unsigned char *asmptr;
int size;
+ /* Netrom empty data frame has no meaning : don't send */
+ if (len == 0)
+ return 0;
+
if (msg->msg_flags & ~(MSG_DONTWAIT|MSG_EOR|MSG_CMSG_COMPAT))
return -EINVAL;
SOCK_DEBUG(sk, "NET/ROM: sendto: Addresses built.\n");
- /* Build a packet */
+ /* Build a packet - the conventional user limit is 236 bytes. We can
+ do ludicrously large NetROM frames but must not overflow */
+ if (len > 65536)
+ return -EMSGSIZE;
+
SOCK_DEBUG(sk, "NET/ROM: sendto: building packet.\n");
size = len + NR_NETWORK_LEN + NR_TRANSPORT_LEN;
skb_reset_transport_header(skb);
copied = skb->len;
+ /* NetRom empty data frame has no meaning : ignore it */
+ if (copied == 0) {
+ goto out;
+ }
+
if (copied > size) {
copied = size;
msg->msg_flags |= MSG_TRUNC;
msg->msg_namelen = sizeof(*sax);
- skb_free_datagram(sk, skb);
+out: skb_free_datagram(sk, skb);
release_sock(sk);
return copied;