1 #!/usr/local/bin/php -q
2
3 <?php
4 /*
5 * We don't want any time-limit for how the long can hang
6 * around, waiting for connections:
7 */
8 set_time_limit(0);
9
10 /* Create a new socket: */
11 if( ($sock = socket( AF_INET, SOCK_STREAM, 0 )) < 0 )
12 {
13 print strerror( $sock ) . "n";
14 exit(1);
15 }
16
17 /* Bind the socket to an address and a port: */
18 if( ($ret = bind( $sock, "10.31.172.77", 10000 )) < 0 )
19 {
20 print strerror( $ret ) . "n";
21 exit(1);
22 }
23
24 /*
25 * Listen for incoming connections on $sock.
26 * The '5' means that we allow 5 queued connections.
27 */
28 if( ($ret = listen( $sock, 5 )) < 0 )
29 {
30 print strerror( $ret ) . "n";
31 }
32
33 /* Accept incoming connections: */
34 if( ($msgsock = accept_connect( $sock )) < 0)
35 {
36 print strerror( $msgsock ) . "n";
37 exit(1);
38 }
39
40 /* Send the welcome-message: */
41 $message = "Welcome to my TCP-server!n";
42 if( ($ret = write( $msgsock, $message, strlen($message)) ) < 0 )
43 {
44 print strerror( $msgsock ) . "n";
45 exit(1);
46 }
47
48 /* Read/Receive some data from the client: */
49 $buf = '';
50 if( ($ret = read( $msgsock, $buf, 128 )) < 0 )
51 {
52 print strerror( $ret ) . "n";
53 exit(1);
54 }
55
56 /* Echo the received data back to the client: */
57 if( ($ret = write( $msgsock, "You said: $bufn", strlen("You said: $bufn")) ) < 0 )
58 {
59 print strerror( $ret ) . "n";
60 exit(1);
61 }
62
63 /* Close the communication-socket: */
64 close( $msgsock );
65
66 /* Close the global socket: */
67 close( $sock );
68 ?>

$socket = socket( AF_INET,SOCK_STREAM, 0);
// 首先建立一個 socket, 族為 AF_INET, 類型為 SOCK_STREAM.
// AF_INET = ARPA Internet protocols 即使用 TCP/IP 協議族
// SOCK_STREAM 類型提供了順序的, 可靠的, 基于字節流的全雙工連接.
// 由于該協議族中只有一個協議, 因此第三個參數為 0

　
bind ($sock, $address, $port)
// 再將這個 socket 與某個地址進行綁定.

listen( sockfd, MAX_CLIENT)
// 地址綁定之后, server 進入監聽狀態.
// MAX_CLIENT 是可以同時建立連接的 client 總數.

server 進入 listen 狀態后, 等待 client 建立連接。

Client端要建立連接首先也需要初始化連接：

$socket= socket( AF_INET,SOCK_STREAM,0))
// 同樣的, client 也先建立一個 socket, 其參數與 server 相同.

connect ($socket, $address, $service_port)
// client 使用 connect 建立一個連接.

當 client 建立新連接的請求被送到Server端時, server 使用 accept 來接受該連接:

accept_connect($sock)
// accept 返回一個新的文件描述符.

<?php
$cfgServer = "news.php.net";
$cfgPort = 119;
$cfgTimeOut = 10;

// open a socket
if(!$cfgTimeOut)
// without timeout
$usenet_handle = fsockopen($cfgServer, $cfgPort);
else
// with timeout
$usenet_handle = fsockopen($cfgServer, $cfgPort, &$errno, &$errstr, $cfgTimeOut);

if(!$usenet_handle) {
echo "Connexion failedn";
exit();
}
else {
echo "Connectedn";
$tmp = fgets($usenet_handle, 1024);
}
?>

GROUP ggg
<?php

//$cfgUser = "xxxxxx";
//$cfgPasswd = "yyyyyy";
$cfgNewsGroup = "alt.php";

// identification required on private server
if($cfgUser) {
fputs($usenet_handle, "AUTHINFO USER ".$cfgUser."n");
$tmp = fgets($usenet_handle, 1024);

fputs($usenet_handle, "AUTHINFO PASS ".$cfgPasswd."n");
$tmp = fgets($usenet_handle, 1024);

// check error

if($tmp != "281 Okrn") {
echo "502 Authentication errorn";
exit();
}
}

// select newsgroup

fputs($usenet_handle, "GROUP ".$cfgNewsGroup."n");
$tmp = fgets($usenet_handle, 1024);

if($tmp == "480 Authentication required for commandrn") {
echo "$tmpn";
exit();
}

$info = split(" ", $tmp);
$first = $info[2];
$last = $info[3];

print "First : $firstn";
print "Last : $lastn";
?>