244 lines
9.3 KiB
HTML
244 lines
9.3 KiB
HTML
<?xml version="1.0" encoding="UTF-8"?>
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<!DOCTYPE html
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PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
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<html lang="en-us" xml:lang="en-us">
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<head>
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<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
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<meta name="security" content="public" />
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<meta name="Robots" content="index,follow" />
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<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))' />
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<meta name="DC.Type" content="reference" />
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<meta name="DC.Title" content="Example: Use accept_and_recv() and send_file() APIs to send contents of a file" />
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<meta name="abstract" content="This example enables a server to communicate with a client by using the send_file() and accept_and_recv() APIs." />
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<meta name="description" content="This example enables a server to communicate with a client by using the send_file() and accept_and_recv() APIs." />
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<meta name="DC.Relation" scheme="URI" content="xsendfile.htm" />
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<meta name="DC.Relation" scheme="URI" content="../apis/sendfile.htm" />
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<meta name="DC.Relation" scheme="URI" content="../apis/acceptr.htm" />
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<meta name="copyright" content="(C) Copyright IBM Corporation 2001, 2006" />
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<meta name="DC.Rights.Owner" content="(C) Copyright IBM Corporation 2001, 2006" />
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<meta name="DC.Format" content="XHTML" />
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<meta name="DC.Identifier" content="x1sendfile" />
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<meta name="DC.Language" content="en-us" />
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<!-- All rights reserved. Licensed Materials Property of IBM -->
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<!-- US Government Users Restricted Rights -->
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<!-- Use, duplication or disclosure restricted by -->
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<!-- GSA ADP Schedule Contract with IBM Corp. -->
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<link rel="stylesheet" type="text/css" href="./ibmdita.css" />
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<link rel="stylesheet" type="text/css" href="./ic.css" />
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<title>Example: Use accept_and_recv() and send_file() APIs
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to send contents of a file</title>
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</head>
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<body id="x1sendfile"><a name="x1sendfile"><!-- --></a>
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<!-- Java sync-link --><script language="Javascript" src="../rzahg/synch.js" type="text/javascript"></script>
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<h1 class="topictitle1">Example: Use <span class="apiname">accept_and_recv()</span> and <span class="apiname">send_file()</span> APIs
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to send contents of a file</h1>
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<div><p>This example enables a server to communicate with a client by using
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the <span class="apiname">send_file()</span> and <span class="apiname">accept_and_recv()</span> APIs.</p>
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<div class="section"><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>
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<pre>/*************************************************/
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/* Server example send file data to client */
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/*************************************************/
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#include <stdio.h>
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#include <stdlib.h>
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#include <errno.h>
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#include <fcntl.h>
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#include <sys/socket.h>
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#include <netinet/in.h>
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#define SERVER_PORT 12345
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main (int argc, char *argv[])
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{
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int i, num, rc, flag = 1;
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int fd, listen_sd, accept_sd = -1;
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size_t local_addr_length;
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size_t remote_addr_length;
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size_t total_sent;
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struct sockaddr_in addr;
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struct sockaddr_in local_addr;
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struct sockaddr_in remote_addr;
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struct sf_parms parms;
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char buffer[255];
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/*************************************************/
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/* If an argument is specified, use it to */
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/* control the number of incoming connections */
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/*************************************************/
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if (argc >= 2)
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num = atoi(argv[1]);
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else
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num = 1;
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/*************************************************/
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/* Create an AF_INET stream socket to receive */
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/* incoming connections on */
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/*************************************************/
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listen_sd = socket(AF_INET, SOCK_STREAM, 0);
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if (listen_sd < 0)
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{
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perror("socket() failed");
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exit(-1);
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}
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/*************************************************/
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/* Set the SO_REUSEADDR bit so that you do not */
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/* need to wait 2 minutes before restarting */
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/* the server */
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/*************************************************/
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rc = setsockopt(listen_sd,
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SOL_SOCKET,
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SO_REUSEADDR,
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(char *)&flag,
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sizeof(flag));
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if (rc < 0)
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{
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perror("setsockop() failed");
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close(listen_sd);
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exit(-1);
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}
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/*************************************************/
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/* Bind the socket */
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/*************************************************/
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memset(&addr, 0, sizeof(addr));
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addr.sin_family = AF_INET;
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addr.sin_addr.s_addr = htonl(INADDR_ANY);
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addr.sin_port = htons(SERVER_PORT);
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rc = bind(listen_sd,
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(struct sockaddr *)&addr, sizeof(addr));
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if (rc < 0)
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{
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perror("bind() failed");
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close(listen_sd);
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exit(-1);
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}
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/*************************************************/
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/* Set the listen backlog */
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/*************************************************/
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rc = listen(listen_sd, 5);
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if (rc < 0)
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{
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perror("listen() failed");
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close(listen_sd);
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exit(-1);
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}
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/*************************************************/
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/* Initialize the local and remote addr lengths */
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/*************************************************/
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local_addr_length = sizeof(local_addr);
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remote_addr_length = sizeof(remote_addr);
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/*************************************************/
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/* Inform the user that the server is ready */
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/*************************************************/
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printf("The server is ready\n");
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/*************************************************/
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/* Go through the loop once for each connection */
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/*************************************************/
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for (i=0; i < num; i++)
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{
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/**********************************************/
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/* Wait for an incoming connection */
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/**********************************************/
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printf("Iteration: %d\n", i+1);
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printf(" waiting on accept_and_recv()\n");
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rc = accept_and_recv(listen_sd,
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&accept_sd,
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(struct sockaddr *)&remote_addr,
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&remote_addr_length,
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(struct sockaddr *)&local_addr,
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&local_addr_length,
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&buffer,
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sizeof(buffer));
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if (rc < 0)
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{
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perror("accept_and_recv() failed");
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close(listen_sd);
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close(accept_sd);
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exit(-1);
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}
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printf(" Request for file: %s\n", buffer);
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/**********************************************/
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/* Open the file to retrieve */
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/**********************************************/
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fd = open(buffer, O_RDONLY);
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if (fd < 0)
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{
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perror("open() failed");
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close(listen_sd);
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close(accept_sd);
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exit(-1);
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}
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/**********************************************/
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/* Initialize the sf_parms structure */
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/**********************************************/
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memset(&parms, 0, sizeof(parms));
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parms.file_descriptor = fd;
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parms.file_bytes = -1;
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/**********************************************/
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/* Initialize the counter of the total number */
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/* of bytes sent */
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/**********************************************/
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total_sent = 0;
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/**********************************************/
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/* Loop until the entire file has been sent */
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/**********************************************/
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do
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{
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rc = send_file(&accept_sd, &parms, SF_CLOSE);
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if (rc < 0)
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{
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perror("send_file() failed");
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close(fd);
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close(listen_sd);
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close(accept_sd);
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exit(-1);
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}
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total_sent += parms.bytes_sent;
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} while (rc == 1);
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printf(" Total number of bytes sent: %d\n", total_sent);
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/**********************************************/
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/* Close the file that is sent out */
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/**********************************************/
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close(fd);
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}
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/*************************************************/
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/* Close the listen socket */
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/*************************************************/
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close(listen_sd);
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/*************************************************/
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/* Close the accept socket */
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/*************************************************/
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if (accept_sd != -1)
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close(accept_sd);
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}</pre>
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</div>
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</div>
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<div>
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<div class="familylinks">
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<div class="parentlink"><strong>Parent topic:</strong> <a href="xsendfile.htm" title="These examples enable a server to communicate with a client by using the send_file() and accept_and_recv() APIs.">Examples: Transfer file data using send_file() and accept_and_recv() APIs</a></div>
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</div>
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<div class="relinfo"><strong>Related information</strong><br />
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<div><a href="../apis/sendfile.htm">send_file()</a></div>
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<div><a href="../apis/acceptr.htm">accept_and_recv()</a></div>
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</div>
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</div>
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</body>
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</html> |