/***************************************************************************/ /* 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 */ /***************************************************************************/ /* 14.19 TCP MUST include an SWS avoidance algorithm in the receiver when effective send MSS < (1/ 2)*RCV_BUFF. */ /* Procedure 1.Connection successfully 2.First Client sends 40 data to Server, then check if the last_sent changed 3.Then Client sends more 20 data to Server, also check if the last_sent changed 4.If the last_sent changed, the SWS avoidance algorithm has not been used. */ #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 MSG "----------abcdefgh20----------ABCDEFGH40----------klmnopqr60----------KLMNOPQR80--------------------" /* 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 data_packet_counter; static UINT is_included; static ULONG mss_option; /* Define thread prototypes. */ static void ntest_0_entry(ULONG thread_input); static void ntest_1_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 void _nx_ram_network_driver(struct NX_IP_DRIVER_STRUCT *driver_req); /* Define what the initial system looks like. */ #ifdef CTEST VOID test_application_define(void *first_unused_memory) #else void netx_14_19_application_define(void *first_unused_memory) #endif { CHAR *pointer; UINT status; /* Setup the working pointer. */ pointer = (CHAR *) first_unused_memory; error_counter = 0; data_packet_counter = 0; is_included = NX_FALSE; mss_option = 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", 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, 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, 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; /* Enable ARP and supply ARP cache memory for IP Instance 1. */ status += nx_arp_enable(&ip_1, (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); 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; NX_PACKET *rcv_packet_ptr; ULONG window_last_sent; ULONG rcv_length; /* Print out test information banner. */ printf("NetX Test: TCP Spec 14.19 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 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, 200, 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++; /* Accept a client socket connection. */ status = nx_tcp_server_socket_accept(&server_socket, NX_IP_PERIODIC_RATE); /* Check for error. */ if(status) error_counter++; tx_thread_suspend(&ntest_0); window_last_sent = server_socket.nx_tcp_socket_rx_window_last_sent; status = nx_tcp_socket_receive(&server_socket, &rcv_packet_ptr, 2 * NX_IP_PERIODIC_RATE); /* Check for error. */ if(status) error_counter++; else { /* Check data length and payload */ if((rcv_packet_ptr -> nx_packet_length == mss_option - 20) && (!memcmp(rcv_packet_ptr -> nx_packet_prepend_ptr, MSG, mss_option - 20))) data_packet_counter++; rcv_length = rcv_packet_ptr -> nx_packet_length; /* Release the packet. */ nx_packet_release(rcv_packet_ptr); } /* Check whether the premise 'effective send MSS < (1/ 2)*RCV_BUFF' is satisfied. */ if((data_packet_counter == 1) && (rcv_length <= server_socket.nx_tcp_socket_connect_mss) && (server_socket.nx_tcp_socket_connect_mss < (0.5 * server_socket.nx_tcp_socket_rx_window_default))) if(window_last_sent == server_socket.nx_tcp_socket_rx_window_last_sent) is_included = NX_TRUE; /* Disconnect the server socket. */ status = nx_tcp_socket_disconnect(&server_socket, NX_IP_PERIODIC_RATE); /* Check for error. */ if(status) error_counter++; /* Unaccepted the server socket. */ status = nx_tcp_server_socket_unaccept(&server_socket); /* Check for error. */ if(status) error_counter++; /* 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++; } static void ntest_1_entry(ULONG thread_input) { UINT status; NX_PACKET *my_packet; char *msg = MSG; /* 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, 200, 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++; status = nx_tcp_client_socket_connect(&client_socket, IP_ADDRESS(1, 2, 3, 4), 12, 5 * NX_IP_PERIODIC_RATE); if(status) error_counter++; mss_option = client_socket.nx_tcp_socket_connect_mss; status = nx_packet_allocate(&pool_0, &my_packet, NX_TCP_PACKET, NX_IP_PERIODIC_RATE); /* Check for error. */ if(status) error_counter++; status = nx_packet_data_append(my_packet, msg, mss_option - 20, &pool_0, NX_IP_PERIODIC_RATE); /* Check for error. */ if(status) error_counter++; /* Send the my_packet0 */ status = nx_tcp_socket_send(&client_socket, my_packet, 2 * NX_IP_PERIODIC_RATE); /* Check for error. */ if(status) error_counter++; tx_thread_resume(&ntest_0); /* Disconnect this socket. */ status = nx_tcp_socket_disconnect(&client_socket, NX_IP_PERIODIC_RATE); /* Check for error. */ if(status) error_counter++; /* 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 || (data_packet_counter != 1) || (is_included != NX_TRUE)) { 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++; } #else #ifdef CTEST VOID test_application_define(void *first_unused_memory) #else void netx_14_19_application_define(void *first_unused_memory) #endif { /* Print out test information banner. */ printf("NetX Test: TCP Spec 14.19 Test.......................................N/A\n"); test_control_return(3); } #endif