/* $OpenBSD: ospf.h,v 1.23 2013/01/17 09:14:15 markus 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 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 120 #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 /* msec */ #define KR_RELOAD_TIMER 250 #define KR_RELOAD_HOLD_TIMER 5000 #define MIN_MD_ID 0 #define MAX_MD_ID 255 #define MAX_SIMPLE_AUTH_LEN 8 /* OSPF compatibility flags */ #define OSPF_OPTION_MT 0x01 #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 #define OSPF_OPTION_O 0x40 /* only on DD options */ #define OSPF_OPTION_DN 0x80 /* only on LSA options */ /* 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 LSA_TYPE_LINK_OPAQ 9 #define LSA_TYPE_AREA_OPAQ 10 #define LSA_TYPE_AS_OPAQ 11 #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 /* for some reason they thought 24bit types are fun, make them less a hazard */ #define LSA_24_MASK 0xffffff #define LSA_24_GETHI(x) \ ((x) >> 24) #define LSA_24_GETLO(x) \ ((x) & LSA_24_MASK) #define LSA_24_SETHI(x, y) \ ((x) = ((x) & LSA_24_MASK) | (((y) & 0xff) << 24)) #define LSA_24_SETLO(x, y) \ ((x) = ((y) & LSA_24_MASK) | ((x) & ~LSA_24_MASK)) #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_ */
