Hello,
I am experimenting with the fsockopen function to send custom UDP packets.
What I would like to do is to be able to nominate the LOCAL port that my UDP
packet originates from. What happens currently is that when I execute my
code below I get a random port >1023 allocated. What I want to be able to do
is to fix the port to one that I specify.
The code below works and I can see my packet being sent out to destination
port 7077. The 192.168.2.10 server is also watching for the source port of
incoming traffic and will only respond if the source port is also 7077.
<?php
$fp = fsockopen("udp://192.168.2.10", 7077, $errno, $errstr);
if (!$fp) {
echo "ERROR: $errno - $errstr<br />\n";
} else {
fwrite($fp, "Test\n");
echo fread($fp, 26);
fclose($fp);
}
?>
Any ideas how I can achieve this?
Thanks,
Matt
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