libcli/smb: move smb2cli_read.c from source3 to the toplevel

Signed-off-by: Stefan Metzmacher <metze@samba.org>

3 files changed, 216 insertions, 0 deletions

diff --git a/libcli/smb/smb2cli_read.c b/libcli/smb/smb2cli_read.c
new file mode 100644
index 00000000000..29b9f378e67
--- /dev/null
+++ b/libcli/smb/smb2cli_read.c
@@ -0,0 +1,187 @@
+/*
+   Unix SMB/CIFS implementation.
+   smb2 lib
+   Copyright (C) Volker Lendecke 2011
+
+   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 "system/network.h"
+#include "lib/util/tevent_ntstatus.h"
+#include "smb_common.h"
+#include "smbXcli_base.h"
+
+struct smb2cli_read_state {
+	uint8_t fixed[48];
+	uint8_t dyn_pad[1];
+	struct iovec *recv_iov;
+	uint8_t *data;
+	uint32_t data_length;
+};
+
+static void smb2cli_read_done(struct tevent_req *subreq);
+
+struct tevent_req *smb2cli_read_send(TALLOC_CTX *mem_ctx,
+				     struct tevent_context *ev,
+				     struct smbXcli_conn *conn,
+				     uint32_t timeout_msec,
+				     struct smbXcli_session *session,
+				     uint32_t tcon_id,
+				     uint32_t length,
+				     uint64_t offset,
+				     uint64_t fid_persistent,
+				     uint64_t fid_volatile,
+				     uint64_t minimum_count,
+				     uint64_t remaining_bytes)
+{
+	struct tevent_req *req, *subreq;
+	struct smb2cli_read_state *state;
+	uint8_t *fixed;
+
+	req = tevent_req_create(mem_ctx, &state,
+				struct smb2cli_read_state);
+	if (req == NULL) {
+		return NULL;
+	}
+
+	fixed = state->fixed;
+
+	SSVAL(fixed, 0, 49);
+	SIVAL(fixed, 4, length);
+	SBVAL(fixed, 8, offset);
+	SBVAL(fixed, 16, fid_persistent);
+	SBVAL(fixed, 24, fid_volatile);
+	SBVAL(fixed, 32, minimum_count);
+	SBVAL(fixed, 40, remaining_bytes);
+
+	subreq = smb2cli_req_send(state, ev, conn, SMB2_OP_READ,
+				  0, 0, /* flags */
+				  timeout_msec,
+				  0xFEFF, /* pid */
+				  tcon_id,
+				  session,
+				  state->fixed, sizeof(state->fixed),
+				  state->dyn_pad, sizeof(state->dyn_pad));
+	if (tevent_req_nomem(subreq, req)) {
+		return tevent_req_post(req, ev);
+	}
+	tevent_req_set_callback(subreq, smb2cli_read_done, req);
+	return req;
+}
+
+static void smb2cli_read_done(struct tevent_req *subreq)
+{
+	struct tevent_req *req = tevent_req_callback_data(
+		subreq, struct tevent_req);
+	struct smb2cli_read_state *state =
+		tevent_req_data(req,
+		struct smb2cli_read_state);
+	NTSTATUS status;
+	struct iovec *iov;
+	uint8_t data_offset;
+	static const struct smb2cli_req_expected_response expected[] = {
+	{
+		.status = STATUS_BUFFER_OVERFLOW,
+		.body_size = 0x11
+	},
+	{
+		.status = NT_STATUS_OK,
+		.body_size = 0x11
+	}
+	};
+
+	status = smb2cli_req_recv(subreq, state, &iov,
+				  expected, ARRAY_SIZE(expected));
+	if (tevent_req_nterror(req, status)) {
+		return;
+	}
+
+	data_offset = CVAL(iov[1].iov_base, 2);
+	state->data_length = IVAL(iov[1].iov_base, 4);
+
+	if ((data_offset != SMB2_HDR_BODY + 16) ||
+	    (state->data_length > iov[2].iov_len)) {
+		tevent_req_nterror(req, NT_STATUS_INVALID_NETWORK_RESPONSE);
+		return;
+	}
+
+	state->recv_iov = iov;
+	state->data = (uint8_t *)iov[2].iov_base;
+	tevent_req_done(req);
+}
+
+NTSTATUS smb2cli_read_recv(struct tevent_req *req, TALLOC_CTX *mem_ctx,
+			   uint8_t **data, uint32_t *data_length)
+{
+	struct smb2cli_read_state *state =
+		tevent_req_data(req,
+		struct smb2cli_read_state);
+	NTSTATUS status;
+
+	if (tevent_req_is_nterror(req, &status)) {
+		return status;
+	}
+	talloc_steal(mem_ctx, state->recv_iov);
+	*data_length = state->data_length;
+	*data = state->data;
+	return NT_STATUS_OK;
+}
+
+NTSTATUS smb2cli_read(struct smbXcli_conn *conn,
+		      uint32_t timeout_msec,
+		      struct smbXcli_session *session,
+		      uint32_t tcon_id,
+		      uint32_t length,
+		      uint64_t offset,
+		      uint64_t fid_persistent,
+		      uint64_t fid_volatile,
+		      uint64_t minimum_count,
+		      uint64_t remaining_bytes,
+		      TALLOC_CTX *mem_ctx,
+		      uint8_t **data,
+		      uint32_t *data_length)
+{
+	TALLOC_CTX *frame = talloc_stackframe();
+	struct tevent_context *ev;
+	struct tevent_req *req;
+	NTSTATUS status = NT_STATUS_NO_MEMORY;
+
+	if (smbXcli_conn_has_async_calls(conn)) {
+		/*
+		 * Can't use sync call while an async call is in flight
+		 */
+		status = NT_STATUS_INVALID_PARAMETER;
+		goto fail;
+	}
+	ev = tevent_context_init(frame);
+	if (ev == NULL) {
+		goto fail;
+	}
+	req = smb2cli_read_send(frame, ev,
+				conn, timeout_msec, session, tcon_id,
+				length, offset,
+				fid_persistent, fid_volatile,
+				minimum_count, remaining_bytes);
+	if (req == NULL) {
+		goto fail;
+	}
+	if (!tevent_req_poll_ntstatus(req, ev, &status)) {
+		goto fail;
+	}
+	status = smb2cli_read_recv(req, mem_ctx, data, data_length);
+ fail:
+	TALLOC_FREE(frame);
+	return status;
+}
diff --git a/libcli/smb/smbXcli_base.h b/libcli/smb/smbXcli_base.h
index baac22c5557..3d1f3938775 100644
--- a/libcli/smb/smbXcli_base.h
+++ b/libcli/smb/smbXcli_base.h
@@ -343,4 +343,32 @@ NTSTATUS smb2cli_close(struct smbXcli_conn *conn,
 		       uint64_t fid_persistent,
 		       uint64_t fid_volatile);
 
+struct tevent_req *smb2cli_read_send(TALLOC_CTX *mem_ctx,
+				     struct tevent_context *ev,
+				     struct smbXcli_conn *conn,
+				     uint32_t timeout_msec,
+				     struct smbXcli_session *session,
+				     uint32_t tcon_id,
+				     uint32_t length,
+				     uint64_t offset,
+				     uint64_t fid_persistent,
+				     uint64_t fid_volatile,
+				     uint64_t minimum_count,
+				     uint64_t remaining_bytes);
+NTSTATUS smb2cli_read_recv(struct tevent_req *req, TALLOC_CTX *mem_ctx,
+			   uint8_t **data, uint32_t *data_length);
+NTSTATUS smb2cli_read(struct smbXcli_conn *conn,
+		      uint32_t timeout_msec,
+		      struct smbXcli_session *session,
+		      uint32_t tcon_id,
+		      uint32_t length,
+		      uint64_t offset,
+		      uint64_t fid_persistent,
+		      uint64_t fid_volatile,
+		      uint64_t minimum_count,
+		      uint64_t remaining_bytes,
+		      TALLOC_CTX *mem_ctx,
+		      uint8_t **data,
+		      uint32_t *data_length);
+
 #endif /* _SMBXCLI_BASE_H_ */
diff --git a/libcli/smb/wscript_build b/libcli/smb/wscript_build
index 904e8958789..69f9f032ae2 100755
--- a/libcli/smb/wscript_build
+++ b/libcli/smb/wscript_build
@@ -11,6 +11,7 @@ bld.SAMBA_LIBRARY('cli_smb_common',
 		smb2cli_session.c
                 smb2cli_create.c
                 smb2cli_close.c
+		smb2cli_read.c
 	''',
 	deps='LIBCRYPTO errors gensec krb5samba LIBASYNC_REQ',
 	public_deps='talloc samba-util',