Adding upstream version 2:4.17.12+dfsg.upstream/2%4.17.12+dfsgupstream

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

1 files changed, 288 insertions, 0 deletions

diff --git a/source4/libcli/smb_composite/savefile.c b/source4/libcli/smb_composite/savefile.c
new file mode 100644
index 0000000..2f00443
--- /dev/null
+++ b/source4/libcli/smb_composite/savefile.c
@@ -0,0 +1,288 @@
+/* 
+   Unix SMB/CIFS implementation.
+
+   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/>.
+*/
+/*
+  a composite API for saving a whole file from memory
+*/
+
+#include "includes.h"
+#include "libcli/raw/libcliraw.h"
+#include "libcli/raw/raw_proto.h"
+#include "libcli/composite/composite.h"
+#include "libcli/smb_composite/smb_composite.h"
+
+/* the stages of this call */
+enum savefile_stage {SAVEFILE_OPEN, SAVEFILE_WRITE, SAVEFILE_CLOSE};
+
+static void savefile_handler(struct smbcli_request *req);
+
+struct savefile_state {
+	enum savefile_stage stage;
+	off_t total_written;
+	struct smb_composite_savefile *io;
+	union smb_open *io_open;
+	union smb_write *io_write;
+	struct smbcli_request *req;
+};
+
+
+/*
+  setup for the close
+*/
+static NTSTATUS setup_close(struct composite_context *c, 
+			    struct smbcli_tree *tree, uint16_t fnum)
+{
+	struct savefile_state *state = talloc_get_type(c->private_data, struct savefile_state);
+	union smb_close *io_close;
+
+	/* nothing to write, setup the close */
+	io_close = talloc(c, union smb_close);
+	NT_STATUS_HAVE_NO_MEMORY(io_close);
+	
+	io_close->close.level = RAW_CLOSE_CLOSE;
+	io_close->close.in.file.fnum = fnum;
+	io_close->close.in.write_time = 0;
+
+	state->req = smb_raw_close_send(tree, io_close);
+	NT_STATUS_HAVE_NO_MEMORY(state->req);
+
+	/* call the handler again when the close is done */
+	state->stage = SAVEFILE_CLOSE;
+	state->req->async.fn = savefile_handler;
+	state->req->async.private_data = c;
+
+	return NT_STATUS_OK;
+}
+
+/*
+  called when the open is done - pull the results and setup for the
+  first writex, or close if the file is zero size
+*/
+static NTSTATUS savefile_open(struct composite_context *c, 
+			      struct smb_composite_savefile *io)
+{
+	struct savefile_state *state = talloc_get_type(c->private_data, struct savefile_state);
+	union smb_write *io_write;
+	struct smbcli_tree *tree = state->req->tree;
+	NTSTATUS status;
+	uint32_t max_xmit = tree->session->transport->negotiate.max_xmit;
+
+	status = smb_raw_open_recv(state->req, c, state->io_open);
+	NT_STATUS_NOT_OK_RETURN(status);
+	
+	if (io->in.size == 0) {
+		return setup_close(c, tree, state->io_open->ntcreatex.out.file.fnum);
+	}
+
+	/* setup for the first write */
+	io_write = talloc(c, union smb_write);
+	NT_STATUS_HAVE_NO_MEMORY(io_write);
+	
+	io_write->writex.level        = RAW_WRITE_WRITEX;
+	io_write->writex.in.file.fnum = state->io_open->ntcreatex.out.file.fnum;
+	io_write->writex.in.offset    = 0;
+	io_write->writex.in.wmode     = 0;
+	io_write->writex.in.remaining = 0;
+	io_write->writex.in.count     = MIN(max_xmit - 100, io->in.size);
+	io_write->writex.in.data      = io->in.data;
+	state->io_write = io_write;
+
+	state->req = smb_raw_write_send(tree, io_write);
+	NT_STATUS_HAVE_NO_MEMORY(state->req);
+
+	/* call the handler again when the first write is done */
+	state->stage = SAVEFILE_WRITE;
+	state->req->async.fn = savefile_handler;
+	state->req->async.private_data = c;
+	talloc_free(state->io_open);
+
+	return NT_STATUS_OK;
+}
+
+
+/*
+  called when a write is done - pull the results and setup for the
+  next write, or close if the file is all done
+*/
+static NTSTATUS savefile_write(struct composite_context *c, 
+			      struct smb_composite_savefile *io)
+{
+	struct savefile_state *state = talloc_get_type(c->private_data, struct savefile_state);
+	struct smbcli_tree *tree = state->req->tree;
+	NTSTATUS status;
+	uint32_t max_xmit = tree->session->transport->negotiate.max_xmit;
+
+	status = smb_raw_write_recv(state->req, state->io_write);
+	NT_STATUS_NOT_OK_RETURN(status);
+
+	state->total_written += state->io_write->writex.out.nwritten;
+	
+	/* we might be done */
+	if (state->io_write->writex.out.nwritten != state->io_write->writex.in.count ||
+	    state->total_written == io->in.size) {
+		return setup_close(c, tree, state->io_write->writex.in.file.fnum);
+	}
+
+	/* setup for the next write */
+	state->io_write->writex.in.offset = state->total_written;
+	state->io_write->writex.in.count = MIN(max_xmit - 100, 
+					       io->in.size - state->total_written);
+	state->io_write->writex.in.data = io->in.data + state->total_written;
+
+	state->req = smb_raw_write_send(tree, state->io_write);
+	NT_STATUS_HAVE_NO_MEMORY(state->req);
+
+	/* call the handler again when the write is done */
+	state->req->async.fn = savefile_handler;
+	state->req->async.private_data = c;
+
+	return NT_STATUS_OK;
+}
+
+/*
+  called when the close is done, check the status and cleanup
+*/
+static NTSTATUS savefile_close(struct composite_context *c, 
+			       struct smb_composite_savefile *io)
+{
+	struct savefile_state *state = talloc_get_type(c->private_data, struct savefile_state);
+	NTSTATUS status;
+
+	status = smbcli_request_simple_recv(state->req);
+	NT_STATUS_NOT_OK_RETURN(status);
+
+	if (state->total_written != io->in.size) {
+		return NT_STATUS_DISK_FULL;
+	}
+	
+	c->state = COMPOSITE_STATE_DONE;
+
+	return NT_STATUS_OK;
+}
+						     
+
+/*
+  handler for completion of a sub-request in savefile
+*/
+static void savefile_handler(struct smbcli_request *req)
+{
+	struct composite_context *c = (struct composite_context *)req->async.private_data;
+	struct savefile_state *state = talloc_get_type(c->private_data, struct savefile_state);
+
+	/* when this handler is called, the stage indicates what
+	   call has just finished */
+	switch (state->stage) {
+	case SAVEFILE_OPEN:
+		c->status = savefile_open(c, state->io);
+		break;
+
+	case SAVEFILE_WRITE:
+		c->status = savefile_write(c, state->io);
+		break;
+
+	case SAVEFILE_CLOSE:
+		c->status = savefile_close(c, state->io);
+		break;
+	}
+
+	if (!NT_STATUS_IS_OK(c->status)) {
+		c->state = COMPOSITE_STATE_ERROR;
+	}
+
+	if (c->state >= COMPOSITE_STATE_DONE &&
+	    c->async.fn) {
+		c->async.fn(c);
+	}
+}
+
+/*
+  composite savefile call - does an openx followed by a number of writex calls,
+  followed by a close
+*/
+struct composite_context *smb_composite_savefile_send(struct smbcli_tree *tree, 
+						      struct smb_composite_savefile *io)
+{
+	struct composite_context *c;
+	struct savefile_state *state;
+	union smb_open *io_open;
+
+	c = talloc_zero(tree, struct composite_context);
+	if (c == NULL) goto failed;
+
+	c->state = COMPOSITE_STATE_IN_PROGRESS;
+	c->event_ctx = tree->session->transport->ev;
+
+	state = talloc(c, struct savefile_state);
+	if (state == NULL) goto failed;
+
+	state->stage = SAVEFILE_OPEN;
+	state->total_written = 0;
+	state->io = io;
+
+	/* setup for the open */
+	io_open = talloc_zero(c, union smb_open);
+	if (io_open == NULL) goto failed;
+	
+	io_open->ntcreatex.level               = RAW_OPEN_NTCREATEX;
+	io_open->ntcreatex.in.flags            = NTCREATEX_FLAGS_EXTENDED;
+	io_open->ntcreatex.in.access_mask      = SEC_FILE_WRITE_DATA;
+	io_open->ntcreatex.in.file_attr        = FILE_ATTRIBUTE_NORMAL;
+	io_open->ntcreatex.in.share_access     = NTCREATEX_SHARE_ACCESS_READ | NTCREATEX_SHARE_ACCESS_WRITE;
+	io_open->ntcreatex.in.open_disposition = NTCREATEX_DISP_OPEN_IF;
+	io_open->ntcreatex.in.impersonation    = NTCREATEX_IMPERSONATION_ANONYMOUS;
+	io_open->ntcreatex.in.fname            = io->in.fname;
+	state->io_open = io_open;
+
+	/* send the open on its way */
+	state->req = smb_raw_open_send(tree, io_open);
+	if (state->req == NULL) goto failed;
+
+	/* setup the callback handler */
+	state->req->async.fn = savefile_handler;
+	state->req->async.private_data = c;
+	c->private_data = state;
+
+	return c;
+
+failed:
+	talloc_free(c);
+	return NULL;
+}
+
+
+/*
+  composite savefile call - recv side
+*/
+NTSTATUS smb_composite_savefile_recv(struct composite_context *c)
+{
+	NTSTATUS status;
+	status = composite_wait(c);
+	talloc_free(c);
+	return status;
+}
+
+
+/*
+  composite savefile call - sync interface
+*/
+NTSTATUS smb_composite_savefile(struct smbcli_tree *tree, 
+				struct smb_composite_savefile *io)
+{
+	struct composite_context *c = smb_composite_savefile_send(tree, io);
+	return smb_composite_savefile_recv(c);
+}