mirror of
https://github.com/samba-team/samba.git
synced 2024-12-24 21:34:56 +03:00
d705b62141
yamd is much better, and doesn't require any source code changes
if you haven't seen yamd then take a look at
http://www3.hmc.edu/~neldredge/yamd/
its excellent!
(This used to be commit 25b13f8b79
)
753 lines
17 KiB
C
753 lines
17 KiB
C
/*
|
|
Unix SMB/Netbios implementation.
|
|
Version 1.9.
|
|
Main SMB server routines
|
|
Copyright (C) Andrew Tridgell 1992-1998
|
|
|
|
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"
|
|
#include "trans2.h"
|
|
|
|
pstring servicesf = CONFIGFILE;
|
|
extern pstring debugf;
|
|
extern fstring global_myworkgroup;
|
|
extern pstring global_myname;
|
|
|
|
int am_parent = 1;
|
|
|
|
/* the last message the was processed */
|
|
int last_message = -1;
|
|
|
|
/* a useful macro to debug the last message processed */
|
|
#define LAST_MESSAGE() smb_fn_name(last_message)
|
|
|
|
extern pstring scope;
|
|
extern int DEBUGLEVEL;
|
|
|
|
extern pstring user_socket_options;
|
|
|
|
#ifdef WITH_DFS
|
|
extern int dcelogin_atmost_once;
|
|
#endif /* WITH_DFS */
|
|
|
|
|
|
extern fstring remote_machine;
|
|
extern pstring OriginalDir;
|
|
|
|
/****************************************************************************
|
|
when exiting, take the whole family
|
|
****************************************************************************/
|
|
static void *dflt_sig(void)
|
|
{
|
|
exit_server("caught signal");
|
|
return NULL;
|
|
}
|
|
|
|
/****************************************************************************
|
|
Send a SIGTERM to our process group.
|
|
*****************************************************************************/
|
|
static void killkids(void)
|
|
{
|
|
if(am_parent) kill(0,SIGTERM);
|
|
}
|
|
|
|
|
|
/****************************************************************************
|
|
open the socket communication
|
|
****************************************************************************/
|
|
static BOOL open_sockets_inetd(void)
|
|
{
|
|
extern int Client;
|
|
|
|
/* Started from inetd. fd 0 is the socket. */
|
|
/* We will abort gracefully when the client or remote system
|
|
goes away */
|
|
Client = dup(0);
|
|
|
|
/* close our standard file descriptors */
|
|
close_low_fds();
|
|
|
|
set_socket_options(Client,"SO_KEEPALIVE");
|
|
set_socket_options(Client,user_socket_options);
|
|
|
|
return True;
|
|
}
|
|
|
|
|
|
/****************************************************************************
|
|
open the socket communication
|
|
****************************************************************************/
|
|
static BOOL open_sockets(BOOL is_daemon,int port)
|
|
{
|
|
extern int Client;
|
|
int num_interfaces = iface_count();
|
|
int fd_listenset[FD_SETSIZE];
|
|
fd_set listen_set;
|
|
int s;
|
|
int i;
|
|
|
|
if (!is_daemon) {
|
|
return open_sockets_inetd();
|
|
}
|
|
|
|
|
|
#ifdef HAVE_ATEXIT
|
|
{
|
|
static int atexit_set;
|
|
if(atexit_set == 0) {
|
|
atexit_set=1;
|
|
atexit(killkids);
|
|
}
|
|
}
|
|
#endif
|
|
|
|
/* Stop zombies */
|
|
CatchChild();
|
|
|
|
|
|
FD_ZERO(&listen_set);
|
|
|
|
if(lp_interfaces() && lp_bind_interfaces_only()) {
|
|
/* We have been given an interfaces line, and been
|
|
told to only bind to those interfaces. Create a
|
|
socket per interface and bind to only these.
|
|
*/
|
|
|
|
if(num_interfaces > FD_SETSIZE) {
|
|
DEBUG(0,("open_sockets: Too many interfaces specified to bind to. Number was %d \
|
|
max can be %d\n",
|
|
num_interfaces, FD_SETSIZE));
|
|
return False;
|
|
}
|
|
|
|
/* Now open a listen socket for each of the
|
|
interfaces. */
|
|
for(i = 0; i < num_interfaces; i++) {
|
|
struct in_addr *ifip = iface_n_ip(i);
|
|
|
|
if(ifip == NULL) {
|
|
DEBUG(0,("open_sockets: interface %d has NULL IP address !\n", i));
|
|
continue;
|
|
}
|
|
s = fd_listenset[i] = open_socket_in(SOCK_STREAM, port, 0, ifip->s_addr, True);
|
|
if(s == -1)
|
|
return False;
|
|
/* ready to listen */
|
|
if (listen(s, 5) == -1) {
|
|
DEBUG(0,("listen: %s\n",strerror(errno)));
|
|
close(s);
|
|
return False;
|
|
}
|
|
FD_SET(s,&listen_set);
|
|
}
|
|
} else {
|
|
/* Just bind to 0.0.0.0 - accept connections
|
|
from anywhere. */
|
|
num_interfaces = 1;
|
|
|
|
/* open an incoming socket */
|
|
s = open_socket_in(SOCK_STREAM, port, 0,
|
|
interpret_addr(lp_socket_address()),True);
|
|
if (s == -1)
|
|
return(False);
|
|
|
|
/* ready to listen */
|
|
if (listen(s, 5) == -1) {
|
|
DEBUG(0,("open_sockets: listen: %s\n",
|
|
strerror(errno)));
|
|
close(s);
|
|
return False;
|
|
}
|
|
|
|
fd_listenset[0] = s;
|
|
FD_SET(s,&listen_set);
|
|
}
|
|
|
|
/* now accept incoming connections - forking a new process
|
|
for each incoming connection */
|
|
DEBUG(2,("waiting for a connection\n"));
|
|
while (1) {
|
|
fd_set lfds;
|
|
int num;
|
|
|
|
memcpy((char *)&lfds, (char *)&listen_set,
|
|
sizeof(listen_set));
|
|
|
|
num = sys_select(FD_SETSIZE,&lfds,NULL);
|
|
|
|
if (num == -1 && errno == EINTR)
|
|
continue;
|
|
|
|
/* check if we need to reload services */
|
|
check_reload(time(NULL));
|
|
|
|
/* Find the sockets that are read-ready -
|
|
accept on these. */
|
|
for( ; num > 0; num--) {
|
|
struct sockaddr addr;
|
|
int in_addrlen = sizeof(addr);
|
|
|
|
s = -1;
|
|
for(i = 0; i < num_interfaces; i++) {
|
|
if(FD_ISSET(fd_listenset[i],&lfds)) {
|
|
s = fd_listenset[i];
|
|
/* Clear this so we don't look
|
|
at it again. */
|
|
FD_CLR(fd_listenset[i],&lfds);
|
|
break;
|
|
}
|
|
}
|
|
|
|
Client = accept(s,&addr,&in_addrlen);
|
|
|
|
if (Client == -1 && errno == EINTR)
|
|
continue;
|
|
|
|
if (Client == -1) {
|
|
DEBUG(0,("open_sockets: accept: %s\n",
|
|
strerror(errno)));
|
|
continue;
|
|
}
|
|
|
|
if (Client != -1 && fork()==0) {
|
|
/* Child code ... */
|
|
|
|
/* close the listening socket(s) */
|
|
for(i = 0; i < num_interfaces; i++)
|
|
close(fd_listenset[i]);
|
|
|
|
/* close our standard file
|
|
descriptors */
|
|
close_low_fds();
|
|
am_parent = 0;
|
|
|
|
set_socket_options(Client,"SO_KEEPALIVE");
|
|
set_socket_options(Client,user_socket_options);
|
|
|
|
/* Reset global variables in util.c so
|
|
that client substitutions will be
|
|
done correctly in the process. */
|
|
reset_globals_after_fork();
|
|
|
|
/*
|
|
* Ensure this child has kernel oplock
|
|
* capabilities, but not it's children.
|
|
*/
|
|
set_process_capability(KERNEL_OPLOCK_CAPABILITY, True);
|
|
set_inherited_process_capability(KERNEL_OPLOCK_CAPABILITY, False);
|
|
|
|
return True;
|
|
}
|
|
/* The parent doesn't need this socket */
|
|
close(Client);
|
|
|
|
/* Force parent to check log size after
|
|
* spawning child. Fix from
|
|
* klausr@ITAP.Physik.Uni-Stuttgart.De. The
|
|
* parent smbd will log to logserver.smb. It
|
|
* writes only two messages for each child
|
|
* started/finished. But each child writes,
|
|
* say, 50 messages also in logserver.smb,
|
|
* begining with the debug_count of the
|
|
* parent, before the child opens its own log
|
|
* file logserver.client. In a worst case
|
|
* scenario the size of logserver.smb would be
|
|
* checked after about 50*50=2500 messages
|
|
* (ca. 100kb).
|
|
* */
|
|
force_check_log_size();
|
|
|
|
} /* end for num */
|
|
} /* end while 1 */
|
|
|
|
/* NOTREACHED return True; */
|
|
}
|
|
|
|
/****************************************************************************
|
|
reload the services file
|
|
**************************************************************************/
|
|
BOOL reload_services(BOOL test)
|
|
{
|
|
BOOL ret;
|
|
|
|
if (lp_loaded()) {
|
|
pstring fname;
|
|
pstrcpy(fname,lp_configfile());
|
|
if (file_exist(fname,NULL) && !strcsequal(fname,servicesf)) {
|
|
pstrcpy(servicesf,fname);
|
|
test = False;
|
|
}
|
|
}
|
|
|
|
reopen_logs();
|
|
|
|
if (test && !lp_file_list_changed())
|
|
return(True);
|
|
|
|
lp_killunused(conn_snum_used);
|
|
|
|
ret = lp_load(servicesf,False,False,True);
|
|
|
|
load_printers();
|
|
|
|
/* perhaps the config filename is now set */
|
|
if (!test)
|
|
reload_services(True);
|
|
|
|
reopen_logs();
|
|
|
|
load_interfaces();
|
|
|
|
{
|
|
extern int Client;
|
|
if (Client != -1) {
|
|
set_socket_options(Client,"SO_KEEPALIVE");
|
|
set_socket_options(Client,user_socket_options);
|
|
}
|
|
}
|
|
|
|
reset_mangled_cache();
|
|
|
|
/* this forces service parameters to be flushed */
|
|
become_service(NULL,True);
|
|
|
|
return(ret);
|
|
}
|
|
|
|
|
|
|
|
/****************************************************************************
|
|
Catch a sighup.
|
|
****************************************************************************/
|
|
|
|
VOLATILE SIG_ATOMIC_T reload_after_sighup = False;
|
|
|
|
static void sig_hup(int sig)
|
|
{
|
|
BlockSignals(True,SIGHUP);
|
|
DEBUG(0,("Got SIGHUP\n"));
|
|
|
|
/*
|
|
* Fix from <branko.cibej@hermes.si> here.
|
|
* We used to reload in the signal handler - this
|
|
* is a *BIG* no-no.
|
|
*/
|
|
|
|
reload_after_sighup = True;
|
|
BlockSignals(False,SIGHUP);
|
|
}
|
|
|
|
|
|
|
|
#if DUMP_CORE
|
|
/*******************************************************************
|
|
prepare to dump a core file - carefully!
|
|
********************************************************************/
|
|
static BOOL dump_core(void)
|
|
{
|
|
char *p;
|
|
pstring dname;
|
|
pstrcpy(dname,debugf);
|
|
if ((p=strrchr(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
|
|
|
|
|
|
/****************************************************************************
|
|
exit the server
|
|
****************************************************************************/
|
|
void exit_server(char *reason)
|
|
{
|
|
static int firsttime=1;
|
|
extern char *last_inbuf;
|
|
|
|
|
|
if (!firsttime) exit(0);
|
|
firsttime = 0;
|
|
|
|
unbecome_user();
|
|
DEBUG(2,("Closing connections\n"));
|
|
|
|
conn_close_all();
|
|
|
|
respond_to_all_remaining_local_messages();
|
|
|
|
#ifdef WITH_DFS
|
|
if (dcelogin_atmost_once) {
|
|
dfs_unlogin();
|
|
}
|
|
#endif
|
|
|
|
if (!reason) {
|
|
int oldlevel = DEBUGLEVEL;
|
|
DEBUGLEVEL = 10;
|
|
DEBUG(0,("Last message was %s\n",smb_fn_name(last_message)));
|
|
if (last_inbuf)
|
|
show_msg(last_inbuf);
|
|
DEBUGLEVEL = oldlevel;
|
|
DEBUG(0,("===============================================================\n"));
|
|
#if DUMP_CORE
|
|
if (dump_core()) return;
|
|
#endif
|
|
}
|
|
|
|
locking_end();
|
|
|
|
DEBUG(3,("Server exit (%s)\n", (reason ? reason : "")));
|
|
exit(0);
|
|
}
|
|
|
|
|
|
|
|
/****************************************************************************
|
|
initialise connect, service and file structs
|
|
****************************************************************************/
|
|
static void init_structs(void )
|
|
{
|
|
/*
|
|
* Set the machine NETBIOS name if not already
|
|
* set from the config file.
|
|
*/
|
|
|
|
if (!*global_myname) {
|
|
char *p;
|
|
fstrcpy( global_myname, myhostname() );
|
|
p = strchr( global_myname, '.' );
|
|
if (p)
|
|
*p = 0;
|
|
}
|
|
|
|
strupper( global_myname );
|
|
|
|
conn_init();
|
|
|
|
file_init();
|
|
|
|
/* for RPC pipes */
|
|
init_rpc_pipe_hnd();
|
|
|
|
/* for LSA handles */
|
|
init_lsa_policy_hnd();
|
|
|
|
init_dptrs();
|
|
}
|
|
|
|
/****************************************************************************
|
|
usage on the program
|
|
****************************************************************************/
|
|
static void usage(char *pname)
|
|
{
|
|
|
|
printf("Usage: %s [-DaoPh?V] [-d debuglevel] [-l log basename] [-p port]\n", pname);
|
|
printf(" [-O socket options] [-s services file] [-i scope]\n");
|
|
printf("\t-D Become a daemon\n");
|
|
printf("\t-a Append to log file (default)\n");
|
|
printf("\t-o Overwrite log file, don't append\n");
|
|
printf("\t-P Passive only\n");
|
|
printf("\t-h Print usage\n");
|
|
printf("\t-? Print usage\n");
|
|
printf("\t-V Print version\n");
|
|
printf("\t-d debuglevel Set the debuglevel\n");
|
|
printf("\t-l log basename. Basename for log/debug files\n");
|
|
printf("\t-p port Listen on the specified port\n");
|
|
printf("\t-O socket options Socket options\n");
|
|
printf("\t-s services file. Filename of services file\n");
|
|
printf("\t-i scope NetBIOS scope to use (default none)\n");
|
|
printf("\n");
|
|
}
|
|
|
|
|
|
/****************************************************************************
|
|
main program
|
|
****************************************************************************/
|
|
int main(int argc,char *argv[])
|
|
{
|
|
extern BOOL append_log;
|
|
/* shall I run as a daemon */
|
|
BOOL is_daemon = False;
|
|
int port = SMB_PORT;
|
|
int opt;
|
|
extern char *optarg;
|
|
|
|
#ifdef HAVE_SET_AUTH_PARAMETERS
|
|
set_auth_parameters(argc,argv);
|
|
#endif
|
|
|
|
/* this is for people who can't start the program correctly */
|
|
while (argc > 1 && (*argv[1] != '-')) {
|
|
argv++;
|
|
argc--;
|
|
}
|
|
|
|
while ( EOF != (opt = getopt(argc, argv, "O:i:l:s:d:Dp:h?VPaof:")) )
|
|
switch (opt) {
|
|
case 'O':
|
|
pstrcpy(user_socket_options,optarg);
|
|
break;
|
|
|
|
case 'i':
|
|
pstrcpy(scope,optarg);
|
|
break;
|
|
|
|
case 'P':
|
|
{
|
|
extern BOOL passive;
|
|
passive = True;
|
|
}
|
|
break;
|
|
|
|
case 's':
|
|
pstrcpy(servicesf,optarg);
|
|
break;
|
|
|
|
case 'l':
|
|
pstrcpy(debugf,optarg);
|
|
break;
|
|
|
|
case 'a':
|
|
append_log = True;
|
|
break;
|
|
|
|
case 'o':
|
|
append_log = False;
|
|
break;
|
|
|
|
case 'D':
|
|
is_daemon = True;
|
|
break;
|
|
|
|
case 'd':
|
|
if (*optarg == 'A')
|
|
DEBUGLEVEL = 10000;
|
|
else
|
|
DEBUGLEVEL = atoi(optarg);
|
|
break;
|
|
|
|
case 'p':
|
|
port = atoi(optarg);
|
|
break;
|
|
|
|
case 'h':
|
|
case '?':
|
|
usage(argv[0]);
|
|
exit(0);
|
|
break;
|
|
|
|
case 'V':
|
|
printf("Version %s\n",VERSION);
|
|
exit(0);
|
|
break;
|
|
default:
|
|
DEBUG(0,("Incorrect program usage - are you sure the command line is correct?\n"));
|
|
usage(argv[0]);
|
|
exit(1);
|
|
}
|
|
|
|
#ifdef HAVE_SETLUID
|
|
/* needed for SecureWare on SCO */
|
|
setluid(0);
|
|
#endif
|
|
|
|
/*
|
|
* gain_root_privilege uses an assert than will cause a core
|
|
* dump if euid != 0. Ensure this is the case.
|
|
*/
|
|
|
|
if(geteuid() != (uid_t)0) {
|
|
fprintf(stderr, "%s: Version %s : Must have effective user id of zero to run.\n", argv[0], VERSION);
|
|
exit(1);
|
|
}
|
|
|
|
append_log = True;
|
|
|
|
TimeInit();
|
|
|
|
pstrcpy(debugf,SMBLOGFILE);
|
|
|
|
pstrcpy(remote_machine, "smb");
|
|
|
|
setup_logging(argv[0],False);
|
|
|
|
charset_initialise();
|
|
|
|
/* we want to re-seed early to prevent time delays causing
|
|
client problems at a later date. (tridge) */
|
|
generate_random_buffer(NULL, 0, False);
|
|
|
|
/* make absolutely sure we run as root - to handle cases where people
|
|
are crazy enough to have it setuid */
|
|
|
|
gain_root_privilege();
|
|
gain_root_group_privilege();
|
|
|
|
fault_setup((void (*)(void *))exit_server);
|
|
CatchSignal(SIGTERM , SIGNAL_CAST dflt_sig);
|
|
|
|
/* we are never interested in SIGPIPE */
|
|
BlockSignals(True,SIGPIPE);
|
|
|
|
#if defined(SIGFPE)
|
|
/* we are never interested in SIGFPE */
|
|
BlockSignals(True,SIGFPE);
|
|
#endif
|
|
|
|
/* we want total control over the permissions on created files,
|
|
so set our umask to 0 */
|
|
umask(0);
|
|
|
|
dos_GetWd(OriginalDir);
|
|
|
|
init_uid();
|
|
|
|
reopen_logs();
|
|
|
|
DEBUG(1,( "smbd version %s started.\n", VERSION));
|
|
DEBUGADD(1,( "Copyright Andrew Tridgell 1992-1998\n"));
|
|
|
|
DEBUG(2,("uid=%d gid=%d euid=%d egid=%d\n",
|
|
(int)getuid(),(int)getgid(),(int)geteuid(),(int)getegid()));
|
|
|
|
if (sizeof(uint16) < 2 || sizeof(uint32) < 4) {
|
|
DEBUG(0,("ERROR: Samba is not configured correctly for the word size on your machine\n"));
|
|
exit(1);
|
|
}
|
|
|
|
/*
|
|
* Do this before reload_services.
|
|
*/
|
|
|
|
if (!reload_services(False))
|
|
return(-1);
|
|
|
|
init_structs();
|
|
|
|
#ifdef WITH_PROFILE
|
|
if (!profile_setup(False)) {
|
|
DEBUG(0,("ERROR: failed to setup profiling\n"));
|
|
return -1;
|
|
}
|
|
#endif
|
|
|
|
#ifdef WITH_SSL
|
|
{
|
|
extern BOOL sslEnabled;
|
|
sslEnabled = lp_ssl_enabled();
|
|
if(sslEnabled)
|
|
sslutil_init(True);
|
|
}
|
|
#endif /* WITH_SSL */
|
|
|
|
codepage_initialise(lp_client_code_page());
|
|
|
|
fstrcpy(global_myworkgroup, lp_workgroup());
|
|
|
|
if(!pdb_generate_sam_sid()) {
|
|
DEBUG(0,("ERROR: Samba cannot create a SAM SID.\n"));
|
|
exit(1);
|
|
}
|
|
|
|
CatchSignal(SIGHUP,SIGNAL_CAST sig_hup);
|
|
|
|
/* Setup the signals that allow the debug log level
|
|
to by dynamically changed. */
|
|
|
|
/* If we are using the malloc debug code we can't use
|
|
SIGUSR1 and SIGUSR2 to do debug level changes. */
|
|
|
|
#if defined(SIGUSR1)
|
|
CatchSignal( SIGUSR1, SIGNAL_CAST sig_usr1 );
|
|
#endif /* SIGUSR1 */
|
|
|
|
#if defined(SIGUSR2)
|
|
CatchSignal( SIGUSR2, SIGNAL_CAST sig_usr2 );
|
|
#endif /* SIGUSR2 */
|
|
|
|
DEBUG(3,( "loaded services\n"));
|
|
|
|
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) {
|
|
DEBUG( 3, ( "Becoming a daemon.\n" ) );
|
|
become_daemon();
|
|
}
|
|
|
|
check_kernel_oplocks();
|
|
|
|
if (!directory_exist(lp_lockdir(), NULL)) {
|
|
mkdir(lp_lockdir(), 0755);
|
|
}
|
|
|
|
if (is_daemon) {
|
|
pidfile_create("smbd");
|
|
}
|
|
|
|
if (!locking_init(0))
|
|
exit(1);
|
|
|
|
if (!open_sockets(is_daemon,port))
|
|
exit(1);
|
|
|
|
if(!initialize_password_db())
|
|
exit(1);
|
|
|
|
/* possibly reload the services file. */
|
|
reload_services(True);
|
|
|
|
if (*lp_rootdir()) {
|
|
if (sys_chroot(lp_rootdir()) == 0)
|
|
DEBUG(2,("Changed root to %s\n", lp_rootdir()));
|
|
}
|
|
|
|
/* Setup the oplock IPC socket. */
|
|
if( !open_oplock_ipc() )
|
|
exit(1);
|
|
|
|
smbd_process();
|
|
close_sockets();
|
|
|
|
exit_server("normal exit");
|
|
return(0);
|
|
}
|