1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
|
/* Copyright (C) 2009-2013 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.
*/
#include "ares_setup.h"
#include <stddef.h>
#include "ares.h"
#include "ares_data.h"
#include "ares_private.h"
/*
** ares_free_data() - c-ares external API function.
**
** This function must be used by the application to free data memory that
** has been internally allocated by some c-ares function and for which a
** pointer has already been returned to the calling application. The list
** of c-ares functions returning pointers that must be free'ed using this
** function is:
**
** ares_get_servers()
** ares_parse_srv_reply()
** ares_parse_txt_reply()
*/
void ares_free_data(void *dataptr)
{
struct ares_data *ptr;
if (!dataptr)
return;
#ifdef __INTEL_COMPILER
# pragma warning(push)
# pragma warning(disable:1684)
/* 1684: conversion from pointer to same-sized integral type */
#endif
ptr = (void *)((char *)dataptr - offsetof(struct ares_data, data));
#ifdef __INTEL_COMPILER
# pragma warning(pop)
#endif
if (ptr->mark != ARES_DATATYPE_MARK)
return;
switch (ptr->type)
{
case ARES_DATATYPE_MX_REPLY:
if (ptr->data.mx_reply.next)
ares_free_data(ptr->data.mx_reply.next);
if (ptr->data.mx_reply.host)
ares_free(ptr->data.mx_reply.host);
break;
case ARES_DATATYPE_SRV_REPLY:
if (ptr->data.srv_reply.next)
ares_free_data(ptr->data.srv_reply.next);
if (ptr->data.srv_reply.host)
ares_free(ptr->data.srv_reply.host);
break;
case ARES_DATATYPE_TXT_REPLY:
case ARES_DATATYPE_TXT_EXT:
if (ptr->data.txt_reply.next)
ares_free_data(ptr->data.txt_reply.next);
if (ptr->data.txt_reply.txt)
ares_free(ptr->data.txt_reply.txt);
break;
case ARES_DATATYPE_ADDR_NODE:
if (ptr->data.addr_node.next)
ares_free_data(ptr->data.addr_node.next);
break;
case ARES_DATATYPE_ADDR_PORT_NODE:
if (ptr->data.addr_port_node.next)
ares_free_data(ptr->data.addr_port_node.next);
break;
case ARES_DATATYPE_NAPTR_REPLY:
if (ptr->data.naptr_reply.next)
ares_free_data(ptr->data.naptr_reply.next);
if (ptr->data.naptr_reply.flags)
ares_free(ptr->data.naptr_reply.flags);
if (ptr->data.naptr_reply.service)
ares_free(ptr->data.naptr_reply.service);
if (ptr->data.naptr_reply.regexp)
ares_free(ptr->data.naptr_reply.regexp);
if (ptr->data.naptr_reply.replacement)
ares_free(ptr->data.naptr_reply.replacement);
break;
case ARES_DATATYPE_SOA_REPLY:
if (ptr->data.soa_reply.nsname)
ares_free(ptr->data.soa_reply.nsname);
if (ptr->data.soa_reply.hostmaster)
ares_free(ptr->data.soa_reply.hostmaster);
break;
default:
return;
}
ares_free(ptr);
}
/*
** ares_malloc_data() - c-ares internal helper function.
**
** This function allocates memory for a c-ares private ares_data struct
** for the specified ares_datatype, initializes c-ares private fields
** and zero initializes those which later might be used from the public
** API. It returns an interior pointer which can be passed by c-ares
** functions to the calling application, and that must be free'ed using
** c-ares external API function ares_free_data().
*/
void *ares_malloc_data(ares_datatype type)
{
struct ares_data *ptr;
ptr = ares_malloc(sizeof(struct ares_data));
if (!ptr)
return NULL;
switch (type)
{
case ARES_DATATYPE_MX_REPLY:
ptr->data.mx_reply.next = NULL;
ptr->data.mx_reply.host = NULL;
ptr->data.mx_reply.priority = 0;
break;
case ARES_DATATYPE_SRV_REPLY:
ptr->data.srv_reply.next = NULL;
ptr->data.srv_reply.host = NULL;
ptr->data.srv_reply.priority = 0;
ptr->data.srv_reply.weight = 0;
ptr->data.srv_reply.port = 0;
break;
case ARES_DATATYPE_TXT_EXT:
ptr->data.txt_ext.record_start = 0;
/* FALLTHROUGH */
case ARES_DATATYPE_TXT_REPLY:
ptr->data.txt_reply.next = NULL;
ptr->data.txt_reply.txt = NULL;
ptr->data.txt_reply.length = 0;
break;
case ARES_DATATYPE_ADDR_NODE:
ptr->data.addr_node.next = NULL;
ptr->data.addr_node.family = 0;
memset(&ptr->data.addr_node.addrV6, 0,
sizeof(ptr->data.addr_node.addrV6));
break;
case ARES_DATATYPE_ADDR_PORT_NODE:
ptr->data.addr_port_node.next = NULL;
ptr->data.addr_port_node.family = 0;
ptr->data.addr_port_node.udp_port = 0;
ptr->data.addr_port_node.tcp_port = 0;
memset(&ptr->data.addr_port_node.addrV6, 0,
sizeof(ptr->data.addr_port_node.addrV6));
break;
case ARES_DATATYPE_NAPTR_REPLY:
ptr->data.naptr_reply.next = NULL;
ptr->data.naptr_reply.flags = NULL;
ptr->data.naptr_reply.service = NULL;
ptr->data.naptr_reply.regexp = NULL;
ptr->data.naptr_reply.replacement = NULL;
ptr->data.naptr_reply.order = 0;
ptr->data.naptr_reply.preference = 0;
break;
case ARES_DATATYPE_SOA_REPLY:
ptr->data.soa_reply.nsname = NULL;
ptr->data.soa_reply.hostmaster = NULL;
ptr->data.soa_reply.serial = 0;
ptr->data.soa_reply.refresh = 0;
ptr->data.soa_reply.retry = 0;
ptr->data.soa_reply.expire = 0;
ptr->data.soa_reply.minttl = 0;
break;
default:
ares_free(ptr);
return NULL;
}
ptr->mark = ARES_DATATYPE_MARK;
ptr->type = type;
return &ptr->data;
}
|
