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fcc82f451d
compile with Sun C, as "interface.h" isn't being included before the structures are being declared. Furthermore, in the files that Sun C *can* compile, it doesn't cause Sun C to generate code that's safe with unaligned accesses, as "__attribute__" is defined as a do-nothing macro with compilers that don't support it. Therefore, we get rid of that tag on the structures to which it was added, and instead use "EXTRACT_16BIT()" and "EXTRACT_32BIT()" to fetch 16-bit and 32-bit big-endian quantities from packets. We also fix some other references to multi-byte quantities to get rid of code that tries to do unaligned loads on platforms that don't support them. We also throw in a hack that makes those macros use "__attribute__((packed))" on structures containing only one 16-bit or 32-bit integer to get the compiler to generate unaligned-safe code rather than doing it by hand. (GCC on SPARC produces the same code that doing it by hand does; I don't know if GCC on any other big-endian strict-alignment processor generates better code for that case. On little-endian processors, as "ntohs()" and "ntohl()" might be functions, that might actually produce worse code.) Fix some places to use "%u" rather than "%d" to print unsigned quantities.
251 lines
7.2 KiB
C
251 lines
7.2 KiB
C
/* @(#) $Header: /tcpdump/master/tcpdump/ospf.h,v 1.7 2002-12-11 07:13:56 guy Exp $ (LBL) */
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/*
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* Copyright (c) 1991, 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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#define OSPF_TYPE_UMD 0 /* UMd's special monitoring packets */
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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 field
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*
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* +------------------------------------+
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* | * | O | DC | EA | N/P | MC | E | T |
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* +------------------------------------+
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*
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*/
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#define OSPF_OPTION_T 0x01 /* T bit: TOS support */
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#define OSPF_OPTION_E 0x02 /* E bit: External routes advertised */
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#define OSPF_OPTION_MC 0x04 /* MC bit: Multicast capable */
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#define OSPF_OPTION_NP 0x08 /* N/P bit: NSSA capable */
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#define OSPF_OPTION_EA 0x10 /* EA bit: External Attribute capable */
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#define OSPF_OPTION_DC 0x20 /* DC bit: Demand circuit capable */
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#define OSPF_OPTION_O 0x40 /* O bit: Opaque LSA capable */
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/* ospf_authtype */
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#define OSPF_AUTH_NONE 0 /* No auth-data */
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#define OSPF_AUTH_SIMPLE 1 /* Simple password */
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#define OSPF_AUTH_MD5 2 /* MD5 authentication */
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#define OSPF_AUTH_MD5_LEN 16 /* length of MD5 authentication */
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/* db_flags */
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#define OSPF_DB_INIT 0x04 /* */
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#define OSPF_DB_MORE 0x02
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#define OSPF_DB_MASTER 0x01
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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_SUM_IP 3 /* summary link */
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#define LS_TYPE_SUM_ABR 4 /* summary area link */
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#define LS_TYPE_ASE 5 /* ASE */
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#define LS_TYPE_GROUP 6 /* Group membership (multicast */
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/* extensions 23 July 1991) */
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#define LS_TYPE_NSSA 7 /* rfc1587 - Not so Stubby Areas */
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#define LS_TYPE_OPAQUE_LL 9 /* rfc2370 - Opaque Link Local */
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#define LS_TYPE_OPAQUE_AL 10 /* rfc2370 - Opaque Link Local */
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#define LS_TYPE_OPAQUE_DW 11 /* rfc2370 - Opaque Domain Wide */
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/*************************************************
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*
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* is the above a bug in the documentation?
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*
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*************************************************/
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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_STUB 3 /* connection to stub 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_W1 0x04
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#define RLA_FLAG_W2 0x08
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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_tosmetric breakdown */
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#define ASLA_FLAG_EXTERNAL 0x80000000
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#define ASLA_MASK_TOS 0x7f000000
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#define ASLA_SHIFT_TOS 24
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#define ASLA_MASK_METRIC 0x00ffffff
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/* multicast vertex type */
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#define MCLA_VERTEX_ROUTER 1
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#define MCLA_VERTEX_NETWORK 2
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/* link state advertisement header */
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struct lsa_hdr {
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u_int16_t ls_age;
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u_int8_t ls_options;
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u_int8_t ls_type;
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struct in_addr ls_stateid;
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struct in_addr ls_router;
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u_int32_t ls_seq;
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u_int16_t ls_chksum;
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u_int16_t ls_length;
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};
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/* link state advertisement */
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struct lsa {
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struct lsa_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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u_int8_t rla_flags;
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u_int8_t rla_zero[1];
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u_int16_t rla_count;
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struct rlalink {
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struct in_addr link_id;
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struct in_addr link_data;
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u_int8_t link_type;
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u_int8_t link_toscount;
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u_int16_t link_tos0metric;
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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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struct in_addr nla_mask;
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struct in_addr nla_router[1]; /* may repeat */
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} un_nla;
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/* Summary links advertisements */
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struct {
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struct in_addr sla_mask;
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u_int32_t sla_tosmetric[1]; /* may repeat */
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} un_sla;
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/* AS external links advertisements */
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struct {
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struct in_addr asla_mask;
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struct aslametric {
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u_int32_t asla_tosmetric;
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struct in_addr asla_forward;
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struct in_addr asla_tag;
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} asla_metric[1]; /* may repeat */
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} un_asla;
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/* Multicast group membership */
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struct mcla {
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u_int32_t mcla_vtype;
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struct in_addr mcla_vid;
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} un_mcla[1];
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/* Opaque LSA */
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struct opaque {
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u_int8_t opaque_type;
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u_int8_t opaque_id[3];
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struct in_addr adv_router;
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struct in_addr sequence_num;
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u_int16_t chksum;
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u_int16_t length;
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} un_opaque[1];
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} lsa_un;
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};
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/*
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* TOS metric struct (will be 0 or more in router links update)
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*/
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struct tos_metric {
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u_int8_t tos_type;
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u_int8_t tos_zero;
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u_int16_t tos_metric;
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};
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#define OSPF_AUTH_SIZE 8
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/*
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* the main header
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*/
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struct ospfhdr {
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u_int8_t ospf_version;
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u_int8_t ospf_type;
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u_int16_t ospf_len;
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struct in_addr ospf_routerid;
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struct in_addr ospf_areaid;
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u_int16_t ospf_chksum;
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u_int16_t ospf_authtype;
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u_int8_t ospf_authdata[OSPF_AUTH_SIZE];
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union {
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/* Hello packet */
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struct {
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struct in_addr hello_mask;
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u_int16_t hello_helloint;
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u_int8_t hello_options;
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u_int8_t hello_priority;
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u_int32_t hello_deadint;
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struct in_addr hello_dr;
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struct in_addr hello_bdr;
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struct in_addr hello_neighbor[1]; /* may repeat */
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} un_hello;
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/* Database Description packet */
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struct {
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u_int8_t db_zero[2];
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u_int8_t db_options;
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u_int8_t db_flags;
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u_int32_t db_seq;
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struct lsa_hdr db_lshdr[1]; /* may repeat */
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} un_db;
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/* Link State Request */
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struct lsr {
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u_int32_t ls_type;
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struct in_addr ls_stateid;
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struct in_addr ls_router;
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} un_lsr[1]; /* may repeat */
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/* Link State Update */
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struct {
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u_int32_t lsu_count;
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struct lsa lsu_lsa[1]; /* may repeat */
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} un_lsu;
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/* Link State Acknowledgement */
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struct {
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struct lsa_hdr lsa_lshdr[1]; /* may repeat */
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} un_lsa ;
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} ospf_un ;
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};
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#define ospf_hello ospf_un.un_hello
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#define ospf_db ospf_un.un_db
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#define ospf_lsr ospf_un.un_lsr
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#define ospf_lsu ospf_un.un_lsu
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#define ospf_lsa ospf_un.un_lsa
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