Tools/NetTest - Add TCP Window test (not passing)

[tpg/acess2.git] / Tools / NetTest_Runner / test_tcp.c

diff --git a/Tools/NetTest_Runner/test_tcp.c b/Tools/NetTest_Runner/test_tcp.c
index 9c4e2e4..36942a5 100644 (file)
--- a/Tools/NetTest_Runner/test_tcp.c
+++ b/Tools/NetTest_Runner/test_tcp.c
@@ -15,18 +15,18 @@
 
 #define TEST_ASSERT_rx()       TEST_ASSERT( rxlen = Net_Receive(0, sizeof(rxbuf), rxbuf, ERX_TIMEOUT) )
 #define TEST_ASSERT_no_rx()    TEST_ASSERT( Net_Receive(0, sizeof(rxbuf), rxbuf, NRX_TIMEOUT) == 0 )
+const int      ERX_TIMEOUT = 1000;     // Expect RX timeout (timeout=failure)
+const int      NRX_TIMEOUT = 250;      // Not expect RX timeout (timeout=success)
+const int      RETX_TIMEOUT = 1000;    // OS PARAM - Retransmit timeout
+const int      LOST_TIMEOUT = 1000;    // OS PARAM - Time before sending an ACK 
+const int      DACK_TIMEOUT = 500;     // OS PARAM - Timeout for delayed ACKs
+const size_t   DACK_BYTES = 4096;      // OS PARAM - Threshold for delayed ACKs
 
 bool Test_TCP_Basic(void)
 {
        TEST_SETNAME(__func__);
        size_t  rxlen, ofs, len;
        char rxbuf[MTU];
-       const int       ERX_TIMEOUT = 1000;     // Expect RX timeout (timeout=failure)
-       const int       NRX_TIMEOUT = 250;      // Not expect RX timeout (timeout=success)
-       const int       RETX_TIMEOUT = 1000;    // OS PARAM - Retransmit timeout
-       const int       LOST_TIMEOUT = 1000;    // OS PARAM - Time before sending an ACK 
-       const int       DACK_TIMEOUT = 500;     // OS PARAM - Timeout for delayed ACKs
-       const size_t    DACK_BYTES = 4096;      // OS PARAM - Threshold for delayed ACKs
 
        tTCPConn        testconn = {
                .IFNum = 0, .AF = 4,
@@ -39,9 +39,11 @@ bool Test_TCP_Basic(void)
                .RSeq = 0,
        };
 
-       const char testblob[] = "HelloWorld, this is some random testing data for TCP\xFF\x00\x66\x12\x12";
+       const char testblob[] = "HelloWorld, this is some random testing data for TCP\xFF\x00\x66\x12\x12.";
        const size_t    testblob_len = sizeof(testblob);
-       
+
+       // TODO: Check checksum failures        
+
        // 1. Test packets to closed port
        // > RFC793 Pg.65
        
@@ -206,8 +208,64 @@ bool Test_TCP_Basic(void)
 
 bool Test_TCP_SYN_RECEIVED(void)
 {
+       TEST_SETNAME(__func__);
        // 1. Get into SYN-RECEIVED
        
        // 2. Send various non-ACK packets
        return false;
 }
+
+bool Test_TCP_WindowSizes(void)
+{
+       TEST_SETNAME(__func__);
+       size_t  rxlen, ofs, len;
+       char rxbuf[MTU];
+       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[152];
+       memset(testdata, 0xAB, sizeof(testdata));
+       
+       Stack_SendCommand("tcp_echo_server %i", testconn.RPort);
+       // > Open Connection
+       TCP_SendC(&testconn, TCP_SYN, 0, NULL);
+       testconn.LSeq ++;
+       TEST_ASSERT_rx();
+       TCP_SkipCheck_Seq(true);
+       TEST_ASSERT( TCP_Pkt_CheckC(rxlen, rxbuf, &ofs, &len, &testconn, TCP_SYN|TCP_ACK) );
+       TEST_ASSERT_REL(len, ==, 0);
+       testconn.RSeq = TCP_Pkt_GetSeq(rxlen, rxbuf, testconn.AF) + 1;
+       TCP_SendC(&testconn, TCP_ACK, 0, NULL);
+       TEST_ASSERT_no_rx();
+       
+       // 1. Test remote respecting our transmission window (>=1 byte)
+       // > Send more data than our RX window
+       TCP_SendC(&testconn, TCP_PSH, sizeof(testdata), testdata);
+       testconn.LSeq += sizeof(testdata);
+       // Expect our RX window back
+       TEST_ASSERT_rx();
+       TEST_ASSERT( TCP_Pkt_CheckC(rxlen, rxbuf, &ofs, &len, &testconn, TCP_ACK|TCP_PSH) );
+       TEST_ASSERT_REL(len, ==, testconn.Window);
+       testconn.RSeq += len;
+       // > Send ACK and reduce window to 1 byte
+       testconn.Window = 1;
+       TCP_SendC(&testconn, TCP_ACK, 0, NULL);
+       testconn.LSeq += sizeof(testdata);
+       // > Expect 1 byte back
+       TEST_ASSERT_rx();
+       TEST_ASSERT( TCP_Pkt_CheckC(rxlen, rxbuf, &ofs, &len, &testconn, TCP_ACK|TCP_PSH) );
+       TEST_ASSERT_REL(len, ==, 1);
+       testconn.RSeq += len;
+       // 2. Test remote handling our window being 0 (should only send ACKs)
+       // 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
+       return false;
+}