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/*
* fastcgi.h --
*
* Defines for the FastCGI protocol.
*
*
* Copyright (c) 1995-1996 Open Market, Inc.
*
* See the file "LICENSE.TERMS" for information on usage and redistribution
* of this file, and for a DISCLAIMER OF ALL WARRANTIES.
*
* $Id: fastcgi.h,v 1.1.1.1 1997/09/16 15:36:32 stanleyg Exp $
*/

#ifndef _FASTCGI_H
#define _FASTCGI_H

/*
* Listening socket file number
*/
#define FCGI_LISTENSOCK_FILENO 0

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;
} FCGI_Header;

#define FCGI_MAX_LENGTH 0xffff

/*
* Number of bytes in a FCGI_Header. Future versions of the protocol
* will not reduce this number.
*/
#define FCGI_HEADER_LEN 8

/*
* Value for version component of FCGI_Header
*/
#define FCGI_VERSION_1 1

/*
* Values for type component of FCGI_Header
*/
#define FCGI_BEGIN_REQUEST 1
#define FCGI_ABORT_REQUEST 2
#define FCGI_END_REQUEST 3
#define FCGI_PARAMS 4
#define FCGI_STDIN 5
#define FCGI_STDOUT 6
#define FCGI_STDERR 7
#define FCGI_DATA 8
#define FCGI_GET_VALUES 9
#define FCGI_GET_VALUES_RESULT 10
#define FCGI_UNKNOWN_TYPE 11
#define FCGI_MAXTYPE (FCGI_UNKNOWN_TYPE)

/*
* Value for requestId component of FCGI_Header
*/
#define FCGI_NULL_REQUEST_ID 0


typedef struct {
    unsigned char roleB1;
    unsigned char roleB0;
    unsigned char flags;
    unsigned char reserved[5];
} FCGI_BeginRequestBody;

typedef struct {
    FCGI_Header header;
    FCGI_BeginRequestBody body;
} FCGI_BeginRequestRecord;

/*
* Mask for flags component of FCGI_BeginRequestBody
*/
#define FCGI_KEEP_CONN 1

/*
* Values for role component of FCGI_BeginRequestBody
*/
#define FCGI_RESPONDER 1
#define FCGI_AUTHORIZER 2
#define FCGI_FILTER 3


typedef struct {
    unsigned char appStatusB3;
    unsigned char appStatusB2;
    unsigned char appStatusB1;
    unsigned char appStatusB0;
    unsigned char protocolStatus;
    unsigned char reserved[3];
} FCGI_EndRequestBody;

typedef struct {
    FCGI_Header header;
    FCGI_EndRequestBody body;
} FCGI_EndRequestRecord;

/*
* Values for protocolStatus component of FCGI_EndRequestBody
*/
#define FCGI_REQUEST_COMPLETE 0
#define FCGI_CANT_MPX_CONN 1
#define FCGI_OVERLOADED 2
#define FCGI_UNKNOWN_ROLE 3


/*
* Variable names for FCGI_GET_VALUES / FCGI_GET_VALUES_RESULT records
*/
#define FCGI_MAX_CONNS "FCGI_MAX_CONNS"
#define FCGI_MAX_REQS "FCGI_MAX_REQS"
#define FCGI_MPXS_CONNS "FCGI_MPXS_CONNS"


typedef struct {
    unsigned char type;
    unsigned char reserved[7];
} FCGI_UnknownTypeBody;

typedef struct {
    FCGI_Header header;
    FCGI_UnknownTypeBody body;
} FCGI_UnknownTypeRecord;

#endif /* _FASTCGI_H */
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