server/gen_test_char.c

/* ====================================================================
 * The Apache Software License, Version 1.1
 *
 * Copyright (c) 2000 The Apache Software Foundation.  All rights
 * reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
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 * 1. Redistributions of source code must retain the above copyright
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 *    notice, this list of conditions and the following disclaimer in
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 * 3. The end-user documentation included with the redistribution,
 *    if any, must include the following acknowledgment:
 *       "This product includes software developed by the
 *        Apache Software Foundation (http://www.apache.org/)."
 *    Alternately, this acknowledgment may appear in the software itself,
 *    if and wherever such third-party acknowledgments normally appear.
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 *    not be used to endorse or promote products derived from this
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 * 5. Products derived from this software may not be called "Apache",
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 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED
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 * ====================================================================
 *
 * This software consists of voluntary contributions made by many
 * individuals on behalf of the Apache Software Foundation.  For more
 * information on the Apache Software Foundation, please see
 * <http://www.apache.org/>.
 *
 * Portions of this software are based upon public domain software
 * originally written at the National Center for Supercomputing Applications,
 * University of Illinois, Urbana-Champaign.
 */

/* we need some of the portability definitions... for strchr */
#include "ap_config.h"
#include "httpd.h"

/* A bunch of functions in util.c scan strings looking for certain characters.
 * To make that more efficient we encode a lookup table.
 */
#define T_ESCAPE_SHELL_CMD	(0x01)
#define T_ESCAPE_PATH_SEGMENT	(0x02)
#define T_OS_ESCAPE_PATH	(0x04)
#define T_HTTP_TOKEN_STOP	(0x08)

int main(int argc, char *argv[])
{
    unsigned c;
    unsigned char flags;

    printf(
"/* this file is automatically generated by gen_test_char, do not edit */\n"
"#define T_ESCAPE_SHELL_CMD	(%u)\n"
"#define T_ESCAPE_PATH_SEGMENT	(%u)\n"
"#define T_OS_ESCAPE_PATH	(%u)\n"
"#define T_HTTP_TOKEN_STOP	(%u)\n"
"\n"
"static const unsigned char test_char_table[256] = {\n"
"    0,",
	T_ESCAPE_SHELL_CMD,
	T_ESCAPE_PATH_SEGMENT,
	T_OS_ESCAPE_PATH,
	T_HTTP_TOKEN_STOP);

    /* we explicitly dealt with NUL above
     * in case some strchr() do bogosity with it */

    for (c = 1; c < 256; ++c) {
	flags = 0;
	if (c % 20 == 0)
	    printf("\n    ");

	/* escape_shell_cmd */
	if (strchr("&;`'\"|*?~<>^()[]{}$\\\n", c)) {
	    flags |= T_ESCAPE_SHELL_CMD;
	}

	if (!ap_isalnum(c) && !strchr("$-_.+!*'(),:@&=~", c)) {
	    flags |= T_ESCAPE_PATH_SEGMENT;
	}

	if (!ap_isalnum(c) && !strchr("$-_.+!*'(),:@&=/~", c)) {
	    flags |= T_OS_ESCAPE_PATH;
	}

	/* these are the "tspecials" from RFC2068 */
	if (ap_iscntrl(c) || strchr(" \t()<>@,;:\\/[]?={}", c)) {
	    flags |= T_HTTP_TOKEN_STOP;
	}
	printf("%u%c", flags, (c < 255) ? ',' : ' ');

    }
    printf("\n};\n");

    return 0;
}