#include "curl_setup.h"
#ifndef HAVE_INET_PTON
#ifdef HAVE_SYS_PARAM_H
#include <sys/param.h>
#endif
#ifdef HAVE_NETINET_IN_H
#include <netinet/in.h>
#endif
#ifdef HAVE_ARPA_INET_H
#include <arpa/inet.h>
#endif
#include "inet_pton.h"
#define IN6ADDRSZ 16
#define INADDRSZ 4
#define INT16SZ 2
static int inet_pton4(const char *src, unsigned char *dst);
#ifdef ENABLE_IPV6
static int inet_pton6(const char *src, unsigned char *dst);
#endif
int
Curl_inet_pton(int af, const char *src, void *dst)
{
switch(af) {
case AF_INET:
return (inet_pton4(src, (unsigned char *)dst));
#ifdef ENABLE_IPV6
case AF_INET6:
return (inet_pton6(src, (unsigned char *)dst));
#endif
default:
errno = EAFNOSUPPORT;
return (-1);
}
}
static 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;
pch = strchr(digits, ch);
if(pch) {
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);
}
#ifdef ENABLE_IPV6
static int
inet_pton6(const char *src, unsigned char *dst)
{
static const char xdigits_l[] = "0123456789abcdef",
xdigits_u[] = "0123456789ABCDEF";
unsigned char tmp[IN6ADDRSZ], *tp, *endp, *colonp;
const char *xdigits, *curtok;
int ch, saw_xdigit;
size_t val;
memset((tp = tmp), 0, IN6ADDRSZ);
endp = tp + IN6ADDRSZ;
colonp = NULL;
if(*src == ':')
if(*++src != ':')
return (0);
curtok = src;
saw_xdigit = 0;
val = 0;
while((ch = *src++) != '\0') {
const char *pch;
pch = strchr((xdigits = xdigits_l), ch);
if(!pch)
pch = strchr((xdigits = xdigits_u), ch);
if(pch != NULL) {
val <<= 4;
val |= (pch - xdigits);
if(++saw_xdigit > 4)
return (0);
continue;
}
if(ch == ':') {
curtok = src;
if(!saw_xdigit) {
if(colonp)
return (0);
colonp = tp;
continue;
}
if(tp + INT16SZ > endp)
return (0);
*tp++ = (unsigned char) ((val >> 8) & 0xff);
*tp++ = (unsigned char) (val & 0xff);
saw_xdigit = 0;
val = 0;
continue;
}
if(ch == '.' && ((tp + INADDRSZ) <= endp) &&
inet_pton4(curtok, tp) > 0) {
tp += INADDRSZ;
saw_xdigit = 0;
break;
}
return (0);
}
if(saw_xdigit) {
if(tp + INT16SZ > endp)
return (0);
*tp++ = (unsigned char) ((val >> 8) & 0xff);
*tp++ = (unsigned char) (val & 0xff);
}
if(colonp != NULL) {
const ssize_t n = tp - colonp;
ssize_t 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, IN6ADDRSZ);
return (1);
}
#endif
#endif