Phil Martin wrote:
Many parts of this script were found at the following site:
http://www.sitepoint.com/article/udp-portscanning-php
This script isn't totally mine. I've just adapted it to my needs and it is
working quite well, telling me when a service is up or down ... read the
article for further details.
Anyway, my question was about concurrent script running. My script is
working the way I needed it to and all I need now is a way to fasten it. I
still think it's a little bit slow by many aspects, maybe because I'm not a
programmer and I've written a code that is not so good or fast, or there is
no way to have all my servers services checked in parallel.
Thanks in advance.
Felipe Martins
On 5/30/06, Jochem Maas <jochem@xxxxxxxxxxxxx> wrote:
Phil Martin wrote:
> Sure, sorry about that. I have a function that tells me if the host is
DOWN
> or UP. I want to run this function in parallel for each host I monitor.
The
> function is the following:
>
> function servstatus($remote_ip, $remote_ip_port, $remote_ip_proto) {
>
> if ($remote_ip_proto == "tcp") {
> $socket = socket_create(AF_INET, SOCK_STREAM, SOL_TCP);
>
> // Turning Off Warning Messages
> $i_error_old=error_reporting();
> error_reporting($i_error_old & ~ (E_WARNING));
>
> if ($connect = socket_connect($socket, "$remote_ip", "" .
> $remote_ip_port . "")) {
> return true;
the following 3 statements will never be run.
> socket_set_block($socket);
> socket_close($socket);
> unset($connect);
> } else {
> return false;
the following 3 statements will never be run.
> socket_set_nonblock($socket);
> socket_close($socket);
> unset($connect);}
my guess is you know even less about sockets, especially
blocking/non-blocking
than I do!
>
> } else {
why are you making the distinction between udp and tcp in this way?
>
> // Turning off Warning Messages
> $i_error_old=error_reporting();
> error_reporting($i_error_old & ~ (E_WARNING));
>
> $socket = fsockopen("udp://$remote_ip", "$remote_ip_port",
&$errno,
> &$errstr, 2);
> $timeout = 1;
>
> if (!$socket) {
if you don't get the socket why does that mean the service is up?
> return true;
> }
>
> socket_set_timeout ($socket, $timeout);
> $write = fwrite($socket,"\x00");
> if (!$write) {
again if you can't write why does that mean the service is up?
> return true;
> }
>
> $startTime = time();
> $header = fread($socket, 1);
> $endTime = time();
> $timeDiff = $endTime - $startTime;
>
> if ($timeDiff >= $timeout) {
why does a time measurement mean the service is up?
> fclose($socket);
> return true;
> } else {
> fclose($socket);
> return false;
> }
> }
> }
>
>
> Thanks in advance
>
> Felipe Martins
>
> On 5/30/06, Dave Goodchild <buddhamagnet@xxxxxxxxx> wrote:
>
>>
>>
>>
>> On 30/05/06, Phil Martin <darkinner.lists@xxxxxxxxx> wrote:
>> >
>> > Hi everyone,
>> >
>> > I've made a very basic and small function to suit my needs in
>> > monitoring some hosts services. I've noticed that the script is a
>> little
>> > bit
>> > slow because of the number of hosts and services to monitor. Is
there
a
>> > way
>> > to execute my function servstatus(); in parallel with every
hosts to
>> > increase the speed ?
>> > Thanks in advance.
>> >
>> > []'s
>> > Felipe Martins
>> >
>> >
>> Can you show us the function?
>>
>> --
>> http://www.web-buddha.co.uk
>>
>> dynamic web programming from Reigate, Surrey UK (php, mysql, xhtml,
css)
>>
>> look out for project karma, our new venture, coming soon!
>>
>
This is all in the manual...
Essentially you want pcntl_fork(), although you might want to use
something like stream_socket_pair() to do interprocess communication.
You should be able to find all the documentation and examples you need
in the manual in the pcntl and stream sections.
Regards, Adam Zey.
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