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