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/*
* 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.
*/
#pragma once
#include <random>
struct ResponseConfig
{
boost::optional<bool> setAA{boost::none};
boost::optional<bool> setAD{boost::none};
boost::optional<bool> setRA{boost::none};
uint32_t ttl{60};
};
void setResponseHeadersFromConfig(dnsheader& dh, const ResponseConfig& config);
class SpoofAction : public DNSAction
{
public:
SpoofAction(const vector<ComboAddress>& addrs): d_addrs(addrs)
{
for (const auto& addr : d_addrs) {
if (addr.isIPv4()) {
d_types.insert(QType::A);
}
else if (addr.isIPv6()) {
d_types.insert(QType::AAAA);
}
}
if (!d_addrs.empty()) {
d_types.insert(QType::ANY);
}
}
SpoofAction(const DNSName& cname): d_cname(cname)
{
}
SpoofAction(const vector<std::string>& raws): d_rawResponses(raws)
{
}
DNSAction::Action operator()(DNSQuestion* dq, string* ruleresult) const override;
string toString() const override
{
string ret = "spoof in ";
if (!d_cname.empty()) {
ret += d_cname.toString() + " ";
}
if (d_rawResponses.size() > 0) {
ret += "raw bytes ";
}
else {
for(const auto& a : d_addrs)
ret += a.toString()+" ";
}
return ret;
}
ResponseConfig d_responseConfig;
private:
static thread_local std::default_random_engine t_randomEngine;
std::vector<ComboAddress> d_addrs;
std::set<uint16_t> d_types;
std::vector<std::string> d_rawResponses;
DNSName d_cname;
};
typedef boost::variant<string, vector<pair<int, string>>, std::shared_ptr<DNSRule>, DNSName, vector<pair<int, DNSName> > > luadnsrule_t;
std::shared_ptr<DNSRule> makeRule(const luadnsrule_t& var);
typedef std::unordered_map<std::string, boost::variant<std::string> > luaruleparams_t;
void parseRuleParams(boost::optional<luaruleparams_t> params, boost::uuids::uuid& uuid, std::string& name, uint64_t& creationOrder);
typedef NetmaskTree<DynBlock, AddressAndPortRange> nmts_t;
vector<std::function<void(void)>> setupLua(LuaContext& luaCtx, bool client, bool configCheck, const std::string& config);
void setupLuaActions(LuaContext& luaCtx);
void setupLuaBindings(LuaContext& luaCtx, bool client);
void setupLuaBindingsDNSCrypt(LuaContext& luaCtx);
void setupLuaBindingsDNSQuestion(LuaContext& luaCtx);
void setupLuaBindingsKVS(LuaContext& luaCtx, bool client);
void setupLuaBindingsPacketCache(LuaContext& luaCtx, bool client);
void setupLuaBindingsProtoBuf(LuaContext& luaCtx, bool client, bool configCheck);
void setupLuaRules(LuaContext& luaCtx);
void setupLuaInspection(LuaContext& luaCtx);
void setupLuaVars(LuaContext& luaCtx);
void setupLuaWeb(LuaContext& luaCtx);
void setupLuaLoadBalancingContext(LuaContext& luaCtx);
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