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* Sergey Matveev <stargrave@stargrave.org>

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GNU GENERAL PUBLIC LICENSE
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goircd requires only standard Go's libraries and consists of single main
package. You can install it using either:
% go get github.com/stargrave/goircd
% go install github.com/stargrave/goircd
or if you are already inside goircd directory:
% go install
You should found goircd executable binary in your $GOPATH/bin/goircd.
Just run it with -help argument to see available options.

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goircd -- minimalistic simple Internet Relay Chat (IRC) server
==============================================================
SYNOPSIS
goircd is very simple IRC server, written on Go.
DESCRIPTION
It is heavily inspired by miniircd daemon written on Python.
It is not aimed to replace full featured mass scalable IRC networks:
* It can not connect to other servers. Just standalone installation
* It has few basic IRC commands
* There is not support for channel operators, modes, votes, invites
and so on
* No ident lookups, reverse DNS queries
But it has some convincing features:
* Only standard Go libraries, no external requirements
* Single executable binary
* No configuration file, just few command line arguments
* IPv6 out-of-box support
* Optional channel logging to plain text files
* Optional permanent channel's state saving in plain text files
(so you can reload daemon and all channels topics and keys won't
disappear)
Some remarks and recommendations related to it's simplicity:
* Use either nohup or similar tools to daemonize it
* Use either crywrap or similar tools for TLS-capable connections
* Just plain logging on stderr, without syslog support
SUPPORTED IRC COMMANDS
* NICK/USER during registration workflow
* PING/PONGs
* NOTICE/PRIVMSG
* MOTD, LUSERS, WHO, WHOIS, QUIT
* LIST, JOIN, TOPIC, +k/-k channel MODE
USAGE
Just execute goircd daemon. It has following optional arguments:
* -hostname: hostname to show for client's connections
* -bind: address to bind to (:6667 be default)
* -motd: absolute path to MOTD file. It is reread every time MOTD is
requested
* -logdir: directory where all channels messages will be saved. If
omitted, then no logs will be kept
* -statedir: directory where all channels states will be saved and
loaded during startup. If omitted, then states will be
lost after daemon termination
LICENCE
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.

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* Cover all available commands with unittests

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/*
goircd -- minimalistic simple Internet Relay Chat (IRC) server
Copyright (C) 2014 Sergey Matveev <stargrave@stargrave.org>
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
package main
import (
"bytes"
"log"
"net"
"strings"
"time"
)
const (
CRLF = "\x0d\x0a"
BUF_SIZE = 1380
)
type Client struct {
hostname string
conn net.Conn
registered bool
ping_sent bool
timestamp time.Time
nickname string
username string
realname string
}
func (client Client) String() string {
return client.nickname + "!" + client.username + "@" + client.conn.RemoteAddr().String()
}
func NewClient(hostname string, conn net.Conn) *Client {
return &Client{hostname: hostname, conn: conn, nickname: "*"}
}
// Client processor blockingly reads everything remote client sends,
// splits messages by CRLF and send them to Daemon gorouting for processing
// it futher. Also it can signalize that client is unavailable (disconnected).
func (client *Client) Processor(sink chan ClientEvent) {
var buf_net []byte
buf := make([]byte, 0)
log.Println("New client", client)
sink <- ClientEvent{client, EVENT_NEW, ""}
for {
buf_net = make([]byte, BUF_SIZE)
_, err := client.conn.Read(buf_net)
if err != nil {
log.Println(client, "connection lost", err)
sink <- ClientEvent{client, EVENT_DEL, ""}
break
}
client.timestamp = time.Now()
client.ping_sent = false
buf_net = bytes.TrimRight(buf_net, "\x00")
buf = append(buf, buf_net...)
if !bytes.HasSuffix(buf, []byte(CRLF)) {
continue
}
for _, msg := range bytes.Split(buf[:len(buf)-2], []byte(CRLF)) {
if len(msg) > 0 {
sink <- ClientEvent{client, EVENT_MSG, string(msg)}
}
}
buf = []byte{}
}
}
// Send message as is with CRLF appended.
func (client *Client) Msg(text string) {
client.conn.Write([]byte(text + CRLF))
}
// Send message from server. It has ": servername" prefix.
func (client *Client) Reply(text string) {
client.Msg(":" + client.hostname + " " + text)
}
// Send server message, concatenating all provided text parts and
// prefix the last one with ":".
func (client *Client) ReplyParts(code string, text ...string) {
parts := []string{code}
for _, t := range text {
parts = append(parts, t)
}
parts[len(parts)-1] = ":" + parts[len(parts)-1]
client.Reply(strings.Join(parts, " "))
}
// Send nicknamed server message. After servername it always has target
// client's nickname. The last part is prefixed with ":".
func (client *Client) ReplyNicknamed(code string, text ...string) {
client.ReplyParts(code, append([]string{client.nickname}, text...)...)
}
// Reply "461 not enough parameters" error for given command.
func (client *Client) ReplyNotEnoughParameters(command string) {
client.ReplyNicknamed("461", command, "Not enough parameters")
}
// Reply "403 no such channel" error for specified channel.
func (client *Client) ReplyNoChannel(channel string) {
client.ReplyNicknamed("403", channel, "No such channel")
}

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/*
goircd -- minimalistic simple Internet Relay Chat (IRC) server
Copyright (C) 2014 Sergey Matveev <stargrave@stargrave.org>
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
package main
import (
"net"
"testing"
"time"
)
// Testing network connection that satisfies net.Conn interface
// Can send predefined messages and store all written ones
type TestingConn struct {
msgs []string
msg_ptr int
incoming []string
closed bool
}
func NewTestingConn(msgs ...string) *TestingConn {
msgs_crlf := []string{}
for _, msg := range msgs {
msgs_crlf = append(msgs_crlf, msg+"\r\n")
}
return &TestingConn{msgs: msgs_crlf, msg_ptr: -1}
}
func (conn TestingConn) Error() string {
return "i am out"
}
func (conn *TestingConn) Read(b []byte) (n int, err error) {
conn.msg_ptr++
if len(conn.msgs) == conn.msg_ptr {
return 0, TestingConn{}
}
for n, bt := range []byte(conn.msgs[conn.msg_ptr]) {
b[n] = bt
}
return len(conn.msgs[conn.msg_ptr]), nil
}
type MyAddr struct{}
func (a MyAddr) String() string {
return "someclient"
}
func (a MyAddr) Network() string {
return "somenet"
}
func (conn *TestingConn) Write(b []byte) (n int, err error) {
conn.incoming = append(conn.incoming, string(b))
return 0, nil
}
func (conn *TestingConn) Close() error {
conn.closed = true
return nil
}
func (conn TestingConn) LocalAddr() net.Addr {
return nil
}
func (conn TestingConn) RemoteAddr() net.Addr {
return MyAddr{}
}
func (conn TestingConn) SetDeadline(t time.Time) error {
return nil
}
func (conn TestingConn) SetReadDeadline(t time.Time) error {
return nil
}
func (conn TestingConn) SetWriteDeadline(t time.Time) error {
return nil
}
// New client creation test. It must send an event about new client,
// two predefined messages from it and deletion one
func TestNewClient(t *testing.T) {
conn := NewTestingConn("foo", "bar")
sink := make(chan ClientEvent)
client := NewClient("foohost", conn)
go client.Processor(sink)
event := <-sink
if event.event_type != EVENT_NEW {
t.Fail()
}
event = <-sink
if (event.event_type != EVENT_MSG) || (event.text != "foo") {
t.Fail()
}
event = <-sink
if (event.event_type != EVENT_MSG) || (event.text != "bar") {
t.Fail()
}
event = <-sink
if event.event_type != EVENT_DEL {
t.Fail()
}
}
// Test replies formatting
func TestClientReplies(t *testing.T) {
conn := NewTestingConn("foo", "bar")
client := NewClient("foohost", conn)
client.nickname = "мойник"
client.Reply("hello")
if (len(conn.incoming) != 1) || (conn.incoming[0] != ":foohost hello\r\n") {
t.Fatal("did not recieve hello message")
}
client.ReplyParts("200", "foo", "bar")
if (len(conn.incoming) != 2) || (conn.incoming[1] != ":foohost 200 foo :bar\r\n") {
t.Fatal("did not recieve 200 message")
}
client.ReplyNicknamed("200", "foo", "bar")
if (len(conn.incoming) != 3) || (conn.incoming[2] != ":foohost 200 мойник foo :bar\r\n") {
t.Fatal("did not recieve nicknamed message")
}
client.ReplyNotEnoughParameters("CMD")
if (len(conn.incoming) != 4) || (conn.incoming[3] != ":foohost 461 мойник CMD :Not enough parameters\r\n") {
t.Fatal("did not recieve 461 message")
}
}

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/*
goircd -- minimalistic simple Internet Relay Chat (IRC) server
Copyright (C) 2014 Sergey Matveev <stargrave@stargrave.org>
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
package main
import (
"bytes"
"fmt"
"io"
"log"
"os"
"regexp"
"sort"
"strings"
"time"
)
const (
PING_TIMEOUT = time.Second * 180 // Max time deadline for client's unresponsiveness
PING_THRESHOLD = time.Second * 90 // Max idle client's time before PING are sent
ALIVENESS_CHECK = time.Second * 10 // Client's aliveness check period
)
type Daemon struct {
hostname string
motd string
clients map[*Client]bool
rooms map[string]*Room
room_sinks map[*Room]chan ClientEvent
last_aliveness_check time.Time
log_sink chan LogEvent
state_sink chan StateEvent
}
func NewDaemon(hostname, motd string, log_sink chan LogEvent, state_sink chan StateEvent) *Daemon {
daemon := Daemon{hostname: hostname, motd: motd}
daemon.clients = make(map[*Client]bool)
daemon.rooms = make(map[string]*Room)
daemon.room_sinks = make(map[*Room]chan ClientEvent)
daemon.log_sink = log_sink
daemon.state_sink = state_sink
return &daemon
}
func (daemon *Daemon) SendLusers(client *Client) {
lusers := 0
for client := range daemon.clients {
if client.registered {
lusers++
}
}
client.ReplyNicknamed("251", fmt.Sprintf("There are %d users and 0 services on 1 server", lusers))
}
func (daemon *Daemon) SendMotd(client *Client) {
if daemon.motd != "" {
fd, err := os.Open(daemon.motd)
if err == nil {
defer fd.Close()
motd := []byte{}
var err error
for err != io.EOF {
buf := make([]byte, 1024)
_, err = fd.Read(buf)
motd = append(motd, bytes.TrimRight(buf, "\x00")...)
}
client.ReplyNicknamed("375", "- "+daemon.hostname+" Message of the day -")
for _, s := range bytes.Split(motd, []byte("\n")) {
client.ReplyNicknamed("372", "- "+string(s))
}
client.ReplyNicknamed("376", "End of /MOTD command")
return
} else {
log.Println("Can not open motd file", daemon.motd, err)
}
}
client.ReplyNicknamed("422", "MOTD File is missing")
}
func (daemon *Daemon) SendWhois(client *Client, nicknames []string) {
for _, nickname := range nicknames {
nickname = strings.ToLower(nickname)
found := false
for c := range daemon.clients {
if c.nickname != nickname {
continue
}
found = true
client.ReplyNicknamed("311", c.nickname, c.username, c.conn.RemoteAddr().String(), "*", c.realname)
client.ReplyNicknamed("312", c.nickname, daemon.hostname, daemon.hostname)
subscriptions := []string{}
for _, room := range daemon.rooms {
for subscriber := range room.members {
if subscriber.nickname == nickname {
subscriptions = append(subscriptions, room.name)
}
}
}
sort.Strings(subscriptions)
client.ReplyNicknamed("319", c.nickname, strings.Join(subscriptions, " "))
client.ReplyNicknamed("318", c.nickname, "End of WHOIS list")
}
if !found {
client.ReplyNicknamed("401", nickname, "No such nickname")
}
}
}
func (daemon *Daemon) SendList(client *Client, cols []string) {
var rooms []string
if (len(cols) > 1) && (cols[1] != "") {
rooms = strings.Split(strings.Split(cols[1], " ")[0], ",")
} else {
rooms = []string{}
for room := range daemon.rooms {
rooms = append(rooms, room)
}
}
sort.Strings(rooms)
for _, room := range rooms {
r, found := daemon.rooms[room]
if found {
client.ReplyNicknamed("322", room, fmt.Sprintf("%d", len(r.members)), r.topic)
}
}
client.ReplyNicknamed("323", "End of LIST")
}
// Unregistered client workflow processor. Unregistered client:
// * is not PINGed
// * only QUIT, NICK and USER commands are processed
// * other commands are quietly ignored
// When client finishes NICK/USER workflow, then MOTD and LUSERS are send to him.
func (daemon *Daemon) ClientRegister(client *Client, command string, cols []string) {
switch command {
case "NICK":
if len(cols) == 1 || len(cols[1]) < 1 {
client.ReplyParts("431", "No nickname given")
return
}
nickname := strings.ToLower(cols[1])
nickname_found := false
for client := range daemon.clients {
if client.nickname == nickname {
nickname_found = true
}
}
if nickname_found {
client.ReplyParts("433", "*", cols[1], "Nickname is already in use")
return
}
if ok, _ := regexp.MatchString("^[^_-][_a-z0-9-]{1,50}$", nickname); !ok {
client.ReplyParts("432", "*", cols[1], "Erroneous nickname")
}
client.nickname = nickname
case "USER":
if len(cols) == 1 {
client.ReplyNotEnoughParameters("USER")
return
}
args := strings.SplitN(cols[1], " ", 4)
if len(args) < 4 {
client.ReplyNotEnoughParameters("USER")
return
}
client.username = args[0]
client.realname = strings.TrimLeft(args[3], ":")
}
if client.nickname != "*" && client.username != "" {
client.registered = true
client.ReplyNicknamed("001", "Hi, welcome to IRC")
client.ReplyNicknamed("002", "Your host is "+daemon.hostname+", running goircd")
client.ReplyNicknamed("003", "This server was created sometime")
client.ReplyNicknamed("004", daemon.hostname+" goircd o o")
daemon.SendLusers(client)
daemon.SendMotd(client)
}
}
// Register new room in Daemon. Create an object, events sink, save pointers
// to corresponding daemon's places and start room's processor goroutine.
func (daemon *Daemon) RoomRegister(name string) (*Room, chan ClientEvent) {
room_new := NewRoom(daemon.hostname, name, daemon.log_sink, daemon.state_sink)
room_sink := make(chan ClientEvent)
daemon.rooms[name] = room_new
daemon.room_sinks[room_new] = room_sink
go room_new.Processor(room_sink)
return room_new, room_sink
}
func (daemon *Daemon) HandlerJoin(client *Client, cmd string) {
args := strings.Split(cmd, " ")
rooms := strings.Split(args[0], ",")
var keys []string
if len(args) > 1 {
keys = strings.Split(args[1], ",")
} else {
keys = []string{}
}
for n, room := range rooms {
room, valid := RoomNameSanitize(room)
if !valid {
client.ReplyNoChannel(room)
continue
}
var key string
if (n < len(keys)) && (keys[n] != "") {
key = keys[n]
} else {
key = ""
}
denied := false
joined := false
for room_existing, room_sink := range daemon.room_sinks {
if room == room_existing.name {
if (room_existing.key != "") && (room_existing.key != key) {
denied = true
} else {
room_sink <- ClientEvent{client, EVENT_NEW, ""}
joined = true
}
break
}
}
if denied {
client.ReplyNicknamed("475", room, "Cannot join channel (+k) - bad key")
continue
}
if denied || joined {
continue
}
room_new, room_sink := daemon.RoomRegister(room)
if key != "" {
room_new.key = key
}
room_sink <- ClientEvent{client, EVENT_NEW, ""}
}
}
func (daemon *Daemon) Processor(events chan ClientEvent) {
for event := range events {
// Check for clients aliveness
now := time.Now()
if daemon.last_aliveness_check.Add(ALIVENESS_CHECK).Before(now) {
for c := range daemon.clients {
if c.timestamp.Add(PING_TIMEOUT).Before(now) {
log.Println(c, "ping timeout")
c.conn.Close()
continue
}
if !c.ping_sent && c.timestamp.Add(PING_THRESHOLD).Before(now) {
if c.registered {
c.Msg("PING :" + daemon.hostname)
c.ping_sent = true
} else {
log.Println(c, "ping timeout")
c.conn.Close()
}
}
}
daemon.last_aliveness_check = now
}
client := event.client
switch event.event_type {
case EVENT_NEW:
daemon.clients[client] = true
case EVENT_DEL:
delete(daemon.clients, client)
for _, room_sink := range daemon.room_sinks {
room_sink <- event
}
case EVENT_MSG:
cols := strings.SplitN(event.text, " ", 2)
command := strings.ToUpper(cols[0])
log.Println(client, "command", command)
if command == "QUIT" {
delete(daemon.clients, client)
client.conn.Close()
continue
}
if !client.registered {
go daemon.ClientRegister(client, command, cols)
continue
}
switch command {
case "AWAY":
continue
case "JOIN":
if len(cols) == 1 || len(cols[1]) < 1 {
client.ReplyNotEnoughParameters("JOIN")
continue
}
go daemon.HandlerJoin(client, cols[1])
case "LIST":
daemon.SendList(client, cols)
case "LUSERS":
go daemon.SendLusers(client)
case "MODE":
if len(cols) == 1 || len(cols[1]) < 1 {
client.ReplyNotEnoughParameters("MODE")
continue
}
cols = strings.SplitN(cols[1], " ", 2)
if cols[0] == client.username {
if len(cols) == 1 {
client.Msg("221 " + client.nickname + " +")
} else {
client.ReplyNicknamed("501", "Unknown MODE flag")
}
continue
}
room, _ := RoomNameSanitize(cols[0])
r, found := daemon.rooms[room]
if !found {
client.ReplyNoChannel(room)
continue
}
if len(cols) == 1 {
daemon.room_sinks[r] <- ClientEvent{client, EVENT_MODE, ""}
} else {
daemon.room_sinks[r] <- ClientEvent{client, EVENT_MODE, cols[1]}
}
case "MOTD":
go daemon.SendMotd(client)
case "PART":
if len(cols) == 1 || len(cols[1]) < 1 {
client.ReplyNotEnoughParameters("PART")
continue
}
for _, room := range strings.Split(cols[1], ",") {
room, _ = RoomNameSanitize(room)
r, found := daemon.rooms[room]
if !found {
client.ReplyNoChannel(room)
}
daemon.room_sinks[r] <- ClientEvent{client, EVENT_DEL, ""}
}
case "PING":
if len(cols) == 1 {
client.ReplyNicknamed("409", "No origin specified")
continue
}
client.Reply(fmt.Sprintf("PONG %s :%s", daemon.hostname, cols[1]))
case "PONG":
continue
case "NOTICE", "PRIVMSG":
if len(cols) == 1 {
client.ReplyNicknamed("411", "No recipient given")
continue
}
cols = strings.SplitN(cols[1], " ", 2)
if len(cols) == 1 {
client.ReplyNicknamed("412", "No text to send")
continue
}
msg := ""
target := strings.ToLower(cols[0])
for c := range daemon.clients {
if c.nickname == target {
msg = fmt.Sprintf(":%s %s %s :%s", client, command, c.nickname, cols[1])
c.Msg(msg)
break
}
}
if msg != "" {
continue
}
target, _ = RoomNameSanitize(target)
r, found := daemon.rooms[target]
if !found {
client.ReplyNicknamed("401", target, "No such nickname/channel")
}
daemon.room_sinks[r] <- ClientEvent{client, EVENT_MSG, command + " " + strings.TrimLeft(cols[1], ":")}
case "TOPIC":
if len(cols) == 1 {
client.ReplyNotEnoughParameters("TOPIC")
continue
}
cols = strings.SplitN(cols[1], " ", 2)
room, _ := RoomNameSanitize(cols[0])
r, found := daemon.rooms[room]
if !found {
client.ReplyNoChannel(room)
}
var change string
if len(cols) > 1 {
change = cols[1]
} else {
change = ""
}
daemon.room_sinks[r] <- ClientEvent{client, EVENT_TOPIC, change}
case "WHO":
if len(cols) == 1 || len(cols[1]) < 1 {
client.ReplyNotEnoughParameters("WHO")
continue
}
room, _ := RoomNameSanitize(strings.Split(cols[1], " ")[0])
r, found := daemon.rooms[room]
if !found {
client.ReplyNoChannel(room)
}
daemon.room_sinks[r] <- ClientEvent{client, EVENT_WHO, ""}
case "WHOIS":
if len(cols) == 1 || len(cols[1]) < 1 {
client.ReplyNotEnoughParameters("WHOIS")
continue
}
cols := strings.Split(cols[1], " ")
nicknames := strings.Split(cols[len(cols)-1], ",")
go daemon.SendWhois(client, nicknames)
default:
client.ReplyNicknamed("421", command, "Unknown command")
}
}
}
}

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/*
goircd -- minimalistic simple Internet Relay Chat (IRC) server
Copyright (C) 2014 Sergey Matveev <stargrave@stargrave.org>
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
package main
import (
"fmt"
"io/ioutil"
"os"
"strings"
"testing"
"time"
)
func TestRegistrationWorkflow(t *testing.T) {
daemon := NewDaemon("foohost", "", nil, nil)
events := make(chan ClientEvent)
go daemon.Processor(events)
conn := NewTestingConn()
client := NewClient("foohost", conn)
events <- ClientEvent{client, EVENT_NEW, ""}
events <- ClientEvent{client, EVENT_MSG, "UNEXISTENT CMD"}
time.Sleep(100)
if len(conn.incoming) > 0 {
t.Fail()
}
events <- ClientEvent{client, EVENT_MSG, "NICK"}
time.Sleep(100)
if (len(conn.incoming) != 1) || (conn.incoming[0] != ":foohost 431 :No nickname given\r\n") {
t.Fail()
}
events <- ClientEvent{client, EVENT_MSG, "NICK meinick"}
time.Sleep(100)
if (len(conn.incoming) != 1) || (client.nickname != "meinick") || client.registered {
t.Fail()
}
events <- ClientEvent{client, EVENT_MSG, "USER"}
time.Sleep(100)
if (len(conn.incoming) != 2) || (conn.incoming[1] != ":foohost 461 meinick USER :Not enough parameters\r\n") {
t.Fail()
}
events <- ClientEvent{client, EVENT_MSG, "USER 1 2 3"}
time.Sleep(100)
if (len(conn.incoming) != 3) || (conn.incoming[2] != ":foohost 461 meinick USER :Not enough parameters\r\n") {
t.Fail()
}
daemon.SendLusers(client)
if !strings.Contains(conn.incoming[len(conn.incoming)-1], "There are 0 users") {
t.Fail()
}
events <- ClientEvent{client, EVENT_MSG, "USER 1 2 3 :4 5"}
time.Sleep(100)
if (len(conn.incoming) < 4) || (client.username != "1") || (client.realname != "4 5") {
t.Fail()
}
statuses := map[int]bool{1: false, 2: false, 3: false, 4: false, 251: false, 422: false}
for _, msg := range conn.incoming {
for k, _ := range statuses {
if strings.HasPrefix(msg, fmt.Sprintf(":foohost %03d", k)) {
statuses[k] = true
}
}
}
for _, v := range statuses {
if !v {
t.Fail()
}
}
if !client.registered {
t.Fail()
}
events <- ClientEvent{client, EVENT_MSG, "UNEXISTENT CMD"}
time.Sleep(100)
if conn.incoming[len(conn.incoming)-1] != ":foohost 421 meinick UNEXISTENT :Unknown command\r\n" {
t.Fail()
}
events <- ClientEvent{client, EVENT_MSG, "AWAY"}
time.Sleep(100)
if conn.incoming[len(conn.incoming)-1] == ":foohost 421 meinick AWAY :Unknown command\r\n" {
t.Fail()
}
daemon.SendLusers(client)
if !strings.Contains(conn.incoming[len(conn.incoming)-1], "There are 1 users") {
t.Fail()
}
events <- ClientEvent{client, EVENT_MSG, "QUIT"}
time.Sleep(100)
if !conn.closed {
t.Fail()
}
}
func TestMotd(t *testing.T) {
fd, err := ioutil.TempFile("", "motd")
if err != nil {
t.Fatal("can not create temporary file")
}
defer os.Remove(fd.Name())
fd.Write([]byte("catched\n"))
daemon := NewDaemon("foohost", fd.Name(), nil, nil)
conn := NewTestingConn()
client := NewClient("foohost", conn)
daemon.SendMotd(client)
catched := false
for _, msg := range conn.incoming {
if strings.Contains(msg, "372 * :- catched") {
catched = true
}
}
if !catched {
t.Fail()
}
}

109
events.go Normal file
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/*
goircd -- minimalistic simple Internet Relay Chat (IRC) server
Copyright (C) 2014 Sergey Matveev <stargrave@stargrave.org>
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
package main
import (
"fmt"
"log"
"os"
"path"
"time"
)
const (
EVENT_NEW = iota
EVENT_DEL = iota
EVENT_MSG = iota
EVENT_TOPIC = iota
EVENT_WHO = iota
EVENT_MODE = iota
FORMAT_MSG = "[%s] <%s> %s\n"
FORMAT_META = "[%s] * %s %s\n"
)
// Client events going from each of client
// They can be either NEW, DEL or unparsed MSG
type ClientEvent struct {
client *Client
event_type int
text string
}
func (m ClientEvent) String() string {
return string(m.event_type) + ": " + m.client.String() + ": " + m.text
}
// Logging in-room events
// Intended to tell when, where and who send a message or meta command
type LogEvent struct {
where string
who string
what string
meta bool
}
// Logging events logger itself
// Each room's events are written to separate file in logdir
// Events include messages, topic and keys changes, joining and leaving
func Logger(logdir string, events chan LogEvent) {
mode := os.O_CREATE | os.O_WRONLY | os.O_APPEND
perm := os.FileMode(0660)
var format string
for event := range events {
logfile := path.Join(logdir, event.where)
fd, err := os.OpenFile(logfile, mode, perm)
if err != nil {
log.Println("Can not open logfile", logfile, err)
continue
}
if event.meta {
format = FORMAT_META
} else {
format = FORMAT_MSG
}
_, err = fd.WriteString(fmt.Sprintf(format, time.Now(), event.who, event.what))
fd.Close()
if err != nil {
log.Println("Error writing to logfile", logfile, err)
}
}
}
type StateEvent struct {
where string
topic string
key string
}
// Room state events saver
// Room states shows that either topic or key has been changed
// Each room's state is written to separate file in statedir
func StateKeeper(statedir string, events chan StateEvent) {
mode := os.O_CREATE | os.O_TRUNC | os.O_WRONLY
perm := os.FileMode(0660)
for event := range events {
state_path := path.Join(statedir, event.where)
fd, err := os.OpenFile(state_path, mode, perm)
if err != nil {
log.Println("Can not open statefile", state_path, err)
continue
}
fd.WriteString(event.topic + "\n" + event.key + "\n")
fd.Close()
}
}

121
goircd.go Normal file
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/*
goircd -- minimalistic simple Internet Relay Chat (IRC) server
Copyright (C) 2014 Sergey Matveev <stargrave@stargrave.org>
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
package main
import (
"bytes"
"flag"
"log"
"net"
"os"
"path"
"path/filepath"
"strings"
)
var (
hostname = flag.String("hostname", "localhost", "Hostname")
bind = flag.String("bind", ":6667", "Address to bind to")
motd = flag.String("motd", "", "Path to MOTD file")
logdir = flag.String("logdir", "", "Absolute path to directory for logs")
statedir = flag.String("statedir", "", "Absolute path to directory for states")
)
func Run() {
var client *Client
events := make(chan ClientEvent)
log.SetFlags(log.Ldate | log.Lmicroseconds | log.Lshortfile)
log_sink := make(chan LogEvent)
if *logdir == "" {
// Dummy logger
go func() {
for {
<-log_sink
}
}()
} else {
if !path.IsAbs(*logdir) {
log.Fatalln("Need absolute path for logdir")
return
}
go Logger(*logdir, log_sink)
log.Println(*logdir, "logger initialized")
}
state_sink := make(chan StateEvent)
daemon := NewDaemon(*hostname, *motd, log_sink, state_sink)
if *statedir == "" {
// Dummy statekeeper
go func() {
for {
<-state_sink
}
}()
} else {
if !path.IsAbs(*statedir) {
log.Fatalln("Need absolute path for statedir")
}
states, err := filepath.Glob(*statedir + "/#*")
if err != nil {
log.Fatalln("Can not read statedir", err)
}
for _, state := range states {
fd, err := os.Open(state)
if err != nil {
log.Fatalln("Can not open state", state, err)
}
buf := make([]byte, 1024)
_, err = fd.Read(buf)
fd.Close()
if err != nil {
log.Fatalln("Can not read state", state, err)
}
room, _ := daemon.RoomRegister(path.Base(state))
buf = bytes.TrimRight(buf, "\x00")
contents := strings.Split(string(buf), "\n")
room.topic = contents[0]
room.key = contents[1]
log.Println("Loaded state for room", room.name)
}
go StateKeeper(*statedir, state_sink)
log.Println(*statedir, "statekeeper initialized")
}
listener, err := net.Listen("tcp", *bind)
if err != nil {
log.Fatalln("Can not listen on ", *bind)
}
log.Println("Listening on", *bind)
go daemon.Processor(events)
for {
conn, err := listener.Accept()
if err != nil {
log.Println("Error during accepting connection", err)
continue
}
client = NewClient(*hostname, conn)
go client.Processor(events)
}
}
func main() {
flag.Parse()
Run()
}

168
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/*
goircd -- minimalistic simple Internet Relay Chat (IRC) server
Copyright (C) 2014 Sergey Matveev <stargrave@stargrave.org>
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
package main
import (
"fmt"
"log"
"regexp"
"sort"
"strings"
)
// Sanitize room's name. It can consist of 1 to 50 ASCII symbols
// with some exclusions. All room names will have "#" prefix.
func RoomNameSanitize(name string) (n string, valid bool) {
n = strings.TrimLeft(strings.ToLower(name), "&#+!")
valid, _ = regexp.MatchString("^[^\x00\x07\x0a\x0d ,:/]{1,50}$", n)
return "#" + n, valid
}
type Room struct {
name string
topic string
key string
members map[*Client]bool
hostname string
log_sink chan LogEvent
state_sink chan StateEvent
}
func NewRoom(hostname, name string, log_sink chan LogEvent, state_sink chan StateEvent) *Room {
room := Room{name: name}
room.members = make(map[*Client]bool)
room.topic = ""
room.key = ""
room.hostname = hostname
room.log_sink = log_sink
room.state_sink = state_sink
return &room
}
func (room *Room) SendTopic(client *Client) {
if room.topic == "" {
client.ReplyNicknamed("331", room.name, "No topic is set")
} else {
client.ReplyNicknamed("332", room.name, room.topic)
}
}
// Send message to all room's subscribers, possibly excluding someone
func (room *Room) Broadcast(msg string, client_to_ignore ...*Client) {
for member := range room.members {
if (len(client_to_ignore) > 0) && member == client_to_ignore[0] {
continue
}
member.Msg(msg)
}
}
func (room *Room) StateSave() {
room.state_sink <- StateEvent{room.name, room.topic, room.key}
}
func (room *Room) Processor(events chan ClientEvent) {
var client *Client
for event := range events {
client = event.client
switch event.event_type {
case EVENT_NEW:
room.members[client] = true
log.Println(client, "joined", room.name)
room.SendTopic(client)
go room.Broadcast(fmt.Sprintf(":%s JOIN %s", client, room.name))
room.log_sink <- LogEvent{room.name, client.nickname, "joined", true}
nicknames := []string{}
for member := range room.members {
nicknames = append(nicknames, member.nickname)
}
sort.Strings(nicknames)
client.ReplyNicknamed("353", "=", room.name, strings.Join(nicknames, " "))
client.ReplyNicknamed("366", room.name, "End of NAMES list")
case EVENT_DEL:
if _, subscribed := room.members[client]; !subscribed {
client.ReplyNicknamed("442", room.name, "You are not on that channel")
continue
}
delete(room.members, client)
msg := fmt.Sprintf(":%s PART %s :%s", client, room.name, client.nickname)
go room.Broadcast(msg)
room.log_sink <- LogEvent{room.name, client.nickname, "left", true}
case EVENT_TOPIC:
if _, subscribed := room.members[client]; !subscribed {
client.ReplyParts("442", room.name, "You are not on that channel")
continue
}
if event.text == "" {
go room.SendTopic(client)
continue
}
room.topic = strings.TrimLeft(event.text, ":")
msg := fmt.Sprintf(":%s TOPIC %s :%s", client, room.name, room.topic)
go room.Broadcast(msg)
room.log_sink <- LogEvent{room.name, client.nickname, "set topic to " + room.topic, true}
room.StateSave()
case EVENT_WHO:
for m := range room.members {
client.ReplyNicknamed("352", room.name, m.username, m.conn.RemoteAddr().String(), room.hostname, m.nickname, "H", "0 "+m.realname)
}
client.ReplyNicknamed("315", room.name, "End of WHO list")
case EVENT_MODE:
if event.text == "" {
mode := "+"
if room.key != "" {
mode = mode + "k"
}
client.Msg(fmt.Sprintf("324 %s %s %s", client.nickname, room.name, mode))
continue
}
if strings.HasPrefix(event.text, "-k") || strings.HasPrefix(event.text, "+k") {
if _, subscribed := room.members[client]; !subscribed {
client.ReplyParts("442", room.name, "You are not on that channel")
continue
}
} else {
client.ReplyNicknamed("472", event.text, "Unknown MODE flag")
continue
}
var msg string
var msg_log string
if strings.HasPrefix(event.text, "+k") {
cols := strings.Split(event.text, " ")
if len(cols) == 1 {
client.ReplyNotEnoughParameters("MODE")
continue
}
room.key = cols[1]
msg = fmt.Sprintf(":%s MODE %s +k %s", client, room.name, room.key)
msg_log = "set channel key to " + room.key
} else if strings.HasPrefix(event.text, "-k") {
room.key = ""
msg = fmt.Sprintf(":%s MODE %s -k", client, room.name)
msg_log = "removed channel key"
}
go room.Broadcast(msg)
room.log_sink <- LogEvent{room.name, client.nickname, msg_log, true}
room.StateSave()
case EVENT_MSG:
sep := strings.Index(event.text, " ")
go room.Broadcast(fmt.Sprintf(":%s %s %s :%s", client, event.text[:sep], room.name, event.text[sep+1:]), client)
room.log_sink <- LogEvent{room.name, client.nickname, event.text[sep+1:], false}
}
}
}