lokinet/llarp/iwp/linklayer.hpp
Jason Rhinelander 36792d4337
Fix multi-field < ordering
Lots and lots of places in the code had broken < operators because they
are returning something like:

    foo < other.foo or bar < other.bar;

but this breaks both the strict weak ordering requirements that are
required for the "Compare" requirement for things like
std::map/set/priority_queue.

For example:

    a = {.foo=1, .bar=3}
    b = {.foo=3, .bar=1}

does not have an ordering over a and b (both `a < b` and `b < a` are
satisfied at the same time).

This needs to be instead something like:

    foo < other.foo or (foo == other.foo and bar < other.bar)

but that's a bit clunkier, and it is easier to use std::tie for tuple's
built-in < comparison which does the right thing:

    std::tie(foo, bar) < std::tie(other.foo, other.bar)

(Initially I noticed this in SockAddr/sockaddr_in6, but upon further
investigation this extends to the major of multi-field `operator<`'s.)

This fixes it by using std::tie (or something similar) everywhere we are
doing multi-field inequalities.
2022-10-13 16:29:13 -03:00

64 lines
1.4 KiB
C++

#pragma once
#include <llarp/constants/link_layer.hpp>
#include <llarp/crypto/crypto.hpp>
#include <llarp/crypto/encrypted.hpp>
#include <llarp/crypto/types.hpp>
#include <llarp/link/server.hpp>
#include <llarp/config/key_manager.hpp>
#include <memory>
#include <llarp/ev/ev.hpp>
namespace llarp::iwp
{
struct Session;
struct LinkLayer final : public ILinkLayer
{
LinkLayer(
std::shared_ptr<KeyManager> keyManager,
std::shared_ptr<EventLoop> ev,
GetRCFunc getrc,
LinkMessageHandler h,
SignBufferFunc sign,
BeforeConnectFunc_t before,
SessionEstablishedHandler est,
SessionRenegotiateHandler reneg,
TimeoutHandler timeout,
SessionClosedHandler closed,
PumpDoneHandler pumpDone,
WorkerFunc_t dowork,
bool permitInbound);
std::shared_ptr<ILinkSession>
NewOutboundSession(const RouterContact& rc, const AddressInfo& ai) override;
std::string_view
Name() const override;
uint16_t
Rank() const override;
void
RecvFrom(const SockAddr& from, ILinkSession::Packet_t pkt) override;
void
WakeupPlaintext();
std::string
PrintableName() const;
private:
void
HandleWakeupPlaintext();
const std::shared_ptr<EventLoopWakeup> m_Wakeup;
std::vector<ILinkSession*> m_WakingUp;
const bool m_Inbound;
};
using LinkLayer_ptr = std::shared_ptr<LinkLayer>;
} // namespace llarp::iwp