s3:smbd: add marshalling layer for SMB2 Break support (SMB 2.002 only)

metze

1 files changed, 214 insertions, 0 deletions

diff --git a/source3/smbd/smb2_break.c b/source3/smbd/smb2_break.c
new file mode 100644
index 0000000000..25952fdf0d
--- /dev/null
+++ b/source3/smbd/smb2_break.c
@@ -0,0 +1,214 @@
+/*
+   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"
+
+static struct tevent_req *smbd_smb2_oplock_break_send(TALLOC_CTX *mem_ctx,
+						      struct tevent_context *ev,
+						      struct smbd_smb2_request *smb2req,
+						      uint8_t in_oplock_level,
+						      uint64_t in_file_id_volatile);
+static NTSTATUS smbd_smb2_oplock_break_recv(struct tevent_req *req,
+					    uint8_t *out_oplock_level);
+
+static void smbd_smb2_request_oplock_break_done(struct tevent_req *subreq);
+NTSTATUS smbd_smb2_request_process_break(struct smbd_smb2_request *req)
+{
+	const uint8_t *inhdr;
+	const uint8_t *inbody;
+	int i = req->current_idx;
+	size_t expected_body_size = 0x18;
+	size_t body_size;
+	uint8_t in_oplock_level;
+	uint64_t in_file_id_persistent;
+	uint64_t in_file_id_volatile;
+	struct tevent_req *subreq;
+
+	inhdr = (const uint8_t *)req->in.vector[i+0].iov_base;
+	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);
+	}
+
+	in_oplock_level		= CVAL(inbody, 0x02);
+	/* 0x03 1 bytes reserved */
+	/* 0x04 4 bytes reserved */
+	in_file_id_persistent		= BVAL(inbody, 0x08);
+	in_file_id_volatile		= BVAL(inbody, 0x10);
+
+	if (req->compat_chain_fsp) {
+		/* skip check */
+	} else if (in_file_id_persistent != 0) {
+		return smbd_smb2_request_error(req, NT_STATUS_FILE_CLOSED);
+	}
+
+	subreq = smbd_smb2_oplock_break_send(req,
+					     req->conn->smb2.event_ctx,
+					     req,
+					     in_oplock_level,
+					     in_file_id_volatile);
+	if (subreq == NULL) {
+		return smbd_smb2_request_error(req, NT_STATUS_NO_MEMORY);
+	}
+	tevent_req_set_callback(subreq, smbd_smb2_request_oplock_break_done, req);
+
+	if (tevent_req_is_in_progress(subreq)) {
+		return smbd_smb2_request_pending_queue(req);
+	}
+
+	return NT_STATUS_OK;
+}
+
+static void smbd_smb2_request_oplock_break_done(struct tevent_req *subreq)
+{
+	struct smbd_smb2_request *req = tevent_req_callback_data(subreq,
+					struct smbd_smb2_request);
+	const uint8_t *inbody;
+	int i = req->current_idx;
+	uint64_t in_file_id_persistent;
+	uint64_t in_file_id_volatile;
+	uint8_t out_oplock_level;
+	DATA_BLOB outbody;
+	NTSTATUS status;
+	NTSTATUS error; /* transport error */
+
+	status = smbd_smb2_oplock_break_recv(subreq, &out_oplock_level);
+	TALLOC_FREE(subreq);
+	if (!NT_STATUS_IS_OK(status)) {
+		error = smbd_smb2_request_error(req, status);
+		if (!NT_STATUS_IS_OK(error)) {
+			smbd_server_connection_terminate(req->conn,
+							 nt_errstr(error));
+			return;
+		}
+		return;
+	}
+
+	inbody = (const uint8_t *)req->in.vector[i+1].iov_base;
+
+	in_file_id_persistent	= BVAL(inbody, 0x08);
+	in_file_id_volatile	= BVAL(inbody, 0x10);
+
+	outbody = data_blob_talloc(req->out.vector, NULL, 0x18);
+	if (outbody.data == NULL) {
+		error = smbd_smb2_request_error(req, NT_STATUS_NO_MEMORY);
+		if (!NT_STATUS_IS_OK(error)) {
+			smbd_server_connection_terminate(req->conn,
+							 nt_errstr(error));
+			return;
+		}
+		return;
+	}
+
+	SSVAL(outbody.data, 0x00, 0x18);	/* struct size */
+	SCVAL(outbody.data, 0x02,
+	      out_oplock_level);		/* oplock level */
+	SCVAL(outbody.data, 0x03, 0);		/* reserved */
+	SIVAL(outbody.data, 0x04, 0);		/* reserved */
+	SBVAL(outbody.data, 0x08,
+	      in_file_id_persistent);		/* file id (persistent) */
+	SBVAL(outbody.data, 0x10,
+	      in_file_id_volatile);		/* file id (volatile) */
+
+	error = smbd_smb2_request_done(req, outbody, NULL);
+	if (!NT_STATUS_IS_OK(error)) {
+		smbd_server_connection_terminate(req->conn,
+						 nt_errstr(error));
+		return;
+	}
+}
+
+struct smbd_smb2_oplock_break_state {
+	struct smbd_smb2_request *smb2req;
+	uint8_t out_oplock_level;
+};
+
+static struct tevent_req *smbd_smb2_oplock_break_send(TALLOC_CTX *mem_ctx,
+						      struct tevent_context *ev,
+						      struct smbd_smb2_request *smb2req,
+						      uint8_t in_oplock_level,
+						      uint64_t in_file_id_volatile)
+{
+	struct tevent_req *req;
+	struct smbd_smb2_oplock_break_state *state;
+	struct smb_request *smbreq;
+	connection_struct *conn = smb2req->tcon->compat_conn;
+	files_struct *fsp;
+
+	req = tevent_req_create(mem_ctx, &state,
+				struct smbd_smb2_oplock_break_state);
+	if (req == NULL) {
+		return NULL;
+	}
+	state->smb2req = smb2req;
+	state->out_oplock_level = SMB2_OPLOCK_LEVEL_NONE;
+
+	DEBUG(10,("smbd_smb2_oplock_break_send: file_id[0x%016llX]\n",
+		  (unsigned long long)in_file_id_volatile));
+
+	smbreq = smbd_smb2_fake_smb_request(smb2req);
+	if (tevent_req_nomem(smbreq, req)) {
+		return tevent_req_post(req, ev);
+	}
+
+	fsp = file_fsp(smbreq, (uint16_t)in_file_id_volatile);
+	if (fsp == NULL) {
+		tevent_req_nterror(req, NT_STATUS_FILE_CLOSED);
+		return tevent_req_post(req, ev);
+	}
+	if (conn != fsp->conn) {
+		tevent_req_nterror(req, NT_STATUS_FILE_CLOSED);
+		return tevent_req_post(req, ev);
+	}
+	if (smb2req->session->vuid != fsp->vuid) {
+		tevent_req_nterror(req, NT_STATUS_FILE_CLOSED);
+		return tevent_req_post(req, ev);
+	}
+
+	tevent_req_nterror(req, NT_STATUS_NOT_IMPLEMENTED);
+	return tevent_req_post(req, ev);
+}
+
+static NTSTATUS smbd_smb2_oplock_break_recv(struct tevent_req *req,
+					    uint8_t *out_oplock_level)
+{
+	NTSTATUS status;
+	struct smbd_smb2_oplock_break_state *state =
+		tevent_req_data(req,
+		struct smbd_smb2_oplock_break_state);
+
+	if (tevent_req_is_nterror(req, &status)) {
+		tevent_req_received(req);
+		return status;
+	}
+
+	*out_oplock_level = state->out_oplock_level;
+
+	tevent_req_received(req);
+	return NT_STATUS_OK;
+}