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// MIT License, Copyright (c) 2020 Marvin Borner
// Most net/ip handlers are in the kernel space
// This is a userspace wrapper for some things
#include <def.h>
#include <libnet/net.h>
#include <mem.h>
#include <str.h>
// Inspired by Paul Vixie, 1996
int ip_pton(const char *src, u32 *dst)
{
const char *end = src + strlen(src);
u8 tmp[4], *tp;
int ch = 0;
int saw_digit = 0;
int octets = 0;
*(tp = tmp) = 0;
while (src < end) {
ch = *src++;
if (ch >= '0' && ch <= '9') {
u32 new = *tp * 10 + (ch - '0');
if ((saw_digit && *tp == 0) || new > 255)
return 0;
*tp = new;
if (!saw_digit) {
if (++octets > 4)
return 0;
saw_digit = 1;
}
} else if (ch == '.' && saw_digit) {
if (octets == 4)
return 0;
*++tp = 0;
saw_digit = 0;
} else {
return 0;
}
}
if (octets < 4)
return 0;
*dst = htonl(*(u32 *)tmp);
return 1;
}
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