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         tlsKey  = flag.String("tls_key", "", "TLS keyfile")
  44         tlsCert = flag.String("tls_cert", "", "TLS certificate")
  45
  46         verbose = flag.Bool("v", false, "Enable verbose logging.")
  47 )
  48
  49 func Run() {
  50         var client *Client
  51         events := make(chan ClientEvent)
  52         log.SetFlags(log.Ldate | log.Lmicroseconds | log.Lshortfile)
  53
  54         logSink := make(chan LogEvent)
  55         if *logdir == "" {
  56                 // Dummy logger
  57                 go func() {
  58                         for _ = range logSink {
  59                         }
  60                 }()
  61         } else {
  62                 if !path.IsAbs(*logdir) {
  63                         log.Fatalln("Need absolute path for logdir")
  64                         return
  65                 }
  66                 go Logger(*logdir, logSink)
  67                 log.Println(*logdir, "logger initialized")
  68         }
  69
  70         stateSink := make(chan StateEvent)
  71         daemon := NewDaemon(version, *hostname, *motd, logSink, stateSink)
  72         daemon.Verbose = *verbose
  73         if *statedir == "" {
  74                 // Dummy statekeeper
  75                 go func() {
  76                         for _ = range stateSink {
  77                         }
  78                 }()
  79         } else {
  80                 if !path.IsAbs(*statedir) {
  81                         log.Fatalln("Need absolute path for statedir")
  82                 }
  83                 states, err := filepath.Glob(path.Join(*statedir, "#*"))
  84                 if err != nil {
  85                         log.Fatalln("Can not read statedir", err)
  86                 }
  87                 for _, state := range states {
  88                         buf, err := ioutil.ReadFile(state)
  89                         if err != nil {
  90                                 log.Fatalf("Can not read state %s: %v", state, err)
  91                         }
  92                         room, _ := daemon.RoomRegister(path.Base(state))
  93                         contents := strings.Split(string(buf), "\n")
  94                         if len(contents) < 2 {
  95                                 log.Printf("State corrupted for %s: %q", room.name, contents)
  96                         } else {
  97                                 room.topic = contents[0]
  98                                 room.key = contents[1]
  99                                 log.Println("Loaded state for room", room.name)
 100                         }
 101                 }
 102                 go StateKeeper(*statedir, stateSink)
 103                 log.Println(*statedir, "statekeeper initialized")
 104         }
 105
 106         var listener net.Listener
 107         if *tlsKey != "" {
 108                 cert, err := tls.LoadX509KeyPair(*tlsCert, *tlsKey)
 109                 if err != nil {
 110                         log.Fatalf("Could not load TLS keys from %s and %s: %s", *tlsCert, *tlsKey, err)
 111                 }
 112                 config := tls.Config{Certificates: []tls.Certificate{cert}}
 113                 listener, err = tls.Listen("tcp", *bind, &config)
 114                 if err != nil {
 115                         log.Fatalf("Can not listen on %s: %v", *bind, err)
 116                 }
 117         } else {
 118                 var err error
 119                 listener, err = net.Listen("tcp", *bind)
 120                 if err != nil {
 121                         log.Fatalf("Can not listen on %s: %v", *bind, err)
 122                 }
 123         }
 124         log.Println("goircd "+daemon.version+" listening on", *bind)
 125
 126         if *passwords != "" {
 127                 daemon.PasswordsRefresh()
 128                 hups := make(chan os.Signal)
 129                 signal.Notify(hups, syscall.SIGHUP)
 130                 go func() {
 131                         for {
 132                                 <-hups
 133                                 daemon.PasswordsRefresh()
 134                         }
 135                 }()
 136         }
 137
 138         go daemon.Processor(events)
 139         for {
 140                 conn, err := listener.Accept()
 141                 if err != nil {
 142                         log.Println("Error during accepting connection", err)
 143                         continue
 144                 }
 145                 client = NewClient(*hostname, conn)
 146                 go client.Processor(events)
 147         }
 148 }
 149
 150 func main() {
 151         flag.Parse()
 152         Run()
 153 }