Re: [PHP] Sockets 'requested address is not valid in its context'

[Miguel Cruz]

On Sat, 6 Jul 2002, Zac Hillier wrote:
 I'm opening a port on a remote machine presently I'm using fsockopen() which
 is fine for opening the port and sending data however I'm having trouble
 reading data back from the port.
 
 So I've considered using socket functions but do not appear to be able to
 get a connection. When I run the code below pointing to 127.0.0.1 everything
 runs fine however when I point to 192.168.123.193 (Another machine on the
 local network without a server running) I get these errors.

You can't bind to a socket on another machine. You have to bind the socket
to a local address (i.e., on your machine) and then either listen for
incoming connections or initiate an outbound connection from that socket.

miguel


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[PHP] Sockets 'requested address is not valid in its context'

[Zac Hillier]

Hi All,

I'm opening a port on a remote machine presently I'm using fsockopen() which
is fine for opening the port and sending data however I'm having trouble
reading data back from the port.

So I've considered using socket functions but do not appear to be able to
get a connection. When I run the code below pointing to 127.0.0.1 everything
runs fine however when I point to 192.168.123.193 (Another machine on the
local network without a server running) I get these errors.

Warning: socket_bind() unable to bind address [10049]: The requested address
is not valid in its context. in D:\php-dev\new.php on line 20
socket_bind() failed: reason: The requested address is not valid in its
context.

Warning: socket_listen() unable to listen on socket [10022]: An invalid
argument was supplied. in D:\php-dev\new.php on line 26
socket_listen() failed: reason: An invalid argument was supplied.


What does 'requested address is not valid in its context' mean?

Thanks

Zac


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 = 192.168.123.193;
$port = 5331;

if (($sock = socket_create(AF_INET, SOCK_STREAM, getprotobyname(TCP))) 
0) {
echo socket_create() failed: reason:  . socket_strerror ($sock) .
br;
} else {
 echo 'socketbr';
}

if (($ret = socket_bind($sock, $address, $port)) == false) {
echo socket_bind() failed: reason:  .
socket_strerror(socket_last_error($sock)) . br;
} else {
 echo 'bindbr';
}

if (($ret = socket_listen ($sock, 5)) == false) {
echo socket_listen() failed: reason:  .
socket_strerror(socket_last_error($sock)) . br;
} else {
 echo 'listenbr';
}


socket_close ($sock);
?


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