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42 lines
2.9 KiB
C
42 lines
2.9 KiB
C
/*-*- mode:c;indent-tabs-mode:nil;c-basic-offset:2;tab-width:8;coding:utf-8 -*-│
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│vi: set net ft=c ts=2 sts=2 sw=2 fenc=utf-8 :vi│
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╞══════════════════════════════════════════════════════════════════════════════╡
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│ Copyright 2022 Justine Alexandra Roberts Tunney │
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│ │
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│ Permission to use, copy, modify, and/or distribute this software for │
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│ any purpose with or without fee is hereby granted, provided that the │
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│ above copyright notice and this permission notice appear in all copies. │
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│ │
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│ THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL │
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│ WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED │
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│ WARRANTIES OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE │
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│ AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL │
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│ DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR │
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│ PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER │
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│ TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR │
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│ PERFORMANCE OF THIS SOFTWARE. │
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╚─────────────────────────────────────────────────────────────────────────────*/
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#include "net/http/ip.h"
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/**
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* Returns true if `x` is Cloudflare IPv4 address.
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*
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* @see https://www.cloudflare.com/ips/ (April 8, 2021)
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*/
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bool IsCloudflareIp(uint32_t x) {
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return (x & 0xfffffc00) == 0x6715f400 || // 103.21.244.0/22
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(x & 0xfffffc00) == 0x6716c800 || // 103.22.200.0/22
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(x & 0xfffffc00) == 0x671f0400 || // 103.31.4.0/22
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(x & 0xfff80000) == 0x68100000 || // 104.16.0.0/13
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(x & 0xfffc0000) == 0x68180000 || // 104.24.0.0/14
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(x & 0xffffc000) == 0x6ca2c000 || // 108.162.192.0/18
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(x & 0xfffffc00) == 0x83004800 || // 131.0.72.0/22
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(x & 0xffffc000) == 0x8d654000 || // 141.101.64.0/18
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(x & 0xfffe0000) == 0xa29e0000 || // 162.158.0.0/15
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(x & 0xfff80000) == 0xac400000 || // 172.64.0.0/13
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(x & 0xfffff000) == 0xadf53000 || // 173.245.48.0/20
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(x & 0xfffff000) == 0xbc726000 || // 188.114.96.0/20
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(x & 0xfffff000) == 0xbe5df000 || // 190.93.240.0/20
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(x & 0xfffffc00) == 0xc5eaf000 || // 197.234.240.0/22
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(x & 0xffff8000) == 0xc6298000; // 198.41.128.0/17
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}
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