1 files changed, 293 insertions, 0 deletions
diff --git a/source4/libcli/smb_composite/loadfile.c b/source4/libcli/smb_composite/loadfile.c
new file mode 100644
index 0000000..00456f1
--- /dev/null
+++ b/source4/libcli/smb_composite/loadfile.c
@@ -0,0 +1,293 @@
+/* 
+   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 loading a whole file into memory
+*/
+
+#include "includes.h"
+#include "libcli/raw/libcliraw.h"
+#include "libcli/composite/composite.h"
+#include "libcli/smb_composite/smb_composite.h"
+
+/* the stages of this call */
+enum loadfile_stage {LOADFILE_OPEN, LOADFILE_READ, LOADFILE_CLOSE};
+
+
+static void loadfile_handler(struct smbcli_request *req);
+
+struct loadfile_state {
+	enum loadfile_stage stage;
+	struct smb_composite_loadfile *io;
+	struct smbcli_request *req;
+	union smb_open *io_open;
+	union smb_read *io_read;
+};
+
+/*
+  setup for the close
+*/
+static NTSTATUS setup_close(struct composite_context *c, 
+			    struct smbcli_tree *tree, uint16_t fnum)
+{
+	struct loadfile_state *state = talloc_get_type(c->private_data, struct loadfile_state);
+	union smb_close *io_close;
+
+	/* nothing to read, 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->req->async.fn = loadfile_handler;
+	state->req->async.private_data = c;
+	state->stage = LOADFILE_CLOSE;
+
+	return NT_STATUS_OK;
+}
+
+/*
+  called when the open is done - pull the results and setup for the
+  first readx, or close if the file is zero size
+*/
+static NTSTATUS loadfile_open(struct composite_context *c, 
+			      struct smb_composite_loadfile *io)
+{
+	struct loadfile_state *state = talloc_get_type(c->private_data, struct loadfile_state);
+	struct smbcli_tree *tree = state->req->tree;
+	NTSTATUS status;
+
+	status = smb_raw_open_recv(state->req, c, state->io_open);
+	NT_STATUS_NOT_OK_RETURN(status);
+	
+	/* don't allow stupidly large loads */
+	if (state->io_open->ntcreatex.out.size > 100*1000*1000) {
+		return NT_STATUS_INSUFFICIENT_RESOURCES;
+	}
+
+	/* allocate space for the file data */
+	io->out.size = state->io_open->ntcreatex.out.size;
+	io->out.data = talloc_array(c, uint8_t, io->out.size);
+	NT_STATUS_HAVE_NO_MEMORY(io->out.data);
+
+	if (io->out.size == 0) {
+		return setup_close(c, tree, state->io_open->ntcreatex.out.file.fnum);
+	}
+
+	/* setup for the read */
+	state->io_read = talloc(c, union smb_read);
+	NT_STATUS_HAVE_NO_MEMORY(state->io_read);
+	
+	state->io_read->readx.level        = RAW_READ_READX;
+	state->io_read->readx.in.file.fnum = state->io_open->ntcreatex.out.file.fnum;
+	state->io_read->readx.in.offset    = 0;
+	state->io_read->readx.in.mincnt    = MIN(32768, io->out.size);
+	state->io_read->readx.in.maxcnt    = state->io_read->readx.in.mincnt;
+	state->io_read->readx.in.remaining = 0;
+	state->io_read->readx.in.read_for_execute = false;
+	state->io_read->readx.out.data     = io->out.data;
+
+	state->req = smb_raw_read_send(tree, state->io_read);
+	NT_STATUS_HAVE_NO_MEMORY(state->req);
+
+	/* call the handler again when the first read is done */
+	state->req->async.fn = loadfile_handler;
+	state->req->async.private_data = c;
+	state->stage = LOADFILE_READ;
+
+	talloc_free(state->io_open);
+
+	return NT_STATUS_OK;
+}
+
+
+/*
+  called when a read is done - pull the results and setup for the
+  next read, or close if the file is all done
+*/
+static NTSTATUS loadfile_read(struct composite_context *c, 
+			      struct smb_composite_loadfile *io)
+{
+	struct loadfile_state *state = talloc_get_type(c->private_data, struct loadfile_state);
+	struct smbcli_tree *tree = state->req->tree;
+	NTSTATUS status;
+
+	status = smb_raw_read_recv(state->req, state->io_read);
+	NT_STATUS_NOT_OK_RETURN(status);
+	
+	/* we might be done */
+	if (state->io_read->readx.in.offset +
+	    state->io_read->readx.out.nread == io->out.size) {
+		return setup_close(c, tree, state->io_read->readx.in.file.fnum);
+	}
+
+	/* setup for the next read */
+	state->io_read->readx.in.offset += state->io_read->readx.out.nread;
+	state->io_read->readx.in.mincnt = MIN(32768, io->out.size - state->io_read->readx.in.offset);
+	state->io_read->readx.out.data = io->out.data + state->io_read->readx.in.offset;
+
+	state->req = smb_raw_read_send(tree, state->io_read);
+	NT_STATUS_HAVE_NO_MEMORY(state->req);
+
+	/* call the handler again when the read is done */
+	state->req->async.fn = loadfile_handler;
+	state->req->async.private_data = c;
+
+	return NT_STATUS_OK;
+}
+
+/*
+  called when the close is done, check the status and cleanup
+*/
+static NTSTATUS loadfile_close(struct composite_context *c, 
+			       struct smb_composite_loadfile *io)
+{
+	struct loadfile_state *state = talloc_get_type(c->private_data, struct loadfile_state);
+	NTSTATUS status;
+
+	status = smbcli_request_simple_recv(state->req);
+	NT_STATUS_NOT_OK_RETURN(status);
+	
+	c->state = COMPOSITE_STATE_DONE;
+
+	return NT_STATUS_OK;
+}
+						     
+
+/*
+  handler for completion of a sub-request in loadfile
+*/
+static void loadfile_handler(struct smbcli_request *req)
+{
+	struct composite_context *c = (struct composite_context *)req->async.private_data;
+	struct loadfile_state *state = talloc_get_type(c->private_data, struct loadfile_state);
+
+	/* when this handler is called, the stage indicates what
+	   call has just finished */
+	switch (state->stage) {
+	case LOADFILE_OPEN:
+		c->status = loadfile_open(c, state->io);
+		break;
+
+	case LOADFILE_READ:
+		c->status = loadfile_read(c, state->io);
+		break;
+
+	case LOADFILE_CLOSE:
+		c->status = loadfile_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 loadfile call - does an openx followed by a number of readx calls,
+  followed by a close
+*/
+struct composite_context *smb_composite_loadfile_send(struct smbcli_tree *tree, 
+						     struct smb_composite_loadfile *io)
+{
+	struct composite_context *c;
+	struct loadfile_state *state;
+
+	c = talloc_zero(tree, struct composite_context);
+	if (c == NULL) goto failed;
+
+	state = talloc(c, struct loadfile_state);
+	if (state == NULL) goto failed;
+
+	state->io = io;
+
+	c->private_data = state;
+	c->state = COMPOSITE_STATE_IN_PROGRESS;
+	c->event_ctx = tree->session->transport->ev;
+
+	/* setup for the open */
+	state->io_open = talloc_zero(c, union smb_open);
+	if (state->io_open == NULL) goto failed;
+	
+	state->io_open->ntcreatex.level               = RAW_OPEN_NTCREATEX;
+	state->io_open->ntcreatex.in.flags            = NTCREATEX_FLAGS_EXTENDED;
+	state->io_open->ntcreatex.in.access_mask      = SEC_FILE_READ_DATA;
+	state->io_open->ntcreatex.in.file_attr        = FILE_ATTRIBUTE_NORMAL;
+	state->io_open->ntcreatex.in.share_access     = NTCREATEX_SHARE_ACCESS_READ | NTCREATEX_SHARE_ACCESS_WRITE;
+	state->io_open->ntcreatex.in.open_disposition = NTCREATEX_DISP_OPEN;
+	state->io_open->ntcreatex.in.impersonation    = NTCREATEX_IMPERSONATION_ANONYMOUS;
+	state->io_open->ntcreatex.in.fname            = io->in.fname;
+
+	/* send the open on its way */
+	state->req = smb_raw_open_send(tree, state->io_open);
+	if (state->req == NULL) goto failed;
+
+	/* setup the callback handler */
+	state->req->async.fn = loadfile_handler;
+	state->req->async.private_data = c;
+	state->stage = LOADFILE_OPEN;
+
+	return c;
+
+failed:
+	talloc_free(c);
+	return NULL;
+}
+
+
+/*
+  composite loadfile call - recv side
+*/
+NTSTATUS smb_composite_loadfile_recv(struct composite_context *c, TALLOC_CTX *mem_ctx)
+{
+	NTSTATUS status;
+
+	status = composite_wait(c);
+
+	if (NT_STATUS_IS_OK(status)) {
+		struct loadfile_state *state = talloc_get_type(c->private_data, struct loadfile_state);
+		talloc_steal(mem_ctx, state->io->out.data);
+	}
+
+	talloc_free(c);
+	return status;
+}
+
+
+/*
+  composite loadfile call - sync interface
+*/
+NTSTATUS smb_composite_loadfile(struct smbcli_tree *tree, 
+				TALLOC_CTX *mem_ctx,
+				struct smb_composite_loadfile *io)
+{
+	struct composite_context *c = smb_composite_loadfile_send(tree, io);
+	return smb_composite_loadfile_recv(c, mem_ctx);
+}
+