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Initiates a connection on a socket
(PHP 4 >= 4.0.7, PHP 5)
Examples ( Source code ) » socket_connect
Code Examples / Notes » socket_connect11-jul-2005 03:26
well this solution (above) is not right because you cant ping port...
w
man page for connect : EINPROGRESS The socket is non-blocking and the connection cannot be completed immediately. It is possible to select(2) or poll(2) for completion by selecting the socket for writing. After select indicates writability, use getsockopt(2) to read the SO_ERROR option at level SOL_SOCKET to determine whether connect completed successfully (SO_ERROR is zero) or unsuccessfully (SO_ERROR is one of the usual error codes listed here, explaining the reason for the failure). use socket_getoption($socket,SOL_SOCKET,SO_ERROR) . If you get value 115, it is connecting. If you get value different than 115 and 0, that means that an error has occured (see what error with socket_strerror()). However, I don't know how does that works under Windows, maybe it wont work at all. It is supposed to work under Linux (man pages said that). telefoontoestel
In reply to the function socket_raw_connect posted by "net_del at freemail dot ru". In the function you give a return value and afterwords you try to close the connection. That won't ever work. I think you want to alter your code ;-)
greg
If you're using non-blocking, be sure not to turn it on until after you connect, otherwise you will get the mesasge: PHP Warning: socket_connect() unable to connect [115]: Operation now in progress in file.php on line 123 and socket_connect() will return false (even though it will connect). scriptblue
If you do want to have a socket_connect operation timeout you can use the following code. <?php $sock = socket_create(AF_INET, SOCK_STREAM, SOL_TCP); socket_set_nonblock($sock); socket_connect($sock,"127.0.0.1", 80); socket_set_block($sock); switch(socket_select($r = array($sock), $w = array($sock), $f = array($sock), 5)) { case 2: echo "[-] Connection Refused\n"; break; case 1: echo "[+] Connected\n"; break; case 0: echo "[-] Timeout\n"; break; } ?> This basically makes socket_connect return immediately then you can use socket_select to see how the socket reacted. logan
I had the same problem with the timeout, and i applied this solution. It works only on linux PHP, i make a ping to the ip before connect the socket..... $address = gethostbyname ($ip); $command = "ping -c 1 " . $address; $r = exec($command); if ($r[0]=="r") { $socket = socket_create (AF_INET, SOCK_STREAM, 0); if ($socket < 0) { echo "socket_create() failed: reason: " . socket_strerror ($socket) . "\n"; } else { echo "OK.\n"; } seymour@itsyourdomain
here's how you can implement timeouts with the socket functions. this example works for blocking sockets but will work for both blocking and nonblocking with minor modifications. first call to connect in nonblocking mode returns 115 EINPROGRESS, additional calls return 114 EALREADY if the connection has not already failed or succeeded. once the connection succeeds, the socket resource will be returned. <? $host = "127.0.0.1"; $port = "80"; $timeout = 15; //timeout in seconds $socket = socket_create(AF_INET, SOCK_STREAM, SOL_TCP) or die("Unable to create socket\n"); socket_set_nonblock($socket) or die("Unable to set nonblock on socket\n"); $time = time(); while (!@socket_connect($socket, $host, $port)) { $err = socket_last_error($socket); if ($err == 115 || $err == 114) { if ((time() - $time) >= $timeout) { socket_close($socket); die("Connection timed out.\n"); } sleep(1); continue; } die(socket_strerror($err) . "\n"); } socket_set_block($this->socket) or die("Unable to set block on socket\n"); ?> net_del
function socket_raw_connect ($server, $port, $timeout,$request) { if (!is_numeric($port) or !is_numeric($timeout)) {return false;} $socket = fsockopen($server, $port, $errno, $errstr, $timeout); fputs($socket, $request); $ret = ''; while (!feof($socket)) { $ret .= fgets($socket, 4096); } return $ret; fclose($socket); } this code for easy raw connect. Comment by net_del[nkg] (www.nkg.ru) I am from russia. PHP is good language! |
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socket_accept socket_bind socket_clear_error socket_close socket_connect socket_create_listen socket_create_pair socket_create socket_get_option socket_getpeername socket_getsockname socket_last_error socket_listen socket_read socket_recv socket_recvfrom socket_select socket_send socket_sendto socket_set_block socket_set_nonblock socket_set_option socket_shutdown socket_strerror socket_write |
