curl/lib/http2.h
Stefan Eissing 671158242d
connections: introduce http/3 happy eyeballs
New cfilter HTTP-CONNECT for h3/h2/http1.1 eyeballing.
- filter is installed when `--http3` in the tool is used (or
  the equivalent CURLOPT_ done in the library)
- starts a QUIC/HTTP/3 connect right away. Should that not
  succeed after 100ms (subject to change), a parallel attempt
  is started for HTTP/2 and HTTP/1.1 via TCP
- both attempts are subject to IPv6/IPv4 eyeballing, same
  as happens for other connections
- tie timeout to the ip-version HAPPY_EYEBALLS_TIMEOUT
- use a `soft` timeout at half the value. When the soft timeout
  expires, the HTTPS-CONNECT filter checks if the QUIC filter
  has received any data from the server. If not, it will start
  the HTTP/2 attempt.

HTTP/3(ngtcp2) improvements.
- setting call_data in all cfilter calls similar to http/2 and vtls filters
  for use in callback where no stream data is available.
- returning CURLE_PARTIAL_FILE for prematurely terminated transfers
- enabling pytest test_05 for h3
- shifting functionality to "connect" UDP sockets from ngtcp2
  implementation into the udp socket cfilter. Because unconnected
  UDP sockets are weird. For example they error when adding to a
  pollset.

HTTP/3(quiche) improvements.
- fixed upload bug in quiche implementation, now passes 251 and pytest
- error codes on stream RESET
- improved debug logs
- handling of DRAIN during connect
- limiting pending event queue

HTTP/2 cfilter improvements.
- use LOG_CF macros for dynamic logging in debug build
- fix CURLcode on RST streams to be CURLE_PARTIAL_FILE
- enable pytest test_05 for h2
- fix upload pytests and improve parallel transfer performance.

GOAWAY handling for ngtcp2/quiche
- during connect, when the remote server refuses to accept new connections
  and closes immediately (so the local conn goes into DRAIN phase), the
  connection is torn down and a another attempt is made after a short grace
  period.
  This is the behaviour observed with nghttpx when we tell it to  shut
  down gracefully. Tested in pytest test_03_02.

TLS improvements
- ALPN selection for SSL/SSL-PROXY filters in one vtls set of functions, replaces
  copy of logic in all tls backends.
- standardized the infof logging of offered ALPNs
- ALPN negotiated: have common function for all backends that sets alpn proprty
  and connection related things based on the negotiated protocol (or lack thereof).

- new tests/tests-httpd/scorecard.py for testing h3/h2 protocol implementation.
  Invoke:
    python3 tests/tests-httpd/scorecard.py --help
  for usage.

Improvements on gathering connect statistics and socket access.
- new CF_CTRL_CONN_REPORT_STATS cfilter control for having cfilters
  report connection statistics. This is triggered when the connection
  has completely connected.
- new void Curl_pgrsTimeWas(..) method to report a timer update with
  a timestamp of when it happend. This allows for updating timers
  "later", e.g. a connect statistic after full connectivity has been
  reached.
- in case of HTTP eyeballing, the previous changes will update
  statistics only from the filter chain that "won" the eyeballing.
- new cfilter query CF_QUERY_SOCKET for retrieving the socket used
  by a filter chain.
  Added methods Curl_conn_cf_get_socket() and Curl_conn_get_socket()
  for convenient use of this query.
- Change VTLS backend to query their sub-filters for the socket when
  checks during the handshake are made.

HTTP/3 documentation on how https eyeballing works.

TLS improvements
- ALPN selection for SSL/SSL-PROXY filters in one vtls set of functions, replaces
  copy of logic in all tls backends.
- standardized the infof logging of offered ALPNs
- ALPN negotiated: have common function for all backends that sets alpn proprty
  and connection related things based on the negotiated protocol (or lack thereof).

Scorecard with Caddy.
- configure can be run with `--with-test-caddy=path` to specify which caddy to use for testing
- tests/tests-httpd/scorecard.py now measures download speeds with caddy

pytest improvements
- adding Makfile to clean gen dir
- adding nghttpx rundir creation on start
- checking httpd version 2.4.55 for test_05 cases where it is needed. Skipping with message if too old.
- catch exception when checking for caddy existance on system.

Closes #10349
2023-02-02 09:57:34 +01:00

82 lines
2.8 KiB
C

#ifndef HEADER_CURL_HTTP2_H
#define HEADER_CURL_HTTP2_H
/***************************************************************************
* _ _ ____ _
* Project ___| | | | _ \| |
* / __| | | | |_) | |
* | (__| |_| | _ <| |___
* \___|\___/|_| \_\_____|
*
* Copyright (C) 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"
#ifdef USE_NGHTTP2
#include "http.h"
/* value for MAX_CONCURRENT_STREAMS we use until we get an updated setting
from the peer */
#define DEFAULT_MAX_CONCURRENT_STREAMS 100
/*
* Store nghttp2 version info in this buffer.
*/
void Curl_http2_ver(char *p, size_t len);
const char *Curl_http2_strerror(uint32_t err);
CURLcode Curl_http2_request_upgrade(struct dynbuf *req,
struct Curl_easy *data);
/* returns true if the HTTP/2 stream error was HTTP_1_1_REQUIRED */
bool Curl_h2_http_1_1_error(struct Curl_easy *data);
bool Curl_conn_is_http2(const struct Curl_easy *data,
const struct connectdata *conn,
int sockindex);
bool Curl_cf_is_http2(struct Curl_cfilter *cf, const struct Curl_easy *data);
bool Curl_http2_may_switch(struct Curl_easy *data,
struct connectdata *conn,
int sockindex);
CURLcode Curl_http2_switch(struct Curl_easy *data,
struct connectdata *conn, int sockindex);
CURLcode Curl_http2_switch_at(struct Curl_cfilter *cf, struct Curl_easy *data);
CURLcode Curl_http2_upgrade(struct Curl_easy *data,
struct connectdata *conn, int sockindex,
const char *ptr, size_t nread);
extern struct Curl_cftype Curl_cft_nghttp2;
#else /* USE_NGHTTP2 */
#define Curl_cf_is_http2(a,b) FALSE
#define Curl_conn_is_http2(a,b,c) FALSE
#define Curl_http2_may_switch(a,b,c) FALSE
#define Curl_http2_request_upgrade(x,y) CURLE_UNSUPPORTED_PROTOCOL
#define Curl_http2_switch(a,b,c) CURLE_UNSUPPORTED_PROTOCOL
#define Curl_http2_upgrade(a,b,c,d,e) CURLE_UNSUPPORTED_PROTOCOL
#define Curl_h2_http_1_1_error(x) 0
#endif
#endif /* HEADER_CURL_HTTP2_H */