> -----Original Message----- > From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]] > Sent: Wednesday, January 16, 2002 4:01 PM > To: Perl Discuss > Subject: verifying if a server is listening on a port > > > i am hoping to use perl to verify whether a remote machine is > listening on > UDP/69. i've found some examples, and modified them slightly > to come up > with the attached snippet of code. the output always seems to > be that the > "port is up". i am imagining that $disconn is never being set to true > since the $checkport will always at least attempt a connection. > > maybe my reasoning to that is incorrect, but i guess, that is > why i am > writing :) any help is appreciated. thanks -charles
connect() on a SOCK_DGRAM (UDP) socket doesn't really "do" anything; it just caches the address for future calls to send(). Since UDP does not guarantee delivery, you have to send a message and get a response from the server according to some higher-level protocol. -- To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
