lib/hostip.h

   1 #ifndef __HOSTIP_H
   2 #define __HOSTIP_H
   3 /***************************************************************************
   4  *                                  _   _ ____  _
   5  *  Project                     ___| | | |  _ \| |
   6  *                             / __| | | | |_) | |
   7  *                            | (__| |_| |  _ <| |___
   8  *                             \___|\___/|_| \_\_____|
   9  *
  10  * Copyright (C) 1998 - 2004, Daniel Stenberg, <daniel@haxx.se>, et al.
  11  *
  12  * This software is licensed as described in the file COPYING, which
  13  * you should have received as part of this distribution. The terms
  14  * are also available at http://curl.haxx.se/docs/copyright.html.
  15  *
  16  * You may opt to use, copy, modify, merge, publish, distribute and/or sell
  17  * copies of the Software, and permit persons to whom the Software is
  18  * furnished to do so, under the terms of the COPYING file.
  19  *
  20  * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
  21  * KIND, either express or implied.
  22  *
  23  * $Id$
  24  ***************************************************************************/
  25
  26 #include "setup.h"
  27 #include "hash.h"
  28
  29 struct addrinfo;
  30 struct hostent;
  31 struct SessionHandle;
  32 struct connectdata;
  33
  34 void Curl_global_host_cache_init(void);
  35 void Curl_global_host_cache_dtor(void);
  36 curl_hash *Curl_global_host_cache_get(void);
  37
  38 #define Curl_global_host_cache_use(__p) ((__p)->set.global_dns_cache)
  39
  40 struct Curl_dns_entry {
  41   Curl_addrinfo *addr;
  42   time_t timestamp;
  43   long inuse;      /* use-counter, make very sure you decrease this
  44                       when you're done using the address you received */
  45 };
  46
  47 /*
  48  * Curl_resolv() returns an entry with the info for the specified host
  49  * and port.
  50  *
  51  * The returned data *MUST* be "unlocked" with Curl_resolv_unlock() after
  52  * use, or we'll leak memory!
  53  */
  54
  55 int Curl_resolv(struct connectdata *conn,
  56                 char *hostname,
  57                 int port,
  58                 struct Curl_dns_entry **dnsentry);
  59
  60 CURLcode Curl_is_resolved(struct connectdata *conn,
  61                           struct Curl_dns_entry **dns);
  62 CURLcode Curl_wait_for_resolv(struct connectdata *conn,
  63                               struct Curl_dns_entry **dnsentry);
  64 CURLcode Curl_multi_ares_fdset(struct connectdata *conn,
  65                                fd_set *read_fd_set,
  66                                fd_set *write_fd_set,
  67                                int *max_fdp);
  68 /* unlock a previously resolved dns entry */
  69 void Curl_resolv_unlock(struct SessionHandle *data, struct Curl_dns_entry *dns);
  70
  71 /* for debugging purposes only: */
  72 void Curl_scan_cache_used(void *user, void *ptr);
  73
  74 /* free name info */
  75 void Curl_freeaddrinfo(Curl_addrinfo *freeaddr);
  76
  77 /* free cached name info */
  78 void Curl_freednsinfo(void *freethis);
  79
  80 /* prune old entries from the DNS cache */
  81 void Curl_hostcache_prune(struct SessionHandle *data);
  82
  83 #ifdef CURLDEBUG
  84 void curl_freeaddrinfo(struct addrinfo *freethis,
  85                        int line, const char *source);
  86 int curl_getaddrinfo(char *hostname, char *service,
  87                      struct addrinfo *hints,
  88                      struct addrinfo **result,
  89                      int line, const char *source);
  90 #endif
  91
  92 #ifndef INADDR_NONE
  93 #define CURL_INADDR_NONE (in_addr_t) ~0
  94 #else
  95 #define CURL_INADDR_NONE INADDR_NONE
  96 #endif
  97
  98
  99 #endif