ffda-wireless-rate-limiter: add package

This adds a package which can be used to shape traffic on the wireless
interfaces interface-wide or per-client.

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

ffda-wireless-rate-limiter/Makefile

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+include $(TOPDIR)/rules.mk
+
+PKG_NAME:=ffda-wireless-rate-limiter
+PKG_RELEASE:=1
+
+PKG_SOURCE_PROTO:=git
+PKG_SOURCE_URL=https://github.com/blocktrron/wireless-rate-limiter.git
+PKG_SOURCE_DATE:=2024-08-24
+PKG_SOURCE_VERSION:=1fedb08ba7ce347d5c3f7c8ddcac8a5e2f5d14b6
+
+PKG_MAINTAINER:=David Bauer <mail@david-bauer.net>
+PKG_LICENSE:=GPL-2.0
+
+include $(TOPDIR)/../package/gluon.mk
+include $(INCLUDE_DIR)/cmake.mk
+
+CMAKE_SOURCE_SUBDIR:=src
+
+define Package/ffda-wireless-rate-limiter
+  TITLE:=Wireless rate-limiter
+  DEPENDS:=+libubox +libubus +libblobmsg-json +tc +kmod-sched-core +kmod-ifb +gluon-core
+endef
+
+define Package/ffda-wireless-rate-limiter/description
+  Package to impose per-interface and per-client rate limits on a wireless interface
+endef
+
+define Package/ffda-wireless-rate-limiter/conffiles
+/etc/config/wireless-rate-limiter
+endef
+
+define Package/ffda-wireless-rate-limiter/install
+	$(INSTALL_DIR) $(1)/usr/bin $(1)/etc/init.d $(1)/etc/config $(1)/lib/wireless-rate-limiter $(1)/lib/gluon/upgrade
+
+	$(INSTALL_BIN) $(PKG_BUILD_DIR)/wireless-rate-limiter $(1)/usr/bin/wireless-rate-limiter
+
+	$(INSTALL_BIN) $(PKG_BUILD_DIR)/openwrt/wireless-rate-limiter/files/wireless-rate-limiter.init $(1)/etc/init.d/wireless-rate-limiter
+
+	$(CP) $(PKG_BUILD_DIR)/openwrt/wireless-rate-limiter/files/wireless-rate-limiter.uci $(1)/etc/config/wireless-rate-limiter
+
+	$(CP) $(PKG_BUILD_DIR)/openwrt/wireless-rate-limiter/files/htb-shared.sh $(1)/lib/wireless-rate-limiter/htb-shared.sh
+	$(INSTALL_BIN) $(PKG_BUILD_DIR)/openwrt/wireless-rate-limiter/files/htb-client.sh $(1)/lib/wireless-rate-limiter/htb-client.sh
+	$(INSTALL_BIN) $(PKG_BUILD_DIR)/openwrt/wireless-rate-limiter/files/htb-netdev.sh $(1)/lib/wireless-rate-limiter/htb-netdev.sh
+
+	$(INSTALL_BIN) ./files/wireless-rate-limiter.upgrade.lua $(1)/lib/gluon/upgrade/880-wireless-rate-limiter
+endef
+
+$(eval $(call BuildPackageGluon,ffda-wireless-rate-limiter))

ffda-wireless-rate-limiter/README.md

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+# ffda-wireless-rate-limiter
+
+This package provides a rate-limiter which can shape traffic per client
+and per interface. The limit is user-configurable and defaults can be
+applied and updated via the site-config.
+
+## Examples
+### Site
+
+Below you can see an example of how to configure the rate-limiter
+in the site-configuration.
+
+Each client is shaped to a different rate.
+
+ - On 5 GHz, only the uplink will be shaped.
+ - On 2.4 GHz, both uplink and downlink will be shaped. Additionally,
+   all traffic on the 2.4 GHz radios will each be shaped to a maximum
+   of 10 Mbit/s downlink and 5 Mbit/s uplink.
+
+When using OWE, the limits are imposed for the unencrypted and OWE network
+indepedently.
+
+```lua
+wifi24 = {
+	channel = 5, -- 2432 MHz
+
+	rate_limit = {
+		client = {
+			down = 6000, -- 6 Mbit/s
+			up = 3000, -- 3 Mbit/s
+		},
+		iface = {
+			down = 10000, -- 10 Mbit/s
+			up = 5000, -- 5 Mbit/s
+		},
+	},
+
+	mesh = {
+		mcast_rate = 12000,
+	},
+},
+wifi5 = {
+	channel = 48, -- 5230 MHz
+	outdoor_chanlist = '96-116 132-140',
+
+	rate_limit = {
+		client = {
+			up = 6000, -- 6 Mbit/s
+		},
+	},
+
+	mesh = {
+		mcast_rate = 12000,
+	},
+},
+```
+
+### UCI
+
+The rate-limiter can also be configured via UCI. The following example is
+for a configuration which is equivalent to the site-configuration above.
+
+Take note however: If you intend to remove
+limits imposed by the site-configuration, you need to set the values to
+`0` instead of removing the sections.
+
+```sh
+uci set gluon.rate_limit_2g=ffda-rate-limit
+uci set gluon.rate_limit_2g.band='2g'
+uci set gluon.rate_limit_2g.client_down=6000
+uci set gluon.rate_limit_2g.client_up=3000
+uci set gluon.rate_limit_2g.iface_down=10000
+uci set gluon.rate_limit_2g.iface_up=5000
+
+uci set gluon.rate_limit_5g=ffda-rate-limit
+uci set gluon.rate_limit_5g.band='5g'
+uci set gluon.rate_limit_5g.client_down=0
+uci set gluon.rate_limit_5g.client_up=2000
+uci set gluon.rate_limit_5g.iface_down=10000
+uci set gluon.rate_limit_5g.iface_up=5000
+
+uci commit gluon
+```

ffda-wireless-rate-limiter/files/wireless-rate-limiter.upgrade.lua

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+#!/usr/bin/lua
+
+local uci = require('simple-uci').cursor()
+local wireless = require('gluon.wireless')
+
+local function get_uci_section_for_band(band)
+	local section_name = nil
+	uci:foreach('gluon', 'ffda-rate-limit', function(section)
+		if section.band == band then
+			section_name = section['.name']
+		end
+	end)
+
+	return section_name
+end
+
+local function get_user_limit(band, limit_type)
+	local uci_section = get_uci_section_for_band(band)
+	if uci_section then
+		return uci:get('gluon', uci_section, limit_type)
+	end
+
+	return nil
+end
+
+local function wireless_limits_get()
+	local output_limits = {}
+	wireless.foreach_radio(uci, function(radio, _, site_config)
+		local radio_band = radio.band
+		local radio_index = radio['.name']:match('^radio(%d+)$')
+
+		local limit_table = {
+			client = {
+				up = {
+					['user'] = get_user_limit(radio_band, 'client_up'),
+					['site'] = site_config.rate_limit.client.up(0)
+				},
+				down = {
+					['user'] = get_user_limit(radio_band, 'client_down'),
+					['site'] = site_config.rate_limit.client.down(0)
+				}
+			},
+			iface = {
+				up = {
+					['user'] = get_user_limit(radio_band, 'iface_up'),
+					['site'] = site_config.rate_limit.up(0)
+				},
+				down = {
+					['user'] = get_user_limit(radio_band, 'iface_down'),
+					['site'] = site_config.rate_limit.down(0)
+				}
+			}
+		}
+
+		output_limits[radio_band] = {
+			index = radio_index,
+			limits = {
+				client = {
+					up = limit_table.client.up.user or limit_table.client.up.site,
+					down = limit_table.client.down.user or limit_table.client.down.site
+				},
+				iface = {
+					up = limit_table.iface.up.user or limit_table.iface.up.site,
+					down = limit_table.iface.down.user or limit_table.iface.down.site
+				}
+			},
+		}
+	end)
+
+	return output_limits
+end
+
+local function wireless_limits_set(index, limits)
+	local limit_applied = false
+	for type_key, type_value in pairs(limits) do
+		local limit_down = type_value.down
+		local limit_up = type_value.up
+
+		for _, iface_type in ipairs({'client', 'owe'}) do
+			local section_name = type_key .. '_limit_' .. iface_type .. index
+
+			uci:delete('wireless-rate-limiter', section_name)
+
+			if limit_down ~= 0 or limit_up ~= 0 then
+				local section_type = type_key == 'client' and 'limit-client' or 'limit-interface'
+				uci:section('wireless-rate-limiter', section_type, section_name, {
+					interface = iface_type .. index,
+					download = limit_down,
+					upload = limit_up,
+					disabled = 0
+				})
+
+				limit_applied = true
+			end
+		end
+	end
+
+	return limit_applied
+end
+
+-- Delete existing config
+uci:delete_all('wireless-rate-limiter', 'limit-client')
+uci:delete_all('wireless-rate-limiter', 'limit-interface')
+
+-- Apply config
+local limits = wireless_limits_get()
+local limits_applied = false
+for _, value in pairs(limits) do
+	if wireless_limits_set(value.index, value.limits) then
+		limits_applied = true
+	end
+end
+
+-- Decide daemon necessity
+uci:set('wireless-rate-limiter', 'core', 'disabled', not limits_applied)
+
+-- Save
+uci:commit('wireless-rate-limiter')
+
+return 0