source: vendor/3.6.0/lib/util/tevent_ntstatus.c

/*
   Unix SMB/CIFS implementation.
   Wrap unix errno around tevent_req
   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 "../replace/replace.h"
#include "tevent_ntstatus.h"

#define TEVENT_NTERROR_MAGIC (0x917b5acd)

bool _tevent_req_nterror(struct tevent_req *req,
                         NTSTATUS status,
                         const char *location)
{
        uint64_t err;

        if (NT_STATUS_IS_OK(status)) {
                return false;
        }

        /*
         * I've put this variable here, because I'm not 100% certain
         * how to correctly assign a 64-bit constant and left-shift it
         * by 32 bits in a single expression. If anyone knows, feel
         * free :-)
         */
        err = TEVENT_NTERROR_MAGIC;
        err <<= 32;
        err |= NT_STATUS_V(status);

        return _tevent_req_error(req, err, location);
}

bool tevent_req_is_nterror(struct tevent_req *req, NTSTATUS *status)
{
        enum tevent_req_state state;
        uint64_t err;

        if (!tevent_req_is_error(req, &state, &err)) {
                return false;
        }
        switch (state) {
        case TEVENT_REQ_TIMED_OUT:
                *status = NT_STATUS_IO_TIMEOUT;
                break;
        case TEVENT_REQ_NO_MEMORY:
                *status = NT_STATUS_NO_MEMORY;
                break;
        case TEVENT_REQ_USER_ERROR:
                if ((err >> 32) != TEVENT_NTERROR_MAGIC) {
                        abort();
                }
                *status = NT_STATUS(err & 0xffffffff);
                break;
        default:
                *status = NT_STATUS_INTERNAL_ERROR;
                break;
        }
        return true;
}

NTSTATUS tevent_req_simple_recv_ntstatus(struct tevent_req *req)
{
        NTSTATUS status;

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

void tevent_req_simple_finish_ntstatus(struct tevent_req *subreq,
                                       NTSTATUS subreq_status)
{
        struct tevent_req *req = tevent_req_callback_data(
                subreq, struct tevent_req);

        TALLOC_FREE(subreq);

        if (!NT_STATUS_IS_OK(subreq_status)) {
                tevent_req_nterror(req, subreq_status);
                return;
        }
        tevent_req_done(req);
}