mirror of
https://github.com/oxen-io/lokinet.git
synced 2024-11-03 23:15:52 +00:00
7caa87862e
All #ifndef guards on headers have been removed, I think, in favor of #pragma once Headers are now included as `#include "filename"` if the included file resides in the same directory as the file including it, or any subdirectory therein. Otherwise they are included as `#include <project/top/dir/relative/path/filename>` The above does not include system/os headers.
89 lines
2.2 KiB
C++
89 lines
2.2 KiB
C++
#pragma once
|
|
|
|
#include "message.hpp"
|
|
#include <llarp/ev/ev.hpp>
|
|
#include <llarp/net/net.hpp>
|
|
#include "unbound_resolver.hpp"
|
|
|
|
#include <unordered_map>
|
|
|
|
namespace llarp
|
|
{
|
|
namespace dns
|
|
{
|
|
/// handler of dns query hooking
|
|
class IQueryHandler
|
|
{
|
|
public:
|
|
virtual ~IQueryHandler() = default;
|
|
|
|
/// return true if we should hook this message
|
|
virtual bool
|
|
ShouldHookDNSMessage(const Message& msg) const = 0;
|
|
|
|
/// handle a hooked message
|
|
virtual bool
|
|
HandleHookedDNSMessage(Message query, std::function<void(Message)> sendReply) = 0;
|
|
};
|
|
|
|
// Base class for DNS lookups
|
|
class PacketHandler : public std::enable_shared_from_this<PacketHandler>
|
|
{
|
|
public:
|
|
explicit PacketHandler(EventLoop_ptr loop, IQueryHandler* handler);
|
|
|
|
virtual ~PacketHandler() = default;
|
|
|
|
virtual bool
|
|
Start(SockAddr localaddr, std::vector<IpAddress> upstreamResolvers);
|
|
|
|
void
|
|
Stop();
|
|
|
|
void
|
|
Restart();
|
|
|
|
void
|
|
HandlePacket(const SockAddr& resolver, const SockAddr& from, llarp_buffer_t buf);
|
|
|
|
bool
|
|
ShouldHandlePacket(const SockAddr& to, const SockAddr& from, llarp_buffer_t buf) const;
|
|
|
|
protected:
|
|
virtual void
|
|
SendServerMessageBufferTo(const SockAddr& from, const SockAddr& to, llarp_buffer_t buf) = 0;
|
|
|
|
private:
|
|
void
|
|
HandleUpstreamFailure(const SockAddr& from, const SockAddr& to, Message msg);
|
|
|
|
bool
|
|
SetupUnboundResolver(std::vector<IpAddress> resolvers);
|
|
|
|
IQueryHandler* const m_QueryHandler;
|
|
std::set<IpAddress> m_Resolvers;
|
|
std::shared_ptr<UnboundResolver> m_UnboundResolver;
|
|
EventLoop_ptr m_Loop;
|
|
};
|
|
|
|
// Proxying DNS handler that listens on a UDP port for proper DNS requests.
|
|
class Proxy : public PacketHandler
|
|
{
|
|
public:
|
|
explicit Proxy(EventLoop_ptr loop, IQueryHandler* handler);
|
|
|
|
bool
|
|
Start(SockAddr localaddr, std::vector<IpAddress> resolvers) override;
|
|
|
|
protected:
|
|
void
|
|
SendServerMessageBufferTo(
|
|
const SockAddr& from, const SockAddr& to, llarp_buffer_t buf) override;
|
|
|
|
private:
|
|
std::shared_ptr<UDPHandle> m_Server;
|
|
EventLoop_ptr m_Loop;
|
|
};
|
|
} // namespace dns
|
|
} // namespace llarp
|