#28964 [Opn->Csd]: fread "gready" behaviour

ID: 28964 Updated by: wez@php.net Reported By: aidan@php.net -Status: Open +Status: Closed Bug Type: Sockets related Operating System: N/A PHP Version: 4.3.7 New Comment: This bug has been fixed in CVS. Snapshots of the sources are packaged every three hours; this change will be in the next snapshot. You can grab the snapshot at http://snaps.php.net/. Thank you for the report, and for helping us make PHP better. Previous Comments: ------------------------------------------------------------------------ [2004-06-29 23:49:30] aidan@php.net 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 this bug report at http://bugs.php.net/?id=28964&edit=1