356 lines
8.1 KiB
C
356 lines
8.1 KiB
C
/* The Inner Net License, Version 2.00
|
|
|
|
The author(s) grant permission for redistribution and use in source and
|
|
binary forms, with or without modification, of the software and documentation
|
|
provided that the following conditions are met:
|
|
|
|
0. If you receive a version of the software that is specifically labelled
|
|
as not being for redistribution (check the version message and/or README),
|
|
you are not permitted to redistribute that version of the software in any
|
|
way or form.
|
|
1. All terms of the all other applicable copyrights and licenses must be
|
|
followed.
|
|
2. Redistributions of source code must retain the authors' copyright
|
|
notice(s), this list of conditions, and the following disclaimer.
|
|
3. Redistributions in binary form must reproduce the authors' copyright
|
|
notice(s), this list of conditions, and the following disclaimer in the
|
|
documentation and/or other materials provided with the distribution.
|
|
4. All advertising materials mentioning features or use of this software
|
|
must display the following acknowledgement with the name(s) of the
|
|
authors as specified in the copyright notice(s) substituted where
|
|
indicated:
|
|
|
|
This product includes software developed by <name(s)>, The Inner
|
|
Net, and other contributors.
|
|
|
|
5. Neither the name(s) of the author(s) 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 ITS AUTHORS 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 AUTHORS 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.
|
|
|
|
If these license terms cause you a real problem, contact the author. */
|
|
|
|
/* This software is Copyright 1996 by Craig Metz, All Rights Reserved. */
|
|
|
|
#include <sys/types.h>
|
|
#include <sys/socket.h>
|
|
|
|
#include <netinet/in.h>
|
|
#include <sys/un.h>
|
|
#include <sys/utsname.h>
|
|
#include <netdb.h>
|
|
#include <errno.h>
|
|
#include <string.h>
|
|
#include <stdio.h>
|
|
#include <unistd.h>
|
|
#include <alloca.h>
|
|
#include <bits/libc-lock.h>
|
|
#include <arpa/inet.h>
|
|
|
|
#ifndef min
|
|
# define min(x,y) (((x) > (y)) ? (y) : (x))
|
|
#endif /* min */
|
|
|
|
|
|
static char *
|
|
internal_function
|
|
nrl_domainname (void)
|
|
{
|
|
static char *domain = NULL;
|
|
static int first = 1;
|
|
|
|
if (first)
|
|
{
|
|
__libc_lock_define_initialized (static, lock);
|
|
__libc_lock_lock (lock);
|
|
|
|
if (first)
|
|
{
|
|
char *c;
|
|
struct hostent *h, th;
|
|
size_t tmpbuflen = 1024;
|
|
char *tmpbuf = alloca (tmpbuflen);
|
|
int herror;
|
|
|
|
first = 0;
|
|
|
|
while (__gethostbyname_r ("localhost", &th, tmpbuf, tmpbuflen, &h,
|
|
&herror))
|
|
{
|
|
if (herror == NETDB_INTERNAL && errno == ERANGE)
|
|
{
|
|
tmpbuflen *= 2;
|
|
tmpbuf = alloca (tmpbuflen);
|
|
}
|
|
else
|
|
break;
|
|
}
|
|
|
|
if (h && (c = strchr (h->h_name, '.')))
|
|
domain = __strdup (++c);
|
|
else
|
|
{
|
|
/* The name contains no domain information. Use the name
|
|
now to get more information. */
|
|
while (gethostname (tmpbuf, tmpbuflen))
|
|
{
|
|
tmpbuflen *= 2;
|
|
tmpbuf = alloca (tmpbuflen);
|
|
}
|
|
|
|
if ((c = strchr (tmpbuf, '.')))
|
|
domain = __strdup (++c);
|
|
else
|
|
{
|
|
/* We need to preserve the hostname. */
|
|
const char *hstname = strdupa (tmpbuf);
|
|
|
|
while (__gethostbyname_r (hstname, &th, tmpbuf, tmpbuflen,
|
|
&h, &herror))
|
|
{
|
|
if (herror == NETDB_INTERNAL && errno == ERANGE)
|
|
{
|
|
tmpbuflen *= 2;
|
|
tmpbuf = alloca (tmpbuflen);
|
|
}
|
|
else
|
|
break;
|
|
}
|
|
|
|
if (h && (c = strchr(h->h_name, '.')))
|
|
domain = __strdup (++c);
|
|
else
|
|
{
|
|
struct in_addr in_addr;
|
|
|
|
in_addr.s_addr = htonl (0x7f000001);
|
|
|
|
while (__gethostbyaddr_r ((const char *) &in_addr,
|
|
sizeof (struct in_addr),
|
|
AF_INET, &th, tmpbuf,
|
|
tmpbuflen, &h, &herror))
|
|
{
|
|
if (herror == NETDB_INTERNAL && errno == ERANGE)
|
|
{
|
|
tmpbuflen *= 2;
|
|
tmpbuf = alloca (tmpbuflen);
|
|
}
|
|
else
|
|
break;
|
|
}
|
|
|
|
if (h && (c = strchr (h->h_name, '.')))
|
|
domain = __strdup (++c);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
__libc_lock_unlock (lock);
|
|
}
|
|
|
|
return domain;
|
|
};
|
|
|
|
|
|
int
|
|
getnameinfo (const struct sockaddr *sa, socklen_t addrlen, char *host,
|
|
size_t hostlen, char *serv, size_t servlen, int flags)
|
|
{
|
|
int serrno = errno;
|
|
int tmpbuflen = 1024;
|
|
int herrno;
|
|
char *tmpbuf = alloca (tmpbuflen);
|
|
struct hostent th;
|
|
|
|
if (sa == NULL)
|
|
return -1;
|
|
|
|
if (host != NULL && hostlen > 0)
|
|
switch(sa->sa_family)
|
|
{
|
|
case AF_INET:
|
|
case AF_INET6:
|
|
if (!(flags & NI_NUMERICHOST))
|
|
{
|
|
struct hostent *h = NULL;
|
|
if (h == NULL)
|
|
{
|
|
if (sa->sa_family == AF_INET6)
|
|
{
|
|
while (__gethostbyaddr_r ((void *) &(((struct sockaddr_in6 *) sa)->sin6_addr),
|
|
sizeof(struct in6_addr),
|
|
AF_INET6, &th, tmpbuf, tmpbuflen,
|
|
&h, &herrno))
|
|
{
|
|
if (herrno == NETDB_INTERNAL)
|
|
{
|
|
if (errno == ERANGE)
|
|
{
|
|
tmpbuflen *= 2;
|
|
tmpbuf = alloca (tmpbuflen);
|
|
}
|
|
else
|
|
{
|
|
__set_h_errno (herrno);
|
|
__set_errno (serrno);
|
|
return -1;
|
|
}
|
|
}
|
|
else
|
|
{
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
else
|
|
{
|
|
while (__gethostbyaddr_r ((void *) &(((struct sockaddr_in *)sa)->sin_addr),
|
|
sizeof(struct in_addr), AF_INET,
|
|
&th, tmpbuf, tmpbuflen,
|
|
&h, &herrno))
|
|
{
|
|
if (errno == ERANGE)
|
|
{
|
|
tmpbuflen *= 2;
|
|
tmpbuf = alloca (tmpbuflen);
|
|
}
|
|
else
|
|
{
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
if (h)
|
|
{
|
|
if (flags & NI_NOFQDN)
|
|
{
|
|
char *c;
|
|
if ((c = nrl_domainname ()) && (c = strstr(h->h_name, c))
|
|
&& (c != h->h_name) && (*(--c) == '.'))
|
|
{
|
|
strncpy (host, h->h_name,
|
|
min(hostlen, (size_t) (c - h->h_name)));
|
|
break;
|
|
}
|
|
}
|
|
strncpy (host, h->h_name, hostlen);
|
|
break;
|
|
}
|
|
}
|
|
|
|
if (flags & NI_NAMEREQD)
|
|
{
|
|
__set_errno (serrno);
|
|
return -1;
|
|
}
|
|
else
|
|
{
|
|
const char *c;
|
|
if (sa->sa_family == AF_INET6)
|
|
c = inet_ntop (AF_INET6,
|
|
(void *) &(((struct sockaddr_in6 *) sa)->sin6_addr),
|
|
host, hostlen);
|
|
else
|
|
c = inet_ntop (AF_INET,
|
|
(void *) &(((struct sockaddr_in *) sa)->sin_addr),
|
|
host, hostlen);
|
|
|
|
if (c == NULL)
|
|
{
|
|
__set_errno (serrno);
|
|
return -1;
|
|
}
|
|
}
|
|
break;
|
|
|
|
case AF_LOCAL:
|
|
if (!(flags & NI_NUMERICHOST))
|
|
{
|
|
struct utsname utsname;
|
|
|
|
if (!uname (&utsname))
|
|
{
|
|
strncpy (host, utsname.nodename, hostlen);
|
|
break;
|
|
};
|
|
};
|
|
|
|
if (flags & NI_NAMEREQD)
|
|
{
|
|
__set_errno (serrno);
|
|
return -1;
|
|
}
|
|
|
|
strncpy (host, "localhost", hostlen);
|
|
break;
|
|
|
|
default:
|
|
return -1;
|
|
}
|
|
|
|
if (serv && (servlen > 0))
|
|
switch(sa->sa_family)
|
|
{
|
|
case AF_INET:
|
|
case AF_INET6:
|
|
if (!(flags & NI_NUMERICSERV))
|
|
{
|
|
struct servent *s, ts;
|
|
while (__getservbyport_r (((struct sockaddr_in *) sa)->sin_port,
|
|
((flags & NI_DGRAM) ? "udp" : "tcp"),
|
|
&ts, tmpbuf, tmpbuflen, &s))
|
|
{
|
|
if (herrno == NETDB_INTERNAL)
|
|
{
|
|
if (errno == ERANGE)
|
|
{
|
|
tmpbuflen *= 2;
|
|
tmpbuf = __alloca (tmpbuflen);
|
|
}
|
|
else
|
|
{
|
|
__set_errno (serrno);
|
|
return -1;
|
|
}
|
|
}
|
|
else
|
|
{
|
|
break;
|
|
}
|
|
}
|
|
if (s)
|
|
{
|
|
strncpy (serv, s->s_name, servlen);
|
|
break;
|
|
}
|
|
}
|
|
snprintf (serv, servlen, "%d",
|
|
ntohs (((struct sockaddr_in *) sa)->sin_port));
|
|
break;
|
|
|
|
case AF_LOCAL:
|
|
strncpy (serv, ((struct sockaddr_un *) sa)->sun_path, servlen);
|
|
break;
|
|
}
|
|
|
|
if (host && (hostlen > 0))
|
|
host[hostlen-1] = 0;
|
|
if (serv && (servlen > 0))
|
|
serv[servlen-1] = 0;
|
|
errno = serrno;
|
|
return 0;
|
|
}
|