r7415: * big change -- volker's new async winbindd from trunk

(This used to be commit a0ac9a8ffd4af31a0ebc423b4acbb2f043d865b8)

1 files changed, 1403 insertions, 0 deletions

diff --git a/source3/nsswitch/winbindd_async.c b/source3/nsswitch/winbindd_async.c
new file mode 100644
index 0000000000..9ac2acafd0
--- /dev/null
+++ b/source3/nsswitch/winbindd_async.c
@@ -0,0 +1,1403 @@
+/* 
+   Unix SMB/CIFS implementation.
+
+   Async helpers for blocking functions
+
+   Copyright (C) Volker Lendecke 2005
+   
+   The helpers always consist of three functions: 
+
+   * A request setup function that takes the necessary parameters together
+     with a continuation function that is to be called upon completion
+
+   * A private continuation function that is internal only. This is to be
+     called by the lower-level functions in do_async(). Its only task is to
+     properly call the continuation function named above.
+
+   * A worker function that is called inside the appropriate child process.
+
+   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"
+#include "winbindd.h"
+
+#undef DBGC_CLASS
+#define DBGC_CLASS DBGC_WINBIND
+
+struct do_async_state {
+	TALLOC_CTX *mem_ctx;
+	struct winbindd_request request;
+	struct winbindd_response response;
+	void (*cont)(TALLOC_CTX *mem_ctx,
+		     BOOL success,
+		     struct winbindd_response *response,
+		     void *c, void *private);
+	void *c, *private;
+};
+
+static void do_async_recv(void *private, BOOL success)
+{
+	struct do_async_state *state =
+		talloc_get_type_abort(private, struct do_async_state);
+
+	state->cont(state->mem_ctx, success, &state->response,
+		    state->c, state->private);
+}
+
+static void do_async(TALLOC_CTX *mem_ctx, struct winbindd_child *child,
+		     const struct winbindd_request *request,
+		     void (*cont)(TALLOC_CTX *mem_ctx, BOOL success,
+				  struct winbindd_response *response,
+				  void *c, void *private),
+		     void *c, void *private)
+{
+	struct do_async_state *state;
+
+	state = TALLOC_P(mem_ctx, struct do_async_state);
+	if (state == NULL) {
+		DEBUG(0, ("talloc failed\n"));
+		cont(mem_ctx, False, NULL, c, private);
+		return;
+	}
+
+	state->mem_ctx = mem_ctx;
+	state->request = *request;
+	state->request.length = sizeof(state->request);
+	state->cont = cont;
+	state->c = c;
+	state->private = private;
+
+	async_request(mem_ctx, child, &state->request,
+		      &state->response, do_async_recv, state);
+}
+
+static void do_async_domain(TALLOC_CTX *mem_ctx, struct winbindd_domain *domain,
+			    const struct winbindd_request *request,
+			    void (*cont)(TALLOC_CTX *mem_ctx, BOOL success,
+					 struct winbindd_response *response,
+					 void *c, void *private),
+			    void *c, void *private)
+{
+	struct do_async_state *state;
+
+	state = TALLOC_P(mem_ctx, struct do_async_state);
+	if (state == NULL) {
+		DEBUG(0, ("talloc failed\n"));
+		cont(mem_ctx, False, NULL, c, private);
+		return;
+	}
+
+	state->mem_ctx = mem_ctx;
+	state->request = *request;
+	state->request.length = sizeof(state->request);
+	state->cont = cont;
+	state->c = c;
+	state->private = private;
+
+	async_domain_request(mem_ctx, domain, &state->request,
+			     &state->response, do_async_recv, state);
+}
+
+static void idmap_set_mapping_recv(TALLOC_CTX *mem_ctx, BOOL success,
+				   struct winbindd_response *response,
+				   void *c, void *private)
+{
+	void (*cont)(void *priv, BOOL succ) = c;
+
+	if (!success) {
+		DEBUG(5, ("Could not trigger idmap_set_mapping\n"));
+		cont(private, False);
+		return;
+	}
+
+	if (response->result != WINBINDD_OK) {
+		DEBUG(5, ("idmap_set_mapping returned an error\n"));
+		cont(private, False);
+		return;
+	}
+
+	cont(private, True);
+}
+
+void idmap_set_mapping_async(TALLOC_CTX *mem_ctx, const DOM_SID *sid,
+			     unid_t id, int id_type,
+			     void (*cont)(void *private, BOOL success),
+			     void *private)
+{
+	struct winbindd_request request;
+	ZERO_STRUCT(request);
+	request.cmd = WINBINDD_DUAL_IDMAPSET;
+	if (id_type == ID_USERID)
+		request.data.dual_idmapset.uid = id.uid;
+	else
+		request.data.dual_idmapset.gid = id.gid;
+	request.data.dual_idmapset.type = id_type;
+	sid_to_string(request.data.dual_idmapset.sid, sid);
+
+	do_async(mem_ctx, idmap_child(), &request, idmap_set_mapping_recv,
+		 cont, private);
+}
+
+enum winbindd_result winbindd_dual_idmapset(struct winbindd_domain *domain,
+					    struct winbindd_cli_state *state)
+{
+	DOM_SID sid;
+	unid_t id;
+	NTSTATUS result;
+
+	DEBUG(3, ("[%5lu]: dual_idmapset\n", (unsigned long)state->pid));
+
+	if (!string_to_sid(&sid, state->request.data.dual_idmapset.sid))
+		return WINBINDD_ERROR;
+
+	if (state->request.data.dual_idmapset.type == ID_USERID)
+		id.uid = state->request.data.dual_idmapset.uid;
+	else
+		id.gid = state->request.data.dual_idmapset.gid;
+
+	result = idmap_set_mapping(&sid, id,
+				   state->request.data.dual_idmapset.type);
+	return NT_STATUS_IS_OK(result) ? WINBINDD_OK : WINBINDD_ERROR;
+}
+
+static void idmap_sid2uid_recv(TALLOC_CTX *mem_ctx, BOOL success,
+			       struct winbindd_response *response,
+			       void *c, void *private);
+
+void idmap_sid2uid_async(TALLOC_CTX *mem_ctx, const DOM_SID *sid, BOOL alloc,
+			 void (*cont)(void *private, BOOL success, uid_t uid),
+			 void *private)
+{
+	struct winbindd_request request;
+	ZERO_STRUCT(request);
+	request.cmd = WINBINDD_DUAL_SID2UID;
+	sid_to_string(request.data.dual_sid2id.sid, sid);
+	request.data.dual_sid2id.alloc = alloc;
+	do_async(mem_ctx, idmap_child(), &request, idmap_sid2uid_recv,
+		 cont, private);
+}
+
+enum winbindd_result winbindd_dual_sid2uid(struct winbindd_domain *domain,
+					   struct winbindd_cli_state *state)
+{
+	DOM_SID sid;
+	NTSTATUS result;
+
+	DEBUG(3, ("[%5lu]: sid to uid %s\n", (unsigned long)state->pid,
+		  state->request.data.dual_sid2id.sid));
+
+	if (!string_to_sid(&sid, state->request.data.dual_sid2id.sid)) {
+		DEBUG(1, ("Could not get convert sid %s from string\n",
+			  state->request.data.dual_sid2id.sid));
+		return WINBINDD_ERROR;
+	}
+
+	/* Find uid for this sid and return it, possibly ask the slow remote
+	 * idmap */
+
+	result = idmap_sid_to_uid(&sid, &(state->response.data.uid),
+				  state->request.data.dual_sid2id.alloc ?
+				  0 : ID_QUERY_ONLY);
+
+	return NT_STATUS_IS_OK(result) ? WINBINDD_OK : WINBINDD_ERROR;
+}
+
+static void idmap_sid2uid_recv(TALLOC_CTX *mem_ctx, BOOL success,
+			       struct winbindd_response *response,
+			       void *c, void *private)
+{
+	void (*cont)(void *priv, BOOL succ, uid_t uid) = c;
+
+	if (!success) {
+		DEBUG(5, ("Could not trigger sid2uid\n"));
+		cont(private, False, 0);
+		return;
+	}
+
+	if (response->result != WINBINDD_OK) {
+		DEBUG(5, ("sid2uid returned an error\n"));
+		cont(private, False, 0);
+		return;
+	}
+
+	cont(private, True, response->data.uid);
+}
+			 
+static void uid2name_recv(TALLOC_CTX *mem_ctx, BOOL success,
+			  struct winbindd_response *response,
+			  void *c, void *private);
+
+void winbindd_uid2name_async(TALLOC_CTX *mem_ctx, uid_t uid,
+			     void (*cont)(void *private, BOOL success,
+					  const char *name),
+			     void *private)
+{
+	struct winbindd_request request;
+	ZERO_STRUCT(request);
+	request.cmd = WINBINDD_DUAL_UID2NAME;
+	request.data.uid = uid;
+	do_async(mem_ctx, idmap_child(), &request, uid2name_recv,
+		 cont, private);
+}
+
+enum winbindd_result winbindd_dual_uid2name(struct winbindd_domain *domain,
+					    struct winbindd_cli_state *state)
+{
+	struct passwd *pw;
+
+	DEBUG(3, ("[%5lu]: uid2name %lu\n", (unsigned long)state->pid, 
+		  (unsigned long)state->request.data.uid));
+
+	pw = getpwuid(state->request.data.uid);
+	if (pw == NULL) {
+		DEBUG(5, ("User %lu not found\n",
+			  (unsigned long)state->request.data.uid));
+		return WINBINDD_ERROR;
+	}
+
+	fstrcpy(state->response.data.name.name, pw->pw_name);
+	return WINBINDD_OK;
+}
+
+static void uid2name_recv(TALLOC_CTX *mem_ctx, BOOL success,
+			  struct winbindd_response *response,
+			  void *c, void *private)
+{
+	void (*cont)(void *priv, BOOL succ, const char *name) = c;
+
+	if (!success) {
+		DEBUG(5, ("Could not trigger uid2name\n"));
+		cont(private, False, NULL);
+		return;
+	}
+
+	if (response->result != WINBINDD_OK) {
+		DEBUG(5, ("uid2name returned an error\n"));
+		cont(private, False, NULL);
+		return;
+	}
+
+	cont(private, True, response->data.name.name);
+}
+
+static void name2uid_recv(TALLOC_CTX *mem_ctx, BOOL success,
+			  struct winbindd_response *response,
+			  void *c, void *private);
+
+static void winbindd_name2uid_async(TALLOC_CTX *mem_ctx, const char *name,
+				    void (*cont)(void *private, BOOL success,
+						 uid_t uid),
+				    void *private)
+{
+	struct winbindd_request request;
+	ZERO_STRUCT(request);
+	request.cmd = WINBINDD_DUAL_NAME2UID;
+	fstrcpy(request.data.username, name);
+	do_async(mem_ctx, idmap_child(), &request, name2uid_recv,
+		 cont, private);
+}
+
+enum winbindd_result winbindd_dual_name2uid(struct winbindd_domain *domain,
+					    struct winbindd_cli_state *state)
+{
+	struct passwd *pw;
+
+	/* Ensure null termination */
+	state->request.data.username
+		[sizeof(state->request.data.username)-1] = '\0';
+
+	DEBUG(3, ("[%5lu]: name2uid %s\n", (unsigned long)state->pid, 
+		  state->request.data.username));
+
+	pw = getpwnam(state->request.data.username);
+	if (pw == NULL) {
+		return WINBINDD_ERROR;
+	}
+
+	state->response.data.uid = pw->pw_uid;
+	return WINBINDD_OK;
+}
+
+static void name2uid_recv(TALLOC_CTX *mem_ctx, BOOL success,
+			  struct winbindd_response *response,
+			  void *c, void *private)
+{
+	void (*cont)(void *priv, BOOL succ, uid_t uid) = c;
+
+	if (!success) {
+		DEBUG(5, ("Could not trigger name2uid\n"));
+		cont(private, False, 0);
+		return;
+	}
+
+	if (response->result != WINBINDD_OK) {
+		DEBUG(5, ("name2uid returned an error\n"));
+		cont(private, False, 0);
+		return;
+	}
+
+	cont(private, True, response->data.uid);
+}
+
+static void idmap_sid2gid_recv(TALLOC_CTX *mem_ctx, BOOL success,
+			       struct winbindd_response *response,
+			       void *c, void *private);
+
+void idmap_sid2gid_async(TALLOC_CTX *mem_ctx, const DOM_SID *sid, BOOL alloc,
+			 void (*cont)(void *private, BOOL success, gid_t gid),
+			 void *private)
+{
+	struct winbindd_request request;
+	ZERO_STRUCT(request);
+	request.cmd = WINBINDD_DUAL_SID2GID;
+	sid_to_string(request.data.dual_sid2id.sid, sid);
+	request.data.dual_sid2id.alloc = alloc;
+	do_async(mem_ctx, idmap_child(), &request, idmap_sid2gid_recv,
+		 cont, private);
+}
+
+enum winbindd_result winbindd_dual_sid2gid(struct winbindd_domain *domain,
+					   struct winbindd_cli_state *state)
+{
+	DOM_SID sid;
+	NTSTATUS result;
+
+	DEBUG(3, ("[%5lu]: sid to gid %s\n", (unsigned long)state->pid,
+		  state->request.data.dual_sid2id.sid));
+
+	if (!string_to_sid(&sid, state->request.data.dual_sid2id.sid)) {
+		DEBUG(1, ("Could not get convert sid %s from string\n",
+			  state->request.data.dual_sid2id.sid));
+		return WINBINDD_ERROR;
+	}
+
+	/* Find gid for this sid and return it, possibly ask the slow remote
+	 * idmap */
+
+	result = idmap_sid_to_gid(&sid, &(state->response.data.gid),
+				  state->request.data.dual_sid2id.alloc ?
+				  0 : ID_QUERY_ONLY);
+
+	return NT_STATUS_IS_OK(result) ? WINBINDD_OK : WINBINDD_ERROR;
+}
+
+static void idmap_sid2gid_recv(TALLOC_CTX *mem_ctx, BOOL success,
+			       struct winbindd_response *response,
+			       void *c, void *private)
+{
+	void (*cont)(void *priv, BOOL succ, gid_t gid) = c;
+
+	if (!success) {
+		DEBUG(5, ("Could not trigger sid2gid\n"));
+		cont(private, False, 0);
+		return;
+	}
+
+	if (response->result != WINBINDD_OK) {
+		DEBUG(5, ("sid2gid returned an error\n"));
+		cont(private, False, 0);
+		return;
+	}
+
+	cont(private, True, response->data.gid);
+}
+			 
+static void gid2name_recv(TALLOC_CTX *mem_ctx, BOOL success,
+			  struct winbindd_response *response,
+			  void *c, void *private)
+{
+	void (*cont)(void *priv, BOOL succ, const char *name) = c;
+
+	if (!success) {
+		DEBUG(5, ("Could not trigger gid2name\n"));
+		cont(private, False, NULL);
+		return;
+	}
+
+	if (response->result != WINBINDD_OK) {
+		DEBUG(5, ("gid2name returned an error\n"));
+		cont(private, False, NULL);
+		return;
+	}
+
+	cont(private, True, response->data.name.name);
+}
+
+void winbindd_gid2name_async(TALLOC_CTX *mem_ctx, gid_t gid,
+			     void (*cont)(void *private, BOOL success,
+					  const char *name),
+			     void *private)
+{
+	struct winbindd_request request;
+	ZERO_STRUCT(request);
+	request.cmd = WINBINDD_DUAL_GID2NAME;
+	request.data.gid = gid;
+	do_async(mem_ctx, idmap_child(), &request, gid2name_recv,
+		 cont, private);
+}
+
+enum winbindd_result winbindd_dual_gid2name(struct winbindd_domain *domain,
+					    struct winbindd_cli_state *state)
+{
+	struct group *gr;
+
+	DEBUG(3, ("[%5lu]: gid2name %lu\n", (unsigned long)state->pid, 
+		  (unsigned long)state->request.data.gid));
+
+	gr = getgrgid(state->request.data.gid);
+	if (gr == NULL)
+		return WINBINDD_ERROR;
+
+	fstrcpy(state->response.data.name.name, gr->gr_name);
+	return WINBINDD_OK;
+}
+
+static void name2gid_recv(TALLOC_CTX *mem_ctx, BOOL success,
+			  struct winbindd_response *response,
+			  void *c, void *private);
+
+static void winbindd_name2gid_async(TALLOC_CTX *mem_ctx, const char *name,
+				    void (*cont)(void *private, BOOL success,
+						 gid_t gid),
+				    void *private)
+{
+	struct winbindd_request request;
+	ZERO_STRUCT(request);
+	request.cmd = WINBINDD_DUAL_NAME2GID;
+	fstrcpy(request.data.groupname, name);
+	do_async(mem_ctx, idmap_child(), &request, name2gid_recv,
+		 cont, private);
+}
+
+enum winbindd_result winbindd_dual_name2gid(struct winbindd_domain *domain,
+					    struct winbindd_cli_state *state)
+{
+	struct group *gr;
+
+	/* Ensure null termination */
+	state->request.data.groupname
+		[sizeof(state->request.data.groupname)-1] = '\0';
+
+	DEBUG(3, ("[%5lu]: name2gid %s\n", (unsigned long)state->pid, 
+		  state->request.data.groupname));
+
+	gr = getgrnam(state->request.data.groupname);
+	if (gr == NULL) {
+		return WINBINDD_ERROR;
+	}
+
+	state->response.data.gid = gr->gr_gid;
+	return WINBINDD_OK;
+}
+
+static void name2gid_recv(TALLOC_CTX *mem_ctx, BOOL success,
+			  struct winbindd_response *response,
+			  void *c, void *private)
+{
+	void (*cont)(void *priv, BOOL succ, gid_t gid) = c;
+
+	if (!success) {
+		DEBUG(5, ("Could not trigger name2gid\n"));
+		cont(private, False, 0);
+		return;
+	}
+
+	if (response->result != WINBINDD_OK) {
+		DEBUG(5, ("name2gid returned an error\n"));
+		cont(private, False, 0);
+		return;
+	}
+
+	cont(private, True, response->data.gid);
+}
+
+
+static void lookupsid_recv(TALLOC_CTX *mem_ctx, BOOL success,
+			   struct winbindd_response *response,
+			   void *c, void *private)
+{
+	void (*cont)(void *priv, BOOL succ, const char *dom_name,
+		     const char *name, enum SID_NAME_USE type) = c;
+
+	if (!success) {
+		DEBUG(5, ("Could not trigger lookupsid\n"));
+		cont(private, False, NULL, NULL, SID_NAME_UNKNOWN);
+		return;
+	}
+
+	if (response->result != WINBINDD_OK) {
+		DEBUG(5, ("lookupsid returned an error\n"));
+		cont(private, False, NULL, NULL, SID_NAME_UNKNOWN);
+		return;
+	}
+
+	cont(private, True, response->data.name.dom_name,
+	     response->data.name.name, response->data.name.type);
+}
+
+void winbindd_lookupsid_async(TALLOC_CTX *mem_ctx, const DOM_SID *sid,
+			      void (*cont)(void *private, BOOL success,
+					   const char *dom_name,
+					   const char *name,
+					   enum SID_NAME_USE type),
+			      void *private)
+{
+	struct winbindd_domain *domain;
+	struct winbindd_request request;
+
+	domain = find_lookup_domain_from_sid(sid);
+	if (domain == NULL) {
+		DEBUG(5, ("Could not find domain for sid %s\n",
+			  sid_string_static(sid)));
+		cont(private, False, NULL, NULL, SID_NAME_UNKNOWN);
+		return;
+	}
+
+	ZERO_STRUCT(request);
+	request.cmd = WINBINDD_LOOKUPSID;
+	fstrcpy(request.data.sid, sid_string_static(sid));
+
+	do_async_domain(mem_ctx, domain, &request, lookupsid_recv,
+			cont, private);
+}
+
+enum winbindd_result winbindd_dual_lookupsid(struct winbindd_domain *domain,
+					     struct winbindd_cli_state *state)
+{
+	enum SID_NAME_USE type;
+	DOM_SID sid;
+	fstring name;
+	fstring dom_name;
+
+	/* Ensure null termination */
+	state->request.data.sid[sizeof(state->request.data.sid)-1]='\0';
+
+	DEBUG(3, ("[%5lu]: lookupsid %s\n", (unsigned long)state->pid, 
+		  state->request.data.sid));
+
+	/* Lookup sid from PDC using lsa_lookup_sids() */
+
+	if (!string_to_sid(&sid, state->request.data.sid)) {
+		DEBUG(5, ("%s not a SID\n", state->request.data.sid));
+		return WINBINDD_ERROR;
+	}
+
+	/* Lookup the sid */
+
+	if (!winbindd_lookup_name_by_sid(state->mem_ctx, &sid, dom_name, name,
+					 &type)) {
+		return WINBINDD_ERROR;
+	}
+
+	fstrcpy(state->response.data.name.dom_name, dom_name);
+	fstrcpy(state->response.data.name.name, name);
+	state->response.data.name.type = type;
+
+	return WINBINDD_OK;
+}
+
+static void lookupname_recv(TALLOC_CTX *mem_ctx, BOOL success,
+			    struct winbindd_response *response,
+			    void *c, void *private)
+{
+	void (*cont)(void *priv, BOOL succ, const DOM_SID *sid,
+		     enum SID_NAME_USE type) = c;
+	DOM_SID sid;
+
+	if (!success) {
+		DEBUG(5, ("Could not trigger lookup_name\n"));
+		cont(private, False, NULL, SID_NAME_UNKNOWN);
+		return;
+	}
+
+	if (response->result != WINBINDD_OK) {
+		DEBUG(5, ("lookup_name returned an error\n"));
+		cont(private, False, NULL, SID_NAME_UNKNOWN);
+		return;
+	}
+
+	if (!string_to_sid(&sid, response->data.sid.sid)) {
+		DEBUG(0, ("Could not convert string %s to sid\n",
+			  response->data.sid.sid));
+		cont(private, False, NULL, SID_NAME_UNKNOWN);
+		return;
+	}
+
+	cont(private, True, &sid, response->data.sid.type);
+}
+
+void winbindd_lookupname_async(TALLOC_CTX *mem_ctx, const char *dom_name,
+			       const char *name,
+			       void (*cont)(void *private, BOOL success,
+					    const DOM_SID *sid,
+					    enum SID_NAME_USE type),
+			       void *private)
+{
+	struct winbindd_request request;
+	struct winbindd_domain *domain;
+
+	domain = find_lookup_domain_from_name(dom_name);
+
+	if (domain == NULL) {
+		DEBUG(5, ("Could not find domain for name %s\n", dom_name));
+		cont(private, False, NULL, SID_NAME_UNKNOWN);
+		return;
+	}
+
+	ZERO_STRUCT(request);
+	request.cmd = WINBINDD_LOOKUPNAME;
+	fstrcpy(request.data.name.dom_name, dom_name);
+	fstrcpy(request.data.name.name, name);
+
+	do_async_domain(mem_ctx, domain, &request, lookupname_recv,
+			cont, private);
+}
+
+enum winbindd_result winbindd_dual_lookupname(struct winbindd_domain *domain,
+					      struct winbindd_cli_state *state)
+{
+	enum SID_NAME_USE type;
+	char *name_domain, *name_user;
+	DOM_SID sid;
+	char *p;
+
+	/* Ensure null termination */
+	state->request.data.sid[sizeof(state->request.data.name.dom_name)-1]='\0';
+
+	/* Ensure null termination */
+	state->request.data.sid[sizeof(state->request.data.name.name)-1]='\0';
+
+	/* cope with the name being a fully qualified name */
+	p = strstr(state->request.data.name.name, lp_winbind_separator());
+	if (p) {
+		*p = 0;
+		name_domain = state->request.data.name.name;
+		name_user = p+1;
+	} else {
+		name_domain = state->request.data.name.dom_name;
+		name_user = state->request.data.name.name;
+	}
+
+	DEBUG(3, ("[%5lu]: lookupname %s%s%s\n", (unsigned long)state->pid,
+		  name_domain, lp_winbind_separator(), name_user));
+
+	/* Lookup name from PDC using lsa_lookup_names() */
+	if (!winbindd_lookup_sid_by_name(state->mem_ctx, domain, name_domain,
+					 name_user, &sid, &type)) {
+		return WINBINDD_ERROR;
+	}
+
+	sid_to_string(state->response.data.sid.sid, &sid);
+	state->response.data.sid.type = type;
+
+	return WINBINDD_OK;
+}
+
+static BOOL print_sidlist(TALLOC_CTX *mem_ctx, const DOM_SID *sids,
+			  int num_sids, char **result)
+{
+	int i;
+	size_t buflen = 0;
+	ssize_t len = 0;
+
+	*result = NULL;
+	for (i=0; i<num_sids; i++) {
+		sprintf_append(mem_ctx, result, &len, &buflen,
+			       "%s\n", sid_string_static(&sids[i]));
+	}
+
+	if ((num_sids != 0) && (*result == NULL)) {
+		return False;
+	}
+
+	return True;
+}
+
+static BOOL parse_sidlist(TALLOC_CTX *mem_ctx, char *sidstr,
+			  DOM_SID **sids, int *num_sids)
+{
+	char *p, *q;
+
+	p = sidstr;
+	if (p == NULL)
+		return True;
+
+	while (p[0] != '\0') {
+		DOM_SID sid;
+		q = strchr(p, '\n');
+		if (q == NULL) {
+			DEBUG(0, ("Got invalid sidstr: %s\n", p));
+			return False;
+		}
+		*q = '\0';
+		q += 1;
+		if (!string_to_sid(&sid, p)) {
+			DEBUG(0, ("Could not parse sid %s\n", p));
+			return False;
+		}
+		add_sid_to_array(mem_ctx, &sid, sids, num_sids);
+		p = q;
+	}
+	return True;
+}
+
+static void getsidaliases_recv(TALLOC_CTX *mem_ctx, BOOL success,
+			       struct winbindd_response *response,
+			       void *c, void *private)
+{
+	void (*cont)(void *priv, BOOL succ,
+		     DOM_SID *aliases, int num_aliases) = c;
+	char *aliases_str;
+	DOM_SID *sids = NULL;
+	int num_sids = 0;
+
+	if (!success) {
+		DEBUG(5, ("Could not trigger getsidaliases\n"));
+		cont(private, success, NULL, 0);
+		return;
+	}
+
+	if (response->result != WINBINDD_OK) {
+		DEBUG(5, ("getsidaliases returned an error\n"));
+		cont(private, False, NULL, 0);
+		return;
+	}
+
+	aliases_str = response->extra_data;
+
+	if (aliases_str == NULL) {
+		DEBUG(10, ("getsidaliases return 0 SIDs\n"));
+		cont(private, True, NULL, 0);
+		return;
+	}
+
+	if (!parse_sidlist(mem_ctx, aliases_str, &sids, &num_sids)) {
+		DEBUG(0, ("Could not parse sids\n"));
+		cont(private, False, NULL, 0);
+		return;
+	}
+
+	SAFE_FREE(response->extra_data);
+
+	cont(private, True, sids, num_sids);
+}
+
+void winbindd_getsidaliases_async(struct winbindd_domain *domain,
+				  TALLOC_CTX *mem_ctx,
+				  const DOM_SID *sids, int num_sids,
+			 	  void (*cont)(void *private,
+				 	       BOOL success,
+					       const DOM_SID *aliases,
+					       int num_aliases),
+				  void *private)
+{
+	struct winbindd_request request;
+	char *sidstr = NULL;
+	char *keystr;
+
+	if (num_sids == 0) {
+		cont(private, True, NULL, 0);
+		return;
+	}
+
+	if (!print_sidlist(mem_ctx, sids, num_sids, &sidstr)) {
+		cont(private, False, NULL, 0);
+		return;
+	}
+
+	keystr = cache_store_request_data(mem_ctx, sidstr);
+	if (keystr == NULL) {
+		cont(private, False, NULL, 0);
+		return;
+	}
+
+	ZERO_STRUCT(request);
+	request.cmd = WINBINDD_DUAL_GETSIDALIASES;
+	fstrcpy(request.domain_name, domain->name);
+	fstrcpy(request.data.dual_sidaliases.cache_key, keystr);
+
+	do_async_domain(mem_ctx, domain, &request, getsidaliases_recv,
+			cont, private);
+}
+
+enum winbindd_result winbindd_dual_getsidaliases(struct winbindd_domain *domain,
+						 struct winbindd_cli_state *state)
+{
+	DOM_SID *sids = NULL;
+	int num_sids = 0;
+	char *key = state->request.data.dual_sidaliases.cache_key;
+	char *sidstr;
+	int i, num_aliases;
+	uint32 *alias_rids;
+	NTSTATUS result;
+
+	DEBUG(3, ("[%5lu]: getsidaliases\n", (unsigned long)state->pid));
+
+	/* Ensure null termination */
+        state->request.domain_name[sizeof(state->request.domain_name)-1]='\0';
+        state->request.data.dual_sidaliases.cache_key
+		[sizeof(state->request.data.dual_sidaliases.cache_key)-1]='\0';
+
+	sidstr = cache_retrieve_request_data(state->mem_ctx, key);
+	if (sidstr == NULL)
+		sidstr = talloc_strdup(state->mem_ctx, "\n"); /* No SID */
+
+	DEBUG(10, ("Sidlist: %s\n", sidstr));
+
+	if (!parse_sidlist(state->mem_ctx, sidstr, &sids, &num_sids)) {
+		DEBUG(0, ("Could not parse SID list: %s\n", sidstr));
+		return WINBINDD_ERROR;
+	}
+
+	num_aliases = 0;
+	alias_rids = NULL;
+
+	result = domain->methods->lookup_useraliases(domain,
+						     state->mem_ctx,
+						     num_sids, sids,
+						     &num_aliases,
+						     &alias_rids);
+
+	if (!NT_STATUS_IS_OK(result)) {
+		DEBUG(3, ("Could not lookup_useraliases: %s\n",
+			  nt_errstr(result)));
+		return WINBINDD_ERROR;
+	}
+
+	num_sids = 0;
+	sids = NULL;
+
+	DEBUG(10, ("Got %d aliases\n", num_aliases));
+
+	for (i=0; i<num_aliases; i++) {
+		DOM_SID sid;
+		DEBUGADD(10, (" rid %d\n", alias_rids[i]));
+		sid_copy(&sid, &domain->sid);
+		sid_append_rid(&sid, alias_rids[i]);
+		add_sid_to_array(state->mem_ctx, &sid, &sids, &num_sids);
+	}
+
+	if (!print_sidlist(NULL, sids, num_sids,
+			   (char **)&state->response.extra_data)) {
+		DEBUG(0, ("Could not print_sidlist\n"));
+		return WINBINDD_ERROR;
+	}
+
+	if (state->response.extra_data != NULL) {
+		DEBUG(10, ("aliases_list: %s\n",
+			   (char *)state->response.extra_data));
+		state->response.length += strlen(state->response.extra_data)+1;
+	}
+	
+	return WINBINDD_OK;
+}
+
+struct gettoken_state {
+	TALLOC_CTX *mem_ctx;
+	DOM_SID user_sid;
+	struct winbindd_domain *alias_domain;
+	struct winbindd_domain *builtin_domain;
+	DOM_SID *sids;
+	int num_sids;
+	void (*cont)(void *private, BOOL success, DOM_SID *sids, int num_sids);
+	void *private;
+};
+
+static void gettoken_recvdomgroups(TALLOC_CTX *mem_ctx, BOOL success,
+				   struct winbindd_response *response,
+				   void *c, void *private);
+static void gettoken_recvaliases(void *private, BOOL success,
+				 const DOM_SID *aliases,
+				 int num_aliases);
+				 
+
+void winbindd_gettoken_async(TALLOC_CTX *mem_ctx, const DOM_SID *user_sid,
+			     void (*cont)(void *private, BOOL success,
+					  DOM_SID *sids, int num_sids),
+			     void *private)
+{
+	struct winbindd_domain *domain;
+	struct winbindd_request request;
+	struct gettoken_state *state;
+
+	state = TALLOC_P(mem_ctx, struct gettoken_state);
+	if (state == NULL) {
+		DEBUG(0, ("talloc failed\n"));
+		cont(private, False, NULL, 0);
+		return;
+	}
+
+	state->mem_ctx = mem_ctx;
+	sid_copy(&state->user_sid, user_sid);
+	state->alias_domain = find_our_domain();
+	state->builtin_domain = find_builtin_domain();
+	state->cont = cont;
+	state->private = private;
+
+	domain = find_domain_from_sid_noinit(user_sid);
+	if (domain == NULL) {
+		DEBUG(5, ("Could not find domain from SID %s\n",
+			  sid_string_static(user_sid)));
+		cont(private, False, NULL, 0);
+		return;
+	}
+
+	ZERO_STRUCT(request);
+	request.cmd = WINBINDD_GETUSERDOMGROUPS;
+	fstrcpy(request.data.sid, sid_string_static(user_sid));
+
+	do_async_domain(mem_ctx, domain, &request, gettoken_recvdomgroups,
+			NULL, state);
+}
+
+static void gettoken_recvdomgroups(TALLOC_CTX *mem_ctx, BOOL success,
+				   struct winbindd_response *response,
+				   void *c, void *private)
+{
+	struct gettoken_state *state =
+		talloc_get_type_abort(private, struct gettoken_state);
+	char *sids_str;
+	
+	if (!success) {
+		DEBUG(10, ("Could not get domain groups\n"));
+		state->cont(state->private, False, NULL, 0);
+		return;
+	}
+
+	sids_str = response->extra_data;
+
+	if (sids_str == NULL) {
+		DEBUG(10, ("Received no domain groups\n"));
+		state->cont(state->private, True, NULL, 0);
+		return;
+	}
+
+	state->sids = NULL;
+	state->num_sids = 0;
+
+	add_sid_to_array(mem_ctx, &state->user_sid, &state->sids,
+			 &state->num_sids);
+
+	if (!parse_sidlist(mem_ctx, sids_str, &state->sids,
+			   &state->num_sids)) {
+		DEBUG(0, ("Could not parse sids\n"));
+		state->cont(state->private, False, NULL, 0);
+		return;
+	}
+
+	SAFE_FREE(response->extra_data);
+
+	if (state->alias_domain == NULL) {
+		DEBUG(10, ("Don't expand domain local groups\n"));
+		state->cont(state->private, True, state->sids,
+			    state->num_sids);
+		return;
+	}
+
+	winbindd_getsidaliases_async(state->alias_domain, mem_ctx,
+				     state->sids, state->num_sids,
+				     gettoken_recvaliases, state);
+}
+
+static void gettoken_recvaliases(void *private, BOOL success,
+				 const DOM_SID *aliases,
+				 int num_aliases)
+{
+	struct gettoken_state *state = private;
+	int i;
+
+	if (!success) {
+		DEBUG(10, ("Could not receive domain local groups\n"));
+		state->cont(state->private, False, NULL, 0);
+		return;
+	}
+
+	for (i=0; i<num_aliases; i++)
+		add_sid_to_array(state->mem_ctx, &aliases[i],
+				 &state->sids, &state->num_sids);
+
+	if (state->builtin_domain != NULL) {
+		struct winbindd_domain *builtin_domain = state->builtin_domain;
+		DEBUG(10, ("Expanding our own local groups\n"));
+		state->builtin_domain = NULL;
+		winbindd_getsidaliases_async(builtin_domain, state->mem_ctx,
+					     state->sids, state->num_sids,
+					     gettoken_recvaliases, state);
+		return;
+	}
+
+	state->cont(state->private, True, state->sids, state->num_sids);
+}
+
+struct sid2uid_state {
+	TALLOC_CTX *mem_ctx;
+	DOM_SID sid;
+	char *username;
+	uid_t uid;
+	void (*cont)(void *private, BOOL success, uid_t uid);
+	void *private;
+};
+
+static void sid2uid_lookup_sid_recv(void *private, BOOL success,
+				    const char *dom_name, const char *name,
+				    enum SID_NAME_USE type);
+static void sid2uid_noalloc_recv(void *private, BOOL success, uid_t uid);
+static void sid2uid_alloc_recv(void *private, BOOL success, uid_t uid);
+static void sid2uid_name2uid_recv(void *private, BOOL success, uid_t uid);
+static void sid2uid_set_mapping_recv(void *private, BOOL success);
+
+void winbindd_sid2uid_async(TALLOC_CTX *mem_ctx, const DOM_SID *sid,
+			    void (*cont)(void *private, BOOL success,
+					 uid_t uid),
+			    void *private)
+{
+	struct sid2uid_state *state;
+	NTSTATUS result;
+	uid_t uid;
+
+	if (idmap_proxyonly()) {
+		DEBUG(10, ("idmap proxy only\n"));
+		cont(private, False, 0);
+		return;
+	}
+
+	/* Query only the local tdb, everything else might possibly block */
+
+	result = idmap_sid_to_uid(sid, &uid, ID_QUERY_ONLY|ID_CACHE_ONLY);
+
+	if (NT_STATUS_IS_OK(result)) {
+		cont(private, True, uid);
+		return;
+	}
+
+	state = TALLOC_P(mem_ctx, struct sid2uid_state);
+	if (state == NULL) {
+		DEBUG(0, ("talloc failed\n"));
+		cont(private, False, 0);
+		return;
+	}
+
+	state->mem_ctx = mem_ctx;
+	state->sid = *sid;
+	state->cont = cont;
+	state->private = private;
+
+	/* Let's see if it's really a user before allocating a uid */
+
+	winbindd_lookupsid_async(mem_ctx, sid, sid2uid_lookup_sid_recv, state);
+}
+
+static void sid2uid_lookup_sid_recv(void *private, BOOL success,
+				    const char *dom_name, const char *name,
+				    enum SID_NAME_USE type)
+{
+	struct sid2uid_state *state =
+		talloc_get_type_abort(private, struct sid2uid_state);
+
+	if (!success) {
+		DEBUG(5, ("Could not trigger lookup_sid\n"));
+		state->cont(state->private, False, 0);
+		return;
+	}
+
+	if ((type != SID_NAME_USER) && (type != SID_NAME_COMPUTER)) {
+		DEBUG(5, ("SID is not a user\n"));
+		state->cont(state->private, False, 0);
+		return;
+	}
+
+	state->username = talloc_strdup(state->mem_ctx, name);
+
+	/* Ask the possibly blocking remote IDMAP */
+
+	idmap_sid2uid_async(state->mem_ctx, &state->sid, False,
+			    sid2uid_noalloc_recv, state);
+}
+
+static void sid2uid_noalloc_recv(void *private, BOOL success, uid_t uid)
+{
+	struct sid2uid_state *state =
+		talloc_get_type_abort(private, struct sid2uid_state);
+
+	if (success) {
+		DEBUG(10, ("found uid for sid %s in remote backend\n",
+			   sid_string_static(&state->sid)));
+		state->cont(state->private, True, uid);
+		return;
+	}
+
+	if (lp_winbind_trusted_domains_only() && 
+	    (sid_compare_domain(&state->sid, &find_our_domain()->sid) == 0)) {
+		DEBUG(10, ("Trying to go via nss\n"));
+		winbindd_name2uid_async(state->mem_ctx, state->username,
+					sid2uid_name2uid_recv, state);
+		return;
+	}
+
+	/* To be done: Here we're going to try the unixinfo pipe */
+
+	/* Now allocate a uid */
+
+	idmap_sid2uid_async(state->mem_ctx, &state->sid, True,
+			    sid2uid_alloc_recv, state);
+}
+
+static void sid2uid_alloc_recv(void *private, BOOL success, uid_t uid)
+{
+	struct sid2uid_state *state =
+		talloc_get_type_abort(private, struct sid2uid_state);
+
+	if (!success) {
+		DEBUG(5, ("Could not allocate uid\n"));
+		state->cont(state->private, False, 0);
+		return;
+	}
+
+	state->cont(state->private, True, uid);
+}
+
+static void sid2uid_name2uid_recv(void *private, BOOL success, uid_t uid)
+{
+	struct sid2uid_state *state =
+		talloc_get_type_abort(private, struct sid2uid_state);
+	unid_t id;
+
+	if (!success) {
+		DEBUG(5, ("Could not find uid for name %s\n",
+			  state->username));
+		state->cont(state->private, False, 0);
+		return;
+	}
+
+	state->uid = uid;
+
+	id.uid = uid;
+	idmap_set_mapping_async(state->mem_ctx, &state->sid, id, ID_USERID,
+				sid2uid_set_mapping_recv, state);
+}
+
+static void sid2uid_set_mapping_recv(void *private, BOOL success)
+{
+	struct sid2uid_state *state =
+		talloc_get_type_abort(private, struct sid2uid_state);
+
+	if (!success) {
+		DEBUG(5, ("Could not set ID mapping for sid %s\n",
+			  sid_string_static(&state->sid)));
+		state->cont(state->private, False, 0);
+		return;
+	}
+
+	state->cont(state->private, True, state->uid);
+}
+
+struct sid2gid_state {
+	TALLOC_CTX *mem_ctx;
+	DOM_SID sid;
+	char *groupname;
+	gid_t gid;
+	void (*cont)(void *private, BOOL success, gid_t gid);
+	void *private;
+};
+
+static void sid2gid_lookup_sid_recv(void *private, BOOL success,
+				    const char *dom_name, const char *name,
+				    enum SID_NAME_USE type);
+static void sid2gid_noalloc_recv(void *private, BOOL success, gid_t gid);
+static void sid2gid_alloc_recv(void *private, BOOL success, gid_t gid);
+static void sid2gid_name2gid_recv(void *private, BOOL success, gid_t gid);
+static void sid2gid_set_mapping_recv(void *private, BOOL success);
+
+void winbindd_sid2gid_async(TALLOC_CTX *mem_ctx, const DOM_SID *sid,
+			    void (*cont)(void *private, BOOL success,
+					 gid_t gid),
+			    void *private)
+{
+	struct sid2gid_state *state;
+	NTSTATUS result;
+	gid_t gid;
+
+	if (idmap_proxyonly()) {
+		DEBUG(10, ("idmap proxy only\n"));
+		cont(private, False, 0);
+		return;
+	}
+
+	/* Query only the local tdb, everything else might possibly block */
+
+	result = idmap_sid_to_gid(sid, &gid, ID_QUERY_ONLY|ID_CACHE_ONLY);
+
+	if (NT_STATUS_IS_OK(result)) {
+		cont(private, True, gid);
+		return;
+	}
+
+	state = TALLOC_P(mem_ctx, struct sid2gid_state);
+	if (state == NULL) {
+		DEBUG(0, ("talloc failed\n"));
+		cont(private, False, 0);
+		return;
+	}
+
+	state->mem_ctx = mem_ctx;
+	state->sid = *sid;
+	state->cont = cont;
+	state->private = private;
+
+	/* Let's see if it's really a user before allocating a gid */
+
+	winbindd_lookupsid_async(mem_ctx, sid, sid2gid_lookup_sid_recv, state);
+}
+
+static void sid2gid_lookup_sid_recv(void *private, BOOL success,
+				    const char *dom_name, const char *name,
+				    enum SID_NAME_USE type)
+{
+	struct sid2gid_state *state =
+		talloc_get_type_abort(private, struct sid2gid_state);
+
+	if (!success) {
+		DEBUG(5, ("Could not trigger lookup_sid\n"));
+		state->cont(state->private, False, 0);
+		return;
+	}
+
+	if (((type != SID_NAME_DOM_GRP) && (type != SID_NAME_ALIAS) &&
+	     (type != SID_NAME_WKN_GRP))) {
+		DEBUG(5, ("SID is not a group\n"));
+		state->cont(state->private, False, 0);
+		return;
+	}
+
+	state->groupname = talloc_strdup(state->mem_ctx, name);
+
+	/* Ask the possibly blocking remote IDMAP and allocate  */
+
+	idmap_sid2gid_async(state->mem_ctx, &state->sid, False,
+			    sid2gid_noalloc_recv, state);
+}
+
+static void sid2gid_noalloc_recv(void *private, BOOL success, gid_t gid)
+{
+	struct sid2gid_state *state =
+		talloc_get_type_abort(private, struct sid2gid_state);
+
+	if (success) {
+		DEBUG(10, ("found gid for sid %s in remote backend\n",
+			   sid_string_static(&state->sid)));
+		state->cont(state->private, True, gid);
+		return;
+	}
+
+	if (lp_winbind_trusted_domains_only() && 
+	    (sid_compare_domain(&state->sid, &find_our_domain()->sid) == 0)) {
+		DEBUG(10, ("Trying to go via nss\n"));
+		winbindd_name2gid_async(state->mem_ctx, state->groupname,
+					sid2gid_name2gid_recv, state);
+		return;
+	}
+
+	/* To be done: Here we're going to try the unixinfo pipe */
+
+	/* Now allocate a gid */
+
+	idmap_sid2gid_async(state->mem_ctx, &state->sid, True,
+			    sid2gid_alloc_recv, state);
+}
+
+static void sid2gid_alloc_recv(void *private, BOOL success, gid_t gid)
+{
+	struct sid2gid_state *state =
+		talloc_get_type_abort(private, struct sid2gid_state);
+
+	if (!success) {
+		DEBUG(5, ("Could not allocate gid\n"));
+		state->cont(state->private, False, 0);
+		return;
+	}
+
+	state->cont(state->private, True, gid);
+}
+
+static void sid2gid_name2gid_recv(void *private, BOOL success, gid_t gid)
+{
+	struct sid2gid_state *state =
+		talloc_get_type_abort(private, struct sid2gid_state);
+	unid_t id;
+
+	if (!success) {
+		DEBUG(5, ("Could not find gid for name %s\n",
+			  state->groupname));
+		state->cont(state->private, False, 0);
+		return;
+	}
+
+	state->gid = gid;
+
+	id.gid = gid;
+	idmap_set_mapping_async(state->mem_ctx, &state->sid, id, ID_GROUPID,
+				sid2gid_set_mapping_recv, state);
+}
+
+static void sid2gid_set_mapping_recv(void *private, BOOL success)
+{
+	struct sid2gid_state *state =
+		talloc_get_type_abort(private, struct sid2gid_state);
+
+	if (!success) {
+		DEBUG(5, ("Could not set ID mapping for sid %s\n",
+			  sid_string_static(&state->sid)));
+		state->cont(state->private, False, 0);
+		return;
+	}
+
+	state->cont(state->private, True, state->gid);
+}
+
+static void query_user_recv(TALLOC_CTX *mem_ctx, BOOL success,
+			    struct winbindd_response *response,
+			    void *c, void *private)
+{
+	void (*cont)(void *priv, BOOL succ, const char *acct_name,
+		     const char *full_name, uint32 group_rid) = c;
+
+	if (!success) {
+		DEBUG(5, ("Could not trigger query_user\n"));
+		cont(private, False, NULL, NULL, -1);
+		return;
+	}
+
+	cont(private, True, response->data.user_info.acct_name,
+	     response->data.user_info.full_name,
+	     response->data.user_info.group_rid);
+}
+
+void query_user_async(TALLOC_CTX *mem_ctx, struct winbindd_domain *domain,
+		      const DOM_SID *sid,
+		      void (*cont)(void *private, BOOL success,
+				   const char *acct_name,
+				   const char *full_name,
+				   uint32 group_rid),
+		      void *private)
+{
+	struct winbindd_request request;
+	ZERO_STRUCT(request);
+	request.cmd = WINBINDD_DUAL_USERINFO;
+	sid_to_string(request.data.sid, sid);
+	do_async_domain(mem_ctx, domain, &request, query_user_recv,
+			cont, private);
+}
+