source3/librpc/rpc/dcerpc.c

   1 /*
   2    Unix SMB/CIFS implementation.
   3    Samba 4-compatible DCE/RPC API on top of the Samba 3 DCE/RPC client library.
   4    Copyright (C) Jelmer Vernooij <jelmer@samba.org> 2008
   5
   6    This program is free software; you can redistribute it and/or modify
   7    it under the terms of the GNU General Public License as published by
   8    the Free Software Foundation; either version 3 of the License, or
   9    (at your option) any later version.
  10
  11    This program is distributed in the hope that it will be useful,
  12    but WITHOUT ANY WARRANTY; without even the implied warranty of
  13    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14    GNU General Public License for more details.
  15
  16    You should have received a copy of the GNU General Public License
  17    along with this program.  If not, see <http://www.gnu.org/licenses/>.
  18 */
  19
  20 #include "includes.h"
  21 #include "librpc/rpc/dcerpc.h"
  22
  23 /**
  24  * Send a struct-based RPC request using the Samba 3 RPC client library.
  25  */
  26 struct rpc_request *dcerpc_ndr_request_send(struct dcerpc_pipe *p, const struct GUID *object,
  27                                             const struct ndr_interface_table *table, uint32_t opnum,
  28                                             TALLOC_CTX *mem_ctx, void *r)
  29 {
  30         const struct ndr_interface_call *call;
  31         struct ndr_push *push;
  32         struct rpc_request *ret = talloc(mem_ctx, struct rpc_request);
  33         enum ndr_err_code ndr_err;
  34         DATA_BLOB blob;
  35
  36         if (ret == NULL)
  37                 return NULL;
  38
  39         SMB_ASSERT(p->table->num_calls > opnum);
  40
  41         call = &p->table->calls[opnum];
  42
  43         ret->call = call;
  44         ret->r = r;
  45
  46         push = ndr_push_init_ctx(mem_ctx);
  47         if (!push) {
  48                 return NULL;
  49         }
  50
  51         ndr_err = call->ndr_push(push, NDR_IN, r);
  52         if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) {
  53                 /* FIXME: ndr_map_error2ntstatus(ndr_err); */
  54                 return NULL;
  55         }
  56
  57         blob = ndr_push_blob(push);
  58
  59         if (!prs_init_data_blob(&ret->q_ps, &blob, mem_ctx)) {
  60                 return NULL;
  61         }
  62
  63         talloc_free(push);
  64
  65         ret->opnum = opnum;
  66
  67         ret->pipe = p;
  68
  69         return ret;
  70 }
  71
  72 /**
  73  * Wait for a DCE/RPC request.
  74  *
  75  * @note at the moment this is still sync, even though the API is async.
  76  */
  77 NTSTATUS dcerpc_ndr_request_recv(struct rpc_request *req)
  78 {
  79         prs_struct r_ps;
  80         struct ndr_pull *pull;
  81         NTSTATUS status;
  82         DATA_BLOB blob;
  83         enum ndr_err_code ndr_err;
  84
  85         prs_init_empty( &r_ps, req, UNMARSHALL );
  86
  87         status = rpc_api_pipe_req(req->pipe->rpc_cli, req->opnum, &req->q_ps, &r_ps);
  88
  89         prs_mem_free( &req->q_ps );
  90
  91         if (!NT_STATUS_IS_OK(status)) {
  92                 prs_mem_free( &r_ps );
  93                 return status;
  94         }
  95
  96         if (!prs_data_blob(&r_ps, &blob, req)) {
  97                 prs_mem_free( &r_ps );
  98                 return NT_STATUS_NO_MEMORY;
  99         }
 100
 101         prs_mem_free( &r_ps );
 102
 103         pull = ndr_pull_init_blob(&blob, req);
 104         if (pull == NULL) {
 105                 return NT_STATUS_NO_MEMORY;
 106         }
 107
 108         /* have the ndr parser alloc memory for us */
 109         pull->flags |= LIBNDR_FLAG_REF_ALLOC;
 110         ndr_err = req->call->ndr_pull(pull, NDR_OUT, req->r);
 111         talloc_free(pull);
 112
 113         if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) {
 114                 return ndr_map_error2ntstatus(ndr_err);
 115         }
 116
 117         return NT_STATUS_OK;
 118 }
 119
 120 /**
 121  * Connect to a DCE/RPC interface.
 122  *
 123  * @note lp_ctx and ev are ignored at the moment but present
 124  *      for API compatibility.
 125  */
 126 _PUBLIC_ NTSTATUS dcerpc_pipe_connect(TALLOC_CTX *parent_ctx, struct dcerpc_pipe **pp,
 127                                       const char *binding_string, const struct ndr_interface_table *table,
 128                                       struct cli_credentials *credentials, struct event_context *ev,
 129                                       struct loadparm_context *lp_ctx)
 130 {
 131         struct dcerpc_pipe *p = talloc(parent_ctx, struct dcerpc_pipe);
 132         struct dcerpc_binding *binding;
 133         NTSTATUS nt_status;
 134
 135         nt_status = dcerpc_parse_binding(p, binding_string, &binding);
 136
 137         if (NT_STATUS_IS_ERR(nt_status)) {
 138                 DEBUG(1, ("Unable to parse binding string '%s'", binding_string));
 139                 talloc_free(p);
 140                 return nt_status;
 141         }
 142
 143         if (binding->transport != NCACN_NP) {
 144                 DEBUG(0, ("Only ncacn_np supported"));
 145                 talloc_free(p);
 146                 return NT_STATUS_NOT_SUPPORTED;
 147         }
 148
 149         /* FIXME: Actually use loadparm_context.. */
 150
 151         /* FIXME: actually use credentials */
 152
 153         nt_status = cli_full_connection(&p->cli, global_myname(), binding->host,
 154                                         NULL, 0,
 155                                         "IPC$", "IPC",
 156                                         get_cmdline_auth_info_username(),
 157                                         lp_workgroup(),
 158                                         get_cmdline_auth_info_password(),
 159                                         get_cmdline_auth_info_use_kerberos() ? CLI_FULL_CONNECTION_USE_KERBEROS : 0,
 160                                         get_cmdline_auth_info_signing_state(), NULL);
 161
 162         if (NT_STATUS_IS_ERR(nt_status)) {
 163                 talloc_free(p);
 164                 return nt_status;
 165         }
 166
 167         nt_status = cli_rpc_pipe_open_noauth(p->cli, &table->syntax_id,
 168                                              &p->rpc_cli);
 169
 170         if (!NT_STATUS_IS_OK(nt_status)) {
 171                 talloc_free(p);
 172                 return nt_status;
 173         }
 174
 175         p->table = table;
 176
 177         *pp = p;
 178
 179         return nt_status;
 180 }