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+/*
+ * nghttp2 - HTTP/2 C Library
+ *
+ * Copyright (c) 2021 Tatsuhiro Tsujikawa
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining
+ * a copy of this software and associated documentation files (the
+ * "Software"), to deal in the Software without restriction, including
+ * without limitation the rights to use, copy, modify, merge, publish,
+ * distribute, sublicense, and/or sell copies of the Software, and to
+ * permit persons to whom the Software is furnished to do so, subject to
+ * the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be
+ * included in all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+ * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+ * LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+ * OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+ * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ */
+#ifndef SHRPX_HTTP3_UPSTREAM_H
+#define SHRPX_HTTP3_UPSTREAM_H
+
+#include "shrpx.h"
+
+#include <ngtcp2/ngtcp2.h>
+#include <nghttp3/nghttp3.h>
+
+#include "shrpx_upstream.h"
+#include "shrpx_downstream_queue.h"
+#include "quic.h"
+#include "network.h"
+
+using namespace nghttp2;
+
+namespace shrpx {
+
+struct UpstreamAddr;
+
+class Http3Upstream : public Upstream {
+public:
+ Http3Upstream(ClientHandler *handler);
+ virtual ~Http3Upstream();
+
+ virtual int on_read();
+ virtual int on_write();
+ virtual int on_timeout(Downstream *downstream);
+ virtual int on_downstream_abort_request(Downstream *downstream,
+ unsigned int status_code);
+ virtual int
+ on_downstream_abort_request_with_https_redirect(Downstream *downstream);
+ virtual int downstream_read(DownstreamConnection *dconn);
+ virtual int downstream_write(DownstreamConnection *dconn);
+ virtual int downstream_eof(DownstreamConnection *dconn);
+ virtual int downstream_error(DownstreamConnection *dconn, int events);
+ virtual ClientHandler *get_client_handler() const;
+
+ virtual int on_downstream_header_complete(Downstream *downstream);
+ virtual int on_downstream_body(Downstream *downstream, const uint8_t *data,
+ size_t len, bool flush);
+ virtual int on_downstream_body_complete(Downstream *downstream);
+
+ virtual void on_handler_delete();
+ virtual int on_downstream_reset(Downstream *downstream, bool no_retry);
+
+ virtual void pause_read(IOCtrlReason reason);
+ virtual int resume_read(IOCtrlReason reason, Downstream *downstream,
+ size_t consumed);
+ virtual int send_reply(Downstream *downstream, const uint8_t *body,
+ size_t bodylen);
+
+ virtual int initiate_push(Downstream *downstream, const StringRef &uri);
+
+ virtual int response_riovec(struct iovec *iov, int iovcnt) const;
+ virtual void response_drain(size_t n);
+ virtual bool response_empty() const;
+
+ virtual Downstream *on_downstream_push_promise(Downstream *downstream,
+ int32_t promised_stream_id);
+ virtual int
+ on_downstream_push_promise_complete(Downstream *downstream,
+ Downstream *promised_downstream);
+ virtual bool push_enabled() const;
+ virtual void cancel_premature_downstream(Downstream *promised_downstream);
+
+ int init(const UpstreamAddr *faddr, const Address &remote_addr,
+ const Address &local_addr, const ngtcp2_pkt_hd &initial_hd,
+ const ngtcp2_cid *odcid, const uint8_t *token, size_t tokenlen);
+
+ int on_read(const UpstreamAddr *faddr, const Address &remote_addr,
+ const Address &local_addr, const ngtcp2_pkt_info &pi,
+ const uint8_t *data, size_t datalen);
+
+ int write_streams();
+
+ int handle_error();
+
+ int handle_expiry();
+ void reset_timer();
+
+ int setup_httpconn();
+ void add_pending_downstream(std::unique_ptr<Downstream> downstream);
+ int recv_stream_data(uint32_t flags, int64_t stream_id, const uint8_t *data,
+ size_t datalen);
+ int acked_stream_data_offset(int64_t stream_id, uint64_t datalen);
+ int extend_max_stream_data(int64_t stream_id);
+ void extend_max_remote_streams_bidi(uint64_t max_streams);
+ int error_reply(Downstream *downstream, unsigned int status_code);
+ void http_begin_request_headers(int64_t stream_id);
+ int http_recv_request_header(Downstream *downstream, int32_t token,
+ nghttp3_rcbuf *name, nghttp3_rcbuf *value,
+ uint8_t flags, bool trailer);
+ int http_end_request_headers(Downstream *downstream, int fin);
+ int http_end_stream(Downstream *downstream);
+ void start_downstream(Downstream *downstream);
+ void initiate_downstream(Downstream *downstream);
+ int shutdown_stream(Downstream *downstream, uint64_t app_error_code);
+ int shutdown_stream_read(int64_t stream_id, uint64_t app_error_code);
+ int http_stream_close(Downstream *downstream, uint64_t app_error_code);
+ void consume(int64_t stream_id, size_t nconsumed);
+ void remove_downstream(Downstream *downstream);
+ int stream_close(int64_t stream_id, uint64_t app_error_code);
+ void log_response_headers(Downstream *downstream,
+ const std::vector<nghttp3_nv> &nva) const;
+ int http_acked_stream_data(Downstream *downstream, uint64_t datalen);
+ int http_shutdown_stream_read(int64_t stream_id);
+ int http_reset_stream(int64_t stream_id, uint64_t app_error_code);
+ int http_stop_sending(int64_t stream_id, uint64_t app_error_code);
+ int http_recv_data(Downstream *downstream, const uint8_t *data,
+ size_t datalen);
+ int handshake_completed();
+ int check_shutdown();
+ int start_graceful_shutdown();
+ int submit_goaway();
+ int send_packet(const UpstreamAddr *faddr, const sockaddr *remote_sa,
+ size_t remote_salen, const sockaddr *local_sa,
+ size_t local_salen, const ngtcp2_pkt_info &pi,
+ const uint8_t *data, size_t datalen, size_t gso_size);
+
+ void qlog_write(const void *data, size_t datalen, bool fin);
+ int open_qlog_file(const StringRef &dir, const ngtcp2_cid &scid) const;
+
+ void on_send_blocked(const UpstreamAddr *faddr,
+ const ngtcp2_addr &remote_addr,
+ const ngtcp2_addr &local_addr, const ngtcp2_pkt_info &pi,
+ const uint8_t *data, size_t datalen, size_t gso_size);
+ int send_blocked_packet();
+ void signal_write_upstream_addr(const UpstreamAddr *faddr);
+
+ ngtcp2_conn *get_conn() const;
+
+private:
+ ClientHandler *handler_;
+ ev_timer timer_;
+ ev_timer shutdown_timer_;
+ ev_prepare prep_;
+ int qlog_fd_;
+ ngtcp2_cid hashed_scid_;
+ ngtcp2_conn *conn_;
+ ngtcp2_connection_close_error last_error_;
+ nghttp3_conn *httpconn_;
+ DownstreamQueue downstream_queue_;
+ bool retry_close_;
+ std::vector<uint8_t> conn_close_;
+
+ struct {
+ bool send_blocked;
+ size_t num_blocked;
+ size_t num_blocked_sent;
+ // blocked field is effective only when send_blocked is true.
+ struct {
+ const UpstreamAddr *faddr;
+ Address local_addr;
+ Address remote_addr;
+ ngtcp2_pkt_info pi;
+ const uint8_t *data;
+ size_t datalen;
+ size_t gso_size;
+ } blocked[2];
+ std::unique_ptr<uint8_t[]> data;
+ } tx_;
+};
+
+} // namespace shrpx
+
+#endif // SHRPX_HTTP3_UPSTREAM_H