static-neighbor-reports: add package

Signed-off-by: David Bauer <mail@david-bauer.net>

net/static-neighbor-reports/Makefile

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+include $(TOPDIR)/rules.mk
+
+PKG_NAME:=static-neighbor-reports
+PKG_VERSION:=1
+PKG_RELEASE:=1
+
+PKG_MAINTAINER:=David Bauer <mail@david-bauer.net>
+PKG_LICENSE:=GPL-2.0-only
+
+include $(INCLUDE_DIR)/package.mk
+
+Build/Compile=
+
+define Package/static-neighbor-reports/Default
+endef
+
+define Package/static-neighbor-reports
+  SECTION:=net
+  CATEGORY:=Network
+  TITLE:=Configure static 802.11k neighbor reports
+  PKGARCH:=all
+  DEPENDS:=+libuci-lua +libubus-lua
+endef
+
+define Package/static-neighbor-reports/install
+	$(INSTALL_DIR) $(1)/etc/config
+	$(INSTALL_CONF) ./files/static-neighbor-report.conf $(1)/etc/config/static-neighbor-report
+	$(INSTALL_DIR) $(1)/etc/init.d
+	$(INSTALL_BIN) ./files/static-neighbor-reports.init $(1)/etc/init.d/static-neighbor-reports
+	$(INSTALL_DIR) $(1)/usr/lib
+	$(INSTALL_BIN) ./files/reload-neighbor-reports.lua $(1)/usr/lib/reload-neighbor-reports.lua
+endef
+
+define Package/static-neighbor-reports/conffiles
+/etc/config/static-neighbor-report
+endef
+
+define Package/static-neighbor-reports/description
+  Allows to configure static neighbor reports for hostapd interfaces.
+
+  These neighbor reports are avilable to clients using IEEE 802.11k.
+endef
+
+$(eval $(call BuildPackage,static-neighbor-reports))

net/static-neighbor-reports/README.md

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+# static-neighbor-reports
+The `static-neighbor-reports` package allows a user to configure static neighbor reports which
+are available for clients to be polled in case they support IEEE802.11k. This greatly improves
+the wireless experiences in terms of mobility.
+
+Make sure to enable `ieee80211k` for each VAP neighbor reports should be installed to.
+
+## Configuring
+The uci config name is `static-neighbor-report`. There's currently only the section
+type `neighbor`.
+
+### neighbor
+The followign options are supported for `neighbor` sections:
+
+#### neighbor_report
+This is the binary neighbor report element from a foreign AP. It is required for each neighbor.
+
+#### disabled
+Values other than `0` disable the neighbor. It won't be installed into hostapd in this case.
+If this option is missing, the neighbor is implicitly active.
+
+#### bssid
+The BSSID of the foreign AP. This option can usually be omitted, as it's implicitly present in
+the first 6 bytes of the binary neighbor report element.
+
+#### ssid
+The SSID of the foreign AP. This option can be omitted, in case it matches the SSID used on the local AP.
+
+#### iface
+Space seperated list of hostapd interfaces the neighbor should be installed to.
+
+## Retrieving neighbor information
+To retrieve the neighbor informations of an AP to be isntalled on a foreign AP, make sure the UCI option
+`ieee80211k` is set to `1` on the VAP.
+
+Execute `ubus call hostapd.<ifname> rrm_nr_get_own` on the AP. To get a list of all available interfaces,
+execute `ubus list`.
+
+The returned information  follows this format:
+
+```json
+{
+    "value": [
+        "<BSSID>",
+        "<SSID>",
+        "<Neighbot report element>"
+    ]
+}
+```

net/static-neighbor-reports/files/reload-neighbor-reports.lua

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+#!/usr/bin/lua
+
+local uci = require 'uci'.cursor()
+local ubus = require('ubus').connect()
+
+local neighbor_reports = {}
+
+local function hasKey(tab, key)
+	for k, _ in pairs(tab) do
+		if k == key then return true end
+	end
+	return false
+end
+
+uci:foreach('static-neighbor-report', 'neighbor', function (config)
+	if hasKey(config, "disabled") and config.disabled ~= '0' then
+		return
+	end
+
+	local bssid = ''
+	local ssid = ''
+	local neighbor_report = config['neighbor_report']
+
+	if hasKey(config, 'bssid') then bssid = config.bssid end
+	if hasKey(config, 'ssid') then ssid = config.ssid end
+
+	for iface in config.iface:gmatch("%S+") do
+		if not hasKey(neighbor_reports, iface) then
+			neighbor_reports[iface] = {}
+		end
+		table.insert(neighbor_reports[iface], {bssid, ssid, neighbor_report})
+	end
+end)
+
+for k, v in pairs(neighbor_reports) do
+	ubus:call('hostapd.' .. k, 'rrm_nr_set', {list=v})
+end

net/static-neighbor-reports/files/static-neighbor-report.conf

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+config neighbor ap1
+	option bssid 'f2:9e:c0:a5:a9:2c'
+	option ssid 'Network'
+	option neighbor_report 'f29ec0a5a92cff1900007a64090603016600'
+	option iface 'net0 net1'
+	option disabled '1'

net/static-neighbor-reports/files/static-neighbor-reports.init

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+#!/bin/sh /etc/rc.common
+
+START=60
+USE_PROCD=1
+
+start_service() {
+	procd_open_instance
+
+	procd_set_param command /usr/lib/reload-neighbor-reports.lua
+
+	procd_set_param stdout 1
+	procd_set_param stderr 1
+
+	procd_close_instance
+}
+
+reload_service() {
+	stop
+	start
+}
+
+service_triggers() {
+	procd_add_raw_trigger "hostapd.*" 3000 /etc/init.d/static-neighbor-reports restart
+}