diff options
Diffstat (limited to 'net/ax25/af_ax25.c')
| -rw-r--r-- | net/ax25/af_ax25.c | 21 |
1 files changed, 15 insertions, 6 deletions
diff --git a/net/ax25/af_ax25.c b/net/ax25/af_ax25.c index 00d9e5e13158..7da5ebb84e97 100644 --- a/net/ax25/af_ax25.c +++ b/net/ax25/af_ax25.c @@ -1435,6 +1435,11 @@ static int ax25_sendmsg(struct kiocb *iocb, struct socket *sock, size_t size; int lv, err, addr_len = msg->msg_namelen; + /* AX.25 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; @@ -1529,10 +1534,8 @@ static int ax25_sendmsg(struct kiocb *iocb, struct socket *sock, dp = ax25->digipeat; } - SOCK_DEBUG(sk, "AX.25: sendto: Addresses built.\n"); - /* Build a packet */ - SOCK_DEBUG(sk, "AX.25: sendto: building packet.\n"); + SOCK_DEBUG(sk, "AX.25: sendto: Addresses built. Building packet.\n"); /* Assume the worst case */ size = len + ax25->ax25_dev->dev->hard_header_len; @@ -1636,6 +1639,13 @@ static int ax25_recvmsg(struct kiocb *iocb, struct socket *sock, skb_reset_transport_header(skb); copied = skb->len; + /* AX.25 empty data frame has no meaning : ignore it */ + if (copied == 0) { + err = copied; + skb_free_datagram(sk, skb); + goto out; + } + if (copied > size) { copied = size; msg->msg_flags |= MSG_TRUNC; @@ -1985,9 +1995,8 @@ static const struct proto_ops ax25_proto_ops = { /* * Called by socket.c on kernel start up */ -static struct packet_type ax25_packet_type = { - .type = __constant_htons(ETH_P_AX25), - .dev = NULL, /* All devices */ +static struct packet_type ax25_packet_type __read_mostly = { + .type = cpu_to_be16(ETH_P_AX25), .func = ax25_kiss_rcv, }; |