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-rw-r--r--nsswitch/wins.c400
1 files changed, 400 insertions, 0 deletions
diff --git a/nsswitch/wins.c b/nsswitch/wins.c
new file mode 100644
index 0000000..a310477
--- /dev/null
+++ b/nsswitch/wins.c
@@ -0,0 +1,400 @@
+/*
+ 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 3 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, see <http://www.gnu.org/licenses/>.
+
+*/
+
+#include "includes.h"
+#include "nsswitch/winbind_client.h"
+#include "nsswitch/libwbclient/wbclient.h"
+#include "lib/util/string_wrappers.h"
+
+#ifdef HAVE_NS_API_H
+
+#include <ns_daemon.h>
+#endif
+
+#ifdef HAVE_PTHREAD_H
+#include <pthread.h>
+#endif
+
+#ifdef HAVE_PTHREAD
+static pthread_mutex_t wins_nss_mutex = PTHREAD_MUTEX_INITIALIZER;
+#endif
+
+#ifndef INADDRSZ
+#define INADDRSZ 4
+#endif
+
+#ifndef NETDB_INTERNAL
+#define NETDB_INTERNAL -1
+#endif
+
+#ifndef NETDB_SUCCESS
+#define NETDB_SUCCESS 0
+#endif
+
+_PUBLIC_ON_LINUX_
+NSS_STATUS _nss_wins_gethostbyname_r(const char *hostname,
+ struct hostent *he,
+ char *buffer,
+ size_t buflen,
+ int *errnop,
+ int *h_errnop);
+NSS_STATUS _nss_wins_gethostbyname2_r(const char *name,
+ int af,
+ struct hostent *he,
+ char *buffer,
+ size_t buflen,
+ int *errnop,
+ int *h_errnop);
+
+static char *lookup_byname_backend(const char *name)
+{
+ const char *p;
+ char *ip, *ipp;
+ size_t nbt_len;
+ wbcErr result;
+
+ nbt_len = strlen(name);
+ if (nbt_len > MAX_NETBIOSNAME_LEN - 1) {
+ return NULL;
+ }
+ p = strchr(name, '.');
+ if (p != NULL) {
+ return NULL;
+ }
+
+ wbcSetClientProcessName("nss_wins");
+ result = wbcResolveWinsByName(name, &ip);
+ if (result != WBC_ERR_SUCCESS) {
+ return NULL;
+ }
+
+ ipp = strchr(ip, '\t');
+ if (ipp != NULL) {
+ *ipp = '\0';
+ }
+
+ return ip;
+}
+
+#ifdef HAVE_NS_API_H
+
+static char *lookup_byaddr_backend(const char *ip)
+{
+ wbcErr result;
+ char *name = NULL;
+
+ wbcSetClientProcessName("nss_wins");
+ result = wbcResolveWinsByIP(ip, &name);
+ if (result != WBC_ERR_SUCCESS) {
+ return NULL;
+ }
+
+ return name;
+}
+
+/* IRIX version */
+
+int init(void)
+{
+ bool ok;
+
+ nsd_logprintf(NSD_LOG_MIN, "entering init (wins)\n");
+
+ ok = nss_wins_init();
+ if (!ok) {
+ return NSD_ERROR;
+ }
+
+ return NSD_OK;
+}
+
+int lookup(nsd_file_t *rq)
+{
+ char *map;
+ char *key;
+ char *addr;
+ 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_m(map,"hosts.byaddr") == 0) {
+ char *name;
+
+ name = lookup_byaddr_backend(key);
+ if (name != NULL) {
+ size = strlen(key) + 1;
+ if (size > len) {
+ return NSD_ERROR;
+ }
+ len -= size;
+ strncat(response,key,size);
+ strncat(response,"\t",1);
+
+ size = strlen(name) + 1;
+ if (size > len) {
+ return NSD_ERROR;
+ }
+ len -= size;
+ strncat(response, name, size);
+ strncat(response, " ", 1);
+ found = True;
+ }
+ response[strlen(response)-1] = '\n';
+ } else if (strcasecmp_m(map,"hosts.byname") == 0) {
+ char *ip;
+
+ ip = lookup_byname_backend(key);
+ if (ip != NULL) {
+ size = strlen(ip) + 1;
+ if (size > len) {
+ wbcFreeMemory(ip);
+ return NSD_ERROR;
+ }
+ len -= size;
+ strncat(response,ip,size);
+ strncat(response,"\t",1);
+ size = strlen(key) + 1;
+ wbcFreeMemory(ip);
+ if (size > len) {
+ return NSD_ERROR;
+ }
+ strncat(response,key,size);
+ strncat(response,"\n",1);
+
+ found = True;
+ }
+ }
+
+ 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
+
+/* Allocate some space from the nss static buffer. The buffer and buflen
+ are the pointers passed in by the C library to the _nss_*_*
+ functions. */
+
+static char *get_static(char **buffer, size_t *buflen, size_t len)
+{
+ char *result;
+
+ /* Error check. We return false if things aren't set up right, or
+ there isn't enough buffer space left. */
+
+ if ((buffer == NULL) || (buflen == NULL) || (*buflen < len)) {
+ return NULL;
+ }
+
+ /* Return an index into the static buffer */
+
+ result = *buffer;
+ *buffer += len;
+ *buflen -= len;
+
+ return result;
+}
+
+/****************************************************************************
+gethostbyname() - we ignore any domain portion of the name and only
+handle names that are at most 15 characters long
+ **************************************************************************/
+_PUBLIC_ON_LINUX_
+NSS_STATUS
+_nss_wins_gethostbyname_r(const char *hostname,
+ struct hostent *he,
+ char *buffer,
+ size_t buflen,
+ int *errnop,
+ int *h_errnop)
+{
+ NSS_STATUS nss_status = NSS_STATUS_SUCCESS;
+ char *ip;
+ struct in_addr in;
+ int i;
+ fstring name;
+ size_t namelen;
+ int rc;
+
+#ifdef HAVE_PTHREAD
+ pthread_mutex_lock(&wins_nss_mutex);
+#endif
+
+ memset(he, '\0', sizeof(*he));
+ fstrcpy(name, hostname);
+
+ /* Do lookup */
+
+ ip = lookup_byname_backend(name);
+ if (ip == NULL) {
+ *h_errnop = HOST_NOT_FOUND;
+ nss_status = NSS_STATUS_NOTFOUND;
+ goto out;
+ }
+
+ rc = inet_pton(AF_INET, ip, &in);
+ wbcFreeMemory(ip);
+ if (rc == 0) {
+ *errnop = errno;
+ *h_errnop = NETDB_INTERNAL;
+ nss_status = NSS_STATUS_TRYAGAIN;
+ goto out;
+ }
+
+ /* Copy h_name */
+
+ namelen = strlen(name) + 1;
+
+ if ((he->h_name = get_static(&buffer, &buflen, namelen)) == NULL) {
+ *errnop = EAGAIN;
+ *h_errnop = NETDB_INTERNAL;
+ nss_status = NSS_STATUS_TRYAGAIN;
+ goto out;
+ }
+
+ memcpy(he->h_name, name, namelen);
+
+ /* Copy h_addr_list, align to pointer boundary first */
+
+ if ((i = (unsigned long)(buffer) % sizeof(char*)) != 0)
+ i = sizeof(char*) - i;
+
+ if (get_static(&buffer, &buflen, i) == NULL) {
+ *errnop = EAGAIN;
+ *h_errnop = NETDB_INTERNAL;
+ nss_status = NSS_STATUS_TRYAGAIN;
+ goto out;
+ }
+
+ if ((he->h_addr_list = (char **)get_static(
+ &buffer, &buflen, 2 * sizeof(char *))) == NULL) {
+ *errnop = EAGAIN;
+ *h_errnop = NETDB_INTERNAL;
+ nss_status = NSS_STATUS_TRYAGAIN;
+ goto out;
+ }
+
+ if ((he->h_addr_list[0] = get_static(&buffer, &buflen,
+ INADDRSZ)) == NULL) {
+ *errnop = EAGAIN;
+ *h_errnop = NETDB_INTERNAL;
+ nss_status = NSS_STATUS_TRYAGAIN;
+ goto out;
+ }
+
+ memcpy(he->h_addr_list[0], &in, INADDRSZ);
+
+ he->h_addr_list[1] = NULL;
+
+ /* Set h_addr_type and h_length */
+
+ he->h_addrtype = AF_INET;
+ he->h_length = INADDRSZ;
+
+ /* Set h_aliases */
+
+ if ((i = (unsigned long)(buffer) % sizeof(char*)) != 0)
+ i = sizeof(char*) - i;
+
+ if (get_static(&buffer, &buflen, i) == NULL) {
+ *errnop = EAGAIN;
+ *h_errnop = NETDB_INTERNAL;
+ nss_status = NSS_STATUS_TRYAGAIN;
+ goto out;
+ }
+
+ if ((he->h_aliases = (char **)get_static(
+ &buffer, &buflen, sizeof(char *))) == NULL) {
+ *errnop = EAGAIN;
+ *h_errnop = NETDB_INTERNAL;
+ nss_status = NSS_STATUS_TRYAGAIN;
+ goto out;
+ }
+
+ he->h_aliases[0] = NULL;
+
+ *h_errnop = NETDB_SUCCESS;
+ nss_status = NSS_STATUS_SUCCESS;
+
+ out:
+
+#ifdef HAVE_PTHREAD
+ pthread_mutex_unlock(&wins_nss_mutex);
+#endif
+ return nss_status;
+}
+
+
+_PUBLIC_ON_LINUX_
+NSS_STATUS
+_nss_wins_gethostbyname2_r(const char *name,
+ int af,
+ struct hostent *he,
+ char *buffer,
+ size_t buflen,
+ int *errnop,
+ int *h_errnop)
+{
+ NSS_STATUS nss_status;
+
+ if(af!=AF_INET) {
+ *errnop = EAFNOSUPPORT;
+ *h_errnop = NO_DATA;
+ nss_status = NSS_STATUS_UNAVAIL;
+ } else {
+ nss_status = _nss_wins_gethostbyname_r(name,
+ he,
+ buffer,
+ buflen,
+ errnop,
+ h_errnop);
+ }
+ return nss_status;
+}
+#endif
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