128 lines
3.6 KiB
C
128 lines
3.6 KiB
C
/*
|
|
* Copyright (c) 1999 - 2001 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.c,v 1.4 2001/07/09 15:14:19 assar Exp $");
|
|
#endif
|
|
|
|
#include "roken.h"
|
|
|
|
static int
|
|
doit (int af,
|
|
const void *addr,
|
|
size_t addrlen,
|
|
int port,
|
|
char *host, size_t hostlen,
|
|
char *serv, size_t servlen,
|
|
int flags)
|
|
{
|
|
if (host != NULL) {
|
|
if (flags & NI_NUMERICHOST) {
|
|
if (inet_ntop (af, addr, host, hostlen) == NULL)
|
|
return EAI_SYSTEM;
|
|
} else {
|
|
struct hostent *he = gethostbyaddr (addr,
|
|
addrlen,
|
|
af);
|
|
if (he != NULL) {
|
|
strlcpy (host, hostent_find_fqdn(he), hostlen);
|
|
if (flags & NI_NOFQDN) {
|
|
char *dot = strchr (host, '.');
|
|
if (dot != NULL)
|
|
*dot = '\0';
|
|
}
|
|
} else if (flags & NI_NAMEREQD) {
|
|
return EAI_NONAME;
|
|
} else if (inet_ntop (af, addr, host, hostlen) == NULL)
|
|
return EAI_SYSTEM;
|
|
}
|
|
}
|
|
|
|
if (serv != NULL) {
|
|
if (flags & NI_NUMERICSERV) {
|
|
snprintf (serv, servlen, "%u", ntohs(port));
|
|
} else {
|
|
const char *proto = "tcp";
|
|
struct servent *se;
|
|
|
|
if (flags & NI_DGRAM)
|
|
proto = "udp";
|
|
|
|
se = getservbyport (port, proto);
|
|
if (se == NULL) {
|
|
snprintf (serv, servlen, "%u", ntohs(port));
|
|
} else {
|
|
strlcpy (serv, se->s_name, servlen);
|
|
}
|
|
}
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
*
|
|
*/
|
|
|
|
int
|
|
getnameinfo(const struct sockaddr *sa, socklen_t salen,
|
|
char *host, size_t hostlen,
|
|
char *serv, size_t servlen,
|
|
int flags)
|
|
{
|
|
switch (sa->sa_family) {
|
|
#ifdef HAVE_IPV6
|
|
case AF_INET6 : {
|
|
const struct sockaddr_in6 *sin6 = (const struct sockaddr_in6 *)sa;
|
|
|
|
return doit (AF_INET6, &sin6->sin6_addr, sizeof(sin6->sin6_addr),
|
|
sin6->sin6_port,
|
|
host, hostlen,
|
|
serv, servlen,
|
|
flags);
|
|
}
|
|
#endif
|
|
case AF_INET : {
|
|
const struct sockaddr_in *sin = (const struct sockaddr_in *)sa;
|
|
|
|
return doit (AF_INET, &sin->sin_addr, sizeof(sin->sin_addr),
|
|
sin->sin_port,
|
|
host, hostlen,
|
|
serv, servlen,
|
|
flags);
|
|
}
|
|
default :
|
|
return EAI_FAMILY;
|
|
}
|
|
}
|