mirror of
https://github.com/cwinfo/yggdrasil-go.git
synced 2024-12-25 13:05:42 +00:00
100 lines
3.0 KiB
Go
100 lines
3.0 KiB
Go
package tuntap
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import (
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"fmt"
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"os/exec"
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"strings"
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water "github.com/yggdrasil-network/water"
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)
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// This is to catch Windows platforms
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// Configures the TAP adapter with the correct IPv6 address and MTU. On Windows
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// we don't make use of a direct operating system API to do this - we instead
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// delegate the hard work to "netsh".
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func (tun *TunAdapter) setup(ifname string, iftapmode bool, addr string, mtu int) error {
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if !iftapmode {
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tun.log.Warnln("TUN mode is not supported on this platform, defaulting to TAP")
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}
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config := water.Config{DeviceType: water.TAP}
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config.PlatformSpecificParams.ComponentID = "tap0901"
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config.PlatformSpecificParams.Network = "169.254.0.1/32"
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if ifname == "auto" {
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config.PlatformSpecificParams.InterfaceName = ""
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} else {
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config.PlatformSpecificParams.InterfaceName = ifname
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}
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iface, err := water.New(config)
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if err != nil {
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panic(err)
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}
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// Disable/enable the interface to resets its configuration (invalidating iface)
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cmd := exec.Command("netsh", "interface", "set", "interface", iface.Name(), "admin=DISABLED")
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tun.log.Printf("netsh command: %v", strings.Join(cmd.Args, " "))
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output, err := cmd.CombinedOutput()
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if err != nil {
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tun.log.Errorf("Windows netsh failed: %v.", err)
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tun.log.Traceln(string(output))
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return err
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}
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cmd = exec.Command("netsh", "interface", "set", "interface", iface.Name(), "admin=ENABLED")
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tun.log.Printf("netsh command: %v", strings.Join(cmd.Args, " "))
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output, err = cmd.CombinedOutput()
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if err != nil {
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tun.log.Errorf("Windows netsh failed: %v.", err)
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tun.log.Traceln(string(output))
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return err
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}
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// Get a new iface
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iface, err = water.New(config)
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if err != nil {
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panic(err)
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}
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tun.iface = iface
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tun.mtu = getSupportedMTU(mtu)
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err = tun.setupMTU(tun.mtu)
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if err != nil {
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panic(err)
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}
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// Friendly output
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tun.log.Infof("Interface name: %s", tun.iface.Name())
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tun.log.Infof("Interface IPv6: %s", addr)
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tun.log.Infof("Interface MTU: %d", tun.mtu)
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return tun.setupAddress(addr)
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}
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// Sets the MTU of the TAP adapter.
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func (tun *TunAdapter) setupMTU(mtu int) error {
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// Set MTU
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cmd := exec.Command("netsh", "interface", "ipv6", "set", "subinterface",
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fmt.Sprintf("interface=%s", tun.iface.Name()),
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fmt.Sprintf("mtu=%d", mtu),
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"store=active")
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tun.log.Debugln("netsh command: %v", strings.Join(cmd.Args, " "))
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output, err := cmd.CombinedOutput()
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if err != nil {
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tun.log.Errorf("Windows netsh failed: %v.", err)
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tun.log.Traceln(string(output))
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return err
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}
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return nil
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}
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// Sets the IPv6 address of the TAP adapter.
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func (tun *TunAdapter) setupAddress(addr string) error {
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// Set address
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cmd := exec.Command("netsh", "interface", "ipv6", "add", "address",
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fmt.Sprintf("interface=%s", tun.iface.Name()),
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fmt.Sprintf("addr=%s", addr),
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"store=active")
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tun.log.Debugln("netsh command: %v", strings.Join(cmd.Args, " "))
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output, err := cmd.CombinedOutput()
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if err != nil {
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tun.log.Errorf("Windows netsh failed: %v.", err)
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tun.log.Traceln(string(output))
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return err
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}
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return nil
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}
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