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Justine Tunney 2020-06-15 07:18:57 -07:00
commit c91b3c5006
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libc/sock/inet_pton.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 2020 Justine Alexandra Roberts Tunney │
│ │
│ This program is free software; you can redistribute it and/or modify │
│ it under the terms of the GNU General Public License as published by │
│ the Free Software Foundation; version 2 of the License. │
│ │
│ This program is distributed in the hope that it will be useful, but │
│ WITHOUT ANY WARRANTY; without even the implied warranty of │
│ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU │
│ General Public License for more details. │
│ │
│ You should have received a copy of the GNU General Public License │
│ along with this program; if not, write to the Free Software │
│ Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA │
│ 02110-1301 USA │
╚─────────────────────────────────────────────────────────────────────────────*/
#include "libc/fmt/fmt.h"
#include "libc/sock/internal.h"
#include "libc/sock/sock.h"
#include "libc/sysv/errfuns.h"
#include "libc/sysv/consts/af.h"
#include "libc/sysv/consts/inaddr.h"
/**
* Converts internet address string to binary.
*
* @param af can be AF_INET
* @param src is the ASCII-encoded address
* @param dst is where the binary-encoded net-order address goes
* @return 1 on success, 0 on src malformed, or -1 w/ errno
*/
int inet_pton(int af, const char *src, void *dst) {
if (af == AF_INET) {
unsigned char *p = (unsigned char *)dst;
if (sscanf(src, "%hhu.%hhu.%hhu.%hhu", &p[0], &p[1], &p[2], &p[3]) == 4) {
return 1;
} else {
*(uint32_t *)dst = htonl(INADDR_TESTNET3);
return 0;
}
} else {
*(uint32_t *)dst = htonl(INADDR_TESTNET3);
return eafnosupport();
}
}