torrent acceptor host can be configured

torrent/config.go

@@ -25,6 +25,8 @@ type Config struct {
 	// If true, torrent files are saved into <data_dir>/<torrent_id>/<torrent_name>.
 	// Useful if downloading the same torrent from multiple sources.
 	DataDirIncludesTorrentID bool
+	// Host to listen for TCP Acceptor. Port is computed automatically
+	Host string
 	// New torrents will be listened at selected port in this range.
 	PortBegin, PortEnd uint16
 	// At start, client will set max open files limit to this number. (like "ulimit -n" command)
@@ -196,6 +198,7 @@ var DefaultConfig = Config{
 	Database:                               "~/rain/session.db",
 	DataDir:                                "~/rain/data",
 	DataDirIncludesTorrentID:               true,
+	Host:                                   "0.0.0.0",
 	PortBegin:                              20000,
 	PortEnd:                                30000,
 	MaxOpenFiles:                           10240,

torrent/torrent_start.go

@@ -111,7 +111,8 @@ func (t *torrent) startAcceptor() {
 	if t.acceptor != nil {
 		return
 	}
-	listener, err := net.ListenTCP("tcp4", &net.TCPAddr{Port: t.port})
+	ip := net.ParseIP(t.session.config.Host)
+	listener, err := net.ListenTCP("tcp4", &net.TCPAddr{IP: ip, Port: t.port})
 	if err != nil {
 		t.log.Warningf("cannot listen port %d: %s", t.port, err)
 	} else {

torrent/torrent_test.go

@@ -41,6 +41,7 @@ func newTestSession(t *testing.T) (*Session, func()) {
 	cfg.DHTEnabled = false
 	cfg.PEXEnabled = false
 	cfg.RPCEnabled = false
+	cfg.Host = "127.0.0.1"
 	s, err := NewSession(cfg)
 	if err != nil {
 		t.Fatal(err)