1 /*
2  * INET		An implementation of the TCP/IP protocol suite for the LINUX
3  *		operating system.  INET is implemented using the  BSD Socket
4  *		interface as the means of communication with the user level.
5  *
6  *		Definitions of the Internet Protocol.
7  *
8  * Version:	@(#)in.h	1.0.1	04/21/93
9  *
10  * Authors:	Original taken from the GNU Project <netinet/in.h> file.
11  *		Fred N. van Kempen, <waltje@uWalt.NL.Mugnet.ORG>
12  *
13  *		This program is free software; you can redistribute it and/or
14  *		modify it under the terms of the GNU General Public License
15  *		as published by the Free Software Foundation; either version
16  *		2 of the License, or (at your option) any later version.
17  */
18 #ifndef _LINUX_IN_H
19 #define _LINUX_IN_H
20 
21 
22 #include <linux/errno.h>
23 #include <uapi/linux/in.h>
24 
proto_ports_offset(int proto)25 static inline int proto_ports_offset(int proto)
26 {
27 	switch (proto) {
28 	case IPPROTO_TCP:
29 	case IPPROTO_UDP:
30 	case IPPROTO_DCCP:
31 	case IPPROTO_ESP:	/* SPI */
32 	case IPPROTO_SCTP:
33 	case IPPROTO_UDPLITE:
34 		return 0;
35 	case IPPROTO_AH:	/* SPI */
36 		return 4;
37 	default:
38 		return -EINVAL;
39 	}
40 }
41 
ipv4_is_loopback(__be32 addr)42 static inline bool ipv4_is_loopback(__be32 addr)
43 {
44 	return (addr & htonl(0xff000000)) == htonl(0x7f000000);
45 }
46 
ipv4_is_multicast(__be32 addr)47 static inline bool ipv4_is_multicast(__be32 addr)
48 {
49 	return (addr & htonl(0xf0000000)) == htonl(0xe0000000);
50 }
51 
ipv4_is_local_multicast(__be32 addr)52 static inline bool ipv4_is_local_multicast(__be32 addr)
53 {
54 	return (addr & htonl(0xffffff00)) == htonl(0xe0000000);
55 }
56 
ipv4_is_lbcast(__be32 addr)57 static inline bool ipv4_is_lbcast(__be32 addr)
58 {
59 	/* limited broadcast */
60 	return addr == htonl(INADDR_BROADCAST);
61 }
62 
ipv4_is_zeronet(__be32 addr)63 static inline bool ipv4_is_zeronet(__be32 addr)
64 {
65 	return (addr & htonl(0xff000000)) == htonl(0x00000000);
66 }
67 
68 /* Special-Use IPv4 Addresses (RFC3330) */
69 
ipv4_is_private_10(__be32 addr)70 static inline bool ipv4_is_private_10(__be32 addr)
71 {
72 	return (addr & htonl(0xff000000)) == htonl(0x0a000000);
73 }
74 
ipv4_is_private_172(__be32 addr)75 static inline bool ipv4_is_private_172(__be32 addr)
76 {
77 	return (addr & htonl(0xfff00000)) == htonl(0xac100000);
78 }
79 
ipv4_is_private_192(__be32 addr)80 static inline bool ipv4_is_private_192(__be32 addr)
81 {
82 	return (addr & htonl(0xffff0000)) == htonl(0xc0a80000);
83 }
84 
ipv4_is_linklocal_169(__be32 addr)85 static inline bool ipv4_is_linklocal_169(__be32 addr)
86 {
87 	return (addr & htonl(0xffff0000)) == htonl(0xa9fe0000);
88 }
89 
ipv4_is_anycast_6to4(__be32 addr)90 static inline bool ipv4_is_anycast_6to4(__be32 addr)
91 {
92 	return (addr & htonl(0xffffff00)) == htonl(0xc0586300);
93 }
94 
ipv4_is_test_192(__be32 addr)95 static inline bool ipv4_is_test_192(__be32 addr)
96 {
97 	return (addr & htonl(0xffffff00)) == htonl(0xc0000200);
98 }
99 
ipv4_is_test_198(__be32 addr)100 static inline bool ipv4_is_test_198(__be32 addr)
101 {
102 	return (addr & htonl(0xfffe0000)) == htonl(0xc6120000);
103 }
104 #endif	/* _LINUX_IN_H */
105