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Bird now uses fib structure instead of linklist.

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This commit is contained in:
Pavel Machek 1998-12-22 19:41:04 +00:00
parent 1d7c44b711
commit 6996f459c6
3 changed files with 96 additions and 142 deletions
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8
proto/rip/config.Y
View file

@ -4,6 +4,14 @@
* Can be freely distributed and used under the terms of the GNU GPL. * Can be freely distributed and used under the terms of the GNU GPL.
*/ */
/*
To add:
passive option (== do not send routing updates to this interface)
CF_HDR CF_HDR
#include "proto/rip/rip.h" #include "proto/rip/rip.h"

218
proto/rip/rip.c
View file

@ -31,73 +31,6 @@ rip_reply(struct proto *p)
#endif #endif
} }
/*
* Entries
*/
static struct rip_entry *
new_entry( struct proto *p )
{
struct rip_entry *e;
e = mb_alloc(p->pool, sizeof( struct rip_entry ));
bzero( e, sizeof( struct rip_entry ));
return e;
}
static struct rip_entry *
find_entry( struct proto *p, ip_addr network, int pxlen )
{
struct node *e;
CHK_MAGIC;
WALK_LIST( e, P->rtable ) {
if (ipa_equal( network, E->network ) &&
(pxlen == E->pxlen)) {
return E;
}
}
return NULL;
}
/* Delete one of entries */
static void
kill_entry_ourrt( struct proto *p, struct rip_entry *e )
{
struct rip_connection *c;
net *n;
rem_node( NODE e );
WALK_LIST( c, P->connections ) {
if (c->sendptr == e) {
DBG( "Deleting from under someone's sendptr...\n" );
c->sendptr = (void *) (NODE c->sendptr)->next;
}
}
mb_free( e );
}
#if 0
/* Currently unreferenced, and likely may stay that way */
/* Delete one of entries */
static void
kill_entry_mainrt( struct proto *p, struct rip_entry *e )
{
struct rip_connection *c;
net *n;
n = net_find(&master_table, 0, e->network, e->pxlen );
if (!n) log( L_ERR "Could not find entry to delete in main routing table." );
else rte_update( n, p, NULL );
}
static void
kill_entry( struct proto *p, struct rip_entry *e )
{
kill_entry_mainrt( p, e );
kill_entry_ourrt( p, e );
}
#endif
/* /*
* Output processing * Output processing
*/ */
@ -117,59 +50,70 @@ rip_tx( sock *s )
struct rip_connection *c = rif->busy; struct rip_connection *c = rif->busy;
struct proto *p = c->proto; struct proto *p = c->proto;
struct rip_packet *packet = (void *) s->tbuf; struct rip_packet *packet = (void *) s->tbuf;
int i, done = 0; int i;
givemore: do {
DBG( "Preparing packet to send: " ); if (c->done) {
DBG( "Looks like I'm" );
if (!(NODE c->sendptr)->next) { c->rif->busy = NULL;
DBG( "Looks like I'm" ); rem_node(NODE c);
c->rif->busy = NULL; mb_free(c);
rem_node(NODE c); DBG( " done\n" );
mb_free(c); return;
DBG( " done\n" );
return;
}
packet->heading.command = RIPCMD_RESPONSE;
packet->heading.version = RIP_V2;
packet->heading.unused = 0;
for (i = 0; i < 25; i++) {
if (!(NODE c->sendptr)->next)
break;
DBG( "." );
packet->block[i].family = htons( 2 ); /* AF_INET */
packet->block[i].tag = htons( 0 ); /* FIXME: What should I set it to? */
packet->block[i].network = c->sendptr->network;
packet->block[i].netmask = ipa_mkmask( c->sendptr->pxlen );
packet->block[i].nexthop = IPA_NONE; /* FIXME: How should I set it? */
packet->block[i].metric = htonl( 1+ (c->sendptr->metric?:1) );
if (ipa_equal(c->sendptr->whotoldme, s->daddr)) {
DBG( "(split horizont)" );
/* FIXME: should we do it in all cases? */
packet->block[i].metric = P->infinity;
} }
ipa_hton( packet->block[i].network );
ipa_hton( packet->block[i].netmask );
ipa_hton( packet->block[i].nexthop );
c->sendptr = (void *) (NODE c->sendptr)->next; if (c->done) {
} DBG( "looks like I'm done!\n" );
return;
}
DBG( ", sending %d blocks, ", i ); DBG( "Preparing packet to send: " );
packet->heading.command = RIPCMD_RESPONSE;
packet->heading.version = RIP_V2;
packet->heading.unused = 0;
i = 0;
FIB_ITERATE_START(&P->rtable, &c->iter, z) {
struct rip_entry *e = (struct rip_entry *) z;
DBG( "." );
packet->block[i].family = htons( 2 ); /* AF_INET */
packet->block[i].tag = htons( 0 ); /* FIXME: What should I set it to? */
packet->block[i].network = e->n.prefix;
packet->block[i].netmask = ipa_mkmask( e->n.pxlen );
packet->block[i].nexthop = IPA_NONE; /* FIXME: How should I set it? */
packet->block[i].metric = htonl( 1+ (e->metric?:1) );
if (ipa_equal(e->whotoldme, s->daddr)) {
DBG( "(split horizont)" );
/* FIXME: should we do it in all cases? */
packet->block[i].metric = P->infinity;
}
ipa_hton( packet->block[i].network );
ipa_hton( packet->block[i].netmask );
ipa_hton( packet->block[i].nexthop );
if (i++ == 25) {
FIB_ITERATE_PUT(&c->iter, z);
goto break_loop;
}
} FIB_ITERATE_END;
c->done = 1;
break_loop:
DBG( ", sending %d blocks, ", i );
if (ipa_nonzero(c->daddr))
i = sk_send_to( s, sizeof( struct rip_packet_heading ) + i*sizeof( struct rip_block ), c->daddr, c->dport );
else
i = sk_send( s, sizeof( struct rip_packet_heading ) + i*sizeof( struct rip_block ) );
if (ipa_nonzero(c->daddr))
i = sk_send_to( s, sizeof( struct rip_packet_heading ) + i*sizeof( struct rip_block ), c->daddr, c->dport );
else
i = sk_send( s, sizeof( struct rip_packet_heading ) + i*sizeof( struct rip_block ) );
if (i<0) rip_tx_err( s, i );
if (i>0) {
DBG( "it wants more\n" ); DBG( "it wants more\n" );
goto givemore;
}
} while (i>0);
if (i<0) rip_tx_err( s, i );
DBG( "blocked\n" ); DBG( "blocked\n" );
} }
@ -202,7 +146,8 @@ rip_sendto( struct proto *p, ip_addr daddr, int dport, struct rip_interface *rif
} }
#endif #endif
c->sendptr = HEAD( P->rtable ); c->done = 0;
fit_init( &c->iter, &P->rtable );
add_head( &P->connections, NODE c ); add_head( &P->connections, NODE c );
debug( "Sending my routing table to %I:%d on %s\n", daddr, dport, rif->iface->name ); debug( "Sending my routing table to %I:%d on %s\n", daddr, dport, rif->iface->name );
@ -385,7 +330,7 @@ static void
rip_dump_entry( struct rip_entry *e ) rip_dump_entry( struct rip_entry *e )
{ {
debug( "%I told me %d/%d ago: to %I/%d go via %I, metric %d ", debug( "%I told me %d/%d ago: to %I/%d go via %I, metric %d ",
e->whotoldme, e->updated-now, e->changed-now, e->network, e->pxlen, e->nexthop, e->metric ); e->whotoldme, e->updated-now, e->changed-now, e->n.prefix, e->n.pxlen, e->nexthop, e->metric );
if (e->flags & RIP_F_EXTERNAL) debug( "[external]" ); if (e->flags & RIP_F_EXTERNAL) debug( "[external]" );
debug( "\n" ); debug( "\n" );
} }
@ -412,15 +357,16 @@ rip_timer(timer *t)
DBG( "RIP: Broadcasting routing tables\n" ); DBG( "RIP: Broadcasting routing tables\n" );
{ {
struct rip_interface *i; struct rip_interface *rif;
WALK_LIST( i, P->interfaces ) { WALK_LIST( rif, P->interfaces ) {
struct iface *iface = i->iface; struct iface *iface = rif->iface;
if (!iface) continue;
if (!(iface->flags & IF_UP)) continue; if (!(iface->flags & IF_UP)) continue;
if (iface->flags & (IF_IGNORE | IF_LOOPBACK)) continue; if (iface->flags & (IF_IGNORE | IF_LOOPBACK)) continue;
rip_sendto( p, IPA_NONE, 0, i ); rip_sendto( p, IPA_NONE, 0, rif );
} }
} }
@ -430,10 +376,11 @@ rip_timer(timer *t)
static void static void
rip_start(struct proto *p) rip_start(struct proto *p)
{ {
struct rip_interface *rif;
DBG( "RIP: starting instance...\n" ); DBG( "RIP: starting instance...\n" );
P->magic = RIP_MAGIC; P->magic = RIP_MAGIC;
init_list( &P->rtable ); fib_init( &P->rtable, p->pool, sizeof( struct rip_entry ), 0, NULL );
init_list( &P->connections ); init_list( &P->connections );
init_list( &P->garbage ); init_list( &P->garbage );
init_list( &P->interfaces ); init_list( &P->interfaces );
@ -443,6 +390,8 @@ rip_start(struct proto *p)
P->timer->recurrent = P->period; P->timer->recurrent = P->period;
P->timer->hook = rip_timer; P->timer->hook = rip_timer;
tm_start( P->timer, 5 ); tm_start( P->timer, 5 );
rif = new_iface(p, NULL, 0); /* Initialize dummy interface */
add_head( &P->interfaces, NODE rif );
CHK_MAGIC; CHK_MAGIC;
DBG( "RIP: ...done\n"); DBG( "RIP: ...done\n");
@ -466,10 +415,10 @@ rip_dump(struct proto *p)
debug( "RIP: connection #%d: %I\n", n->num, n->addr ); debug( "RIP: connection #%d: %I\n", n->num, n->addr );
} }
i = 0; i = 0;
WALK_LIST( e, P->rtable ) { FIB_WALK( &P->rtable, e ) {
debug( "RIP: entry #%d: ", i++ ); debug( "RIP: entry #%d: ", i++ );
rip_dump_entry( E ); rip_dump_entry( E );
} } FIB_WALK_END;
i = 0; i = 0;
WALK_LIST( rif, P->interfaces ) { WALK_LIST( rif, P->interfaces ) {
debug( "RIP: interface #%d: %s, %I, busy = %x\n", i++, rif->iface?rif->iface->name:"(dummy)", rif->sock->daddr, rif->busy ); debug( "RIP: interface #%d: %s, %I, busy = %x\n", i++, rif->iface?rif->iface->name:"(dummy)", rif->sock->daddr, rif->busy );
@ -502,6 +451,7 @@ new_iface(struct proto *p, struct iface *new, unsigned long flags)
rif = mb_alloc(p->pool, sizeof( struct rip_interface )); rif = mb_alloc(p->pool, sizeof( struct rip_interface ));
rif->iface = new; rif->iface = new;
rif->proto = p; rif->proto = p;
rif->busy = NULL;
want_multicast = 0 && (flags & IF_MULTICAST); want_multicast = 0 && (flags & IF_MULTICAST);
/* FIXME: should have config option to disable this one */ /* FIXME: should have config option to disable this one */
@ -512,7 +462,7 @@ new_iface(struct proto *p, struct iface *new, unsigned long flags)
rif->sock->rx_hook = rip_rx; rif->sock->rx_hook = rip_rx;
rif->sock->data = rif; rif->sock->data = rif;
rif->sock->rbsize = 10240; rif->sock->rbsize = 10240;
rif->sock->iface = new; rif->sock->iface = new; /* Automagically works for dummy interface */
rif->sock->tbuf = mb_alloc( p->pool, sizeof( struct rip_packet )); rif->sock->tbuf = mb_alloc( p->pool, sizeof( struct rip_packet ));
rif->sock->tx_hook = rip_tx; rif->sock->tx_hook = rip_tx;
rif->sock->err_hook = rip_tx_err; rif->sock->err_hook = rip_tx_err;
@ -528,10 +478,10 @@ new_iface(struct proto *p, struct iface *new, unsigned long flags)
rif->sock->daddr = new->opposite; rif->sock->daddr = new->opposite;
if (!ipa_nonzero(rif->sock->daddr)) if (!ipa_nonzero(rif->sock->daddr))
log( L_WARN "RIP: interface %s is too strange for me", rif->iface->name ); log( L_WARN "RIP: interface %s is too strange for me", rif->iface ? rif->iface->name : "(dummy)" );
if (sk_open(rif->sock)<0) if (sk_open(rif->sock)<0)
die( "RIP/%s: could not listen on %s", p->name, rif->iface->name ); die( "RIP/%s: could not listen on %s", p->name, rif->iface ? rif->iface->name : "(dummy)" );
/* FIXME: Should not be fatal, since the interface might have gone */ /* FIXME: Should not be fatal, since the interface might have gone */
return rif; return rif;
@ -567,27 +517,24 @@ rip_rt_notify(struct proto *p, struct network *net, struct rte *new, struct rte
CHK_MAGIC; CHK_MAGIC;
if (old) { if (old) {
struct rip_entry *e = find_entry( p, net->n.prefix, net->n.pxlen ); struct rip_entry *e = fib_find( &P->rtable, &net->n.prefix, net->n.pxlen );
if (!e) if (!e)
log( L_ERR "Deleting nonexistent entry?!" ); log( L_BUG "Deleting nonexistent entry?!" );
fib_delete( &P->rtable, e );
kill_entry_ourrt( p, e );
} }
if (new) { if (new) {
struct rip_entry *e = new_entry( p ); struct rip_entry *e;
if (fib_find( &P->rtable, &net->n.prefix, net->n.pxlen ))
log( L_BUG "Inserting entry which is already there?" );
e = fib_get( &P->rtable, &net->n.prefix, net->n.pxlen );
e->network = net->n.prefix;
e->pxlen = net->n.pxlen;
e->nexthop = new->attrs->gw; e->nexthop = new->attrs->gw;
e->tag = new->u.rip.tag; e->tag = new->u.rip.tag;
e->metric = new->u.rip.metric; e->metric = new->u.rip.metric;
e->whotoldme = new->attrs->from; e->whotoldme = new->attrs->from;
e->updated = e->changed = now; e->updated = e->changed = now;
e->flags = 0; e->flags = 0;
add_head( &P->rtable, NODE e );
} }
} }
@ -658,9 +605,6 @@ rip_preconfig(struct protocol *x)
static void static void
rip_postconfig(struct protocol *p) rip_postconfig(struct protocol *p)
{ {
#if 0 /* Cannot do this since it crashes when RIP is unconfigured */
new_iface(p, NULL, 0);
#endif
} }
struct protocol proto_rip = { struct protocol proto_rip = {

12
proto/rip/rip.h
View file

@ -2,18 +2,21 @@
* Structures for RIP protocol * Structures for RIP protocol
*/ */
#include "nest/route.h"
struct rip_connection { struct rip_connection {
node n; node n;
int num; int num;
struct proto *proto; struct proto *proto;
ip_addr addr; ip_addr addr;
struct rip_entry *sendptr;
sock *send; sock *send;
struct rip_interface *rif; struct rip_interface *rif;
struct fib_iterator iter;
ip_addr daddr; ip_addr daddr;
int dport; int dport;
int done;
}; };
struct rip_packet_heading { struct rip_packet_heading {
@ -39,11 +42,9 @@ struct rip_block {
}; };
struct rip_entry { struct rip_entry {
node n; struct fib_node n;
ip_addr whotoldme; ip_addr whotoldme;
ip_addr network;
int pxlen;
ip_addr nexthop; ip_addr nexthop;
int metric; int metric;
u16 tag; u16 tag;
@ -72,7 +73,7 @@ struct rip_proto {
struct proto inherited; struct proto inherited;
timer *timer; timer *timer;
list connections; list connections;
list rtable; struct fib rtable;
list garbage; list garbage;
list interfaces; /* Interfaces we really know about */ list interfaces; /* Interfaces we really know about */
list iface_list; /* Patterns configured */ list iface_list; /* Patterns configured */
@ -91,3 +92,4 @@ struct rip_proto {
#define CHK_MAGIC do { if (P->magic != RIP_MAGIC) bug( "Not enough magic\n" ); } while (0) #define CHK_MAGIC do { if (P->magic != RIP_MAGIC) bug( "Not enough magic\n" ); } while (0)
void rip_init_instance(struct proto *p); void rip_init_instance(struct proto *p);
struct rip_interface *new_iface(struct proto *p, struct iface *new, unsigned long flags);