/* SPDX-License-Identifier: GPL-2.0-or-later */
/*
* 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 >
*/
#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(0 xff000000)) == htonl(0 x7f000000);
}
static inline bool ipv4_is_multicast(__be32 addr)
{
return (addr & htonl(0 xf0000000)) == htonl(0 xe0000000);
}
static inline bool ipv4_is_local_multicast(__be32 addr)
{
return (addr & htonl(0 xffffff00)) == htonl(0 xe0000000);
}
static inline bool ipv4_is_lbcast(__be32 addr)
{
/* limited broadcast */
return addr == htonl(INADDR_BROADCAST);
}
static inline bool ipv4_is_all_snoopers(__be32 addr)
{
return addr == htonl(INADDR_ALLSNOOPERS_GROUP);
}
static inline bool ipv4_is_zeronet(__be32 addr)
{
return (addr == 0 );
}
/* Special-Use IPv4 Addresses (RFC3330) */
static inline bool ipv4_is_private_10(__be32 addr)
{
return (addr & htonl(0 xff000000)) == htonl(0 x0a000000);
}
static inline bool ipv4_is_private_172(__be32 addr)
{
return (addr & htonl(0 xfff00000)) == htonl(0 xac100000);
}
static inline bool ipv4_is_private_192(__be32 addr)
{
return (addr & htonl(0 xffff0000)) == htonl(0 xc0a80000);
}
static inline bool ipv4_is_linklocal_169(__be32 addr)
{
return (addr & htonl(0 xffff0000)) == htonl(0 xa9fe0000);
}
static inline bool ipv4_is_anycast_6to4(__be32 addr)
{
return (addr & htonl(0 xffffff00)) == htonl(0 xc0586300);
}
static inline bool ipv4_is_test_192(__be32 addr)
{
return (addr & htonl(0 xffffff00)) == htonl(0 xc0000200);
}
static inline bool ipv4_is_test_198(__be32 addr)
{
return (addr & htonl(0 xfffe0000)) == htonl(0 xc6120000);
}
#endif /* _LINUX_IN_H */
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