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https://github.com/samba-team/samba.git
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da47e13323
With modern messaging this doesn't do anything (it's an empty destructor). Clean up so we can add a proper destructor in future. Signed-off-by: Jeremy Allison <jra@samba.org> Reviewed-by: Andrew Bartlett <abartlet@samba.org>
1820 lines
46 KiB
C
1820 lines
46 KiB
C
/*
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Unix SMB/CIFS implementation.
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Winbind daemon for ntdom nss module
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Copyright (C) by Tim Potter 2000-2002
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Copyright (C) Andrew Tridgell 2002
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Copyright (C) Jelmer Vernooij 2003
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Copyright (C) Volker Lendecke 2004
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 3 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include "includes.h"
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#include "popt_common.h"
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#include "winbindd.h"
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#include "nsswitch/winbind_client.h"
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#include "nsswitch/wb_reqtrans.h"
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#include "ntdomain.h"
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#include "../librpc/gen_ndr/srv_lsa.h"
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#include "../librpc/gen_ndr/srv_samr.h"
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#include "secrets.h"
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#include "rpc_client/cli_netlogon.h"
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#include "idmap.h"
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#include "lib/addrchange.h"
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#include "serverid.h"
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#include "auth.h"
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#include "messages.h"
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#include "../lib/util/pidfile.h"
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#include "util_cluster.h"
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#include "source4/lib/messaging/irpc.h"
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#include "source4/lib/messaging/messaging.h"
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#include "lib/param/param.h"
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#include "lib/async_req/async_sock.h"
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#undef DBGC_CLASS
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#define DBGC_CLASS DBGC_WINBIND
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#define SCRUB_CLIENTS_INTERVAL 5
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static bool client_is_idle(struct winbindd_cli_state *state);
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static void remove_client(struct winbindd_cli_state *state);
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static void winbindd_setup_max_fds(void);
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static bool opt_nocache = False;
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static bool interactive = False;
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extern bool override_logfile;
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struct tevent_context *winbind_event_context(void)
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{
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static struct tevent_context *ev = NULL;
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if (ev != NULL) {
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return ev;
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}
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/*
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* Note we MUST use the NULL context here, not the autofree context,
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* to avoid side effects in forked children exiting.
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*/
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ev = samba_tevent_context_init(NULL);
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if (ev == NULL) {
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smb_panic("Could not init winbindd's messaging context.\n");
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}
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return ev;
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}
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struct messaging_context *winbind_messaging_context(void)
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{
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static struct messaging_context *msg = NULL;
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if (msg != NULL) {
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return msg;
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}
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/*
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* Note we MUST use the NULL context here, not the autofree context,
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* to avoid side effects in forked children exiting.
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*/
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msg = messaging_init(NULL, winbind_event_context());
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if (msg == NULL) {
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smb_panic("Could not init winbindd's messaging context.\n");
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}
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return msg;
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}
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struct imessaging_context *winbind_imessaging_context(void)
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{
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static struct imessaging_context *msg = NULL;
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struct messaging_context *msg_ctx;
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struct server_id myself;
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struct loadparm_context *lp_ctx;
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if (msg != NULL) {
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return msg;
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}
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msg_ctx = server_messaging_context();
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if (msg_ctx == NULL) {
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smb_panic("server_messaging_context failed\n");
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}
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myself = messaging_server_id(msg_ctx);
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lp_ctx = loadparm_init_s3(NULL, loadparm_s3_helpers());
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if (lp_ctx == NULL) {
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smb_panic("Could not load smb.conf to init winbindd's imessaging context.\n");
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}
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/*
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* Note we MUST use the NULL context here, not the autofree context,
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* to avoid side effects in forked children exiting.
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*/
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msg = imessaging_init(NULL, lp_ctx, myself, winbind_event_context());
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talloc_unlink(NULL, lp_ctx);
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if (msg == NULL) {
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smb_panic("Could not init winbindd's messaging context.\n");
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}
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return msg;
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}
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/* Reload configuration */
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static bool reload_services_file(const char *lfile)
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{
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bool ret;
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if (lp_loaded()) {
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char *fname = lp_next_configfile(talloc_tos());
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if (file_exist(fname) && !strcsequal(fname,get_dyn_CONFIGFILE())) {
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set_dyn_CONFIGFILE(fname);
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}
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TALLOC_FREE(fname);
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}
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/* if this is a child, restore the logfile to the special
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name - <domain>, idmap, etc. */
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if (lfile && *lfile) {
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lp_set_logfile(lfile);
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}
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reopen_logs();
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ret = lp_load_global(get_dyn_CONFIGFILE());
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reopen_logs();
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load_interfaces();
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winbindd_setup_max_fds();
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return(ret);
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}
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static void winbindd_status(void)
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{
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struct winbindd_cli_state *tmp;
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DEBUG(0, ("winbindd status:\n"));
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/* Print client state information */
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DEBUG(0, ("\t%d clients currently active\n", winbindd_num_clients()));
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if (DEBUGLEVEL >= 2 && winbindd_num_clients()) {
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DEBUG(2, ("\tclient list:\n"));
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for(tmp = winbindd_client_list(); tmp; tmp = tmp->next) {
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DEBUGADD(2, ("\t\tpid %lu, sock %d (%s)\n",
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(unsigned long)tmp->pid, tmp->sock,
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client_is_idle(tmp) ? "idle" : "active"));
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}
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}
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}
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/* Flush client cache */
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static void flush_caches(void)
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{
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/* We need to invalidate cached user list entries on a SIGHUP
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otherwise cached access denied errors due to restrict anonymous
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hang around until the sequence number changes. */
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if (!wcache_invalidate_cache()) {
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DEBUG(0, ("invalidating the cache failed; revalidate the cache\n"));
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if (!winbindd_cache_validate_and_initialize()) {
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exit(1);
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}
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}
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}
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static void flush_caches_noinit(void)
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{
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/*
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* We need to invalidate cached user list entries on a SIGHUP
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* otherwise cached access denied errors due to restrict anonymous
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* hang around until the sequence number changes.
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* NB
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* Skip uninitialized domains when flush cache.
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* If domain is not initialized, it means it is never
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* used or never become online. look, wcache_invalidate_cache()
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* -> get_cache() -> init_dc_connection(). It causes a lot of traffic
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* for unused domains and large traffic for primay domain's DC if there
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* are many domains..
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*/
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if (!wcache_invalidate_cache_noinit()) {
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DEBUG(0, ("invalidating the cache failed; revalidate the cache\n"));
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if (!winbindd_cache_validate_and_initialize()) {
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exit(1);
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}
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}
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}
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/* Handle the signal by unlinking socket and exiting */
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static void terminate(bool is_parent)
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{
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if (is_parent) {
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/* When parent goes away we should
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* remove the socket file. Not so
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* when children terminate.
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*/
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char *path = NULL;
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if (asprintf(&path, "%s/%s",
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lp_winbindd_socket_directory(), WINBINDD_SOCKET_NAME) > 0) {
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unlink(path);
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SAFE_FREE(path);
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}
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}
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idmap_close();
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trustdom_cache_shutdown();
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gencache_stabilize();
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#if 0
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if (interactive) {
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TALLOC_CTX *mem_ctx = talloc_init("end_description");
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char *description = talloc_describe_all(mem_ctx);
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DEBUG(3, ("tallocs left:\n%s\n", description));
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talloc_destroy(mem_ctx);
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}
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#endif
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if (is_parent) {
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struct messaging_context *msg = winbind_messaging_context();
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struct server_id self = messaging_server_id(msg);
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serverid_deregister(self);
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pidfile_unlink(lp_pid_directory(), "winbindd");
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}
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exit(0);
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}
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static void winbindd_sig_term_handler(struct tevent_context *ev,
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struct tevent_signal *se,
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int signum,
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int count,
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void *siginfo,
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void *private_data)
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{
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bool *is_parent = talloc_get_type_abort(private_data, bool);
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DEBUG(0,("Got sig[%d] terminate (is_parent=%d)\n",
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signum, (int)*is_parent));
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terminate(*is_parent);
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}
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/*
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handle stdin becoming readable when we are in --foreground mode
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*/
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static void winbindd_stdin_handler(struct tevent_context *ev,
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struct tevent_fd *fde,
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uint16_t flags,
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void *private_data)
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{
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char c;
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if (read(0, &c, 1) != 1) {
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bool *is_parent = talloc_get_type_abort(private_data, bool);
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/* we have reached EOF on stdin, which means the
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parent has exited. Shutdown the server */
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DEBUG(0,("EOF on stdin (is_parent=%d)\n",
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(int)*is_parent));
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terminate(*is_parent);
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}
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}
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bool winbindd_setup_sig_term_handler(bool parent)
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{
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struct tevent_signal *se;
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bool *is_parent;
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is_parent = talloc(winbind_event_context(), bool);
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if (!is_parent) {
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return false;
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}
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*is_parent = parent;
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se = tevent_add_signal(winbind_event_context(),
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is_parent,
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SIGTERM, 0,
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winbindd_sig_term_handler,
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is_parent);
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if (!se) {
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DEBUG(0,("failed to setup SIGTERM handler"));
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talloc_free(is_parent);
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return false;
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}
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se = tevent_add_signal(winbind_event_context(),
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is_parent,
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SIGINT, 0,
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winbindd_sig_term_handler,
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is_parent);
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if (!se) {
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DEBUG(0,("failed to setup SIGINT handler"));
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talloc_free(is_parent);
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return false;
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}
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se = tevent_add_signal(winbind_event_context(),
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is_parent,
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SIGQUIT, 0,
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winbindd_sig_term_handler,
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is_parent);
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if (!se) {
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DEBUG(0,("failed to setup SIGINT handler"));
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talloc_free(is_parent);
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return false;
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}
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return true;
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}
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bool winbindd_setup_stdin_handler(bool parent, bool foreground)
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{
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bool *is_parent;
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if (foreground) {
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struct stat st;
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is_parent = talloc(winbind_event_context(), bool);
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if (!is_parent) {
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return false;
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}
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*is_parent = parent;
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/* if we are running in the foreground then look for
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EOF on stdin, and exit if it happens. This allows
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us to die if the parent process dies
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Only do this on a pipe or socket, no other device.
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*/
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if (fstat(0, &st) != 0) {
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return false;
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}
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if (S_ISFIFO(st.st_mode) || S_ISSOCK(st.st_mode)) {
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tevent_add_fd(winbind_event_context(),
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is_parent,
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0,
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TEVENT_FD_READ,
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winbindd_stdin_handler,
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is_parent);
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}
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}
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return true;
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}
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static void winbindd_sig_hup_handler(struct tevent_context *ev,
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struct tevent_signal *se,
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int signum,
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int count,
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void *siginfo,
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void *private_data)
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{
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const char *file = (const char *)private_data;
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DEBUG(1,("Reloading services after SIGHUP\n"));
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flush_caches_noinit();
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reload_services_file(file);
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}
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bool winbindd_setup_sig_hup_handler(const char *lfile)
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{
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struct tevent_signal *se;
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char *file = NULL;
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if (lfile) {
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file = talloc_strdup(winbind_event_context(),
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lfile);
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if (!file) {
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return false;
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}
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}
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se = tevent_add_signal(winbind_event_context(),
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winbind_event_context(),
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SIGHUP, 0,
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winbindd_sig_hup_handler,
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file);
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if (!se) {
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return false;
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}
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return true;
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}
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static void winbindd_sig_chld_handler(struct tevent_context *ev,
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struct tevent_signal *se,
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int signum,
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int count,
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void *siginfo,
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void *private_data)
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{
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pid_t pid;
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while ((pid = waitpid(-1, NULL, WNOHANG)) > 0) {
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winbind_child_died(pid);
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}
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}
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static bool winbindd_setup_sig_chld_handler(void)
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{
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struct tevent_signal *se;
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se = tevent_add_signal(winbind_event_context(),
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winbind_event_context(),
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SIGCHLD, 0,
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winbindd_sig_chld_handler,
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NULL);
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if (!se) {
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return false;
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}
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return true;
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}
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static void winbindd_sig_usr2_handler(struct tevent_context *ev,
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struct tevent_signal *se,
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int signum,
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int count,
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void *siginfo,
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void *private_data)
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{
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winbindd_status();
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}
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static bool winbindd_setup_sig_usr2_handler(void)
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{
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struct tevent_signal *se;
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se = tevent_add_signal(winbind_event_context(),
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winbind_event_context(),
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SIGUSR2, 0,
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winbindd_sig_usr2_handler,
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NULL);
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if (!se) {
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return false;
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}
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return true;
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}
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/* React on 'smbcontrol winbindd reload-config' in the same way as on SIGHUP*/
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static void msg_reload_services(struct messaging_context *msg,
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void *private_data,
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uint32_t msg_type,
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struct server_id server_id,
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DATA_BLOB *data)
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{
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/* Flush various caches */
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flush_caches();
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reload_services_file((const char *) private_data);
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}
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/* React on 'smbcontrol winbindd shutdown' in the same way as on SIGTERM*/
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static void msg_shutdown(struct messaging_context *msg,
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void *private_data,
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uint32_t msg_type,
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struct server_id server_id,
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DATA_BLOB *data)
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{
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/* only the parent waits for this message */
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DEBUG(0,("Got shutdown message\n"));
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terminate(true);
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}
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|
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static void winbind_msg_validate_cache(struct messaging_context *msg_ctx,
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void *private_data,
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uint32_t msg_type,
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struct server_id server_id,
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DATA_BLOB *data)
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{
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uint8_t ret;
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pid_t child_pid;
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NTSTATUS status;
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DEBUG(10, ("winbindd_msg_validate_cache: got validate-cache "
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"message.\n"));
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/*
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* call the validation code from a child:
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* so we don't block the main winbindd and the validation
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* code can safely use fork/waitpid...
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*/
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child_pid = fork();
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if (child_pid == -1) {
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DEBUG(1, ("winbind_msg_validate_cache: Could not fork: %s\n",
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strerror(errno)));
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return;
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}
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if (child_pid != 0) {
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/* parent */
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DEBUG(5, ("winbind_msg_validate_cache: child created with "
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"pid %d.\n", (int)child_pid));
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return;
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}
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/* child */
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status = winbindd_reinit_after_fork(NULL, NULL);
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if (!NT_STATUS_IS_OK(status)) {
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DEBUG(1, ("winbindd_reinit_after_fork failed: %s\n",
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nt_errstr(status)));
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_exit(0);
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}
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|
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/* install default SIGCHLD handler: validation code uses fork/waitpid */
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CatchSignal(SIGCHLD, SIG_DFL);
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ret = (uint8_t)winbindd_validate_cache_nobackup();
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DEBUG(10, ("winbindd_msg_validata_cache: got return value %d\n", ret));
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messaging_send_buf(msg_ctx, server_id, MSG_WINBIND_VALIDATE_CACHE, &ret,
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(size_t)1);
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_exit(0);
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}
|
|
|
|
static struct winbindd_dispatch_table {
|
|
enum winbindd_cmd cmd;
|
|
void (*fn)(struct winbindd_cli_state *state);
|
|
const char *winbindd_cmd_name;
|
|
} dispatch_table[] = {
|
|
|
|
/* Enumeration functions */
|
|
|
|
{ WINBINDD_LIST_TRUSTDOM, winbindd_list_trusted_domains,
|
|
"LIST_TRUSTDOM" },
|
|
|
|
/* Miscellaneous */
|
|
|
|
{ WINBINDD_INFO, winbindd_info, "INFO" },
|
|
{ WINBINDD_INTERFACE_VERSION, winbindd_interface_version,
|
|
"INTERFACE_VERSION" },
|
|
{ WINBINDD_DOMAIN_NAME, winbindd_domain_name, "DOMAIN_NAME" },
|
|
{ WINBINDD_DOMAIN_INFO, winbindd_domain_info, "DOMAIN_INFO" },
|
|
{ WINBINDD_DC_INFO, winbindd_dc_info, "DC_INFO" },
|
|
{ WINBINDD_NETBIOS_NAME, winbindd_netbios_name, "NETBIOS_NAME" },
|
|
{ WINBINDD_PRIV_PIPE_DIR, winbindd_priv_pipe_dir,
|
|
"WINBINDD_PRIV_PIPE_DIR" },
|
|
|
|
/* Credential cache access */
|
|
{ WINBINDD_CCACHE_NTLMAUTH, winbindd_ccache_ntlm_auth, "NTLMAUTH" },
|
|
{ WINBINDD_CCACHE_SAVE, winbindd_ccache_save, "CCACHE_SAVE" },
|
|
|
|
/* End of list */
|
|
|
|
{ WINBINDD_NUM_CMDS, NULL, "NONE" }
|
|
};
|
|
|
|
struct winbindd_async_dispatch_table {
|
|
enum winbindd_cmd cmd;
|
|
const char *cmd_name;
|
|
struct tevent_req *(*send_req)(TALLOC_CTX *mem_ctx,
|
|
struct tevent_context *ev,
|
|
struct winbindd_cli_state *cli,
|
|
struct winbindd_request *request);
|
|
NTSTATUS (*recv_req)(struct tevent_req *req,
|
|
struct winbindd_response *presp);
|
|
};
|
|
|
|
static struct winbindd_async_dispatch_table async_nonpriv_table[] = {
|
|
{ WINBINDD_PING, "PING",
|
|
wb_ping_send, wb_ping_recv },
|
|
{ WINBINDD_LOOKUPSID, "LOOKUPSID",
|
|
winbindd_lookupsid_send, winbindd_lookupsid_recv },
|
|
{ WINBINDD_LOOKUPSIDS, "LOOKUPSIDS",
|
|
winbindd_lookupsids_send, winbindd_lookupsids_recv },
|
|
{ WINBINDD_LOOKUPNAME, "LOOKUPNAME",
|
|
winbindd_lookupname_send, winbindd_lookupname_recv },
|
|
{ WINBINDD_SIDS_TO_XIDS, "SIDS_TO_XIDS",
|
|
winbindd_sids_to_xids_send, winbindd_sids_to_xids_recv },
|
|
{ WINBINDD_XIDS_TO_SIDS, "XIDS_TO_SIDS",
|
|
winbindd_xids_to_sids_send, winbindd_xids_to_sids_recv },
|
|
{ WINBINDD_GETPWSID, "GETPWSID",
|
|
winbindd_getpwsid_send, winbindd_getpwsid_recv },
|
|
{ WINBINDD_GETPWNAM, "GETPWNAM",
|
|
winbindd_getpwnam_send, winbindd_getpwnam_recv },
|
|
{ WINBINDD_GETPWUID, "GETPWUID",
|
|
winbindd_getpwuid_send, winbindd_getpwuid_recv },
|
|
{ WINBINDD_GETSIDALIASES, "GETSIDALIASES",
|
|
winbindd_getsidaliases_send, winbindd_getsidaliases_recv },
|
|
{ WINBINDD_GETUSERDOMGROUPS, "GETUSERDOMGROUPS",
|
|
winbindd_getuserdomgroups_send, winbindd_getuserdomgroups_recv },
|
|
{ WINBINDD_GETGROUPS, "GETGROUPS",
|
|
winbindd_getgroups_send, winbindd_getgroups_recv },
|
|
{ WINBINDD_SHOW_SEQUENCE, "SHOW_SEQUENCE",
|
|
winbindd_show_sequence_send, winbindd_show_sequence_recv },
|
|
{ WINBINDD_GETGRGID, "GETGRGID",
|
|
winbindd_getgrgid_send, winbindd_getgrgid_recv },
|
|
{ WINBINDD_GETGRNAM, "GETGRNAM",
|
|
winbindd_getgrnam_send, winbindd_getgrnam_recv },
|
|
{ WINBINDD_GETUSERSIDS, "GETUSERSIDS",
|
|
winbindd_getusersids_send, winbindd_getusersids_recv },
|
|
{ WINBINDD_LOOKUPRIDS, "LOOKUPRIDS",
|
|
winbindd_lookuprids_send, winbindd_lookuprids_recv },
|
|
{ WINBINDD_SETPWENT, "SETPWENT",
|
|
winbindd_setpwent_send, winbindd_setpwent_recv },
|
|
{ WINBINDD_GETPWENT, "GETPWENT",
|
|
winbindd_getpwent_send, winbindd_getpwent_recv },
|
|
{ WINBINDD_ENDPWENT, "ENDPWENT",
|
|
winbindd_endpwent_send, winbindd_endpwent_recv },
|
|
{ WINBINDD_DSGETDCNAME, "DSGETDCNAME",
|
|
winbindd_dsgetdcname_send, winbindd_dsgetdcname_recv },
|
|
{ WINBINDD_GETDCNAME, "GETDCNAME",
|
|
winbindd_getdcname_send, winbindd_getdcname_recv },
|
|
{ WINBINDD_SETGRENT, "SETGRENT",
|
|
winbindd_setgrent_send, winbindd_setgrent_recv },
|
|
{ WINBINDD_GETGRENT, "GETGRENT",
|
|
winbindd_getgrent_send, winbindd_getgrent_recv },
|
|
{ WINBINDD_ENDGRENT, "ENDGRENT",
|
|
winbindd_endgrent_send, winbindd_endgrent_recv },
|
|
{ WINBINDD_LIST_USERS, "LIST_USERS",
|
|
winbindd_list_users_send, winbindd_list_users_recv },
|
|
{ WINBINDD_LIST_GROUPS, "LIST_GROUPS",
|
|
winbindd_list_groups_send, winbindd_list_groups_recv },
|
|
{ WINBINDD_CHECK_MACHACC, "CHECK_MACHACC",
|
|
winbindd_check_machine_acct_send, winbindd_check_machine_acct_recv },
|
|
{ WINBINDD_PING_DC, "PING_DC",
|
|
winbindd_ping_dc_send, winbindd_ping_dc_recv },
|
|
{ WINBINDD_PAM_AUTH, "PAM_AUTH",
|
|
winbindd_pam_auth_send, winbindd_pam_auth_recv },
|
|
{ WINBINDD_PAM_LOGOFF, "PAM_LOGOFF",
|
|
winbindd_pam_logoff_send, winbindd_pam_logoff_recv },
|
|
{ WINBINDD_PAM_CHAUTHTOK, "PAM_CHAUTHTOK",
|
|
winbindd_pam_chauthtok_send, winbindd_pam_chauthtok_recv },
|
|
{ WINBINDD_PAM_CHNG_PSWD_AUTH_CRAP, "PAM_CHNG_PSWD_AUTH_CRAP",
|
|
winbindd_pam_chng_pswd_auth_crap_send,
|
|
winbindd_pam_chng_pswd_auth_crap_recv },
|
|
{ WINBINDD_WINS_BYIP, "WINS_BYIP",
|
|
winbindd_wins_byip_send, winbindd_wins_byip_recv },
|
|
{ WINBINDD_WINS_BYNAME, "WINS_BYNAME",
|
|
winbindd_wins_byname_send, winbindd_wins_byname_recv },
|
|
|
|
{ 0, NULL, NULL, NULL }
|
|
};
|
|
|
|
static struct winbindd_async_dispatch_table async_priv_table[] = {
|
|
{ WINBINDD_ALLOCATE_UID, "ALLOCATE_UID",
|
|
winbindd_allocate_uid_send, winbindd_allocate_uid_recv },
|
|
{ WINBINDD_ALLOCATE_GID, "ALLOCATE_GID",
|
|
winbindd_allocate_gid_send, winbindd_allocate_gid_recv },
|
|
{ WINBINDD_CHANGE_MACHACC, "CHANGE_MACHACC",
|
|
winbindd_change_machine_acct_send, winbindd_change_machine_acct_recv },
|
|
{ WINBINDD_PAM_AUTH_CRAP, "PAM_AUTH_CRAP",
|
|
winbindd_pam_auth_crap_send, winbindd_pam_auth_crap_recv },
|
|
|
|
{ 0, NULL, NULL, NULL }
|
|
};
|
|
|
|
static void wb_request_done(struct tevent_req *req);
|
|
|
|
static void process_request(struct winbindd_cli_state *state)
|
|
{
|
|
struct winbindd_dispatch_table *table = dispatch_table;
|
|
struct winbindd_async_dispatch_table *atable;
|
|
|
|
state->mem_ctx = talloc_named(state, 0, "winbind request");
|
|
if (state->mem_ctx == NULL)
|
|
return;
|
|
|
|
/* Remember who asked us. */
|
|
state->pid = state->request->pid;
|
|
|
|
state->cmd_name = "unknown request";
|
|
state->recv_fn = NULL;
|
|
/* client is newest */
|
|
winbindd_promote_client(state);
|
|
|
|
/* Process command */
|
|
|
|
for (atable = async_nonpriv_table; atable->send_req; atable += 1) {
|
|
if (state->request->cmd == atable->cmd) {
|
|
break;
|
|
}
|
|
}
|
|
|
|
if ((atable->send_req == NULL) && state->privileged) {
|
|
for (atable = async_priv_table; atable->send_req;
|
|
atable += 1) {
|
|
if (state->request->cmd == atable->cmd) {
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
|
|
if (atable->send_req != NULL) {
|
|
struct tevent_req *req;
|
|
|
|
state->cmd_name = atable->cmd_name;
|
|
state->recv_fn = atable->recv_req;
|
|
|
|
DEBUG(10, ("process_request: Handling async request %d:%s\n",
|
|
(int)state->pid, state->cmd_name));
|
|
|
|
req = atable->send_req(state->mem_ctx, winbind_event_context(),
|
|
state, state->request);
|
|
if (req == NULL) {
|
|
DEBUG(0, ("process_request: atable->send failed for "
|
|
"%s\n", atable->cmd_name));
|
|
request_error(state);
|
|
return;
|
|
}
|
|
tevent_req_set_callback(req, wb_request_done, state);
|
|
return;
|
|
}
|
|
|
|
state->response = talloc_zero(state->mem_ctx,
|
|
struct winbindd_response);
|
|
if (state->response == NULL) {
|
|
DEBUG(10, ("talloc failed\n"));
|
|
remove_client(state);
|
|
return;
|
|
}
|
|
state->response->result = WINBINDD_PENDING;
|
|
state->response->length = sizeof(struct winbindd_response);
|
|
|
|
for (table = dispatch_table; table->fn; table++) {
|
|
if (state->request->cmd == table->cmd) {
|
|
DEBUG(10,("process_request: request fn %s\n",
|
|
table->winbindd_cmd_name ));
|
|
state->cmd_name = table->winbindd_cmd_name;
|
|
table->fn(state);
|
|
break;
|
|
}
|
|
}
|
|
|
|
if (!table->fn) {
|
|
DEBUG(10,("process_request: unknown request fn number %d\n",
|
|
(int)state->request->cmd ));
|
|
request_error(state);
|
|
}
|
|
}
|
|
|
|
static void wb_request_done(struct tevent_req *req)
|
|
{
|
|
struct winbindd_cli_state *state = tevent_req_callback_data(
|
|
req, struct winbindd_cli_state);
|
|
NTSTATUS status;
|
|
|
|
state->response = talloc_zero(state->mem_ctx,
|
|
struct winbindd_response);
|
|
if (state->response == NULL) {
|
|
DEBUG(0, ("wb_request_done[%d:%s]: talloc_zero failed - removing client\n",
|
|
(int)state->pid, state->cmd_name));
|
|
remove_client(state);
|
|
return;
|
|
}
|
|
state->response->result = WINBINDD_PENDING;
|
|
state->response->length = sizeof(struct winbindd_response);
|
|
|
|
status = state->recv_fn(req, state->response);
|
|
TALLOC_FREE(req);
|
|
|
|
DEBUG(10,("wb_request_done[%d:%s]: %s\n",
|
|
(int)state->pid, state->cmd_name, nt_errstr(status)));
|
|
|
|
if (!NT_STATUS_IS_OK(status)) {
|
|
request_error(state);
|
|
return;
|
|
}
|
|
request_ok(state);
|
|
}
|
|
|
|
/*
|
|
* This is the main event loop of winbind requests. It goes through a
|
|
* state-machine of 3 read/write requests, 4 if you have extra data to send.
|
|
*
|
|
* An idle winbind client has a read request of 4 bytes outstanding,
|
|
* finalizing function is request_len_recv, checking the length. request_recv
|
|
* then processes the packet. The processing function then at some point has
|
|
* to call request_finished which schedules sending the response.
|
|
*/
|
|
|
|
static void request_finished(struct winbindd_cli_state *state);
|
|
|
|
static void winbind_client_request_read(struct tevent_req *req);
|
|
static void winbind_client_response_written(struct tevent_req *req);
|
|
static void winbind_client_activity(struct tevent_req *req);
|
|
|
|
static void request_finished(struct winbindd_cli_state *state)
|
|
{
|
|
struct tevent_req *req;
|
|
|
|
/* free client socket monitoring request */
|
|
TALLOC_FREE(state->io_req);
|
|
|
|
TALLOC_FREE(state->request);
|
|
|
|
req = wb_resp_write_send(state, winbind_event_context(),
|
|
state->out_queue, state->sock,
|
|
state->response);
|
|
if (req == NULL) {
|
|
DEBUG(10,("request_finished[%d:%s]: wb_resp_write_send() failed\n",
|
|
(int)state->pid, state->cmd_name));
|
|
remove_client(state);
|
|
return;
|
|
}
|
|
tevent_req_set_callback(req, winbind_client_response_written, state);
|
|
state->io_req = req;
|
|
}
|
|
|
|
static void winbind_client_response_written(struct tevent_req *req)
|
|
{
|
|
struct winbindd_cli_state *state = tevent_req_callback_data(
|
|
req, struct winbindd_cli_state);
|
|
ssize_t ret;
|
|
int err;
|
|
|
|
state->io_req = NULL;
|
|
|
|
ret = wb_resp_write_recv(req, &err);
|
|
TALLOC_FREE(req);
|
|
if (ret == -1) {
|
|
close(state->sock);
|
|
state->sock = -1;
|
|
DEBUG(2, ("Could not write response[%d:%s] to client: %s\n",
|
|
(int)state->pid, state->cmd_name, strerror(err)));
|
|
remove_client(state);
|
|
return;
|
|
}
|
|
|
|
DEBUG(10,("winbind_client_response_written[%d:%s]: delivered response "
|
|
"to client\n", (int)state->pid, state->cmd_name));
|
|
|
|
TALLOC_FREE(state->mem_ctx);
|
|
state->response = NULL;
|
|
state->cmd_name = "no request";
|
|
state->recv_fn = NULL;
|
|
|
|
req = wb_req_read_send(state, winbind_event_context(), state->sock,
|
|
WINBINDD_MAX_EXTRA_DATA);
|
|
if (req == NULL) {
|
|
remove_client(state);
|
|
return;
|
|
}
|
|
tevent_req_set_callback(req, winbind_client_request_read, state);
|
|
state->io_req = req;
|
|
}
|
|
|
|
void request_error(struct winbindd_cli_state *state)
|
|
{
|
|
SMB_ASSERT(state->response->result == WINBINDD_PENDING);
|
|
state->response->result = WINBINDD_ERROR;
|
|
request_finished(state);
|
|
}
|
|
|
|
void request_ok(struct winbindd_cli_state *state)
|
|
{
|
|
SMB_ASSERT(state->response->result == WINBINDD_PENDING);
|
|
state->response->result = WINBINDD_OK;
|
|
request_finished(state);
|
|
}
|
|
|
|
/* Process a new connection by adding it to the client connection list */
|
|
|
|
static void new_connection(int listen_sock, bool privileged)
|
|
{
|
|
struct sockaddr_un sunaddr;
|
|
struct winbindd_cli_state *state;
|
|
struct tevent_req *req;
|
|
socklen_t len;
|
|
int sock;
|
|
|
|
/* Accept connection */
|
|
|
|
len = sizeof(sunaddr);
|
|
|
|
sock = accept(listen_sock, (struct sockaddr *)(void *)&sunaddr, &len);
|
|
|
|
if (sock == -1) {
|
|
if (errno != EINTR) {
|
|
DEBUG(0, ("Failed to accept socket - %s\n",
|
|
strerror(errno)));
|
|
}
|
|
return;
|
|
}
|
|
|
|
DEBUG(6,("accepted socket %d\n", sock));
|
|
|
|
/* Create new connection structure */
|
|
|
|
if ((state = talloc_zero(NULL, struct winbindd_cli_state)) == NULL) {
|
|
close(sock);
|
|
return;
|
|
}
|
|
|
|
state->sock = sock;
|
|
|
|
state->out_queue = tevent_queue_create(state, "winbind client reply");
|
|
if (state->out_queue == NULL) {
|
|
close(sock);
|
|
TALLOC_FREE(state);
|
|
return;
|
|
}
|
|
|
|
state->privileged = privileged;
|
|
|
|
req = wb_req_read_send(state, winbind_event_context(), state->sock,
|
|
WINBINDD_MAX_EXTRA_DATA);
|
|
if (req == NULL) {
|
|
TALLOC_FREE(state);
|
|
close(sock);
|
|
return;
|
|
}
|
|
tevent_req_set_callback(req, winbind_client_request_read, state);
|
|
state->io_req = req;
|
|
|
|
/* Add to connection list */
|
|
|
|
winbindd_add_client(state);
|
|
}
|
|
|
|
static void winbind_client_request_read(struct tevent_req *req)
|
|
{
|
|
struct winbindd_cli_state *state = tevent_req_callback_data(
|
|
req, struct winbindd_cli_state);
|
|
ssize_t ret;
|
|
int err;
|
|
|
|
state->io_req = NULL;
|
|
|
|
ret = wb_req_read_recv(req, state, &state->request, &err);
|
|
TALLOC_FREE(req);
|
|
if (ret == -1) {
|
|
if (err == EPIPE) {
|
|
DEBUG(6, ("closing socket %d, client exited\n",
|
|
state->sock));
|
|
} else {
|
|
DEBUG(2, ("Could not read client request from fd %d: "
|
|
"%s\n", state->sock, strerror(err)));
|
|
}
|
|
close(state->sock);
|
|
state->sock = -1;
|
|
remove_client(state);
|
|
return;
|
|
}
|
|
|
|
req = wait_for_read_send(state, winbind_event_context(), state->sock,
|
|
true);
|
|
if (req == NULL) {
|
|
DEBUG(0, ("winbind_client_request_read[%d:%s]:"
|
|
" wait_for_read_send failed - removing client\n",
|
|
(int)state->pid, state->cmd_name));
|
|
remove_client(state);
|
|
return;
|
|
}
|
|
tevent_req_set_callback(req, winbind_client_activity, state);
|
|
state->io_req = req;
|
|
|
|
process_request(state);
|
|
}
|
|
|
|
static void winbind_client_activity(struct tevent_req *req)
|
|
{
|
|
struct winbindd_cli_state *state =
|
|
tevent_req_callback_data(req, struct winbindd_cli_state);
|
|
int err;
|
|
bool has_data;
|
|
|
|
has_data = wait_for_read_recv(req, &err);
|
|
|
|
if (has_data) {
|
|
DEBUG(0, ("winbind_client_activity[%d:%s]:"
|
|
"unexpected data from client - removing client\n",
|
|
(int)state->pid, state->cmd_name));
|
|
} else {
|
|
if (err == EPIPE) {
|
|
DEBUG(6, ("winbind_client_activity[%d:%s]: "
|
|
"client has closed connection - removing "
|
|
"client\n",
|
|
(int)state->pid, state->cmd_name));
|
|
} else {
|
|
DEBUG(2, ("winbind_client_activity[%d:%s]: "
|
|
"client socket error (%s) - removing "
|
|
"client\n",
|
|
(int)state->pid, state->cmd_name,
|
|
strerror(err)));
|
|
}
|
|
}
|
|
|
|
remove_client(state);
|
|
}
|
|
|
|
/* Remove a client connection from client connection list */
|
|
|
|
static void remove_client(struct winbindd_cli_state *state)
|
|
{
|
|
char c = 0;
|
|
int nwritten;
|
|
|
|
/* It's a dead client - hold a funeral */
|
|
|
|
if (state == NULL) {
|
|
return;
|
|
}
|
|
|
|
/*
|
|
* We need to remove a pending wb_req_read_*
|
|
* or wb_resp_write_* request before closing the
|
|
* socket.
|
|
*
|
|
* This is important as they might have used tevent_add_fd() and we
|
|
* use the epoll * backend on linux. So we must remove the tevent_fd
|
|
* before closing the fd.
|
|
*
|
|
* Otherwise we might hit a race with close_conns_after_fork() (via
|
|
* winbindd_reinit_after_fork()) where a file description
|
|
* is still open in a child, which means it's still active in
|
|
* the parents epoll queue, but the related tevent_fd is already
|
|
* already gone in the parent.
|
|
*
|
|
* See bug #11141.
|
|
*/
|
|
TALLOC_FREE(state->io_req);
|
|
|
|
if (state->sock != -1) {
|
|
/* tell client, we are closing ... */
|
|
nwritten = write(state->sock, &c, sizeof(c));
|
|
if (nwritten == -1) {
|
|
DEBUG(2, ("final write to client failed: %s\n",
|
|
strerror(errno)));
|
|
}
|
|
|
|
/* Close socket */
|
|
|
|
close(state->sock);
|
|
state->sock = -1;
|
|
}
|
|
|
|
TALLOC_FREE(state->mem_ctx);
|
|
|
|
/* Remove from list and free */
|
|
|
|
winbindd_remove_client(state);
|
|
TALLOC_FREE(state);
|
|
}
|
|
|
|
/* Is a client idle? */
|
|
|
|
static bool client_is_idle(struct winbindd_cli_state *state) {
|
|
return (state->request == NULL &&
|
|
state->response == NULL &&
|
|
!state->pwent_state && !state->grent_state);
|
|
}
|
|
|
|
/* Shutdown client connection which has been idle for the longest time */
|
|
|
|
static bool remove_idle_client(void)
|
|
{
|
|
struct winbindd_cli_state *state, *remove_state = NULL;
|
|
int nidle = 0;
|
|
|
|
for (state = winbindd_client_list(); state; state = state->next) {
|
|
if (client_is_idle(state)) {
|
|
nidle++;
|
|
/* list is sorted by access time */
|
|
remove_state = state;
|
|
}
|
|
}
|
|
|
|
if (remove_state) {
|
|
DEBUG(5,("Found %d idle client connections, shutting down sock %d, pid %u\n",
|
|
nidle, remove_state->sock, (unsigned int)remove_state->pid));
|
|
remove_client(remove_state);
|
|
return True;
|
|
}
|
|
|
|
return False;
|
|
}
|
|
|
|
/*
|
|
* Terminate all clients whose requests have taken longer than
|
|
* "winbind request timeout" seconds to process, or have been
|
|
* idle for more than "winbind request timeout" seconds.
|
|
*/
|
|
|
|
static void remove_timed_out_clients(void)
|
|
{
|
|
struct winbindd_cli_state *state, *prev = NULL;
|
|
time_t curr_time = time(NULL);
|
|
int timeout_val = lp_winbind_request_timeout();
|
|
|
|
for (state = winbindd_client_list_tail(); state; state = prev) {
|
|
time_t expiry_time;
|
|
|
|
prev = winbindd_client_list_prev(state);
|
|
expiry_time = state->last_access + timeout_val;
|
|
|
|
if (curr_time > expiry_time) {
|
|
if (client_is_idle(state)) {
|
|
DEBUG(5,("Idle client timed out, "
|
|
"shutting down sock %d, pid %u\n",
|
|
state->sock,
|
|
(unsigned int)state->pid));
|
|
} else {
|
|
DEBUG(5,("Client request timed out, "
|
|
"shutting down sock %d, pid %u\n",
|
|
state->sock,
|
|
(unsigned int)state->pid));
|
|
}
|
|
remove_client(state);
|
|
} else {
|
|
/* list is sorted, previous clients in
|
|
list are newer */
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
|
|
static void winbindd_scrub_clients_handler(struct tevent_context *ev,
|
|
struct tevent_timer *te,
|
|
struct timeval current_time,
|
|
void *private_data)
|
|
{
|
|
remove_timed_out_clients();
|
|
if (tevent_add_timer(ev, ev,
|
|
timeval_current_ofs(SCRUB_CLIENTS_INTERVAL, 0),
|
|
winbindd_scrub_clients_handler, NULL) == NULL) {
|
|
DEBUG(0, ("winbindd: failed to reschedule client scrubber\n"));
|
|
exit(1);
|
|
}
|
|
}
|
|
|
|
struct winbindd_listen_state {
|
|
bool privileged;
|
|
int fd;
|
|
};
|
|
|
|
static void winbindd_listen_fde_handler(struct tevent_context *ev,
|
|
struct tevent_fd *fde,
|
|
uint16_t flags,
|
|
void *private_data)
|
|
{
|
|
struct winbindd_listen_state *s = talloc_get_type_abort(private_data,
|
|
struct winbindd_listen_state);
|
|
|
|
while (winbindd_num_clients() > lp_winbind_max_clients() - 1) {
|
|
DEBUG(5,("winbindd: Exceeding %d client "
|
|
"connections, removing idle "
|
|
"connection.\n", lp_winbind_max_clients()));
|
|
if (!remove_idle_client()) {
|
|
DEBUG(0,("winbindd: Exceeding %d "
|
|
"client connections, no idle "
|
|
"connection found\n",
|
|
lp_winbind_max_clients()));
|
|
break;
|
|
}
|
|
}
|
|
remove_timed_out_clients();
|
|
new_connection(s->fd, s->privileged);
|
|
}
|
|
|
|
/*
|
|
* Winbindd socket accessor functions
|
|
*/
|
|
|
|
char *get_winbind_priv_pipe_dir(void)
|
|
{
|
|
return state_path(WINBINDD_PRIV_SOCKET_SUBDIR);
|
|
}
|
|
|
|
static void winbindd_setup_max_fds(void)
|
|
{
|
|
int num_fds = MAX_OPEN_FUDGEFACTOR;
|
|
int actual_fds;
|
|
|
|
num_fds += lp_winbind_max_clients();
|
|
/* Add some more to account for 2 sockets open
|
|
when the client transitions from unprivileged
|
|
to privileged socket
|
|
*/
|
|
num_fds += lp_winbind_max_clients() / 10;
|
|
|
|
/* Add one socket per child process
|
|
(yeah there are child processes other than the
|
|
domain children but only domain children can vary
|
|
with configuration
|
|
*/
|
|
num_fds += lp_winbind_max_domain_connections() *
|
|
(lp_allow_trusted_domains() ? WINBIND_MAX_DOMAINS_HINT : 1);
|
|
|
|
actual_fds = set_maxfiles(num_fds);
|
|
|
|
if (actual_fds < num_fds) {
|
|
DEBUG(1, ("winbindd_setup_max_fds: Information only: "
|
|
"requested %d open files, %d are available.\n",
|
|
num_fds, actual_fds));
|
|
}
|
|
}
|
|
|
|
static bool winbindd_setup_listeners(void)
|
|
{
|
|
struct winbindd_listen_state *pub_state = NULL;
|
|
struct winbindd_listen_state *priv_state = NULL;
|
|
struct tevent_fd *fde;
|
|
int rc;
|
|
char *socket_path;
|
|
|
|
pub_state = talloc(winbind_event_context(),
|
|
struct winbindd_listen_state);
|
|
if (!pub_state) {
|
|
goto failed;
|
|
}
|
|
|
|
pub_state->privileged = false;
|
|
pub_state->fd = create_pipe_sock(
|
|
lp_winbindd_socket_directory(), WINBINDD_SOCKET_NAME, 0755);
|
|
if (pub_state->fd == -1) {
|
|
goto failed;
|
|
}
|
|
rc = listen(pub_state->fd, 5);
|
|
if (rc < 0) {
|
|
goto failed;
|
|
}
|
|
|
|
fde = tevent_add_fd(winbind_event_context(), pub_state, pub_state->fd,
|
|
TEVENT_FD_READ, winbindd_listen_fde_handler,
|
|
pub_state);
|
|
if (fde == NULL) {
|
|
close(pub_state->fd);
|
|
goto failed;
|
|
}
|
|
tevent_fd_set_auto_close(fde);
|
|
|
|
priv_state = talloc(winbind_event_context(),
|
|
struct winbindd_listen_state);
|
|
if (!priv_state) {
|
|
goto failed;
|
|
}
|
|
|
|
socket_path = get_winbind_priv_pipe_dir();
|
|
if (socket_path == NULL) {
|
|
goto failed;
|
|
}
|
|
|
|
priv_state->privileged = true;
|
|
priv_state->fd = create_pipe_sock(
|
|
socket_path, WINBINDD_SOCKET_NAME, 0750);
|
|
TALLOC_FREE(socket_path);
|
|
if (priv_state->fd == -1) {
|
|
goto failed;
|
|
}
|
|
rc = listen(priv_state->fd, 5);
|
|
if (rc < 0) {
|
|
goto failed;
|
|
}
|
|
|
|
fde = tevent_add_fd(winbind_event_context(), priv_state,
|
|
priv_state->fd, TEVENT_FD_READ,
|
|
winbindd_listen_fde_handler, priv_state);
|
|
if (fde == NULL) {
|
|
close(priv_state->fd);
|
|
goto failed;
|
|
}
|
|
tevent_fd_set_auto_close(fde);
|
|
|
|
winbindd_scrub_clients_handler(winbind_event_context(), NULL,
|
|
timeval_current(), NULL);
|
|
return true;
|
|
failed:
|
|
TALLOC_FREE(pub_state);
|
|
TALLOC_FREE(priv_state);
|
|
return false;
|
|
}
|
|
|
|
bool winbindd_use_idmap_cache(void)
|
|
{
|
|
return !opt_nocache;
|
|
}
|
|
|
|
bool winbindd_use_cache(void)
|
|
{
|
|
return !opt_nocache;
|
|
}
|
|
|
|
static void winbindd_register_handlers(struct messaging_context *msg_ctx,
|
|
bool foreground)
|
|
{
|
|
NTSTATUS status;
|
|
/* Setup signal handlers */
|
|
|
|
if (!winbindd_setup_sig_term_handler(true))
|
|
exit(1);
|
|
if (!winbindd_setup_stdin_handler(true, foreground))
|
|
exit(1);
|
|
if (!winbindd_setup_sig_hup_handler(NULL))
|
|
exit(1);
|
|
if (!winbindd_setup_sig_chld_handler())
|
|
exit(1);
|
|
if (!winbindd_setup_sig_usr2_handler())
|
|
exit(1);
|
|
|
|
CatchSignal(SIGPIPE, SIG_IGN); /* Ignore sigpipe */
|
|
|
|
/*
|
|
* Ensure all cache and idmap caches are consistent
|
|
* and initialized before we startup.
|
|
*/
|
|
if (!winbindd_cache_validate_and_initialize()) {
|
|
exit(1);
|
|
}
|
|
|
|
/* get broadcast messages */
|
|
|
|
if (!serverid_register(messaging_server_id(msg_ctx),
|
|
FLAG_MSG_GENERAL |
|
|
FLAG_MSG_WINBIND |
|
|
FLAG_MSG_DBWRAP)) {
|
|
DEBUG(1, ("Could not register myself in serverid.tdb\n"));
|
|
exit(1);
|
|
}
|
|
|
|
/* React on 'smbcontrol winbindd reload-config' in the same way
|
|
as to SIGHUP signal */
|
|
messaging_register(msg_ctx, NULL,
|
|
MSG_SMB_CONF_UPDATED, msg_reload_services);
|
|
messaging_register(msg_ctx, NULL,
|
|
MSG_SHUTDOWN, msg_shutdown);
|
|
|
|
/* Handle online/offline messages. */
|
|
messaging_register(msg_ctx, NULL,
|
|
MSG_WINBIND_OFFLINE, winbind_msg_offline);
|
|
messaging_register(msg_ctx, NULL,
|
|
MSG_WINBIND_ONLINE, winbind_msg_online);
|
|
messaging_register(msg_ctx, NULL,
|
|
MSG_WINBIND_ONLINESTATUS, winbind_msg_onlinestatus);
|
|
|
|
/* Handle domain online/offline messages for domains */
|
|
messaging_register(winbind_messaging_context(), NULL,
|
|
MSG_WINBIND_DOMAIN_OFFLINE, winbind_msg_domain_offline);
|
|
messaging_register(winbind_messaging_context(), NULL,
|
|
MSG_WINBIND_DOMAIN_ONLINE, winbind_msg_domain_online);
|
|
|
|
messaging_register(msg_ctx, NULL,
|
|
MSG_DUMP_EVENT_LIST, winbind_msg_dump_event_list);
|
|
|
|
messaging_register(msg_ctx, NULL,
|
|
MSG_WINBIND_VALIDATE_CACHE,
|
|
winbind_msg_validate_cache);
|
|
|
|
messaging_register(msg_ctx, NULL,
|
|
MSG_WINBIND_DUMP_DOMAIN_LIST,
|
|
winbind_msg_dump_domain_list);
|
|
|
|
messaging_register(msg_ctx, NULL,
|
|
MSG_WINBIND_IP_DROPPED,
|
|
winbind_msg_ip_dropped_parent);
|
|
|
|
/* Register handler for MSG_DEBUG. */
|
|
messaging_register(msg_ctx, NULL,
|
|
MSG_DEBUG,
|
|
winbind_msg_debug);
|
|
|
|
netsamlogon_cache_init(); /* Non-critical */
|
|
|
|
/* clear the cached list of trusted domains */
|
|
|
|
wcache_tdc_clear();
|
|
|
|
if (!init_domain_list()) {
|
|
DEBUG(0,("unable to initialize domain list\n"));
|
|
exit(1);
|
|
}
|
|
|
|
init_idmap_child();
|
|
init_locator_child();
|
|
|
|
smb_nscd_flush_user_cache();
|
|
smb_nscd_flush_group_cache();
|
|
|
|
if (lp_allow_trusted_domains()) {
|
|
if (tevent_add_timer(winbind_event_context(), NULL, timeval_zero(),
|
|
rescan_trusted_domains, NULL) == NULL) {
|
|
DEBUG(0, ("Could not trigger rescan_trusted_domains()\n"));
|
|
exit(1);
|
|
}
|
|
}
|
|
|
|
status = wb_irpc_register();
|
|
|
|
if (!NT_STATUS_IS_OK(status)) {
|
|
DEBUG(0, ("Could not register IRPC handlers\n"));
|
|
exit(1);
|
|
}
|
|
}
|
|
|
|
struct winbindd_addrchanged_state {
|
|
struct addrchange_context *ctx;
|
|
struct tevent_context *ev;
|
|
struct messaging_context *msg_ctx;
|
|
};
|
|
|
|
static void winbindd_addr_changed(struct tevent_req *req);
|
|
|
|
static void winbindd_init_addrchange(TALLOC_CTX *mem_ctx,
|
|
struct tevent_context *ev,
|
|
struct messaging_context *msg_ctx)
|
|
{
|
|
struct winbindd_addrchanged_state *state;
|
|
struct tevent_req *req;
|
|
NTSTATUS status;
|
|
|
|
state = talloc(mem_ctx, struct winbindd_addrchanged_state);
|
|
if (state == NULL) {
|
|
DEBUG(10, ("talloc failed\n"));
|
|
return;
|
|
}
|
|
state->ev = ev;
|
|
state->msg_ctx = msg_ctx;
|
|
|
|
status = addrchange_context_create(state, &state->ctx);
|
|
if (!NT_STATUS_IS_OK(status)) {
|
|
DEBUG(10, ("addrchange_context_create failed: %s\n",
|
|
nt_errstr(status)));
|
|
TALLOC_FREE(state);
|
|
return;
|
|
}
|
|
req = addrchange_send(state, ev, state->ctx);
|
|
if (req == NULL) {
|
|
DEBUG(0, ("addrchange_send failed\n"));
|
|
TALLOC_FREE(state);
|
|
return;
|
|
}
|
|
tevent_req_set_callback(req, winbindd_addr_changed, state);
|
|
}
|
|
|
|
static void winbindd_addr_changed(struct tevent_req *req)
|
|
{
|
|
struct winbindd_addrchanged_state *state = tevent_req_callback_data(
|
|
req, struct winbindd_addrchanged_state);
|
|
enum addrchange_type type;
|
|
struct sockaddr_storage addr;
|
|
NTSTATUS status;
|
|
|
|
status = addrchange_recv(req, &type, &addr);
|
|
TALLOC_FREE(req);
|
|
if (!NT_STATUS_IS_OK(status)) {
|
|
DEBUG(10, ("addrchange_recv failed: %s, stop listening\n",
|
|
nt_errstr(status)));
|
|
TALLOC_FREE(state);
|
|
return;
|
|
}
|
|
if (type == ADDRCHANGE_DEL) {
|
|
char addrstr[INET6_ADDRSTRLEN];
|
|
DATA_BLOB blob;
|
|
|
|
print_sockaddr(addrstr, sizeof(addrstr), &addr);
|
|
|
|
DEBUG(3, ("winbindd: kernel (AF_NETLINK) dropped ip %s\n",
|
|
addrstr));
|
|
|
|
blob = data_blob_const(addrstr, strlen(addrstr)+1);
|
|
|
|
status = messaging_send(state->msg_ctx,
|
|
messaging_server_id(state->msg_ctx),
|
|
MSG_WINBIND_IP_DROPPED, &blob);
|
|
if (!NT_STATUS_IS_OK(status)) {
|
|
DEBUG(10, ("messaging_send failed: %s - ignoring\n",
|
|
nt_errstr(status)));
|
|
}
|
|
}
|
|
req = addrchange_send(state, state->ev, state->ctx);
|
|
if (req == NULL) {
|
|
DEBUG(0, ("addrchange_send failed\n"));
|
|
TALLOC_FREE(state);
|
|
return;
|
|
}
|
|
tevent_req_set_callback(req, winbindd_addr_changed, state);
|
|
}
|
|
|
|
/* Main function */
|
|
|
|
int main(int argc, const char **argv)
|
|
{
|
|
static bool is_daemon = False;
|
|
static bool Fork = True;
|
|
static bool log_stdout = False;
|
|
static bool no_process_group = False;
|
|
enum {
|
|
OPT_DAEMON = 1000,
|
|
OPT_FORK,
|
|
OPT_NO_PROCESS_GROUP,
|
|
OPT_LOG_STDOUT
|
|
};
|
|
struct poptOption long_options[] = {
|
|
POPT_AUTOHELP
|
|
{ "stdout", 'S', POPT_ARG_NONE, NULL, OPT_LOG_STDOUT, "Log to stdout" },
|
|
{ "foreground", 'F', POPT_ARG_NONE, NULL, OPT_FORK, "Daemon in foreground mode" },
|
|
{ "no-process-group", 0, POPT_ARG_NONE, NULL, OPT_NO_PROCESS_GROUP, "Don't create a new process group" },
|
|
{ "daemon", 'D', POPT_ARG_NONE, NULL, OPT_DAEMON, "Become a daemon (default)" },
|
|
{ "interactive", 'i', POPT_ARG_NONE, NULL, 'i', "Interactive mode" },
|
|
{ "no-caching", 'n', POPT_ARG_NONE, NULL, 'n', "Disable caching" },
|
|
POPT_COMMON_SAMBA
|
|
POPT_TABLEEND
|
|
};
|
|
poptContext pc;
|
|
int opt;
|
|
TALLOC_CTX *frame;
|
|
NTSTATUS status;
|
|
bool ok;
|
|
|
|
/*
|
|
* Do this before any other talloc operation
|
|
*/
|
|
talloc_enable_null_tracking();
|
|
frame = talloc_stackframe();
|
|
|
|
/*
|
|
* We want total control over the permissions on created files,
|
|
* so set our umask to 0.
|
|
*/
|
|
umask(0);
|
|
|
|
setup_logging("winbindd", DEBUG_DEFAULT_STDOUT);
|
|
|
|
/* glibc (?) likes to print "User defined signal 1" and exit if a
|
|
SIGUSR[12] is received before a handler is installed */
|
|
|
|
CatchSignal(SIGUSR1, SIG_IGN);
|
|
CatchSignal(SIGUSR2, SIG_IGN);
|
|
|
|
fault_setup();
|
|
dump_core_setup("winbindd", lp_logfile(talloc_tos()));
|
|
|
|
smb_init_locale();
|
|
|
|
/* Initialise for running in non-root mode */
|
|
|
|
sec_init();
|
|
|
|
set_remote_machine_name("winbindd", False);
|
|
|
|
/* Set environment variable so we don't recursively call ourselves.
|
|
This may also be useful interactively. */
|
|
|
|
if ( !winbind_off() ) {
|
|
DEBUG(0,("Failed to disable recusive winbindd calls. Exiting.\n"));
|
|
exit(1);
|
|
}
|
|
|
|
/* Initialise samba/rpc client stuff */
|
|
|
|
pc = poptGetContext("winbindd", argc, argv, long_options, 0);
|
|
|
|
while ((opt = poptGetNextOpt(pc)) != -1) {
|
|
switch (opt) {
|
|
/* Don't become a daemon */
|
|
case OPT_DAEMON:
|
|
is_daemon = True;
|
|
break;
|
|
case 'i':
|
|
interactive = True;
|
|
log_stdout = True;
|
|
Fork = False;
|
|
break;
|
|
case OPT_FORK:
|
|
Fork = false;
|
|
break;
|
|
case OPT_NO_PROCESS_GROUP:
|
|
no_process_group = true;
|
|
break;
|
|
case OPT_LOG_STDOUT:
|
|
log_stdout = true;
|
|
break;
|
|
case 'n':
|
|
opt_nocache = true;
|
|
break;
|
|
default:
|
|
d_fprintf(stderr, "\nInvalid option %s: %s\n\n",
|
|
poptBadOption(pc, 0), poptStrerror(opt));
|
|
poptPrintUsage(pc, stderr, 0);
|
|
exit(1);
|
|
}
|
|
}
|
|
|
|
/* We call dump_core_setup one more time because the command line can
|
|
* set the log file or the log-basename and this will influence where
|
|
* cores are stored. Without this call get_dyn_LOGFILEBASE will be
|
|
* the default value derived from build's prefix. For EOM this value
|
|
* is often not related to the path where winbindd is actually run
|
|
* in production.
|
|
*/
|
|
dump_core_setup("winbindd", lp_logfile(talloc_tos()));
|
|
if (is_daemon && interactive) {
|
|
d_fprintf(stderr,"\nERROR: "
|
|
"Option -i|--interactive is not allowed together with -D|--daemon\n\n");
|
|
poptPrintUsage(pc, stderr, 0);
|
|
exit(1);
|
|
}
|
|
|
|
if (log_stdout && Fork) {
|
|
d_fprintf(stderr, "\nERROR: "
|
|
"Can't log to stdout (-S) unless daemon is in foreground +(-F) or interactive (-i)\n\n");
|
|
poptPrintUsage(pc, stderr, 0);
|
|
exit(1);
|
|
}
|
|
|
|
poptFreeContext(pc);
|
|
|
|
if (!override_logfile) {
|
|
char *lfile = NULL;
|
|
if (asprintf(&lfile,"%s/log.winbindd",
|
|
get_dyn_LOGFILEBASE()) > 0) {
|
|
lp_set_logfile(lfile);
|
|
SAFE_FREE(lfile);
|
|
}
|
|
}
|
|
|
|
if (log_stdout) {
|
|
setup_logging("winbindd", DEBUG_STDOUT);
|
|
} else {
|
|
setup_logging("winbindd", DEBUG_FILE);
|
|
}
|
|
reopen_logs();
|
|
|
|
DEBUG(0,("winbindd version %s started.\n", samba_version_string()));
|
|
DEBUGADD(0,("%s\n", COPYRIGHT_STARTUP_MESSAGE));
|
|
|
|
if (!lp_load_initial_only(get_dyn_CONFIGFILE())) {
|
|
DEBUG(0, ("error opening config file '%s'\n", get_dyn_CONFIGFILE()));
|
|
exit(1);
|
|
}
|
|
/* After parsing the configuration file we setup the core path one more time
|
|
* as the log file might have been set in the configuration and cores's
|
|
* path is by default basename(lp_logfile()).
|
|
*/
|
|
dump_core_setup("winbindd", lp_logfile(talloc_tos()));
|
|
|
|
if (lp_server_role() == ROLE_ACTIVE_DIRECTORY_DC
|
|
&& !lp_parm_bool(-1, "server role check", "inhibit", false)) {
|
|
DEBUG(0, ("server role = 'active directory domain controller' not compatible with running the winbindd binary. \n"));
|
|
DEBUGADD(0, ("You should start 'samba' instead, and it will control starting the internal AD DC winbindd implementation, which is not the same as this one\n"));
|
|
exit(1);
|
|
}
|
|
|
|
if (!cluster_probe_ok()) {
|
|
exit(1);
|
|
}
|
|
|
|
/* Initialise messaging system */
|
|
|
|
if (winbind_messaging_context() == NULL) {
|
|
exit(1);
|
|
}
|
|
|
|
if (!reload_services_file(NULL)) {
|
|
DEBUG(0, ("error opening config file\n"));
|
|
exit(1);
|
|
}
|
|
|
|
ok = directory_create_or_exist(lp_lock_directory(), 0755);
|
|
if (!ok) {
|
|
DEBUG(0, ("Failed to create directory %s for lock files - %s\n",
|
|
lp_lock_directory(), strerror(errno)));
|
|
exit(1);
|
|
}
|
|
|
|
ok = directory_create_or_exist(lp_pid_directory(), 0755);
|
|
if (!ok) {
|
|
DEBUG(0, ("Failed to create directory %s for pid files - %s\n",
|
|
lp_pid_directory(), strerror(errno)));
|
|
exit(1);
|
|
}
|
|
|
|
/* Setup names. */
|
|
|
|
if (!init_names())
|
|
exit(1);
|
|
|
|
load_interfaces();
|
|
|
|
if (!secrets_init()) {
|
|
|
|
DEBUG(0,("Could not initialize domain trust account secrets. Giving up\n"));
|
|
return False;
|
|
}
|
|
|
|
status = rpccli_pre_open_netlogon_creds();
|
|
if (!NT_STATUS_IS_OK(status)) {
|
|
DEBUG(0, ("rpccli_pre_open_netlogon_creds() - %s\n",
|
|
nt_errstr(status)));
|
|
exit(1);
|
|
}
|
|
|
|
/* Unblock all signals we are interested in as they may have been
|
|
blocked by the parent process. */
|
|
|
|
BlockSignals(False, SIGINT);
|
|
BlockSignals(False, SIGQUIT);
|
|
BlockSignals(False, SIGTERM);
|
|
BlockSignals(False, SIGUSR1);
|
|
BlockSignals(False, SIGUSR2);
|
|
BlockSignals(False, SIGHUP);
|
|
BlockSignals(False, SIGCHLD);
|
|
|
|
if (!interactive)
|
|
become_daemon(Fork, no_process_group, log_stdout);
|
|
|
|
pidfile_create(lp_pid_directory(), "winbindd");
|
|
|
|
#if HAVE_SETPGID
|
|
/*
|
|
* If we're interactive we want to set our own process group for
|
|
* signal management.
|
|
*/
|
|
if (interactive && !no_process_group)
|
|
setpgid( (pid_t)0, (pid_t)0);
|
|
#endif
|
|
|
|
TimeInit();
|
|
|
|
/* Don't use winbindd_reinit_after_fork here as
|
|
* we're just starting up and haven't created any
|
|
* winbindd-specific resources we must free yet. JRA.
|
|
*/
|
|
|
|
status = reinit_after_fork(winbind_messaging_context(),
|
|
winbind_event_context(),
|
|
false, NULL);
|
|
if (!NT_STATUS_IS_OK(status)) {
|
|
exit_daemon("Winbindd reinit_after_fork() failed", map_errno_from_nt_status(status));
|
|
}
|
|
|
|
/*
|
|
* Do not initialize the parent-child-pipe before becoming
|
|
* a daemon: this is used to detect a died parent in the child
|
|
* process.
|
|
*/
|
|
status = init_before_fork();
|
|
if (!NT_STATUS_IS_OK(status)) {
|
|
exit_daemon(nt_errstr(status), map_errno_from_nt_status(status));
|
|
}
|
|
|
|
winbindd_register_handlers(winbind_messaging_context(), !Fork);
|
|
|
|
if (!messaging_parent_dgm_cleanup_init(winbind_messaging_context())) {
|
|
exit(1);
|
|
}
|
|
|
|
status = init_system_session_info();
|
|
if (!NT_STATUS_IS_OK(status)) {
|
|
exit_daemon("Winbindd failed to setup system user info", map_errno_from_nt_status(status));
|
|
}
|
|
|
|
rpc_lsarpc_init(NULL);
|
|
rpc_samr_init(NULL);
|
|
|
|
winbindd_init_addrchange(NULL, winbind_event_context(),
|
|
winbind_messaging_context());
|
|
|
|
/* setup listen sockets */
|
|
|
|
if (!winbindd_setup_listeners()) {
|
|
exit_daemon("Winbindd failed to setup listeners", EPIPE);
|
|
}
|
|
|
|
irpc_add_name(winbind_imessaging_context(), "winbind_server");
|
|
|
|
TALLOC_FREE(frame);
|
|
|
|
if (!interactive) {
|
|
daemon_ready("winbindd");
|
|
}
|
|
|
|
/* Loop waiting for requests */
|
|
while (1) {
|
|
frame = talloc_stackframe();
|
|
|
|
if (tevent_loop_once(winbind_event_context()) == -1) {
|
|
DEBUG(1, ("tevent_loop_once() failed: %s\n",
|
|
strerror(errno)));
|
|
return 1;
|
|
}
|
|
|
|
TALLOC_FREE(frame);
|
|
}
|
|
|
|
return 0;
|
|
}
|