Problem: Message metadata properties still refer to "identity"

Solution: Renamed, but support querying the property by its old name

include/zmq.h

@@ -622,8 +622,7 @@ ZMQ_EXPORT int zmq_msg_set_group(zmq_msg_t *msg, const char *group);
 ZMQ_EXPORT const char *zmq_msg_group(zmq_msg_t *msg);
 
 /*  DRAFT Msg property names.                                                 */
-// TODO the name of the define AND its value are now inconsistent with the new term "routing id"
-#define ZMQ_MSG_PROPERTY_IDENTITY      "Identity"
+#define ZMQ_MSG_PROPERTY_ROUTING_ID    "Routing-Id"
 #define ZMQ_MSG_PROPERTY_SOCKET_TYPE   "Socket-Type"
 #define ZMQ_MSG_PROPERTY_USER_ID       "User-Id"
 #define ZMQ_MSG_PROPERTY_PEER_ADDRESS  "Peer-Address"

src/mechanism.cpp

@@ -132,11 +132,11 @@ size_t zmq::mechanism_t::add_basic_properties (unsigned char *buf,
                          ZMQ_MSG_PROPERTY_SOCKET_TYPE, socket_type,
                          strlen (socket_type));
 
-    //  Add identity property
+    //  Add routing id property
     if (options.type == ZMQ_REQ || options.type == ZMQ_DEALER
         || options.type == ZMQ_ROUTER)
         ptr += add_property (ptr, buf_capacity - (ptr - buf),
-                             ZMQ_MSG_PROPERTY_IDENTITY, options.routing_id,
+                             ZMQ_MSG_PROPERTY_ROUTING_ID, options.routing_id,
                              options.routing_id_size);
 
     return ptr - buf;
@@ -148,7 +148,7 @@ size_t zmq::mechanism_t::basic_properties_len() const
     return property_len (ZMQ_MSG_PROPERTY_SOCKET_TYPE, strlen (socket_type))
            + ((options.type == ZMQ_REQ || options.type == ZMQ_DEALER
                || options.type == ZMQ_ROUTER)
-                ? property_len (ZMQ_MSG_PROPERTY_IDENTITY,
+                ? property_len (ZMQ_MSG_PROPERTY_ROUTING_ID,
                                 options.routing_id_size)
                 : 0);
 }
@@ -199,7 +199,7 @@ int zmq::mechanism_t::parse_metadata (const unsigned char *ptr_,
         ptr_ += value_length;
         bytes_left -= value_length;
 
-        if (name == ZMQ_MSG_PROPERTY_IDENTITY && options.recv_routing_id)
+        if (name == ZMQ_MSG_PROPERTY_ROUTING_ID && options.recv_routing_id)
             set_peer_routing_id (value, value_length);
         else
         if (name == ZMQ_MSG_PROPERTY_SOCKET_TYPE) {

src/metadata.cpp

@@ -39,8 +39,14 @@ zmq::metadata_t::metadata_t (const dict_t &dict) :
 const char *zmq::metadata_t::get (const std::string &property) const
 {
     dict_t::const_iterator it = dict.find (property);
-    if (it == dict.end ())
+    if (it == dict.end())
+    {
+        /** \todo remove this when support for the deprecated name "Identity" is dropped */
+        if (property == "Identity")
+            return get (ZMQ_MSG_PROPERTY_ROUTING_ID);
+
         return NULL;
+    }
     else
         return it->second.c_str ();
 }