2 goircd -- minimalistic simple Internet Relay Chat (IRC) server
3 Copyright (C) 2014-2023 Sergey Matveev <stargrave@stargrave.org>
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.
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.
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/>.
37 StateTopicFilename = "topic"
38 StateKeyFilename = "key"
50 type ClientEvent struct {
56 type StateEvent struct {
63 hostname = flag.String("hostname", "localhost", "hostname")
64 bind = flag.String("bind", "[::1]:6667", "address to bind to")
65 cloak = flag.String("cloak", "", "cloak user's host with the given hostname")
66 motd = flag.String("motd", "", "path to MOTD file")
67 logdir = flag.String("logdir", "", "absolute path to directory for logs")
68 statedir = flag.String("statedir", "", "absolute path to directory for states")
69 passwords = flag.String("passwd", "", "optional path to passwords file")
70 tlsBind = flag.String("tlsbind", "", "TLS address to bind to")
71 tlsPEM = flag.String("tlspem", "", "path to TLS certificat+key PEM file")
72 permStateDirS = flag.String("perm-state-dir", "755", "state directory permissions")
73 permStateFileS = flag.String("perm-state-file", "600", "state files permissions")
74 permLogFileS = flag.String("perm-log-file", "644", "log files permissions")
75 timestamped = flag.Bool("timestamped", false, "enable timestamps on stderr messages")
76 verbose = flag.Bool("verbose", false, "enable verbose logging")
77 debug = flag.Bool("debug", false, "enable debug (traffic) logging")
79 permStateDir os.FileMode
80 permStateFile os.FileMode
81 permLogFile os.FileMode
83 stateSink chan StateEvent = make(chan StateEvent)
86 func permParse(s string) os.FileMode {
87 r, err := strconv.ParseUint(s, 8, 16)
94 func listenerLoop(ln net.Listener, events chan ClientEvent) {
96 conn, err := ln.Accept()
98 log.Println("error during accept", err)
101 NewClient(conn, events)
107 permStateDir = permParse(*permStateDirS)
108 permStateFile = permParse(*permStateFileS)
109 permLogFile = permParse(*permLogFileS)
112 log.SetFlags(log.Ldate | log.Lmicroseconds | log.Lshortfile)
114 log.SetFlags(log.Lshortfile)
116 log.SetOutput(os.Stdout)
125 if !path.IsAbs(*logdir) {
126 log.Fatalln("need absolute path for logdir")
128 go Logger(*logdir, logSink)
134 for range stateSink {
138 if !path.IsAbs(*statedir) {
139 log.Fatalln("need absolute path for statedir")
141 states, err := filepath.Glob(path.Join(*statedir, "#*"))
143 log.Fatalln("can not read statedir", err)
145 for _, state := range states {
146 buf, err := os.ReadFile(path.Join(state, StateTopicFilename))
149 "can not read state %s/%s: %v",
150 state, StateTopicFilename, err,
153 room := RoomRegister(path.Base(state))
154 room.topic = strings.TrimRight(string(buf), "\n")
155 buf, err = os.ReadFile(path.Join(state, StateKeyFilename))
157 room.key = strings.TrimRight(string(buf), "\n")
159 if !os.IsNotExist(err) {
161 "can not read state %s/%s: %v",
162 state, StateKeyFilename, err,
166 log.Println("loaded state for room:", room.name)
170 for event := range stateSink {
171 statePath := path.Join(*statedir, event.where)
172 if _, err := os.Stat(statePath); os.IsNotExist(err) {
173 if err := os.Mkdir(statePath, permStateDir); err != nil {
174 log.Printf("can not create state %s: %v", statePath, err)
179 topicPath := path.Join(statePath, StateTopicFilename)
180 if err := os.WriteFile(
182 []byte(event.topic+"\n"),
185 log.Printf("can not write statefile %s: %v", topicPath, err)
189 keyPath := path.Join(statePath, StateKeyFilename)
190 if err := os.WriteFile(
192 []byte(event.key+"\n"),
195 log.Printf("can not write statefile %s: %v", keyPath, err)
201 events := make(chan ClientEvent)
203 ln, err := net.Listen("tcp", *bind)
205 log.Fatalf("can not listen on %s: %v", *bind, err)
207 go listenerLoop(ln, events)
210 cert, err := tls.LoadX509KeyPair(*tlsPEM, *tlsPEM)
212 log.Fatalf("can not load TLS keys from %s: %s", *tlsPEM, err)
214 config := tls.Config{Certificates: []tls.Certificate{cert}}
215 ln, err := tls.Listen("tcp", *tlsBind, &config)
217 log.Fatalf("can not listen on %s: %v", *tlsBind, err)
219 go listenerLoop(ln, events)
221 log.Println("goircd", Version, "started")
223 needsShutdown := make(chan os.Signal, 0)
224 signal.Notify(needsShutdown, syscall.SIGTERM, syscall.SIGINT)
227 events <- ClientEvent{eventType: EventTerm}
228 log.Println("goircd shutting down")
231 finished := make(chan struct{})
232 go Processor(events, finished)