| 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 |