src/cypherpunks.ru/nncp/cmd/nncp-daemon/main.go

   1 /*
   2 NNCP -- Node to Node copy, utilities for store-and-forward data exchange
   3 Copyright (C) 2016-2017 Sergey Matveev <stargrave@stargrave.org>
   4
   5 This program is free software: you can redistribute it and/or modify
   6 it under the terms of the GNU General Public License as published by
   7 the Free Software Foundation, either version 3 of the License, or
   8 (at your option) any later version.
   9
  10 This program is distributed in the hope that it will be useful,
  11 but WITHOUT ANY WARRANTY; without even the implied warranty of
  12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13 GNU General Public License for more details.
  14
  15 You should have received a copy of the GNU General Public License
  16 along with this program.  If not, see <http://www.gnu.org/licenses/>.
  17 */
  18
  19 // NNCP TCP daemon
  20 package main
  21
  22 import (
  23         "flag"
  24         "fmt"
  25         "log"
  26         "net"
  27         "os"
  28         "strconv"
  29
  30         "cypherpunks.ru/nncp"
  31         "golang.org/x/net/netutil"
  32 )
  33
  34 func usage() {
  35         fmt.Fprintf(os.Stderr, nncp.UsageHeader())
  36         fmt.Fprintln(os.Stderr, "nncp-daemon -- TCP daemon\n")
  37         fmt.Fprintf(os.Stderr, "Usage: %s [options]\nOptions:\n", os.Args[0])
  38         flag.PrintDefaults()
  39 }
  40
  41 func main() {
  42         var (
  43                 cfgPath   = flag.String("cfg", nncp.DefaultCfgPath, "Path to configuration file")
  44                 niceRaw   = flag.Int("nice", 255, "Minimal required niceness")
  45                 bind      = flag.String("bind", "[::]:5400", "Address to bind to")
  46                 maxConn   = flag.Int("maxconn", 128, "Maximal number of simultaneous connections")
  47                 spoolPath = flag.String("spool", "", "Override path to spool")
  48                 logPath   = flag.String("log", "", "Override path to logfile")
  49                 quiet     = flag.Bool("quiet", false, "Print only errors")
  50                 debug     = flag.Bool("debug", false, "Print debug messages")
  51                 version   = flag.Bool("version", false, "Print version information")
  52                 warranty  = flag.Bool("warranty", false, "Print warranty information")
  53         )
  54         flag.Usage = usage
  55         flag.Parse()
  56         if *warranty {
  57                 fmt.Println(nncp.Warranty)
  58                 return
  59         }
  60         if *version {
  61                 fmt.Println(nncp.VersionGet())
  62                 return
  63         }
  64         if *niceRaw < 1 || *niceRaw > 255 {
  65                 log.Fatalln("-nice must be between 1 and 255")
  66         }
  67         nice := uint8(*niceRaw)
  68
  69         ctx, err := nncp.CtxFromCmdline(*cfgPath, *spoolPath, *logPath, *quiet, *debug)
  70         if err != nil {
  71                 log.Fatalln("Error during initialization:", err)
  72         }
  73         if ctx.Self == nil {
  74                 log.Fatalln("Config lacks private keys")
  75         }
  76
  77         ln, err := net.Listen("tcp", *bind)
  78         if err != nil {
  79                 log.Fatalln("Can not listen:", err)
  80         }
  81         ln = netutil.LimitListener(ln, *maxConn)
  82         for {
  83                 conn, err := ln.Accept()
  84                 if err != nil {
  85                         log.Fatalln("Can not accept connection:", err)
  86                 }
  87                 ctx.LogD("daemon", nncp.SDS{"addr": conn.RemoteAddr()}, "accepted")
  88                 go func(conn net.Conn) {
  89                         state, err := ctx.StartR(conn, nice, "")
  90                         if err == nil {
  91                                 ctx.LogI("call-start", nncp.SDS{"node": state.Node.Id}, "connected")
  92                                 state.Wait()
  93                                 ctx.LogI("call-finish", nncp.SDS{
  94                                         "node":     state.Node.Id,
  95                                         "duration": strconv.FormatInt(int64(state.Duration.Seconds()), 10),
  96                                         "rxbytes":  strconv.FormatInt(state.RxBytes, 10),
  97                                         "txbytes":  strconv.FormatInt(state.TxBytes, 10),
  98                                         "rxspeed":  strconv.FormatInt(state.RxSpeed, 10),
  99                                         "txspeed":  strconv.FormatInt(state.TxSpeed, 10),
 100                                 }, "")
 101                         } else {
 102                                 nodeId := "unknown"
 103                                 if state != nil && state.Node != nil {
 104                                         nodeId = state.Node.Id.String()
 105                                 }
 106                                 ctx.LogE("call-start", nncp.SDS{"node": nodeId, "err": err}, "")
 107                         }
 108                         conn.Close()
 109                 }(conn)
 110         }
 111 }