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/*
* BIRD -- OSPF
*
* (c) 1999 Ondrej Filip <feela@network.cz>
*
* Can be freely distributed and used under the terms of the GNU GPL.
*/
#ifndef _BIRD_OSPF_H_
#define _BIRD_OSPF_H_
#include "lib/ip.h"
#include "lib/lists.h"
#include "lib/socket.h"
#include "lib/timer.h"
#include "lib/resource.h"
#include "nest/protocol.h"
#include "nest/iface.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 */
u16 rxmtint; /* number of seconds between LSA retransmissions */
u16 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 */
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 */
timer *rxmt_timer; /* RXMT 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 3 /* Value of Wait timer - not found it in RFC
* - using 3*HELLO
*/
};
struct ospf_patt {
struct iface_patt i;
u16 cost;
u8 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_dbdes_packet {
struct ospf_packet ospf_packet;
u16 iface_mtu;
u8 options;
u8 imms; /* I, M, MS bits */
#define DBDES_MS 1
#define DBDES_M 2
#define DBDES_I 4
u32 ddseq;
};
struct ospf_lsaheader {
u16 lsage; /* LS Age */
u8 options;
u8 lstype;
u32 lsid;
u32 advr; /* Advertising router */
u32 lssn; /* LS Sequence number */
u16 checksum;
u16 length;
};
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 */
u8 imms; /* I, M, Master/slave */
u32 dds; /* DD Sequence number being sent */
u32 ddr; /* last Dat Des packet received */
u8 myimms; /* I, M MS received */
u8 myoptions; /* Options received */
u32 rid; /* Router ID */
u8 priority; /* Priority */
u8 options; /* Options */
u32 dr; /* Neigbour's idea of DR */
u32 bdr; /* Neigbour's idea of BDR */
u8 adj; /* built adjacency? */
};
/* 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 */
/* topology.c: Representation of network topology (LS graph) */
struct top_hash_entry { /* Index for fast mapping (type,rtrid,LSid)->vertex */
struct top_hash_entry *next; /* Next in hash chain */
struct top_vertex *vertex;
u32 lsa_id, rtr_id;
u16 lsa_type;
u16 pad;
};
struct top_graph {
pool *pool; /* Pool we allocate from */
slab *hash_slab; /* Slab for hash entries */
struct top_hash_entry **hash_table; /* Hashing (modelled a`la fib) */
unsigned int hash_size;
unsigned int hash_order;
unsigned int hash_mask;
unsigned int hash_entries;
unsigned int hash_entries_min, hash_entries_max;
};
struct top_graph *ospf_top_new(struct proto_ospf *);
void ospf_top_free(struct top_graph *);
void ospf_top_dump(struct top_graph *);
struct top_hash_entry *ospf_hash_find(struct top_graph *, u32 lsa, u32 rtr, u32 type);
struct top_hash_entry *ospf_hash_get(struct top_graph *, u32 lsa, u32 rtr, u32 type);
void ospf_hash_delete(struct top_graph *, struct top_hash_entry *);
#endif /* _BIRD_OSPF_H_ */
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