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 };
  32
  33 static void smb2cli_tcon_done(struct tevent_req *subreq);
  34
  35 struct tevent_req *smb2cli_tcon_send(TALLOC_CTX *mem_ctx,
  36                                      struct tevent_context *ev,
  37                                      struct cli_state *cli,
  38                                      const char *share)
  39 {
  40         struct tevent_req *req, *subreq;
  41         struct smb2cli_tcon_state *state;
  42         uint8_t *fixed;
  43         char srv_ip[INET6_ADDRSTRLEN];
  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         print_sockaddr(srv_ip, sizeof(srv_ip), cli_state_remote_sockaddr(cli));
  55
  56         tcon_share = talloc_asprintf(talloc_tos(), "\\\\%s\\%s",
  57                                      srv_ip, share);
  58         if (tevent_req_nomem(tcon_share, req)) {
  59                 return tevent_req_post(req, ev);
  60         }
  61         if (!convert_string_talloc(state, CH_UNIX, CH_UTF16,
  62                                    tcon_share, talloc_get_size(tcon_share),
  63                                    &dyn, &dyn_len)) {
  64                 tevent_req_oom(req);
  65                 return tevent_req_post(req, ev);
  66         }
  67
  68         fixed = state->fixed;
  69         SSVAL(fixed, 0, 9);
  70         SSVAL(fixed, 4, SMB2_HDR_BODY + 8);
  71         SSVAL(fixed, 6, dyn_len);
  72
  73         subreq = smb2cli_req_send(state, ev, cli, SMB2_OP_TCON, 0,
  74                                   state->fixed, sizeof(state->fixed),
  75                                   dyn, dyn_len);
  76         if (tevent_req_nomem(subreq, req)) {
  77                 return tevent_req_post(req, ev);
  78         }
  79         tevent_req_set_callback(subreq, smb2cli_tcon_done, req);
  80         return req;
  81 }
  82
  83 static void smb2cli_tcon_done(struct tevent_req *subreq)
  84 {
  85         struct tevent_req *req = tevent_req_callback_data(
  86                 subreq, struct tevent_req);
  87         struct smb2cli_tcon_state *state = tevent_req_data(
  88                 req, struct smb2cli_tcon_state);
  89         struct cli_state *cli = state->cli;
  90         NTSTATUS status;
  91         struct iovec *iov;
  92         uint8_t *body;
  93
  94         status = smb2cli_req_recv(subreq, talloc_tos(), &iov, 16);
  95         if (!NT_STATUS_IS_OK(status)) {
  96                 TALLOC_FREE(subreq);
  97                 tevent_req_nterror(req, status);
  98                 return;
  99         }
 100
 101         cli->smb2.tid = IVAL(iov[0].iov_base, SMB2_HDR_TID);
 102
 103         body = (uint8_t *)iov[1].iov_base;
 104         cli->smb2.share_type            = CVAL(body, 2);
 105         cli->smb2.share_flags           = IVAL(body, 4);
 106         cli->capabilities               = IVAL(body, 8);
 107         cli->smb2.maximal_access        = IVAL(body, 12);
 108
 109         TALLOC_FREE(subreq);
 110         tevent_req_done(req);
 111 }
 112
 113 NTSTATUS smb2cli_tcon_recv(struct tevent_req *req)
 114 {
 115         return tevent_req_simple_recv_ntstatus(req);
 116 }
 117
 118 NTSTATUS smb2cli_tcon(struct cli_state *cli, const char *share)
 119 {
 120         TALLOC_CTX *frame = talloc_stackframe();
 121         struct event_context *ev;
 122         struct tevent_req *req;
 123         NTSTATUS status = NT_STATUS_NO_MEMORY;
 124
 125         if (cli_has_async_calls(cli)) {
 126                 /*
 127                  * Can't use sync call while an async call is in flight
 128                  */
 129                 status = NT_STATUS_INVALID_PARAMETER;
 130                 goto fail;
 131         }
 132         ev = event_context_init(frame);
 133         if (ev == NULL) {
 134                 goto fail;
 135         }
 136         req = smb2cli_tcon_send(frame, ev, cli, share);
 137         if (req == NULL) {
 138                 goto fail;
 139         }
 140         if (!tevent_req_poll_ntstatus(req, ev, &status)) {
 141                 goto fail;
 142         }
 143         status = smb2cli_tcon_recv(req);
 144  fail:
 145         TALLOC_FREE(frame);
 146         return status;
 147 }
 148
 149 struct smb2cli_tdis_state {
 150         uint8_t fixed[4];
 151 };
 152
 153 static void smb2cli_tdis_done(struct tevent_req *subreq);
 154
 155 struct tevent_req *smb2cli_tdis_send(TALLOC_CTX *mem_ctx,
 156                                       struct tevent_context *ev,
 157                                       struct cli_state *cli)
 158 {
 159         struct tevent_req *req, *subreq;
 160         struct smb2cli_tdis_state *state;
 161
 162         req = tevent_req_create(mem_ctx, &state,
 163                                 struct smb2cli_tdis_state);
 164         if (req == NULL) {
 165                 return NULL;
 166         }
 167         SSVAL(state->fixed, 0, 4);
 168
 169         subreq = smb2cli_req_send(state, ev, cli, SMB2_OP_TDIS, 0,
 170                                   state->fixed, sizeof(state->fixed),
 171                                   NULL, 0);
 172         if (tevent_req_nomem(subreq, req)) {
 173                 return tevent_req_post(req, ev);
 174         }
 175         tevent_req_set_callback(subreq, smb2cli_tdis_done, req);
 176         return req;
 177 }
 178
 179 static void smb2cli_tdis_done(struct tevent_req *subreq)
 180 {
 181         struct tevent_req *req =
 182                 tevent_req_callback_data(subreq,
 183                 struct tevent_req);
 184         NTSTATUS status;
 185         struct iovec *iov;
 186
 187         status = smb2cli_req_recv(subreq, talloc_tos(), &iov, 4);
 188         TALLOC_FREE(subreq);
 189         if (tevent_req_nterror(req, status)) {
 190                 return;
 191         }
 192         tevent_req_done(req);
 193 }
 194
 195 NTSTATUS smb2cli_tdis_recv(struct tevent_req *req)
 196 {
 197         return tevent_req_simple_recv_ntstatus(req);
 198 }
 199
 200 NTSTATUS smb2cli_tdis(struct cli_state *cli)
 201 {
 202         TALLOC_CTX *frame = talloc_stackframe();
 203         struct event_context *ev;
 204         struct tevent_req *req;
 205         NTSTATUS status = NT_STATUS_NO_MEMORY;
 206
 207         if (cli_has_async_calls(cli)) {
 208                 /*
 209                  * Can't use sync call while an async call is in flight
 210                  */
 211                 status = NT_STATUS_INVALID_PARAMETER;
 212                 goto fail;
 213         }
 214         ev = event_context_init(frame);
 215         if (ev == NULL) {
 216                 goto fail;
 217         }
 218         req = smb2cli_tdis_send(frame, ev, cli);
 219         if (req == NULL) {
 220                 goto fail;
 221         }
 222         if (!tevent_req_poll_ntstatus(req, ev, &status)) {
 223                 goto fail;
 224         }
 225         status = smb2cli_tdis_recv(req);
 226  fail:
 227         TALLOC_FREE(frame);
 228         return status;
 229 }