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 ARES_DATATYPE_URI_REPLY, /* struct ares_uri_reply */ 27 #if 0 28 ARES_DATATYPE_ADDR6TTL, /* struct ares_addrttl */ 29 ARES_DATATYPE_ADDRTTL, /* struct ares_addr6ttl */ 30 ARES_DATATYPE_HOSTENT, /* struct hostent */ 31 ARES_DATATYPE_OPTIONS, /* struct ares_options */ 32 #endif 33 ARES_DATATYPE_ADDR_PORT_NODE, /* struct ares_addr_port_node - introduced in 1.11.0 */ 34 ARES_DATATYPE_CAA_REPLY, /* struct ares_caa_reply - introduced in 1.17 */ 35 ARES_DATATYPE_LAST /* not used - introduced in 1.7.0 */ 36 } ares_datatype; 37 38 #define ARES_DATATYPE_MARK 0xbead 39 40 /* 41 * ares_data struct definition is internal to c-ares and shall not 42 * be exposed by the public API in order to allow future changes 43 * and extensions to it without breaking ABI. This will be used 44 * internally by c-ares as the container of multiple types of data 45 * dynamically allocated for which a reference will be returned 46 * to the calling application. 47 * 48 * c-ares API functions returning a pointer to c-ares internally 49 * allocated data will actually be returning an interior pointer 50 * into this ares_data struct. 51 * 52 * All this is 'invisible' to the calling application, the only 53 * requirement is that this kind of data must be free'ed by the 54 * calling application using ares_free_data() with the pointer 55 * it has received from a previous c-ares function call. 56 */ 57 58 struct ares_data { 59 ares_datatype type; /* Actual data type identifier. */ 60 unsigned int mark; /* Private ares_data signature. */ 61 union { 62 struct ares_txt_reply txt_reply; 63 struct ares_txt_ext txt_ext; 64 struct ares_srv_reply srv_reply; 65 struct ares_addr_node addr_node; 66 struct ares_addr_port_node addr_port_node; 67 struct ares_mx_reply mx_reply; 68 struct ares_naptr_reply naptr_reply; 69 struct ares_soa_reply soa_reply; 70 struct ares_caa_reply caa_reply; 71 struct ares_uri_reply uri_reply; 72 } data; 73 }; 74 75 void *ares_malloc_data(ares_datatype type); 76 77