This patch fixes the collision issue observed on an intensive network
trafic. When there is fragmentation it is the case for all data
exchanged between two hosts. Thus using a hash func only involving
IP addresses (and protocol) was leading to a collision for all
exchanges between the hosts. At a larger scale, it was resulting in
a packet loss. By using the IP ID instead of the protocol family, we
introduce a real difference between the trackers.
This patch renamed the 'worker' running mode into 'workers'. Thus,
there is only one name in Suricata for the same thing. Backward
compatibility is ensured by replacing "worker" by "workers" when
the old name is used. A warning is printed in the log when the old
name is used.
clang was issuing some warnings related to unused return in function.
This patch adds some needed error treatment and ignore the rest of the
warnings by adding a cast to void.
This patch adds counters for kernel drops and accepts to af-packet
capture module. This information are periodically displayed in
stats.log:
capture.kernel_packets | RxAFP1 | 1792
capture.kernel_drops | RxAFP1 | 0
The statistic is fetch via a setsockopt call every 255 packets.
This patch adds support for BPF in AF_PACKET running
mode. The command line syntax is the same as the one
used of PF_RING.
The method is the same too: The pcap_compile__nopcap()
function is used to build the BPF filter. It is then
injected into the kernel with a setsockopt() call. If
the adding of the BPF fail, suricata exit.
This patch will allow us to use the datalink when computing the filter.
It also fixes a potential issue where an interface data type change
after the interface if going down/up.