tcpdump mailing list archives
Re: capturing on both interfaces simultaneously
From: Guy Harris <guy () alum mit edu>
Date: Sun, 11 Dec 2011 11:35:49 -0800
On Dec 11, 2011, at 11:17 AM, abhinav narain wrote:
What is "it"? Your program? Or just *some* program?Its the return statement of perror.
Presumably you were calling perror() because some call returned -1; what call was that? If something keeps returning -1 because, for example, it's a read from a non-blocking file descriptor on which no data is available to read, your program is going to be chewing up CPU looping.
It works fine now. But how do I know, how much packets is my program dropping? using pcap_stats ?
Yes.
I already have 15% RAM being eaten by the program, so I can't actually increase the buffer size to save packets in between select switches.
What is your program doing with the packets when it captures them?- This is the tcpdump-workers list. Visit https://cod.sandelman.ca/ to unsubscribe.
Current thread:
- Re: capturing on both interfaces simultaneously, (continued)
- Re: capturing on both interfaces simultaneously abhinav narain (Dec 10)
- Re: capturing on both interfaces simultaneously Cedric Cellier (Dec 10)
- Re: capturing on both interfaces simultaneously Guy Harris (Dec 11)
- Re: capturing on both interfaces simultaneously abhinav narain (Dec 11)
- Re: capturing on both interfaces simultaneously rixed (Dec 11)
- Re: capturing on both interfaces simultaneously abhinav narain (Dec 11)
- Re: capturing on both interfaces simultaneously rixed (Dec 11)
- Re: capturing on both interfaces simultaneously abhinav narain (Dec 11)
- Re: capturing on both interfaces simultaneously Guy Harris (Dec 11)
- Re: capturing on both interfaces simultaneously abhinav narain (Dec 11)
- Re: capturing on both interfaces simultaneously Guy Harris (Dec 11)
- Re: capturing on both interfaces simultaneously abhinav narain (Dec 11)
- Re: capturing on both interfaces simultaneously Guy Harris (Dec 11)
- Re: capturing on both interfaces simultaneously abhinav narain (Dec 11)
- Re: capturing on both interfaces simultaneously Gianluca Varenni (Dec 11)
- Re: capturing on both interfaces simultaneously abhinav narain (Dec 12)
- Re: capturing on both interfaces simultaneously Guy Harris (Dec 12)
- Re: capturing on both interfaces simultaneously abhinav narain (Dec 12)
- Re: capturing on both interfaces simultaneously Guy Harris (Dec 12)
- Re: capturing on both interfaces simultaneously dragorn (Dec 12)
- Re: capturing on both interfaces simultaneously Guy Harris (Dec 12)