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68 lines
2.1 KiB
C++
68 lines
2.1 KiB
C++
#include "client.hpp"
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#include "tunnel.hpp"
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#include <llarp/util/logging/buffer.hpp>
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#include <llarp/util/logging.hpp>
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#include <oxenc/variant.h>
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#include <llarp/service/address.hpp>
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#include <llarp/service/endpoint.hpp>
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#include <llarp/ev/libuv.hpp>
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#include <variant>
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namespace llarp::quic
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{
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Client::Client(EndpointBase& ep, const SockAddr& remote, uint16_t pseudo_port) : Endpoint{ep}
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{
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default_stream_buffer_size =
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0; // We steal uvw's provided buffers so don't need an outgoing data buffer
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// *Our* port; we stuff this in the llarp quic header so it knows how to target quic packets
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// back to *this* client.
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local_addr.port(ToNet(huint16_t{pseudo_port}));
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uint16_t tunnel_port = remote.getPort();
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if (tunnel_port == 0)
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throw std::logic_error{"Cannot tunnel to port 0"};
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// TODO: need timers for:
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//
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// - timeout (to disconnect if idle for too long)
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//
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// - probably don't need for lokinet tunnel: change local addr -- attempts to re-bind the local
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// socket
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//
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// - key_update_timer
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Path path{local_addr, remote};
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llarp::LogDebug("Connecting to ", remote);
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auto conn = std::make_shared<Connection>(*this, ConnectionID::random(), path, tunnel_port);
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conn->io_ready();
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conns.emplace(conn->base_cid, std::move(conn));
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}
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std::shared_ptr<Connection>
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Client::get_connection()
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{
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// A client only has one outgoing connection, so everything in conns should either be a
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// shared_ptr or weak_ptr to that same outgoing connection so we can just use the first one.
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auto it = conns.begin();
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if (it == conns.end())
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return nullptr;
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if (auto* wptr = std::get_if<alias_conn_ptr>(&it->second))
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return wptr->lock();
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return var::get<primary_conn_ptr>(it->second);
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}
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size_t
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Client::write_packet_header(nuint16_t, uint8_t ecn)
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{
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buf_[0] = CLIENT_TO_SERVER;
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auto pseudo_port = local_addr.port();
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std::memcpy(&buf_[1], &pseudo_port.n, 2); // remote quic pseudo-port (network order u16)
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buf_[3] = std::byte{ecn};
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return 4;
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}
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} // namespace llarp::quic
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