From: aidan@php.net
Operating system: N/A
PHP version: 4.3.7
PHP Bug Type: Sockets related
Bug description: fread "gready" behaviour
Description:
------------
When grabbing code with fread it exhibits "gready" behaviour. i.e. It does
not ignore packet boundaries.
We expect to get 6 packets when using fread 6 times. PHP currently joins
the packets together into 3 packets. I assume it keeps those packets
seperate because they have different source ips.
Reproduce code:
---------------
Tests run with: http://nopaste.php.cd/20417
Expected result:
----------------
With modified source, the expected result:
recv(3, "\377\377\377\377j\0", 8192, 0) = 6
recv(3, "\377\377\377\377j\0", 8192, 0) = 6
recv(7, "\377\377\377\377j\0", 8192, 0) = 6
recv(7, "\377\377\377\377j\0", 8192, 0) = 6
recv(8, "\377\377\377\377j\0", 8192, 0) = 6
recv(8, "\377\377\377\377j\0", 8192, 0) = 6
1 6
2 6
3 6
4 6
5 6
6 6
Actual result:
--------------
Strace:
recv(4, "\377\377\377\377j\0", 8192, 0) = 6
recv(4, "\377\377\377\377j\0", 8192, 0) = 6
recv(4, 0x82d3bfc, 8192, 0) = -1 EAGAIN (Resource temporarily
unavailable)
recv(8, "\377\377\377\377j\0", 8192, 0) = 6
recv(8, "\377\377\377\377j\0", 8192, 0) = 6
recv(8, 0x82dc984, 8192, 0) = -1 EAGAIN (Resource temporarily
unavailable)
recv(9, "\377\377\377\377j\0", 8192, 0) = 6
recv(9, "\377\377\377\377j\0", 8192, 0) = 6
recv(9, 0x82de994, 8192, 0) = -1 EAGAIN (Resource temporarily
unavailable)
PHP Script output: (packet + size)
1 12
2 12
3 12
--
Edit bug report at http://bugs.php.net/?id=28964&edit=1
--
Try a CVS snapshot (php4): http://bugs.php.net/fix.php?id=28964&r=trysnapshot4
Try a CVS snapshot (php5): http://bugs.php.net/fix.php?id=28964&r=trysnapshot5
Fixed in CVS: http://bugs.php.net/fix.php?id=28964&r=fixedcvs
Fixed in release: http://bugs.php.net/fix.php?id=28964&r=alreadyfixed
Need backtrace: http://bugs.php.net/fix.php?id=28964&r=needtrace
Need Reproduce Script: http://bugs.php.net/fix.php?id=28964&r=needscript
Try newer version: http://bugs.php.net/fix.php?id=28964&r=oldversion
Not developer issue: http://bugs.php.net/fix.php?id=28964&r=support
Expected behavior: http://bugs.php.net/fix.php?id=28964&r=notwrong
Not enough info: http://bugs.php.net/fix.php?id=28964&r=notenoughinfo
Submitted twice: http://bugs.php.net/fix.php?id=28964&r=submittedtwice
register_globals: http://bugs.php.net/fix.php?id=28964&r=globals
PHP 3 support discontinued: http://bugs.php.net/fix.php?id=28964&r=php3
Daylight Savings: http://bugs.php.net/fix.php?id=28964&r=dst
IIS Stability: http://bugs.php.net/fix.php?id=28964&r=isapi
Install GNU Sed: http://bugs.php.net/fix.php?id=28964&r=gnused
Floating point limitations: http://bugs.php.net/fix.php?id=28964&r=float