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;
|
||||
/* XXX should be 520 */
|
||||
#define RIP_PORT 1520
|
||||
|
||||
static void
|
||||
rip_if_notify(struct proto *p, unsigned c, struct iface *old, struct iface *new)
|
||||
{
|
||||
}
|
||||
/* XXX should be 30 */
|
||||
#define RIP_TIME 5
|
||||
|
||||
static void
|
||||
rip_reply(struct proto *p)
|
||||
@ -39,13 +37,9 @@ rip_reply(struct proto *p)
|
||||
sk_send_to( P->listen, 5, P->listen->faddr, P->listen->fport );
|
||||
}
|
||||
|
||||
#define BAD( x ) { log( L_WARN "RIP/%s: " x "\n", p->name ); return; }
|
||||
|
||||
static int
|
||||
process_authentication( struct proto *p, struct rip_block *block )
|
||||
{
|
||||
return 0;
|
||||
}
|
||||
/*
|
||||
* Entries
|
||||
*/
|
||||
|
||||
static struct rip_entry *
|
||||
find_entry( struct proto *p, ip_addr network, ip_addr netmask )
|
||||
@ -55,15 +49,13 @@ find_entry( struct proto *p, ip_addr network, ip_addr netmask )
|
||||
CHK_MAGIC;
|
||||
WALK_LIST( e, P->rtable ) {
|
||||
if (ipa_equal( network, E->network ) &&
|
||||
ipa_equal( netmask, E->netmask )) {
|
||||
(ipa_mklen( netmask ) == E->pxlen)) {
|
||||
return E;
|
||||
}
|
||||
}
|
||||
return NULL;
|
||||
}
|
||||
|
||||
#define ipa_from_u32(a) (*(ip_addr *) &a)
|
||||
|
||||
static struct rip_entry *
|
||||
new_entry( struct proto *p, struct rip_block *b, ip_addr whotoldme )
|
||||
{
|
||||
@ -71,16 +63,40 @@ new_entry( struct proto *p, struct rip_block *b, ip_addr whotoldme )
|
||||
|
||||
e = mb_alloc(p->pool, sizeof( struct rip_entry ));
|
||||
e->whotoldme = whotoldme;
|
||||
e->network = ipa_from_u32( b->network );
|
||||
e->netmask = ipa_from_u32( b->netmask );
|
||||
e->network = b->network;
|
||||
e->pxlen = ipa_mklen( b->netmask );
|
||||
/* FIXME: verify that it is really netmask */
|
||||
if (b->nexthop)
|
||||
e->nexthop = ipa_from_u32( b->nexthop );
|
||||
if (ipa_nonzero(b->nexthop))
|
||||
e->nexthop = b->nexthop;
|
||||
else
|
||||
e->nexthop = whotoldme;
|
||||
e->tag = ntohs( b->tag );
|
||||
e->metric = ntohl( b->metric );
|
||||
e->updated = e->changed = now;
|
||||
|
||||
{
|
||||
rta *a, A;
|
||||
rte *r;
|
||||
net *n;
|
||||
|
||||
bzero(&A, sizeof(A));
|
||||
A.proto = p;
|
||||
A.source = RTS_RIP;
|
||||
A.scope = SCOPE_UNIVERSE;
|
||||
A.cast = RTC_UNICAST;
|
||||
A.dest = RTD_ROUTER;
|
||||
A.tos = 0;
|
||||
A.flags = 0;
|
||||
A.gw = e->nexthop;
|
||||
A.from = e->whotoldme;
|
||||
A.iface = /* fixme: need to set somehow */ NULL;
|
||||
/* set to: interface of nexthop */
|
||||
a = rta_lookup(&A);
|
||||
n = net_get( &master_table, 0, e->network, e->pxlen );
|
||||
r = rte_get_temp(a);
|
||||
r->pflags = 0; /* Here go my flags */
|
||||
rte_update( n, p, r );
|
||||
}
|
||||
|
||||
return e;
|
||||
}
|
||||
@ -89,6 +105,11 @@ static void
|
||||
kill_entry( 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) debug( "Could not find entry to delete in main routing table.\n" );
|
||||
else rte_update( n, p, NULL );
|
||||
|
||||
rem_node( NODE e );
|
||||
WALK_LIST( c, P->connections ) {
|
||||
@ -98,6 +119,111 @@ kill_entry( struct proto *p, struct rip_entry *e )
|
||||
mb_free( e );
|
||||
}
|
||||
|
||||
/*
|
||||
* Output processing
|
||||
*/
|
||||
|
||||
static void
|
||||
rip_tx_err( sock *s, int err )
|
||||
{
|
||||
struct rip_connection *c = s->data;
|
||||
struct proto *p = c->proto;
|
||||
log( L_ERR "Unexpected error at rip transmit\n" );
|
||||
}
|
||||
|
||||
static void
|
||||
rip_tx( sock *s )
|
||||
{
|
||||
struct rip_connection *c = s->data;
|
||||
struct proto *p = c->proto;
|
||||
struct rip_packet *packet = (void *) s->tbuf;
|
||||
int i, done = 0;
|
||||
|
||||
givemore:
|
||||
|
||||
debug( "Preparing packet to send: " );
|
||||
|
||||
if (!(NODE c->sendptr)->next) {
|
||||
debug( "Looks like I'm done\n" );
|
||||
return;
|
||||
}
|
||||
|
||||
packet->heading.command = 99; /* FIXME */
|
||||
packet->heading.version = RIP_V2;
|
||||
packet->heading.unused = 0;
|
||||
|
||||
for (i = 0; i < 25; i++) {
|
||||
if (!(NODE c->sendptr)->next)
|
||||
break;
|
||||
debug( "." );
|
||||
packet->block[i].family = htons( 0 ); /* Is it right? */
|
||||
packet->block[i].tag = htons( 0 ); /* 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( c->sendptr->metric );
|
||||
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;
|
||||
}
|
||||
|
||||
debug( ", sending %d blocks, ", i+1 );
|
||||
|
||||
i = sk_send( s, sizeof( struct rip_packet_heading ) + (i+1)*sizeof( struct rip_block ) );
|
||||
if (i<0) rip_tx_err( s, i );
|
||||
if (i>0) {
|
||||
debug( "it wants more\n" );
|
||||
goto givemore;
|
||||
}
|
||||
|
||||
debug( "blocked\n" );
|
||||
}
|
||||
|
||||
static void
|
||||
rip_sendto( struct proto *p, ip_addr daddr, int dport )
|
||||
{
|
||||
struct rip_connection *c = mb_alloc( p->pool, sizeof( struct rip_connection ));
|
||||
static int num = 0;
|
||||
|
||||
c->addr = daddr;
|
||||
c->proto = p;
|
||||
c->num = num++;
|
||||
|
||||
c->send = sk_new( p->pool );
|
||||
c->send->type = SK_UDP;
|
||||
c->send->sport = RIP_PORT;
|
||||
c->send->dport = dport;
|
||||
c->send->daddr = daddr;
|
||||
c->send->rx_hook = NULL;
|
||||
c->send->tx_hook = rip_tx;
|
||||
c->send->err_hook = rip_tx_err;
|
||||
c->send->data = c;
|
||||
c->send->tbuf = mb_alloc( p->pool, sizeof( struct rip_packet ));
|
||||
if (sk_open(c->send)<0) {
|
||||
log( L_ERR "Could not send data to %I:%d\n", daddr, dport );
|
||||
return;
|
||||
}
|
||||
|
||||
c->sendptr = HEAD( P->rtable );
|
||||
add_head( &P->connections, NODE c );
|
||||
debug( "Sending my routing table to %I:%d\n", daddr, dport );
|
||||
|
||||
rip_tx( c->send );
|
||||
}
|
||||
|
||||
|
||||
/*
|
||||
* Input processing
|
||||
*/
|
||||
|
||||
static int
|
||||
process_authentication( struct proto *p, struct rip_block *block )
|
||||
{
|
||||
return 0;
|
||||
}
|
||||
|
||||
#define DELETE( msg ) { debug( msg ); kill_entry( p, e ); e = NULL; }
|
||||
|
||||
static void
|
||||
@ -105,7 +231,7 @@ process_block( struct proto *p, struct rip_block *block, ip_addr whotoldme )
|
||||
{
|
||||
struct rip_entry *e;
|
||||
int metric = ntohl( block->metric );
|
||||
ip_addr network = ipa_from_u32( block->network );
|
||||
ip_addr network = block->network;
|
||||
|
||||
CHK_MAGIC;
|
||||
if ((!metric) || (metric > infinity)) {
|
||||
@ -119,9 +245,9 @@ process_block( struct proto *p, struct rip_block *block, ip_addr whotoldme )
|
||||
if (metric < infinity)
|
||||
metric++;
|
||||
|
||||
debug( "block: %I tells me: %I available, metric %d... ", whotoldme, network, metric );
|
||||
debug( "block: %I tells me: %I/%I available, metric %d... ", whotoldme, network, block->netmask, metric );
|
||||
|
||||
e = find_entry( p, network, ipa_from_u32( block->netmask ) );
|
||||
e = find_entry( p, network, block->netmask );
|
||||
if (e && (e->metric > metric)) /* || if same metrics and this is much newer */
|
||||
DELETE( "better metrics... " );
|
||||
|
||||
@ -144,29 +270,33 @@ process_block( struct proto *p, struct rip_block *block, ip_addr whotoldme )
|
||||
}
|
||||
#undef DELETE
|
||||
|
||||
static void
|
||||
#define BAD( x ) { log( L_WARN "RIP/%s: " x "\n", p->name ); return 1; }
|
||||
|
||||
static int
|
||||
rip_process_packet( struct proto *p, struct rip_packet *packet, int num, ip_addr whotoldme, int port )
|
||||
{
|
||||
int i;
|
||||
int native_class = 0;
|
||||
|
||||
switch( packet->heading.version ) {
|
||||
case RIP_V1: debug( "Warning: I do not talk ripv1\n" ); break;
|
||||
case RIP_V2: break;
|
||||
case '!': debug( "OOk, sir!\n" ); break;
|
||||
case RIP_V1: debug( "Rip1: " ); break;
|
||||
case RIP_V2: debug( "Rip2: " ); break;
|
||||
default: BAD( "Unknown version" );
|
||||
}
|
||||
|
||||
switch( packet->heading.command ) {
|
||||
case 1: debug( "Asked to send my routing table\n" ); break;
|
||||
case 1: debug( "Asked to send my routing table\n" );
|
||||
rip_sendto( p, whotoldme, port );
|
||||
break;
|
||||
case 2: debug( "Part of routing table came\n" );
|
||||
if (port != RIP_PORT) {
|
||||
log( L_AUTH "%I send me routing info from port %d\n", whotoldme, port );
|
||||
return;
|
||||
return 0;
|
||||
}
|
||||
|
||||
if (!neigh_find( p, &whotoldme, 0 )) {
|
||||
log( L_AUTH "%I send me routing info but he is not my neighbour\n", whotoldme );
|
||||
return;
|
||||
return 0;
|
||||
}
|
||||
|
||||
/* Should check if it is not my own packet */
|
||||
@ -178,20 +308,27 @@ rip_process_packet( struct proto *p, struct rip_packet *packet, int num, ip_addr
|
||||
if (process_authentication(p, block))
|
||||
BAD( "Authentication failed\n" );
|
||||
} else BAD( "Authentication is not the first!" );
|
||||
ipa_ntoh( block->network );
|
||||
ipa_ntoh( block->netmask );
|
||||
ipa_ntoh( block->nexthop );
|
||||
if (packet->heading.version == RIP_V1) {
|
||||
block->netmask = block->network; /* MJ: why are macros like this?! */
|
||||
ipa_class_mask( block->netmask );
|
||||
}
|
||||
process_block( p, block, whotoldme );
|
||||
}
|
||||
break;
|
||||
case 3:
|
||||
case 4: BAD( "I was asked for traceon/traceoff\n" );
|
||||
case 5: BAD( "Some Sun extension around here\n" );
|
||||
case '!': debug( "He gave me!\n" ); break;
|
||||
default: BAD( "Unknown command" );
|
||||
}
|
||||
|
||||
rip_reply(p);
|
||||
return 0;
|
||||
}
|
||||
|
||||
static void
|
||||
static int
|
||||
rip_rx(sock *s, int size)
|
||||
{
|
||||
struct proto *p = s->data;
|
||||
@ -207,13 +344,18 @@ rip_rx(sock *s, int size)
|
||||
if (num>25) BAD( "Too many blocks" );
|
||||
|
||||
rip_process_packet( p, (struct rip_packet *) s->rbuf, num, s->faddr, s->fport );
|
||||
return 1;
|
||||
}
|
||||
|
||||
/*
|
||||
* Interface to rest of bird
|
||||
*/
|
||||
|
||||
static void
|
||||
rip_dump_entry( struct rip_entry *e )
|
||||
{
|
||||
debug( "%I told me %d/%d ago: to %I/%I go via %I, metric %d\n",
|
||||
e->whotoldme, e->updated-now, e->changed-now, e->network, e->netmask, e->nexthop, e->metric );
|
||||
debug( "%I told me %d/%d ago: to %I/%d go via %I, metric %d\n",
|
||||
e->whotoldme, e->updated-now, e->changed-now, e->network, e->pxlen, e->nexthop, e->metric );
|
||||
}
|
||||
|
||||
static void
|
||||
@ -232,6 +374,11 @@ rip_timer(timer *t)
|
||||
kill_entry( p, E );
|
||||
}
|
||||
}
|
||||
|
||||
debug( "RIP: Broadcasting routing tables\n" );
|
||||
rip_sendto( p, _MI( 0x0a000001 ), RIP_PORT );
|
||||
|
||||
debug( "RIP: tick tock done\n" );
|
||||
}
|
||||
|
||||
static void
|
||||
@ -253,9 +400,9 @@ rip_start(struct proto *p)
|
||||
P->timer = tm_new( p->pool );
|
||||
P->timer->data = p;
|
||||
P->timer->randomize = 5;
|
||||
P->timer->recurrent = 30;
|
||||
P->timer->recurrent = RIP_TIME;
|
||||
P->timer->hook = rip_timer;
|
||||
tm_start( P->timer, 30 );
|
||||
tm_start( P->timer, 5 );
|
||||
|
||||
debug( "RIP: ...done\n");
|
||||
}
|
||||
@ -273,8 +420,8 @@ rip_dump(struct proto *p)
|
||||
node *w, *e;
|
||||
i = 0;
|
||||
WALK_LIST( w, P->connections ) {
|
||||
struct rip_connection *n = w;
|
||||
debug( "RIP: connection #%d: %I\n", i, n->addr );
|
||||
struct rip_connection *n = (void *) w;
|
||||
debug( "RIP: connection #%d: %I\n", n->num, n->addr );
|
||||
}
|
||||
i = 0;
|
||||
WALK_LIST( e, P->rtable ) {
|
||||
@ -283,6 +430,11 @@ rip_dump(struct proto *p)
|
||||
}
|
||||
}
|
||||
|
||||
static void
|
||||
rip_if_notify(struct proto *p, unsigned c, struct iface *old, struct iface *new)
|
||||
{
|
||||
}
|
||||
|
||||
static void
|
||||
rip_preconfig(struct protocol *x)
|
||||
{
|
||||
|
||||
@ -3,6 +3,10 @@
|
||||
*/
|
||||
|
||||
struct rip_connection {
|
||||
node n;
|
||||
|
||||
int num;
|
||||
struct proto *proto;
|
||||
ip_addr addr;
|
||||
struct rip_entry *sendptr;
|
||||
sock *send;
|
||||
@ -10,6 +14,11 @@ struct rip_connection {
|
||||
|
||||
struct rip_packet_heading {
|
||||
u8 command;
|
||||
#define RIPCMD_REQUEST 1 /* want info */
|
||||
#define RIPCMD_RESPONSE 2 /* responding to request */
|
||||
#define RIPCMD_TRACEON 3 /* turn tracing on */
|
||||
#define RIPCMD_TRACEOFF 4 /* turn it off */
|
||||
#define RIPCMD_MAX 5
|
||||
u8 version;
|
||||
#define RIP_V1 1
|
||||
#define RIP_V2 2
|
||||
@ -19,9 +28,9 @@ struct rip_packet_heading {
|
||||
struct rip_block {
|
||||
u16 family; /* 0xffff on first message means this is authentication */
|
||||
u16 tag;
|
||||
u32 network;
|
||||
u32 netmask;
|
||||
u32 nexthop;
|
||||
ip_addr network;
|
||||
ip_addr netmask;
|
||||
ip_addr nexthop;
|
||||
u32 metric;
|
||||
};
|
||||
|
||||
@ -30,7 +39,7 @@ struct rip_entry {
|
||||
ip_addr whotoldme;
|
||||
|
||||
ip_addr network;
|
||||
ip_addr netmask;
|
||||
int pxlen;
|
||||
ip_addr nexthop;
|
||||
|
||||
int metric;
|
||||
|
||||
Loading…
Reference in New Issue
Block a user