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2b3dfb4ad4
- allow to specify when they are wanted on starting a resolve - match dns cache entries accordingly. An entry which never tried to get HTTPS-RRs is no answer for a resolve that wants it. - fix late arrivals of resolve answers to match the "async" records that started them - if it still exists. - provide for multiple "async" resolves in a transfer at the same time. We may need to resolve an IP interface while the main connection resolve has not finished yet. - allow lookup of HTTPS-RR information as soon as it is available, even if A/AAAA queries are still ongoing. For this, the "async" infrastructure is changed: - Defined bits for DNS queries `CURL_DNSQ_A`, `CURL_DNSQ_AAAA` and `CURL_DNSQ_HTTPS`. These replace `ip_version` which says nothing about HTTPS. Use them in dns cache entries for matching. - enhance the `async->id` to be a unique `uint32_t` for resolves inside one multi. This is weak, as the id may wrap around. However it is combined with the `mid` of the easy handle, making collisions highly unlikely. `data->state.async` is only accessed in few places where the mid/async-id match is performed. - vtls: for ECH supporting TLS backends (openssl, rustls, wolfssl), retrieve the HTTPS-RR information from the dns connection filter. Delay the connect if the HTTPS-RR is needed, but has not been resolved yet. The implementation of all this is complete for the threaded resolver. c-ares resolver and DoH do not take advantage of all new async features yet. To be done in separate PRs. Details: c-ares: cleanup settings and initialisation. Any ares channel is only being created on starting a resolve and propagating operations in setopt.c to the channel are not helpful. Changed threaded+ares pollset handling so that they do not overwrite each others `ASYNC_NAME` timeouts. Add trace name 'threads' for tracing thread queue and pool used by threaded resolver. Closes #21175
76 lines
2.7 KiB
C
76 lines
2.7 KiB
C
#ifndef HEADER_CURL_CF_DNS_H
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#define HEADER_CURL_CF_DNS_H
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/***************************************************************************
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* _ _ ____ _
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* Project ___| | | | _ \| |
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* / __| | | | |_) | |
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* | (__| |_| | _ <| |___
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* \___|\___/|_| \_\_____|
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*
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* Copyright (C) Daniel Stenberg, <daniel@haxx.se>, et al.
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*
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* This software is licensed as described in the file COPYING, which
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* you should have received as part of this distribution. The terms
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* are also available at https://curl.se/docs/copyright.html.
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*
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* You may opt to use, copy, modify, merge, publish, distribute and/or sell
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* copies of the Software, and permit persons to whom the Software is
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* furnished to do so, under the terms of the COPYING file.
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*
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* This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
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* KIND, either express or implied.
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*
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* SPDX-License-Identifier: curl
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*
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***************************************************************************/
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#include "curl_setup.h"
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struct Curl_easy;
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struct connectdata;
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struct Curl_dns_entry;
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struct Curl_addrinfo;
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CURLcode Curl_cf_dns_add(struct Curl_easy *data,
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struct connectdata *conn,
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int sockindex,
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uint8_t dns_queries,
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uint8_t transport,
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struct Curl_dns_entry *dns);
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CURLcode Curl_cf_dns_insert_after(struct Curl_cfilter *cf_at,
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struct Curl_easy *data,
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uint8_t dns_queries,
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const char *hostname,
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uint16_t port,
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uint8_t transport);
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CURLcode Curl_conn_dns_result(struct connectdata *conn, int sockindex);
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CURLcode Curl_cf_dns_result(struct Curl_cfilter *cf);
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const struct Curl_addrinfo *
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Curl_conn_dns_get_ai(struct Curl_easy *data,
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int sockindex,
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int ai_family,
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unsigned int index);
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const struct Curl_addrinfo *
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Curl_cf_dns_get_ai(struct Curl_cfilter *cf,
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struct Curl_easy *data,
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int ai_family,
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unsigned int index);
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#ifdef USE_HTTPSRR
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const struct Curl_https_rrinfo *
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Curl_conn_dns_get_https(struct Curl_easy *data, int sockindex);
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bool Curl_conn_dns_resolved_https(struct Curl_easy *data, int sockindex);
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#else
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#define Curl_conn_dns_get_https(a,b) NULL
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#define Curl_conn_dns_resolved_https(a,b) TRUE
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#endif
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extern struct Curl_cftype Curl_cft_dns;
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#endif /* HEADER_CURL_CF_DNS_H */
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