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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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