/* Licensed to the Apache Software Foundation (ASF) under one or more

 * contributor license agreements.  See the NOTICE file distributed with

 * this work for additional information regarding copyright ownership.

 * The ASF licenses this file to You under the Apache License, Version 2.0

 * (the "License"); you may not use this file except in compliance with

 * the License.  You may obtain a copy of the License at

 *

 *     http://www.apache.org/licenses/LICENSE-2.0

 *

 * Unless required by applicable law or agreed to in writing, software

 * distributed under the License is distributed on an "AS IS" BASIS,

 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.

 * See the License for the specific language governing permissions and

 * limitations under the License.

 */

/* Licensed to the Apache Software Foundation (ASF) under one or more

 * contributor license agreements.  See the NOTICE file distributed with

 * this work for additional information regarding copyright ownership.

 * The ASF licenses this file to You under the Apache License, Version 2.0

 * (the "License"); you may not use this file except in compliance with

 * the License.  You may obtain a copy of the License at

 *

 *     http://www.apache.org/licenses/LICENSE-2.0

 *

 * Unless required by applicable law or agreed to in writing, software

 * distributed under the License is distributed on an "AS IS" BASIS,

 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.

 * See the License for the specific language governing permissions and

 * limitations under the License.

 */

#include <assert.h>

#include <stddef.h>

#include <httpd.h>

#include <http_core.h>

#include <http_connection.h>

#include <http_log.h>

#include "h2_private.h"

#include "h2.h"

#include "h2_mplx.h"

#include "h2_stream.h"

#include "h2_bucket_eos.h"

typedef struct {

    apr_bucket_refcount refcount;

    h2_stream *stream;

} h2_bucket_eos;

static apr_status_t bucket_cleanup(void *data)

{

    h2_stream **pstream = data;

    if (*pstream) {

        /* If bucket_destroy is called after us, this prevents

         * bucket_destroy from trying to destroy the stream again. */

        *pstream = NULL;

    }

    return APR_SUCCESS;

}

static apr_status_t bucket_read(apr_bucket *b, const char **str,

                                apr_size_t *len, apr_read_type_e block)

{

    (void)b;

    (void)block;

    *str = NULL;

    *len = 0;

    return APR_SUCCESS;

}

apr_bucket *h2_bucket_eos_make(apr_bucket *b, h2_stream *stream)

{

    h2_bucket_eos *h;

    h = apr_bucket_alloc(sizeof(*h), b->list);

    h->stream = stream;

    b = apr_bucket_shared_make(b, h, 0, 0);

    b->type = &h2_bucket_type_eos;

    return b;

}

apr_bucket *h2_bucket_eos_create(apr_bucket_alloc_t *list,

                                 h2_stream *stream)

{

    apr_bucket *b = apr_bucket_alloc(sizeof(*b), list);

    APR_BUCKET_INIT(b);

    b->free = apr_bucket_free;

    b->list = list;

    b = h2_bucket_eos_make(b, stream);

    if (stream) {

        h2_bucket_eos *h = b->data;

        apr_pool_pre_cleanup_register(stream->pool, &h->stream, bucket_cleanup);

    }

    return b;

}

static void bucket_destroy(void *data)

{

    h2_bucket_eos *h = data;

    if (apr_bucket_shared_destroy(h)) {

        h2_stream *stream = h->stream;

        if (stream && stream->pool) {

            apr_pool_cleanup_kill(stream->pool, &h->stream, bucket_cleanup);

        }

        apr_bucket_free(h);

        if (stream) {

            h2_stream_dispatch(stream, H2_SEV_EOS_SENT);

        }

    }

}

const apr_bucket_type_t h2_bucket_type_eos = {

    "H2EOS", 5, APR_BUCKET_METADATA,

    bucket_destroy,

    bucket_read,

    apr_bucket_setaside_noop,

    apr_bucket_split_notimpl,

    apr_bucket_shared_copy

};