first commit
This commit is contained in:
@@ -0,0 +1,248 @@
|
||||
#ifndef HEADER_CURL_HOSTIP_H
|
||||
#define HEADER_CURL_HOSTIP_H
|
||||
/***************************************************************************
|
||||
* _ _ ____ _
|
||||
* Project ___| | | | _ \| |
|
||||
* / __| | | | |_) | |
|
||||
* | (__| |_| | _ <| |___
|
||||
* \___|\___/|_| \_\_____|
|
||||
*
|
||||
* Copyright (C) 1998 - 2021, Daniel Stenberg, <[email protected]>, 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 https://curl.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 "curl_setup.h"
|
||||
#include "hash.h"
|
||||
#include "curl_addrinfo.h"
|
||||
#include "timeval.h" /* for timediff_t */
|
||||
#include "asyn.h"
|
||||
|
||||
#ifdef HAVE_SETJMP_H
|
||||
#include <setjmp.h>
|
||||
#endif
|
||||
|
||||
#ifdef NETWARE
|
||||
#undef in_addr_t
|
||||
#define in_addr_t unsigned long
|
||||
#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 */
|
||||
|
||||
#define CURL_ASYNC_SUCCESS CURLE_OK
|
||||
|
||||
struct addrinfo;
|
||||
struct hostent;
|
||||
struct Curl_easy;
|
||||
struct connectdata;
|
||||
|
||||
/*
|
||||
* 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);
|
||||
|
||||
struct Curl_dns_entry {
|
||||
struct Curl_addrinfo *addr;
|
||||
/* timestamp == 0 -- permanent CURLOPT_RESOLVE entry (doesn't time out) */
|
||||
time_t timestamp;
|
||||
/* use-counter, use Curl_resolv_unlock to release reference */
|
||||
long inuse;
|
||||
};
|
||||
|
||||
/*
|
||||
* 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 */
|
||||
enum resolve_t {
|
||||
CURLRESOLV_TIMEDOUT = -2,
|
||||
CURLRESOLV_ERROR = -1,
|
||||
CURLRESOLV_RESOLVED = 0,
|
||||
CURLRESOLV_PENDING = 1
|
||||
};
|
||||
enum resolve_t Curl_resolv(struct Curl_easy *data,
|
||||
const char *hostname,
|
||||
int port,
|
||||
bool allowDOH,
|
||||
struct Curl_dns_entry **dnsentry);
|
||||
enum resolve_t Curl_resolv_timeout(struct Curl_easy *data,
|
||||
const char *hostname, int port,
|
||||
struct Curl_dns_entry **dnsentry,
|
||||
timediff_t timeoutms);
|
||||
|
||||
#ifdef CURLRES_IPV6
|
||||
/*
|
||||
* Curl_ipv6works() returns TRUE if IPv6 seems to work.
|
||||
*/
|
||||
bool Curl_ipv6works(struct Curl_easy *data);
|
||||
#else
|
||||
#define Curl_ipv6works(x) 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 Curl_easy *data, 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
|
||||
*/
|
||||
struct Curl_addrinfo *Curl_getaddrinfo(struct Curl_easy *data,
|
||||
const char *hostname,
|
||||
int port,
|
||||
int *waitp);
|
||||
|
||||
|
||||
/* unlock a previously resolved dns entry */
|
||||
void Curl_resolv_unlock(struct Curl_easy *data,
|
||||
struct Curl_dns_entry *dns);
|
||||
|
||||
/* init a new dns cache and return success */
|
||||
int Curl_mk_dnscache(struct Curl_hash *hash);
|
||||
|
||||
/* prune old entries from the DNS cache */
|
||||
void Curl_hostcache_prune(struct Curl_easy *data);
|
||||
|
||||
/* Return # of addresses in a Curl_addrinfo struct */
|
||||
int Curl_num_addresses(const struct 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 */
|
||||
struct Curl_addrinfo *Curl_ipv4_resolve_r(const char *hostname, int port);
|
||||
|
||||
CURLcode Curl_once_resolved(struct Curl_easy *data, bool *protocol_connect);
|
||||
|
||||
/*
|
||||
* 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 whether successful or failed.
|
||||
*/
|
||||
CURLcode Curl_addrinfo_callback(struct Curl_easy *data,
|
||||
int status,
|
||||
struct 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.
|
||||
*/
|
||||
void Curl_printable_address(const struct Curl_addrinfo *ip,
|
||||
char *buf, size_t bufsize);
|
||||
|
||||
/*
|
||||
* Curl_fetch_addr() fetches a 'Curl_dns_entry' already in the DNS cache.
|
||||
*
|
||||
* Returns the Curl_dns_entry entry pointer or NULL if not in the cache.
|
||||
*
|
||||
* The returned data *MUST* be "unlocked" with Curl_resolv_unlock() after
|
||||
* use, or we'll leak memory!
|
||||
*/
|
||||
struct Curl_dns_entry *
|
||||
Curl_fetch_addr(struct Curl_easy *data,
|
||||
const char *hostname,
|
||||
int port);
|
||||
|
||||
/*
|
||||
* 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 Curl_easy *data, struct Curl_addrinfo *addr,
|
||||
const char *hostname, int port);
|
||||
|
||||
#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
|
||||
|
||||
/*
|
||||
* Function provided by the resolver backend to set DNS servers to use.
|
||||
*/
|
||||
CURLcode Curl_set_dns_servers(struct Curl_easy *data, char *servers);
|
||||
|
||||
/*
|
||||
* Function provided by the resolver backend to set
|
||||
* outgoing interface to use for DNS requests
|
||||
*/
|
||||
CURLcode Curl_set_dns_interface(struct Curl_easy *data,
|
||||
const char *interf);
|
||||
|
||||
/*
|
||||
* Function provided by the resolver backend to set
|
||||
* local IPv4 address to use as source address for DNS requests
|
||||
*/
|
||||
CURLcode Curl_set_dns_local_ip4(struct Curl_easy *data,
|
||||
const char *local_ip4);
|
||||
|
||||
/*
|
||||
* Function provided by the resolver backend to set
|
||||
* local IPv6 address to use as source address for DNS requests
|
||||
*/
|
||||
CURLcode Curl_set_dns_local_ip6(struct Curl_easy *data,
|
||||
const char *local_ip6);
|
||||
|
||||
/*
|
||||
* Clean off entries from the cache
|
||||
*/
|
||||
void Curl_hostcache_clean(struct Curl_easy *data, struct Curl_hash *hash);
|
||||
|
||||
/*
|
||||
* Populate the cache with specified entries from CURLOPT_RESOLVE.
|
||||
*/
|
||||
CURLcode Curl_loadhostpairs(struct Curl_easy *data);
|
||||
CURLcode Curl_resolv_check(struct Curl_easy *data,
|
||||
struct Curl_dns_entry **dns);
|
||||
int Curl_resolv_getsock(struct Curl_easy *data,
|
||||
curl_socket_t *socks);
|
||||
|
||||
#endif /* HEADER_CURL_HOSTIP_H */
|
||||
Reference in New Issue
Block a user