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/* $OpenBSD: ospf6.h,v 1.7 2007/10/16 21:58:17 claudio Exp $ */
/*
* Copyright (c) 2004, 2005, 2007 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>
/* misc */
#define OSPF6_VERSION 3
#define IPPROTO_OSPF 89
#define AllSPFRouters "ff02::5"
#define AllDRouters "ff02::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
#define DEFAULT_RTR_DEAD_TIME 40
#define MIN_RTR_DEAD_TIME 2
#define MAX_RTR_DEAD_TIME 65535
#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 */
#define DEFAULT_SPF_DELAY 1
#define MIN_SPF_DELAY 1
#define MAX_SPF_DELAY 10
#define DEFAULT_SPF_HOLDTIME 5
#define MIN_SPF_HOLDTIME 1
#define MAX_SPF_HOLDTIME 5
#define MIN_MD_ID 0
#define MAX_MD_ID 255
#define DEFAULT_INSTANCE_ID 0
#define MIN_INSTANCE_ID 0
#define MAX_INSTANCE_ID 0
/* OSPF compatibility flags */
#define OSPF_OPTION_V6 0x01
#define OSPF_OPTION_E 0x02
#define OSPF_OPTION_MC 0x04
#define OSPF_OPTION_N 0x08
#define OSPF_OPTION_R 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
/* 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 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_int8_t instance;
u_int8_t zero; /* must be zero */
};
/* Hello header (type 1) */
struct hello_hdr {
u_int32_t iface_id;
u_int8_t rtr_priority;
u_int8_t opts1;
u_int8_t opts2;
u_int8_t opts3;
u_int16_t hello_interval;
u_int16_t rtr_dead_interval;
u_int32_t d_rtr;
u_int32_t bd_rtr;
};
/* Database Description header (type 2) */
struct db_dscrp_hdr {
u_int32_t opts;
u_int16_t iface_mtu;
u_int8_t zero; /* must be zero */
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_int16_t zero;
u_int16_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_LINK 0x0008
#define LSA_TYPE_ROUTER 0x2001
#define LSA_TYPE_NETWORK 0x2002
#define LSA_TYPE_INTER_A_PREFIX 0x2003
#define LSA_TYPE_INTER_A_ROUTER 0x2004
#define LSA_TYPE_INTRA_A_PREFIX 0x2009
#define LSA_TYPE_EXTERNAL 0x4005
#define LINK_TYPE_POINTTOPOINT 1
#define LINK_TYPE_TRANSIT_NET 2
#define LINK_TYPE_RESERVED 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
#define OSPF_RTR_W 0x08
struct lsa_rtr {
u_int32_t opts; /* 8bit flags + 24bits options */
};
struct lsa_rtr_link {
u_int8_t type;
u_int8_t dummy;
u_int16_t metric;
u_int32_t iface_id;
u_int32_t nbr_iface_id;
u_int32_t nbr_rtr_id;
};
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_int16_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 ((u_int16_t)(&((struct lsa_hdr *)0)->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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