1/* System-specific socket constants and types.  Linux version.
2   Copyright (C) 1991, 92, 94, 95, 96, 97, 98 Free Software Foundation, Inc.
3   This file is part of the GNU C Library.
4
5   The GNU C Library is free software; you can redistribute it and/or
6   modify it under the terms of the GNU Library General Public License as
7   published by the Free Software Foundation; either version 2 of the
8   License, or (at your option) any later version.
9
10   The GNU C Library is distributed in the hope that it will be useful,
11   but WITHOUT ANY WARRANTY; without even the implied warranty of
12   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
13   Library General Public License for more details.
14
15   You should have received a copy of the GNU Library General Public
16   License along with the GNU C Library; see the file COPYING.LIB.  If not,
17   write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
18   Boston, MA 02111-1307, USA.  */
19
20#ifndef	_SOCKETBITS_H
21
22#define	_SOCKETBITS_H	1
23#include <features.h>
24
25#define	__need_size_t
26#define __need_NULL
27#include <stddef.h>
28
29
30__BEGIN_DECLS
31
32/* Type for length arguments in socket calls.  */
33#ifndef __socklen_t_defined
34typedef unsigned int socklen_t;
35# define __socklen_t_defined
36#endif
37
38/* Types of sockets.  */
39enum __socket_type
40{
41  SOCK_STREAM = 1,		/* Sequenced, reliable, connection-based
42				   byte streams.  */
43#define SOCK_STREAM SOCK_STREAM
44  SOCK_DGRAM = 2,		/* Connectionless, unreliable datagrams
45				   of fixed maximum length.  */
46#define SOCK_DGRAM SOCK_DGRAM
47  SOCK_RAW = 3,			/* Raw protocol interface.  */
48#define SOCK_RAW SOCK_RAW
49  SOCK_RDM = 4,			/* Reliably-delivered messages.  */
50#define SOCK_RDM SOCK_RDM
51  SOCK_SEQPACKET = 5,		/* Sequenced, reliable, connection-based,
52				   datagrams of fixed maximum length.  */
53#define SOCK_SEQPACKET SOCK_SEQPACKET
54  SOCK_PACKET = 10		/* Linux specific way of getting packets
55				   at the dev level.  For writing rarp and
56				   other similar things on the user level. */
57#define SOCK_PACKET SOCK_PACKET
58};
59
60/* Protocol families.  */
61#define	PF_UNSPEC	0	/* Unspecified.  */
62#define	PF_LOCAL	1	/* Local to host (pipes and file-domain).  */
63#define	PF_UNIX		PF_LOCAL /* Old BSD name for PF_LOCAL.  */
64#define	PF_FILE		PF_LOCAL /* POSIX name for PF_LOCAL.  */
65#define	PF_INET		2	/* IP protocol family.  */
66#define	PF_AX25		3	/* Amateur Radio AX.25.  */
67#define	PF_IPX		4	/* Novell Internet Protocol.  */
68#define	PF_APPLETALK	5	/* Don't use this.  */
69#define	PF_NETROM	6	/* Amateur radio NetROM.  */
70#define	PF_BRIDGE	7	/* Multiprotocol bridge.  */
71#define	PF_AAL5		8	/* Reserved for Werner's ATM.  */
72#define	PF_X25		9	/* Reserved for X.25 project.  */
73#define	PF_INET6	10	/* IP version 6.  */
74#define	PF_ROSE		11	/* Amateur Radio X.25 PLP       */
75#define	PF_DECnet	12	/* Reserved for DECnet project  */
76#define	PF_NETBEUI	13	/* Reserved for 802.2LLC project*/
77#define	PF_SECURITY	14	/* Security callback pseudo AF */
78#define	PF_KEY		15	/* PF_KEY key management API */
79#define	PF_NETLINK	16
80#define	PF_ROUTE	PF_NETLINK /* Alias to emulate 4.4BSD */
81#define	PF_PACKET	17	/* Packet family                */
82#define	PF_MAX		32	/* For now.. */
83
84/* Address families.  */
85#define	AF_UNSPEC	PF_UNSPEC
86#define	AF_LOCAL	PF_LOCAL
87#define	AF_UNIX		PF_UNIX
88#define	AF_FILE		PF_FILE
89#define	AF_INET		PF_INET
90#define	AF_AX25		PF_AX25
91#define	AF_IPX		PF_IPX
92#define	AF_APPLETALK	PF_APPLETALK
93#define	AF_NETROM	PF_NETROM
94#define	AF_BRIDGE	PF_BRIDGE
95#define	AF_AAL5		PF_AAL5
96#define	AF_X25		PF_X25
97#define	AF_INET6	PF_INET6
98#define	AF_ROSE		PF_ROSE
99#define	AF_DECnet	PF_DECnet
100#define	AF_NETBEUI	PF_NETBEUI
101#define	AF_SECURITY	PF_SECURITY
102#define	pseudo_AF_KEY	pseudo_PF_KEY
103#define	AF_NETLINK	PF_NETLINK
104#define	AF_ROUTE	PF_ROUTE
105#define	AF_PACKET	PF_PACKET
106#define	AF_MAX		PF_MAX
107
108/* Socket level values.  Others are defined in the appropriate headers.
109
110   XXX These definitions also should go into the appropriate headers as
111   far as they are available.  */
112#define SOL_IPV6        41
113#define SOL_ICMPV6	58
114#define SOL_RAW		255
115#define SOL_AX25        257
116#define SOL_ATALK	258
117#define SOL_NETROM	259
118#define SOL_ROSE	260
119#define SOL_DECNET	261
120#define SOL_X25		262
121
122/* Maximum queue length specifiable by listen.  */
123#define SOMAXCONN	128
124
125/* Get the definition of the macro to define the common sockaddr members.  */
126#if __GLIBC_MINOR__  >= 1
127#include <bits/sockaddr.h>
128#else
129#include <sockaddrcom.h>
130#endif
131
132/* Structure describing a generic socket address.  */
133struct sockaddr
134  {
135    __SOCKADDR_COMMON (sa_);	/* Common data: address family and length.  */
136    char sa_data[14];		/* Address data.  */
137  };
138
139
140/* Bits in the FLAGS argument to `send', `recv', et al.  */
141enum
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    MSG_CTRUNC		= 0x08,	/* Control data lost before delivery.  */
150#define MSG_CTRUNC	MSG_CTRUNC
151    MSG_PROXY		= 0x10,	/* Supply or ask second address.  */
152#define MSG_PROXY	MSG_PROXY
153    MSG_TRUNC		= 0x20,
154#define MSG_TRUNC	MSG_TRUNC
155    MSG_DONTWAIT	= 0x40,
156#define MSG_DONTWAIT	MSG_DONTWAIT
157    MSG_WAITALL		= 0x100,
158#define MSG_WAITALL	MSG_WAITALL
159    MSG_ERRQUEUE	= 0x2000,
160#define MSG_ERRQUEUE	MSG_ERRQUEUE
161    MSG_NOSIGNAL	= 0x4000,
162#define MSG_NOSIGNAL	MSG_NOSIGNAL
163  };
164
165
166/* Structure describing messages sent by
167   `sendmsg' and received by `recvmsg'.  */
168struct msghdr
169  {
170    __ptr_t msg_name;		/* Address to send to/receive from.  */
171    socklen_t msg_namelen;	/* Length of address data.  */
172
173    struct iovec *msg_iov;	/* Vector of data to send/receive into.  */
174    size_t msg_iovlen;		/* Number of elements in the vector.  */
175
176    __ptr_t msg_control;	/* Ancillary data (eg BSD filedesc passing). */
177    size_t msg_controllen;	/* Ancillary data buffer length.  */
178
179    int msg_flags;		/* Flags on received message.  */
180  };
181
182/* Structure used for storage of ancillary data object information.  */
183struct cmsghdr
184  {
185    size_t cmsg_len;		/* Length of data in cmsg_data plus length
186				   of cmsghdr structure.  */
187    int cmsg_level;		/* Originating protocol.  */
188    int cmsg_type;		/* Protocol specific type.  */
189#if !defined __STRICT_ANSI__ && defined __GNUC__ && __GNUC__ >= 2
190    unsigned char __cmsg_data[0]; /* Ancillary data.  */
191#endif
192  };
193
194/* Ancillary data object manipulation macros.  */
195#if !defined __STRICT_ANSI__ && defined __GNUC__ && __GNUC__ >= 2
196# define CMSG_DATA(cmsg) ((cmsg)->__cmsg_data)
197#else
198# define CMSG_DATA(cmsg) ((unsigned char *) ((struct cmsghdr *) (cmsg) + 1))
199#endif
200#define CMSG_NXTHDR(mhdr, cmsg) __cmsg_nxthdr (mhdr, cmsg)
201#define CMSG_FIRSTHDR(mhdr) \
202  ((size_t) (mhdr)->msg_controllen >= sizeof (struct cmsghdr)		      \
203   ? (struct cmsghdr *) (mhdr)->msg_control : (struct cmsghdr *) NULL)
204#define CMSG_ALIGN(len) ( ((len)+sizeof(long)-1) & ~(sizeof(long)-1) )
205#define CMSG_SPACE(len) (CMSG_ALIGN(sizeof(struct cmsghdr)) + CMSG_ALIGN(len))
206#define CMSG_LEN(len) (CMSG_ALIGN(sizeof(struct cmsghdr)) + (len))
207
208
209#ifndef _EXTERN_INLINE
210# define _EXTERN_INLINE extern __inline
211#endif
212extern struct cmsghdr *__cmsg_nxthdr __P ((struct msghdr *__mhdr,
213					   struct cmsghdr *__cmsg));
214_EXTERN_INLINE struct cmsghdr *
215__cmsg_nxthdr (struct msghdr *__mhdr, struct cmsghdr *__cmsg)
216{
217  if ((size_t) __cmsg->cmsg_len < sizeof (struct cmsghdr))
218	  /* The kernel header does this so there may be a reason.  */
219	  return NULL;
220
221  __cmsg = (struct cmsghdr *)
222	  ((unsigned char *) __cmsg + CMSG_ALIGN(__cmsg->cmsg_len));
223
224  if ( (unsigned char *) (__cmsg + 1) >=
225	   (unsigned char *) __mhdr->msg_control + __mhdr->msg_controllen)
226	  /* No more entries.  */
227	  return NULL;
228  return __cmsg;
229}
230
231/* Socket level message types.  This must match the definitions in
232   <linux/socket.h>.  */
233enum
234  {
235    SCM_RIGHTS = 0x01,         /* Data array contains access rights.  */
236#define SCM_RIGHTS SCM_RIGHTS
237    SCM_CREDENTIALS = 0x02,  /* Data array is `struct ucred'.  */
238#define SCM_CREDENTIALS SCM_CREDENTIALS
239  };
240
241
242
243/* Get socket manipulation related informations from kernel headers.  */
244#ifdef THIS_IS_CRAP
245#ifndef _LINUX_TYPES_H
246# define _LINUX_TYPES_H
247#endif
248#endif
249
250#include <asm/socket.h>
251#include <asm/types.h>
252
253struct ucred
254{
255	__u32	pid;
256	__u32	uid;
257	__u32	gid;
258};
259
260
261/* Structure used to manipulate the SO_LINGER option.  */
262struct linger
263  {
264    int l_onoff;		/* Nonzero to linger on close.  */
265    int l_linger;		/* Time to linger.  */
266  };
267
268__END_DECLS
269
270#endif /* socketbits.h */
271