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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 <ldb.h>
#include "dsdb/samdb/samdb.h"
#include "auth/auth.h"
#include "param/param.h"
#include "smbd/service_task.h"
#include "dsdb/samdb/ldb_modules/util.h"
#include "libcli/security/security.h"
#include "nbt_server/dgram/proto.h"
#include "libds/common/roles.h"
/*
reply to a GETDC request
*/
static NTSTATUS nbtd_netlogon_getdc(struct nbtd_server *nbtsrv,
struct nbt_dgram_packet *packet,
const struct socket_address *src,
struct nbt_netlogon_packet *netlogon,
TALLOC_CTX *mem_ctx,
struct nbt_netlogon_response **presponse)
{
struct nbt_name *name = &packet->data.msg.dest_name;
struct nbt_netlogon_response_from_pdc *pdc;
struct ldb_context *samctx;
struct nbt_netlogon_response *response;
/* only answer getdc requests on the PDC or LOGON names */
if (name->type != NBT_NAME_PDC && name->type != NBT_NAME_LOGON) {
return NT_STATUS_NOT_SUPPORTED;
}
samctx = nbtsrv->sam_ctx;
if (lpcfg_server_role(nbtsrv->task->lp_ctx) != ROLE_ACTIVE_DIRECTORY_DC
|| !samdb_is_pdc(samctx)) {
DEBUG(2, ("Not a PDC, so not processing LOGON_PRIMARY_QUERY\n"));
return NT_STATUS_NOT_SUPPORTED;
}
if (strcasecmp_m(name->name, lpcfg_workgroup(nbtsrv->task->lp_ctx)) != 0) {
DEBUG(5,("GetDC requested for a domian %s that we don't host\n", name->name));
return NT_STATUS_NOT_SUPPORTED;
}
/* setup a GETDC reply */
response = talloc_zero(mem_ctx, struct nbt_netlogon_response);
if (response == NULL) {
return NT_STATUS_NO_MEMORY;
}
response->response_type = NETLOGON_GET_PDC;
pdc = &response->data.get_pdc;
pdc->command = NETLOGON_RESPONSE_FROM_PDC;
pdc->pdc_name = talloc_strdup(
response, lpcfg_netbios_name(nbtsrv->task->lp_ctx));
if (pdc->pdc_name == NULL) {
TALLOC_FREE(response);
return NT_STATUS_NO_MEMORY;
}
pdc->unicode_pdc_name = pdc->pdc_name;
pdc->domain_name = talloc_strdup(
response, lpcfg_workgroup(nbtsrv->task->lp_ctx));
if (pdc->domain_name == NULL) {
TALLOC_FREE(response);
return NT_STATUS_NO_MEMORY;
}
pdc->nt_version = 1;
pdc->lmnt_token = 0xFFFF;
pdc->lm20_token = 0xFFFF;
*presponse = response;
return NT_STATUS_OK;
}
/*
reply to a ADS style GETDC request
*/
static NTSTATUS nbtd_netlogon_samlogon(
struct nbtd_server *nbtsrv,
struct nbt_dgram_packet *packet,
const struct socket_address *src,
struct nbt_netlogon_packet *netlogon,
TALLOC_CTX *mem_ctx,
struct nbt_netlogon_response **presponse)
{
struct nbt_name *name = &packet->data.msg.dest_name;
struct ldb_context *samctx;
struct dom_sid *sid;
struct nbt_netlogon_response *response;
NTSTATUS status;
/* only answer getdc requests on the PDC or LOGON names */
if (name->type != NBT_NAME_PDC && name->type != NBT_NAME_LOGON) {
return NT_STATUS_NOT_SUPPORTED;
}
samctx = nbtsrv->sam_ctx;
if (netlogon->req.logon.sid_size) {
sid = &netlogon->req.logon.sid;
} else {
sid = NULL;
}
response = talloc_zero(mem_ctx, struct nbt_netlogon_response);
if (response == NULL) {
return NT_STATUS_NO_MEMORY;
}
response->response_type = NETLOGON_SAMLOGON;
status = fill_netlogon_samlogon_response(
samctx, response, NULL, name->name, sid, NULL,
netlogon->req.logon.user_name,
netlogon->req.logon.acct_control, src->addr,
netlogon->req.logon.nt_version, nbtsrv->task->lp_ctx,
&response->data.samlogon, false);
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)));
TALLOC_FREE(response);
return status;
}
*presponse = response;
return NT_STATUS_OK;
}
/*
handle incoming netlogon mailslot requests
*/
void nbtd_mailslot_netlogon_handler(struct dgram_mailslot_handler *dgmslot,
struct nbt_dgram_packet *packet,
struct socket_address *src)
{
NTSTATUS status = NT_STATUS_NO_MEMORY;
struct nbtd_interface *iface =
talloc_get_type(dgmslot->private_data, struct nbtd_interface);
struct nbt_netlogon_packet *netlogon = NULL;
struct nbtd_interface *reply_iface = nbtd_find_reply_iface(
iface, src->addr, false);
struct nbtd_iface_name *iname;
struct nbt_name *name = &packet->data.msg.dest_name;
struct nbt_netlogon_response *response;
if (reply_iface->ip_address == NULL) {
DBG_WARNING("Could not obtain own IP address for datagram "
"socket\n");
goto failed;
}
netlogon = talloc(dgmslot, struct nbt_netlogon_packet);
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(5,("netlogon request to %s from %s:%d\n",
nbt_name_string(netlogon, name), src->addr, src->port));
status = dgram_mailslot_netlogon_parse_request(netlogon, packet,
netlogon);
if (!NT_STATUS_IS_OK(status)) goto failed;
switch (netlogon->command) {
case LOGON_PRIMARY_QUERY:
status = nbtd_netlogon_getdc(iface->nbtsrv, packet, src,
netlogon, netlogon, &response);
break;
case LOGON_SAM_LOGON_REQUEST:
status = nbtd_netlogon_samlogon(iface->nbtsrv, packet, src,
netlogon, netlogon, &response);
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);
status = NT_STATUS_NOT_SUPPORTED;
break;
}
if (NT_STATUS_IS_OK(status)) {
dgram_mailslot_netlogon_reply(
reply_iface->dgmsock, packet,
lpcfg_netbios_name(iface->nbtsrv->task->lp_ctx),
netlogon->req.logon.mailslot_name, response);
}
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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