func ConfReload() {
// Do not panic!
defer func() {
if r := recover(); r != nil {
log.Errorf("paniced when reloading config %s, recovered.", config_file)
log.Errorf("panic: %s", r)
}
}()
log.Warn("Reloading config")
content, err := ioutil.ReadFile(config_file)
if err != nil {
log.Errorf("unable to reload config %s: %s", config_file, err.Error())
return
}
prev_listen := config.Listen_addr
config_lock.Lock()
err = yaml.Unmarshal(content, &config)
if err != nil {
log.Errorf("error when parsing config file %s: %s", config_file, err.Error())
return
}
validateConfig()
config_lock.Unlock()
log.Info("config reloaded.")
if config.Listen_addr != prev_listen {
log.Warnf("config reload will not reopen server socket, thus no effect on listen address")
}
log.Infof("%d upstream server(s) found", len(config.Upstream))
}
func (upstream *Upstream) Validate() (valid bool) {
var host, port string
host, port, err := net.SplitHostPort(upstream.Server)
if err != nil {
server := upstream.Server + ":25565"
if host, port, err = net.SplitHostPort(server); err != nil {
log.Error("Invalid upstream server: " + upstream.Server)
return false
}
log.Infof("no port information found in %s, assume 25565", upstream.Server)
upstream.Server = server
}
p, err := strconv.ParseUint(port, 10, 16)
if err != nil {
log.Errorf("Invalid port %s: %s", port, err.Error())
return false
}
host = strings.ToLower(host)
if !CheckHost(host) {
log.Error("Invalid upstream host: " + host)
return false
}
upstream.Server = net.JoinHostPort(host, fmt.Sprintf("%d", p))
upstream.Pattern = strings.ToLower(upstream.Pattern)
if !CheckPattern(upstream.Pattern) {
log.Error("Invalid pattern: " + upstream.Pattern)
return false
}
if upstream.ErrorMsg.Text == "" {
log.Warnf("Empty error text for %s, use default string", upstream.Server)
upstream.ErrorMsg.Text = "Connection failed to " + upstream.Server
}
upstream.ChatMsg = ToChatMsg(&upstream.ErrorMsg)
return true
}
func ServerSocket() {
addr, err := net.ResolveTCPAddr("tcp", config.Listen_addr)
if err != nil {
log.Fatalf("error parse address %s: %s", config.Listen_addr, err.Error())
}
s, err := net.ListenTCP("tcp", addr)
if err != nil {
log.Fatalf("error listening on %s: %s", config.Listen_addr, err.Error())
}
log.Infof("Server listened on %s", config.Listen_addr)
for {
conn, err := s.AcceptTCP()
if err != nil {
log.Warnf("listen_socket: error when accepting: %s", err.Error())
continue
}
go func(conn *WrapedSocket) {
event := new(PostAcceptEvent)
event.RemoteAddr = conn.RemoteAddr().(*net.TCPAddr)
event.connID = conn.Id()
PostAccept(event)
if event.Rejected() {
conn.Warnf("connection rejected.")
conn.Close()
return
}
log.Infof("connection accepted.")
ClientSocket(conn, event)
}(WrapClientSocket(conn))
}
}
func (upstream *Upstream) GetExtra(path string) (val interface{}, err error) {
defer func() {
if r := recover(); r != nil {
log.Errorf("Recovered panic: upstream.GetExtra(%s), err=%+v", path, r)
log.Debugf("Upstream: %+v", upstream)
val = nil
err = errors.New("panic when getting config.")
return
}
}()
paths := strings.Split(path, ".")
cur := reflect.ValueOf(upstream.Extras)
// ROOT can't be an array, so assume no config path starts with #
for _, path := range paths {
index := strings.Split(path, "#")
prefix, index := index[0], index[1:]
if cur.Kind() != reflect.Map {
log.Warnf("upstream.GetExtra(%s): unable to fetch key %s, not a map.", path, prefix)
return nil, fmt.Errorf("index key on non-map type")
}
cur = reflect.ValueOf(cur.MapIndex(reflect.ValueOf(prefix)).Interface())
for _, idx := range index {
i, err := strconv.ParseInt(idx, 0, 0)
if err != nil {
log.Errorf("upstream.GetExtra(%s): unable to parse %s: %s", path, idx, err.Error())
return nil, fmt.Errorf("Unable to parse %s: %s", idx, err.Error())
}
if cur.Kind() != reflect.Slice {
log.Warnf("upstream.GetExtra(%s): unable to index value, not a slice", path)
return nil, errors.New("Unable to index value, not a slice.")
}
if int(i) >= cur.Len() {
log.Warnf("upstream.GetExtra(%s): index %d out of range", path, i)
return nil, errors.New("Index out of range.")
}
cur = reflect.ValueOf(cur.Index(int(i)).Interface())
}
}
return cur.Interface(), nil
}
func GetUpstream(hostname string) (upstream *Upstream, err *mcchat.ChatMsg) {
config_lock.Lock()
defer config_lock.Unlock()
log.Debugf("hostname=%s", hostname)
for _, u := range config.Upstream {
log.Debugf("pattern=%s", u.Pattern)
if matched, _ := path.Match(u.Pattern, hostname); matched {
log.Infof("matched server: %s", u.Server)
return u, nil
}
}
log.Warnf("no match for %s", hostname)
return nil, config.chatNotFound
}
func ToChatMsg(msg *ChatMessage) (res *mcchat.ChatMsg) {
res = mcchat.NewMsg(msg.Text)
msg.Color = strings.ToLower(msg.Color)
if msg.Color != "" {
color := mcchat.GetColor(msg.Color)
if color == -1 {
log.Warnf("Invalid color: %s, assume white.", msg.Color)
msg.Color = "white"
color = mcchat.GetColor("white")
}
res.SetColor(color)
}
res.SetBold(msg.Bold)
res.SetItalic(msg.Italic)
res.SetUnderlined(msg.Underlined)
res.SetStrikeThrough(msg.Strikethrough)
if msg.Hover != "" {
res.HoverMsg(msg.Hover)
}
if msg.Click != "" {
res.ClickTarget(msg.Click)
}
return
}
func (event *NetworkEvent) Warnf(format string, v ...interface{}) {
if event.log_prefix == "" {
event.log_prefix = fmt.Sprintf("[#%d %s]", event.connID, event.RemoteAddr)
}
log.Warnf(event.log_prefix+format, v...)
}
func (ws *WrapedSocket) Warnf(format string, v ...interface{}) {
log.Warnf(ws.log_prefix+format, v...)
}
