87 lines
2.3 KiB
Lua
87 lines
2.3 KiB
Lua
-- SPDX-License-Identifier: GPL-3.0-or-later
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local upg_dir = '@systemd_work_dir@/.upgrade-4-to-5'
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local out = upg_dir..'/kresd.conf.net'
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local sockets = {
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{ file='kresd.socket', kind='dns' },
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{ file='kresd-tls.socket', kind='tls' },
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{ file='kresd-doh.socket', kind='doh2' },
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{ file='kresd-webmgmt.socket', kind='webmgmt' },
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}
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-- globals
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addr_port = {}
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outfile = io.open(out, 'w')
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if outfile == nil then
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-- this is technically an error, but upgrade script shouldn't fail in scriptlets
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os.exit(0) -- make no changes and exit
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end
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outfile:write("-- Suggested network interface configuration\n")
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outfile:write("-- See https://knot-resolver.readthedocs.io/en/stable/upgrading.html\n\n")
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outfile:write("-- Please remove any unused or undesired interfaces and add them to\n")
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outfile:write("-- @etc_dir@/kresd.conf\n\n")
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local function write_net_listen(addr, port, kind)
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-- make sure (addr, port) combination is unique
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for _, val in ipairs(addr_port) do
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if val.addr == addr and val.port == port then
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return
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end
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end
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table.insert(addr_port, { addr=addr, port=port })
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outfile:write(
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"net.listen('"..addr.."', "..tostring(port)..
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", { kind = '"..kind.."', freebind = true })\n")
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end
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local function convert(line, kind, ipv6only)
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local patterns = {
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'^[^=]+=(%d+%.%d+%.%d+%.%d+):(%d+)', -- IPv4
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'^[^=]+=%[([^%]]+)%]:(%d+)', -- IPv6
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'^[^=]+=(/.*)', -- UNIX
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}
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-- Datagram is either implied (dns) or unsupported (tls/doh/webmgmt)
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if not line:match('^Listen.*Stream') then
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return
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end
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for _, pattern in ipairs(patterns) do
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local addr, port = line:match(pattern)
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if addr ~= nil then
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write_net_listen(addr, port, kind)
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if not ipv6only then
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if addr:match('^::$') then
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write_net_listen('0.0.0.0', port, kind)
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end
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if addr:match('^::1$') then
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write_net_listen('127.0.0.1', port, kind)
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end
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end
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end
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end
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return
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end
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for _, socket in pairs(sockets) do
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local ipv6only = false
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local ipv6only_f = io.open(upg_dir..'/'..socket.file..'.v6only', 'r')
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if ipv6only_f ~= nil then
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ipv6only = true
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io.close(ipv6only_f)
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end
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local sockinfo = io.open(upg_dir..'/'..socket.file, 'r')
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if sockinfo ~= nil then
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for line in sockinfo:lines() do
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convert(line, socket.kind, ipv6only)
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end
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end
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end
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outfile:write("\n")
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io.close(outfile)
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os.exit(0)
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