Snort mailing list archives
[PATCH 2/2] daq_nfq: avoid uneeded -ENOBUFS on queue overrun
From: Florian Westphal <fwestphal () astaro com>
Date: Fri, 29 Apr 2011 14:36:05 +0200
netlink signals event queue overflows by returning -ENOBUFS to userspace. daq_nfq does not need to care about this, so ignore ENOBUFS and tell the kernel to not notify us in the first place. --- os-daq-modules/daq_nfq.c | 5 +++++ 1 files changed, 5 insertions(+), 0 deletions(-) diff --git a/os-daq-modules/daq_nfq.c b/os-daq-modules/daq_nfq.c index d55e9d6..55ac811 100644 --- a/os-daq-modules/daq_nfq.c +++ b/os-daq-modules/daq_nfq.c @@ -338,6 +338,11 @@ static int nfq_daq_initialize ( } } + // tell kernel that we do not need to know about queue overflows. + // Without this, read operations on the netlink socket will fail + // with ENOBUFS on queue overrun. + setsockopt(impl->sock, SOL_NETLINK, NETLINK_NO_ENOBUFS, &(int){1}, + sizeof(int)); impl->state = DAQ_STATE_INITIALIZED; *handle = impl; -- 1.7.3.4 ------------------------------------------------------------------------------ WhatsUp Gold - Download Free Network Management Software The most intuitive, comprehensive, and cost-effective network management toolset available today. Delivers lowest initial acquisition cost and overall TCO of any competing solution. http://p.sf.net/sfu/whatsupgold-sd _______________________________________________ Snort-devel mailing list Snort-devel () lists sourceforge net https://lists.sourceforge.net/lists/listinfo/snort-devel
Current thread:
- [PATCH 1/2] daq_nfq: snort defines its timeout in milliseconds, not seconds Florian Westphal (Apr 29)
- [PATCH 2/2] daq_nfq: avoid uneeded -ENOBUFS on queue overrun Florian Westphal (Apr 29)
- Re: [PATCH 2/2] daq_nfq: avoid uneeded -ENOBUFS on queue overrun Russ Combs (Apr 29)
- Re: [PATCH 1/2] daq_nfq: snort defines its timeout in milliseconds, not seconds Russ Combs (Apr 29)
- [PATCH 2/2] daq_nfq: avoid uneeded -ENOBUFS on queue overrun Florian Westphal (Apr 29)