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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 */
/***************************************************************************/
/* This is a small demo of the high-performance NetX TCP/IP stack. This demo concentrates
on UDP packet sending and receiving - with ARP - using a simulated Ethernet driver. */
/* This demo works for IPv4 only */
#include "tx_api.h"
#include "nx_api.h"
#ifndef NX_DISABLE_IPV4
#include "nxd_bsd.h"
#include <string.h>
#include <stdlib.h>
#define DEMO_STACK_SIZE 2048
#define SERVER_PORT 721
/* Message sent to the server */
#define CLIENT_MESSAGE "Client BSD UDP Socket testing\n"
/* Define the ThreadX and NetX object control blocks... */
TX_THREAD thread_server;
TX_THREAD thread_client;
NX_PACKET_POOL bsd_pool;
NX_IP bsd_ip;
/* Define the counters used in the demo application... */
ULONG thread_0_counter;
ULONG thread_2_counter;
ULONG error_counter;
/* Define thread prototypes. */
VOID thread_server_entry(ULONG thread_input);
VOID thread_client_entry(ULONG thread_input);
VOID _nx_ram_network_driver(struct NX_IP_DRIVER_STRUCT *driver_req);
/* Define main entry point. */
int main()
{
/* Enter the ThreadX kernel. */
tx_kernel_enter();
}
/* Define what the initial system looks like. */
void tx_application_define(void *first_unused_memory)
{
CHAR *pointer;
UINT status;
/* Setup the working pointer. */
pointer = (CHAR *) first_unused_memory;
/* Create a thread for the Server */
tx_thread_create(&thread_server, "Server", thread_server_entry, 0,
pointer, DEMO_STACK_SIZE,
8, 8, TX_NO_TIME_SLICE, TX_AUTO_START);
pointer = pointer + DEMO_STACK_SIZE;
/* Create a thread for client. */
tx_thread_create(&thread_client, "Client", thread_client_entry, 0,
pointer, DEMO_STACK_SIZE,
16, 16, TX_NO_TIME_SLICE, TX_AUTO_START);
pointer = pointer + DEMO_STACK_SIZE;
/* Initialize the NetX system. */
nx_system_initialize();
/* Create a BSD packet pool. */
status = nx_packet_pool_create(&bsd_pool, "NetX BSD Packet Pool", 128, pointer, 16384);
pointer = pointer + 16384;
if (status)
{
error_counter++;
printf("Error in creating BSD packet pool\n!");
}
/* Create an IP instance for BSD. */
status += nx_ip_create(&bsd_ip, "NetX IP Instance 2", IP_ADDRESS(1, 2, 3, 4), 0xFFFFFF00UL,
&bsd_pool, _nx_ram_network_driver,
pointer, DEMO_STACK_SIZE, 1);
pointer = pointer + DEMO_STACK_SIZE;
/* Check for any errors */
if (status)
error_counter++;
if (status)
printf("Error creating BSD IP instance\n!");
/* Enable ARP and supply ARP cache memory for BSD IP Instance */
status += nx_arp_enable(&bsd_ip, (void *) pointer, 1024);
pointer = pointer + 1024;
/* Check ARP enable status. */
if (status)
error_counter++;
if (status)
printf("Error in Enable ARP and supply ARP cache memory to BSD IP instance\n");
/* Enable UDP traffic. */
status = nx_udp_enable(&bsd_ip);
/* Check for UDP enable errors. */
if (status)
error_counter++;
/* Now initialize BSD Socket Wrapper */
status = (UINT)bsd_initialize (&bsd_ip, &bsd_pool, pointer, 2048, 2);
if (status)
error_counter++;
}
void thread_server_entry(ULONG thread_input)
{
/* Start the Server */
INT status,addrlen1;
INT sock_udp_2;
struct sockaddr_in echoServAddr; /* Echo server address */
struct sockaddr_in fromAddr; /* Cleint address */
CHAR buffer[64];
NX_PARAMETER_NOT_USED(thread_input);
/* Create a BSD UDP Server Socket */
sock_udp_2 = socket(PF_INET, SOCK_DGRAM, IPPROTO_UDP);
/* Check for any errors */
if (sock_udp_2 == -1)
{
printf("Error: BSD UDP Servert socket create\n");
return;
}
/* Fill ths socket with Server side information */
memset(&echoServAddr, 0, sizeof(echoServAddr));
echoServAddr.sin_family = PF_INET;
echoServAddr.sin_addr.s_addr = htonl(IP_ADDRESS(1,2,3,4));
echoServAddr.sin_port = htons(SERVER_PORT);
/* Bind the UDP socket to the IP port. */
status = bind (sock_udp_2, (struct sockaddr *) &echoServAddr, sizeof(echoServAddr));
if (status < 0)
{
printf("Error: BSD UDP Server Socket Bind\n");
return;
}
while(1)
{
addrlen1 = sizeof(struct sockaddr_in);
/* Receive a UDP packet from a client. */
status = recvfrom(sock_udp_2,(VOID *)buffer, 64, 0,(struct sockaddr *) &fromAddr, &addrlen1);
/* Check for any errors */
if (status == ERROR)
printf("Error: BSD Server Socket receive\n");
else
{
/* Print client information */
printf("Server received data from Client at IP address 0x%x at port %lu\n",
(UINT)fromAddr.sin_addr.s_addr, (ULONG)fromAddr.sin_port);
/* Print the packet received from the client */
printf("Server received from Client: %s\n", buffer);
/* Now echo the recieved data string to the same client */
status = sendto(sock_udp_2, buffer, (INT)(status + 1), 0, (struct sockaddr *) &fromAddr, sizeof(fromAddr));
/* Check for any errors */
if (status == ERROR)
printf("Error:BSD Server Socket echo\n");
}
tx_thread_sleep(NX_IP_PERIODIC_RATE);
/* All done , loop back to recieve next packet */
}
}
/* Define the Client thread. */
void thread_client_entry(ULONG thread_input)
{
INT status,sock_udp_1;
INT addrlen;
struct sockaddr_in destAddr; /* Destination address */
struct sockaddr_in ClientAddr; /* Client address */
struct sockaddr_in fromAddr; /* Cleint address */
CHAR echomsg[64]; /* Message echoed by the server */
NX_PARAMETER_NOT_USED(thread_input);
/* Allow Server side to set up */
tx_thread_sleep(10);
thread_2_counter =0;
while(1)
{
/* Create a BSD UDP Client Socket */
sock_udp_1 = socket( PF_INET, SOCK_DGRAM, IPPROTO_UDP);
/* Check for any errors */
if (sock_udp_1 == ERROR)
{
printf("Error: BSD UDP Client socket create\n");
return;
}
/* Set up client side */
memset(&ClientAddr, 0, sizeof(ClientAddr));
ClientAddr.sin_family = PF_INET;
ClientAddr.sin_addr.s_addr = htonl(IP_ADDRESS(1,2,3,4));
/* Assign a known Server port */
memset(&destAddr, 0, sizeof(destAddr));
destAddr.sin_addr.s_addr = htonl(IP_ADDRESS(1,2,3,4));
destAddr.sin_port = htons(SERVER_PORT);
destAddr.sin_family = PF_INET;
/* Client socket is ready now start sending packets */
printf("BSD Client Socket (%lu) sending test message: %s\n", (ULONG)sock_udp_1, CLIENT_MESSAGE);
status = sendto(sock_udp_1, CLIENT_MESSAGE, (INT)(sizeof(CLIENT_MESSAGE)), 0,
(struct sockaddr *) &destAddr, sizeof(destAddr));
/* Check for any errors */
if (status == ERROR)
{
printf("Error: BSD Client Socket send\n");
}
else
{
addrlen = sizeof(struct sockaddr_in);
/* Try to receive an echo from the server. */
status = recvfrom(sock_udp_1,(VOID *)echomsg,64, 0, (struct sockaddr *) &fromAddr, &addrlen);
/* * Check for any errors */
if (status == ERROR)
{
printf("Error: BSD Client Socket echo receive\n");
}
else
{
/* Print Server detials */
printf("Client contacted Server at IP address 0x%x and port %lu\n",
(UINT)fromAddr.sin_addr.s_addr, (ULONG)fromAddr.sin_port);
/* Print the received echo string from the server */
printf("Client (%lu) received echo string: %s\n", (ULONG)sock_udp_1, echomsg);
}
}
/* Done with this client socket */
status = soc_close(sock_udp_1);
/* Check for any errors */
if (status == ERROR)
{
printf("Error: BSD Client Socket close\n");
}
/* Increment client transaction counter. */
thread_2_counter++;
tx_thread_sleep(NX_IP_PERIODIC_RATE);
}
}
#endif /* NX_DISABLE_IPV4 */
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