source3/rpc_client/ndr.c

   1 /*
   2    Unix SMB/CIFS implementation.
   3
   4    libndr interface
   5
   6    Copyright (C) Jelmer Vernooij 2006
   7    Copyright (C) Volker Lendecke 2009
   8
   9    This program is free software; you can redistribute it and/or modify
  10    it under the terms of the GNU General Public License as published by
  11    the Free Software Foundation; either version 3 of the License, or
  12    (at your option) any later version.
  13
  14    This program is distributed in the hope that it will be useful,
  15    but WITHOUT ANY WARRANTY; without even the implied warranty of
  16    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  17    GNU General Public License for more details.
  18
  19    You should have received a copy of the GNU General Public License
  20    along with this program.  If not, see <http://www.gnu.org/licenses/>.
  21 */
  22
  23 #include "includes.h"
  24
  25 struct cli_do_rpc_ndr_state {
  26         const struct ndr_interface_call *call;
  27         prs_struct q_ps, r_ps;
  28         void *r;
  29 };
  30
  31 static void cli_do_rpc_ndr_done(struct tevent_req *subreq);
  32
  33 struct tevent_req *cli_do_rpc_ndr_send(TALLOC_CTX *mem_ctx,
  34                                        struct tevent_context *ev,
  35                                        struct rpc_pipe_client *cli,
  36                                        const struct ndr_interface_table *table,
  37                                        uint32_t opnum,
  38                                        void *r)
  39 {
  40         struct tevent_req *req, *subreq;
  41         struct cli_do_rpc_ndr_state *state;
  42         struct ndr_push *push;
  43         DATA_BLOB blob;
  44         enum ndr_err_code ndr_err;
  45         bool ret;
  46
  47         req = tevent_req_create(mem_ctx, &state,
  48                                 struct cli_do_rpc_ndr_state);
  49         if (req == NULL) {
  50                 return NULL;
  51         }
  52
  53         if (!ndr_syntax_id_equal(&table->syntax_id, &cli->abstract_syntax)
  54             || (opnum >= table->num_calls)) {
  55                 tevent_req_nterror(req, NT_STATUS_INVALID_PARAMETER);
  56                 return tevent_req_post(req, ev);
  57         }
  58
  59         state->r = r;
  60         state->call = &table->calls[opnum];
  61
  62         if (DEBUGLEVEL >= 10) {
  63                 ndr_print_function_debug(state->call->ndr_print,
  64                                          state->call->name, NDR_IN, r);
  65         }
  66
  67         push = ndr_push_init_ctx(talloc_tos(), NULL);
  68         if (tevent_req_nomem(push, req)) {
  69                 return tevent_req_post(req, ev);
  70         }
  71
  72         ndr_err = state->call->ndr_push(push, NDR_IN, r);
  73         if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) {
  74                 tevent_req_nterror(req, ndr_map_error2ntstatus(ndr_err));
  75                 TALLOC_FREE(push);
  76                 return tevent_req_post(req, ev);
  77         }
  78
  79         blob = ndr_push_blob(push);
  80         ret = prs_init_data_blob(&state->q_ps, &blob, state);
  81         TALLOC_FREE(push);
  82
  83         if (!ret) {
  84                 tevent_req_nterror(req, NT_STATUS_NO_MEMORY);
  85                 return tevent_req_post(req, ev);
  86         }
  87
  88         subreq = rpc_api_pipe_req_send(state, ev, cli, opnum, &state->q_ps);
  89         if (tevent_req_nomem(subreq, req)) {
  90                 return tevent_req_post(req, ev);
  91         }
  92         tevent_req_set_callback(subreq, cli_do_rpc_ndr_done, req);
  93         return req;
  94 }
  95
  96 static void cli_do_rpc_ndr_done(struct tevent_req *subreq)
  97 {
  98         struct tevent_req *req = tevent_req_callback_data(
  99                 subreq, struct tevent_req);
 100         struct cli_do_rpc_ndr_state *state = tevent_req_data(
 101                 req, struct cli_do_rpc_ndr_state);
 102         NTSTATUS status;
 103
 104         status = rpc_api_pipe_req_recv(subreq, state, &state->r_ps);
 105         TALLOC_FREE(subreq);
 106         prs_mem_free(&state->q_ps);
 107         if (!NT_STATUS_IS_OK(status)) {
 108                 tevent_req_nterror(req, status);
 109                 return;
 110         }
 111         tevent_req_done(req);
 112 }
 113
 114 NTSTATUS cli_do_rpc_ndr_recv(struct tevent_req *req, TALLOC_CTX *mem_ctx)
 115 {
 116         struct cli_do_rpc_ndr_state *state = tevent_req_data(
 117                 req, struct cli_do_rpc_ndr_state);
 118         struct ndr_pull *pull;
 119         enum ndr_err_code ndr_err;
 120         NTSTATUS status;
 121         DATA_BLOB blob;
 122         bool ret;
 123
 124         if (tevent_req_is_nterror(req, &status)) {
 125                 return status;
 126         }
 127
 128         ret = prs_data_blob(&state->r_ps, &blob, talloc_tos());
 129         prs_mem_free(&state->r_ps);
 130         if (!ret) {
 131                 return NT_STATUS_NO_MEMORY;
 132         }
 133
 134         pull = ndr_pull_init_blob(&blob, mem_ctx, NULL);
 135         if (pull == NULL) {
 136                 return NT_STATUS_NO_MEMORY;
 137         }
 138
 139         /* have the ndr parser alloc memory for us */
 140         pull->flags |= LIBNDR_FLAG_REF_ALLOC;
 141         ndr_err = state->call->ndr_pull(pull, NDR_OUT, state->r);
 142         TALLOC_FREE(pull);
 143
 144         if (NDR_ERR_CODE_IS_SUCCESS(ndr_err)) {
 145                 if (DEBUGLEVEL >= 10) {
 146                         ndr_print_function_debug(state->call->ndr_print,
 147                                                  state->call->name, NDR_OUT,
 148                                                  state->r);
 149                 }
 150         } else {
 151                 return ndr_map_error2ntstatus(ndr_err);
 152         }
 153
 154         return NT_STATUS_OK;
 155 }
 156
 157 NTSTATUS cli_do_rpc_ndr(struct rpc_pipe_client *cli,
 158                         TALLOC_CTX *mem_ctx,
 159                         const struct ndr_interface_table *table,
 160                         uint32_t opnum, void *r)
 161 {
 162         TALLOC_CTX *frame = talloc_stackframe();
 163         struct event_context *ev;
 164         struct tevent_req *req;
 165         NTSTATUS status = NT_STATUS_OK;
 166
 167         ev = event_context_init(frame);
 168         if (ev == NULL) {
 169                 status = NT_STATUS_NO_MEMORY;
 170                 goto fail;
 171         }
 172
 173         req = cli_do_rpc_ndr_send(frame, ev, cli, table, opnum, r);
 174         if (req == NULL) {
 175                 status = NT_STATUS_NO_MEMORY;
 176                 goto fail;
 177         }
 178
 179         if (!tevent_req_poll(req, ev)) {
 180                 status = map_nt_error_from_unix(errno);
 181                 goto fail;
 182         }
 183
 184         status = cli_do_rpc_ndr_recv(req, mem_ctx);
 185
 186  fail:
 187         TALLOC_FREE(frame);
 188         return status;
 189 }