in.h

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/*
 * 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 */