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Copy pathtuntap_unix.go
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Copy pathtuntap_unix.go
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132 lines (113 loc) · 2.59 KB
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// +build !linux,!windows,!darwin
package gost
import (
"fmt"
"net"
"os/exec"
"strings"
"github.com/go-log/log"
"github.com/songgao/water"
)
func createTun(cfg TunConfig) (conn net.Conn, itf *net.Interface, err error) {
ip, _, err := net.ParseCIDR(cfg.Addr)
if err != nil {
return
}
ifce, err := water.New(water.Config{
DeviceType: water.TUN,
})
if err != nil {
return
}
mtu := cfg.MTU
if mtu <= 0 {
mtu = DefaultMTU
}
cmd := fmt.Sprintf("ifconfig %s inet %s mtu %d up", ifce.Name(), cfg.Addr, mtu)
log.Log("[tun]", cmd)
args := strings.Split(cmd, " ")
if er := exec.Command(args[0], args[1:]...).Run(); er != nil {
err = fmt.Errorf("%s: %v", cmd, er)
return
}
if err = addTunRoutes(ifce.Name(), cfg.Routes...); err != nil {
return
}
itf, err = net.InterfaceByName(ifce.Name())
if err != nil {
return
}
conn = &tunTapConn{
ifce: ifce,
addr: &net.IPAddr{IP: ip},
}
return
}
func createTap(cfg TapConfig) (conn net.Conn, itf *net.Interface, err error) {
ip, _, _ := net.ParseCIDR(cfg.Addr)
ifce, err := water.New(water.Config{
DeviceType: water.TAP,
})
if err != nil {
return
}
mtu := cfg.MTU
if mtu <= 0 {
mtu = DefaultMTU
}
var cmd string
if cfg.Addr != "" {
cmd = fmt.Sprintf("ifconfig %s inet %s mtu %d up", ifce.Name(), cfg.Addr, mtu)
} else {
cmd = fmt.Sprintf("ifconfig %s mtu %d up", ifce.Name(), mtu)
}
log.Log("[tap]", cmd)
args := strings.Split(cmd, " ")
if er := exec.Command(args[0], args[1:]...).Run(); er != nil {
err = fmt.Errorf("%s: %v", cmd, er)
return
}
if err = addTapRoutes(ifce.Name(), cfg.Gateway, cfg.Routes...); err != nil {
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}
itf, err = net.InterfaceByName(ifce.Name())
if err != nil {
return
}
conn = &tunTapConn{
ifce: ifce,
addr: &net.IPAddr{IP: ip},
}
return
}
func addTunRoutes(ifName string, routes ...IPRoute) error {
for _, route := range routes {
if route.Dest == nil {
continue
}
cmd := fmt.Sprintf("route add -net %s -interface %s", route.Dest.String(), ifName)
log.Logf("[tun] %s", cmd)
args := strings.Split(cmd, " ")
if er := exec.Command(args[0], args[1:]...).Run(); er != nil {
return fmt.Errorf("%s: %v", cmd, er)
}
}
return nil
}
func addTapRoutes(ifName string, gw string, routes ...string) error {
for _, route := range routes {
if route == "" {
continue
}
cmd := fmt.Sprintf("route add -net %s dev %s", route, ifName)
if gw != "" {
cmd += " gw " + gw
}
log.Logf("[tap] %s", cmd)
args := strings.Split(cmd, " ")
if er := exec.Command(args[0], args[1:]...).Run(); er != nil {
return fmt.Errorf("%s: %v", cmd, er)
}
}
return nil
}