lokinet/llarp/dns/message.hpp
2021-09-02 14:17:09 -04:00

115 lines
2.5 KiB
C++

#pragma once
#include "serialize.hpp"
#include "rr.hpp"
#include "question.hpp"
namespace llarp
{
namespace dns
{
struct SRVData;
using MsgID_t = uint16_t;
using Fields_t = uint16_t;
using Count_t = uint16_t;
struct MessageHeader : public Serialize
{
static constexpr size_t Size = 12;
MessageHeader() = default;
MsgID_t id;
Fields_t fields;
Count_t qd_count;
Count_t an_count;
Count_t ns_count;
Count_t ar_count;
bool
Encode(llarp_buffer_t* buf) const override;
bool
Decode(llarp_buffer_t* buf) override;
util::StatusObject
ToJSON() const override;
bool
operator==(const MessageHeader& other) const
{
return id == other.id && fields == other.fields && qd_count == other.qd_count
&& an_count == other.an_count && ns_count == other.ns_count
&& ar_count == other.ar_count;
}
};
struct Message : public Serialize
{
explicit Message(const MessageHeader& hdr);
explicit Message(const Question& question);
Message(Message&& other);
Message(const Message& other);
util::StatusObject
ToJSON() const override;
void
AddNXReply(RR_TTL_t ttl = 1);
void
AddServFail(RR_TTL_t ttl = 30);
void
AddMXReply(std::string name, uint16_t priority, RR_TTL_t ttl = 1);
void
AddCNAMEReply(std::string name, RR_TTL_t ttl = 1);
void
AddINReply(llarp::huint128_t addr, bool isV6, RR_TTL_t ttl = 1);
void
AddAReply(std::string name, RR_TTL_t ttl = 1);
void
AddSRVReply(std::vector<SRVData> records, RR_TTL_t ttl = 1);
void
AddNSReply(std::string name, RR_TTL_t ttl = 1);
void
AddTXTReply(std::string value, RR_TTL_t ttl = 1);
bool
Encode(llarp_buffer_t* buf) const override;
bool
Decode(llarp_buffer_t* buf) override;
// Wrapper around Encode that encodes into a new buffer and returns it
[[nodiscard]] OwnedBuffer
ToBuffer() const;
std::ostream&
print(std::ostream& stream, int level, int spaces) const;
MsgID_t hdr_id;
Fields_t hdr_fields;
std::vector<Question> questions;
std::vector<ResourceRecord> answers;
std::vector<ResourceRecord> authorities;
std::vector<ResourceRecord> additional;
};
inline std::ostream&
operator<<(std::ostream& out, const Message& msg)
{
msg.print(out, -1, -1);
return out;
}
} // namespace dns
} // namespace llarp