--- /dev/null
+/*
+ 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 NTSTATUS smbd_smb2_read(struct smbd_smb2_request *req,
+ uint32_t in_smbpid,
+ uint64_t in_file_id_volatile,
+ uint32_t in_length,
+ uint64_t in_offset,
+ uint32_t in_minimum,
+ uint32_t in_remaining,
+ DATA_BLOB *out_data_buffer,
+ uint32_t *out_remaining);
+
+NTSTATUS smbd_smb2_request_process_read(struct smbd_smb2_request *req)
+{
+ const uint8_t *inhdr;
+ const uint8_t *inbody;
+ int i = req->current_idx;
+ uint8_t *outhdr;
+ DATA_BLOB outbody;
+ DATA_BLOB outdyn;
+ size_t expected_body_size = 0x31;
+ size_t body_size;
+ uint32_t in_smbpid;
+ uint32_t in_length;
+ uint64_t in_offset;
+ uint64_t in_file_id_persistent;
+ uint64_t in_file_id_volatile;
+ uint32_t in_minimum_count;
+ uint32_t in_remaining_bytes;
+ uint8_t out_data_offset;
+ DATA_BLOB out_data_buffer;
+ uint32_t out_data_remaining;
+ NTSTATUS status;
+
+ 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_smbpid = IVAL(inhdr, SMB2_HDR_PID);
+
+ in_length = IVAL(inbody, 0x04);
+ in_offset = BVAL(inbody, 0x08);
+ in_file_id_persistent = BVAL(inbody, 0x10);
+ in_file_id_volatile = BVAL(inbody, 0x18);
+ in_minimum_count = IVAL(inbody, 0x20);
+ in_remaining_bytes = IVAL(inbody, 0x28);
+
+ /* check the max read size */
+ if (in_length > 0x00010000) {
+ DEBUG(0,("here:%s: 0x%08X: 0x%08X\n",
+ __location__, in_length, 0x00010000));
+ return smbd_smb2_request_error(req, NT_STATUS_INVALID_PARAMETER);
+ }
+
+ if (in_file_id_persistent != 0) {
+ return smbd_smb2_request_error(req, NT_STATUS_FILE_CLOSED);
+ }
+
+ status = smbd_smb2_read(req,
+ in_smbpid,
+ in_file_id_volatile,
+ in_length,
+ in_offset,
+ in_minimum_count,
+ in_remaining_bytes,
+ &out_data_buffer,
+ &out_data_remaining);
+ if (!NT_STATUS_IS_OK(status)) {
+ return smbd_smb2_request_error(req, status);
+ }
+
+ out_data_offset = SMB2_HDR_BODY + 0x10;
+
+ outhdr = (uint8_t *)req->out.vector[i].iov_base;
+
+ outbody = data_blob_talloc(req->out.vector, NULL, 0x10);
+ if (outbody.data == NULL) {
+ return smbd_smb2_request_error(req, NT_STATUS_NO_MEMORY);
+ }
+
+ SSVAL(outbody.data, 0x00, 0x10 + 1); /* struct size */
+ SCVAL(outbody.data, 0x02,
+ out_data_offset); /* data offset */
+ SCVAL(outbody.data, 0x03, 0); /* reserved */
+ SIVAL(outbody.data, 0x04,
+ out_data_buffer.length); /* data length */
+ SIVAL(outbody.data, 0x08,
+ out_data_remaining); /* data remaining */
+ SIVAL(outbody.data, 0x0C, 0); /* reserved */
+
+ outdyn = out_data_buffer;
+
+ return smbd_smb2_request_done(req, outbody, &outdyn);
+}
+
+static NTSTATUS smbd_smb2_read(struct smbd_smb2_request *req,
+ uint32_t in_smbpid,
+ uint64_t in_file_id_volatile,
+ uint32_t in_length,
+ uint64_t in_offset,
+ uint32_t in_minimum,
+ uint32_t in_remaining,
+ DATA_BLOB *out_data_buffer,
+ uint32_t *out_remaining)
+{
+ struct smb_request *smbreq;
+ connection_struct *conn = req->tcon->compat_conn;
+ files_struct *fsp;
+ ssize_t nread = -1;
+ struct lock_struct lock;
+
+ DEBUG(10,("smbd_smb2_read: file_id[0x%016llX]\n",
+ (unsigned long long)in_file_id_volatile));
+
+ smbreq = smbd_smb2_fake_smb_request(req);
+ if (smbreq == NULL) {
+ return NT_STATUS_NO_MEMORY;
+ }
+
+ /* If it's an IPC, pass off the pipe handler. */
+ if (IS_IPC(conn)) {
+ return NT_STATUS_NOT_IMPLEMENTED;
+ }
+
+ fsp = file_fsp(smbreq, (uint16_t)in_file_id_volatile);
+ if (fsp == NULL) {
+ return NT_STATUS_FILE_CLOSED;
+ }
+ if (conn != fsp->conn) {
+ return NT_STATUS_FILE_CLOSED;
+ }
+ if (req->session->vuid != fsp->vuid) {
+ return NT_STATUS_FILE_CLOSED;
+ }
+
+ if (!CHECK_READ(fsp, smbreq)) {
+ return NT_STATUS_ACCESS_DENIED;
+ }
+
+ *out_data_buffer = data_blob_talloc(req, NULL, in_length);
+ if (in_length > 0 && out_data_buffer->data == NULL) {
+ return NT_STATUS_NO_MEMORY;
+ }
+
+ init_strict_lock_struct(fsp,
+ in_smbpid,
+ in_offset,
+ in_length,
+ READ_LOCK,
+ &lock);
+
+ if (!SMB_VFS_STRICT_LOCK(conn, fsp, &lock)) {
+ return NT_STATUS_FILE_LOCK_CONFLICT;
+ }
+
+ nread = read_file(fsp,
+ (char *)out_data_buffer->data,
+ in_offset,
+ in_length);
+
+ SMB_VFS_STRICT_UNLOCK(conn, fsp, &lock);
+
+ if (nread < 0) {
+ DEBUG(5,("smbd_smb2_read: read_file[%s] nread[%lld]\n",
+ fsp->fsp_name, (long long)nread));
+ return NT_STATUS_ACCESS_DENIED;
+ }
+ if (nread == 0 && in_length != 0) {
+ DEBUG(5,("smbd_smb2_read: read_file[%s] end of file\n",
+ fsp->fsp_name));
+ return NT_STATUS_END_OF_FILE;
+ }
+
+ out_data_buffer->length = nread;
+ *out_remaining = 0;
+ return NT_STATUS_OK;
+}
git.samba.org / ab / samba.git / .git / commitdiff