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/*
Unix SMB/CIFS implementation.
NBT datagram netlogon server
Copyright (C) Andrew Tridgell 2005
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 "librpc/gen_ndr/ndr_nbt.h"
#include "param/param.h"
#include "smbd/service_task.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 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_packet reply;
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;
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->lp_ctx, anonymous_session(packet, iface->nbtsrv->task->lp_ctx));
if (samctx == NULL) {
DEBUG(2,("Unable to open sam in getdc reply\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(reply);
reply.command = NETLOGON_RESPONSE_FROM_PDC;
pdc = &reply.req.response;
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;
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.pdc.mailslot_name,
&reply);
}
/*
reply to a ADS style GETDC request
*/
static void nbtd_netlogon_getdc2(struct dgram_mailslot_handler *dgmslot,
struct nbtd_interface *iface,
struct nbt_dgram_packet *packet,
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_packet reply;
struct nbt_netlogon_response_from_pdc2 *pdc;
struct ldb_context *samctx;
const char *ref_attrs[] = {"nETBIOSName", "dnsRoot", "ncName", NULL};
const char *dom_attrs[] = {"objectGUID", NULL};
struct ldb_message **ref_res, **dom_res;
int ret;
const char **services = lp_server_services(iface->nbtsrv->task->lp_ctx);
const char *my_ip = reply_iface->ip_address;
struct ldb_dn *partitions_basedn;
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->lp_ctx, anonymous_session(packet, iface->nbtsrv->task->lp_ctx));
if (samctx == NULL) {
DEBUG(2,("Unable to open sam in getdc reply\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;
}
/* try and find the domain */
ret = gendb_search_dn(samctx, packet,
samdb_result_dn(samctx, samctx, ref_res[0], "ncName", NULL),
&dom_res, dom_attrs);
if (ret != 1) {
DEBUG(2,("Unable to find domain from reference '%s' in sam\n",
ldb_dn_get_linearized(ref_res[0]->dn)));
return;
}
/* setup a GETDC reply */
ZERO_STRUCT(reply);
reply.command = NETLOGON_RESPONSE_FROM_PDC2;
#if 0
/* newer testing shows that the reply command type is not
changed based on whether a username is given in the
reply. This was what was causing the w2k join to be so
slow */
if (netlogon->req.pdc2.user_name[0]) {
reply.command = NETLOGON_RESPONSE_FROM_PDC_USER;
}
#endif
pdc = &reply.req.response2;
/* TODO: accurately depict which services we are running */
pdc->server_type =
NBT_SERVER_PDC | NBT_SERVER_GC |
NBT_SERVER_DS | NBT_SERVER_TIMESERV |
NBT_SERVER_CLOSEST | NBT_SERVER_WRITABLE |
NBT_SERVER_GOOD_TIMESERV;
/* hmm, probably a better way to do this */
if (str_list_check(services, "ldap")) {
pdc->server_type |= NBT_SERVER_LDAP;
}
if (str_list_check(services, "kdc")) {
pdc->server_type |= NBT_SERVER_KDC;
}
pdc->domain_uuid = samdb_result_guid(dom_res[0], "objectGUID");
pdc->forest = samdb_result_string(ref_res[0], "dnsRoot",
lp_realm(iface->nbtsrv->task->lp_ctx));
pdc->dns_domain = samdb_result_string(ref_res[0], "dnsRoot",
lp_realm(iface->nbtsrv->task->lp_ctx));
/* TODO: get our full DNS name from somewhere else */
pdc->pdc_dns_name = talloc_asprintf(packet, "%s.%s",
strlower_talloc(packet,
lp_netbios_name(iface->nbtsrv->task->lp_ctx)),
pdc->dns_domain);
pdc->domain = samdb_result_string(ref_res[0], "nETBIOSName", name->name);;
pdc->pdc_name = lp_netbios_name(iface->nbtsrv->task->lp_ctx);
pdc->user_name = netlogon->req.pdc2.user_name;
/* TODO: we need to make sure these are in our DNS zone */
pdc->server_site = "Default-First-Site-Name";
pdc->client_site = "Default-First-Site-Name";
pdc->unknown = 0x10; /* what is this? */
pdc->unknown2 = 2; /* and this ... */
pdc->pdc_ip = my_ip;
pdc->nt_version = 13;
pdc->lmnt_token = 0xFFFF;
pdc->lm20_token = 0xFFFF;
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.pdc2.mailslot_name,
&reply);
}
/*
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, 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(dgmslot, netlogon, packet, netlogon);
if (!NT_STATUS_IS_OK(status)) goto failed;
switch (netlogon->command) {
case NETLOGON_QUERY_FOR_PDC:
nbtd_netlogon_getdc(dgmslot, iface, packet, src, netlogon);
break;
case NETLOGON_QUERY_FOR_PDC2:
nbtd_netlogon_getdc2(dgmslot, iface, packet, 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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