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/*
*
* Copyright 2014, Google Inc.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are
* met:
*
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above
* copyright notice, this list of conditions and the following disclaimer
* in the documentation and/or other materials provided with the
* distribution.
* * Neither the name of Google Inc. nor the names of its
* contributors may be used to endorse or promote products derived from
* this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
*/
#ifndef __GRPC_INTERNAL_TRANSPORT_CHTTP2_FRAME_SETTINGS_H__
#define __GRPC_INTERNAL_TRANSPORT_CHTTP2_FRAME_SETTINGS_H__
#include <grpc/support/port_platform.h>
#include <grpc/support/slice.h>
#include "src/core/transport/chttp2/frame.h"
typedef enum {
GRPC_CHTTP2_SPS_ID0,
GRPC_CHTTP2_SPS_ID1,
GRPC_CHTTP2_SPS_VAL0,
GRPC_CHTTP2_SPS_VAL1,
GRPC_CHTTP2_SPS_VAL2,
GRPC_CHTTP2_SPS_VAL3
} grpc_chttp2_settings_parse_state;
/* The things HTTP/2 defines as connection level settings */
typedef enum {
GRPC_CHTTP2_SETTINGS_HEADER_TABLE_SIZE = 1,
GRPC_CHTTP2_SETTINGS_ENABLE_PUSH = 2,
GRPC_CHTTP2_SETTINGS_MAX_CONCURRENT_STREAMS = 3,
GRPC_CHTTP2_SETTINGS_INITIAL_WINDOW_SIZE = 4,
GRPC_CHTTP2_SETTINGS_MAX_FRAME_SIZE = 5,
GRPC_CHTTP2_SETTINGS_MAX_HEADER_LIST_SIZE = 6,
GRPC_CHTTP2_NUM_SETTINGS
} grpc_chttp2_setting_id;
typedef struct {
grpc_chttp2_settings_parse_state state;
gpr_uint32 *target_settings;
gpr_uint8 is_ack;
gpr_uint16 id;
gpr_uint32 value;
gpr_uint32 incoming_settings[GRPC_CHTTP2_NUM_SETTINGS];
} grpc_chttp2_settings_parser;
typedef enum {
GRPC_CHTTP2_CLAMP_INVALID_VALUE,
GRPC_CHTTP2_DISCONNECT_ON_INVALID_VALUE
} grpc_chttp2_invalid_value_behavior;
typedef struct {
const char *name;
gpr_uint32 default_value;
gpr_uint32 min_value;
gpr_uint32 max_value;
grpc_chttp2_invalid_value_behavior invalid_value_behavior;
} grpc_chttp2_setting_parameters;
/* HTTP/2 mandated connection setting parameters */
extern const grpc_chttp2_setting_parameters
grpc_chttp2_settings_parameters[GRPC_CHTTP2_NUM_SETTINGS];
/* Create a settings frame by diffing old & new, and updating old to be new */
gpr_slice grpc_chttp2_settings_create(gpr_uint32 *old, const gpr_uint32 *new,
gpr_uint32 force_mask, size_t count);
/* Create an ack settings frame */
gpr_slice grpc_chttp2_settings_ack_create(void);
grpc_chttp2_parse_error grpc_chttp2_settings_parser_begin_frame(
grpc_chttp2_settings_parser *parser, gpr_uint32 length, gpr_uint8 flags,
gpr_uint32 *settings);
grpc_chttp2_parse_error grpc_chttp2_settings_parser_parse(
void *parser, grpc_chttp2_parse_state *state, gpr_slice slice, int is_last);
#endif /* __GRPC_INTERNAL_TRANSPORT_CHTTP2_FRAME_SETTINGS_H__ */
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