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-rw-r--r--utils/upgrade/upgrade-4-to-5.lua.in87
1 files changed, 87 insertions, 0 deletions
diff --git a/utils/upgrade/upgrade-4-to-5.lua.in b/utils/upgrade/upgrade-4-to-5.lua.in
new file mode 100644
index 0000000..28f800b
--- /dev/null
+++ b/utils/upgrade/upgrade-4-to-5.lua.in
@@ -0,0 +1,87 @@
+-- SPDX-License-Identifier: GPL-3.0-or-later
+
+local upg_dir = '@systemd_work_dir@/.upgrade-4-to-5'
+local out = upg_dir..'/kresd.conf.net'
+local sockets = {
+ { file='kresd.socket', kind='dns' },
+ { file='kresd-tls.socket', kind='tls' },
+ { file='kresd-doh.socket', kind='doh2' },
+ { file='kresd-webmgmt.socket', kind='webmgmt' },
+}
+
+-- globals
+addr_port = {}
+outfile = io.open(out, 'w')
+
+if outfile == nil then
+ -- this is technically an error, but upgrade script shouldn't fail in scriptlets
+ os.exit(0) -- make no changes and exit
+end
+
+outfile:write("-- Suggested network interface configuration\n")
+outfile:write("-- See https://knot-resolver.readthedocs.io/en/stable/upgrading.html\n\n")
+outfile:write("-- Please remove any unused or undesired interfaces and add them to\n")
+outfile:write("-- @etc_dir@/kresd.conf\n\n")
+
+local function write_net_listen(addr, port, kind)
+ -- make sure (addr, port) combination is unique
+ for _, val in ipairs(addr_port) do
+ if val.addr == addr and val.port == port then
+ return
+ end
+ end
+
+ table.insert(addr_port, { addr=addr, port=port })
+ outfile:write(
+ "net.listen('"..addr.."', "..tostring(port)..
+ ", { kind = '"..kind.."', freebind = true })\n")
+end
+
+local function convert(line, kind, ipv6only)
+ local patterns = {
+ '^[^=]+=(%d+%.%d+%.%d+%.%d+):(%d+)', -- IPv4
+ '^[^=]+=%[([^%]]+)%]:(%d+)', -- IPv6
+ '^[^=]+=(/.*)', -- UNIX
+ }
+
+ -- Datagram is either implied (dns) or unsupported (tls/doh/webmgmt)
+ if not line:match('^Listen.*Stream') then
+ return
+ end
+
+ for _, pattern in ipairs(patterns) do
+ local addr, port = line:match(pattern)
+ if addr ~= nil then
+ write_net_listen(addr, port, kind)
+ if not ipv6only then
+ if addr:match('^::$') then
+ write_net_listen('0.0.0.0', port, kind)
+ end
+ if addr:match('^::1$') then
+ write_net_listen('127.0.0.1', port, kind)
+ end
+ end
+ end
+ end
+ return
+end
+
+for _, socket in pairs(sockets) do
+ local ipv6only = false
+ local ipv6only_f = io.open(upg_dir..'/'..socket.file..'.v6only', 'r')
+ if ipv6only_f ~= nil then
+ ipv6only = true
+ io.close(ipv6only_f)
+ end
+ local sockinfo = io.open(upg_dir..'/'..socket.file, 'r')
+ if sockinfo ~= nil then
+ for line in sockinfo:lines() do
+ convert(line, socket.kind, ipv6only)
+ end
+ end
+end
+
+outfile:write("\n")
+
+io.close(outfile)
+os.exit(0)