legacy-libs/grpc/deps/grpc/src/core/ext/transport/chttp2/transport/frame_settings.h

   1 /*
   2  *
   3  * Copyright 2015 gRPC authors.
   4  *
   5  * Licensed under the Apache License, Version 2.0 (the "License");
   6  * you may not use this file except in compliance with the License.
   7  * You may obtain a copy of the License at
   8  *
   9  *     http://www.apache.org/licenses/LICENSE-2.0
  10  *
  11  * Unless required by applicable law or agreed to in writing, software
  12  * distributed under the License is distributed on an "AS IS" BASIS,
  13  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  14  * See the License for the specific language governing permissions and
  15  * limitations under the License.
  16  *
  17  */
  18
  19 #ifndef GRPC_CORE_EXT_TRANSPORT_CHTTP2_TRANSPORT_FRAME_SETTINGS_H
  20 #define GRPC_CORE_EXT_TRANSPORT_CHTTP2_TRANSPORT_FRAME_SETTINGS_H
  21
  22 #include <grpc/support/port_platform.h>
  23
  24 #include <grpc/slice.h>
  25 #include "src/core/ext/transport/chttp2/transport/frame.h"
  26 #include "src/core/ext/transport/chttp2/transport/http2_settings.h"
  27
  28 typedef enum {
  29   GRPC_CHTTP2_SPS_ID0,
  30   GRPC_CHTTP2_SPS_ID1,
  31   GRPC_CHTTP2_SPS_VAL0,
  32   GRPC_CHTTP2_SPS_VAL1,
  33   GRPC_CHTTP2_SPS_VAL2,
  34   GRPC_CHTTP2_SPS_VAL3
  35 } grpc_chttp2_settings_parse_state;
  36
  37 typedef struct {
  38   grpc_chttp2_settings_parse_state state;
  39   uint32_t* target_settings;
  40   uint8_t is_ack;
  41   uint16_t id;
  42   uint32_t value;
  43   uint32_t incoming_settings[GRPC_CHTTP2_NUM_SETTINGS];
  44 } grpc_chttp2_settings_parser;
  45
  46 /* Create a settings frame by diffing old & new, and updating old to be new */
  47 grpc_slice grpc_chttp2_settings_create(uint32_t* old, const uint32_t* newval,
  48                                        uint32_t force_mask, size_t count);
  49 /* Create an ack settings frame */
  50 grpc_slice grpc_chttp2_settings_ack_create(void);
  51
  52 grpc_error* grpc_chttp2_settings_parser_begin_frame(
  53     grpc_chttp2_settings_parser* parser, uint32_t length, uint8_t flags,
  54     uint32_t* settings);
  55 grpc_error* grpc_chttp2_settings_parser_parse(void* parser,
  56                                               grpc_chttp2_transport* t,
  57                                               grpc_chttp2_stream* s,
  58                                               const grpc_slice& slice,
  59                                               int is_last);
  60
  61 #endif /* GRPC_CORE_EXT_TRANSPORT_CHTTP2_TRANSPORT_FRAME_SETTINGS_H */