NBT netbios routines and daemon - version 2
Copyright (C) Andrew Tridgell 1994-1998
Copyright (C) Jeremy Allison 1997-2002
- Copyright (C) Jelmer Vernooij 2002 (Conversion to popt)
+ Copyright (C) Jelmer Vernooij 2002,2003 (Conversion to popt)
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
- the Free Software Foundation; either version 2 of the License, or
+ the Free Software Foundation; either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
- along with this program; if not, write to the Free Software
- Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+ along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
int ClientDGRAM = -1;
int global_nmb_port = -1;
+extern BOOL rescan_listen_set;
+extern struct in_addr loopback_ip;
extern BOOL global_in_nmbd;
-/* are we running as a daemon ? */
-static BOOL is_daemon = False;
+extern BOOL override_logfile;
/* have we found LanMan clients yet? */
BOOL found_lm_clients = False;
time_t StartupTime = 0;
+struct event_context *nmbd_event_context(void)
+{
+ static struct event_context *ctx;
+
+ if (!ctx && !(ctx = event_context_init(NULL))) {
+ smb_panic("Could not init nmbd event context");
+ }
+ return ctx;
+}
+
+struct messaging_context *nmbd_messaging_context(void)
+{
+ static struct messaging_context *ctx;
+
+ if (!ctx && !(ctx = messaging_init(NULL, server_id_self(),
+ nmbd_event_context()))) {
+ smb_panic("Could not init nmbd messaging context");
+ }
+ return ctx;
+}
+
/**************************************************************************** **
Handle a SIGTERM in band.
**************************************************************************** */
DEBUG(0,("Got SIGTERM: going down...\n"));
/* Write out wins.dat file if samba is a WINS server */
- wins_write_database(False);
+ wins_write_database(0,False);
/* Remove all SELF registered names from WINS */
release_wins_names();
Handle a SHUTDOWN message from smbcontrol.
**************************************************************************** */
-static void nmbd_terminate(int msg_type, pid_t src, void *buf, size_t len)
+static void nmbd_terminate(struct messaging_context *msg,
+ void *private_data,
+ uint32_t msg_type,
+ struct server_id server_id,
+ DATA_BLOB *data)
{
terminate();
}
static void sig_term(int sig)
{
got_sig_term = 1;
- sys_select_signal();
+ sys_select_signal(SIGTERM);
}
/**************************************************************************** **
static void sig_hup(int sig)
{
reload_after_sighup = 1;
- sys_select_signal();
+ sys_select_signal(SIGHUP);
}
-/*******************************************************************
- Print out all talloc memory info.
-********************************************************************/
-
-void return_all_talloc_info(int msg_type, pid_t src_pid, void *buf, size_t len)
-{
- TALLOC_CTX *ctx = talloc_init("info context");
- char *info = NULL;
-
- if (!ctx)
- return;
-
- info = talloc_describe_all(ctx);
- if (info)
- DEBUG(10,(info));
- message_send_pid(src_pid, MSG_TALLOC_USAGE, info, info ? strlen(info) + 1 : 0, True);
- talloc_destroy(ctx);
-}
-
-#if DUMP_CORE
-/**************************************************************************** **
- Prepare to dump a core file - carefully!
- **************************************************************************** */
-
-static BOOL dump_core(void)
-{
- char *p;
- pstring dname;
- pstrcpy( dname, lp_logfile() );
- if ((p=strrchr_m(dname,'/')))
- *p=0;
- pstrcat( dname, "/corefiles" );
- mkdir( dname, 0700 );
- sys_chown( dname, getuid(), getgid() );
- chmod( dname, 0700 );
- if ( chdir(dname) )
- return( False );
- umask( ~(0700) );
-
-#ifdef HAVE_GETRLIMIT
-#ifdef RLIMIT_CORE
- {
- struct rlimit rlp;
- getrlimit( RLIMIT_CORE, &rlp );
- rlp.rlim_cur = MAX( 4*1024*1024, rlp.rlim_cur );
- setrlimit( RLIMIT_CORE, &rlp );
- getrlimit( RLIMIT_CORE, &rlp );
- DEBUG( 3, ( "Core limits now %d %d\n", (int)rlp.rlim_cur, (int)rlp.rlim_max ) );
- }
-#endif
-#endif
-
-
- DEBUG(0,("Dumping core in %s\n",dname));
- abort();
- return( True );
-}
-#endif
-
/**************************************************************************** **
Possibly continue after a fault.
**************************************************************************** */
static void fault_continue(void)
{
-#if DUMP_CORE
dump_core();
-#endif
}
/**************************************************************************** **
static time_t lastt;
int n;
struct subnet_record *subrec;
- extern BOOL rescan_listen_set;
- extern struct in_addr loopback_ip;
if (t && ((t - lastt) < NMBD_INTERFACES_RELOAD)) return False;
lastt = t;
for (n=iface_count() - 1; n >= 0; n--) {
struct interface *iface = get_interface(n);
+ if (!iface) {
+ DEBUG(2,("reload_interfaces: failed to get interface %d\n", n));
+ continue;
+ }
+
/*
* We don't want to add a loopback interface, in case
* someone has added 127.0.0.1 for smbd, nmbd needs to
DEBUG(2,("Found new interface %s\n",
inet_ntoa(iface->ip)));
subrec = make_normal_subnet(iface);
- if (subrec) register_my_workgroup_one_subnet(subrec);
+ if (subrec)
+ register_my_workgroup_one_subnet(subrec);
}
}
{
BOOL ret;
- set_remote_machine_name("nmbd");
+ set_remote_machine_name("nmbd", False);
if ( lp_loaded() ) {
pstring fname;
if ( test && !lp_file_list_changed() )
return(True);
- ret = lp_load( dyn_CONFIGFILE, True , False, False);
+ ret = lp_load( dyn_CONFIGFILE, True , False, False, True);
/* perhaps the config filename is now set */
if ( !test ) {
return(ret);
}
+/**************************************************************************** **
+ * React on 'smbcontrol nmbd reload-config' in the same way as to SIGHUP
+ * We use buf here to return BOOL result to process() when reload_interfaces()
+ * detects that there are no subnets.
+ **************************************************************************** */
+
+static void msg_reload_nmbd_services(struct messaging_context *msg,
+ void *private_data,
+ uint32_t msg_type,
+ struct server_id server_id,
+ DATA_BLOB *data)
+{
+ write_browse_list( 0, True );
+ dump_all_namelists();
+ reload_nmbd_services( True );
+ reopen_logs();
+
+ if (data->data) {
+ /* We were called from process() */
+ /* If reload_interfaces() returned True */
+ /* we need to shutdown if there are no subnets... */
+ /* pass this info back to process() */
+ *((BOOL*)data->data) = reload_interfaces(0);
+ }
+}
+
+static void msg_nmbd_send_packet(struct messaging_context *msg,
+ void *private_data,
+ uint32_t msg_type,
+ struct server_id src,
+ DATA_BLOB *data)
+{
+ struct packet_struct *p = (struct packet_struct *)data->data;
+ struct subnet_record *subrec;
+ struct in_addr *local_ip;
+
+ DEBUG(10, ("Received send_packet from %d\n", procid_to_pid(&src)));
+
+ if (data->length != sizeof(struct packet_struct)) {
+ DEBUG(2, ("Discarding invalid packet length from %d\n",
+ procid_to_pid(&src)));
+ return;
+ }
+
+ if ((p->packet_type != NMB_PACKET) &&
+ (p->packet_type != DGRAM_PACKET)) {
+ DEBUG(2, ("Discarding invalid packet type from %d: %d\n",
+ procid_to_pid(&src), p->packet_type));
+ return;
+ }
+
+ local_ip = iface_ip(p->ip);
+
+ if (local_ip == NULL) {
+ DEBUG(2, ("Could not find ip for packet from %d\n",
+ procid_to_pid(&src)));
+ return;
+ }
+
+ subrec = FIRST_SUBNET;
+
+ p->fd = (p->packet_type == NMB_PACKET) ?
+ subrec->nmb_sock : subrec->dgram_sock;
+
+ for (subrec = FIRST_SUBNET; subrec != NULL;
+ subrec = NEXT_SUBNET_EXCLUDING_UNICAST(subrec)) {
+ if (ip_equal(*local_ip, subrec->myip)) {
+ p->fd = (p->packet_type == NMB_PACKET) ?
+ subrec->nmb_sock : subrec->dgram_sock;
+ break;
+ }
+ }
+
+ if (p->packet_type == DGRAM_PACKET) {
+ p->port = 138;
+ p->packet.dgram.header.source_ip.s_addr = local_ip->s_addr;
+ p->packet.dgram.header.source_port = 138;
+ }
+
+ send_packet(p);
+}
+
/**************************************************************************** **
The main select loop.
**************************************************************************** */
static void process(void)
{
BOOL run_election;
+ BOOL no_subnets;
while( True ) {
time_t t = time(NULL);
/* Check for internal messages */
- message_dispatch();
+ message_dispatch(nmbd_messaging_context());
/*
* Check all broadcast subnets to see if
*/
if(reload_after_sighup) {
+ DATA_BLOB blob = data_blob_const(&no_subnets,
+ sizeof(no_subnets));
DEBUG( 0, ( "Got SIGHUP dumping debug info.\n" ) );
- write_browse_list( 0, True );
- dump_all_namelists();
- reload_nmbd_services( True );
- reopen_logs();
- if(reload_interfaces(0))
+ msg_reload_nmbd_services(nmbd_messaging_context(),
+ NULL, MSG_SMB_CONF_UPDATED,
+ procid_self(), &blob);
+
+ if(no_subnets)
return;
reload_after_sighup = 0;
}
return;
/* free up temp memory */
- lp_talloc_free();
+ lp_TALLOC_FREE();
}
}
Open the socket communication.
**************************************************************************** */
-static BOOL open_sockets(BOOL isdaemon, int port)
+static BOOL open_sockets(enum smb_server_mode server_mode, int port)
{
/*
* The sockets opened here will be used to receive broadcast
* now deprecated.
*/
- if ( isdaemon )
- ClientNMB = open_socket_in(SOCK_DGRAM, port,0,0,True);
- else
+ if ( server_mode == SERVER_MODE_INETD ) {
ClientNMB = 0;
+ } else {
+ ClientNMB = open_socket_in(SOCK_DGRAM, port,
+ 0, interpret_addr(lp_socket_address()),
+ True);
+ }
- ClientDGRAM = open_socket_in(SOCK_DGRAM,DGRAM_PORT,3,0,True);
+ ClientDGRAM = open_socket_in(SOCK_DGRAM, DGRAM_PORT,
+ 3, interpret_addr(lp_socket_address()),
+ True);
if ( ClientNMB == -1 )
return( False );
set_socket_options( ClientNMB, "SO_BROADCAST" );
set_socket_options( ClientDGRAM, "SO_BROADCAST" );
+ /* Ensure we're non-blocking. */
+ set_blocking( ClientNMB, False);
+ set_blocking( ClientDGRAM, False);
+
DEBUG( 3, ( "open_sockets: Broadcast sockets opened.\n" ) );
return( True );
}
**************************************************************************** */
int main(int argc, const char *argv[])
{
- static BOOL opt_interactive = False;
+ pstring logfile;
poptContext pc;
+ const char *p_lmhosts = dyn_LMHOSTSFILE;
+ BOOL no_process_group = False;
+ BOOL log_stdout = False;
+ enum smb_server_mode server_mode = SERVER_MODE_DAEMON;
+
struct poptOption long_options[] = {
POPT_AUTOHELP
- {"daemon", 'D', POPT_ARG_VAL, &is_daemon, True, "Become a daemon(default)" },
- {"interactive", 'i', POPT_ARG_VAL, &opt_interactive, True, "Run interactive (not a daemon)" },
- {"hosts", 'H', POPT_ARG_STRING, dyn_LMHOSTSFILE, 'H', "Load a netbios hosts file"},
+ {"daemon", 'D', POPT_ARG_VAL, &server_mode, SERVER_MODE_DAEMON,
+ "Become a daemon(default)" },
+ {"interactive", 'i', POPT_ARG_VAL, &server_mode,
+ SERVER_MODE_INTERACTIVE, "Run interactive (not a daemon)" },
+ {"foreground", 'F', POPT_ARG_VAL, &server_mode,
+ SERVER_MODE_FOREGROUND, "Run daemon in foreground (for daemontools & etc)" },
+ {"no-process-group", 0, POPT_ARG_VAL, &no_process_group, True, "Don't create a new process group" },
+ {"log-stdout", 'S', POPT_ARG_VAL, &log_stdout, True, "Log to stdout" },
+ {"hosts", 'H', POPT_ARG_STRING, &p_lmhosts, 'H', "Load a netbios hosts file"},
{"port", 'p', POPT_ARG_INT, &global_nmb_port, NMB_PORT, "Listen on the specified port" },
- {NULL, 0, POPT_ARG_INCLUDE_TABLE, popt_common_debug },
- {NULL, 0, POPT_ARG_INCLUDE_TABLE, popt_common_configfile },
- {NULL, 0, POPT_ARG_INCLUDE_TABLE, popt_common_socket_options },
- {NULL, 0, POPT_ARG_INCLUDE_TABLE, popt_common_version },
- {NULL, 0, POPT_ARG_INCLUDE_TABLE, popt_common_netbios_name },
- {NULL, 0, POPT_ARG_INCLUDE_TABLE, popt_common_log_base },
+ POPT_COMMON_SAMBA
{ NULL }
};
- int opt;
- pstring logfile;
-
- global_nmb_port = NMB_PORT;
- global_in_nmbd = True;
-
- StartupTime = time(NULL);
- sys_srandom(time(NULL) ^ sys_getpid());
+ load_case_tables();
- slprintf(logfile, sizeof(logfile)-1, "%s/log.nmbd", dyn_LOGFILEBASE);
- lp_set_logfile(logfile);
+ global_nmb_port = NMB_PORT;
- fault_setup((void (*)(void *))fault_continue );
-
- /* POSIX demands that signals are inherited. If the invoking process has
- * these signals masked, we will have problems, as we won't recieve them. */
- BlockSignals(False, SIGHUP);
- BlockSignals(False, SIGUSR1);
- BlockSignals(False, SIGTERM);
-
- CatchSignal( SIGHUP, SIGNAL_CAST sig_hup );
- CatchSignal( SIGTERM, SIGNAL_CAST sig_term );
+ pc = poptGetContext("nmbd", argc, argv, long_options, 0);
+ while (poptGetNextOpt(pc) != -1) {};
+ poptFreeContext(pc);
+ global_in_nmbd = True;
+
+ StartupTime = time(NULL);
+
+ sys_srandom(time(NULL) ^ sys_getpid());
+
+ if (!override_logfile) {
+ slprintf(logfile, sizeof(logfile)-1, "%s/log.nmbd", dyn_LOGFILEBASE);
+ lp_set_logfile(logfile);
+ }
+
+ fault_setup((void (*)(void *))fault_continue );
+ dump_core_setup("nmbd");
+
+ /* POSIX demands that signals are inherited. If the invoking process has
+ * these signals masked, we will have problems, as we won't receive them. */
+ BlockSignals(False, SIGHUP);
+ BlockSignals(False, SIGUSR1);
+ BlockSignals(False, SIGTERM);
+
+ CatchSignal( SIGHUP, SIGNAL_CAST sig_hup );
+ CatchSignal( SIGTERM, SIGNAL_CAST sig_term );
+
#if defined(SIGFPE)
- /* we are never interested in SIGFPE */
- BlockSignals(True,SIGFPE);
+ /* we are never interested in SIGFPE */
+ BlockSignals(True,SIGFPE);
#endif
- /* We no longer use USR2... */
+ /* We no longer use USR2... */
#if defined(SIGUSR2)
- BlockSignals(True, SIGUSR2);
+ BlockSignals(True, SIGUSR2);
#endif
- pc = poptGetContext("nmbd", argc, argv, long_options, 0);
-
- while((opt = poptGetNextOpt(pc)) != -1)
- { }
- poptFreeContext(pc);
-
- setup_logging( argv[0], opt_interactive );
+ if (server_mode == SERVER_MODE_INTERACTIVE) {
+ log_stdout = True;
+ }
- reopen_logs();
+ if (log_stdout && server_mode == SERVER_MODE_DAEMON) {
+ DEBUG(0,("ERROR: Can't log to stdout (-S) unless daemon is in foreground (-F) or interactive (-i)\n"));
+ exit(1);
+ }
- DEBUG( 0, ( "Netbios nameserver version %s started.\n", VERSION ) );
- DEBUGADD( 0, ( "Copyright Andrew Tridgell and the Samba Team 1994-2002\n" ) );
+ setup_logging( argv[0], log_stdout );
- if ( !reload_nmbd_services(False) )
- return(-1);
+ reopen_logs();
- if(!init_names())
- return -1;
+ DEBUG( 0, ( "Netbios nameserver version %s started.\n", SAMBA_VERSION_STRING) );
+ DEBUGADD( 0, ( "%s\n", COPYRIGHT_STARTUP_MESSAGE ) );
- reload_nmbd_services( True );
+ if ( !reload_nmbd_services(False) )
+ return(-1);
- if (strequal(lp_workgroup(),"*"))
- {
- DEBUG(0,("ERROR: a workgroup name of * is no longer supported\n"));
- exit(1);
- }
+ if(!init_names())
+ return -1;
- set_samba_nb_type();
+ reload_nmbd_services( True );
- if (!is_daemon && !is_a_socket(0))
- {
- DEBUG(0,("standard input is not a socket, assuming -D option\n"));
- is_daemon = True;
- }
-
- if (is_daemon && !opt_interactive)
- {
- DEBUG( 2, ( "Becoming a daemon.\n" ) );
- become_daemon();
- }
+ if (strequal(lp_workgroup(),"*")) {
+ DEBUG(0,("ERROR: a workgroup name of * is no longer supported\n"));
+ exit(1);
+ }
+
+ set_samba_nb_type();
+
+ if (is_a_socket(0)) {
+ if (server_mode == SERVER_MODE_DAEMON) {
+ DEBUG(0,("standard input is a socket, "
+ "assuming -F option\n"));
+ }
+ server_mode = SERVER_MODE_INETD;
+ }
+
+ if (server_mode == SERVER_MODE_DAEMON) {
+ DEBUG( 2, ( "Becoming a daemon.\n" ) );
+ become_daemon(True, no_process_group);
+ } else if (server_mode == SERVER_MODE_FOREGROUND) {
+ become_daemon(False, no_process_group);
+ }
#if HAVE_SETPGID
- /*
- * If we're interactive we want to set our own process group for
- * signal management.
- */
- if (opt_interactive)
- setpgid( (pid_t)0, (pid_t)0 );
+ /*
+ * If we're interactive we want to set our own process group for
+ * signal management.
+ */
+ if (server_mode == SERVER_MODE_INTERACTIVE && !no_process_group)
+ setpgid( (pid_t)0, (pid_t)0 );
#endif
+ if (nmbd_messaging_context() == NULL) {
+ return 1;
+ }
+
#ifndef SYNC_DNS
- /* Setup the async dns. We do it here so it doesn't have all the other
- stuff initialised and thus chewing memory and sockets */
- if(lp_we_are_a_wins_server() && lp_dns_proxy()) {
- start_async_dns();
- }
+ /* Setup the async dns. We do it here so it doesn't have all the other
+ stuff initialised and thus chewing memory and sockets */
+ if(lp_we_are_a_wins_server() && lp_dns_proxy()) {
+ start_async_dns();
+ }
#endif
- if (!directory_exist(lp_lockdir(), NULL)) {
- mkdir(lp_lockdir(), 0755);
- }
-
- pidfile_create("nmbd");
- message_init();
- message_register(MSG_FORCE_ELECTION, nmbd_message_election);
- message_register(MSG_WINS_NEW_ENTRY, nmbd_wins_new_entry);
- message_register(MSG_SHUTDOWN, nmbd_terminate);
- message_register(MSG_REQ_TALLOC_USAGE, return_all_talloc_info);
-
- DEBUG( 3, ( "Opening sockets %d\n", global_nmb_port ) );
-
- if ( !open_sockets( is_daemon, global_nmb_port ) ) {
- kill_async_dns_child();
- return 1;
- }
-
- /* Determine all the IP addresses we have. */
- load_interfaces();
-
- /* Create an nmbd subnet record for each of the above. */
- if( False == create_subnets() )
- {
- DEBUG(0,("ERROR: Failed when creating subnet lists. Exiting.\n"));
- kill_async_dns_child();
- exit(1);
- }
-
- /* Load in any static local names. */
- load_lmhosts_file(dyn_LMHOSTSFILE);
- DEBUG(3,("Loaded hosts file %s\n", dyn_LMHOSTSFILE));
-
- /* If we are acting as a WINS server, initialise data structures. */
- if( !initialise_wins() )
- {
- DEBUG( 0, ( "nmbd: Failed when initialising WINS server.\n" ) );
- kill_async_dns_child();
- exit(1);
- }
-
- /*
- * Register nmbd primary workgroup and nmbd names on all
- * the broadcast subnets, and on the WINS server (if specified).
- * Also initiate the startup of our primary workgroup (start
- * elections if we are setup as being able to be a local
- * master browser.
- */
-
- if( False == register_my_workgroup_and_names() )
- {
- DEBUG(0,("ERROR: Failed when creating my my workgroup. Exiting.\n"));
- kill_async_dns_child();
- exit(1);
- }
-
- /* We can only take signals in the select. */
- BlockSignals( True, SIGTERM );
-
- process();
-
- if (dbf)
- x_fclose(dbf);
- kill_async_dns_child();
- return(0);
+ if (!directory_exist(lp_lockdir(), NULL)) {
+ mkdir(lp_lockdir(), 0755);
+ }
+
+ pidfile_create("nmbd");
+ messaging_register(nmbd_messaging_context(), NULL,
+ MSG_FORCE_ELECTION, nmbd_message_election);
+#if 0
+ /* Until winsrepl is done. */
+ messaging_register(nmbd_messaging_context(), NULL,
+ MSG_WINS_NEW_ENTRY, nmbd_wins_new_entry);
+#endif
+ messaging_register(nmbd_messaging_context(), NULL,
+ MSG_SHUTDOWN, nmbd_terminate);
+ messaging_register(nmbd_messaging_context(), NULL,
+ MSG_SMB_CONF_UPDATED, msg_reload_nmbd_services);
+ messaging_register(nmbd_messaging_context(), NULL,
+ MSG_SEND_PACKET, msg_nmbd_send_packet);
+
+ TimeInit();
+
+ DEBUG( 3, ( "Opening sockets %d\n", global_nmb_port ) );
+
+ if ( !open_sockets( server_mode, global_nmb_port ) ) {
+ kill_async_dns_child();
+ return 1;
+ }
+
+ /* Determine all the IP addresses we have. */
+ load_interfaces();
+
+ /* Create an nmbd subnet record for each of the above. */
+ if( False == create_subnets() ) {
+ DEBUG(0,("ERROR: Failed when creating subnet lists. Exiting.\n"));
+ kill_async_dns_child();
+ exit(1);
+ }
+
+ /* Load in any static local names. */
+ load_lmhosts_file(p_lmhosts);
+ DEBUG(3,("Loaded hosts file %s\n", p_lmhosts));
+
+ /* If we are acting as a WINS server, initialise data structures. */
+ if( !initialise_wins() ) {
+ DEBUG( 0, ( "nmbd: Failed when initialising WINS server.\n" ) );
+ kill_async_dns_child();
+ exit(1);
+ }
+
+ /*
+ * Register nmbd primary workgroup and nmbd names on all
+ * the broadcast subnets, and on the WINS server (if specified).
+ * Also initiate the startup of our primary workgroup (start
+ * elections if we are setup as being able to be a local
+ * master browser.
+ */
+
+ if( False == register_my_workgroup_and_names() ) {
+ DEBUG(0,("ERROR: Failed when creating my my workgroup. Exiting.\n"));
+ kill_async_dns_child();
+ exit(1);
+ }
+
+ /* We can only take signals in the select. */
+ BlockSignals( True, SIGTERM );
+
+ process();
+
+ if (dbf)
+ x_fclose(dbf);
+ kill_async_dns_child();
+ return(0);
}
git.samba.org / tprouty / samba.git / blobdiff