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Update Windows module a bit - capture TAP setup errors earlier, refer to newer version of water which should fix #456

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This commit is contained in:
Neil Alexander 2019-07-19 22:21:30 +01:00
parent 85881c04fa
commit 1a5c2a4942
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GPG key ID: A02A2019A2BB0944
3 changed files with 48 additions and 20 deletions
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44
src/tuntap/tun_windows.go
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@ -1,6 +1,7 @@
package tuntap
import (
"errors"
"fmt"
"os/exec"
"strings"
@ -27,23 +28,13 @@ func (tun *TunAdapter) setup(ifname string, iftapmode bool, addr string, mtu int
}
iface, err := water.New(config)
if err != nil {
panic(err)
}
// Disable/enable the interface to resets its configuration (invalidating iface)
cmd := exec.Command("netsh", "interface", "set", "interface", iface.Name(), "admin=DISABLED")
tun.log.Debugln("netsh command:", strings.Join(cmd.Args, " "))
output, err := cmd.CombinedOutput()
if err != nil {
tun.log.Errorln("Windows netsh failed:", err)
tun.log.Traceln(string(output))
return err
}
cmd = exec.Command("netsh", "interface", "set", "interface", iface.Name(), "admin=ENABLED")
tun.log.Debugln("netsh command:", strings.Join(cmd.Args, " "))
output, err = cmd.CombinedOutput()
if err != nil {
tun.log.Errorln("Windows netsh failed:", err)
tun.log.Traceln(string(output))
if iface.Name() == "" {
return errors.New("unable to find TAP adapter with component ID " + config.PlatformSpecificParams.ComponentID)
}
// Reset the adapter - this invalidates iface so we'll need to get a new one
if err := tun.resetAdapter(); err != nil {
return err
}
// Get a new iface
@ -64,6 +55,29 @@ func (tun *TunAdapter) setup(ifname string, iftapmode bool, addr string, mtu int
return tun.setupAddress(addr)
}
// Disable/enable the interface to reset its configuration (invalidating iface).
func (tun *TunAdapter) resetAdapter() error {
// Bring down the interface first
cmd := exec.Command("netsh", "interface", "set", "interface", tun.iface.Name(), "admin=DISABLED")
tun.log.Debugln("netsh command:", strings.Join(cmd.Args, " "))
output, err := cmd.CombinedOutput()
if err != nil {
tun.log.Errorln("Windows netsh failed:", err)
tun.log.Traceln(string(output))
return err
}
// Bring the interface back up
cmd = exec.Command("netsh", "interface", "set", "interface", tun.iface.Name(), "admin=ENABLED")
tun.log.Debugln("netsh command:", strings.Join(cmd.Args, " "))
output, err = cmd.CombinedOutput()
if err != nil {
tun.log.Errorln("Windows netsh failed:", err)
tun.log.Traceln(string(output))
return err
}
return nil
}
// Sets the MTU of the TAP adapter.
func (tun *TunAdapter) setupMTU(mtu int) error {
// Set MTU