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