/* $OpenBSD: ospf6.h,v 1.14 2009/03/29 18:59:22 stsp Exp $ */ /* * Copyright (c) 2004, 2005, 2007 Esben Norby * * 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 /* 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_x 0x04 /* ignored, should be 0 */ #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_int32_t opts; /* 8bit rtr_priority + 24bits options */ 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 LSA_TYPE_FLAG_U 0x8000 #define LSA_TYPE_FLAG_S2 0x4000 #define LSA_TYPE_FLAG_S1 0x2000 #define LSA_TYPE_SCOPE_MASK 0x6000 #define LSA_IS_SCOPE_LLOCAL(x) \ (((x) & LSA_TYPE_SCOPE_MASK) == 0) #define LSA_IS_SCOPE_AREA(x) \ (((x) & LSA_TYPE_SCOPE_MASK) == LSA_TYPE_FLAG_S1) #define LSA_IS_SCOPE_AS(x) \ (((x) & LSA_TYPE_SCOPE_MASK) == LSA_TYPE_FLAG_S2) #define LINK_TYPE_POINTTOPOINT 1 #define LINK_TYPE_TRANSIT_NET 2 #define LINK_TYPE_RESERVED 3 #define LINK_TYPE_VIRTUAL 4 /* 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)) /* 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_x 0x08 /* ignored, should be 0 */ #define OSPF_RTR_Nt 0x10 #define OSPF_PREFIX_NU 0x01 #define OSPF_PREFIX_LA 0x02 #define OSPF_PREFIX_x 0x04 /* ignored, should be 0 */ #define OSPF_PREFIX_P 0x08 #define OSPF_PREFIX_DN 0x10 /* return encoded IPv6 prefix size in bytes depending on the prefixlen */ #define LSA_PREFIXSIZE(x) (((x) + 31)/32 * 4) struct lsa_prefix { u_int8_t prefixlen; u_int8_t options; u_int16_t metric; /* + an IPv6 prefix encoded in (prefixlen + 31)/32 words */ }; 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 opts; /* 24bits options */ }; struct lsa_net_link { u_int32_t att_rtr; }; struct lsa_prefix_sum { u_int32_t metric; /* only lower 24 bit */ /* + one prefix */ }; struct lsa_rtr_sum { u_int32_t opts; /* lower 24bit options */ u_int32_t metric; /* only lower 24 bit */ u_int32_t dest_rtr_id; }; 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_link { u_int32_t opts; /* rtr pri & 24bit options */ struct in6_addr lladdr; u_int32_t numprefix; /* + numprefix * lsa_prefix */ }; struct lsa_intra_prefix { u_int16_t numprefix; u_int16_t ref_type; u_int32_t ref_lsid; u_int32_t ref_adv_rtr; /* + numprefix * lsa_prefix */ }; 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_prefix_sum pref_sum; struct lsa_rtr_sum rtr_sum; struct lsa_asext asext; struct lsa_link link; struct lsa_intra_prefix pref_intra; } data; }; #endif /* !_OSPF_H_ */