From d597ee5f835e4e71c2a1a711eb4d0cf8705d36c4 Mon Sep 17 00:00:00 2001
From: Christian Pointner <equinox@anytun.org>
Date: Sun, 13 Aug 2017 22:27:35 +0200
Subject: basic interface configuration works now

---
 tuntap/tuntap.go | 34 +++++++++++++++++++++++++++++-----
 1 file changed, 29 insertions(+), 5 deletions(-)

(limited to 'tuntap')

diff --git a/tuntap/tuntap.go b/tuntap/tuntap.go
index 27fd2b1..6c27171 100644
--- a/tuntap/tuntap.go
+++ b/tuntap/tuntap.go
@@ -32,22 +32,44 @@ package tuntap
 
 import (
 	"fmt"
+	"net"
 	"strings"
 
 	extlib "github.com/lab11/go-tuntap/tuntap"
+	"github.com/vishvananda/netlink"
 )
 
 type Device struct {
 	iface  *extlib.Interface
 	iftype extlib.DevKind
+	ifname string
 }
 
-func (dev *Device) Configure(ip_mask string, postup string) error {
-	fmt.Printf("running: ip link set up dev %s\n", dev.iface.Name())
-	fmt.Printf("running: ip addr add dev %s %s\n", dev.iface.Name(), ip_mask)
-	if postup != "" {
-		fmt.Printf("running: %s %s\n", postup, dev.iface.Name())
+func (dev *Device) Name() string {
+	return dev.ifname
+}
+
+func (dev *Device) Configure(addr net.IPNet) error {
+	// TODO: this only works on linux...
+	ln, err := netlink.LinkByName(dev.ifname)
+	if err != nil {
+		return fmt.Errorf("netlink(open netlink by name) failed: %v", dev.ifname, err)
+	}
+	if err = netlink.AddrAdd(ln, &netlink.Addr{IPNet: &addr}); err != nil {
+		return fmt.Errorf("netlink(addr add) failed: %v", err)
+	}
+	if err = netlink.LinkSetMTU(ln, 1400); err != nil { // TODO: hardcoded value
+		return fmt.Errorf("netlink(link set mtu) failed: %v", err)
 	}
+	if err = netlink.LinkSetUp(ln); err != nil {
+		return fmt.Errorf("netlink(link set up) failed: %v", err)
+	}
+	return nil
+}
+
+func (dev *Device) RunPostUp(script string) error {
+	// TODO: implement this
+	fmt.Printf("running: %s %s\n", script, dev.iface.Name())
 	return nil
 }
 
@@ -69,6 +91,7 @@ func NewTunDevice(name string) (dev *Device, err error) {
 	if dev.iface, err = extlib.Open(name, extlib.DevTun, true); err != nil {
 		return
 	}
+	dev.ifname = strings.TrimRight(dev.iface.Name(), "\x00") // TODO: fix this upstream
 	return
 }
 
@@ -77,6 +100,7 @@ func NewTapDevice(name string) (dev *Device, err error) {
 	if dev.iface, err = extlib.Open(name, extlib.DevTap, false); err != nil {
 		return
 	}
+	dev.ifname = strings.TrimRight(dev.iface.Name(), "\x00") // TODO: fix this upstream
 	return
 }
 
-- 
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