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bird/proto/ospf/ospf.h

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/*
* BIRD -- OSPF
*
* (c) 1999 - 2000 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 SIZE_OF_IP_HEADER
#define MAXNETS 10
#ifdef LOCAL_DEBUG
#define OSPF_FORCE_DEBUG 1
#else
#define OSPF_FORCE_DEBUG 0
#endif
#define OSPF_TRACE(flags, msg, args...) do { if ((p->debug & flags) || OSPF_FORCE_DEBUG) \
log(L_TRACE "%s: " msg, p->name , ## args ); } while(0)
#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 "nest/cli.h"
#include "nest/locks.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 DISPTICK 7
struct ospf_config {
struct proto_config c;
int rfc1583;
list area_list;
};
struct nbma_node {
node n;
ip_addr ip;
int eligible;
};
struct area_net {
node n;
ip_addr net;
int mlen;
int hidden;
};
struct ospf_area_config {
node n;
u32 areaid;
int stub;
unsigned tick;
list patt_list;
list net_list;
};
struct ospf_iface {
node n;
struct proto_ospf *proto;
struct iface *iface; /* Nest's iface */
struct ospf_area *oa;
struct object_lock *lock;
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 */
u16 pollint; /* Poll interval */
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
#define OSPF_IT_UNDEF 4
u8 strictnbma; /* Can I talk with unknown neighbors? */
u8 stub; /* Inactive interface */
u8 ioprob;
#define OSPF_I_OK 0 /* Everything OK */
#define OSPF_I_MC 1 /* I didn't open MC socket */
#define OSPF_I_IP 2 /* I didn't open IP socet */
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 *poll_timer; /* Poll Interval - for NBMA */
/* 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 POLLINT_D 20
#define DEADC_D 4
#define WAIT_DMH 4 /* Value of Wait timer - not found it in RFC
* - using 4*HELLO
*/
struct top_hash_entry *nlsa; /* Originated net lsa */
int orignet; /* Schedule network LSA origination */
int fadj; /* Number of full adjacent neigh */
list nbma_list;
};
struct ospf_packet {
u8 version;
u8 type;
#define HELLO_P 1 /* Hello */
#define DBDES_P 2 /* Database description */
#define LSREQ_P 3 /* Link state request */
#define LSUPD_P 4 /* Link state update */
#define LSACK_P 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;
ip_addr dr;
ip_addr bdr;
};
struct immsb {
#ifdef _BIG_ENDIAN
u8 padding:5;
u8 i:1;
u8 m:1;
u8 ms:1;
#else
u8 ms:1;
u8 m:1;
u8 i:1;
u8 padding:5;
#endif
};
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 vebb {
u8 b:1;
u8 e:1;
u8 v:1;
u8 padding:5;
};
union veb {
u8 byte;
struct vebb bit;
};
struct ospf_lsa_rt {
union veb 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 */
ip_addr dr; /* Neigbour's idea of DR */
ip_addr 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;
timer *disp_timer; /* Area's dispatcher hear beat */
int calcrt; /* Routing table calculation scheduled? */
int origrt; /* Rt lsa origination scheduled? */
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. */
list net_list; /* Networks to advertise or not */
int stub;
int trcap; /* Transit capability? */
struct proto_ospf *po;
struct fib infib; /* FIB for intra-area routes */
unsigned tick;
};
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 */
int rfc1583; /* RFC1583 compatibility */
int ebit; /* Did I originate any ext lsa? */
};
struct ospf_iface_patt {
struct iface_patt i;
int cost;
int helloint;
int rxmtint;
int pollint;
int inftransdelay;
int priority;
int waitint;
int deadc;
int type;
int autype;
int strictnbma;
int stub;
#define AU_NONE 0
#define AU_SIMPLE 1
#define AU_CRYPT 2
u8 password[8];
list nbma_list;
};
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);
struct ea_list *ospf_make_tmp_attrs(struct rte *rt, struct linpool *pool);
void ospf_store_tmp_attrs(struct rte *rt, struct ea_list *attrs);
void ospf_rt_notify(struct proto *p, net *n, rte *new, rte *old,ea_list *attrs);
void area_disp(timer *timer);
void schedule_rt_lsa(struct ospf_area *oa);
void schedule_rtcalc(struct ospf_area *oa);
void ospf_sh_neigh(struct proto *p, char *iff);
void ospf_sh(struct proto *p);
void ospf_sh_iface(struct proto *p, char *iff);
#define EA_OSPF_METRIC1 EA_CODE(EAP_OSPF, 0)
#define EA_OSPF_METRIC2 EA_CODE(EAP_OSPF, 1)
#define EA_OSPF_TAG EA_CODE(EAP_OSPF, 2)
#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_ */
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