source4/rpc_server/service_rpc.c

   1 /*
   2    Unix SMB/CIFS implementation.
   3
   4    smbd-specific dcerpc server code
   5
   6    Copyright (C) Andrew Tridgell 2003-2005
   7    Copyright (C) Stefan (metze) Metzmacher 2004-2005
   8    Copyright (C) Jelmer Vernooij <jelmer@samba.org> 2004,2007
   9
  10    This program is free software; you can redistribute it and/or modify
  11    it under the terms of the GNU General Public License as published by
  12    the Free Software Foundation; either version 3 of the License, or
  13    (at your option) any later version.
  14
  15    This program is distributed in the hope that it will be useful,
  16    but WITHOUT ANY WARRANTY; without even the implied warranty of
  17    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  18    GNU General Public License for more details.
  19
  20    You should have received a copy of the GNU General Public License
  21    along with this program.  If not, see <http://www.gnu.org/licenses/>.
  22 */
  23
  24 #include "includes.h"
  25 #include "librpc/gen_ndr/ndr_dcerpc.h"
  26 #include "auth/auth.h"
  27 #include "auth/gensec/gensec.h"
  28 #include "lib/util/dlinklist.h"
  29 #include "rpc_server/dcerpc_server.h"
  30 #include "lib/events/events.h"
  31 #include "smbd/service_task.h"
  32 #include "smbd/service_stream.h"
  33 #include "smbd/service.h"
  34 #include "system/filesys.h"
  35 #include "libcli/security/security.h"
  36 #include "lib/socket/socket.h"
  37 #include "lib/messaging/irpc.h"
  38 #include "system/network.h"
  39 #include "lib/socket/netif.h"
  40 #include "build.h"
  41 #include "param/param.h"
  42
  43 struct dcesrv_socket_context {
  44         const struct dcesrv_endpoint *endpoint;
  45         struct dcesrv_context *dcesrv_ctx;
  46 };
  47
  48 /*
  49   write_fn callback for dcesrv_output()
  50 */
  51 static NTSTATUS dcerpc_write_fn(void *private_data, DATA_BLOB *out, size_t *nwritten)
  52 {
  53         NTSTATUS status;
  54         struct socket_context *sock = talloc_get_type(private_data, struct socket_context);
  55         size_t sendlen;
  56
  57         status = socket_send(sock, out, &sendlen);
  58         NT_STATUS_IS_ERR_RETURN(status);
  59
  60         *nwritten = sendlen;
  61         return status;
  62 }
  63
  64 static void dcesrv_terminate_connection(struct dcesrv_connection *dce_conn, const char *reason)
  65 {
  66         struct stream_connection *srv_conn;
  67         srv_conn = talloc_get_type(dce_conn->transport.private_data,
  68                                    struct stream_connection);
  69
  70         stream_terminate_connection(srv_conn, reason);
  71 }
  72
  73 static void dcesrv_sock_report_output_data(struct dcesrv_connection *dcesrv_conn)
  74 {
  75         struct stream_connection *srv_conn;
  76         srv_conn = talloc_get_type(dcesrv_conn->transport.private_data,
  77                                    struct stream_connection);
  78
  79         if (srv_conn && srv_conn->event.fde) {
  80                 EVENT_FD_WRITEABLE(srv_conn->event.fde);
  81         }
  82 }
  83
  84 static struct socket_address *dcesrv_sock_get_my_addr(struct dcesrv_connection *dcesrv_conn, TALLOC_CTX *mem_ctx)
  85 {
  86         struct stream_connection *srv_conn;
  87         srv_conn = talloc_get_type(dcesrv_conn->transport.private_data,
  88                                    struct stream_connection);
  89
  90         return socket_get_my_addr(srv_conn->socket, mem_ctx);
  91 }
  92
  93 static struct socket_address *dcesrv_sock_get_peer_addr(struct dcesrv_connection *dcesrv_conn, TALLOC_CTX *mem_ctx)
  94 {
  95         struct stream_connection *srv_conn;
  96         srv_conn = talloc_get_type(dcesrv_conn->transport.private_data,
  97                                    struct stream_connection);
  98
  99         return socket_get_peer_addr(srv_conn->socket, mem_ctx);
 100 }
 101
 102 static void dcesrv_sock_accept(struct stream_connection *srv_conn)
 103 {
 104         NTSTATUS status;
 105         struct dcesrv_socket_context *dcesrv_sock =
 106                 talloc_get_type(srv_conn->private, struct dcesrv_socket_context);
 107         struct dcesrv_connection *dcesrv_conn = NULL;
 108         struct auth_session_info *session_info = NULL;
 109
 110         status = auth_anonymous_session_info(srv_conn, dcesrv_sock->dcesrv_ctx->lp_ctx, &session_info);
 111         if (!NT_STATUS_IS_OK(status)) {
 112                 DEBUG(0,("dcesrv_sock_accept: auth_anonymous_session_info failed: %s\n",
 113                         nt_errstr(status)));
 114                 stream_terminate_connection(srv_conn, nt_errstr(status));
 115                 return;
 116         }
 117
 118         status = dcesrv_endpoint_connect(dcesrv_sock->dcesrv_ctx,
 119                                          srv_conn,
 120                                          dcesrv_sock->endpoint,
 121                                          session_info,
 122                                          srv_conn->event.ctx,
 123                                          srv_conn->msg_ctx,
 124                                          srv_conn->server_id,
 125                                          DCESRV_CALL_STATE_FLAG_MAY_ASYNC,
 126                                          &dcesrv_conn);
 127         if (!NT_STATUS_IS_OK(status)) {
 128                 DEBUG(0,("dcesrv_sock_accept: dcesrv_endpoint_connect failed: %s\n",
 129                         nt_errstr(status)));
 130                 stream_terminate_connection(srv_conn, nt_errstr(status));
 131                 return;
 132         }
 133
 134         dcesrv_conn->transport.private_data             = srv_conn;
 135         dcesrv_conn->transport.report_output_data       = dcesrv_sock_report_output_data;
 136         dcesrv_conn->transport.get_my_addr              = dcesrv_sock_get_my_addr;
 137         dcesrv_conn->transport.get_peer_addr            = dcesrv_sock_get_peer_addr;
 138
 139         srv_conn->private = dcesrv_conn;
 140
 141         irpc_add_name(srv_conn->msg_ctx, "rpc_server");
 142
 143         return;
 144 }
 145
 146 static void dcesrv_sock_recv(struct stream_connection *conn, uint16_t flags)
 147 {
 148         NTSTATUS status;
 149         struct dcesrv_connection *dce_conn = talloc_get_type(conn->private, struct dcesrv_connection);
 150         DATA_BLOB tmp_blob;
 151         size_t nread;
 152
 153         if (dce_conn->processing) {
 154                 EVENT_FD_NOT_READABLE(conn->event.fde);
 155                 return;
 156         }
 157
 158         tmp_blob = data_blob_talloc(conn->socket, NULL, 0x1000);
 159         if (tmp_blob.data == NULL) {
 160                 dcesrv_terminate_connection(dce_conn, "out of memory");
 161                 return;
 162         }
 163
 164         status = socket_recv(conn->socket, tmp_blob.data, tmp_blob.length, &nread);
 165         if (NT_STATUS_IS_ERR(status)) {
 166                 dcesrv_terminate_connection(dce_conn, nt_errstr(status));
 167                 return;
 168         }
 169         if (nread == 0) {
 170                 talloc_free(tmp_blob.data);
 171                 return;
 172         }
 173
 174         tmp_blob.length = nread;
 175
 176         dce_conn->processing = true;
 177         status = dcesrv_input(dce_conn, &tmp_blob);
 178         dce_conn->processing = false;
 179         talloc_free(tmp_blob.data);
 180
 181         EVENT_FD_READABLE(conn->event.fde);
 182
 183         if (!NT_STATUS_IS_OK(status)) {
 184                 dcesrv_terminate_connection(dce_conn, nt_errstr(status));
 185                 return;
 186         }
 187
 188         if (dce_conn->call_list && dce_conn->call_list->replies) {
 189                 EVENT_FD_WRITEABLE(conn->event.fde);
 190         }
 191 }
 192
 193 static void dcesrv_sock_send(struct stream_connection *conn, uint16_t flags)
 194 {
 195         struct dcesrv_connection *dce_conn = talloc_get_type(conn->private, struct dcesrv_connection);
 196         NTSTATUS status;
 197
 198         status = dcesrv_output(dce_conn, conn->socket, dcerpc_write_fn);
 199         if (NT_STATUS_IS_ERR(status)) {
 200                 dcesrv_terminate_connection(dce_conn, "eof on socket");
 201                 return;
 202         }
 203
 204         if (!dce_conn->call_list || !dce_conn->call_list->replies) {
 205                 EVENT_FD_NOT_WRITEABLE(conn->event.fde);
 206         }
 207 }
 208
 209
 210 static const struct stream_server_ops dcesrv_stream_ops = {
 211         .name                   = "rpc",
 212         .accept_connection      = dcesrv_sock_accept,
 213         .recv_handler           = dcesrv_sock_recv,
 214         .send_handler           = dcesrv_sock_send,
 215 };
 216
 217
 218
 219 static NTSTATUS dcesrv_add_ep_unix(struct dcesrv_context *dce_ctx,
 220                                    struct loadparm_context *lp_ctx,
 221                                    struct dcesrv_endpoint *e,
 222                             struct event_context *event_ctx, const struct model_ops *model_ops)
 223 {
 224         struct dcesrv_socket_context *dcesrv_sock;
 225         uint16_t port = 1;
 226         NTSTATUS status;
 227
 228         dcesrv_sock = talloc(event_ctx, struct dcesrv_socket_context);
 229         NT_STATUS_HAVE_NO_MEMORY(dcesrv_sock);
 230
 231         /* remember the endpoint of this socket */
 232         dcesrv_sock->endpoint           = e;
 233         dcesrv_sock->dcesrv_ctx         = talloc_reference(dcesrv_sock, dce_ctx);
 234
 235         status = stream_setup_socket(event_ctx, lp_ctx,
 236                                      model_ops, &dcesrv_stream_ops,
 237                                      "unix", e->ep_description->endpoint, &port,
 238                                      lp_socket_options(lp_ctx),
 239                                      dcesrv_sock);
 240         if (!NT_STATUS_IS_OK(status)) {
 241                 DEBUG(0,("service_setup_stream_socket(path=%s) failed - %s\n",
 242                          e->ep_description->endpoint, nt_errstr(status)));
 243         }
 244
 245         return status;
 246 }
 247
 248 static NTSTATUS dcesrv_add_ep_ncalrpc(struct dcesrv_context *dce_ctx,
 249                                       struct loadparm_context *lp_ctx,
 250                                       struct dcesrv_endpoint *e,
 251                                       struct event_context *event_ctx, const struct model_ops *model_ops)
 252 {
 253         struct dcesrv_socket_context *dcesrv_sock;
 254         uint16_t port = 1;
 255         char *full_path;
 256         NTSTATUS status;
 257
 258         if (!e->ep_description->endpoint) {
 259                 /* No identifier specified: use DEFAULT.
 260                  * DO NOT hardcode this value anywhere else. Rather, specify
 261                  * no endpoint and let the epmapper worry about it. */
 262                 e->ep_description->endpoint = talloc_strdup(dce_ctx, "DEFAULT");
 263         }
 264
 265         full_path = talloc_asprintf(dce_ctx, "%s/%s", lp_ncalrpc_dir(lp_ctx),
 266                                     e->ep_description->endpoint);
 267
 268         dcesrv_sock = talloc(event_ctx, struct dcesrv_socket_context);
 269         NT_STATUS_HAVE_NO_MEMORY(dcesrv_sock);
 270
 271         /* remember the endpoint of this socket */
 272         dcesrv_sock->endpoint           = e;
 273         dcesrv_sock->dcesrv_ctx         = talloc_reference(dcesrv_sock, dce_ctx);
 274
 275         status = stream_setup_socket(event_ctx, lp_ctx,
 276                                      model_ops, &dcesrv_stream_ops,
 277                                      "unix", full_path, &port,
 278                                      lp_socket_options(lp_ctx),
 279                                      dcesrv_sock);
 280         if (!NT_STATUS_IS_OK(status)) {
 281                 DEBUG(0,("service_setup_stream_socket(identifier=%s,path=%s) failed - %s\n",
 282                          e->ep_description->endpoint, full_path, nt_errstr(status)));
 283         }
 284         return status;
 285 }
 286
 287
 288 /*
 289   add a socket address to the list of events, one event per dcerpc endpoint
 290 */
 291 static NTSTATUS add_socket_rpc_pipe_iface(struct dcesrv_context *dce_ctx, struct dcesrv_endpoint *e,
 292                                          struct event_context *event_ctx, const struct model_ops *model_ops)
 293 {
 294         struct dcesrv_socket_context *dcesrv_sock;
 295         NTSTATUS status;
 296
 297         if (e->ep_description->endpoint == NULL) {
 298                 DEBUG(0, ("Endpoint mandatory for named pipes\n"));
 299                 return NT_STATUS_INVALID_PARAMETER;
 300         }
 301
 302         dcesrv_sock = talloc(event_ctx, struct dcesrv_socket_context);
 303         NT_STATUS_HAVE_NO_MEMORY(dcesrv_sock);
 304
 305         /* remember the endpoint of this socket */
 306         dcesrv_sock->endpoint           = e;
 307         dcesrv_sock->dcesrv_ctx         = talloc_reference(dcesrv_sock, dce_ctx);
 308
 309         status = NT_STATUS_OK;
 310 #if 0
 311
 312         status = stream_setup_smb_pipe(event_ctx, model_ops, &dcesrv_stream_ops,
 313                                      e->ep_description->endpoint, dcesrv_sock);
 314         if (!NT_STATUS_IS_OK(status)) {
 315                 DEBUG(0,("service_setup_stream_socket(path=%s) failed - %s\n",
 316                          e->ep_description->endpoint, nt_errstr(status)));
 317         }
 318 #endif
 319         return status;
 320 }
 321
 322 static NTSTATUS dcesrv_add_ep_np(struct dcesrv_context *dce_ctx,
 323                                  struct loadparm_context *lp_ctx,
 324                                  struct dcesrv_endpoint *e,
 325                                  struct event_context *event_ctx, const struct model_ops *model_ops)
 326 {
 327         NTSTATUS status;
 328
 329         status = add_socket_rpc_pipe_iface(dce_ctx, e, event_ctx, model_ops);
 330         NT_STATUS_NOT_OK_RETURN(status);
 331
 332         return status;
 333 }
 334
 335 /*
 336   add a socket address to the list of events, one event per dcerpc endpoint
 337 */
 338 static NTSTATUS add_socket_rpc_tcp_iface(struct dcesrv_context *dce_ctx, struct dcesrv_endpoint *e,
 339                                          struct event_context *event_ctx, const struct model_ops *model_ops,
 340                                          const char *address)
 341 {
 342         struct dcesrv_socket_context *dcesrv_sock;
 343         uint16_t port = 0;
 344         NTSTATUS status;
 345
 346         if (e->ep_description->endpoint) {
 347                 port = atoi(e->ep_description->endpoint);
 348         }
 349
 350         dcesrv_sock = talloc(event_ctx, struct dcesrv_socket_context);
 351         NT_STATUS_HAVE_NO_MEMORY(dcesrv_sock);
 352
 353         /* remember the endpoint of this socket */
 354         dcesrv_sock->endpoint           = e;
 355         dcesrv_sock->dcesrv_ctx         = talloc_reference(dcesrv_sock, dce_ctx);
 356
 357         status = stream_setup_socket(event_ctx, dce_ctx->lp_ctx,
 358                                      model_ops, &dcesrv_stream_ops,
 359                                      "ipv4", address, &port,
 360                                      lp_socket_options(dce_ctx->lp_ctx),
 361                                      dcesrv_sock);
 362         if (!NT_STATUS_IS_OK(status)) {
 363                 DEBUG(0,("service_setup_stream_socket(address=%s,port=%u) failed - %s\n",
 364                          address, port, nt_errstr(status)));
 365         }
 366
 367         if (e->ep_description->endpoint == NULL) {
 368                 e->ep_description->endpoint = talloc_asprintf(dce_ctx, "%d", port);
 369         }
 370
 371         return status;
 372 }
 373
 374 static NTSTATUS dcesrv_add_ep_tcp(struct dcesrv_context *dce_ctx,
 375                                   struct loadparm_context *lp_ctx,
 376                                   struct dcesrv_endpoint *e,
 377                                   struct event_context *event_ctx, const struct model_ops *model_ops)
 378 {
 379         NTSTATUS status;
 380
 381         /* Add TCP/IP sockets */
 382         if (lp_interfaces(lp_ctx) && lp_bind_interfaces_only(lp_ctx)) {
 383                 int num_interfaces;
 384                 int i;
 385                 struct interface *ifaces;
 386
 387                 load_interfaces(dce_ctx, lp_interfaces(lp_ctx), &ifaces);
 388
 389                 num_interfaces = iface_count(ifaces);
 390                 for(i = 0; i < num_interfaces; i++) {
 391                         const char *address = iface_n_ip(ifaces, i);
 392                         status = add_socket_rpc_tcp_iface(dce_ctx, e, event_ctx, model_ops, address);
 393                         NT_STATUS_NOT_OK_RETURN(status);
 394                 }
 395         } else {
 396                 status = add_socket_rpc_tcp_iface(dce_ctx, e, event_ctx, model_ops,
 397                                                   lp_socket_address(lp_ctx));
 398                 NT_STATUS_NOT_OK_RETURN(status);
 399         }
 400
 401         return NT_STATUS_OK;
 402 }
 403
 404
 405 static NTSTATUS dcesrv_add_ep(struct dcesrv_context *dce_ctx,
 406                               struct loadparm_context *lp_ctx,
 407                               struct dcesrv_endpoint *e,
 408                           struct event_context *event_ctx, const struct model_ops *model_ops)
 409 {
 410         switch (e->ep_description->transport) {
 411         case NCACN_UNIX_STREAM:
 412                 return dcesrv_add_ep_unix(dce_ctx, lp_ctx, e, event_ctx, model_ops);
 413
 414         case NCALRPC:
 415                 return dcesrv_add_ep_ncalrpc(dce_ctx, lp_ctx, e, event_ctx, model_ops);
 416
 417         case NCACN_IP_TCP:
 418                 return dcesrv_add_ep_tcp(dce_ctx, lp_ctx, e, event_ctx, model_ops);
 419
 420         case NCACN_NP:
 421                 return dcesrv_add_ep_np(dce_ctx, lp_ctx, e, event_ctx, model_ops);
 422
 423         default:
 424                 return NT_STATUS_NOT_SUPPORTED;
 425         }
 426 }
 427
 428 /*
 429   open the dcerpc server sockets
 430 */
 431 static void dcesrv_task_init(struct task_server *task)
 432 {
 433         NTSTATUS status;
 434         struct dcesrv_context *dce_ctx;
 435         struct dcesrv_endpoint *e;
 436
 437         task_server_set_title(task, "task[dcesrv]");
 438
 439         status = dcesrv_init_context(task->event_ctx,
 440                                      task->lp_ctx,
 441                                      lp_dcerpc_endpoint_servers(task->lp_ctx),
 442                                      &dce_ctx);
 443         if (!NT_STATUS_IS_OK(status)) goto failed;
 444
 445         /* Make sure the directory for NCALRPC exists */
 446         if (!directory_exist(lp_ncalrpc_dir(task->lp_ctx))) {
 447                 mkdir(lp_ncalrpc_dir(task->lp_ctx), 0755);
 448         }
 449
 450         for (e=dce_ctx->endpoint_list;e;e=e->next) {
 451                 status = dcesrv_add_ep(dce_ctx, task->lp_ctx, e, task->event_ctx, task->model_ops);
 452                 if (!NT_STATUS_IS_OK(status)) goto failed;
 453         }
 454
 455         return;
 456 failed:
 457         task_server_terminate(task, "Failed to startup dcerpc server task");
 458 }
 459
 460 /*
 461   called on startup of the smb server service It's job is to start
 462   listening on all configured sockets
 463 */
 464 static NTSTATUS dcesrv_init(struct event_context *event_context,
 465                             struct loadparm_context *lp_ctx,
 466                             const struct model_ops *model_ops)
 467 {
 468         return task_server_startup(event_context, lp_ctx, "rpc",
 469                                    model_ops, dcesrv_task_init);
 470 }
 471
 472 NTSTATUS server_service_rpc_init(void)
 473 {
 474         init_module_fn static_init[] = { STATIC_dcerpc_server_MODULES };
 475         init_module_fn *shared_init = load_samba_modules(NULL, global_loadparm, "dcerpc_server");
 476
 477         run_init_functions(static_init);
 478         run_init_functions(shared_init);
 479
 480         talloc_free(shared_init);
 481
 482         return register_server_service("rpc", dcesrv_init);
 483 }