r25154: move winbindd code into winbindd/

metze
(This used to be commit 3ac7566ae14c48ff9b0f6b232e0ec4b2f73df558)

1 files changed, 301 insertions, 0 deletions

diff --git a/source3/winbindd/nss_info.c b/source3/winbindd/nss_info.c
new file mode 100644
index 0000000000..ea51e9dde8
--- /dev/null
+++ b/source3/winbindd/nss_info.c
@@ -0,0 +1,301 @@
+/* 
+   Unix SMB/CIFS implementation.
+   Idmap NSS headers
+
+   Copyright (C) Gerald Carter             2006
+
+   This library is free software; you can redistribute it and/or
+   modify it under the terms of the GNU Lesser General Public
+   License as published by the Free Software Foundation; either
+   version 3 of the License, or (at your option) any later version.
+   
+   This library 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
+   Library General Public License for more details.
+   
+   You should have received a copy of the GNU Lesser General Public License
+   along with this program.  If not, see <http://www.gnu.org/licenses/>.
+*/
+
+#include "includes.h"
+#include "nss_info.h"
+
+static struct nss_function_entry *backends = NULL;
+static struct nss_domain_entry *nss_domain_list = NULL;
+
+/**********************************************************************
+ Get idmap nss methods.
+**********************************************************************/
+
+static struct nss_function_entry *nss_get_backend(const char *name )
+{
+	struct nss_function_entry *entry = backends;
+
+	for(entry = backends; entry; entry = entry->next) {
+		if ( strequal(entry->name, name) )
+			return entry;
+	}
+
+	return NULL;
+}
+
+/*********************************************************************
+ Allow a module to register itself as a backend.
+**********************************************************************/
+
+ NTSTATUS smb_register_idmap_nss(int version, const char *name, struct nss_info_methods *methods)
+{
+	struct nss_function_entry *entry;
+
+ 	if ((version != SMB_NSS_INFO_INTERFACE_VERSION)) {
+		DEBUG(0, ("smb_register_idmap_nss: Failed to register idmap_nss module.\n"
+		          "The module was compiled against SMB_NSS_INFO_INTERFACE_VERSION %d,\n"
+		          "current SMB_NSS_INFO_INTERFACE_VERSION is %d.\n"
+		          "Please recompile against the current version of samba!\n",  
+			  version, SMB_NSS_INFO_INTERFACE_VERSION));
+		return NT_STATUS_OBJECT_TYPE_MISMATCH;
+  	}
+
+	if (!name || !name[0] || !methods) {
+		DEBUG(0,("smb_register_idmap_nss: called with NULL pointer or empty name!\n"));
+		return NT_STATUS_INVALID_PARAMETER;
+	}
+
+	if ( nss_get_backend(name) ) {
+		DEBUG(0,("smb_register_idmap_nss: idmap module %s "
+			 "already registered!\n", name));
+		return NT_STATUS_OBJECT_NAME_COLLISION;
+	}
+
+	entry = SMB_XMALLOC_P(struct nss_function_entry);
+	entry->name = smb_xstrdup(name);
+	entry->methods = methods;
+
+	DLIST_ADD(backends, entry);
+	DEBUG(5, ("smb_register_idmap_nss: Successfully added idmap "
+		  "nss backend '%s'\n", name));
+
+	return NT_STATUS_OK;
+}
+
+/********************************************************************
+ *******************************************************************/
+
+static BOOL parse_nss_parm( const char *config, char **backend, char **domain )
+{
+	char *p;
+	char *q;
+	int len;
+
+	*backend = *domain = NULL;
+	
+	if ( !config )
+		return False;
+	
+	p = strchr( config, ':' );
+	
+	/* if no : then the string must be the backend name only */
+
+	if ( !p ) {
+		*backend = SMB_STRDUP( config );
+		return (*backend != NULL);
+	}
+
+	/* split the string and return the two parts */
+
+	if ( strlen(p+1) > 0 ) {
+		*domain = SMB_STRDUP( p+1 );
+	}
+	
+	len = PTR_DIFF(p,config)+1;
+	if ( (q = SMB_MALLOC_ARRAY( char, len )) == NULL ) {
+		SAFE_FREE( *backend );
+		return False;
+	}
+	
+	StrnCpy( q, config, len-1);
+	q[len-1] = '\0';
+	*backend = q;
+
+	return True;
+}
+
+/********************************************************************
+ Each nss backend must not store global state, but rather be able 
+ to initialize the state on a per domain basis.
+ *******************************************************************/
+
+ NTSTATUS nss_init( const char **nss_list )
+{
+	NTSTATUS status;
+	static NTSTATUS nss_initialized = NT_STATUS_UNSUCCESSFUL;
+	int i;
+	char *backend, *domain;
+	struct nss_function_entry *nss_backend;
+	struct nss_domain_entry *nss_domain;
+
+	/* check for previous successful initializations */
+
+	if ( NT_STATUS_IS_OK(nss_initialized) )
+		return NT_STATUS_OK;
+	
+	/* The "template" backend should alqays be registered as it
+	   is a static module */
+
+	if ( (nss_backend = nss_get_backend( "template" )) == NULL ) {
+		static_init_nss_info;	       
+	}
+
+	/* Create the list of nss_domains (loading any shared plugins
+	   as necessary) */
+
+	for ( i=0; nss_list && nss_list[i]; i++ ) {
+
+		if ( !parse_nss_parm(nss_list[i], &backend, &domain) ) 	{
+			DEBUG(0,("nss_init: failed to parse \"%s\"!\n",
+				 nss_list[i]));
+			continue;			
+		}
+
+		/* validate the backend */
+
+		if ( (nss_backend = nss_get_backend( backend )) == NULL ) {
+			/* attempt to register the backend */
+			status = smb_probe_module( "nss_info", backend );
+			if ( !NT_STATUS_IS_OK(status) ) {
+				continue;
+			}
+			
+			/* try again */
+			if ( (nss_backend = nss_get_backend( backend )) == NULL ) {
+				DEBUG(0,("nss_init: unregistered backend %s!.  Skipping\n",
+					 backend));
+				continue;
+			}
+
+		}
+
+     		/* fill in the nss_domain_entry and add it to the 
+		   list of domains */
+
+		nss_domain = TALLOC_ZERO_P( nss_domain_list, struct nss_domain_entry );
+		if ( !nss_domain ) {
+			DEBUG(0,("nss_init: talloc() failure!\n"));
+			return NT_STATUS_NO_MEMORY;
+		}
+		
+		nss_domain->backend = nss_backend;
+		nss_domain->domain  = talloc_strdup( nss_domain, domain );
+
+		/* Try to init and ave the result */
+
+		nss_domain->init_status = nss_domain->backend->methods->init( nss_domain );
+			DLIST_ADD( nss_domain_list, nss_domain );
+		if ( !NT_STATUS_IS_OK(nss_domain->init_status) ) {			
+			DEBUG(0,("nss_init: Failed to init backend for %s domain!\n", 
+				 nss_domain->domain));
+		}
+
+		/* cleanup */
+
+		SAFE_FREE( backend );
+		SAFE_FREE( domain );		
+	}
+
+	if ( !nss_domain_list ) {
+		DEBUG(3,("nss_init: no nss backends configured.  "
+			 "Defaulting to \"template\".\n"));
+
+
+		/* we shouild default to use template here */
+	}
+	
+		
+	nss_initialized = NT_STATUS_OK;
+	
+	return NT_STATUS_OK;
+}
+
+/********************************************************************
+ *******************************************************************/
+
+static struct nss_domain_entry *find_nss_domain( const char *domain )
+{
+	NTSTATUS status;	
+	struct nss_domain_entry *p;
+
+	status = nss_init( lp_winbind_nss_info() );
+	if ( !NT_STATUS_IS_OK(status) ) {
+		DEBUG(4,("nss_get_info: Failed to init nss_info API (%s)!\n",
+			 nt_errstr(status)));
+		return NULL;
+	}
+	
+	for ( p=nss_domain_list; p; p=p->next ) {
+		if ( strequal( p->domain, domain ) )
+			break;
+	}
+	
+	/* If we didn't find a match, then use the default nss info */
+
+	if ( !p ) {
+		if ( !nss_domain_list ) {
+			return NULL;
+		}
+		
+		p = nss_domain_list;		
+	}
+
+	if ( !NT_STATUS_IS_OK( p->init_status ) ) {
+	       p->init_status = p->backend->methods->init( p );
+	}
+
+	return p;
+}
+
+/********************************************************************
+ *******************************************************************/
+
+ NTSTATUS nss_get_info( const char *domain, const DOM_SID *user_sid,
+		       TALLOC_CTX *ctx,
+		       ADS_STRUCT *ads, LDAPMessage *msg,
+		       char **homedir, char **shell, char **gecos,
+		       gid_t *p_gid)
+{
+	struct nss_domain_entry *p;
+	struct nss_info_methods *m;
+
+	if ( (p = find_nss_domain( domain )) == NULL ) {
+		DEBUG(4,("nss_get_info: Failed to find nss domain pointer for %s\n",
+			 domain ));
+		return NT_STATUS_NOT_FOUND;
+	}
+		
+	m = p->backend->methods;
+
+	return m->get_nss_info( p, user_sid, ctx, ads, msg, 
+				homedir, shell, gecos, p_gid );
+}
+
+/********************************************************************
+ *******************************************************************/
+
+ NTSTATUS nss_close( const char *parameters )
+{
+	struct nss_domain_entry *p = nss_domain_list;
+	struct nss_domain_entry *q;
+
+	while ( p && p->backend && p->backend->methods ) {
+		/* close the backend */
+		p->backend->methods->close_fn();
+
+		/* free the memory */
+		q = p;
+		p = p->next;
+		TALLOC_FREE( q );
+	}
+
+	return NT_STATUS_OK;
+}
+