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/*
Unix SMB/CIFS implementation.
wins client name registration and refresh
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 "nbt_server/nbt_server.h"
#include "libcli/raw/libcliraw.h"
#include "libcli/composite/composite.h"
#include "lib/events/events.h"
#include "smbd/service_task.h"
/*
refresh a WINS name registration
*/
static void nbtd_refresh_wins_refresh(struct event_context *ev, struct timed_event *te,
struct timeval t, void *private)
{
struct nbtd_iface_name *iname = talloc_get_type(private, struct nbtd_iface_name);
nbtd_winsclient_refresh(iname);
}
/*
called when a wins name refresh has completed
*/
static void nbtd_refresh_wins_handler(struct composite_context *c)
{
NTSTATUS status;
struct nbt_name_refresh_wins io;
struct nbtd_iface_name *iname = talloc_get_type(c->async.private,
struct nbtd_iface_name);
TALLOC_CTX *tmp_ctx = talloc_new(iname);
status = nbt_name_refresh_wins_recv(c, tmp_ctx, &io);
if (NT_STATUS_EQUAL(status, NT_STATUS_IO_TIMEOUT)) {
/* none of the WINS servers responded - try again
periodically */
int wins_retry_time = lp_parm_int(-1, "nbt", "wins_retry", 300);
event_add_timed(iname->iface->nbtsrv->task->event_ctx,
iname,
timeval_current_ofs(wins_retry_time, 0),
nbtd_refresh_wins_refresh,
iname);
talloc_free(tmp_ctx);
return;
}
if (!NT_STATUS_IS_OK(status)) {
DEBUG(1,("Name refresh failure with WINS for %s<%02x> - %s\n",
iname->name.name, iname->name.type, nt_errstr(status)));
talloc_free(tmp_ctx);
return;
}
if (io.out.rcode != 0) {
DEBUG(1,("WINS server %s rejected name refresh of %s<%02x> - rcode %d\n",
io.out.wins_server, iname->name.name, iname->name.type, io.out.rcode));
iname->nb_flags |= NBT_NM_CONFLICT;
talloc_free(tmp_ctx);
return;
}
/* success - start a periodic name refresh */
iname->nb_flags |= NBT_NM_ACTIVE;
if (iname->wins_server) {
talloc_free(iname->wins_server);
}
iname->wins_server = talloc_steal(iname, io.out.wins_server);
iname->registration_time = timeval_current();
event_add_timed(iname->iface->nbtsrv->task->event_ctx,
iname,
timeval_add(&iname->registration_time, iname->ttl/2, 0),
nbtd_refresh_wins_refresh,
iname);
talloc_free(tmp_ctx);
}
/*
refresh a name with our WINS servers
*/
void nbtd_winsclient_refresh(struct nbtd_iface_name *iname)
{
struct nbtd_interface *iface = iname->iface;
struct nbt_name_refresh_wins io;
struct composite_context *c;
/* setup a wins name refresh request */
io.in.name = iname->name;
io.in.wins_servers = lp_wins_server_list();
io.in.addresses = nbtd_address_list(iface, iname);
io.in.nb_flags = iname->nb_flags;
io.in.ttl = iname->ttl;
c = nbt_name_refresh_wins_send(iface->nbtsock, &io);
if (c == NULL) {
talloc_free(io.in.addresses);
return;
}
talloc_steal(c, io.in.addresses);
c->async.fn = nbtd_refresh_wins_handler;
c->async.private = iname;
}
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