mirror of
https://github.com/moparisthebest/curl
synced 2024-11-07 10:05:06 -05:00
227 lines
7.1 KiB
C
227 lines
7.1 KiB
C
#ifndef __HOSTIP_H
|
|
#define __HOSTIP_H
|
|
/***************************************************************************
|
|
* _ _ ____ _
|
|
* Project ___| | | | _ \| |
|
|
* / __| | | | |_) | |
|
|
* | (__| |_| | _ <| |___
|
|
* \___|\___/|_| \_\_____|
|
|
*
|
|
* Copyright (C) 1998 - 2004, 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"
|
|
|
|
struct addrinfo;
|
|
struct hostent;
|
|
struct SessionHandle;
|
|
struct connectdata;
|
|
|
|
void Curl_global_host_cache_init(void);
|
|
void Curl_global_host_cache_dtor(void);
|
|
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_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_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 */
|
|
curl_hash *Curl_mk_dnscache(void);
|
|
|
|
/* prune old entries from the DNS cache */
|
|
void Curl_hostcache_prune(struct SessionHandle *data);
|
|
|
|
#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 */
|
|
void Curl_addrinfo_callback(void *arg,
|
|
int status,
|
|
Curl_addrinfo *hostent);
|
|
|
|
/* This is a utility-function for ipv4-builds to create a hostent struct
|
|
from a numerical-only IP address */
|
|
Curl_addrinfo *Curl_ip2addr(in_addr_t num, char *hostname);
|
|
|
|
/* relocate a hostent struct */
|
|
void Curl_hostent_relocate(struct hostent *h, long offset);
|
|
|
|
/* copy a Curl_addrinfo struct, currently this only supports copying
|
|
a hostent (ipv4-style) struct */
|
|
Curl_addrinfo *Curl_addrinfo_copy(Curl_addrinfo *orig);
|
|
|
|
/*
|
|
* (IPv6) Curl_printable_address() returns a printable version of the
|
|
* ai->ai_addr address given in the 2nd argument. The first should be the
|
|
* ai->ai_family and the result will be stored in the buf that is bufsize
|
|
* bytes big.
|
|
*/
|
|
const char *Curl_printable_address(int af, void *addr,
|
|
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
|
|
|
|
/*
|
|
* 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
|
|
#define CURLRES_HOSTENT_RELOCATE
|
|
#endif
|
|
#endif /* IPv4-only */
|
|
|
|
#ifdef HAVE_GETHOSTBYNAME_R_6
|
|
#define CURLRES_HOSTENT_RELOCATE
|
|
#endif
|
|
|
|
#ifdef HAVE_GETHOSTBYNAME_R_5
|
|
#define CURLRES_HOSTENT_RELOCATE
|
|
#endif
|
|
|
|
#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
|
|
|
|
#endif
|