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#include <arpa/inet.h>
#include <bits/ensure.h>
#include <stdlib.h>
#include <ctype.h>
#include <stdio.h>
#include <errno.h>
#include <string.h>
#include <mlibc/bitutil.hpp>
#include <mlibc/debug.hpp>
const struct in6_addr in6addr_any = IN6ADDR_ANY_INIT;
const struct in6_addr in6addr_loopback = IN6ADDR_LOOPBACK_INIT;
uint32_t htonl(uint32_t x) {
#if __BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__
return mlibc::bit_util<uint32_t>::byteswap(x);
#else
return x;
#endif
}
uint16_t htons(uint16_t x) {
#if __BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__
return mlibc::bit_util<uint16_t>::byteswap(x);
#else
return x;
#endif
}
uint32_t ntohl(uint32_t x) {
#if __BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__
return mlibc::bit_util<uint32_t>::byteswap(x);
#else
return x;
#endif
}
uint16_t ntohs(uint16_t x) {
#if __BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__
return mlibc::bit_util<uint16_t>::byteswap(x);
#else
return x;
#endif
}
// ----------------------------------------------------------------------------
// IPv4 address manipulation.
// ----------------------------------------------------------------------------
in_addr_t inet_addr(const char *p) {
struct in_addr a;
if(!inet_aton(p, &a))
return -1;
return a.s_addr;
}
char *inet_ntoa(struct in_addr addr) {
// string: xxx.yyy.zzz.aaa
// 4 * 3 + 3 + 1 = 12 + 4 = 16
thread_local static char buffer[16];
uint32_t proper = htonl(addr.s_addr);
snprintf(buffer, sizeof(buffer), "%d.%d.%d.%d",
(proper >> 24) & 0xff, ((proper >> 16) & 0xff),
(proper >> 8) & 0xff, proper & 0xff);
return buffer;
}
int inet_aton(const char *string, struct in_addr *dest) {
int array[4];
int i = 0;
char *end;
for (; i < 4; i++) {
array[i] = strtoul(string, &end, 0);
if (*end && *end != '.')
return 0;
if (!*end)
break;
string = end + 1;
}
switch (i) {
case 0:
dest->s_addr = htonl(array[0]);
break;
case 1:
if (array[0] > 255 || array[1] > 0xffffff)
return 0;
dest->s_addr = htonl((array[0] << 24) | array[1]);
break;
case 2:
if (array[0] > 255 || array[1] > 255 ||
array[2] > 0xffff)
return 0;
dest->s_addr = htonl((array[0] << 24) | (array[1] << 16) |
array[2]);
break;
case 3:
if (array[0] > 255 || array[1] > 255 ||
array[2] > 255 || array[3] > 255)
return 0;
dest->s_addr = htonl((array[0] << 24) | (array[1] << 16) |
(array[2] << 8) | array[3]);
break;
}
return 1;
}
// ----------------------------------------------------------------------------
// Generic IP address manipulation.
// ----------------------------------------------------------------------------
const char *inet_ntop(int af, const void *__restrict src, char *__restrict dst,
socklen_t size) {
switch (af) {
case AF_INET: {
auto source = reinterpret_cast<const struct in_addr*>(src);
if (snprintf(dst, size, "%d.%d.%d.%d",
source->s_addr & 0xff,
(source->s_addr & 0xffff) >> 8,
(source->s_addr & 0xffffff) >> 16,
source->s_addr >> 24) < (int)size)
return dst;
break;
}
case AF_INET6: {
auto source = reinterpret_cast<const struct in6_addr*>(src);
size_t cur_zeroes_off = 0;
size_t cur_zeroes_len = 0;
size_t max_zeroes_off = 0;
size_t max_zeroes_len = 0;
/* we look for the largest block of zeroed quartet(s) */
for(size_t i = 0; i < 8; i++) {
auto ptr = source->s6_addr + (i * 2);
if(!ptr[0] && !ptr[1]) {
cur_zeroes_len++;
if(max_zeroes_len < cur_zeroes_len) {
max_zeroes_len = cur_zeroes_len;
max_zeroes_off = cur_zeroes_off;
}
} else {
/* advance the offset to the next quartet to check */
cur_zeroes_len = 0;
cur_zeroes_off = i + 1;
}
}
size_t off = 0;
for(size_t i = 0; i < 8; i++) {
auto ptr = source->s6_addr + (i * 2);
/* if we are at the beginning of the largest block of zeroed quartets, place "::" */
if(i == max_zeroes_off && max_zeroes_len >= 2) {
if(off < size) {
dst[off++] = ':';
}
if(off < size) {
dst[off++] = ':';
}
i += max_zeroes_len - 1;
continue;
}
/* place a colon if we're not at the beginning of the string and it is not already there */
if(off && dst[off - 1] != ':') {
if(off < size) {
dst[off++] = ':';
}
}
off += snprintf(dst + off, size - off, "%x", ptr[0] << 8 | ptr[1]);
}
dst[off] = 0;
return dst;
}
default:
errno = EAFNOSUPPORT;
return NULL;
}
errno = ENOSPC;
return NULL;
}
int inet_pton(int af, const char *__restrict src, void *__restrict dst) {
switch (af) {
case AF_INET: {
uint8_t array[4] = {};
for (int i = 0; i < 4; i++) {
char *end;
long int value = strtol(src, &end, 10);
if (value > 255)
return 0;
if (*end != '\0' && *end != '.')
return 0;
src = end + 1;
array[i] = value;
}
auto addr = reinterpret_cast<struct in_addr*>(dst);
memcpy(&addr->s_addr, array, 4);
break;
}
case AF_INET6:
mlibc::infoLogger() << "inet_pton: ipv6 is not implemented!" << frg::endlog;
/* fallthrough */
default:
errno = EAFNOSUPPORT;
return -1;
}
return 1;
}
struct in_addr inet_makeaddr(in_addr_t, in_addr_t) {
__ensure(!"Not implemented");
__builtin_unreachable();
}
in_addr_t inet_netof(struct in_addr) {
__ensure(!"Not implemented");
__builtin_unreachable();
}
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