source: vendor/3.5.4/source3/rpc_client/ndr.c

/* 
   Unix SMB/CIFS implementation.

   libndr interface

   Copyright (C) Jelmer Vernooij 2006
   Copyright (C) Volker Lendecke 2009
   
   This program is free software; you can redistribute it and/or modify
   it under the terms of the GNU General Public License as published by
   the Free Software Foundation; either version 3 of the License, or
   (at your option) any later version.
   
   This program is distributed in the hope that it will be useful,
   but WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   GNU General Public License for more details.
   
   You should have received a copy of the GNU General Public License
   along with this program.  If not, see <http://www.gnu.org/licenses/>.
*/

#include "includes.h"

struct cli_do_rpc_ndr_state {
        const struct ndr_interface_call *call;
        prs_struct q_ps, r_ps;
        void *r;
};

static void cli_do_rpc_ndr_done(struct tevent_req *subreq);

struct tevent_req *cli_do_rpc_ndr_send(TALLOC_CTX *mem_ctx,
                                       struct tevent_context *ev,
                                       struct rpc_pipe_client *cli,
                                       const struct ndr_interface_table *table,
                                       uint32_t opnum,
                                       void *r)
{
        struct tevent_req *req, *subreq;
        struct cli_do_rpc_ndr_state *state;
        struct ndr_push *push;
        DATA_BLOB blob;
        enum ndr_err_code ndr_err;
        bool ret;

        req = tevent_req_create(mem_ctx, &state,
                                struct cli_do_rpc_ndr_state);
        if (req == NULL) {
                return NULL;
        }

        if (!ndr_syntax_id_equal(&table->syntax_id, &cli->abstract_syntax)
            || (opnum >= table->num_calls)) {
                tevent_req_nterror(req, NT_STATUS_INVALID_PARAMETER);
                return tevent_req_post(req, ev);
        }

        state->r = r;
        state->call = &table->calls[opnum];

        if (DEBUGLEVEL >= 10) {
                ndr_print_function_debug(state->call->ndr_print,
                                         state->call->name, NDR_IN, r);
        }

        push = ndr_push_init_ctx(talloc_tos(), NULL);
        if (tevent_req_nomem(push, req)) {
                return tevent_req_post(req, ev);
        }

        ndr_err = state->call->ndr_push(push, NDR_IN, r);
        if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) {
                tevent_req_nterror(req, ndr_map_error2ntstatus(ndr_err));
                TALLOC_FREE(push);
                return tevent_req_post(req, ev);
        }

        blob = ndr_push_blob(push);
        ret = prs_init_data_blob(&state->q_ps, &blob, state);
        TALLOC_FREE(push);

        if (!ret) {
                tevent_req_nterror(req, NT_STATUS_NO_MEMORY);
                return tevent_req_post(req, ev);
        }

        subreq = rpc_api_pipe_req_send(state, ev, cli, opnum, &state->q_ps);
        if (tevent_req_nomem(subreq, req)) {
                return tevent_req_post(req, ev);
        }
        tevent_req_set_callback(subreq, cli_do_rpc_ndr_done, req);
        return req;
}

static void cli_do_rpc_ndr_done(struct tevent_req *subreq)
{
        struct tevent_req *req = tevent_req_callback_data(
                subreq, struct tevent_req);
        struct cli_do_rpc_ndr_state *state = tevent_req_data(
                req, struct cli_do_rpc_ndr_state);
        NTSTATUS status;

        status = rpc_api_pipe_req_recv(subreq, state, &state->r_ps);
        TALLOC_FREE(subreq);
        prs_mem_free(&state->q_ps);
        if (!NT_STATUS_IS_OK(status)) {
                tevent_req_nterror(req, status);
                return;
        }
        tevent_req_done(req);
}

NTSTATUS cli_do_rpc_ndr_recv(struct tevent_req *req, TALLOC_CTX *mem_ctx)
{
        struct cli_do_rpc_ndr_state *state = tevent_req_data(
                req, struct cli_do_rpc_ndr_state);
        struct ndr_pull *pull;
        enum ndr_err_code ndr_err;
        NTSTATUS status;
        DATA_BLOB blob;
        bool ret;

        if (tevent_req_is_nterror(req, &status)) {
                return status;
        }

        ret = prs_data_blob(&state->r_ps, &blob, talloc_tos());
        prs_mem_free(&state->r_ps);
        if (!ret) {
                return NT_STATUS_NO_MEMORY;
        }

        pull = ndr_pull_init_blob(&blob, mem_ctx, NULL);
        if (pull == NULL) {
                return NT_STATUS_NO_MEMORY;
        }

        /* have the ndr parser alloc memory for us */
        pull->flags |= LIBNDR_FLAG_REF_ALLOC;
        ndr_err = state->call->ndr_pull(pull, NDR_OUT, state->r);
        TALLOC_FREE(pull);

        if (NDR_ERR_CODE_IS_SUCCESS(ndr_err)) {
                if (DEBUGLEVEL >= 10) {
                        ndr_print_function_debug(state->call->ndr_print,
                                                 state->call->name, NDR_OUT,
                                                 state->r);
                }
        } else {
                return ndr_map_error2ntstatus(ndr_err);
        }

        return NT_STATUS_OK;
}

NTSTATUS cli_do_rpc_ndr(struct rpc_pipe_client *cli,
                        TALLOC_CTX *mem_ctx,
                        const struct ndr_interface_table *table,
                        uint32_t opnum, void *r)
{
        TALLOC_CTX *frame = talloc_stackframe();
        struct event_context *ev;
        struct tevent_req *req;
        NTSTATUS status = NT_STATUS_OK;

        ev = event_context_init(frame);
        if (ev == NULL) {
                status = NT_STATUS_NO_MEMORY;
                goto fail;
        }

        req = cli_do_rpc_ndr_send(frame, ev, cli, table, opnum, r);
        if (req == NULL) {
                status = NT_STATUS_NO_MEMORY;
                goto fail;
        }

        if (!tevent_req_poll(req, ev)) {
                status = map_nt_error_from_unix(errno);
                goto fail;
        }

        status = cli_do_rpc_ndr_recv(req, mem_ctx);

 fail:
        TALLOC_FREE(frame);
        return status;
}