mirror of https://github.com/aredn/aredn.git
90 lines
2.9 KiB
Lua
90 lines
2.9 KiB
Lua
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--[[
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Part of AREDN -- Used for creating Amateur Radio Emergency Data Networks
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Copyright (C) 2023 Tim Wilkinson
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See Contributors file for additional contributors
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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 version 3 of the License.
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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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Additional Terms:
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Additional use restrictions exist on the AREDN(TM) trademark and logo.
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See AREDNLicense.txt for more info.
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Attributions to the AREDN Project must be retained in the source code.
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If importing this code into a new or existing project attribution
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to the AREDN project must be added to the source code.
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You must not misrepresent the origin of the material contained within.
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Modified versions must be modified to attribute to the original source
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and be marked in reasonable ways as differentiate it from the original
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version
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--]]
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local wifiiface
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local IW = "/usr/sbin/iw"
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local ARPING = "/usr/sbin/arping"
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function station_monitor()
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if not string.match(get_ifname("wifi"), "^wlan") then
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exit_app()
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else
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wait_for_ticks(math.max(1, 120 - nixio.sysinfo().uptime))
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wifiiface = get_ifname("wifi")
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while true
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do
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run_station_monitor()
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wait_for_ticks(300) -- 5 minute
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end
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end
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end
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local logfile = "/tmp/station_monitor.log"
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if not file_exists(logfile) then
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io.open(logfile, "w+"):close()
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end
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local log = aredn.log.open(logfile, 8000)
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function run_station_monitor()
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-- Check each station to make sure we can broadcast and unicast to them
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arptable(
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function (entry)
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if entry.Device == wifiiface then
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local ip = entry["IP address"]
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local mac = entry["HW address"]
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if entry["Flags"] ~= "0x0" and ip and mac then
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-- Two arp pings - the first is broadcast, the second unicast
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for line in io.popen(ARPING .. " -c 2 -I " .. wifiiface .. " " .. ip):lines()
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do
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-- If we see exactly one response then we neeed to force the station to reassociate
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-- This indicates that broadcasts work, but unicasts dont
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if line:match("Received 1 response") then
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log:write("Unresponsive node: ip " .. ip .. ", mac " .. mac)
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log:flush()
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break
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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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)
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end
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return station_monitor
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