aredn/files/etc/local/mesh-firewall/05-xlink

81 lines
3.5 KiB
Lua
Executable File

#! /usr/bin/lua
--[[
Part of AREDN -- Used for creating Amateur Radio Emergency Data Networks
Copyright (C) 2022 Tim Wilkinson
Original Perl Copyright (C) 2015 Conrad Lara
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(TM) 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("nixio")
require("uci")
if nixio.fs.stat("/etc/config.mesh/xlink") then
function nft_delete(list, query)
for line in io.popen("/usr/sbin/nft -a list chain ip fw4 " .. list):lines()
do
local handle = line:match(query .. "%s*# handle (%d+)")
if handle then
os.execute("/usr/sbin/nft delete rule ip fw4 " .. list .. " handle " .. handle)
return
end
end
end
uci.cursor("/etc/config.mesh"):foreach("xlink", "interface",
function(section)
local ifname = section.ifname
nft_delete("forward", "iifname \"" .. ifname .. "\".*jump forward_dtdlink")
nft_delete("input", "iifname \"" .. ifname .. "\".*jump input_dtdlink")
nft_delete("output", "oifname \"" .. ifname .. "\".*jump output_dtdlink")
nft_delete("accept_to_dtdlink", "oifname \"" .. ifname .. "\".*accept")
nft_delete("reject_to_dtdlink", "oifname \"" .. ifname .. "\".*reject")
nft_delete("reject_from_dtdlink", "iifname \"" .. ifname .. "\".*reject")
end
)
nft_delete("forward_dtdlink", "jump accept_to_dtdlink")
local addrule = false
uci.cursor("/etc/config.mesh"):foreach("xlink", "interface",
function(section)
local ifname = section.ifname
os.execute("/usr/sbin/nft insert rule ip fw4 forward iifname \"" .. ifname .. "\" jump forward_dtdlink")
os.execute("/usr/sbin/nft add rule ip fw4 input iifname \"" .. ifname .. "\" jump input_dtdlink")
os.execute("/usr/sbin/nft add rule ip fw4 output oifname \"" .. ifname .. "\" jump output_dtdlink")
os.execute("/usr/sbin/nft add rule ip fw4 accept_to_dtdlink oifname \"" .. ifname .. "\" accept")
os.execute("/usr/sbin/nft add rule ip fw4 reject_to_dtdlink oifname \"" .. ifname .. "\" reject")
os.execute("/usr/sbin/nft add rule ip fw4 reject_from_dtdlink iifname \"" .. ifname .. "\" reject")
addrule = true
end
)
if addrule then
os.execute("/usr/sbin/nft insert rule ip fw4 forward_dtdlink jump accept_to_dtdlink")
end
end