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