429 lines
10 KiB
C
429 lines
10 KiB
C
/*
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* BIRD -- OSPF
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*
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* (c) 1999 - 2000 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 SIPH SIZE_OF_IP_HEADER
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#define MAXNETS 10
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#ifdef LOCAL_DEBUG
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#define OSPF_FORCE_DEBUG 1
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#else
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#define OSPF_FORCE_DEBUG 0
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#endif
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#define OSPF_TRACE(flags, msg, args...) do { if ((p->debug & flags) || OSPF_FORCE_DEBUG) \
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log(L_TRACE "%s: " msg, p->name , ## args ); } while(0)
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#include "nest/bird.h"
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#include "lib/checksum.h"
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#include "lib/ip.h"
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#include "lib/lists.h"
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#include "lib/slists.h"
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#include "lib/socket.h"
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#include "lib/timer.h"
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#include "lib/resource.h"
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#include "nest/protocol.h"
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#include "nest/iface.h"
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#include "nest/route.h"
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#include "nest/cli.h"
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#include "nest/locks.h"
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#include "conf/conf.h"
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#include "lib/string.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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#define DEFAULTDES ipa_from_u32(0)
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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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#define LSREFRESHTIME 1800 /* 30 minutes */
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#define MINLSINTERVAL 5
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#define MINLSARRIVAL 1
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#define LSINFINITY 0xffff /* RFC says 0xffffff ??? */
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#define DISPTICK 7 /* FIXME What's good value? */
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struct ospf_config {
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struct proto_config c;
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int rfc1583;
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list area_list;
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};
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struct nbma_node {
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node n;
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ip_addr ip;
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};
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struct ospf_area_config {
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node n;
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u32 areaid;
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int stub;
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unsigned tick;
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list patt_list;
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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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struct ospf_area *oa;
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struct object_lock *lock;
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u32 an; /* Area number */
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sock *hello_sk; /* Hello socket */
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sock *dr_sk; /* For states DR or BACKUP */
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sock *ip_sk; /* IP socket (for DD ...) */
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list neigh_list; /* List of neigbours */
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u16 cost; /* Cost of iface */
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u16 rxmtint; /* number of seconds between LSA retransmissions */
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u16 inftransdelay; /* 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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u16 waitint; /* number of sec before changing state from wait */
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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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u8 type; /* OSPF view of type */
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#define OSPF_IT_BCAST 0
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#define OSPF_IT_NBMA 1
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#define OSPF_IT_PTP 2
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#define OSPF_IT_VLINK 3
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#define OSPF_IT_UNDEF 4
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u8 state; /* Interface state machine */
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#define OSPF_IS_DOWN 0 /* Not working */
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#define OSPF_IS_LOOP 1 /* Should never happen */
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#define OSPF_IS_WAITING 2 /* Waiting for Wait timer */
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#define OSPF_IS_PTP 3 /* PTP operational */
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#define OSPF_IS_DROTHER 4 /* I'm on BCAST or NBMA and I'm not DR */
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#define OSPF_IS_BACKUP 5 /* I'm BDR */
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#define OSPF_IS_DR 6 /* 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 INFTRANSDELAY_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 4 /* Value of Wait timer - not found it in RFC
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* - using 4*HELLO
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*/
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struct top_hash_entry *nlsa; /* Originated net lsa */
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int fadj; /* Number of full adjacent neigh */
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list nbma_list;
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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_P 1 /* Hello */
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#define DBDES_P 2 /* Database description */
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#define LSREQ_P 3 /* Link state request */
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#define LSUPD_P 4 /* Link state update */
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#define LSACK_P 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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#define BACKBONE 0
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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 immsb {
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u8 ms:1;
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u8 m:1;
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u8 i:1;
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u8 padding:5;
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};
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union imms {
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u8 byte;
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struct immsb bit;
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};
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struct ospf_dbdes_packet {
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struct ospf_packet ospf_packet;
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u16 iface_mtu;
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u8 options;
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union imms imms; /* I, M, MS bits */
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#define DBDES_MS 1
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#define DBDES_M 2
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#define DBDES_I 4
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u32 ddseq;
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};
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struct ospf_lsa_header {
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u16 age; /* LS Age */
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#define LSA_MAXAGE 3600 /* 1 hour */
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#define LSA_CHECKAGE 300 /* 5 minutes */
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#define LSA_MAXAGEDIFF 900 /* 15 minutes */
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u8 options;
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u8 type;
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u32 id;
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#define LSA_T_RT 1
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#define LSA_T_NET 2
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#define LSA_T_SUM_NET 3
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#define LSA_T_SUM_RT 4
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#define LSA_T_EXT 5
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u32 rt; /* Advertising router */
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s32 sn; /* LS Sequence number */
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#define LSA_INITSEQNO 0x80000001
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#define LSA_MAXSEQNO 0x7fffffff
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u16 checksum;
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u16 length;
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};
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struct ospf_lsa_rt {
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u8 VEB;
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#define LSA_RT_V 5
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#define LSA_RT_E 6
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#define LSA_RT_B 7
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u8 padding;
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u16 links;
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};
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struct ospf_lsa_rt_link {
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u32 id;
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u32 data;
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u8 type;
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#define LSART_PTP 1
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#define LSART_NET 2
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#define LSART_STUB 3
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#define LSART_VLNK 4
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u8 notos;
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u16 metric;
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};
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struct ospf_lsa_rt_link_tos { /* Actually we ignore TOS. This is useless */
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u8 tos;
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u8 padding;
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u16 metric;
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};
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struct ospf_lsa_net {
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ip_addr netmask;
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};
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struct ospf_lsa_summ {
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ip_addr netmask;
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};
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struct ospf_lsa_summ_net {
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u8 tos;
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u8 padding;
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u16 metric;
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};
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struct ospf_lsa_ext {
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ip_addr netmask;
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};
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struct ospf_lsa_ext_tos {
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u8 etos;
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u8 padding;
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u16 metric;
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ip_addr fwaddr;
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u32 tag;
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};
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struct ospf_lsreq_packet {
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struct ospf_packet ospf_packet;
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};
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struct ospf_lsreq_header {
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u16 padd1;
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u8 padd2;
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u8 type;
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u32 id;
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u32 rt; /* Advertising router */
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};
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struct l_lsr_head {
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node n;
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struct ospf_lsreq_header lsh;
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};
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struct ospf_lsupd_packet {
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struct ospf_packet ospf_packet;
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u32 lsano; /* Number of LSA's */
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};
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struct ospf_lsack_packet {
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struct ospf_packet ospf_packet;
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};
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struct ospf_neighbor
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{
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node n;
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struct ospf_iface *ifa;
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u8 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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union imms imms; /* I, M, Master/slave received */
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u32 dds; /* DD Sequence number being sent */
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u32 ddr; /* last Dat Des packet received */
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union imms myimms; /* I, M Master/slave */
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u32 rid; /* Router ID */
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ip_addr ip; /* IP of it's interface */
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u8 priority; /* Priority */
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u8 options; /* Options received */
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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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u8 adj; /* built adjacency? */
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siterator dbsi; /* Database summary list iterator */
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slist lsrql; /* Link state request */
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struct top_graph *lsrqh; /* LSA graph */
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siterator lsrqi;
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slist lsrtl; /* Link state retransmission list */
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siterator lsrti;
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struct top_graph *lsrth;
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void *ldbdes; /* Last database description packet */
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timer *rxmt_timer; /* RXMT timer */
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timer *lsrr_timer; /* Link state request retransmition timer */
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list ackl;
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timer *ackd_timer; /* Delayed ack timer */
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};
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/* Definitions for interface state machine */
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#define ISM_UP 0 /* Interface Up */
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#define ISM_WAITF 1 /* Wait timer fired */
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#define ISM_BACKS 2 /* Backup seen */
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#define ISM_NEICH 3 /* Neighbor change */
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#define ISM_LOOP 4 /* Loop indicated */
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#define ISM_UNLOOP 5 /* Unloop indicated */
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#define ISM_DOWN 6 /* Interface down */
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/* Definitions for neighbor state machine */
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#define INM_HELLOREC 0 /* Hello Received */
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#define INM_START 1 /* Neighbor start - for NBMA */
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#define INM_2WAYREC 2 /* 2-Way received */
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#define INM_NEGDONE 3 /* Negotiation done */
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#define INM_EXDONE 4 /* Exchange done */
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#define INM_BADLSREQ 5 /* Bad LS Request */
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#define INM_LOADDONE 6 /* Load done */
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#define INM_ADJOK 7 /* AdjOK? */
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#define INM_SEQMIS 8 /* Sequence number mismatch */
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#define INM_1WAYREC 9 /* 1-Way */
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#define INM_KILLNBR 10 /* Kill Neighbor */
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#define INM_INACTTIM 11 /* Inactivity timer */
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#define INM_LLDOWN 12 /* Line down */
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struct ospf_area {
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node n;
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u32 areaid;
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timer *disp_timer; /* Area's dispatcher hear beat */
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bird_clock_t lage; /* Time of last aging */
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int calcrt; /* Routing table calculation scheduled? */
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int origrt; /* Rt lsa origination scheduled? */
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struct top_graph *gr; /* LSA graph */
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slist lsal; /* List of all LSA's */
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struct top_hash_entry *rt; /* My own router LSA */
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list cand; /* List of candidates for RT calc. */
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int stub;
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int trcap; /* Transit capability? */
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struct proto_ospf *po;
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struct fib infib; /* FIB for intra-area routes */
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unsigned tick;
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};
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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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list area_list;
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int areano; /* Number of area I belong to */
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struct fib efib; /* FIB for external routes */
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int rfc1583;
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};
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struct ospf_iface_patt {
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struct iface_patt i;
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int cost;
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int helloint;
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int rxmtint;
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int inftransdelay;
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int priority;
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int waitint;
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int deadc;
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int type;
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int autype;
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#define AU_NONE 0
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#define AU_SIMPLE 1
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#define AU_CRYPT 2
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u8 password[8];
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list nbma_list;
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};
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static int ospf_start(struct proto *p);
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static void ospf_dump(struct proto *p);
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static struct proto *ospf_init(struct proto_config *c);
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static void ospf_preconfig(struct protocol *p, struct config *c);
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static void ospf_postconfig(struct proto_config *c);
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static int ospf_rte_better(struct rte *new, struct rte *old);
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static int ospf_rte_same(struct rte *new, struct rte *old);
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int ospf_import_control(struct proto *p, rte **new, ea_list **attrs,
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struct linpool *pool);
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struct ea_list *ospf_make_tmp_attrs(struct rte *rt, struct linpool *pool);
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void ospf_store_tmp_attrs(struct rte *rt, struct ea_list *attrs);
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void ospf_rt_notify(struct proto *p, net *n, rte *new, rte *old,ea_list *attrs);
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void area_disp(timer *timer);
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void schedule_rt_lsa(struct ospf_area *oa);
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void schedule_rtcalc(struct ospf_area *oa);
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void ospf_sh_neigh(struct proto *p, char *iff);
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void ospf_sh(struct proto *p);
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void ospf_sh_iface(struct proto *p, char *iff);
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#define EA_OSPF_METRIC1 EA_CODE(EAP_OSPF, 0)
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#define EA_OSPF_METRIC2 EA_CODE(EAP_OSPF, 1)
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#define EA_OSPF_TAG EA_CODE(EAP_OSPF, 2)
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#include "proto/ospf/hello.h"
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#include "proto/ospf/packet.h"
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#include "proto/ospf/iface.h"
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#include "proto/ospf/neighbor.h"
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#include "proto/ospf/topology.h"
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#include "proto/ospf/dbdes.h"
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#include "proto/ospf/lsreq.h"
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#include "proto/ospf/lsupd.h"
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#include "proto/ospf/lsack.h"
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#include "proto/ospf/lsalib.h"
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#include "proto/ospf/rt.h"
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#endif /* _BIRD_OSPF_H_ */
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