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Send and receive on loopback tunnel interface

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This commit is contained in:
Milos Gajdos 2019-08-14 13:00:10 +01:00
parent e607485c6b
commit 151bcf0ea1
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GPG Key ID: 8B31058CC55DFD4F
2 changed files with 47 additions and 50 deletions
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29
tunnel/default.go
View File

@ -131,6 +131,9 @@ func (t *tun) process() {
// set the session id
newMsg.Header["Micro-Tunnel-Session"] = msg.session
// set the tunnel token
newMsg.Header["Micro-Tunnel-Token"] = t.token
// send the message via the interface
t.RLock()
if len(t.links) == 0 {
@ -150,6 +153,9 @@ func (t *tun) process() {
// process incoming messages
func (t *tun) listen(link transport.Socket) {
// loopback flag
var loopback bool
for {
// process anything via the net interface
msg := new(transport.Message)
@ -159,26 +165,19 @@ func (t *tun) listen(link transport.Socket) {
return
}
// loopback flag
var loopback bool
// TODO: figure out the way how to populate Micro-Tunnel-Token for every message
switch msg.Header["Micro-Tunnel"] {
case "connect":
// check the Micro-Tunnel-Token
token, ok := msg.Header["Micro-Tunnel-Token"]
if ok {
if !ok {
continue
}
// are we connecting to ourselves?
if token == t.token {
loopback = true
}
}
switch msg.Header["Micro-Tunnel"] {
case "connect":
// connecting without token is not allowed
if token == "" {
continue
}
case "close":
// TODO: handle the close message
// maybe report io.EOF or kill the link
@ -193,8 +192,6 @@ func (t *tun) listen(link transport.Socket) {
session := msg.Header["Micro-Tunnel-Session"]
delete(msg.Header, "Micro-Tunnel-Session")
// TODO: should we delete Micro-Tunnel-Token header, too?
// if the session id is blank there's nothing we can do
// TODO: check this is the case, is there any reason
// why we'd have a blank session? Is the tunnel
@ -367,6 +364,7 @@ func (t *tun) close() error {
link.Send(&transport.Message{
Header: map[string]string{
"Micro-Tunnel": "close",
"Micro-Tunnel-Token": t.token,
},
})
link.Close()
@ -444,7 +442,6 @@ func (t *tun) Dial(addr string) (Conn, error) {
if !ok {
return nil, errors.New("error dialing " + addr)
}
// set remote
c.remote = addr
// set local

62
tunnel/tunnel_test.go
View File

@ -99,34 +99,34 @@ func TestTunnel(t *testing.T) {
wg.Wait()
}
//func TestLoopbackTunnel(t *testing.T) {
// // create a new tunnel client
// tun := NewTunnel(
// Address("127.0.0.1:9096"),
// Nodes("127.0.0.1:9096"),
// )
//
// // start tunB
// err := tun.Connect()
// if err != nil {
// t.Fatal(err)
// }
// defer tun.Close()
//
// time.Sleep(time.Millisecond * 50)
//
// var wg sync.WaitGroup
//
// // start accepting connections
// // on tunnel A
// wg.Add(1)
// go testAccept(t, tun, &wg)
//
// time.Sleep(time.Millisecond * 50)
//
// // dial and send via B
// testSend(t, tun)
//
// // wait until done
// wg.Wait()
//}
func TestLoopbackTunnel(t *testing.T) {
// create a new tunnel client
tun := NewTunnel(
Address("127.0.0.1:9096"),
Nodes("127.0.0.1:9096"),
)
// start tunB
err := tun.Connect()
if err != nil {
t.Fatal(err)
}
defer tun.Close()
time.Sleep(time.Millisecond * 50)
var wg sync.WaitGroup
// start accepting connections
// on tunnel A
wg.Add(1)
go testAccept(t, tun, &wg)
time.Sleep(time.Millisecond * 50)
// dial and send via B
testSend(t, tun)
// wait until done
wg.Wait()
}