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 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 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