From: Remi Gacogne <remi.gacogne@powerdns.com>
Date: Wed, 9 Feb 2022 14:13:41 +0000 (+0100)
Subject: dnsdist: Add a Lua binding for the getResolvers() function
X-Git-Tag: dnsdist-1.8.0-rc1~285^2~2
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=bc462179fc0ec77b2307254229bc9dea2f853f06;p=thirdparty%2Fpdns.git

dnsdist: Add a Lua binding for the getResolvers() function
---

diff --git a/pdns/dnsdistdist/dnsdist-lua-bindings-network.cc b/pdns/dnsdistdist/dnsdist-lua-bindings-network.cc
index 2f60d3be2d..9f1b917270 100644
--- a/pdns/dnsdistdist/dnsdist-lua-bindings-network.cc
+++ b/pdns/dnsdistdist/dnsdist-lua-bindings-network.cc
@@ -82,4 +82,16 @@ void setupLuaBindingsNetwork(LuaContext& luaCtx, bool client)
 
     listener->start();
   });
+
+  luaCtx.writeFunction("getResolvers", [](const std::string& resolvConfPath) -> LuaArray<std::string> {
+    auto resolvers = getResolvers(resolvConfPath);
+    LuaArray<std::string> result;
+    result.reserve(resolvers.size());
+    int counter = 1;
+    for (const auto& resolver : resolvers) {
+      result.emplace_back(counter, resolver.toString());
+      counter++;
+    }
+    return result;
+  });
 };
diff --git a/pdns/dnsdistdist/docs/reference/config.rst b/pdns/dnsdistdist/docs/reference/config.rst
index 99c4e14593..1ad86fcf3b 100644
--- a/pdns/dnsdistdist/docs/reference/config.rst
+++ b/pdns/dnsdistdist/docs/reference/config.rst
@@ -1695,6 +1695,14 @@ These values can be set at configuration time via:
 Other functions
 ---------------
 
+.. function:: getResolvers(path)
+
+  .. versionadded:: 1.8.0
+
+  This function can be used to get a Lua table of name servers from a file in the resolv.conf format.
+
+  :param str path: The path to the file, usually /etc/resolv.conf
+
 .. function:: maintenance()
 
   If this function exists, it is called every second to do regular tasks.