TheArchive/tailscale
1
0
Fork 0
mirror of https://github.com/tailscale/tailscale.git synced 2025-07-30 07:43:42 +00:00
Code Issues Packages Projects Releases Wiki Activity

wgengine/router: set MTU on Windows to min(configured,possible)

Browse Source 
Fixes tailscale/corp#542

Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>
(cherry picked from commit c64a43a734f52a6dd4eb01e9bc72d4b49ae3c776)
This commit is contained in:
Brad Fitzpatrick 2020-08-07 12:06:32 -07:00
parent 1c023b480a
commit aac1068fb3
1 changed files with 7 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

7
wgengine/router/ifconfig_windows.go
View File

@ -116,6 +116,13 @@ func monitorDefaultRoutes(device *device.Device, autoMTU bool, tun *tun.NativeTu
return err
}
iface.NlMtu = mtu - 80
// If the TUN device was created with a smaller MTU,
// though, such as 1280, we don't want to go bigger than
// configured. (See the comment on minimalMTU in the
// wgengine package.)
if min, err := tun.MTU(); err == nil && min < int(iface.NlMtu) {
iface.NlMtu = uint32(min)
}
if iface.NlMtu < 576 {
iface.NlMtu = 576
}