n_http2.h

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/*
 * Nilorea Library
 * Copyright (C) 2005-2026 Castagnier Mickael
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
 * implied. See the License for the specific language governing
 * permissions and limitations under the License.
 *
 * SPDX-License-Identifier: Apache-2.0
 */
 
#ifndef __NILOREA_HTTP2_HEADER
#define __NILOREA_HTTP2_HEADER
 
#ifdef __cplusplus
extern "C" {
#endif
 
#include <stddef.h>
#include <stdint.h>
 
#define N_H2_PREFACE "PRI * HTTP/2.0\r\n\r\nSM\r\n\r\n"
#define N_H2_FRAME_HEADER_LEN 9
#define N_H2_MAX_FRAME_PAYLOAD 16384
 
#define N_H2_DATA 0x0          
#define N_H2_HEADERS 0x1       
#define N_H2_PRIORITY 0x2      
#define N_H2_RST_STREAM 0x3    
#define N_H2_SETTINGS 0x4      
#define N_H2_PUSH_PROMISE 0x5  
#define N_H2_PING 0x6          
#define N_H2_GOAWAY 0x7        
#define N_H2_WINDOW_UPDATE 0x8 
#define N_H2_CONTINUATION 0x9  
#define N_H2_FLAG_END_STREAM 0x1  
#define N_H2_FLAG_ACK 0x1         
#define N_H2_FLAG_END_HEADERS 0x4 
#define N_H2_FLAG_PADDED 0x8      
#define N_H2_FLAG_PRIORITY 0x20   
#define N_H2_SETTINGS_HEADER_TABLE_SIZE 0x1
#define N_H2_SETTINGS_ENABLE_PUSH 0x2
#define N_H2_SETTINGS_MAX_CONCURRENT_STREAMS 0x3
#define N_H2_SETTINGS_INITIAL_WINDOW_SIZE 0x4
#define N_H2_SETTINGS_MAX_FRAME_SIZE 0x5
#define N_H2_SETTINGS_MAX_HEADER_LIST_SIZE 0x6
typedef struct N_H2_FRAME {
    uint32_t length;              
    int type;                     
    int flags;                    
    uint32_t stream_id;           
    const unsigned char* payload; 
} N_H2_FRAME;
 
typedef struct N_H2_SETTING {
    uint16_t id;    
    uint32_t value; 
} N_H2_SETTING;
 
int n_http2_frame_parse(const unsigned char* buf, size_t len, N_H2_FRAME* frame, size_t* consumed);
 
size_t n_http2_frame_build_header(unsigned char* out, size_t out_cap, uint32_t length, int type, int flags, uint32_t stream_id);
 
int n_http2_settings_parse(const unsigned char* payload, size_t len, N_H2_SETTING* out, size_t max, size_t* count);
 
#define N_H2_HPACK_DEFAULT_TABLE_SIZE 4096
 
typedef struct N_H2_HEADER {
    char* name;  
    char* value; 
} N_H2_HEADER;
 
typedef struct N_H2_HPACK N_H2_HPACK;
 
N_H2_HPACK* n_http2_hpack_new(size_t max_table_size);
 
void n_http2_hpack_free(N_H2_HPACK** ctx);
 
void n_http2_hpack_set_max_size(N_H2_HPACK* ctx, size_t max_table_size);
 
int n_http2_hpack_decode(N_H2_HPACK* ctx, const unsigned char* block, size_t len, N_H2_HEADER* out, size_t max_out, size_t* count);
 
size_t n_http2_hpack_encode(const N_H2_HEADER* headers, size_t n, unsigned char* out, size_t out_cap);
 
void n_http2_hpack_headers_free(N_H2_HEADER* headers, size_t n);
 
#ifdef __cplusplus
}
#endif
 
#endif /* __NILOREA_HTTP2_HEADER */