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/*
* nghttp3
*
* Copyright (c) 2019 nghttp3 contributors
* Copyright (c) 2015 nghttp2 contributors
*
* Permission is hereby granted, free of charge, to any person obtaining
* a copy of this software and associated documentation files (the
* "Software"), to deal in the Software without restriction, including
* without limitation the rights to use, copy, modify, merge, publish,
* distribute, sublicense, and/or sell copies of the Software, and to
* permit persons to whom the Software is furnished to do so, subject to
* the following conditions:
*
* The above copyright notice and this permission notice shall be
* included in all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
* LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
* OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
* WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
*/
#ifndef NGHTTP3_HTTP_H
#define NGHTTP3_HTTP_H
#ifdef HAVE_CONFIG_H
# include <config.h>
#endif /* HAVE_CONFIG_H */
#include <nghttp3/nghttp3.h>
typedef struct nghttp3_stream nghttp3_stream;
typedef struct nghttp3_http_state nghttp3_http_state;
/* HTTP related flags to enforce HTTP semantics */
/* NGHTTP3_HTTP_FLAG_NONE indicates that no flag is set. */
#define NGHTTP3_HTTP_FLAG_NONE 0x00u
/* header field seen so far */
#define NGHTTP3_HTTP_FLAG__AUTHORITY 0x01u
#define NGHTTP3_HTTP_FLAG__PATH 0x02u
#define NGHTTP3_HTTP_FLAG__METHOD 0x04u
#define NGHTTP3_HTTP_FLAG__SCHEME 0x08u
/* host is not pseudo header, but we require either host or
:authority */
#define NGHTTP3_HTTP_FLAG_HOST 0x10u
#define NGHTTP3_HTTP_FLAG__STATUS 0x20u
/* required header fields for HTTP request except for CONNECT
method. */
#define NGHTTP3_HTTP_FLAG_REQ_HEADERS \
(NGHTTP3_HTTP_FLAG__METHOD | NGHTTP3_HTTP_FLAG__PATH | \
NGHTTP3_HTTP_FLAG__SCHEME)
#define NGHTTP3_HTTP_FLAG_PSEUDO_HEADER_DISALLOWED 0x40u
/* HTTP method flags */
#define NGHTTP3_HTTP_FLAG_METH_CONNECT 0x80u
#define NGHTTP3_HTTP_FLAG_METH_HEAD 0x0100u
#define NGHTTP3_HTTP_FLAG_METH_OPTIONS 0x0200u
#define NGHTTP3_HTTP_FLAG_METH_ALL \
(NGHTTP3_HTTP_FLAG_METH_CONNECT | NGHTTP3_HTTP_FLAG_METH_HEAD | \
NGHTTP3_HTTP_FLAG_METH_OPTIONS)
/* :path category */
/* path starts with "/" */
#define NGHTTP3_HTTP_FLAG_PATH_REGULAR 0x0400u
/* path "*" */
#define NGHTTP3_HTTP_FLAG_PATH_ASTERISK 0x0800u
/* scheme */
/* "http" or "https" scheme */
#define NGHTTP3_HTTP_FLAG_SCHEME_HTTP 0x1000u
/* set if final response is expected */
#define NGHTTP3_HTTP_FLAG_EXPECT_FINAL_RESPONSE 0x2000u
/* NGHTTP3_HTTP_FLAG__PROTOCOL is set when :protocol pseudo header
field is seen. */
#define NGHTTP3_HTTP_FLAG__PROTOCOL 0x4000u
/* NGHTTP3_HTTP_FLAG_PRIORITY is set when priority header field is
processed. */
#define NGHTTP3_HTTP_FLAG_PRIORITY 0x8000u
/* NGHTTP3_HTTP_FLAG_BAD_PRIORITY is set when an error is encountered
while parsing priority header field. */
#define NGHTTP3_HTTP_FLAG_BAD_PRIORITY 0x010000u
/*
* This function is called when HTTP header field |nv| received for
* |http|. This function will validate |nv| against the current state
* of stream. Pass nonzero if this is request headers. Pass nonzero
* to |trailers| if |nv| is included in trailers. |connect_protocol|
* is nonzero if Extended CONNECT Method is enabled.
*
* This function returns 0 if it succeeds, or one of the following
* negative error codes:
*
* NGHTTP3_ERR_MALFORMED_HTTP_HEADER
* Invalid HTTP header field was received.
* NGHTTP3_ERR_REMOVE_HTTP_HEADER
* Invalid HTTP header field was received but it can be treated as
* if it was not received because of compatibility reasons.
*/
int nghttp3_http_on_header(nghttp3_http_state *http, nghttp3_qpack_nv *nv,
int request, int trailers, int connect_protocol);
/*
* This function is called when request header is received. This
* function performs validation and returns 0 if it succeeds, or one
* of the following negative error codes:
*
* NGHTTP3_ERR_MALFORMED_HTTP_HEADER
* Required HTTP header field was not received; or an invalid
* header field was received.
*/
int nghttp3_http_on_request_headers(nghttp3_http_state *http);
/*
* This function is called when response header is received. This
* function performs validation and returns 0 if it succeeds, or one
* of the following negative error codes:
*
* NGHTTP3_ERR_MALFORMED_HTTP_HEADER
* Required HTTP header field was not received; or an invalid
* header field was received.
*/
int nghttp3_http_on_response_headers(nghttp3_http_state *http);
/*
* This function is called when read side stream is closed. This
* function performs validation and returns 0 if it succeeds, or one
* of the following negative error codes:
*
* NGHTTP3_ERR_MALFORMED_HTTP_MESSAGING
* HTTP messaging is violated.
*/
int nghttp3_http_on_remote_end_stream(nghttp3_stream *stream);
/*
* This function is called when chunk of data is received. This
* function performs validation and returns 0 if it succeeds, or one
* of the following negative error codes:
*
* NGHTTP3_ERR_MALFORMED_HTTP_MESSAGING
* HTTP messaging is violated.
*/
int nghttp3_http_on_data_chunk(nghttp3_stream *stream, size_t n);
/*
* This function inspects header fields in |nva| of length |nvlen| and
* records its method in stream->http_flags.
*/
void nghttp3_http_record_request_method(nghttp3_stream *stream,
const nghttp3_nv *nva, size_t nvlen);
/*
* RFC 8941 Structured Field Values.
*/
typedef enum nghttp3_sf_value_type {
NGHTTP3_SF_VALUE_TYPE_BOOLEAN,
NGHTTP3_SF_VALUE_TYPE_INTEGER,
NGHTTP3_SF_VALUE_TYPE_DECIMAL,
NGHTTP3_SF_VALUE_TYPE_STRING,
NGHTTP3_SF_VALUE_TYPE_TOKEN,
NGHTTP3_SF_VALUE_TYPE_BYTESEQ,
NGHTTP3_SF_VALUE_TYPE_INNER_LIST,
} nghttp3_sf_value_type;
/*
* nghttp3_sf_value stores Structured Field Values item. For Inner
* List, only type is set to NGHTTP3_SF_VALUE_TYPE_INNER_LIST.
*/
typedef struct nghttp3_sf_value {
uint8_t type;
union {
int b;
int64_t i;
double d;
struct {
const uint8_t *base;
size_t len;
} s;
};
} nghttp3_sf_value;
/*
* nghttp3_sf_parse_item parses the input sequence [|begin|, |end|)
* and stores the parsed an Item in |dest|. It returns the number of
* bytes consumed if it succeeds, or -1. This function is declared
* here for unit tests.
*/
nghttp3_ssize nghttp3_sf_parse_item(nghttp3_sf_value *dest,
const uint8_t *begin, const uint8_t *end);
/*
* nghttp3_sf_parse_inner_list parses the input sequence [|begin|, |end|)
* and stores the parsed an Inner List in |dest|. It returns the number of
* bytes consumed if it succeeds, or -1. This function is declared
* here for unit tests.
*/
nghttp3_ssize nghttp3_sf_parse_inner_list(nghttp3_sf_value *dest,
const uint8_t *begin,
const uint8_t *end);
#endif /* NGHTTP3_HTTP_H */
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