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/* $OpenBSD: getnameinfo.c,v 1.4 2014/03/25 19:48:11 eric Exp $ */
/*
* Copyright (c) 2012 Eric Faurot <eric@openbsd.org>
*
* Permission to use, copy, modify, and distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
#include <sys/types.h>
#include <netinet/in.h>
#include <errno.h>
#include <resolv.h>
#include "asr.h"
int
getnameinfo(const struct sockaddr *sa, socklen_t salen, char *host,
size_t hostlen, char *serv, size_t servlen, int flags)
{
struct asr_query *as;
struct asr_result ar;
int saved_errno = errno;
res_init();
as = getnameinfo_async(sa, salen, host, hostlen, serv, servlen, flags,
NULL);
if (as == NULL) {
if (errno == ENOMEM) {
errno = saved_errno;
return (EAI_MEMORY);
}
return (EAI_SYSTEM);
}
asr_run_sync(as, &ar);
if (ar.ar_gai_errno == EAI_SYSTEM)
errno = ar.ar_errno;
return (ar.ar_gai_errno);
}
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