Add options

pyVoIP/SIP.py

@@ -926,6 +926,12 @@ def parse_message(self, message: SIPMessage) -> None:
             self.call_callback(message)  # type: ignore
             response = self.gen_ok(message)
             self.out.sendto(response.encode("utf8"), (self.server, self.port))
+        elif message.method == "OPTIONS":
+            if self.call_callback:
+                response = self.call_callback(message)
+            else:
+                response = self._gen_options_response(message)
+            self.out.sendto(response.encode("utf8"), (self.server, self.port))
         else:
             debug("TODO: Add 400 Error on non processable request")
 
@@ -1393,6 +1399,9 @@ def gen_ack(self, request: SIPMessage) -> str:
 
         return ackMessage
 
+    def _gen_options_response(self, request: SIPMessage) -> str:
+        return self.gen_busy(request)
+
     def _gen_response_via_header(self, request: SIPMessage) -> str:
         via = ""
         for h_via in request.headers["Via"]:

pyVoIP/VoIP.py

@@ -449,14 +449,16 @@ def __init__(
             transport_mode=self.transport_mode,
         )
 
-    def callback(self, request: SIP.SIPMessage) -> None:
+    def callback(self, request: SIP.SIPMessage) -> Optional[str]:
         # debug("Callback: "+request.summary())
         if request.type == pyVoIP.SIP.SIPMessageType.MESSAGE:
             # debug("This is a message")
             if request.method == "INVITE":
                 self._callback_MSG_Invite(request)
             elif request.method == "BYE":
                 self._callback_MSG_Bye(request)
+            elif request.method == "OPTIONS":
+                return self._callback_MSG_Options(request)
         else:
             if request.status == SIP.SIPStatus.OK:
                 self._callback_RESP_OK(request)
@@ -520,6 +522,14 @@ def _callback_MSG_Bye(self, request: SIP.SIPMessage) -> None:
             return
         self.calls[call_id].bye()
 
+    def _callback_MSG_Options(self, request: SIP.SIPMessage) -> str:
+        debug("Options recieved")
+        response = self.sip.gen_busy(request)
+        if self.call_callback:
+            response = response.replace("486 Busy Here", "200 OK")
+            # TODO: Remove warning, implement RFC 3264
+        return response
+
     def _callback_RESP_OK(self, request: SIP.SIPMessage) -> None:
         debug("OK recieved")
         call_id = request.headers["Call-ID"]

pyVoIP/__init__.py

@@ -24,7 +24,7 @@ def debug(s, e=None):
 # noqa because import will fail if debug is not defined
 from pyVoIP.RTP import PayloadType  # noqa: E402
 
-SIPCompatibleMethods = ["INVITE", "ACK", "BYE", "CANCEL"]
+SIPCompatibleMethods = ["INVITE", "ACK", "BYE", "CANCEL", "OPTIONS"]
 SIPCompatibleVersions = ["SIP/2.0"]
 
 RTPCompatibleVersions = [2]