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                                   0); /* max_dyn_len */
  90         if (tevent_req_nomem(subreq, req)) {
  91                 return tevent_req_post(req, ev);
  92         }
  93         tevent_req_set_callback(subreq, smb2cli_tcon_done, req);
  94         return req;
  95 }
  96
  97 static void smb2cli_tcon_done(struct tevent_req *subreq)
  98 {
  99         struct tevent_req *req = tevent_req_callback_data(
 100                 subreq, struct tevent_req);
 101         struct smb2cli_tcon_state *state = tevent_req_data(
 102                 req, struct smb2cli_tcon_state);
 103         struct cli_state *cli = state->cli;
 104         NTSTATUS status;
 105         struct iovec *iov;
 106         uint8_t *body;
 107         uint32_t tcon_id;
 108         uint8_t share_type;
 109         uint32_t share_flags;
 110         uint32_t share_capabilities;
 111         uint32_t maximal_access;
 112         static const struct smb2cli_req_expected_response expected[] = {
 113         {
 114                 .status = NT_STATUS_OK,
 115                 .body_size = 0x10
 116         }
 117         };
 118
 119         status = smb2cli_req_recv(subreq, state, &iov,
 120                                   expected, ARRAY_SIZE(expected));
 121         TALLOC_FREE(subreq);
 122         if (!NT_STATUS_IS_OK(status)) {
 123                 tevent_req_nterror(req, status);
 124                 return;
 125         }
 126
 127         tcon_id = IVAL(iov[0].iov_base, SMB2_HDR_TID);
 128
 129         body = (uint8_t *)iov[1].iov_base;
 130         share_type              = CVAL(body, 0x02);
 131         share_flags             = IVAL(body, 0x04);
 132         share_capabilities      = IVAL(body, 0x08);
 133         maximal_access          = IVAL(body, 0x0C);
 134
 135         cli->smb2.tcon = smbXcli_tcon_create(cli);
 136         if (tevent_req_nomem(cli->smb2.tcon, req)) {
 137                 return;
 138         }
 139
 140         smb2cli_tcon_set_values(cli->smb2.tcon,
 141                                 cli->smb2.session,
 142                                 tcon_id,
 143                                 share_type,
 144                                 share_flags,
 145                                 share_capabilities,
 146                                 maximal_access);
 147
 148         tevent_req_done(req);
 149 }
 150
 151 NTSTATUS smb2cli_tcon_recv(struct tevent_req *req)
 152 {
 153         return tevent_req_simple_recv_ntstatus(req);
 154 }
 155
 156 NTSTATUS smb2cli_tcon(struct cli_state *cli, const char *share)
 157 {
 158         TALLOC_CTX *frame = talloc_stackframe();
 159         struct tevent_context *ev;
 160         struct tevent_req *req;
 161         NTSTATUS status = NT_STATUS_NO_MEMORY;
 162
 163         if (smbXcli_conn_has_async_calls(cli->conn)) {
 164                 /*
 165                  * Can't use sync call while an async call is in flight
 166                  */
 167                 status = NT_STATUS_INVALID_PARAMETER;
 168                 goto fail;
 169         }
 170         ev = samba_tevent_context_init(frame);
 171         if (ev == NULL) {
 172                 goto fail;
 173         }
 174         req = smb2cli_tcon_send(frame, ev, cli, share);
 175         if (req == NULL) {
 176                 goto fail;
 177         }
 178         if (!tevent_req_poll_ntstatus(req, ev, &status)) {
 179                 goto fail;
 180         }
 181         status = smb2cli_tcon_recv(req);
 182  fail:
 183         TALLOC_FREE(frame);
 184         return status;
 185 }
 186
 187 struct smb2cli_tdis_state {
 188         struct cli_state *cli;
 189         uint8_t fixed[4];
 190 };
 191
 192 static void smb2cli_tdis_done(struct tevent_req *subreq);
 193
 194 struct tevent_req *smb2cli_tdis_send(TALLOC_CTX *mem_ctx,
 195                                       struct tevent_context *ev,
 196                                       struct cli_state *cli)
 197 {
 198         struct tevent_req *req, *subreq;
 199         struct smb2cli_tdis_state *state;
 200
 201         req = tevent_req_create(mem_ctx, &state,
 202                                 struct smb2cli_tdis_state);
 203         if (req == NULL) {
 204                 return NULL;
 205         }
 206         state->cli = cli;
 207         SSVAL(state->fixed, 0, 4);
 208
 209         subreq = smb2cli_req_send(state, ev, cli->conn, SMB2_OP_TDIS,
 210                                   0, 0, /* flags */
 211                                   cli->timeout,
 212                                   cli->smb2.tcon,
 213                                   cli->smb2.session,
 214                                   state->fixed, sizeof(state->fixed),
 215                                   NULL, 0, /* dyn* */
 216                                   0); /* max_dyn_len */
 217         if (tevent_req_nomem(subreq, req)) {
 218                 return tevent_req_post(req, ev);
 219         }
 220         tevent_req_set_callback(subreq, smb2cli_tdis_done, req);
 221         return req;
 222 }
 223
 224 static void smb2cli_tdis_done(struct tevent_req *subreq)
 225 {
 226         struct tevent_req *req =
 227                 tevent_req_callback_data(subreq,
 228                 struct tevent_req);
 229         struct smb2cli_tdis_state *state =
 230                 tevent_req_data(req,
 231                 struct smb2cli_tdis_state);
 232         NTSTATUS status;
 233         static const struct smb2cli_req_expected_response expected[] = {
 234         {
 235                 .status = NT_STATUS_OK,
 236                 .body_size = 0x04
 237         }
 238         };
 239
 240         status = smb2cli_req_recv(subreq, NULL, NULL,
 241                                   expected, ARRAY_SIZE(expected));
 242         TALLOC_FREE(subreq);
 243         if (tevent_req_nterror(req, status)) {
 244                 return;
 245         }
 246         smb2cli_tcon_set_values(state->cli->smb2.tcon, NULL,
 247                                 UINT32_MAX, 0, 0, 0, 0);
 248         tevent_req_done(req);
 249 }
 250
 251 NTSTATUS smb2cli_tdis_recv(struct tevent_req *req)
 252 {
 253         return tevent_req_simple_recv_ntstatus(req);
 254 }
 255
 256 NTSTATUS smb2cli_tdis(struct cli_state *cli)
 257 {
 258         TALLOC_CTX *frame = talloc_stackframe();
 259         struct tevent_context *ev;
 260         struct tevent_req *req;
 261         NTSTATUS status = NT_STATUS_NO_MEMORY;
 262
 263         if (smbXcli_conn_has_async_calls(cli->conn)) {
 264                 /*
 265                  * Can't use sync call while an async call is in flight
 266                  */
 267                 status = NT_STATUS_INVALID_PARAMETER;
 268                 goto fail;
 269         }
 270         ev = samba_tevent_context_init(frame);
 271         if (ev == NULL) {
 272                 goto fail;
 273         }
 274         req = smb2cli_tdis_send(frame, ev, cli);
 275         if (req == NULL) {
 276                 goto fail;
 277         }
 278         if (!tevent_req_poll_ntstatus(req, ev, &status)) {
 279                 goto fail;
 280         }
 281         status = smb2cli_tdis_recv(req);
 282  fail:
 283         TALLOC_FREE(frame);
 284         return status;
 285 }