From dd1cb9c23392d4d43198d60879fecf61fe4503b7 Mon Sep 17 00:00:00 2001
From: xengineering <me@xengineering.eu>
Date: Fri, 30 Jun 2023 14:08:04 +0200
Subject: Implement detection of resource binding offer

This allows to trigger resource binding if the stream supports it.
---
 xmpp/jid.go | 19 +++++++++++++++++++
 1 file changed, 19 insertions(+)

(limited to 'xmpp/jid.go')

diff --git a/xmpp/jid.go b/xmpp/jid.go
index 90c1509..d7107d4 100644
--- a/xmpp/jid.go
+++ b/xmpp/jid.go
@@ -1,5 +1,9 @@
 package xmpp
 
+import (
+	"encoding/xml"
+)
+
 // domainpart extracts the domain name from a JID / XMPP address. See
 // https://datatracker.ietf.org/doc/html/rfc7622#section-3.2 for details.
 func domainpart(jid string) string {
@@ -33,3 +37,18 @@ func username(jid string) string {
 
 	return ""
 }
+
+func hasBind(e []xml.Token) bool {
+	bind := xml.Name{`urn:ietf:params:xml:ns:xmpp-bind`, `bind`}
+
+	for _, v := range e {
+		switch s := v.(type) {
+		case xml.StartElement:
+			if s.Name == bind {
+				return true
+			}
+		}
+	}
+
+	return false
+}
-- 
cgit v1.2.3-70-g09d2


From 62a17dd6584009cad58fceee6b1ada74edf1d38f Mon Sep 17 00:00:00 2001
From: xengineering <me@xengineering.eu>
Date: Fri, 30 Jun 2023 14:32:58 +0200
Subject: Implement resource binding request

This is the first step of resource binding which is a mandatory part of
establishing an XMPP connection.
---
 xmpp/jid.go         | 46 ++++++++++++++++++++++++++++++++++++++++++++++
 xmpp/stream_pair.go |  2 +-
 2 files changed, 47 insertions(+), 1 deletion(-)

(limited to 'xmpp/jid.go')

diff --git a/xmpp/jid.go b/xmpp/jid.go
index d7107d4..138744c 100644
--- a/xmpp/jid.go
+++ b/xmpp/jid.go
@@ -2,6 +2,9 @@ package xmpp
 
 import (
 	"encoding/xml"
+	"log"
+	"fmt"
+	"math/rand"
 )
 
 // domainpart extracts the domain name from a JID / XMPP address. See
@@ -52,3 +55,46 @@ func hasBind(e []xml.Token) bool {
 
 	return false
 }
+
+func (s *session) sendBind() {
+	iqStart := xml.StartElement{
+		xml.Name{"jabber:client", "iq"},
+		[]xml.Attr{
+			xml.Attr{xml.Name{"", "id"}, fmt.Sprintf("%016x", rand.Uint64())},
+			xml.Attr{xml.Name{"", "type"}, "set"},
+		},
+	}
+	iqEnd := iqStart.End()
+
+	bindStart := xml.StartElement{
+		xml.Name{"urn:ietf:params:xml:ns:xmpp-bind", "bind"},
+		[]xml.Attr{},
+	}
+	bindEnd := bindStart.End()
+
+	resourceStart := xml.StartElement{
+		xml.Name{"", "resource"},
+		[]xml.Attr{},
+	}
+	resourceEnd := resourceStart.End()
+
+	name := xml.CharData("limox-" + fmt.Sprintf("%08x", rand.Uint32()))
+
+	tokens := [...]xml.Token{
+		iqStart,
+		bindStart,
+		resourceStart,
+		name,
+		resourceEnd,
+		bindEnd,
+		iqEnd,
+	}
+
+	for _, v := range tokens {
+		err := s.ed.encodeToken(v)
+		if err != nil {
+			log.Println("Could not encode ressource binding!")
+			return
+		}
+	}
+}
diff --git a/xmpp/stream_pair.go b/xmpp/stream_pair.go
index 9be880f..4690f57 100644
--- a/xmpp/stream_pair.go
+++ b/xmpp/stream_pair.go
@@ -99,7 +99,7 @@ func streamFeaturesHandler(s *session, e []xml.Token) {
 	}
 
 	if hasBind(e) {
-		log.Println("Stream supports ressource binding")
+		s.sendBind()
 		return
 	}
 
-- 
cgit v1.2.3-70-g09d2


From d30e2cd84ac54f4ea86f430249f09e272fe9a800 Mon Sep 17 00:00:00 2001
From: xengineering <me@xengineering.eu>
Date: Fri, 30 Jun 2023 20:02:53 +0200
Subject: Apply go fmt

---
 xmpp/jid.go | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

(limited to 'xmpp/jid.go')

diff --git a/xmpp/jid.go b/xmpp/jid.go
index 138744c..0446d19 100644
--- a/xmpp/jid.go
+++ b/xmpp/jid.go
@@ -2,8 +2,8 @@ package xmpp
 
 import (
 	"encoding/xml"
-	"log"
 	"fmt"
+	"log"
 	"math/rand"
 )
 
-- 
cgit v1.2.3-70-g09d2