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Add IP address conversion helpers

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Fixes #47
This commit is contained in:
Justine Tunney 2021-02-20 22:52:46 -08:00
parent e345b42d78
commit 7a393c06fe
5 changed files with 167 additions and 1 deletions
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36
libc/sock/inet_ntoa.c Normal file
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/*-*- mode:c;indent-tabs-mode:nil;c-basic-offset:2;tab-width:8;coding:utf-8 -*-│
│vi: set net ft=c ts=2 sts=2 sw=2 fenc=utf-8 :vi│
╞══════════════════════════════════════════════════════════════════════════════╡
│ Copyright 2021 Justine Alexandra Roberts Tunney │
│ │
│ Permission to use, copy, modify, and/or distribute this software for │
│ any purpose with or without fee is hereby granted, provided that the │
│ above copyright notice and this permission notice appear in all copies. │
│ │
│ THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL │
│ WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED │
│ WARRANTIES OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE │
│ AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL │
│ DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR │
│ PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER │
│ TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR │
│ PERFORMANCE OF THIS SOFTWARE. │
╚─────────────────────────────────────────────────────────────────────────────*/
#include "libc/fmt/itoa.h"
#include "libc/sock/sock.h"
/**
* Converts IPv4 network address to array.
*/
char *inet_ntoa(struct in_addr in) {
static char buf[16];
char *p = buf;
p += int64toarray_radix10((in.s_addr >> 000) & 255, p);
*p++ = '.';
p += int64toarray_radix10((in.s_addr >> 010) & 255, p);
*p++ = '.';
p += int64toarray_radix10((in.s_addr >> 020) & 255, p);
*p++ = '.';
p += int64toarray_radix10((in.s_addr >> 030) & 255, p);
return buf;
}