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/*
* inet/inet_pton.c
*/
#include <stdio.h>
#include <stdint.h>
#include <errno.h>
#include <ctype.h>
#include <string.h>
#include <arpa/inet.h>
#include <netinet/in6.h>
static inline int hexval(int ch)
{
if ( ch >= '0' && ch <= '9' ) {
return ch-'0';
} else if ( ch >= 'A' && ch <= 'F' ) {
return ch-'A'+10;
} else if ( ch >= 'a' && ch <= 'f' ) {
return ch-'a'+10;
} else {
return -1;
}
}
int inet_pton(int af, const char *src, void *dst)
{
switch ( af ) {
case AF_INET:
return inet_aton(src, (struct in_addr *)dst);
case AF_INET6:
{
struct in6_addr *d = (struct in6_addr *)dst;
int colons = 0, dcolons = 0;
int i;
const char *p;
/* A double colon will increment colons by 2, dcolons by 1 */
for ( p = dst ; *p ; p++ ) {
if ( p[0] == ':' ) {
colons++;
if ( p[1] == ':' )
dcolons++;
} else if ( !isxdigit(*p) )
return 0; /* Not a valid address */
}
if ( colons > 7 || dcolons > 1 || (!dcolons && colons != 7) )
return 0; /* Not a valid address */
memset(d, 0, sizeof(struct in6_addr));
i = 0;
for ( p = dst ; *p ; p++ ) {
if ( *p == ':' ) {
if ( p[1] == ':' ) {
i += (8-colons);
} else {
i++;
}
} else {
d->s6_addr16[i] = htons((ntohs(d->s6_addr16[i]) << 4) + hexval(*p));
}
}
return 1;
}
default:
errno = EAFNOSUPPORT;
return -1;
}
}
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