lokinet/llarp/iwp/message_buffer.hpp

119 lines
2.6 KiB
C++

#ifndef LLARP_IWP_MESSAGE_BUFFER_HPP
#define LLARP_IWP_MESSAGE_BUFFER_HPP
#include <vector>
#include <constants/link_layer.hpp>
#include <link/session.hpp>
#include <util/aligned.hpp>
#include <util/buffer.hpp>
#include <util/types.hpp>
namespace llarp
{
namespace iwp
{
enum Command
{
/// keep alive message
ePING = 0,
/// begin transission
eXMIT = 1,
/// fragment data
eDATA = 2,
/// acknolege fragments
eACKS = 3,
/// negative ack
eNACK = 4,
/// close session
eCLOS = 5,
/// multiack
eMACK = 6,
};
static constexpr size_t FragmentSize = 1024;
struct OutboundMessage
{
OutboundMessage() = default;
OutboundMessage(uint64_t msgid, const llarp_buffer_t &pkt,
llarp_time_t now,
ILinkSession::CompletionHandler handler);
AlignedBuffer< MAX_LINK_MSG_SIZE > m_Data;
uint16_t m_Size = 0;
uint64_t m_MsgID = 0;
std::bitset< MAX_LINK_MSG_SIZE / FragmentSize > m_Acks;
ILinkSession::CompletionHandler m_Completed;
llarp_time_t m_LastFlush = 0;
ShortHash digest;
llarp_time_t m_StartedAt = 0;
std::vector< byte_t >
XMIT() const;
void
Ack(byte_t bitmask);
void
FlushUnAcked(std::function< void(const llarp_buffer_t &) > sendpkt,
llarp_time_t now);
bool
ShouldFlush(llarp_time_t now) const;
void
Completed();
bool
IsTransmitted() const;
bool
IsTimedOut(llarp_time_t now) const;
void
InformTimeout();
};
struct InboundMessage
{
InboundMessage() = default;
InboundMessage(uint64_t msgid, uint16_t sz, ShortHash h,
llarp_time_t now);
AlignedBuffer< MAX_LINK_MSG_SIZE > m_Data;
ShortHash m_Digset;
uint16_t m_Size = 0;
uint64_t m_MsgID = 0;
llarp_time_t m_LastACKSent = 0;
llarp_time_t m_LastActiveAt = 0;
std::bitset< MAX_LINK_MSG_SIZE / FragmentSize > m_Acks;
void
HandleData(uint16_t idx, const llarp_buffer_t &buf, llarp_time_t now);
bool
IsCompleted() const;
bool
IsTimedOut(llarp_time_t now) const;
bool
Verify() const;
byte_t
AcksBitmask() const;
bool
ShouldSendACKS(llarp_time_t now) const;
void
SendACKS(std::function< void(const llarp_buffer_t &) > sendpkt,
llarp_time_t now);
std::vector< byte_t >
ACKS() const;
};
} // namespace iwp
} // namespace llarp
#endif