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RIP now somehow listens to main routing table (dont expect it to work)

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This commit is contained in:
Pavel Machek 1998-10-07 19:33:50 +00:00
parent 8c43696da0
commit 1d941de47a
2 changed files with 136 additions and 60 deletions
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191
proto/rip/rip.c
View File

@ -1,7 +1,7 @@
/*
* Rest in pieces - RIP protocol
*
* (c) 1998 Pavel Machek <pavel@ucw.cz>
* Copyright (c) 1998 Pavel Machek <pavel@ucw.cz>
*
* Can be freely distributed and used under the terms of the GNU GPL.
*/
@ -24,10 +24,10 @@
int infinity = 16;
/* XXX should be 520 */
/* FIXME: should be 520 */
#define RIP_PORT 1520
/* XXX should be 30 */
/* FIXME: should be 30 */
#define RIP_TIME 5
static void
@ -44,26 +44,62 @@ rip_reply(struct proto *p)
*/
static struct rip_entry *
find_entry( struct proto *p, ip_addr network, ip_addr netmask )
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 ) &&
(ipa_mklen( netmask ) == E->pxlen)) {
(pxlen == E->pxlen)) {
return E;
}
}
return NULL;
}
/* Let main routing table know about our new entry */
static void
advertise_entry( struct proto *p, struct rip_entry *e )
{
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 );
}
static struct rip_entry *
new_entry( struct proto *p, struct rip_block *b, ip_addr whotoldme )
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;
}
/* Create new entry from data rip_block */
static struct rip_entry *
new_entry_from_block( struct proto *p, struct rip_block *b, ip_addr whotoldme )
{
struct rip_entry *e = new_entry( p );
e->whotoldme = whotoldme;
e->network = b->network;
e->pxlen = ipa_mklen( b->netmask );
@ -75,50 +111,43 @@ new_entry( struct proto *p, struct rip_block *b, ip_addr 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;
}
/* Delete one of entries */
static void
kill_entry( struct proto *p, struct rip_entry *e )
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) {
debug( "Deleting from under someone's sendptr...\n" );
c->sendptr = (void *) (NODE c->sendptr)->next;
}
}
mb_free( e );
}
/* 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) debug( "Could not find entry to delete in main routing table.\n" );
if (!n) log( L_ERR "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 ) {
if (c->sendptr == e)
die( "kill_entry: one of connections has this as current, fix me!" );
}
mb_free( e );
static void
kill_entry( struct proto *p, struct rip_entry *e )
{
kill_entry_mainrt( p, e );
kill_entry_ourrt( p, e );
}
/*
@ -159,11 +188,16 @@ givemore:
break;
debug( "." );
packet->block[i].family = htons( 2 ); /* AF_INET */
packet->block[i].tag = htons( 0 ); /* What should I set it to? */
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( c->sendptr->metric );
if (ipa_equal(c->sendptr->whotoldme, s->daddr)) {
debug( "(split horizont)" );
/* FIXME: should we do it in all cases? */
packet->block[i].metric = infinity;
}
ipa_hton( packet->block[i].network );
ipa_hton( packet->block[i].netmask );
ipa_hton( packet->block[i].nexthop );
@ -215,7 +249,6 @@ rip_sendto( struct proto *p, ip_addr daddr, int dport )
rip_tx( c->send );
}
/*
* Input processing
*/
@ -223,6 +256,7 @@ rip_sendto( struct proto *p, ip_addr daddr, int dport )
static int
process_authentication( struct proto *p, struct rip_block *block )
{
/* FIXME: Should do md5 authentication */
return 0;
}
@ -241,15 +275,15 @@ process_block( struct proto *p, struct rip_block *block, ip_addr whotoldme )
return;
}
/* XXX Check if destination looks valid - ie not net 0 or 127 */
/* FIXME: Check if destination looks valid - ie not net 0 or 127 */
/* XXX Should add configurable ammount */
/* FIXME: Should add configurable ammount */
if (metric < infinity)
metric++;
debug( "block: %I tells me: %I/%I available, metric %d... ", whotoldme, network, block->netmask, metric );
e = find_entry( p, network, block->netmask );
e = find_entry( p, network, ipa_mklen( block->netmask ));
if (e && (e->metric > metric)) /* || if same metrics and this is much newer */
DELETE( "better metrics... " );
@ -264,7 +298,12 @@ process_block( struct proto *p, struct rip_block *block, ip_addr whotoldme )
if (!e) {
debug( "this is new" );
e = new_entry( p, block, whotoldme );
e = new_entry_from_block( p, block, whotoldme );
if (!e) {
debug( "Something went wrong with new_entry?\n" );
return;
}
advertise_entry( p, e );
add_head( &P->rtable, NODE e );
}
@ -287,10 +326,10 @@ rip_process_packet( struct proto *p, struct rip_packet *packet, int num, ip_addr
}
switch( packet->heading.command ) {
case 1: debug( "Asked to send my routing table\n" );
case RIPCMD_REQUEST: debug( "Asked to send my routing table\n" );
rip_sendto( p, whotoldme, port );
break;
case 2: debug( "Part of routing table came\n" );
case RIPCMD_RESPONSE: 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 0;
@ -301,7 +340,7 @@ rip_process_packet( struct proto *p, struct rip_packet *packet, int num, ip_addr
return 0;
}
/* Should check if it is not my own packet */
/* FIXME: Should check if it is not my own packet */
for (i=0; i<num; i++) {
struct rip_block *block = &packet->block[i];
@ -320,8 +359,8 @@ rip_process_packet( struct proto *p, struct rip_packet *packet, int num, ip_addr
process_block( p, block, whotoldme );
}
break;
case 3:
case 4: BAD( "I was asked for traceon/traceoff\n" );
case RIPCMD_TRACEON:
case RIPCMD_TRACEOFF: BAD( "I was asked for traceon/traceoff\n" );
case 5: BAD( "Some Sun extension around here\n" );
default: BAD( "Unknown command" );
}
@ -338,7 +377,6 @@ rip_rx(sock *s, int size)
CHK_MAGIC;
debug( "RIP: message came: %d bytes\n", size );
if (size <= 0) BAD( "Zero sized packet" );
size -= sizeof( struct rip_packet_heading );
if (size < 0) BAD( "Too small packet" );
if (size % sizeof( struct rip_block )) BAD( "Odd sized packet" );
@ -356,8 +394,10 @@ rip_rx(sock *s, int size)
static void
rip_dump_entry( struct rip_entry *e )
{
debug( "%I told me %d/%d ago: to %I/%d go via %I, metric %d\n",
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 );
if (e->flags & RIP_F_EXTERNAL) debug( "[external]" );
debug( "\n" );
}
static void
@ -370,11 +410,12 @@ rip_timer(timer *t)
debug( "RIP: tick tock\n" );
WALK_LIST_DELSAFE( e, et, P->rtable ) {
if ((now - E->updated) > (180+120)) {
debug( "RIP: entry is too old: " );
rip_dump_entry( E );
kill_entry( p, E );
}
if (!(E->flags & RIP_F_EXTERNAL))
if ((now - E->updated) > (180+120)) {
debug( "RIP: entry is too old: " );
rip_dump_entry( E );
kill_entry( p, E );
}
}
#if 0
@ -382,6 +423,8 @@ rip_timer(timer *t)
rip_sendto( p, _MI( 0x0a000001 ), RIP_PORT );
#endif
/* FIXME: Should broadcast routing tables to all known interfaces every 30 seconds */
debug( "RIP: tick tock done\n" );
}
@ -439,6 +482,37 @@ rip_if_notify(struct proto *p, unsigned c, struct iface *old, struct iface *new)
{
}
static void
rip_rt_notify(struct proto *p, struct network *net, struct rte *new, struct rte *old)
{
debug( "rip: new entry came\n" );
/* FIXME: should add/delete that entry from my routing tables, and
set it so that it never times out */
if (old) {
struct rip_entry *e = find_entry( p, net->n.prefix, net->n.pxlen );
if (!e)
log( L_ERR "Deleting nonexistent entry?!\n" );
kill_entry_ourrt( p, e );
}
/* FIXME: what do we do if we already know route to that target? We were not prepared to that. */
if (new) {
struct rip_entry *e = new_entry( p );
e->whotoldme = IPA_NONE;
e->network = net->n.prefix;
e->pxlen = net->n.pxlen;
e->nexthop = IPA_NONE; /* FIXME: is it correct? */
e->tag = 0; /* FIXME: how to set tag? */
e->metric = 1; /* FIXME: how to set metric? */
e->updated = e->changed = now;
e->flags = RIP_F_EXTERNAL;
}
}
static void
rip_preconfig(struct protocol *x)
{
@ -448,6 +522,7 @@ rip_preconfig(struct protocol *x)
p->preference = DEF_PREF_DIRECT;
p->start = rip_start;
p->if_notify = rip_if_notify;
p->rt_notify = rip_rt_notify;
p->dump = rip_dump;
}

5
proto/rip/rip.h
View File

@ -36,16 +36,17 @@ struct rip_block {
struct rip_entry {
node n;
ip_addr whotoldme;
ip_addr whotoldme;
ip_addr network;
int pxlen;
ip_addr nexthop;
int metric;
u16 tag;
bird_clock_t updated, changed;
int flags;
#define RIP_F_EXTERNAL 1
};
struct rip_packet {