libcli/smb/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 "system/network.h"
  22 #include "../lib/util/tevent_ntstatus.h"
  23 #include "../libcli/smb/smb_common.h"
  24 #include "../libcli/smb/smbXcli_base.h"
  25
  26 struct smb2cli_tcon_state {
  27         struct tevent_context *ev;
  28         struct smbXcli_conn *conn;
  29         uint32_t timeout_msec;
  30         struct smbXcli_session *session;
  31         struct smbXcli_tcon *tcon;
  32         uint8_t fixed[8];
  33         uint8_t dyn_pad[1];
  34 };
  35
  36 static void smb2cli_tcon_done(struct tevent_req *subreq);
  37
  38 struct tevent_req *smb2cli_tcon_send(TALLOC_CTX *mem_ctx,
  39                                      struct tevent_context *ev,
  40                                      struct smbXcli_conn *conn,
  41                                      uint32_t timeout_msec,
  42                                      struct smbXcli_session *session,
  43                                      struct smbXcli_tcon *tcon,
  44                                      uint16_t flags,
  45                                      const char *unc)
  46 {
  47         struct tevent_req *req, *subreq;
  48         struct smb2cli_tcon_state *state;
  49         uint8_t *fixed;
  50         uint8_t *dyn;
  51         size_t dyn_len;
  52         uint32_t additional_flags = 0;
  53         uint32_t clear_flags = 0;
  54
  55         req = tevent_req_create(mem_ctx, &state, struct smb2cli_tcon_state);
  56         if (req == NULL) {
  57                 return NULL;
  58         }
  59         state->ev = ev;
  60         state->conn = conn;
  61         state->timeout_msec = timeout_msec;
  62         state->session = session;
  63         state->tcon = tcon;
  64
  65         if (!convert_string_talloc(state, CH_UNIX, CH_UTF16,
  66                                    unc, strlen(unc),
  67                                    &dyn, &dyn_len)) {
  68                 tevent_req_oom(req);
  69                 return tevent_req_post(req, ev);
  70         }
  71
  72         if (strlen(unc) == 0) {
  73                 TALLOC_FREE(dyn);
  74                 dyn_len = 0;
  75         }
  76
  77         fixed = state->fixed;
  78         SSVAL(fixed, 0, 9);
  79         if (smbXcli_conn_protocol(conn) >= PROTOCOL_SMB3_10) {
  80                 SSVAL(fixed, 2, flags);
  81         } else {
  82                 SSVAL(fixed, 2, 0); /* Reserved */
  83         }
  84         SSVAL(fixed, 4, SMB2_HDR_BODY + 8);
  85         SSVAL(fixed, 6, dyn_len);
  86
  87         if (dyn_len == 0) {
  88                 dyn = state->dyn_pad;
  89                 dyn_len = sizeof(state->dyn_pad);
  90         }
  91
  92         if (smbXcli_session_is_authenticated(state->session)) {
  93                 additional_flags |= SMB2_HDR_FLAG_SIGNED;
  94         }
  95
  96         subreq = smb2cli_req_send(state, ev, conn, SMB2_OP_TCON,
  97                                   additional_flags, clear_flags,
  98                                   timeout_msec,
  99                                   NULL, /* tcon */
 100                                   session,
 101                                   state->fixed, sizeof(state->fixed),
 102                                   dyn, dyn_len,
 103                                   0); /* max_dyn_len */
 104         if (tevent_req_nomem(subreq, req)) {
 105                 return tevent_req_post(req, ev);
 106         }
 107         tevent_req_set_callback(subreq, smb2cli_tcon_done, req);
 108
 109         return req;
 110 }
 111
 112 static void smb2cli_tcon_validate(struct tevent_req *subreq);
 113
 114 static void smb2cli_tcon_done(struct tevent_req *subreq)
 115 {
 116         struct tevent_req *req = tevent_req_callback_data(
 117                 subreq, struct tevent_req);
 118         struct smb2cli_tcon_state *state = tevent_req_data(
 119                 req, struct smb2cli_tcon_state);
 120         NTSTATUS status;
 121         struct iovec *iov;
 122         uint8_t *body;
 123         uint32_t tcon_id;
 124         uint8_t share_type;
 125         uint32_t share_flags;
 126         uint32_t share_capabilities;
 127         uint32_t maximal_access;
 128         static const struct smb2cli_req_expected_response expected[] = {
 129         {
 130                 .status = NT_STATUS_OK,
 131                 .body_size = 0x10
 132         }
 133         };
 134
 135         status = smb2cli_req_recv(subreq, state, &iov,
 136                                   expected, ARRAY_SIZE(expected));
 137         TALLOC_FREE(subreq);
 138         if (!NT_STATUS_IS_OK(status)) {
 139                 tevent_req_nterror(req, status);
 140                 return;
 141         }
 142
 143         tcon_id = IVAL(iov[0].iov_base, SMB2_HDR_TID);
 144
 145         body = (uint8_t *)iov[1].iov_base;
 146         share_type              = CVAL(body, 0x02);
 147         share_flags             = IVAL(body, 0x04);
 148         share_capabilities      = IVAL(body, 0x08);
 149         maximal_access          = IVAL(body, 0x0C);
 150
 151         smb2cli_tcon_set_values(state->tcon,
 152                                 state->session,
 153                                 tcon_id,
 154                                 share_type,
 155                                 share_flags,
 156                                 share_capabilities,
 157                                 maximal_access);
 158
 159         if (!smbXcli_session_is_authenticated(state->session)) {
 160                 tevent_req_done(req);
 161                 return;
 162         }
 163
 164         if (smbXcli_conn_protocol(state->conn) >= PROTOCOL_SMB3_10) {
 165                 tevent_req_done(req);
 166                 return;
 167         }
 168
 169         subreq = smb2cli_validate_negotiate_info_send(state, state->ev,
 170                                                       state->conn,
 171                                                       state->timeout_msec,
 172                                                       state->session,
 173                                                       state->tcon);
 174         if (tevent_req_nomem(subreq, req)) {
 175                 return;
 176         }
 177         tevent_req_set_callback(subreq, smb2cli_tcon_validate, req);
 178 }
 179
 180 static void smb2cli_tcon_validate(struct tevent_req *subreq)
 181 {
 182         struct tevent_req *req = tevent_req_callback_data(
 183                 subreq, struct tevent_req);
 184         struct smb2cli_tcon_state *state = tevent_req_data(
 185                 req, struct smb2cli_tcon_state);
 186         NTSTATUS status;
 187
 188         status = smb2cli_validate_negotiate_info_recv(subreq);
 189         TALLOC_FREE(subreq);
 190         if (!NT_STATUS_IS_OK(status)) {
 191                 smb2cli_tcon_set_values(state->tcon, NULL,
 192                                         UINT32_MAX, 0, 0, 0, 0);
 193                 tevent_req_nterror(req, status);
 194                 return;
 195         }
 196
 197         tevent_req_done(req);
 198 }
 199
 200 NTSTATUS smb2cli_tcon_recv(struct tevent_req *req)
 201 {
 202         return tevent_req_simple_recv_ntstatus(req);
 203 }
 204
 205 NTSTATUS smb2cli_tcon(struct smbXcli_conn *conn,
 206                       uint32_t timeout_msec,
 207                       struct smbXcli_session *session,
 208                       struct smbXcli_tcon *tcon,
 209                       uint16_t flags,
 210                       const char *unc)
 211 {
 212         TALLOC_CTX *frame = talloc_stackframe();
 213         struct tevent_context *ev;
 214         struct tevent_req *req;
 215         NTSTATUS status = NT_STATUS_NO_MEMORY;
 216
 217         if (smbXcli_conn_has_async_calls(conn)) {
 218                 /*
 219                  * Can't use sync call while an async call is in flight
 220                  */
 221                 status = NT_STATUS_INVALID_PARAMETER;
 222                 goto fail;
 223         }
 224         ev = samba_tevent_context_init(frame);
 225         if (ev == NULL) {
 226                 goto fail;
 227         }
 228         req = smb2cli_tcon_send(frame, ev, conn,
 229                                 timeout_msec, session, tcon,
 230                                 flags, unc);
 231         if (req == NULL) {
 232                 goto fail;
 233         }
 234         if (!tevent_req_poll_ntstatus(req, ev, &status)) {
 235                 goto fail;
 236         }
 237         status = smb2cli_tcon_recv(req);
 238  fail:
 239         TALLOC_FREE(frame);
 240         return status;
 241 }
 242
 243 struct smb2cli_tdis_state {
 244         struct smbXcli_tcon *tcon;
 245         uint8_t fixed[4];
 246 };
 247
 248 static void smb2cli_tdis_done(struct tevent_req *subreq);
 249
 250 struct tevent_req *smb2cli_tdis_send(TALLOC_CTX *mem_ctx,
 251                                      struct tevent_context *ev,
 252                                      struct smbXcli_conn *conn,
 253                                      uint32_t timeout_msec,
 254                                      struct smbXcli_session *session,
 255                                      struct smbXcli_tcon *tcon)
 256 {
 257         struct tevent_req *req, *subreq;
 258         struct smb2cli_tdis_state *state;
 259
 260         req = tevent_req_create(mem_ctx, &state,
 261                                 struct smb2cli_tdis_state);
 262         if (req == NULL) {
 263                 return NULL;
 264         }
 265         state->tcon = tcon;
 266
 267         SSVAL(state->fixed, 0, 4);
 268
 269         subreq = smb2cli_req_send(state, ev, conn, SMB2_OP_TDIS,
 270                                   0, 0, /* flags */
 271                                   timeout_msec,
 272                                   tcon, session,
 273                                   state->fixed, sizeof(state->fixed),
 274                                   NULL, 0, /* dyn* */
 275                                   0); /* max_dyn_len */
 276         if (tevent_req_nomem(subreq, req)) {
 277                 return tevent_req_post(req, ev);
 278         }
 279         tevent_req_set_callback(subreq, smb2cli_tdis_done, req);
 280         return req;
 281 }
 282
 283 static void smb2cli_tdis_done(struct tevent_req *subreq)
 284 {
 285         struct tevent_req *req =
 286                 tevent_req_callback_data(subreq,
 287                 struct tevent_req);
 288         struct smb2cli_tdis_state *state =
 289                 tevent_req_data(req,
 290                 struct smb2cli_tdis_state);
 291         NTSTATUS status;
 292         static const struct smb2cli_req_expected_response expected[] = {
 293         {
 294                 .status = NT_STATUS_OK,
 295                 .body_size = 0x04
 296         }
 297         };
 298
 299         status = smb2cli_req_recv(subreq, NULL, NULL,
 300                                   expected, ARRAY_SIZE(expected));
 301         TALLOC_FREE(subreq);
 302         if (tevent_req_nterror(req, status)) {
 303                 return;
 304         }
 305         smb2cli_tcon_set_values(state->tcon, NULL,
 306                                 UINT32_MAX, 0, 0, 0, 0);
 307         tevent_req_done(req);
 308 }
 309
 310 NTSTATUS smb2cli_tdis_recv(struct tevent_req *req)
 311 {
 312         return tevent_req_simple_recv_ntstatus(req);
 313 }
 314
 315 NTSTATUS smb2cli_tdis(struct smbXcli_conn *conn,
 316                       uint32_t timeout_msec,
 317                       struct smbXcli_session *session,
 318                       struct smbXcli_tcon *tcon)
 319 {
 320         TALLOC_CTX *frame = talloc_stackframe();
 321         struct tevent_context *ev;
 322         struct tevent_req *req;
 323         NTSTATUS status = NT_STATUS_NO_MEMORY;
 324
 325         if (smbXcli_conn_has_async_calls(conn)) {
 326                 /*
 327                  * Can't use sync call while an async call is in flight
 328                  */
 329                 status = NT_STATUS_INVALID_PARAMETER;
 330                 goto fail;
 331         }
 332         ev = samba_tevent_context_init(frame);
 333         if (ev == NULL) {
 334                 goto fail;
 335         }
 336         req = smb2cli_tdis_send(frame, ev, conn,
 337                                 timeout_msec, session, tcon);
 338         if (req == NULL) {
 339                 goto fail;
 340         }
 341         if (!tevent_req_poll_ntstatus(req, ev, &status)) {
 342                 goto fail;
 343         }
 344         status = smb2cli_tdis_recv(req);
 345  fail:
 346         TALLOC_FREE(frame);
 347         return status;
 348 }