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https://gitlab.nic.cz/labs/bird.git
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RIP now includes notion of interface, and is correctly talking to
itself on second host. Split horizont is broken.
This commit is contained in:
Pavel Machek
parent
dafd580ed9
commit
c3e9b2ab24
153
proto/rip/rip.c
153
proto/rip/rip.c
@ -124,7 +124,8 @@ rip_tx_err( sock *s, int err )
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static void
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rip_tx( sock *s )
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{
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struct rip_connection *c = s->data;
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struct rip_interface *rif = s->data;
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struct rip_connection *c = rif->busy;
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struct proto *p = c->proto;
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struct rip_packet *packet = (void *) s->tbuf;
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int i, done = 0;
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@ -134,8 +135,11 @@ givemore:
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debug( "Preparing packet to send: " );
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if (!(NODE c->sendptr)->next) {
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debug( "Looks like I'm done\n" );
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/* FIXME: we have to kill that socket & connection NOW! */
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debug( "Looks like I'm" );
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c->rif->busy = NULL;
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rem_node(NODE c);
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mb_free(c);
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debug( "done\n" );
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return;
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}
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@ -152,7 +156,7 @@ givemore:
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packet->block[i].network = c->sendptr->network;
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packet->block[i].netmask = ipa_mkmask( c->sendptr->pxlen );
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packet->block[i].nexthop = IPA_NONE; /* FIXME: How should I set it? */
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packet->block[i].metric = htonl( c->sendptr->metric?:1 );
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packet->block[i].metric = htonl( 1+ (c->sendptr->metric?:1) );
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if (ipa_equal(c->sendptr->whotoldme, s->daddr)) {
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debug( "(split horizont)" );
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/* FIXME: should we do it in all cases? */
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@ -167,6 +171,9 @@ givemore:
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debug( ", sending %d blocks, ", i );
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if (ipa_nonzero(c->daddr))
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i = sk_send_to( s, sizeof( struct rip_packet_heading ) + i*sizeof( struct rip_block ), c->daddr, c->dport );
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else
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i = sk_send( s, sizeof( struct rip_packet_heading ) + i*sizeof( struct rip_block ) );
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if (i<0) rip_tx_err( s, i );
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if (i>0) {
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@ -178,38 +185,39 @@ givemore:
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}
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static void
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rip_sendto( struct proto *p, ip_addr daddr, int dport, struct iface *iface )
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rip_sendto( struct proto *p, ip_addr daddr, int dport, struct rip_interface *rif )
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{
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struct iface *iface = rif->iface;
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struct rip_connection *c = mb_alloc( p->pool, sizeof( struct rip_connection ));
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static int num = 0;
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/* FIXME: maybe we should not send when we are already sending? */
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if (rif->busy) {
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log (L_WARN "Interface %s is much too slow, dropping request\n", iface->name);
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return;
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}
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rif->busy = c;
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c->addr = daddr;
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c->proto = p;
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c->num = num++;
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c->rif = rif;
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c->send = sk_new( p->pool );
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c->send->type = SK_UDP;
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c->send->sport = RIP_PORT+1; /* BIG FIXME: have to talk from RIP_PORT */
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c->send->dport = dport;
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c->send->daddr = daddr;
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c->send->rx_hook = NULL;
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c->send->tx_hook = rip_tx;
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c->send->err_hook = rip_tx_err;
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c->send->data = c;
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c->send->iface = iface;
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c->send->tbuf = mb_alloc( p->pool, sizeof( struct rip_packet ));
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c->dport = dport;
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c->daddr = daddr;
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if (c->rif->sock->data != rif)
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die("not enough send magic\n");
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#if 0
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if (sk_open(c->send)<0) {
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log( L_ERR "Could not open socket for data send to %I:%d\n", daddr, dport );
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log( L_ERR "Could not open socket for data send to %I:%d on %s\n", daddr, dport, rif->iface->name );
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return;
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}
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#endif
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c->sendptr = HEAD( P->rtable );
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add_head( &P->connections, NODE c );
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debug( "Sending my routing table to %I:%d\n", daddr, dport );
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debug( "Sending my routing table to %I:%d on %s\n", daddr, dport, rif->iface->name );
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rip_tx( c->send );
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rip_tx(c->rif->sock);
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}
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/*
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@ -232,7 +240,6 @@ advertise_entry( struct proto *p, struct rip_block *b, ip_addr whotoldme )
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net *n;
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neighbor *neighbor;
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debug( "rip: Advertising entry..." );
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bzero(&A, sizeof(A));
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A.proto = p;
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A.source = RTS_RIP;
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@ -305,7 +312,7 @@ rip_process_packet( struct proto *p, struct rip_packet *packet, int num, ip_addr
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case RIPCMD_REQUEST: debug( "Asked to send my routing table\n" );
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rip_sendto( p, whotoldme, port, NULL ); /* no broadcast */
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break;
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case RIPCMD_RESPONSE: debug( "*** Part of routing table came from %I\n", whotoldme );
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case RIPCMD_RESPONSE: debug( "*** Rtable from %I\n", whotoldme );
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if (port != RIP_PORT) {
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log( L_ERR "%I send me routing info from port %d\n", whotoldme, port );
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#if 0
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@ -352,7 +359,8 @@ rip_process_packet( struct proto *p, struct rip_packet *packet, int num, ip_addr
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static int
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rip_rx(sock *s, int size)
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{
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struct proto *p = s->data;
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struct rip_interface *i = s->data;
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struct proto *p = i->proto;
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int num;
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CHK_MAGIC;
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@ -402,22 +410,15 @@ rip_timer(timer *t)
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debug( "RIP: Broadcasting routing tables\n" );
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{
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struct iface *iface;
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struct rip_interface *i;
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WALK_LIST( i, P->interfaces ) {
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struct iface *iface = i->iface;
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/* FIXME: needs to be configured */
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WALK_LIST( iface, iface_list ) {
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if (!(iface->flags & IF_UP)) continue;
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if (iface->flags & (IF_IGNORE | IF_LOOPBACK)) continue;
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if (iface->flags & IF_BROADCAST) {
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rip_sendto( p, iface->brd, RIP_PORT, iface );
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continue;
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}
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if (iface->flags & IF_UNNUMBERED) {
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rip_sendto( p, iface->opposite, RIP_PORT, NULL );
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continue;
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}
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debug( "RIP/send: can not happen\n" );
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rip_sendto( p, IPA_NONE, 0, i );
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}
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}
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@ -429,18 +430,11 @@ rip_start(struct proto *p)
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{
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debug( "RIP: initializing instance...\n" );
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P->listen = sk_new( p->pool );
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P->listen->type = SK_UDP;
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P->listen->sport = RIP_PORT;
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P->listen->rx_hook = rip_rx;
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P->listen->data = p;
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P->listen->rbsize = 10240;
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P->magic = RIP_MAGIC;
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if (sk_open(P->listen)<0)
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die( "RIP/%s: could not listen\n", p->name );
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init_list( &P->rtable );
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init_list( &P->connections );
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init_list( &P->garbage );
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init_list( &P->interfaces );
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P->timer = tm_new( p->pool );
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P->timer->data = p;
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P->timer->randomize = 5;
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@ -463,6 +457,7 @@ rip_dump(struct proto *p)
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{
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int i;
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node *w, *e;
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struct rip_interface *rif;
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i = 0;
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WALK_LIST( w, P->connections ) {
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struct rip_connection *n = (void *) w;
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@ -473,23 +468,89 @@ rip_dump(struct proto *p)
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debug( "RIP: entry #%d: ", i++ );
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rip_dump_entry( E );
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}
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i = 0;
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WALK_LIST( rif, P->interfaces ) {
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debug( "RIP: interface #%d: %s, %I, busy = %x\n", i++, rif->iface->name, rif->sock->daddr, rif->busy );
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}
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}
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static int
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rip_want_this_if(struct rip_interface *iface)
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{
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return 1;
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}
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static void
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kill_iface(struct proto *p, struct rip_interface *i)
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{
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debug( "RIP: Interface %s disappeared\n", i->iface->name);
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rfree(i->sock);
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mb_free(i);
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}
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struct rip_interface *
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new_iface(struct proto *p, struct iface *new)
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{
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struct rip_interface *i;
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debug( "RIP: New interface %s here\n", new->name);
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i = mb_alloc(p->pool, sizeof( struct rip_interface ));
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i->iface = new;
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i->proto = p;
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i->sock = sk_new( p->pool );
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i->sock->type = SK_UDP;
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i->sock->sport = RIP_PORT;
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i->sock->rx_hook = rip_rx;
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i->sock->data = i;
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i->sock->rbsize = 10240;
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i->sock->iface = new;
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i->sock->tbuf = mb_alloc( p->pool, sizeof( struct rip_packet ));
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i->sock->tx_hook = rip_tx;
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i->sock->err_hook = rip_tx_err;
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i->sock->daddr = IPA_NONE;
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i->sock->dport = RIP_PORT;
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if (new->flags & IF_BROADCAST)
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i->sock->daddr = new->brd;
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if (new->flags & IF_UNNUMBERED)
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i->sock->daddr = new->opposite;
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if (!ipa_nonzero(i->sock->daddr))
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log( L_WARN "RIP: interface %s is too strange for me\n", i->iface->name );
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if (sk_open(i->sock)<0)
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die( "RIP/%s: could not listen on %s\n", p->name, i->iface->name );
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return i;
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}
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static void
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rip_if_notify(struct proto *p, unsigned c, struct iface *old, struct iface *new)
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{
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debug( "RIP: if notify\n" );
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if (old) {
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struct rip_interface *i;
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WALK_LIST (i, P->interfaces)
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if (i->iface == old) {
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rem_node(NODE i);
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kill_iface(p, i);
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}
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}
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if (new) {
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struct rip_interface *i;
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i = new_iface(p, new);
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add_head( &P->interfaces, NODE i );
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}
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}
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static void
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rip_rt_notify(struct proto *p, struct network *net, struct rte *new, struct rte *old)
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{
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debug( "rip: new entry came: " );
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CHK_MAGIC;
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if (old) {
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struct rip_entry *e = find_entry( p, net->n.prefix, net->n.pxlen );
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debug( "deleting old\n" );
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if (!e)
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log( L_ERR "Deleting nonexistent entry?!\n" );
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@ -499,7 +560,6 @@ rip_rt_notify(struct proto *p, struct network *net, struct rte *new, struct rte
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if (new) {
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struct rip_entry *e = new_entry( p );
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debug( "inserting new\n" );
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e->network = net->n.prefix;
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e->pxlen = net->n.pxlen;
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e->nexthop = new->attrs->gw;
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@ -532,7 +592,6 @@ rip_rte_better(struct rte *new, struct rte *old)
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static int
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rip_rta_same(rta *a, rta *b)
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{
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debug( "RIP: they ask me if rta_same\n" );
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/* As we have no specific data in rta, they are always the same */
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return 1;
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}
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@ -10,6 +10,10 @@ struct rip_connection {
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ip_addr addr;
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struct rip_entry *sendptr;
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sock *send;
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struct rip_interface *rif;
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ip_addr daddr;
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int dport;
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};
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struct rip_packet_heading {
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@ -54,13 +58,21 @@ struct rip_packet {
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struct rip_block block[25];
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};
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struct rip_interface {
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node n;
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struct proto *proto;
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struct iface *iface;
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sock *sock;
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struct rip_connection *busy;
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};
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struct rip_data {
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struct proto inherited;
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sock *listen;
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timer *timer;
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list connections;
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list rtable;
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list garbage;
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list interfaces;
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int magic;
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};
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