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naiveproxy/net/spdy/buffered_spdy_framer.h
klzgrad 46caed9b9c Import chromium-70.0.3538.110
2018-12-09 21:59:24 -05:00

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// Copyright (c) 2012 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef NET_SPDY_BUFFERED_SPDY_FRAMER_H_
#define NET_SPDY_BUFFERED_SPDY_FRAMER_H_
#include <stddef.h>
#include <stdint.h>
#include <memory>
#include <string>
#include "base/macros.h"
#include "base/strings/string_piece.h"
#include "net/base/net_export.h"
#include "net/log/net_log_source.h"
#include "net/spdy/header_coalescer.h"
#include "net/third_party/spdy/core/http2_frame_decoder_adapter.h"
#include "net/third_party/spdy/core/spdy_alt_svc_wire_format.h"
#include "net/third_party/spdy/core/spdy_framer.h"
#include "net/third_party/spdy/core/spdy_header_block.h"
#include "net/third_party/spdy/core/spdy_protocol.h"
namespace net {
class NET_EXPORT_PRIVATE BufferedSpdyFramerVisitorInterface {
public:
BufferedSpdyFramerVisitorInterface() {}
// Called if an error is detected in the spdy::SpdySerializedFrame protocol.
virtual void OnError(
http2::Http2DecoderAdapter::SpdyFramerError spdy_framer_error) = 0;
// Called if an error is detected in a HTTP2 stream.
virtual void OnStreamError(spdy::SpdyStreamId stream_id,
const std::string& description) = 0;
// Called after all the header data for HEADERS control frame is received.
virtual void OnHeaders(spdy::SpdyStreamId stream_id,
bool has_priority,
int weight,
spdy::SpdyStreamId parent_stream_id,
bool exclusive,
bool fin,
spdy::SpdyHeaderBlock headers) = 0;
// Called when a data frame header is received.
virtual void OnDataFrameHeader(spdy::SpdyStreamId stream_id,
size_t length,
bool fin) = 0;
// Called when data is received.
// |stream_id| The stream receiving data.
// |data| A buffer containing the data received.
// |len| The length of the data buffer (at most 2^16 - 1 - 8).
virtual void OnStreamFrameData(spdy::SpdyStreamId stream_id,
const char* data,
size_t len) = 0;
// Called when the other side has finished sending data on this stream.
// |stream_id| The stream that was receivin data.
virtual void OnStreamEnd(spdy::SpdyStreamId stream_id) = 0;
// Called when padding is received (padding length field or padding octets).
// |stream_id| The stream receiving data.
// |len| The number of padding octets.
virtual void OnStreamPadding(spdy::SpdyStreamId stream_id, size_t len) = 0;
// Called when a SETTINGS frame is received.
virtual void OnSettings() = 0;
// Called when an individual setting within a SETTINGS frame has been parsed.
// Note that |id| may or may not be a SETTINGS ID defined in the HTTP/2 spec.
virtual void OnSetting(spdy::SpdySettingsId id, uint32_t value) = 0;
// Called when a SETTINGS frame is received with the ACK flag set.
virtual void OnSettingsAck() = 0;
// Called at the completion of parsing SETTINGS id and value tuples.
virtual void OnSettingsEnd() = 0;
// Called when a PING frame has been parsed.
virtual void OnPing(spdy::SpdyPingId unique_id, bool is_ack) = 0;
// Called when a RST_STREAM frame has been parsed.
virtual void OnRstStream(spdy::SpdyStreamId stream_id,
spdy::SpdyErrorCode error_code) = 0;
// Called when a GOAWAY frame has been parsed.
virtual void OnGoAway(spdy::SpdyStreamId last_accepted_stream_id,
spdy::SpdyErrorCode error_code,
base::StringPiece debug_data) = 0;
// Called when a WINDOW_UPDATE frame has been parsed.
virtual void OnWindowUpdate(spdy::SpdyStreamId stream_id,
int delta_window_size) = 0;
// Called when a PUSH_PROMISE frame has been parsed.
virtual void OnPushPromise(spdy::SpdyStreamId stream_id,
spdy::SpdyStreamId promised_stream_id,
spdy::SpdyHeaderBlock headers) = 0;
// Called when an ALTSVC frame has been parsed.
virtual void OnAltSvc(
spdy::SpdyStreamId stream_id,
base::StringPiece origin,
const spdy::SpdyAltSvcWireFormat::AlternativeServiceVector&
altsvc_vector) = 0;
// Called when a frame type we don't recognize is received.
// Return true if this appears to be a valid extension frame, false otherwise.
// We distinguish between extension frames and nonsense by checking
// whether the stream id is valid.
virtual bool OnUnknownFrame(spdy::SpdyStreamId stream_id,
uint8_t frame_type) = 0;
protected:
virtual ~BufferedSpdyFramerVisitorInterface() {}
private:
DISALLOW_COPY_AND_ASSIGN(BufferedSpdyFramerVisitorInterface);
};
class NET_EXPORT_PRIVATE BufferedSpdyFramer
: public spdy::SpdyFramerVisitorInterface {
public:
BufferedSpdyFramer(uint32_t max_header_list_size,
const NetLogWithSource& net_log);
BufferedSpdyFramer() = delete;
~BufferedSpdyFramer() override;
// Sets callbacks to be called from the buffered spdy framer. A visitor must
// be set, or else the framer will likely crash. It is acceptable for the
// visitor to do nothing. If this is called multiple times, only the last
// visitor will be used.
void set_visitor(BufferedSpdyFramerVisitorInterface* visitor);
// Set debug callbacks to be called from the framer. The debug visitor is
// completely optional and need not be set in order for normal operation.
// If this is called multiple times, only the last visitor will be used.
void set_debug_visitor(spdy::SpdyFramerDebugVisitorInterface* debug_visitor);
// spdy::SpdyFramerVisitorInterface
void OnError(
http2::Http2DecoderAdapter::SpdyFramerError spdy_framer_error) override;
void OnHeaders(spdy::SpdyStreamId stream_id,
bool has_priority,
int weight,
spdy::SpdyStreamId parent_stream_id,
bool exclusive,
bool fin,
bool end) override;
void OnStreamFrameData(spdy::SpdyStreamId stream_id,
const char* data,
size_t len) override;
void OnStreamEnd(spdy::SpdyStreamId stream_id) override;
void OnStreamPadLength(spdy::SpdyStreamId stream_id, size_t value) override;
void OnStreamPadding(spdy::SpdyStreamId stream_id, size_t len) override;
spdy::SpdyHeadersHandlerInterface* OnHeaderFrameStart(
spdy::SpdyStreamId stream_id) override;
void OnHeaderFrameEnd(spdy::SpdyStreamId stream_id) override;
void OnSettings() override;
void OnSetting(spdy::SpdySettingsId id, uint32_t value) override;
void OnSettingsAck() override;
void OnSettingsEnd() override;
void OnPing(spdy::SpdyPingId unique_id, bool is_ack) override;
void OnRstStream(spdy::SpdyStreamId stream_id,
spdy::SpdyErrorCode error_code) override;
void OnGoAway(spdy::SpdyStreamId last_accepted_stream_id,
spdy::SpdyErrorCode error_code) override;
bool OnGoAwayFrameData(const char* goaway_data, size_t len) override;
void OnWindowUpdate(spdy::SpdyStreamId stream_id,
int delta_window_size) override;
void OnPushPromise(spdy::SpdyStreamId stream_id,
spdy::SpdyStreamId promised_stream_id,
bool end) override;
void OnAltSvc(spdy::SpdyStreamId stream_id,
base::StringPiece origin,
const spdy::SpdyAltSvcWireFormat::AlternativeServiceVector&
altsvc_vector) override;
void OnDataFrameHeader(spdy::SpdyStreamId stream_id,
size_t length,
bool fin) override;
void OnContinuation(spdy::SpdyStreamId stream_id, bool end) override;
void OnPriority(spdy::SpdyStreamId stream_id,
spdy::SpdyStreamId parent_stream_id,
int weight,
bool exclusive) override {}
bool OnUnknownFrame(spdy::SpdyStreamId stream_id,
uint8_t frame_type) override;
// spdy::SpdyFramer methods.
size_t ProcessInput(const char* data, size_t len);
void UpdateHeaderDecoderTableSize(uint32_t value);
void Reset();
http2::Http2DecoderAdapter::SpdyFramerError spdy_framer_error() const;
http2::Http2DecoderAdapter::SpdyState state() const;
bool MessageFullyRead();
bool HasError();
std::unique_ptr<spdy::SpdySerializedFrame> CreateRstStream(
spdy::SpdyStreamId stream_id,
spdy::SpdyErrorCode error_code) const;
std::unique_ptr<spdy::SpdySerializedFrame> CreateSettings(
const spdy::SettingsMap& values) const;
std::unique_ptr<spdy::SpdySerializedFrame> CreatePingFrame(
spdy::SpdyPingId unique_id,
bool is_ack) const;
std::unique_ptr<spdy::SpdySerializedFrame> CreateWindowUpdate(
spdy::SpdyStreamId stream_id,
uint32_t delta_window_size) const;
std::unique_ptr<spdy::SpdySerializedFrame> CreateDataFrame(
spdy::SpdyStreamId stream_id,
const char* data,
uint32_t len,
spdy::SpdyDataFlags flags);
std::unique_ptr<spdy::SpdySerializedFrame> CreatePriority(
spdy::SpdyStreamId stream_id,
spdy::SpdyStreamId dependency_id,
int weight,
bool exclusive) const;
// Serialize a frame of unknown type.
spdy::SpdySerializedFrame SerializeFrame(const spdy::SpdyFrameIR& frame) {
return spdy_framer_.SerializeFrame(frame);
}
int frames_received() const { return frames_received_; }
// Returns the estimate of dynamically allocated memory in bytes.
size_t EstimateMemoryUsage() const;
private:
spdy::SpdyFramer spdy_framer_;
http2::Http2DecoderAdapter deframer_;
BufferedSpdyFramerVisitorInterface* visitor_;
int frames_received_;
// Collection of fields from control frames that we need to
// buffer up from the spdy framer.
struct ControlFrameFields {
spdy::SpdyFrameType type;
spdy::SpdyStreamId stream_id;
spdy::SpdyStreamId associated_stream_id;
spdy::SpdyStreamId promised_stream_id;
bool has_priority;
spdy::SpdyPriority priority;
int weight;
spdy::SpdyStreamId parent_stream_id;
bool exclusive;
bool fin;
bool unidirectional;
};
std::unique_ptr<ControlFrameFields> control_frame_fields_;
// Collection of fields of a GOAWAY frame that this class needs to buffer.
struct GoAwayFields {
spdy::SpdyStreamId last_accepted_stream_id;
spdy::SpdyErrorCode error_code;
std::string debug_data;
// Returns the estimate of dynamically allocated memory in bytes.
size_t EstimateMemoryUsage() const;
};
std::unique_ptr<GoAwayFields> goaway_fields_;
std::unique_ptr<HeaderCoalescer> coalescer_;
const uint32_t max_header_list_size_;
NetLogWithSource net_log_;
DISALLOW_COPY_AND_ASSIGN(BufferedSpdyFramer);
};
} // namespace net
#endif // NET_SPDY_BUFFERED_SPDY_FRAMER_H_
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