TCP/IP Programming Manual

/* Convert the server's 32-bit IPv4 address to a dot-formatted
Internet address text string. A call to inet_ntoa expects an
IPv4 address as input. */
ap = inet_ntoa(serveraddr.sin_addr);
printf("Response received from");
if (hp != NULL)
printf(" %s", hp->h_name);
if (ap != NULL)
printf(" (%s)", ap);
printf(":\n %s\n", databuf);
FILE_CLOSE_((short)s);
}
AF_INET Server Stub Routine
The next example shows a sample server program that you can build, compile, and run on your
system. The program receives requests from and sends responses to client programs on other
systems.
/*
* AF_INET Server Stub Routine
* *****************************************************************
* * *
* * Copyright (c) Hewlett-Packard Company, 2003 *
* * *
* * The software contained on this media is proprietary to *
* * and embodies the confidential technology of Hewlett *
* * Packard Corporation. Possession, use, duplication or *
* * dissemination of the software and media is authorized only *
* * pursuant to a valid written license from Hewlett Packard *
* * Corporation. *
* * *
* * RESTRICTED RIGHTS LEGEND Use, duplication, or disclosure *
* * by the U.S. Government is subject to restrictions as set *
* * forth in Subparagraph (c)(1)(ii) of DFARS 252.227-7013, *
* * or in FAR 52.227-19, as applicable. *
* * *
* *****************************************************************
*/
#include <systype.h>
#include <socket.h>
#include <errno.h>
#include <in.h>
#include <netdb.h>
#include <string.h>
#include <stdio.h>
#include <signal.h>
#include <stdlib.h>
#include <inet.h>
#include <cextdecs(FILE_CLOSE_)>
#define SERVER_PORT 7639
#define CLIENT_PORT 7739
#define MAXBUFSIZE 4096
int main (
int argc,
char **argv )
{
int s;
char databuf[MAXBUFSIZE];
210 Sample Programs