1 /* SPDX-License-Identifier: GPL-2.0-or-later */
2 /*
3 * INET An implementation of the TCP/IP protocol suite for the LINUX
4 * operating system. INET is implemented using the BSD Socket
5 * interface as the means of communication with the user level.
6 *
7 * Definitions of the Internet Protocol.
8 *
9 * Version: @(#)in.h 1.0.1 04/21/93
10 *
11 * Authors: Original taken from the GNU Project <netinet/in.h> file.
12 * Fred N. van Kempen, <waltje@uWalt.NL.Mugnet.ORG>
13 */
14 #ifndef _LINUX_IN_H
15 #define _LINUX_IN_H
16
17
18 #include <linux/errno.h>
19 #include <uapi/linux/in.h>
20
21 static inline int proto_ports_offset(int proto)
22 {
23 switch (proto) {
24 case IPPROTO_TCP:
25 case IPPROTO_UDP:
26 case IPPROTO_DCCP:
27 case IPPROTO_ESP: /* SPI */
28 case IPPROTO_SCTP:
29 case IPPROTO_UDPLITE:
30 return 0;
31 case IPPROTO_AH: /* SPI */
32 return 4;
33 default:
34 return -EINVAL;
35 }
36 }
37
38 static inline bool ipv4_is_loopback(__be32 addr)
39 {
40 return (addr & htonl(0xff000000)) == htonl(0x7f000000);
41 }
42
43 static inline bool ipv4_is_multicast(__be32 addr)
44 {
45 return (addr & htonl(0xf0000000)) == htonl(0xe0000000);
46 }
47
48 static inline bool ipv4_is_local_multicast(__be32 addr)
49 {
50 return (addr & htonl(0xffffff00)) == htonl(0xe0000000);
51 }
52
53 static inline bool ipv4_is_lbcast(__be32 addr)
54 {
55 /* limited broadcast */
56 return addr == htonl(INADDR_BROADCAST);
57 }
58
59 static inline bool ipv4_is_all_snoopers(__be32 addr)
60 {
61 return addr == htonl(INADDR_ALLSNOOPERS_GROUP);
62 }
63
64 static inline bool ipv4_is_zeronet(__be32 addr)
65 {
66 return (addr == 0);
67 }
68
69 /* Special-Use IPv4 Addresses (RFC3330) */
70
71 static inline bool ipv4_is_private_10(__be32 addr)
72 {
73 return (addr & htonl(0xff000000)) == htonl(0x0a000000);
74 }
75
76 static inline bool ipv4_is_private_172(__be32 addr)
77 {
78 return (addr & htonl(0xfff00000)) == htonl(0xac100000);
79 }
80
81 static inline bool ipv4_is_private_192(__be32 addr)
82 {
83 return (addr & htonl(0xffff0000)) == htonl(0xc0a80000);
84 }
85
86 static inline bool ipv4_is_linklocal_169(__be32 addr)
87 {
88 return (addr & htonl(0xffff0000)) == htonl(0xa9fe0000);
89 }
90
91 static inline bool ipv4_is_anycast_6to4(__be32 addr)
92 {
93 return (addr & htonl(0xffffff00)) == htonl(0xc0586300);
94 }
95
96 static inline bool ipv4_is_test_192(__be32 addr)
97 {
98 return (addr & htonl(0xffffff00)) == htonl(0xc0000200);
99 }
100
101 static inline bool ipv4_is_test_198(__be32 addr)
102 {
103 return (addr & htonl(0xfffe0000)) == htonl(0xc6120000);
104 }
105 #endif /* _LINUX_IN_H */
106
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