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-rw-r--r--source4/nsswitch/wins.c322
1 files changed, 322 insertions, 0 deletions
diff --git a/source4/nsswitch/wins.c b/source4/nsswitch/wins.c
new file mode 100644
index 0000000000..187748d285
--- /dev/null
+++ b/source4/nsswitch/wins.c
@@ -0,0 +1,322 @@
+/*
+ Unix SMB/CIFS implementation.
+ 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.
+
+*/
+
+#include "includes.h"
+#ifdef HAVE_NS_API_H
+#undef VOLATILE
+
+#include <ns_daemon.h>
+#endif
+
+#ifndef INADDRSZ
+#define INADDRSZ 4
+#endif
+
+static int initialised;
+
+extern BOOL AllowDebugChange;
+
+/* Use our own create socket code so we don't recurse.... */
+
+static int wins_lookup_open_socket_in(void)
+{
+ struct sockaddr_in sock;
+ int val=1;
+ int res;
+
+ memset((char *)&sock,'\0',sizeof(sock));
+
+#ifdef HAVE_SOCK_SIN_LEN
+ sock.sin_len = sizeof(sock);
+#endif
+ sock.sin_port = 0;
+ sock.sin_family = AF_INET;
+ sock.sin_addr.s_addr = interpret_addr("0.0.0.0");
+ res = socket(AF_INET, SOCK_DGRAM, 0);
+ if (res == -1)
+ return -1;
+
+ setsockopt(res,SOL_SOCKET,SO_REUSEADDR,(char *)&val,sizeof(val));
+#ifdef SO_REUSEPORT
+ setsockopt(res,SOL_SOCKET,SO_REUSEPORT,(char *)&val,sizeof(val));
+#endif /* SO_REUSEPORT */
+
+ /* now we've got a socket - we need to bind it */
+
+ if (bind(res, (struct sockaddr * ) &sock,sizeof(sock)) < 0) {
+ close(res);
+ return(-1);
+ }
+
+ set_socket_options(res,"SO_BROADCAST");
+
+ return res;
+}
+
+
+static void nss_wins_init(void)
+{
+ initialised = 1;
+ DEBUGLEVEL = 0;
+ AllowDebugChange = False;
+
+ TimeInit();
+ setup_logging("nss_wins",False);
+ lp_load(dyn_CONFIGFILE,True,False,False);
+ load_interfaces();
+}
+
+static struct node_status *lookup_byaddr_backend(char *addr, int *count)
+{
+ int fd;
+ struct in_addr ip;
+ struct nmb_name nname;
+ struct node_status *status;
+
+ if (!initialised) {
+ nss_wins_init();
+ }
+
+ fd = wins_lookup_open_socket_in();
+ if (fd == -1)
+ return NULL;
+
+ make_nmb_name(&nname, "*", 0);
+ ip = *interpret_addr2(addr);
+ status = node_status_query(fd,&nname,ip, count);
+
+ close(fd);
+ return status;
+}
+
+static struct in_addr *lookup_byname_backend(const char *name, int *count)
+{
+ int fd = -1;
+ struct in_addr *ret = NULL;
+ struct in_addr p;
+ int j, flags = 0;
+
+ if (!initialised) {
+ nss_wins_init();
+ }
+
+ *count = 0;
+
+ /* always try with wins first */
+ if (resolve_wins(name,0x20,&ret,count)) {
+ return ret;
+ }
+
+ fd = wins_lookup_open_socket_in();
+ if (fd == -1) {
+ return NULL;
+ }
+
+ /* 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, &flags, NULL);
+ if (ret) break;
+ }
+
+out:
+ close(fd);
+ return ret;
+}
+
+
+#ifdef HAVE_NS_API_H
+/* IRIX version */
+
+int init(void)
+{
+ nsd_logprintf(NSD_LOG_MIN, "entering init (wins)\n");
+ nss_wins_init();
+ return NSD_OK;
+}
+
+int lookup(nsd_file_t *rq)
+{
+ char *map;
+ char *key;
+ char *addr;
+ struct in_addr *ip_list;
+ struct node_status *status;
+ int i, count, len, size;
+ char response[1024];
+ BOOL found = False;
+
+ nsd_logprintf(NSD_LOG_MIN, "entering lookup (wins)\n");
+ if (! rq)
+ return NSD_ERROR;
+
+ map = nsd_attr_fetch_string(rq->f_attrs, "table", (char*)0);
+ if (! map) {
+ rq->f_status = NS_FATAL;
+ return NSD_ERROR;
+ }
+
+ key = nsd_attr_fetch_string(rq->f_attrs, "key", (char*)0);
+ if (! key || ! *key) {
+ rq->f_status = NS_FATAL;
+ return NSD_ERROR;
+ }
+
+ response[0] = '\0';
+ len = sizeof(response) - 2;
+
+ /*
+ * response needs to be a string of the following format
+ * ip_address[ ip_address]*\tname[ alias]*
+ */
+ if (strcasecmp(map,"hosts.byaddr") == 0) {
+ if ( status = lookup_byaddr_backend(key, &count)) {
+ size = strlen(key) + 1;
+ if (size > len) {
+ free(status);
+ return NSD_ERROR;
+ }
+ len -= size;
+ strncat(response,key,size);
+ strncat(response,"\t",1);
+ for (i = 0; i < count; i++) {
+ /* ignore group names */
+ if (status[i].flags & 0x80) continue;
+ if (status[i].type == 0x20) {
+ size = sizeof(status[i].name) + 1;
+ if (size > len) {
+ free(status);
+ return NSD_ERROR;
+ }
+ len -= size;
+ strncat(response, status[i].name, size);
+ strncat(response, " ", 1);
+ found = True;
+ }
+ }
+ response[strlen(response)-1] = '\n';
+ free(status);
+ }
+ } else if (strcasecmp(map,"hosts.byname") == 0) {
+ if (ip_list = lookup_byname_backend(key, &count)) {
+ for (i = count; i ; i--) {
+ addr = inet_ntoa(ip_list[i-1]);
+ size = strlen(addr) + 1;
+ if (size > len) {
+ free(ip_list);
+ return NSD_ERROR;
+ }
+ len -= size;
+ if (i != 0)
+ response[strlen(response)-1] = ' ';
+ strncat(response,addr,size);
+ strncat(response,"\t",1);
+ }
+ size = strlen(key) + 1;
+ if (size > len) {
+ free(ip_list);
+ return NSD_ERROR;
+ }
+ strncat(response,key,size);
+ strncat(response,"\n",1);
+ found = True;
+ free(ip_list);
+ }
+ }
+
+ if (found) {
+ nsd_logprintf(NSD_LOG_LOW, "lookup (wins %s) %s\n",map,response);
+ nsd_set_result(rq,NS_SUCCESS,response,strlen(response),VOLATILE);
+ return NSD_OK;
+ }
+ nsd_logprintf(NSD_LOG_LOW, "lookup (wins) not found\n");
+ rq->f_status = NS_NOTFOUND;
+ return NSD_NEXT;
+}
+
+#else
+/****************************************************************************
+gethostbyname() - we ignore any domain portion of the name and only
+handle names that are at most 15 characters long
+ **************************************************************************/
+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;
+ size_t namelen = strlen(name) + 1;
+
+ memset(he, '\0', sizeof(*he));
+
+ ip_list = lookup_byname_backend(name, &count);
+ if (!ip_list) {
+ return NSS_STATUS_NOTFOUND;
+ }
+
+ if (buflen < namelen + (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);
+
+ memcpy(buffer, name, namelen);
+ he->h_name = buffer;
+
+ return NSS_STATUS_SUCCESS;
+}
+
+
+NSS_STATUS
+_nss_wins_gethostbyname2_r(const char *name, int af, struct hostent *he,
+ char *buffer, size_t buflen, int *errnop,
+ int *h_errnop)
+{
+ if(af!=AF_INET) {
+ *h_errnop = NO_DATA;
+ *errnop = EAFNOSUPPORT;
+ return NSS_STATUS_UNAVAIL;
+ }
+
+ return _nss_wins_gethostbyname_r(name,he,buffer,buflen,errnop,h_errnop);
+}
+#endif
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