Adds the ne package ffpb-node-tuning to ffpb-packages.

As its name states, this packages applies some config optimizations
(like tweaking kernal knobs via sysctl) on the nodes.
For the most knobs Gluon sticks for OpenWRT defaults for good reasons,
as some values need to be set according to the environment of the
nodes (e.g. the network's size). As OpenWRT basically aims at provid-
ing a stable system for standalone WiFi access-points, the system's
default configuration may not be appropriate anymore the larger the
network grows, though.

ffpb/ffpb-node-tuning/Makefile

+include $(TOPDIR)/rules.mk
+
+PKG_NAME:=ffpb-node-tuning
+PKG_VERSION:=1
+PKG_RELEASE:=$(GLUON_VERSION).$(GLUON_SITE_CODE)-$(GLUON_RELEASE).$(GLUON_CONFIG_VERSION)
+
+PKG_BUILD_DIR := $(BUILD_DIR)/$(PKG_NAME)
+
+include $(INCLUDE_DIR)/package.mk
+
+define Package/ffpb-node-tuning
+  SECTION:=ffpb
+  CATEGORY:=Gluon
+  TITLE:=Freifunk Paderborn Node Tuning-Settings
+  DEPENDS:=+gluon-core +busybox
+  MAINTAINER:=Freifunk Paderborn <maschinenraum@paderborn.freifunk.net>
+  URL:=https://git.c3pb.de/freifunk-pb/ffpb-packages
+  SOURCE:=git@git.c3pb.de:freifunk-pb/ffpb-packages.git
+endef
+
+define Package/ffpb-node-tuning/description
+	As its name states, this packages applies some config optimizations (like
+	tweaking kernal knobs via sysctl) on the nodes.
+	For the most knobs Gluon sticks for OpenWRT defaults for good reasons, as
+	some values need to be set according to the environment of the nodes (e.g.
+	the network's size). As OpenWRT basically aims at providing a stable system
+	for standalone WiFi access-points, the system's default configuration may
+	not be appropriate anymore the larger the network grows, though.
+endef
+
+define Build/Prepare
+	mkdir -p $(PKG_BUILD_DIR)
+endef
+
+define Build/Configure
+endef
+
+define Build/Compile
+endef
+
+define Package/ffpb-node-tuning/postinst
+#!/bin/sh
+mkdir -p "$${IPKG_INSTROOT}/lib/gluon/version/"
+cd "$${IPKG_INSTROOT}/lib/gluon/version/"                                                                 
+echo $(PKG_VERSION)-$(PKG_RELEASE) > node-tuning
+exit 0
+endef
+
+define Package/ffpb-node-tuning/install
+	$(INSTALL_DIR) $(1)/etc/uci-defaults/
+	$(INSTALL_DIR) $(1)/lib/gluon/upgrade/node-tuning/invariant/
+	$(INSTALL_BIN) ./files/etc/uci-defaults/zz~-ffpb-upgrade $(1)/etc/uci-defaults/
+	$(INSTALL_BIN) ./files//lib/gluon/upgrade/node-tuning/invariant/010-arp_caches $(1)/lib/gluon/upgrade/node-tuning/invariant/
+	$(INSTALL_BIN) ./files//lib/gluon/upgrade/node-tuning/invariant/099-apply_settings $(1)/lib/gluon/upgrade/node-tuning/invariant/
+endef
+
+$(eval $(call BuildPackage,ffpb-node-tuning))

ffpb/ffpb-node-tuning/files/etc/uci-defaults/zz~-ffpb-upgrade

+#!/bin/sh
+
+
+UPGRADE_DIR=/lib/gluon/upgrade
+VERSION_DIR=/lib/gluon/version
+
+version_of() {
+	opkg status "ffpb-$1" | awk '/^Version: / { print $2 }'
+}
+
+oldversion_of() {
+	cat "$VERSION_DIR"/"$1" 2>/dev/null
+}
+
+do_dir() {
+	[ -d "$1" ] || return
+
+	local s
+	for s in "$1"/*; do "$s"; done
+}
+
+do_component() {
+	local component="$1"
+	local version="$(version_of "$component")"
+	[ "$version" ] || return
+
+	(
+		cd "$component"
+
+		local oldversion="$(oldversion_of "$component")"
+		if [ -z "$oldversion" ]; then
+			do_dir initial
+		fi
+
+		do_dir invariant
+
+		cd ..
+	)
+}
+
+
+cd "$UPGRADE_DIR"
+do_component core
+
+for component in *; do
+	[ "$component" != 'core' ] || continue
+	do_component "$component"
+done

ffpb/ffpb-node-tuning/files/lib/gluon/upgrade/node-tuning/invariant/010-arp_caches

+#!/usr/bin/lua
+
+local sysctl = require 'gluon.sysctl'
+
+sysctl.set('net.ipv4.neigh.default.gc_thresh1', 192)
+sysctl.set('net.ipv4.neigh.default.gc_thresh2', 640)
+sysctl.set('net.ipv4.neigh.default.gc_thresh3', 1280)
+sysctl.set('net.ipv6.neigh.default.gc_thresh1', 512)
+sysctl.set('net.ipv6.neigh.default.gc_thresh2', 1024)
+sysctl.set('net.ipv6.neigh.default.gc_thresh3', 1536)

ffpb/ffpb-node-tuning/files/lib/gluon/upgrade/node-tuning/invariant/099-apply_settings

+#!/usr/bin/lua
+
+os.execute('sync; sysctl -qp')