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