goircd.go

   1 /*
   2 goircd -- minimalistic simple Internet Relay Chat (IRC) server
   3 Copyright (C) 2014-2020 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, version 3 of the License.
   8
   9 This program is distributed in the hope that it will be useful,
  10 but WITHOUT ANY WARRANTY; without even the implied warranty of
  11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12 GNU General Public License for more details.
  13
  14 You should have received a copy of the GNU General Public License
  15 along with this program.  If not, see <http://www.gnu.org/licenses/>.
  16 */
  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 const Version = "1.8.2"
  32
  33 var (
  34         hostname  = flag.String("hostname", "localhost", "Hostname")
  35         bind      = flag.String("bind", ":6667", "Address to bind to")
  36         motd      = flag.String("motd", "", "Path to MOTD file")
  37         logdir    = flag.String("logdir", "", "Absolute path to directory for logs")
  38         statedir  = flag.String("statedir", "", "Absolute path to directory for states")
  39         passwords = flag.String("passwords", "", "Optional path to passwords file")
  40         tlsBind   = flag.String("tlsbind", "", "TLS address to bind to")
  41         tlsPEM    = flag.String("tlspem", "", "Path to TLS certificat+key PEM file")
  42         verbose   = flag.Bool("v", false, "Enable verbose logging.")
  43 )
  44
  45 func listenerLoop(sock net.Listener, events chan ClientEvent) {
  46         for {
  47                 conn, err := sock.Accept()
  48                 if err != nil {
  49                         log.Println("Error during accepting connection", err)
  50                         continue
  51                 }
  52                 client := NewClient(conn)
  53                 go client.Processor(events)
  54         }
  55 }
  56
  57 func Run() {
  58         events := make(chan ClientEvent)
  59         log.SetFlags(log.Ldate | log.Lmicroseconds | log.Lshortfile)
  60
  61         if *logdir == "" {
  62                 // Dummy logger
  63                 go func() {
  64                         for _ = range logSink {
  65                         }
  66                 }()
  67         } else {
  68                 if !path.IsAbs(*logdir) {
  69                         log.Fatalln("Need absolute path for logdir")
  70                 }
  71                 go Logger(*logdir, logSink)
  72                 log.Println(*logdir, "logger initialized")
  73         }
  74
  75         log.Println("goircd " + Version + " is starting")
  76         if *statedir == "" {
  77                 // Dummy statekeeper
  78                 go func() {
  79                         for _ = range stateSink {
  80                         }
  81                 }()
  82         } else {
  83                 if !path.IsAbs(*statedir) {
  84                         log.Fatalln("Need absolute path for statedir")
  85                 }
  86                 states, err := filepath.Glob(path.Join(*statedir, "#*"))
  87                 if err != nil {
  88                         log.Fatalln("Can not read statedir", err)
  89                 }
  90                 for _, state := range states {
  91                         buf, err := ioutil.ReadFile(state)
  92                         if err != nil {
  93                                 log.Fatalf("Can not read state %s: %v", state, err)
  94                         }
  95                         room, _ := RoomRegister(path.Base(state))
  96                         contents := strings.Split(string(buf), "\n")
  97                         if len(contents) < 2 {
  98                                 log.Printf("State corrupted for %s: %q", *room.name, contents)
  99                         } else {
 100                                 room.topic = &contents[0]
 101                                 room.key = &contents[1]
 102                                 log.Println("Loaded state for room", *room.name)
 103                         }
 104                 }
 105                 go StateKeeper(*statedir, stateSink)
 106                 log.Println(*statedir, "statekeeper initialized")
 107         }
 108
 109         if *bind != "" {
 110                 listener, err := net.Listen("tcp", *bind)
 111                 if err != nil {
 112                         log.Fatalf("Can not listen on %s: %v", *bind, err)
 113                 }
 114                 log.Println("Raw listening on", *bind)
 115                 go listenerLoop(listener, events)
 116         }
 117         if *tlsBind != "" {
 118                 cert, err := tls.LoadX509KeyPair(*tlsPEM, *tlsPEM)
 119                 if err != nil {
 120                         log.Fatalf("Could not load TLS keys from %s: %s", *tlsPEM, err)
 121                 }
 122                 config := tls.Config{Certificates: []tls.Certificate{cert}}
 123                 listenerTLS, err := tls.Listen("tcp", *tlsBind, &config)
 124                 if err != nil {
 125                         log.Fatalf("Can not listen on %s: %v", *tlsBind, err)
 126                 }
 127                 log.Println("TLS listening on", *tlsBind)
 128                 go listenerLoop(listenerTLS, events)
 129         }
 130         Processor(events, make(chan struct{}))
 131 }
 132
 133 func main() {
 134         flag.Parse()
 135         Run()
 136 }