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