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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/' ```
57 lines
2.7 KiB
C
57 lines
2.7 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 2020 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 "libc/dns/dnsheader.h"
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#include "libc/serialize.h"
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#include "libc/sysv/errfuns.h"
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/**
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* Serializes DNS message h to wire.
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*
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* @return number of bytes written (always 12) or -1 w/ errno
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* @see pascalifydnsname()
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*/
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void SerializeDnsHeader(uint8_t p[restrict 12], const struct DnsHeader *h) {
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p[0x0] = h->id >> 8;
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p[0x1] = h->id;
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p[0x2] = h->bf1;
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p[0x3] = h->bf2;
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p[0x4] = h->qdcount >> 8;
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p[0x5] = h->qdcount;
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p[0x6] = h->ancount >> 8;
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p[0x7] = h->ancount;
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p[0x8] = h->nscount >> 8;
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p[0x9] = h->nscount;
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p[0xa] = h->arcount >> 8;
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p[0xb] = h->arcount;
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}
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/**
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* Serializes DNS message h to wire.
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*
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* @return number of bytes read (always 12) or -1 w/ errno
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*/
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void DeserializeDnsHeader(struct DnsHeader *h, const uint8_t p[restrict 12]) {
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h->id = READ16BE(p);
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h->bf1 = p[2];
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h->bf2 = p[3];
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h->qdcount = READ16BE(p + 4);
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h->ancount = READ16BE(p + 6);
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h->nscount = READ16BE(p + 8);
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h->arcount = READ16BE(p + 10);
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}
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