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335dc0e3c5
New connection filter `cf-dns` that manages DNS queries. If hands out addresses and HTTPS-RR records to anyone interested. Used by HTTPS and IP happy eyeballing. Information may become available *before* the libcurl "dns entry" is complete, e.g. all queries have been answered. The cf-ip-happy filter uses this information to start connection attempts as soon as the first address is available. The multi MSTATE_RESOLVING was removed. A new connection always goes to MSTATE_CONNECTING. The connectdata bit `dns_resolved` indicates when DNS information is complete. This is used for error reporting and starting the progress meter. Removed dns entries `data->state.dns[i]`, as the `cf-dns` filter now keeps the reference now. Many minor tweaks for making this work and pass address information around safely. Closes #21027
58 lines
2.2 KiB
C
58 lines
2.2 KiB
C
#ifndef HEADER_CURL_IP_HAPPY_H
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#define HEADER_CURL_IP_HAPPY_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 connectdata;
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struct Curl_addrinfo;
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struct Curl_cfilter;
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struct Curl_easy;
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struct Curl_sockaddr_ex;
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/**
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* Create a cfilter for making an "ip" connection to the
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* given address, using parameters from `conn`. The "ip" connection
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* can be a TCP socket, a UDP socket or even a QUIC connection.
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*
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* It MUST use only the supplied `ai` for its connection attempt.
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*
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* Such a filter may be used in "happy eyeball" scenarios, and its
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* `connect` implementation needs to support non-blocking. Once connected,
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* it MAY be installed in the connection filter chain to serve transfers.
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*/
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typedef CURLcode cf_ip_connect_create(struct Curl_cfilter **pcf,
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struct Curl_easy *data,
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struct connectdata *conn,
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struct Curl_sockaddr_ex *addr,
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uint8_t transport);
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CURLcode cf_ip_happy_insert_after(struct Curl_cfilter *cf_at,
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struct Curl_easy *data,
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uint8_t transport);
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extern struct Curl_cftype Curl_cft_ip_happy;
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#endif /* HEADER_CURL_IP_HAPPY_H */
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