s3-lsasd: Create a lsa service daemon.

Signed-off-by: Andreas Schneider <asn@samba.org>
Signed-off-by: Simo Sorce <idra@samba.org>

1 files changed, 1034 insertions, 0 deletions

diff --git a/source3/rpc_server/lsasd.c b/source3/rpc_server/lsasd.c
new file mode 100644
index 0000000000..bb7fb789d5
--- /dev/null
+++ b/source3/rpc_server/lsasd.c
@@ -0,0 +1,1034 @@
+/*
+ *  Unix SMB/CIFS implementation.
+ *
+ *  LSA service daemon
+ *
+ *  Copyright (c) 2011      Andreas Schneider <asn@samba.org>
+ *
+ *  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 "serverid.h"
+#include "messages.h"
+#include "ntdomain.h"
+
+#include "../lib/tsocket/tsocket.h"
+#include "lib/server_prefork.h"
+#include "librpc/rpc/dcerpc_ep.h"
+
+#include "rpc_server/rpc_server.h"
+#include "rpc_server/rpc_ep_register.h"
+#include "rpc_server/rpc_sock_helper.h"
+
+#include "librpc/gen_ndr/srv_lsa.h"
+#include "librpc/gen_ndr/srv_samr.h"
+#include "librpc/gen_ndr/srv_netlogon.h"
+
+#define DAEMON_NAME "lsasd"
+
+#define LSASD_MIN_CHILDREN 5
+#define LSASD_MAX_CHILDREN 25
+#define LSASD_SPAWN_RATE   5
+#define LSASD_MIN_LIFE     60 /* 1 minute minimum life time */
+
+#define LSASD_MAX_SOCKETS 64
+
+#define LSASD_ALL_FINE 0x00
+#define LSASD_NEW_MAX  0x01
+#define LSASD_ENOSPC   0x02
+
+static int lsasd_min_children;
+static int lsasd_max_children;
+static int lsasd_spawn_rate;
+static int lsasd_prefork_status;
+
+void start_lsasd(struct tevent_context *ev_ctx,
+		 struct messaging_context *msg_ctx);
+
+static void lsasd_prefork_config(void)
+{
+	static int lsasd_prefork_config_init = false;
+	const char *prefork_str;
+	int min, max, rate;
+	bool use_defaults = false;
+	int ret;
+
+	if (!lsasd_prefork_config_init) {
+		lsasd_prefork_status = LSASD_ALL_FINE;
+		lsasd_min_children = 0;
+		lsasd_max_children = 0;
+		lsasd_spawn_rate = 0;
+		lsasd_prefork_config_init = true;
+	}
+
+	prefork_str = lp_parm_const_string(GLOBAL_SECTION_SNUM,
+					   "lsasd", "prefork", "none");
+	if (strcmp(prefork_str, "none") == 0) {
+		use_defaults = true;
+	} else {
+		ret = sscanf(prefork_str, "%d:%d:%d", &min, &max, &rate);
+		if (ret != 3) {
+			DEBUG(0, ("invalid format for lsasd:prefork!\n"));
+			use_defaults = true;
+		}
+	}
+
+	if (use_defaults) {
+		min = LSASD_MIN_CHILDREN;
+		max = LSASD_MAX_CHILDREN;
+		rate = LSASD_SPAWN_RATE;
+	}
+
+	if (max > lsasd_max_children && lsasd_max_children != 0) {
+		lsasd_prefork_status |= LSASD_NEW_MAX;
+	}
+
+	lsasd_min_children = min;
+	lsasd_max_children = max;
+	lsasd_spawn_rate = rate;
+}
+
+static void lsasd_reopen_logs(int child_id)
+{
+	char *lfile = lp_logfile();
+	char *extension;
+	int rc;
+
+	if (child_id) {
+		rc = asprintf(&extension, "%s.%d", DAEMON_NAME, child_id);
+	} else {
+		rc = asprintf(&extension, "%s", DAEMON_NAME);
+	}
+	if (rc == -1) {
+		return;
+	}
+
+	rc = 0;
+	if (lfile == NULL || lfile[0] == '\0') {
+		rc = asprintf(&lfile, "%s/log.%s",
+			      get_dyn_LOGFILEBASE(), extension);
+	} else {
+		if (strstr(lfile, extension) == NULL) {
+			if (child_id) {
+				rc = asprintf(&lfile, "%s.%d",
+						lp_logfile(),
+						child_id);
+			} else {
+				rc = asprintf(&lfile, "%s.%s",
+						lp_logfile(),
+						extension);
+			}
+		}
+	}
+
+	if (rc > 0) {
+		lp_set_logfile(lfile);
+		SAFE_FREE(lfile);
+	}
+
+	SAFE_FREE(extension);
+
+	reopen_logs();
+}
+
+static void lsasd_smb_conf_updated(struct messaging_context *msg,
+				  void *private_data,
+				  uint32_t msg_type,
+				  struct server_id server_id,
+				  DATA_BLOB *data)
+{
+	DEBUG(10, ("Got message saying smb.conf was updated. Reloading.\n"));
+	change_to_root_user();
+	lp_load(get_dyn_CONFIGFILE(), true, false, false, true);
+
+	lsasd_reopen_logs(0);
+	lsasd_prefork_config();
+}
+
+static void lsasd_sig_term_handler(struct tevent_context *ev,
+				  struct tevent_signal *se,
+				  int signum,
+				  int count,
+				  void *siginfo,
+				  void *private_data)
+{
+	rpc_netlogon_shutdown();
+	rpc_samr_shutdown();
+	rpc_lsarpc_shutdown();
+
+	DEBUG(0, ("termination signal\n"));
+	exit(0);
+}
+
+static void lsasd_setup_sig_term_handler(struct tevent_context *ev_ctx)
+{
+	struct tevent_signal *se;
+
+	se = tevent_add_signal(ev_ctx,
+			       ev_ctx,
+			       SIGTERM, 0,
+			       lsasd_sig_term_handler,
+			       NULL);
+	if (!se) {
+		DEBUG(0, ("failed to setup SIGTERM handler\n"));
+		exit(1);
+	}
+}
+
+struct lsasd_hup_ctx {
+	struct messaging_context *msg_ctx;
+	struct prefork_pool *pfp;
+};
+
+static void lsasd_sig_hup_handler(struct tevent_context *ev,
+				    struct tevent_signal *se,
+				    int signum,
+				    int count,
+				    void *siginfo,
+				    void *pvt)
+{
+	struct lsasd_hup_ctx *hup_ctx;
+
+	hup_ctx = talloc_get_type_abort(pvt, struct lsasd_hup_ctx);
+
+	change_to_root_user();
+	lp_load(get_dyn_CONFIGFILE(), true, false, false, true);
+
+	lsasd_reopen_logs(0);
+	lsasd_prefork_config();
+
+	/* relay to all children */
+	prefork_send_signal_to_all(hup_ctx->pfp, SIGHUP);
+}
+
+static void lsasd_setup_sig_hup_handler(struct tevent_context *ev_ctx,
+					struct prefork_pool *pfp,
+					struct messaging_context *msg_ctx)
+{
+	struct lsasd_hup_ctx *hup_ctx;
+	struct tevent_signal *se;
+
+	hup_ctx = talloc(ev_ctx, struct lsasd_hup_ctx);
+	if (!hup_ctx) {
+		DEBUG(0, ("failed to setup SIGHUP handler\n"));
+		exit(1);
+	}
+	hup_ctx->pfp = pfp;
+	hup_ctx->msg_ctx = msg_ctx;
+
+	se = tevent_add_signal(ev_ctx,
+			       ev_ctx,
+			       SIGHUP, 0,
+			       lsasd_sig_hup_handler,
+			       hup_ctx);
+	if (!se) {
+		DEBUG(0, ("failed to setup SIGHUP handler\n"));
+		exit(1);
+	}
+}
+
+/**********************************************************
+ * Children
+ **********************************************************/
+
+struct lsasd_chld_sig_hup_ctx {
+	struct messaging_context *msg_ctx;
+	struct pf_worker_data *pf;
+	int child_id;
+};
+
+static void lsasd_chld_sig_hup_handler(struct tevent_context *ev,
+					 struct tevent_signal *se,
+					 int signum,
+					 int count,
+					 void *siginfo,
+					 void *pvt)
+{
+	struct lsasd_chld_sig_hup_ctx *shc;
+
+	shc = talloc_get_type_abort(pvt, struct lsasd_chld_sig_hup_ctx);
+
+	/* avoid wasting CPU cycles if we are going to exit soon anyways */
+	if (shc->pf != NULL &&
+	    shc->pf->cmds == PF_SRV_MSG_EXIT) {
+		return;
+	}
+
+	change_to_root_user();
+	lsasd_reopen_logs(shc->child_id);
+}
+
+static bool lsasd_setup_chld_hup_handler(struct tevent_context *ev_ctx,
+					 struct pf_worker_data *pf,
+					 struct messaging_context *msg_ctx,
+					 int child_id)
+{
+	struct lsasd_chld_sig_hup_ctx *shc;
+	struct tevent_signal *se;
+
+	shc = talloc(ev_ctx, struct lsasd_chld_sig_hup_ctx);
+	if (!shc) {
+		DEBUG(1, ("failed to setup SIGHUP handler"));
+		return false;
+	}
+	shc->child_id = child_id;
+	shc->pf = pf;
+	shc->msg_ctx = msg_ctx;
+
+	se = tevent_add_signal(ev_ctx,
+			       ev_ctx,
+			       SIGHUP, 0,
+			       lsasd_chld_sig_hup_handler,
+			       shc);
+	if (!se) {
+		DEBUG(1, ("failed to setup SIGHUP handler"));
+		return false;
+	}
+
+	return true;
+}
+
+static bool lsasd_child_init(struct tevent_context *ev_ctx,
+			     int child_id,
+			     struct pf_worker_data *pf)
+{
+	NTSTATUS status;
+	struct messaging_context *msg_ctx = server_messaging_context();
+	bool ok;
+
+	status = reinit_after_fork(msg_ctx, ev_ctx,
+				   procid_self(), true);
+	if (!NT_STATUS_IS_OK(status)) {
+		DEBUG(0,("reinit_after_fork() failed\n"));
+		smb_panic("reinit_after_fork() failed");
+	}
+
+	lsasd_reopen_logs(child_id);
+
+	ok = lsasd_setup_chld_hup_handler(ev_ctx, pf, msg_ctx, child_id);
+	if (!ok) {
+		return false;
+	}
+
+	if (!serverid_register(procid_self(), FLAG_MSG_GENERAL)) {
+		return false;
+	}
+
+	messaging_register(msg_ctx, ev_ctx,
+			   MSG_SMB_CONF_UPDATED, lsasd_smb_conf_updated);
+
+	status = rpc_lsarpc_init(NULL);
+	if (!NT_STATUS_IS_OK(status)) {
+		DEBUG(0, ("Failed to register lsarpc rpc inteface! (%s)\n",
+			  nt_errstr(status)));
+		return false;
+	}
+
+	status = rpc_samr_init(NULL);
+	if (!NT_STATUS_IS_OK(status)) {
+		DEBUG(0, ("Failed to register samr rpc inteface! (%s)\n",
+			  nt_errstr(status)));
+		return false;
+	}
+
+	status = rpc_netlogon_init(NULL);
+	if (!NT_STATUS_IS_OK(status)) {
+		DEBUG(0, ("Failed to register netlogon rpc inteface! (%s)\n",
+			  nt_errstr(status)));
+		return false;
+	}
+
+	return true;
+}
+
+struct lsasd_children_data {
+	struct tevent_context *ev_ctx;
+	struct messaging_context *msg_ctx;
+	int child_id;
+	struct pf_worker_data *pf;
+	int listen_fd_size;
+	int *listen_fds;
+	int lock_fd;
+
+	bool listening;
+};
+
+static void lsasd_next_client(void *pvt);
+
+static int lsasd_children_main(struct tevent_context *ev_ctx,
+			       struct messaging_context *msg_ctx,
+			       struct pf_worker_data *pf,
+			       int child_id,
+			       int listen_fd_size,
+			       int *listen_fds,
+			       int lock_fd,
+			       void *private_data)
+{
+	struct lsasd_children_data *data;
+	bool ok;
+	int ret;
+
+	ok = lsasd_child_init(ev_ctx, child_id, pf);
+	if (!ok) {
+		return 1;
+	}
+
+	data = talloc(ev_ctx, struct lsasd_children_data);
+	if (!data) {
+		return 1;
+	}
+	data->child_id = child_id;
+	data->pf = pf;
+	data->ev_ctx = ev_ctx;
+	data->msg_ctx = msg_ctx;
+	data->lock_fd = lock_fd;
+	data->listen_fd_size = listen_fd_size;
+	data->listen_fds = listen_fds;
+	data->listening = false;
+
+	/* loop until it is time to exit */
+	while (pf->status != PF_WORKER_EXITING) {
+		/* try to see if it is time to schedule the next client */
+		lsasd_next_client(data);
+
+		ret = tevent_loop_once(ev_ctx);
+		if (ret != 0) {
+			DEBUG(0, ("tevent_loop_once() exited with %d: %s\n",
+				  ret, strerror(errno)));
+			pf->status = PF_WORKER_EXITING;
+		}
+	}
+
+	return ret;
+}
+
+static void lsasd_client_terminated(void *pvt)
+{
+	struct lsasd_children_data *data;
+
+	data = talloc_get_type_abort(pvt, struct lsasd_children_data);
+
+	if (data->pf->num_clients) {
+		data->pf->num_clients--;
+	} else {
+		DEBUG(2, ("Invalid num clients, aborting!\n"));
+		data->pf->status = PF_WORKER_EXITING;
+		return;
+	}
+
+	lsasd_next_client(pvt);
+}
+
+struct lsasd_new_client {
+	struct lsasd_children_data *data;
+};
+
+static void lsasd_handle_client(struct tevent_req *req);
+
+static void lsasd_next_client(void *pvt)
+{
+	struct tevent_req *req;
+	struct lsasd_children_data *data;
+	struct lsasd_new_client *next;
+
+	data = talloc_get_type_abort(pvt, struct lsasd_children_data);
+
+	if (data->pf->num_clients == 0) {
+		data->pf->status = PF_WORKER_IDLE;
+	}
+
+	if (data->pf->cmds == PF_SRV_MSG_EXIT) {
+		DEBUG(2, ("Parent process commands we terminate!\n"));
+		return;
+	}
+
+	if (data->listening ||
+	    data->pf->num_clients >= data->pf->allowed_clients) {
+		/* nothing to do for now we are already listening
+		 * or reached the number of clients we are allowed
+		 * to handle in parallel */
+		return;
+	}
+
+	next = talloc_zero(data, struct lsasd_new_client);
+	if (!next) {
+		DEBUG(1, ("Out of memory!?\n"));
+		return;
+	}
+	next->data = data;
+
+	req = prefork_listen_send(next,
+				  data->ev_ctx,
+				  data->pf,
+				  data->listen_fd_size,
+				  data->listen_fds,
+				  data->lock_fd);
+	if (!req) {
+		DEBUG(1, ("Failed to make listening request!?\n"));
+		talloc_free(next);
+		return;
+	}
+	tevent_req_set_callback(req, lsasd_handle_client, next);
+
+	data->listening = true;
+}
+
+static void lsasd_handle_client(struct tevent_req *req)
+{
+	struct lsasd_children_data *data;
+	struct lsasd_new_client *client;
+	int rc;
+	int sd;
+	TALLOC_CTX *tmp_ctx;
+	struct tsocket_address *srv_addr;
+	struct tsocket_address *cli_addr;
+
+	client = tevent_req_callback_data(req, struct lsasd_new_client);
+	data = client->data;
+
+	tmp_ctx = talloc_stackframe();
+	if (tmp_ctx == NULL) {
+		DEBUG(1, ("Failed to allocate stackframe!\n"));
+		return;
+	}
+
+	rc = prefork_listen_recv(req,
+				 tmp_ctx,
+				 &sd,
+				 &srv_addr,
+				 &cli_addr);
+
+	/* this will free the request too */
+	talloc_free(client);
+	/* we are done listening */
+	data->listening = false;
+
+	if (rc > 0) {
+		DEBUG(1, ("Failed to accept client connection!\n"));
+		/* bail out if we are not serving any other client */
+		if (data->pf->num_clients == 0) {
+			data->pf->status = PF_WORKER_EXITING;
+		}
+		return;
+	}
+
+	if (rc == -2) {
+		DEBUG(1, ("Server asks us to die!\n"));
+		data->pf->status = PF_WORKER_EXITING;
+		return;
+	}
+
+	DEBUG(2, ("LSASD preforked child %d got client connection!\n",
+		  (int)(data->pf->pid)));
+
+	if (tsocket_address_is_inet(srv_addr, "ip")) {
+		DEBUG(3, ("Got a tcpip client connection from %s on inteface %s\n",
+			   tsocket_address_string(cli_addr, tmp_ctx),
+			   tsocket_address_string(srv_addr, tmp_ctx)));
+
+		dcerpc_ncacn_accept(data->ev_ctx,
+				    data->msg_ctx,
+				    NCACN_IP_TCP,
+				    "IP",
+				    cli_addr,
+				    srv_addr,
+				    sd,
+				    NULL);
+	} else if (tsocket_address_is_unix(srv_addr)) {
+		char *p;
+
+		p = tsocket_address_unix_path(srv_addr, tmp_ctx);
+		if (p == NULL) {
+			talloc_free(tmp_ctx);
+			return;
+		}
+
+		if (strstr(p, "/np/")) {
+			p = basename(p);
+
+			named_pipe_accept_function(data->ev_ctx,
+						   data->msg_ctx,
+						   p,
+						   sd,
+						   lsasd_client_terminated,
+						   data);
+		} else {
+			p = basename(p);
+
+			dcerpc_ncacn_accept(data->ev_ctx,
+					    data->msg_ctx,
+					    NCALRPC,
+					    p,
+					    cli_addr,
+					    srv_addr,
+					    sd,
+					    NULL);
+		}
+	} else {
+		DEBUG(0, ("ERROR: Unsupported socket!\n"));
+	}
+
+	talloc_free(tmp_ctx);
+}
+
+/*
+ * MAIN
+ */
+
+static bool lsasd_schedule_check(struct tevent_context *ev_ctx,
+				 struct messaging_context *msg_ctx,
+				 struct prefork_pool *pfp,
+				 struct timeval current_time);
+
+static void lsasd_check_children(struct tevent_context *ev_ctx,
+				    struct tevent_timer *te,
+				    struct timeval current_time,
+				    void *pvt);
+
+static void lsasd_sigchld_handler(struct tevent_context *ev_ctx,
+				  struct prefork_pool *pfp,
+				  void *pvt)
+{
+	struct messaging_context *msg_ctx;
+	int active, total;
+	int n, r;
+
+	msg_ctx = talloc_get_type_abort(pvt, struct messaging_context);
+
+	/* now check we do not descend below the minimum */
+	active = prefork_count_active_children(pfp, &total);
+
+	n = 0;
+	if (total < lsasd_min_children) {
+		n = total - lsasd_min_children;
+	} else if (total - active < (total / 4)) {
+		n = lsasd_min_children;
+	}
+
+	if (n > 0) {
+		r = prefork_add_children(ev_ctx, msg_ctx, pfp, n);
+		if (r < n) {
+			DEBUG(10, ("Tried to start %d children but only,"
+				   "%d were actually started.!\n", n, r));
+		}
+	}
+}
+
+static bool lsasd_setup_children_monitor(struct tevent_context *ev_ctx,
+					 struct messaging_context *msg_ctx,
+					 struct prefork_pool *pfp)
+{
+	bool ok;
+
+	/* add our oun sigchld callback */
+	prefork_set_sigchld_callback(pfp, lsasd_sigchld_handler, msg_ctx);
+
+	ok = lsasd_schedule_check(ev_ctx,
+				  msg_ctx,
+				  pfp,
+				  tevent_timeval_current());
+
+	return ok;
+}
+
+struct schedule_check_state {
+	struct messaging_context *msg_ctx;
+	struct prefork_pool *pfp;
+};
+
+static bool lsasd_schedule_check(struct tevent_context *ev_ctx,
+				 struct messaging_context *msg_ctx,
+				 struct prefork_pool *pfp,
+				 struct timeval current_time)
+{
+	struct tevent_timer *te;
+	struct timeval next_event;
+	struct schedule_check_state *state;
+
+	state = talloc(ev_ctx, struct schedule_check_state);
+	if (!state) {
+		DEBUG(0, ("Out of memory!\n"));
+		return false;
+	}
+	state->msg_ctx = msg_ctx;
+	state->pfp = pfp;
+
+	/* check situation again in 10 seconds */
+	next_event = tevent_timeval_current_ofs(10, 0);
+
+	/* TODO: check when the socket becomes readable, so that children
+	 * are checked only when there is some activity ? */
+	te = tevent_add_timer(ev_ctx,
+			      pfp,
+			      next_event,
+			      lsasd_check_children,
+			      state);
+	if (!te) {
+		DEBUG(2, ("Failed to set up children monitoring!\n"));
+		talloc_free(state);
+		return false;
+	}
+	talloc_steal(te, state);
+
+	return true;
+}
+
+static void lsasd_check_children(struct tevent_context *ev_ctx,
+				 struct tevent_timer *te,
+				 struct timeval current_time,
+				 void *pvt)
+{
+	struct schedule_check_state *state;
+	int active, total;
+	int rc, n;
+	bool ok;
+
+	state = talloc_get_type_abort(pvt, struct schedule_check_state);
+
+	if ((lsasd_prefork_status & LSASD_NEW_MAX) &&
+	    !(lsasd_prefork_status & LSASD_ENOSPC)) {
+		rc = prefork_expand_pool(state->pfp, lsasd_max_children);
+		if (rc == ENOSPC) {
+			lsasd_prefork_status |= LSASD_ENOSPC;
+		}
+		lsasd_prefork_status &= ~LSASD_NEW_MAX;
+	}
+
+	active = prefork_count_active_children(state->pfp, &total);
+
+	if (total - active < lsasd_spawn_rate) {
+		n = prefork_add_children(ev_ctx,
+					 state->msg_ctx,
+					 state->pfp,
+					 lsasd_spawn_rate);
+		if (n < lsasd_spawn_rate) {
+			DEBUG(10, ("Tried to start 5 children but only,"
+				   "%d were actually started.!\n", n));
+		}
+	}
+
+	if (total - active > lsasd_min_children) {
+		if ((total - lsasd_min_children) >= lsasd_spawn_rate) {
+			prefork_retire_children(state->pfp,
+						lsasd_spawn_rate,
+						time(NULL) - LSASD_MIN_LIFE);
+		}
+	}
+
+	ok = lsasd_schedule_check(ev_ctx,
+				  state->msg_ctx,
+				  state->pfp,
+				  current_time);
+}
+
+/*
+ * start it up
+ */
+
+static bool lsasd_create_sockets(struct tevent_context *ev_ctx,
+				 struct messaging_context *msg_ctx,
+				 int *listen_fd,
+				 int *listen_fd_size)
+{
+	struct dcerpc_binding_vector *v, *v_orig;
+	TALLOC_CTX *tmp_ctx;
+	NTSTATUS status;
+	uint32_t i;
+	int fd;
+	int rc;
+	bool ok = true;
+
+	tmp_ctx = talloc_stackframe();
+	if (tmp_ctx == NULL) {
+		return false;
+	}
+
+	status = dcerpc_binding_vector_new(tmp_ctx, &v_orig);
+	if (!NT_STATUS_IS_OK(status)) {
+		ok = false;
+		goto done;
+	}
+
+	/* Create only one tcpip listener for all services */
+	status = rpc_create_tcpip_sockets(&ndr_table_lsarpc,
+					  v_orig,
+					  0,
+					  listen_fd,
+					  listen_fd_size);
+	if (!NT_STATUS_IS_OK(status)) {
+		ok = false;
+		goto done;
+	}
+
+	/* Start to listen on tcpip sockets */
+	for (i = 0; i < *listen_fd_size; i++) {
+		rc = listen(listen_fd[i], lsasd_max_children);
+		if (rc == -1) {
+			DEBUG(0, ("Failed to listen on tcpip socket - %s\n",
+				  strerror(errno)));
+			ok = false;
+			goto done;
+		}
+	}
+
+	/* LSARPC */
+	fd = create_named_pipe_socket("lsarpc");
+	if (fd < 0) {
+		ok = false;
+		goto done;
+	}
+	listen_fd[*listen_fd_size] = fd;
+	(*listen_fd_size)++;
+
+	rc = listen(fd, lsasd_max_children);
+	if (rc == -1) {
+		DEBUG(0, ("Failed to listen on lsarpc pipe - %s\n",
+			  strerror(errno)));
+		ok = false;
+		goto done;
+	}
+
+	v = dcerpc_binding_vector_dup(tmp_ctx, v_orig);
+	if (v == NULL) {
+		ok = false;
+		goto done;
+	}
+
+	status = dcerpc_binding_vector_replace_iface(&ndr_table_lsarpc, v);
+	if (!NT_STATUS_IS_OK(status)) {
+		return false;
+	}
+
+	status = dcerpc_binding_vector_add_np_default(&ndr_table_lsarpc, v);
+	if (!NT_STATUS_IS_OK(status)) {
+		ok = false;
+		goto done;
+	}
+
+	status = rpc_ep_register(ev_ctx, msg_ctx, &ndr_table_lsarpc, v);
+	if (!NT_STATUS_IS_OK(status)) {
+		ok = false;
+		goto done;
+	}
+
+	/* SAMR */
+	fd = create_named_pipe_socket("samr");
+	if (fd < 0) {
+		ok = false;
+		goto done;
+	}
+
+	rc = listen(fd, lsasd_max_children);
+	if (rc == -1) {
+		DEBUG(0, ("Failed to listen on samr pipe - %s\n",
+			  strerror(errno)));
+		ok = false;
+		goto done;
+	}
+	listen_fd[*listen_fd_size] = fd;
+	(*listen_fd_size)++;
+
+	v = dcerpc_binding_vector_dup(tmp_ctx, v_orig);
+	if (v == NULL) {
+		ok = false;
+		goto done;
+	}
+
+	status = dcerpc_binding_vector_replace_iface(&ndr_table_samr, v);
+	if (!NT_STATUS_IS_OK(status)) {
+		return false;
+	}
+
+	status = dcerpc_binding_vector_add_np_default(&ndr_table_samr, v);
+	if (!NT_STATUS_IS_OK(status)) {
+		ok = false;
+		goto done;
+	}
+
+	status = rpc_ep_register(ev_ctx, msg_ctx, &ndr_table_samr, v);
+	if (!NT_STATUS_IS_OK(status)) {
+		ok = false;
+		goto done;
+	}
+
+	/* NETLOGON */
+	fd = create_named_pipe_socket("netlogon");
+	if (fd < 0) {
+		ok = false;
+		goto done;
+	}
+
+	rc = listen(fd, lsasd_max_children);
+	if (rc == -1) {
+		DEBUG(0, ("Failed to listen on samr pipe - %s\n",
+			  strerror(errno)));
+		ok = false;
+		goto done;
+	}
+	listen_fd[*listen_fd_size] = fd;
+	(*listen_fd_size)++;
+
+	v = dcerpc_binding_vector_dup(tmp_ctx, v_orig);
+	if (v == NULL) {
+		ok = false;
+		goto done;
+	}
+
+	status = dcerpc_binding_vector_replace_iface(&ndr_table_netlogon, v);
+	if (!NT_STATUS_IS_OK(status)) {
+		return false;
+	}
+
+	status = dcerpc_binding_vector_add_np_default(&ndr_table_netlogon, v);
+	if (!NT_STATUS_IS_OK(status)) {
+		ok = false;
+		goto done;
+	}
+
+	status = rpc_ep_register(ev_ctx, msg_ctx, &ndr_table_netlogon, v);
+	if (!NT_STATUS_IS_OK(status)) {
+		ok = false;
+		goto done;
+	}
+
+done:
+	talloc_free(tmp_ctx);
+	return ok;
+}
+
+void start_lsasd(struct tevent_context *ev_ctx,
+		 struct messaging_context *msg_ctx)
+{
+	struct prefork_pool *pool;
+	NTSTATUS status;
+	int listen_fd[LSASD_MAX_SOCKETS];
+	int listen_fd_size = 0;
+	pid_t pid;
+	int rc;
+	bool ok;
+
+	DEBUG(1, ("Forking LSA Service Daemon\n"));
+
+	/*
+	 * Block signals before forking child as it will have to
+	 * set its own handlers. Child will re-enable SIGHUP as
+	 * soon as the handlers are set up.
+	 */
+	BlockSignals(true, SIGTERM);
+	BlockSignals(true, SIGHUP);
+
+	pid = sys_fork();
+	if (pid == -1) {
+		DEBUG(0, ("Failed to fork LSASD [%s], aborting ...\n",
+			   strerror(errno)));
+		exit(1);
+	}
+
+	/* parent or error */
+	if (pid != 0) {
+
+		/* Re-enable SIGHUP before returnig */
+		BlockSignals(false, SIGTERM);
+		BlockSignals(false, SIGHUP);
+
+		return;
+	}
+
+	/* child */
+	close_low_fds(false);
+
+	status = reinit_after_fork(msg_ctx,
+				   ev_ctx,
+				   procid_self(), true);
+	if (!NT_STATUS_IS_OK(status)) {
+		DEBUG(0,("reinit_after_fork() failed\n"));
+		smb_panic("reinit_after_fork() failed");
+	}
+
+	lsasd_reopen_logs(0);
+	lsasd_prefork_config();
+
+	lsasd_setup_sig_term_handler(ev_ctx);
+	lsasd_setup_sig_hup_handler(ev_ctx, pool, msg_ctx);
+
+	BlockSignals(false, SIGTERM);
+	BlockSignals(false, SIGHUP);
+
+	ok = lsasd_create_sockets(ev_ctx, msg_ctx, listen_fd, &listen_fd_size);
+	if (!ok) {
+		exit(1);
+	}
+
+	/* start children before any more initialization is done */
+	ok = prefork_create_pool(ev_ctx, /* mem_ctx */
+				 ev_ctx,
+				 msg_ctx,
+				 listen_fd_size,
+				 listen_fd,
+				 lsasd_min_children,
+				 lsasd_max_children,
+				 &lsasd_children_main,
+				 NULL,
+				 &pool);
+	if (!ok) {
+		exit(1);
+	}
+
+	if (!serverid_register(procid_self(), FLAG_MSG_GENERAL)) {
+		exit(1);
+	}
+
+	messaging_register(msg_ctx,
+			   ev_ctx,
+			   MSG_SMB_CONF_UPDATED,
+			   lsasd_smb_conf_updated);
+
+	status = rpc_lsarpc_init(NULL);
+	if (!NT_STATUS_IS_OK(status)) {
+		DEBUG(0, ("Failed to register winreg rpc inteface! (%s)\n",
+			  nt_errstr(status)));
+		exit(1);
+	}
+
+	status = rpc_samr_init(NULL);
+	if (!NT_STATUS_IS_OK(status)) {
+		DEBUG(0, ("Failed to register lsasd rpc inteface! (%s)\n",
+			  nt_errstr(status)));
+		exit(1);
+	}
+
+	status = rpc_netlogon_init(NULL);
+	if (!NT_STATUS_IS_OK(status)) {
+		DEBUG(0, ("Failed to register lsasd rpc inteface! (%s)\n",
+			  nt_errstr(status)));
+		exit(1);
+	}
+
+	ok = lsasd_setup_children_monitor(ev_ctx, msg_ctx, pool);
+	if (!ok) {
+		DEBUG(0, ("Failed to setup children monitoring!\n"));
+		exit(1);
+	}
+
+	DEBUG(1, ("LSASD Daemon Started (%d)\n", getpid()));
+
+	/* loop forever */
+	rc = tevent_loop_wait(ev_ctx);
+
+	/* should not be reached */
+	DEBUG(0,("background_queue: tevent_loop_wait() exited with %d - %s\n",
+		 rc, (rc == 0) ? "out of events" : strerror(errno)));
+	exit(1);
+}