PHP network communication IPv6 over TCP socket

Petr Faltus development

Example source code in PHP how to communicate in IPv6 over network TCP socket. The sender and the receiver.

net_tcp6_receiver.php

GitHub repository: network-socket-communication-source-codes

git clone https://github.com/petrfaltus/network-socket-communication-source-codes.git

Directories to net_tcp6_receiver.php in the repository: php/src

<?php

set_time_limit(0);

const RECEIVER_ADDRESS = "::0";
const RECEIVER_PORT = 10000;
const RECEIVED_MESSAGES_MAX = 10;
const BUFFER_SIZE = 4096;

echo "TCP IPv6 stream socket receiver".PHP_EOL;

$socket = @socket_create(AF_INET6, SOCK_STREAM, SOL_TCP);
if ($socket === false)
{
  exit("- socket_create() failed: ".socket_strerror(socket_last_error()).PHP_EOL);
}
echo "- socket created".PHP_EOL;

$bound = @socket_bind($socket, RECEIVER_ADDRESS, RECEIVER_PORT);
if ($bound === false)
{
  exit("- socket_bind() failed: ".socket_strerror(socket_last_error($socket)).PHP_EOL); 
}
echo "- socket bound on [".RECEIVER_ADDRESS."]:".RECEIVER_PORT.PHP_EOL;

$listening = @socket_listen($socket, RECEIVED_MESSAGES_MAX);
if ($listening === false)
{
  exit("- socket_listen() failed: ".socket_strerror(socket_last_error($socket)).PHP_EOL); 
}
echo "- socket is listening for max ".RECEIVED_MESSAGES_MAX." messages".PHP_EOL;

$stop = false;
while ($stop == false)
{
  $msgsock = @socket_accept($socket);
  if ($msgsock === false)
  {
    exit("- socket_accept() failed: ".socket_strerror(socket_last_error($socket)).PHP_EOL);
  }
  echo "- socket accepted request".PHP_EOL;

  $peer_address = "";
  $peer_port = 0;

  $peer = @socket_getpeername($msgsock, $peer_address, $peer_port);
  if ($peer === false)
  {
    exit("- socket_getpeername() failed: ".socket_strerror(socket_last_error($msgsock)).PHP_EOL);
  }

  $local_address = "";
  $local_port = 0;

  $local = @socket_getsockname($msgsock, $local_address, $local_port);
  if ($local === false)
  {
    exit("- socket_getsockname() failed: ".socket_strerror(socket_last_error($msgsock)).PHP_EOL);
  }
  echo "- peer connect from [".$peer_address."]:".$peer_port." on [".$local_address."]:".$local_port.PHP_EOL;

  $msg = "";

  $received_length = @socket_recv($msgsock, $msg, BUFFER_SIZE, 0);
  if ($received_length === false)
  {
    exit("- socket_recv() failed: ".socket_strerror(socket_last_error($msgsock)).PHP_EOL);
  }
  echo "- message ".$received_length."B received".PHP_EOL;
  echo "|".$msg."|".PHP_EOL;
      
  if ($msg == "stop")
  {
    // received message "stop" to stop the receiver
    $stop = true;
  }
   
  socket_close($msgsock); 
  echo "- socket closed request".PHP_EOL;
}

socket_close($socket);
echo "- socket closed".PHP_EOL;

?>

net_tcp6_sender.php

Directories to net_tcp6_sender.php in the repository: php/src

<?php

set_time_limit(0);

const RECEIVER_ADDRESS = "::1";
const RECEIVER_PORT = 10000;

echo "TCP IPv6 stream socket sender".PHP_EOL;

$socket = @socket_create(AF_INET6, SOCK_STREAM, SOL_TCP);
if ($socket === false)
{
  exit("- socket_create() failed: ".socket_strerror(socket_last_error()).PHP_EOL);
}
echo "- socket created".PHP_EOL;

$result = @socket_connect($socket, RECEIVER_ADDRESS, RECEIVER_PORT);
if ($result === false)
{
  exit("- socket_connect() failed: ".socket_strerror(socket_last_error($socket)).PHP_EOL);
}
echo "- connected to [".RECEIVER_ADDRESS."]:".RECEIVER_PORT.PHP_EOL;

$peer_address = "";
$peer_port = 0;

$peer = @socket_getpeername($socket, $peer_address, $peer_port);
if ($peer === false)
{
  exit("- socket_getpeername() failed: ".socket_strerror(socket_last_error($msgsock)).PHP_EOL);
}

$local_address = "";
$local_port = 0;

$local = @socket_getsockname($socket, $local_address, $local_port);
if ($local === false)
{
  exit("- socket_getsockname() failed: ".socket_strerror(socket_last_error($msgsock)).PHP_EOL);
}
echo "- for [".$peer_address."]:".$peer_port." bound on [".$local_address."]:".$local_port.PHP_EOL;

if (isset($argv[1]))
{
  $msg = $argv[1]; // message is the first parameter, for example "stop" to stop the receiver
}
else
{
  $msg = "This is PHP message sent at ".date("j.n.Y")." in ".date("G:i:s");
}
echo "|".$msg."|".PHP_EOL;

$msg_length = strlen($msg); 
$sent_length = @socket_send($socket, $msg, $msg_length, 0);
if ($sent_length === false)
{
  exit("- socket_send() failed: ".socket_strerror(socket_last_error($socket)).PHP_EOL);
}
echo "- message ".$sent_length."B of ".$msg_length."B sent".PHP_EOL;

socket_close($socket);
echo "- socket closed".PHP_EOL;

?>

 

  

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