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71b7e01610
curl/lib/http.h
Stefan Eissing 71b7e01610
lib: connect/h2/h3 refactor 
Refactoring of connection setup and happy eyeballing. Move
nghttp2. ngtcp2, quiche and msh3 into connection filters.

 - eyeballing cfilter that uses sub-filters for performing parallel connects
 - socket cfilter for all transport types, including QUIC
 - QUIC implementations in cfilter, can now participate in eyeballing
 - connection setup is more dynamic in order to adapt to what filter did
   really connect.  Relevant to see if a SSL filter needs to be added or
   if SSL has already been provided
 - HTTP/3 test cases similar to HTTP/2
 - multiuse of parallel transfers for HTTP/3, tested for ngtcp2 and quiche

 - Fix for data attach/detach in VTLS filters that could lead to crashes
   during parallel transfers.
 - Eliminating setup() methods in cfilters, no longer needed.
 - Improving Curl_conn_is_alive() to replace Curl_connalive() and
   integrated ssl alive checks into cfilter.
 - Adding CF_CNTRL_CONN_INFO_UPDATE to tell filters to update
   connection into and persist it at the easy handle.

 - Several more cfilter related cleanups and moves:
   - stream_weigth and dependency info is now wrapped in struct
     Curl_data_priority
   - Curl_data_priority members depend is available in HTTP2|HTTP3
   - Curl_data_priority members depend on NGHTTP2 support
   - handling init/reset/cleanup of priority part of url.c
   - data->state.priority same struct, but shallow copy for compares only

 - PROTOPT_STREAM has been removed
   - Curl_conn_is_mulitplex() now available to check on capability

 - Adding query method to connection filters.
   - ngtcp2+quiche: implementing query for max concurrent transfers.

 - Adding is_alive and keep_alive cfilter methods. Adding DATA_SETUP event.
   - setting keepalive timestamp on connect
   - DATA_SETUP is called after the connection has been completely
     setup (but may not connected yet) to allow filters to initialize
     data members they use.

 - there is no socket to be had with msh3, it is unclear how select
   shall work

 - manual test via "curl --http3 https://curl.se" fail with "empty
   reply from server".

 - Various socket/conn related cleanups:
   - Curl_socket is now Curl_socket_open and in cf-socket.c
   - Curl_closesocket is now Curl_socket_close and in cf-socket.c
   - Curl_ssl_use has been replaced with Cur_conn_is_ssl
   - Curl_conn_tcp_accepted_set has been split into
     Curl_conn_tcp_listen_set and Curl_conn_tcp_accepted_set
     with a clearer purpose

Closes #10141
2022-12-30 16:43:19 +01:00

322 lines
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#ifndef HEADER_CURL_HTTP_H
#define HEADER_CURL_HTTP_H
/***************************************************************************
* _ _ ____ _
* Project ___| | | | _ \| |
* / __| | | | |_) | |
* | (__| |_| | _ <| |___
* \___|\___/|_| \_\_____|
*
* Copyright (C) 1998 - 2022, Daniel Stenberg, <daniel@haxx.se>, et al.
*
* This software is licensed as described in the file COPYING, which
* you should have received as part of this distribution. The terms
* are also available at https://curl.se/docs/copyright.html.
*
* You may opt to use, copy, modify, merge, publish, distribute and/or sell
* copies of the Software, and permit persons to whom the Software is
* furnished to do so, under the terms of the COPYING file.
*
* This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
* KIND, either express or implied.
*
* SPDX-License-Identifier: curl
*
***************************************************************************/
#include "curl_setup.h"
#if defined(USE_MSH3) && !defined(_WIN32)
#include <pthread.h>
#endif
#include "ws.h"
typedef enum {
HTTPREQ_GET,
HTTPREQ_POST,
HTTPREQ_POST_FORM, /* we make a difference internally */
HTTPREQ_POST_MIME, /* we make a difference internally */
HTTPREQ_PUT,
HTTPREQ_HEAD
} Curl_HttpReq;
#ifndef CURL_DISABLE_HTTP
#if defined(_WIN32) && defined(ENABLE_QUIC)
#include <stdint.h>
#endif
extern const struct Curl_handler Curl_handler_http;
#ifdef USE_SSL
extern const struct Curl_handler Curl_handler_https;
#endif
#ifdef USE_WEBSOCKETS
extern const struct Curl_handler Curl_handler_ws;
#ifdef USE_SSL
extern const struct Curl_handler Curl_handler_wss;
#endif
#endif /* websockets */
/* Header specific functions */
bool Curl_compareheader(const char *headerline, /* line to check */
const char *header, /* header keyword _with_ colon */
const size_t hlen, /* len of the keyword in bytes */
const char *content, /* content string to find */
const size_t clen); /* len of the content in bytes */
char *Curl_copy_header_value(const char *header);
char *Curl_checkProxyheaders(struct Curl_easy *data,
const struct connectdata *conn,
const char *thisheader,
const size_t thislen);
CURLcode Curl_buffer_send(struct dynbuf *in,
struct Curl_easy *data,
curl_off_t *bytes_written,
curl_off_t included_body_bytes,
int socketindex);
CURLcode Curl_add_timecondition(struct Curl_easy *data,
#ifndef USE_HYPER
struct dynbuf *req
#else
void *headers
#endif
);
CURLcode Curl_add_custom_headers(struct Curl_easy *data,
bool is_connect,
#ifndef USE_HYPER
struct dynbuf *req
#else
void *headers
#endif
);
CURLcode Curl_http_compile_trailers(struct curl_slist *trailers,
struct dynbuf *buf,
struct Curl_easy *handle);
void Curl_http_method(struct Curl_easy *data, struct connectdata *conn,
const char **method, Curl_HttpReq *);
CURLcode Curl_http_useragent(struct Curl_easy *data);
CURLcode Curl_http_host(struct Curl_easy *data, struct connectdata *conn);
CURLcode Curl_http_target(struct Curl_easy *data, struct connectdata *conn,
struct dynbuf *req);
CURLcode Curl_http_statusline(struct Curl_easy *data,
struct connectdata *conn);
CURLcode Curl_http_header(struct Curl_easy *data, struct connectdata *conn,
char *headp);
CURLcode Curl_transferencode(struct Curl_easy *data);
CURLcode Curl_http_body(struct Curl_easy *data, struct connectdata *conn,
Curl_HttpReq httpreq,
const char **teep);
CURLcode Curl_http_bodysend(struct Curl_easy *data, struct connectdata *conn,
struct dynbuf *r, Curl_HttpReq httpreq);
bool Curl_use_http_1_1plus(const struct Curl_easy *data,
const struct connectdata *conn);
#ifndef CURL_DISABLE_COOKIES
CURLcode Curl_http_cookies(struct Curl_easy *data,
struct connectdata *conn,
struct dynbuf *r);
#else
#define Curl_http_cookies(a,b,c) CURLE_OK
#endif
CURLcode Curl_http_resume(struct Curl_easy *data,
struct connectdata *conn,
Curl_HttpReq httpreq);
CURLcode Curl_http_range(struct Curl_easy *data,
Curl_HttpReq httpreq);
CURLcode Curl_http_firstwrite(struct Curl_easy *data,
struct connectdata *conn,
bool *done);
/* protocol-specific functions set up to be called by the main engine */
CURLcode Curl_http(struct Curl_easy *data, bool *done);
CURLcode Curl_http_done(struct Curl_easy *data, CURLcode, bool premature);
CURLcode Curl_http_connect(struct Curl_easy *data, bool *done);
/* These functions are in http.c */
CURLcode Curl_http_input_auth(struct Curl_easy *data, bool proxy,
const char *auth);
CURLcode Curl_http_auth_act(struct Curl_easy *data);
/* If only the PICKNONE bit is set, there has been a round-trip and we
selected to use no auth at all. Ie, we actively select no auth, as opposed
to not having one selected. The other CURLAUTH_* defines are present in the
public curl/curl.h header. */
#define CURLAUTH_PICKNONE (1<<30) /* don't use auth */
/* MAX_INITIAL_POST_SIZE indicates the number of bytes that will make the POST
data get included in the initial data chunk sent to the server. If the
data is larger than this, it will automatically get split up in multiple
system calls.
This value used to be fairly big (100K), but we must take into account that
if the server rejects the POST due for authentication reasons, this data
will always be unconditionally sent and thus it may not be larger than can
always be afforded to send twice.
It must not be greater than 64K to work on VMS.
*/
#ifndef MAX_INITIAL_POST_SIZE
#define MAX_INITIAL_POST_SIZE (64*1024)
#endif
/* EXPECT_100_THRESHOLD is the request body size limit for when libcurl will
* automatically add an "Expect: 100-continue" header in HTTP requests. When
* the size is unknown, it will always add it.
*
*/
#ifndef EXPECT_100_THRESHOLD
#define EXPECT_100_THRESHOLD (1024*1024)
#endif
#endif /* CURL_DISABLE_HTTP */
#ifdef USE_NGHTTP3
struct h3out; /* see ngtcp2 */
#endif
/****************************************************************************
* HTTP unique setup
***************************************************************************/
struct HTTP {
curl_mimepart *sendit;
curl_off_t postsize; /* off_t to handle large file sizes */
const char *postdata;
const char *p_pragma; /* Pragma: string */
/* For FORM posting */
curl_mimepart form;
struct back {
curl_read_callback fread_func; /* backup storage for fread pointer */
void *fread_in; /* backup storage for fread_in pointer */
const char *postdata;
curl_off_t postsize;
} backup;
enum {
HTTPSEND_NADA, /* init */
HTTPSEND_REQUEST, /* sending a request */
HTTPSEND_BODY /* sending body */
} sending;
#ifdef USE_WEBSOCKETS
struct websocket ws;
#endif
#ifndef CURL_DISABLE_HTTP
struct dynbuf send_buffer; /* used if the request couldn't be sent in one
chunk, points to an allocated send_buffer
struct */
#endif
#ifdef USE_NGHTTP2
/*********** for HTTP/2 we store stream-local data here *************/
int32_t stream_id; /* stream we are interested in */
/* We store non-final and final response headers here, per-stream */
struct dynbuf header_recvbuf;
size_t nread_header_recvbuf; /* number of bytes in header_recvbuf fed into
upper layer */
struct dynbuf trailer_recvbuf;
const uint8_t *pausedata; /* pointer to data received in on_data_chunk */
size_t pauselen; /* the number of bytes left in data */
bool close_handled; /* TRUE if stream closure is handled by libcurl */
char **push_headers; /* allocated array */
size_t push_headers_used; /* number of entries filled in */
size_t push_headers_alloc; /* number of entries allocated */
uint32_t error; /* HTTP/2 stream error code */
#endif
#if defined(USE_NGHTTP2) || defined(USE_NGHTTP3)
bool bodystarted;
int status_code; /* HTTP status code */
bool closed; /* TRUE on HTTP2 stream close */
char *mem; /* points to a buffer in memory to store received data */
size_t len; /* size of the buffer 'mem' points to */
size_t memlen; /* size of data copied to mem */
#endif
#if defined(USE_NGHTTP2) || defined(ENABLE_QUIC)
/* fields used by both HTTP/2 and HTTP/3 */
const uint8_t *upload_mem; /* points to a buffer to read from */
size_t upload_len; /* size of the buffer 'upload_mem' points to */
curl_off_t upload_left; /* number of bytes left to upload */
#endif
#ifdef ENABLE_QUIC
#ifndef USE_MSH3
/*********** for HTTP/3 we store stream-local data here *************/
int64_t stream3_id; /* stream we are interested in */
uint64_t error3; /* HTTP/3 stream error code */
bool firstheader; /* FALSE until headers arrive */
bool firstbody; /* FALSE until body arrives */
bool h3req; /* FALSE until request is issued */
#endif /* !USE_MSH3 */
bool upload_done;
#endif /* ENABLE_QUIC */
#ifdef USE_NGHTTP3
size_t unacked_window;
struct h3out *h3out; /* per-stream buffers for upload */
struct dynbuf overflow; /* excess data received during a single Curl_read */
#endif /* USE_NGHTTP3 */
#ifdef USE_MSH3
struct MSH3_REQUEST *req;
#ifdef _WIN32
CRITICAL_SECTION recv_lock;
#else /* !_WIN32 */
pthread_mutex_t recv_lock;
#endif /* _WIN32 */
/* Receive Buffer (Headers and Data) */
uint8_t* recv_buf;
size_t recv_buf_alloc;
/* Receive Headers */
size_t recv_header_len;
bool recv_header_complete;
/* Receive Data */
size_t recv_data_len;
bool recv_data_complete;
/* General Receive Error */
CURLcode recv_error;
#endif /* USE_MSH3 */
};
CURLcode Curl_http_size(struct Curl_easy *data);
CURLcode Curl_http_readwrite_headers(struct Curl_easy *data,
struct connectdata *conn,
ssize_t *nread,
bool *stop_reading);
/**
* Curl_http_output_auth() setups the authentication headers for the
* host/proxy and the correct authentication
* method. data->state.authdone is set to TRUE when authentication is
* done.
*
* @param data all information about the current transfer
* @param conn all information about the current connection
* @param request pointer to the request keyword
* @param httpreq is the request type
* @param path pointer to the requested path
* @param proxytunnel boolean if this is the request setting up a "proxy
* tunnel"
*
* @returns CURLcode
*/
CURLcode
Curl_http_output_auth(struct Curl_easy *data,
struct connectdata *conn,
const char *request,
Curl_HttpReq httpreq,
const char *path,
bool proxytunnel); /* TRUE if this is the request setting
up the proxy tunnel */
#endif /* HEADER_CURL_HTTP_H */
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