/* * BIRD -- OSPF * * (c) 1999 Ondrej Filip * * Can be freely distributed and used under the terms of the GNU GPL. */ #ifndef _BIRD_OSPF_H_ #define _BIRD_OSPF_H_ #define OSPF_PROTO 89 #ifndef IPV6 #define OSPF_VERSION 2 #define AllSPFRouters ipa_from_u32(0xe0000005) /* 224.0.0.5 */ #define AllDRouters ipa_from_u32(0xe0000006) /* 224.0.0.6 */ #else #error Multicast address not defined in IPv6 #endif struct proto_ospf { struct proto proto; list iface_list; /* Interfaces we really use */ }; struct ospf_config { struct proto_config c; u32 area; /* FIXME: Area ID !!! This is wrong !!! * Should respect interface */ }; struct ospf_iface { node n; struct proto_ospf *proto; struct iface *iface; /* Nest's iface */ sock *hello_sk; /* Hello socket */ sock *ip_sk; /* IP socket (for DD ...) */ list neigh_list; /* List of neigbours */ u32 area; /* OSPF Area */ u16 cost; /* Cost of iface */ int rxmtint; /* number of seconds between LSA retransmissions */ int iftransdelay; /* The estimated number of seconds it takes to transmit a Link State Update Packet over this interface. LSAs contained in the update */ u8 priority; /* A router priority for DR election */ u16 helloint; /* number of seconds between hello sending */ u32 deadc; /* after "deadint" missing hellos is router dead */ u16 autype; u8 aukey[8]; u8 options; ip_addr drip; /* Designated router */ u32 drid; ip_addr bdrip; /* Backup DR */ u32 bdrid; int type; /* OSPF view of type */ #define OSPF_IT_BROADCAST 0 #define OSPF_IT_NBMA 1 #define OSPF_IT_PTP 2 int state; /* Interface state machine */ #define OSPF_IS_DOWN 0 /* Should never happen */ #define OSPF_IS_WAITING 1 /* Waiting for Wait timer */ #define OSPF_IS_PTP 2 /* PTP operational */ #define OSPF_IS_DROTHER 3 /* I'm on BCAST or NBMA and I'm not DR */ #define OSPF_IS_BACKUP 4 /* I'm BDR */ #define OSPF_IS_DR 5 /* I'm DR */ timer *wait_timer; /* WAIT timer */ timer *hello_timer; /* HELLOINT timer */ /* Default values for interface parameters */ #define COST_D 10 #define RXMTINT_D 5 #define IFTRANSDELAY_D 1 #define PRIORITY_D 1 #define HELLOINT_D 10 #define DEADC_D 4 #define WAIT_DMH 2 /* Value of Wait timer - not found it in RFC * - using 2*HELLO */ }; struct ospf_patt { struct iface_patt i; u16 cost; byte mode; }; struct ospf_packet { u8 version; u8 type; #define HELLO 1 /* Hello */ #define DBDES 2 /* Database description */ #define LSREQ 3 /* Link state request */ #define LSUPD 4 /* Link state update */ #define LSACK 5 /* Link state acknowledgement */ u16 length; u32 routerid; u32 areaid; u16 checksum; u16 autype; u8 authetication[8]; }; struct ospf_hello_packet { struct ospf_packet ospf_packet; ip_addr netmask; u16 helloint; u8 options; u8 priority; u32 deadint; u32 dr; u32 bdr; }; struct ospf_ddseq_packet { struct ospf_packet ospf_packet; u16 iface_mtu; u16 options; u32 ddseq_no; }; struct ospf_neighbor { node n; struct ospf_iface *ifa; int state; #define NEIGHBOR_DOWN 0 #define NEIGHBOR_ATTEMPT 1 #define NEIGHBOR_INIT 2 #define NEIGHBOR_2WAY 3 #define NEIGHBOR_EXSTART 4 #define NEIGHBOR_EXCHANGE 5 #define NEIGHBOR_LOADING 6 #define NEIGHBOR_FULL 7 timer *inactim; /* Inactivity timer */ byte ms; /* Master/slave */ #define NEIGHBOR_SLAVE 0 #define NEIGHBOR_MASTER 1 u32 dds; /* DD Sequence number being sentg */ u32 ddr; /* last Dat Des packet */ u32 rid; /* Router ID */ byte priority; /* Priority */ byte options; /* Options */ u32 dr; /* Neigbour's idea of DR */ u32 bdr; /* Neigbour's idea of BDR */ u8 adj; /* built adjacency? */ }; #endif /* _BIRD_OSPF_H_ */