/* * BIRD -- OSPF * * (c) 1999--2005 Ondrej Filip * * Can be freely distributed and used under the terms of the GNU GPL. */ #ifndef _BIRD_OSPF_H_ #define _BIRD_OSPF_H_ #define MAXNETS 10 #define OSPF_VLINK_MTU 576 /* RFC2328 - A.1 */ #define OSPF_MAX_PKT_SIZE 65536 /* * RFC 2328 says, maximum packet size is 65535 * This could be too much for small systems, so I * normally allocate 2*mtu - (I found one cisco * sending packets mtu+16) */ #ifdef LOCAL_DEBUG #define OSPF_FORCE_DEBUG 1 #else #define OSPF_FORCE_DEBUG 0 #endif #define OSPF_TRACE(flags, msg, args...) do { if ((p->debug & flags) || OSPF_FORCE_DEBUG) \ log(L_TRACE "%s: " msg, p->name , ## args ); } while(0) #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 "nest/cli.h" #include "nest/locks.h" #include "conf/conf.h" #include "lib/string.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 */ #define DEFAULTDES ipa_from_u32(0) #else #error OSPF for IPv6 is not implemented (mail to Feela ) #endif #define LSREFRESHTIME 1800 /* 30 minutes */ #define MINLSINTERVAL 5 #define MINLSARRIVAL 1 #define LSINFINITY 0xffffff #define DEFAULT_OSPFTICK 1 #define DEFAULT_RFC1583 0 /* compatibility with rfc1583 */ #define DEFAULT_STUB_COST 1000 struct ospf_config { struct proto_config c; unsigned tick; int rfc1583; list area_list; }; struct nbma_node { node n; ip_addr ip; int eligible; }; struct area_net_config { node n; struct prefix px; int hidden; }; struct area_net { struct fib_node fn; int hidden; int active; u32 metric; }; struct ospf_area_config { node n; u32 areaid; int stub; list patt_list; list vlink_list; list net_list; }; struct obits { #ifdef _BIG_ENDIAN u8 unused2:2; u8 dc:1; u8 ea:1; u8 np:1; u8 mc:1; u8 e:1; u8 unused1:1; #else u8 unused1:1; u8 e:1; u8 mc:1; u8 np:1; u8 ea:1; u8 dc:1; u8 unused2:2; #endif }; union options { u8 byte; struct obits bit; }; struct ospf_iface { node n; struct iface *iface; /* Nest's iface */ struct ospf_area *oa; struct object_lock *lock; 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 */ u32 cost; /* Cost of iface */ u32 waitint; /* number of sec before changing state from wait */ u32 rxmtint; /* number of seconds between LSA retransmissions */ u32 pollint; /* Poll interval */ u32 dead; /* after "deadint" missing hellos is router dead */ u32 vid; /* Id of peer of virtual link */ ip_addr vip; /* IP of peer of virtual link */ struct ospf_area *voa; /* Area wich the vlink goes through */ u16 inftransdelay; /* The estimated number of seconds it takes to transmit a Link State Update Packet over this interface. LSAs contained in the update */ u16 autype; u16 helloint; /* number of seconds between hello sending */ list *passwords; u32 csn; /* Crypt seq num. that will be sent net */ 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 #define OSPF_IT_UNDEF 4 u8 strictnbma; /* Can I talk with unknown neighbors? */ u8 stub; /* Inactive interface */ #define OSPF_I_OK 0 /* Everything OK */ #define OSPF_I_MC 1 /* I didn't open MC socket */ #define OSPF_I_IP 2 /* I didn't open IP socet */ 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 */ timer *poll_timer; /* Poll Interval - for NBMA */ /* 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 POLLINT_D 20 #define DEADC_D 4 #define WAIT_DMH 4 /* Value of Wait timer - not found it in RFC * - using 4*HELLO */ struct top_hash_entry *nlsa; /* Originated net lsa */ int orignet; /* Schedule network LSA origination */ int fadj; /* Number of full adjacent neigh */ list nbma_list; u8 priority; /* A router priority for DR election */ u8 ioprob; u32 rxbuf; }; struct ospf_md5 { u16 zero; u8 keyid; u8 len; u32 csn; }; union ospf_auth { u8 password[8]; struct ospf_md5 md5; }; struct ospf_packet { u8 version; u8 type; #define HELLO_P 1 /* Hello */ #define DBDES_P 2 /* Database description */ #define LSREQ_P 3 /* Link state request */ #define LSUPD_P 4 /* Link state update */ #define LSACK_P 5 /* Link state acknowledgement */ u16 length; u32 routerid; u32 areaid; #define BACKBONE 0 u16 checksum; u16 autype; union ospf_auth u; }; struct ospf_hello_packet { struct ospf_packet ospf_packet; ip_addr netmask; u16 helloint; u8 options; u8 priority; u32 deadint; ip_addr dr; ip_addr bdr; }; struct immsb { #ifdef _BIG_ENDIAN u8 padding:5; u8 i:1; u8 m:1; u8 ms:1; #else u8 ms:1; u8 m:1; u8 i:1; u8 padding:5; #endif }; 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 vebb { #ifdef _BIG_ENDIAN u8 padding:5; u8 v:1; u8 e:1; u8 b:1; #else u8 b:1; u8 e:1; u8 v:1; u8 padding:5; #endif }; union veb { u8 byte; struct vebb bit; }; struct ospf_lsa_rt { union veb veb; 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_sum { ip_addr netmask; }; struct ospf_lsa_ext { ip_addr netmask; }; struct ospf_lsa_ext_etos { #ifdef _BIG_ENDIAN u8 ebit:1; u8 tos:7; u8 padding1; u16 padding2; #else u16 padding2; u8 padding1; u8 tos:7; u8 ebit:1; #endif }; #define METRIC_MASK 0x00FFFFFF struct ospf_lsa_sum_tos { #ifdef _BIG_ENDIAN u8 tos; u8 padding1; u16 padding2; #else u16 padding2; u8 padding1; u8 tos; #endif }; union ospf_lsa_sum_tm { struct ospf_lsa_sum_tos tos; u32 metric; }; union ospf_lsa_ext_etm { struct ospf_lsa_ext_etos etos; u32 metric; }; struct ospf_lsa_ext_tos { union ospf_lsa_ext_etm etm; ip_addr 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; pool *pool; 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 */ ip_addr dr; /* Neigbour's idea of DR */ ip_addr 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 */ list ackl[2]; #define ACKL_DIRECT 0 #define ACKL_DELAY 1 timer *ackd_timer; /* Delayed ack timer */ u32 csn; /* Last received crypt seq number (for MD5) */ }; /* 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; int origrt; /* Rt lsa origination scheduled? */ struct top_hash_entry *rt; /* My own router LSA */ list cand; /* List of candidates for RT calc. */ struct fib net_fib; /* Networks to advertise or not */ int stub; int trcap; /* Transit capability? */ struct proto_ospf *po; struct fib rtr; /* Routing tables for routers */ union options opt; /* RFC2328 - A.2 */ }; struct proto_ospf { struct proto proto; timer *disp_timer; /* OSPF proto dispatcher */ unsigned tick; struct top_graph *gr; /* LSA graph */ slist lsal; /* List of all LSA's */ int calcrt; /* Routing table calculation scheduled? */ int cleanup; /* Should I cleanup after RT calculation? */ list iface_list; /* Interfaces we really use */ list area_list; int areano; /* Number of area I belong to */ struct fib rtf; /* Routing table */ int rfc1583; /* RFC1583 compatibility */ int ebit; /* Did I originate any ext lsa? */ struct ospf_area *backbone; /* If exists */ }; struct ospf_iface_patt { struct iface_patt i; u32 cost; u32 helloint; u32 rxmtint; u32 pollint; u32 inftransdelay; u32 priority; u32 waitint; u32 deadc; u32 dead; u32 type; u32 autype; u32 strictnbma; u32 stub; u32 vid; #define OSPF_AUTH_NONE 0 #define OSPF_AUTH_SIMPLE 1 #define OSPF_AUTH_CRYPT 2 #define OSPF_AUTH_CRYPT_SIZE 16 u32 rxbuf; #define OSPF_RXBUF_NORMAL 0 #define OSPF_RXBUF_LARGE 1 #define OSPF_RXBUF_MINSIZE 256 /* Minimal allowed size */ list *passwords; list nbma_list; }; int ospf_import_control(struct proto *p, rte **new, ea_list **attrs, struct linpool *pool); struct ea_list *ospf_make_tmp_attrs(struct rte *rt, struct linpool *pool); void ospf_store_tmp_attrs(struct rte *rt, struct ea_list *attrs); void ospf_rt_notify(struct proto *p, net *n, rte *new, rte *old, ea_list * attrs); void schedule_rt_lsa(struct ospf_area *oa); void schedule_rtcalc(struct proto_ospf *po); void schedule_net_lsa(struct ospf_iface *ifa); void ospf_sh_neigh(struct proto *p, char *iff); void ospf_sh(struct proto *p); void ospf_sh_iface(struct proto *p, char *iff); #define EA_OSPF_METRIC1 EA_CODE(EAP_OSPF, 0) #define EA_OSPF_METRIC2 EA_CODE(EAP_OSPF, 1) #define EA_OSPF_TAG EA_CODE(EAP_OSPF, 2) #include "proto/ospf/rt.h" #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" #endif /* _BIRD_OSPF_H_ */