mirror of https://github.com/aredn/aredn.git
89 lines
2.6 KiB
Lua
Executable File
89 lines
2.6 KiB
Lua
Executable File
#!/usr/bin/lua
|
|
--[[
|
|
|
|
Part of AREDN® -- Used for creating Amateur Radio Emergency Data Networks
|
|
Copyright (C) 2023 Tim Wilkinson
|
|
See Contributors file for additional contributors
|
|
|
|
This program is free software: you can redistribute it and/or modify
|
|
it under the terms of the GNU General Public License as published by
|
|
the Free Software Foundation version 3 of the License.
|
|
|
|
This program is distributed in the hope that it will be useful,
|
|
but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
GNU General Public License for more details.
|
|
|
|
You should have received a copy of the GNU General Public License
|
|
along with this program. If not, see <http://www.gnu.org/licenses/>.
|
|
|
|
Additional Terms:
|
|
|
|
Additional use restrictions exist on the AREDN® trademark and logo.
|
|
See AREDNLicense.txt for more info.
|
|
|
|
Attributions to the AREDN® Project must be retained in the source code.
|
|
If importing this code into a new or existing project attribution
|
|
to the AREDN® project must be added to the source code.
|
|
|
|
You must not misrepresent the origin of the material contained within.
|
|
|
|
Modified versions must be modified to attribute to the original source
|
|
and be marked in reasonable ways as differentiate it from the original
|
|
version
|
|
|
|
--]]
|
|
|
|
require("uci")
|
|
require("aredn.olsr")
|
|
|
|
local dns_file = "/tmp/dnsmasq.d/supernode.conf"
|
|
|
|
local c = uci.cursor()
|
|
|
|
-- Supernodes themselves dont need supernode nameservers
|
|
if c:get("aredn", "@supernode[0]", "enable") == "1" then
|
|
os.exit(0)
|
|
end
|
|
|
|
-- Ignore supernodes?
|
|
if c:get("aredn", "@supernode[0]", "support") == "0" then
|
|
os.exit(0)
|
|
end
|
|
|
|
-- Find the closest supernode to use as a nameserver
|
|
local sn = {}
|
|
for _, hna in ipairs(aredn.olsr.getOLSRHNA())
|
|
do
|
|
if hna.genmask == 8 and hna.destination == "10.0.0.0" then
|
|
sn[hna.gateway] = true
|
|
end
|
|
end
|
|
local best = { destination = nil, etx = 99999999 }
|
|
for _, route in ipairs(aredn.olsr.getOLSRRoutes())
|
|
do
|
|
if sn[route.destination] and route.etx < best.etx then
|
|
best = route
|
|
end
|
|
end
|
|
if not best.destination then
|
|
os.exit(0)
|
|
end
|
|
|
|
-- Update the dns and restart network if necessary
|
|
local dns = "#" .. best.destination .. "\nserver=/local.mesh/" .. best.destination .. "\nrev-server=10.0.0.0/8," ..best.destination .. "\nrev-server=172.31.0.0/16," .. best.destination .. "\nrev-server=172.30.0.0/16," .. best.destination .. "\n"
|
|
local odns = ""
|
|
local f = io.open(dns_file)
|
|
if f then
|
|
odns = f:read("*a")
|
|
f:close()
|
|
end
|
|
if odns ~= dns then
|
|
f = io.open(dns_file, "w+")
|
|
if f then
|
|
f:write(dns)
|
|
f:close()
|
|
os.execute("/etc/init.d/dnsmasq restart")
|
|
end
|
|
end
|