source4/rpc_server/remote/dcesrv_remote.c

   1 /*
   2    Unix SMB/CIFS implementation.
   3    remote dcerpc operations
   4
   5    Copyright (C) Stefan (metze) Metzmacher 2004
   6
   7    This program is free software; you can redistribute it and/or modify
   8    it under the terms of the GNU General Public License as published by
   9    the Free Software Foundation; either version 2 of the License, or
  10    (at your option) any later version.
  11
  12    This program is distributed in the hope that it will be useful,
  13    but WITHOUT ANY WARRANTY; without even the implied warranty of
  14    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15    GNU General Public License for more details.
  16
  17    You should have received a copy of the GNU General Public License
  18    along with this program; if not, write to the Free Software
  19    Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  20 */
  21
  22 #include "includes.h"
  23 #include "rpc_server/dcerpc_server.h"
  24 #include "credentials.h"
  25
  26 struct dcesrv_remote_private {
  27         struct dcerpc_pipe *c_pipe;
  28 };
  29
  30 static NTSTATUS remote_op_bind(struct dcesrv_call_state *dce_call, const struct dcesrv_interface *iface)
  31 {
  32         NTSTATUS status;
  33         struct dcesrv_remote_private *private;
  34         const char *binding = lp_parm_string(-1, "dcerpc_remote", "binding");
  35         struct cli_credentials *credentials;
  36
  37         if (!binding) {
  38                 DEBUG(0,("You must specify a ncacn binding string\n"));
  39                 return NT_STATUS_INVALID_PARAMETER;
  40         }
  41
  42         private = talloc(dce_call->conn, struct dcesrv_remote_private);
  43         if (!private) {
  44                 return NT_STATUS_NO_MEMORY;
  45         }
  46
  47         credentials = cli_credentials_init(private);
  48
  49         cli_credentials_set_username(credentials, lp_parm_string(-1, "dcerpc_remote", "username"), CRED_SPECIFIED);
  50         cli_credentials_set_workstation(credentials, lp_netbios_name(), CRED_SPECIFIED);
  51         cli_credentials_set_domain(credentials, lp_workgroup(), CRED_SPECIFIED);
  52         cli_credentials_set_password(credentials, lp_parm_string(-1, "dcerpc_remote", "password"), CRED_SPECIFIED);
  53
  54         status = dcerpc_pipe_connect(private,
  55                                      &(private->c_pipe), binding,
  56                                      iface->uuid, iface->if_version,
  57                                      credentials, dce_call->event_ctx);
  58
  59         talloc_free(credentials);
  60         if (!NT_STATUS_IS_OK(status)) {
  61                 return status;
  62         }
  63
  64         dce_call->context->private = private;
  65
  66         return NT_STATUS_OK;
  67 }
  68
  69 static void remote_op_unbind(struct dcesrv_connection_context *context, const struct dcesrv_interface *iface)
  70 {
  71         struct dcesrv_remote_private *private = context->private;
  72
  73         talloc_free(private->c_pipe);
  74
  75         return;
  76 }
  77
  78 static NTSTATUS remote_op_ndr_pull(struct dcesrv_call_state *dce_call, TALLOC_CTX *mem_ctx, struct ndr_pull *pull, void **r)
  79 {
  80         NTSTATUS status;
  81         const struct dcerpc_interface_table *table = dce_call->context->iface->private;
  82         uint16_t opnum = dce_call->pkt.u.request.opnum;
  83
  84         dce_call->fault_code = 0;
  85
  86         if (opnum >= table->num_calls) {
  87                 dce_call->fault_code = DCERPC_FAULT_OP_RNG_ERROR;
  88                 return NT_STATUS_NET_WRITE_FAULT;
  89         }
  90
  91         *r = talloc_size(mem_ctx, table->calls[opnum].struct_size);
  92         if (!*r) {
  93                 return NT_STATUS_NO_MEMORY;
  94         }
  95
  96         /* unravel the NDR for the packet */
  97         status = table->calls[opnum].ndr_pull(pull, NDR_IN, *r);
  98         if (!NT_STATUS_IS_OK(status)) {
  99                 dcerpc_log_packet(table, opnum, NDR_IN,
 100                                   &dce_call->pkt.u.request.stub_and_verifier);
 101                 dce_call->fault_code = DCERPC_FAULT_NDR;
 102                 return NT_STATUS_NET_WRITE_FAULT;
 103         }
 104
 105         return NT_STATUS_OK;
 106 }
 107
 108 static NTSTATUS remote_op_dispatch(struct dcesrv_call_state *dce_call, TALLOC_CTX *mem_ctx, void *r)
 109 {
 110         struct dcesrv_remote_private *private = dce_call->context->private;
 111         uint16_t opnum = dce_call->pkt.u.request.opnum;
 112         const struct dcerpc_interface_table *table = dce_call->context->iface->private;
 113         const struct dcerpc_interface_call *call;
 114         const char *name;
 115
 116         name = table->calls[opnum].name;
 117         call = &table->calls[opnum];
 118
 119         if (private->c_pipe->conn->flags & DCERPC_DEBUG_PRINT_IN) {
 120                 ndr_print_function_debug(call->ndr_print, name, NDR_IN | NDR_SET_VALUES, r);
 121         }
 122
 123         /* we didn't use the return code of this function as we only check the last_fault_code */
 124         dcerpc_ndr_request(private->c_pipe, NULL, table, opnum, mem_ctx,r);
 125
 126         dce_call->fault_code = private->c_pipe->last_fault_code;
 127         if (dce_call->fault_code != 0) {
 128                 DEBUG(0,("dcesrv_remote: call[%s] failed with: %s!\n",name, dcerpc_errstr(mem_ctx, dce_call->fault_code)));
 129                 return NT_STATUS_NET_WRITE_FAULT;
 130         }
 131
 132         if ((dce_call->fault_code == 0) &&
 133             (private->c_pipe->conn->flags & DCERPC_DEBUG_PRINT_OUT)) {
 134                 ndr_print_function_debug(call->ndr_print, name, NDR_OUT, r);
 135         }
 136
 137         return NT_STATUS_OK;
 138 }
 139
 140 static NTSTATUS remote_op_ndr_push(struct dcesrv_call_state *dce_call, TALLOC_CTX *mem_ctx, struct ndr_push *push, const void *r)
 141 {
 142         NTSTATUS status;
 143         const struct dcerpc_interface_table *table = dce_call->context->iface->private;
 144         uint16_t opnum = dce_call->pkt.u.request.opnum;
 145
 146         /* unravel the NDR for the packet */
 147         status = table->calls[opnum].ndr_push(push, NDR_OUT, r);
 148         if (!NT_STATUS_IS_OK(status)) {
 149                 dce_call->fault_code = DCERPC_FAULT_NDR;
 150                 return NT_STATUS_NET_WRITE_FAULT;
 151         }
 152
 153         return NT_STATUS_OK;
 154 }
 155
 156 static NTSTATUS remote_register_one_iface(struct dcesrv_context *dce_ctx, const struct dcesrv_interface *iface)
 157 {
 158         int i;
 159         const struct dcerpc_interface_table *table = iface->private;
 160
 161         for (i=0;i<table->endpoints->count;i++) {
 162                 NTSTATUS ret;
 163                 const char *name = table->endpoints->names[i];
 164
 165                 ret = dcesrv_interface_register(dce_ctx, name, iface, NULL);
 166                 if (!NT_STATUS_IS_OK(ret)) {
 167                         DEBUG(1,("remote_op_init_server: failed to register endpoint '%s'\n",name));
 168                         return ret;
 169                 }
 170         }
 171
 172         return NT_STATUS_OK;
 173 }
 174
 175 static NTSTATUS remote_op_init_server(struct dcesrv_context *dce_ctx, const struct dcesrv_endpoint_server *ep_server)
 176 {
 177         int i;
 178         const char **ifaces = str_list_make(dce_ctx, lp_parm_string(-1,"dcerpc_remote","interfaces"),NULL);
 179
 180         if (!ifaces) {
 181                 DEBUG(3,("remote_op_init_server: no interfaces configured\n"));
 182                 return NT_STATUS_OK;
 183         }
 184
 185         for (i=0;ifaces[i];i++) {
 186                 NTSTATUS ret;
 187                 struct dcesrv_interface iface;
 188
 189                 if (!ep_server->interface_by_name(&iface, ifaces[i])) {
 190                         DEBUG(0,("remote_op_init_server: failed to find interface = '%s'\n", ifaces[i]));
 191                         talloc_free(ifaces);
 192                         return NT_STATUS_UNSUCCESSFUL;
 193                 }
 194
 195                 ret = remote_register_one_iface(dce_ctx, &iface);
 196                 if (!NT_STATUS_IS_OK(ret)) {
 197                         DEBUG(0,("remote_op_init_server: failed to register interface = '%s'\n", ifaces[i]));
 198                         talloc_free(ifaces);
 199                         return ret;
 200                 }
 201         }
 202
 203         talloc_free(ifaces);
 204         return NT_STATUS_OK;
 205 }
 206
 207 static BOOL remote_fill_interface(struct dcesrv_interface *iface, const struct dcerpc_interface_table *if_tabl)
 208 {
 209         iface->name = if_tabl->name;
 210         iface->uuid = if_tabl->uuid;
 211         iface->if_version = if_tabl->if_version;
 212
 213         iface->bind = remote_op_bind;
 214         iface->unbind = remote_op_unbind;
 215
 216         iface->ndr_pull = remote_op_ndr_pull;
 217         iface->dispatch = remote_op_dispatch;
 218         iface->ndr_push = remote_op_ndr_push;
 219
 220         iface->private = if_tabl;
 221
 222         return True;
 223 }
 224
 225 static BOOL remote_op_interface_by_uuid(struct dcesrv_interface *iface, const char *uuid, uint32_t if_version)
 226 {
 227         const struct dcerpc_interface_list *l;
 228
 229         for (l=librpc_dcerpc_pipes();l;l=l->next) {
 230                 if (l->table->if_version == if_version &&
 231                         strcmp(l->table->uuid, uuid)==0) {
 232                         return remote_fill_interface(iface, l->table);
 233                 }
 234         }
 235
 236         return False;
 237 }
 238
 239 static BOOL remote_op_interface_by_name(struct dcesrv_interface *iface, const char *name)
 240 {
 241         const struct dcerpc_interface_list *l;
 242
 243         for (l=librpc_dcerpc_pipes();l;l=l->next) {
 244                 if (strcmp(l->table->name, name)==0) {
 245                         return remote_fill_interface(iface, l->table);
 246                 }
 247         }
 248
 249         return False;
 250 }
 251
 252 NTSTATUS dcerpc_server_remote_init(void)
 253 {
 254         NTSTATUS ret;
 255         struct dcesrv_endpoint_server ep_server;
 256
 257         ZERO_STRUCT(ep_server);
 258
 259         /* fill in our name */
 260         ep_server.name = "remote";
 261
 262         /* fill in all the operations */
 263         ep_server.init_server = remote_op_init_server;
 264
 265         ep_server.interface_by_uuid = remote_op_interface_by_uuid;
 266         ep_server.interface_by_name = remote_op_interface_by_name;
 267
 268         /* register ourselves with the DCERPC subsystem. */
 269         ret = dcerpc_register_ep_server(&ep_server);
 270         if (!NT_STATUS_IS_OK(ret)) {
 271                 DEBUG(0,("Failed to register 'remote' endpoint server!\n"));
 272                 return ret;
 273         }
 274
 275         return ret;
 276 }