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/*
* inet/inet_ntop.c
*/
#include <stdio.h>
#include <string.h>
#include <errno.h>
#include <sys/socket.h>
#include <arpa/inet.h>
#include <netinet/in6.h>
const char *inet_ntop(int af, const void *cp, char *buf, size_t len)
{
size_t xlen;
switch (af) {
case AF_INET:
{
const uint8_t *bp = (const uint8_t *)
&((const struct in_addr *)cp)->s_addr;
xlen = snprintf(buf, len, "%u.%u.%u.%u",
bp[0], bp[1], bp[2], bp[3]);
}
break;
case AF_INET6:
{
const struct in6_addr *s = (const struct in6_addr *)cp;
xlen = snprintf(buf, len, "%x:%x:%x:%x:%x:%x:%x:%x",
ntohs(s->s6_addr16[0]),
ntohs(s->s6_addr16[1]),
ntohs(s->s6_addr16[2]),
ntohs(s->s6_addr16[3]),
ntohs(s->s6_addr16[4]),
ntohs(s->s6_addr16[5]),
ntohs(s->s6_addr16[6]),
ntohs(s->s6_addr16[7]));
}
break;
default:
errno = EAFNOSUPPORT;
return NULL;
}
if (xlen > len) {
errno = ENOSPC;
return NULL;
}
return buf;
}
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