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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
192 lines
6.7 KiB
C
192 lines
6.7 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_MS (300 * 1000)
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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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/* DNS query types */
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#define CURL_DNSQ_A (1U << 0)
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#define CURL_DNSQ_AAAA (1U << 1)
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#define CURL_DNSQ_HTTPS (1U << 2)
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#define CURL_DNSQ_ALL (CURL_DNSQ_A|CURL_DNSQ_AAAA|CURL_DNSQ_HTTPS)
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#define CURL_DNSQ_IP(x) (uint8_t)((x)&(CURL_DNSQ_A|CURL_DNSQ_AAAA))
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#ifdef CURLVERBOSE
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const char *Curl_resolv_query_str(uint8_t dns_queries);
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#endif
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/* Return CURL_DNSQ_* bits for the transfer and ip_version. */
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uint8_t Curl_resolv_dns_queries(struct Curl_easy *data, uint8_t ip_version);
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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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/* Start DNS resolving for the given parameters. Returns
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* - CURLE_OK: `*pdns` is the resolved DNS entry (needs to be unlinked).
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* `*presolv_id` is 0.
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* - CURLE_AGAIN: resolve is asynchronous and not finished yet.
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* `presolv_id` is the identifier for querying results later.
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* - other: the operation failed, `*pdns` is NULL, `*presolv_id` is 0.
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*/
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CURLcode Curl_resolv(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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timediff_t timeout_ms,
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uint32_t *presolv_id,
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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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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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struct Curl_dns_entry **pdns);
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/* Announce start of a resolve operation to application callback,
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* passing the resolver implementation (maybe NULL). */
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CURLcode Curl_resolv_announce_start(struct Curl_easy *data,
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void *resolver);
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#ifdef USE_CURL_ASYNC
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CURLcode Curl_resolv_pollset(struct Curl_easy *data,
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struct easy_pollset *ps);
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/* Get the `async` struct for the given `resolv_id`, if it exists. */
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struct Curl_resolv_async *Curl_async_get(struct Curl_easy *data,
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uint32_t resolv_id);
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/* Shut down all resolves of the given easy handle. */
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void Curl_resolv_shutdown_all(struct Curl_easy *data);
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/* Destroy all resolve resources of the given easy handle. */
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void Curl_resolv_destroy_all(struct Curl_easy *data);
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CURLcode Curl_resolv_take_result(struct Curl_easy *data, uint32_t resolv_id,
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struct Curl_dns_entry **pdns);
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void Curl_resolv_destroy(struct Curl_easy *data, uint32_t resolv_id);
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const struct Curl_addrinfo *
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Curl_resolv_get_ai(struct Curl_easy *data, uint32_t resolv_id,
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int ai_family, unsigned int index);
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#ifdef USE_HTTPSRR
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const struct Curl_https_rrinfo *
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Curl_resolv_get_https(struct Curl_easy *data, uint32_t resolv_id);
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bool Curl_resolv_knows_https(struct Curl_easy *data, uint32_t resolv_id);
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#endif /* USE_HTTPSRR */
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#else /* USE_CURL_ASYNC */
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#define Curl_resolv_shutdown_all(x) Curl_nop_stmt
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#define Curl_resolv_destroy_all(x) Curl_nop_stmt
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#define Curl_resolv_take_result(x, y, z) CURLE_NOT_BUILT_IN
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#define Curl_resolv_get_ai(x,y,z, a) NULL
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#define Curl_resolv_get_https(x,y) NULL
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#define Curl_resolv_knows_https(x,y) TRUE
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#define Curl_resolv_pollset(x,y) CURLE_OK
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#define Curl_resolv_destroy(x,y) Curl_nop_stmt
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#endif /* USE_CURL_ASYNC, else */
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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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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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#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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