1 /* $OpenBSD: getrrsetbyname.c,v 1.6 2015/09/14 07:38:37 guenther Exp $ */
2 /*
3 * Copyright (c) 2012 Eric Faurot <eric@openbsd.org>
4 *
5 * Permission to use, copy, modify, and distribute this software for any
6 * purpose with or without fee is hereby granted, provided that the above
7 * copyright notice and this permission notice appear in all copies.
8 *
9 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
10 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
11 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
12 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
13 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
14 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
15 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
16 */
17
18 #include <sys/types.h>
19 #include <sys/socket.h>
20 #include <netinet/in.h>
21 #include <netdb.h>
22
23 #include <asr.h>
24 #include <errno.h>
25 #include <resolv.h>
26 #include <stdlib.h>
27
28 int
getrrsetbyname(const char * name,unsigned int class,unsigned int type,unsigned int flags,struct rrsetinfo ** res)29 getrrsetbyname(const char *name, unsigned int class, unsigned int type,
30 unsigned int flags, struct rrsetinfo **res)
31 {
32 struct asr_query *as;
33 struct asr_result ar;
34 int r, saved_errno = errno;
35
36 res_init();
37
38 as = getrrsetbyname_async(name, class, type, flags, NULL);
39 if (as == NULL) {
40 r = (errno == ENOMEM) ? ERRSET_NOMEMORY : ERRSET_FAIL;
41 errno = saved_errno;
42 return (r);
43 }
44
45 asr_run_sync(as, &ar);
46
47 *res = ar.ar_rrsetinfo;
48
49 return (ar.ar_rrset_errno);
50 }
51
52 /* from net/getrrsetbyname.c */
53 void
freerrset(struct rrsetinfo * rrset)54 freerrset(struct rrsetinfo *rrset)
55 {
56 u_int16_t i;
57
58 if (rrset == NULL)
59 return;
60
61 if (rrset->rri_rdatas) {
62 for (i = 0; i < rrset->rri_nrdatas; i++) {
63 if (rrset->rri_rdatas[i].rdi_data == NULL)
64 break;
65 free(rrset->rri_rdatas[i].rdi_data);
66 }
67 free(rrset->rri_rdatas);
68 }
69
70 if (rrset->rri_sigs) {
71 for (i = 0; i < rrset->rri_nsigs; i++) {
72 if (rrset->rri_sigs[i].rdi_data == NULL)
73 break;
74 free(rrset->rri_sigs[i].rdi_data);
75 }
76 free(rrset->rri_sigs);
77 }
78
79 if (rrset->rri_name)
80 free(rrset->rri_name);
81 free(rrset);
82 }
83 DEF_WEAK(freerrset);
84