mahasona/clash
1
0
Fork 0
mirror of https://github.com/MetaCubeX/mihomo.git synced 2024-06-30 18:09:58 +00:00
Code Issues Packages Projects Releases Wiki Activity

[Fixed] Configure tun interface on linux

Browse source
This commit is contained in:
Skyxim 2021-12-11 22:34:45 +08:00
parent 9e44e21406
commit 69aef9cec0
1 changed files with 78 additions and 1 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

79
listener/tun/dev/dev_linux.go
View file

@ -11,6 +11,7 @@ import (
"os"
"os/exec"
"strconv"
"strings"
"sync"
"syscall"
"unsafe"
@ -54,6 +55,12 @@ func OpenTunDevice(tunAddress string, autoRoute bool) (TunDevice, error) {
if err != nil {
return nil, err
}
err = t.configInterface()
if err != nil {
return nil, err
}
if autoRoute {
SetLinuxAutoRoute()
}
@ -128,7 +135,9 @@ func (t *tunLinux) openDeviceByName(name string) (TunDevice, error) {
if len(nameBytes) >= unix.IFNAMSIZ {
return nil, errors.New("interface name too long")
}
copy(ifr[:], nameBytes)
*(*uint16)(unsafe.Pointer(&ifr[unix.IFNAMSIZ])) = flags
_, _, errno := unix.Syscall(
@ -140,11 +149,11 @@ func (t *tunLinux) openDeviceByName(name string) (TunDevice, error) {
if errno != 0 {
return nil, errno
}
err = unix.SetNonblock(nfd, true)
if err != nil {
return nil, err
}
// Note that the above -- open,ioctl,nonblock -- must happen prior to handing it to netpoll as below this line.
t.tunFile = os.NewFile(uintptr(nfd), cloneDevicePath)
@ -157,6 +166,74 @@ func (t *tunLinux) openDeviceByName(name string) (TunDevice, error) {
return t, nil
}
func (t *tunLinux) configInterface() error {
var ifr [ifReqSize]byte
nameBytes := []byte(t.name)
if len(nameBytes) >= unix.IFNAMSIZ {
return errors.New("interface name too long")
}
copy(ifr[:], nameBytes)
fd, _, errno := syscall.Syscall(unix.SYS_SOCKET, unix.AF_INET, unix.SOCK_STREAM, 0)
if errno != 0 {
return errno
}
// set addr for tun
var ip []byte
for _, num := range strings.Split(t.tunAddress, ".") {
value, err := strconv.Atoi(num)
if err != nil {
return err
}
ip = append(ip, byte(value))
}
*(*uint16)(unsafe.Pointer(&ifr[unix.IFNAMSIZ])) = uint16(unix.AF_INET)
copy(ifr[unix.IFNAMSIZ+4:], ip)
_, _, errno = unix.Syscall(
unix.SYS_IOCTL,
fd,
uintptr(unix.SIOCSIFADDR),
uintptr(unsafe.Pointer(&ifr[0])))
if errno != 0 {
return errno
}
// set netmask for tun
netmask := []byte{255, 255, 255, 0}
copy(ifr[unix.IFNAMSIZ+4:], netmask)
_, _, errno = unix.Syscall(
unix.SYS_IOCTL,
fd,
uintptr(unix.SIOCSIFNETMASK),
uintptr(unsafe.Pointer(&ifr[0])))
if errno != 0 {
return errno
}
// interface up
_, _, errno = syscall.Syscall(unix.SYS_IOCTL, fd, uintptr(unix.SIOCSIFFLAGS), uintptr(unsafe.Pointer(&ifr[0])))
var flags = uint16(unix.IFF_UP | unix.IFF_TUN | unix.IFF_MULTICAST | unix.IFF_RUNNING | unix.IFF_NOARP)
*(*uint16)(unsafe.Pointer(&ifr[unix.IFNAMSIZ])) = flags
_, _, errno = syscall.Syscall(
unix.SYS_IOCTL,
fd,
uintptr(unix.SIOCSIFFLAGS),
uintptr(unsafe.Pointer(&ifr[0])))
if errno != 0 {
return errno
}
return nil
}
func (t *tunLinux) openDeviceByFd(fd int) (TunDevice, error) {
var ifr struct {
name [16]byte