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/*
* Copyright (C) CZ.NIC, z.s.p.o
*
* Initial Author: Jan Hák <jan.hak@nic.cz>
*
* SPDX-License-Identifier: GPL-3.0-or-later
*/
#pragma once
#include <uv.h>
#include <libknot/packet/pkt.h>
#if ENABLE_DOH2
#include <nghttp2/nghttp2.h>
#endif
#include "lib/generic/queue.h"
#include "lib/generic/trie.h"
/** Transport session (opaque). */
struct session;
typedef ssize_t(*http_send_callback)(const uint8_t *buffer,
const size_t buffer_len,
struct session *session);
struct http_stream {
int32_t id;
kr_http_header_array_t *headers;
};
typedef queue_t(struct http_stream) queue_http_stream;
typedef enum {
HTTP_METHOD_NONE = 0,
HTTP_METHOD_GET = 1,
HTTP_METHOD_POST = 2,
HTTP_METHOD_HEAD = 3, /**< Same as GET, except it does not return payload.
* Required to be implemented by RFC 7231. */
} http_method_t;
/** HTTP status codes returned by kresd.
* This is obviously non-exhaustive of all HTTP status codes, feel free to add
* more if needed. */
enum http_status {
HTTP_STATUS_OK = 200,
HTTP_STATUS_BAD_REQUEST = 400,
HTTP_STATUS_NOT_FOUND = 404,
HTTP_STATUS_PAYLOAD_TOO_LARGE = 413,
HTTP_STATUS_UNSUPPORTED_MEDIA_TYPE = 415,
HTTP_STATUS_REQUEST_HEADER_FIELDS_TOO_LARGE = 431,
HTTP_STATUS_NOT_IMPLEMENTED = 501,
};
struct http_ctx {
struct nghttp2_session *h2;
http_send_callback send_cb;
struct session *session;
queue_http_stream streams; /* Streams present in the wire buffer. */
trie_t *stream_write_data; /* Dictionary of stream data that needs to be freed after write. */
int32_t incomplete_stream;
int32_t last_stream; /* The last used stream - mostly the same as incomplete_stream, but can be used after
completion for sending HTTP status codes. */
ssize_t submitted;
http_method_t current_method;
char *uri_path;
kr_http_header_array_t *headers;
uint8_t *buf; /* Part of the wire_buf that belongs to current HTTP/2 stream. */
ssize_t buf_pos;
ssize_t buf_size;
enum http_status status;
bool streaming; /* True: not all data in the stream has been received yet. */
};
#if ENABLE_DOH2
struct http_ctx* http_new(struct session *session, http_send_callback send_cb);
int http_process_input_data(struct session *session, const uint8_t *buf, ssize_t nread,
ssize_t *out_submitted);
int http_send_status(struct session *session, enum http_status status);
int http_write(uv_write_t *req, uv_handle_t *handle, knot_pkt_t* pkt, int32_t stream_id,
uv_write_cb on_write);
void http_free(struct http_ctx *ctx);
void http_free_headers(kr_http_header_array_t *headers);
#endif
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