source3/libsmb/smb2cli_tcon.c

   1 /*
   2    Unix SMB/CIFS implementation.
   3    smb2 lib
   4    Copyright (C) Volker Lendecke 2011
   5
   6    This program is free software; you can redistribute it and/or modify
   7    it under the terms of the GNU General Public License as published by
   8    the Free Software Foundation; either version 3 of the License, or
   9    (at your option) any later version.
  10
  11    This program is distributed in the hope that it will be useful,
  12    but WITHOUT ANY WARRANTY; without even the implied warranty of
  13    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14    GNU General Public License for more details.
  15
  16    You should have received a copy of the GNU General Public License
  17    along with this program.  If not, see <http://www.gnu.org/licenses/>.
  18 */
  19
  20 #include "includes.h"
  21 #include "client.h"
  22 #include "async_smb.h"
  23 #include "../libcli/smb/smbXcli_base.h"
  24 #include "smb2cli.h"
  25 #include "libsmb/proto.h"
  26 #include "lib/util/tevent_ntstatus.h"
  27
  28 struct smb2cli_tcon_state {
  29         struct cli_state *cli;
  30         uint8_t fixed[8];
  31         uint8_t dyn_pad[1];
  32 };
  33
  34 static void smb2cli_tcon_done(struct tevent_req *subreq);
  35
  36 struct tevent_req *smb2cli_tcon_send(TALLOC_CTX *mem_ctx,
  37                                      struct tevent_context *ev,
  38                                      struct cli_state *cli,
  39                                      const char *share)
  40 {
  41         struct tevent_req *req, *subreq;
  42         struct smb2cli_tcon_state *state;
  43         uint8_t *fixed;
  44         const char *tcon_share;
  45         uint8_t *dyn;
  46         size_t dyn_len;
  47
  48         req = tevent_req_create(mem_ctx, &state, struct smb2cli_tcon_state);
  49         if (req == NULL) {
  50                 return NULL;
  51         }
  52         state->cli = cli;
  53
  54         tcon_share = talloc_asprintf(state, "\\\\%s\\%s",
  55                                      smbXcli_conn_remote_name(cli->conn),
  56                                      share);
  57         if (tevent_req_nomem(tcon_share, req)) {
  58                 return tevent_req_post(req, ev);
  59         }
  60         if (!convert_string_talloc(state, CH_UNIX, CH_UTF16,
  61                                    tcon_share, strlen(tcon_share),
  62                                    &dyn, &dyn_len)) {
  63                 tevent_req_oom(req);
  64                 return tevent_req_post(req, ev);
  65         }
  66
  67         if (strlen(tcon_share) == 0) {
  68                 TALLOC_FREE(dyn);
  69                 dyn_len = 0;
  70         }
  71
  72         fixed = state->fixed;
  73         SSVAL(fixed, 0, 9);
  74         SSVAL(fixed, 4, SMB2_HDR_BODY + 8);
  75         SSVAL(fixed, 6, dyn_len);
  76
  77         if (dyn_len == 0) {
  78                 dyn = state->dyn_pad;;
  79                 dyn_len = sizeof(state->dyn_pad);
  80         }
  81
  82         subreq = smb2cli_req_send(state, ev, cli->conn, SMB2_OP_TCON,
  83                                   0, 0, /* flags */
  84                                   cli->timeout,
  85                                   NULL, /* tcon */
  86                                   cli->smb2.session,
  87                                   state->fixed, sizeof(state->fixed),
  88                                   dyn, dyn_len);
  89         if (tevent_req_nomem(subreq, req)) {
  90                 return tevent_req_post(req, ev);
  91         }
  92         tevent_req_set_callback(subreq, smb2cli_tcon_done, req);
  93         return req;
  94 }
  95
  96 static void smb2cli_tcon_done(struct tevent_req *subreq)
  97 {
  98         struct tevent_req *req = tevent_req_callback_data(
  99                 subreq, struct tevent_req);
 100         struct smb2cli_tcon_state *state = tevent_req_data(
 101                 req, struct smb2cli_tcon_state);
 102         struct cli_state *cli = state->cli;
 103         NTSTATUS status;
 104         struct iovec *iov;
 105         uint8_t *body;
 106         uint32_t tcon_id;
 107         uint8_t share_type;
 108         uint32_t share_flags;
 109         uint32_t share_capabilities;
 110         uint32_t maximal_access;
 111         static const struct smb2cli_req_expected_response expected[] = {
 112         {
 113                 .status = NT_STATUS_OK,
 114                 .body_size = 0x10
 115         }
 116         };
 117
 118         status = smb2cli_req_recv(subreq, state, &iov,
 119                                   expected, ARRAY_SIZE(expected));
 120         TALLOC_FREE(subreq);
 121         if (!NT_STATUS_IS_OK(status)) {
 122                 tevent_req_nterror(req, status);
 123                 return;
 124         }
 125
 126         tcon_id = IVAL(iov[0].iov_base, SMB2_HDR_TID);
 127
 128         body = (uint8_t *)iov[1].iov_base;
 129         share_type              = CVAL(body, 0x02);
 130         share_flags             = IVAL(body, 0x04);
 131         share_capabilities      = IVAL(body, 0x08);
 132         maximal_access          = IVAL(body, 0x0C);
 133
 134         cli->smb2.tcon = smbXcli_tcon_create(cli);
 135         if (tevent_req_nomem(cli->smb2.tcon, req)) {
 136                 return;
 137         }
 138
 139         smb2cli_tcon_set_values(cli->smb2.tcon,
 140                                 cli->smb2.session,
 141                                 tcon_id,
 142                                 share_type,
 143                                 share_flags,
 144                                 share_capabilities,
 145                                 maximal_access);
 146
 147         tevent_req_done(req);
 148 }
 149
 150 NTSTATUS smb2cli_tcon_recv(struct tevent_req *req)
 151 {
 152         return tevent_req_simple_recv_ntstatus(req);
 153 }
 154
 155 NTSTATUS smb2cli_tcon(struct cli_state *cli, const char *share)
 156 {
 157         TALLOC_CTX *frame = talloc_stackframe();
 158         struct tevent_context *ev;
 159         struct tevent_req *req;
 160         NTSTATUS status = NT_STATUS_NO_MEMORY;
 161
 162         if (smbXcli_conn_has_async_calls(cli->conn)) {
 163                 /*
 164                  * Can't use sync call while an async call is in flight
 165                  */
 166                 status = NT_STATUS_INVALID_PARAMETER;
 167                 goto fail;
 168         }
 169         ev = tevent_context_init(frame);
 170         if (ev == NULL) {
 171                 goto fail;
 172         }
 173         req = smb2cli_tcon_send(frame, ev, cli, share);
 174         if (req == NULL) {
 175                 goto fail;
 176         }
 177         if (!tevent_req_poll_ntstatus(req, ev, &status)) {
 178                 goto fail;
 179         }
 180         status = smb2cli_tcon_recv(req);
 181  fail:
 182         TALLOC_FREE(frame);
 183         return status;
 184 }
 185
 186 struct smb2cli_tdis_state {
 187         struct cli_state *cli;
 188         uint8_t fixed[4];
 189 };
 190
 191 static void smb2cli_tdis_done(struct tevent_req *subreq);
 192
 193 struct tevent_req *smb2cli_tdis_send(TALLOC_CTX *mem_ctx,
 194                                       struct tevent_context *ev,
 195                                       struct cli_state *cli)
 196 {
 197         struct tevent_req *req, *subreq;
 198         struct smb2cli_tdis_state *state;
 199
 200         req = tevent_req_create(mem_ctx, &state,
 201                                 struct smb2cli_tdis_state);
 202         if (req == NULL) {
 203                 return NULL;
 204         }
 205         state->cli = cli;
 206         SSVAL(state->fixed, 0, 4);
 207
 208         subreq = smb2cli_req_send(state, ev, cli->conn, SMB2_OP_TDIS,
 209                                   0, 0, /* flags */
 210                                   cli->timeout,
 211                                   cli->smb2.tcon,
 212                                   cli->smb2.session,
 213                                   state->fixed, sizeof(state->fixed),
 214                                   NULL, 0);
 215         if (tevent_req_nomem(subreq, req)) {
 216                 return tevent_req_post(req, ev);
 217         }
 218         tevent_req_set_callback(subreq, smb2cli_tdis_done, req);
 219         return req;
 220 }
 221
 222 static void smb2cli_tdis_done(struct tevent_req *subreq)
 223 {
 224         struct tevent_req *req =
 225                 tevent_req_callback_data(subreq,
 226                 struct tevent_req);
 227         struct smb2cli_tdis_state *state =
 228                 tevent_req_data(req,
 229                 struct smb2cli_tdis_state);
 230         NTSTATUS status;
 231         static const struct smb2cli_req_expected_response expected[] = {
 232         {
 233                 .status = NT_STATUS_OK,
 234                 .body_size = 0x04
 235         }
 236         };
 237
 238         status = smb2cli_req_recv(subreq, NULL, NULL,
 239                                   expected, ARRAY_SIZE(expected));
 240         TALLOC_FREE(subreq);
 241         if (tevent_req_nterror(req, status)) {
 242                 return;
 243         }
 244         TALLOC_FREE(state->cli->smb2.tcon);
 245         tevent_req_done(req);
 246 }
 247
 248 NTSTATUS smb2cli_tdis_recv(struct tevent_req *req)
 249 {
 250         return tevent_req_simple_recv_ntstatus(req);
 251 }
 252
 253 NTSTATUS smb2cli_tdis(struct cli_state *cli)
 254 {
 255         TALLOC_CTX *frame = talloc_stackframe();
 256         struct tevent_context *ev;
 257         struct tevent_req *req;
 258         NTSTATUS status = NT_STATUS_NO_MEMORY;
 259
 260         if (smbXcli_conn_has_async_calls(cli->conn)) {
 261                 /*
 262                  * Can't use sync call while an async call is in flight
 263                  */
 264                 status = NT_STATUS_INVALID_PARAMETER;
 265                 goto fail;
 266         }
 267         ev = tevent_context_init(frame);
 268         if (ev == NULL) {
 269                 goto fail;
 270         }
 271         req = smb2cli_tdis_send(frame, ev, cli);
 272         if (req == NULL) {
 273                 goto fail;
 274         }
 275         if (!tevent_req_poll_ntstatus(req, ev, &status)) {
 276                 goto fail;
 277         }
 278         status = smb2cli_tdis_recv(req);
 279  fail:
 280         TALLOC_FREE(frame);
 281         return status;
 282 }