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29 * @(#)socket.h 8.4 (Berkeley) 2/21/94
30 * $FreeBSD: src/sys/sys/socket.h,v 1.60 2002/04/20 02:24:35 mike Exp $
33 #ifndef _SYS_SOCKET_H_
34 #define _SYS_SOCKET_H_
36 #include <sys/types.h>
37 #include <sys/_types.h>
38 #include <netinet/in.h>
41 /* Needed by linuxthreads. */
43 # define __SOCKADDR_ARG struct sockaddr *__restrict
44 # define __CONST_SOCKADDR_ARG __const struct sockaddr *
47 * Definitions related to sockets: types, address families, options.
53 #ifdef _BSD_SA_FAMILY_T_
54 typedef _BSD_SA_FAMILY_T_ sa_family_t;
55 #undef _BSD_SA_FAMILY_T_
58 #ifdef _BSD_SOCKLEN_T_
59 typedef _BSD_SOCKLEN_T_ socklen_t;
60 #undef _BSD_SOCKLEN_T_
66 #define SOCK_STREAM 1 /* stream socket */
67 #define SOCK_DGRAM 2 /* datagram socket */
68 #define SOCK_RAW 3 /* raw-protocol interface */
69 #define SOCK_RDM 4 /* reliably-delivered message */
70 #define SOCK_SEQPACKET 5 /* sequenced packet stream */
73 * Option flags per-socket.
75 #define SO_DEBUG 0x0001 /* turn on debugging info recording */
76 #define SO_ACCEPTCONN 0x0002 /* socket has had listen() */
77 #define SO_REUSEADDR 0x0004 /* allow local address reuse */
78 #define SO_KEEPALIVE 0x0008 /* keep connections alive */
79 #define SO_DONTROUTE 0x0010 /* just use interface addresses */
80 #define SO_BROADCAST 0x0020 /* permit sending of broadcast msgs */
81 #define SO_USELOOPBACK 0x0040 /* bypass hardware when possible */
82 #define SO_LINGER 0x0080 /* linger on close if data present */
83 #define SO_OOBINLINE 0x0100 /* leave received OOB data in line */
84 #define SO_REUSEPORT 0x0200 /* allow local address & port reuse */
85 #define SO_TIMESTAMP 0x0400 /* timestamp received dgram traffic */
86 #define SO_ACCEPTFILTER 0x1000 /* there is an accept filter */
89 * Additional options, not kept in so_options.
91 #define SO_SNDBUF 0x1001 /* send buffer size */
92 #define SO_RCVBUF 0x1002 /* receive buffer size */
93 #define SO_SNDLOWAT 0x1003 /* send low-water mark */
94 #define SO_RCVLOWAT 0x1004 /* receive low-water mark */
95 #define SO_SNDTIMEO 0x1005 /* send timeout */
96 #define SO_RCVTIMEO 0x1006 /* receive timeout */
97 #define SO_ERROR 0x1007 /* get error status and clear */
98 #define SO_TYPE 0x1008 /* get socket type */
99 /*efine SO_PRIVSTATE 0x1009 get/deny privileged state */
102 * Structure used for manipulating linger option.
105 int l_onoff; /* option on/off */
106 int l_linger; /* linger time */
109 struct accept_filter_arg {
115 * Level number for (get/set)sockopt() to apply to socket itself.
117 #define SOL_SOCKET 0xffff /* options for socket level */
119 /* Protocol families. */
120 #define PF_UNSPEC 0 /* Unspecified. */
121 #define PF_LOCAL 1 /* Local to host (pipes and file-domain). */
122 #define PF_UNIX PF_LOCAL /* Old BSD name for PF_LOCAL. */
123 #define PF_FILE PF_LOCAL /* Another non-standard name for PF_LOCAL. */
124 #define PF_INET 2 /* IP protocol family. */
125 #define PF_AX25 3 /* Amateur Radio AX.25. */
126 #define PF_IPX 4 /* Novell Internet Protocol. */
127 #define PF_APPLETALK 5 /* Appletalk DDP. */
128 #define PF_NETROM 6 /* Amateur radio NetROM. */
129 #define PF_BRIDGE 7 /* Multiprotocol bridge. */
130 #define PF_ATMPVC 8 /* ATM PVCs. */
131 #define PF_X25 9 /* Reserved for X.25 project. */
132 #define PF_INET6 10 /* IP version 6. */
133 #define PF_ROSE 11 /* Amateur Radio X.25 PLP. */
134 #define PF_DECnet 12 /* Reserved for DECnet project. */
135 #define PF_NETBEUI 13 /* Reserved for 802.2LLC project. */
136 #define PF_SECURITY 14 /* Security callback pseudo AF. */
137 #define PF_KEY 15 /* PF_KEY key management API. */
138 #define PF_NETLINK 16
139 #define PF_ROUTE PF_NETLINK /* Alias to emulate 4.4BSD. */
140 #define PF_PACKET 17 /* Packet family. */
141 #define PF_ASH 18 /* Ash. */
142 #define PF_ECONET 19 /* Acorn Econet. */
143 #define PF_ATMSVC 20 /* ATM SVCs. */
144 #define PF_SNA 22 /* Linux SNA Project */
145 #define PF_IRDA 23 /* IRDA sockets. */
146 #define PF_PPPOX 24 /* PPPoX sockets. */
147 #define PF_WANPIPE 25 /* Wanpipe API sockets. */
148 #define PF_BLUETOOTH 31 /* Bluetooth sockets. */
149 #define PF_MAX 32 /* For now.. */
151 /* Address families. */
152 #define AF_UNSPEC PF_UNSPEC
153 #define AF_LOCAL PF_LOCAL
154 #define AF_UNIX PF_UNIX
155 #define AF_FILE PF_FILE
156 #define AF_INET PF_INET
157 #define AF_AX25 PF_AX25
158 #define AF_IPX PF_IPX
159 #define AF_APPLETALK PF_APPLETALK
160 #define AF_NETROM PF_NETROM
161 #define AF_BRIDGE PF_BRIDGE
162 #define AF_ATMPVC PF_ATMPVC
163 #define AF_X25 PF_X25
164 #define AF_INET6 PF_INET6
165 #define AF_ROSE PF_ROSE
166 #define AF_DECnet PF_DECnet
167 #define AF_NETBEUI PF_NETBEUI
168 #define AF_SECURITY PF_SECURITY
169 #define AF_KEY PF_KEY
170 #define AF_NETLINK PF_NETLINK
171 #define AF_ROUTE PF_ROUTE
172 #define AF_PACKET PF_PACKET
173 #define AF_ASH PF_ASH
174 #define AF_ECONET PF_ECONET
175 #define AF_ATMSVC PF_ATMSVC
176 #define AF_SNA PF_SNA
177 #define AF_IRDA PF_IRDA
178 #define AF_PPPOX PF_PPPOX
179 #define AF_WANPIPE PF_WANPIPE
180 #define AF_BLUETOOTH PF_BLUETOOTH
181 #define AF_MAX PF_MAX
184 * Structure used by kernel to store most
188 sa_family_t sa_family; /* address family */
189 char sa_data[14]; /* actually longer; address value */
191 #define SOCK_MAXADDRLEN 255 /* longest possible addresses */
194 * Structure used by kernel to pass protocol
195 * information in raw sockets.
198 u_short sp_family; /* address family */
199 u_short sp_protocol; /* protocol */
203 * RFC 2553: protocol-independent placeholder for socket addresses
205 #define _SS_MAXSIZE 128U
206 #define _SS_ALIGNSIZE (sizeof(int64_t))
207 #define _SS_PAD1SIZE (_SS_ALIGNSIZE - sizeof(unsigned char) - sizeof(sa_family_t))
208 #define _SS_PAD2SIZE (_SS_MAXSIZE - sizeof(unsigned char) - sizeof(sa_family_t) - \
209 _SS_PAD1SIZE - _SS_ALIGNSIZE)
211 struct sockaddr_storage {
212 unsigned char ss_len; /* address length */
213 sa_family_t ss_family; /* address family */
214 char __ss_pad1[_SS_PAD1SIZE];
215 int64_t __ss_align; /* force desired structure storage alignment */
216 char __ss_pad2[_SS_PAD2SIZE];
220 * Definitions for network related sysctl, CTL_NET.
222 * Second level is protocol family.
223 * Third level is protocol number.
225 * Further levels are defined by the individual families below.
227 #define NET_MAXID AF_MAX
229 #define CTL_NET_NAMES { \
231 { "unix", CTLTYPE_NODE }, \
232 { "inet", CTLTYPE_NODE }, \
233 { "implink", CTLTYPE_NODE }, \
234 { "pup", CTLTYPE_NODE }, \
235 { "chaos", CTLTYPE_NODE }, \
236 { "xerox_ns", CTLTYPE_NODE }, \
237 { "iso", CTLTYPE_NODE }, \
238 { "emca", CTLTYPE_NODE }, \
239 { "datakit", CTLTYPE_NODE }, \
240 { "ccitt", CTLTYPE_NODE }, \
241 { "ibm_sna", CTLTYPE_NODE }, \
242 { "decnet", CTLTYPE_NODE }, \
243 { "dec_dli", CTLTYPE_NODE }, \
244 { "lat", CTLTYPE_NODE }, \
245 { "hylink", CTLTYPE_NODE }, \
246 { "appletalk", CTLTYPE_NODE }, \
247 { "route", CTLTYPE_NODE }, \
248 { "link_layer", CTLTYPE_NODE }, \
249 { "xtp", CTLTYPE_NODE }, \
250 { "coip", CTLTYPE_NODE }, \
251 { "cnt", CTLTYPE_NODE }, \
252 { "rtip", CTLTYPE_NODE }, \
253 { "ipx", CTLTYPE_NODE }, \
254 { "sip", CTLTYPE_NODE }, \
255 { "pip", CTLTYPE_NODE }, \
256 { "isdn", CTLTYPE_NODE }, \
257 { "key", CTLTYPE_NODE }, \
258 { "inet6", CTLTYPE_NODE }, \
259 { "natm", CTLTYPE_NODE }, \
260 { "atm", CTLTYPE_NODE }, \
261 { "hdrcomplete", CTLTYPE_NODE }, \
262 { "netgraph", CTLTYPE_NODE }, \
263 { "snp", CTLTYPE_NODE }, \
264 { "scp", CTLTYPE_NODE }, \
268 * PF_ROUTE - Routing table
270 * Three additional levels are defined:
271 * Fourth: address family, 0 is wildcard
272 * Fifth: type of info, defined below
273 * Sixth: flag(s) to mask with for NET_RT_FLAGS
275 #define NET_RT_DUMP 1 /* dump; may limit to a.f. */
276 #define NET_RT_FLAGS 2 /* by flags, e.g. RESOLVING */
277 #define NET_RT_IFLIST 3 /* survey interface list */
278 #define NET_RT_MAXID 4
280 #define CTL_NET_RT_NAMES { \
282 { "dump", CTLTYPE_STRUCT }, \
283 { "flags", CTLTYPE_STRUCT }, \
284 { "iflist", CTLTYPE_STRUCT }, \
288 * Maximum queue length specifiable by listen.
291 #define SOMAXCONN 128
295 * Message header for recvmsg and sendmsg calls.
296 * Used value-result for recvmsg, value only for sendmsg.
299 void *msg_name; /* optional address */
300 socklen_t msg_namelen; /* size of address */
301 struct iovec *msg_iov; /* scatter/gather array */
302 int msg_iovlen; /* # elements in msg_iov */
303 void *msg_control; /* ancillary data, see below */
304 socklen_t msg_controllen; /* ancillary data buffer len */
305 int msg_flags; /* flags on received message */
308 #define MSG_OOB 0x1 /* process out-of-band data */
309 #define MSG_PEEK 0x2 /* peek at incoming message */
310 #define MSG_DONTROUTE 0x4 /* send without using routing tables */
311 #define MSG_EOR 0x8 /* data completes record */
312 #define MSG_TRUNC 0x10 /* data discarded before delivery */
313 #define MSG_CTRUNC 0x20 /* control data lost before delivery */
314 #define MSG_WAITALL 0x40 /* wait for full request or error */
315 #define MSG_DONTWAIT 0x80 /* this message should be nonblocking */
316 #define MSG_EOF 0x100 /* data completes connection */
317 #define MSG_COMPAT 0x8000 /* used in sendit() */
320 * Header for ancillary data objects in msg_control buffer.
321 * Used for additional information with/about a datagram
322 * not expressible by flags. The format is a sequence
323 * of message elements headed by cmsghdr structures.
326 socklen_t cmsg_len; /* data byte count, including hdr */
327 int cmsg_level; /* originating protocol */
328 int cmsg_type; /* protocol-specific type */
329 /* followed by unsigned char cmsg_data[]; */
333 * While we may have more groups than this, the cmsgcred struct must
334 * be able to fit in an mbuf, and NGROUPS_MAX is too large to allow
337 #define CMGROUP_MAX 16
340 * Credentials structure, used to verify the identity of a peer
341 * process that has sent us a message. This is allocated by the
342 * peer process but filled in by the kernel. This prevents the
343 * peer from lying about its identity. (Note that cmcred_groups[0]
344 * is the effective GID.)
347 pid_t cmcred_pid; /* PID of sending process */
348 uid_t cmcred_uid; /* real UID of sending process */
349 uid_t cmcred_euid; /* effective UID of sending process */
350 gid_t cmcred_gid; /* real GID of sending process */
351 short cmcred_ngroups; /* number or groups */
352 gid_t cmcred_groups[CMGROUP_MAX]; /* groups */
355 /* given pointer to struct cmsghdr, return pointer to data */
356 #define CMSG_DATA(cmsg) ((unsigned char *)(cmsg) + \
357 _ALIGN(sizeof(struct cmsghdr)))
359 /* given pointer to struct cmsghdr, return pointer to next cmsghdr */
360 #define CMSG_NXTHDR(mhdr, cmsg) \
361 (((caddr_t)(cmsg) + _ALIGN((cmsg)->cmsg_len) + \
362 _ALIGN(sizeof(struct cmsghdr)) > \
363 (caddr_t)(mhdr)->msg_control + (mhdr)->msg_controllen) ? \
364 (struct cmsghdr *)NULL : \
365 (struct cmsghdr *)((caddr_t)(cmsg) + _ALIGN((cmsg)->cmsg_len)))
367 #define CMSG_FIRSTHDR(mhdr) ((struct cmsghdr *)(mhdr)->msg_control)
369 /* RFC 2292 additions */
371 #define CMSG_SPACE(l) (_ALIGN(sizeof(struct cmsghdr)) + _ALIGN(l))
372 #define CMSG_LEN(l) (_ALIGN(sizeof(struct cmsghdr)) + (l))
375 #define CMSG_ALIGN(n) _ALIGN(n)
378 /* "Socket"-level control message types: */
379 #define SCM_RIGHTS 0x01 /* access rights (array of int) */
380 #define SCM_TIMESTAMP 0x02 /* timestamp (struct timeval) */
381 #define SCM_CREDS 0x03 /* process creds (struct cmsgcred) */
384 * 4.3 compat sockaddr, move to compat file later
387 u_short sa_family; /* address family */
388 char sa_data[14]; /* up to 14 bytes of direct address */
392 * 4.3-compat message header (move to compat file later).
395 caddr_t msg_name; /* optional address */
396 int msg_namelen; /* size of address */
397 struct iovec *msg_iov; /* scatter/gather array */
398 int msg_iovlen; /* # elements in msg_iov */
399 caddr_t msg_accrights; /* access rights sent/received */
400 int msg_accrightslen;
404 * howto arguments for shutdown(2), specified by Posix.1g.
406 #define SHUT_RD 0 /* shut down the reading side */
407 #define SHUT_WR 1 /* shut down the writing side */
408 #define SHUT_RDWR 2 /* shut down both sides */
411 * sendfile(2) header/trailer struct
414 struct iovec *headers; /* pointer to an array of header struct iovec's */
415 int hdr_cnt; /* number of header iovec's */
416 struct iovec *trailers; /* pointer to an array of trailer struct iovec's */
417 int trl_cnt; /* number of trailer iovec's */
420 #include <sys/cdefs.h>
423 int accept(int, struct sockaddr *, socklen_t *);
424 int bind(int, const struct sockaddr *, socklen_t);
425 int connect(int, const struct sockaddr *, socklen_t);
426 int getpeername(int, struct sockaddr *, socklen_t *);
427 int getsockname(int, struct sockaddr *, socklen_t *);
428 int getsockopt(int, int, int, void *, socklen_t *);
429 int listen(int, int);
430 ssize_t recv(int, void *, size_t, int);
431 ssize_t recvfrom(int, void *, size_t, int, struct sockaddr *, socklen_t *);
432 ssize_t recvmsg(int, struct msghdr *, int);
433 ssize_t send(int, const void *, size_t, int);
434 ssize_t sendto(int, const void *,
435 size_t, int, const struct sockaddr *, socklen_t);
436 ssize_t sendmsg(int, const struct msghdr *, int);
437 int sendfile(int, int, off_t, size_t, struct sf_hdtr *, off_t *, int);
438 int setsockopt(int, int, int, const void *, socklen_t);
439 int shutdown(int, int);
440 int socket(int, int, int);
441 int socketpair(int, int, int, int *);
444 #endif /* !_SYS_SOCKET_H_ */