- Changed IQ stanzas to pointer semantics

- Fixed commands from v 0.4.0 and tests
- Added primitive Result Sets support (XEP-0059)

_examples/custom_stanza/custom_stanza.go

@@ -9,7 +9,10 @@ import (
 )
 
 func main() {
-	iq := stanza.NewIQ(stanza.Attrs{Type: stanza.IQTypeGet, To: "service.localhost", Id: "custom-pl-1"})
+	iq, err := stanza.NewIQ(stanza.Attrs{Type: stanza.IQTypeGet, To: "service.localhost", Id: "custom-pl-1"})
+	if err != nil {
+		log.Fatalf("failed to create IQ: %v", err)
+	}
 	payload := CustomPayload{XMLName: xml.Name{Space: "my:custom:payload", Local: "query"}, Node: "test"}
 	iq.Payload = payload
 
@@ -45,5 +48,5 @@ func (c CustomPayload) Namespace() string {
 }
 
 func init() {
-	stanza.TypeRegistry.MapExtension(stanza.PKTIQ, xml.Name{"my:custom:payload", "query"}, CustomPayload{})
+	stanza.TypeRegistry.MapExtension(stanza.PKTIQ, xml.Name{Space: "my:custom:payload", Local: "query"}, CustomPayload{})
 }

_examples/delegation/delegation.go

@@ -35,7 +35,9 @@ func main() {
 		IQNamespaces("urn:xmpp:delegation:1").
 		HandlerFunc(handleDelegation)
 
-	component, err := xmpp.NewComponent(opts, router)
+	component, err := xmpp.NewComponent(opts, router, func(err error) {
+		log.Println(err)
+	})
 	if err != nil {
 		log.Fatalf("%+v", err)
 	}
@@ -78,7 +80,7 @@ const (
 // ctx.Opts
 func discoInfo(c xmpp.Sender, p stanza.Packet, opts xmpp.ComponentOptions) {
 	// Type conversion & sanity checks
-	iq, ok := p.(stanza.IQ)
+	iq, ok := p.(*stanza.IQ)
 	if !ok {
 		return
 	}
@@ -87,15 +89,18 @@ func discoInfo(c xmpp.Sender, p stanza.Packet, opts xmpp.ComponentOptions) {
 		return
 	}
 
-	iqResp := stanza.NewIQ(stanza.Attrs{Type: "result", From: iq.To, To: iq.From, Id: iq.Id})
+	iqResp, err := stanza.NewIQ(stanza.Attrs{Type: "result", From: iq.To, To: iq.From, Id: iq.Id})
+	if err != nil {
+		log.Fatalf("failed to create IQ response: %v", err)
+	}
 
 	switch info.Node {
 	case "":
-		discoInfoRoot(&iqResp, opts)
+		discoInfoRoot(iqResp, opts)
 	case pubsubNode:
-		discoInfoPubSub(&iqResp)
+		discoInfoPubSub(iqResp)
 	case pepNode:
-		discoInfoPEP(&iqResp)
+		discoInfoPEP(iqResp)
 	}
 
 	_ = c.Send(iqResp)
@@ -155,7 +160,7 @@ func discoInfoPEP(iqResp *stanza.IQ) {
 
 func handleDelegation(s xmpp.Sender, p stanza.Packet) {
 	// Type conversion & sanity checks
-	iq, ok := p.(stanza.IQ)
+	iq, ok := p.(*stanza.IQ)
 	if !ok {
 		return
 	}
@@ -166,7 +171,7 @@ func handleDelegation(s xmpp.Sender, p stanza.Packet) {
 	}
 	forwardedPacket := delegation.Forwarded.Stanza
 	fmt.Println(forwardedPacket)
-	forwardedIQ, ok := forwardedPacket.(stanza.IQ)
+	forwardedIQ, ok := forwardedPacket.(*stanza.IQ)
 	if !ok {
 		return
 	}
@@ -179,7 +184,10 @@ func handleDelegation(s xmpp.Sender, p stanza.Packet) {
 
 	if pubsub.Publish.XMLName.Local == "publish" {
 		// Prepare pubsub IQ reply
-		iqResp := stanza.NewIQ(stanza.Attrs{Type: "result", From: forwardedIQ.To, To: forwardedIQ.From, Id: forwardedIQ.Id})
+		iqResp, err := stanza.NewIQ(stanza.Attrs{Type: "result", From: forwardedIQ.To, To: forwardedIQ.From, Id: forwardedIQ.Id})
+		if err != nil {
+			log.Fatalf("failed to create iqResp: %v", err)
+		}
 		payload := stanza.PubSubGeneric{
 			XMLName: xml.Name{
 				Space: "http://jabber.org/protocol/pubsub",
@@ -188,7 +196,10 @@ func handleDelegation(s xmpp.Sender, p stanza.Packet) {
 		}
 		iqResp.Payload = &payload
 		// Wrap the reply in delegation 'forward'
-		iqForward := stanza.NewIQ(stanza.Attrs{Type: "result", From: iq.To, To: iq.From, Id: iq.Id})
+		iqForward, err := stanza.NewIQ(stanza.Attrs{Type: "result", From: iq.To, To: iq.From, Id: iq.Id})
+		if err != nil {
+			log.Fatalf("failed to create iqForward: %v", err)
+		}
 		delegPayload := stanza.Delegation{
 			XMLName: xml.Name{
 				Space: "urn:xmpp:delegation:1",

_examples/go.mod

@@ -5,7 +5,7 @@ go 1.13
 require (
 	github.com/processone/mpg123 v1.0.0
 	github.com/processone/soundcloud v1.0.0
-	gosrc.io/xmpp v0.1.1
+	gosrc.io/xmpp v0.4.0
 )
 
 replace gosrc.io/xmpp => ./../

_examples/xmpp_chat_client/go.mod

@@ -6,5 +6,5 @@ require (
 	github.com/awesome-gocui/gocui v0.6.1-0.20191115151952-a34ffb055986
 	github.com/spf13/pflag v1.0.5
 	github.com/spf13/viper v1.6.1
-	gosrc.io/xmpp v0.3.1-0.20191223080939-f8f820170e08
+	gosrc.io/xmpp v0.4.0
 )

_examples/xmpp_chat_client/xmpp_chat_client.go

@@ -186,7 +186,7 @@ func startClient(g *gocui.Gui, config *config) {
 
 	// ==========================
 	// Start working
-	updateRosterFromConfig(g, config)
+	updateRosterFromConfig(config)
 	// Sending the default contact in a channel. Default value is the first contact in the list from the config.
 	viewState.currentContact = strings.Split(config.Contacts, configContactSep)[0]
 	// Informing user of the default contact
@@ -283,7 +283,7 @@ func errorHandler(err error) {
 
 // Read the client roster from the config. This does not check with the server that the roster is correct.
 // If user tries to send a message to someone not registered with the server, the server will return an error.
-func updateRosterFromConfig(g *gocui.Gui, config *config) {
+func updateRosterFromConfig(config *config) {
 	viewState.contacts = append(strings.Split(config.Contacts, configContactSep), backFromContacts)
 	// Put a "go back" button at the end of the list
 	viewState.contacts = append(viewState.contacts, backFromContacts)

_examples/xmpp_component/xmpp_component.go

@@ -61,12 +61,16 @@ func handleMessage(_ xmpp.Sender, p stanza.Packet) {
 
 func discoInfo(c xmpp.Sender, p stanza.Packet, opts xmpp.ComponentOptions) {
 	// Type conversion & sanity checks
-	iq, ok := p.(stanza.IQ)
+	iq, ok := p.(*stanza.IQ)
 	if !ok || iq.Type != stanza.IQTypeGet {
 		return
 	}
 
-	iqResp := stanza.NewIQ(stanza.Attrs{Type: "result", From: iq.To, To: iq.From, Id: iq.Id, Lang: "en"})
+	iqResp, err := stanza.NewIQ(stanza.Attrs{Type: "result", From: iq.To, To: iq.From, Id: iq.Id, Lang: "en"})
+	// TODO: fix this...
+	if err != nil {
+		return
+	}
 	disco := iqResp.DiscoInfo()
 	disco.AddIdentity(opts.Name, opts.Category, opts.Type)
 	disco.AddFeatures(stanza.NSDiscoInfo, stanza.NSDiscoItems, "jabber:iq:version", "urn:xmpp:delegation:1")
@@ -76,7 +80,7 @@ func discoInfo(c xmpp.Sender, p stanza.Packet, opts xmpp.ComponentOptions) {
 // TODO: Handle iq error responses
 func discoItems(c xmpp.Sender, p stanza.Packet) {
 	// Type conversion & sanity checks
-	iq, ok := p.(stanza.IQ)
+	iq, ok := p.(*stanza.IQ)
 	if !ok || iq.Type != stanza.IQTypeGet {
 		return
 	}
@@ -86,7 +90,11 @@ func discoItems(c xmpp.Sender, p stanza.Packet) {
 		return
 	}
 
-	iqResp := stanza.NewIQ(stanza.Attrs{Type: "result", From: iq.To, To: iq.From, Id: iq.Id, Lang: "en"})
+	// TODO: fix this...
+	iqResp, err := stanza.NewIQ(stanza.Attrs{Type: "result", From: iq.To, To: iq.From, Id: iq.Id, Lang: "en"})
+	if err != nil {
+		return
+	}
 	items := iqResp.DiscoItems()
 
 	if discoItems.Node == "" {
@@ -97,12 +105,15 @@ func discoItems(c xmpp.Sender, p stanza.Packet) {
 
 func handleVersion(c xmpp.Sender, p stanza.Packet) {
 	// Type conversion & sanity checks
-	iq, ok := p.(stanza.IQ)
+	iq, ok := p.(*stanza.IQ)
 	if !ok {
 		return
 	}
 
-	iqResp := stanza.NewIQ(stanza.Attrs{Type: "result", From: iq.To, To: iq.From, Id: iq.Id, Lang: "en"})
+	iqResp, err := stanza.NewIQ(stanza.Attrs{Type: "result", From: iq.To, To: iq.From, Id: iq.Id, Lang: "en"})
+	if err != nil {
+		return
+	}
 	iqResp.Version().SetInfo("Fluux XMPP Component", "0.0.1", "")
 	_ = c.Send(iqResp)
 }

_examples/xmpp_component2/main.go

@@ -9,9 +9,10 @@ Connect to an XMPP server using XEP 114 protocol, perform a discovery query on t
 import (
 	"context"
 	"fmt"
+	"log"
 	"time"
 
-	xmpp "gosrc.io/xmpp"
+	"gosrc.io/xmpp"
 	"gosrc.io/xmpp/stanza"
 )
 
@@ -53,10 +54,13 @@ func main() {
 	}
 
 	// make a disco iq
-	iqReq := stanza.NewIQ(stanza.Attrs{Type: stanza.IQTypeGet,
+	iqReq, err := stanza.NewIQ(stanza.Attrs{Type: stanza.IQTypeGet,
 		From: domain,
 		To:   "localhost",
 		Id:   "my-iq1"})
+	if err != nil {
+		log.Fatalf("failed to create IQ: %v", err)
+	}
 	disco := iqReq.DiscoInfo()
 	iqReq.Payload = disco
 

_examples/xmpp_jukebox/xmpp_jukebox.go

@@ -81,7 +81,7 @@ func handleMessage(s xmpp.Sender, p stanza.Packet, player *mpg123.Player) {
 }
 
 func handleIQ(s xmpp.Sender, p stanza.Packet, player *mpg123.Player) {
-	iq, ok := p.(stanza.IQ)
+	iq, ok := p.(*stanza.IQ)
 	if !ok {
 		return
 	}
@@ -100,7 +100,7 @@ func handleIQ(s xmpp.Sender, p stanza.Packet, player *mpg123.Player) {
 		setResponse := new(stanza.ControlSetResponse)
 		// FIXME: Broken
 		reply := stanza.IQ{Attrs: stanza.Attrs{To: iq.From, Type: "result", Id: iq.Id}, Payload: setResponse}
-		_ = s.Send(reply)
+		_ = s.Send(&reply)
 		// TODO add Soundclound artist / title retrieval
 		sendUserTune(s, "Radiohead", "Spectre")
 	default:

_examples/xmpp_pubsub_client/xmpp_ps_client.go

@@ -3,6 +3,7 @@ package main
 import (
 	"context"
 	"encoding/xml"
+	"errors"
 	"fmt"
 	"gosrc.io/xmpp"
 	"gosrc.io/xmpp/stanza"
@@ -17,6 +18,8 @@ const (
 	serviceName   = "pubsub.localhost"
 )
 
+var invalidResp = errors.New("invalid response")
+
 func main() {
 
 	config := xmpp.Config{
@@ -52,7 +55,7 @@ func main() {
 	ctx, cancel := context.WithTimeout(context.Background(), 30*time.Second)
 	createNode(ctx, cancel, client)
 
-	// =============================
+	// ================================================================================
 	// Configure the node. This can also be done in a single message with the creation
 	configureNode(ctx, cancel, client)
 
@@ -68,10 +71,17 @@ func main() {
 	// Let's purge the node :
 	purgeRq, _ := stanza.NewPurgeAllItems(serviceName, nodeName)
 	purgeCh, err := client.SendIQ(ctx, purgeRq)
+	if err != nil {
+		log.Fatalf("could not send purge request: %v", err)
+	}
 	select {
 	case purgeResp := <-purgeCh:
-		if purgeResp.Error != nil {
+
+		if purgeResp.Type == stanza.IQTypeError {
 			cancel()
+			if vld, err := purgeResp.IsValid(); !vld {
+				log.Fatalf(invalidResp.Error()+" %v"+" reason: %v", purgeResp, err)
+			}
 			log.Fatalf("error while purging node : %s", purgeResp.Error.Text)
 		}
 		log.Println("node successfully purged")
@@ -97,7 +107,10 @@ func createNode(ctx context.Context, cancel context.CancelFunc, client *xmpp.Cli
 			select {
 			case respCr := <-createCh:
 				// Got response from server
-				if respCr.Error != nil {
+				if respCr.Type == stanza.IQTypeError {
+					if vld, err := respCr.IsValid(); !vld {
+						log.Fatalf(invalidResp.Error()+" %+v"+" reason: %s", respCr, err)
+					}
 					if respCr.Error.Reason != "conflict" {
 						log.Fatalf("%+v", respCr.Error.Text)
 					}
@@ -148,8 +161,11 @@ func configureNode(ctx context.Context, cancel context.CancelFunc, client *xmpp.
 		c, _ := client.SendIQ(ctx, submitConf)
 		select {
 		case confResp := <-c:
-			if confResp.Error != nil {
+			if confResp.Type == stanza.IQTypeError {
 				cancel()
+				if vld, err := confResp.IsValid(); !vld {
+					log.Fatalf(invalidResp.Error()+" %v"+" reason: %v", confResp, err)
+				}
 				log.Fatalf("node configuration failed : %s", confResp.Error.Text)
 			}
 			log.Println("node configuration was successful")

bi_dir_iterator.go

@@ -0,0 +1,12 @@
+package xmpp
+
+type BiDirIterator interface {
+	// Next returns the next element of this iterator, if a response is available within t milliseconds
+	Next(t int) (BiDirIteratorElt, error)
+	// Previous returns the previous element of this iterator, if a response is available within t milliseconds
+	Previous(t int) (BiDirIteratorElt, error)
+}
+
+type BiDirIteratorElt interface {
+	NoOp()
+}

client.go

@@ -264,7 +264,7 @@ func (c *Client) Send(packet stanza.Packet) error {
 //   ctx, _ := context.WithTimeout(context.Background(), 30 * time.Second)
 //   result := <- client.SendIQ(ctx, iq)
 //
-func (c *Client) SendIQ(ctx context.Context, iq stanza.IQ) (chan stanza.IQ, error) {
+func (c *Client) SendIQ(ctx context.Context, iq *stanza.IQ) (chan stanza.IQ, error) {
 	if iq.Attrs.Type != stanza.IQTypeSet && iq.Attrs.Type != stanza.IQTypeGet {
 		return nil, ErrCanOnlySendGetOrSetIq
 	}

client_test.go

@@ -171,7 +171,11 @@ func TestClient_SendIQ(t *testing.T) {
 	client, mock := mockClientConnection(t, h, testClientIqPort)
 
 	ctx, cancel := context.WithTimeout(context.Background(), 30*time.Second)
-	iqReq := stanza.NewIQ(stanza.Attrs{Type: stanza.IQTypeGet, From: "test1@localhost/mremond-mbp", To: defaultServerName, Id: defaultStreamID, Lang: "en"})
+	iqReq, err := stanza.NewIQ(stanza.Attrs{Type: stanza.IQTypeGet, From: "test1@localhost/mremond-mbp", To: defaultServerName, Id: defaultStreamID, Lang: "en"})
+	if err != nil {
+		t.Fatalf("failed to create the IQ request: %v", err)
+	}
+
 	disco := iqReq.DiscoInfo()
 	iqReq.Payload = disco
 
@@ -219,7 +223,10 @@ func TestClient_SendIQFail(t *testing.T) {
 	//==================
 	// Create an IQ to send
 	ctx, cancel := context.WithTimeout(context.Background(), 30*time.Second)
-	iqReq := stanza.NewIQ(stanza.Attrs{Type: stanza.IQTypeGet, From: "test1@localhost/mremond-mbp", To: defaultServerName, Id: defaultStreamID, Lang: "en"})
+	iqReq, err := stanza.NewIQ(stanza.Attrs{Type: stanza.IQTypeGet, From: "test1@localhost/mremond-mbp", To: defaultServerName, Id: defaultStreamID, Lang: "en"})
+	if err != nil {
+		t.Fatalf("failed to create IQ request: %v", err)
+	}
 	disco := iqReq.DiscoInfo()
 	iqReq.Payload = disco
 	// Removing the id to make the stanza invalid. The IQ constructor makes a random one if none is specified
@@ -387,7 +394,7 @@ func handlerClientConnectSuccess(t *testing.T, sc *ServerConn) {
 	checkClientOpenStream(t, sc)
 	sendStreamFeatures(t, sc) // Send initial features
 	readAuth(t, sc.decoder)
-	fmt.Fprintln(sc.connection, "<success xmlns=\"urn:ietf:params:xml:ns:xmpp-sasl\"/>")
+	sc.connection.Write([]byte("<success xmlns=\"urn:ietf:params:xml:ns:xmpp-sasl\"/>"))
 
 	checkClientOpenStream(t, sc) // Reset stream
 	sendBindFeature(t, sc)       // Send post auth features

cmd/fluuxmpp/send.go

@@ -38,7 +38,11 @@ func sendxmpp(cmd *cobra.Command, args []string) {
 		},
 		Jid:        viper.GetString("jid"),
 		Credential: xmpp.Password(viper.GetString("password")),
-	}, xmpp.NewRouter())
+	},
+		xmpp.NewRouter(),
+		func(err error) {
+			log.Println(err)
+		})
 
 	if err != nil {
 		log.Errorf("error when starting xmpp client: %s", err)

component.go

@@ -185,7 +185,7 @@ func (c *Component) sendWithWriter(writer io.Writer, packet []byte) error {
 //   ctx, _ := context.WithTimeout(context.Background(), 30 * time.Second)
 //   result := <- client.SendIQ(ctx, iq)
 //
-func (c *Component) SendIQ(ctx context.Context, iq stanza.IQ) (chan stanza.IQ, error) {
+func (c *Component) SendIQ(ctx context.Context, iq *stanza.IQ) (chan stanza.IQ, error) {
 	if iq.Attrs.Type != stanza.IQTypeSet && iq.Attrs.Type != stanza.IQTypeGet {
 		return nil, ErrCanOnlySendGetOrSetIq
 	}

component_test.go

@@ -93,7 +93,7 @@ func TestGenerateHandshakeId(t *testing.T) {
 
 	// Try connecting, and storing the resulting streamID in a map.
 	m := make(map[string]bool)
-	for _, _ = range uuidsArray {
+	for range uuidsArray {
 		streamId, _ := c.transport.Connect()
 		m[c.handshake(streamId)] = true
 	}
@@ -131,7 +131,10 @@ func TestSendIq(t *testing.T) {
 	c, m := mockComponentConnection(t, testSendIqPort, h)
 
 	ctx, cancel := context.WithTimeout(context.Background(), 30*time.Second)
-	iqReq := stanza.NewIQ(stanza.Attrs{Type: stanza.IQTypeGet, From: "test1@localhost/mremond-mbp", To: defaultServerName, Id: defaultStreamID, Lang: "en"})
+	iqReq, err := stanza.NewIQ(stanza.Attrs{Type: stanza.IQTypeGet, From: "test1@localhost/mremond-mbp", To: defaultServerName, Id: defaultStreamID, Lang: "en"})
+	if err != nil {
+		t.Fatalf("failed to create IQ request: %v", err)
+	}
 	disco := iqReq.DiscoInfo()
 	iqReq.Payload = disco
 
@@ -173,7 +176,10 @@ func TestSendIqFail(t *testing.T) {
 	c, m := mockComponentConnection(t, testSendIqFailPort, h)
 
 	ctx, cancel := context.WithTimeout(context.Background(), 30*time.Second)
-	iqReq := stanza.NewIQ(stanza.Attrs{Type: stanza.IQTypeGet, From: "test1@localhost/mremond-mbp", To: defaultServerName, Id: defaultStreamID, Lang: "en"})
+	iqReq, err := stanza.NewIQ(stanza.Attrs{Type: stanza.IQTypeGet, From: "test1@localhost/mremond-mbp", To: defaultServerName, Id: defaultStreamID, Lang: "en"})
+	if err != nil {
+		t.Fatalf("failed to create IQ request: %v", err)
+	}
 
 	// Removing the id to make the stanza invalid. The IQ constructor makes a random one if none is specified
 	// so we need to overwrite it.

router.go

@@ -42,7 +42,7 @@ func NewRouter() *Router {
 // route is called by the XMPP client to dispatch stanza received using the set up routes.
 // It is also used by test, but is not supposed to be used directly by users of the library.
 func (r *Router) route(s Sender, p stanza.Packet) {
-	iq, isIq := p.(stanza.IQ)
+	iq, isIq := p.(*stanza.IQ)
 	if isIq {
 		r.IQResultRouteLock.RLock()
 		route, ok := r.IQResultRoutes[iq.Id]
@@ -51,7 +51,7 @@ func (r *Router) route(s Sender, p stanza.Packet) {
 			r.IQResultRouteLock.Lock()
 			delete(r.IQResultRoutes, iq.Id)
 			r.IQResultRouteLock.Unlock()
-			route.result <- iq
+			route.result <- *iq
 			close(route.result)
 			return
 		}
@@ -70,7 +70,7 @@ func (r *Router) route(s Sender, p stanza.Packet) {
 	}
 }
 
-func iqNotImplemented(s Sender, iq stanza.IQ) {
+func iqNotImplemented(s Sender, iq *stanza.IQ) {
 	err := stanza.Err{
 		XMLName: xml.Name{Local: "error"},
 		Code:    501,
@@ -232,7 +232,7 @@ func (n nameMatcher) Match(p stanza.Packet, match *RouteMatch) bool {
 	switch p.(type) {
 	case stanza.Message:
 		name = "message"
-	case stanza.IQ:
+	case *stanza.IQ:
 		name = "iq"
 	case stanza.Presence:
 		name = "presence"
@@ -259,7 +259,7 @@ type nsTypeMatcher []string
 func (m nsTypeMatcher) Match(p stanza.Packet, match *RouteMatch) bool {
 	var stanzaType stanza.StanzaType
 	switch packet := p.(type) {
-	case stanza.IQ:
+	case *stanza.IQ:
 		stanzaType = packet.Type
 	case stanza.Presence:
 		stanzaType = packet.Type
@@ -291,7 +291,7 @@ func (r *Route) StanzaType(types ...string) *Route {
 type nsIQMatcher []string
 
 func (m nsIQMatcher) Match(p stanza.Packet, match *RouteMatch) bool {
-	iq, ok := p.(stanza.IQ)
+	iq, ok := p.(*stanza.IQ)
 	if !ok {
 		return false
 	}

router_test.go

@@ -25,7 +25,10 @@ func TestIQResultRoutes(t *testing.T) {
 	// Check if the IQ handler was called
 	ctx, cancel := context.WithTimeout(context.Background(), time.Millisecond*100)
 	defer cancel()
-	iq := stanza.NewIQ(stanza.Attrs{Type: stanza.IQTypeResult, Id: "1234"})
+	iq, err := stanza.NewIQ(stanza.Attrs{Type: stanza.IQTypeResult, Id: "1234"})
+	if err != nil {
+		t.Fatalf("failed to create IQ: %v", err)
+	}
 	res := router.NewIQResultRoute(ctx, "1234")
 	go router.route(conn, iq)
 	select {
@@ -71,7 +74,10 @@ func TestNameMatcher(t *testing.T) {
 
 	// Check that an IQ packet is not matched
 	conn = NewSenderMock()
-	iq := stanza.NewIQ(stanza.Attrs{Type: stanza.IQTypeGet, To: "localhost", Id: "1"})
+	iq, err := stanza.NewIQ(stanza.Attrs{Type: stanza.IQTypeGet, To: "localhost", Id: "1"})
+	if err != nil {
+		t.Fatalf("failed to create IQ: %v", err)
+	}
 	iq.Payload = &stanza.DiscoInfo{}
 	router.route(conn, iq)
 	if conn.String() == successFlag {
@@ -89,7 +95,10 @@ func TestIQNSMatcher(t *testing.T) {
 
 	// Check that an IQ with proper namespace does match
 	conn := NewSenderMock()
-	iqDisco := stanza.NewIQ(stanza.Attrs{Type: stanza.IQTypeGet, To: "localhost", Id: "1"})
+	iqDisco, err := stanza.NewIQ(stanza.Attrs{Type: stanza.IQTypeGet, To: "localhost", Id: "1"})
+	if err != nil {
+		t.Fatalf("failed to create iqDisco: %v", err)
+	}
 	// TODO: Add a function to generate payload with proper namespace initialisation
 	iqDisco.Payload = &stanza.DiscoInfo{
 		XMLName: xml.Name{
@@ -103,7 +112,10 @@ func TestIQNSMatcher(t *testing.T) {
 
 	// Check that another namespace is not matched
 	conn = NewSenderMock()
-	iqVersion := stanza.NewIQ(stanza.Attrs{Type: stanza.IQTypeGet, To: "localhost", Id: "1"})
+	iqVersion, err := stanza.NewIQ(stanza.Attrs{Type: stanza.IQTypeGet, To: "localhost", Id: "1"})
+	if err != nil {
+		t.Fatalf("failed to create iqVersion: %v", err)
+	}
 	// TODO: Add a function to generate payload with proper namespace initialisation
 	iqVersion.Payload = &stanza.DiscoInfo{
 		XMLName: xml.Name{
@@ -146,7 +158,10 @@ func TestTypeMatcher(t *testing.T) {
 
 	// We do not match on other types
 	conn = NewSenderMock()
-	iqVersion := stanza.NewIQ(stanza.Attrs{Type: stanza.IQTypeGet, From: "service.localhost", To: "test@localhost", Id: "1"})
+	iqVersion, err := stanza.NewIQ(stanza.Attrs{Type: stanza.IQTypeGet, From: "service.localhost", To: "test@localhost", Id: "1"})
+	if err != nil {
+		t.Fatalf("failed to create iqVersion: %v", err)
+	}
 	iqVersion.Payload = &stanza.DiscoInfo{
 		XMLName: xml.Name{
 			Space: "jabber:iq:version",
@@ -169,22 +184,31 @@ func TestCompositeMatcher(t *testing.T) {
 		})
 
 	// Data set
-	getVersionIq := stanza.NewIQ(stanza.Attrs{Type: stanza.IQTypeGet, From: "service.localhost", To: "test@localhost", Id: "1"})
+	getVersionIq, err := stanza.NewIQ(stanza.Attrs{Type: stanza.IQTypeGet, From: "service.localhost", To: "test@localhost", Id: "1"})
+	if err != nil {
+		t.Fatalf("failed to create getVersionIq: %v", err)
+	}
 	getVersionIq.Payload = &stanza.Version{
 		XMLName: xml.Name{
 			Space: "jabber:iq:version",
 			Local: "query",
 		}}
 
-	setVersionIq := stanza.NewIQ(stanza.Attrs{Type: stanza.IQTypeSet, From: "service.localhost", To: "test@localhost", Id: "1"})
+	setVersionIq, err := stanza.NewIQ(stanza.Attrs{Type: stanza.IQTypeSet, From: "service.localhost", To: "test@localhost", Id: "1"})
+	if err != nil {
+		t.Fatalf("failed to create setVersionIq: %v", err)
+	}
 	setVersionIq.Payload = &stanza.Version{
 		XMLName: xml.Name{
 			Space: "jabber:iq:version",
 			Local: "query",
 		}}
 
-	GetDiscoIq := stanza.NewIQ(stanza.Attrs{Type: stanza.IQTypeGet, From: "service.localhost", To: "test@localhost", Id: "1"})
+	getDiscoIq, err := stanza.NewIQ(stanza.Attrs{Type: stanza.IQTypeGet, From: "service.localhost", To: "test@localhost", Id: "1"})
-	GetDiscoIq.Payload = &stanza.DiscoInfo{
+	if err != nil {
+		t.Fatalf("failed to create getDiscoIq: %v", err)
+	}
+	getDiscoIq.Payload = &stanza.DiscoInfo{
 		XMLName: xml.Name{
 			Space: "http://jabber.org/protocol/disco#info",
 			Local: "query",
@@ -200,7 +224,7 @@ func TestCompositeMatcher(t *testing.T) {
 	}{
 		{name: "match get version iq", input: getVersionIq, want: true},
 		{name: "ignore set version iq", input: setVersionIq, want: false},
-		{name: "ignore get discoinfo iq", input: GetDiscoIq, want: false},
+		{name: "ignore get discoinfo iq", input: getDiscoIq, want: false},
 		{name: "ignore message", input: message, want: false},
 	}
 
@@ -238,7 +262,10 @@ func TestCatchallMatcher(t *testing.T) {
 	}
 
 	conn = NewSenderMock()
-	iqVersion := stanza.NewIQ(stanza.Attrs{Type: stanza.IQTypeGet, From: "service.localhost", To: "test@localhost", Id: "1"})
+	iqVersion, err := stanza.NewIQ(stanza.Attrs{Type: stanza.IQTypeGet, From: "service.localhost", To: "test@localhost", Id: "1"})
+	if err != nil {
+		t.Fatalf("failed to create iqVersion: %v", err)
+	}
 	iqVersion.Payload = &stanza.DiscoInfo{
 		XMLName: xml.Name{
 			Space: "jabber:iq:version",
@@ -274,7 +301,7 @@ func (s SenderMock) Send(packet stanza.Packet) error {
 	return nil
 }
 
-func (s SenderMock) SendIQ(ctx context.Context, iq stanza.IQ) (chan stanza.IQ, error) {
+func (s SenderMock) SendIQ(ctx context.Context, iq *stanza.IQ) (chan stanza.IQ, error) {
 	out, err := xml.Marshal(iq)
 	if err != nil {
 		return nil, err

session.go

@@ -97,7 +97,7 @@ func (s *Session) startTlsIfSupported(o Config) {
 
 	if !s.transport.DoesStartTLS() {
 		if !o.Insecure {
-			s.err = errors.New("Transport does not support starttls")
+			s.err = errors.New("transport does not support starttls")
 		}
 		return
 	}

stanza/commands.go

@@ -23,7 +23,7 @@ const (
 type Command struct {
 	XMLName xml.Name `xml:"http://jabber.org/protocol/commands command"`
 
-	CommandElement CommandElement `xml:",any"`
+	CommandElement CommandElement
 
 	BadAction       *struct{} `xml:"bad-action,omitempty"`
 	BadLocale       *struct{} `xml:"bad-locale,omitempty"`
@@ -38,12 +38,19 @@ type Command struct {
 	SessionId string `xml:"sessionid,attr,omitempty"`
 	Status    string `xml:"status,attr,omitempty"`
 	Lang      string `xml:"lang,attr,omitempty"`
+
+	// Result sets
+	ResultSet *ResultSet `xml:"set,omitempty"`
 }
 
 func (c *Command) Namespace() string {
 	return c.XMLName.Space
 }
 
+func (c *Command) GetSet() *ResultSet {
+	return c.ResultSet
+}
+
 type CommandElement interface {
 	Ref() string
 }
@@ -68,6 +75,7 @@ type Note struct {
 func (n *Note) Ref() string {
 	return "note"
 }
+func (f *Form) Ref() string { return "form" }
 
 func (n *Node) Ref() string {
 	return "node"
@@ -117,6 +125,10 @@ func (c *Command) UnmarshalXML(d *xml.Decoder, start xml.StartElement) error {
 				nt := Note{}
 				d.DecodeElement(&nt, &tt)
 				c.CommandElement = &nt
+			case "x":
+				f := Form{}
+				d.DecodeElement(&f, &tt)
+				c.CommandElement = &f
 			default:
 				n := Node{}
 				e := d.DecodeElement(&n, &tt)
@@ -134,3 +146,7 @@ func (c *Command) UnmarshalXML(d *xml.Decoder, start xml.StartElement) error {
 		}
 	}
 }
+
+func init() {
+	TypeRegistry.MapExtension(PKTIQ, xml.Name{Space: "http://jabber.org/protocol/commands", Local: "command"}, Command{})
+}

stanza/commands_test.go

@@ -7,34 +7,21 @@ import (
 )
 
 func TestMarshalCommands(t *testing.T) {
-	input := "<command xmlns=\"http://jabber.org/protocol/commands\" node=\"list\" sessionid=\"list:20020923T213616Z-700\" status=\"completed\"><x " +
+	input := "<command xmlns=\"http://jabber.org/protocol/commands\" node=\"list\" " +
-		"xmlns=\"jabber:x:data\" type=\"result\"><title xmlns=\"jabber:x:data\">Available Servi" +
+		"sessionid=\"list:20020923T213616Z-700\" status=\"completed\"><x xmlns=\"jabber:x:data\" " +
-		"ces</title><reported xmlns=\"jabber:x:data\"><field xmlns=\"jabber:x:data\" label=\"S" +
+		"type=\"result\"><title>Available Services</title><reported xmlns=\"jabber:x:data\"><field var=\"service\" " +
-		"ervice\" var=\"service\"></field><field xmlns=\"jabber:x:data\" label=\"Single-User mo" +
+		"label=\"Service\"></field><field var=\"runlevel-1\" label=\"Single-User mode\">" +
-		"de\" var=\"runlevel-1\"></field><field xmlns=\"jabber:x:data\" label=\"Non-Networked M" +
+		"</field><field var=\"runlevel-2\" label=\"Non-Networked Multi-User mode\"></field><field var=\"runlevel-3\" " +
-		"ulti-User mode\" var=\"runlevel-2\"></field><field xmlns=\"jabber:x:data\" label=\"Ful" +
+		"label=\"Full Multi-User mode\"></field><field var=\"runlevel-5\" label=\"X-Window mode\"></field></reported>" +
-		"l Multi-User mode\" var=\"runlevel-3\"></field><field xmlns=\"jabber:x:data\" label=\"" +
+		"<item xmlns=\"jabber:x:data\"><field var=\"service\"><value>httpd</value></field><field var=\"runlevel-1\">" +
-		"X-Window mode\" var=\"runlevel-5\"></field></reported><item xmlns=\"jabber:x:data\"><" +
+		"<value>off</value></field><field var=\"runlevel-2\"><value>off</value></field><field var=\"runlevel-3\">" +
-		"field xmlns=\"jabber:x:data\" var=\"service\"><value xmlns=\"jabber:x:data\">httpd</va" +
+		"<value>on</value></field><field var=\"runlevel-5\"><value>on</value></field></item>" +
-		"lue></field><field xmlns=\"jabber:x:data\" var=\"runlevel-1\"><value xmlns=\"jabber:x" +
+		"<item xmlns=\"jabber:x:data\"><field var=\"service\"><value>postgresql</value></field>" +
-		":data\">off</value></field><field xmlns=\"jabber:x:data\" var=\"runlevel-2\"><value x" +
+		"<field var=\"runlevel-1\"><value>off</value></field><field var=\"runlevel-2\"><value>off</value></field>" +
-		"mlns=\"jabber:x:data\">off</value></field><field xmlns=\"jabber:x:data\" var=\"runlev" +
+		"<field var=\"runlevel-3\"><value>on</value></field><field var=\"runlevel-5\"><value>on</value></field></item>" +
-		"el-3\"><value xmlns=\"jabber:x:data\">on</value></field><field xmlns=\"jabber:x:data" +
+		"<item xmlns=\"jabber:x:data\"><field var=\"service\"><value>jabberd</value></field><field var=\"runlevel-1\">" +
-		"\" var=\"runlevel-5\"><value xmlns=\"jabber:x:data\">on</value></field></item><item x" +
+		"<value>off</value></field><field var=\"runlevel-2\"><value>off</value></field><field var=\"runlevel-3\">" +
-		"mlns=\"jabber:x:data\"><field xmlns=\"jabber:x:data\" var=\"service\"><value xmlns=\"ja" +
+		"<value>on</value></field><field var=\"runlevel-5\"><value>on</value></field></item></x></command>"
-		"bber:x:data\">postgresql</value></field><field xmlns=\"jabber:x:data\" var=\"runleve" +
-		"l-1\"><value xmlns=\"jabber:x:data\">off</value></field><field xmlns=\"jabber:x:data" +
-		"\" var=\"runlevel-2\"><value xmlns=\"jabber:x:data\">off</value></field><field xmlns=" +
-		"\"jabber:x:data\" var=\"runlevel-3\"><value xmlns=\"jabber:x:data\">on</value></field>" +
-		"<field xmlns=\"jabber:x:data\" var=\"runlevel-5\"><value xmlns=\"jabber:x:data\">on</v" +
-		"alue></field></item><item xmlns=\"jabber:x:data\"><field xmlns=\"jabber:x:data\" var" +
-		"=\"service\"><value xmlns=\"jabber:x:data\">jabberd</value></field><field xmlns=\"jab" +
-		"ber:x:data\" var=\"runlevel-1\"><value xmlns=\"jabber:x:data\">off</value></field><fi" +
-		"eld xmlns=\"jabber:x:data\" var=\"runlevel-2\"><value xmlns=\"jabber:x:data\">off</val" +
-		"ue></field><field xmlns=\"jabber:x:data\" var=\"runlevel-3\"><value xmlns=\"jabber:x:" +
-		"data\">on</value></field><field xmlns=\"jabber:x:data\" var=\"runlevel-5\"><value xml" +
-		"ns=\"jabber:x:data\">on</value></field></item></x></command>"
-
 	var c stanza.Command
 	err := xml.Unmarshal([]byte(input), &c)
 

stanza/component.go

@@ -42,11 +42,16 @@ type Delegation struct {
 	XMLName   xml.Name   `xml:"urn:xmpp:delegation:1 delegation"`
 	Forwarded *Forwarded // This is used in iq to wrap delegated iqs
 	Delegated *Delegated // This is used in a message to confirm delegated namespace
+	// Result sets
+	ResultSet *ResultSet `xml:"set,omitempty"`
 }
 
 func (d *Delegation) Namespace() string {
 	return d.XMLName.Space
 }
+func (d *Delegation) GetSet() *ResultSet {
+	return d.ResultSet
+}
 
 // Forwarded is used to wrapped forwarded stanzas.
 // TODO: Move it in another file, as it is not limited to components.
@@ -86,6 +91,6 @@ type Delegated struct {
 }
 
 func init() {
-	TypeRegistry.MapExtension(PKTMessage, xml.Name{"urn:xmpp:delegation:1", "delegation"}, Delegation{})
+	TypeRegistry.MapExtension(PKTMessage, xml.Name{Space: "urn:xmpp:delegation:1", Local: "delegation"}, Delegation{})
-	TypeRegistry.MapExtension(PKTIQ, xml.Name{"urn:xmpp:delegation:1", "delegation"}, Delegation{})
+	TypeRegistry.MapExtension(PKTIQ, xml.Name{Space: "urn:xmpp:delegation:1", Local: "delegation"}, Delegation{})
 }

stanza/component_test.go

@@ -61,7 +61,7 @@ func TestParsingDelegationIQ(t *testing.T) {
 	if iq.Payload != nil {
 		if delegation, ok := iq.Payload.(*Delegation); ok {
 			packet := delegation.Forwarded.Stanza
-			forwardedIQ, ok := packet.(IQ)
+			forwardedIQ, ok := packet.(*IQ)
 			if !ok {
 				t.Errorf("Could not extract packet IQ")
 				return

stanza/form.go

@@ -14,17 +14,18 @@ const (
 // See XEP-0004 and XEP-0068
 // Pointer semantics
 type Form struct {
-	XMLName      xml.Name  `xml:"jabber:x:data x"`
+	XMLName      xml.Name   `xml:"jabber:x:data x"`
-	Instructions []string  `xml:"instructions"`
+	Instructions []string   `xml:"instructions"`
-	Title        string    `xml:"title,omitempty"`
+	Title        string     `xml:"title,omitempty"`
-	Fields       []*Field  `xml:"field,omitempty"`
+	Fields       []*Field   `xml:"field,omitempty"`
-	Reported     *FormItem `xml:"reported"`
+	Reported     *FormItem  `xml:"reported"`
-	Items        []FormItem
+	Items        []FormItem `xml:"item,omitempty"`
-	Type         string `xml:"type,attr"`
+	Type         string     `xml:"type,attr"`
 }
 
 type FormItem struct {
-	Fields []Field
+	XMLName xml.Name
+	Fields  []Field `xml:"field,omitempty"`
 }
 
 type Field struct {

stanza/form_test.go

@@ -51,7 +51,10 @@ const (
 )
 
 func TestMarshalFormSubmit(t *testing.T) {
-	formIQ := NewIQ(Attrs{From: clientJid, To: serviceJid, Id: iqId, Type: IQTypeSet})
+	formIQ, err := NewIQ(Attrs{From: clientJid, To: serviceJid, Id: iqId, Type: IQTypeSet})
+	if err != nil {
+		t.Fatalf("failed to create formIQ: %v", err)
+	}
 	formIQ.Payload = &PubSubOwner{
 		OwnerUseCase: &ConfigureOwner{
 			Node: serviceNode,

stanza/iot.go

@@ -7,12 +7,18 @@ import (
 type ControlSet struct {
 	XMLName xml.Name       `xml:"urn:xmpp:iot:control set"`
 	Fields  []ControlField `xml:",any"`
+	// Result sets
+	ResultSet *ResultSet `xml:"set,omitempty"`
 }
 
 func (c *ControlSet) Namespace() string {
 	return c.XMLName.Space
 }
 
+func (c *ControlSet) GetSet() *ResultSet {
+	return c.ResultSet
+}
+
 type ControlGetForm struct {
 	XMLName xml.Name `xml:"urn:xmpp:iot:control getForm"`
 }
@@ -30,10 +36,13 @@ type ControlSetResponse struct {
 func (c *ControlSetResponse) Namespace() string {
 	return c.XMLName.Space
 }
+func (c *ControlSetResponse) GetSet() *ResultSet {
+	return nil
+}
 
 // ============================================================================
 // Registry init
 
 func init() {
-	TypeRegistry.MapExtension(PKTIQ, xml.Name{"urn:xmpp:iot:control", "set"}, ControlSet{})
+	TypeRegistry.MapExtension(PKTIQ, xml.Name{Space: "urn:xmpp:iot:control", Local: "set"}, ControlSet{})
 }

stanza/iq.go

@@ -2,6 +2,7 @@ package stanza
 
 import (
 	"encoding/xml"
+	"errors"
 	"strings"
 
 	"github.com/google/uuid"
@@ -31,22 +32,28 @@ type IQ struct { // Info/Query
 
 type IQPayload interface {
 	Namespace() string
+	GetSet() *ResultSet
 }
 
-func NewIQ(a Attrs) IQ {
+func NewIQ(a Attrs) (*IQ, error) {
-	// TODO ensure that type is set, as it is required
 	if a.Id == "" {
 		if id, err := uuid.NewRandom(); err == nil {
 			a.Id = id.String()
 		}
 	}
-	return IQ{
+
+	iq := IQ{
 		XMLName: xml.Name{Local: "iq"},
 		Attrs:   a,
 	}
+
+	if iq.Type.IsEmpty() {
+		return nil, IqTypeUnset
+	}
+	return &iq, nil
 }
 
-func (iq IQ) MakeError(xerror Err) IQ {
+func (iq *IQ) MakeError(xerror Err) *IQ {
 	from := iq.From
 	to := iq.To
 
@@ -58,18 +65,23 @@ func (iq IQ) MakeError(xerror Err) IQ {
 	return iq
 }
 
-func (IQ) Name() string {
+func (*IQ) Name() string {
 	return "iq"
 }
 
+// NoOp to implement BiDirIteratorElt
+func (*IQ) NoOp() {
+
+}
+
 type iqDecoder struct{}
 
 var iq iqDecoder
 
-func (iqDecoder) decode(p *xml.Decoder, se xml.StartElement) (IQ, error) {
+func (iqDecoder) decode(p *xml.Decoder, se xml.StartElement) (*IQ, error) {
 	var packet IQ
 	err := p.DecodeElement(&packet, &se)
-	return packet, err
+	return &packet, err
 }
 
 // UnmarshalXML implements custom parsing for IQs
@@ -134,38 +146,47 @@ func (iq *IQ) UnmarshalXML(d *xml.Decoder, start xml.StartElement) error {
 	}
 }
 
+var (
+	IqTypeUnset  = errors.New("iq type is not set but is mandatory")
+	IqIDUnset    = errors.New("iq stanza ID is not set but is mandatory")
+	IqSGetNoPl   = errors.New("iq is of type get or set but has no payload")
+	IqResNoPl    = errors.New("iq is of type result but has no payload")
+	IqErrNoErrPl = errors.New("iq is of type error but has no error payload")
+)
+
+// IsValid checks if the IQ is valid. If not, return an error with the reason as a message
 // Following RFC-3920 for IQs
-func (iq *IQ) IsValid() bool {
+func (iq *IQ) IsValid() (bool, error) {
 	// ID is required
 	if len(strings.TrimSpace(iq.Id)) == 0 {
-		return false
+		return false, IqIDUnset
 	}
 
 	// Type is required
 	if iq.Type.IsEmpty() {
-		return false
+		return false, IqTypeUnset
 	}
 
 	// Type get and set must contain one and only one child element that specifies the semantics
 	if iq.Type == IQTypeGet || iq.Type == IQTypeSet {
 		if iq.Payload == nil && iq.Any == nil {
-			return false
+			return false, IqSGetNoPl
 		}
 	}
 
 	// A result must include zero or one child element
 	if iq.Type == IQTypeResult {
 		if iq.Payload != nil && iq.Any != nil {
-			return false
+			return false, IqResNoPl
 		}
 	}
 
 	//Error type must contain an "error" child element
 	if iq.Type == IQTypeError {
 		if iq.Error == nil {
-			return false
+			return false, IqErrNoErrPl
 		}
 	}
 
-	return true
+	return true, nil
 }

stanza/iq_disco.go

@@ -16,10 +16,11 @@ const (
 // Namespaces
 
 type DiscoInfo struct {
-	XMLName  xml.Name   `xml:"http://jabber.org/protocol/disco#info query"`
+	XMLName   xml.Name   `xml:"http://jabber.org/protocol/disco#info query"`
-	Node     string     `xml:"node,attr,omitempty"`
+	Node      string     `xml:"node,attr,omitempty"`
-	Identity []Identity `xml:"identity"`
+	Identity  []Identity `xml:"identity"`
-	Features []Feature  `xml:"feature"`
+	Features  []Feature  `xml:"feature"`
+	ResultSet *ResultSet `xml:"set,omitempty"`
 }
 
 // Namespace lets DiscoInfo implement the IQPayload interface
@@ -27,6 +28,10 @@ func (d *DiscoInfo) Namespace() string {
 	return d.XMLName.Space
 }
 
+func (d *DiscoInfo) GetSet() *ResultSet {
+	return d.ResultSet
+}
+
 // ---------------
 // Builder helpers
 
@@ -102,12 +107,19 @@ type DiscoItems struct {
 	XMLName xml.Name    `xml:"http://jabber.org/protocol/disco#items query"`
 	Node    string      `xml:"node,attr,omitempty"`
 	Items   []DiscoItem `xml:"item"`
+
+	// Result sets
+	ResultSet *ResultSet `xml:"set,omitempty"`
 }
 
 func (d *DiscoItems) Namespace() string {
 	return d.XMLName.Space
 }
 
+func (d *DiscoItems) GetSet() *ResultSet {
+	return d.ResultSet
+}
+
 // ---------------
 // Builder helpers
 
@@ -146,6 +158,6 @@ type DiscoItem struct {
 // Registry init
 
 func init() {
-	TypeRegistry.MapExtension(PKTIQ, xml.Name{NSDiscoInfo, "query"}, DiscoInfo{})
+	TypeRegistry.MapExtension(PKTIQ, xml.Name{Space: NSDiscoInfo, Local: "query"}, DiscoInfo{})
-	TypeRegistry.MapExtension(PKTIQ, xml.Name{NSDiscoItems, "query"}, DiscoItems{})
+	TypeRegistry.MapExtension(PKTIQ, xml.Name{Space: NSDiscoItems, Local: "query"}, DiscoItems{})
 }

stanza/iq_disco_test.go

@@ -9,7 +9,10 @@ import (
 
 // Test DiscoInfo Builder with several features
 func TestDiscoInfo_Builder(t *testing.T) {
-	iq := stanza.NewIQ(stanza.Attrs{Type: "get", To: "service.localhost", Id: "disco-get-1"})
+	iq, err := stanza.NewIQ(stanza.Attrs{Type: "get", To: "service.localhost", Id: "disco-get-1"})
+	if err != nil {
+		t.Fatalf("failed to create IQ: %v", err)
+	}
 	disco := iq.DiscoInfo()
 	disco.AddIdentity("Test Component", "gateway", "service")
 	disco.AddFeatures(stanza.NSDiscoInfo, stanza.NSDiscoItems, "jabber:iq:version", "urn:xmpp:delegation:1")
@@ -50,8 +53,11 @@ func TestDiscoInfo_Builder(t *testing.T) {
 // Implements XEP-0030 example 17
 // https://xmpp.org/extensions/xep-0030.html#example-17
 func TestDiscoItems_Builder(t *testing.T) {
-	iq := stanza.NewIQ(stanza.Attrs{Type: stanza.IQTypeResult, From: "catalog.shakespeare.lit",
+	iq, err := stanza.NewIQ(stanza.Attrs{Type: stanza.IQTypeResult, From: "catalog.shakespeare.lit",
 		To: "romeo@montague.net/orchard", Id: "items-2"})
+	if err != nil {
+		t.Fatalf("failed to create IQ: %v", err)
+	}
 	iq.DiscoItems().
 		AddItem("catalog.shakespeare.lit", "books", "Books by and about Shakespeare").
 		AddItem("catalog.shakespeare.lit", "clothing", "Wear your literary taste with pride").

stanza/iq_roster.go

@@ -35,12 +35,17 @@ const (
 // Roster struct represents Roster IQs
 type Roster struct {
 	XMLName xml.Name `xml:"jabber:iq:roster query"`
+	// Result sets
+	ResultSet *ResultSet `xml:"set,omitempty"`
 }
 
 // Namespace defines the namespace for the RosterIQ
 func (r *Roster) Namespace() string {
 	return r.XMLName.Space
 }
+func (r *Roster) GetSet() *ResultSet {
+	return r.ResultSet
+}
 
 // ---------------
 // Builder helpers
@@ -64,6 +69,8 @@ func (iq *IQ) RosterIQ() *Roster {
 type RosterItems struct {
 	XMLName xml.Name     `xml:"jabber:iq:roster query"`
 	Items   []RosterItem `xml:"item"`
+	// Result sets
+	ResultSet *ResultSet `xml:"set,omitempty"`
 }
 
 // Namespace lets RosterItems implement the IQPayload interface
@@ -71,6 +78,10 @@ func (r *RosterItems) Namespace() string {
 	return r.XMLName.Space
 }
 
+func (r *RosterItems) GetSet() *ResultSet {
+	return r.ResultSet
+}
+
 // RosterItem represents an item in the roster iq
 type RosterItem struct {
 	XMLName      xml.Name `xml:"jabber:iq:roster item"`

stanza/iq_roster_test.go

@@ -7,7 +7,10 @@ import (
 )
 
 func TestRosterBuilder(t *testing.T) {
-	iq := NewIQ(Attrs{Type: IQTypeResult, From: "romeo@montague.net/orchard"})
+	iq, err := NewIQ(Attrs{Type: IQTypeResult, From: "romeo@montague.net/orchard"})
+	if err != nil {
+		t.Fatalf("failed to create IQ: %v", err)
+	}
 	var noGroup []string
 
 	iq.RosterItems().AddItem("xl8ceawrfu8zdneomw1h6h28d@crypho.com",
@@ -91,7 +94,7 @@ func TestRosterBuilder(t *testing.T) {
 	}
 }
 
-func checkMarshalling(t *testing.T, iq IQ) (*IQ, error) {
+func checkMarshalling(t *testing.T, iq *IQ) (*IQ, error) {
 	// Marshall
 	data, err := xml.Marshal(iq)
 	if err != nil {

stanza/iq_test.go

@@ -36,24 +36,36 @@ func TestUnmarshalIqs(t *testing.T) {
 
 func TestGenerateIqId(t *testing.T) {
 	t.Parallel()
-	iq := stanza.NewIQ(stanza.Attrs{Id: "1"})
+	iq, err := stanza.NewIQ(stanza.Attrs{Id: "1", Type: "dummy type"})
+	if err != nil {
+		t.Fatalf("failed to create IQ: %v", err)
+	}
 	if iq.Id != "1" {
 		t.Errorf("NewIQ replaced id with %s", iq.Id)
 	}
 
-	iq = stanza.NewIQ(stanza.Attrs{})
+	iq, err = stanza.NewIQ(stanza.Attrs{Type: "dummy type"})
+	if err != nil {
+		t.Fatalf("failed to create IQ: %v", err)
+	}
 	if iq.Id == "" {
 		t.Error("NewIQ did not generate an Id")
 	}
 
-	otherIq := stanza.NewIQ(stanza.Attrs{})
+	otherIq, err := stanza.NewIQ(stanza.Attrs{Type: "dummy type"})
+	if err != nil {
+		t.Fatalf("failed to create IQ: %v", err)
+	}
 	if iq.Id == otherIq.Id {
 		t.Errorf("NewIQ generated two identical ids: %s", iq.Id)
 	}
 }
 
 func TestGenerateIq(t *testing.T) {
-	iq := stanza.NewIQ(stanza.Attrs{Type: stanza.IQTypeResult, From: "admin@localhost", To: "test@localhost", Id: "1"})
+	iq, err := stanza.NewIQ(stanza.Attrs{Type: stanza.IQTypeResult, From: "admin@localhost", To: "test@localhost", Id: "1"})
+	if err != nil {
+		t.Fatalf("failed to create IQ: %v", err)
+	}
 	payload := stanza.DiscoInfo{
 		Identity: []stanza.Identity{
 			{Name: "Test Gateway",
@@ -111,7 +123,10 @@ func TestErrorTag(t *testing.T) {
 }
 
 func TestDiscoItems(t *testing.T) {
-	iq := stanza.NewIQ(stanza.Attrs{Type: stanza.IQTypeGet, From: "romeo@montague.net/orchard", To: "catalog.shakespeare.lit", Id: "items3"})
+	iq, err := stanza.NewIQ(stanza.Attrs{Type: stanza.IQTypeGet, From: "romeo@montague.net/orchard", To: "catalog.shakespeare.lit", Id: "items3"})
+	if err != nil {
+		t.Fatalf("failed to create IQ: %v", err)
+	}
 	payload := stanza.DiscoItems{
 		Node: "music",
 	}
@@ -215,8 +230,9 @@ func TestIsValid(t *testing.T) {
 				t.Errorf("Unmarshal error: %#v (%s)", err, tcase.iq)
 				return
 			}
-			if !parsedIQ.IsValid() && !tcase.shouldErr {
+			isValid, err := parsedIQ.IsValid()
-				t.Errorf("failed iq validation for : %s", tcase.iq)
+			if !isValid && !tcase.shouldErr {
+				t.Errorf("failed validation for iq because: %s\nin test case : %s", err, tcase.iq)
 			}
 		})
 	}

stanza/iq_version.go

@@ -11,12 +11,18 @@ type Version struct {
 	Name    string   `xml:"name,omitempty"`
 	Version string   `xml:"version,omitempty"`
 	OS      string   `xml:"os,omitempty"`
+	// Result sets
+	ResultSet *ResultSet `xml:"set,omitempty"`
 }
 
 func (v *Version) Namespace() string {
 	return v.XMLName.Space
 }
 
+func (v *Version) GetSet() *ResultSet {
+	return v.ResultSet
+}
+
 // ---------------
 // Builder helpers
 
@@ -41,5 +47,5 @@ func (v *Version) SetInfo(name, version, os string) *Version {
 // Registry init
 
 func init() {
-	TypeRegistry.MapExtension(PKTIQ, xml.Name{"jabber:iq:version", "query"}, Version{})
+	TypeRegistry.MapExtension(PKTIQ, xml.Name{Space: "jabber:iq:version", Local: "query"}, Version{})
 }

stanza/iq_version_test.go

@@ -12,8 +12,11 @@ func TestVersion_Builder(t *testing.T) {
 	name := "Exodus"
 	version := "0.7.0.4"
 	os := "Windows-XP 5.01.2600"
-	iq := stanza.NewIQ(stanza.Attrs{Type: "result", From: "romeo@montague.net/orchard",
+	iq, err := stanza.NewIQ(stanza.Attrs{Type: "result", From: "romeo@montague.net/orchard",
 		To: "juliet@capulet.com/balcony", Id: "version_1"})
+	if err != nil {
+		t.Fatalf("failed to create IQ: %v", err)
+	}
 	iq.Version().SetInfo(name, version, os)
 
 	parsedIQ, err := checkMarshalling(t, iq)

stanza/msg_chat_markers.go

@@ -35,8 +35,8 @@ type MarkAcknowledged struct {
 }
 
 func init() {
-	TypeRegistry.MapExtension(PKTMessage, xml.Name{NSMsgChatMarkers, "markable"}, Markable{})
+	TypeRegistry.MapExtension(PKTMessage, xml.Name{Space: NSMsgChatMarkers, Local: "markable"}, Markable{})
-	TypeRegistry.MapExtension(PKTMessage, xml.Name{NSMsgChatMarkers, "received"}, MarkReceived{})
+	TypeRegistry.MapExtension(PKTMessage, xml.Name{Space: NSMsgChatMarkers, Local: "received"}, MarkReceived{})
-	TypeRegistry.MapExtension(PKTMessage, xml.Name{NSMsgChatMarkers, "displayed"}, MarkDisplayed{})
+	TypeRegistry.MapExtension(PKTMessage, xml.Name{Space: NSMsgChatMarkers, Local: "displayed"}, MarkDisplayed{})
-	TypeRegistry.MapExtension(PKTMessage, xml.Name{NSMsgChatMarkers, "acknowledged"}, MarkAcknowledged{})
+	TypeRegistry.MapExtension(PKTMessage, xml.Name{Space: NSMsgChatMarkers, Local: "acknowledged"}, MarkAcknowledged{})
 }

stanza/msg_chat_state.go

@@ -37,9 +37,9 @@ type StatePaused struct {
 }
 
 func init() {
-	TypeRegistry.MapExtension(PKTMessage, xml.Name{NSMsgChatStateNotifications, "active"}, StateActive{})
+	TypeRegistry.MapExtension(PKTMessage, xml.Name{Space: NSMsgChatStateNotifications, Local: "active"}, StateActive{})
-	TypeRegistry.MapExtension(PKTMessage, xml.Name{NSMsgChatStateNotifications, "composing"}, StateComposing{})
+	TypeRegistry.MapExtension(PKTMessage, xml.Name{Space: NSMsgChatStateNotifications, Local: "composing"}, StateComposing{})
-	TypeRegistry.MapExtension(PKTMessage, xml.Name{NSMsgChatStateNotifications, "gone"}, StateGone{})
+	TypeRegistry.MapExtension(PKTMessage, xml.Name{Space: NSMsgChatStateNotifications, Local: "gone"}, StateGone{})
-	TypeRegistry.MapExtension(PKTMessage, xml.Name{NSMsgChatStateNotifications, "inactive"}, StateInactive{})
+	TypeRegistry.MapExtension(PKTMessage, xml.Name{Space: NSMsgChatStateNotifications, Local: "inactive"}, StateInactive{})
-	TypeRegistry.MapExtension(PKTMessage, xml.Name{NSMsgChatStateNotifications, "paused"}, StatePaused{})
+	TypeRegistry.MapExtension(PKTMessage, xml.Name{Space: NSMsgChatStateNotifications, Local: "paused"}, StatePaused{})
 }

stanza/msg_html.go

@@ -18,5 +18,5 @@ type HTMLBody struct {
 }
 
 func init() {
-	TypeRegistry.MapExtension(PKTMessage, xml.Name{"http://jabber.org/protocol/xhtml-im", "html"}, HTML{})
+	TypeRegistry.MapExtension(PKTMessage, xml.Name{Space: "http://jabber.org/protocol/xhtml-im", Local: "html"}, HTML{})
 }

stanza/msg_oob.go

@@ -17,5 +17,5 @@ type OOB struct {
 }
 
 func init() {
-	TypeRegistry.MapExtension(PKTMessage, xml.Name{"jabber:x:oob", "x"}, OOB{})
+	TypeRegistry.MapExtension(PKTMessage, xml.Name{Space: "jabber:x:oob", Local: "x"}, OOB{})
 }

stanza/msg_pubsub_event.go

@@ -210,5 +210,4 @@ func (pse *PubSubEvent) UnmarshalXML(d *xml.Decoder, start xml.StartElement) err
 		}
 
 	}
-	return nil
 }

stanza/msg_receipts.go

@@ -24,6 +24,6 @@ type ReceiptReceived struct {
 }
 
 func init() {
-	TypeRegistry.MapExtension(PKTMessage, xml.Name{NSMsgReceipts, "request"}, ReceiptRequest{})
+	TypeRegistry.MapExtension(PKTMessage, xml.Name{Space: NSMsgReceipts, Local: "request"}, ReceiptRequest{})
-	TypeRegistry.MapExtension(PKTMessage, xml.Name{NSMsgReceipts, "received"}, ReceiptReceived{})
+	TypeRegistry.MapExtension(PKTMessage, xml.Name{Space: NSMsgReceipts, Local: "received"}, ReceiptReceived{})
 }

stanza/node_test.go

@@ -8,7 +8,10 @@ import (
 func TestNode_Marshal(t *testing.T) {
 	jsonData := []byte("{\"key\":\"value\"}")
 
-	iqResp := NewIQ(Attrs{Type: "result", From: "admin@localhost", To: "test@localhost", Id: "1"})
+	iqResp, err := NewIQ(Attrs{Type: "result", From: "admin@localhost", To: "test@localhost", Id: "1"})
+	if err != nil {
+		t.Fatalf("failed to create IQ: %v", err)
+	}
 	iqResp.Any = &Node{
 		XMLName: xml.Name{Space: "myNS", Local: "space"},
 		Content: string(jsonData),

stanza/pres_muc.go

@@ -144,5 +144,5 @@ func (h History) MarshalXML(e *xml.Encoder, start xml.StartElement) (err error)
 }
 
 func init() {
-	TypeRegistry.MapExtension(PKTPresence, xml.Name{"http://jabber.org/protocol/muc", "x"}, MucPresence{})
+	TypeRegistry.MapExtension(PKTPresence, xml.Name{Space: "http://jabber.org/protocol/muc", Local: "x"}, MucPresence{})
 }

stanza/pubsub.go

@@ -29,12 +29,19 @@ type PubSubGeneric struct {
 	// To use in responses to sub/unsub for instance
 	// Subscription options
 	Unsubscribe *SubInfo `xml:"unsubscribe,omitempty"`
+
+	// Result sets
+	ResultSet *ResultSet `xml:"set,omitempty"`
 }
 
 func (p *PubSubGeneric) Namespace() string {
 	return p.XMLName.Space
 }
 
+func (p *PubSubGeneric) GetSet() *ResultSet {
+	return p.ResultSet
+}
+
 type Affiliations struct {
 	List []Affiliation `xml:"affiliation"`
 	Node string        `xml:"node,attr,omitempty"`
@@ -156,12 +163,15 @@ type PubSubOption struct {
 // It's a Set type IQ.
 // Information about the subscription and the requester are separated. subInfo contains information about the subscription.
 // 6.1 Subscribe to a Node
-func NewSubRq(serviceId string, subInfo SubInfo) (IQ, error) {
+func NewSubRq(serviceId string, subInfo SubInfo) (*IQ, error) {
 	if e := subInfo.validate(); e != nil {
-		return IQ{}, e
+		return nil, e
 	}
 
-	iq := NewIQ(Attrs{Type: IQTypeSet, To: serviceId})
+	iq, err := NewIQ(Attrs{Type: IQTypeSet, To: serviceId})
+	if err != nil {
+		return nil, err
+	}
 	iq.Payload = &PubSubGeneric{
 		Subscribe: &subInfo,
 	}
@@ -172,12 +182,15 @@ func NewSubRq(serviceId string, subInfo SubInfo) (IQ, error) {
 // It's a Set type IQ
 // Information about the subscription and the requester are separated. subInfo contains information about the subscription.
 // 6.2 Unsubscribe from a Node
-func NewUnsubRq(serviceId string, subInfo SubInfo) (IQ, error) {
+func NewUnsubRq(serviceId string, subInfo SubInfo) (*IQ, error) {
 	if e := subInfo.validate(); e != nil {
-		return IQ{}, e
+		return nil, e
 	}
 
-	iq := NewIQ(Attrs{Type: IQTypeSet, To: serviceId})
+	iq, err := NewIQ(Attrs{Type: IQTypeSet, To: serviceId})
+	if err != nil {
+		return nil, err
+	}
 	iq.Payload = &PubSubGeneric{
 		Unsubscribe: &subInfo,
 	}
@@ -188,12 +201,15 @@ func NewUnsubRq(serviceId string, subInfo SubInfo) (IQ, error) {
 // It's a Get type IQ
 // Information about the subscription and the requester are separated. subInfo contains information about the subscription.
 // 6.3 Configure Subscription Options
-func NewSubOptsRq(serviceId string, subInfo SubInfo) (IQ, error) {
+func NewSubOptsRq(serviceId string, subInfo SubInfo) (*IQ, error) {
 	if e := subInfo.validate(); e != nil {
-		return IQ{}, e
+		return nil, e
 	}
 
-	iq := NewIQ(Attrs{Type: IQTypeGet, To: serviceId})
+	iq, err := NewIQ(Attrs{Type: IQTypeGet, To: serviceId})
+	if err != nil {
+		return nil, err
+	}
 	iq.Payload = &PubSubGeneric{
 		SubOptions: &SubOptions{
 			SubInfo: subInfo,
@@ -205,15 +221,18 @@ func NewSubOptsRq(serviceId string, subInfo SubInfo) (IQ, error) {
 // NewFormSubmission builds a form submission pubsub IQ
 // Information about the subscription and the requester are separated. subInfo contains information about the subscription.
 // 6.3.5 Form Submission
-func NewFormSubmission(serviceId string, subInfo SubInfo, form *Form) (IQ, error) {
+func NewFormSubmission(serviceId string, subInfo SubInfo, form *Form) (*IQ, error) {
 	if e := subInfo.validate(); e != nil {
-		return IQ{}, e
+		return nil, e
 	}
 	if form.Type != FormTypeSubmit {
-		return IQ{}, errors.New("form type was expected to be submit but was : " + form.Type)
+		return nil, errors.New("form type was expected to be submit but was : " + form.Type)
 	}
 
-	iq := NewIQ(Attrs{Type: IQTypeSet, To: serviceId})
+	iq, err := NewIQ(Attrs{Type: IQTypeSet, To: serviceId})
+	if err != nil {
+		return nil, err
+	}
 	iq.Payload = &PubSubGeneric{
 		SubOptions: &SubOptions{
 			SubInfo: subInfo,
@@ -229,14 +248,17 @@ func NewFormSubmission(serviceId string, subInfo SubInfo, form *Form) (IQ, error
 // since the value of the <subscribe/> element's 'node' attribute specifies the desired NodeID and
 // the value of the <subscribe/> element's 'jid' attribute specifies the subscriber's JID
 // 6.3.7 Subscribe and Configure
-func NewSubAndConfig(serviceId string, subInfo SubInfo, form *Form) (IQ, error) {
+func NewSubAndConfig(serviceId string, subInfo SubInfo, form *Form) (*IQ, error) {
 	if e := subInfo.validate(); e != nil {
-		return IQ{}, e
+		return nil, e
 	}
 	if form.Type != FormTypeSubmit {
-		return IQ{}, errors.New("form type was expected to be submit but was : " + form.Type)
+		return nil, errors.New("form type was expected to be submit but was : " + form.Type)
+	}
+	iq, err := NewIQ(Attrs{Type: IQTypeSet, To: serviceId})
+	if err != nil {
+		return nil, err
 	}
-	iq := NewIQ(Attrs{Type: IQTypeSet, To: serviceId})
 	iq.Payload = &PubSubGeneric{
 		Subscribe: &subInfo,
 		SubOptions: &SubOptions{
@@ -251,8 +273,11 @@ func NewSubAndConfig(serviceId string, subInfo SubInfo, form *Form) (IQ, error)
 // NewItemsRequest creates a request to query existing items from a node.
 // Specify a "maxItems" value to request only the last maxItems items. If 0, requests all items.
 // 6.5.2 Requesting All List AND 6.5.7 Requesting the Most Recent List
-func NewItemsRequest(serviceId string, node string, maxItems int) (IQ, error) {
+func NewItemsRequest(serviceId string, node string, maxItems int) (*IQ, error) {
-	iq := NewIQ(Attrs{Type: IQTypeGet, To: serviceId})
+	iq, err := NewIQ(Attrs{Type: IQTypeGet, To: serviceId})
+	if err != nil {
+		return nil, err
+	}
 	iq.Payload = &PubSubGeneric{
 		Items: &Items{Node: node},
 	}
@@ -266,8 +291,11 @@ func NewItemsRequest(serviceId string, node string, maxItems int) (IQ, error) {
 
 // NewItemsRequest creates a request to get a specific item from a node.
 // 6.5.8 Requesting a Particular Item
-func NewSpecificItemRequest(serviceId, node, itemId string) (IQ, error) {
+func NewSpecificItemRequest(serviceId, node, itemId string) (*IQ, error) {
-	iq := NewIQ(Attrs{Type: IQTypeGet, To: serviceId})
+	iq, err := NewIQ(Attrs{Type: IQTypeGet, To: serviceId})
+	if err != nil {
+		return nil, err
+	}
 	iq.Payload = &PubSubGeneric{
 		Items: &Items{Node: node,
 			List: []Item{
@@ -281,13 +309,16 @@ func NewSpecificItemRequest(serviceId, node, itemId string) (IQ, error) {
 }
 
 // NewPublishItemRq creates a request to publish a single item to a node identified by its provided ID
-func NewPublishItemRq(serviceId, nodeID, pubItemID string, item Item) (IQ, error) {
+func NewPublishItemRq(serviceId, nodeID, pubItemID string, item Item) (*IQ, error) {
 	// "The <publish/> element MUST possess a 'node' attribute, specifying the NodeID of the node."
 	if strings.TrimSpace(nodeID) == "" {
-		return IQ{}, errors.New("cannot publish without a target node ID")
+		return nil, errors.New("cannot publish without a target node ID")
 	}
 
-	iq := NewIQ(Attrs{Type: IQTypeSet, To: serviceId})
+	iq, err := NewIQ(Attrs{Type: IQTypeSet, To: serviceId})
+	if err != nil {
+		return nil, err
+	}
 	iq.Payload = &PubSubGeneric{
 		Publish: &Publish{Node: nodeID, Items: []Item{item}},
 	}
@@ -306,13 +337,16 @@ func NewPublishItemRq(serviceId, nodeID, pubItemID string, item Item) (IQ, error
 // NewPublishItemOptsRq creates a request to publish items to a node identified by its provided ID, along with configuration options
 // A pubsub service MAY support the ability to specify options along with a publish request
 //(if so, it MUST advertise support for the "http://jabber.org/protocol/pubsub#publish-options" feature).
-func NewPublishItemOptsRq(serviceId, nodeID string, items []Item, options *PublishOptions) (IQ, error) {
+func NewPublishItemOptsRq(serviceId, nodeID string, items []Item, options *PublishOptions) (*IQ, error) {
 	// "The <publish/> element MUST possess a 'node' attribute, specifying the NodeID of the node."
 	if strings.TrimSpace(nodeID) == "" {
-		return IQ{}, errors.New("cannot publish without a target node ID")
+		return nil, errors.New("cannot publish without a target node ID")
 	}
 
-	iq := NewIQ(Attrs{Type: IQTypeSet, To: serviceId})
+	iq, err := NewIQ(Attrs{Type: IQTypeSet, To: serviceId})
+	if err != nil {
+		return nil, err
+	}
 	iq.Payload = &PubSubGeneric{
 		Publish:        &Publish{Node: nodeID, Items: items},
 		PublishOptions: options,
@@ -324,13 +358,16 @@ func NewPublishItemOptsRq(serviceId, nodeID string, items []Item, options *Publi
 // NewDelItemFromNode creates a request to delete and item from a node, given its id.
 // To delete an item, the publisher sends a retract request.
 // This helper function follows 7.2 Delete an Item from a Node
-func NewDelItemFromNode(serviceId, nodeID, itemId string, notify *bool) (IQ, error) {
+func NewDelItemFromNode(serviceId, nodeID, itemId string, notify *bool) (*IQ, error) {
 	// "The <retract/> element MUST possess a 'node' attribute, specifying the NodeID of the node."
 	if strings.TrimSpace(nodeID) == "" {
-		return IQ{}, errors.New("cannot delete item without a target node ID")
+		return nil, errors.New("cannot delete item without a target node ID")
 	}
 
-	iq := NewIQ(Attrs{Type: IQTypeSet, To: serviceId})
+	iq, err := NewIQ(Attrs{Type: IQTypeSet, To: serviceId})
+	if err != nil {
+		return nil, err
+	}
 	iq.Payload = &PubSubGeneric{
 		Retract: &Retract{Node: nodeID, Items: []Item{{Id: itemId}}, Notify: notify},
 	}
@@ -339,8 +376,11 @@ func NewDelItemFromNode(serviceId, nodeID, itemId string, notify *bool) (IQ, err
 
 // NewCreateAndConfigNode makes a request for node creation that has the desired node configuration.
 // See 8.1.3 Create and Configure a Node
-func NewCreateAndConfigNode(serviceId, nodeID string, confForm *Form) (IQ, error) {
+func NewCreateAndConfigNode(serviceId, nodeID string, confForm *Form) (*IQ, error) {
-	iq := NewIQ(Attrs{Type: IQTypeSet, To: serviceId})
+	iq, err := NewIQ(Attrs{Type: IQTypeSet, To: serviceId})
+	if err != nil {
+		return nil, err
+	}
 	iq.Payload = &PubSubGeneric{
 		Create:    &Create{Node: nodeID},
 		Configure: &Configure{Form: confForm},
@@ -350,8 +390,11 @@ func NewCreateAndConfigNode(serviceId, nodeID string, confForm *Form) (IQ, error
 
 // NewCreateNode builds a request to create a node on the service referenced by "serviceId"
 // See 8.1 Create a Node
-func NewCreateNode(serviceId, nodeName string) (IQ, error) {
+func NewCreateNode(serviceId, nodeName string) (*IQ, error) {
-	iq := NewIQ(Attrs{Type: IQTypeSet, To: serviceId})
+	iq, err := NewIQ(Attrs{Type: IQTypeSet, To: serviceId})
+	if err != nil {
+		return nil, err
+	}
 	iq.Payload = &PubSubGeneric{
 		Create: &Create{Node: nodeName},
 	}
@@ -361,8 +404,11 @@ func NewCreateNode(serviceId, nodeName string) (IQ, error) {
 // NewRetrieveAllSubsRequest builds a request to retrieve all subscriptions from all nodes
 // In order to make the request, the requesting entity MUST send an IQ-get whose <pubsub/>
 // child contains an empty <subscriptions/> element with no attributes.
-func NewRetrieveAllSubsRequest(serviceId string) (IQ, error) {
+func NewRetrieveAllSubsRequest(serviceId string) (*IQ, error) {
-	iq := NewIQ(Attrs{Type: IQTypeGet, To: serviceId})
+	iq, err := NewIQ(Attrs{Type: IQTypeGet, To: serviceId})
+	if err != nil {
+		return nil, err
+	}
 	iq.Payload = &PubSubGeneric{
 		Subscriptions: &Subscriptions{},
 	}
@@ -371,8 +417,11 @@ func NewRetrieveAllSubsRequest(serviceId string) (IQ, error) {
 
 // NewRetrieveAllAffilsRequest builds a request to retrieve all affiliations from all nodes
 // In order to make the request of the service, the requesting entity includes an empty <affiliations/> element with no attributes.
-func NewRetrieveAllAffilsRequest(serviceId string) (IQ, error) {
+func NewRetrieveAllAffilsRequest(serviceId string) (*IQ, error) {
-	iq := NewIQ(Attrs{Type: IQTypeGet, To: serviceId})
+	iq, err := NewIQ(Attrs{Type: IQTypeGet, To: serviceId})
+	if err != nil {
+		return nil, err
+	}
 	iq.Payload = &PubSubGeneric{
 		Affiliations: &Affiliations{},
 	}

stanza/pubsub_owner.go

@@ -9,12 +9,18 @@ import (
 type PubSubOwner struct {
 	XMLName      xml.Name `xml:"http://jabber.org/protocol/pubsub#owner pubsub"`
 	OwnerUseCase OwnerUseCase
+	// Result sets
+	ResultSet *ResultSet `xml:"set,omitempty"`
 }
 
 func (pso *PubSubOwner) Namespace() string {
 	return pso.XMLName.Space
 }
 
+func (pso *PubSubOwner) GetSet() *ResultSet {
+	return pso.ResultSet
+}
+
 type OwnerUseCase interface {
 	UseCase() string
 }
@@ -112,8 +118,11 @@ const (
 // NewConfigureNode creates a request to configure a node on the given service.
 // A form will be returned by the service, to which the user must respond using for instance the NewFormSubmission function.
 // See 8.2 Configure a Node
-func NewConfigureNode(serviceId, nodeName string) (IQ, error) {
+func NewConfigureNode(serviceId, nodeName string) (*IQ, error) {
-	iq := NewIQ(Attrs{Type: IQTypeGet, To: serviceId})
+	iq, err := NewIQ(Attrs{Type: IQTypeGet, To: serviceId})
+	if err != nil {
+		return nil, err
+	}
 	iq.Payload = &PubSubOwner{
 		OwnerUseCase: &ConfigureOwner{Node: nodeName},
 	}
@@ -122,11 +131,14 @@ func NewConfigureNode(serviceId, nodeName string) (IQ, error) {
 
 // NewDelNode creates a request to delete node "nodeID" from the "serviceId" service
 // See 8.4 Delete a Node
-func NewDelNode(serviceId, nodeID string) (IQ, error) {
+func NewDelNode(serviceId, nodeID string) (*IQ, error) {
 	if strings.TrimSpace(nodeID) == "" {
-		return IQ{}, errors.New("cannot delete a node without a target node ID")
+		return nil, errors.New("cannot delete a node without a target node ID")
+	}
+	iq, err := NewIQ(Attrs{Type: IQTypeSet, To: serviceId})
+	if err != nil {
+		return nil, err
 	}
-	iq := NewIQ(Attrs{Type: IQTypeSet, To: serviceId})
 	iq.Payload = &PubSubOwner{
 		OwnerUseCase: &DeleteOwner{Node: nodeID},
 	}
@@ -135,8 +147,11 @@ func NewDelNode(serviceId, nodeID string) (IQ, error) {
 
 // NewPurgeAllItems creates a new purge request for the "nodeId" node, at "serviceId" service
 // See 8.5 Purge All Node Items
-func NewPurgeAllItems(serviceId, nodeId string) (IQ, error) {
+func NewPurgeAllItems(serviceId, nodeId string) (*IQ, error) {
-	iq := NewIQ(Attrs{Type: IQTypeSet, To: serviceId})
+	iq, err := NewIQ(Attrs{Type: IQTypeSet, To: serviceId})
+	if err != nil {
+		return nil, err
+	}
 	iq.Payload = &PubSubOwner{
 		OwnerUseCase: &PurgeOwner{Node: nodeId},
 	}
@@ -145,8 +160,11 @@ func NewPurgeAllItems(serviceId, nodeId string) (IQ, error) {
 
 // NewRequestDefaultConfig build a request to ask the service for the default config of its nodes
 // See 8.3 Request Default Node Configuration Options
-func NewRequestDefaultConfig(serviceId string) (IQ, error) {
+func NewRequestDefaultConfig(serviceId string) (*IQ, error) {
-	iq := NewIQ(Attrs{Type: IQTypeGet, To: serviceId})
+	iq, err := NewIQ(Attrs{Type: IQTypeGet, To: serviceId})
+	if err != nil {
+		return nil, err
+	}
 	iq.Payload = &PubSubOwner{
 		OwnerUseCase: &DefaultOwner{},
 	}
@@ -177,8 +195,11 @@ func NewApproveSubRequest(serviceId, reqID string, apprForm *Form) (Message, err
 // NewGetPendingSubRequests creates a new request for all pending subscriptions to all their nodes at a service
 // This feature MUST be implemented using the Ad-Hoc Commands (XEP-0050) protocol
 // 8.7 Process Pending Subscription Requests
-func NewGetPendingSubRequests(serviceId string) (IQ, error) {
+func NewGetPendingSubRequests(serviceId string) (*IQ, error) {
-	iq := NewIQ(Attrs{Type: IQTypeSet, To: serviceId})
+	iq, err := NewIQ(Attrs{Type: IQTypeSet, To: serviceId})
+	if err != nil {
+		return nil, err
+	}
 	iq.Payload = &Command{
 		//  the command name ('node' attribute of the command element) MUST have a value of "http://jabber.org/protocol/pubsub#get-pending"
 		Node:   "http://jabber.org/protocol/pubsub#get-pending",
@@ -191,9 +212,9 @@ func NewGetPendingSubRequests(serviceId string) (IQ, error) {
 // Upon receiving the data form for managing subscription requests, the owner then MAY request pending subscription
 // approval requests for a given node.
 // See 8.7.4 Per-Node Request
-func NewApprovePendingSubRequest(serviceId, sessionId, nodeId string) (IQ, error) {
+func NewApprovePendingSubRequest(serviceId, sessionId, nodeId string) (*IQ, error) {
 	if sessionId == "" {
-		return IQ{}, errors.New("the sessionId must be maintained for the command")
+		return nil, errors.New("the sessionId must be maintained for the command")
 	}
 
 	form := &Form{
@@ -202,12 +223,15 @@ func NewApprovePendingSubRequest(serviceId, sessionId, nodeId string) (IQ, error
 	}
 	data, err := xml.Marshal(form)
 	if err != nil {
-		return IQ{}, err
+		return nil, err
 	}
 	var n Node
 	xml.Unmarshal(data, &n)
 
-	iq := NewIQ(Attrs{Type: IQTypeSet, To: serviceId})
+	iq, err := NewIQ(Attrs{Type: IQTypeSet, To: serviceId})
+	if err != nil {
+		return nil, err
+	}
 	iq.Payload = &Command{
 		//  the command name ('node' attribute of the command element) MUST have a value of "http://jabber.org/protocol/pubsub#get-pending"
 		Node:           "http://jabber.org/protocol/pubsub#get-pending",
@@ -221,16 +245,22 @@ func NewApprovePendingSubRequest(serviceId, sessionId, nodeId string) (IQ, error
 // NewSubListRequest creates a request to list subscriptions of the client, for all nodes at the service.
 // It's a Get type IQ
 // 8.8.1 Retrieve Subscriptions
-func NewSubListRqPl(serviceId, nodeID string) (IQ, error) {
+func NewSubListRqPl(serviceId, nodeID string) (*IQ, error) {
-	iq := NewIQ(Attrs{Type: IQTypeGet, To: serviceId})
+	iq, err := NewIQ(Attrs{Type: IQTypeGet, To: serviceId})
+	if err != nil {
+		return nil, err
+	}
 	iq.Payload = &PubSubOwner{
 		OwnerUseCase: &SubscriptionsOwner{Node: nodeID},
 	}
 	return iq, nil
 }
 
-func NewSubsForEntitiesRequest(serviceId, nodeID string, subs []SubscriptionOwner) (IQ, error) {
+func NewSubsForEntitiesRequest(serviceId, nodeID string, subs []SubscriptionOwner) (*IQ, error) {
-	iq := NewIQ(Attrs{Type: IQTypeSet, To: serviceId})
+	iq, err := NewIQ(Attrs{Type: IQTypeSet, To: serviceId})
+	if err != nil {
+		return nil, err
+	}
 	iq.Payload = &PubSubOwner{
 		OwnerUseCase: &SubscriptionsOwner{Node: nodeID, Subscriptions: subs},
 	}
@@ -239,8 +269,11 @@ func NewSubsForEntitiesRequest(serviceId, nodeID string, subs []SubscriptionOwne
 
 // NewModifAffiliationRequest creates a request to either modify one or more affiliations, or delete one or more affiliations
 // 8.9.2 Modify Affiliation & 8.9.2.4 Multiple Simultaneous Modifications & 8.9.3 Delete an Entity (just set the status to "none")
-func NewModifAffiliationRequest(serviceId, nodeID string, newAffils []AffiliationOwner) (IQ, error) {
+func NewModifAffiliationRequest(serviceId, nodeID string, newAffils []AffiliationOwner) (*IQ, error) {
-	iq := NewIQ(Attrs{Type: IQTypeSet, To: serviceId})
+	iq, err := NewIQ(Attrs{Type: IQTypeSet, To: serviceId})
+	if err != nil {
+		return nil, err
+	}
 	iq.Payload = &PubSubOwner{
 		OwnerUseCase: &AffiliationsOwner{
 			Node:         nodeID,
@@ -252,8 +285,11 @@ func NewModifAffiliationRequest(serviceId, nodeID string, newAffils []Affiliatio
 
 // NewAffiliationListRequest creates a request to list all affiliated entities
 // See 8.9.1 Retrieve List List
-func NewAffiliationListRequest(serviceId, nodeID string) (IQ, error) {
+func NewAffiliationListRequest(serviceId, nodeID string) (*IQ, error) {
-	iq := NewIQ(Attrs{Type: IQTypeGet, To: serviceId})
+	iq, err := NewIQ(Attrs{Type: IQTypeGet, To: serviceId})
+	if err != nil {
+		return nil, err
+	}
 	iq.Payload = &PubSubOwner{
 		OwnerUseCase: &AffiliationsOwner{
 			Node: nodeID,
@@ -265,12 +301,15 @@ func NewAffiliationListRequest(serviceId, nodeID string) (IQ, error) {
 // NewFormSubmission builds a form submission pubsub IQ, in the Owner namespace
 // This is typically used to respond to a form issued by the server when configuring a node.
 // See 8.2.4 Form Submission
-func NewFormSubmissionOwner(serviceId, nodeName string, fields []*Field) (IQ, error) {
+func NewFormSubmissionOwner(serviceId, nodeName string, fields []*Field) (*IQ, error) {
 	if serviceId == "" || nodeName == "" {
-		return IQ{}, errors.New("serviceId and nodeName must be filled for this request to be valid")
+		return nil, errors.New("serviceId and nodeName must be filled for this request to be valid")
 	}
 
-	submitConf := NewIQ(Attrs{Type: IQTypeSet, To: serviceId})
+	submitConf, err := NewIQ(Attrs{Type: IQTypeSet, To: serviceId})
+	if err != nil {
+		return nil, err
+	}
 	submitConf.Payload = &PubSubOwner{
 		OwnerUseCase: &ConfigureOwner{
 			Node: nodeName,
@@ -308,6 +347,17 @@ func (iq *IQ) GetFormFields() (map[string]*Field, error) {
 			fieldMap[elt.Var] = elt
 		}
 		return fieldMap, nil
+
+	case *Command:
+		fieldMap := make(map[string]*Field)
+		co, ok := payload.CommandElement.(*Form)
+		if !ok {
+			return nil, errors.New("this IQ does not contain a command payload with a form")
+		}
+		for _, elt := range co.Fields {
+			fieldMap[elt.Var] = elt
+		}
+		return fieldMap, nil
 	default:
 		if iq.Any != nil {
 			fieldMap := make(map[string]*Field)

stanza/pubsub_owner_test.go

@@ -16,6 +16,9 @@ func TestNewConfigureNode(t *testing.T) {
 		"</pubsub> </iq>"
 
 	subR, err := stanza.NewConfigureNode("pubsub.shakespeare.lit", "princely_musings")
+	if err != nil {
+		t.Fatalf("failed to create a configure node request: %v", err)
+	}
 	subR.Id = "config1"
 	if err != nil {
 		t.Fatalf("Could not create request : %s", err)
@@ -129,6 +132,9 @@ func TestNewRequestDefaultConfig(t *testing.T) {
 		"<pubsub xmlns=\"http://jabber.org/protocol/pubsub#owner\"> <default></default> </pubsub> </iq>"
 
 	subR, err := stanza.NewRequestDefaultConfig("pubsub.shakespeare.lit")
+	if err != nil {
+		t.Fatalf("failed to create a default config request: %v", err)
+	}
 	subR.Id = "def1"
 	if err != nil {
 		t.Fatalf("Could not create request : %s", err)
@@ -239,6 +245,9 @@ func TestNewDelNode(t *testing.T) {
 		"<delete node=\"princely_musings\"></delete> </pubsub> </iq>"
 
 	subR, err := stanza.NewDelNode("pubsub.shakespeare.lit", "princely_musings")
+	if err != nil {
+		t.Fatalf("failed to create a node delete request: %v", err)
+	}
 	subR.Id = "delete1"
 	if err != nil {
 		t.Fatalf("Could not create request : %s", err)
@@ -311,6 +320,9 @@ func TestNewPurgeAllItems(t *testing.T) {
 		"<purge node=\"princely_musings\"></purge> </pubsub> </iq>"
 
 	subR, err := stanza.NewPurgeAllItems("pubsub.shakespeare.lit", "princely_musings")
+	if err != nil {
+		t.Fatalf("failed to create a purge all items request: %v", err)
+	}
 	subR.Id = "purge1"
 	if err != nil {
 		t.Fatalf("Could not create request : %s", err)
@@ -367,6 +379,9 @@ func TestNewApproveSubRequest(t *testing.T) {
 	}
 
 	subR, err := stanza.NewApproveSubRequest("pubsub.shakespeare.lit", "approve1", apprForm)
+	if err != nil {
+		t.Fatalf("failed to create a sub approval request: %v", err)
+	}
 	subR.Id = "approve1"
 	if err != nil {
 		t.Fatalf("Could not create request : %s", err)
@@ -404,6 +419,9 @@ func TestNewGetPendingSubRequests(t *testing.T) {
 		"</command> </iq>"
 
 	subR, err := stanza.NewGetPendingSubRequests("pubsub.shakespeare.lit")
+	if err != nil {
+		t.Fatalf("failed to create a get pending subs request: %v", err)
+	}
 	subR.Id = "pending1"
 	if err != nil {
 		t.Fatalf("Could not create request : %s", err)
@@ -461,12 +479,12 @@ func TestNewGetPendingSubRequestsResp(t *testing.T) {
 
 	_, ok := respIQ.Payload.(*stanza.Command)
 	if !ok {
-		errors.New("this iq payload is not a command")
+		t.Fatal("this iq payload is not a command")
 	}
 
 	fMap, err := respIQ.GetFormFields()
 	if err != nil || len(fMap) != 2 {
-		errors.New("could not parse command form fields")
+		t.Fatal("could not parse command form fields")
 	}
 
 }
@@ -485,6 +503,9 @@ func TestNewApprovePendingSubRequest(t *testing.T) {
 	subR, err := stanza.NewApprovePendingSubRequest("pubsub.shakespeare.lit",
 		"pubsub-get-pending:20031021T150901Z-600",
 		"princely_musings")
+	if err != nil {
+		t.Fatalf("failed to create a approve pending sub request: %v", err)
+	}
 	subR.Id = "pending2"
 	if err != nil {
 		t.Fatalf("Could not create request : %s", err)
@@ -524,6 +545,9 @@ func TestNewSubListRqPl(t *testing.T) {
 		"<subscriptions node=\"princely_musings\"></subscriptions> </pubsub> </iq>"
 
 	subR, err := stanza.NewSubListRqPl("pubsub.shakespeare.lit", "princely_musings")
+	if err != nil {
+		t.Fatalf("failed to create a sub list request: %v", err)
+	}
 	subR.Id = "subman1"
 	if err != nil {
 		t.Fatalf("Could not create request : %s", err)
@@ -575,7 +599,7 @@ func TestNewSubListRqPlResp(t *testing.T) {
 
 	pubsub, ok := respIQ.Payload.(*stanza.PubSubOwner)
 	if !ok {
-		errors.New("this iq payload is not a command")
+		t.Fatal("this iq payload is not a command")
 	}
 
 	subs, ok := pubsub.OwnerUseCase.(*stanza.SubscriptionsOwner)
@@ -599,6 +623,9 @@ func TestNewAffiliationListRequest(t *testing.T) {
 		"<affiliations node=\"princely_musings\"></affiliations> </pubsub> </iq>"
 
 	subR, err := stanza.NewAffiliationListRequest("pubsub.shakespeare.lit", "princely_musings")
+	if err != nil {
+		t.Fatalf("failed to create an affiliations list request: %v", err)
+	}
 	subR.Id = "ent1"
 	if err != nil {
 		t.Fatalf("Could not create request : %s", err)
@@ -648,7 +675,7 @@ func TestNewAffiliationListRequestResp(t *testing.T) {
 
 	pubsub, ok := respIQ.Payload.(*stanza.PubSubOwner)
 	if !ok {
-		errors.New("this iq payload is not a command")
+		t.Fatal("this iq payload is not a command")
 	}
 
 	affils, ok := pubsub.OwnerUseCase.(*stanza.AffiliationsOwner)
@@ -690,6 +717,9 @@ func TestNewModifAffiliationRequest(t *testing.T) {
 	}
 
 	subR, err := stanza.NewModifAffiliationRequest("pubsub.shakespeare.lit", "princely_musings", affils)
+	if err != nil {
+		t.Fatalf("failed to create a modif affiliation request: %v", err)
+	}
 	subR.Id = "ent3"
 	if err != nil {
 		t.Fatalf("Could not create request : %s", err)
@@ -833,6 +863,10 @@ func TestNewFormSubmissionOwner(t *testing.T) {
 			{Var: "pubsub#access_model", ValuesList: []string{"roster"}},
 			{Var: "pubsub#roster_groups_allowed", ValuesList: []string{"friends", "servants", "courtiers"}},
 		})
+	if err != nil {
+		t.Fatalf("failed to create a form submission request: %v", err)
+	}
+
 	subR.Id = "config2"
 	if err != nil {
 		t.Fatalf("Could not create request : %s", err)
@@ -878,7 +912,7 @@ func getPubSubOwnerPayload(response string) (*stanza.PubSubOwner, error) {
 
 	pubsub, ok := respIQ.Payload.(*stanza.PubSubOwner)
 	if !ok {
-		errors.New("this iq payload is not a pubsub of the owner namespace")
+		return nil, errors.New("this iq payload is not a pubsub of the owner namespace")
 	}
 
 	return pubsub, nil

stanza/pubsub_test.go

@@ -40,6 +40,9 @@ func TestNewSubRequest(t *testing.T) {
 		Node: "princely_musings", Jid: "francisco@denmark.lit",
 	}
 	subR, err := stanza.NewSubRq("pubsub.shakespeare.lit", subInfo)
+	if err != nil {
+		t.Fatalf("failed to create a sub request: %v", err)
+	}
 	subR.Id = "sub1"
 	if err != nil {
 		t.Fatalf("Could not create a sub request : %s", err)
@@ -96,6 +99,9 @@ func TestNewUnSubRequest(t *testing.T) {
 		Node: "princely_musings", Jid: "francisco@denmark.lit",
 	}
 	subR, err := stanza.NewUnsubRq("pubsub.shakespeare.lit", subInfo)
+	if err != nil {
+		t.Fatalf("failed to create an unsub request: %v", err)
+	}
 	subR.Id = "unsub1"
 	if err != nil {
 		t.Fatalf("Could not create a sub request : %s", err)
@@ -157,6 +163,9 @@ func TestNewSubOptsRq(t *testing.T) {
 		Node: "princely_musings", Jid: "francisco@denmark.lit",
 	}
 	subR, err := stanza.NewSubOptsRq("pubsub.shakespeare.lit", subInfo)
+	if err != nil {
+		t.Fatalf("failed to create a sub options request: %v", err)
+	}
 	subR.Id = "options1"
 	if err != nil {
 		t.Fatalf("Could not create a sub request : %s", err)
@@ -264,6 +273,9 @@ func TestNewFormSubmission(t *testing.T) {
 	}
 
 	subR, err := stanza.NewFormSubmission("pubsub.shakespeare.lit", subInfo, submitFormExample)
+	if err != nil {
+		t.Fatalf("failed to create a form submission request: %v", err)
+	}
 	subR.Id = "options2"
 	if err != nil {
 		t.Fatalf("Could not create a sub request : %s", err)
@@ -313,6 +325,9 @@ func TestNewSubAndConfig(t *testing.T) {
 	}
 
 	subR, err := stanza.NewSubAndConfig("pubsub.shakespeare.lit", subInfo, submitFormExample)
+	if err != nil {
+		t.Fatalf("failed to create a sub and config request: %v", err)
+	}
 	subR.Id = "sub1"
 	if err != nil {
 		t.Fatalf("Could not create a sub request : %s", err)
@@ -482,6 +497,9 @@ func TestNewSpecificItemRequest(t *testing.T) {
 		"<item id=\"ae890ac52d0df67ed7cfdf51b644e901\"></item> </items> </pubsub> </iq>"
 
 	subR, err := stanza.NewSpecificItemRequest("pubsub.shakespeare.lit", "princely_musings", "ae890ac52d0df67ed7cfdf51b644e901")
+	if err != nil {
+		t.Fatalf("failed to create a specific item request: %v", err)
+	}
 	subR.Id = "items3"
 	if err != nil {
 		t.Fatalf("Could not create an items request : %s", err)
@@ -638,6 +656,9 @@ func TestNewDelItemFromNode(t *testing.T) {
 		"<item id=\"ae890ac52d0df67ed7cfdf51b644e901\"></item> </retract> </pubsub> </iq>"
 
 	subR, err := stanza.NewDelItemFromNode("pubsub.shakespeare.lit", "princely_musings", "ae890ac52d0df67ed7cfdf51b644e901", nil)
+	if err != nil {
+		t.Fatalf("failed to create a delete item from node request: %v", err)
+	}
 	subR.Id = "retract1"
 	if err != nil {
 		t.Fatalf("Could not create a del item request : %s", err)
@@ -677,6 +698,9 @@ func TestNewCreateNode(t *testing.T) {
 		"<pubsub xmlns=\"http://jabber.org/protocol/pubsub\"> <create node=\"princely_musings\"></create> </pubsub> </iq>"
 
 	subR, err := stanza.NewCreateNode("pubsub.shakespeare.lit", "princely_musings")
+	if err != nil {
+		t.Fatalf("failed to create a create node request: %v", err)
+	}
 	subR.Id = "create1"
 	if err != nil {
 		t.Fatalf("Could not create a create node request : %s", err)
@@ -748,6 +772,10 @@ func TestNewCreateAndConfigNode(t *testing.T) {
 				{Var: "pubsub#max_payload_size", ValuesList: []string{"1028"}},
 			},
 		})
+
+	if err != nil {
+		t.Fatalf("failed to create a create and config node request: %v", err)
+	}
 	subR.Id = "create1"
 	if err != nil {
 		t.Fatalf("Could not create a create node request : %s", err)
@@ -796,6 +824,9 @@ func TestNewRetrieveAllSubsRequest(t *testing.T) {
 		"<pubsub xmlns=\"http://jabber.org/protocol/pubsub\"> <subscriptions></subscriptions> </pubsub> </iq>"
 
 	subR, err := stanza.NewRetrieveAllSubsRequest("pubsub.shakespeare.lit")
+	if err != nil {
+		t.Fatalf("failed to create a get all subs request: %v", err)
+	}
 	subR.Id = "subscriptions1"
 	if err != nil {
 		t.Fatalf("Could not create a create node request : %s", err)
@@ -856,6 +887,9 @@ func TestNewRetrieveAllAffilsRequest(t *testing.T) {
 		"<pubsub xmlns=\"http://jabber.org/protocol/pubsub\"> <affiliations></affiliations> </pubsub> </iq>"
 
 	subR, err := stanza.NewRetrieveAllAffilsRequest("pubsub.shakespeare.lit")
+	if err != nil {
+		t.Fatalf("failed to create a get all affiliations request: %v", err)
+	}
 	subR.Id = "affil1"
 	if err != nil {
 		t.Fatalf("Could not create retreive all affiliations request : %s", err)
@@ -914,7 +948,7 @@ func getPubSubGenericPayload(response string) (*stanza.PubSubGeneric, error) {
 
 	pubsub, ok := respIQ.Payload.(*stanza.PubSubGeneric)
 	if !ok {
-		errors.New("this iq payload is not a pubsub")
+		return nil, errors.New("this iq payload is not a pubsub")
 	}
 
 	return pubsub, nil

stanza/results_sets.go

@@ -0,0 +1,29 @@
+package stanza
+
+import (
+	"encoding/xml"
+)
+
+// Support for XEP-0059
+// See https://xmpp.org/extensions/xep-0059
+const (
+	// Common but not only possible namespace for query blocks in a result set context
+	NSQuerySet = "jabber:iq:search"
+)
+
+type ResultSet struct {
+	XMLName xml.Name `xml:"http://jabber.org/protocol/rsm set"`
+	After   *string  `xml:"after,omitempty"`
+	Before  *string  `xml:"before,omitempty"`
+	Count   *int     `xml:"count,omitempty"`
+	First   *First   `xml:"first,omitempty"`
+	Index   *int     `xml:"index,omitempty"`
+	Last    *string  `xml:"last,omitempty"`
+	Max     *int     `xml:"max,omitempty"`
+}
+
+type First struct {
+	XMLName xml.Name `xml:"first"`
+	Content string
+	Index   *int `xml:"index,attr,omitempty"`
+}

stanza/results_sets_test.go

@@ -0,0 +1,79 @@
+package stanza_test
+
+import (
+	"encoding/xml"
+	"gosrc.io/xmpp/stanza"
+	"testing"
+)
+
+// Limiting the number of items
+func TestNewResultSetReq(t *testing.T) {
+	expectedRq := "<iq type=\"set\" id=\"limit1\" to=\"users.jabber.org\"> <query xmlns=\"jabber:iq:search\"> " +
+		"<nick>Pete</nick> <set xmlns=\"http://jabber.org/protocol/rsm\"> <max>10</max> </set> </query> </iq>"
+
+	items := []stanza.Node{
+		{
+			XMLName: xml.Name{Local: "nick"},
+			Content: "Pete",
+		},
+	}
+
+	maxVal := 10
+	rs := &stanza.ResultSet{
+		Max: &maxVal,
+	}
+
+	rq, err := stanza.NewResultSetReq("users.jabber.org", "jabber:iq:search", items, rs)
+	if err != nil {
+		t.Fatalf("failed to build the result set request : %v", err)
+	}
+	rq.Id = "limit1"
+
+	data, err := xml.Marshal(rq)
+	if err := compareMarshal(expectedRq, string(data)); err != nil {
+		t.Fatalf(err.Error())
+	}
+}
+
+func TestUnmarshalResultSeqReq(t *testing.T) {
+	//expectedRq := "<iq type=\"set\" id=\"limit1\" to=\"users.jabber.org\"> <query xmlns=\"jabber:iq:search\"> " +
+	//	"<nick>Pete</nick> <set xmlns=\"http://jabber.org/protocol/rsm\"> <max>10</max> </set> </query> </iq>"
+	//var uReq stanza.IQ
+	//err := xml.Unmarshal([]byte(expectedRq), &uReq)
+	//if err != nil {
+	//	t.Fatalf(err.Error())
+	//}
+	//items := []stanza.Node{
+	//	{
+	//		XMLName: xml.Name{Local: "nick"},
+	//		Content: "Pete",
+	//	},
+	//}
+	//
+	//maxVal := 10
+	//rs := &stanza.ResultSet{
+	//	XMLName: xml.Name{Local: "set", Space: "http://jabber.org/protocol/rsm"},
+	//	Max:     &maxVal,
+	//}
+	//
+	//rq, err := stanza.NewResultSetReq("users.jabber.org", "jabber:iq:search", items, rs)
+	//if err != nil {
+	//	t.Fatalf("failed to build the result set request : %v", err)
+	//}
+	//rq.Id = "limit1"
+	//
+	//// Namespace is unmarshalled as of parent for nodes in the payload. To DeepEqual, we need to set the namespace in
+	//// the "expectedRq"
+	//n, ok := rq.Payload.(*stanza.QuerySet)
+	//if !ok {
+	//	t.Fatalf("payload is not a query set: %v", ok)
+	//}
+	//n.Nodes[0].XMLName.Space = stanza.NSQuerySet
+	//
+	//data, err := xml.Marshal(rq)
+	//fmt.Println(string(data))
+	//if !reflect.DeepEqual(rq, uReq) {
+	//	t.Fatalf("nope")
+	//}
+
+}

stanza/sasl_auth.go

@@ -69,12 +69,18 @@ type Bind struct {
 	XMLName  xml.Name `xml:"urn:ietf:params:xml:ns:xmpp-bind bind"`
 	Resource string   `xml:"resource,omitempty"`
 	Jid      string   `xml:"jid,omitempty"`
+	// Result sets
+	ResultSet *ResultSet `xml:"set,omitempty"`
 }
 
 func (b *Bind) Namespace() string {
 	return b.XMLName.Space
 }
 
+func (b *Bind) GetSet() *ResultSet {
+	return b.ResultSet
+}
+
 // ============================================================================
 // Session (Obsolete)
 
@@ -89,12 +95,18 @@ func (b *Bind) Namespace() string {
 type StreamSession struct {
 	XMLName  xml.Name `xml:"urn:ietf:params:xml:ns:xmpp-session session"`
 	Optional bool     // If element does exist, it mean we are not required to open session
+	// Result sets
+	ResultSet *ResultSet `xml:"set,omitempty"`
 }
 
 func (s *StreamSession) Namespace() string {
 	return s.XMLName.Space
 }
 
+func (s *StreamSession) GetSet() *ResultSet {
+	return s.ResultSet
+}
+
 func (s *StreamSession) IsOptional() bool {
 	if s.XMLName.Local == "session" {
 		return s.Optional

stanza/sasl_auth_test.go

@@ -28,7 +28,10 @@ func TestSessionFeatures(t *testing.T) {
 
 // Check that the Session tag can be used in IQ decoding
 func TestSessionIQ(t *testing.T) {
-	iq := stanza.NewIQ(stanza.Attrs{Type: stanza.IQTypeSet, Id: "session"})
+	iq, err := stanza.NewIQ(stanza.Attrs{Type: stanza.IQTypeSet, Id: "session"})
+	if err != nil {
+		t.Fatalf("failed to create IQ: %v", err)
+	}
 	iq.Payload = &stanza.StreamSession{XMLName: xml.Name{Local: "session"}, Optional: true}
 
 	data, err := xml.Marshal(iq)

stanza/xmpp_test.go

@@ -16,7 +16,7 @@ var reInsideWhtsp = regexp.MustCompile(`[\s\p{Zs}]`)
 // ============================================================================
 // Marshaller / unmarshaller test
 
-func checkMarshalling(t *testing.T, iq stanza.IQ) (*stanza.IQ, error) {
+func checkMarshalling(t *testing.T, iq *stanza.IQ) (*stanza.IQ, error) {
 	// Marshall
 	data, err := xml.Marshal(iq)
 	if err != nil {

stream_manager.go

@@ -27,7 +27,7 @@ type StreamClient interface {
 	Connect() error
 	Resume(state SMState) error
 	Send(packet stanza.Packet) error
-	SendIQ(ctx context.Context, iq stanza.IQ) (chan stanza.IQ, error)
+	SendIQ(ctx context.Context, iq *stanza.IQ) (chan stanza.IQ, error)
 	SendRaw(packet string) error
 	Disconnect() error
 	SetHandler(handler EventHandler)
@@ -37,7 +37,7 @@ type StreamClient interface {
 // It is mostly use in callback to pass a limited subset of the stream client interface
 type Sender interface {
 	Send(packet stanza.Packet) error
-	SendIQ(ctx context.Context, iq stanza.IQ) (chan stanza.IQ, error)
+	SendIQ(ctx context.Context, iq *stanza.IQ) (chan stanza.IQ, error)
 	SendRaw(packet string) error
 }
 

tcp_server_mock.go

@@ -130,13 +130,16 @@ func respondToIQ(t *testing.T, sc *ServerConn) {
 		t.Fatalf("failed to receive IQ : %s", err.Error())
 	}
 
-	if !iqReq.IsValid() {
+	if vld, _ := iqReq.IsValid(); !vld {
 		mockIQError(sc.connection)
 		return
 	}
 
 	// Crafting response
-	iqResp := stanza.NewIQ(stanza.Attrs{Type: stanza.IQTypeResult, From: iqReq.To, To: iqReq.From, Id: iqReq.Id, Lang: "en"})
+	iqResp, err := stanza.NewIQ(stanza.Attrs{Type: stanza.IQTypeResult, From: iqReq.To, To: iqReq.From, Id: iqReq.Id, Lang: "en"})
+	if err != nil {
+		t.Fatalf("failed to create iqResp: %v", err)
+	}
 	disco := iqResp.DiscoInfo()
 	disco.AddFeatures("vcard-temp",
 		`http://jabber.org/protocol/address`)

transport.go

@@ -9,8 +9,8 @@ import (
 	"strings"
 )
 
-var ErrTransportProtocolNotSupported = errors.New("Transport protocol not supported")
+var ErrTransportProtocolNotSupported = errors.New("transport protocol not supported")
-var ErrTLSNotSupported = errors.New("Transport does not support StartTLS")
+var ErrTLSNotSupported = errors.New("transport does not support StartTLS")
 
 // TODO: rename to transport config?
 type TransportConfiguration struct {
@@ -67,7 +67,7 @@ func NewClientTransport(config TransportConfiguration) Transport {
 // will be returned.
 func NewComponentTransport(config TransportConfiguration) (Transport, error) {
 	if strings.HasPrefix(config.Address, "ws:") || strings.HasPrefix(config.Address, "wss:") {
-		return nil, fmt.Errorf("Components only support XMPP transport: %w", ErrTransportProtocolNotSupported)
+		return nil, fmt.Errorf("components only support XMPP transport: %w", ErrTransportProtocolNotSupported)
 	}
 
 	config.Address = ensurePort(config.Address, 5222)

xmpp_transport.go

@@ -113,7 +113,7 @@ func (t *XMPPTransport) Ping() error {
 		return err
 	}
 	if n != 1 {
-		return errors.New("Could not write ping")
+		return errors.New("could not write ping")
 	}
 	return nil
 }