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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 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 "dlinklist.h"
#include "nbt_server/nbt_server.h"
#include "smbd/service_task.h"
#include "lib/socket/socket.h"
/*
reply to a GETDC request
*/
static void nbtd_netlogon_getdc(struct dgram_mailslot_handler *dgmslot,
struct nbt_dgram_packet *packet,
const char *src_address, int src_port,
struct nbt_netlogon_packet *netlogon)
{
struct nbt_name *name = &packet->data.msg.dest_name;
struct nbt_netlogon_packet reply;
struct nbt_netlogon_response_from_pdc *pdc;
/* only answer getdc requests on the PDC or LOGON names */
if (name->type != NBT_NAME_PDC && name->type != NBT_NAME_LOGON) {
return;
}
/* setup a GETDC reply */
ZERO_STRUCT(reply);
reply.command = NETLOGON_RESPONSE_FROM_PDC;
pdc = &reply.req.response;
pdc->pdc_name = lp_netbios_name();
pdc->unicode_pdc_name = pdc->pdc_name;
pdc->domain_name = lp_workgroup();
pdc->nt_version = 1;
pdc->lmnt_token = 0xFFFF;
pdc->lm20_token = 0xFFFF;
packet->data.msg.dest_name.type = 0;
dgram_mailslot_netlogon_reply(dgmslot->dgmsock,
packet,
netlogon->req.pdc.mailslot_name,
&reply);
}
/*
reply to a ADS style GETDC request
*/
static void nbtd_netlogon_getdc2(struct dgram_mailslot_handler *dgmslot,
struct nbt_dgram_packet *packet,
const char *src_address, int src_port,
struct nbt_netlogon_packet *netlogon)
{
struct nbt_name *name = &packet->data.msg.dest_name;
struct nbt_netlogon_packet reply;
struct nbt_netlogon_response_from_pdc2 *pdc;
struct ldb_context *samctx;
const char *attrs[] = {"realm", "dnsDomain", "objectGUID", NULL};
struct ldb_message **res;
int ret;
const char **services = lp_server_services();
/* 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);
if (samctx == NULL) {
DEBUG(2,("Unable to open sam in getdc reply\n"));
return;
}
/* try and find the domain */
ret = gendb_search(samctx, samctx, NULL, &res, attrs,
"(&(name=%s)(objectClass=domainDNS))", name->name);
if (ret != 1) {
DEBUG(2,("Unable to find domain '%s' in sam\n", name->name));
return;
}
/* setup a GETDC reply */
ZERO_STRUCT(reply);
if (netlogon->req.pdc2.user_name[0]) {
reply.command = NETLOGON_RESPONSE_FROM_PDC_USER;
} else {
reply.command = NETLOGON_RESPONSE_FROM_PDC2;
}
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 (lp_parm_bool(-1, "gensec", "krb5", True)) {
pdc->server_type |= NBT_SERVER_KDC;
}
if (str_list_check(services, "ldap")) {
pdc->server_type |= NBT_SERVER_LDAP;
}
pdc->domain_uuid = samdb_result_guid(res[0], "objectGUID");
pdc->forest = samdb_result_string(res[0], "realm", lp_realm());
pdc->dns_domain = samdb_result_string(res[0], "dnsDomain", lp_realm());
/* TODO: get our full DNS name from somewhere else */
pdc->pdc_dns_name = talloc_asprintf(packet, "%s.%s",
lp_netbios_name(), pdc->dns_domain);
pdc->domain = name->name;
pdc->pdc_name = lp_netbios_name();
pdc->user_name = netlogon->req.pdc2.user_name;
/* TODO: we need to make sure these are in our DNS zone */
pdc->site_name = "Default-First-Site-Name";
pdc->site_name2 = "Default-First-Site-Name";
pdc->unknown = 0x10; /* what is this? */
pdc->unknown2 = 2; /* and this ... */
pdc->pdc_ip = socket_get_my_addr(dgmslot->dgmsock->sock, packet);
pdc->nt_version = 13;
pdc->lmnt_token = 0xFFFF;
pdc->lm20_token = 0xFFFF;
packet->data.msg.dest_name.type = 0;
dgram_mailslot_netlogon_reply(dgmslot->dgmsock,
packet,
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,
const char *src_address, int src_port)
{
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_address, 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, packet, src_address, src_port, netlogon);
break;
case NETLOGON_QUERY_FOR_PDC2:
nbtd_netlogon_getdc2(dgmslot, packet, src_address, src_port, netlogon);
break;
default:
DEBUG(2,("unknown netlogon op %d from %s:%d\n",
netlogon->command, src_address, src_port));
NDR_PRINT_DEBUG(nbt_netlogon_packet, netlogon);
break;
}
talloc_free(netlogon);
return;
failed:
DEBUG(2,("nbtd netlogon handler failed from %s:%d - %s\n",
src_address, src_port, nt_errstr(status)));
talloc_free(netlogon);
}
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