/***************************************************************************/
/* 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                                            */
/***************************************************************************/

/* 11.18 TCP, if starts as an active connection and reaches SYN-RCVD state MUST go to CLOSED state on RESET.  */

/* Procedure
1. Client_1 sends a SYN to Client_2.
2. Use my_packet_process_11_18 function to drop the SYN packet.
3. Client_2 sends a SYN to Client_1.
4. Client_1 sends a SYN+ACK to Client_2.
5. Use my_packet_process_11_18 function to drop the SYN+ACK packet.
6. Client_2 sends a RST to Client_1.
7. Check the Client_1 state.  */

#include   "tx_api.h"
#include   "nx_api.h"
#include   "nx_tcp.h"
#include   "nx_ram_network_driver_test_1500.h"

extern void    test_control_return(UINT status);

#if defined(NX_DISABLE_RESET_DISCONNECT) && !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_1_socket;
static NX_TCP_SOCKET           client_2_socket;

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

static ULONG                   error_counter;
static ULONG                   syn_counter;
static ULONG                   rst_counter;

/* Define thread prototypes.  */

static void    ntest_0_entry(ULONG thread_input);
static void    ntest_1_entry(ULONG thread_input);
extern void    _nx_ram_network_driver(struct NX_IP_DRIVER_STRUCT *driver_req);
extern void    _nx_ram_network_driver_1500(struct NX_IP_DRIVER_STRUCT *driver_req);
extern UINT    (*advanced_packet_process_callback)(NX_IP *ip_ptr, NX_PACKET *packet_ptr, UINT *operation_ptr, UINT *delay_ptr);
static UINT    my_packet_process_11_18(NX_IP *ip_ptr, NX_PACKET *packet_ptr, UINT *operation_ptr, UINT *delay_ptr);
static void    my_tcp_packet_receive_11_18(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_11_18_application_define(void *first_unused_memory)
#endif
{
CHAR       *pointer;
UINT       status;

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

    error_counter = 0;
    syn_counter = 0;
    rst_counter = 0;

    /* Create the main thread.  */
    tx_thread_create(&ntest_0, "thread 0", ntest_0_entry, 0,  
                     pointer, DEMO_STACK_SIZE, 
                     4, 4, 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_1500,
                          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;

    /* Print out test information banner.  */
    printf("NetX Test:   TCP Spec 11.18 Test.......................................");

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

    /* Create a socket.  */
    status = nx_tcp_socket_create(&ip_0, &client_1_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_1_socket, 12, NX_IP_PERIODIC_RATE);

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

    /* Deal the SYN packet with my routing  */
    advanced_packet_process_callback = my_packet_process_11_18;
    ip_0.nx_ip_tcp_packet_receive = my_tcp_packet_receive_11_18;

    /* Call connect to send a SYN  */ 
    status = nx_tcp_client_socket_connect(&client_1_socket, IP_ADDRESS(1, 2, 3, 5), 12, NX_IP_PERIODIC_RATE);

    /* Check the Client_1's state.  */
    if((rst_counter != 1) || (client_1_socket.nx_tcp_socket_state != NX_TCP_CLOSED))
        error_counter++;

    /* Unbind the socket.  */
    status = nx_tcp_client_socket_unbind(&client_1_socket);

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

    /* Delete the socket.  */
    status = nx_tcp_socket_delete(&client_1_socket);

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

static void    ntest_1_entry(ULONG thread_input)
{
UINT            status;
ULONG           actual_status;
NX_TCP_HEADER   header_ptr;


    /* Ensure the IP instance has been initialized.  */
    status = nx_ip_status_check(&ip_1, NX_IP_INITIALIZE_DONE, &actual_status, NX_IP_PERIODIC_RATE);

    /* Check status...  */
    if(status)
    {
        printf("ERROR!\n");
        test_control_return(1);
    }

    /* Create a socket.  */
    status = nx_tcp_socket_create(&ip_1, &client_2_socket, "Client Socket", 
                                  NX_IP_NORMAL, NX_FRAGMENT_OKAY, NX_IP_TIME_TO_LIVE, 200,
                                  NX_NULL, NX_NULL);

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

    status = nx_tcp_client_socket_bind(&client_2_socket, 12, NX_IP_PERIODIC_RATE);

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

    /* Call connect to send a SYN  */ 
    status = nx_tcp_client_socket_connect(&client_2_socket, IP_ADDRESS(1, 2, 3, 4), 12, NX_NO_WAIT);

    /* Send RST.  */
    header_ptr.nx_tcp_header_word_3 = header_ptr.nx_tcp_header_word_3 | NX_TCP_ACK_BIT | NX_TCP_RST_BIT;
    header_ptr.nx_tcp_acknowledgment_number = client_1_socket.nx_tcp_socket_rx_sequence;
    header_ptr.nx_tcp_sequence_number       = client_1_socket.nx_tcp_socket_tx_sequence + 1;

    _nx_tcp_packet_send_rst(&client_2_socket, &header_ptr);

    tx_thread_sleep(NX_IP_PERIODIC_RATE/20);

    /* Disconnect the socket.  */
    status = nx_tcp_socket_disconnect(&client_2_socket, NX_NO_WAIT);

    status = nx_tcp_client_socket_unbind(&client_2_socket);

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

    /* Delete the socket.  */
    status = nx_tcp_socket_delete(&client_2_socket);

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

    /* Determine if the test was successful.  */
    if((error_counter) || (syn_counter != 2 ) || (rst_counter != 1))
    {
        printf("ERROR!\n");
        test_control_return(1);
    }
    else
    {
        printf("SUCCESS!\n");
        test_control_return(0);
    }
}

static UINT    my_packet_process_11_18(NX_IP *ip_ptr, NX_PACKET *packet_ptr, UINT *operation_ptr, UINT *delay_ptr)
{
NX_TCP_HEADER   *tcp_header_ptr;

    tcp_header_ptr = (NX_TCP_HEADER*)((packet_ptr -> nx_packet_prepend_ptr) + 20);
    NX_CHANGE_ULONG_ENDIAN(tcp_header_ptr -> nx_tcp_header_word_3);

    /* If this is a tcp packet but not an ARP packet or other kind packet. */
    if(packet_ptr -> nx_packet_length >= 40)
    {
        /* Check if it is a SYN packet.  */
        if((tcp_header_ptr -> nx_tcp_header_word_3 & NX_TCP_SYN_BIT) && !(tcp_header_ptr -> nx_tcp_header_word_3 & NX_TCP_ACK_BIT) && (syn_counter == 0))
        {
            syn_counter++;

            /*Drop the packet*/
            *operation_ptr = NX_RAMDRIVER_OP_DROP;
        }
        /* Check if it is a SYN+ACK packet.  */
        else if((tcp_header_ptr -> nx_tcp_header_word_3 & NX_TCP_SYN_BIT) && (tcp_header_ptr -> nx_tcp_header_word_3 & NX_TCP_ACK_BIT) && (syn_counter == 2))
        {
            /*Drop the packet*/
            *operation_ptr = NX_RAMDRIVER_OP_DROP;

            advanced_packet_process_callback = NX_NULL;
        }
    }
    NX_CHANGE_ULONG_ENDIAN(tcp_header_ptr -> nx_tcp_header_word_3);

    return NX_TRUE;
}

static void    my_tcp_packet_receive_11_18(NX_IP *ip_ptr, NX_PACKET *packet_ptr)
{
NX_TCP_HEADER   *tcp_header_ptr;

    tcp_header_ptr = (NX_TCP_HEADER *)packet_ptr -> nx_packet_prepend_ptr;
    NX_CHANGE_ULONG_ENDIAN(tcp_header_ptr -> nx_tcp_header_word_3);

    /* Check the packet is a SYN one.  */
    if((tcp_header_ptr -> nx_tcp_header_word_3 & NX_TCP_SYN_BIT) && !(tcp_header_ptr -> nx_tcp_header_word_3 & NX_TCP_ACK_BIT) && (syn_counter == 1))
        syn_counter++;
    else if(client_1_socket.nx_tcp_socket_state == NX_TCP_SYN_RECEIVED)
    {
        /* Check the packet is a RST one.  */
        if(tcp_header_ptr -> nx_tcp_header_word_3 & NX_TCP_RST_BIT)
        {
            rst_counter++;

            /* 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 client1 receives the packet.  */
    _nx_tcp_packet_receive(ip_ptr, packet_ptr); 
}

#else

#ifdef CTEST
VOID test_application_define(void *first_unused_memory)
#else
void    netx_11_18_application_define(void *first_unused_memory)
#endif
{

    /* Print out test information banner.  */
    printf("NetX Test:   TCP Spec 11.18 Test.......................................N/A\n");
    test_control_return(3);

}
#endif