diff options
| author | fenner <fenner@FreeBSD.org> | 1996-12-16 19:23:34 +0000 |
|---|---|---|
| committer | fenner <fenner@FreeBSD.org> | 1996-12-16 19:23:34 +0000 |
| commit | b7f56c720419d57c6fd04f8556283eb6cf9ef4e7 (patch) | |
| tree | 4463d79a8b187a5b0c35a794ad5eda0644469541 | |
| parent | ec712ef4762ea99c9ccd86fb79d59fb1e68d8213 (diff) | |
| download | FreeBSD-src-b7f56c720419d57c6fd04f8556283eb6cf9ef4e7.zip FreeBSD-src-b7f56c720419d57c6fd04f8556283eb6cf9ef4e7.tar.gz | |
Change default tun MTU back to 1500.
Use the interface MTU instead of the constant when deciding what
packets to accept.
Allow using the SIOCSIFMTU ioctl (e.g. "ifconfig tun0 mtu XXX") to
set the MTU.
| -rw-r--r-- | sys/net/if_tun.c | 7 | ||||
| -rw-r--r-- | sys/net/if_tun.h | 4 |
2 files changed, 8 insertions, 3 deletions
diff --git a/sys/net/if_tun.c b/sys/net/if_tun.c index 0b740e5..df84d53 100644 --- a/sys/net/if_tun.c +++ b/sys/net/if_tun.c @@ -268,6 +268,11 @@ tunifioctl(ifp, cmd, data) TUNDEBUG("%s%d: destination address set\n", ifp->if_name, ifp->if_unit); break; + case SIOCSIFMTU: + ifp->if_mtu = ifr->ifr_mtu; + TUNDEBUG("%s%d: mtu set\n", + ifp->if_name, ifp->if_unit); + break; case SIOCADDMULTI: case SIOCDELMULTI: if (ifr == 0) { @@ -519,7 +524,7 @@ tunwrite(dev_t dev, struct uio *uio, int flag) TUNDEBUG("%s%d: tunwrite\n", ifp->if_name, ifp->if_unit); - if (uio->uio_resid < 0 || uio->uio_resid > TUNMTU) { + if (uio->uio_resid < 0 || uio->uio_resid > ifp->if_mtu) { TUNDEBUG("%s%d: len=%d!\n", ifp->if_name, ifp->if_unit, uio->uio_resid); return EIO; diff --git a/sys/net/if_tun.h b/sys/net/if_tun.h index c31b548..404a877 100644 --- a/sys/net/if_tun.h +++ b/sys/net/if_tun.h @@ -38,8 +38,8 @@ struct tun_softc { struct selinfo tun_wsel; /* write select (not used) */ }; -/* Maximum packet size */ -#define TUNMTU 1600 +/* Default maximum packet size */ +#define TUNMTU 1500 struct tuninfo { int baudrate; /* linespeed */ |
