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* proxy: http2 proxy tunnel implementationStefan Eissing2023-04-061-5/+16
| | | | | | | | | | | | | | | | | | | | | | | | | | | - currently only on debug build and when env variable CURL_PROXY_TUNNEL_H2 is present. - will ALPN negotiate with the proxy server and switch tunnel filter based on the protocol negotiated. - http/1.1 tunnel code moved into cf-h1-proxy.[ch] - http/2 tunnel code implemented in cf-h2-proxy.[ch] - tunnel start and ALPN set remains in http_proxy.c - moving all haproxy related code into cf-haproxy.[ch] VTLS changes - SSL filters rely solely on the "alpn" specification they are created with and no longer check conn->bits.tls_enable_alpn. - checks on which ALPN specification to use (or none at all) are done in vtls.c when creating the filter. Testing - added a nghttpx forward proxy to the pytest setup that speaks HTTP/2 and forwards all requests to the Apache httpd forward proxy server. - extending test coverage in test_10 cases - adding proxy tests for direct/tunnel h1/h2 use of basic auth. - adding test for http/1.1 and h2 proxy tunneling to pytest Closes #10780
* url: fix logic in connection reuse to deny reuse on "unclean" connectionsStefan Eissing2023-03-071-3/+6
| | | | | | | | | | | | | | - add parameter to `conn_is_alive()` cfilter method that returns if there is input data waiting on the connection - refrain from re-using connnection from the cache that have input pending - adapt http/2 and http/3 alive checks to digest pending input to check the connection state - remove check_cxn method from openssl as that was just doing what the socket filter now does. - add tests for connection reuse with special server configs Closes #10690
* connect: fix time_connect and time_appconnect timer statisticsStefan Eissing2023-03-061-5/+5
| | | | | | | | | | | | | | - time_connect was not updated when the overall connection failed, e.g. when SSL verification was unsuccessful, refs #10670 - rework gather those values to interrogate involved filters, also from all eyeballing attempts, to report the maximum of those values. - added 3 test cases in test_06 to check reported values on successful, partially failed and totally failed connections. Reported-by: Master Inspire Fixes #10670 Closes #10671
* misc: fix spellingJohn Bampton2023-02-081-1/+1
| | | | Closes #10437
* connections: introduce http/3 happy eyeballsStefan Eissing2023-02-021-2/+31
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | 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
* cf-socket: improvements in socket I/O handlingStefan Eissing2023-01-311-0/+2
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | - Curl_write_plain/Curl_read_plain have been eliminated. Last code use now uses Curl_conn_send/recv so that requests use conn->send/revc callbacks which defaults to cfilters use. - Curl_recv_plain/Curl_send_plain have been internalized in cf-socket.c. - USE_RECV_BEFORE_SEND_WORKAROUND (active on Windows) has been moved into cf-socket.c. The pre_recv buffer is held at the socket filter context. `postponed_data` structures have been removed from `connectdata`. - the hanger in HTTP/2 request handling was a result of read buffering on all sends and the multi handling is not prepared for this. The following happens: - multi preforms on a HTTP/2 easy handle - h2 reads and processes data - this leads to a send of h2 data - which receives and buffers before the send - h2 returns - multi selects on the socket, but no data arrives (its in the buffer already) the workaround now receives data in a loop as long as there is something in the buffer. The real fix would be for multi to change, so that `data_pending` is evaluated before deciding to wait on the socket. io_buffer, optional, in cf-socket.c, http/2 sets state.drain if lower filter have pending data. This io_buffer is only available/used when the -DUSE_RECV_BEFORE_SEND_WORKAROUND is active, e.g. on Windows configurations. It also maintains the original checks on protocol handler being HTTP and conn->send/recv not being replaced. The HTTP/2 (nghttp2) cfilter now sets data->state.drain when it finds out that the "lower" filter chain has still pending data at the end of its IO operation. This prevents the processing from becoming stalled. Closes #10280
* vtls: Manage current easy handle in nested cfilter callsStefan Eissing2023-01-261-0/+69
| | | | | | | | | | The previous implementation cleared `data` so the outer invocation lost its data, which could lead to a crash. Bug: https://github.com/curl/curl/issues/10336 Reported-by: Fujii Hironori Closes https://github.com/curl/curl/pull/10340
* curl_log: for failf/infof and debug logging implementationsStefan Eissing2023-01-121-1/+2
| | | | | | | | | - new functions and macros for cfilter debugging - set CURL_DEBUG with names of cfilters where debug logging should be enabled - use GNUC __attribute__ to enable printf format checks during compile Closes #10271
* copyright: update all copyright lines and remove year rangesDaniel Stenberg2023-01-031-1/+1
| | | | | | | | | | | | - they are mostly pointless in all major jurisdictions - many big corporations and projects already don't use them - saves us from pointless churn - git keeps history for us - the year range is kept in COPYING checksrc is updated to allow non-year using copyright statements Closes #10205
* lib: connect/h2/h3 refactorStefan Eissing2022-12-301-52/+172
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | 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
* tls: backends use connection filters for IO, enabling HTTPS-proxyStefan Eissing2022-11-281-51/+64
| | | | | | | | | | | | | | | | | | - OpenSSL (and compatible) - BearSSL - gnutls - mbedtls - rustls - schannel - secure-transport - wolfSSL (v5.0.0 and newer) This leaves only the following without HTTPS-proxy support: - gskit - nss - wolfSSL (versions earlier than v5.0.0) Closes #9962
* cfilter: re-add `conn` as parameter to cfilter setup methodsStefan Eissing2022-11-261-0/+2
| | | | | | | | | | | - `Curl_ssl_get_config()` now returns the first config if no SSL proxy filter is active - socket filter starts connection only on first invocation of its connect method Fixes #9982 Closes #9983
* vtls: localization of state data in filtersStefan Eissing2022-11-221-48/+132
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | - almost all backend calls pass the Curl_cfilter intance instead of connectdata+sockindex - ssl_connect_data is remove from struct connectdata and made internal to vtls - ssl_connect_data is allocated in the added filter, kept at cf->ctx - added function to let a ssl filter access its ssl_primary_config and ssl_config_data this selects the propert subfields in conn and data, for filters added as plain or proxy - adjusted all backends to use the changed api - adjusted all backends to access config data via the exposed functions, no longer using conn or data directly cfilter renames for clear purpose: - methods `Curl_conn_*(data, conn, sockindex)` work on the complete filter chain at `sockindex` and connection `conn`. - methods `Curl_cf_*(cf, ...)` work on a specific Curl_cfilter instance. - methods `Curl_conn_cf()` work on/with filter instances at a connection. - rebased and resolved some naming conflicts - hostname validation (und session lookup) on SECONDARY use the same name as on FIRST (again). new debug macros and removing connectdata from function signatures where not needed. adapting schannel for new Curl_read_plain paramter. Closes #9919
* cfiler: filter types have flags indicating what they doStefan Eissing2022-11-221-0/+10
| | | | | | | | | | | | - Adding Curl_conn_is_ip_connected() to check if network connectivity has been reached - having ftp wait for network connectivity before proceeding with transfers. Fixes test failures 1631 and 1632 with hyper. Closes #9952
* lib: connection filters (cfilter) addition to curl:Stefan Eissing2022-11-111-0/+206
- general construct/destroy in connectdata - default implementations of callback functions - connect: cfilters for connect and accept - socks: cfilter for socks proxying - http_proxy: cfilter for http proxy tunneling - vtls: cfilters for primary and proxy ssl - change in general handling of data/conn - Curl_cfilter_setup() sets up filter chain based on data settings, if none are installed by the protocol handler setup - Curl_cfilter_connect() boot straps filters into `connected` status, used by handlers and multi to reach further stages - Curl_cfilter_is_connected() to check if a conn is connected, e.g. all filters have done their work - Curl_cfilter_get_select_socks() gets the sockets and READ/WRITE indicators for multi select to work - Curl_cfilter_data_pending() asks filters if the have incoming data pending for recv - Curl_cfilter_recv()/Curl_cfilter_send are the general callbacks installed in conn->recv/conn->send for io handling - Curl_cfilter_attach_data()/Curl_cfilter_detach_data() inform filters and addition/removal of a `data` from their connection - adding vtl functions to prevent use of Curl_ssl globals directly in other parts of the code. Reviewed-by: Daniel Stenberg Closes #9855