/usr/include/pion/spdy/parser.hpp is in libpion-dev 5.0.4+dfsg-2.
This file is owned by root:root, with mode 0o644.
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// pion: a Boost C++ framework for building lightweight HTTP interfaces
// ---------------------------------------------------------------------
// Copyright (C) 2007-2012 Cloudmeter, Inc. (http://www.cloudmeter.com)
//
// Distributed under the Boost Software License, Version 1.0.
// See http://www.boost.org/LICENSE_1_0.txt
//
#ifndef __PION_SPDYPARSER_HEADER__
#define __PION_SPDYPARSER_HEADER__
#include <boost/shared_ptr.hpp>
#include <boost/logic/tribool.hpp>
#include <boost/system/error_code.hpp>
#include <boost/thread/once.hpp>
#include <pion/config.hpp>
#include <pion/logger.hpp>
#include <pion/spdy/types.hpp>
#include <pion/spdy/decompressor.hpp>
namespace pion { // begin namespace pion
namespace spdy { // begin namespace spdy
///
/// parser : parsers and reads the SPDY frames
///
class PION_API parser
{
public:
/// class-specific error code values
enum error_value_t {
ERROR_INVALID_SPDY_FRAME = 1,
ERROR_INVALID_SPDY_VERSION,
ERROR_DECOMPRESSION,
ERROR_PROTOCOL_ERROR,
ERROR_INTERNAL_SPDY_ERROR,
ERROR_MISSING_HEADER_DATA
};
/// class-specific error category
class error_category_t
: public boost::system::error_category
{
public:
const char *name() const { return "SPDYParser"; }
std::string message(int ev) const {
switch (ev) {
case ERROR_INVALID_SPDY_FRAME:
return "invalid spdy frame";
case ERROR_INVALID_SPDY_VERSION:
return "invalid spdy version";
case ERROR_DECOMPRESSION:
return "error in decompression";
case ERROR_MISSING_HEADER_DATA:
return "missing header data";
}
return "SPDYParser error";
}
};
/// constructs a new parser object (default constructor)
parser();
/// destructor
~parser() {}
/**
* parse a SPDY packet
*
* @return boost::tribool result of parsing:
* false = SPDY frame has an error,
* true = finished parsing SPDY frame,
* indeterminate = not yet finished parsing SPDY frame
*/
boost::tribool parse(http_protocol_info& http_headers,
boost::system::error_code& ec,
decompressor_ptr& decompressor,
const char *packet_ptr,
boost::uint32_t& length_packet,
boost::uint32_t current_stream_count);
/// Get the pointer to the first character to the spdy data contect
const char * get_spdy_data_content( ) { return m_last_data_chunk_ptr; }
/// Get the pointer to the first character to the spdy data contect
const char * get_spdy_read_pointer( ) { return m_read_ptr; }
/**
* checks if the frame is spdy frame or not
*
* @return true if it is a frame else returns false
*/
static spdy_frame_type get_spdy_frame_type(const char *ptr);
/**
* checks if the frame is spdy control frame or not
*
* @return true if it is a control frame else returns false
*/
static bool is_spdy_control_frame(const char *ptr);
/**
* get the stream id for the spdy control frame
*
* @return true if it is a control frame else returns false
*/
static boost::uint32_t get_control_frame_stream_id(const char *ptr);
protected:
/// resets the read pointer
inline void set_read_ptr(const char *ptr) { m_read_ptr = m_current_data_chunk_ptr = ptr; }
/// populates the frame for every spdy packet
/// Returns false if there was an error else returns true
bool populate_frame(boost::system::error_code& ec,
spdy_control_frame_info& frame,
boost::uint32_t& length_packet,
boost::uint32_t& stream_id,
http_protocol_info& http_headers);
/// creates the unique parser error_category_t
static void create_error_category(void);
/// returns an instance of parser::error_category_t
static inline error_category_t& get_error_category(void) {
boost::call_once(parser::create_error_category, m_instance_flag);
return *m_error_category_ptr;
}
/**
* sets an error code
*
* @param ec error code variable to define
* @param ev error value to raise
*/
static inline void set_error(boost::system::error_code& ec, error_value_t ev) {
ec = boost::system::error_code(static_cast<int>(ev), get_error_category());
}
/**
* parses an the header payload for SPDY
*
*/
void parse_header_payload(boost::system::error_code& ec,
decompressor_ptr& decompressor,
const spdy_control_frame_info& frame,
http_protocol_info& http_headers,
boost::uint32_t current_stream_count);
/**
* parses the data for SPDY
*
*/
void parse_spdy_data(boost::system::error_code& ec,
const spdy_control_frame_info& frame,
boost::uint32_t stream_id,
http_protocol_info& http_info);
/**
* parses an the Settings Frame for SPDY
*
*/
void parse_spdy_settings_frame(boost::system::error_code& ec,
const spdy_control_frame_info& frame);
/**
* parses an the RST stream for SPDY
*
*/
void parse_spdy_rst_stream(boost::system::error_code& ec,
const spdy_control_frame_info& frame);
/**
* parses an the Ping Frame for SPDY
*
*/
void parse_spdy_ping_frame(boost::system::error_code& ec,
const spdy_control_frame_info& frame);
/**
* parses an the GoAway Frame for SPDY
*
*/
void parse_spdy_goaway_frame(boost::system::error_code& ec,
const spdy_control_frame_info& frame);
/**
* parses an the WindowUpdate Frame for SPDY
*
*/
void parse_spdy_window_update_frame(boost::system::error_code& ec,
const spdy_control_frame_info& frame);
/**
* parse a SPDY frame (protected implementation)
*
* @return boost::tribool result of parsing:
* false = SPDY frame has an error,
* true = finished parsing SPDY frame,
* indeterminate = not yet finished parsing SPDY frame
*/
boost::tribool parse_spdy_frame(boost::system::error_code& ec,
decompressor_ptr& decompressor,
http_protocol_info& http_headers,
boost::uint32_t& length_packet,
boost::uint32_t current_stream_count);
private:
/// generic read pointer which parses the spdy data
const char * m_read_ptr;
/// points to the first character of the uncompressed http headers
const char * m_uncompressed_ptr;
/// SPDY has interleaved frames and this will point to start of the current chunk data
const char * m_current_data_chunk_ptr;
/// SPDY has interleaved frames and this will point to start of the the last chunk data
const char * m_last_data_chunk_ptr;
/// primary logging interface used by this class
mutable logger m_logger;
/// points to a single and unique instance of the HTTPParser ErrorCategory
static error_category_t * m_error_category_ptr;
/// used to ensure thread safety of the HTTPParser ErrorCategory
static boost::once_flag m_instance_flag;
};
/// data type for a spdy reader pointer
typedef boost::shared_ptr<parser> parser_ptr;
} // end namespace spdy
} // end namespace pion
#endif
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