* Copyright (c) 1991, 1993, 1994, 1995, 1996, 1997

/*
* Copyright (c) 1991, 1993, 1994, 1995, 1996, 1997
* The Regents of the University of California. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that: (1) source code distributions
* retain the above copyright notice and this paragraph in its entirety, (2)
* distributions including binary code include the above copyright notice and
* this paragraph in its entirety in the documentation or other materials
* provided with the distribution, and (3) all advertising materials mentioning
* features or use of this software display the following acknowledgement:
* ``This product includes software developed by the University of California,
* Lawrence Berkeley Laboratory and its contributors.'' Neither the name of
* the University nor the names of its contributors may be used to endorse
* or promote products derived from this software without specific prior
* written permission.
* THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR IMPLIED
* WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
*
* OSPF support contributed by Jeffrey Honig ([email protected])
*/
#define OSPF_TYPE_HELLO 1 /* Hello */
#define OSPF_TYPE_DD 2 /* Database Description */
#define OSPF_TYPE_LS_REQ 3 /* Link State Request */
#define OSPF_TYPE_LS_UPDATE 4 /* Link State Update */
#define OSPF_TYPE_LS_ACK 5 /* Link State Ack */

/* Options field
*
* +------------------------------------+
* | DN | O | DC | L | N/P | MC | E | T |
* +------------------------------------+
*
*/

#define OSPF_OPTION_MT 0x01 /* MT bit: multi-topology */
#define OSPF_OPTION_E 0x02 /* E bit: External routes advertised */
#define OSPF_OPTION_MC 0x04 /* MC bit: Multicast capable */
#define OSPF_OPTION_NP 0x08 /* N/P bit: NSSA capable */
#define OSPF_OPTION_L 0x10 /* L bit: Packet contains LLS data block */
#define OSPF_OPTION_DC 0x20 /* DC bit: Demand circuit capable */
#define OSPF_OPTION_O 0x40 /* O bit: Opaque LSA capable */
#define OSPF_OPTION_DN 0x80 /* DN bit: Up/Down Bit capable - draft-ietf-ospf-2547-dnbit-04 */

/* ospf_authtype */
#define OSPF_AUTH_NONE 0 /* No auth-data */
#define OSPF_AUTH_SIMPLE 1 /* Simple password */
#define OSPF_AUTH_SIMPLE_LEN 8 /* max length of simple authentication */
#define OSPF_AUTH_MD5 2 /* MD5 authentication */
#define OSPF_AUTH_MD5_LEN 16 /* length of MD5 authentication */

/* db_flags */
#define OSPF_DB_INIT 0x04
#define OSPF_DB_MORE 0x02
#define OSPF_DB_MASTER 0x01
#define OSPF_DB_RESYNC 0x08 /* RFC4811 */

/* ls_type */
#define LS_TYPE_ROUTER 1 /* router link */
#define LS_TYPE_NETWORK 2 /* network link */
#define LS_TYPE_SUM_IP 3 /* summary link */
#define LS_TYPE_SUM_ABR 4 /* summary area link */
#define LS_TYPE_ASE 5 /* ASE */
#define LS_TYPE_GROUP 6 /* Group membership (multicast */
/* extensions 23 July 1991) */
#define LS_TYPE_NSSA 7 /* rfc3101 - Not so Stubby Areas */
#define LS_TYPE_OPAQUE_LL 9 /* rfc2370 - Opaque Link Local */
#define LS_TYPE_OPAQUE_AL 10 /* rfc2370 - Opaque Link Local */
#define LS_TYPE_OPAQUE_DW 11 /* rfc2370 - Opaque Domain Wide */

#define LS_OPAQUE_TYPE_TE 1 /* rfc3630 */
#define LS_OPAQUE_TYPE_GRACE 3 /* rfc3623 */
#define LS_OPAQUE_TYPE_RI 4 /* draft-ietf-ospf-cap-03 */

#define LS_OPAQUE_TE_TLV_ROUTER 1 /* rfc3630 */
#define LS_OPAQUE_TE_TLV_LINK 2 /* rfc3630 */

#define LS_OPAQUE_TE_LINK_SUBTLV_LINK_TYPE 1 /* rfc3630 */
#define LS_OPAQUE_TE_LINK_SUBTLV_LINK_ID 2 /* rfc3630 */
#define LS_OPAQUE_TE_LINK_SUBTLV_LOCAL_IP 3 /* rfc3630 */
#define LS_OPAQUE_TE_LINK_SUBTLV_REMOTE_IP 4 /* rfc3630 */
#define LS_OPAQUE_TE_LINK_SUBTLV_TE_METRIC 5 /* rfc3630 */
#define LS_OPAQUE_TE_LINK_SUBTLV_MAX_BW 6 /* rfc3630 */
#define LS_OPAQUE_TE_LINK_SUBTLV_MAX_RES_BW 7 /* rfc3630 */
#define LS_OPAQUE_TE_LINK_SUBTLV_UNRES_BW 8 /* rfc3630 */
#define LS_OPAQUE_TE_LINK_SUBTLV_ADMIN_GROUP 9 /* rfc3630 */
#define LS_OPAQUE_TE_LINK_SUBTLV_LINK_LOCAL_REMOTE_ID 11 /* rfc4203 */
#define LS_OPAQUE_TE_LINK_SUBTLV_LINK_PROTECTION_TYPE 14 /* rfc4203 */
#define LS_OPAQUE_TE_LINK_SUBTLV_INTF_SW_CAP_DESCR 15 /* rfc4203 */
#define LS_OPAQUE_TE_LINK_SUBTLV_SHARED_RISK_GROUP 16 /* rfc4203 */
#define LS_OPAQUE_TE_LINK_SUBTLV_BW_CONSTRAINTS 17 /* rfc4124 */

#define LS_OPAQUE_TE_LINK_SUBTLV_LINK_TYPE_PTP 1 /* rfc3630 */
#define LS_OPAQUE_TE_LINK_SUBTLV_LINK_TYPE_MA 2 /* rfc3630 */

#define LS_OPAQUE_GRACE_TLV_PERIOD 1 /* rfc3623 */
#define LS_OPAQUE_GRACE_TLV_REASON 2 /* rfc3623 */
#define LS_OPAQUE_GRACE_TLV_INT_ADDRESS 3 /* rfc3623 */

#define LS_OPAQUE_GRACE_TLV_REASON_UNKNOWN 0 /* rfc3623 */
#define LS_OPAQUE_GRACE_TLV_REASON_SW_RESTART 1 /* rfc3623 */
#define LS_OPAQUE_GRACE_TLV_REASON_SW_UPGRADE 2 /* rfc3623 */
#define LS_OPAQUE_GRACE_TLV_REASON_CP_SWITCH 3 /* rfc3623 */

#define LS_OPAQUE_RI_TLV_CAP 1 /* draft-ietf-ospf-cap-03 */

/* rla_link.link_type */
#define RLA_TYPE_ROUTER 1 /* point-to-point to another router */
#define RLA_TYPE_TRANSIT 2 /* connection to transit network */
#define RLA_TYPE_STUB 3 /* connection to stub network */
#define RLA_TYPE_VIRTUAL 4 /* virtual link */

/* rla_flags */
#define RLA_FLAG_B 0x01
#define RLA_FLAG_E 0x02
#define RLA_FLAG_V 0x04
#define RLA_FLAG_W 0x08
#define RLA_FLAG_NT 0x10 /* RFC3101 Appendix B */
#define RLA_FLAG_H 0x80

/* sla_tosmetric breakdown */
#define SLA_MASK_TOS 0x7f000000
#define SLA_MASK_METRIC 0x00ffffff
#define SLA_SHIFT_TOS 24

/* asla_tosmetric breakdown */
#define ASLA_FLAG_EXTERNAL 0x80000000
#define ASLA_MASK_TOS 0x7f000000
#define ASLA_SHIFT_TOS 24
#define ASLA_MASK_METRIC 0x00ffffff

/* multicast vertex type */
#define MCLA_VERTEX_ROUTER 1
#define MCLA_VERTEX_NETWORK 2

/* Link-Local-Signaling */
#define OSPF_LLS_HDRLEN 4U /* RFC5613 Section 2.2 */

#define OSPF_LLS_EO 1 /* RFC4811, RFC4812 */
#define OSPF_LLS_MD5 2 /* RFC4813 */

#define OSPF_LLS_EO_LR 0x00000001 /* RFC4811 */
#define OSPF_LLS_EO_RS 0x00000002 /* RFC4812 */

/*
* TOS metric struct (will be 0 or more in router links update)
*/
struct tos_metric {
nd_uint8_t tos_type;
nd_uint8_t reserved;
nd_uint16_t tos_metric;
};
struct tos_link {
nd_uint8_t link_type;
nd_uint8_t link_tos_count;
nd_uint16_t tos_metric;
};
union un_tos {
struct tos_link link;
struct tos_metric metrics;
};

/* link state advertisement header */
struct lsa_hdr {
nd_uint16_t ls_age;
nd_uint8_t ls_options;
nd_uint8_t ls_type;
union {
nd_ipv4 lsa_id;
struct { /* opaque LSAs change the LSA-ID field */
nd_uint8_t opaque_type;
nd_uint24_t opaque_id;
} opaque_field;
} un_lsa_id;
nd_ipv4 ls_router;
nd_uint32_t ls_seq;
nd_uint16_t ls_chksum;
nd_uint16_t ls_length;
};

/* link state advertisement */
struct lsa {
struct lsa_hdr ls_hdr;

/* Link state types */
union {
/* Router links advertisements */
struct {
nd_uint8_t rla_flags;
nd_byte rla_zero;
nd_uint16_t rla_count;
struct rlalink {
nd_ipv4 link_id;
nd_ipv4 link_data;
union un_tos un_tos;
} rla_link[1]; /* may repeat */
} un_rla;

/* Network links advertisements */
struct {
nd_ipv4 nla_mask;
nd_ipv4 nla_router[1]; /* may repeat */
} un_nla;

/* Summary links advertisements */
struct {
nd_ipv4 sla_mask;
nd_uint32_t sla_tosmetric[1]; /* may repeat */
} un_sla;

/* AS external links advertisements */
struct {
nd_ipv4 asla_mask;
struct aslametric {
nd_uint32_t asla_tosmetric;
nd_ipv4 asla_forward;
nd_ipv4 asla_tag;
} asla_metric[1]; /* may repeat */
} un_asla;

/* Multicast group membership */
struct mcla {
nd_uint32_t mcla_vtype;
nd_ipv4 mcla_vid;
} un_mcla[1];

/* Opaque TE LSA */
struct {
nd_uint16_t type;
nd_uint16_t length;
nd_byte data[1]; /* may repeat */
} un_te_lsa_tlv[1]; /* may repeat */

/* Opaque Grace LSA */
struct {
nd_uint16_t type;
nd_uint16_t length;
nd_byte data[1]; /* may repeat */
} un_grace_tlv[1]; /* may repeat */

/* Opaque Router information LSA */
struct {
nd_uint16_t type;
nd_uint16_t length;
nd_byte data[1]; /* may repeat */
} un_ri_tlv[1]; /* may repeat */

/* Unknown LSA */
struct unknown {
nd_byte data[1]; /* may repeat */
} un_unknown[1];

} lsa_un;
};

#define OSPF_AUTH_SIZE 8

/*
* the main header
*/
struct ospfhdr {
nd_uint8_t ospf_version;
nd_uint8_t ospf_type;
nd_uint16_t ospf_len;
nd_ipv4 ospf_routerid;
nd_ipv4 ospf_areaid;
nd_uint16_t ospf_chksum;
nd_uint16_t ospf_authtype;
nd_byte ospf_authdata[OSPF_AUTH_SIZE];
union {

/* Hello packet */
struct {
nd_ipv4 hello_mask;
nd_uint16_t hello_helloint;
nd_uint8_t hello_options;
nd_uint8_t hello_priority;
nd_uint32_t hello_deadint;
nd_ipv4 hello_dr;
nd_ipv4 hello_bdr;
nd_ipv4 hello_neighbor[1]; /* may repeat */
} un_hello;

/* Database Description packet */
struct {
nd_uint16_t db_ifmtu;
nd_uint8_t db_options;
nd_uint8_t db_flags;
nd_uint32_t db_seq;
struct lsa_hdr db_lshdr[1]; /* may repeat */
} un_db;

/* Link State Request */
struct lsr {
nd_uint32_t ls_type;
union {
nd_ipv4 ls_stateid;
struct { /* opaque LSAs change the LSA-ID field */
nd_uint8_t opaque_type;
nd_uint24_t opaque_id;
} opaque_field;
} un_ls_stateid;
nd_ipv4 ls_router;
} un_lsr[1]; /* may repeat */

/* Link State Update */
struct {
nd_uint32_t lsu_count;
struct lsa lsu_lsa[1]; /* may repeat */
} un_lsu;

/* Link State Acknowledgement */
struct {
struct lsa_hdr lsa_lshdr[1]; /* may repeat */
} un_lsa ;
} ospf_un ;
};

#define ospf_hello ospf_un.un_hello
#define ospf_db ospf_un.un_db
#define ospf_lsr ospf_un.un_lsr
#define ospf_lsu ospf_un.un_lsu
#define ospf_lsa ospf_un.un_lsa