From aa1e60f584f713cc1b9570dc1b98e3f776f57f8e Mon Sep 17 00:00:00 2001
From: Stefan Sperling <ssperling@sysmocom.de>
Date: Mon, 15 Oct 2018 16:34:07 +0200
Subject: add an IPA test which sends a chopped payload

Add another IPA test to the BTS and BSC test suites.
This new test sends the header in one burst, followed by the
payload which is transmitted byte-per-byte.

The test uses an ID REQ message. If acting as a server, the test
can expect an ID RESP message. However, if acting as a client, the
server will close the connection when it receives the ID REQ.
The CTRL interface port on the BSC does not close the connection in
this case, so that particular port is skipped by the test for now.

Change-Id: If75cb90841bb25619b414f0cabe008a2428a9fdf
Related: OS#2010
Depends: I4804ccabd342b82d44e69dbc6eaaae220ec7d4e4
---
 library/IPA_Testing.ttcn | 62 ++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 62 insertions(+)

(limited to 'library/IPA_Testing.ttcn')

diff --git a/library/IPA_Testing.ttcn b/library/IPA_Testing.ttcn
index a94dd468..413dd31b 100644
--- a/library/IPA_Testing.ttcn
+++ b/library/IPA_Testing.ttcn
@@ -32,6 +32,8 @@ type enumerated IPA_ConnectionMode {
 /* Encoded IPA messages (network byte order) */
 const octetstring ipa_msg_ping := '0001FE00'O;
 const octetstring ipa_msg_pong := '0001FE01'O;
+const octetstring ipa_msg_id_req_hdr := '0007FE'O;
+const octetstring ipa_msg_id_req_payload := '04010801070102'O;
 
 /* A component which represents the system on which the IPA speaker is running. */
 type component system_CT {
@@ -158,6 +160,60 @@ private function f_TC_chopped_ipa_ping(charstring ipa_ip, integer ipa_tcp_port,
 	}
 }
 
+/* Send a complete IPA "ID REQ" message header in one piece, and then send the payload one byte at a time,
+ * waiting for TCP buffer to flush between each byte. */
+private function f_TC_chopped_ipa_payload(charstring ipa_ip, integer ipa_tcp_port,
+					  IPA_ConnectionMode conmode) runs on IPA_CT system system_CT {
+	var ConnectionId connId;
+	var ASP_RecvFrom asp_rx;
+
+	connId := f_init(ipa_ip, ipa_tcp_port, conmode);
+
+	if (conmode == CONNECT_TO_SERVER) {
+		var PortEvent port_evt;
+		f_send_ipa_data(ipa_ip, ipa_tcp_port, connId, ipa_msg_id_req_hdr);
+		f_send_chopped_ipa_msg(ipa_ip, ipa_tcp_port, connId, ipa_msg_id_req_payload);
+		/* Server will close the connection upon receiving an ID REQ. */
+		alt {
+			[] IPL4.receive(PortEvent:{connClosed := ?}) -> value port_evt {
+				if (port_evt.connClosed.connId == connId) {
+					setverdict(pass);
+				} else {
+					repeat;
+				}
+			}
+			[] IPL4.receive {
+				repeat;
+			}
+		}
+	} else {
+		var PortEvent port_evt;
+		IPL4.receive(PortEvent:{connOpened := ?}) -> value port_evt {
+			var ConnectionOpenedEvent conn := port_evt.connOpened;
+			f_send_ipa_data(conn.remName, conn.remPort, conn.connId, ipa_msg_id_req_hdr);
+			f_send_chopped_ipa_msg(conn.remName, conn.remPort, conn.connId, ipa_msg_id_req_payload);
+		}
+
+		/* Expect an encoded IPA ID RESP message from the client. */
+		alt {
+			[] IPL4.receive(t_recvfrom(?)) -> value asp_rx {
+				log("received IPA message from ", asp_rx.remName, " port ", asp_rx.remPort, ": ",
+				    asp_rx.msg);
+				if (lengthof(asp_rx.msg) > 4
+				    and asp_rx.msg[2] == 'FE'O /* PROTO_IPACCESS */
+				    and asp_rx.msg[3] == '05'O /* ID RESP */) {
+					setverdict(pass);
+				} else {
+					repeat;
+				}
+			}
+			[] IPL4.receive {
+				repeat;
+			}
+		}
+	}
+}
+
 /*
  * Public functions.
  * Test suites may call these functions to create an IPA_CT component and run a test to completion.
@@ -169,4 +225,10 @@ function f_run_TC_chopped_ipa_ping(charstring ipa_ip, integer ipa_tcp_port, IPA_
 	vc_IPA_Testing.done;
 }
 
+function f_run_TC_chopped_ipa_payload(charstring ipa_ip, integer ipa_tcp_port, IPA_ConnectionMode conmode) {
+	var IPA_Testing.IPA_CT vc_IPA_Testing := IPA_Testing.IPA_CT.create;
+	vc_IPA_Testing.start(IPA_Testing.f_TC_chopped_ipa_payload(ipa_ip, ipa_tcp_port, conmode));
+	vc_IPA_Testing.done;
+}
+
 }
-- 
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