diff options
| -rw-r--r-- | proto/rip/rip.c | 157 |
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; } |