util_fcgi.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 APACHE_UTIL_FCGI_H
#define APACHE_UTIL_FCGI_H
 
#ifdef __cplusplus
extern "C" {
#endif
 
#include "httpd.h"
 
typedef struct {
    unsigned char version;
    unsigned char type;
    unsigned char requestIdB1;
    unsigned char requestIdB0;
    unsigned char contentLengthB1;
    unsigned char contentLengthB0;
    unsigned char paddingLength;
    unsigned char reserved;
} ap_fcgi_header;
 
/*
 * Number of bytes in the header portion of a FastCGI record
 * (i.e., ap_fcgi_header structure).  Future versions of the
 * protocol may increase the size.
 */
#define AP_FCGI_HEADER_LEN  8
 
/*
 * Maximum number of bytes in the content portion of a FastCGI record.
 */
#define AP_FCGI_MAX_CONTENT_LEN 65535
 
#define AP_FCGI_VERSION_1 1
 
#define AP_FCGI_BEGIN_REQUEST       1
#define AP_FCGI_ABORT_REQUEST       2
#define AP_FCGI_END_REQUEST         3
#define AP_FCGI_PARAMS              4
#define AP_FCGI_STDIN               5
#define AP_FCGI_STDOUT              6
#define AP_FCGI_STDERR              7
#define AP_FCGI_DATA                8
#define AP_FCGI_GET_VALUES          9
#define AP_FCGI_GET_VALUES_RESULT  10
#define AP_FCGI_UNKNOWN_TYPE       11
#define AP_FCGI_MAXTYPE (AP_FCGI_UNKNOWN_TYPE)
 
#define AP_FCGI_HDR_VERSION_OFFSET         0
#define AP_FCGI_HDR_TYPE_OFFSET            1
#define AP_FCGI_HDR_REQUEST_ID_B1_OFFSET   2
#define AP_FCGI_HDR_REQUEST_ID_B0_OFFSET   3
#define AP_FCGI_HDR_CONTENT_LEN_B1_OFFSET  4
#define AP_FCGI_HDR_CONTENT_LEN_B0_OFFSET  5
#define AP_FCGI_HDR_PADDING_LEN_OFFSET     6
#define AP_FCGI_HDR_RESERVED_OFFSET        7
 
typedef struct {
    unsigned char roleB1;
    unsigned char roleB0;
    unsigned char flags;
    unsigned char reserved[5];
} ap_fcgi_begin_request_body;
 
/*
 * Values for role component of ap_fcgi_begin_request_body
 */
#define AP_FCGI_RESPONDER  1
#define AP_FCGI_AUTHORIZER 2
#define AP_FCGI_FILTER     3
 
/*
 * Values for flags bits of ap_fcgi_begin_request_body
 */
#define AP_FCGI_KEEP_CONN  1  /* otherwise the application closes */
 
#define AP_FCGI_BRB_ROLEB1_OFFSET       0
#define AP_FCGI_BRB_ROLEB0_OFFSET       1
#define AP_FCGI_BRB_FLAGS_OFFSET        2
#define AP_FCGI_BRB_RESERVED0_OFFSET    3
#define AP_FCGI_BRB_RESERVED1_OFFSET    4
#define AP_FCGI_BRB_RESERVED2_OFFSET    5
#define AP_FCGI_BRB_RESERVED3_OFFSET    6
#define AP_FCGI_BRB_RESERVED4_OFFSET    7
 
AP_DECLARE(void) ap_fcgi_header_to_array(ap_fcgi_header *h,
                                         unsigned char a[]);
 
AP_DECLARE(void) ap_fcgi_header_from_array(ap_fcgi_header *h,
                                           unsigned char a[]);
 
AP_DECLARE(void) ap_fcgi_header_fields_from_array(unsigned char *version,
                                                  unsigned char *type,
                                                  apr_uint16_t *request_id,
                                                  apr_uint16_t *content_len,
                                                  unsigned char *padding_len,
                                                  unsigned char a[]);
 
AP_DECLARE(void) ap_fcgi_begin_request_body_to_array(ap_fcgi_begin_request_body *h,
                                                     unsigned char a[]);
 
AP_DECLARE(void) ap_fcgi_fill_in_header(ap_fcgi_header *header,
                                        unsigned char type,
                                        apr_uint16_t request_id,
                                        apr_uint16_t content_len,
                                        unsigned char padding_len);
 
AP_DECLARE(void) ap_fcgi_fill_in_request_body(ap_fcgi_begin_request_body *brb,
                                              int role,
                                              unsigned char flags);
 
AP_DECLARE(apr_size_t) ap_fcgi_encoded_env_len(apr_table_t *env,
                                               apr_size_t maxlen,
                                               int *starting_elem);
 
AP_DECLARE(apr_status_t) ap_fcgi_encode_env(request_rec *r,
                                            apr_table_t *env,
                                            void *buffer,
                                            apr_size_t buflen,
                                            int *starting_elem);
 
#define AP_FCGI_RESPONDER_STR   "RESPONDER"
#define AP_FCGI_AUTHORIZER_STR  "AUTHORIZER"
#define AP_FCGI_FILTER_STR      "FILTER"
 
#define AP_FCGI_APACHE_ROLE_AUTHENTICATOR_STR  "AUTHENTICATOR"
#define AP_FCGI_APACHE_ROLE_AUTHORIZER_STR     "AUTHORIZER"
#define AP_FCGI_APACHE_ROLE_ACCESS_CHECKER_STR "ACCESS_CHECKER"
 
#ifdef __cplusplus
}
#endif
 
#endif  /* !APACHE_UTIL_FCGI_H */