include/linux/in.h

   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 */