67eb679264
Move ipv6-functional-probe into a single function that is used from all places that need to know. Make the probe function store the result in a static variable so that subsequent invokes just returns the previous result and won't have to probe again.
235 lines
7.9 KiB
C
235 lines
7.9 KiB
C
#ifndef HEADER_CURL_HOSTIP_H
|
|
#define HEADER_CURL_HOSTIP_H
|
|
/***************************************************************************
|
|
* _ _ ____ _
|
|
* Project ___| | | | _ \| |
|
|
* / __| | | | |_) | |
|
|
* | (__| |_| | _ <| |___
|
|
* \___|\___/|_| \_\_____|
|
|
*
|
|
* Copyright (C) 1998 - 2011, 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.
|
|
*
|
|
***************************************************************************/
|
|
|
|
#include "setup.h"
|
|
#include "hash.h"
|
|
#include "curl_addrinfo.h"
|
|
|
|
#ifdef HAVE_SETJMP_H
|
|
#include <setjmp.h>
|
|
#endif
|
|
|
|
#ifdef NETWARE
|
|
#undef in_addr_t
|
|
#define in_addr_t unsigned long
|
|
#endif
|
|
|
|
/*
|
|
* Comfortable CURLRES_* definitions are included from setup.h
|
|
*/
|
|
|
|
#ifdef USE_ARES
|
|
#include <ares_version.h>
|
|
#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
|
|
#if ARES_VERSION >= 0x010500
|
|
/* c-ares 1.5.0 or later, the callback proto is modified */
|
|
#define HAVE_CARES_CALLBACK_TIMEOUTS 1
|
|
#endif
|
|
#else
|
|
#define CURL_ASYNC_SUCCESS CURLE_OK
|
|
#define ares_cancel(x) do {} while(0)
|
|
#define ares_destroy(x) do {} while(0)
|
|
#endif
|
|
|
|
struct addrinfo;
|
|
struct hostent;
|
|
struct SessionHandle;
|
|
struct connectdata;
|
|
|
|
#ifdef CURLRES_ASYNCH
|
|
void Curl_async_cancel(struct connectdata *conn);
|
|
#else
|
|
#define Curl_async_cancel(x) do {} while(0)
|
|
#endif
|
|
|
|
/*
|
|
* Curl_global_host_cache_init() initializes and sets up a global DNS cache.
|
|
* Global DNS cache is general badness. Do not use. This will be removed in
|
|
* a future version. Use the share interface instead!
|
|
*
|
|
* Returns a struct curl_hash pointer on success, NULL on failure.
|
|
*/
|
|
struct curl_hash *Curl_global_host_cache_init(void);
|
|
void Curl_global_host_cache_dtor(void);
|
|
|
|
struct Curl_dns_entry {
|
|
Curl_addrinfo *addr;
|
|
/* timestamp == 0 -- entry not in hostcache
|
|
timestamp != 0 -- entry is in hostcache */
|
|
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_TIMEDOUT -2
|
|
#define CURLRESOLV_ERROR -1
|
|
#define CURLRESOLV_RESOLVED 0
|
|
#define CURLRESOLV_PENDING 1
|
|
int Curl_resolv(struct connectdata *conn, const char *hostname,
|
|
int port, struct Curl_dns_entry **dnsentry);
|
|
int Curl_resolv_timeout(struct connectdata *conn, const char *hostname,
|
|
int port, struct Curl_dns_entry **dnsentry,
|
|
long timeoutms);
|
|
|
|
#ifdef CURLRES_IPV6
|
|
/*
|
|
* Curl_ipv6works() returns TRUE if ipv6 seems to work.
|
|
*/
|
|
bool Curl_ipv6works(void);
|
|
#else
|
|
#define Curl_ipv6works() FALSE
|
|
#endif
|
|
|
|
/*
|
|
* Curl_ipvalid() checks what CURL_IPRESOLVE_* requirements that might've
|
|
* been set and returns TRUE if they are OK.
|
|
*/
|
|
bool Curl_ipvalid(struct connectdata *conn);
|
|
|
|
/*
|
|
* 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,
|
|
const 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_getsock() 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 multi_getsock() function. 'sock' is a pointer
|
|
to an array to hold the file descriptors, with 'numsock' being the size of
|
|
that array (in number of entries). This function is supposed to return
|
|
bitmask indicating what file descriptors (referring to array indexes in the
|
|
'sock' array) to wait for, read/write. */
|
|
int Curl_resolv_getsock(struct connectdata *conn, curl_socket_t *sock,
|
|
int numsocks);
|
|
|
|
/* 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);
|
|
|
|
/* 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);
|
|
|
|
#if defined(CURLDEBUG) && defined(HAVE_GETNAMEINFO)
|
|
int curl_dogetnameinfo(GETNAMEINFO_QUAL_ARG1 GETNAMEINFO_TYPE_ARG1 sa,
|
|
GETNAMEINFO_TYPE_ARG2 salen,
|
|
char *host, GETNAMEINFO_TYPE_ARG46 hostlen,
|
|
char *serv, GETNAMEINFO_TYPE_ARG46 servlen,
|
|
GETNAMEINFO_TYPE_ARG7 flags,
|
|
int line, const char *source);
|
|
#endif
|
|
|
|
/* IPv4 threadsafe resolve function used for synch and asynch builds */
|
|
Curl_addrinfo *Curl_ipv4_resolve_r(const char * hostname, int port);
|
|
|
|
/*
|
|
* Curl_addrinfo_callback() is used when we build with any asynch specialty.
|
|
* Handles end of async request processing. Inserts ai into hostcache when
|
|
* status is CURL_ASYNC_SUCCESS. Twiddles fields in conn to indicate async
|
|
* request completed wether successfull or failed.
|
|
*/
|
|
CURLcode Curl_addrinfo_callback(struct connectdata *conn,
|
|
int status,
|
|
Curl_addrinfo *ai);
|
|
|
|
/*
|
|
* 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,
|
|
const char *hostname, int port);
|
|
|
|
/*
|
|
* Curl_destroy_thread_data() cleans up async resolver data.
|
|
* Complementary of ares_destroy.
|
|
*/
|
|
struct Curl_async; /* forward-declaration */
|
|
void Curl_destroy_thread_data(struct Curl_async *async);
|
|
|
|
#ifndef INADDR_NONE
|
|
#define CURL_INADDR_NONE (in_addr_t) ~0
|
|
#else
|
|
#define CURL_INADDR_NONE INADDR_NONE
|
|
#endif
|
|
|
|
#ifdef HAVE_SIGSETJMP
|
|
/* Forward-declaration of variable defined in hostip.c. Beware this
|
|
* is a global and unique instance. This is used to store the return
|
|
* address that we can jump back to from inside a signal handler.
|
|
* This is not thread-safe stuff.
|
|
*/
|
|
extern sigjmp_buf curl_jmpenv;
|
|
#endif
|
|
|
|
#endif /* HEADER_CURL_HOSTIP_H */
|