mirror of
https://github.com/samba-team/samba.git
synced 2024-12-22 13:34:15 +03:00
e5a951325a
(This used to be commit 5c6c8e1fe9
)
1226 lines
30 KiB
C
1226 lines
30 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 "winbindd.h"
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#undef DBGC_CLASS
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#define DBGC_CLASS DBGC_WINBIND
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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 event_context *winbind_event_context(void)
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{
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static struct event_context *ctx;
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if (!ctx && !(ctx = event_context_init(NULL))) {
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smb_panic("Could not init winbind event context");
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}
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return ctx;
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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 *ctx;
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if (!ctx && !(ctx = messaging_init(NULL, server_id_self(),
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winbind_event_context()))) {
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smb_panic("Could not init winbind messaging context");
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}
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return ctx;
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}
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/* Reload configuration */
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static BOOL reload_services_file(void)
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{
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BOOL ret;
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if (lp_loaded()) {
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pstring fname;
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pstrcpy(fname,lp_configfile());
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if (file_exist(fname,NULL) && !strcsequal(fname,dyn_CONFIGFILE)) {
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pstrcpy(dyn_CONFIGFILE,fname);
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}
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}
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reopen_logs();
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ret = lp_load(dyn_CONFIGFILE,False,False,True,True);
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reopen_logs();
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load_interfaces();
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return(ret);
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}
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/**************************************************************************** **
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Handle a fault..
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**************************************************************************** */
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static void fault_quit(void)
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{
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dump_core();
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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\n",
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(unsigned long)tmp->pid, tmp->sock));
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}
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}
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}
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/* Print winbindd status to log file */
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static void print_winbindd_status(void)
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{
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winbindd_status();
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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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wcache_invalidate_cache();
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}
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/* Handle the signal by unlinking socket and exiting */
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static void terminate(void)
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{
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pstring path;
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/* Remove socket file */
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pstr_sprintf(path, "%s/%s",
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get_winbind_pipe_dir(), WINBINDD_SOCKET_NAME);
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unlink(path);
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idmap_close();
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trustdom_cache_shutdown();
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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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exit(0);
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}
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static BOOL do_sigterm;
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static void termination_handler(int signum)
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{
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do_sigterm = True;
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sys_select_signal(signum);
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}
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static BOOL do_sigusr2;
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static void sigusr2_handler(int signum)
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{
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do_sigusr2 = True;
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sys_select_signal(SIGUSR2);
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}
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static BOOL do_sighup;
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static void sighup_handler(int signum)
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{
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do_sighup = True;
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sys_select_signal(SIGHUP);
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}
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static BOOL do_sigchld;
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static void sigchld_handler(int signum)
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{
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do_sigchld = True;
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sys_select_signal(SIGCHLD);
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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();
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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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do_sigterm = True;
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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 ret;
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pid_t child_pid;
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struct sigaction act;
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struct sigaction oldact;
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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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CatchChild();
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child_pid = sys_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", child_pid));
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return;
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}
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/* child */
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/* install default SIGCHLD handler: validation code uses fork/waitpid */
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ZERO_STRUCT(act);
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act.sa_handler = SIG_DFL;
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#ifdef SA_RESTART
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/* We *want* SIGALRM to interrupt a system call. */
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act.sa_flags = SA_RESTART;
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#endif
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sigemptyset(&act.sa_mask);
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sigaddset(&act.sa_mask,SIGCHLD);
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sigaction(SIGCHLD,&act,&oldact);
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ret = (uint8)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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}
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static struct winbindd_dispatch_table {
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enum winbindd_cmd cmd;
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void (*fn)(struct winbindd_cli_state *state);
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const char *winbindd_cmd_name;
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} dispatch_table[] = {
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/* User functions */
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{ WINBINDD_GETPWNAM, winbindd_getpwnam, "GETPWNAM" },
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{ WINBINDD_GETPWUID, winbindd_getpwuid, "GETPWUID" },
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{ WINBINDD_SETPWENT, winbindd_setpwent, "SETPWENT" },
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{ WINBINDD_ENDPWENT, winbindd_endpwent, "ENDPWENT" },
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{ WINBINDD_GETPWENT, winbindd_getpwent, "GETPWENT" },
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{ WINBINDD_GETGROUPS, winbindd_getgroups, "GETGROUPS" },
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{ WINBINDD_GETUSERSIDS, winbindd_getusersids, "GETUSERSIDS" },
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{ WINBINDD_GETUSERDOMGROUPS, winbindd_getuserdomgroups,
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"GETUSERDOMGROUPS" },
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/* Group functions */
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{ WINBINDD_GETGRNAM, winbindd_getgrnam, "GETGRNAM" },
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{ WINBINDD_GETGRGID, winbindd_getgrgid, "GETGRGID" },
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{ WINBINDD_SETGRENT, winbindd_setgrent, "SETGRENT" },
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{ WINBINDD_ENDGRENT, winbindd_endgrent, "ENDGRENT" },
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{ WINBINDD_GETGRENT, winbindd_getgrent, "GETGRENT" },
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{ WINBINDD_GETGRLST, winbindd_getgrent, "GETGRLST" },
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/* PAM auth functions */
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{ WINBINDD_PAM_AUTH, winbindd_pam_auth, "PAM_AUTH" },
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{ WINBINDD_PAM_AUTH_CRAP, winbindd_pam_auth_crap, "AUTH_CRAP" },
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{ WINBINDD_PAM_CHAUTHTOK, winbindd_pam_chauthtok, "CHAUTHTOK" },
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{ WINBINDD_PAM_LOGOFF, winbindd_pam_logoff, "PAM_LOGOFF" },
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{ WINBINDD_PAM_CHNG_PSWD_AUTH_CRAP, winbindd_pam_chng_pswd_auth_crap, "CHNG_PSWD_AUTH_CRAP" },
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/* Enumeration functions */
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{ WINBINDD_LIST_USERS, winbindd_list_users, "LIST_USERS" },
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{ WINBINDD_LIST_GROUPS, winbindd_list_groups, "LIST_GROUPS" },
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{ WINBINDD_LIST_TRUSTDOM, winbindd_list_trusted_domains,
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"LIST_TRUSTDOM" },
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{ WINBINDD_SHOW_SEQUENCE, winbindd_show_sequence, "SHOW_SEQUENCE" },
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/* SID related functions */
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{ WINBINDD_LOOKUPSID, winbindd_lookupsid, "LOOKUPSID" },
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{ WINBINDD_LOOKUPNAME, winbindd_lookupname, "LOOKUPNAME" },
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{ WINBINDD_LOOKUPRIDS, winbindd_lookuprids, "LOOKUPRIDS" },
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/* Lookup related functions */
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{ WINBINDD_SID_TO_UID, winbindd_sid_to_uid, "SID_TO_UID" },
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{ WINBINDD_SID_TO_GID, winbindd_sid_to_gid, "SID_TO_GID" },
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{ WINBINDD_UID_TO_SID, winbindd_uid_to_sid, "UID_TO_SID" },
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{ WINBINDD_GID_TO_SID, winbindd_gid_to_sid, "GID_TO_SID" },
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#if 0 /* DISABLED until we fix the interface in Samba 3.0.26 --jerry */
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{ WINBINDD_SIDS_TO_XIDS, winbindd_sids_to_unixids, "SIDS_TO_XIDS" },
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#endif /* end DISABLED */
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{ WINBINDD_ALLOCATE_UID, winbindd_allocate_uid, "ALLOCATE_UID" },
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{ WINBINDD_ALLOCATE_GID, winbindd_allocate_gid, "ALLOCATE_GID" },
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{ WINBINDD_SET_MAPPING, winbindd_set_mapping, "SET_MAPPING" },
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{ WINBINDD_SET_HWM, winbindd_set_hwm, "SET_HWMS" },
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/* Miscellaneous */
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{ WINBINDD_DUMP_MAPS, winbindd_dump_maps, "DUMP_MAPS" },
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{ WINBINDD_CHECK_MACHACC, winbindd_check_machine_acct, "CHECK_MACHACC" },
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{ WINBINDD_PING, winbindd_ping, "PING" },
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{ WINBINDD_INFO, winbindd_info, "INFO" },
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{ WINBINDD_INTERFACE_VERSION, winbindd_interface_version,
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"INTERFACE_VERSION" },
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{ WINBINDD_DOMAIN_NAME, winbindd_domain_name, "DOMAIN_NAME" },
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{ WINBINDD_DOMAIN_INFO, winbindd_domain_info, "DOMAIN_INFO" },
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{ WINBINDD_NETBIOS_NAME, winbindd_netbios_name, "NETBIOS_NAME" },
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{ WINBINDD_PRIV_PIPE_DIR, winbindd_priv_pipe_dir,
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"WINBINDD_PRIV_PIPE_DIR" },
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{ WINBINDD_GETDCNAME, winbindd_getdcname, "GETDCNAME" },
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{ WINBINDD_DSGETDCNAME, winbindd_dsgetdcname, "DSGETDCNAME" },
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/* Credential cache access */
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{ WINBINDD_CCACHE_NTLMAUTH, winbindd_ccache_ntlm_auth, "NTLMAUTH" },
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/* WINS functions */
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{ WINBINDD_WINS_BYNAME, winbindd_wins_byname, "WINS_BYNAME" },
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{ WINBINDD_WINS_BYIP, winbindd_wins_byip, "WINS_BYIP" },
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/* End of list */
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{ WINBINDD_NUM_CMDS, NULL, "NONE" }
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};
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static void process_request(struct winbindd_cli_state *state)
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{
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struct winbindd_dispatch_table *table = dispatch_table;
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/* Free response data - we may be interrupted and receive another
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command before being able to send this data off. */
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SAFE_FREE(state->response.extra_data.data);
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ZERO_STRUCT(state->response);
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state->response.result = WINBINDD_PENDING;
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state->response.length = sizeof(struct winbindd_response);
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state->mem_ctx = talloc_init("winbind request");
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if (state->mem_ctx == NULL)
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return;
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/* Remember who asked us. */
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state->pid = state->request.pid;
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/* Process command */
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for (table = dispatch_table; table->fn; table++) {
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if (state->request.cmd == table->cmd) {
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DEBUG(10,("process_request: request fn %s\n",
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table->winbindd_cmd_name ));
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table->fn(state);
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break;
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}
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}
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if (!table->fn) {
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DEBUG(10,("process_request: unknown request fn number %d\n",
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(int)state->request.cmd ));
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request_error(state);
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}
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}
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/*
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* A list of file descriptors being monitored by select in the main processing
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* loop. fd_event->handler is called whenever the socket is readable/writable.
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*/
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static struct fd_event *fd_events = NULL;
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void add_fd_event(struct fd_event *ev)
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{
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struct fd_event *match;
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/* only add unique fd_event structs */
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for (match=fd_events; match; match=match->next ) {
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#ifdef DEVELOPER
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SMB_ASSERT( match != ev );
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#else
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if ( match == ev )
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return;
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#endif
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}
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DLIST_ADD(fd_events, ev);
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}
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void remove_fd_event(struct fd_event *ev)
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{
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DLIST_REMOVE(fd_events, ev);
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}
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/*
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* Handler for fd_events to complete a read/write request, set up by
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* setup_async_read/setup_async_write.
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*/
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static void rw_callback(struct fd_event *event, int flags)
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{
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size_t todo;
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ssize_t done = 0;
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todo = event->length - event->done;
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if (event->flags & EVENT_FD_WRITE) {
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SMB_ASSERT(flags == EVENT_FD_WRITE);
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done = sys_write(event->fd,
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&((char *)event->data)[event->done],
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todo);
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if (done <= 0) {
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event->flags = 0;
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event->finished(event->private_data, False);
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return;
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}
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}
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if (event->flags & EVENT_FD_READ) {
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SMB_ASSERT(flags == EVENT_FD_READ);
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done = sys_read(event->fd, &((char *)event->data)[event->done],
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todo);
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if (done <= 0) {
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event->flags = 0;
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event->finished(event->private_data, False);
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return;
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}
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}
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event->done += done;
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if (event->done == event->length) {
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event->flags = 0;
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event->finished(event->private_data, True);
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}
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}
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/*
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* Request an async read/write on a fd_event structure. (*finished) is called
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* when the request is completed or an error had occurred.
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*/
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void setup_async_read(struct fd_event *event, void *data, size_t length,
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void (*finished)(void *private_data, BOOL success),
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void *private_data)
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{
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SMB_ASSERT(event->flags == 0);
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event->data = data;
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event->length = length;
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event->done = 0;
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event->handler = rw_callback;
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event->finished = finished;
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event->private_data = private_data;
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event->flags = EVENT_FD_READ;
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}
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void setup_async_write(struct fd_event *event, void *data, size_t length,
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void (*finished)(void *private_data, BOOL success),
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void *private_data)
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{
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SMB_ASSERT(event->flags == 0);
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event->data = data;
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event->length = length;
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event->done = 0;
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event->handler = rw_callback;
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event->finished = finished;
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event->private_data = private_data;
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event->flags = EVENT_FD_WRITE;
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}
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/*
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* This is the main event loop of winbind requests. It goes through a
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* state-machine of 3 read/write requests, 4 if you have extra data to send.
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|
*
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* An idle winbind client has a read request of 4 bytes outstanding,
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* 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_len_recv(void *private_data, BOOL success);
|
|
static void request_recv(void *private_data, BOOL success);
|
|
static void request_main_recv(void *private_data, BOOL success);
|
|
static void request_finished(struct winbindd_cli_state *state);
|
|
void request_finished_cont(void *private_data, BOOL success);
|
|
static void response_main_sent(void *private_data, BOOL success);
|
|
static void response_extra_sent(void *private_data, BOOL success);
|
|
|
|
static void response_extra_sent(void *private_data, BOOL success)
|
|
{
|
|
struct winbindd_cli_state *state =
|
|
talloc_get_type_abort(private_data, struct winbindd_cli_state);
|
|
|
|
if (state->mem_ctx != NULL) {
|
|
talloc_destroy(state->mem_ctx);
|
|
state->mem_ctx = NULL;
|
|
}
|
|
|
|
if (!success) {
|
|
state->finished = True;
|
|
return;
|
|
}
|
|
|
|
SAFE_FREE(state->request.extra_data.data);
|
|
SAFE_FREE(state->response.extra_data.data);
|
|
|
|
setup_async_read(&state->fd_event, &state->request, sizeof(uint32),
|
|
request_len_recv, state);
|
|
}
|
|
|
|
static void response_main_sent(void *private_data, BOOL success)
|
|
{
|
|
struct winbindd_cli_state *state =
|
|
talloc_get_type_abort(private_data, struct winbindd_cli_state);
|
|
|
|
if (!success) {
|
|
state->finished = True;
|
|
return;
|
|
}
|
|
|
|
if (state->response.length == sizeof(state->response)) {
|
|
if (state->mem_ctx != NULL) {
|
|
talloc_destroy(state->mem_ctx);
|
|
state->mem_ctx = NULL;
|
|
}
|
|
|
|
setup_async_read(&state->fd_event, &state->request,
|
|
sizeof(uint32), request_len_recv, state);
|
|
return;
|
|
}
|
|
|
|
setup_async_write(&state->fd_event, state->response.extra_data.data,
|
|
state->response.length - sizeof(state->response),
|
|
response_extra_sent, state);
|
|
}
|
|
|
|
static void request_finished(struct winbindd_cli_state *state)
|
|
{
|
|
setup_async_write(&state->fd_event, &state->response,
|
|
sizeof(state->response), response_main_sent, state);
|
|
}
|
|
|
|
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);
|
|
}
|
|
|
|
void request_finished_cont(void *private_data, BOOL success)
|
|
{
|
|
struct winbindd_cli_state *state =
|
|
talloc_get_type_abort(private_data, struct winbindd_cli_state);
|
|
|
|
if (success)
|
|
request_ok(state);
|
|
else
|
|
request_error(state);
|
|
}
|
|
|
|
static void request_len_recv(void *private_data, BOOL success)
|
|
{
|
|
struct winbindd_cli_state *state =
|
|
talloc_get_type_abort(private_data, struct winbindd_cli_state);
|
|
|
|
if (!success) {
|
|
state->finished = True;
|
|
return;
|
|
}
|
|
|
|
if (*(uint32 *)(&state->request) != sizeof(state->request)) {
|
|
DEBUG(0,("request_len_recv: Invalid request size received: %d\n",
|
|
*(uint32 *)(&state->request)));
|
|
state->finished = True;
|
|
return;
|
|
}
|
|
|
|
setup_async_read(&state->fd_event, (uint32 *)(&state->request)+1,
|
|
sizeof(state->request) - sizeof(uint32),
|
|
request_main_recv, state);
|
|
}
|
|
|
|
static void request_main_recv(void *private_data, BOOL success)
|
|
{
|
|
struct winbindd_cli_state *state =
|
|
talloc_get_type_abort(private_data, struct winbindd_cli_state);
|
|
|
|
if (!success) {
|
|
state->finished = True;
|
|
return;
|
|
}
|
|
|
|
if (state->request.extra_len == 0) {
|
|
state->request.extra_data.data = NULL;
|
|
request_recv(state, True);
|
|
return;
|
|
}
|
|
|
|
if ((!state->privileged) &&
|
|
(state->request.extra_len > WINBINDD_MAX_EXTRA_DATA)) {
|
|
DEBUG(3, ("Got request with %d bytes extra data on "
|
|
"unprivileged socket\n", (int)state->request.extra_len));
|
|
state->request.extra_data.data = NULL;
|
|
state->finished = True;
|
|
return;
|
|
}
|
|
|
|
state->request.extra_data.data =
|
|
SMB_MALLOC_ARRAY(char, state->request.extra_len + 1);
|
|
|
|
if (state->request.extra_data.data == NULL) {
|
|
DEBUG(0, ("malloc failed\n"));
|
|
state->finished = True;
|
|
return;
|
|
}
|
|
|
|
/* Ensure null termination */
|
|
state->request.extra_data.data[state->request.extra_len] = '\0';
|
|
|
|
setup_async_read(&state->fd_event, state->request.extra_data.data,
|
|
state->request.extra_len, request_recv, state);
|
|
}
|
|
|
|
static void request_recv(void *private_data, BOOL success)
|
|
{
|
|
struct winbindd_cli_state *state =
|
|
talloc_get_type_abort(private_data, struct winbindd_cli_state);
|
|
|
|
if (!success) {
|
|
state->finished = True;
|
|
return;
|
|
}
|
|
|
|
process_request(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;
|
|
socklen_t len;
|
|
int sock;
|
|
|
|
/* Accept connection */
|
|
|
|
len = sizeof(sunaddr);
|
|
|
|
do {
|
|
sock = accept(listen_sock, (struct sockaddr *)&sunaddr, &len);
|
|
} while (sock == -1 && errno == EINTR);
|
|
|
|
if (sock == -1)
|
|
return;
|
|
|
|
DEBUG(6,("accepted socket %d\n", sock));
|
|
|
|
/* Create new connection structure */
|
|
|
|
if ((state = TALLOC_ZERO_P(NULL, struct winbindd_cli_state)) == NULL) {
|
|
close(sock);
|
|
return;
|
|
}
|
|
|
|
state->sock = sock;
|
|
|
|
state->last_access = time(NULL);
|
|
|
|
state->privileged = privileged;
|
|
|
|
state->fd_event.fd = state->sock;
|
|
state->fd_event.flags = 0;
|
|
add_fd_event(&state->fd_event);
|
|
|
|
setup_async_read(&state->fd_event, &state->request, sizeof(uint32),
|
|
request_len_recv, state);
|
|
|
|
/* Add to connection list */
|
|
|
|
winbindd_add_client(state);
|
|
}
|
|
|
|
/* Remove a client connection from client connection list */
|
|
|
|
static void remove_client(struct winbindd_cli_state *state)
|
|
{
|
|
/* It's a dead client - hold a funeral */
|
|
|
|
if (state == NULL) {
|
|
return;
|
|
}
|
|
|
|
/* Close socket */
|
|
|
|
close(state->sock);
|
|
|
|
/* Free any getent state */
|
|
|
|
free_getent_state(state->getpwent_state);
|
|
free_getent_state(state->getgrent_state);
|
|
|
|
/* We may have some extra data that was not freed if the client was
|
|
killed unexpectedly */
|
|
|
|
SAFE_FREE(state->response.extra_data.data);
|
|
|
|
if (state->mem_ctx != NULL) {
|
|
talloc_destroy(state->mem_ctx);
|
|
state->mem_ctx = NULL;
|
|
}
|
|
|
|
remove_fd_event(&state->fd_event);
|
|
|
|
/* Remove from list and free */
|
|
|
|
winbindd_remove_client(state);
|
|
TALLOC_FREE(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;
|
|
time_t last_access = 0;
|
|
int nidle = 0;
|
|
|
|
for (state = winbindd_client_list(); state; state = state->next) {
|
|
if (state->response.result != WINBINDD_PENDING &&
|
|
!state->getpwent_state && !state->getgrent_state) {
|
|
nidle++;
|
|
if (!last_access || state->last_access < last_access) {
|
|
last_access = state->last_access;
|
|
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;
|
|
}
|
|
|
|
/* Process incoming clients on listen_sock. We use a tricky non-blocking,
|
|
non-forking, non-threaded model which allows us to handle many
|
|
simultaneous connections while remaining impervious to many denial of
|
|
service attacks. */
|
|
|
|
static void process_loop(void)
|
|
{
|
|
struct winbindd_cli_state *state;
|
|
struct fd_event *ev;
|
|
fd_set r_fds, w_fds;
|
|
int maxfd, listen_sock, listen_priv_sock, selret;
|
|
struct timeval timeout, ev_timeout;
|
|
|
|
/* Open Sockets here to get stuff going ASAP */
|
|
listen_sock = open_winbindd_socket();
|
|
listen_priv_sock = open_winbindd_priv_socket();
|
|
|
|
if (listen_sock == -1 || listen_priv_sock == -1) {
|
|
perror("open_winbind_socket");
|
|
exit(1);
|
|
}
|
|
|
|
/* We'll be doing this a lot */
|
|
|
|
/* Handle messages */
|
|
|
|
message_dispatch(winbind_messaging_context());
|
|
|
|
run_events(winbind_event_context(), 0, NULL, NULL);
|
|
|
|
/* refresh the trusted domain cache */
|
|
|
|
rescan_trusted_domains();
|
|
|
|
/* Initialise fd lists for select() */
|
|
|
|
maxfd = MAX(listen_sock, listen_priv_sock);
|
|
|
|
FD_ZERO(&r_fds);
|
|
FD_ZERO(&w_fds);
|
|
FD_SET(listen_sock, &r_fds);
|
|
FD_SET(listen_priv_sock, &r_fds);
|
|
|
|
timeout.tv_sec = WINBINDD_ESTABLISH_LOOP;
|
|
timeout.tv_usec = 0;
|
|
|
|
/* Check for any event timeouts. */
|
|
if (get_timed_events_timeout(winbind_event_context(), &ev_timeout)) {
|
|
timeout = timeval_min(&timeout, &ev_timeout);
|
|
}
|
|
|
|
/* Set up client readers and writers */
|
|
|
|
state = winbindd_client_list();
|
|
|
|
while (state) {
|
|
|
|
struct winbindd_cli_state *next = state->next;
|
|
|
|
/* Dispose of client connection if it is marked as
|
|
finished */
|
|
|
|
if (state->finished)
|
|
remove_client(state);
|
|
|
|
state = next;
|
|
}
|
|
|
|
for (ev = fd_events; ev; ev = ev->next) {
|
|
if (ev->flags & EVENT_FD_READ) {
|
|
FD_SET(ev->fd, &r_fds);
|
|
maxfd = MAX(ev->fd, maxfd);
|
|
}
|
|
if (ev->flags & EVENT_FD_WRITE) {
|
|
FD_SET(ev->fd, &w_fds);
|
|
maxfd = MAX(ev->fd, maxfd);
|
|
}
|
|
}
|
|
|
|
/* Call select */
|
|
|
|
selret = sys_select(maxfd + 1, &r_fds, &w_fds, NULL, &timeout);
|
|
|
|
if (selret == 0) {
|
|
goto no_fds_ready;
|
|
}
|
|
|
|
if (selret == -1) {
|
|
if (errno == EINTR) {
|
|
goto no_fds_ready;
|
|
}
|
|
|
|
/* Select error, something is badly wrong */
|
|
|
|
perror("select");
|
|
exit(1);
|
|
}
|
|
|
|
/* selret > 0 */
|
|
|
|
ev = fd_events;
|
|
while (ev != NULL) {
|
|
struct fd_event *next = ev->next;
|
|
int flags = 0;
|
|
if (FD_ISSET(ev->fd, &r_fds))
|
|
flags |= EVENT_FD_READ;
|
|
if (FD_ISSET(ev->fd, &w_fds))
|
|
flags |= EVENT_FD_WRITE;
|
|
if (flags)
|
|
ev->handler(ev, flags);
|
|
ev = next;
|
|
}
|
|
|
|
if (FD_ISSET(listen_sock, &r_fds)) {
|
|
while (winbindd_num_clients() >
|
|
WINBINDD_MAX_SIMULTANEOUS_CLIENTS - 1) {
|
|
DEBUG(5,("winbindd: Exceeding %d client "
|
|
"connections, removing idle "
|
|
"connection.\n",
|
|
WINBINDD_MAX_SIMULTANEOUS_CLIENTS));
|
|
if (!remove_idle_client()) {
|
|
DEBUG(0,("winbindd: Exceeding %d "
|
|
"client connections, no idle "
|
|
"connection found\n",
|
|
WINBINDD_MAX_SIMULTANEOUS_CLIENTS));
|
|
break;
|
|
}
|
|
}
|
|
/* new, non-privileged connection */
|
|
new_connection(listen_sock, False);
|
|
}
|
|
|
|
if (FD_ISSET(listen_priv_sock, &r_fds)) {
|
|
while (winbindd_num_clients() >
|
|
WINBINDD_MAX_SIMULTANEOUS_CLIENTS - 1) {
|
|
DEBUG(5,("winbindd: Exceeding %d client "
|
|
"connections, removing idle "
|
|
"connection.\n",
|
|
WINBINDD_MAX_SIMULTANEOUS_CLIENTS));
|
|
if (!remove_idle_client()) {
|
|
DEBUG(0,("winbindd: Exceeding %d "
|
|
"client connections, no idle "
|
|
"connection found\n",
|
|
WINBINDD_MAX_SIMULTANEOUS_CLIENTS));
|
|
break;
|
|
}
|
|
}
|
|
/* new, privileged connection */
|
|
new_connection(listen_priv_sock, True);
|
|
}
|
|
|
|
no_fds_ready:
|
|
|
|
#if 0
|
|
winbindd_check_cache_size(time(NULL));
|
|
#endif
|
|
|
|
/* Check signal handling things */
|
|
|
|
if (do_sigterm)
|
|
terminate();
|
|
|
|
if (do_sighup) {
|
|
|
|
DEBUG(3, ("got SIGHUP\n"));
|
|
|
|
flush_caches();
|
|
reload_services_file();
|
|
|
|
do_sighup = False;
|
|
}
|
|
|
|
if (do_sigusr2) {
|
|
print_winbindd_status();
|
|
do_sigusr2 = False;
|
|
}
|
|
|
|
if (do_sigchld) {
|
|
pid_t pid;
|
|
|
|
do_sigchld = False;
|
|
|
|
while ((pid = sys_waitpid(-1, NULL, WNOHANG)) > 0) {
|
|
winbind_child_died(pid);
|
|
}
|
|
}
|
|
}
|
|
|
|
/* Main function */
|
|
|
|
int main(int argc, char **argv, char **envp)
|
|
{
|
|
pstring logfile;
|
|
static BOOL is_daemon = False;
|
|
static BOOL Fork = True;
|
|
static BOOL log_stdout = False;
|
|
static BOOL no_process_group = False;
|
|
struct poptOption long_options[] = {
|
|
POPT_AUTOHELP
|
|
{ "stdout", 'S', POPT_ARG_VAL, &log_stdout, True, "Log to stdout" },
|
|
{ "foreground", 'F', POPT_ARG_VAL, &Fork, False, "Daemon in foreground mode" },
|
|
{ "no-process-group", 0, POPT_ARG_VAL, &no_process_group, True, "Don't create a new process group" },
|
|
{ "daemon", 'D', POPT_ARG_NONE, NULL, 'D', "Become a daemon (default)" },
|
|
{ "interactive", 'i', POPT_ARG_NONE, NULL, 'i', "Interactive mode" },
|
|
{ "no-caching", 'n', POPT_ARG_VAL, &opt_nocache, True, "Disable caching" },
|
|
POPT_COMMON_SAMBA
|
|
POPT_TABLEEND
|
|
};
|
|
poptContext pc;
|
|
int opt;
|
|
|
|
/* 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((void (*)(void *))fault_quit );
|
|
dump_core_setup("winbindd");
|
|
|
|
load_case_tables();
|
|
|
|
/* 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, (const char **)argv, long_options, 0);
|
|
|
|
while ((opt = poptGetNextOpt(pc)) != -1) {
|
|
switch (opt) {
|
|
/* Don't become a daemon */
|
|
case 'D':
|
|
is_daemon = True;
|
|
break;
|
|
case 'i':
|
|
interactive = True;
|
|
log_stdout = True;
|
|
Fork = False;
|
|
break;
|
|
default:
|
|
d_fprintf(stderr, "\nInvalid option %s: %s\n\n",
|
|
poptBadOption(pc, 0), poptStrerror(opt));
|
|
poptPrintUsage(pc, stderr, 0);
|
|
exit(1);
|
|
}
|
|
}
|
|
|
|
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) {
|
|
pstr_sprintf(logfile, "%s/log.winbindd", dyn_LOGFILEBASE);
|
|
lp_set_logfile(logfile);
|
|
}
|
|
setup_logging("winbindd", log_stdout);
|
|
reopen_logs();
|
|
|
|
DEBUG(1, ("winbindd version %s started.\n%s\n",
|
|
SAMBA_VERSION_STRING,
|
|
COPYRIGHT_STARTUP_MESSAGE) );
|
|
|
|
if (!reload_services_file()) {
|
|
DEBUG(0, ("error opening config file\n"));
|
|
exit(1);
|
|
}
|
|
|
|
if (!directory_exist(lp_lockdir(), NULL)) {
|
|
mkdir(lp_lockdir(), 0755);
|
|
}
|
|
|
|
/* 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;
|
|
}
|
|
|
|
/* Enable netbios namecache */
|
|
|
|
namecache_enable();
|
|
|
|
/* Winbind daemon initialisation */
|
|
|
|
if ( ! NT_STATUS_IS_OK(idmap_init_cache()) ) {
|
|
DEBUG(1, ("Could not init idmap cache!\n"));
|
|
}
|
|
|
|
/* 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);
|
|
|
|
/* Setup signal handlers */
|
|
|
|
CatchSignal(SIGINT, termination_handler); /* Exit on these sigs */
|
|
CatchSignal(SIGQUIT, termination_handler);
|
|
CatchSignal(SIGTERM, termination_handler);
|
|
CatchSignal(SIGCHLD, sigchld_handler);
|
|
|
|
CatchSignal(SIGPIPE, SIG_IGN); /* Ignore sigpipe */
|
|
|
|
CatchSignal(SIGUSR2, sigusr2_handler); /* Debugging sigs */
|
|
CatchSignal(SIGHUP, sighup_handler);
|
|
|
|
if (!interactive)
|
|
become_daemon(Fork, no_process_group);
|
|
|
|
pidfile_create("winbindd");
|
|
|
|
/* Ensure all cache and idmap caches are consistent
|
|
before we startup. */
|
|
|
|
if (winbindd_validate_cache()) {
|
|
/* We have a bad cache, but luckily we
|
|
just deleted it. Restart ourselves */
|
|
int i;
|
|
/* Ensure we have no open low fd's. */
|
|
for (i = 3; i < 100; i++) {
|
|
close(i);
|
|
}
|
|
return execve(argv[0], argv, envp);
|
|
}
|
|
|
|
#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();
|
|
|
|
/* Initialise messaging system */
|
|
|
|
if (winbind_messaging_context() == NULL) {
|
|
DEBUG(0, ("unable to initialize messaging system\n"));
|
|
exit(1);
|
|
}
|
|
|
|
/* Initialize cache (ensure version is correct). */
|
|
if (!initialize_winbindd_cache()) {
|
|
exit(1);
|
|
}
|
|
|
|
/* React on 'smbcontrol winbindd reload-config' in the same way
|
|
as to SIGHUP signal */
|
|
messaging_register(winbind_messaging_context(), NULL,
|
|
MSG_SMB_CONF_UPDATED, msg_reload_services);
|
|
messaging_register(winbind_messaging_context(), NULL,
|
|
MSG_SHUTDOWN, msg_shutdown);
|
|
|
|
/* Handle online/offline messages. */
|
|
messaging_register(winbind_messaging_context(), NULL,
|
|
MSG_WINBIND_OFFLINE, winbind_msg_offline);
|
|
messaging_register(winbind_messaging_context(), NULL,
|
|
MSG_WINBIND_ONLINE, winbind_msg_online);
|
|
messaging_register(winbind_messaging_context(), NULL,
|
|
MSG_WINBIND_ONLINESTATUS, winbind_msg_onlinestatus);
|
|
|
|
messaging_register(winbind_messaging_context(), NULL,
|
|
MSG_DUMP_EVENT_LIST, winbind_msg_dump_event_list);
|
|
|
|
messaging_register(winbind_messaging_context(), NULL,
|
|
MSG_WINBIND_VALIDATE_CACHE,
|
|
winbind_msg_validate_cache);
|
|
|
|
netsamlogon_cache_init(); /* Non-critical */
|
|
|
|
/* clear the cached list of trusted domains */
|
|
|
|
wcache_tdc_clear();
|
|
|
|
if (!init_domain_list()) {
|
|
DEBUG(0,("unable to initalize domain list\n"));
|
|
exit(1);
|
|
}
|
|
|
|
init_idmap_child();
|
|
init_locator_child();
|
|
|
|
smb_nscd_flush_user_cache();
|
|
smb_nscd_flush_group_cache();
|
|
|
|
/* Loop waiting for requests */
|
|
|
|
while (1) {
|
|
TALLOC_CTX *frame = talloc_stackframe();
|
|
process_loop();
|
|
TALLOC_FREE(frame);
|
|
}
|
|
|
|
return 0;
|
|
}
|