mirror of
https://git.zx2c4.com/wireguard-go
synced 2024-11-14 16:55:15 +01:00
code quality:
- main.go: un-export local constants - main.go: use camelcase instead of snake case where possible - main.go: ignore unhandled exception explicitly - main.go: avoid local variable names that collide with imported package names Signed-off-by: Frank Werner-Krippendorf <mail@hb9fxq.ch>
This commit is contained in:
Frank Werner-Krippendorf
parent
b84f1d4db2
commit
a0dac367e1
84
main.go
84
main.go
@ -20,15 +20,12 @@ import (
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"golang.zx2c4.com/wireguard/tun"
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)
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const (
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ExitSetupSuccess = 0
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ExitSetupFailed = 1
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)
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const exitCodeSetupFailed = 1
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const (
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ENV_WG_TUN_FD = "WG_TUN_FD"
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ENV_WG_UAPI_FD = "WG_UAPI_FD"
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ENV_WG_PROCESS_FOREGROUND = "WG_PROCESS_FOREGROUND"
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envWgTunFd = "WG_TUN_FD"
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envWgUapiFd = "WG_UAPI_FD"
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envWgProcessForeground = "WG_PROCESS_FOREGROUND"
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)
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func printUsage() {
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@ -37,20 +34,20 @@ func printUsage() {
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}
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func warning() {
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if runtime.GOOS != "linux" || os.Getenv(ENV_WG_PROCESS_FOREGROUND) == "1" {
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if runtime.GOOS != "linux" || os.Getenv(envWgProcessForeground) == "1" {
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return
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}
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fmt.Fprintln(os.Stderr, "┌───────────────────────────────────────────────────┐")
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fmt.Fprintln(os.Stderr, "│ │")
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fmt.Fprintln(os.Stderr, "│ Running this software on Linux is unnecessary, │")
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fmt.Fprintln(os.Stderr, "│ because the Linux kernel has built-in first │")
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fmt.Fprintln(os.Stderr, "│ class support for WireGuard, which will be │")
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fmt.Fprintln(os.Stderr, "│ faster, slicker, and better integrated. For │")
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fmt.Fprintln(os.Stderr, "│ information on installing the kernel module, │")
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fmt.Fprintln(os.Stderr, "│ please visit: <https://wireguard.com/install>. │")
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fmt.Fprintln(os.Stderr, "│ │")
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fmt.Fprintln(os.Stderr, "└───────────────────────────────────────────────────┘")
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_, _ = fmt.Fprintln(os.Stderr, "┌───────────────────────────────────────────────────┐")
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_, _ = fmt.Fprintln(os.Stderr, "│ │")
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_, _ = fmt.Fprintln(os.Stderr, "│ Running this software on Linux is unnecessary, │")
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_, _ = fmt.Fprintln(os.Stderr, "│ because the Linux kernel has built-in first │")
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_, _ = fmt.Fprintln(os.Stderr, "│ class support for WireGuard, which will be │")
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_, _ = fmt.Fprintln(os.Stderr, "│ faster, slicker, and better integrated. For │")
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_, _ = fmt.Fprintln(os.Stderr, "│ information on installing the kernel module, │")
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_, _ = fmt.Fprintln(os.Stderr, "│ please visit: <https://wireguard.com/install>. │")
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_, _ = fmt.Fprintln(os.Stderr, "│ │")
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_, _ = fmt.Fprintln(os.Stderr, "└───────────────────────────────────────────────────┘")
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}
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func main() {
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@ -88,7 +85,7 @@ func main() {
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}
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if !foreground {
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foreground = os.Getenv(ENV_WG_PROCESS_FOREGROUND) == "1"
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foreground = os.Getenv(envWgProcessForeground) == "1"
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}
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// get log level (default: info)
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@ -109,8 +106,8 @@ func main() {
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// open TUN device (or use supplied fd)
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tun, err := func() (tun.Device, error) {
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tunFdStr := os.Getenv(ENV_WG_TUN_FD)
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tunDevice, err := func() (tun.Device, error) {
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tunFdStr := os.Getenv(envWgTunFd)
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if tunFdStr == "" {
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return tun.CreateTUN(interfaceName, device.DefaultMTU)
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}
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@ -132,7 +129,7 @@ func main() {
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}()
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if err == nil {
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realInterfaceName, err2 := tun.Name()
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realInterfaceName, err2 := tunDevice.Name()
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if err2 == nil {
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interfaceName = realInterfaceName
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}
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@ -149,13 +146,13 @@ func main() {
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if err != nil {
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logger.Error.Println("Failed to create TUN device:", err)
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os.Exit(ExitSetupFailed)
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os.Exit(exitCodeSetupFailed)
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}
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// open UAPI file (or use supplied fd)
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fileUAPI, err := func() (*os.File, error) {
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uapiFdStr := os.Getenv(ENV_WG_UAPI_FD)
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uapiFdStr := os.Getenv(envWgUapiFd)
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if uapiFdStr == "" {
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return ipc.UAPIOpen(interfaceName)
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}
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@ -172,16 +169,16 @@ func main() {
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if err != nil {
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logger.Error.Println("UAPI listen error:", err)
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os.Exit(ExitSetupFailed)
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os.Exit(exitCodeSetupFailed)
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return
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}
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// daemonize the process
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if !foreground {
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env := os.Environ()
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env = append(env, fmt.Sprintf("%s=3", ENV_WG_TUN_FD))
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env = append(env, fmt.Sprintf("%s=4", ENV_WG_UAPI_FD))
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env = append(env, fmt.Sprintf("%s=1", ENV_WG_PROCESS_FOREGROUND))
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env = append(env, fmt.Sprintf("%s=3", envWgTunFd))
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env = append(env, fmt.Sprintf("%s=4", envWgUapiFd))
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env = append(env, fmt.Sprintf("%s=1", envWgProcessForeground))
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files := [3]*os.File{}
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if os.Getenv("LOG_LEVEL") != "" && logLevel != device.LogLevelSilent {
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files[0], _ = os.Open(os.DevNull)
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@ -197,7 +194,7 @@ func main() {
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files[0], // stdin
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files[1], // stdout
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files[2], // stderr
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tun.File(),
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tunDevice.File(),
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fileUAPI,
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},
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Dir: ".",
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@ -207,7 +204,7 @@ func main() {
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path, err := os.Executable()
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if err != nil {
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logger.Error.Println("Failed to determine executable:", err)
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os.Exit(ExitSetupFailed)
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os.Exit(exitCodeSetupFailed)
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}
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process, err := os.StartProcess(
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@ -217,13 +214,19 @@ func main() {
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)
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if err != nil {
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logger.Error.Println("Failed to daemonize:", err)
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os.Exit(ExitSetupFailed)
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os.Exit(exitCodeSetupFailed)
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}
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process.Release()
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err = process.Release()
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if err != nil {
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logger.Error.Println("Failed to release process:", err)
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}
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return
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}
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device := device.NewDevice(tun, logger)
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dev := device.NewDevice(tunDevice, logger)
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logger.Info.Println("Device started")
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@ -233,7 +236,7 @@ func main() {
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uapi, err := ipc.UAPIListen(interfaceName, fileUAPI)
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if err != nil {
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logger.Error.Println("Failed to listen on uapi socket:", err)
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os.Exit(ExitSetupFailed)
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os.Exit(exitCodeSetupFailed)
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}
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go func() {
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@ -243,7 +246,7 @@ func main() {
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errs <- err
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return
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}
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go device.IpcHandle(conn)
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go dev.IpcHandle(conn)
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}
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}()
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@ -257,13 +260,18 @@ func main() {
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select {
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case <-term:
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case <-errs:
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case <-device.Wait():
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case <-dev.Wait():
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}
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// clean up
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uapi.Close()
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device.Close()
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err = uapi.Close()
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if err != nil {
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logger.Info.Println("Failed to close UAPI listener", err)
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}
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dev.Close()
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logger.Info.Println("Shutting down")
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}
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