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Take a fd

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Former-commit-id: 84694395c9
This commit is contained in:
Owen
2025-11-15 20:09:00 -05:00
parent e6cf631dbc
commit 75890ca5a6
2 changed files with 9 additions and 13 deletions
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10
olm/olm.go
View File

@@ -56,6 +56,8 @@ type Config struct {
Version string
OrgID string
// DoNotCreateNewClient bool
FileDescriptorTun uint32
}
var (
@@ -366,16 +368,16 @@ func TunnelProcess(ctx context.Context, config Config, id string, secret string,
}
tdev, err = func() (tun.Device, error) {
if runtime.GOOS == "darwin" {
if config.FileDescriptorTun != 0 {
return createTUNFromFD(config.FileDescriptorTun, config.MTU)
}
if runtime.GOOS == "darwin" { // this is if we dont pass a fd
interfaceName, err := findUnusedUTUN()
if err != nil {
return nil, err
}
return tun.CreateTUN(interfaceName, config.MTU)
}
if tunFdStr := os.Getenv(ENV_WG_TUN_FD); tunFdStr != "" {
return createTUNFromFD(tunFdStr, config.MTU)
}
return tun.CreateTUN(interfaceName, config.MTU)
}()

12
olm/unix.go
View File

@@ -5,25 +5,19 @@ package olm
import (
"net"
"os"
"strconv"
"golang.org/x/sys/unix"
"golang.zx2c4.com/wireguard/ipc"
"golang.zx2c4.com/wireguard/tun"
)
func createTUNFromFD(tunFdStr string, mtuInt int) (tun.Device, error) {
fd, err := strconv.ParseUint(tunFdStr, 10, 32)
func createTUNFromFD(tunFd uint32, mtuInt int) (tun.Device, error) {
err := unix.SetNonblock(int(tunFd), true)
if err != nil {
return nil, err
}
err = unix.SetNonblock(int(fd), true)
if err != nil {
return nil, err
}
file := os.NewFile(uintptr(fd), "")
file := os.NewFile(uintptr(tunFd), "")
return tun.CreateTUNFromFile(file, mtuInt)
}
func uapiOpen(interfaceName string) (*os.File, error) {