socket.h 10 KB

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  1. /* System-specific socket constants and types. Linux version.
  2. Copyright (C) 1991,92,94,95,96,97,98,99 Free Software Foundation, Inc.
  3. This file is part of the GNU C Library.
  4. The GNU C Library is free software; you can redistribute it and/or
  5. modify it under the terms of the GNU Library General Public License as
  6. published by the Free Software Foundation; either version 2 of the
  7. License, or (at your option) any later version.
  8. The GNU C Library is distributed in the hope that it will be useful,
  9. but WITHOUT ANY WARRANTY; without even the implied warranty of
  10. MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
  11. Library General Public License for more details.
  12. You should have received a copy of the GNU Library General Public
  13. License along with the GNU C Library; see the file COPYING.LIB. If not,
  14. write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
  15. Boston, MA 02111-1307, USA. */
  16. #ifndef __BITS_SOCKET_H
  17. #define __BITS_SOCKET_H
  18. #if !defined _SYS_SOCKET_H && !defined _NETINET_IN_H
  19. # error "Never include <bits/socket.h> directly; use <sys/socket.h> instead."
  20. #endif
  21. #define __need_size_t
  22. #define __need_NULL
  23. #include <stddef.h>
  24. #include <limits.h>
  25. #include <sys/types.h>
  26. /* Type for length arguments in socket calls. */
  27. typedef unsigned int socklen_t;
  28. /* Types of sockets. */
  29. enum __socket_type
  30. {
  31. SOCK_STREAM = 1, /* Sequenced, reliable, connection-based
  32. byte streams. */
  33. #define SOCK_STREAM SOCK_STREAM
  34. SOCK_DGRAM = 2, /* Connectionless, unreliable datagrams
  35. of fixed maximum length. */
  36. #define SOCK_DGRAM SOCK_DGRAM
  37. SOCK_RAW = 3, /* Raw protocol interface. */
  38. #define SOCK_RAW SOCK_RAW
  39. SOCK_RDM = 4, /* Reliably-delivered messages. */
  40. #define SOCK_RDM SOCK_RDM
  41. SOCK_SEQPACKET = 5, /* Sequenced, reliable, connection-based,
  42. datagrams of fixed maximum length. */
  43. #define SOCK_SEQPACKET SOCK_SEQPACKET
  44. SOCK_PACKET = 10 /* Linux specific way of getting packets
  45. at the dev level. For writing rarp and
  46. other similar things on the user level. */
  47. #define SOCK_PACKET SOCK_PACKET
  48. };
  49. /* Protocol families. */
  50. #define PF_UNSPEC 0 /* Unspecified. */
  51. #define PF_LOCAL 1 /* Local to host (pipes and file-domain). */
  52. #define PF_UNIX PF_LOCAL /* Old BSD name for PF_LOCAL. */
  53. #define PF_FILE PF_LOCAL /* Another non-standard name for PF_LOCAL. */
  54. #define PF_INET 2 /* IP protocol family. */
  55. #define PF_AX25 3 /* Amateur Radio AX.25. */
  56. #define PF_IPX 4 /* Novell Internet Protocol. */
  57. #define PF_APPLETALK 5 /* Appletalk DDP. */
  58. #define PF_NETROM 6 /* Amateur radio NetROM. */
  59. #define PF_BRIDGE 7 /* Multiprotocol bridge. */
  60. #define PF_ATMPVC 8 /* ATM PVCs. */
  61. #define PF_X25 9 /* Reserved for X.25 project. */
  62. #define PF_INET6 10 /* IP version 6. */
  63. #define PF_ROSE 11 /* Amateur Radio X.25 PLP. */
  64. #define PF_DECnet 12 /* Reserved for DECnet project. */
  65. #define PF_NETBEUI 13 /* Reserved for 802.2LLC project. */
  66. #define PF_SECURITY 14 /* Security callback pseudo AF. */
  67. #define PF_KEY 15 /* PF_KEY key management API. */
  68. #define PF_NETLINK 16
  69. #define PF_ROUTE PF_NETLINK /* Alias to emulate 4.4BSD. */
  70. #define PF_PACKET 17 /* Packet family. */
  71. #define PF_ASH 18 /* Ash. */
  72. #define PF_ECONET 19 /* Acorn Econet. */
  73. #define PF_ATMSVC 20 /* ATM SVCs. */
  74. #define PF_SNA 22 /* Linux SNA Project */
  75. #define PF_IRDA 23 /* IRDA sockets. */
  76. #define PF_MAX 32 /* For now.. */
  77. /* Address families. */
  78. #define AF_UNSPEC PF_UNSPEC
  79. #define AF_LOCAL PF_LOCAL
  80. #define AF_UNIX PF_UNIX
  81. #define AF_FILE PF_FILE
  82. #define AF_INET PF_INET
  83. #define AF_AX25 PF_AX25
  84. #define AF_IPX PF_IPX
  85. #define AF_APPLETALK PF_APPLETALK
  86. #define AF_NETROM PF_NETROM
  87. #define AF_BRIDGE PF_BRIDGE
  88. #define AF_ATMPVC PF_ATMPVC
  89. #define AF_X25 PF_X25
  90. #define AF_INET6 PF_INET6
  91. #define AF_ROSE PF_ROSE
  92. #define AF_DECnet PF_DECnet
  93. #define AF_NETBEUI PF_NETBEUI
  94. #define AF_SECURITY PF_SECURITY
  95. #define AF_KEY PF_KEY
  96. #define AF_NETLINK PF_NETLINK
  97. #define AF_ROUTE PF_ROUTE
  98. #define AF_PACKET PF_PACKET
  99. #define AF_ASH PF_ASH
  100. #define AF_ECONET PF_ECONET
  101. #define AF_ATMSVC PF_ATMSVC
  102. #define AF_SNA PF_SNA
  103. #define AF_IRDA PF_IRDA
  104. #define AF_MAX PF_MAX
  105. /* Socket level values. Others are defined in the appropriate headers.
  106. XXX These definitions also should go into the appropriate headers as
  107. far as they are available. */
  108. #define SOL_RAW 255
  109. #define SOL_DECNET 261
  110. #define SOL_X25 262
  111. #define SOL_PACKET 263
  112. #define SOL_ATM 264 /* ATM layer (cell level). */
  113. #define SOL_AAL 265 /* ATM Adaption Layer (packet level). */
  114. #define SOL_IRDA 266
  115. /* Maximum queue length specifiable by listen. */
  116. #define SOMAXCONN 128
  117. /* Get the definition of the macro to define the common sockaddr members. */
  118. #include <bits/sockaddr.h>
  119. /* Structure describing a generic socket address. */
  120. struct sockaddr
  121. {
  122. __SOCKADDR_COMMON (sa_); /* Common data: address family and length. */
  123. char sa_data[14]; /* Address data. */
  124. };
  125. /* Structure large enough to hold any socket address (with the historical
  126. exception of AF_UNIX). We reserve 128 bytes. */
  127. #if ULONG_MAX > 0xffffffff
  128. # define __ss_aligntype __uint64_t
  129. #else
  130. # define __ss_aligntype __uint32_t
  131. #endif
  132. #define _SS_SIZE 128
  133. #define _SS_PADSIZE (_SS_SIZE - (2 * sizeof (__ss_aligntype)))
  134. struct sockaddr_storage
  135. {
  136. __SOCKADDR_COMMON (__ss_); /* Address family, etc. */
  137. __ss_aligntype __ss_align; /* Force desired alignment. */
  138. char __ss_padding[_SS_PADSIZE];
  139. };
  140. /* Bits in the FLAGS argument to `send', `recv', et al. */
  141. enum
  142. {
  143. MSG_OOB = 0x01, /* Process out-of-band data. */
  144. #define MSG_OOB MSG_OOB
  145. MSG_PEEK = 0x02, /* Peek at incoming messages. */
  146. #define MSG_PEEK MSG_PEEK
  147. MSG_DONTROUTE = 0x04, /* Don't use local routing. */
  148. #define MSG_DONTROUTE MSG_DONTROUTE
  149. #ifdef __USE_GNU
  150. /* DECnet uses a different name. */
  151. MSG_TRYHARD = MSG_DONTROUTE,
  152. # define MSG_TRYHARD MSG_DONTROUTE
  153. #endif
  154. MSG_CTRUNC = 0x08, /* Control data lost before delivery. */
  155. #define MSG_CTRUNC MSG_CTRUNC
  156. MSG_PROXY = 0x10, /* Supply or ask second address. */
  157. #define MSG_PROXY MSG_PROXY
  158. MSG_TRUNC = 0x20,
  159. #define MSG_TRUNC MSG_TRUNC
  160. MSG_DONTWAIT = 0x40, /* Nonblocking IO. */
  161. #define MSG_DONTWAIT MSG_DONTWAIT
  162. MSG_EOR = 0x80, /* End of record. */
  163. #define MSG_EOR MSG_EOR
  164. MSG_WAITALL = 0x100, /* Wait for a full request. */
  165. #define MSG_WAITALL MSG_WAITALL
  166. MSG_FIN = 0x200,
  167. #define MSG_FIN MSG_FIN
  168. MSG_SYN = 0x400,
  169. #define MSG_SYN MSG_SYN
  170. MSG_URG = 0x800,
  171. #define MSG_URG MSG_URG
  172. MSG_RST = 0x1000,
  173. #define MSG_RST MSG_RST
  174. MSG_ERRQUEUE = 0x2000, /* Fetch message from error queue. */
  175. #define MSG_ERRQUEUE MSG_ERRQUEUE
  176. MSG_NOSIGNAL = 0x4000 /* Do not generate SIGPIPE. */
  177. #define MSG_NOSIGNAL MSG_NOSIGNAL
  178. };
  179. /* Structure describing messages sent by
  180. `sendmsg' and received by `recvmsg'. */
  181. struct msghdr
  182. {
  183. __ptr_t msg_name; /* Address to send to/receive from. */
  184. socklen_t msg_namelen; /* Length of address data. */
  185. struct iovec *msg_iov; /* Vector of data to send/receive into. */
  186. size_t msg_iovlen; /* Number of elements in the vector. */
  187. __ptr_t msg_control; /* Ancillary data (eg BSD filedesc passing). */
  188. size_t msg_controllen; /* Ancillary data buffer length. */
  189. int msg_flags; /* Flags on received message. */
  190. };
  191. /* Structure used for storage of ancillary data object information. */
  192. struct cmsghdr
  193. {
  194. size_t cmsg_len; /* Length of data in cmsg_data plus length
  195. of cmsghdr structure. */
  196. int cmsg_level; /* Originating protocol. */
  197. int cmsg_type; /* Protocol specific type. */
  198. #if !defined __STRICT_ANSI__ && defined __GNUC__ && __GNUC__ >= 2
  199. unsigned char __cmsg_data[0]; /* Ancillary data. */
  200. /* XXX Perhaps this should be removed. */
  201. #endif
  202. };
  203. /* Ancillary data object manipulation macros. */
  204. #if !defined __STRICT_ANSI__ && defined __GNUC__ && __GNUC__ >= 2
  205. # define CMSG_DATA(cmsg) ((cmsg)->__cmsg_data)
  206. #else
  207. # define CMSG_DATA(cmsg) ((unsigned char *) ((struct cmsghdr *) (cmsg) + 1))
  208. #endif
  209. #define CMSG_NXTHDR(mhdr, cmsg) __cmsg_nxthdr (mhdr, cmsg)
  210. #define CMSG_FIRSTHDR(mhdr) \
  211. ((size_t) (mhdr)->msg_controllen >= sizeof (struct cmsghdr) \
  212. ? (struct cmsghdr *) (mhdr)->msg_control : (struct cmsghdr *) NULL)
  213. #define CMSG_ALIGN(len) (((len) + sizeof (size_t) - 1) \
  214. & ~(sizeof (size_t) - 1))
  215. #define CMSG_SPACE(len) (CMSG_ALIGN (len) \
  216. + CMSG_ALIGN (sizeof (struct cmsghdr)))
  217. #define CMSG_LEN(len) (CMSG_ALIGN (sizeof (struct cmsghdr)) + (len))
  218. extern struct cmsghdr *__cmsg_nxthdr __P ((struct msghdr *__mhdr,
  219. struct cmsghdr *__cmsg));
  220. #ifdef __USE_EXTERN_INLINES
  221. # ifndef _EXTERN_INLINE
  222. # define _EXTERN_INLINE extern __inline
  223. # endif
  224. _EXTERN_INLINE struct cmsghdr *
  225. __cmsg_nxthdr (struct msghdr *__mhdr, struct cmsghdr *__cmsg)
  226. {
  227. if ((size_t) __cmsg->cmsg_len < sizeof (struct cmsghdr))
  228. /* The kernel header does this so there may be a reason. */
  229. return 0;
  230. __cmsg = (struct cmsghdr *) ((unsigned char *) __cmsg
  231. + CMSG_ALIGN (__cmsg->cmsg_len));
  232. if ((unsigned char *) (__cmsg + 1) >= ((unsigned char *) __mhdr->msg_control
  233. + __mhdr->msg_controllen)
  234. || ((unsigned char *) __cmsg + CMSG_ALIGN (__cmsg->cmsg_len)
  235. >= ((unsigned char *) __mhdr->msg_control + __mhdr->msg_controllen)))
  236. /* No more entries. */
  237. return 0;
  238. return __cmsg;
  239. }
  240. #endif /* Use `extern inline'. */
  241. /* Socket level message types. This must match the definitions in
  242. <linux/socket.h>. */
  243. enum
  244. {
  245. SCM_RIGHTS = 0x01, /* Transfer file descriptors. */
  246. #define SCM_RIGHTS SCM_RIGHTS
  247. #ifdef __USE_BSD
  248. SCM_CREDENTIALS = 0x02, /* Credentials passing. */
  249. # define SCM_CREDENTIALS SCM_CREDENTIALS
  250. #endif
  251. __SCM_CONNECT = 0x03 /* Data array is `struct scm_connect'. */
  252. };
  253. /* User visible structure for SCM_CREDENTIALS message */
  254. struct ucred
  255. {
  256. pid_t pid; /* PID of sending process. */
  257. uid_t uid; /* UID of sending process. */
  258. gid_t gid; /* GID of sending process. */
  259. };
  260. /* Get socket manipulation related informations from kernel headers. */
  261. #include <asm/socket.h>
  262. /* Structure used to manipulate the SO_LINGER option. */
  263. struct linger
  264. {
  265. int l_onoff; /* Nonzero to linger on close. */
  266. int l_linger; /* Time to linger. */
  267. };
  268. #endif /* bits/socket.h */