mirror of
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80 lines
2.3 KiB
C
80 lines
2.3 KiB
C
/*
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* Copyright (c) 2016 Lammert Bies
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* Copyright (c) 2013-2016 the Civetweb developers
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* Copyright (c) 2004-2013 Sergey Lyubka
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to deal
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* in the Software without restriction, including without limitation the rights
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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* THE SOFTWARE.
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*/
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#include "libhttp-private.h"
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static int isbyte( int n );
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/*
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* int XX_httplib_parse_net( const char *spec, uint32_t *net, uint32_t *mask );
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*
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* The function XX_httplib_parse_net() is used to parse an ASCII representation
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* of a subnet to convert it to a more machine readable binary version.
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*/
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int XX_httplib_parse_net( const char *spec, uint32_t *net, uint32_t *mask ) {
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int n;
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int a;
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int b;
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int c;
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int d;
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int slash = 32;
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int len = 0;
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if ((sscanf(spec, "%d.%d.%d.%d/%d%n", &a, &b, &c, &d, &slash, &n) == 5
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|| sscanf(spec, "%d.%d.%d.%d%n", &a, &b, &c, &d, &n) == 4) && isbyte(a)
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&& isbyte(b) && isbyte(c) && isbyte(d) && slash >= 0
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&& slash < 33) {
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len = n;
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*net = ((uint32_t)a << 24) | ((uint32_t)b << 16) | ((uint32_t)c << 8) | (uint32_t)d;
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*mask = slash ? (0xffffffffU << (32 - slash)) : 0;
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}
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return len;
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} /* XX_httplib_parse_net */
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/*
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* static int isbyte( int n );
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*
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* The function isbyte() checks if a single value in a decimal IP address
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* representation has a valid value.
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*/
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static int isbyte( int n ) {
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return n >= 0 && n <= 255;
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} /* isbyte */
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