s3:smbd: add support for SMB2 Keepalive (SMB2 Echo)

metze

1 files changed, 55 insertions, 0 deletions

diff --git a/source3/smbd/smb2_keepalive.c b/source3/smbd/smb2_keepalive.c
new file mode 100644
index 00000000000..0028fd36084
--- /dev/null
+++ b/source3/smbd/smb2_keepalive.c
@@ -0,0 +1,55 @@
+/*
+   Unix SMB/CIFS implementation.
+   Core SMB2 server
+
+   Copyright (C) Stefan Metzmacher 2009
+
+   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/globals.h"
+#include "../source4/libcli/smb2/smb2_constants.h"
+
+NTSTATUS smbd_smb2_request_process_keepalive(struct smbd_smb2_request *req)
+{
+	const uint8_t *inbody;
+	int i = req->current_idx;
+	DATA_BLOB outbody;
+	size_t expected_body_size = 0x04;
+	size_t body_size;
+
+	if (req->in.vector[i+1].iov_len != (expected_body_size & 0xFFFFFFFE)) {
+		return smbd_smb2_request_error(req, NT_STATUS_INVALID_PARAMETER);
+	}
+
+	inbody = (const uint8_t *)req->in.vector[i+1].iov_base;
+
+	body_size = SVAL(inbody, 0x00);
+	if (body_size != expected_body_size) {
+		return smbd_smb2_request_error(req, NT_STATUS_INVALID_PARAMETER);
+	}
+
+	/* TODO: update some time stamps */
+
+	outbody = data_blob_talloc(req->out.vector, NULL, 0x04);
+	if (outbody.data == NULL) {
+		return smbd_smb2_request_error(req, NT_STATUS_NO_MEMORY);
+	}
+
+	SSVAL(outbody.data, 0x00, 0x04);	/* struct size */
+	SSVAL(outbody.data, 0x02, 0);		/* reserved */
+
+	return smbd_smb2_request_done(req, outbody, NULL);
+}