Re: Socket connection issue

On Sat, 4 Apr 2009 15:23:30 +0200, "mijn naam"
<whatever@xxxxxxxxxxxxxxx> wrote:

"Martin" <ironwoodcanyon@xxxxxxxxx> schreef in bericht
news:1gtct4pqbvd697imn50urh7p4eqd5tchkk@xxxxxxxxxx
I have the following code being used in several of my PHP scripts
(it's in an include file). It opens a socket connection to a process
that's running on the same computer that IIS/PHP is running on. The OS
is Windows XPPro. This all works fine - no problems.

$portnum = 1001;
$address = $_SERVER['SERVER_NAME'];
$socket = @fsockopen($address, $portnum, $errno, $errstr, 2);

I copied the scripts over to another computer that's running IIS/PHP
in Windows XPPro - an identical setup. However, the socket fails to
connect. After some experimentation, I discovered that if I used the
server's IP address instead of the $_SERVER['SERVER_NAME'] variable,
then the socket connects just fine.

I assume with "the server's IP address" you mean the address of that other
server, the one you copied your scripts to.

Chances are you are not able to connect to IP address 127.0.0.1 either. If
so, $_SERVER['SERVER_NAME'] is not part of the problem, nor is 'localhost',
your host file, etc.

It is normal that a process (including PHP) cannot connect to a port which
is not listening.

Use netstat to see if your end point is listening on address 127.0.0.1, for
instance using (from a cmd.exe prompt):
netstat -a -n -p tcp

Perhaps the process is listening to all IP addresses (0.0.0.0) on one
computer, and only to one or some addresses (but not 127.0.0.1) on the other
?

If this is indeed the case, then your problem is not PHP related. You need
to find out why that other process is not listening on localhost.

OK - using netstat, I checked out both computers. Here again, they
both seem to be operating identically. (I added "-b" to the netstat
command to show the process names.)

On BOTH computers, netstat shows MyProcess.exe is listening on
0.0.0.0:1001

FWIW, both computers show that a process named alg.exe is listening on
127.0.0.1:1028

Any thoughts?


.

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