yggdrasil-network/yggdrasil-go
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Fix setting up of MTU when value is outside of acceptable bounds, also account for ethernet headers in calculations, notify about clipping to stdout

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Neil Alexander 2019-11-19 14:20:11 +00:00
parent 17a711ab8a
commit f49d9de421
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GPG key ID: A02A2019A2BB0944
6 changed files with 32 additions and 16 deletions
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src/tuntap/tun_linux.go
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@ -26,7 +26,7 @@ func (tun *TunAdapter) setup(ifname string, iftapmode bool, addr string, mtu int
panic(err)
}
tun.iface = iface
tun.mtu = getSupportedMTU(mtu)
tun.mtu = getSupportedMTU(mtu, iftapmode)
// The following check is specific to Linux, as the TAP driver only supports
// an MTU of 65535-14 to make room for the ethernet headers. This makes sure
// that the MTU gets rounded down to 65521 instead of causing a panic.