70 lines
2.5 KiB
C
70 lines
2.5 KiB
C
/*
|
|
* Copyright (c) 1999 Kungliga Tekniska Högskolan
|
|
* (Royal Institute of Technology, Stockholm, Sweden).
|
|
* All rights reserved.
|
|
*
|
|
* Redistribution and use in source and binary forms, with or without
|
|
* modification, are permitted provided that the following conditions
|
|
* are met:
|
|
*
|
|
* 1. Redistributions of source code must retain the above copyright
|
|
* notice, this list of conditions and the following disclaimer.
|
|
*
|
|
* 2. Redistributions in binary form must reproduce the above copyright
|
|
* notice, this list of conditions and the following disclaimer in the
|
|
* documentation and/or other materials provided with the distribution.
|
|
*
|
|
* 3. Neither the name of the Institute nor the names of its contributors
|
|
* may be used to endorse or promote products derived from this software
|
|
* without specific prior written permission.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
|
|
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
|
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
|
|
* ARE DISCLAIMED. IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
|
|
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
|
|
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
|
|
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
|
|
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
|
|
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
|
|
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
|
|
* SUCH DAMAGE.
|
|
*/
|
|
|
|
#ifdef HAVE_CONFIG_H
|
|
#include <config.h>
|
|
RCSID("$Id: getnameinfo_verified.c,v 1.2 1999/12/05 10:52:09 assar Exp $");
|
|
#endif
|
|
|
|
#include "roken.h"
|
|
|
|
int
|
|
getnameinfo_verified(const struct sockaddr *sa, socklen_t salen,
|
|
char *host, size_t hostlen,
|
|
char *serv, size_t servlen,
|
|
int flags)
|
|
{
|
|
int ret;
|
|
struct addrinfo *ai, *a;
|
|
|
|
if (host == NULL)
|
|
return EAI_NONAME;
|
|
|
|
ret = getnameinfo (sa, salen, host, hostlen, serv, servlen, flags);
|
|
if (ret)
|
|
return ret;
|
|
ret = getaddrinfo (host, serv, NULL, &ai);
|
|
if (ret)
|
|
return ret;
|
|
for (a = ai; a != NULL; a = a->ai_next) {
|
|
if (a->ai_addrlen == salen
|
|
&& memcmp (a->ai_addr, sa, salen) == 0)
|
|
return 0;
|
|
}
|
|
if (flags & NI_NAMEREQD)
|
|
return EAI_NONAME;
|
|
ret = getnameinfo (sa, salen, host, hostlen, serv, servlen,
|
|
flags | NI_NUMERICSERV | NI_NUMERICHOST);
|
|
return ret;
|
|
}
|