Beefy Boxes and Bandwidth Generously Provided by pair Networks
Do you know where your variables are?

Checking if remote exists before calling send

( #170324=categorized question: print w/ replies, xml ) Need Help??
Contributed by Zombie bufo on May 30, 2002 at 07:04 UTC
Q&A  > network programming


I have an application which sends and receives messages down a number of sockets. If I call send to a socket where the pc on which I need to send the message to has crashed and is re-booting then the program crashes out. Is there any way in which I can check the status of the socket or remote machine before doing the send?

Answer: Checking if remote exists before calling send
contributed by rasta

I can advice you two solutions:

1. Use SO_KEEPALIVE socket option like in the following example:

use IO::Socket; my $sock = IO::Socket::INET->new('some_server'); $sock->read(1024,$data) until $sock->atmark;
2. You may use NetPacket::ICMP to check if remote host is alive.


  • Please read these before you post! —
            For:     Use:
    & &amp;
    < &lt;
    > &gt;
    [ &#91;
    ] &#93;
  • Log In?

    What's my password?
    Create A New User
    and the web crawler heard nothing...

    How do I use this? | Other CB clients
    Other Users?
    Others perusing the Monastery: (4)
    As of 2014-07-12 19:12 GMT
    Find Nodes?
      Voting Booth?

      When choosing user names for websites, I prefer to use:

      Results (240 votes), past polls