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/* $Id: ares_data.h,v 1.2 2009-11-23 12:03:33 yangtse Exp $ */
/* Copyright (C) 2009 by Daniel Stenberg
*
* Permission to use, copy, modify, and distribute this
* software and its documentation for any purpose and without
* fee is hereby granted, provided that the above copyright
* notice appear in all copies and that both that copyright
* notice and this permission notice appear in supporting
* documentation, and that the name of M.I.T. not be used in
* advertising or publicity pertaining to distribution of the
* software without specific, written prior permission.
* M.I.T. makes no representations about the suitability of
* this software for any purpose. It is provided "as is"
* without express or implied warranty.
*/
#ifndef HAVE_ARES_DATA
#include "resolv/ares/ares_parse_txt_reply.h"
#include "resolv/ares/ares_parse_srv_reply.h"
#endif /* HAVE_ARES_DATA */
typedef enum {
ARES_DATATYPE_UNKNOWN = 1, /* unknown data type - introduced in 1.7.0 */
ARES_DATATYPE_SRV_REPLY, /* struct ares_srv_reply - introduced in 1.7.0 */
ARES_DATATYPE_TXT_REPLY, /* struct ares_txt_reply - introduced in 1.7.0 */
#if 0
ARES_DATATYPE_ADDR6TTL, /* struct ares_addrttl */
ARES_DATATYPE_ADDRTTL, /* struct ares_addr6ttl */
ARES_DATATYPE_HOSTENT, /* struct hostent */
ARES_DATATYPE_OPTIONS, /* struct ares_options */
#endif
ARES_DATATYPE_LAST /* not used - introduced in 1.7.0 */
} ares_datatype;
#define ARES_DATATYPE_MARK 0xbead
/*
* ares_data struct definition is internal to c-ares and shall not
* be exposed by the public API in order to allow future changes
* and extensions to it without breaking ABI. This will be used
* internally by c-ares as the container of multiple types of data
* dynamically allocated for which a reference will be returned
* to the calling application.
*
* c-ares API functions returning a pointer to c-ares internally
* allocated data will actually be returning an interior pointer
* into this ares_data struct.
*
* All this is 'invisible' to the calling application, the only
* requirement is that this kind of data must be free'ed by the
* calling application using ares_free_data() with the pointer
* it has received from a previous c-ares function call.
*/
struct ares_data {
ares_datatype type; /* Actual data type identifier. */
unsigned int mark; /* Private ares_data signature. */
union {
struct ares_txt_reply txt_reply;
struct ares_srv_reply srv_reply;
} data;
};
void *_ares_malloc_data(ares_datatype type);
void _ares_free_data(void *dataptr);
ares_datatype ares_get_datatype(void * dataptr);
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