in.h 2.3 KB

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  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. #include <linux/errno.h>
  17. #include <uapi/linux/in.h>
  18. static inline int proto_ports_offset(int proto)
  19. {
  20. switch (proto) {
  21. case IPPROTO_TCP:
  22. case IPPROTO_UDP:
  23. case IPPROTO_DCCP:
  24. case IPPROTO_ESP: /* SPI */
  25. case IPPROTO_SCTP:
  26. case IPPROTO_UDPLITE:
  27. return 0;
  28. case IPPROTO_AH: /* SPI */
  29. return 4;
  30. default:
  31. return -EINVAL;
  32. }
  33. }
  34. static inline bool ipv4_is_loopback(__be32 addr)
  35. {
  36. return (addr & htonl(0xff000000)) == htonl(0x7f000000);
  37. }
  38. static inline bool ipv4_is_multicast(__be32 addr)
  39. {
  40. return (addr & htonl(0xf0000000)) == htonl(0xe0000000);
  41. }
  42. static inline bool ipv4_is_local_multicast(__be32 addr)
  43. {
  44. return (addr & htonl(0xffffff00)) == htonl(0xe0000000);
  45. }
  46. static inline bool ipv4_is_lbcast(__be32 addr)
  47. {
  48. /* limited broadcast */
  49. return addr == htonl(INADDR_BROADCAST);
  50. }
  51. static inline bool ipv4_is_all_snoopers(__be32 addr)
  52. {
  53. return addr == htonl(INADDR_ALLSNOOPERS_GROUP);
  54. }
  55. static inline bool ipv4_is_zeronet(__be32 addr)
  56. {
  57. return (addr == 0);
  58. }
  59. /* Special-Use IPv4 Addresses (RFC3330) */
  60. static inline bool ipv4_is_private_10(__be32 addr)
  61. {
  62. return (addr & htonl(0xff000000)) == htonl(0x0a000000);
  63. }
  64. static inline bool ipv4_is_private_172(__be32 addr)
  65. {
  66. return (addr & htonl(0xfff00000)) == htonl(0xac100000);
  67. }
  68. static inline bool ipv4_is_private_192(__be32 addr)
  69. {
  70. return (addr & htonl(0xffff0000)) == htonl(0xc0a80000);
  71. }
  72. static inline bool ipv4_is_linklocal_169(__be32 addr)
  73. {
  74. return (addr & htonl(0xffff0000)) == htonl(0xa9fe0000);
  75. }
  76. static inline bool ipv4_is_anycast_6to4(__be32 addr)
  77. {
  78. return (addr & htonl(0xffffff00)) == htonl(0xc0586300);
  79. }
  80. static inline bool ipv4_is_test_192(__be32 addr)
  81. {
  82. return (addr & htonl(0xffffff00)) == htonl(0xc0000200);
  83. }
  84. static inline bool ipv4_is_test_198(__be32 addr)
  85. {
  86. return (addr & htonl(0xfffe0000)) == htonl(0xc6120000);
  87. }
  88. #endif /* _LINUX_IN_H */