ajp.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 AJP_H
#define AJP_H
 
#include "apr_version.h"
#include "apr.h"
 
#include "apr_hooks.h"
#include "apr_lib.h"
#include "apr_strings.h"
#include "apr_buckets.h"
#include "apr_md5.h"
#include "apr_network_io.h"
#include "apr_poll.h"
#include "apr_pools.h"
#include "apr_strings.h"
#include "apr_uri.h"
#include "apr_date.h"
#include "apr_fnmatch.h"
#define APR_WANT_STRFUNC
#include "apr_want.h"
 
#if APR_HAVE_NETINET_IN_H
#include <netinet/in.h>
#endif
#if APR_HAVE_ARPA_INET_H
#include <arpa/inet.h>
#endif
 
#define AJP13_DEF_HOST "127.0.0.1"
#ifdef NETWARE
#define AJP13_DEF_PORT 9009     /* default to 9009 since 8009 is used by OS */
#else
#define AJP13_DEF_PORT 8009
#endif
 
/* The following environment variables match mod_ssl! */
#define AJP13_HTTPS_INDICATOR           "HTTPS"
#define AJP13_SSL_PROTOCOL_INDICATOR    "SSL_PROTOCOL"
#define AJP13_SSL_CLIENT_CERT_INDICATOR "SSL_CLIENT_CERT"
#define AJP13_SSL_CIPHER_INDICATOR      "SSL_CIPHER"
#define AJP13_SSL_SESSION_INDICATOR     "SSL_SESSION_ID"
#define AJP13_SSL_KEY_SIZE_INDICATOR    "SSL_CIPHER_USEKEYSIZE"
 
#ifdef AJP_USE_HTTPD_WRAP
#include "httpd_wrap.h"
#else
#include "httpd.h"
#include "http_config.h"
#include "http_request.h"
#include "http_core.h"
#include "http_protocol.h"
#include "http_main.h"
#include "http_log.h"
#endif
 
#include "mod_proxy.h"
#include "util_ebcdic.h"
 
#define AJP_EOVERFLOW           (APR_OS_START_USERERR + 1)
#define AJP_ETOSMALL            (APR_OS_START_USERERR + 2)
#define AJP_EINVAL              (APR_OS_START_USERERR + 3)
#define AJP_EBAD_SIGNATURE      (APR_OS_START_USERERR + 4)
#define AJP_ETOBIG              (APR_OS_START_USERERR + 5)
#define AJP_ENO_HEADER          (APR_OS_START_USERERR + 6)
#define AJP_EBAD_HEADER         (APR_OS_START_USERERR + 7)
#define AJP_EBAD_MESSAGE        (APR_OS_START_USERERR + 8)
#define AJP_ELOGFAIL            (APR_OS_START_USERERR + 9)
 
 
typedef struct ajp_msg ajp_msg_t;
 
struct ajp_msg
{
    apr_byte_t  *buf;
    apr_size_t  header_len;
    apr_size_t  len;
    apr_size_t  pos;
    int         server_side;
    apr_size_t max_size;
};
 
#define AJP13_WS_HEADER             0x1234
#define AJP_HEADER_LEN              4
#define AJP_HEADER_SZ_LEN           2
#define AJP_HEADER_SZ               6
#define AJP_MSG_BUFFER_SZ           8192
#define AJP_MAX_BUFFER_SZ           65536
#define AJP13_MAX_SEND_BODY_SZ      (AJP_MAX_BUFFER_SZ - AJP_HEADER_SZ)
#define AJP_PING_PONG_SZ            128
 
#define CMD_AJP13_FORWARD_REQUEST   (unsigned char)2
#define CMD_AJP13_SEND_BODY_CHUNK   (unsigned char)3
#define CMD_AJP13_SEND_HEADERS      (unsigned char)4
#define CMD_AJP13_END_RESPONSE      (unsigned char)5
#define CMD_AJP13_GET_BODY_CHUNK    (unsigned char)6
#define CMD_AJP13_SHUTDOWN          (unsigned char)7
#define CMD_AJP13_PING              (unsigned char)8
#define CMD_AJP13_CPONG             (unsigned char)9
#define CMD_AJP13_CPING             (unsigned char)10
 
apr_status_t ajp_msg_check_header(ajp_msg_t *msg, apr_size_t *len);
 
apr_status_t ajp_msg_reset(ajp_msg_t *msg);
 
apr_status_t ajp_msg_reuse(ajp_msg_t *msg);
 
apr_status_t ajp_msg_end(ajp_msg_t *msg);
 
apr_status_t ajp_msg_append_uint32(ajp_msg_t *msg, apr_uint32_t value);
 
apr_status_t ajp_msg_append_uint16(ajp_msg_t *msg, apr_uint16_t value);
 
apr_status_t ajp_msg_append_uint8(ajp_msg_t *msg, apr_byte_t value);
 
apr_status_t ajp_msg_append_string_ex(ajp_msg_t *msg, const char *value,
                                      int convert);
#define ajp_msg_append_string(m, v) ajp_msg_append_string_ex(m, v, 1)
 
#define ajp_msg_append_string_ascii(m, v) ajp_msg_append_string_ex(m, v, 0)
 
apr_status_t ajp_msg_append_bytes(ajp_msg_t *msg, const apr_byte_t *value,
                                  apr_size_t valuelen);
 
apr_status_t ajp_msg_get_uint32(ajp_msg_t *msg, apr_uint32_t *rvalue);
 
apr_status_t ajp_msg_get_uint16(ajp_msg_t *msg, apr_uint16_t *rvalue);
 
apr_status_t ajp_msg_peek_uint16(ajp_msg_t *msg, apr_uint16_t *rvalue);
 
apr_status_t ajp_msg_get_uint8(ajp_msg_t *msg, apr_byte_t *rvalue);
 
apr_status_t ajp_msg_peek_uint8(ajp_msg_t *msg, apr_byte_t *rvalue);
 
apr_status_t ajp_msg_get_string(ajp_msg_t *msg, const char **rvalue);
 
 
apr_status_t ajp_msg_get_bytes(ajp_msg_t *msg, apr_byte_t **rvalue,
                               apr_size_t *rvalue_len);
 
apr_status_t ajp_msg_create(apr_pool_t *pool, apr_size_t size, ajp_msg_t **rmsg);
 
apr_status_t ajp_msg_copy(ajp_msg_t *smsg, ajp_msg_t *dmsg);
 
apr_status_t ajp_msg_serialize_ping(ajp_msg_t *msg);
 
apr_status_t ajp_msg_serialize_cping(ajp_msg_t *msg);
 
apr_status_t ajp_msg_dump(apr_pool_t *pool, ajp_msg_t *msg, char *err,
                          apr_size_t count, char **buf);
 
apr_status_t ajp_msg_log(request_rec *r, ajp_msg_t *msg, char *err);
 
apr_status_t ajp_ilink_send(apr_socket_t *sock, ajp_msg_t *msg);
 
apr_status_t ajp_ilink_receive(apr_socket_t *sock, ajp_msg_t *msg);
 
apr_status_t ajp_send_header(apr_socket_t *sock, request_rec *r,
                             apr_size_t buffsize,
                             apr_uri_t *uri,
                             const char *secret);
 
apr_status_t ajp_read_header(apr_socket_t *sock,
                             request_rec  *r,
                             apr_size_t buffsize,
                             ajp_msg_t **msg);
 
apr_status_t  ajp_alloc_data_msg(apr_pool_t *pool, char **ptr,
                                 apr_size_t *len, ajp_msg_t **msg);
 
apr_status_t  ajp_send_data_msg(apr_socket_t *sock,
                                ajp_msg_t *msg, apr_size_t len);
 
int ajp_parse_type(request_rec  *r, ajp_msg_t *msg);
 
apr_status_t ajp_parse_header(request_rec *r, proxy_dir_conf *conf,
                              ajp_msg_t *msg);
 
apr_status_t  ajp_parse_data(request_rec  *r, ajp_msg_t *msg,
                             apr_uint16_t *len, char **ptr);
 
 
apr_status_t ajp_parse_reuse(request_rec *r, ajp_msg_t *msg,
                             apr_byte_t *reuse);
 
 
apr_status_t ajp_handle_cping_cpong(apr_socket_t *sock,
                                    request_rec *r,
                                    apr_interval_time_t timeout);
 
 
const char *ajp_type_str(int type);
 
#endif /* AJP_H */