Do not use ':' as a namespace separator with expat

Instead use \1, and build our own nodes by explicitely separating the
namespace and the node name.

src/xmpp/adhoc_command.cpp

@@ -26,7 +26,7 @@ void PingStep1(XmppComponent&, AdhocSession&, XmlNode& command_node)
 
 void HelloStep1(XmppComponent&, AdhocSession&, XmlNode& command_node)
 {
-  XmlSubNode x(command_node, "jabber:x:data:x");
+  XmlSubNode x(command_node, "jabber:x:data", "x");
   x["type"] = "form";
   XmlSubNode title(x, "title");
   title.set_inner("Configure your name.");
@@ -65,9 +65,9 @@ void HelloStep2(XmppComponent&, AdhocSession& session, XmlNode& command_node)
         }
     }
   command_node.delete_all_children();
-  XmlSubNode error(command_node, ADHOC_NS":error");
+  XmlSubNode error(command_node, ADHOC_NS, "error");
   error["type"] = "modify";
-  XmlSubNode condition(error, STANZA_NS":bad-request");
+  XmlSubNode condition(error, STANZA_NS, "bad-request");
   session.terminate();
 }
 

src/xmpp/adhoc_commands_handler.cpp

@@ -36,16 +36,16 @@ XmlNode AdhocCommandsHandler::handle_request(const std::string& executor_jid, co
   auto command_it = this->commands.find(node);
   if (command_it == this->commands.end())
     {
-      XmlSubNode error(command_node, ADHOC_NS":error");
+      XmlSubNode error(command_node, ADHOC_NS, "error");
       error["type"] = "cancel";
-      XmlSubNode condition(error, STANZA_NS":item-not-found");
+      XmlSubNode condition(error, STANZA_NS, "item-not-found");
     }
   else if (command_it->second.is_admin_only() &&
            !Config::is_in_list("admin", jid.bare()))
     {
-      XmlSubNode error(command_node, ADHOC_NS":error");
+      XmlSubNode error(command_node, ADHOC_NS, "error");
       error["type"] = "cancel";
-      XmlSubNode condition(error, STANZA_NS":forbidden");
+      XmlSubNode condition(error, STANZA_NS, "forbidden");
     }
   else
     {
@@ -94,9 +94,9 @@ XmlNode AdhocCommandsHandler::handle_request(const std::string& executor_jid, co
         }
       else                      // unsupported action
         {
-          XmlSubNode error(command_node, ADHOC_NS":error");
+          XmlSubNode error(command_node, ADHOC_NS, "error");
           error["type"] = "modify";
-          XmlSubNode condition(error, STANZA_NS":bad-request");
+          XmlSubNode condition(error, STANZA_NS, "bad-request");
         }
     }
   return command_node;

src/xmpp/biboumi_adhoc_commands.cpp

@@ -34,7 +34,7 @@ void DisconnectUserStep1(XmppComponent& xmpp_component, AdhocSession&, XmlNode&
 {
   auto& biboumi_component = dynamic_cast<BiboumiComponent&>(xmpp_component);
 
-  XmlSubNode x(command_node, "jabber:x:data:x");
+  XmlSubNode x(command_node, "jabber:x:data", "x");
   x["type"] = "form";
   XmlSubNode title(x, "title");
   title.set_inner("Disconnect a user from the gateway");
@@ -108,9 +108,9 @@ void DisconnectUserStep2(XmppComponent& xmpp_component, AdhocSession& session, X
           return;
         }
     }
-  XmlSubNode error(command_node, ADHOC_NS":error");
+  XmlSubNode error(command_node, ADHOC_NS, "error");
   error["type"] = "modify";
-  XmlSubNode condition(error, STANZA_NS":bad-request");
+  XmlSubNode condition(error, STANZA_NS, "bad-request");
   session.terminate();
 }
 
@@ -124,7 +124,7 @@ void ConfigureGlobalStep1(XmppComponent&, AdhocSession& session, XmlNode& comman
   auto options = Database::get_global_options(owner.bare());
 
   command_node.delete_all_children();
-  XmlSubNode x(command_node, "jabber:x:data:x");
+  XmlSubNode x(command_node, "jabber:x:data", "x");
   x["type"] = "form";
   XmlSubNode title(x, "title");
   title.set_inner("Configure some global default settings.");
@@ -220,9 +220,9 @@ void ConfigureGlobalStep2(XmppComponent& xmpp_component, AdhocSession& session,
       note.set_inner("Configuration successfully applied.");
       return;
     }
-  XmlSubNode error(command_node, ADHOC_NS":error");
+  XmlSubNode error(command_node, ADHOC_NS, "error");
   error["type"] = "modify";
-  XmlSubNode condition(error, STANZA_NS":bad-request");
+  XmlSubNode condition(error, STANZA_NS, "bad-request");
   session.terminate();
 }
 
@@ -238,7 +238,7 @@ void ConfigureIrcServerStep1(XmppComponent&, AdhocSession& session, XmlNode& com
   auto commands = Database::get_after_connection_commands(options);
 
   command_node.delete_all_children();
-  XmlSubNode x(command_node, "jabber:x:data:x");
+  XmlSubNode x(command_node, "jabber:x:data", "x");
   x["type"] = "form";
   XmlSubNode title(x, "title");
   title.set_inner("Configure the IRC server " + server_domain);
@@ -565,9 +565,9 @@ void ConfigureIrcServerStep2(XmppComponent& xmpp_component, AdhocSession& sessio
       note.set_inner("Configuration successfully applied.");
       return;
     }
-  XmlSubNode error(command_node, ADHOC_NS":error");
+  XmlSubNode error(command_node, ADHOC_NS, "error");
   error["type"] = "modify";
-  XmlSubNode condition(error, STANZA_NS":bad-request");
+  XmlSubNode condition(error, STANZA_NS, "bad-request");
   session.terminate();
 }
 
@@ -586,7 +586,7 @@ void insert_irc_channel_configuration_form(XmlNode& node, const Jid& requester,
   auto options = Database::get_irc_channel_options_with_server_default(requester.local + "@" + requester.domain,
                                                                        iid.get_server(), iid.get_local());
   node.delete_all_children();
-  XmlSubNode x(node, "jabber:x:data:x");
+  XmlSubNode x(node, "jabber:x:data", "x");
   x["type"] = "form";
   XmlSubNode title(x, "title");
   title.set_inner("Configure the IRC channel " + iid.get_local() + " on server " + iid.get_server());
@@ -671,9 +671,9 @@ void ConfigureIrcChannelStep2(XmppComponent& xmpp_component, AdhocSession& sessi
     }
   else
     {
-      XmlSubNode error(command_node, ADHOC_NS":error");
+      XmlSubNode error(command_node, ADHOC_NS, "error");
       error["type"] = "modify";
-      XmlSubNode condition(error, STANZA_NS":bad-request");
+      XmlSubNode condition(error, STANZA_NS, "bad-request");
       session.terminate();
     }
 }
@@ -749,7 +749,7 @@ void DisconnectUserFromServerStep1(XmppComponent& xmpp_component, AdhocSession&
     { // Send a form to select the user to disconnect
       auto& biboumi_component = dynamic_cast<BiboumiComponent&>(xmpp_component);
 
-      XmlSubNode x(command_node, "jabber:x:data:x");
+      XmlSubNode x(command_node, "jabber:x:data", "x");
       x["type"] = "form";
       XmlSubNode title(x, "title");
       title.set_inner("Disconnect a user from selected IRC servers");
@@ -794,7 +794,7 @@ void DisconnectUserFromServerStep2(XmppComponent& xmpp_component, AdhocSession&
   command_node.delete_all_children();
   auto& biboumi_component = dynamic_cast<BiboumiComponent&>(xmpp_component);
 
-  XmlSubNode x(command_node, "jabber:x:data:x");
+  XmlSubNode x(command_node, "jabber:x:data", "x");
   x["type"] = "form";
   XmlSubNode title(x, "title");
   title.set_inner("Disconnect a user from selected IRC servers");

src/xmpp/xmpp_component.cpp

@@ -175,7 +175,7 @@ void XmppComponent::on_stanza(const Stanza& stanza)
 
 void XmppComponent::send_stream_error(const std::string& name, const std::string& explanation)
 {
-  Stanza node("stream:error");
+  Stanza node("stream", "error");
   {
     XmlSubNode error(node, name);
     error["xmlns"] = STREAM_NS;

src/xmpp/xmpp_parser.cpp

@@ -38,7 +38,7 @@ XmppParser::XmppParser():
 void XmppParser::init_xml_parser()
 {
   // Create the expat parser
-  this->parser = XML_ParserCreateNS("UTF-8", ':');
+  this->parser = XML_ParserCreateNS("UTF-8", '\1');
   XML_SetUserData(this->parser, static_cast<void*>(this));
 
   // Install Expat handlers

src/xmpp/xmpp_parser.hpp

@@ -18,9 +18,9 @@
  * stanza is reasonnably short.
  *
  * The element names generated by expat contain the namespace of the
- * element, a colon (':') and then the actual name of the element.  To get
+ * element, a \1 separator and then the actual name of the element.  To get
  * an element "x" with a namespace of "http://jabber.org/protocol/muc", you
- * just look for an XmlNode named "http://jabber.org/protocol/muc:x"
+ * just look for an XmlNode named "http://jabber.org/protocol/muc\1x"
  *
  * TODO: enforce the size-limit for the stanza (limit the number of childs
  * it can contain). For example forbid the parser going further than level

src/xmpp/xmpp_stanza.cpp

@@ -52,7 +52,7 @@ XmlNode::XmlNode(const std::string& name, XmlNode* parent):
   parent(parent)
 {
   // split the namespace and the name
-  auto n = name.rfind(':');
+  auto n = name.rfind('\1');
   if (n == std::string::npos)
     this->name = name;
   else
@@ -67,6 +67,18 @@ XmlNode::XmlNode(const std::string& name):
 {
 }
 
+XmlNode::XmlNode(const std::string& xmlns, const std::string& name, XmlNode* parent):
+    name(name),
+    parent(parent)
+{
+  this->attributes["xmlns"] = xmlns;
+}
+
+XmlNode::XmlNode(const std::string& xmlns, const std::string& name):
+    XmlNode(xmlns, name, nullptr)
+{
+}
+
 void XmlNode::delete_all_children()
 {
   this->children.clear();

src/xmpp/xmpp_stanza.hpp

@@ -25,6 +25,8 @@ class XmlNode
 public:
   explicit XmlNode(const std::string& name, XmlNode* parent);
   explicit XmlNode(const std::string& name);
+  explicit XmlNode(const std::string& xmlns, const std::string& name, XmlNode* parent);
+  explicit XmlNode(const std::string& xmlns, const std::string& name);
   /**
    * The copy constructor does not copy the parent attribute. The children
    * nodes are all copied recursively.
@@ -150,6 +152,10 @@ public:
             XmlNode(name),
             parent_to_add(parent_ref)
     {}
+    XmlSubNode(XmlNode& parent_ref, const std::string& xmlns, const std::string& name):
+        XmlNode(xmlns, name),
+        parent_to_add(parent_ref)
+    {}
 
     ~XmlSubNode()
     {

tests/xmpp.cpp

@@ -67,6 +67,8 @@ TEST_CASE("substanzas")
       CHECK(!d.has_children());
     }
     CHECK(b.has_children());
+    XmlSubNode e(a, "namespace", "name");
+    CHECK(e.get_tag("xmlns") == "namespace");
   }
   CHECK(a.has_children());
 }