Remove mutex and context.

Those should hopefully no longer be necessary as the races
have been fixed in the library.

main.go

@@ -6,7 +6,6 @@ package main
 
 import (
 	"bufio"
-	"context"
 	"crypto/tls"
 	"errors"
 	"fmt"
@@ -33,8 +32,7 @@ type configuration struct {
 	alias    string
 }
 
-func closeAndExit(client *xmpp.Client, cancel context.CancelFunc, err error) {
-	cancel()
+func closeAndExit(client *xmpp.Client, err error) {
 	client.Close()
 	if err != nil {
 		log.Fatal(err)
@@ -353,8 +351,7 @@ func main() {
 
 	iqc := make(chan xmpp.IQ, defaultBufferSize)
 	msgc := make(chan xmpp.Chat, defaultBufferSize)
-	ctx, cancel := context.WithCancel(context.Background())
-	go rcvStanzas(client, iqc, msgc, ctx, cancel)
+	go rcvStanzas(client, iqc, msgc)
 	for _, r := range getopt.Args() {
 		var re recipientsType
 		re.Jid = r
@@ -372,7 +369,7 @@ func main() {
 	for i, recipient := range recipients {
 		validatedJid, err := MarshalJID(recipient.Jid)
 		if err != nil {
-			closeAndExit(client, cancel, err)
+			closeAndExit(client, err)
 		}
 		recipients[i].Jid = validatedJid
 	}
@@ -381,52 +378,52 @@ func main() {
 	case *flagOxGenPrivKeyX25519:
 		validatedOwnJid, err := MarshalJID(user)
 		if err != nil {
-			closeAndExit(client, cancel, err)
+			closeAndExit(client, err)
 		}
 		err = oxGenPrivKey(validatedOwnJid, client, iqc, *flagOxPassphrase, "x25519")
 		if err != nil {
-			closeAndExit(client, cancel, err)
+			closeAndExit(client, err)
 		}
 		os.Exit(0)
 	case *flagOxGenPrivKeyRSA:
 		validatedOwnJid, err := MarshalJID(user)
 		if err != nil {
-			closeAndExit(client, cancel, err)
+			closeAndExit(client, err)
 		}
 		err = oxGenPrivKey(validatedOwnJid, client, iqc, *flagOxPassphrase, "rsa")
 		if err != nil {
-			closeAndExit(client, cancel, err)
+			closeAndExit(client, err)
 		}
 		os.Exit(0)
 	case *flagOxImportPrivKey != "":
 		validatedOwnJid, err := MarshalJID(user)
 		if err != nil {
-			closeAndExit(client, cancel, err)
+			closeAndExit(client, err)
 		}
 		err = oxImportPrivKey(validatedOwnJid, *flagOxImportPrivKey,
 			client, iqc)
 		if err != nil {
-			closeAndExit(client, cancel, err)
+			closeAndExit(client, err)
 		}
 		os.Exit(0)
 	case *flagOxDeleteNodes:
 		validatedOwnJid, err := MarshalJID(user)
 		if err != nil {
-			closeAndExit(client, cancel, err)
+			closeAndExit(client, err)
 		}
 		err = oxDeleteNodes(validatedOwnJid, client, iqc)
 		if err != nil {
-			closeAndExit(client, cancel, err)
+			closeAndExit(client, err)
 		}
 		os.Exit(0)
 	case *flagOx:
 		validatedOwnJid, err := MarshalJID(user)
 		if err != nil {
-			closeAndExit(client, cancel, err)
+			closeAndExit(client, err)
 		}
 		oxPrivKey, err = oxGetPrivKey(validatedOwnJid, *flagOxPassphrase)
 		if err != nil {
-			closeAndExit(client, cancel, err)
+			closeAndExit(client, err)
 		}
 	}
 
@@ -434,7 +431,7 @@ func main() {
 		message, err = httpUpload(client, iqc, tlsConfig.ServerName,
 			*flagHTTPUpload, timeout)
 		if err != nil {
-			closeAndExit(client, cancel, err)
+			closeAndExit(client, err)
 		}
 	}
 
@@ -444,7 +441,7 @@ func main() {
 		// Check if the URI is valid.
 		uri, err := validURI(message)
 		if err != nil {
-			closeAndExit(client, cancel, err)
+			closeAndExit(client, err)
 		}
 		message = uri.String()
 	}
@@ -467,7 +464,7 @@ func main() {
 				_, err = client.JoinMUCNoHistory(recipient.Jid, alias)
 			}
 			if err != nil {
-				closeAndExit(client, cancel, err)
+				closeAndExit(client, err)
 			}
 		}
 	}
@@ -479,7 +476,7 @@ func main() {
 		// Send raw XML
 		_, err = client.SendOrg(message)
 		if err != nil {
-			closeAndExit(client, cancel, err)
+			closeAndExit(client, err)
 		}
 	case *flagInteractive:
 		// Send in endless loop (for usage with e.g. "tail -f").
@@ -489,18 +486,13 @@ func main() {
 		signal.Notify(c, os.Interrupt)
 		go func() {
 			for range c {
-				closeAndExit(client, cancel, nil)
+				closeAndExit(client, nil)
 			}
 		}()
 		for {
 			message, err = reader.ReadString('\n')
-			select {
-			case <-ctx.Done():
-				return
-			default:
-				if err != nil {
-					closeAndExit(client, cancel, errors.New("failed to read from stdin"))
-				}
+			if err != nil {
+				closeAndExit(client, errors.New("failed to read from stdin"))
 			}
 			message = strings.TrimSuffix(message, "\n")
 
@@ -524,7 +516,7 @@ func main() {
 					}
 					_, err = client.SendOrg(oxMessage)
 					if err != nil {
-						closeAndExit(client, cancel, err)
+						closeAndExit(client, err)
 					}
 				default:
 					_, err = client.Send(xmpp.Chat{
@@ -532,7 +524,7 @@ func main() {
 						Type:   msgType, Text: message,
 					})
 					if err != nil {
-						closeAndExit(client, cancel, err)
+						closeAndExit(client, err)
 					}
 				}
 			}
@@ -544,7 +536,7 @@ func main() {
 		signal.Notify(c, os.Interrupt)
 		go func() {
 			for range c {
-				closeAndExit(client, cancel, nil)
+				closeAndExit(client, nil)
 			}
 		}()
 		for {
@@ -651,7 +643,7 @@ func main() {
 				}
 				_, err = client.SendOrg(oxMessage)
 				if err != nil {
-					closeAndExit(client, cancel, err)
+					closeAndExit(client, err)
 				}
 			default:
 				_, err = client.Send(xmpp.Chat{
@@ -659,10 +651,10 @@ func main() {
 					Type:   msgType, Text: message,
 				})
 				if err != nil {
-					closeAndExit(client, cancel, err)
+					closeAndExit(client, err)
 				}
 			}
 		}
 	}
-	closeAndExit(client, cancel, nil)
+	closeAndExit(client, nil)
 }

stanzahandling.go

@@ -5,7 +5,6 @@
 package main
 
 import (
-	"context"
 	"errors"
 	"fmt"
 	"log"
@@ -44,35 +43,11 @@ func getIQ(id string, c chan xmpp.IQ, iqc chan xmpp.IQ) {
 	}
 }
 
-func rcvStanzas(client *xmpp.Client, iqc chan xmpp.IQ, msgc chan xmpp.Chat, ctx context.Context, cancel context.CancelFunc) {
-	var err error
-	var received interface{}
-	r := make(chan interface{})
+func rcvStanzas(client *xmpp.Client, iqc chan xmpp.IQ, msgc chan xmpp.Chat) {
 	for {
-		select {
-		case <-ctx.Done():
-			return
-		default:
-			go func() {
-				received, err = client.Recv()
-				r <- received
-			}()
-			select {
-			case <-ctx.Done():
-				return
-			case <-r:
-			}
-		}
-		// Don't print errors if the program is getting shut down,
-		// as the errors might be triggered from trying to read from
-		// a closed connection.
-		select {
-		case <-ctx.Done():
-			return
-		default:
-			if err != nil {
-				closeAndExit(client, cancel, err)
-			}
+		received, err := client.Recv()
+		if err != nil {
+			fmt.Println(err)
 		}
 		switch v := received.(type) {
 		case xmpp.Chat: