42 lines
1 KiB
C
42 lines
1 KiB
C
#include "inet_pton.h"
|
|
|
|
#include "wireless.h"
|
|
|
|
int inet_pton4(const char *src, unsigned char *dst) {
|
|
static const char digits[] = "0123456789";
|
|
int saw_digit, octets, ch;
|
|
unsigned char tmp[INADDRSZ], *tp;
|
|
|
|
saw_digit = 0;
|
|
octets = 0;
|
|
tp = tmp;
|
|
*tp = 0;
|
|
while ((ch = *src++) != '\0') {
|
|
const char *pch;
|
|
|
|
if ((pch = strchr(digits, ch)) != NULL) {
|
|
unsigned int val = *tp * 10 + (unsigned int)(pch - digits);
|
|
|
|
if (saw_digit && *tp == 0)
|
|
return (0);
|
|
if (val > 255)
|
|
return (0);
|
|
*tp = (unsigned char)val;
|
|
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);
|
|
memcpy(dst, tmp, INADDRSZ);
|
|
return (1);
|
|
}
|