Add title config option

Closes: https://todo.sr.ht/~emersion/soju/146

cmd/soju/main.go

@@ -97,8 +97,8 @@ func main() {
 	}
 
 	srv := soju.NewServer(db)
-	// TODO: load from config/DB
 	srv.Hostname = cfg.Hostname
+	srv.Title = cfg.Title
 	srv.LogPath = cfg.LogPath
 	srv.HTTPOrigins = cfg.HTTPOrigins
 	srv.AcceptProxyIPs = cfg.AcceptProxyIPs

config/config.go

@@ -38,8 +38,9 @@ type TLS struct {
 
 type Server struct {
 	Listen   []string
-	Hostname string
 	TLS      *TLS
+	Hostname string
+	Title    string
 	MOTDPath string
 
 	SQLDriver string
@@ -87,6 +88,14 @@ func parse(cfg scfg.Block) (*Server, error) {
 			if err := d.ParseParams(&srv.Hostname); err != nil {
 				return nil, err
 			}
+		case "title":
+			if err := d.ParseParams(&srv.Title); err != nil {
+				return nil, err
+			}
+		case "motd":
+			if err := d.ParseParams(&srv.MOTDPath); err != nil {
+				return nil, err
+			}
 		case "tls":
 			tls := &TLS{}
 			if err := d.ParseParams(&tls.CertPath, &tls.KeyPath); err != nil {
@@ -129,10 +138,6 @@ func parse(cfg scfg.Block) (*Server, error) {
 			if srv.MaxUserNetworks, err = strconv.Atoi(max); err != nil {
 				return nil, fmt.Errorf("directive %q: %v", d.Name, err)
 			}
-		case "motd":
-			if err := d.ParseParams(&srv.MOTDPath); err != nil {
-				return nil, err
-			}
 		default:
 			return nil, fmt.Errorf("unknown directive %q", d.Name)
 		}

doc/soju.1.scd

@@ -104,6 +104,10 @@ The following directives are supported:
 *hostname* <name>
 	Server hostname (default: system hostname).
 
+*title* <title>
+	Server title. This will be sent as the _ISUPPORT NETWORK_ value when clients
+	don't select a specific network.
+
 *tls* <cert> <key>
 	Enable TLS support. The certificate and the key files must be PEM-encoded.
 

downstream.go

@@ -1157,7 +1157,9 @@ func (dc *downstreamConn) welcome() error {
 	if dc.network != nil {
 		isupport = append(isupport, fmt.Sprintf("BOUNCER_NETID=%v", dc.network.ID))
 	}
-
+	if dc.network == nil && dc.srv.Title != "" {
+		isupport = append(isupport, "NETWORK="+encodeISUPPORT(dc.srv.Title))
+	}
 	if dc.network == nil && dc.caps["soju.im/bouncer-networks"] {
 		isupport = append(isupport, "WHOX")
 	}

irc.go

@@ -761,3 +761,9 @@ func generateWHOXReply(prefix *irc.Prefix, nick, fields string, info *whoxInfo)
 		Params:  append([]string{nick}, params...),
 	}
 }
+
+var isupportEncoder = strings.NewReplacer(" ", "\\x20", "\\", "\\x5C")
+
+func encodeISUPPORT(s string) string {
+	return isupportEncoder.Replace(s)
+}

server.go

@@ -50,6 +50,7 @@ func (l *prefixLogger) Printf(format string, v ...interface{}) {
 
 type Server struct {
 	Hostname        string
+	Title           string
 	Logger          Logger
 	HistoryLimit    int
 	LogPath         string