1 /* $OpenBSD: getnameinfo.c,v 1.5 2014/03/26 18:13:15 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 <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 27 int 28 getnameinfo(const struct sockaddr *sa, socklen_t salen, char *host, 29 size_t hostlen, char *serv, size_t servlen, int flags) 30 { 31 struct asr_query *as; 32 struct asr_result ar; 33 int saved_errno = errno; 34 35 res_init(); 36 37 as = getnameinfo_async(sa, salen, host, hostlen, serv, servlen, flags, 38 NULL); 39 if (as == NULL) { 40 if (errno == ENOMEM) { 41 errno = saved_errno; 42 return (EAI_MEMORY); 43 } 44 return (EAI_SYSTEM); 45 } 46 47 asr_run_sync(as, &ar); 48 if (ar.ar_gai_errno == EAI_SYSTEM) 49 errno = ar.ar_errno; 50 51 return (ar.ar_gai_errno); 52 } 53