+
+// RFC793 pg41
+bool Test_TCP_Retransmit(void)
+{
+ TEST_HEADER;
+ tTCPConn testconn = {
+ .IFNum = 0,
+ .AF = 4,
+ .LAddr = BLOB(HOST_IP),
+ .RAddr = BLOB(TEST_IP),
+ .LPort = 44359,
+ .RPort = 9,
+ .LSeq = 0x600,
+ .RSeq = 0x600,
+ .Window = 128
+ };
+ char testdata[128];
+ memset(testdata, 0xAB, sizeof(testdata));
+
+ TEST_STEP("1. Open and connect to TCP server");
+ Stack_SendCommand("tcp_echo_server %i", testconn.RPort);
+ TEST_ASSERT( Test_TCP_int_OpenConnection(&testconn) );
+
+
+ TEST_STEP("2. Send data and expect it to be echoed");
+ TCP_SendC(&testconn, TCP_PSH, sizeof(testdata), testdata);
+ testconn.LSeq += sizeof(testdata);
+ TEST_ASSERT_rx();
+ TEST_ASSERT( TCP_Pkt_CheckC(rxlen, rxbuf, &ofs, &len, &testconn, TCP_ACK|TCP_PSH) );
+
+ TEST_STEP("3. Expect nothing for TCP_RTX_TIMEOUT_1");
+ TEST_ASSERT( Net_Receive(0, sizeof(rxbuf), rxbuf, RETX_TIMEOUT-100) == 0 )
+
+ TEST_STEP("4. Expect a retransmit");
+ TEST_ASSERT_rx();
+}