/* * 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 LOCAL_DEBUG #define SIPH 64 /* FIXME Size Of IP header */ #include "nest/bird.h" #include "lib/checksum.h" #include "lib/ip.h" #include "lib/lists.h" #include "lib/slists.h" #include "lib/socket.h" #include "lib/timer.h" #include "lib/resource.h" #include "nest/protocol.h" #include "nest/iface.h" #include "nest/route.h" #include "conf/conf.h" #include #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 */ #define DEFAULTDES ipa_from_u32(0) #else #error Multicast address not defined in IPv6 #endif #define LSREFRESHTIME 1800 /* 30 minutes */ #define MINLSINTERVAL 5 #define MINLSARRIVAL 1 #define LSINFINITY 0xffff /* RFC says 0xffffff ??? */ #define AGINGDELTA 20 /* FIXME What's good value? */ 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 */ struct ospf_area *oa; u32 an; /* Area number */ sock *hello_sk; /* Hello socket */ sock *dr_sk; /* For states DR or BACKUP */ sock *ip_sk; /* IP socket (for DD ...) */ list neigh_list; /* List of neigbours */ u16 cost; /* Cost of iface */ u16 rxmtint; /* number of seconds between LSA retransmissions */ u16 inftransdelay; /* 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 */ u16 waitint; /* number of sec before changing state from wait */ 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; u8 type; /* OSPF view of type */ #define OSPF_IT_BCAST 0 #define OSPF_IT_NBMA 1 #define OSPF_IT_PTP 2 #define OSPF_IT_VLINK 3 u8 state; /* Interface state machine */ #define OSPF_IS_DOWN 0 /* Not working */ #define OSPF_IS_LOOP 1 /* Should never happen */ #define OSPF_IS_WAITING 2 /* Waiting for Wait timer */ #define OSPF_IS_PTP 3 /* PTP operational */ #define OSPF_IS_DROTHER 4 /* I'm on BCAST or NBMA and I'm not DR */ #define OSPF_IS_BACKUP 5 /* I'm BDR */ #define OSPF_IS_DR 6 /* 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 INFTRANSDELAY_D 1 #define PRIORITY_D 1 #define HELLOINT_D 10 #define DEADC_D 4 #define WAIT_DMH 3 /* Value of Wait timer - not found it in RFC * - using 3*HELLO */ }; 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; #define BACKBONE 0 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 immsb { u8 ms:1; u8 m:1; u8 i:1; u8 padding:5; }; union imms { u8 byte; struct immsb bit; }; struct ospf_dbdes_packet { struct ospf_packet ospf_packet; u16 iface_mtu; u8 options; union imms imms; /* I, M, MS bits */ #define DBDES_MS 1 #define DBDES_M 2 #define DBDES_I 4 u32 ddseq; }; struct ospf_lsa_header { u16 age; /* LS Age */ #define LSA_MAXAGE 3600 /* 1 hour */ #define LSA_CHECKAGE 300 /* 5 minutes */ #define LSA_MAXAGEDIFF 900 /* 15 minutes */ u8 options; u8 type; u32 id; #define LSA_T_RT 1 #define LSA_T_NET 2 #define LSA_T_SUM_NET 3 #define LSA_T_SUM_RT 4 #define LSA_T_EXT 5 u32 rt; /* Advertising router */ s32 sn; /* LS Sequence number */ #define LSA_INITSEQNO 0x80000001 #define LSA_MAXSEQNO 0x7fffffff u16 checksum; u16 length; }; struct ospf_lsa_rt { u8 VEB; #define LSA_RT_V 5 #define LSA_RT_E 6 #define LSA_RT_B 7 u8 padding; u16 links; }; struct ospf_lsa_rt_link { u32 id; u32 data; u8 type; #define LSART_PTP 1 #define LSART_NET 2 #define LSART_STUB 3 #define LSART_VLNK 4 u8 notos; u16 metric; }; struct ospf_lsa_rt_link_tos { /* Actually we ignore TOS. This is useless */ u8 tos; u8 padding; u16 metric; }; struct ospf_lsa_net { ip_addr netmask; }; struct ospf_lsa_summ { ip_addr netmask; }; struct ospf_lsa_summ_net { u8 tos; u8 padding; u16 metric; }; struct ospf_lsa_ext { ip_addr netmask; }; struct ospf_lsa_ext_tos { u8 etos; u8 padding; u16 metric; u32 fwaddr; u32 tag; }; struct ospf_lsreq_packet { struct ospf_packet ospf_packet; }; struct ospf_lsreq_header { u16 padd1; u8 padd2; u8 type; u32 id; u32 rt; /* Advertising router */ }; struct l_lsr_head { node n; struct ospf_lsreq_header lsh; }; struct ospf_lsupd_packet { struct ospf_packet ospf_packet; u32 lsano; /* Number of LSA's */ }; struct ospf_lsack_packet { struct ospf_packet ospf_packet; }; struct ospf_neighbor { node n; struct ospf_iface *ifa; u8 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 */ union imms imms; /* I, M, Master/slave received */ u32 dds; /* DD Sequence number being sent */ u32 ddr; /* last Dat Des packet received */ union imms myimms; /* I, M Master/slave */ u32 rid; /* Router ID */ ip_addr ip; /* IP of it's interface */ u8 priority; /* Priority */ u8 options; /* Options received */ u32 dr; /* Neigbour's idea of DR */ u32 bdr; /* Neigbour's idea of BDR */ u8 adj; /* built adjacency? */ siterator dbsi; /* Database summary list iterator */ slist lsrql; /* Link state request */ struct top_graph *lsrqh; /* LSA graph */ siterator lsrqi; slist lsrtl; /* Link state retransmission list */ siterator lsrti; struct top_graph *lsrth; void *ldbdes; /* Last database description packet */ timer *rxmt_timer; /* RXMT timer */ timer *lsrr_timer; /* Link state requiest retransmition timer */ list ackl; timer *ackd_timer; /* Delayed ack timer */ }; /* Definitions for interface state machine */ #define ISM_UP 0 /* Interface Up */ #define ISM_WAITF 1 /* Wait timer fired */ #define ISM_BACKS 2 /* Backup seen */ #define ISM_NEICH 3 /* Neighbor change */ #define ISM_LOOP 4 /* Loop indicated */ #define ISM_UNLOOP 5 /* Unloop indicated */ #define ISM_DOWN 6 /* Interface down */ /* Definitions for neighbor state machine */ #define INM_HELLOREC 0 /* Hello Received */ #define INM_START 1 /* Neighbor start - for NBMA */ #define INM_2WAYREC 2 /* 2-Way received */ #define INM_NEGDONE 3 /* Negotiation done */ #define INM_EXDONE 4 /* Exchange done */ #define INM_BADLSREQ 5 /* Bad LS Request */ #define INM_LOADDONE 6 /* Load done */ #define INM_ADJOK 7 /* AdjOK? */ #define INM_SEQMIS 8 /* Sequence number mismatch */ #define INM_1WAYREC 9 /* 1-Way */ #define INM_KILLNBR 10 /* Kill Neighbor */ #define INM_INACTTIM 11 /* Inactivity timer */ #define INM_LLDOWN 12 /* Line down */ struct ospf_area { node n; u32 areaid; bird_clock_t lage; /* A time of last aging */ timer *age_timer; /* A timer for aging */ struct top_graph *gr; /* LSA graph */ slist lsal; /* List of all LSA's */ struct top_hash_entry *rt; /* My own router LSA */ list cand; /* List of candidates for RT calc. */ u8 stub; u8 trcap; /* Transit capability? */ struct proto_ospf *po; }; struct proto_ospf { struct proto proto; list iface_list; /* Interfaces we really use */ list area_list; int areano; /* Number of area I belong to */ }; static int ospf_start(struct proto *p); static void ospf_dump(struct proto *p); static struct proto *ospf_init(struct proto_config *c); static void ospf_preconfig(struct protocol *p, struct config *c); static void ospf_postconfig(struct proto_config *c); #include "proto/ospf/hello.h" #include "proto/ospf/packet.h" #include "proto/ospf/iface.h" #include "proto/ospf/neighbor.h" #include "proto/ospf/topology.h" #include "proto/ospf/dbdes.h" #include "proto/ospf/lsreq.h" #include "proto/ospf/lsupd.h" #include "proto/ospf/lsack.h" #include "proto/ospf/lsalib.h" #include "proto/ospf/rt.h" #endif /* _BIRD_OSPF_H_ */