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nat: Fix error in get_next_free_bsc_id

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The new function now mimcis the behaviour of
assign_src_local_reference from bsc_sccp.c
This commit is contained in:
Daniel Willmann
2011-07-16 21:42:53 +02:00
committed by Holger Hans Peter Freyther
parent 7c3298af9e
commit e54db171ee
1 changed files with 20 additions and 15 deletions
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35
openbsc/src/osmo-bsc_nat/bsc_nat.c
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@@ -1534,34 +1534,39 @@ static struct vty_app_info vty_info = {
.is_config_node = bsc_vty_is_config_node,
};
static int bsc_id_unused(int id, struct bsc_connection *bsc)
{
struct bsc_cmd_list *pending;
llist_for_each_entry(pending, &bsc->cmd_pending, list_entry) {
if (pending->nat_id == id)
return 0;
}
return 1;
}
#define NAT_MAX_CTRL_ID 65535
static int get_next_free_bsc_id(struct bsc_connection *bsc)
{
int new_id, overflow = 0;
struct bsc_cmd_list *pending;
new_id = bsc->last_id;
do {
new_id++;
if (new_id <= 0) {
if (new_id == NAT_MAX_CTRL_ID) {
new_id = 1;
overflow++;
}
llist_for_each_entry(pending, &bsc->cmd_pending, list_entry) {
if (pending->nat_id == new_id)
continue;
if (bsc_id_unused(new_id, bsc)) {
bsc->last_id = new_id;
return new_id;
}
} while (overflow != 2);
/* ID is not in use */
break;
} while ((new_id != bsc->last_id) && (overflow < 2));
if ((new_id == bsc->last_id) || (overflow == 2)) {
return -1;
} else {
bsc->last_id = new_id;
return new_id;
}
return -1;
}
static void pending_timeout_cb(void *data)