1 /* $OpenBSD: getrrsetbyname.c,v 1.3 2013/07/12 14:36:22 eric 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 <netinet/in.h> 20 21 #include <errno.h> 22 #include <resolv.h> 23 #include <stdlib.h> 24 25 #include "asr.h" 26 27 int 28 getrrsetbyname(const char *name, unsigned int class, unsigned int type, 29 unsigned int flags, struct rrsetinfo **res) 30 { 31 struct async *as; 32 struct async_res ar; 33 int r, saved_errno = errno; 34 35 res_init(); 36 37 as = getrrsetbyname_async(name, class, type, flags, NULL); 38 if (as == NULL) { 39 r = (errno == ENOMEM) ? ERRSET_NOMEMORY : ERRSET_FAIL; 40 errno = saved_errno; 41 return (r); 42 } 43 44 asr_async_run_sync(as, &ar); 45 46 *res = ar.ar_rrsetinfo; 47 48 return (ar.ar_rrset_errno); 49 } 50 51 /* from net/getrrsetbyname.c */ 52 void 53 freerrset(struct rrsetinfo *rrset) 54 { 55 u_int16_t i; 56 57 if (rrset == NULL) 58 return; 59 60 if (rrset->rri_rdatas) { 61 for (i = 0; i < rrset->rri_nrdatas; i++) { 62 if (rrset->rri_rdatas[i].rdi_data == NULL) 63 break; 64 free(rrset->rri_rdatas[i].rdi_data); 65 } 66 free(rrset->rri_rdatas); 67 } 68 69 if (rrset->rri_sigs) { 70 for (i = 0; i < rrset->rri_nsigs; i++) { 71 if (rrset->rri_sigs[i].rdi_data == NULL) 72 break; 73 free(rrset->rri_sigs[i].rdi_data); 74 } 75 free(rrset->rri_sigs); 76 } 77 78 if (rrset->rri_name) 79 free(rrset->rri_name); 80 free(rrset); 81 } 82