Hello i made a php socket server to get data from plc, plc is configured as tcp socket client.
I've a seriuous problem, if local net go down seems that function socket_accept stalled, plc don'be able to send me data.
If i restart my server plc reconnect correctly.
Can someone hel me?
My server code:
error_reporting(E_ALL);
/* Allow the script to hang around waiting for connections. */
set_time_limit(0);
/* Turn on implicit output flushing so we see what we're getting
* as it comes in. */
ob_implicit_flush();
$address = ipserver;
$port = 10001;
if (($sock = socket_create(AF_INET, SOCK_STREAM, getprotobyname("TCP"))) === false) {
echo "socket_create() failed: reason: " . socket_strerror(socket_last_error()) . "\n";
exit;
}
if (!socket_set_option($sock, SOL_SOCKET, SO_REUSEADDR, 1)) {
echo socket_strerror(socket_last_error($sock));
exit;
}
if (socket_bind($sock, $address, $port) === false) {
echo "socket_bind() failed: reason: " . socket_strerror(socket_last_error($sock)) . "\n";
exit;
}
if (socket_listen($sock, 5) === false) {
echo "socket_listen() failed: reason: " . socket_strerror(socket_last_error($sock)) . "\n";
exit;
}
while(true)
{
//$remote_fd = socket_accept($sock);
if (($remote_fd = socket_accept($sock)) === false) {
echo "socket_accept() failed: reason: " . socket_strerror(socket_last_error($sock)) . "\n";
break ;
}
do {
$recv = "";
if (false === ($recv = socket_read($remote_fd, 128, PHP_BINARY_READ))) {
echo "socket_read() failed: reason: " . socket_strerror(socket_last_error($remote_fd)) . "\n";
#break 2;
}
if($recv != "") {
echo $recv."\n";
inserisci_letture("t_letture",trim($recv));
if($sent=socket_write($remote_fd,"1",1)===false)
{
echo "socket_write() failed: reason: " . socket_strerror(socket_last_error($remote_fd)) . "\n";
}
}
}
while($recv != "");
}
socket_shutdown($sock);
socket_close($sock);
?>
Listen on 0.0.0.0 instead of a specific interface, so that the socket is not closed if the network (the interface) does down. This is a special address that listens on all interfaces.
Related
I am trying to connect to a TCP socket server using php. First 2 connections and send it is successfull but after that it can not read, hangs at socket_read.
<?php
if (($sock = socket_create(AF_INET, SOCK_STREAM, SOL_TCP)) === false) {
echo "socket_create() failed: reason: " . socket_strerror(socket_last_error()) . "\n";
}
if (socket_connect($sock, '127.0.0.1', 10000) === false) {
echo "socket_connect() failed: reason: " . socket_strerror(socket_last_error()) . "\n";
}
do {
$stdin = fopen('php://stdin', 'r');
$msg = trim(fgets($stdin));
socket_write($sock, $msg, strlen($msg));
if (false === ($buf = socket_read($sock, 2048, PHP_NORMAL_READ))) {
echo "socket_read() failed: reason: " . socket_strerror(socket_last_error($sock)) . "\n";
}
echo "response: $buf \n";
} while (true);
Server is functioning properly there are no problems on that end. Any suggestions anyone ?
I have made a socket connection using php which is working perfectly below is the code for single socket but not working with multiple connections only accepts one connection at a time
error_reporting(E_ALL);
// sudo lsof -t -i:10000
// php -f server.php
/* Allow the script to hang around waiting for connections. */
set_time_limit(0);
/* Turn on implicit output flushing so we see what we're getting
* as it comes in. */
ob_implicit_flush();
$address = '192.168.5.155';
$port = 3490;
if (($sock = socket_create(AF_INET, SOCK_STREAM, SOL_TCP)) === false) {
echo "socket_create() failed: reason: " . socket_strerror(socket_last_error()) . "\n";
}
if (socket_bind($sock, $address, $port) === false) {
echo "socket_bind() failed: reason: " . socket_strerror(socket_last_error($sock)) . "\n";
}
if (socket_listen($sock, 1024) === false) {
echo "socket_listen() failed: reason: " . socket_strerror(socket_last_error($sock)) . "\n";
}
do {
if (($msgsock = socket_accept($sock)) === false) {
echo "socket_accept() failed: reason: " . socket_strerror(socket_last_error($sock)) . "\n";
break;
}
/* Send instructions. */
$msg = "\nWelcome to the PHP Test Server. \n" .
"To quit, type 'quit'. To shut down the server type 'shutdown'.\n";
socket_write($msgsock, $msg, strlen($msg));
do {
if (false === ($buf = socket_read($msgsock, 2048, PHP_BINARY_READ))) {
/*echo "socket_read() failed: reason: " . socket_strerror(socket_last_error($msgsock)) . "\n";
break 2;*/
}
if (!$buf = trim($buf)) {
continue;
}
if ($buf == 'quit') {
break 2;
}
if ($buf == 'shutdown') {
socket_close($msgsock);
break 2;
}
$talkback = "PHP: You said '$buf'.\n";
if($buf != '')
{
$req_get = $talkback;
$file = time();
$fp = fopen('data/'.$file.'.txt', 'a+');
fwrite($fp, $req_get);
fclose($fp);
socket_write($msgsock, $talkback, strlen($talkback));
}
//echo "$buf\n";
} while (true);
socket_close($msgsock);
} while (true);
socket_close($sock);
I need a help to just make it work with multiple connection with clients.
After that i need to make entry into database from client sent data.
You can't listen many sockets using blocking socket connections at the same time. What you need is non-blocking socket connections with socket_select method instead of socket_accept.
My suggestion is to use some kind of PHP event-loop implementations (like reactphp).
Anyway, if you still want to implement it yourself, you can check the example of stream_select usage in reactphp/event-loop StreamSelectLoop implementation.
I have a domain (ad-box.deslab.vn). I want to PHP socket to communicate with clients. However, After I run program, it has error:
****Warning: socket_bind(): unable to bind address [22]: Invalid argument in /home/vietchip/public_html/deslab.vn/ad-box/index.php on line 27
socket_bind() failed: reason: Invalid argument socket_bind() failed: reason: Invalid argument****
Link: ad-box.deslab.vn/index.php
Code:
<?php
error_reporting(E_ALL);
/* Allow the script to hang around waiting for connections. */
set_time_limit(0);
/* Turn on implicit output flushing so we see what we're getting
* as it comes in. */
ob_implicit_flush();
$address = "181.224.157.142";
$port = 10000;
// Create Socket
$sock = socket_create(AF_INET, SOCK_STREAM, SOL_TCP);
if ($sock === false) {
echo "socket_create() failed: reason: " . socket_strerror(socket_last_error()) . "\n";
}
if (!socket_set_option($sock, SOL_SOCKET, SO_REUSEADDR, 1)) {
echo socket_strerror(socket_last_error($sock));
exit;
}
// Bind socket to port
socket_bind($sock, $address, $port);
if (socket_bind($sock, $address, $port) === false) {
echo "socket_bind() failed: reason: " . socket_strerror(socket_last_error($sock)) . "\n";
}
// Start listening for connection
socket_listen($sock, 5); // Maximum is 5 connection
if (socket_listen($sock, 5) === false) {
echo "socket_listen() failed: reason: " . socket_strerror(socket_last_error($sock)) . "\n";
}
// Handling connection from client
do {
$msgsock = socket_accept($sock); // msgsock is a client connect to webserver
if ($msgsock === false) {
echo "socket_accept() failed: reason: " . socket_strerror(socket_last_error($sock)) . "\n";
break;
}
$request ="PHP said : you are sent " . socket_read($msgsock, 2048, PHP_BINARY_READ);
socket_write($msgsock, $request, strlen($request));
socket_close($msgsock); // Close connect of client
} while (true);
socket_close($sock); // Close socket of server
?>
Please help me fix it.
Thanks.
I wanted to implement a chat service in PHP for which I am using socket programming.
Below are the client and server file I found to implement it:
Server.php
#!/usr/local/bin/php -q
<?php
error_reporting(E_ALL);
/* Allow the script to hang around waiting for connections. */
set_time_limit(0);
/* Turn on implicit output flushing so we see what we're getting
* as it comes in. */
ob_implicit_flush();
$address = '192.168.1.53';
$port = 10000;
if (($sock = socket_create(AF_INET, SOCK_STREAM, SOL_TCP)) === false) {
echo "socket_create() failed: reason: " . socket_strerror(socket_last_error()) . "\n";
}
if (socket_bind($sock, $address, $port) === false) {
echo "socket_bind() failed: reason: " . socket_strerror(socket_last_error($sock)) . "\n";
}
if (socket_listen($sock, 5) === false) {
echo "socket_listen() failed: reason: " . socket_strerror(socket_last_error($sock)) . "\n";
}
do {
if (($msgsock = socket_accept($sock)) === false) {
echo "socket_accept() failed: reason: " . socket_strerror(socket_last_error($sock)) . "\n";
break;
}
/* Send instructions. */
$msg = "\nWelcome to the PHP Test Server. \n" .
"To quit, type 'quit'. To shut down the server type 'shutdown'.\n";
socket_write($msgsock, $msg, strlen($msg));
do {
if (false === ($buf = socket_read($msgsock, 2048, PHP_NORMAL_READ))) {
echo "socket_read() failed: reason: " . socket_strerror(socket_last_error($msgsock)) . "\n";
break 2;
}
if (!$buf = trim($buf)) {
continue;
}
if ($buf == 'quit') {
break;
}
if ($buf == 'shutdown') {
socket_close($msgsock);
break 2;
}
$talkback = "PHP: You said '$buf'.\n";
socket_write($msgsock, $talkback, strlen($talkback));
echo "$buf\n";
} while (true);
socket_close($msgsock);
} while (true);
socket_close($sock);
?>
Client.php:
<?php
error_reporting(E_ALL);
echo "<h2>TCP/IP Connection</h2>\n";
/* Get the port for the WWW service. */
$service_port = getservbyname('www', 'tcp');
/* Get the IP address for the target host. */
$address = gethostbyname('www.example.com');
/* Create a TCP/IP socket. */
$socket = socket_create(AF_INET, SOCK_STREAM, SOL_TCP);
if ($socket === false) {
echo "socket_create() failed: reason: " . socket_strerror(socket_last_error()) . "\n";
} else {
echo "OK.\n";
}
echo "Attempting to connect to '$address' on port '$service_port'...";
$result = socket_connect($socket, $address, $service_port);
if ($result === false) {
echo "socket_connect() failed.\nReason: ($result) " . socket_strerror(socket_last_error($socket)) . "\n";
} else {
echo "OK.\n";
}
$in = "HEAD / HTTP/1.1\r\n";
$in .= "Host: www.example.com\r\n";
$in .= "Connection: Close\r\n\r\n";
$out = '';
echo "Sending HTTP HEAD request...";
socket_write($socket, $in, strlen($in));
echo "OK.\n";
echo "Reading response:\n\n";
while ($out = socket_read($socket, 2048)) {
echo $out;
}
echo "Closing socket...";
socket_close($socket);
echo "OK.\n\n";
?>
But I am not able to understand one thing in this process.I will be hosting this application to a remote server and both the files will reside in that server.Now the line socket_connect() in client.php would try to connect with the IP address I pass to this function as a parameter,and,for the application to work I need both the server.php and client.php files.
Now, let us assume that the client.php sends a request to a particular user X,now for the user X to accept that request,he should also have a server.php file to accept the HTTP request made,but the server.php is on the server where the application is hosted.So how the user X's machine will be able to accept the request?
Can anyone please tell how this will be handled or please correct me if I misunderstood the process?
I have created a socket using php by this code.
<?php
error_reporting(E_ALL);
/* Allow the script to hang around waiting for connections. */
set_time_limit(0);
/* Turn on implicit output flushing so we see what we're getting
* as it comes in. */
ob_implicit_flush();
$address = '127.0.0.1';
$port = 5000;
if (($sock = socket_create(AF_INET, SOCK_STREAM, SOL_TCP)) === false) {
echo "socket_create() failed: reason: " . socket_strerror(socket_last_error()) . "\n";
}
if (socket_bind($sock, $address, $port) === false) {
echo "socket_bind() failed: reason: " . socket_strerror(socket_last_error($sock)) . "\n";
}
if (socket_listen($sock, 5) === false) {
echo "socket_listen() failed: reason: " . socket_strerror(socket_last_error($sock)) . "\n";
}
do {
if (($msgsock = socket_accept($sock)) === false) {
echo "socket_accept() failed: reason: " . socket_strerror(socket_last_error($sock)) . "\n";
break;
}
/* Send instructions. */
$msg = "\nWelcome to the PHP Test Server. \n" .
"To quit, type 'quit'. To shut down the server type 'shutdown'.\n";
socket_write($msgsock, $msg, strlen($msg));
do {
if (false === ($buf = socket_read($msgsock, 2048, PHP_NORMAL_READ))) {
echo "socket_read() failed: reason: " . socket_strerror(socket_last_error($msgsock)) . "\n";
break 2;
}
if (!$buf = trim($buf)) {
continue;
}
if ($buf == 'quit') {
break;
}
if ($buf == 'shutdown') {
socket_close($msgsock);
break 2;
}
$talkback = "PHP: You said '$buf'.\n";
socket_write($msgsock, $talkback, strlen($talkback));
echo "$buf\n";
} while (true);
socket_close($msgsock);
} while (true);
socket_close($sock);
?>
It is working fine in the case php. But i want to read the message sent through cmd in node Js so that we could notify the client for the message. But i tried to much by using socket.io but did not get success. Please help.
Thanks in advance.