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/* Copyright (C) 2009-2010 by Daniel Stenberg
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*
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* Permission to use, copy, modify, and distribute this
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* software and its documentation for any purpose and without
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* fee is hereby granted, provided that the above copyright
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* notice appear in all copies and that both that copyright
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* notice and this permission notice appear in supporting
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* documentation, and that the name of M.I.T. not be used in
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* advertising or publicity pertaining to distribution of the
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* software without specific, written prior permission.
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* M.I.T. makes no representations about the suitability of
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* this software for any purpose. It is provided "as is"
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* without express or implied warranty.
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*/
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typedef enum {
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ARES_DATATYPE_UNKNOWN = 1, /* unknown data type - introduced in 1.7.0 */
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ARES_DATATYPE_SRV_REPLY, /* struct ares_srv_reply - introduced in 1.7.0 */
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ARES_DATATYPE_TXT_REPLY, /* struct ares_txt_reply - introduced in 1.7.0 */
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ARES_DATATYPE_ADDR_NODE, /* struct ares_addr_node - introduced in 1.7.1 */
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ARES_DATATYPE_MX_REPLY, /* struct ares_mx_reply - introduced in 1.7.2 */
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#if 0
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ARES_DATATYPE_ADDR6TTL, /* struct ares_addrttl */
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ARES_DATATYPE_ADDRTTL, /* struct ares_addr6ttl */
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ARES_DATATYPE_HOSTENT, /* struct hostent */
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ARES_DATATYPE_OPTIONS, /* struct ares_options */
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#endif
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ARES_DATATYPE_LAST /* not used - introduced in 1.7.0 */
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} ares_datatype;
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#define ARES_DATATYPE_MARK 0xbead
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/*
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* ares_data struct definition is internal to c-ares and shall not
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* be exposed by the public API in order to allow future changes
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* and extensions to it without breaking ABI. This will be used
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* internally by c-ares as the container of multiple types of data
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* dynamically allocated for which a reference will be returned
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* to the calling application.
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*
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* c-ares API functions returning a pointer to c-ares internally
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* allocated data will actually be returning an interior pointer
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* into this ares_data struct.
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*
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* All this is 'invisible' to the calling application, the only
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* requirement is that this kind of data must be free'ed by the
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* calling application using ares_free_data() with the pointer
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* it has received from a previous c-ares function call.
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*/
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struct ares_data {
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ares_datatype type; /* Actual data type identifier. */
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unsigned int mark; /* Private ares_data signature. */
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union {
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struct ares_txt_reply txt_reply;
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struct ares_srv_reply srv_reply;
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struct ares_addr_node addr_node;
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struct ares_mx_reply mx_reply;
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} data;
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};
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void *ares_malloc_data(ares_datatype type);
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ares_datatype ares_get_datatype(void * dataptr);
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