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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.
*/
#include "dnsdist.hh"
#include "dnsdist-rings.hh"
#include "dnsdist-lua.hh"
#ifndef DISABLE_LUA_BINDINGS_RINGS
struct LuaRingEntry
{
DNSName qname;
ComboAddress requestor;
ComboAddress ds;
struct timespec when;
std::string macAddr;
struct dnsheader dh;
unsigned int usec;
unsigned int size;
uint16_t qtype;
dnsdist::Protocol protocol;
bool isResponse;
};
template <typename T>
static void addRingEntryToList(LuaArray<LuaRingEntry>& list, const T& entry)
{
constexpr bool response = std::is_same_v<T, Rings::Response>;
if constexpr (!response) {
#if defined(DNSDIST_RINGS_WITH_MACADDRESS)
list.emplace_back(list.size() + 1, LuaRingEntry{entry.name, entry.requestor, ComboAddress(), entry.when, entry.hasmac ? std::string(reinterpret_cast<const char*>(entry.macaddress.data()), entry.macaddress.size()) : std::string(), entry.dh, 0U, entry.size, entry.qtype, entry.protocol, false});
#else
list.emplace_back(list.size() + 1, LuaRingEntry{entry.name, entry.requestor, ComboAddress(), entry.when, std::string(), entry.dh, 0U, entry.size, entry.qtype, entry.protocol, false});
#endif
}
else {
list.emplace_back(list.size() + 1, LuaRingEntry{entry.name, entry.requestor, entry.ds, entry.when, std::string(), entry.dh, entry.usec, entry.size, entry.qtype, entry.protocol, true});
}
}
#endif /* DISABLE_LUA_BINDINGS_RINGS */
void setupLuaBindingsRings(LuaContext& luaCtx, bool client)
{
#ifndef DISABLE_LUA_BINDINGS_RINGS
luaCtx.writeFunction("getRingEntries", [client]() {
LuaArray<LuaRingEntry> results;
if (client) {
return results;
}
for (const auto& shard : g_rings.d_shards) {
{
auto ql = shard->queryRing.lock();
for (const auto& entry : *ql) {
addRingEntryToList(results, entry);
}
}
{
auto rl = shard->respRing.lock();
for (const auto& entry : *rl) {
addRingEntryToList(results, entry);
}
}
}
return results;
});
luaCtx.registerMember<DNSName(LuaRingEntry::*)>(std::string("qname"), [](const LuaRingEntry& entry) {
return entry.qname;
});
luaCtx.registerMember<ComboAddress(LuaRingEntry::*)>(std::string("requestor"), [](const LuaRingEntry& entry) {
return entry.requestor;
});
luaCtx.registerMember<ComboAddress(LuaRingEntry::*)>(std::string("backend"), [](const LuaRingEntry& entry) {
return entry.ds;
});
luaCtx.registerMember<timespec(LuaRingEntry::*)>(std::string("when"), [](const LuaRingEntry& entry) {
return entry.when;
});
luaCtx.registerMember<std::string(LuaRingEntry::*)>(std::string("macAddress"), [](const LuaRingEntry& entry) {
return entry.macAddr;
});
luaCtx.registerMember<dnsheader(LuaRingEntry::*)>(std::string("dnsheader"), [](const LuaRingEntry& entry) {
return entry.dh;
});
luaCtx.registerMember<unsigned int(LuaRingEntry::*)>(std::string("usec"), [](const LuaRingEntry& entry) {
return entry.usec;
});
luaCtx.registerMember<unsigned int(LuaRingEntry::*)>(std::string("size"), [](const LuaRingEntry& entry) {
return entry.size;
});
luaCtx.registerMember<uint16_t(LuaRingEntry::*)>(std::string("qtype"), [](const LuaRingEntry& entry) {
return entry.qtype;
});
luaCtx.registerMember<std::string(LuaRingEntry::*)>(std::string("protocol"), [](const LuaRingEntry& entry) {
return entry.protocol.toString();
});
luaCtx.registerMember<bool(LuaRingEntry::*)>(std::string("isResponse"), [](const LuaRingEntry& entry) {
return entry.isResponse;
});
luaCtx.registerMember<int64_t(timespec::*)>(std::string("tv_sec"), [](const timespec& ts) {
return ts.tv_sec;
});
luaCtx.registerMember<uint64_t(timespec::*)>(std::string("tv_nsec"), [](const timespec& ts) {
return ts.tv_nsec;
});
#endif /* DISABLE_LUA_BINDINGS_RINGS */
}
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