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goircd
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Many fixes and additions 

* NAMES and WALLOPS command
* -cloak option
* -v renamed to -verbose
* -passwords renamed to -passwd
* -debug option prints traffic messages
* without -verbose only startup/shutdown and error messages are printed
* -timestamped option provides timestamps in printed messages, as
  earlier. No timestamps is useful for running under daemontools
* passwords are stored in SHA256-hashed format
* state files replaced with state directory with files
* removed many unnecessary pointers and locks
* graceful shutdown with all clients notification
* fixed time structure printing in log files, instead of short human
  readable timestamp
* PART is sent to the user itself, to notify his client about leaving
* log messages are printed to stdout, instead of stderr, for
  friendliness with daemontools logger
* ability to configure newly created directories and files with
  -perm-state-dir, -perm-state-file, -perm-log-file
This commit is contained in:
Sergey Matveev 2020-11-06 20:10:06 +03:00
parent def58d0f49
commit b7fb219307
13 changed files with 998 additions and 872 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

7
INSTALL
View File

@ -1,8 +1,9 @@
goircd requires only standard Go's libraries and consists of single main
package. You can install it like either:
package. You can install it like that:
* with: go get go.cypherpunks.ru/goircd
* or manually:
$ go get go.cypherpunks.ru/goircd
or manually:
$ git clone git://git.cypherpunks.ru/goircd.git
$ cd goircd

40
README
View File

@ -10,7 +10,7 @@ It does not aim 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 no support for channel operators, modes, votes, invites
* There is no support for channel operators, many modes, votes, invites
* No ident lookups
But it has some convincing features:
@ -19,8 +19,8 @@ But it has some convincing features:
* Single executable binary
* No configuration file, just few command line arguments
* IPv6 out-of-box support
* Ability to listen on TLS-capable ports
* Optional channel logging to plain text files
* Ability to additionally listen on TLS-capable ports
* Optional channels 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)
@ -28,15 +28,16 @@ But it has some convincing features:
Some remarks and recommendations related to it's simplicity:
* Use either nohup or similar tools to daemonize it
* Just plain logging on stderr, without syslog support
* Use daemontools to daemonize, setuid/gid it
* Just plaintext logging to stdout, without syslog support -- use
daemontool's multilog
SUPPORTED IRC COMMANDS
* PASS/NICK/USER during registration workflow
* PING/PONGs
* NOTICE/PRIVMSG, ISON
* AWAY, MOTD, LUSERS, WHO, WHOIS, VERSION, QUIT
* AWAY, MOTD, LUSERS, NAMES, WHO, WHOIS, VERSION, WALLOPS, QUIT
* LIST, JOIN, TOPIC, +k/-k channel MODE
USAGE
@ -45,6 +46,7 @@ Just execute goircd daemon. It has following optional arguments:
-hostname: hostname to show for client's connections
-bind: address to bind to (:6667 by default)
-cloak: cloak user's host with the given hostname
-motd: absolute path to MOTD file. It is reread every time
MOTD is requested
-logdir: directory where all channels messages will be saved. If
@ -53,10 +55,15 @@ Just execute goircd daemon. It has following optional arguments:
loaded during startup. If omitted, then states will be
lost after daemon termination
-tlsbind: enable TLS, specify address to listen on and path
-tlspem to PEM file with certificate and private key
-passwords: enable client authentication and specify path to
-tlspem: to PEM file with certificate and private key
-passwd: enable client authentication and specify path to
passwords file
-v: increase verbosity
-timestamped: enabled timestamps for stderr messages
-verbose: increase verbosity
-debug: also show traffic messages
-perm-state-dir: permission (before umask) for newly created state directory
-perm-state-file: permission (before umask) for newly created state file
-perm-log-file: permission (before umask) for newly created log file
TLS
@ -69,10 +76,12 @@ AUTHENTICATION
You can turn on optional client authentication by preparing passwords
file and using the -passwords argument. Format of passwords file is:
login1:password1\n
login2:password2\n
login1:hex(sha256(password1))\n
login2:hex(sha256(password2))\n
...
You can get hashed password value using: echo -n password | sha256
LOG FILES
Log files are not opened all the time, but only during each message
@ -80,13 +89,8 @@ saving. That is why you can safely rename them for rotation purposes.
STATE FILES
Each state file has the name equals to room's one. It contains two plain
text lines: room's topic and room's authentication key (empty if none
specified). For example:
$ cat states/meinroom
This is meinroom's topic
secretkey
Room's state is created/saved when either topic or key is set. State is
a directory (room's name) with "topic" and "key" plaintext files.
LICENCE

1
clean.do Normal file
View File

@ -0,0 +1 @@
rm -f goircd

359
client.go
View File

@ -19,8 +19,15 @@ package main
import (
"bytes"
"crypto/sha256"
"crypto/subtle"
"encoding/hex"
"fmt"
"io/ioutil"
"log"
"net"
"regexp"
"sort"
"strings"
"sync"
"time"
@ -28,29 +35,37 @@ import (
const (
BufSize = 1500
MaxOutBuf = 1 << 12
MaxOutBuf = 128
)
var (
CRLF []byte = []byte{'\x0d', '\x0a'}
RENickname = regexp.MustCompile("^[a-zA-Z0-9-]{1,24}$")
clients map[*Client]struct{} = make(map[*Client]struct{})
clientsLock sync.RWMutex
clientsWG sync.WaitGroup
)
type Client struct {
conn net.Conn
registered bool
nickname *string
username *string
realname *string
password *string
away *string
nickname string
username string
realname string
password string
away string
recvTimestamp time.Time
sendTimestamp time.Time
outBuf chan *string
outBuf chan string
alive bool
sync.Mutex
}
func (c *Client) Host() string {
if *cloak != "" {
return *cloak
}
addr := c.conn.RemoteAddr().String()
if host, _, err := net.SplitHostPort(addr); err == nil {
addr = host
@ -62,48 +77,42 @@ func (c *Client) Host() string {
}
func (c *Client) String() string {
return *c.nickname + "!" + *c.username + "@" + c.Host()
return strings.Join([]string{c.nickname, "!", c.username, "@", c.Host()}, "")
}
func NewClient(conn net.Conn) *Client {
nickname := "*"
username := ""
func NewClient(conn net.Conn, events chan ClientEvent) *Client {
c := Client{
conn: conn,
nickname: &nickname,
username: &username,
nickname: "*",
username: "",
recvTimestamp: time.Now(),
sendTimestamp: time.Now(),
alive: true,
outBuf: make(chan *string, MaxOutBuf),
outBuf: make(chan string, MaxOutBuf),
}
clientsWG.Add(2)
go c.MsgSender()
go c.Processor(events)
return &c
}
func (c *Client) SetDead() {
c.outBuf <- nil
c.alive = false
}
func (c *Client) Close() {
c.Lock()
if c.alive {
c.SetDead()
close(c.outBuf)
c.alive = false
}
c.Unlock()
}
// 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 (c *Client) Processor(sink chan ClientEvent) {
sink <- ClientEvent{c, EventNew, ""}
log.Println(c, "New client")
func (c *Client) Processor(events chan ClientEvent) {
events <- ClientEvent{c, EventNew, ""}
if *verbose {
log.Println(c, "connected")
}
buf := make([]byte, BufSize*2)
var n int
var prev int
var i int
var n, prev, i int
var msg string
var err error
for {
if prev == BufSize {
@ -120,26 +129,43 @@ func (c *Client) Processor(sink chan ClientEvent) {
if i == -1 {
continue
}
sink <- ClientEvent{c, EventMsg, string(buf[:i])}
if *debug {
log.Println(c, "<-", msg)
}
msg = string(buf[:i])
if *debug {
log.Println(c, "->", msg)
}
events <- ClientEvent{c, EventMsg, msg}
copy(buf, buf[i+2:prev])
prev -= (i + 2)
goto CheckMore
}
c.Close()
sink <- ClientEvent{c, EventDel, ""}
if *verbose {
log.Println(c, "disconnected")
}
events <- ClientEvent{c, EventDel, ""}
clientsWG.Done()
}
func (c *Client) MsgSender() {
var err error
for msg := range c.outBuf {
if msg == nil {
c.conn.Close()
if *debug {
log.Println(c, "<-", msg)
}
if _, err = c.conn.Write(append([]byte(msg), CRLF...)); err != nil {
if *verbose {
log.Println(c, "error writing", err)
}
break
}
c.conn.Write(append([]byte(*msg), CRLF...))
}
c.conn.Close()
clientsWG.Done()
}
// Send message as is with CRLF appended.
func (c *Client) Msg(text string) {
c.Lock()
defer c.Unlock()
@ -149,20 +175,18 @@ func (c *Client) Msg(text string) {
if len(c.outBuf) == MaxOutBuf {
log.Println(c, "output buffer size exceeded, kicking him")
if c.alive {
c.SetDead()
close(c.outBuf)
c.alive = false
}
return
}
c.outBuf <- &text
c.outBuf <- text
}
// Send message from server. It has ": servername" prefix.
func (c *Client) Reply(text string) {
c.Msg(":" + *hostname + " " + text)
}
// Send server message, concatenating all provided text parts and
// prefix the last one with ":".
func (c *Client) ReplyParts(code string, text ...string) {
parts := []string{code}
for _, t := range text {
@ -172,18 +196,14 @@ func (c *Client) ReplyParts(code string, text ...string) {
c.Reply(strings.Join(parts, " "))
}
// Send nicknamed server message. After servername it always has target
// client's nickname. The last part is prefixed with ":".
func (c *Client) ReplyNicknamed(code string, text ...string) {
c.ReplyParts(code, append([]string{*c.nickname}, text...)...)
c.ReplyParts(code, append([]string{c.nickname}, text...)...)
}
// Reply "461 not enough parameters" error for given command.
func (c *Client) ReplyNotEnoughParameters(command string) {
c.ReplyNicknamed("461", command, "Not enough parameters")
}
// Reply "403 no such channel" error for specified channel.
func (c *Client) ReplyNoChannel(channel string) {
c.ReplyNicknamed("403", channel, "No such channel")
}
@ -191,3 +211,252 @@ func (c *Client) ReplyNoChannel(channel string) {
func (c *Client) ReplyNoNickChan(channel string) {
c.ReplyNicknamed("401", channel, "No such nick/channel")
}
func (c *Client) SendLusers() {
lusers := 0
clientsLock.RLock()
for client := range clients {
if client.registered {
lusers++
}
}
clientsLock.RUnlock()
c.ReplyNicknamed(
"251",
fmt.Sprintf("There are %d users and 0 invisible on 1 servers",
lusers,
))
}
func (c *Client) SendMotd() {
if motd == nil {
c.ReplyNicknamed("422", "MOTD File is missing")
return
}
motdText, err := ioutil.ReadFile(*motd)
if err != nil {
log.Printf("can not read motd file %s: %v", *motd, err)
c.ReplyNicknamed("422", "Error reading MOTD File")
return
}
c.ReplyNicknamed("375", "- "+*hostname+" Message of the day -")
for _, s := range strings.Split(strings.TrimSuffix(string(motdText), "\n"), "\n") {
c.ReplyNicknamed("372", "- "+s)
}
c.ReplyNicknamed("376", "End of /MOTD command")
}
func (c *Client) Join(cmd string) {
args := strings.Split(cmd, " ")
rs := strings.Split(args[0], ",")
keys := []string{}
if len(args) > 1 {
keys = strings.Split(args[1], ",")
}
RoomCycle:
for n, roomName := range rs {
if !RERoom.MatchString(roomName) {
c.ReplyNoChannel(roomName)
continue
}
var key string
if (n < len(keys)) && (keys[n] != "") {
key = keys[n]
}
roomsLock.RLock()
for roomNameExisting, room := range rooms {
if roomName != roomNameExisting {
continue
}
if (room.key != "") && (room.key != key) {
c.ReplyNicknamed("475", roomName, "Cannot join channel (+k)")
roomsLock.RUnlock()
return
}
room.events <- ClientEvent{c, EventNew, ""}
roomsLock.RUnlock()
continue RoomCycle
}
roomsLock.RUnlock()
roomNew := RoomRegister(roomName)
if *verbose {
log.Println("room", roomName, "created")
}
if key != "" {
roomNew.key = key
roomNew.StateSave()
}
roomNew.events <- ClientEvent{c, EventNew, ""}
}
}
func (client *Client) SendWhois(nicknames []string) {
var c *Client
for _, nickname := range nicknames {
nickname = strings.ToLower(nickname)
clientsLock.RLock()
for c = range clients {
if strings.ToLower(c.nickname) == nickname {
clientsLock.RUnlock()
goto Found
}
}
clientsLock.RUnlock()
client.ReplyNoNickChan(nickname)
continue
Found:
var host string
if *cloak != "" {
host = *cloak
} else {
host, _, err := net.SplitHostPort(c.conn.RemoteAddr().String())
if err != nil {
log.Printf("can't parse RemoteAddr %q: %v", host, err)
host = "Unknown"
}
}
client.ReplyNicknamed("311", c.nickname, c.username, host, "*", c.realname)
client.ReplyNicknamed("312", c.nickname, *hostname, *hostname)
if c.away != "" {
client.ReplyNicknamed("301", c.nickname, c.away)
}
subscriptions := make([]string, 0)
roomsLock.RLock()
for _, room := range rooms {
for subscriber := range room.members {
if subscriber.nickname == nickname {
subscriptions = append(subscriptions, room.name)
}
}
}
roomsLock.RUnlock()
sort.Strings(subscriptions)
client.ReplyNicknamed("319", c.nickname, strings.Join(subscriptions, " "))
client.ReplyNicknamed("318", c.nickname, "End of /WHOIS list")
}
}
func (c *Client) SendList(cols []string) {
var rs []string
if (len(cols) > 1) && (cols[1] != "") {
rs = strings.Split(strings.Split(cols[1], " ")[0], ",")
} else {
rs = make([]string, 0)
roomsLock.RLock()
for r := range rooms {
rs = append(rs, r)
}
roomsLock.RUnlock()
}
sort.Strings(rs)
roomsLock.RLock()
for _, r := range rs {
if room, found := rooms[r]; found {
c.ReplyNicknamed(
"322",
r,
fmt.Sprintf("%d", len(room.members)),
room.topic,
)
}
}
roomsLock.RUnlock()
c.ReplyNicknamed("323", "End of /LIST")
}
func (c *Client) Register(cmd string, cols []string) {
switch cmd {
case "PASS":
if len(cols) == 1 || len(cols[1]) < 1 {
c.ReplyNotEnoughParameters("PASS")
return
}
password := strings.TrimPrefix(cols[1], ":")
c.password = password
case "NICK":
if len(cols) == 1 || len(cols[1]) < 1 {
c.ReplyParts("431", "No nickname given")
return
}
nickname := cols[1]
// Compatibility with some clients prepending colons to nickname
nickname = strings.TrimPrefix(nickname, ":")
nickname = strings.ToLower(nickname)
if !RENickname.MatchString(nickname) {
c.ReplyParts("432", "*", cols[1], "Erroneous nickname")
return
}
clientsLock.RLock()
for existingClient := range clients {
if existingClient.nickname == nickname {
clientsLock.RUnlock()
c.ReplyParts("433", "*", nickname, "Nickname is already in use")
return
}
}
clientsLock.RUnlock()
c.nickname = nickname
case "USER":
if len(cols) == 1 {
c.ReplyNotEnoughParameters("USER")
return
}
args := strings.SplitN(cols[1], " ", 4)
if len(args) < 4 {
c.ReplyNotEnoughParameters("USER")
return
}
c.username = args[0]
realname := strings.TrimLeft(args[3], ":")
c.realname = realname
}
if c.nickname != "*" && c.username != "" {
if *passwords != "" {
authenticated := false
if c.password == "" {
c.ReplyParts("462", "You may not register")
c.Close()
return
}
contents, err := ioutil.ReadFile(*passwords)
if err != nil {
log.Fatalf("can not read passwords file %s: %s", *passwords, err)
return
}
for n, entry := range strings.Split(string(contents), "\n") {
if entry == "" || strings.HasPrefix(entry, "#") {
continue
}
cols := strings.Split(entry, ":")
if len(cols) != 2 {
log.Fatalf("bad passwords format: %s:%d", *passwords, n)
continue
}
if cols[0] != c.nickname {
continue
}
h := sha256.Sum256([]byte(c.password))
authenticated = subtle.ConstantTimeCompare(
[]byte(hex.EncodeToString(h[:])),
[]byte(cols[1]),
) == 1
break
}
if !authenticated {
c.ReplyParts("462", "You may not register")
c.Close()
return
}
}
c.registered = true
c.ReplyNicknamed("001", "Hi, welcome to IRC")
c.ReplyNicknamed("002", "Your host is "+*hostname+", running goircd "+Version)
c.ReplyNicknamed("003", "This server was created sometime")
c.ReplyNicknamed("004", *hostname+" goircd o o")
c.SendLusers()
c.SendMotd()
if *verbose {
log.Println(c, "logged in")
}
}
}

27
client_test.go
View File

@ -21,45 +21,46 @@ import (
"testing"
)
// 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()
sink := make(chan ClientEvent)
events := make(chan ClientEvent)
host := "foohost"
hostname = &host
client := NewClient(conn)
go client.Processor(sink)
client := NewClient(conn, events)
defer func() {
client.Close()
}()
event := <-sink
event := <-events
if event.eventType != EventNew {
t.Fatal("no NEW event", event)
}
conn.inbound <- "foo"
event = <-sink
event = <-events
if (event.eventType != EventMsg) || (event.text != "foo") {
t.Fatal("no first MSG", event)
}
conn.inbound <- "bar"
event = <-sink
event = <-events
if (event.eventType != EventMsg) || (event.text != "bar") {
t.Fatal("no second MSG", event)
}
conn.inbound <- ""
event = <-sink
event = <-events
if event.eventType != EventDel {
t.Fatal("no client termination", event)
}
}
// Test replies formatting
func TestClientReplies(t *testing.T) {
conn := NewTestingConn()
host := "foohost"
hostname = &host
client := NewClient(conn)
nickname := "мойник"
client.nickname = &nickname
client := NewClient(conn, make(chan ClientEvent, 2))
defer func() {
client.Close()
}()
client.nickname = "мойник"
client.Reply("hello")
if r := <-conn.outbound; r != ":foohost hello\r\n" {

21
common_test.go
View File

@ -18,22 +18,23 @@ along with this program. If not, see <http://www.gnu.org/licenses/>.
package main
import (
"io"
"net"
"time"
)
// Testing network connection that satisfies net.Conn interface
// Can send predefined messages and store all written ones
type TestingConn struct {
inbound chan string
outbound chan string
closed bool
closed chan struct{}
}
func NewTestingConn() *TestingConn {
inbound := make(chan string, 8)
outbound := make(chan string, 8)
return &TestingConn{inbound: inbound, outbound: outbound}
return &TestingConn{
inbound: make(chan string, 8),
outbound: make(chan string, 8),
closed: make(chan struct{}),
}
}
func (conn TestingConn) Error() string {
@ -41,7 +42,8 @@ func (conn TestingConn) Error() string {
}
func (conn *TestingConn) Read(b []byte) (n int, err error) {
msg := <-conn.inbound
select {
case msg := <-conn.inbound:
if msg == "" {
return 0, conn
}
@ -49,6 +51,9 @@ func (conn *TestingConn) Read(b []byte) (n int, err error) {
b[n] = bt
}
return len(msg) + 2, nil
case <-conn.closed:
return 0, io.EOF
}
}
type MyAddr struct{}
@ -66,7 +71,7 @@ func (conn *TestingConn) Write(b []byte) (n int, err error) {
}
func (conn *TestingConn) Close() error {
conn.closed = true
close(conn.closed)
close(conn.outbound)
return nil
}

537
daemon.go
View File

@ -19,13 +19,8 @@ package main
import (
"fmt"
"io/ioutil"
"log"
"net"
"regexp"
"sort"
"strings"
"sync"
"time"
)
@ -36,289 +31,26 @@ const (
PingThreshold = time.Second * 90
)
var (
RENickname = regexp.MustCompile("^[a-zA-Z0-9-]{1,24}$")
clients map[*Client]struct{} = make(map[*Client]struct{})
clientsM sync.RWMutex
rooms map[string]*Room = make(map[string]*Room)
roomsM sync.RWMutex
roomsGroup sync.WaitGroup
roomSinks map[*Room]chan ClientEvent = make(map[*Room]chan ClientEvent)
)
func SendLusers(client *Client) {
lusers := 0
clientsM.RLock()
for client := range clients {
if client.registered {
lusers++
}
}
clientsM.RUnlock()
client.ReplyNicknamed("251", fmt.Sprintf("There are %d users and 0 invisible on 1 servers", lusers))
}
func SendMotd(client *Client) {
if motd == nil {
client.ReplyNicknamed("422", "MOTD File is missing")
return
}
motdText, err := ioutil.ReadFile(*motd)
if err != nil {
log.Printf("Can not read motd file %s: %v", *motd, err)
client.ReplyNicknamed("422", "Error reading MOTD File")
return
}
client.ReplyNicknamed("375", "- "+*hostname+" Message of the day -")
for _, s := range strings.Split(strings.TrimSuffix(string(motdText), "\n"), "\n") {
client.ReplyNicknamed("372", "- "+s)
}
client.ReplyNicknamed("376", "End of /MOTD command")
}
func SendWhois(client *Client, nicknames []string) {
var c *Client
var hostPort string
var err error
var subscriptions []string
var room *Room
var subscriber *Client
for _, nickname := range nicknames {
nickname = strings.ToLower(nickname)
clientsM.RLock()
for c = range clients {
if strings.ToLower(*c.nickname) == nickname {
clientsM.RUnlock()
goto Found
}
}
clientsM.RUnlock()
client.ReplyNoNickChan(nickname)
continue
Found:
hostPort, _, err = net.SplitHostPort(c.conn.RemoteAddr().String())
if err != nil {
log.Printf("Can't parse RemoteAddr %q: %v", hostPort, err)
hostPort = "Unknown"
}
client.ReplyNicknamed("311", *c.nickname, *c.username, hostPort, "*", *c.realname)
client.ReplyNicknamed("312", *c.nickname, *hostname, *hostname)
if c.away != nil {
client.ReplyNicknamed("301", *c.nickname, *c.away)
}
subscriptions = make([]string, 0)
roomsM.RLock()
for _, room = range rooms {
for subscriber = range room.members {
if *subscriber.nickname == nickname {
subscriptions = append(subscriptions, *room.name)
}
}
}
roomsM.RUnlock()
sort.Strings(subscriptions)
client.ReplyNicknamed("319", *c.nickname, strings.Join(subscriptions, " "))
client.ReplyNicknamed("318", *c.nickname, "End of /WHOIS list")
}
}
func SendList(client *Client, cols []string) {
var rs []string
var r string
if (len(cols) > 1) && (cols[1] != "") {
rs = strings.Split(strings.Split(cols[1], " ")[0], ",")
} else {
rs = make([]string, 0)
roomsM.RLock()
for r = range rooms {
rs = append(rs, r)
}
roomsM.RUnlock()
}
sort.Strings(rs)
var room *Room
var found bool
for _, r = range rs {
roomsM.RLock()
if room, found = rooms[r]; found {
client.ReplyNicknamed(
"322",
r,
fmt.Sprintf("%d", len(room.members)),
*room.topic,
)
}
roomsM.RUnlock()
}
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 ClientRegister(client *Client, cmd string, cols []string) {
switch cmd {
case "PASS":
if len(cols) == 1 || len(cols[1]) < 1 {
client.ReplyNotEnoughParameters("PASS")
return
}
password := strings.TrimPrefix(cols[1], ":")
client.password = &password
case "NICK":
if len(cols) == 1 || len(cols[1]) < 1 {
client.ReplyParts("431", "No nickname given")
return
}
nickname := cols[1]
// Compatibility with some clients prepending colons to nickname
nickname = strings.TrimPrefix(nickname, ":")
nickname = strings.ToLower(nickname)
clientsM.RLock()
for existingClient := range clients {
if *existingClient.nickname == nickname {
clientsM.RUnlock()
client.ReplyParts("433", "*", nickname, "Nickname is already in use")
return
}
}
clientsM.RUnlock()
if !RENickname.MatchString(nickname) {
client.ReplyParts("432", "*", cols[1], "Erroneous nickname")
return
}
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]
realname := strings.TrimLeft(args[3], ":")
client.realname = &realname
}
if *client.nickname != "*" && *client.username != "" {
if passwords != nil && *passwords != "" {
if client.password == nil {
client.ReplyParts("462", "You may not register")
client.Close()
return
}
contents, err := ioutil.ReadFile(*passwords)
if err != nil {
log.Fatalf("Can no read passwords file %s: %s", *passwords, err)
return
}
for _, entry := range strings.Split(string(contents), "\n") {
if entry == "" {
continue
}
if lp := strings.Split(entry, ":"); lp[0] == *client.nickname && lp[1] != *client.password {
client.ReplyParts("462", "You may not register")
client.Close()
return
}
}
}
client.registered = true
client.ReplyNicknamed("001", "Hi, welcome to IRC")
client.ReplyNicknamed("002", "Your host is "+*hostname+", running goircd "+Version)
client.ReplyNicknamed("003", "This server was created sometime")
client.ReplyNicknamed("004", *hostname+" goircd o o")
SendLusers(client)
SendMotd(client)
log.Println(client, "logged in")
}
}
// Register new room in Daemon. Create an object, events sink, save pointers
// to corresponding daemon's places and start room's processor goroutine.
func RoomRegister(name string) (*Room, chan ClientEvent) {
roomNew := NewRoom(name)
roomSink := make(chan ClientEvent)
roomsM.Lock()
rooms[name] = roomNew
roomSinks[roomNew] = roomSink
roomsM.Unlock()
go roomNew.Processor(roomSink)
roomsGroup.Add(1)
return roomNew, roomSink
}
func HandlerJoin(client *Client, cmd string) {
args := strings.Split(cmd, " ")
rs := strings.Split(args[0], ",")
var keys []string
if len(args) > 1 {
keys = strings.Split(args[1], ",")
} else {
keys = make([]string, 0)
}
var roomExisting *Room
var roomSink chan ClientEvent
var roomNew *Room
for n, room := range rs {
if !RoomNameValid(room) {
client.ReplyNoChannel(room)
continue
}
var key string
if (n < len(keys)) && (keys[n] != "") {
key = keys[n]
} else {
key = ""
}
roomsM.RLock()
for roomExisting, roomSink = range roomSinks {
if room == *roomExisting.name {
roomsM.RUnlock()
if (*roomExisting.key != "") && (*roomExisting.key != key) {
goto Denied
}
roomSink <- ClientEvent{client, EventNew, ""}
goto Joined
}
}
roomsM.RUnlock()
roomNew, roomSink = RoomRegister(room)
log.Println("Room", roomNew, "created")
if key != "" {
roomNew.key = &key
roomNew.StateSave()
}
roomSink <- ClientEvent{client, EventNew, ""}
continue
Denied:
client.ReplyNicknamed("475", room, "Cannot join channel (+k) - bad key")
Joined:
}
}
func Processor(events chan ClientEvent, finished chan struct{}) {
var now time.Time
ticker := time.NewTicker(10 * time.Second)
go func() {
for {
time.Sleep(10 * time.Second)
for range ticker.C {
events <- ClientEvent{eventType: EventTick}
}
}()
for event := range events {
EventsCycle:
for e := range events {
now = time.Now()
client := event.client
switch event.eventType {
client := e.client
switch e.eventType {
case EventTick:
clientsM.RLock()
clientsLock.RLock()
for c := range clients {
if c.recvTimestamp.Add(PingTimeout).Before(now) {
if *verbose {
log.Println(c, "ping timeout")
}
c.Close()
continue
}
@ -327,57 +59,55 @@ func Processor(events chan ClientEvent, finished chan struct{}) {
c.Msg("PING :" + *hostname)
c.sendTimestamp = time.Now()
} else {
if *verbose {
log.Println(c, "ping timeout")
}
c.Close()
}
}
}
clientsM.RUnlock()
roomsM.Lock()
clientsLock.RUnlock()
roomsLock.Lock()
for rn, r := range rooms {
if *statedir == "" && len(r.members) == 0 {
if *verbose {
log.Println(rn, "emptied room")
}
delete(rooms, rn)
close(roomSinks[r])
delete(roomSinks, r)
close(r.events)
}
}
roomsM.Unlock()
roomsLock.Unlock()
case EventTerm:
roomsM.RLock()
for _, sink := range roomSinks {
sink <- ClientEvent{eventType: EventTerm}
}
roomsM.RUnlock()
roomsGroup.Wait()
close(finished)
return
break EventsCycle
case EventNew:
clientsM.Lock()
clientsLock.Lock()
clients[client] = struct{}{}
clientsM.Unlock()
clientsLock.Unlock()
case EventDel:
clientsM.Lock()
clientsLock.Lock()
delete(clients, client)
clientsM.Unlock()
roomsM.RLock()
for _, roomSink := range roomSinks {
roomSink <- event
clientsLock.Unlock()
roomsLock.RLock()
for _, r := range rooms {
r.events <- e
}
roomsM.RUnlock()
roomsLock.RUnlock()
case EventMsg:
cols := strings.SplitN(event.text, " ", 2)
cols := strings.SplitN(e.text, " ", 2)
cmd := strings.ToUpper(cols[0])
if *verbose {
log.Println(client, "command", cmd)
}
if cmd == "QUIT" {
log.Println(client, "quit")
client.Close()
if *verbose {
log.Println(client, "quit")
}
continue
}
if !client.registered {
ClientRegister(client, cmd, cols)
client.Register(cmd, cols)
continue
}
if client != nil {
@ -386,68 +116,83 @@ func Processor(events chan ClientEvent, finished chan struct{}) {
switch cmd {
case "AWAY":
if len(cols) == 1 {
client.away = nil
client.away = ""
client.ReplyNicknamed("305", "You are no longer marked as being away")
continue
}
msg := strings.TrimLeft(cols[1], ":")
client.away = &msg
client.away = strings.TrimLeft(cols[1], ":")
client.ReplyNicknamed("306", "You have been marked as being away")
case "JOIN":
if len(cols) == 1 || len(cols[1]) < 1 {
client.ReplyNotEnoughParameters("JOIN")
continue
}
HandlerJoin(client, cols[1])
client.Join(cols[1])
case "LIST":
SendList(client, cols)
client.SendList(cols)
case "LUSERS":
SendLusers(client)
client.SendLusers()
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")
}
if cols[0] == client.username {
client.Msg("221 " + client.nickname + " +w")
// client.ReplyNicknamed("501", "Unknown MODE flag")
continue
}
room := cols[0]
roomsM.RLock()
r, found := rooms[room]
if !found {
client.ReplyNoChannel(room)
roomsM.RUnlock()
continue
}
if len(cols) == 1 {
roomSinks[r] <- ClientEvent{client, EventMode, ""}
r.events <- ClientEvent{client, EventMode, ""}
} else {
roomSinks[r] <- ClientEvent{client, EventMode, cols[1]}
r.events <- ClientEvent{client, EventMode, cols[1]}
}
roomsM.RUnlock()
case "MOTD":
SendMotd(client)
client.SendMotd()
case "NAMES":
rs := make([]*Room, len(cols))
roomsLock.RLock()
if len(cols) == 0 {
for _, r := range rooms {
rs = append(rs, r)
}
} else {
needed := make(map[string]struct{}, len(rs))
for _, r := range cols {
needed[r] = struct{}{}
}
for rn, r := range rooms {
if _, found := needed[rn]; found {
rs = append(rs, r)
}
}
}
roomsLock.RUnlock()
for _, r := range rs {
r.SendNames(client)
}
case "PART":
if len(cols) == 1 || len(cols[1]) < 1 {
client.ReplyNotEnoughParameters("PART")
continue
}
rs := strings.Split(cols[1], " ")[0]
roomsM.RLock()
roomsLock.RLock()
for _, room := range strings.Split(rs, ",") {
if r, found := rooms[room]; found {
roomSinks[r] <- ClientEvent{client, EventDel, ""}
r.events <- ClientEvent{client, EventDel, ""}
} else {
client.ReplyNoChannel(room)
}
}
roomsM.RUnlock()
roomsLock.RUnlock()
case "PING":
if len(cols) == 1 {
client.ReplyNicknamed("409", "No origin specified")
@ -466,43 +211,43 @@ func Processor(events chan ClientEvent, finished chan struct{}) {
client.ReplyNicknamed("412", "No text to send")
continue
}
msg := ""
target := strings.ToLower(cols[0])
clientsM.RLock()
for c := range clients {
if *c.nickname == target {
msg = fmt.Sprintf(":%s %s %s %s", client, cmd, *c.nickname, cols[1])
c.Msg(msg)
if c.away != nil {
client.ReplyNicknamed("301", *c.nickname, *c.away)
}
break
}
}
clientsM.RUnlock()
if msg != "" {
continue
}
roomsM.RLock()
roomsLock.RLock()
if r, found := rooms[target]; found {
roomSinks[r] <- ClientEvent{
r.events <- ClientEvent{
client,
EventMsg,
cmd + " " + strings.TrimLeft(cols[1], ":"),
}
} else {
client.ReplyNoNickChan(target)
roomsLock.RUnlock()
continue
}
roomsM.RUnlock()
roomsLock.RUnlock()
var msg string
clientsLock.RLock()
for c := range clients {
if c.nickname != target {
continue
}
msg = fmt.Sprintf(":%s %s %s %s", client, cmd, c.nickname, cols[1])
c.Msg(msg)
if c.away != "" {
client.ReplyNicknamed("301", c.nickname, c.away)
}
break
}
clientsLock.RUnlock()
if msg != "" {
continue
}
client.ReplyNoNickChan(target)
case "TOPIC":
if len(cols) == 1 {
client.ReplyNotEnoughParameters("TOPIC")
continue
}
cols = strings.SplitN(cols[1], " ", 2)
roomsM.RLock()
r, found := rooms[cols[0]]
roomsM.RUnlock()
if !found {
client.ReplyNoChannel(cols[0])
continue
@ -510,25 +255,20 @@ func Processor(events chan ClientEvent, finished chan struct{}) {
var change string
if len(cols) > 1 {
change = cols[1]
} else {
change = ""
}
roomsM.RLock()
roomSinks[r] <- ClientEvent{client, EventTopic, change}
roomsM.RUnlock()
r.events <- ClientEvent{client, EventTopic, change}
case "WHO":
if len(cols) == 1 || len(cols[1]) < 1 {
client.ReplyNotEnoughParameters("WHO")
continue
}
room := strings.Split(cols[1], " ")[0]
roomsM.RLock()
if r, found := rooms[room]; found {
roomSinks[r] <- ClientEvent{client, EventWho, ""}
r, found := rooms[room]
if found {
r.events <- ClientEvent{client, EventWho, ""}
} else {
client.ReplyNoChannel(room)
}
roomsM.RUnlock()
case "WHOIS":
if len(cols) == 1 || len(cols[1]) < 1 {
client.ReplyNotEnoughParameters("WHOIS")
@ -536,31 +276,51 @@ func Processor(events chan ClientEvent, finished chan struct{}) {
}
cols := strings.Split(cols[1], " ")
nicknames := strings.Split(cols[len(cols)-1], ",")
SendWhois(client, nicknames)
client.SendWhois(nicknames)
case "ISON":
if len(cols) == 1 || len(cols[1]) < 1 {
client.ReplyNotEnoughParameters("ISON")
continue
}
nicksKnown := make(map[string]struct{})
clientsM.RLock()
nicknamesList := strings.Split(cols[1], " ")
nicknames := make(map[string]bool, len(nicknamesList))
for _, nickname := range nicknamesList {
nicknames[nickname] = false
}
clientsLock.RLock()
for c := range clients {
nicksKnown[*c.nickname] = struct{}{}
}
clientsM.RUnlock()
var nicksExists []string
for _, nickname := range strings.Split(cols[1], " ") {
if _, exists := nicksKnown[nickname]; exists {
nicksExists = append(nicksExists, nickname)
if _, exists := nicknames[c.nickname]; exists {
nicknames[c.nickname] = true
}
}
client.ReplyNicknamed("303", strings.Join(nicksExists, " "))
clientsLock.RUnlock()
nicknamesList = nicknamesList[:0]
for n, exists := range nicknames {
if exists {
nicknamesList = append(nicknamesList, n)
}
}
client.ReplyNicknamed("303", strings.Join(nicknamesList, " "))
case "WALLOPS":
if len(cols) == 1 {
client.ReplyNotEnoughParameters("WALLOPS")
continue
}
cs := make([]*Client, 0, len(clients))
clientsLock.RLock()
for c := range clients {
if c != client {
cs = append(cs, c)
}
}
clientsLock.RUnlock()
for _, c := range cs {
c.Msg(fmt.Sprintf(":%s NOTICE %s %s", client, c.nickname, cols[1]))
}
case "VERSION":
var debug string
if *verbose {
debug = "debug"
} else {
debug = ""
}
client.ReplyNicknamed("351", fmt.Sprintf("%s.%s %s :", Version, debug, *hostname))
default:
@ -568,4 +328,47 @@ func Processor(events chan ClientEvent, finished chan struct{}) {
}
}
}
ticker.Stop()
// Notify all clients about shutdown
clientsLock.RLock()
for c := range clients {
c.Msg(fmt.Sprintf(
":%s NOTICE %s %s", *hostname, c.nickname,
":Server is shutting down",
))
c.Close()
}
clientsLock.RUnlock()
// Read their EventDel
go func() {
for range events {
}
}()
// Stop room processors
roomsLock.RLock()
for _, r := range rooms {
r.events <- ClientEvent{eventType: EventTerm}
}
roomsLock.RUnlock()
roomsWG.Wait()
// Wait for either 5sec or all clients quitting
t := time.NewTimer(5 * time.Second)
clientsDone := make(chan struct{})
go func() {
clientsWG.Wait()
close(clientsDone)
}()
select {
case <-t.C:
case <-clientsDone:
}
if !t.Stop() {
<-t.C
}
close(events)
close(finished)
}

22
daemon_test.go
View File

@ -28,13 +28,14 @@ func TestRegistrationWorkflow(t *testing.T) {
host := "foohost"
hostname = &host
events := make(chan ClientEvent)
finished := make(chan struct{})
defer func() {
events <- ClientEvent{eventType: EventTerm}
<-finished
}()
go Processor(events, make(chan struct{}))
go Processor(events, finished)
conn := NewTestingConn()
client := NewClient(conn)
go client.Processor(events)
client := NewClient(conn, events)
conn.inbound <- "UNEXISTENT CMD" // should receive nothing on this
conn.inbound <- "NICK"
@ -54,7 +55,7 @@ func TestRegistrationWorkflow(t *testing.T) {
if r := <-conn.outbound; r != ":foohost 461 meinick USER :Not enough parameters\r\n" {
t.Fatal("461 for USER", r)
}
if (*client.nickname != "meinick") || client.registered {
if (client.nickname != "meinick") || client.registered {
t.Fatal("NICK saved")
}
@ -63,7 +64,7 @@ func TestRegistrationWorkflow(t *testing.T) {
t.Fatal("461 again for USER", r)
}
SendLusers(client)
client.SendLusers()
if r := <-conn.outbound; !strings.Contains(r, "There are 0 users") {
t.Fatal("LUSERS", r)
}
@ -87,7 +88,7 @@ func TestRegistrationWorkflow(t *testing.T) {
if r := <-conn.outbound; !strings.Contains(r, ":foohost 422") {
t.Fatal("422 after registration", r)
}
if (*client.username != "1") || (*client.realname != "4 5") || !client.registered {
if (client.username != "1") || (client.realname != "4 5") || !client.registered {
t.Fatal("client register")
}
@ -98,7 +99,7 @@ func TestRegistrationWorkflow(t *testing.T) {
t.Fatal("reply for unexistent command", r)
}
SendLusers(client)
client.SendLusers()
if r := <-conn.outbound; !strings.Contains(r, "There are 1 users") {
t.Fatal("1 users logged in", r)
}
@ -122,11 +123,14 @@ func TestMotd(t *testing.T) {
conn := NewTestingConn()
host := "foohost"
hostname = &host
client := NewClient(conn)
client := NewClient(conn, make(chan ClientEvent, 2))
defer func() {
client.Close()
}()
motdName := fd.Name()
motd = &motdName
SendMotd(client)
client.SendMotd()
if r := <-conn.outbound; !strings.HasPrefix(r, ":foohost 375") {
t.Fatal("MOTD start", r)
}

119
events.go
View File

@ -1,119 +0,0 @@
/*
goircd -- minimalistic simple Internet Relay Chat (IRC) server
Copyright (C) 2014-2020 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, version 3 of the License.
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"
"log"
"os"
"path"
"time"
)
const (
EventNew = iota
EventDel = iota
EventMsg = iota
EventTopic = iota
EventWho = iota
EventMode = iota
EventTerm = iota
EventTick = iota
FormatMsg = "[%s] <%s> %s\n"
FormatMeta = "[%s] * %s %s\n"
)
var (
logSink chan LogEvent = make(chan LogEvent)
stateSink chan StateEvent = make(chan StateEvent)
)
// Client events going from each of client
// They can be either NEW, DEL or unparsed MSG
type ClientEvent struct {
client *Client
eventType int
text string
}
func (m ClientEvent) String() string {
return string(m.eventType) + ": " + 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
var logfile string
var fd *os.File
var err error
for event := range events {
logfile = path.Join(logdir, event.where+".log")
fd, err = os.OpenFile(logfile, mode, perm)
if err != nil {
log.Println("Can not open logfile", logfile, err)
continue
}
if event.meta {
format = FormatMeta
} else {
format = FormatMsg
}
_, 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) {
var fn string
var data string
var err error
for event := range events {
fn = path.Join(statedir, event.where)
data = event.topic + "\n" + event.key + "\n"
err = ioutil.WriteFile(fn, []byte(data), os.FileMode(0660))
if err != nil {
log.Printf("Can not write statefile %s: %v", fn, err)
}
}
}

275
goircd.go
View File

@ -23,114 +23,213 @@ import (
"io/ioutil"
"log"
"net"
"os"
"os/signal"
"path"
"path/filepath"
"strconv"
"strings"
"syscall"
)
const Version = "1.8.2"
const (
Version = "1.9.0"
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")
passwords = flag.String("passwords", "", "Optional path to passwords file")
tlsBind = flag.String("tlsbind", "", "TLS address to bind to")
tlsPEM = flag.String("tlspem", "", "Path to TLS certificat+key PEM file")
verbose = flag.Bool("v", false, "Enable verbose logging.")
StateTopicFilename = "topic"
StateKeyFilename = "key"
EventNew = iota
EventDel = iota
EventMsg = iota
EventTopic = iota
EventWho = iota
EventMode = iota
EventTerm = iota
EventTick = iota
)
func listenerLoop(sock net.Listener, events chan ClientEvent) {
for {
conn, err := sock.Accept()
if err != nil {
log.Println("Error during accepting connection", err)
continue
}
client := NewClient(conn)
go client.Processor(events)
}
type ClientEvent struct {
client *Client
eventType int
text string
}
func Run() {
events := make(chan ClientEvent)
log.SetFlags(log.Ldate | log.Lmicroseconds | log.Lshortfile)
type StateEvent struct {
where string
topic string
key string
}
if *logdir == "" {
// Dummy logger
go func() {
for _ = range logSink {
}
}()
} else {
if !path.IsAbs(*logdir) {
log.Fatalln("Need absolute path for logdir")
}
go Logger(*logdir, logSink)
log.Println(*logdir, "logger initialized")
}
var (
hostname = flag.String("hostname", "localhost", "hostname")
bind = flag.String("bind", "[::1]:6667", "address to bind to")
cloak = flag.String("cloak", "", "cloak user's host with the given hostname")
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")
passwords = flag.String("passwd", "", "optional path to passwords file")
tlsBind = flag.String("tlsbind", "", "TLS address to bind to")
tlsPEM = flag.String("tlspem", "", "path to TLS certificat+key PEM file")
permStateDirS = flag.String("perm-state-dir", "755", "state directory permissions")
permStateFileS = flag.String("perm-state-file", "600", "state files permissions")
permLogFileS = flag.String("perm-log-file", "644", "log files permissions")
timestamped = flag.Bool("timestamped", false, "enable timestamps on stderr messages")
verbose = flag.Bool("verbose", false, "enable verbose logging")
debug = flag.Bool("debug", false, "enable debug (traffic) logging")
log.Println("goircd " + Version + " is starting")
if *statedir == "" {
// Dummy statekeeper
go func() {
for _ = range stateSink {
}
}()
} else {
if !path.IsAbs(*statedir) {
log.Fatalln("Need absolute path for statedir")
}
states, err := filepath.Glob(path.Join(*statedir, "#*"))
if err != nil {
log.Fatalln("Can not read statedir", err)
}
for _, state := range states {
buf, err := ioutil.ReadFile(state)
if err != nil {
log.Fatalf("Can not read state %s: %v", state, err)
}
room, _ := RoomRegister(path.Base(state))
contents := strings.Split(string(buf), "\n")
if len(contents) < 2 {
log.Printf("State corrupted for %s: %q", *room.name, contents)
} else {
room.topic = &contents[0]
room.key = &contents[1]
log.Println("Loaded state for room", *room.name)
}
}
go StateKeeper(*statedir, stateSink)
log.Println(*statedir, "statekeeper initialized")
}
permStateDir os.FileMode
permStateFile os.FileMode
permLogFile os.FileMode
if *bind != "" {
listener, err := net.Listen("tcp", *bind)
stateSink chan StateEvent = make(chan StateEvent)
)
func permParse(s string) os.FileMode {
r, err := strconv.ParseUint(s, 8, 16)
if err != nil {
log.Fatalf("Can not listen on %s: %v", *bind, err)
log.Fatalln(err)
}
log.Println("Raw listening on", *bind)
go listenerLoop(listener, events)
}
if *tlsBind != "" {
cert, err := tls.LoadX509KeyPair(*tlsPEM, *tlsPEM)
return os.FileMode(r)
}
func listenerLoop(ln net.Listener, events chan ClientEvent) {
for {
conn, err := ln.Accept()
if err != nil {
log.Fatalf("Could not load TLS keys from %s: %s", *tlsPEM, err)
log.Println("error during accept", err)
continue
}
config := tls.Config{Certificates: []tls.Certificate{cert}}
listenerTLS, err := tls.Listen("tcp", *tlsBind, &config)
if err != nil {
log.Fatalf("Can not listen on %s: %v", *tlsBind, err)
NewClient(conn, events)
}
log.Println("TLS listening on", *tlsBind)
go listenerLoop(listenerTLS, events)
}
Processor(events, make(chan struct{}))
}
func main() {
flag.Parse()
Run()
permStateDir = permParse(*permStateDirS)
permStateFile = permParse(*permStateFileS)
permLogFile = permParse(*permLogFileS)
if *timestamped {
log.SetFlags(log.Ldate | log.Lmicroseconds | log.Lshortfile)
} else {
log.SetFlags(log.Lshortfile)
}
log.SetOutput(os.Stdout)
if *logdir == "" {
// Dummy logger
go func() {
for range logSink {
}
}()
} else {
if !path.IsAbs(*logdir) {
log.Fatalln("need absolute path for logdir")
}
go Logger(*logdir, logSink)
}
if *statedir == "" {
// Dummy statekeeper
go func() {
for range stateSink {
}
}()
} else {
if !path.IsAbs(*statedir) {
log.Fatalln("need absolute path for statedir")
}
states, err := filepath.Glob(path.Join(*statedir, "#*"))
if err != nil {
log.Fatalln("can not read statedir", err)
}
for _, state := range states {
buf, err := ioutil.ReadFile(path.Join(state, StateTopicFilename))
if err != nil {
log.Fatalf(
"can not read state %s/%s: %v",
state, StateTopicFilename, err,
)
}
room := RoomRegister(path.Base(state))
room.topic = strings.TrimRight(string(buf), "\n")
buf, err = ioutil.ReadFile(path.Join(state, StateKeyFilename))
if err == nil {
room.key = strings.TrimRight(string(buf), "\n")
} else {
if !os.IsNotExist(err) {
log.Fatalf(
"can not read state %s/%s: %v",
state, StateKeyFilename, err,
)
}
}
log.Println("loaded state for room:", room.name)
}
go func() {
for event := range stateSink {
statePath := path.Join(*statedir, event.where)
if _, err := os.Stat(statePath); os.IsNotExist(err) {
if err := os.Mkdir(statePath, permStateDir); err != nil {
log.Printf("can not create state %s: %v", statePath, err)
continue
}
}
topicPath := path.Join(statePath, StateTopicFilename)
if err := ioutil.WriteFile(
topicPath,
[]byte(event.topic+"\n"),
permStateFile,
); err != nil {
log.Printf("can not write statefile %s: %v", topicPath, err)
continue
}
keyPath := path.Join(statePath, StateKeyFilename)
if err := ioutil.WriteFile(
keyPath,
[]byte(event.key+"\n"),
permStateFile,
); err != nil {
log.Printf("can not write statefile %s: %v", keyPath, err)
}
}
}()
}
events := make(chan ClientEvent)
if *bind != "" {
ln, err := net.Listen("tcp", *bind)
if err != nil {
log.Fatalf("can not listen on %s: %v", *bind, err)
}
go listenerLoop(ln, events)
}
if *tlsBind != "" {
cert, err := tls.LoadX509KeyPair(*tlsPEM, *tlsPEM)
if err != nil {
log.Fatalf("can not load TLS keys from %s: %s", *tlsPEM, err)
}
config := tls.Config{Certificates: []tls.Certificate{cert}}
ln, err := tls.Listen("tcp", *tlsBind, &config)
if err != nil {
log.Fatalf("can not listen on %s: %v", *tlsBind, err)
}
go listenerLoop(ln, events)
}
log.Println("goircd", Version, "started")
needsShutdown := make(chan os.Signal, 0)
signal.Notify(needsShutdown, syscall.SIGTERM, syscall.SIGINT)
go func() {
<-needsShutdown
events <- ClientEvent{eventType: EventTerm}
log.Println("goircd shutting down")
}()
finished := make(chan struct{})
go Processor(events, finished)
<-finished
}

72
log.go Normal file
View File

@ -0,0 +1,72 @@
/*
goircd -- minimalistic simple Internet Relay Chat (IRC) server
Copyright (C) 2014-2020 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, version 3 of the License.
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 (
FormatMsg = "[%s] <%s> %s\n"
FormatMeta = "[%s] * %s %s\n"
)
var logSink chan LogEvent = make(chan LogEvent)
type LogEvent struct {
where string
who string
what string
meta bool
}
func Logger(logdir string, events <-chan LogEvent) {
mode := os.O_CREATE | os.O_WRONLY | os.O_APPEND
perm := os.FileMode(permLogFile)
var format string
var logfile string
var fd *os.File
var err error
for event := range events {
logfile = path.Join(logdir, event.where+".log")
fd, err = os.OpenFile(logfile, mode, perm)
if err != nil {
log.Println("can not open logfile", logfile, err)
continue
}
if event.meta {
format = FormatMeta
} else {
format = FormatMsg
}
_, err = fd.WriteString(fmt.Sprintf(
format,
time.Now().Format(time.RFC3339),
event.who,
event.what,
))
fd.Close()
if err != nil {
log.Println("error writing to logfile", logfile, err)
}
}
}

306
room.go
View File

@ -26,225 +26,213 @@ import (
"sync"
)
var (
RERoom = regexp.MustCompile("^#[^\x00\x07\x0a\x0d ,:/]{1,200}$")
)
// Sanitize room's name. It can consist of 1 to 50 ASCII symbols
// with some exclusions. All room names will have "#" prefix.
func RoomNameValid(name string) bool {
return RERoom.MatchString(name)
}
type Room struct {
name *string
topic *string
key *string
name string
topic string
key string
members map[*Client]struct{}
events chan ClientEvent
sync.RWMutex
}
func (room *Room) String() (name string) {
room.RLock()
name = *room.name
room.RUnlock()
return
}
var (
RERoom = regexp.MustCompile("^#[^\x00\x07\x0a\x0d ,:/]{1,200}$")
func NewRoom(name string) *Room {
topic := ""
key := ""
return &Room{
name: &name,
topic: &topic,
key: &key,
members: make(map[*Client]struct{}),
}
}
rooms map[string]*Room = make(map[string]*Room)
roomsLock sync.RWMutex
roomsWG sync.WaitGroup
)
func (room *Room) SendTopic(client *Client) {
room.RLock()
if *room.topic == "" {
client.ReplyNicknamed("331", room.String(), "No topic is set")
func (r *Room) SendTopic(c *Client) {
t := r.topic
if t == "" {
c.ReplyNicknamed("331", r.name, "No topic is set")
} else {
client.ReplyNicknamed("332", room.String(), *room.topic)
c.ReplyNicknamed("332", r.name, t)
}
room.RUnlock()
}
// Send message to all room's subscribers, possibly excluding someone.
func (room *Room) Broadcast(msg string, clientToIgnore ...*Client) {
room.RLock()
for member := range room.members {
if (len(clientToIgnore) > 0) && member == clientToIgnore[0] {
func (r *Room) SendNames(c *Client) {
allowed := false
if r.key == "" {
allowed = true
} else if _, isMember := r.members[c]; isMember {
allowed = true
}
if !allowed {
c.ReplyNicknamed("475", r.name, "Cannot join channel (+k)")
return
}
r.RLock()
nicknames := make([]string, 0, len(r.members))
for member := range r.members {
nicknames = append(nicknames, member.nickname)
}
r.RUnlock()
sort.Strings(nicknames)
maxLen := 512 - len(*hostname) - 2 - 2
MoreNicknames:
lenAll := 0
lenName := 0
for i, n := range nicknames {
lenName = len(n) + 1
if lenAll+lenName >= maxLen {
c.ReplyNicknamed("353", "=", r.name, strings.Join(nicknames[:i-1], " "))
nicknames = nicknames[i:]
goto MoreNicknames
}
lenAll += lenName
}
if len(nicknames) > 0 {
c.ReplyNicknamed("353", "=", r.name, strings.Join(nicknames, " "))
}
c.ReplyNicknamed("366", r.name, "End of NAMES list")
}
func (r *Room) Broadcast(msg string, excludes ...*Client) {
var exclude *Client
if len(excludes) > 0 {
exclude = excludes[0]
}
r.RLock()
for member := range r.members {
if member == exclude {
continue
}
member.Msg(msg)
}
room.RUnlock()
r.RUnlock()
}
func (room *Room) StateSave() {
room.RLock()
stateSink <- StateEvent{room.String(), *room.topic, *room.key}
room.RUnlock()
func (r *Room) StateSave() {
stateSink <- StateEvent{r.name, r.topic, r.key}
}
func (room *Room) Processor(events <-chan ClientEvent) {
var client *Client
for event := range events {
client = event.client
switch event.eventType {
func (r *Room) Processor(events <-chan ClientEvent) {
for e := range events {
c := e.client
switch e.eventType {
case EventTerm:
roomsGroup.Done()
roomsWG.Done()
return
case EventNew:
room.Lock()
room.members[client] = struct{}{}
r.Lock()
r.members[c] = struct{}{}
r.Unlock()
if *verbose {
log.Println(client, "joined", room.name)
log.Println(c, "joined", r.name)
}
room.Unlock()
room.SendTopic(client)
room.Broadcast(fmt.Sprintf(":%s JOIN %s", client, room.String()))
logSink <- LogEvent{room.String(), *client.nickname, "joined", true}
nicknames := make([]string, 0)
room.RLock()
for member := range room.members {
nicknames = append(nicknames, *member.nickname)
}
room.RUnlock()
sort.Strings(nicknames)
client.ReplyNicknamed("353", "=", room.String(), strings.Join(nicknames, " "))
client.ReplyNicknamed("366", room.String(), "End of NAMES list")
r.SendTopic(c)
r.Broadcast(fmt.Sprintf(":%s JOIN %s", c, r.name))
logSink <- LogEvent{r.name, c.nickname, "joined", true}
r.SendNames(c)
case EventDel:
room.RLock()
if _, subscribed := room.members[client]; !subscribed {
client.ReplyNicknamed("442", room.String(), "You are not on that channel")
room.RUnlock()
if _, subscribed := r.members[c]; !subscribed {
c.ReplyNicknamed("442", r.name, "You are not on that channel")
continue
}
room.RUnlock()
room.Lock()
delete(room.members, client)
room.Unlock()
room.RLock()
msg := fmt.Sprintf(":%s PART %s :%s", client, room.String(), *client.nickname)
room.Broadcast(msg)
logSink <- LogEvent{room.String(), *client.nickname, "left", true}
room.RUnlock()
msg := fmt.Sprintf(":%s PART %s :%s", c, r.name, c.nickname)
r.Broadcast(msg)
r.Lock()
delete(r.members, c)
r.Unlock()
logSink <- LogEvent{r.name, c.nickname, "left", true}
if *verbose {
log.Println(c, "left", r.name)
}
case EventTopic:
room.RLock()
if _, subscribed := room.members[client]; !subscribed {
client.ReplyParts("442", room.String(), "You are not on that channel")
room.RUnlock()
if _, subscribed := r.members[c]; !subscribed {
c.ReplyParts("442", r.name, "You are not on that channel")
continue
}
if event.text == "" {
room.SendTopic(client)
room.RUnlock()
if e.text == "" {
r.SendTopic(c)
continue
}
room.RUnlock()
topic := strings.TrimLeft(event.text, ":")
room.Lock()
room.topic = &topic
room.Unlock()
room.RLock()
msg := fmt.Sprintf(":%s TOPIC %s :%s", client, room.String(), *room.topic)
room.Broadcast(msg)
logSink <- LogEvent{
room.String(),
*client.nickname,
"set topic to " + *room.topic,
true,
}
room.RUnlock()
room.StateSave()
topic := strings.TrimLeft(e.text, ":")
r.topic = topic
msg := fmt.Sprintf(":%s TOPIC %s :%s", c, r.name, r.topic)
r.Broadcast(msg)
logSink <- LogEvent{r.name, c.nickname, "set topic to " + r.topic, true}
r.StateSave()
case EventWho:
room.RLock()
for m := range room.members {
client.ReplyNicknamed(
r.RLock()
for m := range r.members {
c.ReplyNicknamed(
"352",
room.String(),
*m.username,
r.name,
m.username,
m.Host(),
*hostname,
*m.nickname,
m.nickname,
"H",
"0 "+*m.realname,
"0 "+m.realname,
)
}
client.ReplyNicknamed("315", room.String(), "End of /WHO list")
room.RUnlock()
c.ReplyNicknamed("315", r.name, "End of /WHO list")
r.RUnlock()
case EventMode:
room.RLock()
if event.text == "" {
mode := "+"
if *room.key != "" {
if e.text == "" {
mode := "+n"
if r.key != "" {
mode = mode + "k"
}
client.Msg(fmt.Sprintf("324 %s %s %s", *client.nickname, room.String(), mode))
room.RUnlock()
c.Msg(fmt.Sprintf("324 %s %s %s", c.nickname, r.name, mode))
continue
}
if strings.HasPrefix(event.text, "b") {
client.ReplyNicknamed("368", room.String(), "End of channel ban list")
room.RUnlock()
if strings.HasPrefix(e.text, "b") {
c.ReplyNicknamed("368", r.name, "End of channel ban list")
continue
}
if strings.HasPrefix(event.text, "-k") || strings.HasPrefix(event.text, "+k") {
if _, subscribed := room.members[client]; !subscribed {
client.ReplyParts("442", room.String(), "You are not on that channel")
room.RUnlock()
if strings.HasPrefix(e.text, "-k") || strings.HasPrefix(e.text, "+k") {
if _, subscribed := r.members[c]; !subscribed {
c.ReplyParts("442", r.name, "You are not on that channel")
continue
}
} else {
client.ReplyNicknamed("472", event.text, "Unknown MODE flag")
room.RUnlock()
c.ReplyNicknamed("472", e.text, "Unknown MODE flag")
continue
}
room.RUnlock()
var msg string
var msgLog string
if strings.HasPrefix(event.text, "+k") {
cols := strings.Split(event.text, " ")
if strings.HasPrefix(e.text, "+k") {
cols := strings.Split(e.text, " ")
if len(cols) == 1 {
client.ReplyNotEnoughParameters("MODE")
c.ReplyNotEnoughParameters("MODE")
continue
}
room.Lock()
room.key = &cols[1]
msg = fmt.Sprintf(":%s MODE %s +k %s", client, *room.name, *room.key)
msgLog = "set channel key to " + *room.key
room.Unlock()
r.key = cols[1]
msg = fmt.Sprintf(":%s MODE %s +k %s", c, r.name, r.key)
msgLog = "set channel key"
} else {
key := ""
room.Lock()
room.key = &key
msg = fmt.Sprintf(":%s MODE %s -k", client, *room.name)
room.Unlock()
r.key = ""
msg = fmt.Sprintf(":%s MODE %s -k", c, r.name)
msgLog = "removed channel key"
}
room.Broadcast(msg)
logSink <- LogEvent{room.String(), *client.nickname, msgLog, true}
room.StateSave()
r.Broadcast(msg)
logSink <- LogEvent{r.name, c.nickname, msgLog, true}
r.StateSave()
case EventMsg:
sep := strings.Index(event.text, " ")
room.Broadcast(fmt.Sprintf(
":%s %s %s :%s",
client,
event.text[:sep],
room.String(),
event.text[sep+1:]),
client,
)
logSink <- LogEvent{
room.String(),
*client.nickname,
event.text[sep+1:],
false,
}
sep := strings.Index(e.text, " ")
r.Broadcast(fmt.Sprintf(
":%s %s %s :%s", c, e.text[:sep], r.name, e.text[sep+1:],
), c)
logSink <- LogEvent{r.name, c.nickname, e.text[sep+1:], false}
}
}
}
func RoomRegister(name string) *Room {
r := &Room{
name: name,
members: make(map[*Client]struct{}),
events: make(chan ClientEvent),
}
roomsLock.Lock()
roomsWG.Add(1)
rooms[name] = r
roomsLock.Unlock()
go r.Processor(r.events)
return r
}

40
room_test.go
View File

@ -46,10 +46,9 @@ func TestTwoUsers(t *testing.T) {
host := "foohost"
hostname = &host
events := make(chan ClientEvent)
roomsM.Lock()
roomsLock.Lock()
rooms = make(map[string]*Room)
roomSinks = make(map[*Room]chan ClientEvent)
roomsM.Unlock()
roomsLock.Unlock()
clients = make(map[*Client]struct{})
finished := make(chan struct{})
go Processor(events, finished)
@ -60,10 +59,8 @@ func TestTwoUsers(t *testing.T) {
conn1 := NewTestingConn()
conn2 := NewTestingConn()
client1 := NewClient(conn1)
client2 := NewClient(conn2)
go client1.Processor(events)
go client2.Processor(events)
client1 := NewClient(conn1, events)
NewClient(conn2, events)
conn1.inbound <- "NICK nick1\r\nUSER foo1 bar1 baz1 :Long name1"
conn2.inbound <- "NICK nick2\r\nUSER foo2 bar2 baz2 :Long name2"
@ -72,7 +69,7 @@ func TestTwoUsers(t *testing.T) {
<-conn2.outbound
}
SendLusers(client1)
client1.SendLusers()
if r := <-conn1.outbound; !strings.Contains(r, "There are 2 users") {
t.Fatal("LUSERS", r)
}
@ -139,7 +136,6 @@ func TestJoin(t *testing.T) {
events := make(chan ClientEvent)
rooms = make(map[string]*Room)
clients = make(map[*Client]struct{})
roomSinks = make(map[*Room]chan ClientEvent)
finished := make(chan struct{})
go Processor(events, finished)
defer func() {
@ -147,8 +143,7 @@ func TestJoin(t *testing.T) {
<-finished
}()
conn := NewTestingConn()
client := NewClient(conn)
go client.Processor(events)
NewClient(conn, events)
conn.inbound <- "NICK nick2\r\nUSER foo2 bar2 baz2 :Long name2"
for i := 0; i < 6; i++ {
@ -183,14 +178,14 @@ func TestJoin(t *testing.T) {
for i := 0; i < 4*2; i++ {
<-conn.outbound
}
roomsM.RLock()
roomsLock.RLock()
if _, ok := rooms["#bar"]; !ok {
t.Fatal("#bar does not exist")
}
if _, ok := rooms["#baz"]; !ok {
t.Fatal("#baz does not exist")
}
roomsM.RUnlock()
roomsLock.RUnlock()
if r := <-logSink; (r.what != "joined") || (r.where != "#bar") || (r.who != "nick2") || (r.meta != true) {
t.Fatal("invalid join log event #bar", r)
}
@ -202,14 +197,14 @@ func TestJoin(t *testing.T) {
for i := 0; i < 4*2; i++ {
<-conn.outbound
}
roomsM.RLock()
if *rooms["#barenc"].key != "key1" {
roomsLock.RLock()
if rooms["#barenc"].key != "key1" {
t.Fatal("no room with key1")
}
if *rooms["#bazenc"].key != "key2" {
if rooms["#bazenc"].key != "key2" {
t.Fatal("no room with key2")
}
roomsM.RUnlock()
roomsLock.RUnlock()
if r := <-logSink; (r.what != "joined") || (r.where != "#barenc") || (r.who != "nick2") || (r.meta != true) {
t.Fatal("invalid join log event #barenc", r)
}
@ -227,11 +222,11 @@ func TestJoin(t *testing.T) {
if r := <-conn.outbound; r != ":nick2!foo2@someclient MODE #barenc -k\r\n" {
t.Fatal("remove #barenc key", r)
}
roomsM.RLock()
if *rooms["#barenc"].key != "" {
roomsLock.RLock()
if rooms["#barenc"].key != "" {
t.Fatal("removing key from #barenc")
}
roomsM.RUnlock()
roomsLock.RUnlock()
if r := <-logSink; (r.what != "removed channel key") || (r.where != "#barenc") || (r.who != "nick2") || (r.meta != true) {
t.Fatal("removed channel key log", r)
}
@ -240,6 +235,9 @@ func TestJoin(t *testing.T) {
}
conn.inbound <- "PART #bazenc\r\nMODE #bazenc -k"
if r := <-conn.outbound; r != ":nick2!foo2@someclient PART #bazenc :nick2\r\n" {
t.Fatal("part", r)
}
if r := <-conn.outbound; r != ":foohost 442 #bazenc :You are not on that channel\r\n" {
t.Fatal("not on that channel", r)
}
@ -256,7 +254,7 @@ func TestJoin(t *testing.T) {
if r := <-conn.outbound; r != ":nick2!foo2@someclient MODE #barenc +k newkey\r\n" {
t.Fatal("+k MODE setting", r)
}
if r := <-logSink; (r.what != "set channel key to newkey") || (r.where != "#barenc") || (r.who != "nick2") || (r.meta != true) {
if r := <-logSink; (r.what != "set channel key") || (r.where != "#barenc") || (r.who != "nick2") || (r.meta != true) {
t.Fatal("set channel key", r)
}
if r := <-stateSink; (r.topic != "") || (r.where != "#barenc") || (r.key != "newkey") {