mirror of
https://github.com/RGBCube/serenity
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95 lines
3.5 KiB
C
95 lines
3.5 KiB
C
/*
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* Copyright (c) 2018-2020, Andreas Kling <kling@serenityos.org>
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*
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* SPDX-License-Identifier: BSD-2-Clause
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*/
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#pragma once
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// Includes essentially mandated by POSIX:
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// https://pubs.opengroup.org/onlinepubs/9699919799/basedefs/netinet_in.h.html
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#include <inttypes.h>
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#include <sys/socket.h>
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#include <Kernel/API/POSIX/netinet/in.h>
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#include <endian.h>
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#include <sys/cdefs.h>
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__BEGIN_DECLS
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in_addr_t inet_addr(char const*);
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static inline uint16_t htons(uint16_t value)
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{
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#if __BYTE_ORDER == __LITTLE_ENDIAN
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return __builtin_bswap16(value);
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#else
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return value;
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#endif
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}
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static inline uint16_t ntohs(uint16_t value)
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{
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return htons(value);
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}
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static inline uint32_t htonl(uint32_t value)
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{
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#if __BYTE_ORDER == __LITTLE_ENDIAN
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return __builtin_bswap32(value);
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#else
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return value;
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#endif
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}
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static inline uint32_t ntohl(uint32_t value)
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{
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return htonl(value);
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}
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#define IN_CLASSA(addr) ((((uint32_t)(addr)) & (128 << 24)) == 0)
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#define IN_CLASSB(addr) ((((uint32_t)(addr)) & (192 << 24)) == (128 << 24))
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#define IN_MULTICAST(x) (((x)&0xf0000000) == 0xe0000000)
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// NOTE: The IPv6 Addressing Scheme that we detect are documented in RFC# 2373.
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// See: https://datatracker.ietf.org/doc/html/rfc2373
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// RFC# 2373 - 2.5.3 The Loopback Address
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#define IN6_IS_ADDR_LOOPBACK(addr) \
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((addr)->s6_addr[0] == 0 && (addr)->s6_addr[1] == 0 && (addr)->s6_addr[2] == 0 && (addr)->s6_addr[3] == 0 && (addr)->s6_addr[4] == 0 && (addr)->s6_addr[5] == 0 && (addr)->s6_addr[6] == 0 && (addr)->s6_addr[7] == 0 && (addr)->s6_addr[8] == 0 && (addr)->s6_addr[9] == 0 && (addr)->s6_addr[10] == 0 && (addr)->s6_addr[11] == 0 && (addr)->s6_addr[12] == 0 && (addr)->s6_addr[13] == 0 && (addr)->s6_addr[14] == 0 && (addr)->s6_addr[15] == 1)
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// RFC# 2373 - 2.5.4 IPv6 Addresses with Embedded IPv4 Addresses
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#define IN6_IS_ADDR_V4COMPAT(addr) \
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((addr)->s6_addr32[0] == 0 && ((addr)->s6_addr32[1]) == 0 && ((addr)->s6_addr32[2]) == 0 && ntohl((addr)->s6_addr32[3]) >= 2)
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#define IN6_IS_ADDR_V4MAPPED(addr) \
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((((addr)->s6_addr[0]) == 0) && (((addr)->s6_addr[1]) == 0) && (((addr)->s6_addr[2]) == 0) && (((addr)->s6_addr[3]) == 0) && (((addr)->s6_addr[4]) == 0) && (((addr)->s6_addr[5]) == 0) && (((addr)->s6_addr[6]) == 0) && (((addr)->s6_addr[7]) == 0) && (((addr)->s6_addr[8]) == 0) && (((addr)->s6_addr[9]) == 0) && (((addr)->s6_addr[10]) == 0xFF) && (((addr)->s6_addr[11]) == 0xFF))
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// RFC# 2373 - 2.5.8 Local-Use IPv6 Unicast Addresses
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#define IN6_IS_ADDR_LINKLOCAL(addr) \
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(((addr)->s6_addr[0] == 0xfe) && ((addr)->s6_addr[1] == 0x80) && ((addr)->s6_addr[2] == 0) && ((addr)->s6_addr[3] == 0) && (((addr)->s6_addr32[1]) == 0))
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#define IN6_IS_ADDR_SITELOCAL(addr) \
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((addr)->s6_addr[0] == 0xfe && (addr)->s6_addr[1] == 0xc0 && (addr)->s6_addr[2] == 0 && (addr)->s6_addr[3] == 0 && (addr)->s6_addr[4] == 0 && (addr)->s6_addr[5] == 0)
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// RFC# 2373 - 2.7 Multicast Addresses
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#define IN6_IS_ADDR_MULTICAST(addr) \
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((addr)->s6_addr[0] == 0xff)
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#define IN6_IS_ADDR_MC_NODELOCAL(addr) \
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(IN6_IS_ADDR_MULTICAST(addr) && (((addr)->s6_addr[1] & 0xf) == 0x1))
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#define IN6_IS_ADDR_MC_LINKLOCAL(addr) \
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(IN6_IS_ADDR_MULTICAST(addr) && (((addr)->s6_addr[1] & 0xf) == 0x2))
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#define IN6_IS_ADDR_MC_SITELOCAL(addr) \
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(IN6_IS_ADDR_MULTICAST(addr) && (((addr)->s6_addr[1] & 0xf) == 0x5))
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#define IN6_IS_ADDR_MC_ORGLOCAL(addr) \
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(IN6_IS_ADDR_MULTICAST(addr) && (((addr)->s6_addr[1] & 0xf) == 0x8))
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#define IN6_IS_ADDR_MC_GLOBAL(addr) \
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(IN6_IS_ADDR_MULTICAST(addr) && (((addr)->s6_addr[1] & 0xf) == 0xe))
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__END_DECLS
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