source4/libcli/smb2/connect.c

   1 /*
   2    Unix SMB/CIFS implementation.
   3
   4    SMB2 composite connection setup
   5
   6    Copyright (C) Andrew Tridgell 2005
   7
   8    This program is free software; you can redistribute it and/or modify
   9    it under the terms of the GNU General Public License as published by
  10    the Free Software Foundation; either version 3 of the License, or
  11    (at your option) any later version.
  12
  13    This program is distributed in the hope that it will be useful,
  14    but WITHOUT ANY WARRANTY; without even the implied warranty of
  15    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16    GNU General Public License for more details.
  17
  18    You should have received a copy of the GNU General Public License
  19    along with this program.  If not, see <http://www.gnu.org/licenses/>.
  20 */
  21
  22 #include "includes.h"
  23 #include <tevent.h>
  24 #include "lib/util/tevent_ntstatus.h"
  25 #include "libcli/raw/libcliraw.h"
  26 #include "libcli/raw/raw_proto.h"
  27 #include "libcli/smb2/smb2.h"
  28 #include "libcli/smb2/smb2_calls.h"
  29 #include "libcli/composite/composite.h"
  30 #include "libcli/resolve/resolve.h"
  31 #include "param/param.h"
  32 #include "auth/credentials/credentials.h"
  33 #include "../libcli/smb/smbXcli_base.h"
  34
  35 struct smb2_connect_state {
  36         struct tevent_context *ev;
  37         struct cli_credentials *credentials;
  38         uint64_t previous_session_id;
  39         struct resolve_context *resolve_ctx;
  40         const char *host;
  41         const char *share;
  42         const char *unc;
  43         const char **ports;
  44         const char *socket_options;
  45         struct nbt_name calling, called;
  46         struct gensec_settings *gensec_settings;
  47         struct smbcli_options options;
  48         struct smb2_transport *transport;
  49         struct smb2_session *session;
  50         struct smb2_tree *tree;
  51 };
  52
  53 static void smb2_connect_socket_done(struct composite_context *creq);
  54
  55 /*
  56   a composite function that does a full negprot/sesssetup/tcon, returning
  57   a connected smb2_tree
  58  */
  59 struct tevent_req *smb2_connect_send(TALLOC_CTX *mem_ctx,
  60                                      struct tevent_context *ev,
  61                                      const char *host,
  62                                      const char **ports,
  63                                      const char *share,
  64                                      struct resolve_context *resolve_ctx,
  65                                      struct cli_credentials *credentials,
  66                                      uint64_t previous_session_id,
  67                                      const struct smbcli_options *options,
  68                                      const char *socket_options,
  69                                      struct gensec_settings *gensec_settings)
  70 {
  71         struct tevent_req *req;
  72         struct smb2_connect_state *state;
  73         struct composite_context *creq;
  74         static const char *default_ports[] = { "445", "139", NULL };
  75
  76         req = tevent_req_create(mem_ctx, &state,
  77                                 struct smb2_connect_state);
  78         if (req == NULL) {
  79                 return NULL;
  80         }
  81
  82         state->ev = ev;
  83         state->credentials = credentials;
  84         state->previous_session_id = previous_session_id;
  85         state->options = *options;
  86         state->host = host;
  87         state->ports = ports;
  88         state->share = share;
  89         state->resolve_ctx = resolve_ctx;
  90         state->socket_options = socket_options;
  91         state->gensec_settings = gensec_settings;
  92
  93         if (state->ports == NULL) {
  94                 state->ports = default_ports;
  95         }
  96
  97         make_nbt_name_client(&state->calling,
  98                              cli_credentials_get_workstation(credentials));
  99
 100         nbt_choose_called_name(state, &state->called,
 101                                host, NBT_NAME_SERVER);
 102
 103         state->unc = talloc_asprintf(state, "\\\\%s\\%s",
 104                                     state->host, state->share);
 105         if (tevent_req_nomem(state->unc, req)) {
 106                 return tevent_req_post(req, ev);
 107         }
 108
 109         creq = smbcli_sock_connect_send(state, NULL, state->ports,
 110                                         state->host, state->resolve_ctx,
 111                                         state->ev, state->socket_options,
 112                                         &state->calling,
 113                                         &state->called);
 114         if (tevent_req_nomem(creq, req)) {
 115                 return tevent_req_post(req, ev);
 116         }
 117         creq->async.fn = smb2_connect_socket_done;
 118         creq->async.private_data = req;
 119
 120         return req;
 121 }
 122
 123 static void smb2_connect_negprot_done(struct tevent_req *subreq);
 124
 125 static void smb2_connect_socket_done(struct composite_context *creq)
 126 {
 127         struct tevent_req *req =
 128                 talloc_get_type_abort(creq->async.private_data,
 129                 struct tevent_req);
 130         struct smb2_connect_state *state =
 131                 tevent_req_data(req,
 132                 struct smb2_connect_state);
 133         struct smbcli_socket *sock;
 134         struct tevent_req *subreq;
 135         NTSTATUS status;
 136         uint32_t timeout_msec;
 137         enum protocol_types min_protocol;
 138
 139         status = smbcli_sock_connect_recv(creq, state, &sock);
 140         if (tevent_req_nterror(req, status)) {
 141                 return;
 142         }
 143
 144         state->transport = smb2_transport_init(sock, state, &state->options);
 145         if (tevent_req_nomem(state->transport, req)) {
 146                 return;
 147         }
 148
 149         timeout_msec = state->transport->options.request_timeout * 1000;
 150         min_protocol = state->transport->options.min_protocol;
 151         if (min_protocol < PROTOCOL_SMB2_02) {
 152                 min_protocol = PROTOCOL_SMB2_02;
 153         }
 154
 155         subreq = smbXcli_negprot_send(state, state->ev,
 156                                       state->transport->conn, timeout_msec,
 157                                       min_protocol,
 158                                       state->transport->options.max_protocol,
 159                                       state->transport->options.max_credits);
 160         if (tevent_req_nomem(subreq, req)) {
 161                 return;
 162         }
 163         tevent_req_set_callback(subreq, smb2_connect_negprot_done, req);
 164 }
 165
 166 static void smb2_connect_session_done(struct tevent_req *subreq);
 167
 168 static void smb2_connect_negprot_done(struct tevent_req *subreq)
 169 {
 170         struct tevent_req *req =
 171                 tevent_req_callback_data(subreq,
 172                 struct tevent_req);
 173         struct smb2_connect_state *state =
 174                 tevent_req_data(req,
 175                 struct smb2_connect_state);
 176         struct smb2_transport *transport = state->transport;
 177         NTSTATUS status;
 178
 179         status = smbXcli_negprot_recv(subreq);
 180         TALLOC_FREE(subreq);
 181         if (tevent_req_nterror(req, status)) {
 182                 return;
 183         }
 184
 185         state->session = smb2_session_init(transport, state->gensec_settings, state);
 186         if (tevent_req_nomem(state->session, req)) {
 187                 return;
 188         }
 189
 190         subreq = smb2_session_setup_spnego_send(state, state->ev,
 191                                                 state->session,
 192                                                 state->credentials,
 193                                                 state->previous_session_id);
 194         if (tevent_req_nomem(subreq, req)) {
 195                 return;
 196         }
 197         tevent_req_set_callback(subreq, smb2_connect_session_done, req);
 198 }
 199
 200 static void smb2_connect_tcon_done(struct tevent_req *subreq);
 201
 202 static void smb2_connect_session_done(struct tevent_req *subreq)
 203 {
 204         struct tevent_req *req =
 205                 tevent_req_callback_data(subreq,
 206                 struct tevent_req);
 207         struct smb2_connect_state *state =
 208                 tevent_req_data(req,
 209                 struct smb2_connect_state);
 210         NTSTATUS status;
 211         uint32_t timeout_msec;
 212
 213         status = smb2_session_setup_spnego_recv(subreq);
 214         TALLOC_FREE(subreq);
 215         if (tevent_req_nterror(req, status)) {
 216                 return;
 217         }
 218
 219         state->tree = smb2_tree_init(state->session, state, true);
 220         if (tevent_req_nomem(state->tree, req)) {
 221                 return;
 222         }
 223
 224         timeout_msec = state->transport->options.request_timeout * 1000;
 225
 226         subreq = smb2cli_tcon_send(state, state->ev,
 227                                    state->transport->conn,
 228                                    timeout_msec,
 229                                    state->session->smbXcli,
 230                                    state->tree->smbXcli,
 231                                    0, /* flags */
 232                                    state->unc);
 233         if (tevent_req_nomem(subreq, req)) {
 234                 return;
 235         }
 236         tevent_req_set_callback(subreq, smb2_connect_tcon_done, req);
 237 }
 238
 239 static void smb2_connect_tcon_done(struct tevent_req *subreq)
 240 {
 241         struct tevent_req *req =
 242                 tevent_req_callback_data(subreq,
 243                 struct tevent_req);
 244         NTSTATUS status;
 245
 246         status = smb2cli_tcon_recv(subreq);
 247         if (tevent_req_nterror(req, status)) {
 248                 return;
 249         }
 250
 251         tevent_req_done(req);
 252 }
 253
 254 NTSTATUS smb2_connect_recv(struct tevent_req *req,
 255                            TALLOC_CTX *mem_ctx,
 256                            struct smb2_tree **tree)
 257 {
 258         struct smb2_connect_state *state =
 259                 tevent_req_data(req,
 260                 struct smb2_connect_state);
 261         NTSTATUS status;
 262
 263         if (tevent_req_is_nterror(req, &status)) {
 264                 tevent_req_received(req);
 265                 return status;
 266         }
 267
 268         *tree = talloc_move(mem_ctx, &state->tree);
 269
 270         tevent_req_received(req);
 271         return NT_STATUS_OK;
 272 }
 273
 274 /*
 275   sync version of smb2_connect
 276 */
 277 NTSTATUS smb2_connect_ext(TALLOC_CTX *mem_ctx,
 278                           const char *host,
 279                           const char **ports,
 280                           const char *share,
 281                           struct resolve_context *resolve_ctx,
 282                           struct cli_credentials *credentials,
 283                           uint64_t previous_session_id,
 284                           struct smb2_tree **tree,
 285                           struct tevent_context *ev,
 286                           const struct smbcli_options *options,
 287                           const char *socket_options,
 288                           struct gensec_settings *gensec_settings)
 289 {
 290         struct tevent_req *subreq;
 291         NTSTATUS status;
 292         bool ok;
 293         TALLOC_CTX *frame = talloc_stackframe();
 294
 295         if (frame == NULL) {
 296                 return NT_STATUS_NO_MEMORY;
 297         }
 298
 299         subreq = smb2_connect_send(frame,
 300                                    ev,
 301                                    host,
 302                                    ports,
 303                                    share,
 304                                    resolve_ctx,
 305                                    credentials,
 306                                    previous_session_id,
 307                                    options,
 308                                    socket_options,
 309                                    gensec_settings);
 310         if (subreq == NULL) {
 311                 TALLOC_FREE(frame);
 312                 return NT_STATUS_NO_MEMORY;
 313         }
 314
 315         ok = tevent_req_poll(subreq, ev);
 316         if (!ok) {
 317                 status = map_nt_error_from_unix_common(errno);
 318                 TALLOC_FREE(frame);
 319                 return status;
 320         }
 321
 322         status = smb2_connect_recv(subreq, mem_ctx, tree);
 323         TALLOC_FREE(subreq);
 324         if (!NT_STATUS_IS_OK(status)) {
 325                 TALLOC_FREE(frame);
 326                 return status;
 327         }
 328
 329         TALLOC_FREE(frame);
 330         return NT_STATUS_OK;
 331 }
 332
 333 NTSTATUS smb2_connect(TALLOC_CTX *mem_ctx,
 334                       const char *host,
 335                       const char **ports,
 336                       const char *share,
 337                       struct resolve_context *resolve_ctx,
 338                       struct cli_credentials *credentials,
 339                       struct smb2_tree **tree,
 340                       struct tevent_context *ev,
 341                       struct smbcli_options *options,
 342                       const char *socket_options,
 343                       struct gensec_settings *gensec_settings)
 344 {
 345         NTSTATUS status;
 346
 347         status = smb2_connect_ext(mem_ctx, host, ports, share, resolve_ctx,
 348                                   credentials,
 349                                   0, /* previous_session_id */
 350                                   tree, ev, options, socket_options,
 351                                   gensec_settings);
 352
 353         return status;
 354 }