#include "curl_setup.h"
#ifndef HAVE_INET_NTOP
#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
#define _MPRINTF_REPLACE
#include <curl/mprintf.h>
#include "inet_ntop.h"
#define IN6ADDRSZ 16
#define INADDRSZ 4
#define INT16SZ 2
static char *inet_ntop4 (const unsigned char *src, char *dst, size_t size)
{
char tmp[sizeof "255.255.255.255"];
size_t len;
DEBUGASSERT(size >= 16);
tmp[0] = '\0';
(void)snprintf(tmp, sizeof(tmp), "%d.%d.%d.%d",
((int)((unsigned char)src[0])) & 0xff,
((int)((unsigned char)src[1])) & 0xff,
((int)((unsigned char)src[2])) & 0xff,
((int)((unsigned char)src[3])) & 0xff);
len = strlen(tmp);
if(len == 0 || len >= size) {
SET_ERRNO(ENOSPC);
return (NULL);
}
strcpy(dst, tmp);
return dst;
}
#ifdef ENABLE_IPV6
static char *inet_ntop6 (const unsigned char *src, char *dst, size_t size)
{
char tmp[sizeof("ffff:ffff:ffff:ffff:ffff:ffff:255.255.255.255")];
char *tp;
struct {
long base;
long len;
} best, cur;
unsigned long words[IN6ADDRSZ / INT16SZ];
int i;
memset(words, '\0', sizeof(words));
for(i = 0; i < IN6ADDRSZ; i++)
words[i/2] |= (src[i] << ((1 - (i % 2)) << 3));
best.base = -1;
cur.base = -1;
best.len = 0;
cur.len = 0;
for(i = 0; i < (IN6ADDRSZ / INT16SZ); i++) {
if(words[i] == 0) {
if(cur.base == -1)
cur.base = i, cur.len = 1;
else
cur.len++;
}
else if(cur.base != -1) {
if(best.base == -1 || cur.len > best.len)
best = cur;
cur.base = -1;
}
}
if((cur.base != -1) && (best.base == -1 || cur.len > best.len))
best = cur;
if(best.base != -1 && best.len < 2)
best.base = -1;
tp = tmp;
for(i = 0; i < (IN6ADDRSZ / INT16SZ); i++) {
if(best.base != -1 && i >= best.base && i < (best.base + best.len)) {
if(i == best.base)
*tp++ = ':';
continue;
}
if(i != 0)
*tp++ = ':';
if(i == 6 && best.base == 0 &&
(best.len == 6 || (best.len == 5 && words[5] == 0xffff))) {
if(!inet_ntop4(src+12, tp, sizeof(tmp) - (tp - tmp))) {
SET_ERRNO(ENOSPC);
return (NULL);
}
tp += strlen(tp);
break;
}
tp += snprintf(tp, 5, "%lx", words[i]);
}
if(best.base != -1 && (best.base + best.len) == (IN6ADDRSZ / INT16SZ))
*tp++ = ':';
*tp++ = '\0';
if((size_t)(tp - tmp) > size) {
SET_ERRNO(ENOSPC);
return (NULL);
}
strcpy(dst, tmp);
return dst;
}
#endif
char *Curl_inet_ntop(int af, const void *src, char *buf, size_t size)
{
switch (af) {
case AF_INET:
return inet_ntop4((const unsigned char*)src, buf, size);
#ifdef ENABLE_IPV6
case AF_INET6:
return inet_ntop6((const unsigned char*)src, buf, size);
#endif
default:
SET_ERRNO(EAFNOSUPPORT);
return NULL;
}
}
#endif