/*
* INET An implementation of the TCP/IP protocol suite for the LINUX
* operating system. INET is implemented using the BSD Socket
* interface as the means of communication with the user level.
*
* Definitions of the Internet Protocol.
*
* Version: @(#)in.h 1.0.1 04/21/93
*
* Authors: Original taken from the GNU Project <netinet/in.h> file.
* Fred N. van Kempen, <[email protected]>
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version
* 2 of the License, or (at your option) any later version.
*/
#ifndef _LINUX_IN_H
#define _LINUX_IN_H


#include <linux/errno.h>
#include <uapi/linux/in.h>

static inline int proto_ports_offset(int proto)
{
switch (proto) {
case IPPROTO_TCP:
case IPPROTO_UDP:
case IPPROTO_DCCP:
case IPPROTO_ESP: /* SPI */
case IPPROTO_SCTP:
case IPPROTO_UDPLITE:
return 0;
case IPPROTO_AH: /* SPI */
return 4;
default:
return -EINVAL;
}
}

static inline bool ipv4_is_loopback(__be32 addr)
{
return (addr & htonl(0xff000000)) == htonl(0x7f000000);
}

static inline bool ipv4_is_multicast(__be32 addr)
{
return (addr & htonl(0xf0000000)) == htonl(0xe0000000);
}

static inline bool ipv4_is_local_multicast(__be32 addr)
{
return (addr & htonl(0xffffff00)) == htonl(0xe0000000);
}

static inline bool ipv4_is_lbcast(__be32 addr)
{
/* limited broadcast */
return addr == htonl(INADDR_BROADCAST);
}

static inline bool ipv4_is_zeronet(__be32 addr)
{
return (addr & htonl(0xff000000)) == htonl(0x00000000);
}

/* Special-Use IPv4 Addresses (RFC3330) */

static inline bool ipv4_is_private_10(__be32 addr)
{
return (addr & htonl(0xff000000)) == htonl(0x0a000000);
}

static inline bool ipv4_is_private_172(__be32 addr)
{
return (addr & htonl(0xfff00000)) == htonl(0xac100000);
}

static inline bool ipv4_is_private_192(__be32 addr)
{
return (addr & htonl(0xffff0000)) == htonl(0xc0a80000);
}

static inline bool ipv4_is_linklocal_169(__be32 addr)
{
return (addr & htonl(0xffff0000)) == htonl(0xa9fe0000);
}

static inline bool ipv4_is_anycast_6to4(__be32 addr)
{
return (addr & htonl(0xffffff00)) == htonl(0xc0586300);
}

static inline bool ipv4_is_test_192(__be32 addr)
{
return (addr & htonl(0xffffff00)) == htonl(0xc0000200);
}

static inline bool ipv4_is_test_198(__be32 addr)
{
return (addr & htonl(0xfffe0000)) == htonl(0xc6120000);
}
#endif /* _LINUX_IN_H */