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Revert "rose: zero length frame filtering in af_rose.c"

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This reverts commit 244f46ae6e.

Alan Cox did the research, and just like the other radio protocols
zero-length frames have meaning because at the top level ROSE is
X.25 PLP.

So this zero-length filtering is invalid.

Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
David S. Miller 2009-04-14 20:28:00 -07:00
parent 239795adf7
commit 6fd4777a1f
1 changed files with 0 additions and 10 deletions
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10
net/rose/af_rose.c
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@ -1072,10 +1072,6 @@ static int rose_sendmsg(struct kiocb *iocb, struct socket *sock,
unsigned char *asmptr; unsigned char *asmptr;
int n, size, qbit = 0; int n, size, qbit = 0;
/* ROSE empty frame has no meaning : don't send */
if (len == 0)
return 0;
if (msg->msg_flags & ~(MSG_DONTWAIT|MSG_EOR|MSG_CMSG_COMPAT)) if (msg->msg_flags & ~(MSG_DONTWAIT|MSG_EOR|MSG_CMSG_COMPAT))
return -EINVAL; return -EINVAL;
@ -1273,12 +1269,6 @@ static int rose_recvmsg(struct kiocb *iocb, struct socket *sock,
skb_reset_transport_header(skb); skb_reset_transport_header(skb);
copied = skb->len; copied = skb->len;
/* ROSE empty frame has no meaning : ignore it */
if (copied == 0) {
skb_free_datagram(sk, skb);
return copied;
}
if (copied > size) { if (copied > size) {
copied = size; copied = size;
msg->msg_flags |= MSG_TRUNC; msg->msg_flags |= MSG_TRUNC;