imrcpan/erofs-linux
1
0 Fork 0
mirror of git://git.kernel.org/pub/scm/linux/kernel/git/xiang/erofs.git synced 2026-10-28 21:02:43 +01:00
Code Issues Packages Projects Releases Wiki Activity

netlink: make socket filters work on netlink

Browse Source 
Make socket filters work for netlink unicast and notifications.
This is useful for applications like Zebra that get overrun with
messages that are then ignored.

Note: netlink messages are in host byte order, but packet filter
state machine operations are done as network byte order.

Signed-off-by: Stephen Hemminger <[email protected]>
Signed-off-by: David S. Miller <[email protected]>
This commit is contained in:
Stephen Hemminger authored and David S. Miller committed 2008-03-21 15:46:12 -07:00
1 parent 6f8b13bcb3
commit b1153f29ee
1 file changed
+23 -4
Download Patch File Download Diff File Expand all files Collapse all files
net/netlink/af_netlink.c
+23 -4
View File
@@ -886,6 +886,13 @@ retry:
if (netlink_is_kernel(sk))
return netlink_unicast_kernel(sk, skb);
if (sk_filter(sk, skb)) {
int err = skb->len;
kfree_skb(skb);
sock_put(sk);
return err;
}
err = netlink_attachskb(sk, skb, nonblock, &timeo, ssk);
if (err == 1)
goto retry;
@@ -980,6 +987,9 @@ static inline int do_one_broadcast(struct sock *sk,
netlink_overrun(sk);
/* Clone failed. Notify ALL listeners. */
p->failure = 1;
} else if (sk_filter(sk, p->skb2)) {
kfree_skb(p->skb2);
p->skb2 = NULL;
} else if ((val = netlink_broadcast_deliver(sk, p->skb2)) < 0) {
netlink_overrun(sk);
} else {
@@ -1533,8 +1543,13 @@ static int netlink_dump(struct sock *sk)
if (len > 0) {
mutex_unlock(nlk->cb_mutex);
skb_queue_tail(&sk->sk_receive_queue, skb);
sk->sk_data_ready(sk, len);
if (sk_filter(sk, skb))
kfree_skb(skb);
else {
skb_queue_tail(&sk->sk_receive_queue, skb);
sk->sk_data_ready(sk, skb->len);
}
return 0;
}
@@ -1544,8 +1559,12 @@ static int netlink_dump(struct sock *sk)
memcpy(nlmsg_data(nlh), &len, sizeof(len));
skb_queue_tail(&sk->sk_receive_queue, skb);
sk->sk_data_ready(sk, skb->len);
if (sk_filter(sk, skb))
kfree_skb(skb);
else {
skb_queue_tail(&sk->sk_receive_queue, skb);
sk->sk_data_ready(sk, skb->len);
}
if (cb->done)
cb->done(cb);