--- a/TODO.txt	Sun Sep 15 12:31:59 2013 -0600
+++ b/TODO.txt	Sun Sep 15 12:42:49 2013 -0600
@@ -4,8 +4,6 @@
 Maybe put auth-related stuff into its own structure inside Client,
 instead of at Client's top level.
 
-Replace inputControl with something like an enum.
-
 Add a way to broadcast status information as negotiation happens or
 disconnects occur. Possibly a new type of object that can be sent on
 Recv along with stanzas. Or use sync.Cond to protect a state

--- a/xmpp/layer3.go	Sun Sep 15 12:31:59 2013 -0600
+++ b/xmpp/layer3.go	Sun Sep 15 12:42:49 2013 -0600
@@ -63,21 +63,19 @@
 // with the server. The control channel controls this loop's
 // activity.
 func writeStream(srvOut chan<- interface{}, cliIn <-chan Stanza,
-	control <-chan int) {
+	control <-chan sendCmd) {
 	defer close(srvOut)
 
 	var input <-chan Stanza
 Loop:
 	for {
 		select {
-		case status := <-control:
-			switch status {
-			case 0:
+		case cmd := <-control:
+			switch cmd {
+			case sendDeny:
 				input = nil
-			case 1:
+			case sendAllow:
 				input = cliIn
-			case -1:
-				break Loop
 			}
 		case x, ok := <-input:
 			if !ok {

--- a/xmpp/xmpp.go	Sun Sep 15 12:31:59 2013 -0600
+++ b/xmpp/xmpp.go	Sun Sep 15 12:42:49 2013 -0600
@@ -37,6 +37,15 @@
 	clientSrv = "xmpp-client"
 )
 
+// Flow control for preventing sending stanzas until negotiation has
+// completed.
+type sendCmd bool
+
+var (
+	sendAllow sendCmd = true
+	sendDeny  sendCmd = false
+)
+
 // A filter can modify the XMPP traffic to or from the remote
 // server. It's part of an Extension. The filter function will be
 // called in a new goroutine, so it doesn't need to return. The filter
@@ -68,7 +77,7 @@
 	saslExpected string
 	authDone     bool
 	handlers     chan *callback
-	inputControl chan int
+	inputControl chan sendCmd
 	// Incoming XMPP stanzas from the remote will be published on
 	// this channel. Information which is used by this library to
 	// set up the XMPP stream will not appear here.
@@ -138,7 +147,7 @@
 	cl.Jid = *jid
 	cl.socket = tcp
 	cl.handlers = make(chan *callback, 100)
-	cl.inputControl = make(chan int)
+	cl.inputControl = make(chan sendCmd)
 	cl.tlsConfig = tlsconf
 	cl.sendFilterAdd = make(chan Filter)
 	cl.recvFilterAdd = make(chan Filter)
@@ -229,7 +238,7 @@
 // the negotiations that precede it). Now we can start accepting
 // traffic from the app.
 func (cl *Client) bindDone() {
-	cl.inputControl <- 1
+	cl.inputControl <- sendAllow
 }
 
 // Start an XMPP session. A typical XMPP client should call this