package main
import (
- "bytes"
"fmt"
- "io"
+ "io/ioutil"
"log"
- "os"
+ "net"
"regexp"
"sort"
"strings"
ALIVENESS_CHECK = time.Second * 10 // Client's aliveness check period
)
+var (
+ RE_NICKNAME = regexp.MustCompile("^[a-zA-Z0-9-]{1,9}$")
+)
+
type Daemon struct {
+ Verbose bool
hostname string
motd string
clients map[*Client]bool
+ client_aliveness map[*Client]*ClientAlivenessState
rooms map[string]*Room
room_sinks map[*Room]chan ClientEvent
last_aliveness_check time.Time
- log_sink chan LogEvent
- state_sink chan StateEvent
+ log_sink chan<- LogEvent
+ state_sink chan<- StateEvent
}
-func NewDaemon(hostname, motd string, log_sink chan LogEvent, state_sink chan StateEvent) *Daemon {
+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.client_aliveness = make(map[*Client]*ClientAlivenessState)
daemon.rooms = make(map[string]*Room)
daemon.room_sinks = make(map[*Room]chan ClientEvent)
daemon.log_sink = log_sink
}
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")...)
- }
+ if len(daemon.motd) == 0 {
+ client.ReplyNicknamed("422", "MOTD File is missing")
+ return
+ }
- 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)
- }
+ motd, err := ioutil.ReadFile(daemon.motd)
+ if err != nil {
+ log.Printf("Can not read motd file %s: %v", daemon.motd, err)
+ client.ReplyNicknamed("422", "Error reading MOTD File")
+ return
+ }
+
+ client.ReplyNicknamed("375", "- "+daemon.hostname+" Message of the day -")
+ for _, s := range strings.Split(strings.Trim(string(motd), "\n"), "\n") {
+ client.ReplyNicknamed("372", "- "+string(s))
}
- client.ReplyNicknamed("422", "MOTD File is missing")
+ client.ReplyNicknamed("376", "End of /MOTD command")
}
func (daemon *Daemon) SendWhois(client *Client, nicknames []string) {
nickname = strings.ToLower(nickname)
found := false
for c := range daemon.clients {
- if c.nickname != nickname {
+ if strings.ToLower(c.nickname) != nickname {
continue
}
found = true
- client.ReplyNicknamed("311", c.nickname, c.username, c.conn.RemoteAddr().String(), "*", c.realname)
+ h := c.conn.RemoteAddr().String()
+ h, _, err := net.SplitHostPort(h)
+ if err != nil {
+ log.Printf("Can't parse RemoteAddr %q: %v", h, err)
+ h = "Unknown"
+ }
+ client.ReplyNicknamed("311", c.nickname, c.username, h, "*", c.realname)
client.ReplyNicknamed("312", c.nickname, daemon.hostname, daemon.hostname)
subscriptions := []string{}
for _, room := range daemon.rooms {
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
+ nickname := cols[1]
+ for existing_client := range daemon.clients {
+ if existing_client.nickname == nickname {
+ client.ReplyParts("433", "*", nickname, "Nickname is already in use")
+ return
}
}
- 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 {
+ if !RE_NICKNAME.MatchString(nickname) {
client.ReplyParts("432", "*", cols[1], "Erroneous nickname")
+ return
}
client.nickname = nickname
case "USER":
// 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) {
+func (daemon *Daemon) RoomRegister(name string) (*Room, chan<- ClientEvent) {
room_new := NewRoom(daemon.hostname, name, daemon.log_sink, daemon.state_sink)
+ room_new.Verbose = daemon.Verbose
room_sink := make(chan ClientEvent)
daemon.rooms[name] = room_new
daemon.room_sinks[room_new] = room_sink
keys = []string{}
}
for n, room := range rooms {
- room, valid := RoomNameSanitize(room)
- if !valid {
+ if !RoomNameValid(room) {
client.ReplyNoChannel(room)
continue
}
}
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_new.StateSave()
}
room_sink <- ClientEvent{client, EVENT_NEW, ""}
}
}
-func (daemon *Daemon) Processor(events chan ClientEvent) {
+func (daemon *Daemon) Processor(events <-chan ClientEvent) {
for event := range events {
+ now := time.Now()
+ client := event.client
// 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) {
+ aliveness, alive := daemon.client_aliveness[c]
+ if !alive {
+ continue
+ }
+ if aliveness.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 !aliveness.ping_sent && aliveness.timestamp.Add(PING_THRESHOLD).Before(now) {
if c.registered {
c.Msg("PING :" + daemon.hostname)
- c.ping_sent = true
+ aliveness.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
+ daemon.client_aliveness[client] = &ClientAlivenessState{ping_sent: false, timestamp: now}
case EVENT_DEL:
delete(daemon.clients, client)
+ delete(daemon.client_aliveness, 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 daemon.Verbose {
+ log.Println(client, "command", command)
+ }
if command == "QUIT" {
delete(daemon.clients, client)
+ delete(daemon.client_aliveness, client)
client.conn.Close()
continue
}
if !client.registered {
- go daemon.ClientRegister(client, command, cols)
+ daemon.ClientRegister(client, command, cols)
continue
}
switch command {
client.ReplyNotEnoughParameters("JOIN")
continue
}
- go daemon.HandlerJoin(client, cols[1])
+ daemon.HandlerJoin(client, cols[1])
case "LIST":
daemon.SendList(client, cols)
case "LUSERS":
}
continue
}
- room, _ := RoomNameSanitize(cols[0])
+ room := cols[0]
r, found := daemon.rooms[room]
if !found {
client.ReplyNoChannel(room)
continue
}
for _, room := range strings.Split(cols[1], ",") {
- room, _ = RoomNameSanitize(room)
r, found := daemon.rooms[room]
if !found {
client.ReplyNoChannel(room)
+ continue
}
daemon.room_sinks[r] <- ClientEvent{client, EVENT_DEL, ""}
}
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])
+ 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.ReplyNoNickChan(target)
continue
}
cols = strings.SplitN(cols[1], " ", 2)
- room, _ := RoomNameSanitize(cols[0])
- r, found := daemon.rooms[room]
+ r, found := daemon.rooms[cols[0]]
if !found {
- client.ReplyNoChannel(room)
+ client.ReplyNoChannel(cols[0])
+ continue
}
var change string
if len(cols) > 1 {
client.ReplyNotEnoughParameters("WHO")
continue
}
- room, _ := RoomNameSanitize(strings.Split(cols[1], " ")[0])
+ room := strings.Split(cols[1], " ")[0]
r, found := daemon.rooms[room]
if !found {
client.ReplyNoChannel(room)
+ continue
}
daemon.room_sinks[r] <- ClientEvent{client, EVENT_WHO, ""}
case "WHOIS":
client.ReplyNicknamed("421", command, "Unknown command")
}
}
+ if aliveness, alive := daemon.client_aliveness[client]; alive {
+ aliveness.timestamp = now
+ aliveness.ping_sent = false
+ }
}
}