hid: fix SSL 2.0 autodetection

hid/main.go

@@ -87,7 +87,7 @@ func detectTLS(sysconn syscall.RawConn) (isTLS bool) {
 			isTLS = buf[0]&0x80 != 0 && buf[2] == 1
 			fallthrough
 		case n == 2:
-			isTLS = buf[0] == 22 && buf[1] == 3
+			isTLS = isTLS || buf[0] == 22 && buf[1] == 3
 		case n == 1:
 			isTLS = buf[0] == 22
 		case err == syscall.EAGAIN:
@@ -748,26 +748,29 @@ type writeEvent struct {
 	err     error // write error
 }
 
-// TODO: Port server_context. Maybe we want to keep it in a struct? A better
-// question might be: can we run multiple instances of it?
+// TODO: Maybe we want to keep it in a struct?
+// A better question might be: can we run multiple instances of it?
+var (
+	// network
+
+	listeners []net.Listener
+	clients   = make(map[*client]bool)
+
+	// IRC state
+
 	// XXX: Beware that maps with identifier keys need to be indexed correctly.
 	// We might want to enforce accessor functions for users and channels.
-var (
-	started time.Time // when has the server been started
 
+	started  time.Time                      // when the server has been started
 	users    = make(map[string]*client)     // maps nicknames to clients
 	channels = make(map[string]*channel)    // maps channel names to data
 	whowas   = make(map[string]*whowasInfo) // WHOWAS registry
 
-	config         simpleConfig            // server configuration
-	serverName     string                  // our server name
-	pingInterval   time.Duration           // ping interval
-	maxConnections int                     // max connections allowed or 0
-	motd           []string                // MOTD (none if empty)
-	operators      = make(map[string]bool) // TLS cert. fingerprints for IRCops
-)
+	// event loop
+
+	quitting  bool
+	quitTimer <-chan time.Time
 
-var (
 	sigs     = make(chan os.Signal, 1)
 	conns    = make(chan net.Conn)
 	prepared = make(chan preparedEvent)
@@ -775,11 +778,16 @@ var (
 	writes   = make(chan writeEvent)
 	timers   = make(chan func())
 
-	tlsConf   *tls.Config
-	clients   = make(map[*client]bool)
-	listeners []net.Listener
-	quitting  bool
-	quitTimer <-chan time.Time
+	// configuration
+
+	config         simpleConfig    // server configuration
+	tlsConf        *tls.Config     // TLS connection configuration
+	serverName     string          // our server name
+	pingInterval   time.Duration   // ping interval
+	maxConnections int             // max connections allowed or 0
+	motd           []string        // MOTD (none if empty)
+	catalog        map[int]string  // message catalog for server msgs
+	operators      map[string]bool // TLS certificate fingerprints for IRCops
 )
 
 // Forcefully tear down all connections.
@@ -1073,11 +1081,14 @@ func (c *client) setPingTimer() {
 
 func (c *client) makeReply(id int, ap ...interface{}) string {
 	s := fmt.Sprintf(":%s %03d %s ", serverName, id, c.nicknameOrStar())
-	a := fmt.Sprintf(defaultReplies[id], ap...)
-	return s + a
+	if reply, ok := catalog[id]; ok {
+		return s + fmt.Sprintf(reply, ap...)
+	}
+	return s + fmt.Sprintf(defaultReplies[id], ap...)
 }
 
-// XXX: This way we cannot typecheck the arguments, so we should be careful.
+// XXX: This way simple static analysis cannot typecheck the arguments, so we
+// need to be careful.
 func (c *client) sendReply(id int, args ...interface{}) {
 	c.send(c.makeReply(id, args...))
 }
@@ -3141,23 +3152,57 @@ func ircInitializeTLS() error {
 }
 
 func ircInitializeCatalog() error {
-	// TODO: Not going to use catgets but a simple text file with basic
-	// checking whether the index is used by this daemon at all should do.
+	configCatalog := config["catalog"]
+	if configCatalog == "" {
 		return nil
 	}
 
+	path := resolveFilename(configCatalog, resolveRelativeConfigFilename)
+	if path == "" {
+		return fmt.Errorf("cannot find file: %s", configCatalog)
+	}
+
+	f, err := os.Open(path)
+	if err != nil {
+		return fmt.Errorf("failed reading the MOTD file: %s", err)
+	}
+	defer f.Close()
+
+	scanner := bufio.NewScanner(f)
+	catalog = make(map[int]string)
+	for lineNo := 1; scanner.Scan(); lineNo++ {
+		line := strings.TrimLeft(scanner.Text(), " \t")
+		if line == "" || strings.HasPrefix(line, "#") {
+			continue
+		}
+
+		delim := strings.IndexAny(line, " \t")
+		if delim < 0 {
+			return fmt.Errorf("%s:%d: malformed line", path, lineNo)
+		}
+
+		id, err := strconv.ParseUint(line[:delim], 10, 16)
+		if err != nil {
+			return fmt.Errorf("%s:%d: %s", path, lineNo, err)
+		}
+
+		catalog[int(id)] = line[delim+1:]
+	}
+	return scanner.Err()
+}
+
 func ircInitializeMOTD() error {
 	configMOTD := config["motd"]
 	if configMOTD == "" {
 		return nil
 	}
 
-	pathMOTD := resolveFilename(configMOTD, resolveRelativeConfigFilename)
-	if pathMOTD == "" {
+	path := resolveFilename(configMOTD, resolveRelativeConfigFilename)
+	if path == "" {
 		return fmt.Errorf("cannot find file: %s", configMOTD)
 	}
 
-	f, err := os.Open(pathMOTD)
+	f, err := os.Open(path)
 	if err != nil {
 		return fmt.Errorf("failed reading the MOTD file: %s", err)
 	}
@@ -3281,7 +3326,7 @@ func main() {
 	}
 	if flag.NArg() > 0 {
 		flag.Usage()
-		os.Exit(1)
+		os.Exit(2)
 	}
 
 	config = make(simpleConfig)