Author: tuexen
Date: Thu May 19 13:52:12 2016
New Revision: 300205
URL: https://svnweb.freebsd.org/changeset/base/300205
Log:
Allow writing IP packets of length TUNMRU no matter if TUNSIFHEAD is set
or not.
Modified:
head/sys/net/if_tun.c
Modified: head/sys/net/if_tun.c
==============================================================================
--- head/sys/net/if_tun.c Thu May 19 13:32:44 2016 (r300204)
+++ head/sys/net/if_tun.c Thu May 19 13:52:12 2016 (r300205)
@@ -848,7 +848,7 @@ tunwrite(struct cdev *dev, struct uio *u
struct tun_softc *tp = dev->si_drv1;
struct ifnet *ifp = TUN2IFP(tp);
struct mbuf *m;
- uint32_t family;
+ uint32_t family, mru;
int isr;
TUNDEBUG(ifp, "tunwrite\n");
@@ -860,7 +860,10 @@ tunwrite(struct cdev *dev, struct uio *u
if (uio->uio_resid == 0)
return (0);
- if (uio->uio_resid < 0 || uio->uio_resid > TUNMRU) {
+ mru = TUNMRU;
+ if (tp->tun_flags & TUN_IFHEAD)
+ mru += sizeof(family);
+ if (uio->uio_resid < 0 || uio->uio_resid > mru) {
TUNDEBUG(ifp, "len=%zd!\n", uio->uio_resid);
return (EIO);
}
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