Skip to content
This repository

HTTPS clone URL

Subversion checkout URL

You can clone with HTTPS or Subversion.

Download ZIP
tag: curl-7_13_1
Fetching contributors…

Cannot retrieve contributors at this time

file 252 lines (211 sloc) 8.128 kb
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252
#ifndef __HOSTIP_H
#define __HOSTIP_H
/***************************************************************************
* _ _ ____ _
* Project ___| | | | _ \| |
* / __| | | | |_) | |
* | (__| |_| | _ <| |___
* \___|\___/|_| \_\_____|
*
* Copyright (C) 1998 - 2005, Daniel Stenberg, <daniel@haxx.se>, et al.
*
* This software is licensed as described in the file COPYING, which
* you should have received as part of this distribution. The terms
* are also available at http://curl.haxx.se/docs/copyright.html.
*
* You may opt to use, copy, modify, merge, publish, distribute and/or sell
* copies of the Software, and permit persons to whom the Software is
* furnished to do so, under the terms of the COPYING file.
*
* This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
* KIND, either express or implied.
*
* $Id$
***************************************************************************/

#include "setup.h"
#include "hash.h"

/*
* Setup comfortable CURLRES_* defines to use in the host*.c sources.
*/

#ifdef USE_ARES
#define CURLRES_ASYNCH
#define CURLRES_ARES
#endif

#ifdef USE_THREADING_GETHOSTBYNAME
#define CURLRES_ASYNCH
#define CURLRES_THREADED
#endif

#ifdef USE_THREADING_GETADDRINFO
#define CURLRES_ASYNCH
#define CURLRES_THREADED
#endif

#ifdef ENABLE_IPV6
#define CURLRES_IPV6
#else
#define CURLRES_IPV4
#endif

#ifdef CURLRES_IPV4
#if !defined(HAVE_GETHOSTBYNAME_R) || defined(CURLRES_ASYNCH)
/* If built for ipv4 and missing gethostbyname_r(), or if using async name
resolve, we need the Curl_addrinfo_copy() function (which itself needs the
Curl_hostent_relocate() function)) */
#define CURLRES_ADDRINFO_COPY
#endif
#endif /* IPv4-only */

#ifndef CURLRES_ASYNCH
#define CURLRES_SYNCH
#endif

#ifndef USE_LIBIDN
#define CURLRES_IDN
#endif

/* Allocate enough memory to hold the full name information structs and
* everything. OSF1 is known to require at least 8872 bytes. The buffer
* required for storing all possible aliases and IP numbers is according to
* Stevens' Unix Network Programming 2nd edition, p. 304: 8192 bytes!
*/
#define CURL_HOSTENT_SIZE 9000

#define CURL_TIMEOUT_RESOLVE 300 /* when using asynch methods, we allow this
many seconds for a name resolve */

#ifdef CURLRES_ARES
#define CURL_ASYNC_SUCCESS ARES_SUCCESS
#else
#define CURL_ASYNC_SUCCESS CURLE_OK
#endif

/*
* Curl_addrinfo MUST be used for all name resolved info.
*/
#ifdef CURLRES_IPV6
typedef struct addrinfo Curl_addrinfo;
#else
/* OK, so some ipv4-only include tree probably have the addrinfo struct, but
to work even on those that don't, we provide our own look-alike! */
struct Curl_addrinfo {
  int ai_flags;
  int ai_family;
  int ai_socktype;
  int ai_protocol;
  size_t ai_addrlen;
  struct sockaddr *ai_addr;
  char *ai_canonname;
  struct Curl_addrinfo *ai_next;
};
typedef struct Curl_addrinfo Curl_addrinfo;
#endif

struct addrinfo;
struct hostent;
struct SessionHandle;
struct connectdata;

void Curl_global_host_cache_init(void);
void Curl_global_host_cache_dtor(void);
struct curl_hash *Curl_global_host_cache_get(void);

#define Curl_global_host_cache_use(__p) ((__p)->set.global_dns_cache)

struct Curl_dns_entry {
  Curl_addrinfo *addr;
  time_t timestamp;
  long inuse; /* use-counter, make very sure you decrease this
when you're done using the address you received */
};

/*
* Curl_resolv() returns an entry with the info for the specified host
* and port.
*
* The returned data *MUST* be "unlocked" with Curl_resolv_unlock() after
* use, or we'll leak memory!
*/
/* return codes */
#define CURLRESOLV_ERROR -1
#define CURLRESOLV_RESOLVED 0
#define CURLRESOLV_PENDING 1
int Curl_resolv(struct connectdata *conn, char *hostname,
                int port, struct Curl_dns_entry **dnsentry);

/*
* Curl_ipvalid() checks what CURL_IPRESOLVE_* requirements that might've
* been set and returns TRUE if they are OK.
*/
bool Curl_ipvalid(struct SessionHandle *data);

/*
* Curl_getaddrinfo() is the generic low-level name resolve API within this
* source file. There are several versions of this function - for different
* name resolve layers (selected at build-time). They all take this same set
* of arguments
*/
Curl_addrinfo *Curl_getaddrinfo(struct connectdata *conn,
                                char *hostname,
                                int port,
                                int *waitp);

CURLcode Curl_is_resolved(struct connectdata *conn,
                          struct Curl_dns_entry **dns);
CURLcode Curl_wait_for_resolv(struct connectdata *conn,
                              struct Curl_dns_entry **dnsentry);

/* Curl_resolv_fdset() is a generic function that exists in multiple versions
depending on what name resolve technology we've built to use. The function
is called from the curl_multi_fdset() function */
CURLcode Curl_resolv_fdset(struct connectdata *conn,
                           fd_set *read_fd_set,
                           fd_set *write_fd_set,
                           int *max_fdp);
/* unlock a previously resolved dns entry */
void Curl_resolv_unlock(struct SessionHandle *data, struct Curl_dns_entry *dns);

/* for debugging purposes only: */
void Curl_scan_cache_used(void *user, void *ptr);

/* free name info */
void Curl_freeaddrinfo(Curl_addrinfo *freeaddr);

/* make a new dns cache and return the handle */
struct curl_hash *Curl_mk_dnscache(void);

/* prune old entries from the DNS cache */
void Curl_hostcache_prune(struct SessionHandle *data);

/* Return # of adresses in a Curl_addrinfo struct */
int Curl_num_addresses (const Curl_addrinfo *addr);

#ifdef CURLDEBUG
void curl_dofreeaddrinfo(struct addrinfo *freethis,
                         int line, const char *source);
int curl_dogetaddrinfo(char *hostname, char *service,
                       struct addrinfo *hints,
                       struct addrinfo **result,
                       int line, const char *source);
int curl_dogetnameinfo(const struct sockaddr *sa, socklen_t salen,
                       char *host, size_t hostlen,
                       char *serv, size_t servlen, int flags,
                       int line, const char *source);
#endif

/* This is the callback function that is used when we build with asynch
resolve, ipv4 */
CURLcode Curl_addrinfo4_callback(void *arg,
                                 int status,
                                 struct hostent *hostent);
/* This is the callback function that is used when we build with asynch
resolve, ipv6 */
CURLcode Curl_addrinfo6_callback(void *arg,
                                 int status,
                                 struct addrinfo *ai);


/* [ipv4 only] Creates a Curl_addrinfo struct from a numerical-only IP
address */
Curl_addrinfo *Curl_ip2addr(in_addr_t num, char *hostname, int port);

/* [ipv4 only] Curl_he2ai() converts a struct hostent to a Curl_addrinfo chain
and returns it */
Curl_addrinfo *Curl_he2ai(struct hostent *, int port);

/* relocate a hostent struct */
void Curl_hostent_relocate(struct hostent *h, long offset);

/* Clone a Curl_addrinfo struct, works protocol independently */
Curl_addrinfo *Curl_addrinfo_copy(void *orig, int port);

/*
* Curl_printable_address() returns a printable version of the 1st address
* given in the 'ip' argument. The result will be stored in the buf that is
* bufsize bytes big.
*/
const char *Curl_printable_address(const Curl_addrinfo *ip,
                                   char *buf, size_t bufsize);

/*
* Curl_cache_addr() stores a 'Curl_addrinfo' struct in the DNS cache.
*
* Returns the Curl_dns_entry entry pointer or NULL if the storage failed.
*/
struct Curl_dns_entry *
Curl_cache_addr(struct SessionHandle *data, Curl_addrinfo *addr,
                char *hostname, int port);

#ifndef INADDR_NONE
#define CURL_INADDR_NONE (in_addr_t) ~0
#else
#define CURL_INADDR_NONE INADDR_NONE
#endif




#endif
Something went wrong with that request. Please try again.