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         push = ndr_push_init_ctx(talloc_tos(), NULL);
  63         if (tevent_req_nomem(push, req)) {
  64                 return tevent_req_post(req, ev);
  65         }
  66
  67         ndr_err = state->call->ndr_push(push, NDR_IN, r);
  68         if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) {
  69                 tevent_req_nterror(req, ndr_map_error2ntstatus(ndr_err));
  70                 TALLOC_FREE(push);
  71                 return tevent_req_post(req, ev);
  72         }
  73
  74         blob = ndr_push_blob(push);
  75         ret = prs_init_data_blob(&state->q_ps, &blob, state);
  76         TALLOC_FREE(push);
  77
  78         if (!ret) {
  79                 tevent_req_nterror(req, NT_STATUS_NO_MEMORY);
  80                 return tevent_req_post(req, ev);
  81         }
  82
  83         subreq = rpc_api_pipe_req_send(state, ev, cli, opnum, &state->q_ps);
  84         if (tevent_req_nomem(subreq, req)) {
  85                 return tevent_req_post(req, ev);
  86         }
  87         tevent_req_set_callback(subreq, cli_do_rpc_ndr_done, req);
  88         return req;
  89 }
  90
  91 static void cli_do_rpc_ndr_done(struct tevent_req *subreq)
  92 {
  93         struct tevent_req *req = tevent_req_callback_data(
  94                 subreq, struct tevent_req);
  95         struct cli_do_rpc_ndr_state *state = tevent_req_data(
  96                 req, struct cli_do_rpc_ndr_state);
  97         NTSTATUS status;
  98
  99         status = rpc_api_pipe_req_recv(subreq, state, &state->r_ps);
 100         TALLOC_FREE(subreq);
 101         prs_mem_free(&state->q_ps);
 102         if (!NT_STATUS_IS_OK(status)) {
 103                 tevent_req_nterror(req, status);
 104                 return;
 105         }
 106         tevent_req_done(req);
 107 }
 108
 109 NTSTATUS cli_do_rpc_ndr_recv(struct tevent_req *req, TALLOC_CTX *mem_ctx)
 110 {
 111         struct cli_do_rpc_ndr_state *state = tevent_req_data(
 112                 req, struct cli_do_rpc_ndr_state);
 113         struct ndr_pull *pull;
 114         enum ndr_err_code ndr_err;
 115         NTSTATUS status;
 116         DATA_BLOB blob;
 117         bool ret;
 118
 119         if (tevent_req_is_nterror(req, &status)) {
 120                 return status;
 121         }
 122
 123         ret = prs_data_blob(&state->r_ps, &blob, talloc_tos());
 124         prs_mem_free(&state->r_ps);
 125         if (!ret) {
 126                 return NT_STATUS_NO_MEMORY;
 127         }
 128
 129         pull = ndr_pull_init_blob(&blob, mem_ctx, NULL);
 130         if (pull == NULL) {
 131                 return NT_STATUS_NO_MEMORY;
 132         }
 133
 134         /* have the ndr parser alloc memory for us */
 135         pull->flags |= LIBNDR_FLAG_REF_ALLOC;
 136         ndr_err = state->call->ndr_pull(pull, NDR_OUT, state->r);
 137         TALLOC_FREE(pull);
 138
 139         if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) {
 140                 return ndr_map_error2ntstatus(ndr_err);
 141         }
 142
 143         return NT_STATUS_OK;
 144 }
 145
 146 NTSTATUS cli_do_rpc_ndr(struct rpc_pipe_client *cli,
 147                         TALLOC_CTX *mem_ctx,
 148                         const struct ndr_interface_table *table,
 149                         uint32_t opnum, void *r)
 150 {
 151         TALLOC_CTX *frame = talloc_stackframe();
 152         struct event_context *ev;
 153         struct tevent_req *req;
 154         NTSTATUS status = NT_STATUS_OK;
 155
 156         ev = event_context_init(frame);
 157         if (ev == NULL) {
 158                 status = NT_STATUS_NO_MEMORY;
 159                 goto fail;
 160         }
 161
 162         req = cli_do_rpc_ndr_send(frame, ev, cli, table, opnum, r);
 163         if (req == NULL) {
 164                 status = NT_STATUS_NO_MEMORY;
 165                 goto fail;
 166         }
 167
 168         if (!tevent_req_poll(req, ev)) {
 169                 status = map_nt_error_from_unix(errno);
 170                 goto fail;
 171         }
 172
 173         status = cli_do_rpc_ndr_recv(req, mem_ctx);
 174  fail:
 175         TALLOC_FREE(frame);
 176         return status;
 177 }