| /* |
| * |
| * Copyright 2015-2016, 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_CORE_TRANSPORT_CHTTP2_FRAME_SETTINGS_H |
| #define GRPC_CORE_TRANSPORT_CHTTP2_FRAME_SETTINGS_H |
| |
| #include <grpc/support/port_platform.h> |
| #include <grpc/support/slice.h> |
| #include "src/core/transport/chttp2/frame.h" |
| #include "src/core/iomgr/exec_ctx.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; |
| uint32_t *target_settings; |
| uint8_t is_ack; |
| uint16_t id; |
| uint32_t value; |
| uint32_t 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; |
| uint32_t default_value; |
| uint32_t min_value; |
| uint32_t max_value; |
| grpc_chttp2_invalid_value_behavior invalid_value_behavior; |
| uint32_t error_value; |
| } 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(uint32_t *old, const uint32_t *new, |
| uint32_t 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, uint32_t length, uint8_t flags, |
| uint32_t *settings); |
| grpc_chttp2_parse_error grpc_chttp2_settings_parser_parse( |
| grpc_exec_ctx *exec_ctx, void *parser, |
| grpc_chttp2_transport_parsing *transport_parsing, |
| grpc_chttp2_stream_parsing *stream_parsing, gpr_slice slice, int is_last); |
| |
| #endif /* GRPC_CORE_TRANSPORT_CHTTP2_FRAME_SETTINGS_H */ |