mirror of
https://gitlab.nic.cz/labs/bird.git
synced 2024-12-22 17:51:53 +00:00
371 lines
9.2 KiB
C
371 lines
9.2 KiB
C
/*
|
|
* 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_
|
|
|
|
|
|
#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 "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 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 top_hash_entry *nlsa; /* Originated net lsa */
|
|
int fadj; /* Number of full adjacent neigh */
|
|
};
|
|
|
|
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;
|
|
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;
|
|
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 request 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 fib infib; /* FIB for intra-area routes */
|
|
};
|
|
|
|
struct proto_ospf {
|
|
struct proto proto;
|
|
list iface_list; /* Interfaces we really use */
|
|
list area_list;
|
|
int areano; /* Number of area I belong to */
|
|
struct fib efib; /* FIB for external routes */
|
|
};
|
|
|
|
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);
|
|
static int ospf_rte_better(struct rte *new, struct rte *old);
|
|
static int ospf_rte_same(struct rte *new, struct rte *old);
|
|
int ospf_import_control(struct proto *p, rte **new, ea_list **attrs,
|
|
struct linpool *pool);
|
|
void ospf_rt_notify(struct proto *p, net *n, rte *new, rte *old,ea_list *attrs);
|
|
|
|
#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_ */
|