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Diffstat (limited to 'Utilities/cmcurl/lib/hostip.h')
| -rw-r--r-- | Utilities/cmcurl/lib/hostip.h | 261 |
1 files changed, 261 insertions, 0 deletions
diff --git a/Utilities/cmcurl/lib/hostip.h b/Utilities/cmcurl/lib/hostip.h new file mode 100644 index 0000000..1de4bee --- /dev/null +++ b/Utilities/cmcurl/lib/hostip.h @@ -0,0 +1,261 @@ +#ifndef HEADER_CURL_HOSTIP_H +#define HEADER_CURL_HOSTIP_H +/*************************************************************************** + * _ _ ____ _ + * Project ___| | | | _ \| | + * / __| | | | |_) | | + * | (__| |_| | _ <| |___ + * \___|\___/|_| \_\_____| + * + * Copyright (C) 1998 - 2018, 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 https://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 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); +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 +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, + time_t 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); + + +/* unlock a previously resolved dns entry */ +void Curl_resolv_unlock(struct Curl_easy *data, + struct Curl_dns_entry *dns); + +/* for debugging purposes only: */ +void Curl_scan_cache_used(void *user, void *ptr); + +/* 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 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); + +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. + */ +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_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 connectdata *conn, + const char *hostname, + int port); + +/* + * Curl_shuffle_addr() shuffles the order of addresses in a 'Curl_addrinfo' + * struct by re-linking its linked list. + * + * The addr argument should be the address of a pointer to the head node of a + * `Curl_addrinfo` list and it will be modified to point to the new head after + * shuffling. + */ +CURLcode Curl_shuffle_addr(struct Curl_easy *data, Curl_addrinfo **addr); + +/* + * 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, 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); + +/* + * Destroy the hostcache of this handle. + */ +void Curl_hostcache_destroy(struct Curl_easy *data); + +/* + * Populate the cache with specified entries from CURLOPT_RESOLVE. + */ +CURLcode Curl_loadhostpairs(struct Curl_easy *data); + +#endif /* HEADER_CURL_HOSTIP_H */ |