root/source4/libcli/smb2/smb2.h

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INCLUDED FROM


   1 /* 
   2    Unix SMB/CIFS implementation.
   3 
   4    SMB2 client library header
   5 
   6    Copyright (C) Andrew Tridgell 2005
   7    
   8    This program is free software; you can redistribute it and/or modify
   9    it under the terms of the GNU General Public License as published by
  10    the Free Software Foundation; either version 3 of the License, or
  11    (at your option) any later version.
  12    
  13    This program is distributed in the hope that it will be useful,
  14    but WITHOUT ANY WARRANTY; without even the implied warranty of
  15    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16    GNU General Public License for more details.
  17    
  18    You should have received a copy of the GNU General Public License
  19    along with this program.  If not, see <http://www.gnu.org/licenses/>.
  20 */
  21 
  22 #ifndef __LIBCLI_SMB2_SMB2_H__
  23 #define __LIBCLI_SMB2_SMB2_H__
  24 
  25 #include "libcli/raw/request.h"
  26 #include "libcli/raw/libcliraw.h"
  27 
  28 struct smb2_handle;
  29 
  30 /*
  31   information returned from the negotiate process
  32 */
  33 struct smb2_negotiate {
  34         DATA_BLOB secblob;
  35         NTTIME system_time;
  36         NTTIME server_start_time;
  37         uint16_t security_mode;
  38 };
  39 
  40 /* this is the context for the smb2 transport layer */
  41 struct smb2_transport {
  42         /* socket level info */
  43         struct smbcli_socket *socket;
  44 
  45         struct smb2_negotiate negotiate;
  46 
  47         /* next seqnum to allocate */
  48         uint64_t seqnum;
  49 
  50         /* a list of requests that are pending for receive on this
  51            connection */
  52         struct smb2_request *pending_recv;
  53 
  54         /* context of the stream -> packet parser */
  55         struct packet_context *packet;
  56 
  57         /* an idle function - if this is defined then it will be
  58            called once every period microseconds while we are waiting
  59            for a packet */
  60         struct {
  61                 void (*func)(struct smb2_transport *, void *);
  62                 void *private_data;
  63                 uint_t period;
  64         } idle;
  65 
  66         struct {
  67                 /* a oplock break request handler */
  68                 bool (*handler)(struct smb2_transport *transport,
  69                                 const struct smb2_handle *handle,
  70                                 uint8_t level, void *private_data);
  71                 /* private data passed to the oplock handler */
  72                 void *private_data;
  73         } oplock;
  74 
  75         struct smbcli_options options;
  76 
  77         bool signing_required;
  78 };
  79 
  80 
  81 /*
  82   SMB2 tree context
  83 */
  84 struct smb2_tree {
  85         struct smb2_session *session;
  86         uint32_t tid;
  87 };
  88 
  89 /*
  90   SMB2 session context
  91 */
  92 struct smb2_session {
  93         struct smb2_transport *transport;
  94         struct gensec_security *gensec;
  95         uint64_t uid;
  96         DATA_BLOB session_key;
  97         bool signing_active;
  98 };
  99 
 100 
 101 struct smb2_request_buffer {
 102         /* the raw SMB2 buffer, including the 4 byte length header */
 103         uint8_t *buffer;
 104         
 105         /* the size of the raw buffer, including 4 byte header */
 106         size_t size;
 107         
 108         /* how much has been allocated - on reply the buffer is over-allocated to 
 109            prevent too many realloc() calls 
 110         */
 111         size_t allocated;
 112         
 113         /* the start of the SMB2 header - this is always buffer+4 */
 114         uint8_t *hdr;
 115         
 116         /* the packet body */
 117         uint8_t *body;
 118         size_t body_fixed;
 119         size_t body_size;
 120 
 121         /* this point to the next dynamic byte that can be used
 122          * this will be moved when some dynamic data is pushed
 123          */
 124         uint8_t *dynamic;
 125 
 126         /* this is used to range check and align strings and buffers */
 127         struct request_bufinfo bufinfo;
 128 };
 129 
 130 
 131 /*
 132   a client request moves between the following 4 states.
 133 */
 134 enum smb2_request_state {SMB2_REQUEST_INIT, /* we are creating the request */
 135                         SMB2_REQUEST_RECV, /* we are waiting for a matching reply */
 136                         SMB2_REQUEST_DONE, /* the request is finished */
 137                         SMB2_REQUEST_ERROR}; /* a packet or transport level error has occurred */
 138 
 139 /* the context for a single SMB2 request */
 140 struct smb2_request {
 141         /* allow a request to be part of a list of requests */
 142         struct smb2_request *next, *prev;
 143 
 144         /* each request is in one of 3 possible states */
 145         enum smb2_request_state state;
 146         
 147         struct smb2_transport *transport;
 148         struct smb2_session   *session;
 149         struct smb2_tree      *tree;
 150 
 151         uint64_t seqnum;
 152 
 153         struct {
 154                 bool do_cancel;
 155                 bool can_cancel;
 156                 uint32_t pending_id;
 157         } cancel;
 158 
 159         /* the NT status for this request. Set by packet receive code
 160            or code detecting error. */
 161         NTSTATUS status;
 162         
 163         struct smb2_request_buffer in;
 164         struct smb2_request_buffer out;
 165 
 166         /* information on what to do with a reply when it is received
 167            asyncronously. If this is not setup when a reply is received then
 168            the reply is discarded
 169 
 170            The private pointer is private to the caller of the client
 171            library (the application), not private to the library
 172         */
 173         struct {
 174                 void (*fn)(struct smb2_request *);
 175                 void *private_data;
 176         } async;
 177 };
 178 
 179 
 180 #define SMB2_MIN_SIZE 0x42
 181 #define SMB2_MIN_SIZE_NO_BODY 0x40
 182 
 183 /* offsets into header elements for a sync SMB2 request */
 184 #define SMB2_HDR_PROTOCOL_ID    0x00
 185 #define SMB2_HDR_LENGTH         0x04
 186 #define SMB2_HDR_EPOCH          0x06
 187 #define SMB2_HDR_STATUS         0x08
 188 #define SMB2_HDR_OPCODE         0x0c
 189 #define SMB2_HDR_CREDIT         0x0e
 190 #define SMB2_HDR_FLAGS          0x10
 191 #define SMB2_HDR_NEXT_COMMAND   0x14
 192 #define SMB2_HDR_MESSAGE_ID     0x18
 193 #define SMB2_HDR_PID            0x20
 194 #define SMB2_HDR_TID            0x24
 195 #define SMB2_HDR_SESSION_ID     0x28
 196 #define SMB2_HDR_SIGNATURE      0x30 /* 16 bytes */
 197 #define SMB2_HDR_BODY           0x40
 198 
 199 /* header flags */
 200 #define SMB2_HDR_FLAG_REDIRECT  0x01
 201 #define SMB2_HDR_FLAG_ASYNC     0x02
 202 #define SMB2_HDR_FLAG_CHAINED   0x04
 203 #define SMB2_HDR_FLAG_SIGNED    0x08
 204 #define SMB2_HDR_FLAG_DFS       0x10000000
 205 
 206 /* SMB2 opcodes */
 207 #define SMB2_OP_NEGPROT   0x00
 208 #define SMB2_OP_SESSSETUP 0x01
 209 #define SMB2_OP_LOGOFF    0x02
 210 #define SMB2_OP_TCON      0x03
 211 #define SMB2_OP_TDIS      0x04
 212 #define SMB2_OP_CREATE    0x05
 213 #define SMB2_OP_CLOSE     0x06
 214 #define SMB2_OP_FLUSH     0x07
 215 #define SMB2_OP_READ      0x08
 216 #define SMB2_OP_WRITE     0x09
 217 #define SMB2_OP_LOCK      0x0a
 218 #define SMB2_OP_IOCTL     0x0b
 219 #define SMB2_OP_CANCEL    0x0c
 220 #define SMB2_OP_KEEPALIVE 0x0d
 221 #define SMB2_OP_FIND      0x0e
 222 #define SMB2_OP_NOTIFY    0x0f
 223 #define SMB2_OP_GETINFO   0x10
 224 #define SMB2_OP_SETINFO   0x11
 225 #define SMB2_OP_BREAK     0x12
 226 
 227 #define SMB2_MAGIC 0x424D53FE /* 0xFE 'S' 'M' 'B' */
 228 
 229 /* the dialect we support */
 230 #define SMB2_DIALECT_REVISION           0x202
 231 
 232 /* SMB2 negotiate security_mode */
 233 #define SMB2_NEGOTIATE_SIGNING_ENABLED   0x01
 234 #define SMB2_NEGOTIATE_SIGNING_REQUIRED  0x02
 235 
 236 /* SMB2 capabilities - only 1 so far. I'm sure more will be added */
 237 #define SMB2_CAP_DFS                     0x0
 238 /* so we can spot new caps as added */
 239 #define SMB2_CAP_ALL                     SMB2_CAP_DFS 
 240 
 241 /* SMB2 share flags */
 242 #define SMB2_SHAREFLAG_MANUAL_CACHING                    0x0000
 243 #define SMB2_SHAREFLAG_AUTO_CACHING                      0x0010
 244 #define SMB2_SHAREFLAG_VDO_CACHING                       0x0020
 245 #define SMB2_SHAREFLAG_NO_CACHING                        0x0030
 246 #define SMB2_SHAREFLAG_DFS                               0x0001
 247 #define SMB2_SHAREFLAG_DFS_ROOT                          0x0002
 248 #define SMB2_SHAREFLAG_RESTRICT_EXCLUSIVE_OPENS          0x0100
 249 #define SMB2_SHAREFLAG_FORCE_SHARED_DELETE               0x0200
 250 #define SMB2_SHAREFLAG_ALLOW_NAMESPACE_CACHING           0x0400
 251 #define SMB2_SHAREFLAG_ACCESS_BASED_DIRECTORY_ENUM       0x0800
 252 #define SMB2_SHAREFLAG_ALL                               0x0F33
 253 
 254 /* SMB2 create security flags */
 255 #define SMB2_SECURITY_DYNAMIC_TRACKING                   0x01
 256 #define SMB2_SECURITY_EFFECTIVE_ONLY                     0x02
 257 
 258 /* SMB2 requested oplock levels */
 259 #define SMB2_OPLOCK_LEVEL_NONE                           0x00
 260 #define SMB2_OPLOCK_LEVEL_II                             0x01
 261 #define SMB2_OPLOCK_LEVEL_EXCLUSIVE                      0x08
 262 #define SMB2_OPLOCK_LEVEL_BATCH                          0x09
 263 
 264 /* SMB2 impersonation levels */
 265 #define SMB2_IMPERSONATION_ANONYMOUS                     0x00
 266 #define SMB2_IMPERSONATION_IDENTIFICATION                0x01
 267 #define SMB2_IMPERSONATION_IMPERSONATION                 0x02
 268 #define SMB2_IMPERSONATION_DELEGATE                      0x03
 269 
 270 /* SMB2 create tags */
 271 #define SMB2_CREATE_TAG_EXTA "ExtA"
 272 #define SMB2_CREATE_TAG_MXAC "MxAc"
 273 #define SMB2_CREATE_TAG_SECD "SecD"
 274 #define SMB2_CREATE_TAG_DHNQ "DHnQ"
 275 #define SMB2_CREATE_TAG_DHNC "DHnC"
 276 #define SMB2_CREATE_TAG_ALSI "AlSi"
 277 #define SMB2_CREATE_TAG_TWRP "TWrp"
 278 #define SMB2_CREATE_TAG_QFID "QFid"
 279 
 280 /* SMB2 Create ignore some more create_options */
 281 #define SMB2_CREATE_OPTIONS_NOT_SUPPORTED_MASK  (NTCREATEX_OPTIONS_TREE_CONNECTION | \
 282                                                  NTCREATEX_OPTIONS_OPFILTER)
 283 
 284 /*
 285   check that a body has the expected size
 286 */
 287 #define SMB2_CHECK_PACKET_RECV(req, size, dynamic) do { \
 288         size_t is_size = req->in.body_size; \
 289         uint16_t field_size = SVAL(req->in.body, 0); \
 290         uint16_t want_size = ((dynamic)?(size)+1:(size)); \
 291         if (is_size < (size)) { \
 292                 DEBUG(0,("%s: buffer too small 0x%x. Expected 0x%x\n", \
 293                          __location__, (unsigned)is_size, (unsigned)want_size)); \
 294                 return NT_STATUS_BUFFER_TOO_SMALL; \
 295         }\
 296         if (field_size != want_size) { \
 297                 DEBUG(0,("%s: unexpected fixed body size 0x%x. Expected 0x%x\n", \
 298                          __location__, (unsigned)field_size, (unsigned)want_size)); \
 299                 return NT_STATUS_INVALID_PARAMETER; \
 300         } \
 301 } while (0)
 302 
 303 #endif

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