goircd.go

   1 /*
   2 goircd -- minimalistic simple Internet Relay Chat (IRC) server
   3 Copyright (C) 2014 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 package main
  19
  20 import (
  21         "crypto/tls"
  22         "flag"
  23         "io/ioutil"
  24         "log"
  25         "net"
  26         "os"
  27         "os/signal"
  28         "path"
  29         "path/filepath"
  30         "strings"
  31         "syscall"
  32 )
  33
  34 var (
  35         version   string
  36         hostname  = flag.String("hostname", "localhost", "Hostname")
  37         bind      = flag.String("bind", ":6667", "Address to bind to")
  38         motd      = flag.String("motd", "", "Path to MOTD file")
  39         logdir    = flag.String("logdir", "", "Absolute path to directory for logs")
  40         statedir  = flag.String("statedir", "", "Absolute path to directory for states")
  41         passwords = flag.String("passwords", "", "Optional path to passwords file")
  42
  43         tlsBind = flag.String("tlsbind", "", "TLS address to bind to")
  44         tlsKey  = flag.String("tlskey", "", "TLS keyfile")
  45         tlsCert = flag.String("tlscert", "", "TLS certificate")
  46
  47         verbose = flag.Bool("v", false, "Enable verbose logging.")
  48 )
  49
  50 func listenerLoop(sock net.Listener, events chan<- ClientEvent) {
  51         for {
  52                 conn, err := sock.Accept()
  53                 if err != nil {
  54                         log.Println("Error during accepting connection", err)
  55                         continue
  56                 }
  57                 client := NewClient(*hostname, conn)
  58                 go client.Processor(events)
  59         }
  60 }
  61
  62 func Run() {
  63         events := make(chan ClientEvent)
  64         log.SetFlags(log.Ldate | log.Lmicroseconds | log.Lshortfile)
  65
  66         logSink := make(chan LogEvent)
  67         if *logdir == "" {
  68                 // Dummy logger
  69                 go func() {
  70                         for _ = range logSink {
  71                         }
  72                 }()
  73         } else {
  74                 if !path.IsAbs(*logdir) {
  75                         log.Fatalln("Need absolute path for logdir")
  76                         return
  77                 }
  78                 go Logger(*logdir, logSink)
  79                 log.Println(*logdir, "logger initialized")
  80         }
  81
  82         stateSink := make(chan StateEvent)
  83         daemon := NewDaemon(version, *hostname, *motd, logSink, stateSink)
  84         daemon.Verbose = *verbose
  85         log.Println("goircd "+daemon.version+" is starting")
  86         if *statedir == "" {
  87                 // Dummy statekeeper
  88                 go func() {
  89                         for _ = range stateSink {
  90                         }
  91                 }()
  92         } else {
  93                 if !path.IsAbs(*statedir) {
  94                         log.Fatalln("Need absolute path for statedir")
  95                 }
  96                 states, err := filepath.Glob(path.Join(*statedir, "#*"))
  97                 if err != nil {
  98                         log.Fatalln("Can not read statedir", err)
  99                 }
 100                 for _, state := range states {
 101                         buf, err := ioutil.ReadFile(state)
 102                         if err != nil {
 103                                 log.Fatalf("Can not read state %s: %v", state, err)
 104                         }
 105                         room, _ := daemon.RoomRegister(path.Base(state))
 106                         contents := strings.Split(string(buf), "\n")
 107                         if len(contents) < 2 {
 108                                 log.Printf("State corrupted for %s: %q", room.name, contents)
 109                         } else {
 110                                 room.topic = contents[0]
 111                                 room.key = contents[1]
 112                                 log.Println("Loaded state for room", room.name)
 113                         }
 114                 }
 115                 go StateKeeper(*statedir, stateSink)
 116                 log.Println(*statedir, "statekeeper initialized")
 117         }
 118
 119         if *passwords != "" {
 120                 daemon.PasswordsRefresh()
 121                 hups := make(chan os.Signal)
 122                 signal.Notify(hups, syscall.SIGHUP)
 123                 go func() {
 124                         for {
 125                                 <-hups
 126                                 daemon.PasswordsRefresh()
 127                         }
 128                 }()
 129         }
 130
 131
 132         if *bind != "" {
 133                 listener, err := net.Listen("tcp", *bind)
 134                 if err != nil {
 135                         log.Fatalf("Can not listen on %s: %v", *bind, err)
 136                 }
 137                 log.Println("Raw listening on", *bind)
 138                 go listenerLoop(listener, events)
 139         }
 140         if *tlsBind != "" {
 141                 cert, err := tls.LoadX509KeyPair(*tlsCert, *tlsKey)
 142                 if err != nil {
 143                         log.Fatalf("Could not load TLS keys from %s and %s: %s", *tlsCert, *tlsKey, err)
 144                 }
 145                 config := tls.Config{Certificates: []tls.Certificate{cert}}
 146                 listenerTLS, err := tls.Listen("tcp", *tlsBind, &config)
 147                 if err != nil {
 148                         log.Fatalf("Can not listen on %s: %v", *tlsBind, err)
 149                 }
 150                 log.Println("TLS listening on", *tlsBind)
 151                 go listenerLoop(listenerTLS, events)
 152         }
 153
 154         daemon.Processor(events)
 155 }
 156
 157 func main() {
 158         flag.Parse()
 159         Run()
 160 }