#if defined(LIBC_SCCS) && !defined(lint)
static const char rcsid[] = "$Id: inet_pton.c,v 1.3.18.2 2005/07/28 07:38:07 marka Exp $";
#endif
#include <string.h>
#include <sys/param.h>
#include <sys/socket.h>
#include <sys/systm.h>
#include <netinet/in.h>
static int inet_pton4(const char *src, u_char *dst);
static int inet_pton6(const char *src, u_char *dst);
int
inet_pton(int af, const char *src, void *dst)
{
switch (af) {
case AF_INET:
return (inet_pton4(src, dst));
case AF_INET6:
return (inet_pton6(src, dst));
default:
return (-1);
}
}
static int
inet_pton4(const char *src, u_char *dst)
{
static const char digits[] = "0123456789";
int saw_digit, octets, ch;
#define NS_INADDRSZ 4
u_char tmp[NS_INADDRSZ], *tp;
saw_digit = 0;
octets = 0;
*(tp = tmp) = 0;
while ((ch = *src++) != '\0') {
const char *pch;
if ((pch = strchr(digits, ch)) != NULL) {
u_int new = *tp * 10 + (pch - digits);
if (saw_digit && *tp == 0)
return (0);
if (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);
memcpy(dst, tmp, NS_INADDRSZ);
return (1);
}
static int
inet_pton6(const char *src, u_char *dst)
{
static const char xdigits_l[] = "0123456789abcdef",
xdigits_u[] = "0123456789ABCDEF";
#define NS_IN6ADDRSZ 16
#define NS_INT16SZ 2
u_char tmp[NS_IN6ADDRSZ], *tp, *endp, *colonp;
const char *xdigits, *curtok;
int ch, seen_xdigits;
u_int val;
memset((tp = tmp), '\0', NS_IN6ADDRSZ);
endp = tp + NS_IN6ADDRSZ;
colonp = NULL;
if (*src == ':')
if (*++src != ':')
return (0);
curtok = src;
seen_xdigits = 0;
val = 0;
while ((ch = *src++) != '\0') {
const char *pch;
if ((pch = strchr((xdigits = xdigits_l), ch)) == NULL)
pch = strchr((xdigits = xdigits_u), ch);
if (pch != NULL) {
val <<= 4;
val |= (pch - xdigits);
if (++seen_xdigits > 4)
return (0);
continue;
}
if (ch == ':') {
curtok = src;
if (!seen_xdigits) {
if (colonp)
return (0);
colonp = tp;
continue;
} else if (*src == '\0') {
return (0);
}
if (tp + NS_INT16SZ > endp)
return (0);
*tp++ = (u_char) (val >> 8) & 0xff;
*tp++ = (u_char) val & 0xff;
seen_xdigits = 0;
val = 0;
continue;
}
if (ch == '.' && ((tp + NS_INADDRSZ) <= endp) &&
inet_pton4(curtok, tp) > 0) {
tp += NS_INADDRSZ;
seen_xdigits = 0;
break;
}
return (0);
}
if (seen_xdigits) {
if (tp + NS_INT16SZ > endp)
return (0);
*tp++ = (u_char) (val >> 8) & 0xff;
*tp++ = (u_char) val & 0xff;
}
if (colonp != NULL) {
const int n = tp - colonp;
int i;
if (tp == endp)
return (0);
for (i = 1; i <= n; i++) {
endp[- i] = colonp[n - i];
colonp[n - i] = 0;
}
tp = endp;
}
if (tp != endp)
return (0);
memcpy(dst, tmp, NS_IN6ADDRSZ);
return (1);
}