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 "smb2cli_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), cli_state_remote_sockaddr(cli));
  56
  57         tcon_share = talloc_asprintf(talloc_tos(), "\\\\%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, SMB2_OP_TCON,
  85                                   0, 0, /* flags */
  86                                   cli->timeout,
  87                                   cli->smb2.pid,
  88                                   0, /* tid */
  89                                   cli->smb2.uid,
  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         static const struct smb2cli_req_expected_response expected[] = {
 110         {
 111                 .status = NT_STATUS_OK,
 112                 .body_size = 0x10
 113         }
 114         };
 115
 116         status = smb2cli_req_recv(subreq, talloc_tos(), &iov,
 117                                   expected, ARRAY_SIZE(expected));
 118         if (!NT_STATUS_IS_OK(status)) {
 119                 TALLOC_FREE(subreq);
 120                 tevent_req_nterror(req, status);
 121                 return;
 122         }
 123
 124         cli->smb2.tid = IVAL(iov[0].iov_base, SMB2_HDR_TID);
 125
 126         body = (uint8_t *)iov[1].iov_base;
 127         cli->smb2.share_type            = CVAL(body, 2);
 128         cli->smb2.share_flags           = IVAL(body, 4);
 129         cli->smb2.share_capabilities    = IVAL(body, 8);
 130         cli->smb2.maximal_access        = IVAL(body, 12);
 131
 132         TALLOC_FREE(subreq);
 133         tevent_req_done(req);
 134 }
 135
 136 NTSTATUS smb2cli_tcon_recv(struct tevent_req *req)
 137 {
 138         return tevent_req_simple_recv_ntstatus(req);
 139 }
 140
 141 NTSTATUS smb2cli_tcon(struct cli_state *cli, const char *share)
 142 {
 143         TALLOC_CTX *frame = talloc_stackframe();
 144         struct event_context *ev;
 145         struct tevent_req *req;
 146         NTSTATUS status = NT_STATUS_NO_MEMORY;
 147
 148         if (cli_has_async_calls(cli)) {
 149                 /*
 150                  * Can't use sync call while an async call is in flight
 151                  */
 152                 status = NT_STATUS_INVALID_PARAMETER;
 153                 goto fail;
 154         }
 155         ev = event_context_init(frame);
 156         if (ev == NULL) {
 157                 goto fail;
 158         }
 159         req = smb2cli_tcon_send(frame, ev, cli, share);
 160         if (req == NULL) {
 161                 goto fail;
 162         }
 163         if (!tevent_req_poll_ntstatus(req, ev, &status)) {
 164                 goto fail;
 165         }
 166         status = smb2cli_tcon_recv(req);
 167  fail:
 168         TALLOC_FREE(frame);
 169         return status;
 170 }
 171
 172 struct smb2cli_tdis_state {
 173         uint8_t fixed[4];
 174 };
 175
 176 static void smb2cli_tdis_done(struct tevent_req *subreq);
 177
 178 struct tevent_req *smb2cli_tdis_send(TALLOC_CTX *mem_ctx,
 179                                       struct tevent_context *ev,
 180                                       struct cli_state *cli)
 181 {
 182         struct tevent_req *req, *subreq;
 183         struct smb2cli_tdis_state *state;
 184
 185         req = tevent_req_create(mem_ctx, &state,
 186                                 struct smb2cli_tdis_state);
 187         if (req == NULL) {
 188                 return NULL;
 189         }
 190         SSVAL(state->fixed, 0, 4);
 191
 192         subreq = smb2cli_req_send(state, ev, cli, SMB2_OP_TDIS,
 193                                   0, 0, /* flags */
 194                                   cli->timeout,
 195                                   cli->smb2.pid,
 196                                   cli->smb2.tid,
 197                                   cli->smb2.uid,
 198                                   state->fixed, sizeof(state->fixed),
 199                                   NULL, 0);
 200         if (tevent_req_nomem(subreq, req)) {
 201                 return tevent_req_post(req, ev);
 202         }
 203         tevent_req_set_callback(subreq, smb2cli_tdis_done, req);
 204         return req;
 205 }
 206
 207 static void smb2cli_tdis_done(struct tevent_req *subreq)
 208 {
 209         struct tevent_req *req =
 210                 tevent_req_callback_data(subreq,
 211                 struct tevent_req);
 212         NTSTATUS status;
 213         struct iovec *iov;
 214         static const struct smb2cli_req_expected_response expected[] = {
 215         {
 216                 .status = NT_STATUS_OK,
 217                 .body_size = 0x04
 218         }
 219         };
 220
 221         status = smb2cli_req_recv(subreq, talloc_tos(), &iov,
 222                                   expected, ARRAY_SIZE(expected));
 223         TALLOC_FREE(subreq);
 224         if (tevent_req_nterror(req, status)) {
 225                 return;
 226         }
 227         tevent_req_done(req);
 228 }
 229
 230 NTSTATUS smb2cli_tdis_recv(struct tevent_req *req)
 231 {
 232         return tevent_req_simple_recv_ntstatus(req);
 233 }
 234
 235 NTSTATUS smb2cli_tdis(struct cli_state *cli)
 236 {
 237         TALLOC_CTX *frame = talloc_stackframe();
 238         struct event_context *ev;
 239         struct tevent_req *req;
 240         NTSTATUS status = NT_STATUS_NO_MEMORY;
 241
 242         if (cli_has_async_calls(cli)) {
 243                 /*
 244                  * Can't use sync call while an async call is in flight
 245                  */
 246                 status = NT_STATUS_INVALID_PARAMETER;
 247                 goto fail;
 248         }
 249         ev = event_context_init(frame);
 250         if (ev == NULL) {
 251                 goto fail;
 252         }
 253         req = smb2cli_tdis_send(frame, ev, cli);
 254         if (req == NULL) {
 255                 goto fail;
 256         }
 257         if (!tevent_req_poll_ntstatus(req, ev, &status)) {
 258                 goto fail;
 259         }
 260         status = smb2cli_tdis_recv(req);
 261  fail:
 262         TALLOC_FREE(frame);
 263         return status;
 264 }