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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 */
/***************************************************************************/
/* 3.8 TCP, in LISTEN state, MUST send a RST after receiving a spurious SYN,ACK that potentially corresponds to an old SYN. */
#include "tx_api.h"
#include "nx_api.h"
#include "nx_tcp.h"
#if defined(__PRODUCT_NETXDUO__)
#include "nx_ipv4.h"
#include "nx_ipv6.h"
#else
#include "nx_ip.h"
#endif
#include "nx_packet.h"
#include "nx_ram_network_driver_test_1500.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 NX_PACKET_POOL pool_0;
static NX_IP ip_0;
static NX_TCP_SOCKET server_socket;
/* Define the counters used in the demo application... */
static ULONG error_counter;
static ULONG syn_ack_counter;
static ULONG rst_counter;
/* Define thread prototypes. */
static void ntest_0_entry(ULONG thread_input);
static void ntest_0_connect_received(NX_TCP_SOCKET *server_socket, UINT port);
static void ntest_0_disconnect_received(NX_TCP_SOCKET *server_socket);
extern USHORT _nx_ip_checksum_compute(NX_PACKET *, int, UINT, ULONG *, ULONG *);
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_3_08(NX_IP *ip_ptr, NX_PACKET *packet_ptr, UINT *operation_ptr, UINT *delay_ptr);
static void my_tcp_packet_receive_3_08(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_3_08_application_define(void *first_unused_memory)
#endif
{
CHAR *pointer;
UINT status;
/* Setup the working pointer. */
pointer = (CHAR *) first_unused_memory;
error_counter = 0;
syn_ack_counter = 0;
rst_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;
/* Initialize the NetX system. */
nx_system_initialize();
/* Create a packet pool. */
status = nx_packet_pool_create(&pool_0, "NetX Main Packet Pool", 512, 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;
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;
/* Check ARP enable status. */
if(status)
error_counter++;
/* Enable TCP processing for both IP instances. */
status = nx_tcp_enable(&ip_0);
/* 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;
NX_IP *ip_ptr;
NX_PACKET *packet_ptr;
NX_TCP_HEADER *tcp_header_ptr;
ULONG *option_word_1;
ULONG *option_word_2;
#if defined(__PRODUCT_NETXDUO__)
NX_IPV4_HEADER *ip_header_ptr;
ULONG val;
#else
NX_IP_HEADER *ip_header_ptr;
#endif
ULONG checksum;
ULONG source;
ULONG dest;
#if defined(__PRODUCT_NETXDUO__)
ULONG *source_ip, *dest_ip;
#else
ULONG source_ip, dest_ip;
ULONG temp;
#endif
/* Print out some test information banners. */
printf("NetX Test: TCP Spec 3.08 Test........................................");
/* Check for earlier error. */
if(error_counter)
{
printf("ERROR!\n");
test_control_return(1);
}
/* Create a static ARP entry. */
status = nx_arp_static_entry_create(&ip_0, IP_ADDRESS(1, 2, 3, 5), 0x00112233, 0x4456);
if(status)
error_counter++;
/* 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 for error. */
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, 100,
NX_NULL, ntest_0_disconnect_received);
/* Check for error. */
if(status)
error_counter++;
/* Setup this thread to listen. */
status = nx_tcp_server_socket_listen(&ip_0, 12, &server_socket, 5, ntest_0_connect_received);
/* Check for error. */
if(status)
error_counter++;
if(server_socket.nx_tcp_socket_state != NX_TCP_LISTEN_STATE)
error_counter++;
ip_ptr = server_socket.nx_tcp_socket_ip_ptr;
status = nx_packet_allocate(&pool_0, &packet_ptr, NX_IP_PACKET, NX_IP_PERIODIC_RATE);
/* Check for error. */
if(status)
error_counter++;
#ifdef __PRODUCT_NETXDUO__
packet_ptr -> nx_packet_append_ptr = packet_ptr -> nx_packet_prepend_ptr + NX_TCP_SYN_SIZE;
packet_ptr -> nx_packet_length = NX_TCP_SYN_SIZE;
#else
packet_ptr -> nx_packet_append_ptr = packet_ptr -> nx_packet_prepend_ptr + sizeof(NX_TCP_SYN);
packet_ptr -> nx_packet_length = sizeof(NX_TCP_SYN);
#endif
tcp_header_ptr = (NX_TCP_HEADER *)packet_ptr -> nx_packet_prepend_ptr;
option_word_1 = (ULONG *)(tcp_header_ptr + 1);
option_word_2 = option_word_1 + 1;
/*Build TCP header. */
tcp_header_ptr -> nx_tcp_header_word_0 = (ULONG) server_socket.nx_tcp_socket_port;
tcp_header_ptr -> nx_tcp_sequence_number = 1000;
tcp_header_ptr -> nx_tcp_acknowledgment_number = 0;
tcp_header_ptr -> nx_tcp_header_word_3 = NX_TCP_SYN_HEADER | NX_TCP_SYN_BIT | NX_TCP_ACK_BIT | (server_socket.nx_tcp_socket_rx_window_current);
tcp_header_ptr -> nx_tcp_header_word_4 = 0;
*option_word_1 = NX_TCP_MSS_OPTION;
*option_word_2 = NX_TCP_OPTION_END;
NX_CHANGE_ULONG_ENDIAN(tcp_header_ptr -> nx_tcp_header_word_0);
NX_CHANGE_ULONG_ENDIAN(tcp_header_ptr -> nx_tcp_sequence_number);
NX_CHANGE_ULONG_ENDIAN(tcp_header_ptr -> nx_tcp_acknowledgment_number);
NX_CHANGE_ULONG_ENDIAN(tcp_header_ptr -> nx_tcp_header_word_3);
NX_CHANGE_ULONG_ENDIAN(tcp_header_ptr -> nx_tcp_header_word_4);
NX_CHANGE_ULONG_ENDIAN(*option_word_1);
NX_CHANGE_ULONG_ENDIAN(*option_word_2);
source = 0x01020305;
dest = 0x01020304;
#if defined(__PRODUCT_NETXDUO__)
dest_ip = &dest;
source_ip = &source;
checksum = _nx_ip_checksum_compute(packet_ptr, NX_PROTOCOL_TCP,
packet_ptr -> nx_packet_length,
source_ip, dest_ip);
checksum = ~checksum & NX_LOWER_16_MASK;
#elif defined(__PRODUCT_NETX__)
dest_ip = dest;
source_ip = source;
checksum = _nx_tcp_checksum(packet_ptr, source_ip, dest_ip);
#endif
NX_CHANGE_ULONG_ENDIAN(tcp_header_ptr -> nx_tcp_header_word_4);
tcp_header_ptr -> nx_tcp_header_word_4 = (checksum << NX_SHIFT_BY_16);
NX_CHANGE_ULONG_ENDIAN(tcp_header_ptr -> nx_tcp_header_word_4);
#if defined(__PRODUCT_NETXDUO__)
packet_ptr -> nx_packet_prepend_ptr = packet_ptr -> nx_packet_prepend_ptr - sizeof(NX_IPV4_HEADER);
packet_ptr -> nx_packet_length = packet_ptr -> nx_packet_length + sizeof(NX_IPV4_HEADER);
#elif defined(__PRODUCT_NETX__)
packet_ptr -> nx_packet_prepend_ptr = packet_ptr -> nx_packet_prepend_ptr - sizeof(NX_IP_HEADER);
packet_ptr -> nx_packet_length = packet_ptr -> nx_packet_length + sizeof(NX_IP_HEADER);
#endif
#if defined(__PRODUCT_NETXDUO__)
ip_header_ptr = (NX_IPV4_HEADER *) packet_ptr -> nx_packet_prepend_ptr;
#elif defined(__PRODUCT_NETX__)
ip_header_ptr = (NX_IP_HEADER *) packet_ptr -> nx_packet_prepend_ptr;
#endif
/*Build IP header. */
ip_header_ptr -> nx_ip_header_word_0 = (NX_IP_VERSION | (0xFFFF & packet_ptr -> nx_packet_length));
#ifdef NX_ENABLE_IP_ID_RANDOMIZATION
ip_header_ptr -> nx_ip_header_word_1 = (((ULONG)NX_RAND()) << NX_SHIFT_BY_16);
#else
ip_header_ptr -> nx_ip_header_word_1 = (ip_ptr -> nx_ip_packet_id++ << NX_SHIFT_BY_16);
#endif /* NX_ENABLE_IP_ID_RANDOMIZATION */
ip_header_ptr -> nx_ip_header_word_2 = ((server_socket.nx_tcp_socket_time_to_live << NX_IP_TIME_TO_LIVE_SHIFT) | NX_IP_TCP);
ip_header_ptr -> nx_ip_header_source_ip = 0x01020305;
ip_header_ptr -> nx_ip_header_destination_ip = 0x01020304;
#ifdef __PRODUCT_NETX__
/* Build the IP header checksum. */
temp = ip_header_ptr -> nx_ip_header_word_0;
checksum = (temp >> NX_SHIFT_BY_16) + (temp & NX_LOWER_16_MASK);
temp = ip_header_ptr -> nx_ip_header_word_1;
checksum += (temp >> NX_SHIFT_BY_16) + (temp & NX_LOWER_16_MASK);
temp = ip_header_ptr -> nx_ip_header_word_2;
checksum += (temp >> NX_SHIFT_BY_16);
temp = ip_header_ptr -> nx_ip_header_source_ip;
checksum += (temp >> NX_SHIFT_BY_16) + (temp & NX_LOWER_16_MASK);
temp = ip_header_ptr -> nx_ip_header_destination_ip;
checksum += (temp >> NX_SHIFT_BY_16) + (temp & NX_LOWER_16_MASK);
/* Add in the carry bits into the checksum. */
checksum = (checksum >> NX_SHIFT_BY_16) + (checksum & NX_LOWER_16_MASK);
/* Do it again in case previous operation generates an overflow. */
checksum = (checksum >> NX_SHIFT_BY_16) + (checksum & NX_LOWER_16_MASK);
/* Now store the checksum in the IP header. */
ip_header_ptr -> nx_ip_header_word_2 = ip_header_ptr -> nx_ip_header_word_2 | (NX_LOWER_16_MASK & (~checksum));
#endif
NX_CHANGE_ULONG_ENDIAN(ip_header_ptr -> nx_ip_header_word_0);
NX_CHANGE_ULONG_ENDIAN(ip_header_ptr -> nx_ip_header_word_1);
NX_CHANGE_ULONG_ENDIAN(ip_header_ptr -> nx_ip_header_word_2);
NX_CHANGE_ULONG_ENDIAN(ip_header_ptr -> nx_ip_header_source_ip);
NX_CHANGE_ULONG_ENDIAN(ip_header_ptr -> nx_ip_header_destination_ip);
#ifdef __PRODUCT_NETXDUO__
checksum = _nx_ip_checksum_compute(packet_ptr, NX_IP_VERSION_V4, 20, NULL, NULL);
val = (ULONG)(~checksum);
val = val & NX_LOWER_16_MASK;
/* Convert to network byte order. */
NX_CHANGE_ULONG_ENDIAN(val);
/* Now store the checksum in the IP header. */
ip_header_ptr -> nx_ip_header_word_2 = ip_header_ptr -> nx_ip_header_word_2 | val;
#endif
advanced_packet_process_callback = my_packet_process_3_08;
ip_0.nx_ip_tcp_packet_receive = my_tcp_packet_receive_3_08;
_nx_ip_packet_deferred_receive(ip_ptr, packet_ptr);
/* Unlisten on the server port. */
status = nx_tcp_server_socket_unlisten(&ip_0, 12);
/* Check for error. */
if(status)
error_counter++;
/* Delete the socket. */
status = nx_tcp_socket_delete(&server_socket);
/* Check for error. */
if(status)
error_counter++;
/* Determine if the test was successful. */
if((error_counter) || (syn_ack_counter != 1) || (rst_counter != 1))
{
printf("ERROR!\n");
test_control_return(1);
}
else
{
printf("SUCCESS!\n");
test_control_return(0);
}
}
static void ntest_0_connect_received(NX_TCP_SOCKET *socket_ptr, UINT port)
{
/* Check for the proper socket and port. */
if((socket_ptr != &server_socket) || (port != 12))
error_counter++;
}
static void ntest_0_disconnect_received(NX_TCP_SOCKET *socket)
{
/* Check for proper disconnected socket. */
if(socket != &server_socket)
error_counter++;
}
static UINT my_packet_process_3_08(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(tcp_header_ptr -> nx_tcp_header_word_3 & NX_TCP_RST_BIT)
{
rst_counter++;
/* RST packet has been processed. */
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_3_08(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);
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_ack_counter++;
NX_CHANGE_ULONG_ENDIAN(tcp_header_ptr -> nx_tcp_header_word_3);
/* Deal packets with default routing. */
ip_0.nx_ip_tcp_packet_receive = _nx_tcp_packet_receive;
/* Let server 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_3_08_application_define(void *first_unused_memory)
#endif
{
/* Print out test information banner. */
printf("NetX Test: TCP Spec 3.08 Test........................................N/A\n");
test_control_return(3);
}
#endif
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