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-rw-r--r--source3/nsswitch/README13
-rw-r--r--source3/nsswitch/wins.c129
2 files changed, 142 insertions, 0 deletions
diff --git a/source3/nsswitch/README b/source3/nsswitch/README
new file mode 100644
index 0000000000..9f0c581df6
--- /dev/null
+++ b/source3/nsswitch/README
@@ -0,0 +1,13 @@
+This extension provides a "wins" module for NSS on glibc2/Linux. This
+allows you to use a WINS entry in /etc/nsswitch.conf for hostname
+resolution, allowing you to resolve netbios names via start unix
+gethostbyname() calls. The end result is that you can use netbios
+names as host names in unix apps.
+
+1) run configure
+2) run "make nsswitch"
+3) cp nsswitch/libnss_wins.so /lib/libnss_wins.so.2
+4) add a wins entry to the hosts line in /etc/nsswitch.conf
+5) use it
+
+tridge@linuxcare.com
diff --git a/source3/nsswitch/wins.c b/source3/nsswitch/wins.c
new file mode 100644
index 0000000000..6c291bb1bf
--- /dev/null
+++ b/source3/nsswitch/wins.c
@@ -0,0 +1,129 @@
+/*
+ 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;
+}