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lib: connect/h2/h3 refactor

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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
This commit is contained in:
Stefan Eissing 2022-12-30 09:14:55 +01:00 • committed by Daniel Stenberg
parent 1c18f8da51
commit 71b7e01610
No known key found for this signature in database
GPG key ID: 5CC908FDB71E12C2
48 changed files with 6908 additions and 4675 deletions
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19
lib/multi.c
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@ -655,6 +655,9 @@ static CURLcode multi_done(struct Curl_easy *data,
result = CURLE_ABORTED_BY_CALLBACK;
}
/* Inform connection filters that this transfer is done */
Curl_conn_ev_data_done(data, premature);
process_pending_handles(data->multi); /* connection / multiplex */
CONNCACHE_LOCK(data);
@ -709,12 +712,12 @@ static CURLcode multi_done(struct Curl_easy *data,
conn->proxy_negotiate_state == GSS_AUTHRECV)
#endif
) || conn->bits.close
|| (premature && !(conn->handler->flags & PROTOPT_STREAM))) {
|| (premature && !Curl_conn_is_multiplex(conn, FIRSTSOCKET))) {
DEBUGF(infof(data, "multi_done, not re-using connection=%ld, forbid=%d"
", close=%d, premature=%d, stream=%d",
", close=%d, premature=%d, conn_multiplex=%d",
conn->connection_id,
data->set.reuse_forbid, conn->bits.close, premature,
(conn->handler->flags & PROTOPT_STREAM)));
Curl_conn_is_multiplex(conn, FIRSTSOCKET)));
connclose(conn, "disconnecting");
Curl_conncache_remove_conn(data, conn, FALSE);
CONNCACHE_UNLOCK(data);
@ -954,7 +957,7 @@ void Curl_detach_connection(struct Curl_easy *data)
{
struct connectdata *conn = data->conn;
if(conn) {
Curl_conn_detach_data(conn, data);
Curl_conn_ev_data_detach(conn, data);
Curl_llist_remove(&conn->easyq, &data->conn_queue, NULL);
}
data->conn = NULL;
@ -973,9 +976,9 @@ void Curl_attach_connection(struct Curl_easy *data,
data->conn = conn;
Curl_llist_insert_next(&conn->easyq, conn->easyq.tail, data,
&data->conn_queue);
Curl_conn_attach_data(conn, data);
if(conn->handler->attach)
conn->handler->attach(data, conn);
Curl_conn_ev_data_attach(conn, data);
}
static int domore_getsock(struct Curl_easy *data,
@ -1002,11 +1005,7 @@ static int protocol_getsock(struct Curl_easy *data,
{
if(conn->handler->proto_getsock)
return conn->handler->proto_getsock(data, conn, socks);
/* Backup getsock logic. Since there is a live socket in use, we must wait
for it or it will be removed from watching when the multi_socket API is
used. */
socks[0] = conn->sock[FIRSTSOCKET];
return GETSOCK_READSOCK(0) | GETSOCK_WRITESOCK(0);
return Curl_conn_get_select_socks(data, FIRSTSOCKET, socks);
}
/* returns bitmapped flags for this handle and its sockets. The 'socks[]'