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Code Issues Releases Activity

Allow writing IP packets of length TUNMRU no matter if TUNSIFHEAD is set

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This commit is contained in:
Michael Tuexen 2016-05-19 13:52:12 +00:00
parent f0937b2cf5
commit 683300d1d5
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=300205
1 changed files with 5 additions and 2 deletions
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7
sys/net/if_tun.c
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@ -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);
}