+#endif
+
+bool Test_TCP_Reset(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
+ };
+
+ Stack_SendCommand("tcp_echo_server %i", testconn.RPort);
+
+ // 1. Response in listen-based SYN-RECEIVED
+ // >> SYN
+ TCP_SendC(&testconn, TCP_SYN, 0, NULL);
+ testconn.LSeq ++;
+ // << SYN|ACK :: Now in SYN-RECEIVED
+ 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;
+ // >> RST (not ACK)
+ TCP_SendC(&testconn, TCP_RST, 0, NULL);
+ // << nothing (connection should now be dead)
+ TEST_ASSERT_no_rx();
+ // >> ACK (this should be to a closed conneciton, see LISTEN[ACK] above)
+ TCP_SendC(&testconn, TCP_ACK, 0, NULL);
+ // << RST
+ TEST_ASSERT_rx();
+ TEST_ASSERT( TCP_Pkt_CheckC(rxlen, rxbuf, &ofs, &len, &testconn, TCP_RST) );
+ TEST_ASSERT_REL(len, ==, 0);
+
+ // 2. Response in open-based SYN-RECEIVED? (What is that?)
+ TEST_WARN("TODO: RFC793 pg70 mentions OPEN-based SYN-RECEIVED");
+
+ testconn.LPort += 1234;
+ // ESTABLISHED[RST] - RFC793:Pg70
+ // 2. Response in ESTABLISHED
+ TEST_ASSERT( Test_TCP_int_OpenConnection(&testconn) );
+ // >> RST
+ TCP_SendC(&testconn, TCP_RST, 0, NULL);
+ // << no response, connection closed
+ TEST_ASSERT_no_rx();
+ // >> ACK (LISTEN[ACK])
+ TCP_SendC(&testconn, TCP_ACK, 0, NULL);
+ // << RST
+ TEST_ASSERT_rx();
+ TEST_ASSERT( TCP_Pkt_CheckC(rxlen, rxbuf, &ofs, &len, &testconn, TCP_RST) );
+ TEST_ASSERT_REL(len, ==, 0);
+
+ return true;
+}
+
+bool Test_TCP_WindowSizes(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[152];
+ memset(testdata, 0xAB, sizeof(testdata));
+
+ Stack_SendCommand("tcp_echo_server %i", testconn.RPort);
+ // > Open Connection
+ TEST_ASSERT( Test_TCP_int_OpenConnection(&testconn) );
+
+ // 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)
+ // 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();
+
+ return false;
+}