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Fix combination of Mode = router and DeviceType = tap on Linux.

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I believe I have found a bug in tinc on Linux when it is used with
Mode = router and DeviceType = tap. This combination is useful because
it allows global broadcast packets to be used in router mode. However,
when tinc receives a packet in this situation, it needs to make sure its
destination MAC address matches the address of the TAP adapter, which is
typically not the case since the sending node doesn't know the MAC
address of the recipient. Unfortunately, this is not the case on Linux,
which breaks connectivity.
This commit is contained in:
Etienne Dechamps 2013-07-13 23:34:42 +01:00 • committed by Guus Sliepen
parent 24e3ec863e
commit 633b7cbb45
1 changed files with 2 additions and 0 deletions
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2
src/linux/device.c
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@ -84,6 +84,8 @@ static bool setup_device(void) {
device_type = DEVICE_TYPE_TUN;
device_info = "Linux tun/tap device (tun mode)";
} else {
if (routing_mode == RMODE_ROUTER)
overwrite_mac = true;
ifr.ifr_flags = IFF_TAP | IFF_NO_PI;
device_type = DEVICE_TYPE_TAP;
device_info = "Linux tun/tap device (tap mode)";