mirror of
https://github.com/cwinfo/yggdrasil-go.git
synced 2024-12-23 08:45:39 +00:00
Clean up
This commit is contained in:
Neil Alexander
parent
9c6cf50684
commit
81545fd9bf
@ -54,7 +54,7 @@ func (l *awdl) create(fromAWDL chan []byte, toAWDL chan []byte, name, local, rem
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toAWDL: toAWDL,
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}
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s := stream{}
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s.init(rwc, nil)
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s.init(rwc)
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link, err := l.core.link.create(&s, name, "awdl", local, remote)
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if err != nil {
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return nil, err
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@ -63,7 +63,6 @@ func (l *awdl) create(fromAWDL chan []byte, toAWDL chan []byte, name, local, rem
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link: link,
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rwc: rwc,
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}
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intf.stream.init(intf.rwc, nil)
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l.mutex.Lock()
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l.interfaces[name] = &intf
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l.mutex.Unlock()
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@ -208,109 +208,3 @@ func (intf *linkInterface) handler() error {
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////////////////////////////////////////////////////////////////////////////////
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return nil
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}
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/*
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func (intf *linkInterface) start() {
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myLinkPub, myLinkPriv := crypto.NewBoxKeys()
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meta := version_getBaseMetadata()
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meta.box = intf.link.core.boxPub
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meta.sig = intf.link.core.sigPub
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meta.link = *myLinkPub
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metaBytes := meta.encode()
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//intf.link.core.log.Println("start: intf.tolink <- metaBytes")
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intf.tolink <- metaBytes
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//intf.link.core.log.Println("finish: intf.tolink <- metaBytes")
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//intf.link.core.log.Println("start: metaBytes = <-intf.fromlink")
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metaBytes = <-intf.fromlink
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//intf.link.core.log.Println("finish: metaBytes = <-intf.fromlink")
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meta = version_metadata{}
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if !meta.decode(metaBytes) || !meta.check() {
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intf.link.core.log.Println("Metadata decode failure")
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return
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}
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base := version_getBaseMetadata()
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if meta.ver > base.ver || meta.ver == base.ver && meta.minorVer > base.minorVer {
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intf.link.core.log.Println("Failed to connect to node: " + intf.name + " version: " + fmt.Sprintf("%d.%d", meta.ver, meta.minorVer))
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return
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}
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shared := crypto.GetSharedKey(myLinkPriv, &meta.link)
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intf.peer = intf.link.core.peers.newPeer(&meta.box, &meta.sig, shared, intf.name)
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if intf.peer == nil {
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intf.link.mutex.Lock()
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delete(intf.link.interfaces, intf.name)
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intf.link.mutex.Unlock()
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return
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}
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intf.peer.linkOut = make(chan []byte, 1) // protocol traffic
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intf.peer.out = func(msg []byte) {
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defer func() { recover() }()
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intf.tolink <- msg
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} // called by peer.sendPacket()
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intf.link.core.switchTable.idleIn <- intf.peer.port // notify switch that we're idle
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intf.peer.close = func() {
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close(intf.fromlink)
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close(intf.tolink)
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}
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go intf.handler()
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go intf.peer.linkLoop()
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}
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func (l *link) getInterface(identity string) *linkInterface {
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l.mutex.RLock()
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defer l.mutex.RUnlock()
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if intf, ok := l.interfaces[identity]; ok {
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return intf
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}
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return nil
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}
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func (l *link) shutdown(identity string) error {
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if intf, ok := l.interfaces[identity]; ok {
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intf.shutdown <- true
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l.core.peers.removePeer(intf.peer.port)
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l.mutex.Lock()
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delete(l.interfaces, identity)
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l.mutex.Unlock()
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return nil
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} else {
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return fmt.Errorf("interface '%s' doesn't exist or already shutdown", identity)
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}
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}
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func (ai *linkInterface) handler() {
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send := func(msg []byte) {
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ai.tolink <- msg
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atomic.AddUint64(&ai.peer.bytesSent, uint64(len(msg)))
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util.PutBytes(msg)
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}
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for {
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timerInterval := tcp_ping_interval
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timer := time.NewTimer(timerInterval)
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defer timer.Stop()
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select {
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case p := <-ai.peer.linkOut:
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send(p)
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continue
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default:
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}
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timer.Stop()
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select {
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case <-timer.C:
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default:
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}
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timer.Reset(timerInterval)
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select {
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case _ = <-timer.C:
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send([]byte{})
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case p := <-ai.peer.linkOut:
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send(p)
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continue
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case r := <-ai.fromlink:
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ai.peer.handlePacket(r)
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ai.link.core.switchTable.idleIn <- ai.peer.port
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case <-ai.shutdown:
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return
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}
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}
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}
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*/
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@ -14,8 +14,6 @@ var _ = linkInterfaceMsgIO(&stream{})
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type stream struct {
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rwc io.ReadWriteCloser
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inputBuffer []byte // Incoming packet stream
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// TODO remove the rest, it shouldn't matter in the long run
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handlePacket func([]byte)
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}
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func (s *stream) close() error {
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@ -26,11 +24,9 @@ const streamMsgSize = 2048 + 65535
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var streamMsg = [...]byte{0xde, 0xad, 0xb1, 0x75} // "dead bits"
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func (s *stream) init(rwc io.ReadWriteCloser, in func([]byte)) {
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func (s *stream) init(rwc io.ReadWriteCloser) {
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// TODO have this also do the metadata handshake and create the peer struct
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s.rwc = rwc
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s.handlePacket = in
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// TODO call something to do the metadata exchange
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}
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@ -112,31 +108,6 @@ func (s *stream) _recvMetaBytes() ([]byte, error) {
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return metaBytes, nil
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}
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// This reads from the channel into a []byte buffer for incoming messages. It
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// copies completed messages out of the cache into a new slice, and passes them
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// to the peer struct via the provided `in func([]byte)` argument. Then it
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// shifts the incomplete fragments of data forward so future reads won't
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// overwrite it.
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func (s *stream) handleInput(bs []byte) error {
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if len(bs) > 0 {
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s.inputBuffer = append(s.inputBuffer, bs...)
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buf := s.inputBuffer
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msg, ok, err2 := stream_chopMsg(&buf)
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if err2 != nil {
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return fmt.Errorf("message error: %v", err2)
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}
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if !ok {
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// We didn't get the whole message yet
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return nil
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}
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newMsg := append(util.GetBytes(), msg...)
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s.inputBuffer = append(s.inputBuffer[:0], buf...)
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s.handlePacket(newMsg)
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util.Yield() // Make sure we give up control to the scheduler
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}
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return nil
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}
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// This takes a pointer to a slice as an argument. It checks if there's a
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// complete message and, if so, slices out those parts and returns the message,
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// true, and nil. If there's no error, but also no complete message, it returns
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@ -20,14 +20,11 @@ import (
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"math/rand"
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"net"
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"sync"
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"sync/atomic"
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"time"
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"golang.org/x/net/proxy"
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"github.com/yggdrasil-network/yggdrasil-go/src/address"
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"github.com/yggdrasil-network/yggdrasil-go/src/crypto"
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"github.com/yggdrasil-network/yggdrasil-go/src/util"
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)
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const default_timeout = 6 * time.Second
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@ -284,7 +281,7 @@ func (iface *tcpInterface) handler(sock net.Conn, incoming bool) {
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defer sock.Close()
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iface.setExtraOptions(sock)
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stream := stream{}
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stream.init(sock, nil)
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stream.init(sock)
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local, _, _ := net.SplitHostPort(sock.LocalAddr().String())
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remote, _, _ := net.SplitHostPort(sock.RemoteAddr().String())
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name := "tcp://" + sock.RemoteAddr().String()
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@ -297,185 +294,3 @@ func (iface *tcpInterface) handler(sock net.Conn, incoming bool) {
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err = link.handler()
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iface.core.log.Println("DEBUG: stopped handler for", name, err)
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}
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// This exchanges/checks connection metadata, sets up the peer struct, sets up the writer goroutine, and then runs the reader within the current goroutine.
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// It defers a bunch of cleanup stuff to tear down all of these things when the reader exists (e.g. due to a closed connection or a timeout).
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func (iface *tcpInterface) handler_old(sock net.Conn, incoming bool) {
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defer sock.Close()
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iface.setExtraOptions(sock)
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// Get our keys
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myLinkPub, myLinkPriv := crypto.NewBoxKeys() // ephemeral link keys
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meta := version_getBaseMetadata()
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meta.box = iface.core.boxPub
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meta.sig = iface.core.sigPub
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meta.link = *myLinkPub
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metaBytes := meta.encode()
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_, err := sock.Write(metaBytes)
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if err != nil {
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return
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}
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if iface.timeout > 0 {
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sock.SetReadDeadline(time.Now().Add(iface.timeout))
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}
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_, err = sock.Read(metaBytes)
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if err != nil {
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return
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}
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meta = version_metadata{} // Reset to zero value
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if !meta.decode(metaBytes) || !meta.check() {
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// Failed to decode and check the metadata
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// If it's a version mismatch issue, then print an error message
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base := version_getBaseMetadata()
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if meta.meta == base.meta {
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if meta.ver > base.ver {
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iface.core.log.Println("Failed to connect to node:", sock.RemoteAddr().String(), "version:", meta.ver)
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} else if meta.ver == base.ver && meta.minorVer > base.minorVer {
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iface.core.log.Println("Failed to connect to node:", sock.RemoteAddr().String(), "version:", fmt.Sprintf("%d.%d", meta.ver, meta.minorVer))
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}
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}
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// TODO? Block forever to prevent future connection attempts? suppress future messages about the same node?
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return
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}
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remoteAddr, _, e1 := net.SplitHostPort(sock.RemoteAddr().String())
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localAddr, _, e2 := net.SplitHostPort(sock.LocalAddr().String())
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if e1 != nil || e2 != nil {
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return
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}
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info := tcpInfo{ // used as a map key, so don't include ephemeral link key
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box: meta.box,
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sig: meta.sig,
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localAddr: localAddr,
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remoteAddr: remoteAddr,
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}
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if iface.isAlreadyConnected(info) {
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return
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}
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// Quit the parent call if this is a connection to ourself
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equiv := func(k1, k2 []byte) bool {
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for idx := range k1 {
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if k1[idx] != k2[idx] {
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return false
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}
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}
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return true
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}
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if equiv(meta.box[:], iface.core.boxPub[:]) {
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return
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}
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if equiv(meta.sig[:], iface.core.sigPub[:]) {
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return
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}
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// Check if we're authorized to connect to this key / IP
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if incoming && !iface.core.peers.isAllowedEncryptionPublicKey(&meta.box) {
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// Allow unauthorized peers if they're link-local
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raddrStr, _, _ := net.SplitHostPort(sock.RemoteAddr().String())
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raddr := net.ParseIP(raddrStr)
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if !raddr.IsLinkLocalUnicast() {
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return
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}
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}
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// Check if we already have a connection to this node, close and block if yes
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iface.mutex.Lock()
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/*if blockChan, isIn := iface.conns[info]; isIn {
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iface.mutex.Unlock()
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sock.Close()
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<-blockChan
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return
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}*/
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blockChan := make(chan struct{})
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iface.conns[info] = blockChan
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iface.mutex.Unlock()
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defer func() {
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iface.mutex.Lock()
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delete(iface.conns, info)
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iface.mutex.Unlock()
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close(blockChan)
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}()
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// Note that multiple connections to the same node are allowed
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// E.g. over different interfaces
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p := iface.core.peers.newPeer(&meta.box, &meta.sig, crypto.GetSharedKey(myLinkPriv, &meta.link), sock.RemoteAddr().String())
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p.linkOut = make(chan []byte, 1)
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out := make(chan []byte, 1)
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defer close(out)
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go func() {
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// This goroutine waits for outgoing packets, link protocol traffic, or sends idle keep-alive traffic
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send := func(msg []byte) {
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msgLen := wire_encode_uint64(uint64(len(msg)))
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buf := net.Buffers{streamMsg[:], msgLen, msg}
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buf.WriteTo(sock)
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atomic.AddUint64(&p.bytesSent, uint64(len(streamMsg)+len(msgLen)+len(msg)))
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util.PutBytes(msg)
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}
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timerInterval := tcp_ping_interval
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timer := time.NewTimer(timerInterval)
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defer timer.Stop()
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for {
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select {
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case msg := <-p.linkOut:
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// Always send outgoing link traffic first, if needed
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send(msg)
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continue
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default:
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}
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// Otherwise wait reset the timer and wait for something to do
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timer.Stop()
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select {
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case <-timer.C:
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default:
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}
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timer.Reset(timerInterval)
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select {
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case _ = <-timer.C:
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send(nil) // TCP keep-alive traffic
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case msg := <-p.linkOut:
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send(msg)
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case msg, ok := <-out:
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if !ok {
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return
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}
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send(msg) // Block until the socket write has finished
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// Now inform the switch that we're ready for more traffic
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p.core.switchTable.idleIn <- p.port
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}
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}
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}()
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p.core.switchTable.idleIn <- p.port // Start in the idle state
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p.out = func(msg []byte) {
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defer func() { recover() }()
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out <- msg
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}
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p.close = func() { sock.Close() }
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go p.linkLoop()
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defer func() {
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// Put all of our cleanup here...
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p.core.peers.removePeer(p.port)
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}()
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us, _, _ := net.SplitHostPort(sock.LocalAddr().String())
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them, _, _ := net.SplitHostPort(sock.RemoteAddr().String())
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themNodeID := crypto.GetNodeID(&meta.box)
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themAddr := address.AddrForNodeID(themNodeID)
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themAddrString := net.IP(themAddr[:]).String()
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themString := fmt.Sprintf("%s@%s", themAddrString, them)
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iface.core.log.Printf("Connected: %s, source: %s", themString, us)
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//iface.stream.init(sock, p.handlePacket)
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bs := make([]byte, 2*streamMsgSize)
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var n int
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for {
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if iface.timeout > 0 {
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sock.SetReadDeadline(time.Now().Add(iface.timeout))
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}
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n, err = sock.Read(bs)
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if err != nil {
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break
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}
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if n > 0 {
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//iface.stream.handleInput(bs[:n])
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}
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}
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if err == nil {
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iface.core.log.Printf("Disconnected: %s, source: %s", themString, us)
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} else {
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iface.core.log.Printf("Disconnected: %s, source: %s, error: %s", themString, us, err)
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}
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return
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}
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