mirror/labs-bird
1
0
Fork 0
mirror of https://gitlab.labs.nic.cz/labs/bird.git synced 2024-05-11 16:54:54 +00:00
Code Releases Activity

Reimplemented neighbor cache. Now uses real hashing.

Browse Source
This commit is contained in:
Martin Mares
2000-03-01 14:51:47 +00:00
parent 7293c5dd81
commit 85053fce04
5 changed files with 213 additions and 185 deletions
Download Patch File Download Diff File Expand all files Collapse all files

173
nest/iface.c
View File

@@ -1,7 +1,7 @@
/*
* BIRD -- Management of Interfaces and Neighbor Cache
*
* (c) 1998--1999 Martin Mares <mj@ucw.cz>
* (c) 1998--2000 Martin Mares <mj@ucw.cz>
*
* Can be freely distributed and used under the terms of the GNU GPL.
*/
@@ -20,174 +20,6 @@ static pool *if_pool;
static void auto_router_id(void);
/*
* Neighbor Cache
*
* FIXME: Use hashing to get some real speed.
*/
static slab *neigh_slab;
static list neigh_list;
static int
if_connected(ip_addr *a, struct iface *i) /* -1=error, 1=match, 0=no match */
{
struct ifa *b;
if (!(i->flags & IF_UP))
return 0;
WALK_LIST(b, i->addrs)
{
if (ipa_equal(*a, b->ip))
return -1;
if (b->flags & IA_UNNUMBERED)
{
if (ipa_equal(*a, b->opposite))
return 1;
}
else
{
if (ipa_in_net(*a, b->prefix, b->pxlen))
{
if (ipa_equal(*a, b->prefix) || /* Network address */
ipa_equal(*a, b->brd)) /* Broadcast */
return -1;
return 1;
}
}
}
return 0;
}
neighbor *
neigh_find(struct proto *p, ip_addr *a, unsigned flags)
{
neighbor *n;
int class;
struct iface *i, *j;
WALK_LIST(n, neigh_list)
if (n->proto == p && ipa_equal(*a, n->addr))
return n;
class = ipa_classify(*a);
if (class < 0) /* Invalid address */
return NULL;
if ((class & IADDR_SCOPE_MASK) < SCOPE_SITE ||
!(class & IADDR_HOST))
return NULL; /* Bad scope or a somecast */
j = NULL;
WALK_LIST(i, iface_list)
switch (if_connected(a, i))
{
case -1:
return NULL;
case 1:
if (!j) /* FIXME: Search for _optimal_ iface route? */
j = i;
/* Fall-thru */
}
if (!j && !(flags & NEF_STICKY))
return NULL;
n = sl_alloc(neigh_slab);
n->addr = *a;
n->iface = j;
add_tail(&neigh_list, &n->n);
if (j)
add_tail(&j->neighbors, &n->if_n);
n->proto = p;
n->data = NULL;
n->aux = 0;
n->flags = flags;
return n;
}
void
neigh_dump(neighbor *n)
{
debug("%p %I ", n, n->addr);
if (n->iface)
debug("%s ", n->iface->name);
else
debug("[] ");
debug("%s %p %08x", n->proto->name, n->data, n->aux);
if (n->flags & NEF_STICKY)
debug(" STICKY");
debug("\n");
}
void
neigh_dump_all(void)
{
neighbor *n;
debug("Known neighbors:\n");
WALK_LIST(n, neigh_list)
neigh_dump(n);
debug("\n");
}
static void
neigh_if_up(struct iface *i)
{
neighbor *n;
WALK_LIST(n, neigh_list)
if (!n->iface &&
if_connected(&n->addr, i) > 0)
{
n->iface = i;
add_tail(&i->neighbors, &n->if_n);
DBG("Waking up sticky neighbor %I\n", n->addr);
if (n->proto->neigh_notify && n->proto->core_state != FS_FLUSHING)
n->proto->neigh_notify(n);
}
}
static void
neigh_if_down(struct iface *i)
{
node *x, *y;
WALK_LIST_DELSAFE(x, y, i->neighbors)
{
neighbor *n = SKIP_BACK(neighbor, if_n, x);
DBG("Flushing neighbor %I on %s\n", n->addr, i->name);
rem_node(&n->if_n);
n->iface = NULL;
if (n->proto->neigh_notify && n->proto->core_state != FS_FLUSHING)
n->proto->neigh_notify(n);
if (!(n->flags & NEF_STICKY))
{
rem_node(&n->n);
sl_free(neigh_slab, n);
}
}
}
void
neigh_prune(void)
{
neighbor *n;
node *m;
DBG("Pruning neighbors\n");
WALK_LIST_DELSAFE(n, m, neigh_list)
if (n->proto->core_state == FS_FLUSHING)
{
rem_node(&n->n);
if (n->iface)
rem_node(&n->if_n);
sl_free(neigh_slab, n);
}
}
/*
* The Interface List
*/
list iface_list;
void
@@ -577,8 +409,7 @@ if_init(void)
{
if_pool = rp_new(&root_pool, "Interfaces");
init_list(&iface_list);
neigh_slab = sl_new(if_pool, sizeof(neighbor));
init_list(&neigh_list);
neigh_init(if_pool);
}
/*