in.h 7.9 KB

123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596979899100101102103104105106107108109110111112113114115116117118119120121122123124125126127128129130131132133134135136137138139140141142143144145146147148149150151152153154155156157158159160161162163164165166167168169170171172173174175176177178179180181182183184185186187188189190191192193194195196197198199200201202203204205206207208209210211212213214215216217218219220221222223224225226227228229230231232233234235236237238239240241242243244245246247248249250251252253254255256257
  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. #include <linux/types.h>
  21. #include <linux/socket.h>
  22. /* Standard well-defined IP protocols. */
  23. enum {
  24. IPPROTO_IP = 0, /* Dummy protocol for TCP */
  25. IPPROTO_ICMP = 1, /* Internet Control Message Protocol */
  26. IPPROTO_IGMP = 2, /* Internet Group Management Protocol */
  27. IPPROTO_IPIP = 4, /* IPIP tunnels (older KA9Q tunnels use 94) */
  28. IPPROTO_TCP = 6, /* Transmission Control Protocol */
  29. IPPROTO_EGP = 8, /* Exterior Gateway Protocol */
  30. IPPROTO_PUP = 12, /* PUP protocol */
  31. IPPROTO_UDP = 17, /* User Datagram Protocol */
  32. IPPROTO_IDP = 22, /* XNS IDP protocol */
  33. IPPROTO_DCCP = 33, /* Datagram Congestion Control Protocol */
  34. IPPROTO_RSVP = 46, /* RSVP protocol */
  35. IPPROTO_GRE = 47, /* Cisco GRE tunnels (rfc 1701,1702) */
  36. IPPROTO_IPV6 = 41, /* IPv6-in-IPv4 tunnelling */
  37. IPPROTO_ESP = 50, /* Encapsulation Security Payload protocol */
  38. IPPROTO_AH = 51, /* Authentication Header protocol */
  39. IPPROTO_BEETPH = 94, /* IP option pseudo header for BEET */
  40. IPPROTO_PIM = 103, /* Protocol Independent Multicast */
  41. IPPROTO_COMP = 108, /* Compression Header protocol */
  42. IPPROTO_SCTP = 132, /* Stream Control Transport Protocol */
  43. IPPROTO_UDPLITE = 136, /* UDP-Lite (RFC 3828) */
  44. IPPROTO_RAW = 255, /* Raw IP packets */
  45. IPPROTO_MAX
  46. };
  47. /* Internet address. */
  48. struct in_addr {
  49. __be32 s_addr;
  50. };
  51. #define IP_TOS 1
  52. #define IP_TTL 2
  53. #define IP_HDRINCL 3
  54. #define IP_OPTIONS 4
  55. #define IP_ROUTER_ALERT 5
  56. #define IP_RECVOPTS 6
  57. #define IP_RETOPTS 7
  58. #define IP_PKTINFO 8
  59. #define IP_PKTOPTIONS 9
  60. #define IP_MTU_DISCOVER 10
  61. #define IP_RECVERR 11
  62. #define IP_RECVTTL 12
  63. #define IP_RECVTOS 13
  64. #define IP_MTU 14
  65. #define IP_FREEBIND 15
  66. #define IP_IPSEC_POLICY 16
  67. #define IP_XFRM_POLICY 17
  68. #define IP_PASSSEC 18
  69. /* BSD compatibility */
  70. #define IP_RECVRETOPTS IP_RETOPTS
  71. /* IP_MTU_DISCOVER values */
  72. #define IP_PMTUDISC_DONT 0 /* Never send DF frames */
  73. #define IP_PMTUDISC_WANT 1 /* Use per route hints */
  74. #define IP_PMTUDISC_DO 2 /* Always DF */
  75. #define IP_MULTICAST_IF 32
  76. #define IP_MULTICAST_TTL 33
  77. #define IP_MULTICAST_LOOP 34
  78. #define IP_ADD_MEMBERSHIP 35
  79. #define IP_DROP_MEMBERSHIP 36
  80. #define IP_UNBLOCK_SOURCE 37
  81. #define IP_BLOCK_SOURCE 38
  82. #define IP_ADD_SOURCE_MEMBERSHIP 39
  83. #define IP_DROP_SOURCE_MEMBERSHIP 40
  84. #define IP_MSFILTER 41
  85. #define MCAST_JOIN_GROUP 42
  86. #define MCAST_BLOCK_SOURCE 43
  87. #define MCAST_UNBLOCK_SOURCE 44
  88. #define MCAST_LEAVE_GROUP 45
  89. #define MCAST_JOIN_SOURCE_GROUP 46
  90. #define MCAST_LEAVE_SOURCE_GROUP 47
  91. #define MCAST_MSFILTER 48
  92. #define MCAST_EXCLUDE 0
  93. #define MCAST_INCLUDE 1
  94. /* These need to appear somewhere around here */
  95. #define IP_DEFAULT_MULTICAST_TTL 1
  96. #define IP_DEFAULT_MULTICAST_LOOP 1
  97. /* Request struct for multicast socket ops */
  98. struct ip_mreq
  99. {
  100. struct in_addr imr_multiaddr; /* IP multicast address of group */
  101. struct in_addr imr_interface; /* local IP address of interface */
  102. };
  103. struct ip_mreqn
  104. {
  105. struct in_addr imr_multiaddr; /* IP multicast address of group */
  106. struct in_addr imr_address; /* local IP address of interface */
  107. int imr_ifindex; /* Interface index */
  108. };
  109. struct ip_mreq_source {
  110. __be32 imr_multiaddr;
  111. __be32 imr_interface;
  112. __be32 imr_sourceaddr;
  113. };
  114. struct ip_msfilter {
  115. __be32 imsf_multiaddr;
  116. __be32 imsf_interface;
  117. __u32 imsf_fmode;
  118. __u32 imsf_numsrc;
  119. __be32 imsf_slist[1];
  120. };
  121. #define IP_MSFILTER_SIZE(numsrc) \
  122. (sizeof(struct ip_msfilter) - sizeof(__u32) \
  123. + (numsrc) * sizeof(__u32))
  124. struct group_req
  125. {
  126. __u32 gr_interface; /* interface index */
  127. struct __kernel_sockaddr_storage gr_group; /* group address */
  128. };
  129. struct group_source_req
  130. {
  131. __u32 gsr_interface; /* interface index */
  132. struct __kernel_sockaddr_storage gsr_group; /* group address */
  133. struct __kernel_sockaddr_storage gsr_source; /* source address */
  134. };
  135. struct group_filter
  136. {
  137. __u32 gf_interface; /* interface index */
  138. struct __kernel_sockaddr_storage gf_group; /* multicast address */
  139. __u32 gf_fmode; /* filter mode */
  140. __u32 gf_numsrc; /* number of sources */
  141. struct __kernel_sockaddr_storage gf_slist[1]; /* interface index */
  142. };
  143. #define GROUP_FILTER_SIZE(numsrc) \
  144. (sizeof(struct group_filter) - sizeof(struct __kernel_sockaddr_storage) \
  145. + (numsrc) * sizeof(struct __kernel_sockaddr_storage))
  146. struct in_pktinfo
  147. {
  148. int ipi_ifindex;
  149. struct in_addr ipi_spec_dst;
  150. struct in_addr ipi_addr;
  151. };
  152. /* Structure describing an Internet (IP) socket address. */
  153. #define __SOCK_SIZE__ 16 /* sizeof(struct sockaddr) */
  154. struct sockaddr_in {
  155. sa_family_t sin_family; /* Address family */
  156. __be16 sin_port; /* Port number */
  157. struct in_addr sin_addr; /* Internet address */
  158. /* Pad to size of `struct sockaddr'. */
  159. unsigned char __pad[__SOCK_SIZE__ - sizeof(short int) -
  160. sizeof(unsigned short int) - sizeof(struct in_addr)];
  161. };
  162. #define sin_zero __pad /* for BSD UNIX comp. -FvK */
  163. /*
  164. * Definitions of the bits in an Internet address integer.
  165. * On subnets, host and network parts are found according
  166. * to the subnet mask, not these masks.
  167. */
  168. #define IN_CLASSA(a) ((((long int) (a)) & 0x80000000) == 0)
  169. #define IN_CLASSA_NET 0xff000000
  170. #define IN_CLASSA_NSHIFT 24
  171. #define IN_CLASSA_HOST (0xffffffff & ~IN_CLASSA_NET)
  172. #define IN_CLASSA_MAX 128
  173. #define IN_CLASSB(a) ((((long int) (a)) & 0xc0000000) == 0x80000000)
  174. #define IN_CLASSB_NET 0xffff0000
  175. #define IN_CLASSB_NSHIFT 16
  176. #define IN_CLASSB_HOST (0xffffffff & ~IN_CLASSB_NET)
  177. #define IN_CLASSB_MAX 65536
  178. #define IN_CLASSC(a) ((((long int) (a)) & 0xe0000000) == 0xc0000000)
  179. #define IN_CLASSC_NET 0xffffff00
  180. #define IN_CLASSC_NSHIFT 8
  181. #define IN_CLASSC_HOST (0xffffffff & ~IN_CLASSC_NET)
  182. #define IN_CLASSD(a) ((((long int) (a)) & 0xf0000000) == 0xe0000000)
  183. #define IN_MULTICAST(a) IN_CLASSD(a)
  184. #define IN_MULTICAST_NET 0xF0000000
  185. #define IN_EXPERIMENTAL(a) ((((long int) (a)) & 0xf0000000) == 0xf0000000)
  186. #define IN_BADCLASS(a) IN_EXPERIMENTAL((a))
  187. /* Address to accept any incoming messages. */
  188. #define INADDR_ANY ((unsigned long int) 0x00000000)
  189. /* Address to send to all hosts. */
  190. #define INADDR_BROADCAST ((unsigned long int) 0xffffffff)
  191. /* Address indicating an error return. */
  192. #define INADDR_NONE ((unsigned long int) 0xffffffff)
  193. /* Network number for local host loopback. */
  194. #define IN_LOOPBACKNET 127
  195. /* Address to loopback in software to local host. */
  196. #define INADDR_LOOPBACK 0x7f000001 /* 127.0.0.1 */
  197. #define IN_LOOPBACK(a) ((((long int) (a)) & 0xff000000) == 0x7f000000)
  198. /* Defines for Multicast INADDR */
  199. #define INADDR_UNSPEC_GROUP 0xe0000000U /* 224.0.0.0 */
  200. #define INADDR_ALLHOSTS_GROUP 0xe0000001U /* 224.0.0.1 */
  201. #define INADDR_ALLRTRS_GROUP 0xe0000002U /* 224.0.0.2 */
  202. #define INADDR_MAX_LOCAL_GROUP 0xe00000ffU /* 224.0.0.255 */
  203. /* <asm/byteorder.h> contains the htonl type stuff.. */
  204. #include <asm/byteorder.h>
  205. #ifdef __KERNEL__
  206. /* Some random defines to make it easier in the kernel.. */
  207. #define LOOPBACK(x) (((x) & htonl(0xff000000)) == htonl(0x7f000000))
  208. #define MULTICAST(x) (((x) & htonl(0xf0000000)) == htonl(0xe0000000))
  209. #define BADCLASS(x) (((x) & htonl(0xf0000000)) == htonl(0xf0000000))
  210. #define ZERONET(x) (((x) & htonl(0xff000000)) == htonl(0x00000000))
  211. #define LOCAL_MCAST(x) (((x) & htonl(0xFFFFFF00)) == htonl(0xE0000000))
  212. #endif
  213. #endif /* _LINUX_IN_H */