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[DCCP]: Implement SIOCINQ/FIONREAD 

Just like UDP.

Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Signed-off-by: Leandro Melo de Sales <leandroal@gmail.com>
Signed-off-by: Ian McDonald <ian.mcdonald@jandi.co.nz>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Arnaldo Carvalho de Melo 2007-10-23 20:23:30 -07:00 committed by David S. Miller
parent bada339ba2
commit 6273172e17
1 changed files with 31 additions and 2 deletions
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33
net/dccp/proto.c
View File

@ -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);