Revert "Revert "aqhome: convenience code.""

This reverts commit bb77c6acd1.

aqhome/ipc/data/cmd_data.c

@@ -0,0 +1,44 @@
+
+
+
+
+
+GWEN_MSG *AQH_CmdDataIpc_WaitForSpecificIpcMessage(GWEN_MSG_ENDPOINT *epTcp, int msgCode, int timeoutInSeconds)
+{
+  time_t startTime;
+
+  startTime=time(NULL);
+
+  for (;;) {
+    GWEN_MSG *msg;
+    time_t now;
+
+    while( (msg=GWEN_MsgEndpoint_TakeFirstReceivedMessage(epTcp)) ) {
+      uint16_t code;
+
+      code=GWEN_IpcMsg_GetCode(msg);
+      if (code==msgCode) {
+        DBG_INFO(NULL, "Received expected IPC message");
+        return msg;
+      }
+      else if (code==AQH_MSGTYPE_IPC_DATA_RESULT) {
+        DBG_INFO(NULL, "Received IPC result message");
+        return msg;
+      }
+      else {
+        DBG_INFO(NULL, "Received unexpected message %d (%x)", code, code);
+      }
+      GWEN_Msg_free(msg);
+    }
+    now=time(NULL);
+    if (now-startTime>timeoutInSeconds) {
+      DBG_INFO(NULL, "Timeout");
+      break;
+    }
+    GWEN_MsgEndpoint_IoLoop(epTcp, 2000); /* 2000 ms */
+  }
+
+  return NULL;
+}
+
+