source4/librpc/rpc/dcerpc_connect.c

   1 /*
   2    Unix SMB/CIFS implementation.
   3
   4    dcerpc connect functions
   5
   6    Copyright (C) Andrew Tridgell 2003
   7    Copyright (C) Jelmer Vernooij 2004
   8    Copyright (C) Andrew Bartlett <abartlet@samba.org> 2005
   9    Copyright (C) Rafal Szczesniak  2005
  10
  11    This program is free software; you can redistribute it and/or modify
  12    it under the terms of the GNU General Public License as published by
  13    the Free Software Foundation; either version 2 of the License, or
  14    (at your option) any later version.
  15
  16    This program is distributed in the hope that it will be useful,
  17    but WITHOUT ANY WARRANTY; without even the implied warranty of
  18    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  19    GNU General Public License for more details.
  20
  21    You should have received a copy of the GNU General Public License
  22    along with this program; if not, write to the Free Software
  23    Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  24 */
  25
  26
  27 #include "includes.h"
  28 #include "system/network.h"
  29 #include "librpc/gen_ndr/ndr_epmapper.h"
  30 #include "librpc/gen_ndr/ndr_dcerpc.h"
  31 #include "librpc/gen_ndr/ndr_misc.h"
  32 #include "libcli/raw/libcliraw.h"
  33 #include "libcli/composite/composite.h"
  34 #include "libcli/smb_composite/smb_composite.h"
  35 #include "libcli/smb2/smb2.h"
  36
  37
  38 struct dcerpc_pipe_connect;
  39
  40 struct pipe_np_smb_state {
  41         struct smb_composite_connect conn;
  42         struct smbcli_tree *tree;
  43         struct dcerpc_pipe_connect io;
  44 };
  45
  46
  47 /*
  48   Stage 3 of ncacn_np_smb: Named pipe opened (or not)
  49 */
  50 void continue_pipe_open_smb(struct composite_context *ctx)
  51 {
  52         struct composite_context *c = talloc_get_type(ctx->async.private_data,
  53                                                       struct composite_context);
  54         struct pipe_np_smb_state *s = talloc_get_type(c->private_data,
  55                                                       struct pipe_np_smb_state);
  56
  57         /* receive result of named pipe open request on smb */
  58         c->status = dcerpc_pipe_open_smb_recv(ctx);
  59         if (!NT_STATUS_IS_OK(c->status)) {
  60                 DEBUG(0,("Failed to open pipe %s - %s\n", s->io.pipe_name, nt_errstr(c->status)));
  61                 composite_error(c, c->status);
  62                 return;
  63         }
  64
  65         composite_done(c);
  66 }
  67
  68 /*
  69   Stage 2 of ncacn_np_smb: Open a named pipe after successful smb connection
  70 */
  71 void continue_smb_connect(struct composite_context *ctx)
  72 {
  73         struct composite_context *open_ctx;
  74         struct composite_context *c = talloc_get_type(ctx->async.private_data,
  75                                                       struct composite_context);
  76         struct pipe_np_smb_state *s = talloc_get_type(c->private_data,
  77                                                       struct pipe_np_smb_state);
  78
  79         /* receive result of smb connect request */
  80         c->status = smb_composite_connect_recv(ctx, c);
  81         if (!NT_STATUS_IS_OK(c->status)) {
  82                 DEBUG(0,("Failed to connect to %s - %s\n", s->io.binding->host, nt_errstr(c->status)));
  83                 composite_error(c, c->status);
  84                 return;
  85         }
  86
  87         /* prepare named pipe open parameters */
  88         s->tree         = s->conn.out.tree;
  89         s->io.pipe_name = s->io.binding->endpoint;
  90
  91         /* send named pipe open request */
  92         open_ctx = dcerpc_pipe_open_smb_send(s->io.pipe->conn, s->tree, s->io.pipe_name);
  93         if (open_ctx == NULL) {
  94                 composite_error(c, NT_STATUS_NO_MEMORY);
  95                 return;
  96         }
  97
  98         composite_continue(c, open_ctx, continue_pipe_open_smb, c);
  99 }
 100
 101
 102 /*
 103   Initiate async open of a rpc connection to a rpc pipe on SMB using
 104   the binding structure to determine the endpoint and options
 105 */
 106 struct composite_context *dcerpc_pipe_connect_ncacn_np_smb_send(TALLOC_CTX *tmp_ctx,
 107                                                                 struct dcerpc_pipe_connect *io)
 108 {
 109         struct composite_context *c;
 110         struct pipe_np_smb_state *s;
 111         struct composite_context *conn_req;
 112         struct smb_composite_connect *conn;
 113
 114         /* composite context allocation and setup */
 115         c = talloc_zero(tmp_ctx, struct composite_context);
 116         if (c == NULL) return NULL;
 117
 118         s = talloc_zero(c, struct pipe_np_smb_state);
 119         if (s == NULL) {
 120                 composite_error(c, NT_STATUS_NO_MEMORY);
 121                 goto done;
 122         }
 123
 124         c->state = COMPOSITE_STATE_IN_PROGRESS;
 125         c->private_data = s;
 126         c->event_ctx = io->pipe->conn->event_ctx;
 127
 128         s->io  = *io;
 129         conn   = &s->conn;
 130
 131         /* prepare smb connection parameters: we're connecting to IPC$ share on
 132            remote rpc server */
 133         conn->in.dest_host              = s->io.binding->host;
 134         conn->in.port                   = 0;
 135         conn->in.called_name            = strupper_talloc(tmp_ctx, s->io.binding->host);
 136         conn->in.service                = "IPC$";
 137         conn->in.service_type           = NULL;
 138         conn->in.fallback_to_anonymous  = False;
 139         conn->in.workgroup              = lp_workgroup();
 140
 141         /*
 142          * provide proper credentials - user supplied or anonymous in case this is
 143          * schannel connection
 144          */
 145         if (s->io.binding->flags & DCERPC_SCHANNEL) {
 146                 struct cli_credentials *anon_creds;
 147
 148                 anon_creds = cli_credentials_init(tmp_ctx);
 149                 if (!anon_creds) {
 150                         composite_error(c, NT_STATUS_NO_MEMORY);
 151                         goto done;
 152                 }
 153
 154                 cli_credentials_set_anonymous(anon_creds);
 155                 cli_credentials_guess(anon_creds);
 156
 157                 s->conn.in.credentials = anon_creds;
 158
 159         } else {
 160                 s->conn.in.credentials = s->io.creds;
 161         }
 162
 163         /* send smb connect request */
 164         conn_req = smb_composite_connect_send(conn, s->io.pipe->conn, s->io.pipe->conn->event_ctx);
 165         if (!conn_req) {
 166                 composite_error(c, NT_STATUS_NO_MEMORY);
 167                 goto done;
 168         }
 169
 170         composite_continue(c, conn_req, continue_smb_connect, c);
 171
 172 done:
 173         return c;
 174 }
 175
 176
 177 /*
 178   Receive result of a rpc connection to a rpc pipe on SMB
 179 */
 180 NTSTATUS dcerpc_pipe_connect_ncacn_np_smb_recv(struct composite_context *c)
 181 {
 182         NTSTATUS status = composite_wait(c);
 183
 184         talloc_free(c);
 185         return status;
 186 }
 187
 188
 189 /*
 190   Sync version of a rpc connection to a rpc pipe on SMB
 191 */
 192 NTSTATUS dcerpc_pipe_connect_ncacn_np_smb(TALLOC_CTX *tmp_ctx,
 193                                           struct dcerpc_pipe_connect *io)
 194 {
 195         struct composite_context *c;
 196         c = dcerpc_pipe_connect_ncacn_np_smb_send(tmp_ctx, io);
 197         return dcerpc_pipe_connect_ncacn_np_smb_recv(c);
 198 }
 199
 200
 201 struct pipe_np_smb2_state {
 202         struct smb2_tree *tree;
 203         struct dcerpc_pipe_connect io;
 204 };
 205
 206
 207 /*
 208   Stage 3 of ncacn_np_smb: Named pipe opened (or not)
 209 */
 210 void continue_pipe_open_smb2(struct composite_context *ctx)
 211 {
 212         struct composite_context *c = talloc_get_type(ctx->async.private_data,
 213                                                       struct composite_context);
 214         struct pipe_np_smb2_state *s = talloc_get_type(c->private_data,
 215                                                        struct pipe_np_smb2_state);
 216
 217         /* receive result of named pipe open request on smb2 */
 218         c->status = dcerpc_pipe_open_smb2_recv(ctx);
 219         if (!NT_STATUS_IS_OK(c->status)) {
 220                 DEBUG(0,("Failed to open pipe %s - %s\n", s->io.pipe_name, nt_errstr(c->status)));
 221                 composite_error(c, c->status);
 222                 return;
 223         }
 224
 225         composite_done(c);
 226 }
 227
 228
 229 /*
 230   Stage 2 of ncacn_np_smb2: Open a named pipe after successful smb2 connection
 231 */
 232 void continue_smb2_connect(struct composite_context *ctx)
 233 {
 234         struct composite_context *open_req;
 235         struct composite_context *c = talloc_get_type(ctx->async.private_data,
 236                                                       struct composite_context);
 237         struct pipe_np_smb2_state *s = talloc_get_type(c->private_data,
 238                                                        struct pipe_np_smb2_state);
 239
 240         /* receive result of smb2 connect request */
 241         c->status = smb2_connect_recv(ctx, c, &s->tree);
 242         if (!NT_STATUS_IS_OK(c->status)) {
 243                 DEBUG(0,("Failed to connect to %s - %s\n", s->io.binding->host, nt_errstr(c->status)));
 244                 composite_error(c, c->status);
 245                 return;
 246         }
 247
 248         /* prepare named pipe open parameters */
 249         s->io.pipe_name = s->io.binding->endpoint;
 250
 251         /* send named pipe open request */
 252         open_req = dcerpc_pipe_open_smb2_send(s->io.pipe->conn, s->tree, s->io.pipe_name);
 253         if (open_req == NULL) {
 254                 composite_error(c, NT_STATUS_NO_MEMORY);
 255                 return;
 256         }
 257
 258         composite_continue(c, open_req, continue_pipe_open_smb2, c);
 259 }
 260
 261
 262 /*
 263    Initiate async open of a rpc connection request on SMB2 using
 264    the binding structure to determine the endpoint and options
 265 */
 266 struct composite_context *dcerpc_pipe_connect_ncacn_np_smb2_send(TALLOC_CTX *mem_ctx,
 267                                                                  struct dcerpc_pipe_connect *io)
 268 {
 269         struct composite_context *c;
 270         struct pipe_np_smb2_state *s;
 271         struct composite_context *conn_req;
 272
 273         /* composite context allocation and setup */
 274         c = talloc_zero(mem_ctx, struct composite_context);
 275         if (c == NULL) return NULL;
 276
 277         s = talloc_zero(c, struct pipe_np_smb2_state);
 278         if (s == NULL) {
 279                 composite_error(c, NT_STATUS_NO_MEMORY);
 280                 goto done;
 281         }
 282
 283         c->state = COMPOSITE_STATE_IN_PROGRESS;
 284         c->private_data = s;
 285         c->event_ctx = io->pipe->conn->event_ctx;
 286
 287         s->io = *io;
 288
 289         /*
 290          * provide proper credentials - user supplied or anonymous in case this is
 291          * schannel connection
 292          */
 293         if (s->io.binding->flags & DCERPC_SCHANNEL) {
 294                 s->io.creds = cli_credentials_init(mem_ctx);
 295                 if (s->io.creds) {
 296                         composite_error(c, NT_STATUS_NO_MEMORY);
 297                         goto done;
 298                 }
 299
 300                 cli_credentials_set_anonymous(s->io.creds);
 301                 cli_credentials_guess(s->io.creds);
 302         }
 303
 304         /* send smb2 connect request */
 305         conn_req = smb2_connect_send(mem_ctx, s->io.binding->host, "IPC$", s->io.creds,
 306                                      c->event_ctx);
 307         if (conn_req == NULL) {
 308                 composite_error(c, NT_STATUS_NO_MEMORY);
 309                 goto done;
 310         }
 311
 312         composite_continue(c, conn_req, continue_smb2_connect, c);
 313
 314 done:
 315         return c;
 316 }
 317
 318
 319 /*
 320   Receive result of a rpc connection to a rpc pipe on SMB2
 321 */
 322 NTSTATUS dcerpc_pipe_connect_ncacn_np_smb2_recv(struct composite_context *c)
 323 {
 324         NTSTATUS status = composite_wait(c);
 325
 326         talloc_free(c);
 327         return status;
 328 }
 329
 330
 331 /*
 332   Sync version of a rpc connection to a rpc pipe on SMB2
 333 */
 334 NTSTATUS dcerpc_pipe_connect_ncacn_np_smb2(TALLOC_CTX *mem_ctx,
 335                                            struct dcerpc_pipe_connect *io)
 336 {
 337         struct composite_context *c;
 338         c = dcerpc_pipe_connect_ncacn_np_smb2_send(mem_ctx, io);
 339         return dcerpc_pipe_connect_ncacn_np_smb2_recv(c);
 340 }