1 /* $OpenBSD: getnameinfo.c,v 1.1 2012/09/08 11:08:21 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 24 #include "asr.h" 25 26 int 27 getnameinfo(const struct sockaddr *sa, socklen_t salen, char *host, 28 size_t hostlen, char *serv, size_t servlen, int flags) 29 { 30 struct async *as; 31 struct async_res ar; 32 int saved_errno = errno; 33 34 as = getnameinfo_async(sa, salen, host, hostlen, serv, servlen, flags, 35 NULL); 36 if (as == NULL) { 37 if (errno == ENOMEM) { 38 errno = saved_errno; 39 return (EAI_MEMORY); 40 } 41 return (EAI_SYSTEM); 42 } 43 44 async_run_sync(as, &ar); 45 if (ar.ar_gai_errno == EAI_SYSTEM) 46 errno = ar.ar_errno; 47 48 return (ar.ar_gai_errno); 49 } 50