Line data    Source code

       1             : /* 
       2             :    Unix SMB/CIFS implementation.
       3             : 
       4             :    SMB2 client ioctl call
       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             : #include "includes.h"
      23             : #include "libcli/smb2/smb2.h"
      24             : #include "libcli/smb2/smb2_calls.h"
      25             : #include "librpc/gen_ndr/ioctl.h"
      26             : 
      27             : /*
      28             :   send a ioctl request
      29             : */
      30        1661 : struct smb2_request *smb2_ioctl_send(struct smb2_tree *tree, struct smb2_ioctl *io)
      31             : {
      32           2 :         NTSTATUS status;
      33           2 :         struct smb2_request *req;
      34           2 :         uint64_t max_payload_in;
      35           2 :         uint64_t max_payload_out;
      36           2 :         size_t max_payload;
      37             : 
      38        1663 :         req = smb2_request_init_tree(tree, SMB2_OP_IOCTL, 0x38, true,
      39        1661 :                                      io->in.in.length+io->in.out.length);
      40        1661 :         if (req == NULL) return NULL;
      41             : 
      42        1661 :         SSVAL(req->out.body, 0x02, 0); /* pad */
      43        1661 :         SIVAL(req->out.body, 0x04, io->in.function);
      44        1661 :         smb2_push_handle(req->out.body+0x08, &io->in.file.handle);
      45             : 
      46        1661 :         status = smb2_push_o32s32_blob(&req->out, 0x18, io->in.out);
      47        1661 :         if (!NT_STATUS_IS_OK(status)) {
      48           0 :                 talloc_free(req);
      49           0 :                 return NULL;
      50             :         }
      51             : 
      52        1661 :         SIVAL(req->out.body, 0x20, io->in.max_input_response);
      53             : 
      54        1661 :         status = smb2_push_o32s32_blob(&req->out, 0x24, io->in.in);
      55        1661 :         if (!NT_STATUS_IS_OK(status)) {
      56           0 :                 talloc_free(req);
      57           0 :                 return NULL;
      58             :         }
      59             : 
      60        1661 :         SIVAL(req->out.body, 0x2C, io->in.max_output_response);
      61        1661 :         SBVAL(req->out.body, 0x30, io->in.flags);
      62             : 
      63        1661 :         max_payload_in = io->in.out.length + io->in.in.length;
      64        1661 :         max_payload_in = MIN(max_payload_in, UINT32_MAX);
      65        1661 :         max_payload_out = io->in.max_input_response + io->in.max_output_response;
      66        1661 :         max_payload_out = MIN(max_payload_out, UINT32_MAX);
      67             : 
      68        1661 :         max_payload = MAX(max_payload_in, max_payload_out);
      69        1661 :         req->credit_charge = (MAX(max_payload, 1) - 1)/ 65536 + 1;
      70             : 
      71        1661 :         smb2_transport_send(req);
      72             : 
      73        1661 :         return req;
      74             : }
      75             : 
      76             : /*
      77             :  * 3.3.4.4 Sending an Error Response
      78             :  */
      79        1661 : static bool smb2_ioctl_is_failure(uint32_t ctl_code, NTSTATUS status,
      80             :                                   size_t data_size)
      81             : {
      82        1661 :         if (NT_STATUS_IS_OK(status)) {
      83        1322 :                 return false;
      84             :         }
      85             : 
      86         339 :         if (NT_STATUS_EQUAL(status, STATUS_BUFFER_OVERFLOW)
      87           0 :          && ((ctl_code == FSCTL_PIPE_TRANSCEIVE)
      88           0 :           || (ctl_code == FSCTL_PIPE_PEEK)
      89           0 :           || (ctl_code == FSCTL_DFS_GET_REFERRALS))) {
      90           0 :                 return false;
      91             :         }
      92             : 
      93         339 :         if (((ctl_code == FSCTL_SRV_COPYCHUNK)
      94         243 :                                 || (ctl_code == FSCTL_SRV_COPYCHUNK_WRITE))
      95          96 :          && (data_size == sizeof(struct srv_copychunk_rsp))) {
      96             :                 /*
      97             :                  * copychunk responses may come with copychunk data or error
      98             :                  * response data, independent of status.
      99             :                  */
     100          88 :                 return false;
     101             :         }
     102             : 
     103         249 :         return true;
     104             : }
     105             : 
     106             : /*
     107             :   recv a ioctl reply
     108             : */
     109        1661 : NTSTATUS smb2_ioctl_recv(struct smb2_request *req,
     110             :                          TALLOC_CTX *mem_ctx, struct smb2_ioctl *io)
     111             : {
     112           2 :         NTSTATUS status;
     113             : 
     114        3320 :         if (!smb2_request_receive(req) ||
     115        1661 :             smb2_ioctl_is_failure(io->in.function, req->status,
     116             :                                   req->in.bufinfo.data_size)) {
     117         251 :                 return smb2_request_destroy(req);
     118             :         }
     119             : 
     120        1410 :         SMB2_CHECK_PACKET_RECV(req, 0x30, true);
     121             : 
     122        1410 :         io->out.reserved   = SVAL(req->in.body, 0x02);
     123        1410 :         io->out.function   = IVAL(req->in.body, 0x04);
     124        1410 :         smb2_pull_handle(req->in.body+0x08, &io->out.file.handle);
     125             : 
     126        1410 :         status = smb2_pull_o32s32_blob(&req->in, mem_ctx, req->in.body+0x18, &io->out.in);
     127        1410 :         if (!NT_STATUS_IS_OK(status)) {
     128           0 :                 smb2_request_destroy(req);
     129           0 :                 return status;
     130             :         }
     131             : 
     132        1410 :         status = smb2_pull_o32s32_blob(&req->in, mem_ctx, req->in.body+0x20, &io->out.out);
     133        1410 :         if (!NT_STATUS_IS_OK(status)) {
     134           0 :                 smb2_request_destroy(req);
     135           0 :                 return status;
     136             :         }
     137             : 
     138        1410 :         io->out.flags     = IVAL(req->in.body, 0x28);
     139        1410 :         io->out.reserved2 = IVAL(req->in.body, 0x2C);
     140             : 
     141        1410 :         return smb2_request_destroy(req);
     142             : }
     143             : 
     144             : /*
     145             :   sync ioctl request
     146             : */
     147        1634 : NTSTATUS smb2_ioctl(struct smb2_tree *tree, TALLOC_CTX *mem_ctx, struct smb2_ioctl *io)
     148             : {
     149        1634 :         struct smb2_request *req = smb2_ioctl_send(tree, io);
     150        1634 :         return smb2_ioctl_recv(req, mem_ctx, io);
     151             : }