diff options
Diffstat (limited to 'libcurl/src/lib/hostip.h')
| -rw-r--r-- | libcurl/src/lib/hostip.h | 250 |
1 files changed, 250 insertions, 0 deletions
diff --git a/libcurl/src/lib/hostip.h b/libcurl/src/lib/hostip.h new file mode 100644 index 0000000..2102c18 --- /dev/null +++ b/libcurl/src/lib/hostip.h @@ -0,0 +1,250 @@ +#ifndef HEADER_CURL_HOSTIP_H
+#define HEADER_CURL_HOSTIP_H
+/***************************************************************************
+ * _ _ ____ _
+ * Project ___| | | | _ \| |
+ * / __| | | | |_) | |
+ * | (__| |_| | _ <| |___
+ * \___|\___/|_| \_\_____|
+ *
+ * Copyright (C) 1998 - 2015, 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 "curl_setup.h"
+#include "hash.h"
+#include "curl_addrinfo.h"
+#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 SessionHandle;
+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.
+ */
+CURL_STATIC struct curl_hash *Curl_global_host_cache_init(void);
+CURL_STATIC void Curl_global_host_cache_dtor(void);
+
+struct Curl_dns_entry {
+ Curl_addrinfo *addr;
+ /* timestamp == 0 -- CURLOPT_RESOLVE entry, doesn't timeout */
+ 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 */
+#define CURLRESOLV_TIMEDOUT -2
+#define CURLRESOLV_ERROR -1
+#define CURLRESOLV_RESOLVED 0
+#define CURLRESOLV_PENDING 1
+CURL_STATIC int Curl_resolv(struct connectdata *conn, const char *hostname,
+ int port, struct Curl_dns_entry **dnsentry);
+CURL_STATIC 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.
+ */
+CURL_STATIC 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.
+ */
+CURL_STATIC 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_STATIC Curl_addrinfo *Curl_getaddrinfo(struct connectdata *conn,
+ const char *hostname,
+ int port,
+ int *waitp);
+
+
+/* unlock a previously resolved dns entry */
+CURL_STATIC void Curl_resolv_unlock(struct SessionHandle *data,
+ struct Curl_dns_entry *dns);
+
+/* for debugging purposes only: */
+CURL_STATIC void Curl_scan_cache_used(void *user, void *ptr);
+
+/* make a new dns cache and return the handle */
+CURL_STATIC struct curl_hash *Curl_mk_dnscache(void);
+
+/* prune old entries from the DNS cache */
+CURL_STATIC void Curl_hostcache_prune(struct SessionHandle *data);
+
+/* Return # of adresses in a Curl_addrinfo struct */
+CURL_STATIC 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_STATIC Curl_addrinfo *Curl_ipv4_resolve_r(const char * hostname, int port);
+
+CURL_STATIC CURLcode Curl_async_resolved(struct connectdata *conn,
+ bool *protocol_connect);
+
+#ifndef CURLRES_ASYNCH
+#define Curl_async_resolved(x,y) CURLE_OK
+#endif
+
+/*
+ * 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.
+ */
+CURL_STATIC 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.
+ */
+CURL_STATIC const char *Curl_printable_address(const 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!
+ */
+CURL_STATIC struct Curl_dns_entry *
+Curl_fetch_addr(struct connectdata *conn,
+ 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.
+ */
+CURL_STATIC struct Curl_dns_entry *
+Curl_cache_addr(struct SessionHandle *data, 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.
+ */
+CURL_STATIC CURLcode Curl_set_dns_servers(struct SessionHandle *data, char *servers);
+
+/*
+ * Function provided by the resolver backend to set
+ * outgoing interface to use for DNS requests
+ */
+CURL_STATIC CURLcode Curl_set_dns_interface(struct SessionHandle *data,
+ const char *interf);
+
+/*
+ * Function provided by the resolver backend to set
+ * local IPv4 address to use as source address for DNS requests
+ */
+CURL_STATIC CURLcode Curl_set_dns_local_ip4(struct SessionHandle *data,
+ const char *local_ip4);
+
+/*
+ * Function provided by the resolver backend to set
+ * local IPv6 address to use as source address for DNS requests
+ */
+CURL_STATIC CURLcode Curl_set_dns_local_ip6(struct SessionHandle *data,
+ const char *local_ip6);
+
+/*
+ * Clean off entries from the cache
+ */
+CURL_STATIC void Curl_hostcache_clean(struct SessionHandle *data, struct curl_hash *hash);
+
+/*
+ * Destroy the hostcache of this handle.
+ */
+CURL_STATIC void Curl_hostcache_destroy(struct SessionHandle *data);
+
+/*
+ * Populate the cache with specified entries from CURLOPT_RESOLVE.
+ */
+CURL_STATIC CURLcode Curl_loadhostpairs(struct SessionHandle *data);
+
+#endif /* HEADER_CURL_HOSTIP_H */
|