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         ssl     = flag.Bool("ssl", false, "Use SSL only.")
  39         sslKey  = flag.String("ssl_key", "", "SSL keyfile.")
  40         sslCert = flag.String("ssl_cert", "", "SSL certificate.")
  41
  42         verbose = flag.Bool("v", false, "Enable verbose logging.")
  43 )
  44
  45 func Run() {
  46         var client *Client
  47         events := make(chan ClientEvent)
  48         log.SetFlags(log.Ldate | log.Lmicroseconds | log.Lshortfile)
  49
  50         log_sink := make(chan LogEvent)
  51         if *logdir == "" {
  52                 // Dummy logger
  53                 go func() {
  54                         for _ = range log_sink {
  55                         }
  56                 }()
  57         } else {
  58                 if !path.IsAbs(*logdir) {
  59                         log.Fatalln("Need absolute path for logdir")
  60                         return
  61                 }
  62                 go Logger(*logdir, log_sink)
  63                 log.Println(*logdir, "logger initialized")
  64         }
  65
  66         state_sink := make(chan StateEvent)
  67         daemon := NewDaemon(*hostname, *motd, log_sink, state_sink)
  68         daemon.Verbose = *verbose
  69         if *statedir == "" {
  70                 // Dummy statekeeper
  71                 go func() {
  72                         for _ = range state_sink {
  73                         }
  74                 }()
  75         } else {
  76                 if !path.IsAbs(*statedir) {
  77                         log.Fatalln("Need absolute path for statedir")
  78                 }
  79                 states, err := filepath.Glob(path.Join(*statedir, "#*"))
  80                 if err != nil {
  81                         log.Fatalln("Can not read statedir", err)
  82                 }
  83                 for _, state := range states {
  84                         buf, err := ioutil.ReadFile(state)
  85                         if err != nil {
  86                                 log.Fatalf("Can not read state %s: %v", state, err)
  87                         }
  88                         room, _ := daemon.RoomRegister(path.Base(state))
  89                         contents := strings.Split(string(buf), "\n")
  90                         if len(contents) < 2 {
  91                                 log.Printf("State corrupted for %s: %q", room.name, contents)
  92                         } else {
  93                                 room.topic = contents[0]
  94                                 room.key = contents[1]
  95                                 log.Println("Loaded state for room", room.name)
  96                         }
  97                 }
  98                 go StateKeeper(*statedir, state_sink)
  99                 log.Println(*statedir, "statekeeper initialized")
 100         }
 101
 102         var listener net.Listener
 103         if *ssl {
 104                 cert, err := tls.LoadX509KeyPair(*sslCert, *sslKey)
 105                 if err != nil {
 106                         log.Fatalf("Could not load SSL keys from %s and %s: %s", *sslCert, *sslKey, err)
 107                 }
 108                 config := tls.Config{Certificates: []tls.Certificate{cert}}
 109                 listener, err = tls.Listen("tcp", *bind, &config)
 110                 if err != nil {
 111                         log.Fatalf("Can not listen on %s: %v", *bind, err)
 112                 }
 113         } else {
 114                 var err error
 115                 listener, err = net.Listen("tcp", *bind)
 116                 if err != nil {
 117                         log.Fatalf("Can not listen on %s: %v", *bind, err)
 118                 }
 119         }
 120         log.Println("Listening on", *bind)
 121
 122         go daemon.Processor(events)
 123         for {
 124                 conn, err := listener.Accept()
 125                 if err != nil {
 126                         log.Println("Error during accepting connection", err)
 127                         continue
 128                 }
 129                 client = NewClient(*hostname, conn)
 130                 go client.Processor(events)
 131         }
 132 }
 133
 134 func main() {
 135         flag.Parse()
 136         Run()
 137 }