/* vxServer.c - Example code of UDP server. *//* Copyright 1984-1997 Wind River Systems, Inc. *//*modification history--------------------01d,06nov97,mm   added copyright.01c,26Sep97,mm   cast agr.1 of bzero01b,26Sep97,mm   added include <stdio.h> , <string.h> , <unistd.h>01a,09Feb94,ms   cleaned up for VxDemo.*/#include "vxWorks.h"#include <stdio.h>#include <string.h>#include <unistd.h>#include "socket.h"#include "in.h"#include "inetLib.h"#include "udpExample.h" /***************************************************************************** * myServer - Server reads from local socket and displays client's message.  * If requested, server sends a reply back to the client. Code executes on * VxWorks target and use VxWorks header files. * *  EXAMPLE: * *     To run this myServer task, from the VxWorks shell do as follows: *     -> sp (vxUdpServer) * *  RETURNS: OK or ERROR */ STATUS vxUdpServer()    {    struct sockaddr_in myAddr;		/* Server socket address */    struct sockaddr_in clientAddr;	/* Socket address for client */    struct request clientRequest;	/* Request/Message from client */    int sFd;				/* Server's socket file descriptor */    char inetAddr[INET_ADDR_LEN];	/* Buffer for dot notation *                        		 * internet addr of client */    /* Size of socket address structure */    int sockAddrSize = sizeof (struct sockaddr_in);    LOCAL char replyMsg[] = "Server received your message";    /* Build socket address */    bzero ((char *) &myAddr, sockAddrSize);    myAddr.sin_family = AF_INET;    myAddr.sin_port = htons (SERVER_PORT_NUM);    myAddr.sin_addr.s_addr = htonl (INADDR_ANY);    /* Create socket */    if ((sFd = socket (AF_INET, SOCK_DGRAM, 0)) == ERROR)        {	perror ("socket");	close (sFd);	return (ERROR);	}    /* Bind socket to local address */    if (bind (sFd, (struct sockaddr *) &myAddr, sockAddrSize)                                                        	== ERROR)        {        perror ("bind");	close (sFd);	return (ERROR);	}    FOREVER        {	/* Read data from a socket and satisfy requests */	if (recvfrom (sFd, &clientRequest, sizeof (clientRequest), 0,		      (struct sockaddr *) &clientAddr,&sockAddrSize) == ERROR)            {            perror ("recvfrom");            close (sFd);            return (ERROR);            }        /* Convert internet address to dot notation for displaying */	inet_ntoa_b (clientAddr.sin_addr, inetAddr);	printf ("MESSAGE FROM: Internet Address %s, port %d\n%s\n", 		inetAddr, ntohs (clientAddr.sin_port), clientRequest.message);	/* If client requested a reply, send acknowledgment */	if (clientRequest.reply)            if (sendto (sFd, replyMsg, sizeof (replyMsg), 0,                         (struct sockaddr *) &clientAddr,sockAddrSize) == ERROR)            {            perror ("sendto");            close (sFd);            return (ERROR);            }        }    close (sFd); /* Just in case. Should never get here. */    }