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/*
* Copyright (c) 2018-2020, Andreas Kling <kling@serenityos.org>
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright notice, this
* list of conditions and the following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include <arpa/inet.h>
#include <errno.h>
#include <netinet/in.h>
#include <stdio.h>
extern "C" {
const char* inet_ntop(int af, const void* src, char* dst, socklen_t len)
{
if (af != AF_INET) {
errno = EAFNOSUPPORT;
return nullptr;
}
auto* bytes = (const unsigned char*)src;
snprintf(dst, len, "%u.%u.%u.%u", bytes[0], bytes[1], bytes[2], bytes[3]);
return (const char*)dst;
}
int inet_pton(int af, const char* src, void* dst)
{
if (af != AF_INET) {
errno = EAFNOSUPPORT;
return -1;
}
unsigned a;
unsigned b;
unsigned c;
unsigned d;
int count = sscanf(src, "%u.%u.%u.%u", &a, &b, &c, &d);
if (count != 4) {
errno = EINVAL;
return 0;
}
union {
struct {
uint8_t a;
uint8_t b;
uint8_t c;
uint8_t d;
};
uint32_t l;
} u;
u.a = a;
u.b = b;
u.c = c;
u.d = d;
*(uint32_t*)dst = u.l;
return 1;
}
in_addr_t inet_addr(const char* str)
{
in_addr_t tmp {};
int rc = inet_pton(AF_INET, str, &tmp);
if (rc < 0)
return INADDR_NONE;
return tmp;
}
char* inet_ntoa(struct in_addr in)
{
static char buffer[32];
inet_ntop(AF_INET, &in.s_addr, buffer, sizeof(buffer));
return buffer;
}
}
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