/* Package Name    : twhttpd
 * File Name       : config.h
 * Author          : Sam NG <samng@computer.org>
 *
 * This package is an secure HTTP application proxy writen by Sam Ng.
 * Copyright (C) 2001 SAM NG
 * 
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License
 * as published by the Free Software Foundation; either version 2
 * of the License, or any later version.
 * 
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *  
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software 
 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, 
 * MA  02111-1307, USA.
 */


#ifndef CONFIG_H
#define CONFIG_H 1

/* default system config */
#define THIS_NAME             "twhttpd"
#define THIS_VERSION          "1.01"
#define CURRENT_DIR           "./"
#define DEFAULT_CACHE_DIR     ".cache"
#define DEFAULT_COOKIE_DIR    ".cookie"
#define DEFAULT_CONFIG_FILE   "%%PREFIX%%/etc/twhttpd.cfg"

#define SOCKET_TIMEOUT    45      /* socket timeout value */
#define CONNECT_TIMEOUT   15      /* connect timeout value */
#define LINGER_TIMEOUT    15      /* linger close timeout value */
#define SHUTDOWN_DELAY    15      /* delay close to receive tailing data */

/* extreme limits */
/* http header fields limits */
#define MAX_HEADER           8192       /* max size in each http request header */
#define MAX_HEADER_FIELDS    20         /* max no. of lines in a http request header */
#define MAX_HOST             64         /* max length for HOST name */
#define MAX_URL              256        /* max length for URL, does not include query string */
#define MAX_QUERY            512        /* max length for Query string */
#define MAX_SESSIONID        128        /* max length for SessionId in URL */
#define MAX_COOKIE           4096       /* max length for Cookie field, RFC standard */
#define MAX_AUTH             32         /* max length for WWW-Authentication */
#define MAX_ACCEPT           1024       /* max length for Accept* headers */
#define MAX_LINE             1024       /* max length for each line in http header */
#define MAX_STRING           256         /* max length for general string */
#define MAX_LOGURL           256        /* max lenght for URL in logging */
/* the different between MAX_LINE and MAX_STRNIG is 
 * MAX_STRING is usually use on header fields with one or two words only 
 * also noted no header fields other than COOKIE can be larger than MAX_LINE
 */
#if MAX_HOST   - MAX_LINE > 0 || \
    MAX_URL    - MAX_LINE > 0 || \
    MAX_QUERY  - MAX_LINE > 0 || \
    MAX_AUTH   - MAX_LINE > 0 || \
    MAX_ACCEPT - MAX_LINE > 0 || \
    MAX_STRING - MAX_LINE > 0
#error MAX_STRING, MAX_URL, MAX_QUERY, MAX_AUTH, MAX_ACCEPT and MAX_STRING can not be larger than MAX_LINE
#endif

/* other string limits */
#define MAX_LINK             10         /* max file link for expand_link() */
#define MAX_FORK_FAIL        3          /* max fork fail count */
#define MAX_RAB              8192       /* read ahead buffer size */
#define MAX_LZB              1024       /* lazy write buffer size */
#define MAX_SC               256        /* max server config per each daemon */

/* buffer for error html */
#define MAX_ERROR            8192       /* only use in send_error */

/* not allowed meta chars */
#define PATH_META         "|&<>%?;+#"  /* these meta-chars are not allowed in URL path */
/* |&<> are shell program control, better not allow it */
/* % is hexcode keyword, you should not see this anyway */
/* ? is for query string */
/* ; is the sessionid */
/* + means space in query strnig */
/* # is the anchor part, but all anchor part has been removed in parse_get() */

/* *****************************************************************\
 * if use agent does not issue if-mod-since, cache_timeout is used *
 * otherwise, cache_fast_timeout is used, even "pragam: no-cache"  *
 * set DEFAULT_CACHE_FAST_TIMEOUT to 0 to disable this feature     *
\* *****************************************************************/
#define DEFAULT_CACHE_FAST_TIMEOUT     (5*60)
#define DEFAULT_CACHE_TIMEOUT          (24*60*60)
#if DEFAULT_CACHE_FAST_TIMEOUT - DEFAULT_CACHE_TIMEOUT > 0
#error DEFAULT_CACHE_FAST_TIMEOUT should be less than DEFAULT_CACHE_TIMEOUT
#endif

/* you seldom need to change these */
#define B64_CPL              19         /* Char per line in base64 en/decode */
#define HTTPS_PORT           443        /* only allow CONNECT on this port */

/* max and min functinos */
#define max(a, b)    ( (a) > (b) ? (a) : (b) )
#define min(a, b)    ( (a) < (b) ? (a) : (b) )

/* solaris 2.8 have inet_pton but not inet_aton, 2.6/2.7 dont have neither */
#if defined HAVE_INET_ATON
# define    str2addr(x, y)     inet_aton(x, y)
#elif defined HAVE_INET_PTON
# define    str2addr(x, y)     inet_pton(AF_INET, x, y)
#else
int str2addr(char *x, struct in_addr *y)
{
    y->s_addr = (in_addr_t)inet_addr(x);
    if ( (in_addr_t)-1 == y->s_addr ) return 0;
    else return 1;
}
#endif

#endif /* CONFIG_H */