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https://github.com/the-tcpdump-group/tcpdump.git
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6babce0e17
This ensures that we have no purportedly-aligned-but-not-necessarily- unaligned values that we access; we have to use EXTRACT_ macros/functions to get at IPv4 address values.
325 lines
10 KiB
C
325 lines
10 KiB
C
/*
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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_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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* | DN | O | DC | L | 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_L 0x10 /* L bit: Packet contains LLS data block */
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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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#define OSPF_OPTION_DN 0x80 /* DN bit: Up/Down Bit capable - draft-ietf-ospf-2547-dnbit-04 */
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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_SIMPLE_LEN 8 /* max length of simple authentication */
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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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#define OSPF_DB_RESYNC 0x08 /* RFC4811 */
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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 /* rfc3101 - 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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#define LS_OPAQUE_TYPE_TE 1 /* rfc3630 */
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#define LS_OPAQUE_TYPE_GRACE 3 /* rfc3623 */
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#define LS_OPAQUE_TYPE_RI 4 /* draft-ietf-ospf-cap-03 */
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#define LS_OPAQUE_TE_TLV_ROUTER 1 /* rfc3630 */
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#define LS_OPAQUE_TE_TLV_LINK 2 /* rfc3630 */
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#define LS_OPAQUE_TE_LINK_SUBTLV_LINK_TYPE 1 /* rfc3630 */
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#define LS_OPAQUE_TE_LINK_SUBTLV_LINK_ID 2 /* rfc3630 */
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#define LS_OPAQUE_TE_LINK_SUBTLV_LOCAL_IP 3 /* rfc3630 */
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#define LS_OPAQUE_TE_LINK_SUBTLV_REMOTE_IP 4 /* rfc3630 */
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#define LS_OPAQUE_TE_LINK_SUBTLV_TE_METRIC 5 /* rfc3630 */
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#define LS_OPAQUE_TE_LINK_SUBTLV_MAX_BW 6 /* rfc3630 */
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#define LS_OPAQUE_TE_LINK_SUBTLV_MAX_RES_BW 7 /* rfc3630 */
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#define LS_OPAQUE_TE_LINK_SUBTLV_UNRES_BW 8 /* rfc3630 */
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#define LS_OPAQUE_TE_LINK_SUBTLV_ADMIN_GROUP 9 /* rfc3630 */
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#define LS_OPAQUE_TE_LINK_SUBTLV_LINK_LOCAL_REMOTE_ID 11 /* rfc4203 */
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#define LS_OPAQUE_TE_LINK_SUBTLV_LINK_PROTECTION_TYPE 14 /* rfc4203 */
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#define LS_OPAQUE_TE_LINK_SUBTLV_INTF_SW_CAP_DESCR 15 /* rfc4203 */
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#define LS_OPAQUE_TE_LINK_SUBTLV_SHARED_RISK_GROUP 16 /* rfc4203 */
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#define LS_OPAQUE_TE_LINK_SUBTLV_BW_CONSTRAINTS 17 /* rfc4124 */
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#define LS_OPAQUE_TE_LINK_SUBTLV_LINK_TYPE_PTP 1 /* rfc3630 */
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#define LS_OPAQUE_TE_LINK_SUBTLV_LINK_TYPE_MA 2 /* rfc3630 */
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#define LS_OPAQUE_GRACE_TLV_PERIOD 1 /* rfc3623 */
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#define LS_OPAQUE_GRACE_TLV_REASON 2 /* rfc3623 */
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#define LS_OPAQUE_GRACE_TLV_INT_ADDRESS 3 /* rfc3623 */
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#define LS_OPAQUE_GRACE_TLV_REASON_UNKNOWN 0 /* rfc3623 */
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#define LS_OPAQUE_GRACE_TLV_REASON_SW_RESTART 1 /* rfc3623 */
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#define LS_OPAQUE_GRACE_TLV_REASON_SW_UPGRADE 2 /* rfc3623 */
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#define LS_OPAQUE_GRACE_TLV_REASON_CP_SWITCH 3 /* rfc3623 */
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#define LS_OPAQUE_RI_TLV_CAP 1 /* draft-ietf-ospf-cap-03 */
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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-Local-Signaling */
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#define OSPF_LLS_HDRLEN 4U /* RFC5613 Section 2.2 */
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#define OSPF_LLS_EO 1 /* RFC4811, RFC4812 */
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#define OSPF_LLS_MD5 2 /* RFC4813 */
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#define OSPF_LLS_EO_LR 0x00000001 /* RFC4811 */
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#define OSPF_LLS_EO_RS 0x00000002 /* RFC4812 */
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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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nd_uint8_t tos_type;
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nd_uint8_t reserved;
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nd_uint16_t tos_metric;
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};
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struct tos_link {
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nd_uint8_t link_type;
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nd_uint8_t link_tos_count;
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nd_uint16_t tos_metric;
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};
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union un_tos {
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struct tos_link link;
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struct tos_metric metrics;
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};
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/* link state advertisement header */
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struct lsa_hdr {
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nd_uint16_t ls_age;
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nd_uint8_t ls_options;
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nd_uint8_t ls_type;
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union {
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nd_ipv4 lsa_id;
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struct { /* opaque LSAs change the LSA-ID field */
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nd_uint8_t opaque_type;
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nd_uint24_t opaque_id;
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} opaque_field;
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} un_lsa_id;
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nd_ipv4 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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/* 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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nd_uint8_t rla_flags;
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nd_byte rla_zero;
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nd_uint16_t rla_count;
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struct rlalink {
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nd_ipv4 link_id;
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nd_ipv4 link_data;
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union un_tos un_tos;
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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_ipv4 nla_mask;
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nd_ipv4 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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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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/* AS external links advertisements */
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struct {
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nd_ipv4 asla_mask;
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struct aslametric {
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nd_uint32_t asla_tosmetric;
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nd_ipv4 asla_forward;
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nd_ipv4 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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nd_uint32_t mcla_vtype;
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nd_ipv4 mcla_vid;
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} un_mcla[1];
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/* Opaque TE LSA */
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struct {
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nd_uint16_t type;
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nd_uint16_t length;
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nd_byte data[1]; /* may repeat */
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} un_te_lsa_tlv[1]; /* may repeat */
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/* Opaque Grace LSA */
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struct {
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nd_uint16_t type;
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nd_uint16_t length;
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nd_byte data[1]; /* may repeat */
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} un_grace_tlv[1]; /* may repeat */
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/* Opaque Router information LSA */
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struct {
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nd_uint16_t type;
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nd_uint16_t length;
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nd_byte data[1]; /* may repeat */
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} un_ri_tlv[1]; /* may repeat */
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/* Unknown LSA */
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struct unknown {
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nd_byte data[1]; /* may repeat */
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} un_unknown[1];
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} lsa_un;
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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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nd_uint8_t ospf_version;
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nd_uint8_t ospf_type;
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nd_uint16_t ospf_len;
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nd_ipv4 ospf_routerid;
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nd_ipv4 ospf_areaid;
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nd_uint16_t ospf_chksum;
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nd_uint16_t ospf_authtype;
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nd_byte 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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nd_ipv4 hello_mask;
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nd_uint16_t hello_helloint;
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nd_uint8_t hello_options;
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nd_uint8_t hello_priority;
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nd_uint32_t hello_deadint;
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nd_ipv4 hello_dr;
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nd_ipv4 hello_bdr;
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nd_ipv4 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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nd_uint16_t db_ifmtu;
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nd_uint8_t db_options;
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nd_uint8_t db_flags;
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nd_uint32_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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nd_uint32_t ls_type;
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union {
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nd_ipv4 ls_stateid;
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struct { /* opaque LSAs change the LSA-ID field */
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nd_uint8_t opaque_type;
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nd_uint24_t opaque_id;
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} opaque_field;
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} un_ls_stateid;
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nd_ipv4 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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nd_uint32_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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