| #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" |
| |
| #ifdef HAVE_NETDB_H |
| #include <netdb.h> |
| #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 |
| #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 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); |
| |
| /* 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 */ |
| void 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 */ |
| void 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 |