Target delay can be specified via Python API.

prrt/prrt.pyx

@@ -73,13 +73,17 @@ cdef class PrrtSocket:
         cprrt.PrrtSocket_bind(self._c_socket, "0.0.0.0", port)
         self.isSender = isSender
 
-    @property
-    def target_delay(self):
-        return cprrt.PrrtSocket_get_sock_opt(self._c_socket, "targetdelay")
+    property target_delay:
 
-    @target_delay.setter
-    def target_delay(self, value):
-        cprrt.PrrtSocket_set_sock_opt(self._c_socket, "targetdelay", value)
+        def __get__(self):
+            if not self.isSender:
+                raise Exception("Not a sender.")
+            return cprrt.PrrtSocket_get_sock_opt(self._c_socket, "targetdelay")
+
+        def __set__(self, value):
+            if not self.isSender:
+                raise Exception("Not a sender.")
+            cprrt.PrrtSocket_set_sock_opt(self._c_socket, "targetdelay", value)
 
     def recv(self):
         cdef char buffer[65536]

tests/perf/__init__.py

@@ -37,6 +37,7 @@ class SenderThread(threading.Thread):
     def __init__(self, seqnoDigits, packetCount):
         threading.Thread.__init__(self)
         self.sock = prrt.PrrtSocket(7005, True)
+        self.sock.target_delay = 1000**3
         self.packetCount = packetCount
         self.seqnoDigits = seqnoDigits