Tidy up address handling
This commit is contained in:
Matt Joiner
parent
1460e835c2
commit
86de81fba8
108
client.go
108
client.go
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@ -133,18 +133,20 @@ type Client struct {
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dataWaits map[*torrent][]dataWait
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}
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func (me *Client) ListenAddr() net.Addr {
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return me.listener.Addr()
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func (me *Client) ListenAddr() (addr net.Addr) {
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for _, l := range me.listeners {
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if addr != nil && l.Addr().String() != addr.String() {
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panic("listeners exist on different addresses")
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}
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addr = l.Addr()
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}
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return
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}
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func (cl *Client) WriteStatus(w io.Writer) {
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cl.mu.LevelLock(1)
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defer cl.mu.Unlock()
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if cl.listener != nil {
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fmt.Fprintf(w, "Listening on %s\n", cl.listener.Addr())
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} else {
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fmt.Fprintf(w, "No listening torrent port!\n")
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}
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fmt.Fprintf(w, "Listening on %s\n", cl.ListenAddr())
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fmt.Fprintf(w, "Peer ID: %q\n", cl.peerID)
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fmt.Fprintf(w, "Half open outgoing connections: %d\n", cl.halfOpen)
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fmt.Fprintf(w, "Handshaking: %d\n", cl.handshaking)
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@ -386,36 +388,31 @@ func (me *Client) initiateConn(peer Peer, torrent *torrent) {
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}()
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}
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// The port number for incoming peer connections. 0 if the client isn't
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// listening.
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func (cl *Client) incomingPeerPort() int {
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if cl.listener == nil {
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listenAddr := cl.ListenAddr()
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if listenAddr == nil {
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return 0
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}
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_, p, err := net.SplitHostPort(cl.listener.Addr().String())
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if err != nil {
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panic(err)
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}
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var i int
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_, err = fmt.Sscanf(p, "%d", &i)
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if err != nil {
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panic(err)
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}
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return i
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return addrPort(listenAddr)
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}
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// Convert a net.Addr to its compact IP representation. Either 4 or 16 bytes per "yourip" field of http://www.bittorrent.org/beps/bep_0010.html.
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// Convert a net.Addr to its compact IP representation. Either 4 or 16 bytes
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// per "yourip" field of http://www.bittorrent.org/beps/bep_0010.html.
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func addrCompactIP(addr net.Addr) (string, error) {
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switch typed := addr.(type) {
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case *net.TCPAddr:
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if v4 := typed.IP.To4(); v4 != nil {
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if len(v4) != 4 {
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panic(v4)
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}
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return string(v4), nil
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}
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return string(typed.IP.To16()), nil
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default:
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return "", fmt.Errorf("unhandled type: %T", addr)
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host, _, err := net.SplitHostPort(addr.String())
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if err != nil {
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return "", err
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}
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ip := net.ParseIP(host)
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if v4 := ip.To4(); v4 != nil {
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if len(v4) != 4 {
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panic(v4)
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}
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return string(v4), nil
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}
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return string(ip.To16()), nil
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}
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func handshakeWriter(w io.WriteCloser, bb <-chan []byte, done chan<- error) {
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@ -757,6 +754,19 @@ type peerExchangeMessage struct {
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Dropped []tracker.Peer `bencode:"dropped"`
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}
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// Extracts the port as an integer from an address string.
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func addrPort(addr net.Addr) int {
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_, port, err := net.SplitHostPort(addr.String())
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if err != nil {
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panic(err)
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}
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i64, err := strconv.ParseInt(port, 0, 0)
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if err != nil {
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panic(err)
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}
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return int(i64)
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}
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// Processes incoming bittorrent messages. The client lock is held upon entry
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// and exit.
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func (me *Client) connectionLoop(t *torrent, c *connection) error {
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@ -960,17 +970,14 @@ func (me *Client) connectionLoop(t *torrent, c *connection) error {
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if me.dHT == nil {
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break
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}
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addr, _ := c.Socket.RemoteAddr().(*net.TCPAddr)
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_, err = me.dHT.Ping(&net.UDPAddr{
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IP: addr.IP,
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Zone: addr.Zone,
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Port: func() int {
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if msg.Port == 0 {
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return addr.Port
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}
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return int(msg.Port)
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}(),
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})
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pingAddr, err := net.ResolveUDPAddr("", c.Socket.RemoteAddr().String())
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if err != nil {
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panic(err)
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}
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if msg.Port != 0 {
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pingAddr.Port = int(msg.Port)
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}
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_, err = me.dHT.Ping(pingAddr)
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default:
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err = fmt.Errorf("received unknown message type: %#v", msg.Type)
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}
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@ -1223,23 +1230,6 @@ func (me *Client) AddTorrentFromFile(name string) (err error) {
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return me.AddTorrent(mi)
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}
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func (cl *Client) listenerAnnouncePort() (port int16) {
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l := cl.listener
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if l == nil {
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return
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}
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addr := l.Addr()
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switch data := addr.(type) {
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case *net.TCPAddr:
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return int16(data.Port)
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case *net.UDPAddr:
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return int16(data.Port)
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default:
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log.Printf("unknown listener addr type: %T", addr)
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}
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return
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}
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func (cl *Client) announceTorrentDHT(t *torrent) {
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for {
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ps, err := cl.dHT.GetPeers(string(t.InfoHash[:]))
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@ -1285,7 +1275,7 @@ func (cl *Client) announceTorrent(t *torrent) {
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req := tracker.AnnounceRequest{
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Event: tracker.Started,
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NumWant: -1,
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Port: cl.listenerAnnouncePort(),
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Port: int16(cl.incomingPeerPort()),
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PeerId: cl.peerID,
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InfoHash: t.InfoHash,
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}
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