server.c

vxworks下的一个网络通信的例子

#include "vxWorks.h"
#include "fioLib.h"
#include "stdio.h"
#include "unistd.h"
#include "string.h"
#include "usrLib.h"
#include "errnoLib.h"
#include "hostLib.h"
#include "sockLib.h"
#include "socket.h"
#include "inetLib.h"
#include "in.h"
#include "assert.h"

#define SERVER_NUM 1100
int server (void)
    {
    int sock, newsock;	/* socket fd's */
    struct sockaddr_in	serverAddr;	/* server's address */
    struct sockaddr_in 	clientAddr;	/* client's address */
    int			client_len;	/* length of clientAddr */
    char		buffer[30];
    char    sendstring[]="server send reciver ack!";
    extern int		errno;		/* for UNIX error referencing */

    /* Zero out the sock_addr structures.
     * This MUST be done before the socket calls.
     */

    bzero ((char *)&serverAddr, sizeof (serverAddr));
    bzero ((char *)&clientAddr, sizeof (clientAddr));

    /* Open the socket.
     * Use ARPA Internet address format and stream sockets.
     * Format described in "socket.h".
     */

    if(sock = socket (AF_INET, SOCK_STREAM, 0)<0)
    	{
    		printf ("socket create failed, errno = %d\n", errno);
    	}


    /* Set up our internet address, and bind it so the client can connect. */

    serverAddr.sin_family = AF_INET;
    serverAddr.sin_port = htons(SERVER_NUM);
    serverAddr.sin_addr.s_addr=htons(INADDR_ANY);

    printf ("\nBinding SERVER\n", serverAddr.sin_port);

    if (bind (sock, (struct sockaddr *)&serverAddr, sizeof (serverAddr))
							== ERROR)
	{
	printf ("bind failed, errno = %d\n", errno);
	close (sock);
	exit (1);
	}

    /* Listen, for the client to connect to us. */

    printf ("Listening to client\n");
	
    if (listen (sock, 2) == ERROR)
	{
	printf ("listen failed\n");
	close (sock);
	exit (1);
	}

    /* The client has connected.  Accept, and receive chars */

    printf ("Accepting CLIENT\n");

    client_len = sizeof (clientAddr);

    newsock = accept (sock, (struct sockaddr *)&clientAddr, &client_len);

    if (newsock == ERROR)
	{
	printf ("accept failed\n");
	close (sock);
	exit (1);
	}
    printf ("CLIENT: port = %d: family = %d: addr = %lx:\n",ntohs(clientAddr.sin_port), clientAddr.sin_family,ntohl(clientAddr.sin_addr.s_addr));

    /* repeatedly recieve characters from client and put on stdout */

    while(1)
	{
	if (recv(newsock, buffer,sizeof(buffer), 0) == ERROR)
	    {
	    /* client has disappeared */
	    break;
	    }
	printf("from client:%s\n",buffer);

	if (send(newsock, sendstring,strlen(sendstring), 0) == ERROR)
	    {
	    /* client has disappeared */
	    break;
	    }
	}

    /* close the socket from the UNIX side */

    close (sock);
    close (newsock);

    printf ("\n...goodbye\n");
	return 1;
    }