socket.h 9.7 KB

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  1. #ifndef _LINUX_SOCKET_H
  2. #define _LINUX_SOCKET_H
  3. /*
  4. * Desired design of maximum size and alignment (see RFC2553)
  5. */
  6. #define _K_SS_MAXSIZE 128 /* Implementation specific max size */
  7. #define _K_SS_ALIGNSIZE (__alignof__ (struct sockaddr *))
  8. /* Implementation specific desired alignment */
  9. struct __kernel_sockaddr_storage {
  10. unsigned short ss_family; /* address family */
  11. /* Following field(s) are implementation specific */
  12. char __data[_K_SS_MAXSIZE - sizeof(unsigned short)];
  13. /* space to achieve desired size, */
  14. /* _SS_MAXSIZE value minus size of ss_family */
  15. } __attribute__ ((aligned(_K_SS_ALIGNSIZE))); /* force desired alignment */
  16. #if defined(__KERNEL__) || !defined(__GLIBC__) || (__GLIBC__ < 2)
  17. #include <asm/socket.h> /* arch-dependent defines */
  18. #include <linux/sockios.h> /* the SIOCxxx I/O controls */
  19. #include <linux/uio.h> /* iovec support */
  20. #include <linux/types.h> /* pid_t */
  21. #include <linux/compiler.h> /* __user */
  22. extern int sysctl_somaxconn;
  23. #ifdef CONFIG_PROC_FS
  24. struct seq_file;
  25. extern void socket_seq_show(struct seq_file *seq);
  26. #endif
  27. typedef unsigned short sa_family_t;
  28. /*
  29. * 1003.1g requires sa_family_t and that sa_data is char.
  30. */
  31. struct sockaddr {
  32. sa_family_t sa_family; /* address family, AF_xxx */
  33. char sa_data[14]; /* 14 bytes of protocol address */
  34. };
  35. struct linger {
  36. int l_onoff; /* Linger active */
  37. int l_linger; /* How long to linger for */
  38. };
  39. #define sockaddr_storage __kernel_sockaddr_storage
  40. /*
  41. * As we do 4.4BSD message passing we use a 4.4BSD message passing
  42. * system, not 4.3. Thus msg_accrights(len) are now missing. They
  43. * belong in an obscure libc emulation or the bin.
  44. */
  45. struct msghdr {
  46. void * msg_name; /* Socket name */
  47. int msg_namelen; /* Length of name */
  48. struct iovec * msg_iov; /* Data blocks */
  49. __kernel_size_t msg_iovlen; /* Number of blocks */
  50. void * msg_control; /* Per protocol magic (eg BSD file descriptor passing) */
  51. __kernel_size_t msg_controllen; /* Length of cmsg list */
  52. unsigned msg_flags;
  53. };
  54. /*
  55. * POSIX 1003.1g - ancillary data object information
  56. * Ancillary data consits of a sequence of pairs of
  57. * (cmsghdr, cmsg_data[])
  58. */
  59. struct cmsghdr {
  60. __kernel_size_t cmsg_len; /* data byte count, including hdr */
  61. int cmsg_level; /* originating protocol */
  62. int cmsg_type; /* protocol-specific type */
  63. };
  64. /*
  65. * Ancilliary data object information MACROS
  66. * Table 5-14 of POSIX 1003.1g
  67. */
  68. #define __CMSG_NXTHDR(ctl, len, cmsg) __cmsg_nxthdr((ctl),(len),(cmsg))
  69. #define CMSG_NXTHDR(mhdr, cmsg) cmsg_nxthdr((mhdr), (cmsg))
  70. #define CMSG_ALIGN(len) ( ((len)+sizeof(long)-1) & ~(sizeof(long)-1) )
  71. #define CMSG_DATA(cmsg) ((void *)((char *)(cmsg) + CMSG_ALIGN(sizeof(struct cmsghdr))))
  72. #define CMSG_SPACE(len) (CMSG_ALIGN(sizeof(struct cmsghdr)) + CMSG_ALIGN(len))
  73. #define CMSG_LEN(len) (CMSG_ALIGN(sizeof(struct cmsghdr)) + (len))
  74. #define __CMSG_FIRSTHDR(ctl,len) ((len) >= sizeof(struct cmsghdr) ? \
  75. (struct cmsghdr *)(ctl) : \
  76. (struct cmsghdr *)NULL)
  77. #define CMSG_FIRSTHDR(msg) __CMSG_FIRSTHDR((msg)->msg_control, (msg)->msg_controllen)
  78. #define CMSG_OK(mhdr, cmsg) ((cmsg)->cmsg_len >= sizeof(struct cmsghdr) && \
  79. (cmsg)->cmsg_len <= (unsigned long) \
  80. ((mhdr)->msg_controllen - \
  81. ((char *)(cmsg) - (char *)(mhdr)->msg_control)))
  82. /*
  83. * This mess will go away with glibc
  84. */
  85. #ifdef __KERNEL__
  86. #define __KINLINE static inline
  87. #elif defined(__GNUC__)
  88. #define __KINLINE static __inline__
  89. #elif defined(__cplusplus)
  90. #define __KINLINE static inline
  91. #else
  92. #define __KINLINE static
  93. #endif
  94. /*
  95. * Get the next cmsg header
  96. *
  97. * PLEASE, do not touch this function. If you think, that it is
  98. * incorrect, grep kernel sources and think about consequences
  99. * before trying to improve it.
  100. *
  101. * Now it always returns valid, not truncated ancillary object
  102. * HEADER. But caller still MUST check, that cmsg->cmsg_len is
  103. * inside range, given by msg->msg_controllen before using
  104. * ancillary object DATA. --ANK (980731)
  105. */
  106. __KINLINE struct cmsghdr * __cmsg_nxthdr(void *__ctl, __kernel_size_t __size,
  107. struct cmsghdr *__cmsg)
  108. {
  109. struct cmsghdr * __ptr;
  110. __ptr = (struct cmsghdr*)(((unsigned char *) __cmsg) + CMSG_ALIGN(__cmsg->cmsg_len));
  111. if ((unsigned long)((char*)(__ptr+1) - (char *) __ctl) > __size)
  112. return (struct cmsghdr *)0;
  113. return __ptr;
  114. }
  115. __KINLINE struct cmsghdr * cmsg_nxthdr (struct msghdr *__msg, struct cmsghdr *__cmsg)
  116. {
  117. return __cmsg_nxthdr(__msg->msg_control, __msg->msg_controllen, __cmsg);
  118. }
  119. /* "Socket"-level control message types: */
  120. #define SCM_RIGHTS 0x01 /* rw: access rights (array of int) */
  121. #define SCM_CREDENTIALS 0x02 /* rw: struct ucred */
  122. #define SCM_SECURITY 0x03 /* rw: security label */
  123. struct ucred {
  124. __u32 pid;
  125. __u32 uid;
  126. __u32 gid;
  127. };
  128. /* Supported address families. */
  129. #define AF_UNSPEC 0
  130. #define AF_UNIX 1 /* Unix domain sockets */
  131. #define AF_LOCAL 1 /* POSIX name for AF_UNIX */
  132. #define AF_INET 2 /* Internet IP Protocol */
  133. #define AF_AX25 3 /* Amateur Radio AX.25 */
  134. #define AF_IPX 4 /* Novell IPX */
  135. #define AF_APPLETALK 5 /* AppleTalk DDP */
  136. #define AF_NETROM 6 /* Amateur Radio NET/ROM */
  137. #define AF_BRIDGE 7 /* Multiprotocol bridge */
  138. #define AF_ATMPVC 8 /* ATM PVCs */
  139. #define AF_X25 9 /* Reserved for X.25 project */
  140. #define AF_INET6 10 /* IP version 6 */
  141. #define AF_ROSE 11 /* Amateur Radio X.25 PLP */
  142. #define AF_DECnet 12 /* Reserved for DECnet project */
  143. #define AF_NETBEUI 13 /* Reserved for 802.2LLC project*/
  144. #define AF_SECURITY 14 /* Security callback pseudo AF */
  145. #define AF_KEY 15 /* PF_KEY key management API */
  146. #define AF_NETLINK 16
  147. #define AF_ROUTE AF_NETLINK /* Alias to emulate 4.4BSD */
  148. #define AF_PACKET 17 /* Packet family */
  149. #define AF_ASH 18 /* Ash */
  150. #define AF_ECONET 19 /* Acorn Econet */
  151. #define AF_ATMSVC 20 /* ATM SVCs */
  152. #define AF_SNA 22 /* Linux SNA Project (nutters!) */
  153. #define AF_IRDA 23 /* IRDA sockets */
  154. #define AF_PPPOX 24 /* PPPoX sockets */
  155. #define AF_WANPIPE 25 /* Wanpipe API Sockets */
  156. #define AF_LLC 26 /* Linux LLC */
  157. #define AF_TIPC 30 /* TIPC sockets */
  158. #define AF_BLUETOOTH 31 /* Bluetooth sockets */
  159. #define AF_IUCV 32 /* IUCV sockets */
  160. #define AF_MAX 33 /* For now.. */
  161. /* Protocol families, same as address families. */
  162. #define PF_UNSPEC AF_UNSPEC
  163. #define PF_UNIX AF_UNIX
  164. #define PF_LOCAL AF_LOCAL
  165. #define PF_INET AF_INET
  166. #define PF_AX25 AF_AX25
  167. #define PF_IPX AF_IPX
  168. #define PF_APPLETALK AF_APPLETALK
  169. #define PF_NETROM AF_NETROM
  170. #define PF_BRIDGE AF_BRIDGE
  171. #define PF_ATMPVC AF_ATMPVC
  172. #define PF_X25 AF_X25
  173. #define PF_INET6 AF_INET6
  174. #define PF_ROSE AF_ROSE
  175. #define PF_DECnet AF_DECnet
  176. #define PF_NETBEUI AF_NETBEUI
  177. #define PF_SECURITY AF_SECURITY
  178. #define PF_KEY AF_KEY
  179. #define PF_NETLINK AF_NETLINK
  180. #define PF_ROUTE AF_ROUTE
  181. #define PF_PACKET AF_PACKET
  182. #define PF_ASH AF_ASH
  183. #define PF_ECONET AF_ECONET
  184. #define PF_ATMSVC AF_ATMSVC
  185. #define PF_SNA AF_SNA
  186. #define PF_IRDA AF_IRDA
  187. #define PF_PPPOX AF_PPPOX
  188. #define PF_WANPIPE AF_WANPIPE
  189. #define PF_LLC AF_LLC
  190. #define PF_TIPC AF_TIPC
  191. #define PF_BLUETOOTH AF_BLUETOOTH
  192. #define PF_IUCV AF_IUCV
  193. #define PF_MAX AF_MAX
  194. /* Maximum queue length specifiable by listen. */
  195. #define SOMAXCONN 128
  196. /* Flags we can use with send/ and recv.
  197. Added those for 1003.1g not all are supported yet
  198. */
  199. #define MSG_OOB 1
  200. #define MSG_PEEK 2
  201. #define MSG_DONTROUTE 4
  202. #define MSG_TRYHARD 4 /* Synonym for MSG_DONTROUTE for DECnet */
  203. #define MSG_CTRUNC 8
  204. #define MSG_PROBE 0x10 /* Do not send. Only probe path f.e. for MTU */
  205. #define MSG_TRUNC 0x20
  206. #define MSG_DONTWAIT 0x40 /* Nonblocking io */
  207. #define MSG_EOR 0x80 /* End of record */
  208. #define MSG_WAITALL 0x100 /* Wait for a full request */
  209. #define MSG_FIN 0x200
  210. #define MSG_SYN 0x400
  211. #define MSG_CONFIRM 0x800 /* Confirm path validity */
  212. #define MSG_RST 0x1000
  213. #define MSG_ERRQUEUE 0x2000 /* Fetch message from error queue */
  214. #define MSG_NOSIGNAL 0x4000 /* Do not generate SIGPIPE */
  215. #define MSG_MORE 0x8000 /* Sender will send more */
  216. #define MSG_EOF MSG_FIN
  217. #if defined(CONFIG_COMPAT)
  218. #define MSG_CMSG_COMPAT 0x80000000 /* This message needs 32 bit fixups */
  219. #else
  220. #define MSG_CMSG_COMPAT 0 /* We never have 32 bit fixups */
  221. #endif
  222. /* Setsockoptions(2) level. Thanks to BSD these must match IPPROTO_xxx */
  223. #define SOL_IP 0
  224. /* #define SOL_ICMP 1 No-no-no! Due to Linux :-) we cannot use SOL_ICMP=1 */
  225. #define SOL_TCP 6
  226. #define SOL_UDP 17
  227. #define SOL_IPV6 41
  228. #define SOL_ICMPV6 58
  229. #define SOL_SCTP 132
  230. #define SOL_UDPLITE 136 /* UDP-Lite (RFC 3828) */
  231. #define SOL_RAW 255
  232. #define SOL_IPX 256
  233. #define SOL_AX25 257
  234. #define SOL_ATALK 258
  235. #define SOL_NETROM 259
  236. #define SOL_ROSE 260
  237. #define SOL_DECNET 261
  238. #define SOL_X25 262
  239. #define SOL_PACKET 263
  240. #define SOL_ATM 264 /* ATM layer (cell level) */
  241. #define SOL_AAL 265 /* ATM Adaption Layer (packet level) */
  242. #define SOL_IRDA 266
  243. #define SOL_NETBEUI 267
  244. #define SOL_LLC 268
  245. #define SOL_DCCP 269
  246. #define SOL_NETLINK 270
  247. #define SOL_TIPC 271
  248. /* IPX options */
  249. #define IPX_TYPE 1
  250. #ifdef __KERNEL__
  251. extern int memcpy_fromiovec(unsigned char *kdata, struct iovec *iov, int len);
  252. extern int memcpy_fromiovecend(unsigned char *kdata, struct iovec *iov,
  253. int offset, int len);
  254. extern int csum_partial_copy_fromiovecend(unsigned char *kdata,
  255. struct iovec *iov,
  256. int offset,
  257. unsigned int len, __wsum *csump);
  258. extern int verify_iovec(struct msghdr *m, struct iovec *iov, char *address, int mode);
  259. extern int memcpy_toiovec(struct iovec *v, unsigned char *kdata, int len);
  260. extern int move_addr_to_user(void *kaddr, int klen, void __user *uaddr, int __user *ulen);
  261. extern int move_addr_to_kernel(void __user *uaddr, int ulen, void *kaddr);
  262. extern int put_cmsg(struct msghdr*, int level, int type, int len, void *data);
  263. #endif
  264. #endif /* not kernel and not glibc */
  265. #endif /* _LINUX_SOCKET_H */