h2_push.h

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/* 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.
 */

#ifndef __mod_h2__h2_push__
#define __mod_h2__h2_push__

#include "h2.h"

struct h2_request;
struct h2_headers;
struct h2_ngheader;
struct h2_session;
struct h2_stream;

typedef struct h2_push {
    const struct h2_request *req;
    h2_priority *priority;
} h2_push;

typedef enum {
    H2_PUSH_DIGEST_APR_HASH,
    H2_PUSH_DIGEST_SHA256
} h2_push_digest_type;

typedef struct h2_push_diary h2_push_diary;

typedef void h2_push_digest_calc(h2_push_diary *diary, apr_uint64_t *phash, h2_push *push);

struct h2_push_diary {
    apr_array_header_t  *entries;
    int         NMax; /* Maximum for N, should size change be necessary */
    int         N;    /* Current maximum number of entries, power of 2 */
    apr_uint64_t         mask; /* mask for relevant bits */
    unsigned int         mask_bits; /* number of relevant bits */
    const char          *authority;
    h2_push_digest_type  dtype;
    h2_push_digest_calc *dcalc;
};

apr_array_header_t *h2_push_collect(apr_pool_t *p, 
                                    const struct h2_request *req, 
                                    int push_policy, 
                                    const struct h2_headers *res);

h2_push_diary *h2_push_diary_create(apr_pool_t *p, int N);

apr_array_header_t *h2_push_diary_update(struct h2_session *session, apr_array_header_t *pushes);

apr_array_header_t *h2_push_collect_update(struct h2_stream *stream, 
                                           const struct h2_request *req, 
                                           const struct h2_headers *res);
apr_status_t h2_push_diary_digest_get(h2_push_diary *diary, apr_pool_t *p, 
                                      int maxP, const char *authority, 
                                      const char **pdata, apr_size_t *plen);

apr_status_t h2_push_diary_digest_set(h2_push_diary *diary, const char *authority, 
                                      const char *data, apr_size_t len);

apr_status_t h2_push_diary_digest64_set(h2_push_diary *diary, const char *authority, 
                                        const char *data64url, apr_pool_t *pool);

#endif /* defined(__mod_h2__h2_push__) */