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Checking if remote exists before calling send

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Contributed by Zombie bufo on May 30, 2002 at 07:04 UTC
Q&A  > network programming


Description:

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.

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