frame.h

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/*
 * Copyright (c) 2023, Emna Rekik
 *
 * SPDX-License-Identifier: Apache-2.0
 */

 
#ifndef ZEPHYR_INCLUDE_NET_HTTP_FRAME_H_
#define ZEPHYR_INCLUDE_NET_HTTP_FRAME_H_
 
#include <stdint.h>
 
#include <zephyr/toolchain.h>
 
#ifdef __cplusplus
extern "C" {
#endif

enum http2_frame_type {
        HTTP2_DATA_FRAME = 0x00,
        HTTP2_HEADERS_FRAME = 0x01,
        HTTP2_PRIORITY_FRAME = 0x02,
        HTTP2_RST_STREAM_FRAME = 0x03,
        HTTP2_SETTINGS_FRAME = 0x04,
        HTTP2_PUSH_PROMISE_FRAME = 0x05,
        HTTP2_PING_FRAME = 0x06,
        HTTP2_GOAWAY_FRAME = 0x07,
        HTTP2_WINDOW_UPDATE_FRAME = 0x08,
        HTTP2_CONTINUATION_FRAME = 0x09
};

 
#define HTTP2_FLAG_SETTINGS_ACK 0x01
#define HTTP2_FLAG_END_HEADERS  0x04
#define HTTP2_FLAG_END_STREAM   0x01
#define HTTP2_FLAG_PADDED       0x08
#define HTTP2_FLAG_PRIORITY     0x20
 
#define HTTP2_FRAME_HEADER_SIZE      9
#define HTTP2_FRAME_LENGTH_OFFSET    0
#define HTTP2_FRAME_TYPE_OFFSET      3
#define HTTP2_FRAME_FLAGS_OFFSET     4
#define HTTP2_FRAME_STREAM_ID_OFFSET 5
#define HTTP2_FRAME_STREAM_ID_MASK   0x7FFFFFFF
 
#define HTTP2_HEADERS_FRAME_PRIORITY_LEN 5
#define HTTP2_PRIORITY_FRAME_LEN 5
#define HTTP2_RST_STREAM_FRAME_LEN 4


struct http2_settings_field {
        uint16_t id;    
        uint32_t value; 
} __packed;

enum http2_settings {
        HTTP2_SETTINGS_HEADER_TABLE_SIZE = 1,
        HTTP2_SETTINGS_ENABLE_PUSH = 2,
        HTTP2_SETTINGS_MAX_CONCURRENT_STREAMS = 3,
        HTTP2_SETTINGS_INITIAL_WINDOW_SIZE = 4,
        HTTP2_SETTINGS_MAX_FRAME_SIZE = 5,
        HTTP2_SETTINGS_MAX_HEADER_LIST_SIZE = 6,
};
 
#ifdef __cplusplus
}
#endif
 
#endif /* ZEPHYR_INCLUDE_NET_HTTP_FRAME_H_ */