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Revert "rose: zero length frame filtering in af_rose.c"
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:
parent
239795adf7
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@ -1072,10 +1072,6 @@ static int rose_sendmsg(struct kiocb *iocb, struct socket *sock,
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unsigned char *asmptr;
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int n, size, qbit = 0;
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/* ROSE empty frame has no meaning : don't send */
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if (len == 0)
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return 0;
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if (msg->msg_flags & ~(MSG_DONTWAIT|MSG_EOR|MSG_CMSG_COMPAT))
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return -EINVAL;
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@ -1273,12 +1269,6 @@ static int rose_recvmsg(struct kiocb *iocb, struct socket *sock,
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skb_reset_transport_header(skb);
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copied = skb->len;
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/* ROSE empty frame has no meaning : ignore it */
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if (copied == 0) {
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skb_free_datagram(sk, skb);
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return copied;
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}
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if (copied > size) {
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copied = size;
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msg->msg_flags |= MSG_TRUNC;
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