bird/proto/ospf/ospf.c

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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.
*/
#define LOCAL_DEBUG
#include <string.h>
#include "nest/bird.h"
#include "nest/iface.h"
#include "nest/protocol.h"
#include "nest/route.h"
#include "conf/conf.h"
#include "lib/ip.h"
#include "lib/socket.h"
#include "lib/lists.h"
#include "lib/timer.h"
#include "ospf.h"
int
ospf_rx_hook(sock *sk, int size)
{
DBG(" OSPF: RX_Hook called on interface ");
DBG(sk->iface->name);
DBG(".\n");
return(1);
}
void
ospf_tx_hook(sock *sk)
{
DBG(" OSPF: TX_Hook called on interface ");
DBG(sk->iface->name);
DBG(".\n");
}
void
ospf_err_hook(sock *sk, int err)
{
DBG(" OSPF: Err_Hook called on interface ");
DBG(sk->iface->name);
DBG(".\n");
}
/* This will change ! */
sock *
ospf_open_socket(struct proto *p, struct ospf_iface *ifa)
{
sock *mcsk;
/* No NBMA networks now */
if(ifa->iface->flags & IF_MULTICAST)
{
mcsk=sk_new(p->pool);
mcsk->type=SK_IP_MC;
mcsk->dport=OSPF_PROTO;
mcsk->saddr=AllSPFRouters;
mcsk->daddr=AllSPFRouters;
mcsk->ttl=1;
mcsk->rx_hook=ospf_rx_hook;
mcsk->tx_hook=ospf_tx_hook;
mcsk->err_hook=ospf_err_hook;
mcsk->iface=ifa->iface;
mcsk->rbsize=ifa->iface->mtu;
mcsk->tbsize=ifa->iface->mtu;
if(sk_open(mcsk)!=0)
{
DBG(" OSPF: SK_OPEN: failed\n");
return(NULL);
}
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DBG(" OSPF: SK_OPEN: open\n");
return(mcsk);
}
else return(NULL);
}
/*
* This will later decide, wheter use iface for OSPF or not
* depending on config
*/
int
is_good_iface(struct proto *p, struct iface *iface)
{
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if(iface->flags & IF_UP)
{
if(!(iface->flags & IF_IGNORE)) return 1;
}
return 0;
}
/* Of course, it's NOT true now */
int
ospf_iface_clasify(struct iface *ifa)
{
/* FIXME: Latter I'll use config - this is incorrect */
if((ifa->flags & (IF_MULTIACCESS|IF_MULTICAST))==
(IF_MULTIACCESS|IF_MULTICAST))
{
DBG(" OSPF: Clasifying BROADCAST.\n");
return OSPF_IT_BROADCAST;
}
if((ifa->flags & (IF_MULTIACCESS|IF_MULTICAST))==
IF_MULTIACCESS)
{
DBG(" OSPF: Clasifying NBMA.\n");
return OSPF_IT_NBMA;
}
DBG(" OSPF: Clasifying P-T-P.\n");
return OSPF_IT_PTP;
}
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void
hello_timer_hook(timer *timer)
{
struct ospf_iface *ifa;
ifa=(struct ospf_iface *)timer->data;
debug(" OSPF: Hello timer fired on interface %s.\n",
ifa->iface->name);
}
void
add_hello_timer(struct ospf_iface *ifa)
{
if(ifa->helloint==0) ifa->helloint=HELLOINT_D;
ifa->timer->hook=hello_timer_hook;
ifa->timer->recurrent=ifa->helloint;
ifa->timer->expires=0;
tm_start(ifa->timer,0);
DBG(" OSPF: Installing hello timer.\n");
}
void
wait_timer_hook(timer *timer)
{
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struct ospf_iface *ifa;
ifa=(struct ospf_iface *)timer->data;
debug(" OSPF: Wait timer fired on interface %s.\n",
ifa->iface->name);
if(ifa->state=OSPF_IS_WAITING)
{
/*
* Wait time fired. Now we must change state
* to DR or DROTHER depending on priority
*/
if(ifa->priority!=0)
{
debug(" OSPF: Changing state into DR.\n");
ifa->state=OSPF_IS_DR;
ifa->drip=ifa->iface->ip;
/* FIXME: Set ifa->drid */
}
else
{
debug(" OSPF: Changing state into DROTHER.\n");
ifa->state=OSPF_IS_DROTHER;
}
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add_hello_timer(ifa);
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}
}
void
add_wait_timer(struct ospf_iface *ifa,pool *pool, int wait)
{
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ifa->timer=tm_new(pool);
ifa->timer->data=ifa;
ifa->timer->randomize=1;
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if((ifa->type!=OSPF_IT_PTP))
{
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ifa->timer->hook=wait_timer_hook;
ifa->timer->recurrent=0;
ifa->timer->expires=0;
tm_start(ifa->timer,(wait!=0 ? wait : WAIT_D));
DBG(" OSPF: Installing wait timer.\n");
}
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else
{
add_hello_timer(ifa);
}
}
void
ospf_iface_default(struct ospf_iface *ifa)
{
int i;
ifa->area=0;
ifa->cost=COST_D;
ifa->rxmtint=RXMTINT_D;
ifa->iftransdelay=IFTRANSDELAY_D;
ifa->priority=PRIORITY_D;
ifa->helloint=HELLOINT_D;
ifa->deadint=DEADINT_D;
ifa->autype=0;
for(i=0;i<8;i++) ifa->aukey[i]=0;
ifa->options=0;
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ifa->drip=ipa_from_u32(0x00000000);
ifa->drid=0;
ifa->bdrip=ipa_from_u32(0x00000000);
ifa->bdrid=0;
ifa->type=ospf_iface_clasify(ifa->iface);
}
struct ospf_iface*
find_iface(struct proto_ospf *p, struct iface *what)
{
struct ospf_iface *i;
WALK_LIST (i, p->iface_list)
if ((i)->iface == what)
return i;
return NULL;
}
void
ospf_if_notify(struct proto *p, unsigned flags, struct iface *new, struct iface *old)
{
struct ospf_iface *ifa;
sock *mcsk, *newsk;
struct ospf_sock *osk;
struct ospf_config *c;
c=(struct ospf_config *)(p->cf);
DBG(" OSPF: If notify called\n");
if((flags & IF_CHANGE_UP) && is_good_iface(p, new))
{
debug(" OSPF: using interface %s.\n", new->name);
/* FIXME: Latter I'll use config - this is incorrect */
ifa=mb_alloc(p->pool, sizeof(struct ospf_iface));
ifa->iface=new;
add_tail(&((struct proto_ospf *)p)->iface_list, NODE ifa);
ospf_iface_default(ifa);
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/* FIXME: This should read config */
add_wait_timer(ifa,p->pool,0);
init_list(&(ifa->sk_list));
if((mcsk=ospf_open_socket(p, ifa))!=NULL)
{
osk=(struct ospf_sock *)mb_alloc(p->pool, sizeof(struct ospf_sock));
osk->sk=mcsk;
add_tail(&(ifa->sk_list),NODE osk);
}
}
if(flags & IF_CHANGE_DOWN)
{
if((ifa=find_iface((struct proto_ospf *)p, old))!=NULL)
{
debug(" OSPF: killing interface %s.\n", old->name);
}
}
if(flags & IF_CHANGE_MTU)
{
if((ifa=find_iface((struct proto_ospf *)p, old))!=NULL)
{
debug(" OSPF: changing MTU on interface %s.\n", old->name);
}
}
}
static int
ospf_start(struct proto *p)
{
DBG(" OSPF: Start\n");
p->if_notify=ospf_if_notify;
return PS_UP;
}
static void
ospf_dump(struct proto *p)
{
char areastr[20];
struct ospf_config *c = (void *) p->cf;
DBG(" OSPF: Dump.\n");
debug(" -AreaID: %d\n", c->area );
}
static struct proto *
ospf_init(struct proto_config *c)
{
struct proto *p = proto_new(c, sizeof(struct proto_ospf));
DBG(" OSPF: Init.\n");
p->neigh_notify = NULL;
p->if_notify = NULL;
init_list(&((struct proto_ospf *)p)->iface_list);
return p;
}
static void
ospf_preconfig(struct protocol *p, struct config *c)
{
DBG( " OSPF: preconfig\n" );
}
static void
ospf_postconfig(struct proto_config *c)
{
DBG( " OSPF: postconfig\n" );
}
struct protocol proto_ospf = {
name: "OSPF",
init: ospf_init,
dump: ospf_dump,
start: ospf_start,
preconfig: ospf_preconfig,
postconfig: ospf_postconfig,
};