1 files changed, 139 insertions, 0 deletions

diff --git a/src/gnunet/cmd/gnunet-service-gns-go/main.go b/src/gnunet/cmd/gnunet-service-gns-go/main.go
new file mode 100644
index 0000000..6eb027b
--- /dev/null
+++ b/src/gnunet/cmd/gnunet-service-gns-go/main.go
@@ -0,0 +1,139 @@
+// This file is part of gnunet-go, a GNUnet-implementation in Golang.
+// Copyright (C) 2019, 2020 Bernd Fix  >Y<
+//
+// gnunet-go is free software: you can redistribute it and/or modify it
+// under the terms of the GNU Affero General Public License as published
+// by the Free Software Foundation, either version 3 of the License,
+// or (at your option) any later version.
+//
+// gnunet-go is distributed in the hope that it will be useful, but
+// WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+// Affero General Public License for more details.
+//
+// You should have received a copy of the GNU Affero General Public License
+// along with this program.  If not, see <http://www.gnu.org/licenses/>.
+//
+// SPDX-License-Identifier: AGPL3.0-or-later
+
+package main
+
+import (
+        "context"
+        "flag"
+        "os"
+        "os/signal"
+        "strings"
+        "syscall"
+        "time"
+
+        "gnunet/config"
+        "gnunet/rpc"
+        "gnunet/service"
+        "gnunet/service/gns"
+
+        "github.com/bfix/gospel/logger"
+)
+
+func main() {
+        defer func() {
+                logger.Println(logger.INFO, "[gns] Bye.")
+                // flush last messages
+                logger.Flush()
+        }()
+        logger.Println(logger.INFO, "[gns] Starting service...")
+
+        var (
+                cfgFile  string
+                socket   string
+                param    string
+                err      error
+                logLevel int
+                rpcEndp  string
+        )
+        // handle command line arguments
+        flag.StringVar(&cfgFile, "c", "gnunet-config.json", "GNUnet configuration file")
+        flag.StringVar(&socket, "s", "", "GNS service socket")
+        flag.StringVar(&param, "p", "", "socket parameters (<key>=<value>,...)")
+        flag.IntVar(&logLevel, "L", logger.INFO, "GNS log level (default: INFO)")
+        flag.StringVar(&rpcEndp, "R", "", "JSON-RPC endpoint (default: none)")
+        flag.Parse()
+
+        // read configuration file and set missing arguments.
+        if err = config.ParseConfig(cfgFile); err != nil {
+                logger.Printf(logger.ERROR, "[gns] Invalid configuration file: %s\n", err.Error())
+                return
+        }
+
+        // apply configuration (from file and command-line)
+        logger.SetLogLevel(logLevel)
+        if len(socket) == 0 {
+                socket = config.Cfg.GNS.Service.Socket
+        }
+        params := make(map[string]string)
+        if len(param) == 0 {
+                for _, p := range strings.Split(param, ",") {
+                        kv := strings.SplitN(p, "=", 2)
+                        params[kv[0]] = kv[1]
+                }
+        } else {
+                params = config.Cfg.GNS.Service.Params
+        }
+
+        // start a new GNS service
+        ctx, cancel := context.WithCancel(context.Background())
+        gns := gns.NewService()
+        srv := service.NewSocketHandler("gns", gns)
+        if err = srv.Start(ctx, socket, params); err != nil {
+                logger.Printf(logger.ERROR, "[gns] Error: '%s'", err.Error())
+                return
+        }
+
+        // start JSON-RPC server on request
+        if len(rpcEndp) > 0 {
+                parts := strings.Split(rpcEndp, ":")
+                if parts[0] != "tcp" {
+                        logger.Println(logger.ERROR, "[gns] RPC must have a TCP/IP endpoint")
+                        return
+                }
+                config.Cfg.RPC.Endpoint = parts[1]
+                if err = rpc.Start(ctx); err != nil {
+                        logger.Printf(logger.ERROR, "[gns] RPC failed to start: %s", err.Error())
+                        return
+                }
+                rpc.Register(gns)
+        }
+
+        // handle OS signals
+        sigCh := make(chan os.Signal, 5)
+        signal.Notify(sigCh)
+
+        // heart beat
+        tick := time.NewTicker(5 * time.Minute)
+
+loop:
+        for {
+                select {
+                // handle OS signals
+                case sig := <-sigCh:
+                        switch sig {
+                        case syscall.SIGKILL, syscall.SIGINT, syscall.SIGTERM:
+                                logger.Printf(logger.INFO, "[gns] Terminating service (on signal '%s')\n", sig)
+                                break loop
+                        case syscall.SIGHUP:
+                                logger.Println(logger.INFO, "[gns] SIGHUP")
+                        case syscall.SIGURG:
+                                // TODO: https://github.com/golang/go/issues/37942
+                        default:
+                                logger.Println(logger.INFO, "[gns] Unhandled signal: "+sig.String())
+                        }
+                // handle heart beat
+                case now := <-tick.C:
+                        logger.Println(logger.INFO, "[gns] Heart beat at "+now.String())
+                }
+        }
+
+        // terminating service
+        cancel()
+        srv.Stop()
+}