Hello everyone here. This is my first post in this newsgroup, I hope I won't be to much off-topic. Feel free to redirect me to any better group. I am getting strange timing issues when failing to asynchronously connect sockets on closed or filtered ports, but I'm quite unsure if this is a PHP issue or my misunderstanding, as it seems that socket streams only wrap around <sys/socket.h>. I'm running the latest 5.2.5.5 Windows PHP build downloaded yesterday, running from the command line without any configuration changed from default. My code is at http://rafb.net/p/DEwN8J71.html with results at http://rafb.net/p/cnB4dC80.html Connecting to an open port seems consistent between synchronous and asynchronous sockets. Opening the socket is instantaneous, connection establishes in 0.17 seconds, and closing is fast. Connecting to a filtered port ends up with a socket timeout, but asynchronous socket closing blocks for 0.5 second which is quite huge. No network transfer was captured by Wireshark apart from the initial SYN packet. Connecting to a closed port with a synchronous socket times out, with several retries being sent after the server explicitly refused the connection with a RST ACK. Why doesn't it simply break after the first try ? Connecting to a closed port with an asynchronous socket takes the time of a single try, marking the stream as having had an except in stream_select after RST ACK was received. But here again, fclose()-ing the resource hangs for 0.5 second. Why is that an explicitly refused synchronous connection retries until timeout ? Why doesn't it cancel instantaneously ? Why is that closing a failed asynchronous socket takes so much time ? It is really losing a lot of asynchronous' interest if it hangs that long ? Note that if I don't explicitly fclose() the resources of failed asynchronous sockets, the same 0.5 seconds lag appears at the end of the script execution for each one. I guess PHP cleanly frees resources at shutdown, but it can reach several seconds when several sockets have failed. Is there another way than fclose() to clear asynchronous sockets ? Thank you for any advice. -- Nicolas Le Gland -- PHP General Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php
