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 grpc_slice slice, int is_last); 59 60 #endif /* GRPC_CORE_EXT_TRANSPORT_CHTTP2_TRANSPORT_FRAME_SETTINGS_H */ 61