root/include/linux/in.h

INCLUDED FROM

DEFINITIONS

1. proto_ports_offset
2. ipv4_is_loopback
3. ipv4_is_multicast
4. ipv4_is_local_multicast
5. ipv4_is_lbcast
6. ipv4_is_zeronet
7. ipv4_is_private_10
8. ipv4_is_private_172
9. ipv4_is_private_192
10. ipv4_is_linklocal_169
11. ipv4_is_anycast_6to4
12. ipv4_is_test_192
13. ipv4_is_test_198

/*
 * 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, <waltje@uWalt.NL.Mugnet.ORG>
 *
 *              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 */