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 **ports;
  43         const char *socket_options;
  44         struct nbt_name calling, called;
  45         struct gensec_settings *gensec_settings;
  46         struct smbcli_options options;
  47         struct smb2_transport *transport;
  48         struct smb2_tree_connect tcon;
  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         creq = smbcli_sock_connect_send(state, NULL, state->ports,
 104                                         state->host, state->resolve_ctx,
 105                                         state->ev, state->socket_options,
 106                                         &state->calling,
 107                                         &state->called);
 108         if (tevent_req_nomem(creq, req)) {
 109                 return tevent_req_post(req, ev);
 110         }
 111         creq->async.fn = smb2_connect_socket_done;
 112         creq->async.private_data = req;
 113
 114         return req;
 115 }
 116
 117 static void smb2_connect_negprot_done(struct tevent_req *subreq);
 118
 119 static void smb2_connect_socket_done(struct composite_context *creq)
 120 {
 121         struct tevent_req *req =
 122                 talloc_get_type_abort(creq->async.private_data,
 123                 struct tevent_req);
 124         struct smb2_connect_state *state =
 125                 tevent_req_data(req,
 126                 struct smb2_connect_state);
 127         struct smbcli_socket *sock;
 128         struct tevent_req *subreq;
 129         NTSTATUS status;
 130         uint32_t timeout_msec;
 131
 132         status = smbcli_sock_connect_recv(creq, state, &sock);
 133         if (tevent_req_nterror(req, status)) {
 134                 return;
 135         }
 136
 137         state->transport = smb2_transport_init(sock, state, &state->options);
 138         if (tevent_req_nomem(state->transport, req)) {
 139                 return;
 140         }
 141
 142         timeout_msec = state->transport->options.request_timeout * 1000;
 143
 144         subreq = smbXcli_negprot_send(state, state->ev,
 145                                       state->transport->conn, timeout_msec,
 146                                       PROTOCOL_SMB2_02, PROTOCOL_LATEST);
 147         if (tevent_req_nomem(subreq, req)) {
 148                 return;
 149         }
 150         tevent_req_set_callback(subreq, smb2_connect_negprot_done, req);
 151 }
 152
 153 static void smb2_connect_session_done(struct tevent_req *subreq);
 154
 155 static void smb2_connect_negprot_done(struct tevent_req *subreq)
 156 {
 157         struct tevent_req *req =
 158                 tevent_req_callback_data(subreq,
 159                 struct tevent_req);
 160         struct smb2_connect_state *state =
 161                 tevent_req_data(req,
 162                 struct smb2_connect_state);
 163         struct smb2_transport *transport = state->transport;
 164         NTSTATUS status;
 165
 166         status = smbXcli_negprot_recv(subreq);
 167         TALLOC_FREE(subreq);
 168         if (tevent_req_nterror(req, status)) {
 169                 return;
 170         }
 171
 172         /* This is a hack... */
 173         smb2cli_conn_set_max_credits(transport->conn, 30);
 174
 175         state->session = smb2_session_init(transport, state->gensec_settings, state, true);
 176         if (tevent_req_nomem(state->session, req)) {
 177                 return;
 178         }
 179
 180         subreq = smb2_session_setup_spnego_send(state, state->ev,
 181                                                 state->session,
 182                                                 state->credentials,
 183                                                 state->previous_session_id);
 184         if (tevent_req_nomem(subreq, req)) {
 185                 return;
 186         }
 187         tevent_req_set_callback(subreq, smb2_connect_session_done, req);
 188 }
 189
 190 static void smb2_connect_tcon_done(struct smb2_request *smb2req);
 191
 192 static void smb2_connect_session_done(struct tevent_req *subreq)
 193 {
 194         struct tevent_req *req =
 195                 tevent_req_callback_data(subreq,
 196                 struct tevent_req);
 197         struct smb2_connect_state *state =
 198                 tevent_req_data(req,
 199                 struct smb2_connect_state);
 200         struct smb2_request *smb2req;
 201         NTSTATUS status;
 202
 203         status = smb2_session_setup_spnego_recv(subreq);
 204         TALLOC_FREE(subreq);
 205         if (tevent_req_nterror(req, status)) {
 206                 return;
 207         }
 208
 209         state->tcon.in.reserved = 0;
 210         state->tcon.in.path     = talloc_asprintf(state, "\\\\%s\\%s",
 211                                                   state->host, state->share);
 212         if (tevent_req_nomem(state->tcon.in.path, req)) {
 213                 return;
 214         }
 215
 216         smb2req = smb2_tree_connect_send(state->session, &state->tcon);
 217         if (tevent_req_nomem(smb2req, req)) {
 218                 return;
 219         }
 220         smb2req->async.fn = smb2_connect_tcon_done;
 221         smb2req->async.private_data = req;
 222 }
 223
 224 static void smb2_connect_tcon_done(struct smb2_request *smb2req)
 225 {
 226         struct tevent_req *req =
 227                 talloc_get_type_abort(smb2req->async.private_data,
 228                 struct tevent_req);
 229         struct smb2_connect_state *state =
 230                 tevent_req_data(req,
 231                 struct smb2_connect_state);
 232         NTSTATUS status;
 233
 234         status = smb2_tree_connect_recv(smb2req, &state->tcon);
 235         if (tevent_req_nterror(req, status)) {
 236                 return;
 237         }
 238
 239         state->tree = smb2_tree_init(state->session, state, true);
 240         if (tevent_req_nomem(state->tree, req)) {
 241                 return;
 242         }
 243
 244         smb2cli_tcon_set_values(state->tree->smbXcli,
 245                                 state->session->smbXcli,
 246                                 state->tcon.out.tid,
 247                                 state->tcon.out.share_type,
 248                                 state->tcon.out.flags,
 249                                 state->tcon.out.capabilities,
 250                                 state->tcon.out.access_mask);
 251
 252         tevent_req_done(req);
 253 }
 254
 255 NTSTATUS smb2_connect_recv(struct tevent_req *req,
 256                            TALLOC_CTX *mem_ctx,
 257                            struct smb2_tree **tree)
 258 {
 259         struct smb2_connect_state *state =
 260                 tevent_req_data(req,
 261                 struct smb2_connect_state);
 262         NTSTATUS status;
 263
 264         if (tevent_req_is_nterror(req, &status)) {
 265                 tevent_req_received(req);
 266                 return status;
 267         }
 268
 269         *tree = talloc_move(mem_ctx, &state->tree);
 270
 271         tevent_req_received(req);
 272         return NT_STATUS_OK;
 273 }
 274
 275 /*
 276   sync version of smb2_connect
 277 */
 278 NTSTATUS smb2_connect_ext(TALLOC_CTX *mem_ctx,
 279                           const char *host,
 280                           const char **ports,
 281                           const char *share,
 282                           struct resolve_context *resolve_ctx,
 283                           struct cli_credentials *credentials,
 284                           uint64_t previous_session_id,
 285                           struct smb2_tree **tree,
 286                           struct tevent_context *ev,
 287                           const struct smbcli_options *options,
 288                           const char *socket_options,
 289                           struct gensec_settings *gensec_settings)
 290 {
 291         struct tevent_req *subreq;
 292         NTSTATUS status;
 293         bool ok;
 294         TALLOC_CTX *frame = talloc_stackframe();
 295
 296         if (frame == NULL) {
 297                 return NT_STATUS_NO_MEMORY;
 298         }
 299
 300         subreq = smb2_connect_send(frame,
 301                                    ev,
 302                                    host,
 303                                    ports,
 304                                    share,
 305                                    resolve_ctx,
 306                                    credentials,
 307                                    previous_session_id,
 308                                    options,
 309                                    socket_options,
 310                                    gensec_settings);
 311         if (subreq == NULL) {
 312                 TALLOC_FREE(frame);
 313                 return NT_STATUS_NO_MEMORY;
 314         }
 315
 316         ok = tevent_req_poll(subreq, ev);
 317         if (!ok) {
 318                 status = map_nt_error_from_unix_common(errno);
 319                 TALLOC_FREE(frame);
 320                 return status;
 321         }
 322
 323         status = smb2_connect_recv(subreq, mem_ctx, tree);
 324         TALLOC_FREE(subreq);
 325         if (!NT_STATUS_IS_OK(status)) {
 326                 TALLOC_FREE(frame);
 327                 return status;
 328         }
 329
 330         TALLOC_FREE(frame);
 331         return NT_STATUS_OK;
 332 }
 333
 334 NTSTATUS smb2_connect(TALLOC_CTX *mem_ctx,
 335                       const char *host,
 336                       const char **ports,
 337                       const char *share,
 338                       struct resolve_context *resolve_ctx,
 339                       struct cli_credentials *credentials,
 340                       struct smb2_tree **tree,
 341                       struct tevent_context *ev,
 342                       struct smbcli_options *options,
 343                       const char *socket_options,
 344                       struct gensec_settings *gensec_settings)
 345 {
 346         NTSTATUS status;
 347
 348         status = smb2_connect_ext(mem_ctx, host, ports, share, resolve_ctx,
 349                                   credentials,
 350                                   0, /* previous_session_id */
 351                                   tree, ev, options, socket_options,
 352                                   gensec_settings);
 353
 354         return status;
 355 }