178 lines
9.2 KiB
HTML
178 lines
9.2 KiB
HTML
<?xml version="1.0" encoding="UTF-8"?>
|
|
<!DOCTYPE html
|
|
PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
|
|
<html lang="en-us" xml:lang="en-us">
|
|
<head>
|
|
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
|
|
<meta name="security" content="public" />
|
|
<meta name="Robots" content="index,follow" />
|
|
<meta http-equiv="PICS-Label" content='(PICS-1.1 "http://www.icra.org/ratingsv02.html" l gen true r (cz 1 lz 1 nz 1 oz 1 vz 1) "http://www.rsac.org/ratingsv01.html" l gen true r (n 0 s 0 v 0 l 0) "http://www.classify.org/safesurf/" l gen true r (SS~~000 1))' />
|
|
<meta name="DC.Type" content="reference" />
|
|
<meta name="DC.Title" content="Example: Client application that uses AF_UNIX address family" />
|
|
<meta name="abstract" content="This example provides a sample client application for the AF_UNIX address family. The AF_UNIX address family uses many of the same socket calls as other address families, except that it uses the path name structure to identify the server application." />
|
|
<meta name="description" content="This example provides a sample client application for the AF_UNIX address family. The AF_UNIX address family uses many of the same socket calls as other address families, except that it uses the path name structure to identify the server application." />
|
|
<meta name="DC.Relation" scheme="URI" content="uafunix.htm" />
|
|
<meta name="copyright" content="(C) Copyright IBM Corporation 2001, 2006" />
|
|
<meta name="DC.Rights.Owner" content="(C) Copyright IBM Corporation 2001, 2006" />
|
|
<meta name="DC.Format" content="XHTML" />
|
|
<meta name="DC.Identifier" content="xafunixcl" />
|
|
<meta name="DC.Language" content="en-us" />
|
|
<!-- All rights reserved. Licensed Materials Property of IBM -->
|
|
<!-- US Government Users Restricted Rights -->
|
|
<!-- Use, duplication or disclosure restricted by -->
|
|
<!-- GSA ADP Schedule Contract with IBM Corp. -->
|
|
<link rel="stylesheet" type="text/css" href="./ibmdita.css" />
|
|
<link rel="stylesheet" type="text/css" href="./ic.css" />
|
|
<title>Example: Client application that uses AF_UNIX address family</title>
|
|
</head>
|
|
<body id="xafunixcl"><a name="xafunixcl"><!-- --></a>
|
|
<!-- Java sync-link --><script language="Javascript" src="../rzahg/synch.js" type="text/javascript"></script>
|
|
<h1 class="topictitle1">Example: Client application that uses AF_UNIX address family</h1>
|
|
<div><p>This example provides a sample client application for the AF_UNIX
|
|
address family. The AF_UNIX address family uses many of the same socket calls
|
|
as other address families, except that it uses the path name
|
|
structure to identify the server application. </p>
|
|
<div class="section"><p>The following sample program uses the AF_UNIX address family to
|
|
create a client connection to a server.</p>
|
|
<div class="note"><span class="notetitle">Note:</span> By using the code examples,
|
|
you agree to the terms of the <a href="codedisclaimer.htm">Code license and disclaimer information</a>.</div>
|
|
</div>
|
|
<div class="section"><pre>/**************************************************************************/
|
|
/* This sample program provides code for a client application that uses */
|
|
/* AF_UNIX address family */
|
|
/**************************************************************************/
|
|
/**************************************************************************/
|
|
/* Header files needed for this sample program */
|
|
/**************************************************************************/
|
|
#include <stdio.h>
|
|
#include <string.h>
|
|
#include <sys/types.h>
|
|
#include <sys/socket.h>
|
|
#include <sys/un.h>
|
|
|
|
/**************************************************************************/
|
|
/* Constants used by this program */
|
|
/**************************************************************************/
|
|
#define SERVER_PATH "/tmp/server"
|
|
#define BUFFER_LENGTH 250
|
|
#define FALSE 0
|
|
|
|
/* Pass in 1 parameter which is either the */
|
|
/* path name of the server as a UNICODE */
|
|
/* string, or set the server path in the */
|
|
/* #define SERVER_PATH which is a CCSID */
|
|
/* 500 string. */
|
|
void main(int argc, char *argv[])
|
|
{
|
|
/***********************************************************************/
|
|
/* Variable and structure definitions. */
|
|
/***********************************************************************/
|
|
int sd=-1, rc, bytesReceived;
|
|
char buffer[BUFFER_LENGTH];
|
|
struct sockaddr_un serveraddr;
|
|
|
|
/***********************************************************************/
|
|
/* A do/while(FALSE) loop is used to make error cleanup easier. The */
|
|
/* close() of the socket descriptor is only done once at the very end */
|
|
/* of the program. */
|
|
/***********************************************************************/
|
|
do
|
|
{
|
|
/********************************************************************/
|
|
/* The socket() function returns a socket descriptor representing */
|
|
/* an endpoint. The statement also identifies that the UNIX */
|
|
/* address family with the stream transport (SOCK_STREAM) will be */
|
|
/* used for this socket. */
|
|
/********************************************************************/
|
|
sd = socket(AF_UNIX, SOCK_STREAM, 0);
|
|
if (sd < 0)
|
|
{
|
|
perror("socket() failed");
|
|
break;
|
|
}
|
|
|
|
/********************************************************************/
|
|
/* If an argument was passed in, use this as the server, otherwise */
|
|
/* use the #define that is located at the top of this program. */
|
|
/********************************************************************/
|
|
memset(&serveraddr, 0, sizeof(serveraddr));
|
|
serveraddr.sun_family = AF_UNIX;
|
|
if (argc > 1)
|
|
strcpy(serveraddr.sun_path, argv[1]);
|
|
else
|
|
strcpy(serveraddr.sun_path, SERVER_PATH);
|
|
|
|
/********************************************************************/
|
|
/* Use the connect() function to establish a connection to the */
|
|
/* server. */
|
|
/********************************************************************/
|
|
rc = connect(sd, (struct sockaddr *)&serveraddr, SUN_LEN(&serveraddr));
|
|
if (rc < 0)
|
|
{
|
|
perror("connect() failed");
|
|
break;
|
|
}
|
|
|
|
/********************************************************************/
|
|
/* Send 250 bytes of a's to the server */
|
|
/********************************************************************/
|
|
memset(buffer, 'a', sizeof(buffer));
|
|
rc = send(sd, buffer, sizeof(buffer), 0);
|
|
if (rc < 0)
|
|
{
|
|
perror("send() failed");
|
|
break;
|
|
}
|
|
|
|
/********************************************************************/
|
|
/* In this example we know that the server is going to respond with */
|
|
/* the same 250 bytes that we just sent. Since we know that 250 */
|
|
/* bytes are going to be sent back to us, we can use the */
|
|
/* SO_RCVLOWAT socket option and then issue a single recv() and */
|
|
/* retrieve all of the data. */
|
|
/* */
|
|
/* The use of SO_RCVLOWAT is already illustrated in the server */
|
|
/* side of this example, so we will do something different here. */
|
|
/* The 250 bytes of the data may arrive in separate packets, */
|
|
/* therefore we will issue recv() over and over again until all */
|
|
/* 250 bytes have arrived. */
|
|
/********************************************************************/
|
|
bytesReceived = 0;
|
|
while (bytesReceived < BUFFER_LENGTH)
|
|
{
|
|
rc = recv(sd, & buffer[bytesReceived],
|
|
BUFFER_LENGTH - bytesReceived, 0);
|
|
if (rc < 0)
|
|
{
|
|
perror("recv() failed");
|
|
break;
|
|
}
|
|
else if (rc == 0)
|
|
{
|
|
printf("The server closed the connection\n");
|
|
break;
|
|
}
|
|
|
|
/*****************************************************************/
|
|
/* Increment the number of bytes that have been received so far */
|
|
/*****************************************************************/
|
|
bytesReceived += rc;
|
|
}
|
|
|
|
} while (FALSE);
|
|
|
|
/***********************************************************************/
|
|
/* Close down any open socket descriptors */
|
|
/***********************************************************************/
|
|
if (sd != -1)
|
|
close(sd);
|
|
}</pre>
|
|
</div>
|
|
</div>
|
|
<div>
|
|
<div class="familylinks">
|
|
<div class="parentlink"><strong>Parent topic:</strong> <a href="uafunix.htm" title="The AF_UNIX address family (sockets using the AF_UNIX or AF_UNIX_CCSID address families) can be connection-oriented (type SOCK_STREAM) or they can be connectionless (type SOCK_DGRAM).">Use AF_UNIX address family</a></div>
|
|
</div>
|
|
</div>
|
|
</body>
|
|
</html> |