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main.go
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main.go
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package main
import (
"context"
"fmt"
"log"
"net"
"net/http"
"os"
"os/signal"
"strconv"
"syscall"
"time"
"google.golang.org/grpc"
"github.com/cad/ovpm"
"github.com/cad/ovpm/api"
"github.com/sirupsen/logrus"
"github.com/urfave/cli"
)
var action string
var db *ovpm.DB
func main() {
app := cli.NewApp()
app.Name = "ovpmd"
app.Usage = "OpenVPN Manager Daemon"
app.Version = ovpm.Version
app.Flags = []cli.Flag{
cli.BoolFlag{
Name: "verbose",
Usage: "verbose output",
},
cli.StringFlag{
Name: "port",
Usage: "port number for gRPC API daemon",
},
cli.StringFlag{
Name: "web-port",
Usage: "port number for the REST API daemon",
},
}
app.Before = func(c *cli.Context) error {
logrus.SetLevel(logrus.InfoLevel)
if c.GlobalBool("verbose") {
logrus.SetLevel(logrus.DebugLevel)
}
db = ovpm.CreateDB("sqlite3", "")
return nil
}
app.After = func(c *cli.Context) error {
db.Cease()
return nil
}
app.Action = func(c *cli.Context) error {
port := c.String("port")
if port == "" {
port = "9090"
}
webPort := c.String("web-port")
if webPort == "" {
webPort = "8080"
}
s := newServer(port, webPort)
s.start()
s.waitForInterrupt()
s.stop()
return nil
}
app.Run(os.Args)
}
type server struct {
grpcPort string
lis net.Listener
restLis net.Listener
grpcServer *grpc.Server
restServer http.Handler
restCancel context.CancelFunc
restPort string
signal chan os.Signal
done chan bool
}
func newServer(port, webPort string) *server {
sigs := make(chan os.Signal, 1)
done := make(chan bool, 1)
signal.Notify(sigs, syscall.SIGINT, syscall.SIGTERM)
go func() {
sig := <-sigs
fmt.Println()
fmt.Println(sig)
done <- true
}()
if !ovpm.Testing {
// NOTE(cad): gRPC endpoint listens on localhost. This is important
// because we don't authenticate requests coming from localhost.
// So gRPC endpoint should never listen on something else then
// localhost.
lis, err := net.Listen("tcp4", fmt.Sprintf("127.0.0.1:%s", port))
if err != nil {
logrus.Fatalf("could not listen to port %s: %v", port, err)
}
restLis, err := net.Listen("tcp4", fmt.Sprintf("0.0.0.0:%s", webPort))
if err != nil {
logrus.Fatalf("could not listen to port %s: %v", webPort, err)
}
rpcServer := api.NewRPCServer()
restServer, restCancel, err := api.NewRESTServer(port)
if err != nil {
logrus.Fatalf("could not get new rest server :%v", err)
}
return &server{
lis: lis,
restLis: restLis,
grpcServer: rpcServer,
restServer: restServer,
restCancel: context.CancelFunc(restCancel),
restPort: webPort,
signal: sigs,
done: done,
grpcPort: port,
}
}
return &server{}
}
func (s *server) start() {
logrus.Infof("OVPM %s is running gRPC:%s, REST:%s ...", ovpm.Version, s.grpcPort, s.restPort)
go s.grpcServer.Serve(s.lis)
go http.Serve(s.restLis, s.restServer)
ovpm.TheServer().StartVPNProc()
}
func (s *server) stop() {
logrus.Info("OVPM is shutting down ...")
s.grpcServer.Stop()
s.restCancel()
ovpm.TheServer().StopVPNProc()
}
func (s *server) waitForInterrupt() {
<-s.done
go timeout(8 * time.Second)
}
func timeout(interval time.Duration) {
time.Sleep(interval)
log.Println("Timeout! Killing the main thread...")
os.Exit(-1)
}
func stringInSlice(a string, list []string) bool {
for _, b := range list {
if b == a {
return true
}
}
return false
}
func increasePort(p string) string {
i, err := strconv.Atoi(p)
if err != nil {
logrus.Panicf(fmt.Sprintf("can't convert %s to int: %v", p, err))
}
i++
return fmt.Sprintf("%d", i)
}