5630f636cd
This defines adapter classes for converting from the tcp<> class to the abstractions that applications use. Still very inefficient due to impedance mismatch between the data types used.
140 lines
4.4 KiB
C++
140 lines
4.4 KiB
C++
/*
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* Copyright (C) 2014 Cloudius Systems, Ltd.
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*/
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#include "stack.hh"
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#include "net.hh"
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#include "ip.hh"
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#include "tcp.hh"
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#include <memory>
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#include <queue>
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namespace net {
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class native_networking_stack;
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template <typename Protocol>
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class native_server_socket_impl;
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template <typename Protocol>
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class native_connected_socket_impl;
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template <typename Protocol>
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class native_connected_socket_impl : public connected_socket_impl {
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typename Protocol::connection _conn;
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class native_data_source_impl;
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class native_data_sink_impl;
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public:
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explicit native_connected_socket_impl(typename Protocol::connection conn)
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: _conn(std::move(conn)) {}
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virtual input_stream<char> input() override;
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virtual output_stream<char> output() override;
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};
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template <typename Protocol>
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class native_server_socket_impl : public server_socket_impl {
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Protocol& _proto;
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uint16_t _port;
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public:
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native_server_socket_impl(Protocol& proto, uint16_t port, listen_options opt);
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virtual future<connected_socket, socket_address> accept() override;
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};
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class native_networking_stack : public networking_stack {
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static std::unique_ptr<native_networking_stack> _s;
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interface _netif;
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ipv4 _inet;
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using tcp4 = tcp<ipv4_traits>;
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public:
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explicit native_networking_stack(std::unique_ptr<device> dev);
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virtual server_socket listen(socket_address sa, listen_options opt) override;
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friend class native_server_socket_impl<tcp4>;
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};
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native_networking_stack::native_networking_stack(std::unique_ptr<device> dev)
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: _netif(std::move(dev))
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, _inet(&_netif) {
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}
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template <typename Protocol>
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native_server_socket_impl<Protocol>::native_server_socket_impl(Protocol& proto, uint16_t port, listen_options opt)
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: _proto(proto), _port(port) {
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}
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template <typename Protocol>
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future<connected_socket, socket_address>
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native_server_socket_impl<Protocol>::accept() {
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return _proto.listen(_port).then([this] (typename Protocol::connection conn) {
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return make_ready_future<connected_socket, socket_address>(
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connected_socket(std::make_unique<native_connected_socket_impl<Protocol>>(std::move(conn))),
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socket_address()); // FIXME: don't fake it
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});
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}
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server_socket
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native_networking_stack::listen(socket_address sa, listen_options opts) {
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assert(sa.as_posix_sockaddr().sa_family == AF_INET);
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return server_socket(std::make_unique<native_server_socket_impl<tcp4>>(
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_inet.get_tcp(), sa.as_posix_sockaddr_in().sin_port, opts));
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}
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template <typename Protocol>
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class native_connected_socket_impl<Protocol>::native_data_source_impl final
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: public data_source_impl {
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typename Protocol::connection& _conn;
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size_t _cur_frag = 0;
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packet _buf;
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public:
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explicit native_data_source_impl(typename Protocol::connection& conn)
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: _conn(conn) {}
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virtual future<temporary_buffer<char>> get() override {
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if (_cur_frag != _buf.fragments.size()) {
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auto& f = _buf.fragments[_cur_frag++];
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return make_ready_future<temporary_buffer<char>>(
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temporary_buffer<char>(f.base, f.size,
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make_deleter(nullptr, [p = _buf.share()] () mutable {})));
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}
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return _conn.wait_for_data().then([this] {
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_buf = _conn.read();
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_cur_frag = 0;
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return get();
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});
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}
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};
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template <typename Protocol>
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class native_connected_socket_impl<Protocol>::native_data_sink_impl final
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: public data_sink_impl {
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typename Protocol::connection& _conn;
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public:
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explicit native_data_sink_impl(typename Protocol::connection& conn)
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: _conn(conn) {}
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virtual future<> put(std::vector<temporary_buffer<char>> data) override {
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std::vector<fragment> frags;
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frags.reserve(data.size());
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for (auto& e : data) {
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frags.push_back(fragment{e.get_write(), e.size()});
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}
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return _conn.send(packet(std::move(frags), [tmp = std::move(data)] () mutable {}));
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}
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};
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template <typename Protocol>
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input_stream<char>
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native_connected_socket_impl<Protocol>::input() {
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data_source ds(std::make_unique<native_data_source_impl>(_conn));
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return input_stream<char>(std::move(ds));
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}
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template <typename Protocol>
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output_stream<char>
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native_connected_socket_impl<Protocol>::output() {
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data_sink ds(std::make_unique<native_data_sink_impl>(_conn));
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return output_stream<char>(std::move(ds), 8192);
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}
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std::unique_ptr<native_networking_stack> native_networking_stack::_s;
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}
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