mirror of
https://gitlab.nic.cz/labs/bird.git
synced 2024-12-22 09:41:54 +00:00
Rip now includes code to reply, but it is currently broken.
This commit is contained in:
Pavel Machek
parent
48b41d5811
commit
279f4c7b7b
224
proto/rip/rip.c
224
proto/rip/rip.c
@ -27,10 +27,8 @@ int infinity = 16;
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/* XXX should be 520 */
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#define RIP_PORT 1520
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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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}
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/* XXX should be 30 */
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#define RIP_TIME 5
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static void
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rip_reply(struct proto *p)
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@ -39,13 +37,9 @@ rip_reply(struct proto *p)
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sk_send_to( P->listen, 5, P->listen->faddr, P->listen->fport );
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}
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#define BAD( x ) { log( L_WARN "RIP/%s: " x "\n", p->name ); return; }
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static int
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process_authentication( struct proto *p, struct rip_block *block )
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{
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return 0;
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}
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/*
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* Entries
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*/
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static struct rip_entry *
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find_entry( struct proto *p, ip_addr network, ip_addr netmask )
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@ -55,15 +49,13 @@ find_entry( struct proto *p, ip_addr network, ip_addr netmask )
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CHK_MAGIC;
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WALK_LIST( e, P->rtable ) {
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if (ipa_equal( network, E->network ) &&
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ipa_equal( netmask, E->netmask )) {
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(ipa_mklen( netmask ) == E->pxlen)) {
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return E;
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}
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}
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return NULL;
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}
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#define ipa_from_u32(a) (*(ip_addr *) &a)
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static struct rip_entry *
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new_entry( struct proto *p, struct rip_block *b, ip_addr whotoldme )
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{
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@ -71,17 +63,41 @@ new_entry( struct proto *p, struct rip_block *b, ip_addr whotoldme )
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e = mb_alloc(p->pool, sizeof( struct rip_entry ));
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e->whotoldme = whotoldme;
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e->network = ipa_from_u32( b->network );
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e->netmask = ipa_from_u32( b->netmask );
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e->network = b->network;
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e->pxlen = ipa_mklen( b->netmask );
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/* FIXME: verify that it is really netmask */
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if (b->nexthop)
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e->nexthop = ipa_from_u32( b->nexthop );
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if (ipa_nonzero(b->nexthop))
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e->nexthop = b->nexthop;
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else
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e->nexthop = whotoldme;
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e->tag = ntohs( b->tag );
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e->metric = ntohl( b->metric );
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e->updated = e->changed = now;
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{
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rta *a, A;
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rte *r;
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net *n;
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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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A.scope = SCOPE_UNIVERSE;
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A.cast = RTC_UNICAST;
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A.dest = RTD_ROUTER;
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A.tos = 0;
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A.flags = 0;
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A.gw = e->nexthop;
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A.from = e->whotoldme;
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A.iface = /* fixme: need to set somehow */ NULL;
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/* set to: interface of nexthop */
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a = rta_lookup(&A);
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n = net_get( &master_table, 0, e->network, e->pxlen );
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r = rte_get_temp(a);
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r->pflags = 0; /* Here go my flags */
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rte_update( n, p, r );
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}
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return e;
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}
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@ -89,6 +105,11 @@ static void
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kill_entry( struct proto *p, struct rip_entry *e )
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{
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struct rip_connection *c;
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net *n;
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n = net_find(&master_table, 0, e->network, e->pxlen );
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if (!n) debug( "Could not find entry to delete in main routing table.\n" );
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else rte_update( n, p, NULL );
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rem_node( NODE e );
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WALK_LIST( c, P->connections ) {
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@ -98,6 +119,111 @@ kill_entry( struct proto *p, struct rip_entry *e )
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mb_free( e );
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}
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/*
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* Output processing
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*/
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static void
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rip_tx_err( sock *s, int err )
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{
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struct rip_connection *c = s->data;
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struct proto *p = c->proto;
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log( L_ERR "Unexpected error at rip transmit\n" );
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}
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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 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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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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return;
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}
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packet->heading.command = 99; /* FIXME */
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packet->heading.version = RIP_V2;
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packet->heading.unused = 0;
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for (i = 0; i < 25; i++) {
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if (!(NODE c->sendptr)->next)
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break;
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debug( "." );
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packet->block[i].family = htons( 0 ); /* Is it right? */
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packet->block[i].tag = htons( 0 ); /* What should I set it to? */
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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 );
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ipa_hton( packet->block[i].network );
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ipa_hton( packet->block[i].netmask );
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ipa_hton( packet->block[i].nexthop );
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c->sendptr = (void *) (NODE c->sendptr)->next;
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}
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debug( ", sending %d blocks, ", i+1 );
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i = sk_send( s, sizeof( struct rip_packet_heading ) + (i+1)*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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debug( "it wants more\n" );
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goto givemore;
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}
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debug( "blocked\n" );
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}
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static void
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rip_sendto( struct proto *p, ip_addr daddr, int dport )
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{
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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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c->addr = daddr;
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c->proto = p;
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c->num = num++;
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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;
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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->tbuf = mb_alloc( p->pool, sizeof( struct rip_packet ));
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if (sk_open(c->send)<0) {
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log( L_ERR "Could not send data to %I:%d\n", daddr, dport );
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return;
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}
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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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rip_tx( c->send );
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}
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/*
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* Input processing
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*/
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static int
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process_authentication( struct proto *p, struct rip_block *block )
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{
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return 0;
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}
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#define DELETE( msg ) { debug( msg ); kill_entry( p, e ); e = NULL; }
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static void
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@ -105,7 +231,7 @@ process_block( struct proto *p, struct rip_block *block, ip_addr whotoldme )
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{
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struct rip_entry *e;
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int metric = ntohl( block->metric );
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ip_addr network = ipa_from_u32( block->network );
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ip_addr network = block->network;
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CHK_MAGIC;
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if ((!metric) || (metric > infinity)) {
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@ -119,9 +245,9 @@ process_block( struct proto *p, struct rip_block *block, ip_addr whotoldme )
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if (metric < infinity)
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metric++;
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debug( "block: %I tells me: %I available, metric %d... ", whotoldme, network, metric );
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debug( "block: %I tells me: %I/%I available, metric %d... ", whotoldme, network, block->netmask, metric );
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e = find_entry( p, network, ipa_from_u32( block->netmask ) );
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e = find_entry( p, network, block->netmask );
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if (e && (e->metric > metric)) /* || if same metrics and this is much newer */
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DELETE( "better metrics... " );
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@ -144,29 +270,33 @@ process_block( struct proto *p, struct rip_block *block, ip_addr whotoldme )
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}
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#undef DELETE
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static void
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#define BAD( x ) { log( L_WARN "RIP/%s: " x "\n", p->name ); return 1; }
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static int
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rip_process_packet( struct proto *p, struct rip_packet *packet, int num, ip_addr whotoldme, int port )
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{
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int i;
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int native_class = 0;
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switch( packet->heading.version ) {
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case RIP_V1: debug( "Warning: I do not talk ripv1\n" ); break;
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case RIP_V2: break;
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case '!': debug( "OOk, sir!\n" ); break;
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case RIP_V1: debug( "Rip1: " ); break;
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case RIP_V2: debug( "Rip2: " ); break;
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default: BAD( "Unknown version" );
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}
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switch( packet->heading.command ) {
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case 1: debug( "Asked to send my routing table\n" ); break;
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case 1: debug( "Asked to send my routing table\n" );
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rip_sendto( p, whotoldme, port );
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break;
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case 2: debug( "Part of routing table came\n" );
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if (port != RIP_PORT) {
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log( L_AUTH "%I send me routing info from port %d\n", whotoldme, port );
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return;
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return 0;
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}
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if (!neigh_find( p, &whotoldme, 0 )) {
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log( L_AUTH "%I send me routing info but he is not my neighbour\n", whotoldme );
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return;
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return 0;
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}
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/* Should check if it is not my own packet */
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@ -178,20 +308,27 @@ rip_process_packet( struct proto *p, struct rip_packet *packet, int num, ip_addr
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if (process_authentication(p, block))
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BAD( "Authentication failed\n" );
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} else BAD( "Authentication is not the first!" );
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ipa_ntoh( block->network );
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ipa_ntoh( block->netmask );
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ipa_ntoh( block->nexthop );
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if (packet->heading.version == RIP_V1) {
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block->netmask = block->network; /* MJ: why are macros like this?! */
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ipa_class_mask( block->netmask );
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}
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process_block( p, block, whotoldme );
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}
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break;
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case 3:
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case 4: BAD( "I was asked for traceon/traceoff\n" );
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case 5: BAD( "Some Sun extension around here\n" );
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case '!': debug( "He gave me!\n" ); break;
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default: BAD( "Unknown command" );
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}
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rip_reply(p);
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return 0;
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}
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static void
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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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@ -207,13 +344,18 @@ rip_rx(sock *s, int size)
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if (num>25) BAD( "Too many blocks" );
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rip_process_packet( p, (struct rip_packet *) s->rbuf, num, s->faddr, s->fport );
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return 1;
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}
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/*
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* Interface to rest of bird
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*/
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static void
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rip_dump_entry( struct rip_entry *e )
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{
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debug( "%I told me %d/%d ago: to %I/%I go via %I, metric %d\n",
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e->whotoldme, e->updated-now, e->changed-now, e->network, e->netmask, e->nexthop, e->metric );
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debug( "%I told me %d/%d ago: to %I/%d go via %I, metric %d\n",
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e->whotoldme, e->updated-now, e->changed-now, e->network, e->pxlen, e->nexthop, e->metric );
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}
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static void
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@ -232,6 +374,11 @@ rip_timer(timer *t)
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kill_entry( p, E );
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}
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}
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debug( "RIP: Broadcasting routing tables\n" );
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rip_sendto( p, _MI( 0x0a000001 ), RIP_PORT );
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debug( "RIP: tick tock done\n" );
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}
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static void
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@ -253,9 +400,9 @@ rip_start(struct proto *p)
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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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P->timer->recurrent = 30;
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P->timer->recurrent = RIP_TIME;
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P->timer->hook = rip_timer;
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tm_start( P->timer, 30 );
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tm_start( P->timer, 5 );
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debug( "RIP: ...done\n");
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}
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@ -273,8 +420,8 @@ rip_dump(struct proto *p)
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node *w, *e;
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i = 0;
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WALK_LIST( w, P->connections ) {
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struct rip_connection *n = w;
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debug( "RIP: connection #%d: %I\n", i, n->addr );
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struct rip_connection *n = (void *) w;
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debug( "RIP: connection #%d: %I\n", n->num, n->addr );
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}
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i = 0;
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WALK_LIST( e, P->rtable ) {
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@ -283,6 +430,11 @@ rip_dump(struct proto *p)
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}
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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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}
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static void
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rip_preconfig(struct protocol *x)
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{
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@ -3,6 +3,10 @@
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*/
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struct rip_connection {
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node n;
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int num;
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struct proto *proto;
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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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@ -10,6 +14,11 @@ struct rip_connection {
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struct rip_packet_heading {
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u8 command;
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#define RIPCMD_REQUEST 1 /* want info */
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#define RIPCMD_RESPONSE 2 /* responding to request */
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#define RIPCMD_TRACEON 3 /* turn tracing on */
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#define RIPCMD_TRACEOFF 4 /* turn it off */
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#define RIPCMD_MAX 5
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u8 version;
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#define RIP_V1 1
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#define RIP_V2 2
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@ -19,9 +28,9 @@ struct rip_packet_heading {
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struct rip_block {
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u16 family; /* 0xffff on first message means this is authentication */
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u16 tag;
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u32 network;
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u32 netmask;
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u32 nexthop;
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ip_addr network;
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ip_addr netmask;
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ip_addr nexthop;
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u32 metric;
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};
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@ -30,7 +39,7 @@ struct rip_entry {
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ip_addr whotoldme;
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ip_addr network;
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ip_addr netmask;
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int pxlen;
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ip_addr nexthop;
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int metric;
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