dynapoint: add new package (fixes #3304)
Dynapoint is a dynamic access point manager Signed-off-by: Tobias Ilte <tobias.ilte@campus.tu-berlin.de> Acked-by: Thomas Huehn <thomas.huehn@evernet-eg.de> - minor whitespace fixes/cleanups - squashed multiple commits into a single one before merge Signed-off-by: Michael Heimpold <mhei@heimpold.de>
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Michael Heimpold
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9cbc078e2c
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#
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# Copyright (C) 2016 Tobias Ilte <tobias.ilte@campus.tu-berlin.de>
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#
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# This is free software, licensed under the GNU General Public License v2.
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# See /LICENSE for more information.
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#
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include $(TOPDIR)/rules.mk
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PKG_NAME:=dynapoint
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PKG_RELEASE:=1
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PKG_MAINTAINER:=Tobias Ilte <tobias.ilte@campus.tu-berlin.de>
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PKG_LICENSE:=GPL-3.0+
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include $(INCLUDE_DIR)/package.mk
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define Package/$(PKG_NAME)
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SECTION:=net
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CATEGORY:=Network
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SUBMENU:=wireless
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DEPENDS:=+lua +libubus-lua +libuci-lua +libubox-lua +luci-lib-nixio
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TITLE:=Dynamic access point manager
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endef
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define Package/$(PKG_NAME)/description
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Dynapoint uses LUA scripts to allow dynamic access point creation
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and deletion depending on changes of certain network conditions.
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endef
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define Package/$(PKG_NAME)/conffiles
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/etc/config/dynapoint
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endef
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define Build/Compile
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endef
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define Package/$(PKG_NAME)/install
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$(INSTALL_DIR) $(1)/usr/sbin
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$(INSTALL_BIN) ./src/dynapoint.lua $(1)/usr/sbin/
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$(INSTALL_DIR) $(1)/etc/init.d
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$(INSTALL_BIN) ./src/dynapoint.init $(1)/etc/init.d/dynapoint
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$(INSTALL_DIR) $(1)/etc/config
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$(INSTALL_DATA) ./src/dynapoint.config $(1)/etc/config/dynapoint
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endef
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$(eval $(call BuildPackage,$(PKG_NAME)))
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config rule 'internet'
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list hosts 'http://www.example.com'
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list hosts 'http://www.google.com'
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option interval '60'
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option timeout '5'
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option offline_threshold '3'
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option add_hostname_to_ssid '0'
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option use_curl '0'
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option curl_interface 'eth0'
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#!/bin/sh /etc/rc.common
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START=99
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USE_PROCD=1
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PROG=/usr/sbin/dynapoint.lua
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CONFFILE=/etc/config/dynapoint
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start_service() {
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procd_open_instance
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procd_set_param command $PROG
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procd_set_param file $CONFFILE
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procd_set_param respawn
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procd_close_instance
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}
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@ -0,0 +1,203 @@
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#!/usr/bin/lua
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--[[
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Copyright (C) 2016 Tobias Ilte <tobias.ilte@campus.tu-berlin.de>
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This program is free software: you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation, either version 3 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>.
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--]]
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require "uci"
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require "ubus"
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require "uloop"
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log = require "nixio"
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--open sys-logging
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log.openlog("DynaPoint", "ndelay", "cons", "nowait");
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local uci_cursor = uci.cursor()
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-- get all config sections with the given type
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function getConfType(conf_file,type)
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local ifce={}
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uci_cursor:foreach(conf_file,type,function(s) ifce[s[".index"]]=s end)
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return ifce
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end
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ubus = ubus.connect()
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if not ubus then
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error("Failed to connect to ubusd")
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end
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ubus:call("network", "reload", {})
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local interval = uci_cursor:get("dynapoint", "internet", "interval")
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local timeout = uci_cursor:get("dynapoint", "internet", "timeout")
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local offline_threshold = tonumber(uci_cursor:get("dynapoint", "internet", "offline_threshold"))
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local hosts = uci_cursor:get("dynapoint", "internet", "hosts")
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local numhosts = #hosts
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local curl = tonumber(uci_cursor:get("dynapoint", "internet", "use_curl"))
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if (curl == 1) then
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curl_interface = uci_cursor:get("dynapoint", "internet", "curl_interface")
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end
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if (tonumber(uci_cursor:get("dynapoint", "internet", "add_hostname_to_ssid")) == 1 ) then
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localhostname = uci_cursor:get("system", "system", "hostname")
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end
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local table_names_rule = {}
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local table_names_not_rule = {}
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local ssids_with_hostname = {}
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local ssids_not_rule = {}
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function get_dynapoint_sections(t)
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for pos,val in pairs(t) do
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if (type(val)=="table") then
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get_dynapoint_sections(val);
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elseif (type(val)=="string") then
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if (pos == "dynapoint_rule") then
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if (val == "internet") then
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table_names_rule[#table_names_rule+1] = t[".name"]
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elseif (val == "!internet") then
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table_names_not_rule[#table_names_not_rule+1] = t[".name"]
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if (localhostname) then
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ssids_not_rule[#ssids_not_rule+1] = t[".ssid"]
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ssids_with_hostname[#ssids_with_hostname+1] = t[".ssid"].."_"..localhostname
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end
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end
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end
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end
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end
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end
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--print(table.getn(hosts))
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get_dynapoint_sections(getConfType("wireless","wifi-iface"))
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-- revert all non-persistent ssid uci-changes regarding sections affecting dynapoint
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for i = 1, #table_names_not_rule do
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uci_cursor:revert("wireless", table_names_not_rule[i], "ssid")
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end
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local online = true
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if (#table_names_rule > 0) then
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if (tonumber(uci_cursor:get("wireless", table_names_rule[1], "disabled")) == 1) then
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online = false
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end
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else
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log.syslog("info","Not properly configured. Please add <option dynapoint_rule 'internet'> to /etc/config/wireless")
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end
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local timer
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local offline_counter = 0
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uloop.init()
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function do_internet_check(host)
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if (curl == 1 ) then
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if (curl_interface) then
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result = os.execute("curl -s -m "..timeout.." --max-redirs 0 --interface "..curl_interface.." --head "..host.." > /dev/null")
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else
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result = os.execute("curl -s -m "..timeout.." --max-redirs 0 --head "..host.." > /dev/null")
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end
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else
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result = os.execute("wget -q --timeout="..timeout.." --spider "..host)
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end
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if (result == 0) then
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return true
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else
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return false
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end
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end
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function change_wireless_config(switch_to_offline)
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if (switch_to_offline == 1) then
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log.syslog("info","Switched to OFFLINE")
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for i = 1, #table_names_not_rule do
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uci_cursor:set("wireless",table_names_not_rule[i], "disabled", "0")
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if (localhostname) then
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uci_cursor:set("wireless", table_names_not_rule[i], "ssid", ssids_with_hostname[i])
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log.syslog("info","Bring up new AP "..ssids_with_hostname[i])
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else
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log.syslog("info","Bring up new AP "..ssids_not_rule[i])
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end
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end
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for i = 1, #table_names_rule do
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uci_cursor:set("wireless",table_names_rule[i], "disabled", "1")
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end
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else
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log.syslog("info","Switched to ONLINE")
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for i = 1, #table_names_not_rule do
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uci_cursor:set("wireless",table_names_not_rule[i], "disabled", "1")
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if (localhostname) then
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uci_cursor:set("wireless", table_names_not_rule[i], "ssid", ssids_not_rule[i])
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end
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end
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for i = 1, #table_names_rule do
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uci_cursor:set("wireless",table_names_rule[i], "disabled", "0")
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log.syslog("info","Bring up new AP "..uci_cursor:get("wireless", table_names_rule[i], "ssid"))
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end
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end
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uci_cursor:save("wireless")
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ubus:call("network", "reload", {})
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end
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local hostindex = 1
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function check_internet_connection()
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print("checking "..hosts[hostindex].."...")
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if (do_internet_check(hosts[hostindex]) == true) then
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-- online
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print("...seems to be online")
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offline_counter = 0
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hostindex = 1
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if (online == false) then
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print("changed state to online")
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online = true
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change_wireless_config(0)
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end
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else
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--offline
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print("...seems to be offline")
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hostindex = hostindex + 1
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if (hostindex <= numhosts) then
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check_internet_connection()
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else
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hostindex = 1
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-- and activate offline-mode
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print("all hosts offline")
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if (online == true) then
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offline_counter = offline_counter + 1
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if (offline_counter == offline_threshold) then
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print("changed state to offline")
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online = false
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change_wireless_config(1)
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end
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end
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end
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end
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timer:set(interval * 1000)
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end
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timer = uloop.timer(check_internet_connection)
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timer:set(interval * 1000)
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uloop.run()
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