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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
148 lines
5.1 KiB
C
148 lines
5.1 KiB
C
#ifndef HEADER_CURL_HOSTIP_H
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#define HEADER_CURL_HOSTIP_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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#include "hash.h"
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#include "curlx/timeval.h" /* for curltime, timediff_t */
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/* Allocate enough memory to hold the full name information structs and
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* everything. OSF1 is known to require at least 8872 bytes. The buffer
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* required for storing all possible aliases and IP numbers is according to
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* Stevens' Unix Network Programming 2nd edition, p. 304: 8192 bytes!
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*/
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#define CURL_HOSTENT_SIZE 9000
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#define CURL_TIMEOUT_RESOLVE 300 /* when using asynch methods, we allow this
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many seconds for a name resolve */
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struct addrinfo;
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struct hostent;
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struct Curl_easy;
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struct connectdata;
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struct easy_pollset;
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struct Curl_https_rrinfo;
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struct Curl_multi;
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struct Curl_dns_entry;
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enum alpnid {
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ALPN_none = 0,
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ALPN_h1 = CURLALTSVC_H1,
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ALPN_h2 = CURLALTSVC_H2,
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ALPN_h3 = CURLALTSVC_H3
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};
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bool Curl_host_is_ipnum(const char *hostname);
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#ifdef USE_IPV6
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/* probe if it seems to work */
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CURLcode Curl_probeipv6(struct Curl_multi *multi);
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/*
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* Curl_ipv6works() returns TRUE if IPv6 seems to work.
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*/
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bool Curl_ipv6works(struct Curl_easy *data);
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#else
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#define Curl_probeipv6(x) CURLE_OK
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#define Curl_ipv6works(x) FALSE
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#endif
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/* IPv4 thread-safe resolve function used for synch and asynch builds */
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struct Curl_addrinfo *Curl_ipv4_resolve_r(const char *hostname, uint16_t port);
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/*
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* Curl_printable_address() returns a printable version of the 1st address
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* given in the 'ip' argument. The result will be stored in the buf that is
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* bufsize bytes big.
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*/
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void Curl_printable_address(const struct Curl_addrinfo *ip,
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char *buf, size_t bufsize);
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/*
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* Curl_resolv() returns an entry with the info for the specified host
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* and port.
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*
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* The returned data *MUST* be "released" with Curl_dns_entry_unlink() after
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* use, or we will leak memory!
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*/
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CURLcode Curl_resolv(struct Curl_easy *data,
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const char *hostname,
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uint16_t port,
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uint8_t ip_version,
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uint8_t transport,
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timediff_t timeout_ms,
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struct Curl_dns_entry **pdns);
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CURLcode Curl_resolv_blocking(struct Curl_easy *data,
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const char *hostname,
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uint16_t port,
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uint8_t ip_version,
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uint8_t transport,
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struct Curl_dns_entry **pdns);
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CURLcode Curl_resolv_timeout(struct Curl_easy *data,
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const char *hostname, int port,
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int ip_version,
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struct Curl_dns_entry **entry,
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timediff_t timeoutms);
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#ifdef USE_CURL_ASYNC
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CURLcode Curl_resolv_take_result(struct Curl_easy *data,
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struct Curl_dns_entry **pdns);
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const struct Curl_addrinfo *
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Curl_resolv_get_ai(struct Curl_easy *data, int ai_family,
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unsigned int index);
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#else
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#define Curl_resolv_take_result(x, y) CURLE_NOT_BUILT_IN
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#define Curl_resolv_get_ai(x,y,z) NULL
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#endif
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CURLcode Curl_resolv_pollset(struct Curl_easy *data,
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struct easy_pollset *ps);
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CURLcode Curl_resolver_error(struct Curl_easy *data, const char *detail);
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#ifdef CURLRES_SYNCH
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/*
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* Curl_sync_getaddrinfo() is the non-async low-level name resolve API.
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* There are several versions of this function - depending on IPV6
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* support and platform.
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*/
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struct Curl_addrinfo *Curl_sync_getaddrinfo(struct Curl_easy *data,
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const char *hostname,
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uint16_t port,
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uint8_t ip_version,
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uint8_t transport);
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#endif
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#ifdef USE_UNIX_SOCKETS
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CURLcode Curl_resolv_unix(struct Curl_easy *data,
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const char *unix_path,
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bool abstract_path,
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struct Curl_dns_entry **pdns);
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#endif
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#endif /* HEADER_CURL_HOSTIP_H */
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