Hi,

Question about Net::Pcap which may also be a general PERL question.
What I want to do is:
1. Capture a fixed number of ethernet packets
2. If the fixed number of ethernet packets doesn't arrive move on gracefully trapping the fact that they didn't arrive.

Here's my code attempt:
      eval {
         local $SIG{'ALRM'} = sub {Net::pcap::breakloop($$ref2pcap_mas
+ter);};
         alarm 10;
         # Capture two messages outgoing and incoming
         Net::Pcap::loop($$ref2pcap_master, 2, \&do_eth_init_process, 
+\$init_fail);
         alarm 0;
      };

[download]
Note: $$ref2pcap_master is my pcap object.

I've managed to get 1) to work i.e. my Net::Pcap callback function is called correctly, I'm happy with this.

My problem is catching the case when no packets arrive. The alarm() function doesn't seem to work for me i.e. I would have thought after 10 seconds if I didn't get two packets that I would have moved on because I call Net::Pcap::breakloop in the alarm signal function.

Apologies for my lack of terminology, i code FPGAs and design PCBs for a living, I am a PERL hacker in the true sense of the word "hack".

Thanks,
umballah.

In reply to Killing Net::pcap::loop by umballah

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