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(Xbox) Provide implementation function for inet_ntop_compat

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This commit is contained in:
twinaphex 2017-09-13 03:05:28 +02:00
parent be367138f6
commit dd351a3501
1 changed files with 155 additions and 4 deletions
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151
libretro-common/net/net_compat.c
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@ -372,12 +372,163 @@ struct in_addr6_compat
unsigned char ip_addr[16];
};
#ifdef _XBOX
#ifndef IM_IN6ADDRSZ
#define IM_IN6ADDRSZ 16
#endif
#ifndef IM_INT16SZ
#define IM_INT16SZ 2
#endif
#ifndef IM_INADDRSZ
#define IM_INADDRSZ 4
#endif
/* Taken from https://github.com/skywind3000/easenet/blob/master/inetbase.c
*/
/* convert presentation format to network format */
static const char *
inet_ntop4x(const unsigned char *src, char *dst, size_t size)
{
char tmp[64];
size_t len = snprintf(tmp,
sizeof(tmp),
"%u.%u.%u.%u", src[0], src[1], src[2], src[3]);
if (len >= size)
goto error;
memcpy(dst, tmp, len + 1);
return dst;
error:
errno = ENOSPC;
return NULL;
}
/* convert presentation format to network format */
static const char *
inet_ntop6x(const unsigned char *src, char *dst, size_t size)
{
char tmp[64], *tp;
int i, inc;
struct { int base, len; } best, cur;
unsigned int words[IM_IN6ADDRSZ / IM_INT16SZ];
memset(words, '\0', sizeof(words));
best.base = best.len = 0;
cur.base = cur.len = 0;
for (i = 0; i < IM_IN6ADDRSZ; i++)
words[i / 2] |= (src[i] << ((1 - (i % 2)) << 3));
best.base = -1;
cur.base = -1;
for (i = 0; i < (IM_IN6ADDRSZ / IM_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)
{
if (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 < (IM_IN6ADDRSZ / IM_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_ntop4x(src+12, tp, sizeof(tmp) - (tp - tmp)))
return NULL;
tp += strlen(tp);
break;
}
inc = sprintf(tp, "%x", words[i]);
tp += inc;
}
if (best.base != -1 && (best.base + best.len) ==
(IM_IN6ADDRSZ / IM_INT16SZ))
*tp++ = ':';
*tp++ = '\0';
if ((size_t)(tp - tmp) > size)
goto error;
memcpy(dst, tmp, tp - tmp);
return dst;
error:
errno = ENOSPC;
return NULL;
}
/* convert network format to presentation format */
/* another inet_ntop, supports AF_INET/AF_INET6 */
static const char *isockaddr_ntop(int af,
const void *src, char *dst, size_t size)
{
switch (af)
{
case AF_INET:
return inet_ntop4x((const unsigned char*)src, dst, size);
#ifdef AF_INET6
case AF_INET6:
return inet_ntop6x((const unsigned char*)src, dst, size);
#endif
default:
if (af == -6)
return inet_ntop6x((const unsigned char*)src, dst, size);
errno = EAFNOSUPPORT;
return NULL;
}
}
#endif
const char *inet_ntop_compat(int af, const void *src, char *dst, socklen_t cnt)
{
#if defined(VITA) || defined(__ORBIS__)
return sceNetInetNtop(af,src,dst,cnt);
#elif defined(WIIU)
return inet_ntop(af, src, dst, cnt);
#elif defined(_XBOX)
return isockaddr_ntop(af, src, dst, cnt);
#elif defined(_WIN32)
if (af == AF_INET)
{