53 lines
1.2 KiB
Go
53 lines
1.2 KiB
Go
package tun
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import (
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"fmt"
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"os/exec"
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"github.com/songgao/water"
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)
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// New creates and returns a new TUN interface for the application.
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func New(name string) (result *water.Interface, err error) {
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// Setup TUN Config
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cfg := water.Config{
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DeviceType: water.TUN,
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}
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cfg.Name = name
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// Create TUN Interface
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result, err = water.New(cfg)
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return
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}
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// SetMTU sets the Maximum Tansmission Unit Size for a
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// Packet on the interface.
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func SetMTU(name string, mtu int) (err error) {
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return ip("link", "set", "dev", name, "mtu", fmt.Sprintf("%d", mtu))
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}
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// SetAddress sets the interface's known address and subnet.
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func SetAddress(name string, address string) (err error) {
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return ip("addr", "add", address, "dev", name)
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}
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// Up brings up an interface to allow it to start accepting connections.
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func Up(name string) (err error) {
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return ip("link", "set", "dev", name, "up")
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}
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// Down brings down an interface stopping active connections.
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func Down(name string) (err error) {
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return ip("link", "set", "dev", name, "down")
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}
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// Delete removes a TUN device from the host.
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func Delete(name string) (err error) {
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return ip("link", "delete", "dev", name)
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}
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func ip(args ...string) (err error) {
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cmd := exec.Command("/sbin/ip", args...)
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err = cmd.Run()
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return
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}
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