From b2f90fb412218973608b24a32eebadc60de9878a Mon Sep 17 00:00:00 2001 From: Sergey Matveev Date: Sun, 11 May 2014 20:18:55 +0400 Subject: [PATCH] Initial commit --- AUTHORS | 1 + COPYING | 674 +++++++++++++++++++++++++++++++++++++++++++++++++ INSTALL | 12 + README | 68 +++++ TODO | 1 + client.go | 119 +++++++++ client_test.go | 148 +++++++++++ daemon.go | 433 +++++++++++++++++++++++++++++++ daemon_test.go | 140 ++++++++++ events.go | 109 ++++++++ goircd.go | 121 +++++++++ room.go | 168 ++++++++++++ 12 files changed, 1994 insertions(+) create mode 100644 AUTHORS create mode 100644 COPYING create mode 100644 INSTALL create mode 100644 README create mode 100644 TODO create mode 100644 client.go create mode 100644 client_test.go create mode 100644 daemon.go create mode 100644 daemon_test.go create mode 100644 events.go create mode 100644 goircd.go create mode 100644 room.go diff --git a/AUTHORS b/AUTHORS new file mode 100644 index 0000000..f047789 --- /dev/null +++ b/AUTHORS @@ -0,0 +1 @@ +* Sergey Matveev diff --git a/COPYING b/COPYING new file mode 100644 index 0000000..9a2708d --- /dev/null +++ b/COPYING @@ -0,0 +1,674 @@ + GNU GENERAL PUBLIC LICENSE + Version 3, 29 June 2007 + + Copyright (C) 2007 Free Software Foundation, Inc. + Everyone is permitted to copy and distribute verbatim copies + of this license document, but changing it is not allowed. + + Preamble + + The GNU General Public License is a free, copyleft license for +software and other kinds of works. + + The licenses for most software and other practical works are designed +to take away your freedom to share and change the works. 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If not, see . + +Also add information on how to contact you by electronic and paper mail. + + If the program does terminal interaction, make it output a short +notice like this when it starts in an interactive mode: + + Copyright (C) + This program comes with ABSOLUTELY NO WARRANTY; for details type `show w'. + This is free software, and you are welcome to redistribute it + under certain conditions; type `show c' for details. + +The hypothetical commands `show w' and `show c' should show the appropriate +parts of the General Public License. Of course, your program's commands +might be different; for a GUI interface, you would use an "about box". + + You should also get your employer (if you work as a programmer) or school, +if any, to sign a "copyright disclaimer" for the program, if necessary. +For more information on this, and how to apply and follow the GNU GPL, see +. + + The GNU General Public License does not permit incorporating your program +into proprietary programs. If your program is a subroutine library, you +may consider it more useful to permit linking proprietary applications with +the library. If this is what you want to do, use the GNU Lesser General +Public License instead of this License. But first, please read +. diff --git a/INSTALL b/INSTALL new file mode 100644 index 0000000..b73f970 --- /dev/null +++ b/INSTALL @@ -0,0 +1,12 @@ +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. diff --git a/README b/README new file mode 100644 index 0000000..b0082f0 --- /dev/null +++ b/README @@ -0,0 +1,68 @@ + 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. diff --git a/TODO b/TODO new file mode 100644 index 0000000..b9f7192 --- /dev/null +++ b/TODO @@ -0,0 +1 @@ +* Cover all available commands with unittests diff --git a/client.go b/client.go new file mode 100644 index 0000000..632bf1f --- /dev/null +++ b/client.go @@ -0,0 +1,119 @@ +/* +goircd -- minimalistic simple Internet Relay Chat (IRC) server +Copyright (C) 2014 Sergey Matveev + +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 . +*/ +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") +} diff --git a/client_test.go b/client_test.go new file mode 100644 index 0000000..101de56 --- /dev/null +++ b/client_test.go @@ -0,0 +1,148 @@ +/* +goircd -- minimalistic simple Internet Relay Chat (IRC) server +Copyright (C) 2014 Sergey Matveev + +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 . +*/ +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") + } +} diff --git a/daemon.go b/daemon.go new file mode 100644 index 0000000..7263db7 --- /dev/null +++ b/daemon.go @@ -0,0 +1,433 @@ +/* +goircd -- minimalistic simple Internet Relay Chat (IRC) server +Copyright (C) 2014 Sergey Matveev + +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 . +*/ +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") + } + } + } +} diff --git a/daemon_test.go b/daemon_test.go new file mode 100644 index 0000000..b5f6580 --- /dev/null +++ b/daemon_test.go @@ -0,0 +1,140 @@ +/* +goircd -- minimalistic simple Internet Relay Chat (IRC) server +Copyright (C) 2014 Sergey Matveev + +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 . +*/ +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() + } +} diff --git a/events.go b/events.go new file mode 100644 index 0000000..6fdf1e7 --- /dev/null +++ b/events.go @@ -0,0 +1,109 @@ +/* +goircd -- minimalistic simple Internet Relay Chat (IRC) server +Copyright (C) 2014 Sergey Matveev + +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 . +*/ +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() + } +} diff --git a/goircd.go b/goircd.go new file mode 100644 index 0000000..824b5f0 --- /dev/null +++ b/goircd.go @@ -0,0 +1,121 @@ +/* +goircd -- minimalistic simple Internet Relay Chat (IRC) server +Copyright (C) 2014 Sergey Matveev + +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 . +*/ +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() +} diff --git a/room.go b/room.go new file mode 100644 index 0000000..f58d708 --- /dev/null +++ b/room.go @@ -0,0 +1,168 @@ +/* +goircd -- minimalistic simple Internet Relay Chat (IRC) server +Copyright (C) 2014 Sergey Matveev + +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 . +*/ +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} + } + } +} -- 2.44.0