limit writes to ifp->if_mtu not TUNMTU

diff --git a/sys/net/if_tun.c b/sys/net/if_tun.c
index 66eb121..3c13a07 100644 (file)
--- a/sys/net/if_tun.c
+++ b/sys/net/if_tun.c
@@ -1,4 +1,4 @@
-/*     $OpenBSD: if_tun.c,v 1.14 1996/06/17 11:06:18 deraadt Exp $     */
+/*     $OpenBSD: if_tun.c,v 1.15 1997/02/14 18:15:28 deraadt Exp $     */
 /*     $NetBSD: if_tun.c,v 1.24 1996/05/07 02:40:48 thorpej Exp $      */
 
 /*
@@ -548,7 +548,7 @@ tunwrite(dev, uio, ioflag)
        ifp = &tunctl[unit].tun_if;
        TUNDEBUG(("%s: tunwrite\n", ifp->if_xname));
 
-       if (uio->uio_resid < 0 || uio->uio_resid > TUNMTU) {
+       if (uio->uio_resid < 0 || uio->uio_resid > ifp->if_mtu) {
                TUNDEBUG(("%s: len=%d!\n", ifp->if_xname, uio->uio_resid));
                return EMSGSIZE;
        }