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/*
Unix SMB/Netbios implementation.
Version 2.0
a WINS nsswitch module
Copyright (C) Andrew Tridgell 1999
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
#define NO_SYSLOG
#include "includes.h"
#include <nss.h>
extern int DEBUGLEVEL;
#ifndef INADDRSZ
#define INADDRSZ 4
#endif
struct in_addr *lookup_backend(const char *name, int *count)
{
int fd;
static int initialised;
struct in_addr *ret;
char *p;
int j;
if (!initialised) {
initialised = 1;
DEBUGLEVEL = 0;
TimeInit();
setup_logging("nss_wins",True);
charset_initialise();
lp_load(CONFIGFILE,True,False,False);
load_interfaces();
}
*count = 0;
fd = open_socket_in(SOCK_DGRAM,0, 3, interpret_addr("0.0.0.0"), True);
if (fd == -1) return NULL;
set_socket_options(fd,"SO_BROADCAST");
p = lp_wins_server();
if (p && *p) {
ret = name_query(fd,name,0x20,False,True, *interpret_addr2(p), count,NULL);
goto out;
}
if (lp_wins_support()) {
/* we are our own WINS server */
ret = name_query(fd,name,0x20,False,True, *interpret_addr2("127.0.0.1"), count,NULL);
goto out;
}
/* uggh, we have to broadcast to each interface in turn */
for (j=iface_count() - 1;
j >= 0;
j--) {
struct in_addr *bcast = iface_n_bcast(j);
ret = name_query(fd,name,0x20,True,True,*bcast,count,NULL);
if (ret) break;
}
out:
close(fd);
return ret;
}
/****************************************************************************
gethostbyname() - we ignore any domain portion of the name and only
handle names that are at most 15 characters long
**************************************************************************/
enum nss_status
_nss_wins_gethostbyname_r(const char *name, struct hostent *he,
char *buffer, size_t buflen, int *errnop,
int *h_errnop)
{
char **host_addresses;
struct in_addr *ip_list;
int i, count;
ip_list = lookup_backend(name, &count);
if (!ip_list) {
return NSS_STATUS_NOTFOUND;
}
if (buflen < (2*count+1)*INADDRSZ) {
/* no ENOMEM error type?! */
return NSS_STATUS_NOTFOUND;
}
host_addresses = (char **)buffer;
he->h_addr_list = host_addresses;
host_addresses[count] = NULL;
buffer += (count + 1) * INADDRSZ;
buflen += (count + 1) * INADDRSZ;
he->h_addrtype = AF_INET;
he->h_length = INADDRSZ;
for (i=0;i<count;i++) {
memcpy(buffer, &ip_list[i].s_addr, INADDRSZ);
*host_addresses = buffer;
buffer += INADDRSZ;
buflen -= INADDRSZ;
host_addresses++;
}
if (ip_list) free(ip_list);
return NSS_STATUS_SUCCESS;
}
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