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73 lines
1.9 KiB
C++
73 lines
1.9 KiB
C++
#include "server.hpp"
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#include <llarp/util/logging.hpp>
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#include <llarp/util/logging/buffer.hpp>
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#include <oxenc/variant.h>
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#include <uvw/loop.h>
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#include <stdexcept>
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#include <tuple>
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#include <variant>
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namespace llarp::quic
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{
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std::shared_ptr<Connection>
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Server::accept_initial_connection(const Packet& p)
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{
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LogDebug("Accepting new connection");
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// This is a new incoming connection
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ngtcp2_pkt_hd hd;
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auto rv = ngtcp2_accept(&hd, u8data(p.data), p.data.size());
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if (rv == -1)
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{ // Invalid packet
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LogWarn("Invalid packet received, length=", p.data.size());
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LogTrace("packet body: ", buffer_printer{p.data});
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return nullptr;
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}
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if (rv == 1)
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{ // Invalid/unexpected version, send a version negotiation
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LogDebug("Invalid/unsupported version; sending version negotiation");
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send_version_negotiation(
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version_info{hd.version, hd.dcid.data, hd.dcid.datalen, hd.scid.data, hd.scid.datalen},
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p.path.remote);
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return nullptr;
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}
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if (hd.type == NGTCP2_PKT_0RTT)
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{
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LogWarn("Received 0-RTT packet, which shouldn't happen in our implementation; dropping");
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return nullptr;
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}
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if (hd.type == NGTCP2_PKT_INITIAL && hd.token.len)
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{
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// This is a normal QUIC thing, but we don't do it:
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LogWarn("Unexpected token in initial packet");
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}
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// create and store Connection
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for (;;)
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{
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if (auto [it, ins] = conns.emplace(ConnectionID::random(), primary_conn_ptr{}); ins)
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{
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auto connptr = std::make_shared<Connection>(*this, it->first, hd, p.path);
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it->second = connptr;
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return connptr;
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}
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}
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}
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size_t
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Server::write_packet_header(nuint16_t pport, uint8_t ecn)
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{
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buf_[0] = SERVER_TO_CLIENT;
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std::memcpy(&buf_[1], &pport.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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