How to use pcap_breakloop?
I have a pcap_loop function in another function, that captures packets until the user stops it, i.e.
void functionA()
{
signal(SIGINT, terminate_process);
pcap_loop(handle, -1, callback, NULL);
...
}
void terminate_process(int signum)
{
pcap_breakloop(handle);
pcap_close(handle);
}
Is it possible to set a duration for when packets would be captured? Something like:
if (time(NULL) - start_time > 100)
pcap_breakloop(handle);
But I don't know where to put this, because so far all the examples I've seen used pcap_breakloop in a signal handler, which requires user intervention. How will the time condition be checked while pcap_loop is running?
Thank you.
Regard开发者_开发技巧s, Rayne
You can use alarm to generate a signal after a given number of seconds:
void functionA()
{
signal(SIGALRM, terminate_process);
alarm(100);
}
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