source3/smbd/smb2_break.c

   1 /*
   2    Unix SMB/CIFS implementation.
   3    Core SMB2 server
   4
   5    Copyright (C) Stefan Metzmacher 2009
   6
   7    This program is free software; you can redistribute it and/or modify
   8    it under the terms of the GNU General Public License as published by
   9    the Free Software Foundation; either version 3 of the License, or
  10    (at your option) any later version.
  11
  12    This program is distributed in the hope that it will be useful,
  13    but WITHOUT ANY WARRANTY; without even the implied warranty of
  14    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15    GNU General Public License for more details.
  16
  17    You should have received a copy of the GNU General Public License
  18    along with this program.  If not, see <http://www.gnu.org/licenses/>.
  19 */
  20
  21 #include "includes.h"
  22 #include "smbd/globals.h"
  23 #include "../libcli/smb/smb_common.h"
  24
  25 static struct tevent_req *smbd_smb2_oplock_break_send(TALLOC_CTX *mem_ctx,
  26                                                       struct tevent_context *ev,
  27                                                       struct smbd_smb2_request *smb2req,
  28                                                       uint8_t in_oplock_level,
  29                                                       uint64_t in_file_id_volatile);
  30 static NTSTATUS smbd_smb2_oplock_break_recv(struct tevent_req *req,
  31                                             uint8_t *out_oplock_level);
  32
  33 static void smbd_smb2_request_oplock_break_done(struct tevent_req *subreq);
  34 NTSTATUS smbd_smb2_request_process_break(struct smbd_smb2_request *req)
  35 {
  36         const uint8_t *inhdr;
  37         const uint8_t *inbody;
  38         int i = req->current_idx;
  39         size_t expected_body_size = 0x18;
  40         size_t body_size;
  41         uint8_t in_oplock_level;
  42         uint64_t in_file_id_persistent;
  43         uint64_t in_file_id_volatile;
  44         struct tevent_req *subreq;
  45
  46         inhdr = (const uint8_t *)req->in.vector[i+0].iov_base;
  47         if (req->in.vector[i+1].iov_len != (expected_body_size & 0xFFFFFFFE)) {
  48                 return smbd_smb2_request_error(req, NT_STATUS_INVALID_PARAMETER);
  49         }
  50
  51         inbody = (const uint8_t *)req->in.vector[i+1].iov_base;
  52
  53         body_size = SVAL(inbody, 0x00);
  54         if (body_size != expected_body_size) {
  55                 return smbd_smb2_request_error(req, NT_STATUS_INVALID_PARAMETER);
  56         }
  57
  58         in_oplock_level         = CVAL(inbody, 0x02);
  59         /* 0x03 1 bytes reserved */
  60         /* 0x04 4 bytes reserved */
  61         in_file_id_persistent           = BVAL(inbody, 0x08);
  62         in_file_id_volatile             = BVAL(inbody, 0x10);
  63
  64         if (req->compat_chain_fsp) {
  65                 /* skip check */
  66         } else if (in_file_id_persistent != 0) {
  67                 return smbd_smb2_request_error(req, NT_STATUS_FILE_CLOSED);
  68         }
  69
  70         subreq = smbd_smb2_oplock_break_send(req,
  71                                              req->sconn->smb2.event_ctx,
  72                                              req,
  73                                              in_oplock_level,
  74                                              in_file_id_volatile);
  75         if (subreq == NULL) {
  76                 return smbd_smb2_request_error(req, NT_STATUS_NO_MEMORY);
  77         }
  78         tevent_req_set_callback(subreq, smbd_smb2_request_oplock_break_done, req);
  79
  80         return smbd_smb2_request_pending_queue(req, subreq);
  81 }
  82
  83 static void smbd_smb2_request_oplock_break_done(struct tevent_req *subreq)
  84 {
  85         struct smbd_smb2_request *req = tevent_req_callback_data(subreq,
  86                                         struct smbd_smb2_request);
  87         const uint8_t *inbody;
  88         int i = req->current_idx;
  89         uint64_t in_file_id_persistent;
  90         uint64_t in_file_id_volatile;
  91         uint8_t out_oplock_level = 0;
  92         DATA_BLOB outbody;
  93         NTSTATUS status;
  94         NTSTATUS error; /* transport error */
  95
  96         status = smbd_smb2_oplock_break_recv(subreq, &out_oplock_level);
  97         TALLOC_FREE(subreq);
  98         if (!NT_STATUS_IS_OK(status)) {
  99                 error = smbd_smb2_request_error(req, status);
 100                 if (!NT_STATUS_IS_OK(error)) {
 101                         smbd_server_connection_terminate(req->sconn,
 102                                                          nt_errstr(error));
 103                         return;
 104                 }
 105                 return;
 106         }
 107
 108         inbody = (const uint8_t *)req->in.vector[i+1].iov_base;
 109
 110         in_file_id_persistent   = BVAL(inbody, 0x08);
 111         in_file_id_volatile     = BVAL(inbody, 0x10);
 112
 113         outbody = data_blob_talloc(req->out.vector, NULL, 0x18);
 114         if (outbody.data == NULL) {
 115                 error = smbd_smb2_request_error(req, NT_STATUS_NO_MEMORY);
 116                 if (!NT_STATUS_IS_OK(error)) {
 117                         smbd_server_connection_terminate(req->sconn,
 118                                                          nt_errstr(error));
 119                         return;
 120                 }
 121                 return;
 122         }
 123
 124         SSVAL(outbody.data, 0x00, 0x18);        /* struct size */
 125         SCVAL(outbody.data, 0x02,
 126               out_oplock_level);                /* oplock level */
 127         SCVAL(outbody.data, 0x03, 0);           /* reserved */
 128         SIVAL(outbody.data, 0x04, 0);           /* reserved */
 129         SBVAL(outbody.data, 0x08,
 130               in_file_id_persistent);           /* file id (persistent) */
 131         SBVAL(outbody.data, 0x10,
 132               in_file_id_volatile);             /* file id (volatile) */
 133
 134         error = smbd_smb2_request_done(req, outbody, NULL);
 135         if (!NT_STATUS_IS_OK(error)) {
 136                 smbd_server_connection_terminate(req->sconn,
 137                                                  nt_errstr(error));
 138                 return;
 139         }
 140 }
 141
 142 struct smbd_smb2_oplock_break_state {
 143         struct smbd_smb2_request *smb2req;
 144         uint8_t out_oplock_level;
 145 };
 146
 147 static struct tevent_req *smbd_smb2_oplock_break_send(TALLOC_CTX *mem_ctx,
 148                                                       struct tevent_context *ev,
 149                                                       struct smbd_smb2_request *smb2req,
 150                                                       uint8_t in_oplock_level,
 151                                                       uint64_t in_file_id_volatile)
 152 {
 153         struct tevent_req *req;
 154         struct smbd_smb2_oplock_break_state *state;
 155         struct smb_request *smbreq;
 156         connection_struct *conn = smb2req->tcon->compat_conn;
 157         files_struct *fsp;
 158
 159         req = tevent_req_create(mem_ctx, &state,
 160                                 struct smbd_smb2_oplock_break_state);
 161         if (req == NULL) {
 162                 return NULL;
 163         }
 164         state->smb2req = smb2req;
 165         state->out_oplock_level = SMB2_OPLOCK_LEVEL_NONE;
 166
 167         DEBUG(10,("smbd_smb2_oplock_break_send: file_id[0x%016llX]\n",
 168                   (unsigned long long)in_file_id_volatile));
 169
 170         smbreq = smbd_smb2_fake_smb_request(smb2req);
 171         if (tevent_req_nomem(smbreq, req)) {
 172                 return tevent_req_post(req, ev);
 173         }
 174
 175         fsp = file_fsp(smbreq, (uint16_t)in_file_id_volatile);
 176         if (fsp == NULL) {
 177                 tevent_req_nterror(req, NT_STATUS_FILE_CLOSED);
 178                 return tevent_req_post(req, ev);
 179         }
 180         if (conn != fsp->conn) {
 181                 tevent_req_nterror(req, NT_STATUS_FILE_CLOSED);
 182                 return tevent_req_post(req, ev);
 183         }
 184         if (smb2req->session->vuid != fsp->vuid) {
 185                 tevent_req_nterror(req, NT_STATUS_FILE_CLOSED);
 186                 return tevent_req_post(req, ev);
 187         }
 188
 189         tevent_req_nterror(req, NT_STATUS_NOT_IMPLEMENTED);
 190         return tevent_req_post(req, ev);
 191 }
 192
 193 static NTSTATUS smbd_smb2_oplock_break_recv(struct tevent_req *req,
 194                                             uint8_t *out_oplock_level)
 195 {
 196         NTSTATUS status;
 197         struct smbd_smb2_oplock_break_state *state =
 198                 tevent_req_data(req,
 199                 struct smbd_smb2_oplock_break_state);
 200
 201         if (tevent_req_is_nterror(req, &status)) {
 202                 tevent_req_received(req);
 203                 return status;
 204         }
 205
 206         *out_oplock_level = state->out_oplock_level;
 207
 208         tevent_req_received(req);
 209         return NT_STATUS_OK;
 210 }