/***************************************************************************/
/* Copyright (c) 2024 Microsoft Corporation                                */
/* Copyright (c) 2026 Eclipse ThreadX contributors                         */
/*                                                                         */
/* This program and the accompanying materials are made available under    */
/* the terms of the MIT License which is available at                      */
/* https://opensource.org/licenses/MIT.                                    */
/*                                                                         */
/* SPDX-License-Identifier: MIT                                            */
/***************************************************************************/

/* 1.04 TCP, in CLOSED state, must send a RST segment with zero SEQ number
in response to an incoming segment not containing RST and ACK flags.  */

/* Procedure
1. Create server and client sockets.
2. Let the client socket connect to the server socket in order to send a segment not containing RST and ACK flags.
3. Check if the server socket is in CLOSED state.
4. Check if the packet is a segment not containing RST and ACK flags.
5. Let the server socket receive the segment and send a RST segment.
6. Check if the packet is the RST segment with zero SEQ number.
7. Let the client socket receive the RST segment.
8. Check the error_counter and rst_counter.  */

#include    "tx_api.h"
#include    "nx_api.h"
#include    "nx_tcp.h"
extern void    test_control_return(UINT status);

#if !defined(NX_DISABLE_IPV4)

#define     DEMO_STACK_SIZE    2048

/* Define the ThreadX and NetX object control blocks...  */

static TX_THREAD               ntest_0;
static TX_THREAD               ntest_1;

static NX_PACKET_POOL          pool_0;
static NX_IP                   ip_0;
static NX_IP                   ip_1;
static NX_TCP_SOCKET           client_socket;
static NX_TCP_SOCKET           server_socket;

/* Define the counters used in the demo application...  */

static ULONG                   error_counter;
static ULONG                   rst_counter;
static UINT                    seg_counter;

/* Define thread prototypes.  */
static void    ntest_0_entry(ULONG thread_input);
static void    ntest_1_entry(ULONG thread_input);
static void    ntest_0_disconnect_received(NX_TCP_SOCKET *server_socket);
extern void    _nx_ram_network_driver(struct NX_IP_DRIVER_STRUCT *driver_req);
static void    my_tcp_packet_receive_1_04(NX_IP *ip_ptr, NX_PACKET *packet_ptr);
static void    my_tcp_packet_receive_1_04_2(NX_IP *ip_ptr, NX_PACKET *packet_ptr);

/* Define what the initial system looks like.  */

#ifdef CTEST
VOID test_application_define(void *first_unused_memory)
#else
void           netx_1_04_application_define(void *first_unused_memory)
#endif
{
CHAR       *pointer;
UINT       status;

    /* Setup the working pointer.  */
    pointer = (CHAR *) first_unused_memory;

    error_counter = 0;
    rst_counter = 0;
    seg_counter = 0;

    /* Create the main thread.  */
    tx_thread_create(&ntest_0, "thread 0", ntest_0_entry, 0,  
                     pointer, DEMO_STACK_SIZE, 
                     3, 3, TX_NO_TIME_SLICE, TX_AUTO_START);

    pointer = pointer + DEMO_STACK_SIZE;

    /* Create the main thread.  */
    tx_thread_create(&ntest_1, "thread 1", ntest_1_entry, 0,  
                     pointer, DEMO_STACK_SIZE, 
                     4, 4, TX_NO_TIME_SLICE, TX_AUTO_START);

    pointer = pointer + DEMO_STACK_SIZE;

    /* Initialize the NetX system.  */
    nx_system_initialize();

    /* Create a packet pool.  */
    status = nx_packet_pool_create(&pool_0, "NetX Main Packet Pool", 256, pointer, 8192);
    pointer = pointer + 8192;

    if(status)
        error_counter++;

    /* Create an IP instance.  */
    status = nx_ip_create(&ip_0, "NetX IP Instance 0", IP_ADDRESS(1, 2, 3, 4), 0xFFFFFF00UL, &pool_0, _nx_ram_network_driver,
                          pointer, 2048, 1);
    pointer = pointer + 2048;

    /* Create another IP instance.  */
    status += nx_ip_create(&ip_1, "NetX IP Instance 1", IP_ADDRESS(1, 2, 3, 5), 0xFFFFFF00UL, &pool_0, _nx_ram_network_driver,
                           pointer, 2048, 2);
    pointer = pointer + 2048;
    if(status)
        error_counter++;

    /* Enable ARP and supply ARP cache memory for IP Instance 0.  */
    status = nx_arp_enable(&ip_0, (void *) pointer, 1024);
    pointer = pointer + 1024;
    if(status)
        error_counter++;

    /* Enable ARP and supply ARP cache memory for IP Instance 1.  */
    status = nx_arp_enable(&ip_1, (void *) pointer, 1024);
    pointer = pointer + 1024;
    if(status)
        error_counter++;

    /* Enable TCP processing for both IP instances.  */
    status = nx_tcp_enable(&ip_0);
    status += nx_tcp_enable(&ip_1);

    /* Check TCP enable status.  */
    if(status)
        error_counter++;
}

/* Define the test threads.  */

static void    ntest_0_entry(ULONG thread_input)
{
UINT       status;
ULONG      actual_status;

    /* Print out test information banner.  */
    printf("NetX Test:   TCP Spec 1.04 Test........................................");

    /* Check for earlier error.  */
    if(error_counter)
    {
        printf("ERROR!\n");
        test_control_return(1);
    }

    /* Ensure the IP instance has been initialized.  */
    status = nx_ip_status_check(&ip_0, NX_IP_INITIALIZE_DONE, &actual_status, NX_IP_PERIODIC_RATE);

    /* Check status...  */
    if(status)
        error_counter++;

    /* Create a socket.  */
    status = nx_tcp_socket_create(&ip_0, &server_socket, "Server Socket", 
                                  NX_IP_NORMAL, NX_FRAGMENT_OKAY, NX_IP_TIME_TO_LIVE, 200,
                                  NX_NULL, ntest_0_disconnect_received);

    /* Check for error.  */
    if(status)
        error_counter++;

    /* Let client checks the packet.  */
    ip_0.nx_ip_tcp_packet_receive = my_tcp_packet_receive_1_04;

    tx_thread_suspend(&ntest_0);

    /* Delete the socket.  */
    status = nx_tcp_socket_delete(&server_socket);

    /* Check for error.  */
    if(status)
        error_counter++;

}

static void    ntest_1_entry(ULONG thread_input)
{
UINT       status;


    /* Create a socket.  */
    status = nx_tcp_socket_create(&ip_1, &client_socket, "Client Socket", 
                                  NX_IP_NORMAL, NX_FRAGMENT_OKAY, NX_IP_TIME_TO_LIVE, 300,
                                  NX_NULL, NX_NULL);

    /* Check for error.  */
    if(status)
        error_counter++;

    /* Bind the socket.  */
    status = nx_tcp_client_socket_bind(&client_socket, 12, NX_IP_PERIODIC_RATE);

    /* Check for error.  */
    if(status)
        error_counter++;

    /* Let client checks the packet.  */
    ip_1.nx_ip_tcp_packet_receive = my_tcp_packet_receive_1_04_2;

    /* Call connect to establish a TCP connection*/ 
    status = nx_tcp_client_socket_connect(&client_socket, IP_ADDRESS(1, 2, 3, 4), 12, 50);

    tx_thread_resume(&ntest_0);

    /* Unbind the socket.  */
    status = nx_tcp_client_socket_unbind(&client_socket);

    /* Check for error.  */
    if(status)
        error_counter++;

    /* Delete the socket.  */
    status = nx_tcp_socket_delete(&client_socket);

    /* Check for error.  */
    if(status)
        error_counter++;

    /* Determine if the test was successful.  */
    if((error_counter) || (seg_counter != 1) || (rst_counter != 1))
    {
        printf("ERROR!\n");
        test_control_return(1);
    }
    else
    {
        printf("SUCCESS!\n");
        test_control_return(0);
    }

}


static void    ntest_0_disconnect_received(NX_TCP_SOCKET *socket)
{

    /* Check for proper disconnected socket.  */
    if(socket != &server_socket)
        error_counter++;
}

static void           my_tcp_packet_receive_1_04(NX_IP *ip_ptr, NX_PACKET *packet_ptr)
{
    NX_TCP_HEADER    *tcp_header_ptr;

    if(server_socket.nx_tcp_socket_state == NX_TCP_CLOSED)
    {

        /* Point to the TCP HEADER.  */
        tcp_header_ptr = (NX_TCP_HEADER *)packet_ptr -> nx_packet_prepend_ptr;
        NX_CHANGE_ULONG_ENDIAN(tcp_header_ptr -> nx_tcp_header_word_3);

        /* Determined if it set the ACK BIT and RST BIT.  */
        if((!(tcp_header_ptr -> nx_tcp_header_word_3 & NX_TCP_ACK_BIT)) && (!(tcp_header_ptr -> nx_tcp_header_word_3 & NX_TCP_RST_BIT)))
        {
            /* The incoming segment is not containing RST and ACK flags.  */
            seg_counter = 1;

            /* Deal packets with default routing.  */
            ip_0.nx_ip_tcp_packet_receive = _nx_tcp_packet_receive;
        }
        NX_CHANGE_ULONG_ENDIAN(tcp_header_ptr -> nx_tcp_header_word_3);
    }

    /* Let server receive the packet.  */
    _nx_tcp_packet_receive(ip_ptr, packet_ptr); 
}

static void           my_tcp_packet_receive_1_04_2(NX_IP *ip_ptr, NX_PACKET *packet_ptr)
{
NX_TCP_HEADER    *tcp_header_ptr;

    if (seg_counter == 1)
    {
        /* Point to the TCP HEADER.  */
        tcp_header_ptr = (NX_TCP_HEADER *)packet_ptr -> nx_packet_prepend_ptr;
        NX_CHANGE_ULONG_ENDIAN(tcp_header_ptr -> nx_tcp_sequence_number);
        NX_CHANGE_ULONG_ENDIAN(tcp_header_ptr -> nx_tcp_header_word_3);

        /* Determined  the  RST BIT,ACK BIT,SEQ.  */
        if((tcp_header_ptr -> nx_tcp_header_word_3 & NX_TCP_RST_BIT) && (tcp_header_ptr -> nx_tcp_header_word_3 & NX_TCP_ACK_BIT) && (tcp_header_ptr -> nx_tcp_sequence_number == 0))
        {

            /* ACK_BIT and RST_BIT has been set and SEQ is zero.  */
            rst_counter++;

            /* Deal packets with default routing.  */
            ip_1.nx_ip_tcp_packet_receive = _nx_tcp_packet_receive;

        }
        else
            error_counter++;

        NX_CHANGE_ULONG_ENDIAN(tcp_header_ptr -> nx_tcp_sequence_number);
        NX_CHANGE_ULONG_ENDIAN(tcp_header_ptr -> nx_tcp_header_word_3);
    }

    /* Let client receive the packet.  */
    _nx_tcp_packet_receive(ip_ptr, packet_ptr); 
}
#else

#ifdef CTEST
VOID test_application_define(void *first_unused_memory)
#else
void    netx_1_04_application_define(void *first_unused_memory)
#endif
{

    /* Print out test information banner.  */
    printf("NetX Test:   TCP Spec 1.04 Test........................................N/A\n"); 

    test_control_return(3);  
}      
#endif