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/*
Unix SMB/CIFS implementation.
irpc services for the NBT server
Copyright (C) Andrew Tridgell 2005
Copyright (C) Volker Lendecke 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 "smbd/service_task.h"
#include "smbd/service.h"
#include "nbt_server/nbt_server.h"
#include "nbt_server/wins/winsserver.h"
#include "librpc/gen_ndr/ndr_irpc.h"
#include "lib/socket/socket.h"
#include "libcli/resolve/resolve.h"
#include "librpc/gen_ndr/ndr_nbt.h"
/*
serve out the nbt statistics
*/
static NTSTATUS nbtd_information(struct irpc_message *msg,
struct nbtd_information *r)
{
struct nbtd_server *server = talloc_get_type(msg->private, struct nbtd_server);
switch (r->in.level) {
case NBTD_INFO_STATISTICS:
r->out.info.stats = &server->stats;
break;
}
return NT_STATUS_OK;
}
/*
winbind needs to be able to do a getdc request, but most (all?) windows
servers always send the reply to port 138, regardless of the request
port. To cope with this we use a irpc request to the NBT server
which has port 138 open, and thus can receive the replies
*/
struct getdc_state {
struct irpc_message *msg;
struct nbtd_getdcname *req;
};
static void getdc_recv_netlogon_reply(struct dgram_mailslot_handler *dgmslot,
struct nbt_dgram_packet *packet,
struct socket_address *src)
{
struct getdc_state *s =
talloc_get_type(dgmslot->private, struct getdc_state);
const char *p;
struct nbt_netlogon_response netlogon;
NTSTATUS status;
status = dgram_mailslot_netlogon_parse(dgmslot, packet, packet,
&netlogon);
if (!NT_STATUS_IS_OK(status)) {
DEBUG(5, ("dgram_mailslot_ntlogon_parse failed: %s\n",
nt_errstr(status)));
goto done;
}
/* We asked for version 1 only */
if (netlogon.response_type == NETLOGON_SAMLOGON
&& netlogon.samlogon.ntver != NETLOGON_NT_VERSION_1) {
status = NT_STATUS_INVALID_NETWORK_RESPONSE;
goto done;
}
status = NT_STATUS_NO_LOGON_SERVERS;
p = netlogon.samlogon.nt4.server;
DEBUG(10, ("NTLOGON_SAM_LOGON_REPLY: server: %s, user: %s, "
"domain: %s\n", p, netlogon.samlogon.nt4.user_name,
netlogon.samlogon.nt4.domain));
if (*p == '\\') p += 1;
if (*p == '\\') p += 1;
s->req->out.dcname = talloc_strdup(s->req, p);
if (s->req->out.dcname == NULL) {
DEBUG(0, ("talloc failed\n"));
status = NT_STATUS_NO_MEMORY;
goto done;
}
done:
irpc_send_reply(s->msg, status);
}
static NTSTATUS nbtd_getdcname(struct irpc_message *msg,
struct nbtd_getdcname *req)
{
struct nbtd_server *server =
talloc_get_type(msg->private, struct nbtd_server);
struct nbtd_interface *iface = nbtd_find_request_iface(server, req->in.ip_address, true);
struct getdc_state *s;
struct nbt_netlogon_packet p;
struct NETLOGON_SAM_LOGON_REQUEST *r;
struct nbt_name src, dst;
struct socket_address *dest;
struct dgram_mailslot_handler *handler;
NTSTATUS status = NT_STATUS_UNSUCCESSFUL;
DEBUG(0, ("nbtd_getdcname called\n"));
s = talloc(msg, struct getdc_state);
NT_STATUS_HAVE_NO_MEMORY(s);
s->msg = msg;
s->req = req;
handler = dgram_mailslot_temp(iface->dgmsock, NBT_MAILSLOT_GETDC,
getdc_recv_netlogon_reply, s);
NT_STATUS_HAVE_NO_MEMORY(handler);
ZERO_STRUCT(p);
p.command = LOGON_SAM_LOGON_REQUEST;
r = &p.req.logon;
r->request_count = 0;
r->computer_name = req->in.my_computername;
r->user_name = req->in.my_accountname;
r->mailslot_name = handler->mailslot_name;
r->acct_control = req->in.account_control;
r->sid = *req->in.domain_sid;
r->nt_version = NETLOGON_NT_VERSION_1;
r->lmnt_token = 0xffff;
r->lm20_token = 0xffff;
make_nbt_name_client(&src, req->in.my_computername);
make_nbt_name(&dst, req->in.domainname, 0x1c);
dest = socket_address_from_strings(msg, iface->dgmsock->sock->backend_name,
req->in.ip_address, 138);
NT_STATUS_HAVE_NO_MEMORY(dest);
status = dgram_mailslot_netlogon_send(iface->dgmsock,
&dst, dest,
NBT_MAILSLOT_NETLOGON,
&src, &p);
if (!NT_STATUS_IS_OK(status)) {
DEBUG(0, ("dgram_mailslot_ntlogon_send failed: %s\n",
nt_errstr(status)));
return status;
}
msg->defer_reply = true;
return NT_STATUS_OK;
}
/*
register the irpc handlers for the nbt server
*/
void nbtd_register_irpc(struct nbtd_server *nbtsrv)
{
NTSTATUS status;
struct task_server *task = nbtsrv->task;
status = IRPC_REGISTER(task->msg_ctx, irpc, NBTD_INFORMATION,
nbtd_information, nbtsrv);
if (!NT_STATUS_IS_OK(status)) {
task_server_terminate(task, "nbtd failed to setup monitoring");
return;
}
status = IRPC_REGISTER(task->msg_ctx, irpc, NBTD_GETDCNAME,
nbtd_getdcname, nbtsrv);
if (!NT_STATUS_IS_OK(status)) {
task_server_terminate(task, "nbtd failed to setup getdcname "
"handler");
return;
}
status = IRPC_REGISTER(task->msg_ctx, irpc, NBTD_PROXY_WINS_CHALLENGE,
nbtd_proxy_wins_challenge, nbtsrv);
if (!NT_STATUS_IS_OK(status)) {
task_server_terminate(task, "nbtd failed to setup wins challenge "
"handler");
return;
}
status = IRPC_REGISTER(task->msg_ctx, irpc, NBTD_PROXY_WINS_RELEASE_DEMAND,
nbtd_proxy_wins_release_demand, nbtsrv);
if (!NT_STATUS_IS_OK(status)) {
task_server_terminate(task, "nbtd failed to setup wins release demand "
"handler");
return;
}
}
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