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/* $OpenBSD: ospf.h,v 1.19 2010/06/26 18:02:07 guenther Exp $ */
/*
* Copyright (c) 2004, 2005 Esben Norby <norby@openbsd.org>
*
* Permission to use, copy, modify, and distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
/* OSPF protocol definitions */
#ifndef _OSPF_H_
#define _OSPF_H_
#include <netinet/in.h>
#include <stddef.h>
/* misc */
#define OSPF_VERSION 2
#define IPPROTO_OSPF 89
#define AllSPFRouters "224.0.0.5"
#define AllDRouters "224.0.0.6"
#define PACKET_HDR 100 /* XXX used to calculate the IP payload */
#define DEFAULT_METRIC 10
#define DEFAULT_REDIST_METRIC 100
#define MIN_METRIC 1
#define MAX_METRIC 65535 /* sum & as-ext lsa use 24bit metrics */
#define DEFAULT_PRIORITY 1
#define MIN_PRIORITY 0
#define MAX_PRIORITY 255
#define DEFAULT_HELLO_INTERVAL 10
#define MIN_HELLO_INTERVAL 1
#define MAX_HELLO_INTERVAL 65535
/* msec */
#define DEFAULT_FAST_INTERVAL 333
#define MIN_FAST_INTERVAL 50
#define MAX_FAST_INTERVAL 333
#define DEFAULT_RTR_DEAD_TIME 40
#define FAST_RTR_DEAD_TIME 1
#define MIN_RTR_DEAD_TIME 2
#define MAX_RTR_DEAD_TIME 2147483647
#define DEFAULT_RXMT_INTERVAL 5
#define MIN_RXMT_INTERVAL 5
#define MAX_RXMT_INTERVAL 3600
#define DEFAULT_TRANSMIT_DELAY 1
#define MIN_TRANSMIT_DELAY 1
#define MAX_TRANSMIT_DELAY 3600
#define DEFAULT_ADJ_TMOUT 60
#define DEFAULT_NBR_TMOUT 86400 /* 24 hours */
/* msec */
#define DEFAULT_SPF_DELAY 1000
#define MIN_SPF_DELAY 10
#define MAX_SPF_DELAY 10000
/* msec */
#define DEFAULT_SPF_HOLDTIME 5000
#define MIN_SPF_HOLDTIME 10
#define MAX_SPF_HOLDTIME 5000
#define MIN_MD_ID 0
#define MAX_MD_ID 255
#define MAX_SIMPLE_AUTH_LEN 8
/* OSPF compatibility flags */
#define OSPF_OPTION_E 0x02
#define OSPF_OPTION_MC 0x04
#define OSPF_OPTION_NP 0x08
#define OSPF_OPTION_EA 0x10
#define OSPF_OPTION_DC 0x20
/* OSPF packet types */
#define PACKET_TYPE_HELLO 1
#define PACKET_TYPE_DD 2
#define PACKET_TYPE_LS_REQUEST 3
#define PACKET_TYPE_LS_UPDATE 4
#define PACKET_TYPE_LS_ACK 5
/* OSPF auth types */
#define AUTH_TYPE_NONE 0
#define AUTH_TYPE_SIMPLE 1
#define AUTH_TYPE_CRYPT 2
#define MIN_AUTHTYPE 0
#define MAX_AUTHTYPE 2
/* LSA */
#define LS_REFRESH_TIME 1800
#define MIN_LS_INTERVAL 5
#define MIN_LS_ARRIVAL 1
#define DEFAULT_AGE 0
#define MAX_AGE 3600
#define CHECK_AGE 300
#define MAX_AGE_DIFF 900
#define LS_INFINITY 0xffffff
#define RESV_SEQ_NUM 0x80000000 /* reserved and "unused" */
#define INIT_SEQ_NUM 0x80000001
#define MAX_SEQ_NUM 0x7fffffff
/* OSPF header */
struct crypt {
u_int16_t dummy;
u_int8_t keyid;
u_int8_t len;
u_int32_t seq_num;
};
struct ospf_hdr {
u_int8_t version;
u_int8_t type;
u_int16_t len;
u_int32_t rtr_id;
u_int32_t area_id;
u_int16_t chksum;
u_int16_t auth_type;
union {
char simple[MAX_SIMPLE_AUTH_LEN];
struct crypt crypt;
} auth_key;
};
/* Hello header (type 1) */
struct hello_hdr {
u_int32_t mask;
u_int16_t hello_interval;
u_int8_t opts;
u_int8_t rtr_priority;
u_int32_t rtr_dead_interval;
u_int32_t d_rtr;
u_int32_t bd_rtr;
};
/* Database Description header (type 2) */
struct db_dscrp_hdr {
u_int16_t iface_mtu;
u_int8_t opts;
u_int8_t bits;
u_int32_t dd_seq_num;
};
#define OSPF_DBD_MS 0x01
#define OSPF_DBD_M 0x02
#define OSPF_DBD_I 0x04
/* Link State Request header (type 3) */
struct ls_req_hdr {
u_int32_t type;
u_int32_t ls_id;
u_int32_t adv_rtr;
};
/* Link State Update header (type 4) */
struct ls_upd_hdr {
u_int32_t num_lsa;
};
#define LSA_TYPE_ROUTER 1
#define LSA_TYPE_NETWORK 2
#define LSA_TYPE_SUM_NETWORK 3
#define LSA_TYPE_SUM_ROUTER 4
#define LSA_TYPE_EXTERNAL 5
#define LINK_TYPE_POINTTOPOINT 1
#define LINK_TYPE_TRANSIT_NET 2
#define LINK_TYPE_STUB_NET 3
#define LINK_TYPE_VIRTUAL 4
/* LSA headers */
#define LSA_METRIC_MASK 0x00ffffff /* only for sum & as-ext */
#define LSA_ASEXT_E_FLAG 0x80000000
#define OSPF_RTR_B 0x01
#define OSPF_RTR_E 0x02
#define OSPF_RTR_V 0x04
struct lsa_rtr {
u_int8_t flags;
u_int8_t dummy;
u_int16_t nlinks;
};
struct lsa_rtr_link {
u_int32_t id;
u_int32_t data;
u_int8_t type;
u_int8_t num_tos;
u_int16_t metric;
};
struct lsa_net {
u_int32_t mask;
u_int32_t att_rtr[1];
};
struct lsa_net_link {
u_int32_t att_rtr;
};
struct lsa_sum {
u_int32_t mask;
u_int32_t metric; /* only lower 24 bit */
};
struct lsa_asext {
u_int32_t mask;
u_int32_t metric; /* lower 24 bit plus E bit */
u_int32_t fw_addr;
u_int32_t ext_tag;
};
struct lsa_hdr {
u_int16_t age;
u_int8_t opts;
u_int8_t type;
u_int32_t ls_id;
u_int32_t adv_rtr;
u_int32_t seq_num;
u_int16_t ls_chksum;
u_int16_t len;
};
#define LS_CKSUM_OFFSET offsetof(struct lsa_hdr, ls_chksum)
struct lsa {
struct lsa_hdr hdr;
union {
struct lsa_rtr rtr;
struct lsa_net net;
struct lsa_sum sum;
struct lsa_asext asext;
} data;
};
#endif /* !_OSPF_H_ */
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