faster to compile.

A small selection of packages was tested going from:

Executed in  696.30 secs   fish           external
   usr time   82.98 mins  395.00 micros   82.98 mins
   sys time    9.02 mins    0.00 micros    9.02 mins

to:

Executed in  592.20 secs   fish           external
   usr time   84.84 mins  361.00 micros   84.84 mins
   sys time    8.85 mins   57.00 micros    8.85 mins

Tested by running make -j 12 and wiping staging/build_dir/target_x

Signed-off-by: Rosen Penev <rosenp@gmail.com>

Add a hotplug script to reload nlbwmon's config after interface
ifup actions.

That should improve the detection of the IPv6 LAN address
that can get enabled a bit later in the boot process.

Signed-off-by: Hannu Nyman <hannu.nyman@iki.fi>

Signed-off-by: Huangbin Zhan <zhanhb88@gmail.com>

34a1887 nfnetlink: disable sequence number checking

Signed-off-by: Jo-Philipp Wich <jo@mein.io>

e757e06 nfnetlink: allow specifying the socket buffer size
33c77cb nfnetlink: properly handle nl_recvmsgs() failures
95cced5 protocol: Include whitespace when reading names

Signed-off-by: Jo-Philipp Wich <jo@mein.io>

e921ca0a Add further commonly used protocols to the protocol file.

Signed-off-by: DENG Qingfang <dengqf6@mail2.sysu.edu.cn>

Signed-off-by: Richard Yu <yurichard3839@gmail.com>

4574e6e nfnetlink: prevent tight retry loops
163a211 client: fix commit error information
21290db nlbwmon: merge existing data
abe701d database: do not overwrite unexpectedly preexisting databases
ef3fa58 socket: handle EAGAIN on send()

Ref: https://github.com/jow-/nlbwmon/issues/23
Ref: https://github.com/jow-/nlbwmon/issues/26
Ref: https://github.com/jow-/nlbwmon/issues/30
Signed-off-by: Jo-Philipp Wich <jo@mein.io>

Not all interfaces may have been allocated address at nlbwmon startup so
it may not collect statistics as expected/configured.

Add interface triggers to catch dhcp events and restart as required.

Signed-off-by: Kevin Darbyshire-Bryant <ldir@darbyshire-bryant.me.uk>

Update to latest Git HEAD in order to solve a number of issues.

 - Improves MAC address lookup reliability
 - Properly counts DNAT-ed connections (e.g. for port forwards)
 - Fixes stack corruption when parsing netlink records
 - Fixes deletion of gzipped databases

Signed-off-by: Jo-Philipp Wich <jo@mein.io>

Define package config files to preserve
/usr/share/nlbwmon/protocols across sysupgrade

Signed-off-by: Kevin Darbyshire-Bryant <kevin@darbyshire-bryant.me.uk>

Changes since last update:

32fc092 build: remove extraneous _GNU_SOURCE defines
096aaa3 build: compile with -D_GNU_SOURCE
76487b5 transform to source-only repository

Fixes build with uClibc and eglibc toolchains.

Signed-off-by: Jo-Philipp Wich <jo@mein.io>

This commit introduces nlbwmon, the lightweight NetLink BandWidth Montor.

The nlbwmon daemon gathers per-host traffic statistics by querying netlink
accounting data. Due to this approach, the executable is very small and does
not rely on libpcap and CPU intensive raw sockets to monitor traffic.

Besides raw per-host traffic counters, nlbwmon also support rudimentary
traffic classification by observing IP protocols and used port numbers.

Gathered accounting data is stored into a series of database files which
are regularily committed to persistent storage.

Refresh, commit and accounting intervals are freely configurable as well
as the layer7 protocol mapping rules and observed source subnets.

This package also bundles a cli client which can be used to dump the
gathered traffic data as JSON, CSV or plaintext data. A pull request to
add a graphical LuCI frontend for nlbwmon is pending.

Signed-off-by: Jo-Philipp Wich <jo@mein.io>