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         char srv_ip[INET6_ADDRSTRLEN];
  45         const char *tcon_share;
  46         uint8_t *dyn;
  47         size_t dyn_len;
  48
  49         req = tevent_req_create(mem_ctx, &state, struct smb2cli_tcon_state);
  50         if (req == NULL) {
  51                 return NULL;
  52         }
  53         state->cli = cli;
  54
  55         print_sockaddr(srv_ip, sizeof(srv_ip), smbXcli_conn_remote_sockaddr(cli->conn));
  56
  57         tcon_share = talloc_asprintf(state, "\\\\%s\\%s",
  58                                      srv_ip, share);
  59         if (tevent_req_nomem(tcon_share, req)) {
  60                 return tevent_req_post(req, ev);
  61         }
  62         if (!convert_string_talloc(state, CH_UNIX, CH_UTF16,
  63                                    tcon_share, strlen(tcon_share),
  64                                    &dyn, &dyn_len)) {
  65                 tevent_req_oom(req);
  66                 return tevent_req_post(req, ev);
  67         }
  68
  69         if (strlen(tcon_share) == 0) {
  70                 TALLOC_FREE(dyn);
  71                 dyn_len = 0;
  72         }
  73
  74         fixed = state->fixed;
  75         SSVAL(fixed, 0, 9);
  76         SSVAL(fixed, 4, SMB2_HDR_BODY + 8);
  77         SSVAL(fixed, 6, dyn_len);
  78
  79         if (dyn_len == 0) {
  80                 dyn = state->dyn_pad;;
  81                 dyn_len = sizeof(state->dyn_pad);
  82         }
  83
  84         subreq = smb2cli_req_send(state, ev, cli->conn, SMB2_OP_TCON,
  85                                   0, 0, /* flags */
  86                                   cli->timeout,
  87                                   cli->smb2.pid,
  88                                   0, /* tid */
  89                                   cli->smb2.session,
  90                                   state->fixed, sizeof(state->fixed),
  91                                   dyn, dyn_len);
  92         if (tevent_req_nomem(subreq, req)) {
  93                 return tevent_req_post(req, ev);
  94         }
  95         tevent_req_set_callback(subreq, smb2cli_tcon_done, req);
  96         return req;
  97 }
  98
  99 static void smb2cli_tcon_done(struct tevent_req *subreq)
 100 {
 101         struct tevent_req *req = tevent_req_callback_data(
 102                 subreq, struct tevent_req);
 103         struct smb2cli_tcon_state *state = tevent_req_data(
 104                 req, struct smb2cli_tcon_state);
 105         struct cli_state *cli = state->cli;
 106         NTSTATUS status;
 107         struct iovec *iov;
 108         uint8_t *body;
 109         uint32_t tcon_id;
 110         static const struct smb2cli_req_expected_response expected[] = {
 111         {
 112                 .status = NT_STATUS_OK,
 113                 .body_size = 0x10
 114         }
 115         };
 116
 117         status = smb2cli_req_recv(subreq, state, &iov,
 118                                   expected, ARRAY_SIZE(expected));
 119         if (!NT_STATUS_IS_OK(status)) {
 120                 TALLOC_FREE(subreq);
 121                 tevent_req_nterror(req, status);
 122                 return;
 123         }
 124
 125         tcon_id = IVAL(iov[0].iov_base, SMB2_HDR_TID);
 126
 127         body = (uint8_t *)iov[1].iov_base;
 128         cli->smb2.share_type            = CVAL(body, 2);
 129         cli->smb2.share_flags           = IVAL(body, 4);
 130         cli->smb2.share_capabilities    = IVAL(body, 8);
 131         cli->smb2.maximal_access        = IVAL(body, 12);
 132
 133         TALLOC_FREE(subreq);
 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                                 tcon_id,
 142                                 cli->smb2.share_type,
 143                                 cli->smb2.share_flags,
 144                                 cli->smb2.share_capabilities,
 145                                 cli->smb2.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         uint32_t tcon_id = 0;
 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         if (cli->smb2.tcon) {
 210                 tcon_id = smb2cli_tcon_current_id(cli->smb2.tcon);
 211         }
 212
 213         subreq = smb2cli_req_send(state, ev, cli->conn, SMB2_OP_TDIS,
 214                                   0, 0, /* flags */
 215                                   cli->timeout,
 216                                   cli->smb2.pid,
 217                                   tcon_id,
 218                                   cli->smb2.session,
 219                                   state->fixed, sizeof(state->fixed),
 220                                   NULL, 0);
 221         if (tevent_req_nomem(subreq, req)) {
 222                 return tevent_req_post(req, ev);
 223         }
 224         tevent_req_set_callback(subreq, smb2cli_tdis_done, req);
 225         return req;
 226 }
 227
 228 static void smb2cli_tdis_done(struct tevent_req *subreq)
 229 {
 230         struct tevent_req *req =
 231                 tevent_req_callback_data(subreq,
 232                 struct tevent_req);
 233         struct smb2cli_tdis_state *state =
 234                 tevent_req_data(req,
 235                 struct smb2cli_tdis_state);
 236         NTSTATUS status;
 237         static const struct smb2cli_req_expected_response expected[] = {
 238         {
 239                 .status = NT_STATUS_OK,
 240                 .body_size = 0x04
 241         }
 242         };
 243
 244         status = smb2cli_req_recv(subreq, NULL, NULL,
 245                                   expected, ARRAY_SIZE(expected));
 246         TALLOC_FREE(subreq);
 247         if (tevent_req_nterror(req, status)) {
 248                 return;
 249         }
 250         TALLOC_FREE(state->cli->smb2.tcon);
 251         tevent_req_done(req);
 252 }
 253
 254 NTSTATUS smb2cli_tdis_recv(struct tevent_req *req)
 255 {
 256         return tevent_req_simple_recv_ntstatus(req);
 257 }
 258
 259 NTSTATUS smb2cli_tdis(struct cli_state *cli)
 260 {
 261         TALLOC_CTX *frame = talloc_stackframe();
 262         struct tevent_context *ev;
 263         struct tevent_req *req;
 264         NTSTATUS status = NT_STATUS_NO_MEMORY;
 265
 266         if (smbXcli_conn_has_async_calls(cli->conn)) {
 267                 /*
 268                  * Can't use sync call while an async call is in flight
 269                  */
 270                 status = NT_STATUS_INVALID_PARAMETER;
 271                 goto fail;
 272         }
 273         ev = tevent_context_init(frame);
 274         if (ev == NULL) {
 275                 goto fail;
 276         }
 277         req = smb2cli_tdis_send(frame, ev, cli);
 278         if (req == NULL) {
 279                 goto fail;
 280         }
 281         if (!tevent_req_poll_ntstatus(req, ev, &status)) {
 282                 goto fail;
 283         }
 284         status = smb2cli_tdis_recv(req);
 285  fail:
 286         TALLOC_FREE(frame);
 287         return status;
 288 }