| Index: net/third_party/udt/doc/doc/t-hello.htm
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| --- net/third_party/udt/doc/doc/t-hello.htm (revision 78992)
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| -<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
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| -<html xmlns="http://www.w3.org/1999/xhtml">
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| -<head>
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| -<meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1" />
|
| -<title>Introduction</title>
|
| -<link rel="stylesheet" href="udtdoc.css" type="text/css" />
|
| -</head>
|
| -
|
| -<body>
|
| -<div class="ref_head"> UDT Tutorial</div>
|
| -
|
| -<h3><font color="#000080">Hello World!</font></h3>
|
| -<p>In this section we will introduce the simplest UDT program that can transfer data in high performance.</p>
|
| -
|
| -<p>This simple "Hello World!" example includes a server program and a client program just like any socket programming tutorial. These are the simpler version of the appserver and appclient
|
| -examples in ./app directory.</p>
|
| -
|
| -<p>To compile, use <em>gcc -o server server.cpp -I
|
| - <udt.h location>
|
| - -L
|
| - <libudt.so location>
|
| --ludt -lstdc++ -lpthread</em>. For more details, please refer to the Makefile in <em>./app</em> directory.</p>
|
| -
|
| -<p><b>UDT server example</b></p>
|
| -
|
| -<div class="code">
|
| -#include <arpa/inet.h><br>
|
| -#include <udt.h><br>
|
| -#include <iostream.h><br>
|
| -<br>
|
| -using namespace std;<br>
|
| -<br>
|
| -int main()<br>
|
| -{<br>
|
| -UDTSOCKET serv = UDT::socket(AF_INET, SOCK_STREAM, 0);<br>
|
| -<br>
|
| -sockaddr_in my_addr;<br>
|
| -my_addr.sin_family = AF_INET;<br>
|
| -my_addr.sin_port = htons(9000);<br>
|
| -my_addr.sin_addr.s_addr = INADDR_ANY;<br>
|
| -memset(&(my_addr.sin_zero), '\0', 8);<br>
|
| -<br>
|
| -if (UDT::ERROR == UDT::bind(serv, (sockaddr*)&my_addr, sizeof(my_addr)))<br>
|
| -{<br>
|
| - cout << "bind: " << UDT::getlasterror().getErrorMessage();<br>
|
| - return 0;<br>
|
| -}<br>
|
| -<br>
|
| -UDT::listen(serv, 10);<br>
|
| -<br>
|
| -int namelen;<br>
|
| -sockaddr_in their_addr;<br>
|
| -<br>
|
| -UDTSOCKET recver = UDT::accept(serv, (sockaddr*)&their_addr, &namelen);<br>
|
| -<br>
|
| -char ip[16];<br>
|
| -cout << "new connection: " << inet_ntoa(their_addr.sin_addr) << ":" << ntohs(their_addr.sin_port) << endl;<br>
|
| -<br>
|
| -char data[100];<br>
|
| -<br>
|
| -if (UDT::ERROR == UDT::recv(recver, data, 100, 0))<br>
|
| -{<br>
|
| - cout << "recv:" << UDT::getlasterror().getErrorMessage() << endl;<br>
|
| - return 0;<br>
|
| -}<br>
|
| -<br>
|
| -cout << data << endl;<br>
|
| -<br>
|
| -UDT::close(recver);<br>
|
| -UDT::close(serv);<br>
|
| -<br>
|
| -return 1;<br>
|
| -}
|
| -</div>
|
| -
|
| -<p>This simple server tries to bind itself at port 9000. If succeed, it listens at port 9000 and accepts a client and then reads a string.</p>
|
| -<p><strong>UDT client example </strong></p>
|
| -<div class="code">
|
| -#include <iostream><br>
|
| -#include <udt.h><br>
|
| -#include <arpa/inet.h><br>
|
| -<br>
|
| -using namespace std;<br>
|
| -using namespace UDT;<br>
|
| -<br>
|
| -int main()<br>
|
| -{<br>
|
| -UDTSOCKET client = UDT::socket(AF_INET, SOCK_STREAM, 0);<br>
|
| -<br>
|
| -sockaddr_in serv_addr;<br>
|
| -serv_addr.sin_family = AF_INET;<br>
|
| -serv_addr.sin_port = htons(9000);<br>
|
| -inet_pton(AF_INET, "127.0.0.1", &serv_addr.sin_addr);<br>
|
| -<br>
|
| -memset(&(serv_addr.sin_zero), '\0', 8);<br>
|
| -<br>
|
| -// connect to the server, implict bind<br>
|
| -if (UDT::ERROR == UDT::connect(client, (sockaddr*)&serv_addr, sizeof(serv_addr)))<br>
|
| -{<br>
|
| - cout << "connect: " << UDT::getlasterror().getErrorMessage();<br>
|
| - return 0;<br>
|
| -}<br>
|
| -<br>
|
| -char* hello = "hello world!\n";<br>
|
| -if (UDT::ERROR == UDT::send(client, hello, strlen(hello) + 1, 0))<br>
|
| -{<br>
|
| - cout << "send: " << UDT::getlasterror().getErrorMessage();<br>
|
| - return 0;<br>
|
| -}<br>
|
| -<br>
|
| -UDT::close(client);<br>
|
| -<br>
|
| -return 1;<br>
|
| -}
|
| -</div>
|
| -
|
| -<p>The client side connects to the local address (127.0.0.1) at port 9000, and sends a "hello world!" message.</p>
|
| -<p>Note that in this "Hello World!" example the UDT::send and UDT::recv routines should use a loop to check return value. However, since the string length is very small and can be hold in one packet, we omit the loop part in order to give a simpler example.</p>
|
| -
|
| -<p> </p>
|
| -</body>
|
| -</html>
|
|
|
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