraph in its entirety in the documentation or other materials
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* provided with the distribution, and (3) all advertising materials mentioning
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* features or use of this software display the following acknowledgement:
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* ``This product includes software developed by the University of California,
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* Lawrence Berkeley Laboratory and its contributors.'' Neither the name of
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* the University nor the names of its contributors may be used to endorse
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* or promote products derived from this software without specific prior
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* written permission.
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* THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR IMPLIED
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* WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
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*
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* OSPF support contributed by Jeffrey Honig (jch@mitchell.cit.cornell.edu)
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*/
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/* \summary: IPv6 Open Shortest Path First (OSPFv3) printer */
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#ifdef HAVE_CONFIG_H
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#include <config.h>
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#endif
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#include "netdissect-stdinc.h"
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#include <string.h>
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#include "netdissect.h"
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#include "addrtoname.h"
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#include "extract.h"
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#include "ospf.h"
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#define OSPF_TYPE_HELLO 1 /* Hello */
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#define OSPF_TYPE_DD 2 /* Database Description */
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#define OSPF_TYPE_LS_REQ 3 /* Link State Request */
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#define OSPF_TYPE_LS_UPDATE 4 /* Link State Update */
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#define OSPF_TYPE_LS_ACK 5 /* Link State Ack */
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/* Options *_options */
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#define OSPF6_OPTION_V6 0x01 /* V6 bit: A bit for peeping tom */
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#define OSPF6_OPTION_E 0x02 /* E bit: External routes advertised */
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#define OSPF6_OPTION_MC 0x04 /* MC bit: Multicast capable */
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#define OSPF6_OPTION_N 0x08 /* N bit: For type-7 LSA */
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#define OSPF6_OPTION_R 0x10 /* R bit: Router bit */
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#define OSPF6_OPTION_DC 0x20 /* DC bit: Demand circuits */
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/* The field is actually 24-bit (RFC5340 Section A.2). */
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#define OSPF6_OPTION_AF 0x0100 /* AF bit: Multiple address families */
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#define OSPF6_OPTION_L 0x0200 /* L bit: Link-local signaling (LLS) */
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#define OSPF6_OPTION_AT 0x0400 /* AT bit: Authentication trailer */
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/* db_flags */
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#define OSPF6_DB_INIT 0x04 /* */
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#define OSPF6_DB_MORE 0x02
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#define OSPF6_DB_MASTER 0x01
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#define OSPF6_DB_M6 0x10 /* IPv6 MTU */
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/* ls_type */
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#define LS_TYPE_ROUTER 1 /* router link */
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#define LS_TYPE_NETWORK 2 /* network link */
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#define LS_TYPE_INTER_AP 3 /* Inter-Area-Prefix */
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#define LS_TYPE_INTER_AR 4 /* Inter-Area-Router */
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#define LS_TYPE_ASE 5 /* ASE */
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#define LS_TYPE_GROUP 6 /* Group membership */
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#define LS_TYPE_NSSA 7 /* NSSA */
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#define LS_TYPE_LINK 8 /* Link LSA */
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#define LS_TYPE_INTRA_AP 9 /* Intra-Area-Prefix */
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#define LS_TYPE_INTRA_ATE 10 /* Intra-Area-TE */
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#define LS_TYPE_GRACE 11 /* Grace LSA */
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#define LS_TYPE_RI 12 /* Router information */
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#define LS_TYPE_INTER_ASTE 13 /* Inter-AS-TE */
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#define LS_TYPE_L1VPN 14 /* L1VPN */
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#define LS_TYPE_MASK 0x1fff
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#define LS_SCOPE_LINKLOCAL 0x0000
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#define LS_SCOPE_AREA 0x2000
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#define LS_SCOPE_AS 0x4000
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#define LS_SCOPE_MASK 0x6000
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#define LS_SCOPE_U 0x8000
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/* rla_link.link_type */
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#define RLA_TYPE_ROUTER 1 /* point-to-point to another router */
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#define RLA_TYPE_TRANSIT 2 /* connection to transit network */
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#define RLA_TYPE_VIRTUAL 4 /* virtual link */
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/* rla_flags */
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#define RLA_FLAG_B 0x01
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#define RLA_FLAG_E 0x02
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#define RLA_FLAG_V 0x04
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#define RLA_FLAG_W 0x08
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#define RLA_FLAG_Nt 0x10
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/* lsa_prefix options */
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#define LSA_PREFIX_OPT_NU 0x01
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#define LSA_PREFIX_OPT_LA 0x02
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#define LSA_PREFIX_OPT_MC 0x04
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#define LSA_PREFIX_OPT_P 0x08
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#define LSA_PREFIX_OPT_DN 0x10
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#define LSA_PREFIX_OPT_N 0x20
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/* sla_tosmetric breakdown */
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#define SLA_MASK_TOS 0x7f000000
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#define SLA_MASK_METRIC 0x00ffffff
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#define SLA_SHIFT_TOS 24
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/* asla_metric */
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#define ASLA_FLAG_FWDADDR 0x02000000
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#define ASLA_FLAG_ROUTETAG 0x01000000
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#define ASLA_MASK_METRIC 0x00ffffff
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/* RFC6506 Section 4.1 */
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#define OSPF6_AT_HDRLEN 16U
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#define OSPF6_AUTH_TYPE_HMAC 0x0001
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typedef nd_uint32_t rtrid_t;
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/* link state advertisement header */
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struct lsa6_hdr {
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nd_uint16_t ls_age;
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nd_uint16_t ls_type;
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rtrid_t ls_stateid;
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rtrid_t ls_router;
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nd_uint32_t ls_seq;
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nd_uint16_t ls_chksum;
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nd_uint16_t ls_length;
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};
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/* Length of an IPv6 address, in bytes. */
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#define IPV6_ADDR_LEN_BYTES (128/8)
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struct lsa6_prefix {
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nd_uint8_t lsa_p_len;
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nd_uint8_t lsa_p_opt;
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nd_uint16_t lsa_p_metric;
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nd_byte lsa_p_prefix[IPV6_ADDR_LEN_BYTES]; /* maximum length */
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};
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/* link state advertisement */
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struct lsa6 {
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struct lsa6_hdr ls_hdr;
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/* Link state types */
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union {
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/* Router links advertisements */
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struct {
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union {
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nd_uint8_t flg;
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nd_uint32_t opt;
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} rla_flgandopt;
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#define rla_flags rla_flgandopt.flg
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#define rla_options rla_flgandopt.opt
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struct rlalink6 {
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nd_uint8_t link_type;
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nd_byte link_zero;
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nd_uint16_t link_metric;
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nd_uint32_t link_ifid;
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nd_uint32_t link_nifid;
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rtrid_t link_nrtid;
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} rla_link[1]; /* may repeat */
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} un_rla;
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/* Network links advertisements */
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struct {
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nd_uint32_t nla_options;
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rtrid_t nla_router[1]; /* may repeat */
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} un_nla;
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/* Inter Area Prefix LSA */
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struct {
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nd_uint32_t inter_ap_metric;
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struct lsa6_prefix inter_ap_prefix[1];
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} un_inter_ap;
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/* AS external links advertisements */
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struct {
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nd_uint32_t asla_metric;
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struct lsa6_prefix asla_prefix[1];
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/* some optional fields follow */
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} un_asla;
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#if 0
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/* Summary links advertisements */
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struct {
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nd_ipv4 sla_mask;
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nd_uint32_t sla_tosmetric[1]; /* may repeat */
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} un_sla;
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/* Multicast group membership */
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struct mcla {
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nd_uint32_t mcla_vtype;
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nd_ipv4 mcla_vid;
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} un_mcla[1];
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#endif
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/* Type 7 LSA */
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/* Link LSA */
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struct llsa {
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union {
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nd_uint8_t pri;
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nd_uint32_t opt;
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} llsa_priandopt;
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#define llsa_priority llsa_priandopt.pri
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#define llsa_options llsa_priandopt.opt
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nd_ipv6 llsa_lladdr;
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nd_uint32_t llsa_nprefix;
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struct lsa6_prefix llsa_prefix[1];
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} un_llsa;
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/* Intra-Area-Prefix */
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struct {
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nd_uint16_t intra_ap_nprefix;
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nd_uint16_t intra_ap_lstype;
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rtrid_t intra_ap_lsid;
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rtrid_t intra_ap_rtid;
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struct lsa6_prefix intra_ap_prefix[1];
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} un_intra_ap;
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} lsa_un;
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};
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/*
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* the main header
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*/
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struct ospf6hdr {
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nd_uint8_t ospf6_version;
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nd_uint8_t ospf6_type;
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nd_uint16_t ospf6_len;
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rtrid_t ospf6_routerid;
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rtrid_t ospf6_areaid;
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nd_uint16_t ospf6_chksum;
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nd_uint8_t ospf6_instanceid;
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nd_uint8_t ospf6_rsvd;
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};
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/*
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* The OSPF6 header length is 16 bytes, regardless of how your compiler
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* might choose to pad the above structure.
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*/
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#define OSPF6HDR_LEN 16
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/* Hello packet */
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struct hello6 {
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nd_uint32_t hello_ifid;
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union {
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nd_uint8_t pri;
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nd_uint32_t opt;
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} hello_priandopt;
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#define hello_priority hello_priandopt.pri
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#define hello_options hello_priandopt.opt
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nd_uint16_t hello_helloint;
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nd_uint16_t hello_deadint;
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rtrid_t hello_dr;
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rtrid_t hello_bdr;
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rtrid_t hello_neighbor[1]; /* may repeat */
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};
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/* Database Description packet */
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struct dd6 {
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nd_uint32_t db_options;
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nd_uint16_t db_mtu;
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nd_uint8_t db_mbz;
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nd_uint8_t db_flags;
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nd_uint32_t db_seq;
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struct lsa6_hdr db_lshdr[1]; /* may repeat */
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};
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/* Link State Request */
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struct lsr6 {
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nd_uint16_t ls_mbz;
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nd_uint16_t ls_type;
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rtrid_t ls_stateid;
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rtrid_t ls_router;
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};
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/* Link State Update */
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struct lsu6 {
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nd_uint32_t lsu_count;
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struct lsa6 lsu_lsa[1]; /* may repeat */
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};
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static const struct tok ospf6_option_values[] = {
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{ OSPF6_OPTION_V6, "V6" },
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{ OSPF6_OPTION_E, "External" },
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{ OSPF6_OPTION_MC, "Deprecated" },
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{ OSPF6_OPTION_N, "NSSA" },
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{ OSPF6_OPTION_R, "Router" },
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{ OSPF6_OPTION_DC, "Demand Circuit" },
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{ OSPF6_OPTION_AF, "AFs Support" },
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{ OSPF6_OPTION_L, "LLS" },
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{ OSPF6_OPTION_AT, "Authentication Trailer" },
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{ 0, NULL }
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};
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static const struct tok ospf6_rla_flag_values[] = {
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{ RLA_FLAG_B, "ABR" },
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{ RLA_FLAG_E, "External" },
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{ RLA_FLAG_V, "Virtual-Link Endpoint" },
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{ RLA_FLAG_W, "Deprecated" },
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{ RLA_FLAG_Nt, "NSSA Translator" },
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{ 0, NULL }
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};
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static const struct tok ospf6_asla_flag_values[] = {
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{ ASLA_FLAG_EXTERNAL, "External Type 2" },
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{ ASLA_FLAG_FWDADDR, "Forwarding" },
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{ ASLA_FLAG_ROUTETAG, "Tag" },
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{ 0, NULL }
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};
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static const struct tok ospf6_type_values[] = {
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{ OSPF_TYPE_HELLO, "Hello" },
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{ OSPF_TYPE_DD, "Database Description" },
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{ OSPF_TYPE_LS_REQ, "LS-Request" },
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{ OSPF_TYPE_LS_UPDATE, "LS-Update" },
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{ OSPF_TYPE_LS_ACK, "LS-Ack" },
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{ 0, NULL }
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};
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static const struct tok ospf6_lsa_values[] = {
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{ LS_TYPE_ROUTER, "Router" },
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{ LS_TYPE_NETWORK, "Network" },
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{ LS_TYPE_INTER_AP, "Inter-Area Prefix" },
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{ LS_TYPE_INTER_AR, "Inter-Area Router" },
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{ LS_TYPE_ASE, "External" },
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{ LS_TYPE_GROUP, "Deprecated" },
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{ LS_TYPE_NSSA, "NSSA" },
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{ LS_TYPE_LINK, "Link" },
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{ LS_TYPE_INTRA_AP, "Intra-Area Prefix" },
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{ LS_TYPE_INTRA_ATE, "Intra-Area TE" },
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{ LS_TYPE_GRACE, "Grace" },
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{ LS_TYPE_RI, "Router Information" },
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{ LS_TYPE_INTER_ASTE, "Inter-AS-TE" },
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{ LS_TYPE_L1VPN, "Layer 1 VPN" },
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{ 0, NULL }
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};
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static const struct tok ospf6_ls_scope_values[] = {
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{ LS_SCOPE_LINKLOCAL, "Link Local" },
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{ LS_SCOPE_AREA, "Area Local" },
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{ LS_SCOPE_AS, "Domain Wide" },
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{ 0, NULL }
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};
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static const struct tok ospf6_dd_flag_values[] = {
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{ OSPF6_DB_INIT, "Init" },
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{ OSPF6_DB_MORE, "More" },
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{ OSPF6_DB_MASTER, "Master" },
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{ OSPF6_DB_M6, "IPv6 MTU" },
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{ 0, NULL }
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};
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static const struct tok ospf6_lsa_prefix_option_values[] = {
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{ LSA_PREFIX_OPT_NU, "No Unicast" },
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{ LSA_PREFIX_OPT_LA, "Local address" },
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{ LSA_PREFIX_OPT_MC, "Deprecated" },
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{ LSA_PREFIX_OPT_P, "Propagate" },
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{ LSA_PREFIX_OPT_DN, "Down" },
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{ LSA_PREFIX_OPT_N, "N-bit" },
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{ 0, NULL }
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};
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static const struct tok ospf6_auth_type_str[] = {
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{ OSPF6_AUTH_TYPE_HMAC, "HMAC" },
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{ 0, NULL }
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};
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static void
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ospf6_print_ls_type(netdissect_options *ndo,
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u_int ls_type, const rtrid_t *ls_stateid)
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{
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ND_PRINT("\n\t %s LSA (%u), %s Scope%s, LSA-ID %s",
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tok2str(ospf6_lsa_values, "Unknown", ls_type & LS_TYPE_MASK),
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ls_type & LS_TYPE_MASK,
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tok2str(ospf6_ls_scope_values, "Unknown", ls_type & LS_SCOPE_MASK),
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ls_type &0x8000 ? ", transitive" : "", /* U-bit */
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GET_IPADDR_STRING(ls_stateid));
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}
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static int
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ospf6_print_lshdr(netdissect_options *ndo,
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const struct lsa6_hdr *lshp, const u_char *dataend)
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{
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if ((const u_char *)(lshp + 1) > dataend)
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goto trunc;
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ND_PRINT("\n\t Advertising Router %s, seq 0x%08x, age %us, length %zu",
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GET_IPADDR_STRING(lshp->ls_router),
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GET_BE_U_4(lshp->ls_seq),
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GET_BE_U_2(lshp->ls_age),
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GET_BE_U_2(lshp->ls_length)-sizeof(struct lsa6_hdr));
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ospf6_print_ls_type(ndo, GET_BE_U_2(lshp->ls_type),
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&lshp->ls_stateid);
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return (0);
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trunc:
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return (1);
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}
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|
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static int
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ospf6_print_lsaprefix(netdissect_options *ndo,
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const uint8_t *tptr, u_int lsa_length)
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{
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const struct lsa6_prefix *lsapp = (const struct lsa6_prefix *)tptr;
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u_int wordlen;
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nd_ipv6 prefix;
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|
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if (lsa_length < sizeof (*lsapp) - IPV6_ADDR_LEN_BYTES)
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goto trunc;
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lsa_length -= sizeof (*lsapp) - IPV6_ADDR_LEN_BYTES;
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ND_TCHECK_LEN(lsapp, sizeof(*lsapp) - IPV6_ADDR_LEN_BYTES);
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wordlen = (GET_U_1(lsapp->lsa_p_len) + 31) / 32;
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if (wordlen * 4 > sizeof(nd_ipv6)) {
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ND_PRINT(" bogus prefixlen /%u", GET_U_1(lsapp->lsa_p_len));
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goto trunc;
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}
|
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if (lsa_length < wordlen * 4)
|
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goto trunc;
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lsa_length -= wordlen * 4;
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memset(prefix, 0, sizeof(prefix));
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GET_CPY_BYTES(prefix, lsapp->lsa_p_prefix, wordlen * 4);
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ND_PRINT("\n\t\t%s/%u", ip6addr_string(ndo, prefix), /* local buffer, not packet data; don't use GET_IP6ADDR_STRING() */
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GET_U_1(lsapp->lsa_p_len));
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if (GET_U_1(lsapp->lsa_p_opt)) {
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ND_PRINT(", Options [%s]",
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bittok2str(ospf6_lsa_prefix_option_values,
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"none", GET_U_1(lsapp->lsa_p_opt)));
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}
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ND_PRINT(", metric %u", GET_BE_U_2(lsapp->lsa_p_metric));
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return sizeof(*lsapp) - IPV6_ADDR_LEN_BYTES + wordlen * 4;
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|
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trunc:
|
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return -1;
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}
|
|
|
|
|
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/*
|
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* Print a single link state advertisement. If truncated return 1, else 0.
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*/
|
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static int
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ospf6_print_lsa(netdissect_options *ndo,
|
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const struct lsa6 *lsap, const u_char *dataend)
|
|
{
|
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const struct rlalink6 *rlp;
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|
#if 0
|
|
const struct tos_metric *tosp;
|
|
#endif
|
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const rtrid_t *ap;
|
|
#if 0
|
|
const struct aslametric *almp;
|
|
const struct mcla *mcp;
|
|
#endif
|
|
const struct llsa *llsap;
|
|
const struct lsa6_prefix *lsapp;
|
|
#if 0
|
|
const uint32_t *lp;
|
|
#endif
|
|
u_int prefixes;
|
|
int bytelen;
|
|
u_int length, lsa_length;
|
|
uint32_t flags32;
|
|
const uint8_t *tptr;
|
|
|
|
if (ospf6_print_lshdr(ndo, &lsap->ls_hdr, dataend))
|
|
return (1);
|
|
length = GET_BE_U_2(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 (GET_BE_U_2(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_PRINT("\n\t Options [%s]",
|
|
bittok2str(ospf6_option_values, "none",
|
|
GET_BE_U_4(lsap->lsa_un.un_rla.rla_options)));
|
|
ND_PRINT(", RLA-Flags [%s]",
|
|
bittok2str(ospf6_rla_flag_values, "none",
|
|
GET_U_1(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_SIZE(rlp);
|
|
switch (GET_U_1(rlp->link_type)) {
|
|
|
|
case RLA_TYPE_VIRTUAL:
|
|
ND_PRINT("\n\t Virtual Link: Neighbor Router-ID %s"
|
|
"\n\t Neighbor Interface-ID %s, Interface %s",
|
|
GET_IPADDR_STRING(rlp->link_nrtid),
|
|
GET_IPADDR_STRING(rlp->link_nifid),
|
|
GET_IPADDR_STRING(rlp->link_ifid));
|
|
break;
|
|
|
|
case RLA_TYPE_ROUTER:
|
|
ND_PRINT("\n\t Neighbor Router-ID %s"
|
|
"\n\t Neighbor Interface-ID %s, Interface %s",
|
|
GET_IPADDR_STRING(rlp->link_nrtid),
|
|
GET_IPADDR_STRING(rlp->link_nifid),
|
|
GET_IPADDR_STRING(rlp->link_ifid));
|
|
break;
|
|
|
|
case RLA_TYPE_TRANSIT:
|
|
ND_PRINT("\n\t Neighbor Network-ID %s"
|
|
"\n\t Neighbor Interface-ID %s, Interface %s",
|
|
GET_IPADDR_STRING(rlp->link_nrtid),
|
|
GET_IPADDR_STRING(rlp->link_nifid),
|
|
GET_IPADDR_STRING(rlp->link_ifid));
|
|
break;
|
|
|
|
default:
|
|
ND_PRINT("\n\t Unknown Router Links Type 0x%02x",
|
|
GET_U_1(rlp->link_type));
|
|
return (0);
|
|
}
|
|
ND_PRINT(", metric %u", GET_BE_U_2(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_PRINT("\n\t Options [%s]",
|
|
bittok2str(ospf6_option_values, "none",
|
|
GET_BE_U_4(lsap->lsa_un.un_nla.nla_options)));
|
|
|
|
ND_PRINT("\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_PRINT("\n\t\t%s", GET_IPADDR_STRING(ap));
|
|
++ap;
|
|
}
|
|
break;
|
|
|
|
case LS_TYPE_INTER_AP | LS_SCOPE_AREA:
|
|
if (lsa_length < sizeof (lsap->lsa_un.un_inter_ap.inter_ap_metric))
|
|
return (1);
|
|
lsa_length -= sizeof (lsap->lsa_un.un_inter_ap.inter_ap_metric);
|
|
ND_PRINT(", metric %u",
|
|
GET_BE_U_4(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;
|
|
/*
|
|
* ospf6_print_lsaprefix() will return -1 if
|
|
* the length is too high, so this will not
|
|
* underflow.
|
|
*/
|
|
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);
|
|
flags32 = GET_BE_U_4(lsap->lsa_un.un_asla.asla_metric);
|
|
ND_PRINT("\n\t Flags [%s]",
|
|
bittok2str(ospf6_asla_flag_values, "none", flags32));
|
|
ND_PRINT(" metric %u",
|
|
GET_BE_U_4(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;
|
|
/*
|
|
* ospf6_print_lsaprefix() will return -1 if
|
|
* the length is too high, so this will not
|
|
* underflow.
|
|
*/
|
|
lsa_length -= bytelen;
|
|
tptr += bytelen;
|
|
|
|
if ((flags32 & ASLA_FLAG_FWDADDR) != 0) {
|
|
if (lsa_length < sizeof (nd_ipv6))
|
|
return (1);
|
|
lsa_length -= sizeof (nd_ipv6);
|
|
ND_PRINT(" forward %s",
|
|
GET_IP6ADDR_STRING(tptr));
|
|
tptr += sizeof(nd_ipv6);
|
|
}
|
|
|
|
if ((flags32 & ASLA_FLAG_ROUTETAG) != 0) {
|
|
if (lsa_length < sizeof (uint32_t))
|
|
return (1);
|
|
lsa_length -= sizeof (uint32_t);
|
|
ND_PRINT(" tag %s",
|
|
GET_IPADDR_STRING(tptr));
|
|
tptr += sizeof(uint32_t);
|
|
}
|
|
|
|
if (GET_U_1(lsapp->lsa_p_metric)) {
|
|
if (lsa_length < sizeof (uint32_t))
|
|
return (1);
|
|
lsa_length -= sizeof (uint32_t);
|
|
ND_PRINT(" RefLSID: %s",
|
|
GET_IPADDR_STRING(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_SIZE(&llsap->llsa_priandopt);
|
|
ND_PRINT("\n\t Options [%s]",
|
|
bittok2str(ospf6_option_values, "none",
|
|
GET_BE_U_4(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 = GET_BE_U_4(llsap->llsa_nprefix);
|
|
ND_PRINT("\n\t Priority %u, Link-local address %s, Prefixes %u:",
|
|
GET_U_1(llsap->llsa_priority),
|
|
GET_IP6ADDR_STRING(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--;
|
|
/*
|
|
* ospf6_print_lsaprefix() will return -1 if
|
|
* the length is too high, so this will not
|
|
* underflow.
|
|
*/
|
|
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_4(lsap->lsa_un.un_intra_ap.intra_ap_rtid);
|
|
ospf6_print_ls_type(ndo,
|
|
GET_BE_U_2(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);
|
|
prefixes = GET_BE_U_2(lsap->lsa_un.un_intra_ap.intra_ap_nprefix);
|
|
ND_PRINT("\n\t Prefixes %u:", 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--;
|
|
/*
|
|
* ospf6_print_lsaprefix() will return -1 if
|
|
* the length is too high, so this will not
|
|
* underflow.
|
|
*/
|
|
lsa_length -= bytelen;
|
|
tptr += bytelen;
|
|
}
|
|
break;
|
|
|
|
case LS_TYPE_GRACE | LS_SCOPE_LINKLOCAL:
|
|
if (ospf_grace_lsa_print(ndo, tptr, lsa_length) == -1) {
|
|
return 1;
|
|
}
|
|
break;
|
|
|
|
case LS_TYPE_INTRA_ATE | LS_SCOPE_LINKLOCAL:
|
|
if (ospf_te_lsa_print(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,
|
|
const struct ospf6hdr *op,
|
|
const u_char *dataend)
|
|
{
|
|
const rtrid_t *ap;
|
|
const struct lsr6 *lsrp;
|
|
const struct lsa6_hdr *lshp;
|
|
const struct lsa6 *lsap;
|
|
int i;
|
|
|
|
switch (GET_U_1(op->ospf6_type)) {
|
|
|
|
case OSPF_TYPE_HELLO: {
|
|
const struct hello6 *hellop = (const struct hello6 *)((const uint8_t *)op + OSPF6HDR_LEN);
|
|
|
|
ND_PRINT("\n\tOptions [%s]",
|
|
bittok2str(ospf6_option_values, "none",
|
|
GET_BE_U_4(hellop->hello_options)));
|
|
|
|
ND_PRINT("\n\t Hello Timer %us, Dead Timer %us, Interface-ID %s, Priority %u",
|
|
GET_BE_U_2(hellop->hello_helloint),
|
|
GET_BE_U_2(hellop->hello_deadint),
|
|
GET_IPADDR_STRING(hellop->hello_ifid),
|
|
GET_U_1(hellop->hello_priority));
|
|
|
|
if (GET_BE_U_4(hellop->hello_dr) != 0)
|
|
ND_PRINT("\n\t Designated Router %s",
|
|
GET_IPADDR_STRING(hellop->hello_dr));
|
|
if (GET_BE_U_4(hellop->hello_bdr) != 0)
|
|
ND_PRINT(", Backup Designated Router %s",
|
|
GET_IPADDR_STRING(hellop->hello_bdr));
|
|
if (ndo->ndo_vflag > 1) {
|
|
ND_PRINT("\n\t Neighbor List:");
|
|
ap = hellop->hello_neighbor;
|
|
while ((const u_char *)ap < dataend) {
|
|
ND_PRINT("\n\t %s", GET_IPADDR_STRING(ap));
|
|
++ap;
|
|
}
|
|
}
|
|
break; /* HELLO */
|
|
}
|
|
|
|
case OSPF_TYPE_DD: {
|
|
const struct dd6 *ddp = (const struct dd6 *)((const uint8_t *)op + OSPF6HDR_LEN);
|
|
|
|
ND_PRINT("\n\tOptions [%s]",
|
|
bittok2str(ospf6_option_values, "none",
|
|
GET_BE_U_4(ddp->db_options)));
|
|
ND_PRINT(", DD Flags [%s]",
|
|
bittok2str(ospf6_dd_flag_values,"none",GET_U_1(ddp->db_flags)));
|
|
|
|
ND_PRINT(", MTU %u, DD-Sequence 0x%08x",
|
|
GET_BE_U_2(ddp->db_mtu),
|
|
GET_BE_U_4(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_SIZE(lsrp);
|
|
ND_PRINT("\n\t Advertising Router %s",
|
|
GET_IPADDR_STRING(lsrp->ls_router));
|
|
ospf6_print_ls_type(ndo,
|
|
GET_BE_U_2(lsrp->ls_type),
|
|
&lsrp->ls_stateid);
|
|
++lsrp;
|
|
}
|
|
}
|
|
break;
|
|
|
|
case OSPF_TYPE_LS_UPDATE:
|
|
if (ndo->ndo_vflag > 1) {
|
|
const struct lsu6 *lsup = (const struct lsu6 *)((const uint8_t *)op + OSPF6HDR_LEN);
|
|
|
|
i = GET_BE_U_4(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 +
|
|
GET_BE_U_2(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_PRINT("\n\tLLS Checksum 0x%04x", GET_BE_U_2(cp));
|
|
cp += 2;
|
|
/* LLS Data Length */
|
|
llsdatalen = GET_BE_U_2(cp);
|
|
ND_PRINT(", Data Length %u", llsdatalen);
|
|
if (llsdatalen < OSPF_LLS_HDRLEN || llsdatalen > len)
|
|
goto trunc;
|
|
cp += 2;
|
|
/* LLS TLVs */
|
|
ND_TCHECK_LEN(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_PRINT("\n\tAuthentication Type %s",
|
|
tok2str(ospf6_auth_type_str, "unknown (0x%04x)", GET_BE_U_2(cp)));
|
|
cp += 2;
|
|
/* Auth Data Len */
|
|
authdatalen = GET_BE_U_2(cp);
|
|
ND_PRINT(", Length %u", authdatalen);
|
|
if (authdatalen < OSPF6_AT_HDRLEN || authdatalen > len)
|
|
goto trunc;
|
|
cp += 2;
|
|
/* Reserved */
|
|
cp += 2;
|
|
/* Security Association ID */
|
|
ND_PRINT(", SAID %u", GET_BE_U_2(cp));
|
|
cp += 2;
|
|
/* Cryptographic Sequence Number (High-Order 32 Bits) */
|
|
ND_PRINT(", CSN 0x%08x", GET_BE_U_4(cp));
|
|
cp += 4;
|
|
/* Cryptographic Sequence Number (Low-Order 32 Bits) */
|
|
ND_PRINT(":%08x", GET_BE_U_4(cp));
|
|
cp += 4;
|
|
/* Authentication Data */
|
|
ND_TCHECK_LEN(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)
|
|
{
|
|
uint8_t type;
|
|
int llslen = 0;
|
|
int lls_hello = 0;
|
|
int lls_dd = 0;
|
|
|
|
type = GET_U_1(op->ospf6_type);
|
|
if (type == OSPF_TYPE_HELLO) {
|
|
const struct hello6 *hellop = (const struct hello6 *)((const uint8_t *)op + OSPF6HDR_LEN);
|
|
if (GET_BE_U_4(hellop->hello_options) & OSPF6_OPTION_L)
|
|
lls_hello = 1;
|
|
} else if (type == OSPF_TYPE_DD) {
|
|
const struct dd6 *ddp = (const struct dd6 *)((const uint8_t *)op + OSPF6HDR_LEN);
|
|
if (GET_BE_U_4(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,
|
|
const u_char *bp, u_int length)
|
|
{
|
|
const struct ospf6hdr *op;
|
|
const u_char *dataend;
|
|
const char *cp;
|
|
uint16_t datalen;
|
|
|
|
ndo->ndo_protocol = "ospf3";
|
|
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 */
|
|
cp = tok2str(ospf6_type_values, "unknown packet type (%u)",
|
|
GET_U_1(op->ospf6_type));
|
|
ND_PRINT("OSPFv%u, %s, length %u", GET_U_1(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. */
|
|
datalen = GET_BE_U_2(op->ospf6_len);
|
|
if (datalen > length) {
|
|
ND_PRINT(" [len %u]", datalen);
|
|
return;
|
|
}
|
|
dataend = bp + datalen;
|
|
|
|
ND_PRINT("\n\tRouter-ID %s", GET_IPADDR_STRING(op->ospf6_routerid));
|
|
|
|
if (GET_BE_U_4(op->ospf6_areaid) != 0)
|
|
ND_PRINT(", Area %s", GET_IPADDR_STRING(op->ospf6_areaid));
|
|
else
|
|
ND_PRINT(", Backbone Area");
|
|
if (GET_U_1(op->ospf6_instanceid))
|
|
ND_PRINT(", Instance %u", GET_U_1(op->ospf6_instanceid));
|
|
|
|
/* Do rest according to version. */
|
|
switch (GET_U_1(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_trunc(ndo);
|
|
}
|