On Sat, Apr 16, 2011 at 03:49, YunQiang Su <wzss...@gmail.com> wrote:
> I got it.
>
> It used it like this
>
> #if !defined(__linux__)&&!defined(__APPLE__)
> {
> int immed = 1;
> if (ioctl(pfd_, BIOCIMMEDIATE, &immed) < 0) {
> fprintf(stderr,
> "warning: pcap/live (%s) couldn't set immed\n",
> name());
> perror("ioctl(BIOCIMMEDIATE)");
> }
> }
> #endif
>
> On linux , BIOCIMMEDIATE is not used, but on BSD, it did being used,
> but did *not* include net/bpf.h
>
> Then there are 2 ways to fix this bug:
> 1. also disable the above code block on BSD.
> 2. include net/bpf.h on BSD platform.
>
> Which one is better ?
> --
> YunQiang Su
>
I prefer to attempting to use this piece of code first. Because using
BIOCIMMEDIATE could very probably get some advantages over not using
them on kbsd platforms.
Here is a thread about it in freebsd-arch mailing list:
http://lists.freebsd.org/pipermail/freebsd-arch/2003-November/001446.html
> No. BIOCIMMEDIATE and non-blocking mode are different.
>
> BIOCIMMEDIATE mode means "make incoming packets
> readable immediately; don't buffer them up until either the
> store buffer is full or the timeout expires". This is for use in,
> for example, applications that are using BPF to implement
> network protocols, and want to be able to respond
> immediately to incoming packets, as opposed to, for
> example, packet capture applications (tcpdump, Ethereal,
> etc.) which don't necessarily need to immediately show or
> save incoming packets and which might want to try to get
> as many packets as possible per read on the BPF device.
--
Regards,
Aron Xu
--
To UNSUBSCRIBE, email to debian-bsd-requ...@lists.debian.org
with a subject of "unsubscribe". Trouble? Contact listmas...@lists.debian.org
Archive:
http://lists.debian.org/BANLkTimCNQ=9yfdrv25ajuez5k5rnfa...@mail.gmail.com
