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         if (tevent_req_nomem(subreq, req)) {
 160                 return;
 161         }
 162         tevent_req_set_callback(subreq, smb2_connect_negprot_done, req);
 163 }
 164
 165 static void smb2_connect_session_done(struct tevent_req *subreq);
 166
 167 static void smb2_connect_negprot_done(struct tevent_req *subreq)
 168 {
 169         struct tevent_req *req =
 170                 tevent_req_callback_data(subreq,
 171                 struct tevent_req);
 172         struct smb2_connect_state *state =
 173                 tevent_req_data(req,
 174                 struct smb2_connect_state);
 175         struct smb2_transport *transport = state->transport;
 176         NTSTATUS status;
 177
 178         status = smbXcli_negprot_recv(subreq);
 179         TALLOC_FREE(subreq);
 180         if (tevent_req_nterror(req, status)) {
 181                 return;
 182         }
 183
 184         /* This is a hack... */
 185         smb2cli_conn_set_max_credits(transport->conn, 30);
 186
 187         state->session = smb2_session_init(transport, state->gensec_settings, state);
 188         if (tevent_req_nomem(state->session, req)) {
 189                 return;
 190         }
 191
 192         subreq = smb2_session_setup_spnego_send(state, state->ev,
 193                                                 state->session,
 194                                                 state->credentials,
 195                                                 state->previous_session_id);
 196         if (tevent_req_nomem(subreq, req)) {
 197                 return;
 198         }
 199         tevent_req_set_callback(subreq, smb2_connect_session_done, req);
 200 }
 201
 202 static void smb2_connect_tcon_done(struct tevent_req *subreq);
 203
 204 static void smb2_connect_session_done(struct tevent_req *subreq)
 205 {
 206         struct tevent_req *req =
 207                 tevent_req_callback_data(subreq,
 208                 struct tevent_req);
 209         struct smb2_connect_state *state =
 210                 tevent_req_data(req,
 211                 struct smb2_connect_state);
 212         NTSTATUS status;
 213         uint32_t timeout_msec;
 214
 215         status = smb2_session_setup_spnego_recv(subreq);
 216         TALLOC_FREE(subreq);
 217         if (tevent_req_nterror(req, status)) {
 218                 return;
 219         }
 220
 221         state->tree = smb2_tree_init(state->session, state, true);
 222         if (tevent_req_nomem(state->tree, req)) {
 223                 return;
 224         }
 225
 226         timeout_msec = state->transport->options.request_timeout * 1000;
 227
 228         subreq = smb2cli_tcon_send(state, state->ev,
 229                                    state->transport->conn,
 230                                    timeout_msec,
 231                                    state->session->smbXcli,
 232                                    state->tree->smbXcli,
 233                                    0, /* flags */
 234                                    state->unc);
 235         if (tevent_req_nomem(subreq, req)) {
 236                 return;
 237         }
 238         tevent_req_set_callback(subreq, smb2_connect_tcon_done, req);
 239 }
 240
 241 static void smb2_connect_tcon_done(struct tevent_req *subreq)
 242 {
 243         struct tevent_req *req =
 244                 tevent_req_callback_data(subreq,
 245                 struct tevent_req);
 246         NTSTATUS status;
 247
 248         status = smb2cli_tcon_recv(subreq);
 249         if (tevent_req_nterror(req, status)) {
 250                 return;
 251         }
 252
 253         tevent_req_done(req);
 254 }
 255
 256 NTSTATUS smb2_connect_recv(struct tevent_req *req,
 257                            TALLOC_CTX *mem_ctx,
 258                            struct smb2_tree **tree)
 259 {
 260         struct smb2_connect_state *state =
 261                 tevent_req_data(req,
 262                 struct smb2_connect_state);
 263         NTSTATUS status;
 264
 265         if (tevent_req_is_nterror(req, &status)) {
 266                 tevent_req_received(req);
 267                 return status;
 268         }
 269
 270         *tree = talloc_move(mem_ctx, &state->tree);
 271
 272         tevent_req_received(req);
 273         return NT_STATUS_OK;
 274 }
 275
 276 /*
 277   sync version of smb2_connect
 278 */
 279 NTSTATUS smb2_connect_ext(TALLOC_CTX *mem_ctx,
 280                           const char *host,
 281                           const char **ports,
 282                           const char *share,
 283                           struct resolve_context *resolve_ctx,
 284                           struct cli_credentials *credentials,
 285                           uint64_t previous_session_id,
 286                           struct smb2_tree **tree,
 287                           struct tevent_context *ev,
 288                           const struct smbcli_options *options,
 289                           const char *socket_options,
 290                           struct gensec_settings *gensec_settings)
 291 {
 292         struct tevent_req *subreq;
 293         NTSTATUS status;
 294         bool ok;
 295         TALLOC_CTX *frame = talloc_stackframe();
 296
 297         if (frame == NULL) {
 298                 return NT_STATUS_NO_MEMORY;
 299         }
 300
 301         subreq = smb2_connect_send(frame,
 302                                    ev,
 303                                    host,
 304                                    ports,
 305                                    share,
 306                                    resolve_ctx,
 307                                    credentials,
 308                                    previous_session_id,
 309                                    options,
 310                                    socket_options,
 311                                    gensec_settings);
 312         if (subreq == NULL) {
 313                 TALLOC_FREE(frame);
 314                 return NT_STATUS_NO_MEMORY;
 315         }
 316
 317         ok = tevent_req_poll(subreq, ev);
 318         if (!ok) {
 319                 status = map_nt_error_from_unix_common(errno);
 320                 TALLOC_FREE(frame);
 321                 return status;
 322         }
 323
 324         status = smb2_connect_recv(subreq, mem_ctx, tree);
 325         TALLOC_FREE(subreq);
 326         if (!NT_STATUS_IS_OK(status)) {
 327                 TALLOC_FREE(frame);
 328                 return status;
 329         }
 330
 331         TALLOC_FREE(frame);
 332         return NT_STATUS_OK;
 333 }
 334
 335 NTSTATUS smb2_connect(TALLOC_CTX *mem_ctx,
 336                       const char *host,
 337                       const char **ports,
 338                       const char *share,
 339                       struct resolve_context *resolve_ctx,
 340                       struct cli_credentials *credentials,
 341                       struct smb2_tree **tree,
 342                       struct tevent_context *ev,
 343                       struct smbcli_options *options,
 344                       const char *socket_options,
 345                       struct gensec_settings *gensec_settings)
 346 {
 347         NTSTATUS status;
 348
 349         status = smb2_connect_ext(mem_ctx, host, ports, share, resolve_ctx,
 350                                   credentials,
 351                                   0, /* previous_session_id */
 352                                   tree, ev, options, socket_options,
 353                                   gensec_settings);
 354
 355         return status;
 356 }