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https://github.com/cwinfo/yggdrasil-go.git
synced 2024-11-26 03:41:37 +00:00
Set interface flags properly on OpenBSD
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9e4d169208
commit
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@ -2,6 +2,7 @@ package yggdrasil
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// This manages the tun driver to send/recv packets to/from applications
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import "os"
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import ethernet "github.com/songgao/packets/ethernet"
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const IPv6_HEADER_LENGTH = 40
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@ -14,6 +15,7 @@ type tunInterface interface {
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Read(to []byte) (int, error)
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Write(from []byte) (int, error)
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Close() error
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FD() *os.File
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}
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type tunDevice struct {
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@ -2,16 +2,18 @@
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package yggdrasil
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import "fmt"
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import "os/exec"
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import "strings"
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import "unsafe"
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import "syscall"
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import "golang.org/x/sys/unix"
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import water "github.com/neilalexander/water"
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// This is to catch BSD platforms
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const TUNSIFINFO = (0x80000000) | ((4 & 0x1fff) << 16) | uint32(byte('t'))<<8 | 91
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const TUNGIFINFO = (0x40000000) | ((4 & 0x1fff) << 16) | uint32(byte('t'))<<8 | 92
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const TUNSIFINFO = (0x80000000) | ((12 & 0x1fff) << 16) | uint32(byte('t'))<<8 | 91
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const TUNGIFINFO = (0x40000000) | ((12 & 0x1fff) << 16) | uint32(byte('t'))<<8 | 92
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const SIOCAIFADDR_IN6 = (0x80000000) | ((4 & 0x1fff) << 16) | uint32(byte('i'))<<8 | 27
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type in6_addrlifetime struct {
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@ -40,10 +42,10 @@ type in6_aliasreq struct {
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}
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type tuninfo struct {
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tun_baudrate int
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tun_mtu int16
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tun_type uint8
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tun_dummy uint8
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tun_mtu uint16
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tun_type uint32
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tun_flags uint32
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tun_dummy uint16
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}
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func (tun *tunDevice) setup(ifname string, iftapmode bool, addr string, mtu int) error {
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@ -67,23 +69,46 @@ func (tun *tunDevice) setup(ifname string, iftapmode bool, addr string, mtu int)
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}
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func (tun *tunDevice) setupAddress(addr string) error {
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fd := tun.iface.FD().Fd()
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var err error
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var ti tuninfo
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// Get the existing interface flags
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if _, _, errno := unix.Syscall(unix.SYS_IOCTL, uintptr(fd), uintptr(TUNGIFINFO), uintptr(unsafe.Pointer(&ti))); errno != 0 {
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err = errno
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tun.core.log.Printf("Error in TUNGIFINFO: %v", errno)
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return err
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}
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tun.core.log.Printf("TUNGIFINFO: %+v", ti)
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// Set the new MTU
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ti.tun_mtu = uint16(tun.mtu)
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// Set the new interface flags
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ti.tun_flags |= syscall.IFF_UP
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switch {
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case tun.iface.IsTAP():
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ti.tun_flags |= syscall.IFF_MULTICAST
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ti.tun_flags |= syscall.IFF_BROADCAST
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case tun.iface.IsTUN():
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ti.tun_flags |= syscall.IFF_POINTOPOINT
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}
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// Set the new interface flags
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tun.core.log.Printf("TUNSIFINFO: %+v", ti)
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if _, _, errno := unix.Syscall(unix.SYS_IOCTL, uintptr(fd), uintptr(TUNSIFINFO), uintptr(unsafe.Pointer(&ti))); errno != 0 {
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err = errno
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tun.core.log.Printf("Error in TUNSIFINFO: %v", errno)
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return err
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}
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// Set address
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cmd := exec.Command("ifconfig", tun.iface.Name(), "inet6", addr)
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tun.core.log.Printf("ifconfig command: %v", strings.Join(cmd.Args, " "))
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output, err := cmd.CombinedOutput()
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if err != nil {
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tun.core.log.Printf("ipconfig failed: %v.", err)
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tun.core.log.Printf("ifconfig failed: %v.", err)
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tun.core.log.Println(string(output))
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return err
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}
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// Set MTU and bring device up
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cmd = exec.Command("ifconfig", tun.iface.Name(), "mtu", fmt.Sprintf("%d", tun.mtu), "up")
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tun.core.log.Printf("ifconfig command: %v", strings.Join(cmd.Args, " "))
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output, err = cmd.CombinedOutput()
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if err != nil {
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tun.core.log.Printf("ipconfig failed: %v.", err)
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tun.core.log.Println(string(output))
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return err
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}
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return nil
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