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/*
Unix SMB/CIFS implementation.
SMB2 client library header
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/>.
*/
#ifndef __LIBCLI_SMB2_SMB2_H__
#define __LIBCLI_SMB2_SMB2_H__
#include "libcli/raw/request.h"
#include "libcli/raw/libcliraw.h"
struct smb2_handle;
struct smb2_lease_break;
/*
information returned from the negotiate process
*/
struct smb2_negotiate {
DATA_BLOB secblob;
NTTIME system_time;
NTTIME server_start_time;
uint16_t security_mode;
uint16_t dialect_revision;
};
struct smb2_request_buffer {
/* the raw SMB2 buffer, including the 4 byte length header */
uint8_t *buffer;
/* the size of the raw buffer, including 4 byte header */
size_t size;
/* how much has been allocated - on reply the buffer is over-allocated to
prevent too many realloc() calls
*/
size_t allocated;
/* the start of the SMB2 header - this is always buffer+4 */
uint8_t *hdr;
/* the packet body */
uint8_t *body;
size_t body_fixed;
size_t body_size;
/* this point to the next dynamic byte that can be used
* this will be moved when some dynamic data is pushed
*/
uint8_t *dynamic;
/* this is used to range check and align strings and buffers */
struct request_bufinfo bufinfo;
};
/* this is the context for the smb2 transport layer */
struct smb2_transport {
/* socket level info */
struct smbcli_socket *socket;
struct smb2_negotiate negotiate;
/* next seqnum to allocate */
uint64_t seqnum;
/* the details for coumpounded requests */
struct {
uint32_t missing;
bool related;
struct smb2_request_buffer buffer;
} compound;
struct {
uint16_t charge;
uint16_t ask_num;
} credits;
/* a list of requests that are pending for receive on this
connection */
struct smb2_request *pending_recv;
/* context of the stream -> packet parser */
struct packet_context *packet;
/* an idle function - if this is defined then it will be
called once every period microseconds while we are waiting
for a packet */
struct {
void (*func)(struct smb2_transport *, void *);
void *private_data;
uint_t period;
} idle;
struct {
/* a oplock break request handler */
bool (*handler)(struct smb2_transport *transport,
const struct smb2_handle *handle,
uint8_t level, void *private_data);
/* private data passed to the oplock handler */
void *private_data;
} oplock;
struct {
/* a lease break request handler */
bool (*handler)(struct smb2_transport *transport,
const struct smb2_lease_break *lease_break,
void *private_data);
/* private data passed to the oplock handler */
void *private_data;
} lease;
struct smbcli_options options;
bool signing_required;
};
/*
SMB2 tree context
*/
struct smb2_tree {
struct smb2_session *session;
uint32_t tid;
};
/*
SMB2 session context
*/
struct smb2_session {
struct smb2_transport *transport;
struct gensec_security *gensec;
uint64_t uid;
uint32_t pid;
DATA_BLOB session_key;
bool signing_active;
};
/*
a client request moves between the following 4 states.
*/
enum smb2_request_state {SMB2_REQUEST_INIT, /* we are creating the request */
SMB2_REQUEST_RECV, /* we are waiting for a matching reply */
SMB2_REQUEST_DONE, /* the request is finished */
SMB2_REQUEST_ERROR}; /* a packet or transport level error has occurred */
/* the context for a single SMB2 request */
struct smb2_request {
/* allow a request to be part of a list of requests */
struct smb2_request *next, *prev;
/* each request is in one of 3 possible states */
enum smb2_request_state state;
struct smb2_transport *transport;
struct smb2_session *session;
struct smb2_tree *tree;
uint64_t seqnum;
struct {
bool do_cancel;
bool can_cancel;
uint32_t pending_id;
} cancel;
/* the NT status for this request. Set by packet receive code
or code detecting error. */
NTSTATUS status;
struct smb2_request_buffer in;
struct smb2_request_buffer out;
/* information on what to do with a reply when it is received
asyncronously. If this is not setup when a reply is received then
the reply is discarded
The private pointer is private to the caller of the client
library (the application), not private to the library
*/
struct {
void (*fn)(struct smb2_request *);
void *private_data;
} async;
};
#define SMB2_MIN_SIZE 0x42
#define SMB2_MIN_SIZE_NO_BODY 0x40
/*
check that a body has the expected size
*/
#define SMB2_CHECK_PACKET_RECV(req, size, dynamic) do { \
size_t is_size = req->in.body_size; \
uint16_t field_size = SVAL(req->in.body, 0); \
uint16_t want_size = ((dynamic)?(size)+1:(size)); \
if (is_size < (size)) { \
DEBUG(0,("%s: buffer too small 0x%x. Expected 0x%x\n", \
__location__, (unsigned)is_size, (unsigned)want_size)); \
return NT_STATUS_BUFFER_TOO_SMALL; \
}\
if (field_size != want_size) { \
DEBUG(0,("%s: unexpected fixed body size 0x%x. Expected 0x%x\n", \
__location__, (unsigned)field_size, (unsigned)want_size)); \
return NT_STATUS_INVALID_PARAMETER; \
} \
} while (0)
#endif
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