tun: support IPv6

go.mod

@@ -33,7 +33,6 @@ require (
 	github.com/ryanuber/go-glob v0.0.0-20170128012129-256dc444b735
 	github.com/shadowsocks/go-shadowsocks2 v0.0.11
 	github.com/shadowsocks/shadowsocks-go v0.0.0-20170121203516-97a5c71f80ba
-	github.com/songgao/packets v0.0.0-20160404182456-549a10cd4091
 	github.com/songgao/water v0.0.0-20190725173103-fd331bda3f4b
 	github.com/templexxx/cpufeat v0.0.0-20180724012125-cef66df7f161 // indirect
 	github.com/templexxx/xor v0.0.0-20181023030647-4e92f724b73b // indirect

go.sum

@@ -69,8 +69,6 @@ github.com/shadowsocks/go-shadowsocks2 v0.0.11 h1:dXloqEhYnZV40jblWTK8kWeC0Eb+dg
 github.com/shadowsocks/go-shadowsocks2 v0.0.11/go.mod h1:R+KWaoIwRRhnpw6XV+dZil0XHi64Hc1D7hXUyXTjUzQ=
 github.com/shadowsocks/shadowsocks-go v0.0.0-20170121203516-97a5c71f80ba h1:tJgNXb3S+RkB4kNPi6N5OmEWe3m+Y3Qs6LUMiNDAONM=
 github.com/shadowsocks/shadowsocks-go v0.0.0-20170121203516-97a5c71f80ba/go.mod h1:mttDPaeLm87u74HMrP+n2tugXvIKWcwff/cqSX0lehY=
-github.com/songgao/packets v0.0.0-20160404182456-549a10cd4091 h1:1zN6ImoqhSJhN8hGXFaJlSC8msLmIbX8bFqOfWLKw0w=
-github.com/songgao/packets v0.0.0-20160404182456-549a10cd4091/go.mod h1:N20Z5Y8oye9a7HmytmZ+tr8Q2vlP0tAHP13kTHzwvQY=
 github.com/songgao/water v0.0.0-20190725173103-fd331bda3f4b h1:+y4hCMc/WKsDbAPsOQZgBSaSZ26uh2afyaWeVg/3s/c=
 github.com/songgao/water v0.0.0-20190725173103-fd331bda3f4b/go.mod h1:P5HUIBuIWKbyjl083/loAegFkfbFNx5i2qEP4CNbm7E=
 github.com/templexxx/cpufeat v0.0.0-20180724012125-cef66df7f161 h1:89CEmDvlq/F7SJEOqkIdNDGJXrQIhuIx9D2DBXjavSU=

tuntap_darwin.go

@@ -11,8 +11,8 @@ import (
 	"github.com/songgao/water"
 )
 
-func createTun(cfg TunConfig) (conn net.Conn, ipNet *net.IPNet, err error) {
-	ip, ipNet, err := net.ParseCIDR(cfg.Addr)
+func createTun(cfg TunConfig) (conn net.Conn, itf *net.Interface, err error) {
+	ip, _, err := net.ParseCIDR(cfg.Addr)
 	if err != nil {
 		return
 	}
@@ -41,6 +41,11 @@ func createTun(cfg TunConfig) (conn net.Conn, ipNet *net.IPNet, err error) {
 		return
 	}
 
+	itf, err = net.InterfaceByName(ifce.Name())
+	if err != nil {
+		return
+	}
+
 	conn = &tunTapConn{
 		ifce: ifce,
 		addr: &net.IPAddr{IP: ip},

tuntap_linux.go

@@ -10,7 +10,7 @@ import (
 	"github.com/songgao/water"
 )
 
-func createTun(cfg TunConfig) (conn net.Conn, ipNet *net.IPNet, err error) {
+func createTun(cfg TunConfig) (conn net.Conn, itf *net.Interface, err error) {
 	ip, ipNet, err := net.ParseCIDR(cfg.Addr)
 	if err != nil {
 		return
@@ -61,6 +61,11 @@ func createTun(cfg TunConfig) (conn net.Conn, ipNet *net.IPNet, err error) {
 		return
 	}
 
+	itf, err = net.InterfaceByName(ifce.Name())
+	if err != nil {
+		return
+	}
+
 	conn = &tunTapConn{
 		ifce: ifce,
 		addr: &net.IPAddr{IP: ip},

tuntap_unix.go

@@ -12,8 +12,8 @@ import (
 	"github.com/songgao/water"
 )
 
-func createTun(cfg TunConfig) (conn net.Conn, ipNet *net.IPNet, err error) {
-	ip, ipNet, err := net.ParseCIDR(cfg.Addr)
+func createTun(cfg TunConfig) (conn net.Conn, itf *net.Interface, err error) {
+	ip, _, err := net.ParseCIDR(cfg.Addr)
 	if err != nil {
 		return
 	}
@@ -42,6 +42,11 @@ func createTun(cfg TunConfig) (conn net.Conn, ipNet *net.IPNet, err error) {
 		return
 	}
 
+	itf, err = net.InterfaceByName(ifce.Name())
+	if err != nil {
+		return
+	}
+
 	conn = &tunTapConn{
 		ifce: ifce,
 		addr: &net.IPAddr{IP: ip},

tuntap_windows.go

@@ -10,7 +10,7 @@ import (
 	"github.com/songgao/water"
 )
 
-func createTun(cfg TunConfig) (conn net.Conn, ipNet *net.IPNet, err error) {
+func createTun(cfg TunConfig) (conn net.Conn, itf *net.Interface, err error) {
 	ip, ipNet, err := net.ParseCIDR(cfg.Addr)
 	if err != nil {
 		return
@@ -42,6 +42,11 @@ func createTun(cfg TunConfig) (conn net.Conn, ipNet *net.IPNet, err error) {
 		return
 	}
 
+	itf, err = net.InterfaceByName(ifce.Name())
+	if err != nil {
+		return
+	}
+
 	conn = &tunTapConn{
 		ifce: ifce,
 		addr: &net.IPAddr{IP: ip},