[PATCH] (7/15) ax25 - size_t in send/recvmsg

[Stephen Hemminger <shemminger@xxxxxxxx>]

Convert Amateur Radio X.25 to unsigned size for send/receive.
Also enforce an MTU here, since there is no fragmentation logic.

diff -Nru a/net/ax25/af_ax25.c b/net/ax25/af_ax25.c
--- a/net/ax25/af_ax25.c        Mon Dec  8 16:19:49 2003
+++ b/net/ax25/af_ax25.c        Mon Dec  8 16:19:49 2003
@@ -1415,7 +1415,7 @@
 }
 
 static int ax25_sendmsg(struct kiocb *iocb, struct socket *sock,
-                       struct msghdr *msg, int len)
+                       struct msghdr *msg, size_t len)
 {
        struct sockaddr_ax25 *usax = (struct sockaddr_ax25 *)msg->msg_name;
        struct sock *sk = sock->sk;
@@ -1424,7 +1424,8 @@
        ax25_digi dtmp, *dp;
        unsigned char *asmptr;
        ax25_cb *ax25;
-       int lv, size, err, addr_len = msg->msg_namelen;
+       size_t size;
+       int lv, err, addr_len = msg->msg_namelen;
 
        if (msg->msg_flags & ~(MSG_DONTWAIT|MSG_EOR)) {
                return -EINVAL;
@@ -1449,6 +1450,11 @@
                goto out;
        }
 
+       if (len > ax25->ax25_dev->dev->mtu) {
+               err = -EMSGSIZE;
+               goto out;
+       }
+               
        if (usax != NULL) {
                if (usax->sax25_family != AF_AX25) {
                        err = -EINVAL;
@@ -1594,7 +1600,7 @@
 }
 
 static int ax25_recvmsg(struct kiocb *iocb, struct socket *sock,
-       struct msghdr *msg, int size, int flags)
+       struct msghdr *msg, size_t size, int flags)
 {
        struct sock *sk = sock->sk;
        struct sk_buff *skb;