2010-01-26 02:50:13 +03:00
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#ifndef HEADER_CURL_HOSTIP_H
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#define HEADER_CURL_HOSTIP_H
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2002-09-03 15:52:59 +04:00
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/***************************************************************************
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2004-06-10 15:56:02 +04:00
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* _ _ ____ _
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* Project ___| | | | _ \| |
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* / __| | | | |_) | |
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* | (__| |_| | _ <| |___
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1999-12-29 17:20:26 +03:00
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* \___|\___/|_| \_\_____|
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*
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2019-02-08 11:33:42 +03:00
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* Copyright (C) 1998 - 2019, Daniel Stenberg, <daniel@haxx.se>, et al.
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1999-12-29 17:20:26 +03:00
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*
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2002-09-03 15:52:59 +04:00
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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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2016-02-03 02:19:02 +03:00
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* are also available at https://curl.haxx.se/docs/copyright.html.
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2004-06-10 15:56:02 +04:00
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*
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2001-01-03 12:29:33 +03:00
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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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2002-09-03 15:52:59 +04:00
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* furnished to do so, under the terms of the COPYING file.
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1999-12-29 17:20:26 +03:00
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*
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2001-01-03 12:29:33 +03:00
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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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1999-12-29 17:20:26 +03:00
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*
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2002-09-03 15:52:59 +04:00
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***************************************************************************/
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1999-12-29 17:20:26 +03:00
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2013-01-06 22:06:49 +04:00
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#include "curl_setup.h"
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2013-01-04 05:50:28 +04:00
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#include "hash.h"
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2008-10-30 16:45:25 +03:00
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#include "curl_addrinfo.h"
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2013-01-04 05:50:28 +04:00
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#include "asyn.h"
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2002-01-07 23:52:32 +03:00
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2008-09-18 20:21:09 +04:00
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#ifdef HAVE_SETJMP_H
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#include <setjmp.h>
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#endif
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2007-07-01 00:08:13 +04:00
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#ifdef NETWARE
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2006-08-09 02:37:53 +04:00
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#undef in_addr_t
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2007-07-01 00:08:13 +04:00
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#define in_addr_t unsigned long
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2006-08-09 02:37:53 +04:00
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#endif
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2004-06-24 11:43:48 +04:00
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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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#define CURL_ASYNC_SUCCESS CURLE_OK
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2001-02-06 02:04:44 +03:00
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struct addrinfo;
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2001-09-28 11:05:26 +04:00
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struct hostent;
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2016-06-21 16:47:12 +03:00
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struct Curl_easy;
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2003-08-05 18:40:59 +04:00
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struct connectdata;
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2001-02-06 02:04:44 +03:00
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2008-01-16 01:15:55 +03:00
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/*
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* Curl_global_host_cache_init() initializes and sets up a global DNS cache.
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* Global DNS cache is general badness. Do not use. This will be removed in
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* a future version. Use the share interface instead!
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*
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2008-01-16 01:44:12 +03:00
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* Returns a struct curl_hash pointer on success, NULL on failure.
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2008-01-16 01:15:55 +03:00
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*/
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2008-01-16 01:44:12 +03:00
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struct curl_hash *Curl_global_host_cache_init(void);
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2002-01-07 23:52:32 +03:00
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void Curl_global_host_cache_dtor(void);
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2002-01-03 13:22:59 +03:00
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2002-11-05 13:51:41 +03:00
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struct Curl_dns_entry {
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Curl_addrinfo *addr;
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2015-03-17 11:09:43 +03:00
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/* timestamp == 0 -- CURLOPT_RESOLVE entry, doesn't timeout */
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2002-11-05 13:51:41 +03:00
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time_t timestamp;
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2015-03-17 11:09:43 +03:00
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/* use-counter, use Curl_resolv_unlock to release reference */
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long inuse;
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2002-11-05 13:51:41 +03:00
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};
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2002-11-12 01:36:00 +03:00
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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 "unlocked" with Curl_resolv_unlock() after
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* use, or we'll leak memory!
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*/
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2004-04-26 18:18:00 +04:00
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/* return codes */
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2008-09-30 01:02:22 +04:00
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#define CURLRESOLV_TIMEDOUT -2
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2004-04-26 18:18:00 +04:00
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#define CURLRESOLV_ERROR -1
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#define CURLRESOLV_RESOLVED 0
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#define CURLRESOLV_PENDING 1
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2019-05-09 11:58:04 +03:00
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int Curl_resolv(struct connectdata *conn,
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const char *hostname,
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int port,
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bool allowDOH,
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struct Curl_dns_entry **dnsentry);
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2008-09-30 01:02:22 +04:00
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int Curl_resolv_timeout(struct connectdata *conn, const char *hostname,
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int port, struct Curl_dns_entry **dnsentry,
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2016-11-18 12:07:08 +03:00
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time_t timeoutms);
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2002-11-05 13:51:41 +03:00
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2011-03-23 13:10:55 +03:00
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#ifdef CURLRES_IPV6
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/*
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2014-12-27 14:09:01 +03:00
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* Curl_ipv6works() returns TRUE if IPv6 seems to work.
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2011-03-23 13:10:55 +03:00
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*/
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bool Curl_ipv6works(void);
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#else
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#define Curl_ipv6works() FALSE
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#endif
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2004-04-26 11:20:11 +04:00
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/*
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* Curl_ipvalid() checks what CURL_IPRESOLVE_* requirements that might've
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* been set and returns TRUE if they are OK.
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*/
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2010-11-11 16:51:39 +03:00
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bool Curl_ipvalid(struct connectdata *conn);
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2004-04-26 11:20:11 +04:00
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2011-01-30 03:00:52 +03:00
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2004-04-26 11:20:11 +04:00
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/*
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* Curl_getaddrinfo() is the generic low-level name resolve API within this
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* source file. There are several versions of this function - for different
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* name resolve layers (selected at build-time). They all take this same set
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* of arguments
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*/
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Curl_addrinfo *Curl_getaddrinfo(struct connectdata *conn,
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2006-07-21 09:51:12 +04:00
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const char *hostname,
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2004-04-26 11:20:11 +04:00
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int port,
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int *waitp);
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2006-04-10 19:00:53 +04:00
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2002-11-12 01:36:00 +03:00
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/* unlock a previously resolved dns entry */
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2016-06-21 16:47:12 +03:00
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void Curl_resolv_unlock(struct Curl_easy *data,
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2006-04-10 19:00:53 +04:00
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struct Curl_dns_entry *dns);
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2002-11-12 01:36:00 +03:00
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2002-11-05 13:51:41 +03:00
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/* for debugging purposes only: */
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void Curl_scan_cache_used(void *user, void *ptr);
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2002-01-03 13:22:59 +03:00
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2015-05-12 10:46:53 +03:00
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/* init a new dns cache and return success */
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int Curl_mk_dnscache(struct curl_hash *hash);
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2001-10-04 17:25:12 +04:00
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2003-12-15 20:33:49 +03:00
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/* prune old entries from the DNS cache */
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2016-06-21 16:47:12 +03:00
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void Curl_hostcache_prune(struct Curl_easy *data);
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2003-12-15 20:33:49 +03:00
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2017-03-26 18:02:22 +03:00
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/* Return # of addresses in a Curl_addrinfo struct */
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2016-12-14 01:34:59 +03:00
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int Curl_num_addresses(const Curl_addrinfo *addr);
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2004-06-10 15:06:21 +04:00
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2008-10-30 22:02:23 +03:00
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#if defined(CURLDEBUG) && defined(HAVE_GETNAMEINFO)
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2006-07-03 22:38:03 +04:00
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int curl_dogetnameinfo(GETNAMEINFO_QUAL_ARG1 GETNAMEINFO_TYPE_ARG1 sa,
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GETNAMEINFO_TYPE_ARG2 salen,
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char *host, GETNAMEINFO_TYPE_ARG46 hostlen,
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char *serv, GETNAMEINFO_TYPE_ARG46 servlen,
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GETNAMEINFO_TYPE_ARG7 flags,
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2001-10-04 17:25:12 +04:00
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int line, const char *source);
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#endif
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1999-12-29 17:20:26 +03:00
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2010-01-26 02:50:13 +03:00
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/* IPv4 threadsafe resolve function used for synch and asynch builds */
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2016-11-23 09:53:24 +03:00
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Curl_addrinfo *Curl_ipv4_resolve_r(const char *hostname, int port);
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2010-01-26 02:50:13 +03:00
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2018-09-06 10:16:02 +03:00
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CURLcode Curl_once_resolved(struct connectdata *conn, bool *protocol_connect);
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2011-04-26 06:01:40 +04:00
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2010-01-22 09:36:52 +03:00
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/*
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* Curl_addrinfo_callback() is used when we build with any asynch specialty.
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* Handles end of async request processing. Inserts ai into hostcache when
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* status is CURL_ASYNC_SUCCESS. Twiddles fields in conn to indicate async
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2011-04-26 06:01:40 +04:00
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* request completed whether successful or failed.
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2010-01-22 09:36:52 +03:00
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*/
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CURLcode Curl_addrinfo_callback(struct connectdata *conn,
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int status,
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Curl_addrinfo *ai);
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2004-04-26 11:20:11 +04:00
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/*
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2004-06-10 15:55:37 +04:00
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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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2004-04-26 11:20:11 +04:00
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*/
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2004-06-24 11:43:48 +04:00
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const char *Curl_printable_address(const Curl_addrinfo *ip,
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2004-04-26 11:20:11 +04:00
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char *buf, size_t bufsize);
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2014-08-21 01:31:53 +04:00
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/*
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* Curl_fetch_addr() fetches a 'Curl_dns_entry' already in the DNS cache.
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*
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* Returns the Curl_dns_entry entry pointer or NULL if not in the cache.
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2015-03-17 11:26:36 +03:00
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*
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* The returned data *MUST* be "unlocked" with Curl_resolv_unlock() after
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* use, or we'll leak memory!
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2014-08-21 01:31:53 +04:00
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*/
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struct Curl_dns_entry *
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Curl_fetch_addr(struct connectdata *conn,
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const char *hostname,
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2015-01-07 01:01:43 +03:00
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int port);
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2018-03-17 22:10:04 +03:00
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2004-04-26 11:20:11 +04:00
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/*
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* Curl_cache_addr() stores a 'Curl_addrinfo' struct in the DNS cache.
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*
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* Returns the Curl_dns_entry entry pointer or NULL if the storage failed.
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*/
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struct Curl_dns_entry *
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2016-06-21 16:47:12 +03:00
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Curl_cache_addr(struct Curl_easy *data, Curl_addrinfo *addr,
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2006-07-21 09:51:12 +04:00
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const char *hostname, int port);
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2004-04-26 11:20:11 +04:00
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2003-05-13 16:12:17 +04:00
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#ifndef INADDR_NONE
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#define CURL_INADDR_NONE (in_addr_t) ~0
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#else
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#define CURL_INADDR_NONE INADDR_NONE
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#endif
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2008-09-18 20:21:09 +04:00
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#ifdef HAVE_SIGSETJMP
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2013-01-04 05:50:28 +04:00
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/* Forward-declaration of variable defined in hostip.c. Beware this
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2008-09-18 20:21:09 +04:00
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* is a global and unique instance. This is used to store the return
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* address that we can jump back to from inside a signal handler.
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* This is not thread-safe stuff.
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*/
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extern sigjmp_buf curl_jmpenv;
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#endif
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2003-05-13 16:12:17 +04:00
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2011-04-12 19:34:28 +04:00
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/*
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* Function provided by the resolver backend to set DNS servers to use.
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*/
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2016-06-21 16:47:12 +03:00
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CURLcode Curl_set_dns_servers(struct Curl_easy *data, char *servers);
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2011-04-12 19:34:28 +04:00
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2013-09-07 20:45:50 +04:00
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/*
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* Function provided by the resolver backend to set
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* outgoing interface to use for DNS requests
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*/
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2016-06-21 16:47:12 +03:00
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CURLcode Curl_set_dns_interface(struct Curl_easy *data,
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2013-09-17 23:59:43 +04:00
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const char *interf);
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2013-09-07 20:45:50 +04:00
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/*
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* Function provided by the resolver backend to set
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* local IPv4 address to use as source address for DNS requests
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*/
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2016-06-21 16:47:12 +03:00
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CURLcode Curl_set_dns_local_ip4(struct Curl_easy *data,
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2013-09-07 20:45:50 +04:00
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const char *local_ip4);
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/*
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* Function provided by the resolver backend to set
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* local IPv6 address to use as source address for DNS requests
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*/
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2016-06-21 16:47:12 +03:00
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CURLcode Curl_set_dns_local_ip6(struct Curl_easy *data,
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2013-09-07 20:45:50 +04:00
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const char *local_ip6);
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2012-11-18 19:17:37 +04:00
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/*
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* Clean off entries from the cache
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*/
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2016-06-21 16:47:12 +03:00
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void Curl_hostcache_clean(struct Curl_easy *data, struct curl_hash *hash);
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2012-11-18 19:17:37 +04:00
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2011-12-23 17:30:43 +04:00
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/*
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* Destroy the hostcache of this handle.
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*/
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2016-06-21 16:47:12 +03:00
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void Curl_hostcache_destroy(struct Curl_easy *data);
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2011-12-23 17:30:43 +04:00
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2012-11-18 19:17:37 +04:00
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/*
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* Populate the cache with specified entries from CURLOPT_RESOLVE.
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*/
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2016-06-21 16:47:12 +03:00
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CURLcode Curl_loadhostpairs(struct Curl_easy *data);
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2011-12-31 13:28:10 +04:00
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2018-09-06 10:16:02 +03:00
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CURLcode Curl_resolv_check(struct connectdata *conn,
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struct Curl_dns_entry **dns);
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int Curl_resolv_getsock(struct connectdata *conn,
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curl_socket_t *socks,
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int numsocks);
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2010-01-26 02:50:13 +03:00
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#endif /* HEADER_CURL_HOSTIP_H */
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