diff options
| author | tuexen <tuexen@FreeBSD.org> | 2016-05-19 13:52:12 +0000 |
|---|---|---|
| committer | tuexen <tuexen@FreeBSD.org> | 2016-05-19 13:52:12 +0000 |
| commit | 513d614cdfc5c65b52972952697269935f741934 (patch) | |
| tree | 8b4073d272a7aee71051afaccf637b4b0118adc1 /sys/net/if_tun.c | |
| parent | 0412106b46a9cffa2790ddc17339d96c0dc607c9 (diff) | |
| download | FreeBSD-src-513d614cdfc5c65b52972952697269935f741934.zip FreeBSD-src-513d614cdfc5c65b52972952697269935f741934.tar.gz | |
Allow writing IP packets of length TUNMRU no matter if TUNSIFHEAD is set
or not.
Diffstat (limited to 'sys/net/if_tun.c')
| -rw-r--r-- | sys/net/if_tun.c | 7 |
1 files changed, 5 insertions, 2 deletions
diff --git a/sys/net/if_tun.c b/sys/net/if_tun.c index f5aba00..b924ca8 100644 --- a/sys/net/if_tun.c +++ b/sys/net/if_tun.c @@ -848,7 +848,7 @@ tunwrite(struct cdev *dev, struct uio *uio, int flag) 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 *uio, int flag) 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); } |
