userman.c

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			    TALLOC_CTX *mem_ctx,
			    struct libnet_rpc_userdel *io)
{
	struct composite_context *c = libnet_rpc_userdel_send(p, io, NULL);
	return libnet_rpc_userdel_recv(c, mem_ctx, io);
}


/*
 * USER MODIFY functionality
 */

static void continue_usermod_name_found(struct rpc_request *req);
static void continue_usermod_user_opened(struct rpc_request *req);
static void continue_usermod_user_queried(struct rpc_request *req);
static void continue_usermod_user_changed(struct rpc_request *req);


struct usermod_state {
	struct dcerpc_pipe         *pipe;
	struct policy_handle       domain_handle;
	struct policy_handle       user_handle;
	struct usermod_change      change;
	union  samr_UserInfo       info;
	struct samr_LookupNames    lookupname;
	struct samr_OpenUser       openuser;
	struct samr_SetUserInfo    setuser;
	struct samr_QueryUserInfo  queryuser;

	/* information about the progress */
	void (*monitor_fn)(struct monitor_msg *);
};


/**
 * Step 1: Lookup user name
 */
static void continue_usermod_name_found(struct rpc_request *req)
{
	struct composite_context *c;
	struct usermod_state *s;
	struct rpc_request *openuser_req;
	struct monitor_msg msg;

	c = talloc_get_type(req->async.private_data, struct composite_context);
	s = talloc_get_type(c->private_data, struct usermod_state);

	/* receive samr_LookupNames result */
	c->status = dcerpc_ndr_request_recv(req);
	if (!composite_is_ok(c)) return;

	c->status = s->lookupname.out.result;
	if (!NT_STATUS_IS_OK(c->status)) {
		composite_error(c, c->status);
		return;
	}

	/* what to do when there's no user account to delete
	   and what if there's more than one rid resolved */
	if (!s->lookupname.out.rids.count) {
		c->status = NT_STATUS_NO_SUCH_USER;
		composite_error(c, c->status);
		return;

	} else if (!s->lookupname.out.rids.count > 1) {
		c->status = NT_STATUS_INVALID_ACCOUNT_NAME;
		composite_error(c, c->status);
		return;
	}

	/* issue a monitor message */
	if (s->monitor_fn) {
		struct msg_rpc_lookup_name msg_lookup;

		msg_lookup.rid   = s->lookupname.out.rids.ids;
		msg_lookup.count = s->lookupname.out.rids.count;

		msg.type      = mon_SamrLookupName;
		msg.data      = (void*)&msg_lookup;
		msg.data_size = sizeof(msg_lookup);
		s->monitor_fn(&msg);
	}

	/* prepare the next rpc call */
	s->openuser.in.domain_handle = &s->domain_handle;
	s->openuser.in.rid           = s->lookupname.out.rids.ids[0];
	s->openuser.in.access_mask   = SEC_FLAG_MAXIMUM_ALLOWED;
	s->openuser.out.user_handle  = &s->user_handle;

	/* send the rpc request */
	openuser_req = dcerpc_samr_OpenUser_send(s->pipe, c, &s->openuser);
	if (composite_nomem(openuser_req, c)) return;

	composite_continue_rpc(c, openuser_req, continue_usermod_user_opened, c);
}


/**
 * Choose a proper level of samr_UserInfo structure depending on required
 * change specified by means of flags field. Subsequent calls of this
 * function are made until there's no flags set meaning that all of the
 * changes have been made.
 */
static bool usermod_setfields(struct usermod_state *s, uint16_t *level,
			      union samr_UserInfo *i, bool queried)
{
	if (s->change.fields == 0) return s->change.fields;

	*level = 0;

	if ((s->change.fields & USERMOD_FIELD_ACCOUNT_NAME) &&
	    (*level == 0 || *level == 7)) {
		*level = 7;
		i->info7.account_name.string = s->change.account_name;
		
		s->change.fields ^= USERMOD_FIELD_ACCOUNT_NAME;
	}

	if ((s->change.fields & USERMOD_FIELD_FULL_NAME) &&
	    (*level == 0 || *level == 8)) {
		*level = 8;
		i->info8.full_name.string = s->change.full_name;
		
		s->change.fields ^= USERMOD_FIELD_FULL_NAME;
	}
	
	if ((s->change.fields & USERMOD_FIELD_DESCRIPTION) &&
	    (*level == 0 || *level == 13)) {
		*level = 13;
		i->info13.description.string = s->change.description;
		
		s->change.fields ^= USERMOD_FIELD_DESCRIPTION;		
	}

	if ((s->change.fields & USERMOD_FIELD_COMMENT) &&
	    (*level == 0 || *level == 2)) {
		*level = 2;
		
		if (queried) {
			/* the user info is obtained, so now set the required field */
			i->info2.comment.string = s->change.comment;
			s->change.fields ^= USERMOD_FIELD_COMMENT;
			
		} else {
			/* we need to query the user info before setting one field in it */
			return false;
		}
	}

	if ((s->change.fields & USERMOD_FIELD_LOGON_SCRIPT) &&
	    (*level == 0 || *level == 11)) {
		*level = 11;
		i->info11.logon_script.string = s->change.logon_script;
		
		s->change.fields ^= USERMOD_FIELD_LOGON_SCRIPT;
	}

	if ((s->change.fields & USERMOD_FIELD_PROFILE_PATH) &&
	    (*level == 0 || *level == 12)) {
		*level = 12;
		i->info12.profile_path.string = s->change.profile_path;
		
		s->change.fields ^= USERMOD_FIELD_PROFILE_PATH;
	}

	if ((s->change.fields & USERMOD_FIELD_HOME_DIRECTORY) &&
	    (*level == 0 || *level == 10)) {
		*level = 10;
		
		if (queried) {
			i->info10.home_directory.string = s->change.home_directory;
			s->change.fields ^= USERMOD_FIELD_HOME_DIRECTORY;
		} else {
			return false;
		}
	}

	if ((s->change.fields & USERMOD_FIELD_HOME_DRIVE) &&
	    (*level == 0 || *level == 10)) {
		*level = 10;
		
		if (queried) {
			i->info10.home_drive.string = s->change.home_drive;
			s->change.fields ^= USERMOD_FIELD_HOME_DRIVE;
		} else {
			return false;
		}
	}
	
	if ((s->change.fields & USERMOD_FIELD_ACCT_EXPIRY) &&
	    (*level == 0 || *level == 17)) {
		*level = 17;
		i->info17.acct_expiry = timeval_to_nttime(s->change.acct_expiry);
		
		s->change.fields ^= USERMOD_FIELD_ACCT_EXPIRY;
	}

	if ((s->change.fields & USERMOD_FIELD_ACCT_FLAGS) &&
	    (*level == 0 || *level == 16)) {
		*level = 16;
		i->info16.acct_flags = s->change.acct_flags;
		
		s->change.fields ^= USERMOD_FIELD_ACCT_FLAGS;
	}

	/* We're going to be here back again soon unless all fields have been set */
	return true;
}


static NTSTATUS usermod_change(struct composite_context *c,
			       struct usermod_state *s)
{
	struct rpc_request *query_req, *setuser_req;
	bool do_set;
	union samr_UserInfo *i = &s->info;

	/* set the level to invalid value, so that unless setfields routine 
	   gives it a valid value we report the error correctly */
	uint16_t level = 27;

	/* prepare UserInfo level and data based on bitmask field */
	do_set = usermod_setfields(s, &level, i, false);

	if (level < 1 || level > 26) {
		/* apparently there's a field that the setfields routine
		   does not know how to set */
		return NT_STATUS_INVALID_PARAMETER;
	}

	/* If some specific level is used to set user account data and the change
	   itself does not cover all fields then we need to query the user info
	   first, right before changing the data. Otherwise we could set required
	   fields and accidentally reset the others.
	*/
	if (!do_set) {
		s->queryuser.in.user_handle = &s->user_handle;
		s->queryuser.in.level       = level;

		/* send query user info request to retrieve complete data of
		   a particular info level */
		query_req = dcerpc_samr_QueryUserInfo_send(s->pipe, c, &s->queryuser);
		composite_continue_rpc(c, query_req, continue_usermod_user_queried, c);

	} else {
		s->setuser.in.user_handle  = &s->user_handle;
		s->setuser.in.level        = level;
		s->setuser.in.info         = i;

		/* send set user info request after making required change */
		setuser_req = dcerpc_samr_SetUserInfo_send(s->pipe, c, &s->setuser);
		composite_continue_rpc(c, setuser_req, continue_usermod_user_changed, c);
	}
	
	return NT_STATUS_OK;
}


/**
 * Stage 2: Open user account
 */
static void continue_usermod_user_opened(struct rpc_request *req)
{
	struct composite_context *c;
	struct usermod_state *s;

	c = talloc_get_type(req->async.private_data, struct composite_context);
	s = talloc_get_type(c->private_data, struct usermod_state);

	c->status = dcerpc_ndr_request_recv(req);
	if (!composite_is_ok(c)) return;

	c->status = s->openuser.out.result;
	if (!NT_STATUS_IS_OK(c->status)) {
		composite_error(c, c->status);
		return;
	}

	c->status = usermod_change(c, s);
}


/**
 * Stage 2a (optional): Query the user information
 */
static void continue_usermod_user_queried(struct rpc_request *req)
{
	struct composite_context *c;
	struct usermod_state *s;
	union samr_UserInfo *i;
	uint16_t level;
	struct rpc_request *setuser_req;
	
	c = talloc_get_type(req->async.private_data, struct composite_context);
	s = talloc_get_type(c->private_data, struct usermod_state);

	i = &s->info;

	/* receive samr_QueryUserInfo result */
	c->status = dcerpc_ndr_request_recv(req);
	if (!composite_is_ok(c)) return;

	c->status = s->queryuser.out.result;
	if (!NT_STATUS_IS_OK(c->status)) {
		composite_error(c, c->status);
		return;
	}

	/* get returned user data and make a change (potentially one
	   of many) */
	s->info = *s->queryuser.out.info;

	usermod_setfields(s, &level, i, true);

	/* prepare rpc call arguments */
	s->setuser.in.user_handle  = &s->user_handle;
	s->setuser.in.level        = level;
	s->setuser.in.info         = i;

	/* send the rpc request */
	setuser_req = dcerpc_samr_SetUserInfo_send(s->pipe, c, &s->setuser);
	composite_continue_rpc(c, setuser_req, continue_usermod_user_changed, c);
}


/**
 * Stage 3: Set new user account data
 */
static void continue_usermod_user_changed(struct rpc_request *req)
{
	struct composite_context *c;
	struct usermod_state *s;
	
	c = talloc_get_type(req->async.private_data, struct composite_context);
	s = talloc_get_type(c->private_data, struct usermod_state);

	/* receive samr_SetUserInfo result */
	c->status = dcerpc_ndr_request_recv(req);
	if (!composite_is_ok(c)) return;

	/* return the actual function call status */
	c->status = s->setuser.out.result;
	if (!NT_STATUS_IS_OK(c->status)) {
		composite_error(c, c->status);
		return;
	}

	if (s->change.fields == 0) {
		/* all fields have been set - we're done */
		composite_done(c);

	} else {
		/* something's still not changed - repeat the procedure */
		c->status = usermod_change(c, s);
	}
}


/**
 * Sends asynchronous usermod request
 *
 * @param p dce/rpc call pipe
 * @param io arguments and results of the call
 * @param monitor monitor function for providing information about the progress
 */

struct composite_context *libnet_rpc_usermod_send(struct dcerpc_pipe *p,
						  struct libnet_rpc_usermod *io,
						  void (*monitor)(struct monitor_msg*))
{
	struct composite_context *c;
	struct usermod_state *s;
	struct rpc_request *lookup_req;

	/* composite context allocation and setup */
	c = composite_create(p, dcerpc_event_context(p));
	if (c == NULL) return NULL;
	s = talloc_zero(c, struct usermod_state);
	if (composite_nomem(s, c)) return c;

	c->private_data = s;

	/* store parameters in the call structure */
	s->pipe          = p;
	s->domain_handle = io->in.domain_handle;
	s->change        = io->in.change;
	s->monitor_fn    = monitor;
	
	/* prepare rpc call arguments */
	s->lookupname.in.domain_handle = &io->in.domain_handle;
	s->lookupname.in.num_names     = 1;
	s->lookupname.in.names         = talloc_zero(s, struct lsa_String);
	s->lookupname.in.names->string = io->in.username;

	/* send the rpc request */
	lookup_req = dcerpc_samr_LookupNames_send(p, c, &s->lookupname);
	if (composite_nomem(lookup_req, c)) return c;
	
	/* callback handler setup */
	composite_continue_rpc(c, lookup_req, continue_usermod_name_found, c);
	return c;
}


/**
 * Waits for and receives results of asynchronous usermod call
 *
 * @param c composite context returned by asynchronous usermod call
 * @param mem_ctx memory context of the call
 * @param io pointer to results (and arguments) of the call
 * @return nt status code of execution
 */

NTSTATUS libnet_rpc_usermod_recv(struct composite_context *c, TALLOC_CTX *mem_ctx,
				 struct libnet_rpc_usermod *io)
{
	NTSTATUS status;
	
	status = composite_wait(c);

	talloc_free(c);
	return status;
}


/**
 * Synchronous version of usermod call
 *
 * @param pipe dce/rpc call pipe
 * @param mem_ctx memory context for the call
 * @param io arguments and results of the call
 * @return nt status code of execution
 */

NTSTATUS libnet_rpc_usermod(struct dcerpc_pipe *p,
			    TALLOC_CTX *mem_ctx,
			    struct libnet_rpc_usermod *io)
{
	struct composite_context *c = libnet_rpc_usermod_send(p, io, NULL);
	return libnet_rpc_usermod_recv(c, mem_ctx, io);
}