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fix some tunnel bugs like races and duplicate messages...

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This commit is contained in:
Asim Aslam
2019-08-10 16:37:49 +01:00
parent c1ff3ceee4
commit 2c66e94045
2 changed files with 13 additions and 10 deletions
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20
tunnel/default.go
View File

@@ -111,25 +111,26 @@ func (t *tun) process() {
for { for {
select { select {
case msg := <-t.send: case msg := <-t.send:
nmsg := &transport.Message{ newMsg := &transport.Message{
Header: msg.data.Header, Header: make(map[string]string),
Body: msg.data.Body, Body: msg.data.Body,
} }
if nmsg.Header == nil { for k, v := range msg.data.Header {
nmsg.Header = make(map[string]string) newMsg.Header[k] = v
} }
// set the tunnel id on the outgoing message // set the tunnel id on the outgoing message
nmsg.Header["Micro-Tunnel-Id"] = msg.id newMsg.Header["Micro-Tunnel-Id"] = msg.id
// set the session id // set the session id
nmsg.Header["Micro-Tunnel-Session"] = msg.session newMsg.Header["Micro-Tunnel-Session"] = msg.session
// send the message via the interface // send the message via the interface
t.RLock() t.RLock()
for _, link := range t.links { for _, link := range t.links {
link.Send(nmsg) log.Debugf("Sending %+v to %s", newMsg, link.Remote())
link.Send(newMsg)
} }
t.RUnlock() t.RUnlock()
case <-t.closed: case <-t.closed:
@@ -170,6 +171,7 @@ func (t *tun) listen(link transport.Socket, listener bool) {
var s *socket var s *socket
var exists bool var exists bool
log.Debugf("Received %+v from %s", msg, link.Remote())
// if its a local listener then we use that as the session id // if its a local listener then we use that as the session id
// e.g we're using a loopback connecting to ourselves // e.g we're using a loopback connecting to ourselves
if listener { if listener {
@@ -189,10 +191,12 @@ func (t *tun) listen(link transport.Socket, listener bool) {
// no socket in existence // no socket in existence
if !exists { if !exists {
log.Debugf("Skipping")
// drop it, we don't care about // drop it, we don't care about
// messages we don't know about // messages we don't know about
continue continue
} }
log.Debugf("Using socket %s %s", s.id, s.session)
// is the socket closed? // is the socket closed?
select { select {
@@ -398,6 +402,7 @@ func (t *tun) Init(opts ...Option) error {
// Dial an address // Dial an address
func (t *tun) Dial(addr string) (Conn, error) { func (t *tun) Dial(addr string) (Conn, error) {
log.Debugf("Tunnel dialing %s", addr)
c, ok := t.newSocket(addr, t.newSession()) c, ok := t.newSocket(addr, t.newSession())
if !ok { if !ok {
return nil, errors.New("error dialing " + addr) return nil, errors.New("error dialing " + addr)
@@ -413,6 +418,7 @@ func (t *tun) Dial(addr string) (Conn, error) {
// Accept a connection on the address // Accept a connection on the address
func (t *tun) Listen(addr string) (Listener, error) { func (t *tun) Listen(addr string) (Listener, error) {
log.Debugf("Tunnel listening on %s", addr)
// create a new socket by hashing the address // create a new socket by hashing the address
c, ok := t.newSocket(addr, "listener") c, ok := t.newSocket(addr, "listener")
if !ok { if !ok {

3
tunnel/listener.go
View File

@@ -48,9 +48,6 @@ func (t *tunListener) process() {
wait: make(chan bool), wait: make(chan bool),
} }
// first message
sock.recv <- m
// save the socket // save the socket
conns[m.session] = sock conns[m.session] = sock