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