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/*
Unix SMB/CIFS implementation.
NBT datagram netlogon server
Copyright (C) Andrew Tridgell 2005
Copyright (C) Andrew Bartlett <abartlet@samba.org> 2008
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 "nbt_server/nbt_server.h"
#include "lib/socket/socket.h"
#include "lib/ldb/include/ldb.h"
#include "dsdb/samdb/samdb.h"
#include "auth/auth.h"
#include "util/util_ldb.h"
#include "param/param.h"
#include "smbd/service_task.h"
#include "cldap_server/cldap_server.h"
#include "libcli/security/security.h"
/*
reply to a GETDC request
*/
static void nbtd_netlogon_getdc(struct dgram_mailslot_handler *dgmslot,
struct nbtd_interface *iface,
struct nbt_dgram_packet *packet,
const char *mailslot_name,
const struct socket_address *src,
struct nbt_netlogon_packet *netlogon)
{
struct nbt_name *name = &packet->data.msg.dest_name;
struct nbtd_interface *reply_iface = nbtd_find_reply_iface(iface, src->addr, false);
struct nbt_netlogon_response_from_pdc *pdc;
const char *ref_attrs[] = {"nETBIOSName", NULL};
struct ldb_message **ref_res;
struct ldb_context *samctx;
struct ldb_dn *partitions_basedn;
struct nbt_netlogon_response netlogon_response;
int ret;
/* only answer getdc requests on the PDC or LOGON names */
if (name->type != NBT_NAME_PDC && name->type != NBT_NAME_LOGON) {
return;
}
samctx = samdb_connect(packet, iface->nbtsrv->task->event_ctx, iface->nbtsrv->task->lp_ctx, anonymous_session(packet, iface->nbtsrv->task->event_ctx, iface->nbtsrv->task->lp_ctx));
if (samctx == NULL) {
DEBUG(2,("Unable to open sam in getdc reply\n"));
return;
}
if (!samdb_is_pdc(samctx)) {
DEBUG(2, ("Not a PDC, so not processing LOGON_PRIMARY_QUERY\n"));
return;
}
partitions_basedn = samdb_partitions_dn(samctx, packet);
ret = gendb_search(samctx, packet, partitions_basedn, &ref_res, ref_attrs,
"(&(&(nETBIOSName=%s)(objectclass=crossRef))(ncName=*))",
name->name);
if (ret != 1) {
DEBUG(2,("Unable to find domain reference '%s' in sam\n", name->name));
return;
}
/* setup a GETDC reply */
ZERO_STRUCT(netlogon_response);
netlogon_response.response_type = NETLOGON_GET_PDC;
pdc = &netlogon_response.get_pdc;
pdc->command = NETLOGON_RESPONSE_FROM_PDC;
pdc->pdc_name = lp_netbios_name(iface->nbtsrv->task->lp_ctx);
pdc->unicode_pdc_name = pdc->pdc_name;
pdc->domain_name = samdb_result_string(ref_res[0], "nETBIOSName", name->name);;
pdc->nt_version = 1;
pdc->lmnt_token = 0xFFFF;
pdc->lm20_token = 0xFFFF;
dgram_mailslot_netlogon_reply(reply_iface->dgmsock,
packet,
lp_netbios_name(iface->nbtsrv->task->lp_ctx),
netlogon->req.pdc.mailslot_name,
&netlogon_response);
}
/*
reply to a ADS style GETDC request
*/
static void nbtd_netlogon_samlogon(struct dgram_mailslot_handler *dgmslot,
struct nbtd_interface *iface,
struct nbt_dgram_packet *packet,
const char *mailslot_name,
const struct socket_address *src,
struct nbt_netlogon_packet *netlogon)
{
struct nbt_name *name = &packet->data.msg.dest_name;
struct nbtd_interface *reply_iface = nbtd_find_reply_iface(iface, src->addr, false);
struct ldb_context *samctx;
const char *my_ip = reply_iface->ip_address;
struct dom_sid *sid;
struct nbt_netlogon_response netlogon_response;
NTSTATUS status;
if (!my_ip) {
DEBUG(0, ("Could not obtain own IP address for datagram socket\n"));
return;
}
/* only answer getdc requests on the PDC or LOGON names */
if (name->type != NBT_NAME_PDC && name->type != NBT_NAME_LOGON) {
return;
}
samctx = samdb_connect(packet, iface->nbtsrv->task->event_ctx, iface->nbtsrv->task->lp_ctx, anonymous_session(packet, iface->nbtsrv->task->event_ctx, iface->nbtsrv->task->lp_ctx));
if (samctx == NULL) {
DEBUG(2,("Unable to open sam in getdc reply\n"));
return;
}
if (netlogon->req.logon.sid_size) {
if (strcasecmp(mailslot_name, NBT_MAILSLOT_NTLOGON) == 0) {
DEBUG(2,("NBT netlogon query failed because SID specified in request to NTLOGON\n"));
/* SID not permitted on NTLOGON (for some reason...) */
return;
}
sid = &netlogon->req.logon.sid;
} else {
sid = NULL;
}
status = fill_netlogon_samlogon_response(samctx, packet, NULL, name->name, sid, NULL,
netlogon->req.logon.user_name, src->addr,
netlogon->req.logon.nt_version, iface->nbtsrv->task->lp_ctx, &netlogon_response.samlogon);
if (!NT_STATUS_IS_OK(status)) {
DEBUG(2,("NBT netlogon query failed domain=%s sid=%s version=%d - %s\n",
name->name, dom_sid_string(packet, sid), netlogon->req.logon.nt_version, nt_errstr(status)));
return;
}
netlogon_response.response_type = NETLOGON_SAMLOGON;
packet->data.msg.dest_name.type = 0;
dgram_mailslot_netlogon_reply(reply_iface->dgmsock,
packet,
lp_netbios_name(iface->nbtsrv->task->lp_ctx),
netlogon->req.logon.mailslot_name,
&netlogon_response);
}
/*
handle incoming netlogon mailslot requests
*/
void nbtd_mailslot_netlogon_handler(struct dgram_mailslot_handler *dgmslot,
struct nbt_dgram_packet *packet,
const char *mailslot_name,
struct socket_address *src)
{
NTSTATUS status = NT_STATUS_NO_MEMORY;
struct nbtd_interface *iface =
talloc_get_type(dgmslot->private, struct nbtd_interface);
struct nbt_netlogon_packet *netlogon =
talloc(dgmslot, struct nbt_netlogon_packet);
struct nbtd_iface_name *iname;
struct nbt_name *name = &packet->data.msg.dest_name;
if (netlogon == NULL) goto failed;
/*
see if the we are listening on the destination netbios name
*/
iname = nbtd_find_iname(iface, name, 0);
if (iname == NULL) {
status = NT_STATUS_BAD_NETWORK_NAME;
goto failed;
}
DEBUG(2,("netlogon request to %s from %s:%d\n",
nbt_name_string(netlogon, name), src->addr, src->port));
status = dgram_mailslot_netlogon_parse_request(dgmslot, netlogon, packet, netlogon);
if (!NT_STATUS_IS_OK(status)) goto failed;
switch (netlogon->command) {
case LOGON_PRIMARY_QUERY:
nbtd_netlogon_getdc(dgmslot, iface, packet, mailslot_name,
src, netlogon);
break;
case LOGON_SAM_LOGON_REQUEST:
nbtd_netlogon_samlogon(dgmslot, iface, packet, mailslot_name,
src, netlogon);
break;
default:
DEBUG(2,("unknown netlogon op %d from %s:%d\n",
netlogon->command, src->addr, src->port));
NDR_PRINT_DEBUG(nbt_netlogon_packet, netlogon);
break;
}
talloc_free(netlogon);
return;
failed:
DEBUG(2,("nbtd netlogon handler failed from %s:%d to %s - %s\n",
src->addr, src->port, nbt_name_string(netlogon, name),
nt_errstr(status)));
talloc_free(netlogon);
}
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