91 lines
2.1 KiB
Go
91 lines
2.1 KiB
Go
package nebula
|
|
|
|
import (
|
|
"fmt"
|
|
"net"
|
|
"os/exec"
|
|
"strconv"
|
|
|
|
"github.com/songgao/water"
|
|
)
|
|
|
|
type Tun struct {
|
|
Device string
|
|
Cidr *net.IPNet
|
|
MTU int
|
|
UnsafeRoutes []route
|
|
|
|
*water.Interface
|
|
}
|
|
|
|
func newTun(deviceName string, cidr *net.IPNet, defaultMTU int, routes []route, unsafeRoutes []route, txQueueLen int) (ifce *Tun, err error) {
|
|
if len(routes) > 0 {
|
|
return nil, fmt.Errorf("Route MTU not supported in Windows")
|
|
}
|
|
|
|
// NOTE: You cannot set the deviceName under Windows, so you must check tun.Device after calling .Activate()
|
|
return &Tun{
|
|
Cidr: cidr,
|
|
MTU: defaultMTU,
|
|
UnsafeRoutes: unsafeRoutes,
|
|
}, nil
|
|
}
|
|
|
|
func (c *Tun) Activate() error {
|
|
var err error
|
|
c.Interface, err = water.New(water.Config{
|
|
DeviceType: water.TUN,
|
|
PlatformSpecificParams: water.PlatformSpecificParams{
|
|
ComponentID: "tap0901",
|
|
Network: c.Cidr.String(),
|
|
},
|
|
})
|
|
if err != nil {
|
|
return fmt.Errorf("Activate failed: %v", err)
|
|
}
|
|
|
|
c.Device = c.Interface.Name()
|
|
|
|
// TODO use syscalls instead of exec.Command
|
|
err = exec.Command(
|
|
`C:\Windows\System32\netsh.exe`, "interface", "ipv4", "set", "address",
|
|
fmt.Sprintf("name=%s", c.Device),
|
|
"source=static",
|
|
fmt.Sprintf("addr=%s", c.Cidr.IP),
|
|
fmt.Sprintf("mask=%s", net.IP(c.Cidr.Mask)),
|
|
"gateway=none",
|
|
).Run()
|
|
if err != nil {
|
|
return fmt.Errorf("failed to run 'netsh' to set address: %s", err)
|
|
}
|
|
err = exec.Command(
|
|
`C:\Windows\System32\netsh.exe`, "interface", "ipv4", "set", "interface",
|
|
c.Device,
|
|
fmt.Sprintf("mtu=%d", c.MTU),
|
|
).Run()
|
|
if err != nil {
|
|
return fmt.Errorf("failed to run 'netsh' to set MTU: %s", err)
|
|
}
|
|
|
|
iface, err := net.InterfaceByName(c.Device)
|
|
if err != nil {
|
|
return fmt.Errorf("failed to find interface named %s: %v", c.Device, err)
|
|
}
|
|
|
|
for _, r := range c.UnsafeRoutes {
|
|
err = exec.Command(
|
|
"C:\\Windows\\System32\\route.exe", "add", r.route.String(), r.via.String(), "IF", strconv.Itoa(iface.Index),
|
|
).Run()
|
|
if err != nil {
|
|
return fmt.Errorf("failed to add the unsafe_route %s: %v", r.route.String(), err)
|
|
}
|
|
}
|
|
|
|
return nil
|
|
}
|
|
|
|
func (c *Tun) WriteRaw(b []byte) error {
|
|
_, err := c.Write(b)
|
|
return err
|
|
}
|