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/*
Unix SMB/CIFS implementation.
Main SMB server routines
Copyright (C) Andrew Tridgell 1992-1998
Copyright (C) Martin Pool 2002
Copyright (C) Jelmer Vernooij 2002-2003
Copyright (C) Volker Lendecke 1993-2007
Copyright (C) Jeremy Allison 1993-2007
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 3 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, see <http://www.gnu.org/licenses/>.
*/
#include "includes.h"
#include "smbd/smbd.h"
#include "smbd/globals.h"
#include "nt_printing.h"
#include "printing/pcap.h"
#include "printing/printer_list.h"
#include "printing/load.h"
#include "auth.h"
#include "messages.h"
#include "lib/param/loadparm.h"
/*
* The persistent pcap cache is populated by the background print process. Per
* client smbds should only reload their printer share inventories if this
* information has changed. Use reload_last_pcap_time to detect this.
*/
static time_t reload_last_pcap_time = 0;
bool snum_is_shared_printer(int snum)
{
return (lp_browseable(snum) && lp_snum_ok(snum) && lp_printable(snum));
}
/**
* @brief Purge stale printer shares and reload from pre-populated pcap cache.
*
* This function should normally only be called as a callback on a successful
* pcap_cache_reload(), or on client enumeration.
*/
void delete_and_reload_printers(void)
{
int n_services;
int pnum;
int snum;
const char *pname;
bool ok;
time_t pcap_last_update;
TALLOC_CTX *frame = NULL;
const struct loadparm_substitution *lp_sub =
loadparm_s3_global_substitution();
if (!lp_load_printers()) {
DBG_DEBUG("skipping printer reload: disabled\n");
return;
}
frame = talloc_stackframe();
ok = pcap_cache_loaded(&pcap_last_update);
if (!ok) {
DEBUG(1, ("pcap cache not loaded\n"));
talloc_free(frame);
return;
}
if (reload_last_pcap_time == pcap_last_update) {
DEBUG(5, ("skipping printer reload, already up to date.\n"));
talloc_free(frame);
return;
}
reload_last_pcap_time = pcap_last_update;
/* Get pcap printers updated */
load_printers();
n_services = lp_numservices();
pnum = lp_servicenumber(PRINTERS_NAME);
DEBUG(10, ("reloading printer services from pcap cache\n"));
/*
* Add default config for printers added to smb.conf file and remove
* stale printers
*/
for (snum = 0; snum < n_services; snum++) {
/* avoid removing PRINTERS_NAME */
if (snum == pnum) {
continue;
}
/* skip no-printer services */
if (!snum_is_shared_printer(snum)) {
continue;
}
pname = lp_printername(frame, lp_sub, snum);
/* check printer, but avoid removing non-autoloaded printers */
if (lp_autoloaded(snum) &&
!printer_list_printername_exists(pname)) {
lp_killservice(snum);
}
}
/* Make sure deleted printers are gone */
load_printers();
talloc_free(frame);
}
/****************************************************************************
Reload the services file.
**************************************************************************/
bool reload_services(struct smbd_server_connection *sconn,
bool (*snumused) (struct smbd_server_connection *, int),
bool test)
{
const struct loadparm_substitution *lp_sub =
loadparm_s3_global_substitution();
struct smbXsrv_connection *xconn = NULL;
bool ret;
if (lp_loaded()) {
char *fname = lp_next_configfile(talloc_tos(), lp_sub);
if (file_exist(fname) &&
!strcsequal(fname, get_dyn_CONFIGFILE())) {
set_dyn_CONFIGFILE(fname);
test = False;
}
TALLOC_FREE(fname);
}
reopen_logs();
if (test && !lp_file_list_changed())
return(True);
lp_killunused(sconn, snumused);
ret = lp_load_with_shares(get_dyn_CONFIGFILE());
/* perhaps the config filename is now set */
if (!test) {
reload_services(sconn, snumused, true);
}
reopen_logs();
load_interfaces();
if (sconn != NULL && sconn->client != NULL) {
xconn = sconn->client->connections;
}
for (;xconn != NULL; xconn = xconn->next) {
set_socket_options(xconn->transport.sock, "SO_KEEPALIVE");
set_socket_options(xconn->transport.sock, lp_socket_options());
}
mangle_reset_cache();
flush_dfree_cache();
return(ret);
}
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