1 2 /* Copyright (C) 2009-2013 by Daniel Stenberg 3 * 4 * Permission to use, copy, modify, and distribute this 5 * software and its documentation for any purpose and without 6 * fee is hereby granted, provided that the above copyright 7 * notice appear in all copies and that both that copyright 8 * notice and this permission notice appear in supporting 9 * documentation, and that the name of M.I.T. not be used in 10 * advertising or publicity pertaining to distribution of the 11 * software without specific, written prior permission. 12 * M.I.T. makes no representations about the suitability of 13 * this software for any purpose. It is provided "as is" 14 * without express or implied warranty. 15 */ 16 17 typedef enum { 18 ARES_DATATYPE_UNKNOWN = 1, /* unknown data type - introduced in 1.7.0 */ 19 ARES_DATATYPE_SRV_REPLY, /* struct ares_srv_reply - introduced in 1.7.0 */ 20 ARES_DATATYPE_TXT_REPLY, /* struct ares_txt_reply - introduced in 1.7.0 */ 21 ARES_DATATYPE_TXT_EXT, /* struct ares_txt_ext - introduced in 1.11.0 */ 22 ARES_DATATYPE_ADDR_NODE, /* struct ares_addr_node - introduced in 1.7.1 */ 23 ARES_DATATYPE_MX_REPLY, /* struct ares_mx_reply - introduced in 1.7.2 */ 24 ARES_DATATYPE_NAPTR_REPLY,/* struct ares_naptr_reply - introduced in 1.7.6 */ 25 ARES_DATATYPE_SOA_REPLY, /* struct ares_soa_reply - introduced in 1.9.0 */ 26 #if 0 27 ARES_DATATYPE_ADDR6TTL, /* struct ares_addrttl */ 28 ARES_DATATYPE_ADDRTTL, /* struct ares_addr6ttl */ 29 ARES_DATATYPE_HOSTENT, /* struct hostent */ 30 ARES_DATATYPE_OPTIONS, /* struct ares_options */ 31 #endif 32 ARES_DATATYPE_ADDR_PORT_NODE, /* struct ares_addr_port_node - introduced in 1.11.0 */ 33 ARES_DATATYPE_LAST /* not used - introduced in 1.7.0 */ 34 } ares_datatype; 35 36 #define ARES_DATATYPE_MARK 0xbead 37 38 /* 39 * ares_data struct definition is internal to c-ares and shall not 40 * be exposed by the public API in order to allow future changes 41 * and extensions to it without breaking ABI. This will be used 42 * internally by c-ares as the container of multiple types of data 43 * dynamically allocated for which a reference will be returned 44 * to the calling application. 45 * 46 * c-ares API functions returning a pointer to c-ares internally 47 * allocated data will actually be returning an interior pointer 48 * into this ares_data struct. 49 * 50 * All this is 'invisible' to the calling application, the only 51 * requirement is that this kind of data must be free'ed by the 52 * calling application using ares_free_data() with the pointer 53 * it has received from a previous c-ares function call. 54 */ 55 56 struct ares_data { 57 ares_datatype type; /* Actual data type identifier. */ 58 unsigned int mark; /* Private ares_data signature. */ 59 union { 60 struct ares_txt_reply txt_reply; 61 struct ares_txt_ext txt_ext; 62 struct ares_srv_reply srv_reply; 63 struct ares_addr_node addr_node; 64 struct ares_addr_port_node addr_port_node; 65 struct ares_mx_reply mx_reply; 66 struct ares_naptr_reply naptr_reply; 67 struct ares_soa_reply soa_reply; 68 } data; 69 }; 70 71 void *ares_malloc_data(ares_datatype type); 72 73