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e16a7d8f3b
`et` means `expandtab`. ```sh rg 'vi: .* :vi' -l -0 | \ xargs -0 sed -i '' 's/vi: \(.*\) et\(.*\) :vi/vi: \1 xoet\2:vi/' rg 'vi: .* :vi' -l -0 | \ xargs -0 sed -i '' 's/vi: \(.*\)noet\(.*\):vi/vi: \1et\2 :vi/' rg 'vi: .* :vi' -l -0 | \ xargs -0 sed -i '' 's/vi: \(.*\)xoet\(.*\):vi/vi: \1noet\2:vi/' ```
44 lines
2.9 KiB
C
44 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 et ft=c ts=2 sts=2 sw=2 fenc=utf-8 :vi │
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╞══════════════════════════════════════════════════════════════════════════════╡
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│ Copyright 2021 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 IPv4 address is Globally Reachable.
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*
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* We intentionally omit TEST-NET here which can be used to simulate
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* public Internet traffic using non-Internet IPs.
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*
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* @return true 92.4499% of the time
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* @see IANA IPv4 Special-Purpose Address Registry
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*/
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bool IsPublicIp(uint32_t x) {
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return !((x & 0xffffffff) == 0x00000000 /* 0.0.0.0/32 */ ||
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(x & 0xff000000) == 0x00000000 /* 0.0.0.0/8 */ ||
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(x & 0xff000000) == 0x0a000000 /* 10.0.0.0/8 */ ||
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(x & 0xff000000) == 0x7f000000 /* 127.0.0.0/8 */ ||
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(x & 0xfff00000) == 0xac100000 /* 172.16.0.0/12 */ ||
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(x & 0xffffff00) == 0xc0000000 /* 192.0.0.0/24 */ ||
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(x & 0xffff0000) == 0xc0a80000 /* 192.168.0.0/16 */ ||
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(x & 0xffff0000) == 0xa9fe0000 /* 169.254.0.0/16 */ ||
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(x & 0xffc00000) == 0x64400000 /* 100.64.0.0/10 */ ||
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(x & 0xfffe0000) == 0xc6120000 /* 198.18.0.0/15 */ ||
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(x & 0xf0000000) == 0xf0000000 /* 240.0.0.0/4 */ ||
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(x & 0xffffffff) == 0xffffffff /* 255.255.255.255/32 */);
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}
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