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 proto_ports_offset(int proto)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 ipv4_is_loopback(__be32 addr)38 static inline bool ipv4_is_loopback(__be32 addr) 39 { 40 return (addr & htonl(0xff000000)) == htonl(0x7f000000); 41 } 42 ipv4_is_multicast(__be32 addr)43 static inline bool ipv4_is_multicast(__be32 addr) 44 { 45 return (addr & htonl(0xf0000000)) == htonl(0xe0000000); 46 } 47 ipv4_is_local_multicast(__be32 addr)48 static inline bool ipv4_is_local_multicast(__be32 addr) 49 { 50 return (addr & htonl(0xffffff00)) == htonl(0xe0000000); 51 } 52 ipv4_is_lbcast(__be32 addr)53 static inline bool ipv4_is_lbcast(__be32 addr) 54 { 55 /* limited broadcast */ 56 return addr == htonl(INADDR_BROADCAST); 57 } 58 ipv4_is_all_snoopers(__be32 addr)59 static inline bool ipv4_is_all_snoopers(__be32 addr) 60 { 61 return addr == htonl(INADDR_ALLSNOOPERS_GROUP); 62 } 63 ipv4_is_zeronet(__be32 addr)64 static inline bool ipv4_is_zeronet(__be32 addr) 65 { 66 return (addr == 0); 67 } 68 69 /* Special-Use IPv4 Addresses (RFC3330) */ 70 ipv4_is_private_10(__be32 addr)71 static inline bool ipv4_is_private_10(__be32 addr) 72 { 73 return (addr & htonl(0xff000000)) == htonl(0x0a000000); 74 } 75 ipv4_is_private_172(__be32 addr)76 static inline bool ipv4_is_private_172(__be32 addr) 77 { 78 return (addr & htonl(0xfff00000)) == htonl(0xac100000); 79 } 80 ipv4_is_private_192(__be32 addr)81 static inline bool ipv4_is_private_192(__be32 addr) 82 { 83 return (addr & htonl(0xffff0000)) == htonl(0xc0a80000); 84 } 85 ipv4_is_linklocal_169(__be32 addr)86 static inline bool ipv4_is_linklocal_169(__be32 addr) 87 { 88 return (addr & htonl(0xffff0000)) == htonl(0xa9fe0000); 89 } 90 ipv4_is_anycast_6to4(__be32 addr)91 static inline bool ipv4_is_anycast_6to4(__be32 addr) 92 { 93 return (addr & htonl(0xffffff00)) == htonl(0xc0586300); 94 } 95 ipv4_is_test_192(__be32 addr)96 static inline bool ipv4_is_test_192(__be32 addr) 97 { 98 return (addr & htonl(0xffffff00)) == htonl(0xc0000200); 99 } 100 ipv4_is_test_198(__be32 addr)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