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package main
import (
"flag"
"fmt"
"os"
"os/signal"
"syscall"
"go.uber.org/automaxprocs/maxprocs"
"gopkg.in/yaml.v3"
_ "github.com/xjasonlyu/tun2socks/v2/dns"
"github.com/xjasonlyu/tun2socks/v2/engine"
"github.com/xjasonlyu/tun2socks/v2/internal/version"
"github.com/xjasonlyu/tun2socks/v2/log"
)
var (
key = new(engine.Key)
configFile string
versionFlag bool
)
func init() {
flag.IntVar(&key.Mark, "fwmark", 0, "Set firewall MARK (Linux only)")
flag.IntVar(&key.MTU, "mtu", 0, "Set device maximum transmission unit (MTU)")
flag.DurationVar(&key.UDPTimeout, "udp-timeout", 0, "Set timeout for each UDP session")
flag.StringVar(&configFile, "config", "", "YAML format configuration file")
flag.StringVar(&key.Device, "device", "", "Use this device [driver://]name")
flag.StringVar(&key.Interface, "interface", "", "Use network INTERFACE (Linux/MacOS only)")
flag.StringVar(&key.LogLevel, "loglevel", "info", "Log level [debug|info|warn|error|silent]")
flag.StringVar(&key.Proxy, "proxy", "", "Use this proxy [protocol://]host[:port]")
flag.StringVar(&key.RestAPI, "restapi", "", "HTTP statistic server listen address")
flag.StringVar(&key.TCPSendBufferSize, "tcp-sndbuf", "", "Set TCP send buffer size for netstack")
flag.StringVar(&key.TCPReceiveBufferSize, "tcp-rcvbuf", "", "Set TCP receive buffer size for netstack")
flag.BoolVar(&key.TCPModerateReceiveBuffer, "tcp-auto-tuning", false, "Enable TCP receive buffer auto-tuning")
flag.StringVar(&key.MulticastGroups, "multicast-groups", "", "Set multicast groups, separated by commas")
flag.StringVar(&key.TUNPreUp, "tun-pre-up", "", "Execute a command before TUN device setup")
flag.StringVar(&key.TUNPostUp, "tun-post-up", "", "Execute a command after TUN device setup")
flag.BoolVar(&versionFlag, "version", false, "Show version and then quit")
flag.Parse()
}
func main() {
maxprocs.Set(maxprocs.Logger(func(string, ...any) {}))
if versionFlag {
fmt.Println(version.String())
fmt.Println(version.BuildString())
os.Exit(0)
}
if configFile != "" {
data, err := os.ReadFile(configFile)
if err != nil {
log.Fatalf("Failed to read config file '%s': %v", configFile, err)
}
if err = yaml.Unmarshal(data, key); err != nil {
log.Fatalf("Failed to unmarshal config file '%s': %v", configFile, err)
}
}
engine.Insert(key)
engine.Start()
defer engine.Stop()
sigCh := make(chan os.Signal, 1)
signal.Notify(sigCh, syscall.SIGINT, syscall.SIGTERM)
<-sigCh
}