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
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
42 static inline bool ipv4_is_loopback(__be32 addr)
43 {
44 return (addr & htonl(0xff000000)) == htonl(0x7f000000);
45 }
46
47 static inline bool ipv4_is_multicast(__be32 addr)
48 {
49 return (addr & htonl(0xf0000000)) == htonl(0xe0000000);
50 }
51
52 static inline bool ipv4_is_local_multicast(__be32 addr)
53 {
54 return (addr & htonl(0xffffff00)) == htonl(0xe0000000);
55 }
56
57 static inline bool ipv4_is_lbcast(__be32 addr)
58 {
59 /* limited broadcast */
60 return addr == htonl(INADDR_BROADCAST);
61 }
62
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
70 static inline bool ipv4_is_private_10(__be32 addr)
71 {
72 return (addr & htonl(0xff000000)) == htonl(0x0a000000);
73 }
74
75 static inline bool ipv4_is_private_172(__be32 addr)
76 {
77 return (addr & htonl(0xfff00000)) == htonl(0xac100000);
78 }
79
80 static inline bool ipv4_is_private_192(__be32 addr)
81 {
82 return (addr & htonl(0xffff0000)) == htonl(0xc0a80000);
83 }
84
85 static inline bool ipv4_is_linklocal_169(__be32 addr)
86 {
87 return (addr & htonl(0xffff0000)) == htonl(0xa9fe0000);
88 }
89
90 static inline bool ipv4_is_anycast_6to4(__be32 addr)
91 {
92 return (addr & htonl(0xffffff00)) == htonl(0xc0586300);
93 }
94
95 static inline bool ipv4_is_test_192(__be32 addr)
96 {
97 return (addr & htonl(0xffffff00)) == htonl(0xc0000200);
98 }
99
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
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