diff options
Diffstat (limited to 'source4/nmbd/nmbd.c')
| -rw-r--r-- | source4/nmbd/nmbd.c | 778 |
1 files changed, 0 insertions, 778 deletions
diff --git a/source4/nmbd/nmbd.c b/source4/nmbd/nmbd.c deleted file mode 100644 index 0fa3525666..0000000000 --- a/source4/nmbd/nmbd.c +++ /dev/null @@ -1,778 +0,0 @@ -/* - Unix SMB/CIFS implementation. - 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) - - 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 - (at your option) any later version. - - This program is distributed in the hope that it will be useful, - but WITHOUT ANY WARRANTY; without even the implied warranty of - MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - GNU General Public License for more details. - - You should have received a copy of the GNU General Public License - along with this program; if not, write to the Free Software - Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. - -*/ - -#include "includes.h" - -int ClientNMB = -1; -int ClientDGRAM = -1; -int global_nmb_port = -1; - -extern BOOL global_in_nmbd; - -/* are we running as a daemon ? */ -static BOOL is_daemon = False; - -/* fork or run in foreground ? */ -static BOOL Fork = True; - -/* log to standard output ? */ -static BOOL log_stdout = False; - -/* have we found LanMan clients yet? */ -BOOL found_lm_clients = False; - -/* what server type are we currently */ - -time_t StartupTime = 0; - -/**************************************************************************** ** - Handle a SIGTERM in band. - **************************************************************************** */ - -static void terminate(void) -{ - DEBUG(0,("Got SIGTERM: going down...\n")); - - /* Write out wins.dat file if samba is a WINS server */ - wins_write_database(False); - - /* Remove all SELF registered names from WINS */ - release_wins_names(); - - /* Announce all server entries as 0 time-to-live, 0 type. */ - announce_my_servers_removed(); - - /* If there was an async dns child - kill it. */ - kill_async_dns_child(); - - exit(0); -} - -/**************************************************************************** ** - Handle a SHUTDOWN message from smbcontrol. - **************************************************************************** */ - -static void nmbd_terminate(int msg_type, pid_t src, void *buf, size_t len) -{ - terminate(); -} - -/**************************************************************************** ** - Catch a SIGTERM signal. - **************************************************************************** */ - -static sig_atomic_t got_sig_term; - -static void sig_term(int sig) -{ - got_sig_term = 1; - sys_select_signal(); -} - -/**************************************************************************** ** - Catch a SIGHUP signal. - **************************************************************************** */ - -static sig_atomic_t reload_after_sighup; - -static void sig_hup(int sig) -{ - reload_after_sighup = 1; - sys_select_signal(); -} - -/******************************************************************* - 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 -} - -/**************************************************************************** ** - Expire old names from the namelist and server list. - **************************************************************************** */ - -static void expire_names_and_servers(time_t t) -{ - static time_t lastrun = 0; - - if ( !lastrun ) - lastrun = t; - if ( t < (lastrun + 5) ) - return; - lastrun = t; - - /* - * Expire any timed out names on all the broadcast - * subnets and those registered with the WINS server. - * (nmbd_namelistdb.c) - */ - - expire_names(t); - - /* - * Go through all the broadcast subnets and for each - * workgroup known on that subnet remove any expired - * server names. If a workgroup has an empty serverlist - * and has itself timed out then remove the workgroup. - * (nmbd_workgroupdb.c) - */ - - expire_workgroups_and_servers(t); -} - -/************************************************************************** ** - Reload the list of network interfaces. - ************************************************************************** */ - -static BOOL reload_interfaces(time_t t) -{ - 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; - - if (!interfaces_changed()) return False; - - /* the list of probed interfaces has changed, we may need to add/remove - some subnets */ - load_interfaces(); - - /* find any interfaces that need adding */ - for (n=iface_count() - 1; n >= 0; n--) { - struct interface *iface = get_interface(n); - - /* - * We don't want to add a loopback interface, in case - * someone has added 127.0.0.1 for smbd, nmbd needs to - * ignore it here. JRA. - */ - - if (ip_equal(iface->ip, loopback_ip)) { - DEBUG(2,("reload_interfaces: Ignoring loopback interface %s\n", inet_ntoa(iface->ip))); - continue; - } - - for (subrec=subnetlist; subrec; subrec=subrec->next) { - if (ip_equal(iface->ip, subrec->myip) && - ip_equal(iface->nmask, subrec->mask_ip)) break; - } - - if (!subrec) { - /* it wasn't found! add it */ - DEBUG(2,("Found new interface %s\n", - inet_ntoa(iface->ip))); - subrec = make_normal_subnet(iface); - if (subrec) register_my_workgroup_one_subnet(subrec); - } - } - - /* find any interfaces that need deleting */ - for (subrec=subnetlist; subrec; subrec=subrec->next) { - for (n=iface_count() - 1; n >= 0; n--) { - struct interface *iface = get_interface(n); - if (ip_equal(iface->ip, subrec->myip) && - ip_equal(iface->nmask, subrec->mask_ip)) break; - } - if (n == -1) { - /* oops, an interface has disapeared. This is - tricky, we don't dare actually free the - interface as it could be being used, so - instead we just wear the memory leak and - remove it from the list of interfaces without - freeing it */ - DEBUG(2,("Deleting dead interface %s\n", - inet_ntoa(subrec->myip))); - close_subnet(subrec); - } - } - - rescan_listen_set = True; - - /* We need to shutdown if there are no subnets... */ - if (FIRST_SUBNET == NULL) { - DEBUG(0,("reload_interfaces: No subnets to listen to. Shutting down...\n")); - return True; - } - return False; -} - -/**************************************************************************** ** - Reload the services file. - **************************************************************************** */ - -static BOOL reload_nmbd_services(BOOL test) -{ - BOOL ret; - - set_remote_machine_name("nmbd"); - - if ( lp_loaded() ) { - pstring fname; - pstrcpy( fname,lp_configfile()); - if (file_exist(fname,NULL) && !strcsequal(fname,dyn_CONFIGFILE)) { - pstrcpy(dyn_CONFIGFILE,fname); - test = False; - } - } - - if ( test && !lp_file_list_changed() ) - return(True); - - ret = lp_load( dyn_CONFIGFILE, True , False, False); - - /* perhaps the config filename is now set */ - if ( !test ) { - DEBUG( 3, ( "services not loaded\n" ) ); - reload_nmbd_services( True ); - } - - return(ret); -} - -/**************************************************************************** ** - The main select loop. - **************************************************************************** */ - -static void process(void) -{ - BOOL run_election; - - while( True ) { - time_t t = time(NULL); - - /* Check for internal messages */ - - message_dispatch(); - - /* - * Check all broadcast subnets to see if - * we need to run an election on any of them. - * (nmbd_elections.c) - */ - - run_election = check_elections(); - - /* - * Read incoming UDP packets. - * (nmbd_packets.c) - */ - - if(listen_for_packets(run_election)) - return; - - /* - * Handle termination inband. - */ - - if (got_sig_term) { - got_sig_term = 0; - terminate(); - } - - /* - * Process all incoming packets - * read above. This calls the success and - * failure functions registered when response - * packets arrrive, and also deals with request - * packets from other sources. - * (nmbd_packets.c) - */ - - run_packet_queue(); - - /* - * Run any elections - initiate becoming - * a local master browser if we have won. - * (nmbd_elections.c) - */ - - run_elections(t); - - /* - * Send out any broadcast announcements - * of our server names. This also announces - * the workgroup name if we are a local - * master browser. - * (nmbd_sendannounce.c) - */ - - announce_my_server_names(t); - - /* - * Send out any LanMan broadcast announcements - * of our server names. - * (nmbd_sendannounce.c) - */ - - announce_my_lm_server_names(t); - - /* - * If we are a local master browser, periodically - * announce ourselves to the domain master browser. - * This also deals with syncronising the domain master - * browser server lists with ourselves as a local - * master browser. - * (nmbd_sendannounce.c) - */ - - announce_myself_to_domain_master_browser(t); - - /* - * Fullfill any remote announce requests. - * (nmbd_sendannounce.c) - */ - - announce_remote(t); - - /* - * Fullfill any remote browse sync announce requests. - * (nmbd_sendannounce.c) - */ - - browse_sync_remote(t); - - /* - * Scan the broadcast subnets, and WINS client - * namelists and refresh any that need refreshing. - * (nmbd_mynames.c) - */ - - refresh_my_names(t); - - /* - * Scan the subnet namelists and server lists and - * expire thos that have timed out. - * (nmbd.c) - */ - - expire_names_and_servers(t); - - /* - * Write out a snapshot of our current browse list into - * the browse.dat file. This is used by smbd to service - * incoming NetServerEnum calls - used to synchronise - * browse lists over subnets. - * (nmbd_serverlistdb.c) - */ - - write_browse_list(t, False); - - /* - * If we are a domain master browser, we have a list of - * local master browsers we should synchronise browse - * lists with (these are added by an incoming local - * master browser announcement packet). Expire any of - * these that are no longer current, and pull the server - * lists from each of these known local master browsers. - * (nmbd_browsesync.c) - */ - - dmb_expire_and_sync_browser_lists(t); - - /* - * Check that there is a local master browser for our - * workgroup for all our broadcast subnets. If one - * is not found, start an election (which we ourselves - * may or may not participate in, depending on the - * setting of the 'local master' parameter. - * (nmbd_elections.c) - */ - - check_master_browser_exists(t); - - /* - * If we are configured as a logon server, attempt to - * register the special NetBIOS names to become such - * (WORKGROUP<1c> name) on all broadcast subnets and - * with the WINS server (if used). If we are configured - * to become a domain master browser, attempt to register - * the special NetBIOS name (WORKGROUP<1b> name) to - * become such. - * (nmbd_become_dmb.c) - */ - - add_domain_names(t); - - /* - * If we are a WINS server, do any timer dependent - * processing required. - * (nmbd_winsserver.c) - */ - - initiate_wins_processing(t); - - /* - * If we are a domain master browser, attempt to contact the - * WINS server to get a list of all known WORKGROUPS/DOMAINS. - * This will only work to a Samba WINS server. - * (nmbd_browsesync.c) - */ - - if (lp_enhanced_browsing()) - collect_all_workgroup_names_from_wins_server(t); - - /* - * Go through the response record queue and time out or re-transmit - * and expired entries. - * (nmbd_packets.c) - */ - - retransmit_or_expire_response_records(t); - - /* - * check to see if any remote browse sync child processes have completed - */ - - sync_check_completion(); - - /* - * regularly sync with any other DMBs we know about - */ - - if (lp_enhanced_browsing()) - sync_all_dmbs(t); - - /* - * clear the unexpected packet queue - */ - - clear_unexpected(t); - - /* - * Reload the services file if we got a sighup. - */ - - if(reload_after_sighup) { - 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)) - return; - reload_after_sighup = 0; - } - - /* check for new network interfaces */ - - if(reload_interfaces(t)) - return; - - /* free up temp memory */ - lp_talloc_free(); - } -} - -/**************************************************************************** ** - Open the socket communication. - **************************************************************************** */ - -static BOOL open_sockets(BOOL isdaemon, int port) -{ - /* - * The sockets opened here will be used to receive broadcast - * packets *only*. Interface specific sockets are opened in - * make_subnet() in namedbsubnet.c. Thus we bind to the - * address "0.0.0.0". The parameter 'socket address' is - * now deprecated. - */ - - if ( isdaemon ) - ClientNMB = open_socket_in(SOCK_DGRAM, port,0,0,True); - else - ClientNMB = 0; - - ClientDGRAM = open_socket_in(SOCK_DGRAM,DGRAM_PORT,3,0,True); - - if ( ClientNMB == -1 ) - return( False ); - - /* we are never interested in SIGPIPE */ - BlockSignals(True,SIGPIPE); - - set_socket_options( ClientNMB, "SO_BROADCAST" ); - set_socket_options( ClientDGRAM, "SO_BROADCAST" ); - - DEBUG( 3, ( "open_sockets: Broadcast sockets opened.\n" ) ); - return( True ); -} - -/**************************************************************************** ** - main program - **************************************************************************** */ - int main(int argc, const char *argv[]) -{ - static BOOL opt_interactive = False; - poptContext pc; - 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)" }, - {"foreground", 'F', POPT_ARG_VAL, &Fork, False, "Run daemon in foreground (for daemontools & etc)" }, - {"log-stdout", 'S', POPT_ARG_VAL, &log_stdout, True, "Log to stdout" }, - {"hosts", 'H', POPT_ARG_STRING, dyn_LMHOSTSFILE, '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 }, - { NULL } - }; - int opt; - pstring logfile; - - global_nmb_port = NMB_PORT; - global_in_nmbd = True; - - StartupTime = time(NULL); - - sys_srandom(time(NULL) ^ sys_getpid()); - - slprintf(logfile, sizeof(logfile)-1, "%s/log.nmbd", dyn_LOGFILEBASE); - lp_set_logfile(logfile); - - 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 ); - -#if defined(SIGFPE) - /* we are never interested in SIGFPE */ - BlockSignals(True,SIGFPE); -#endif - - /* We no longer use USR2... */ -#if defined(SIGUSR2) - BlockSignals(True, SIGUSR2); -#endif - pc = poptGetContext("nmbd", argc, argv, long_options, 0); - - while((opt = poptGetNextOpt(pc)) != -1) - { } - - poptFreeContext(pc); - - if ( opt_interactive ) { - Fork = False; - log_stdout = True; - } - - if ( log_stdout && Fork ) { - DEBUG(0,("ERROR: Can't log to stdout (-S) unless daemon is in foreground (-F) or interactive (-i)\n")); - exit(1); - } - - setup_logging( argv[0], log_stdout?DEBUG_STDOUT : DEBUG_FILE ); - - reopen_logs(); - - DEBUG( 0, ( "Netbios nameserver version %s started.\n", VERSION ) ); - DEBUGADD( 0, ( "Copyright Andrew Tridgell and the Samba Team 1994-2002\n" ) ); - - if ( !reload_nmbd_services(False) ) - return(-1); - - if(!init_names()) - return -1; - - reload_nmbd_services( True ); - - if (strequal(lp_workgroup(),"*")) - { - DEBUG(0,("ERROR: a workgroup name of * is no longer supported\n")); - exit(1); - } - - set_samba_nb_type(); - - 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(Fork); - } - -#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 ); -#endif - -#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(); - } -#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); -} |