From: sy at yalcin dot us
Operating system: RHEL 4
PHP version: 5.2.4
PHP Bug Type: URL related
Bug description: fsockopen() hands due to slow firewall/dns response
Description:
------------
Firewall blocking or slowness in DNS causes fsockopen() hang, much more
than it should.This should return in 2 seconds. But it does not:
somedomain.localsite is not valid.
php -a
Interactive mode enabled
<?php
echo time()."\n";
$f = fsockopen('somedomain.localsite', 80, $tmp, $tmp, 2);
echo time()."\n";
var_dump($f);
1188857394
1188857426
bool(false)
Try with a unreachable IP, it returns as expected: (10.20.30.40 is not
valid)
php -a
Interactive mode enabled
<?php
echo time()."\n";
$f = fsockopen('10.20.30.40', 80, $tmp, $tmp, 2);
echo time()."\n";
var_dump($f);
1188857495
1188857497
bool(false)
This can be a firewall/dns issue. There is a very complicated firewall
installed here, which I don't know details yet.
It seems some packages are received, so that function does not time out as
expected. However it does not return because it waits for some other
packages.
Following is a google connection, it connects, but still not within 2
seconds. Socket handler is returned as if there is no delay!
php -a
Interactive mode enabled
<?php
echo time()."\n";
$f = fsockopen('www.google.com', 80, $tmp, $tmp, 2);
echo time()."\n";
var_dump($f);
1188857665
1188857681
resource(1) of type (stream)
Reproduce code:
---------------
Tested this with PHP 5.2.3 and does the same problem.
PHP is compiled with this:
./configure \
--with-config-file-path=/etc \
--enable-bcmath \
--with-bz2 \
--enable-calendar \
--enable-ftp \
--with-gettext \
--with-iconv \
--enable-mbstring=all \
--with-mysql \
--with-openssl \
--enable-sockets \
--enable-wddx \
--with-zlib \
--with-xmlrpc \
--enable-soap \
--enable-pcntl \
--enable-memory-limit \
--enable-force-cgi-redirect \
--disable-debug \
--enable-cgi \
--enable-fastcgi \
--enable-sysvsem \
--enable-sysvshm \
--enable-sysvmsg \
--enable-shmop \
--with-apxs2
Expected result:
----------------
I expect that fsockopen() will return back witin 2 seconds:
1) with FALSE return, means unsuccessful,
2) with a valid socket handler.
Any delay more than 2 seconds is not acceptable.
--
Edit bug report at http://bugs.php.net/?id=42537&edit=1
--
Try a CVS snapshot (PHP 4.4):
http://bugs.php.net/fix.php?id=42537&r=trysnapshot44
Try a CVS snapshot (PHP 5.2):
http://bugs.php.net/fix.php?id=42537&r=trysnapshot52
Try a CVS snapshot (PHP 6.0):
http://bugs.php.net/fix.php?id=42537&r=trysnapshot60
Fixed in CVS: http://bugs.php.net/fix.php?id=42537&r=fixedcvs
Fixed in release:
http://bugs.php.net/fix.php?id=42537&r=alreadyfixed
Need backtrace: http://bugs.php.net/fix.php?id=42537&r=needtrace
Need Reproduce Script: http://bugs.php.net/fix.php?id=42537&r=needscript
Try newer version: http://bugs.php.net/fix.php?id=42537&r=oldversion
Not developer issue: http://bugs.php.net/fix.php?id=42537&r=support
Expected behavior: http://bugs.php.net/fix.php?id=42537&r=notwrong
Not enough info:
http://bugs.php.net/fix.php?id=42537&r=notenoughinfo
Submitted twice:
http://bugs.php.net/fix.php?id=42537&r=submittedtwice
register_globals: http://bugs.php.net/fix.php?id=42537&r=globals
PHP 3 support discontinued: http://bugs.php.net/fix.php?id=42537&r=php3
Daylight Savings: http://bugs.php.net/fix.php?id=42537&r=dst
IIS Stability: http://bugs.php.net/fix.php?id=42537&r=isapi
Install GNU Sed: http://bugs.php.net/fix.php?id=42537&r=gnused
Floating point limitations: http://bugs.php.net/fix.php?id=42537&r=float
No Zend Extensions: http://bugs.php.net/fix.php?id=42537&r=nozend
MySQL Configuration Error: http://bugs.php.net/fix.php?id=42537&r=mysqlcfg
