Remove copy/paste signalling

client/lib/rendezvous.go

@@ -1,26 +1,20 @@
 // WebRTC rendezvous requires the exchange of SessionDescriptions between
 // peers in order to establish a PeerConnection.
 //
-// This file contains the two methods currently available to Snowflake:
+// This file contains the one method currently available to Snowflake:
 //
 // - Domain-fronted HTTP signaling. The Broker automatically exchange offers
 //   and answers between this client and some remote WebRTC proxy.
-//   (This is the recommended default, enabled via the flags in "torrc".)
-//
-// - Manual copy-paste signaling. User must create a signaling pipe.
-//   (The flags in torrc-manual allow this)
+
 package lib
 
 import (
-	"bufio"
 	"bytes"
 	"errors"
 	"io/ioutil"
 	"log"
 	"net/http"
 	"net/url"
-	"os"
-	"syscall"
 
 	"github.com/keroserene/go-webrtc"
 )
@@ -143,71 +137,3 @@ func (w WebRTCDialer) Catch() (Snowflake, error) {
 	err := connection.Connect()
 	return connection, err
 }
-
-// CopyPasteDialer handles the interaction required to copy-paste the
-// offers and answers.
-// Implements |Tongue| interface to catch snowflakes manually.
-// Supports recovery of connections.
-type CopyPasteDialer struct {
-	webrtcConfig *webrtc.Configuration
-	signal       *os.File
-	current      *WebRTCPeer
-}
-
-func NewCopyPasteDialer(iceServers IceServerList) *CopyPasteDialer {
-	log.Println("No HTTP signaling detected. Using manual copy-paste signaling.")
-	log.Println("Waiting for a \"signal\" pipe...")
-	// This FIFO receives signaling messages.
-	err := syscall.Mkfifo("signal", 0600)
-	if err != nil {
-		if syscall.EEXIST != err.(syscall.Errno) {
-			log.Fatal(err)
-		}
-	}
-	signalFile, err := os.OpenFile("signal", os.O_RDONLY, 0600)
-	if nil != err {
-		log.Fatal(err)
-		return nil
-	}
-	config := webrtc.NewConfiguration(iceServers...)
-	dialer := &CopyPasteDialer{
-		webrtcConfig: config,
-		signal:       signalFile,
-	}
-	go dialer.readSignals()
-	return dialer
-}
-
-// Initialize a WebRTC Peer via manual copy-paste.
-func (d *CopyPasteDialer) Catch() (Snowflake, error) {
-	if nil == d.signal {
-		return nil, errors.New("Cannot copy-paste dial without signal pipe.")
-	}
-	connection := NewWebRTCPeer(d.webrtcConfig, nil)
-	// Must keep track of pending new connection until copy-paste completes.
-	d.current = connection
-	// Outputs SDP offer to log, expecting user to copy-paste to the remote Peer.
-	// Blocks until user pastes back the answer.
-	err := connection.Connect()
-	d.current = nil
-	return connection, err
-}
-
-// Manual copy-paste signalling.
-func (d *CopyPasteDialer) readSignals() {
-	defer d.signal.Close()
-	log.Printf("CopyPasteDialer: reading messages from signal pipe.")
-	s := bufio.NewScanner(d.signal)
-	for s.Scan() {
-		msg := s.Text()
-		sdp := webrtc.DeserializeSessionDescription(msg)
-		if sdp == nil {
-			log.Printf("CopyPasteDialer: ignoring invalid signal message %+q", msg)
-			continue
-		}
-		d.current.answerChannel <- sdp
-	}
-	if err := s.Err(); err != nil {
-		log.Printf("signal FIFO: %s", err)
-	}
-}