From 4fc2f55f761d71aae1f145d5aa94ba929cc39676 Mon Sep 17 00:00:00 2001
From: Daniel Baumann <daniel.baumann@progress-linux.org>
Date: Sun, 28 Apr 2024 11:34:30 +0200
Subject: Adding upstream version 1.7.3.

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
---
 dnsdist-lua-bindings.cc | 624 ++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 624 insertions(+)
 create mode 100644 dnsdist-lua-bindings.cc

(limited to 'dnsdist-lua-bindings.cc')

diff --git a/dnsdist-lua-bindings.cc b/dnsdist-lua-bindings.cc
new file mode 100644
index 0000000..e0abed5
--- /dev/null
+++ b/dnsdist-lua-bindings.cc
@@ -0,0 +1,624 @@
+/*
+ * This file is part of PowerDNS or dnsdist.
+ * Copyright -- PowerDNS.COM B.V. and its contributors
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of version 2 of the GNU General Public License as
+ * published by the Free Software Foundation.
+ *
+ * In addition, for the avoidance of any doubt, permission is granted to
+ * link this program with OpenSSL and to (re)distribute the binaries
+ * produced as the result of such linking.
+ *
+ * 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, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ */
+#include "config.h"
+#include "dnsdist.hh"
+#include "dnsdist-lua.hh"
+#include "dnsdist-svc.hh"
+
+#include "dolog.hh"
+
+void setupLuaBindings(LuaContext& luaCtx, bool client)
+{
+  luaCtx.writeFunction("infolog", [](const string& arg) {
+      infolog("%s", arg);
+    });
+  luaCtx.writeFunction("errlog", [](const string& arg) {
+      errlog("%s", arg);
+    });
+  luaCtx.writeFunction("warnlog", [](const string& arg) {
+      warnlog("%s", arg);
+    });
+  luaCtx.writeFunction("show", [](const string& arg) {
+      g_outputBuffer+=arg;
+      g_outputBuffer+="\n";
+    });
+
+  /* Exceptions */
+  luaCtx.registerFunction<string(std::exception_ptr::*)()const>("__tostring", [](const std::exception_ptr& eptr) {
+      try {
+        if (eptr) {
+          std::rethrow_exception(eptr);
+        }
+      } catch(const std::exception& e) {
+        return string(e.what());
+      } catch(const PDNSException& e) {
+        return e.reason;
+      } catch(...) {
+        return string("Unknown exception");
+      }
+      return string("No exception");
+    });
+  /* ServerPolicy */
+  luaCtx.writeFunction("newServerPolicy", [](string name, ServerPolicy::policyfunc_t policy) { return std::make_shared<ServerPolicy>(name, policy, true);});
+  luaCtx.registerMember("name", &ServerPolicy::d_name);
+  luaCtx.registerMember("policy", &ServerPolicy::d_policy);
+  luaCtx.registerMember("ffipolicy", &ServerPolicy::d_ffipolicy);
+  luaCtx.registerMember("isLua", &ServerPolicy::d_isLua);
+  luaCtx.registerMember("isFFI", &ServerPolicy::d_isFFI);
+  luaCtx.registerMember("isPerThread", &ServerPolicy::d_isPerThread);
+  luaCtx.registerFunction("toString", &ServerPolicy::toString);
+  luaCtx.registerFunction("__tostring", &ServerPolicy::toString);
+
+  ServerPolicy policies[] = {
+    ServerPolicy{"firstAvailable", firstAvailable, false},
+    ServerPolicy{"roundrobin", roundrobin, false},
+    ServerPolicy{"wrandom", wrandom, false},
+    ServerPolicy{"whashed", whashed, false},
+    ServerPolicy{"chashed", chashed, false},
+    ServerPolicy{"leastOutstanding", leastOutstanding, false}
+  };
+  for (auto& policy : policies) {
+    luaCtx.writeVariable(policy.d_name, policy);
+  }
+
+  /* ServerPool */
+  luaCtx.registerFunction<void(std::shared_ptr<ServerPool>::*)(std::shared_ptr<DNSDistPacketCache>)>("setCache", [](std::shared_ptr<ServerPool> pool, std::shared_ptr<DNSDistPacketCache> cache) {
+      if (pool) {
+        pool->packetCache = cache;
+      }
+    });
+  luaCtx.registerFunction("getCache", &ServerPool::getCache);
+  luaCtx.registerFunction<void(std::shared_ptr<ServerPool>::*)()>("unsetCache", [](std::shared_ptr<ServerPool> pool) {
+      if (pool) {
+        pool->packetCache = nullptr;
+      }
+    });
+  luaCtx.registerFunction("getECS", &ServerPool::getECS);
+  luaCtx.registerFunction("setECS", &ServerPool::setECS);
+
+  /* DownstreamState */
+  luaCtx.registerFunction<void(DownstreamState::*)(int)>("setQPS", [](DownstreamState& s, int lim) { s.qps = lim ? QPSLimiter(lim, lim) : QPSLimiter(); });
+  luaCtx.registerFunction<void(std::shared_ptr<DownstreamState>::*)(string)>("addPool", [](std::shared_ptr<DownstreamState> s, string pool) {
+      auto localPools = g_pools.getCopy();
+      addServerToPool(localPools, pool, s);
+      g_pools.setState(localPools);
+      s->pools.insert(pool);
+    });
+  luaCtx.registerFunction<void(std::shared_ptr<DownstreamState>::*)(string)>("rmPool", [](std::shared_ptr<DownstreamState> s, string pool) {
+      auto localPools = g_pools.getCopy();
+      removeServerFromPool(localPools, pool, s);
+      g_pools.setState(localPools);
+      s->pools.erase(pool);
+    });
+  luaCtx.registerFunction<uint64_t(DownstreamState::*)()const>("getOutstanding", [](const DownstreamState& s) { return s.outstanding.load(); });
+  luaCtx.registerFunction<uint64_t(DownstreamState::*)()const>("getDrops", [](const DownstreamState& s) { return s.reuseds.load(); });
+  luaCtx.registerFunction<double(DownstreamState::*)()const>("getLatency", [](const DownstreamState& s) { return s.latencyUsec; });
+  luaCtx.registerFunction("isUp", &DownstreamState::isUp);
+  luaCtx.registerFunction("setDown", &DownstreamState::setDown);
+  luaCtx.registerFunction("setUp", &DownstreamState::setUp);
+  luaCtx.registerFunction<void(DownstreamState::*)(boost::optional<bool> newStatus)>("setAuto", [](DownstreamState& s, boost::optional<bool> newStatus) {
+      if (newStatus) {
+        s.setUpStatus(*newStatus);
+      }
+      s.setAuto();
+    });
+  luaCtx.registerFunction<std::string(DownstreamState::*)()const>("getName", [](const DownstreamState& s) { return s.getName(); });
+  luaCtx.registerFunction<std::string(DownstreamState::*)()const>("getNameWithAddr", [](const DownstreamState& s) { return s.getNameWithAddr(); });
+  luaCtx.registerMember("upStatus", &DownstreamState::upStatus);
+  luaCtx.registerMember<int (DownstreamState::*)>("weight",
+    [](const DownstreamState& s) -> int {return s.weight;},
+    [](DownstreamState& s, int newWeight) {s.setWeight(newWeight);}
+  );
+  luaCtx.registerMember("order", &DownstreamState::order);
+  luaCtx.registerMember<const std::string(DownstreamState::*)>("name", [](const DownstreamState& backend) -> const std::string { return backend.getName(); }, [](DownstreamState& backend, const std::string& newName) { backend.setName(newName); });
+  luaCtx.registerFunction<std::string(DownstreamState::*)()const>("getID", [](const DownstreamState& s) { return boost::uuids::to_string(s.id); });
+
+  /* dnsheader */
+  luaCtx.registerFunction<void(dnsheader::*)(bool)>("setRD", [](dnsheader& dh, bool v) {
+      dh.rd=v;
+    });
+
+  luaCtx.registerFunction<bool(dnsheader::*)()>("getRD", [](dnsheader& dh) {
+      return (bool)dh.rd;
+    });
+
+  luaCtx.registerFunction<void(dnsheader::*)(bool)>("setRA", [](dnsheader& dh, bool v) {
+      dh.ra=v;
+    });
+
+  luaCtx.registerFunction<bool(dnsheader::*)()>("getRA", [](dnsheader& dh) {
+      return (bool)dh.ra;
+    });
+
+  luaCtx.registerFunction<void(dnsheader::*)(bool)>("setAD", [](dnsheader& dh, bool v) {
+      dh.ad=v;
+    });
+
+  luaCtx.registerFunction<bool(dnsheader::*)()>("getAD", [](dnsheader& dh) {
+      return (bool)dh.ad;
+    });
+
+  luaCtx.registerFunction<void(dnsheader::*)(bool)>("setAA", [](dnsheader& dh, bool v) {
+      dh.aa=v;
+    });
+
+  luaCtx.registerFunction<bool(dnsheader::*)()>("getAA", [](dnsheader& dh) {
+      return (bool)dh.aa;
+    });
+
+  luaCtx.registerFunction<void(dnsheader::*)(bool)>("setCD", [](dnsheader& dh, bool v) {
+      dh.cd=v;
+    });
+
+  luaCtx.registerFunction<bool(dnsheader::*)()>("getCD", [](dnsheader& dh) {
+      return (bool)dh.cd;
+    });
+
+  luaCtx.registerFunction<void(dnsheader::*)(bool)>("setTC", [](dnsheader& dh, bool v) {
+      dh.tc=v;
+      if(v) dh.ra = dh.rd; // you'll always need this, otherwise TC=1 gets ignored
+    });
+
+  luaCtx.registerFunction<void(dnsheader::*)(bool)>("setQR", [](dnsheader& dh, bool v) {
+      dh.qr=v;
+    });
+
+  /* ComboAddress */
+  luaCtx.writeFunction("newCA", [](const std::string& name) { return ComboAddress(name); });
+  luaCtx.writeFunction("newCAFromRaw", [](const std::string& raw, boost::optional<uint16_t> port) {
+                                        if (raw.size() == 4) {
+                                          struct sockaddr_in sin4;
+                                          memset(&sin4, 0, sizeof(sin4));
+                                          sin4.sin_family = AF_INET;
+                                          memcpy(&sin4.sin_addr.s_addr, raw.c_str(), raw.size());
+                                          if (port) {
+                                            sin4.sin_port = htons(*port);
+                                          }
+                                          return ComboAddress(&sin4);
+                                        }
+                                        else if (raw.size() == 16) {
+                                          struct sockaddr_in6 sin6;
+                                          memset(&sin6, 0, sizeof(sin6));
+                                          sin6.sin6_family = AF_INET6;
+                                          memcpy(&sin6.sin6_addr.s6_addr, raw.c_str(), raw.size());
+                                          if (port) {
+                                            sin6.sin6_port = htons(*port);
+                                          }
+                                          return ComboAddress(&sin6);
+                                        }
+                                        return ComboAddress();
+                                      });
+  luaCtx.registerFunction<string(ComboAddress::*)()const>("tostring", [](const ComboAddress& ca) { return ca.toString(); });
+  luaCtx.registerFunction<string(ComboAddress::*)()const>("tostringWithPort", [](const ComboAddress& ca) { return ca.toStringWithPort(); });
+  luaCtx.registerFunction<string(ComboAddress::*)()const>("__tostring", [](const ComboAddress& ca) { return ca.toString(); });
+  luaCtx.registerFunction<string(ComboAddress::*)()const>("toString", [](const ComboAddress& ca) { return ca.toString(); });
+  luaCtx.registerFunction<string(ComboAddress::*)()const>("toStringWithPort", [](const ComboAddress& ca) { return ca.toStringWithPort(); });
+  luaCtx.registerFunction<uint16_t(ComboAddress::*)()const>("getPort", [](const ComboAddress& ca) { return ntohs(ca.sin4.sin_port); } );
+  luaCtx.registerFunction<void(ComboAddress::*)(unsigned int)>("truncate", [](ComboAddress& ca, unsigned int bits) { ca.truncate(bits); });
+  luaCtx.registerFunction<bool(ComboAddress::*)()const>("isIPv4", [](const ComboAddress& ca) { return ca.sin4.sin_family == AF_INET; });
+  luaCtx.registerFunction<bool(ComboAddress::*)()const>("isIPv6", [](const ComboAddress& ca) { return ca.sin4.sin_family == AF_INET6; });
+  luaCtx.registerFunction<bool(ComboAddress::*)()const>("isMappedIPv4", [](const ComboAddress& ca) { return ca.isMappedIPv4(); });
+  luaCtx.registerFunction<ComboAddress(ComboAddress::*)()const>("mapToIPv4", [](const ComboAddress& ca) { return ca.mapToIPv4(); });
+  luaCtx.registerFunction<bool(nmts_t::*)(const ComboAddress&)>("match", [](nmts_t& s, const ComboAddress& ca) { return s.match(ca); });
+
+  /* DNSName */
+  luaCtx.registerFunction("isPartOf", &DNSName::isPartOf);
+  luaCtx.registerFunction<bool(DNSName::*)()>("chopOff", [](DNSName&dn ) { return dn.chopOff(); });
+  luaCtx.registerFunction<unsigned int(DNSName::*)()const>("countLabels", [](const DNSName& name) { return name.countLabels(); });
+  luaCtx.registerFunction<size_t(DNSName::*)()const>("hash", [](const DNSName& name) { return name.hash(); });
+  luaCtx.registerFunction<size_t(DNSName::*)()const>("wirelength", [](const DNSName& name) { return name.wirelength(); });
+  luaCtx.registerFunction<string(DNSName::*)()const>("tostring", [](const DNSName&dn ) { return dn.toString(); });
+  luaCtx.registerFunction<string(DNSName::*)()const>("toString", [](const DNSName&dn ) { return dn.toString(); });
+  luaCtx.registerFunction<string(DNSName::*)()const>("__tostring", [](const DNSName&dn ) { return dn.toString(); });
+  luaCtx.registerFunction<string(DNSName::*)()const>("toDNSString", [](const DNSName&dn ) { return dn.toDNSString(); });
+  luaCtx.writeFunction("newDNSName", [](const std::string& name) { return DNSName(name); });
+  luaCtx.writeFunction("newDNSNameFromRaw", [](const std::string& name) { return DNSName(name.c_str(), name.size(), 0, false); });
+  luaCtx.writeFunction("newSuffixMatchNode", []() { return SuffixMatchNode(); });
+  luaCtx.writeFunction("newDNSNameSet", []() { return DNSNameSet(); });
+
+  /* DNSNameSet */
+  luaCtx.registerFunction<string(DNSNameSet::*)()const>("toString", [](const DNSNameSet&dns ) { return dns.toString(); });
+  luaCtx.registerFunction<string(DNSNameSet::*)()const>("__tostring", [](const DNSNameSet&dns ) { return dns.toString(); });
+  luaCtx.registerFunction<void(DNSNameSet::*)(DNSName&)>("add", [](DNSNameSet& dns, DNSName& dn) { dns.insert(dn); });
+  luaCtx.registerFunction<bool(DNSNameSet::*)(DNSName&)>("check", [](DNSNameSet& dns, DNSName& dn) { return dns.find(dn) != dns.end(); });
+  luaCtx.registerFunction("delete",(size_t (DNSNameSet::*)(const DNSName&)) &DNSNameSet::erase);
+  luaCtx.registerFunction("size",(size_t (DNSNameSet::*)() const) &DNSNameSet::size);
+  luaCtx.registerFunction("clear",(void (DNSNameSet::*)()) &DNSNameSet::clear);
+  luaCtx.registerFunction("empty",(bool (DNSNameSet::*)() const) &DNSNameSet::empty);
+
+  /* SuffixMatchNode */
+  luaCtx.registerFunction<void (SuffixMatchNode::*)(const boost::variant<DNSName, string, vector<pair<int, DNSName>>, vector<pair<int, string>>> &name)>("add", [](SuffixMatchNode &smn, const boost::variant<DNSName, string, vector<pair<int, DNSName>>, vector<pair<int, string>>> &name) {
+      if (name.type() == typeid(DNSName)) {
+          auto n = boost::get<DNSName>(name);
+          smn.add(n);
+          return;
+      }
+      if (name.type() == typeid(string)) {
+          auto n = boost::get<string>(name);
+          smn.add(n);
+          return;
+      }
+      if (name.type() == typeid(vector<pair<int, DNSName>>)) {
+          auto names = boost::get<vector<pair<int, DNSName>>>(name);
+          for (const auto& n : names) {
+            smn.add(n.second);
+          }
+          return;
+      }
+      if (name.type() == typeid(vector<pair<int, string>>)) {
+          auto names = boost::get<vector<pair<int, string>>>(name);
+          for (const auto& n : names) {
+            smn.add(n.second);
+          }
+          return;
+      }
+  });
+  luaCtx.registerFunction<void (SuffixMatchNode::*)(const boost::variant<DNSName, string, vector<pair<int, DNSName>>, vector<pair<int, string>>> &name)>("remove", [](SuffixMatchNode &smn, const boost::variant<DNSName, string, vector<pair<int, DNSName>>, vector<pair<int, string>>> &name) {
+      if (name.type() == typeid(DNSName)) {
+          auto n = boost::get<DNSName>(name);
+          smn.remove(n);
+          return;
+      }
+      if (name.type() == typeid(string)) {
+          auto n = boost::get<string>(name);
+          DNSName d(n);
+          smn.remove(d);
+          return;
+      }
+      if (name.type() == typeid(vector<pair<int, DNSName>>)) {
+          auto names = boost::get<vector<pair<int, DNSName>>>(name);
+          for (const auto& n : names) {
+            smn.remove(n.second);
+          }
+          return;
+      }
+      if (name.type() == typeid(vector<pair<int, string>>)) {
+          auto names = boost::get<vector<pair<int, string>>>(name);
+          for (const auto& n : names) {
+            DNSName d(n.second);
+            smn.remove(d);
+          }
+          return;
+      }
+  });
+
+  luaCtx.registerFunction("check",(bool (SuffixMatchNode::*)(const DNSName&) const) &SuffixMatchNode::check);
+
+  /* Netmask */
+  luaCtx.writeFunction("newNetmask", [](boost::variant<std::string,ComboAddress> s, boost::optional<uint8_t> bits) {
+    if (s.type() == typeid(ComboAddress)) {
+      auto ca = boost::get<ComboAddress>(s);
+      if (bits) {
+        return Netmask(ca, *bits);
+      }
+      return Netmask(ca);
+    }
+    else if (s.type() == typeid(std::string)) {
+      auto str = boost::get<std::string>(s);
+      return Netmask(str);
+    }
+    throw std::runtime_error("Invalid parameter passed to 'newNetmask()'");
+  });
+  luaCtx.registerFunction("empty", &Netmask::empty);
+  luaCtx.registerFunction("getBits", &Netmask::getBits);
+  luaCtx.registerFunction<ComboAddress(Netmask::*)()const>("getNetwork", [](const Netmask& nm) { return nm.getNetwork(); } ); // const reference makes this necessary
+  luaCtx.registerFunction<ComboAddress(Netmask::*)()const>("getMaskedNetwork", [](const Netmask& nm) { return nm.getMaskedNetwork(); } );
+  luaCtx.registerFunction("isIpv4", &Netmask::isIPv4);
+  luaCtx.registerFunction("isIPv4", &Netmask::isIPv4);
+  luaCtx.registerFunction("isIpv6", &Netmask::isIPv6);
+  luaCtx.registerFunction("isIPv6", &Netmask::isIPv6);
+  luaCtx.registerFunction("match", (bool (Netmask::*)(const string&) const)&Netmask::match);
+  luaCtx.registerFunction("toString", &Netmask::toString);
+  luaCtx.registerFunction("__tostring", &Netmask::toString);
+  luaCtx.registerEqFunction(&Netmask::operator==);
+  luaCtx.registerToStringFunction(&Netmask::toString);
+
+  /* NetmaskGroup */
+  luaCtx.writeFunction("newNMG", []() { return NetmaskGroup(); });
+  luaCtx.registerFunction<void(NetmaskGroup::*)(const std::string&mask)>("addMask", [](NetmaskGroup&nmg, const std::string& mask)
+                         {
+                           nmg.addMask(mask);
+                         });
+  luaCtx.registerFunction<void(NetmaskGroup::*)(const std::map<ComboAddress,int>& map)>("addMasks", [](NetmaskGroup&nmg, const std::map<ComboAddress,int>& map)
+                         {
+                           for (const auto& entry : map) {
+                             nmg.addMask(Netmask(entry.first));
+                           }
+                         });
+
+  luaCtx.registerFunction("match", (bool (NetmaskGroup::*)(const ComboAddress&) const)&NetmaskGroup::match);
+  luaCtx.registerFunction("size", &NetmaskGroup::size);
+  luaCtx.registerFunction("clear", &NetmaskGroup::clear);
+  luaCtx.registerFunction<string(NetmaskGroup::*)()const>("toString", [](const NetmaskGroup& nmg ) { return "NetmaskGroup " + nmg.toString(); });
+  luaCtx.registerFunction<string(NetmaskGroup::*)()const>("__tostring", [](const NetmaskGroup& nmg ) { return "NetmaskGroup " + nmg.toString(); });
+
+  /* QPSLimiter */
+  luaCtx.writeFunction("newQPSLimiter", [](int rate, int burst) { return QPSLimiter(rate, burst); });
+  luaCtx.registerFunction("check", &QPSLimiter::check);
+
+  /* ClientState */
+  luaCtx.registerFunction<std::string(ClientState::*)()const>("toString", [](const ClientState& fe) {
+      setLuaNoSideEffect();
+      return fe.local.toStringWithPort();
+    });
+  luaCtx.registerFunction<std::string(ClientState::*)()const>("__tostring", [](const ClientState& fe) {
+      setLuaNoSideEffect();
+      return fe.local.toStringWithPort();
+    });
+  luaCtx.registerFunction<std::string(ClientState::*)()const>("getType", [](const ClientState& fe) {
+      setLuaNoSideEffect();
+      return fe.getType();
+  });
+  luaCtx.registerFunction<std::string(ClientState::*)()const>("getConfiguredTLSProvider", [](const ClientState& fe) {
+      setLuaNoSideEffect();
+      if (fe.tlsFrontend != nullptr) {
+        return fe.tlsFrontend->getRequestedProvider();
+      }
+      else if (fe.dohFrontend != nullptr) {
+        return std::string("openssl");
+      }
+      return std::string();
+  });
+  luaCtx.registerFunction<std::string(ClientState::*)()const>("getEffectiveTLSProvider", [](const ClientState& fe) {
+      setLuaNoSideEffect();
+      if (fe.tlsFrontend != nullptr) {
+        return fe.tlsFrontend->getEffectiveProvider();
+      }
+      else if (fe.dohFrontend != nullptr) {
+        return std::string("openssl");
+      }
+      return std::string();
+  });
+  luaCtx.registerMember("muted", &ClientState::muted);
+#ifdef HAVE_EBPF
+  luaCtx.registerFunction<void(ClientState::*)(std::shared_ptr<BPFFilter>)>("attachFilter", [](ClientState& frontend, std::shared_ptr<BPFFilter> bpf) {
+      if (bpf) {
+        frontend.attachFilter(bpf);
+      }
+    });
+  luaCtx.registerFunction<void(ClientState::*)()>("detachFilter", [](ClientState& frontend) {
+      frontend.detachFilter();
+    });
+#endif /* HAVE_EBPF */
+
+  /* BPF Filter */
+#ifdef HAVE_EBPF
+  using bpfFilterMapParams = boost::variant<uint32_t, std::unordered_map<std::string, boost::variant<uint32_t, std::string>>>;
+  luaCtx.writeFunction("newBPFFilter", [client](bpfFilterMapParams v4Params, bpfFilterMapParams v6Params, bpfFilterMapParams qnameParams, boost::optional<bool> external) {
+      if (client) {
+        return std::shared_ptr<BPFFilter>(nullptr);
+      }
+
+      BPFFilter::MapConfiguration v4Config, v6Config, qnameConfig;
+
+      auto convertParamsToConfig = [](bpfFilterMapParams& params, BPFFilter::MapType type, BPFFilter::MapConfiguration& config) {
+        config.d_type = type;
+        if (params.type() == typeid(uint32_t)) {
+          config.d_maxItems = boost::get<uint32_t>(params);
+        }
+        else if (params.type() == typeid(std::unordered_map<std::string, boost::variant<uint32_t, std::string>>)) {
+          auto map = boost::get<std::unordered_map<std::string, boost::variant<uint32_t, std::string>>>(params);
+          if (map.count("maxItems")) {
+            config.d_maxItems = boost::get<uint32_t>(map.at("maxItems"));
+          }
+          if (map.count("pinnedPath")) {
+            config.d_pinnedPath = boost::get<std::string>(map.at("pinnedPath"));
+          }
+        }
+      };
+
+      convertParamsToConfig(v4Params, BPFFilter::MapType::IPv4, v4Config);
+      convertParamsToConfig(v6Params, BPFFilter::MapType::IPv6, v6Config);
+      convertParamsToConfig(qnameParams, BPFFilter::MapType::QNames, qnameConfig);
+
+      BPFFilter::MapFormat format = BPFFilter::MapFormat::Legacy;
+      if (external && *external) {
+        format = BPFFilter::MapFormat::WithActions;
+      }
+
+      return std::make_shared<BPFFilter>(v4Config, v6Config, qnameConfig, format, external.value_or(false));
+    });
+
+  luaCtx.registerFunction<void(std::shared_ptr<BPFFilter>::*)(const ComboAddress& ca, boost::optional<uint32_t> action)>("block", [](std::shared_ptr<BPFFilter> bpf, const ComboAddress& ca, boost::optional<uint32_t> action) {
+      if (bpf) {
+        if (!action) {
+          return bpf->block(ca, BPFFilter::MatchAction::Drop);
+        }
+        else {
+          BPFFilter::MatchAction match;
+
+          switch (*action) {
+          case 0:
+            match = BPFFilter::MatchAction::Pass;
+            break;
+          case 1:
+            match = BPFFilter::MatchAction::Drop;
+            break;
+          case 2:
+            match = BPFFilter::MatchAction::Truncate;
+            break;
+          default:
+            throw std::runtime_error("Unsupported action for BPFFilter::block");
+          }
+          return bpf->block(ca, match);
+        }
+      }
+    });
+
+  luaCtx.registerFunction<void(std::shared_ptr<BPFFilter>::*)(const DNSName& qname, boost::optional<uint16_t> qtype, boost::optional<uint32_t> action)>("blockQName", [](std::shared_ptr<BPFFilter> bpf, const DNSName& qname, boost::optional<uint16_t> qtype, boost::optional<uint32_t> action) {
+      if (bpf) {
+        if (!action) {
+          return bpf->block(qname, BPFFilter::MatchAction::Drop, qtype.value_or(255));
+        }
+        else {
+          BPFFilter::MatchAction match;
+
+          switch (*action) {
+          case 0:
+            match = BPFFilter::MatchAction::Pass;
+            break;
+          case 1:
+            match = BPFFilter::MatchAction::Drop;
+            break;
+          case 2:
+            match = BPFFilter::MatchAction::Truncate;
+            break;
+          default:
+            throw std::runtime_error("Unsupported action for BPFFilter::blockQName");
+          }
+          return bpf->block(qname, match, qtype.value_or(255));
+        }
+      }
+    });
+
+  luaCtx.registerFunction<void(std::shared_ptr<BPFFilter>::*)(const ComboAddress& ca)>("unblock", [](std::shared_ptr<BPFFilter> bpf, const ComboAddress& ca) {
+      if (bpf) {
+        return bpf->unblock(ca);
+      }
+    });
+
+  luaCtx.registerFunction<void(std::shared_ptr<BPFFilter>::*)(const DNSName& qname, boost::optional<uint16_t> qtype)>("unblockQName", [](std::shared_ptr<BPFFilter> bpf, const DNSName& qname, boost::optional<uint16_t> qtype) {
+      if (bpf) {
+        return bpf->unblock(qname, qtype ? *qtype : 255);
+      }
+    });
+
+  luaCtx.registerFunction<std::string(std::shared_ptr<BPFFilter>::*)()const>("getStats", [](const std::shared_ptr<BPFFilter> bpf) {
+      setLuaNoSideEffect();
+      std::string res;
+      if (bpf) {
+        auto stats = bpf->getAddrStats();
+        for (const auto& value : stats) {
+          if (value.first.sin4.sin_family == AF_INET) {
+            res += value.first.toString() + ": " + std::to_string(value.second) + "\n";
+          }
+          else if (value.first.sin4.sin_family == AF_INET6) {
+            res += "[" + value.first.toString() + "]: " + std::to_string(value.second) + "\n";
+          }
+        }
+        auto qstats = bpf->getQNameStats();
+        for (const auto& value : qstats) {
+          res += std::get<0>(value).toString() + " " + std::to_string(std::get<1>(value)) + ": " + std::to_string(std::get<2>(value)) + "\n";
+        }
+      }
+      return res;
+    });
+
+  luaCtx.registerFunction<void(std::shared_ptr<BPFFilter>::*)()>("attachToAllBinds", [](std::shared_ptr<BPFFilter> bpf) {
+      std::string res;
+      if (bpf) {
+        for (const auto& frontend : g_frontends) {
+          frontend->attachFilter(bpf);
+        }
+      }
+    });
+
+    luaCtx.writeFunction("newDynBPFFilter", [client](std::shared_ptr<BPFFilter> bpf) {
+        if (client) {
+          return std::shared_ptr<DynBPFFilter>(nullptr);
+        }
+        return std::make_shared<DynBPFFilter>(bpf);
+      });
+
+    luaCtx.registerFunction<void(std::shared_ptr<DynBPFFilter>::*)(const ComboAddress& addr, boost::optional<int> seconds)>("block", [](std::shared_ptr<DynBPFFilter> dbpf, const ComboAddress& addr, boost::optional<int> seconds) {
+        if (dbpf) {
+          struct timespec until;
+          clock_gettime(CLOCK_MONOTONIC, &until);
+          until.tv_sec += seconds ? *seconds : 10;
+          dbpf->block(addr, until);
+        }
+    });
+
+    luaCtx.registerFunction<void(std::shared_ptr<DynBPFFilter>::*)()>("purgeExpired", [](std::shared_ptr<DynBPFFilter> dbpf) {
+        if (dbpf) {
+          struct timespec now;
+          clock_gettime(CLOCK_MONOTONIC, &now);
+          dbpf->purgeExpired(now);
+        }
+    });
+
+    luaCtx.registerFunction<void(std::shared_ptr<DynBPFFilter>::*)(boost::variant<std::string, std::vector<std::pair<int, std::string>>>)>("excludeRange", [](std::shared_ptr<DynBPFFilter> dbpf, boost::variant<std::string, std::vector<std::pair<int, std::string>>> ranges) {
+      if (!dbpf) {
+        return;
+      }
+
+      if (ranges.type() == typeid(std::vector<std::pair<int, std::string>>)) {
+        for (const auto& range : *boost::get<std::vector<std::pair<int, std::string>>>(&ranges)) {
+          dbpf->excludeRange(Netmask(range.second));
+        }
+      }
+      else {
+        dbpf->excludeRange(Netmask(*boost::get<std::string>(&ranges)));
+      }
+    });
+
+    luaCtx.registerFunction<void(std::shared_ptr<DynBPFFilter>::*)(boost::variant<std::string, std::vector<std::pair<int, std::string>>>)>("includeRange", [](std::shared_ptr<DynBPFFilter> dbpf, boost::variant<std::string, std::vector<std::pair<int, std::string>>> ranges) {
+      if (!dbpf) {
+        return;
+      }
+
+      if (ranges.type() == typeid(std::vector<std::pair<int, std::string>>)) {
+        for (const auto& range : *boost::get<std::vector<std::pair<int, std::string>>>(&ranges)) {
+          dbpf->includeRange(Netmask(range.second));
+        }
+      }
+      else {
+        dbpf->includeRange(Netmask(*boost::get<std::string>(&ranges)));
+      }
+    });
+#endif /* HAVE_EBPF */
+
+  /* EDNSOptionView */
+  luaCtx.registerFunction<size_t(EDNSOptionView::*)()const>("count", [](const EDNSOptionView& option) {
+      return option.values.size();
+    });
+  luaCtx.registerFunction<std::vector<string>(EDNSOptionView::*)()const>("getValues", [] (const EDNSOptionView& option) {
+    std::vector<string> values;
+    for (const auto& value : option.values) {
+      values.push_back(std::string(value.content, value.size));
+    }
+    return values;
+  });
+
+  luaCtx.writeFunction("newDOHResponseMapEntry", [](const std::string& regex, uint16_t status, const std::string& content, boost::optional<std::map<std::string, std::string>> customHeaders) {
+    boost::optional<std::vector<std::pair<std::string, std::string>>> headers{boost::none};
+    if (customHeaders) {
+      headers = std::vector<std::pair<std::string, std::string>>();
+      for (const auto& header : *customHeaders) {
+        headers->push_back({ boost::to_lower_copy(header.first), header.second });
+      }
+    }
+    return std::make_shared<DOHResponseMapEntry>(regex, status, PacketBuffer(content.begin(), content.end()), headers);
+  });
+
+  luaCtx.writeFunction("newSVCRecordParameters", [](uint16_t priority, const std::string& target, boost::optional<svcParamsLua_t> additionalParameters)
+  {
+    SVCRecordParameters parameters;
+    if (additionalParameters) {
+      parameters = parseSVCParameters(*additionalParameters);
+    }
+    parameters.priority = priority;
+    parameters.target = DNSName(target);
+
+    return parameters;
+  });
+}
-- 
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