Nest: Allow iface-only neighbors
This commit is contained in:
Ondrej Zajicek (work)
Jan Moskyto Matejka
parent
039a65d0e4
commit
5ffb62dd03
2 changed files with 96 additions and 35 deletions
|
|
@ -121,9 +121,12 @@ typedef struct neighbor {
|
|||
#define NEF_STICKY 1
|
||||
#define NEF_ONLINK 2
|
||||
#define NEF_BIND 4 /* Used internally for neighbors bound to an iface */
|
||||
#define NEF_IFACE 8 /* Neighbors bound to iface */
|
||||
|
||||
|
||||
neighbor *neigh_find(struct proto *, ip_addr *, unsigned flags);
|
||||
neighbor *neigh_find2(struct proto *p, ip_addr *a, struct iface *ifa, unsigned flags);
|
||||
neighbor *neigh_find_iface(struct proto *p, struct iface *ifa);
|
||||
|
||||
static inline int neigh_connected_to(struct proto *p, ip_addr *a, struct iface *i)
|
||||
{
|
||||
|
|
|
|||
108
nest/neighbor.c
108
nest/neighbor.c
|
|
@ -48,7 +48,7 @@
|
|||
#define NEIGH_HASH_OFFSET 24
|
||||
|
||||
static slab *neigh_slab;
|
||||
static list sticky_neigh_list, neigh_hash_table[NEIGH_HASH_SIZE];
|
||||
static list sticky_neigh_list, iface_neigh_list, neigh_hash_table[NEIGH_HASH_SIZE];
|
||||
|
||||
static inline uint
|
||||
neigh_hash(struct proto *p, ip_addr *a)
|
||||
|
|
@ -166,6 +166,8 @@ neigh_find2(struct proto *p, ip_addr *a, struct iface *ifa, unsigned flags)
|
|||
return NULL;
|
||||
|
||||
n = sl_alloc(neigh_slab);
|
||||
memset(n, 0, sizeof(neighbor));
|
||||
|
||||
n->addr = *a;
|
||||
if (scope >= 0)
|
||||
{
|
||||
|
|
@ -187,6 +189,35 @@ neigh_find2(struct proto *p, ip_addr *a, struct iface *ifa, unsigned flags)
|
|||
return n;
|
||||
}
|
||||
|
||||
neighbor *
|
||||
neigh_find_iface(struct proto *p, struct iface *ifa)
|
||||
{
|
||||
neighbor *n;
|
||||
node *nn;
|
||||
|
||||
/* We keep neighbors with NEF_IFACE foremost in ifa->neighbors list */
|
||||
WALK_LIST2(n, nn, ifa->neighbors, if_n)
|
||||
{
|
||||
if (! (n->flags & NEF_IFACE))
|
||||
break;
|
||||
|
||||
if (n->proto == p)
|
||||
return n;
|
||||
}
|
||||
|
||||
n = sl_alloc(neigh_slab);
|
||||
memset(n, 0, sizeof(neighbor));
|
||||
|
||||
add_tail(&iface_neigh_list, &n->n);
|
||||
add_head(&ifa->neighbors, &n->if_n);
|
||||
n->iface = ifa;
|
||||
n->proto = p;
|
||||
n->flags = NEF_IFACE;
|
||||
n->scope = (ifa->flags & IF_UP) ? SCOPE_HOST : -1;
|
||||
|
||||
return n;
|
||||
}
|
||||
|
||||
/**
|
||||
* neigh_dump - dump specified neighbor entry.
|
||||
* @n: the entry to dump
|
||||
|
|
@ -205,6 +236,8 @@ neigh_dump(neighbor *n)
|
|||
debug("%s %p %08x scope %s", n->proto->name, n->data, n->aux, ip_scope_text(n->scope));
|
||||
if (n->flags & NEF_STICKY)
|
||||
debug(" STICKY");
|
||||
if (n->flags & NEF_IFACE)
|
||||
debug(" IFACE");
|
||||
debug("\n");
|
||||
}
|
||||
|
||||
|
|
@ -223,6 +256,8 @@ neigh_dump_all(void)
|
|||
debug("Known neighbors:\n");
|
||||
WALK_LIST(n, sticky_neigh_list)
|
||||
neigh_dump(n);
|
||||
WALK_LIST(n, iface_neigh_list)
|
||||
neigh_dump(n);
|
||||
for(i=0; i<NEIGH_HASH_SIZE; i++)
|
||||
WALK_LIST(n, neigh_hash_table[i])
|
||||
neigh_dump(n);
|
||||
|
|
@ -232,13 +267,18 @@ neigh_dump_all(void)
|
|||
static void
|
||||
neigh_up(neighbor *n, struct iface *i, int scope, struct ifa *a)
|
||||
{
|
||||
DBG("Waking up sticky neighbor %I\n", n->addr);
|
||||
n->iface = i;
|
||||
n->ifa = a;
|
||||
n->scope = scope;
|
||||
|
||||
if (! (n->flags & NEF_IFACE))
|
||||
{
|
||||
add_tail(&i->neighbors, &n->if_n);
|
||||
rem_node(&n->n);
|
||||
add_tail(&neigh_hash_table[neigh_hash(n->proto, &n->addr)], &n->n);
|
||||
DBG("Waking up sticky neighbor %I\n", n->addr);
|
||||
}
|
||||
|
||||
if (n->proto->neigh_notify && (n->proto->proto_state != PS_STOP))
|
||||
n->proto->neigh_notify(n);
|
||||
}
|
||||
|
|
@ -247,14 +287,20 @@ static void
|
|||
neigh_down(neighbor *n)
|
||||
{
|
||||
DBG("Flushing neighbor %I on %s\n", n->addr, n->iface->name);
|
||||
rem_node(&n->if_n);
|
||||
if (! (n->flags & NEF_BIND))
|
||||
if (! (n->flags & (NEF_BIND | NEF_IFACE)))
|
||||
n->iface = NULL;
|
||||
n->ifa = NULL;
|
||||
n->scope = -1;
|
||||
|
||||
if (! (n->flags & NEF_IFACE))
|
||||
{
|
||||
rem_node(&n->if_n);
|
||||
rem_node(&n->n);
|
||||
}
|
||||
|
||||
if (n->proto->neigh_notify && (n->proto->proto_state != PS_STOP))
|
||||
n->proto->neigh_notify(n);
|
||||
rem_node(&n->n);
|
||||
|
||||
if (n->flags & NEF_STICKY)
|
||||
{
|
||||
add_tail(&sticky_neigh_list, &n->n);
|
||||
|
|
@ -272,7 +318,8 @@ neigh_down(neighbor *n)
|
|||
return;
|
||||
}
|
||||
}
|
||||
else
|
||||
|
||||
if (! (n->flags & (NEF_STICKY | NEF_IFACE)))
|
||||
sl_free(neigh_slab, n);
|
||||
}
|
||||
|
||||
|
|
@ -290,10 +337,17 @@ void
|
|||
neigh_if_up(struct iface *i)
|
||||
{
|
||||
struct ifa *a;
|
||||
neighbor *n, *next;
|
||||
neighbor *n;
|
||||
node *x, *y;
|
||||
int scope;
|
||||
|
||||
WALK_LIST_DELSAFE(n, next, sticky_neigh_list)
|
||||
/* Wake up all iface neighbors */
|
||||
WALK_LIST2_DELSAFE(n, x, y, i->neighbors, if_n)
|
||||
if ((n->scope < 0) && (n->flags & NEF_IFACE))
|
||||
neigh_up(n, i, SCOPE_HOST, NULL);
|
||||
|
||||
/* Wake up appropriate sticky neighbors */
|
||||
WALK_LIST_DELSAFE(n, x, sticky_neigh_list)
|
||||
if ((!n->iface || n->iface == i) &&
|
||||
((scope = if_connected(&n->addr, i, &a)) >= 0))
|
||||
neigh_up(n, i, scope, a);
|
||||
|
|
@ -311,10 +365,11 @@ neigh_if_up(struct iface *i)
|
|||
void
|
||||
neigh_if_down(struct iface *i)
|
||||
{
|
||||
neighbor *n;
|
||||
node *x, *y;
|
||||
|
||||
WALK_LIST_DELSAFE(x, y, i->neighbors)
|
||||
neigh_down(SKIP_BACK(neighbor, if_n, x));
|
||||
WALK_LIST2_DELSAFE(n, x, y, i->neighbors, if_n)
|
||||
neigh_down(n);
|
||||
}
|
||||
|
||||
/**
|
||||
|
|
@ -328,15 +383,13 @@ neigh_if_down(struct iface *i)
|
|||
void
|
||||
neigh_if_link(struct iface *i)
|
||||
{
|
||||
neighbor *n;
|
||||
node *x, *y;
|
||||
|
||||
WALK_LIST_DELSAFE(x, y, i->neighbors)
|
||||
{
|
||||
neighbor *n = SKIP_BACK(neighbor, if_n, x);
|
||||
WALK_LIST2_DELSAFE(n, x, y, i->neighbors, if_n)
|
||||
if (n->proto->neigh_notify && (n->proto->proto_state != PS_STOP))
|
||||
n->proto->neigh_notify(n);
|
||||
}
|
||||
}
|
||||
|
||||
/**
|
||||
* neigh_ifa_update: notify neighbor cache about interface address add or remove event
|
||||
|
|
@ -352,19 +405,21 @@ void
|
|||
neigh_ifa_update(struct ifa *a)
|
||||
{
|
||||
struct iface *i = a->iface;
|
||||
struct ifa *aa;
|
||||
node *x, *y;
|
||||
neighbor *n;
|
||||
int scope;
|
||||
|
||||
/* Remove all neighbors whose scope has changed */
|
||||
WALK_LIST_DELSAFE(x, y, i->neighbors)
|
||||
{
|
||||
struct ifa *aa;
|
||||
neighbor *n = SKIP_BACK(neighbor, if_n, x);
|
||||
if (if_connected(&n->addr, i, &aa) != n->scope)
|
||||
WALK_LIST2_DELSAFE(n, x, y, i->neighbors, if_n)
|
||||
if (n->ifa && (if_connected(&n->addr, i, &aa) != n->scope))
|
||||
neigh_down(n);
|
||||
}
|
||||
|
||||
/* Wake up all sticky neighbors that are reachable now */
|
||||
neigh_if_up(i);
|
||||
WALK_LIST_DELSAFE(n, x, sticky_neigh_list)
|
||||
if ((!n->iface || n->iface == i) &&
|
||||
((scope = if_connected(&n->addr, i, &aa)) >= 0))
|
||||
neigh_up(n, i, scope, aa);
|
||||
}
|
||||
|
||||
static inline void
|
||||
|
|
@ -373,7 +428,7 @@ neigh_prune_one(neighbor *n)
|
|||
if (n->proto->proto_state != PS_DOWN)
|
||||
return;
|
||||
rem_node(&n->n);
|
||||
if (n->scope >= 0)
|
||||
if (n->if_n.next)
|
||||
rem_node(&n->if_n);
|
||||
sl_free(neigh_slab, n);
|
||||
}
|
||||
|
|
@ -398,6 +453,8 @@ neigh_prune(void)
|
|||
neigh_prune_one(n);
|
||||
WALK_LIST_DELSAFE(n, m, sticky_neigh_list)
|
||||
neigh_prune_one(n);
|
||||
WALK_LIST_DELSAFE(n, m, iface_neigh_list)
|
||||
neigh_prune_one(n);
|
||||
}
|
||||
|
||||
/**
|
||||
|
|
@ -410,10 +467,11 @@ neigh_prune(void)
|
|||
void
|
||||
neigh_init(pool *if_pool)
|
||||
{
|
||||
int i;
|
||||
|
||||
neigh_slab = sl_new(if_pool, sizeof(neighbor));
|
||||
|
||||
init_list(&sticky_neigh_list);
|
||||
for(i=0; i<NEIGH_HASH_SIZE; i++)
|
||||
init_list(&iface_neigh_list);
|
||||
|
||||
for(int i = 0; i < NEIGH_HASH_SIZE; i++)
|
||||
init_list(&neigh_hash_table[i]);
|
||||
}
|
||||
|
|
|
|||
Loading…
Reference in a new issue