73 lines
1.5 KiB
Go
73 lines
1.5 KiB
Go
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//go:build darwin
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// +build darwin
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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, opts ...Option) (*TUN, 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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// Create Water Interface
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iface, err := water.New(cfg)
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if err != nil {
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return nil, err
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}
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// Create TUN result struct
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result := TUN{
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Iface: iface,
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}
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// Apply options to set TUN config values
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err = result.Apply(opts...)
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return &result, err
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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 (t *TUN) setMTU(mtu int) error {
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return ifconfig(t.Iface.Name(), "mtu", fmt.Sprintf("%d", mtu))
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}
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// SetDestAddress sets the interface's address.
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func (t *TUN) setAddress(address string) error {
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t.Src = address
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return nil
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}
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// SetDestAddress sets the interface's address.
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func (t *TUN) setDestAddress(address string) error {
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t.Dst = address
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return nil
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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 (t *TUN) Up() error {
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return ifconfig(t.Iface.Name(), "inet", t.Src, t.Dst, "up")
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}
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// Down brings down an interface stopping active connections.
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func (t *TUN) Down() error {
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return ifconfig(t.Iface.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) error {
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return fmt.Errorf("removing an interface is unsupported under mac")
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}
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func ifconfig(args ...string) error {
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cmd := exec.Command("ifconfig", args...)
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return cmd.Run()
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}
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