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-rw-r--r--proto/rip/rip.c157
1 files changed, 67 insertions, 90 deletions
diff --git a/proto/rip/rip.c b/proto/rip/rip.c
index c755c18..e471169 100644
--- a/proto/rip/rip.c
+++ b/proto/rip/rip.c
@@ -44,6 +44,15 @@ rip_reply(struct proto *p)
*/
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;
@@ -58,62 +67,6 @@ find_entry( struct proto *p, ip_addr network, int pxlen )
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_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 );
- /* FIXME: verify that it is really netmask */
- 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;
- return e;
-}
-
/* Delete one of entries */
static void
kill_entry_ourrt( struct proto *p, struct rip_entry *e )
@@ -131,6 +84,8 @@ kill_entry_ourrt( struct proto *p, struct rip_entry *e )
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 )
@@ -149,6 +104,7 @@ kill_entry( struct proto *p, struct rip_entry *e )
kill_entry_mainrt( p, e );
kill_entry_ourrt( p, e );
}
+#endif
/*
* Output processing
@@ -260,7 +216,34 @@ process_authentication( struct proto *p, struct rip_block *block )
return 0;
}
-#define DELETE( msg ) { debug( msg ); kill_entry( p, e ); e = NULL; }
+/* Let main routing table know about our new entry */
+static void
+advertise_entry( struct proto *p, struct rip_block *b, ip_addr whotoldme )
+{
+ 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 = ipa_nonzero(b->nexthop) ? b->nexthop : whotoldme;
+ A.from = whotoldme;
+ A.iface = /* FIXME: need to set somehow */ NULL;
+ /* set to: interface of nexthop */
+ a = rta_lookup(&A);
+ n = net_get( &master_table, 0, b->network, ipa_mklen( b->netmask )); /* FIXME: should verify that it really is netmask */
+ r = rte_get_temp(a);
+ r->u.rip.metric = ntohl(b->metric);
+ r->u.rip.tag = ntohl(b->tag);
+ r->pflags = 0; /* Here go my flags */
+ rte_update( n, p, r );
+}
static void
process_block( struct proto *p, struct rip_block *block, ip_addr whotoldme )
@@ -283,33 +266,8 @@ process_block( struct proto *p, struct rip_block *block, ip_addr whotoldme )
debug( "block: %I tells me: %I/%I available, metric %d... ", whotoldme, network, block->netmask, metric );
- 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... " );
-
- if (e && ((e->updated - now) > 180))
- DELETE( "more than 180 seconds old... " );
-
- if (e && ipa_equal( whotoldme, e->whotoldme ) &&
- (e->metric == metric)) {
- debug( "old news, updating time" );
- e->updated = now;
- }
-
- if (!e) {
- debug( "this is new" );
- 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 );
- }
-
- debug( "\n" );
+ advertise_entry( p, block, whotoldme );
}
-#undef DELETE
#define BAD( x ) { log( L_WARN "RIP/%s: " x "\n", p->name ); return 1; }
@@ -409,6 +367,8 @@ rip_timer(timer *t)
CHK_MAGIC;
debug( "RIP: tick tock\n" );
+#if 0
+ /* This needs to be completely redone. We need garbage collecting based on main routing table, not on our copy */
WALK_LIST_DELSAFE( e, et, P->rtable ) {
if (!(E->flags & RIP_F_EXTERNAL))
if ((now - E->updated) > (180+120)) {
@@ -417,6 +377,7 @@ rip_timer(timer *t)
kill_entry( p, E );
}
}
+#endif
#if 0
debug( "RIP: Broadcasting routing tables\n" );
@@ -486,8 +447,6 @@ 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 );
@@ -497,8 +456,6 @@ rip_rt_notify(struct proto *p, struct network *net, struct rte *new, struct rte
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 );
@@ -506,13 +463,31 @@ rip_rt_notify(struct proto *p, struct network *net, struct rte *new, struct rte
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->tag = new->u.rip.tag;
+ e->metric = new->u.rip.metric;
e->updated = e->changed = now;
- e->flags = RIP_F_EXTERNAL;
+ e->flags = 0;
+
+ add_head( &P->rtable, NODE e );
}
}
+static int /* FIXME: should not they pass me struct proto * ? */
+rip_rte_better(struct rte *new, struct rte *old)
+{
+ if (old->u.rip.metric < new->u.rip.metric)
+ return 0;
+
+ if (old->u.rip.metric > new->u.rip.metric)
+ return 1;
+
+#define old_metric_is_much_older_than_new_metric 0
+ if ((old->u.rip.metric == new->u.rip.metric) && (old_metric_is_much_older_than_new_metric))
+ return 1;
+
+ return 0;
+}
+
static void
rip_preconfig(struct protocol *x)
{
@@ -523,6 +498,8 @@ rip_preconfig(struct protocol *x)
p->start = rip_start;
p->if_notify = rip_if_notify;
p->rt_notify = rip_rt_notify;
+ p->rte_better = rip_rte_better;
+ p->rta_same = NULL; /* rip_rta_same; */
p->dump = rip_dump;
}
generated by cgit v1.2.3 (git 2.25.1) at 2024-07-02 22:02:32 +0200