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