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-rw-r--r--source4/nbt_server/winsclient.c123
1 files changed, 123 insertions, 0 deletions
diff --git a/source4/nbt_server/winsclient.c b/source4/nbt_server/winsclient.c
new file mode 100644
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+++ b/source4/nbt_server/winsclient.c
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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->nbtsrv, 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;
+}