Tools/NetTest - Add TCP retransmit test

diff --git a/Tools/NetTest_Runner/test_tcp.c b/Tools/NetTest_Runner/test_tcp.c
index 10e9163..b0ba915 100644 (file)
--- a/Tools/NetTest_Runner/test_tcp.c
+++ b/Tools/NetTest_Runner/test_tcp.c
@@ -4,6 +4,7 @@
  *
  * test_tcp.c
  * - Tests for the behavior of the "Transmission Control Protocol"
+ * - These tests are written off RFC793
  */
 #include "test.h"
 #include "tests.h"
@@ -347,7 +348,45 @@ bool Test_TCP_WindowSizes(void)
        TEST_ASSERT_REL(len, ==, 1);
        testconn.RSeq += len;
        // 2. Test remote handling our window being 0 (should only send ACKs)
+       // TODO: 
        // 3. Test that remote drops data outside of its RX window
        // 3.1. Ensure that data that wraps the end of the RX window is handled correctly
+       // TODO: 
        return false;
 }
+
+// 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();
+}