Adding upstream version 2:4.20.0+dfsg.upstream/2%4.20.0+dfsg

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 150 insertions, 0 deletions

diff --git a/source4/nbt_server/dgram/request.c b/source4/nbt_server/dgram/request.c
new file mode 100644
index 0000000..ea2b6e8
--- /dev/null
+++ b/source4/nbt_server/dgram/request.c
@@ -0,0 +1,150 @@
+/* 
+   Unix SMB/CIFS implementation.
+
+   NBT datagram 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 "samba/service_task.h"
+#include "lib/socket/socket.h"
+#include "libcli/resolve/resolve.h"
+#include "nbt_server/dgram/proto.h"
+#include "librpc/gen_ndr/ndr_nbt.h"
+#include "param/param.h"
+
+/*
+  a list of mailslots that we have static handlers for
+*/
+static const struct {
+	const char *mailslot_name;
+	dgram_mailslot_handler_t handler;
+} mailslot_handlers[] = {
+	/* Handle both NTLOGON and NETLOGON in the same function, as
+	 * they are very similar */
+	{ NBT_MAILSLOT_NETLOGON, nbtd_mailslot_netlogon_handler },
+	{ NBT_MAILSLOT_NTLOGON,  nbtd_mailslot_netlogon_handler },
+	{ NBT_MAILSLOT_BROWSE,   nbtd_mailslot_browse_handler }
+};
+
+/*
+  receive an incoming dgram request. This is used for general datagram
+  requests. Mailslot requests for our listening mailslots
+  are handled in the specific mailslot handlers
+*/
+void dgram_request_handler(struct nbt_dgram_socket *dgmsock, 
+			   struct nbt_dgram_packet *packet,
+			   struct socket_address *src)
+{
+	DEBUG(0,("General datagram request from %s:%d\n", src->addr, src->port));
+	NDR_PRINT_DEBUG(nbt_dgram_packet, packet);
+}
+
+
+/*
+  setup the port 138 datagram listener for a given interface
+*/
+NTSTATUS nbtd_dgram_setup(struct nbtd_interface *iface, const char *bind_address)
+{
+	struct nbt_dgram_socket *bcast_dgmsock = NULL;
+	struct nbtd_server *nbtsrv = iface->nbtsrv;
+	struct socket_address *bcast_addr, *bind_addr;
+	NTSTATUS status;
+	TALLOC_CTX *tmp_ctx = talloc_new(iface);
+	/* the list of mailslots that we are interested in */
+	size_t i;
+
+	if (!tmp_ctx) {
+		return NT_STATUS_NO_MEMORY;
+	}
+
+	if (strcmp("0.0.0.0", iface->netmask) != 0) {
+		/* listen for broadcasts on port 138 */
+		bcast_dgmsock = nbt_dgram_socket_init(iface, nbtsrv->task->event_ctx);
+		if (!bcast_dgmsock) {
+			talloc_free(tmp_ctx);
+			return NT_STATUS_NO_MEMORY;
+		}
+	
+		bcast_addr = socket_address_from_strings(tmp_ctx, bcast_dgmsock->sock->backend_name, 
+							 iface->bcast_address, 
+							 lpcfg_dgram_port(iface->nbtsrv->task->lp_ctx));
+		if (!bcast_addr) {
+			talloc_free(tmp_ctx);
+			return NT_STATUS_NO_MEMORY;
+		}
+
+		status = socket_listen(bcast_dgmsock->sock, bcast_addr, 0, 0);
+		if (!NT_STATUS_IS_OK(status)) {
+			talloc_free(tmp_ctx);
+			DEBUG(0,("Failed to bind to %s:%d - %s\n", 
+				 iface->bcast_address, lpcfg_dgram_port(iface->nbtsrv->task->lp_ctx),
+				 nt_errstr(status)));
+			return status;
+		}
+	
+		dgram_set_incoming_handler(bcast_dgmsock, dgram_request_handler, iface);
+	}
+
+	/* listen for unicasts on port 138 */
+	iface->dgmsock = nbt_dgram_socket_init(iface, nbtsrv->task->event_ctx);
+	if (!iface->dgmsock) {
+		talloc_free(tmp_ctx);
+		return NT_STATUS_NO_MEMORY;
+	}
+
+	bind_addr = socket_address_from_strings(tmp_ctx, iface->dgmsock->sock->backend_name, 
+						bind_address, lpcfg_dgram_port(iface->nbtsrv->task->lp_ctx));
+	if (!bind_addr) {
+		talloc_free(tmp_ctx);
+		return NT_STATUS_NO_MEMORY;
+	}
+
+	status = socket_listen(iface->dgmsock->sock, bind_addr, 0, 0);
+	if (!NT_STATUS_IS_OK(status)) {
+		talloc_free(tmp_ctx);
+		DEBUG(0,("Failed to bind to %s:%d - %s\n", 
+			 bind_address, lpcfg_dgram_port(iface->nbtsrv->task->lp_ctx), nt_errstr(status)));
+		return status;
+	}
+
+	dgram_set_incoming_handler(iface->dgmsock, dgram_request_handler, iface);
+
+	talloc_free(tmp_ctx);
+
+	for (i=0;i<ARRAY_SIZE(mailslot_handlers);i++) {
+		/* note that we don't need to keep the pointer
+		   to the dgmslot around - the callback is all
+		   we need */
+		struct dgram_mailslot_handler *dgmslot;
+
+		if (bcast_dgmsock) {
+			dgmslot = dgram_mailslot_listen(bcast_dgmsock, 
+						mailslot_handlers[i].mailslot_name,
+						mailslot_handlers[i].handler, iface);
+			NT_STATUS_HAVE_NO_MEMORY(dgmslot);
+		}
+
+		dgmslot = dgram_mailslot_listen(iface->dgmsock, 
+						mailslot_handlers[i].mailslot_name,
+						mailslot_handlers[i].handler, iface);
+		NT_STATUS_HAVE_NO_MEMORY(dgmslot);
+	}
+
+	return NT_STATUS_OK;
+}