mirror of
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4ef3dccfa1
network byte order thus breaking interoperability with other routing daemons on litte endian machines. The patch fixes this but note that this breaks compatability with older bird installations using OSPF and password authentication (Andreas)
473 lines
11 KiB
C
473 lines
11 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
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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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int eligible;
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};
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struct area_net {
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node n;
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ip_addr net;
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int mlen;
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int hidden;
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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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list net_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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u16 pollint; /* Poll interval */
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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 strictnbma; /* Can I talk with unknown neighbors? */
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u8 stub; /* Inactive interface */
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u8 ioprob;
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#define OSPF_I_OK 0 /* Everything OK */
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#define OSPF_I_MC 1 /* I didn't open MC socket */
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#define OSPF_I_IP 2 /* I didn't open IP socet */
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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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timer *poll_timer; /* Poll Interval - for NBMA */
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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 POLLINT_D 20
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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 orignet; /* Schedule network LSA origination */
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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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ip_addr dr;
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ip_addr bdr;
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};
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struct immsb {
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#ifdef _BIG_ENDIAN
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u8 padding:5;
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u8 i:1;
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u8 m:1;
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u8 ms:1;
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#else
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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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#endif
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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 vebb {
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u8 b:1;
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u8 e:1;
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u8 v:1;
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u8 padding:5;
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};
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union veb {
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u8 byte;
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struct vebb bit;
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};
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struct ospf_lsa_rt {
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union veb 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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ip_addr dr; /* Neigbour's idea of DR */
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ip_addr 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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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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list net_list; /* Networks to advertise or not */
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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; /* RFC1583 compatibility */
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int ebit; /* Did I originate any ext lsa? */
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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 pollint;
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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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int strictnbma;
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int stub;
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/* must be in network byte order */
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#define AU_NONE htons(0)
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#define AU_SIMPLE htons(1)
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#define AU_CRYPT htons(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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