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