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/* Copyright 2015 greenbytes GmbH (https://www.greenbytes.de)
*
* Licensed 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 <stdio.h>
#include <apr_strings.h>
#include <httpd.h>
#include <http_core.h>
#include <http_log.h>
#include <util_time.h>
#include <nghttp2/nghttp2.h>
#include "h2_private.h"
#include "h2_h2.h"
#include "h2_util.h"
#include "h2_request.h"
#include "h2_headers.h"
static int is_unsafe(server_rec *s)
{
core_server_config *conf = ap_get_core_module_config(s->module_config);
return (conf->http_conformance == AP_HTTP_CONFORMANCE_UNSAFE);
}
typedef struct {
apr_bucket_refcount refcount;
h2_headers *headers;
} h2_bucket_headers;
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_headers_make(apr_bucket *b, h2_headers *r)
{
h2_bucket_headers *br;
br = apr_bucket_alloc(sizeof(*br), b->list);
br->headers = r;
b = apr_bucket_shared_make(b, br, 0, 0);
b->type = &h2_bucket_type_headers;
return b;
}
apr_bucket * h2_bucket_headers_create(apr_bucket_alloc_t *list,
h2_headers *r)
{
apr_bucket *b = apr_bucket_alloc(sizeof(*b), list);
APR_BUCKET_INIT(b);
b->free = apr_bucket_free;
b->list = list;
b = h2_bucket_headers_make(b, r);
return b;
}
h2_headers *h2_bucket_headers_get(apr_bucket *b)
{
if (H2_BUCKET_IS_HEADERS(b)) {
return ((h2_bucket_headers *)b->data)->headers;
}
return NULL;
}
const apr_bucket_type_t h2_bucket_type_headers = {
"H2HEADERS", 5, APR_BUCKET_METADATA,
apr_bucket_destroy_noop,
bucket_read,
apr_bucket_setaside_noop,
apr_bucket_split_notimpl,
apr_bucket_shared_copy
};
apr_bucket *h2_bucket_headers_beam(struct h2_bucket_beam *beam,
apr_bucket_brigade *dest,
const apr_bucket *src)
{
if (H2_BUCKET_IS_HEADERS(src)) {
h2_headers *r = ((h2_bucket_headers *)src->data)->headers;
apr_bucket *b = h2_bucket_headers_create(dest->bucket_alloc, r);
APR_BRIGADE_INSERT_TAIL(dest, b);
return b;
}
return NULL;
}
h2_headers *h2_headers_create(int status, apr_table_t *headers_in,
apr_table_t *notes, apr_pool_t *pool)
{
h2_headers *headers = apr_pcalloc(pool, sizeof(h2_headers));
headers->status = status;
headers->headers = (headers_in? apr_table_copy(pool, headers_in)
: apr_table_make(pool, 5));
headers->notes = (notes? apr_table_copy(pool, notes)
: apr_table_make(pool, 5));
return headers;
}
h2_headers *h2_headers_rcreate(request_rec *r, int status,
apr_table_t *header, apr_pool_t *pool)
{
h2_headers *headers = h2_headers_create(status, header, r->notes, pool);
if (headers->status == HTTP_FORBIDDEN) {
const char *cause = apr_table_get(r->notes, "ssl-renegotiate-forbidden");
if (cause) {
/* This request triggered a TLS renegotiation that is now allowed
* in HTTP/2. Tell the client that it should use HTTP/1.1 for this.
*/
ap_log_rerror(APLOG_MARK, APLOG_DEBUG, headers->status, r,
APLOGNO(03061)
"h2_headers(%ld): renegotiate forbidden, cause: %s",
(long)r->connection->id, cause);
headers->status = H2_ERR_HTTP_1_1_REQUIRED;
}
}
if (is_unsafe(r->server)) {
apr_table_setn(headers->notes, H2_HDR_CONFORMANCE,
H2_HDR_CONFORMANCE_UNSAFE);
}
return headers;
}
h2_headers *h2_headers_copy(apr_pool_t *pool, h2_headers *h)
{
return h2_headers_create(h->status, apr_table_copy(pool, h->headers),
apr_table_copy(pool, h->notes), pool);
}
h2_headers *h2_headers_die(apr_status_t type,
const h2_request *req, apr_pool_t *pool)
{
h2_headers *headers;
char *date;
headers = apr_pcalloc(pool, sizeof(h2_headers));
headers->status = (type >= 200 && type < 600)? type : 500;
headers->headers = apr_table_make(pool, 5);
headers->notes = apr_table_make(pool, 5);
date = apr_palloc(pool, APR_RFC822_DATE_LEN);
ap_recent_rfc822_date(date, req? req->request_time : apr_time_now());
apr_table_setn(headers->headers, "Date", date);
apr_table_setn(headers->headers, "Server", ap_get_server_banner());
return headers;
}
int h2_headers_are_response(h2_headers *headers)
{
return headers->status >= 200;
}