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// 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/revocation"
"github.com/bfix/gospel/logger"
)
func main() {
defer func() {
logger.Println(logger.INFO, "[revocation] Bye.")
// flush last messages
logger.Flush()
}()
logger.Println(logger.INFO, "[revocation] 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(¶m, "p", "", "socket parameters (<key>=<value>,...)")
flag.IntVar(&logLevel, "L", logger.INFO, "REVOCATION 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, "[revocation] Invalid configuration file: %s\n", err.Error())
return
}
// apply configuration
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 REVOCATION service
ctx, cancel := context.WithCancel(context.Background())
rvc := revocation.NewService()
srv := service.NewSocketHandler("revocation", rvc)
if err = srv.Start(ctx, socket, params); err != nil {
logger.Printf(logger.ERROR, "[revocation] Error: '%s'\n", 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, "[revocation] 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, "[revocation] RPC failed to start: %s", err.Error())
return
}
rpc.Register(rvc)
}
// 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, "[revocation] Terminating service (on signal '%s')\n", sig)
break loop
case syscall.SIGHUP:
logger.Println(logger.INFO, "[revocation] SIGHUP")
case syscall.SIGURG:
// TODO: https://github.com/golang/go/issues/37942
default:
logger.Println(logger.INFO, "[revocation] Unhandled signal: "+sig.String())
}
// handle heart beat
case now := <-tick.C:
logger.Println(logger.INFO, "[revocation] Heart beat at "+now.String())
}
}
// terminating service
cancel()
srv.Stop()
}
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