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Diffstat (limited to 'net/dccp/proto.c')
-rw-r--r--net/dccp/proto.c33
1 files changed, 31 insertions, 2 deletions
diff --git a/net/dccp/proto.c b/net/dccp/proto.c
index cc9bf1cb264..d8497392803 100644
--- a/net/dccp/proto.c
+++ b/net/dccp/proto.c
@@ -26,6 +26,7 @@
#include <net/sock.h>
#include <net/xfrm.h>
+#include <asm/ioctls.h>
#include <asm/semaphore.h>
#include <linux/spinlock.h>
#include <linux/timer.h>
@@ -378,8 +379,36 @@ EXPORT_SYMBOL_GPL(dccp_poll);
int dccp_ioctl(struct sock *sk, int cmd, unsigned long arg)
{
- dccp_pr_debug("entry\n");
- return -ENOIOCTLCMD;
+ int rc = -ENOTCONN;
+
+ lock_sock(sk);
+
+ if (sk->sk_state == DCCP_LISTEN)
+ goto out;
+
+ switch (cmd) {
+ case SIOCINQ: {
+ struct sk_buff *skb;
+ unsigned long amount = 0;
+
+ skb = skb_peek(&sk->sk_receive_queue);
+ if (skb != NULL) {
+ /*
+ * We will only return the amount of this packet since
+ * that is all that will be read.
+ */
+ amount = skb->len;
+ }
+ rc = put_user(amount, (int __user *)arg);
+ }
+ break;
+ default:
+ rc = -ENOIOCTLCMD;
+ break;
+ }
+out:
+ release_sock(sk);
+ return rc;
}
EXPORT_SYMBOL_GPL(dccp_ioctl);