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/*
Unix SMB/CIFS implementation.
SMB2 client read call
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 2 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, write to the Free Software
Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
#include "includes.h"
#include "libcli/raw/libcliraw.h"
#include "libcli/smb2/smb2.h"
#include "libcli/smb2/smb2_calls.h"
/*
send a read request
*/
struct smb2_request *smb2_read_send(struct smb2_tree *tree, struct smb2_read *io)
{
struct smb2_request *req;
req = smb2_request_init_tree(tree, SMB2_OP_READ, 0x31);
if (req == NULL) return NULL;
SSVAL(req->out.body, 0x00, io->in.buffer_code);
SSVAL(req->out.body, 0x02, 0);
SIVAL(req->out.body, 0x04, io->in.length);
SBVAL(req->out.body, 0x08, io->in.offset);
smb2_put_handle(req->out.body+0x10, &io->in.handle);
memcpy(req->out.body+0x20, io->in._pad, 17);
smb2_transport_send(req);
return req;
}
/*
recv a read reply
*/
NTSTATUS smb2_read_recv(struct smb2_request *req,
TALLOC_CTX *mem_ctx, struct smb2_read *io)
{
uint16_t ofs;
uint32_t nread;
if (!smb2_request_receive(req) ||
smb2_request_is_error(req)) {
return smb2_request_destroy(req);
}
if (req->in.body_size < 16) {
return NT_STATUS_BUFFER_TOO_SMALL;
}
SMB2_CHECK_BUFFER_CODE(req, 0x11);
ofs = SVAL(req->in.body, 0x02);
nread = IVAL(req->in.body, 0x04);
memcpy(io->out.unknown, req->in.body+0x08, 8);
if (smb2_oob_in(req, req->in.hdr+ofs, nread)) {
return NT_STATUS_BUFFER_TOO_SMALL;
}
io->out.data = data_blob_talloc(mem_ctx, req->in.hdr+ofs, nread);
if (io->out.data.data == NULL) {
return NT_STATUS_NO_MEMORY;
}
return smb2_request_destroy(req);
}
/*
sync read request
*/
NTSTATUS smb2_read(struct smb2_tree *tree, TALLOC_CTX *mem_ctx, struct smb2_read *io)
{
struct smb2_request *req = smb2_read_send(tree, io);
return smb2_read_recv(req, mem_ctx, io);
}
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