Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
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linux
1#ifndef _LINUX_SOCKET_H
2#define _LINUX_SOCKET_H
3
4/*
5 * Desired design of maximum size and alignment (see RFC2553)
6 */
7#define _K_SS_MAXSIZE 128 /* Implementation specific max size */
8#define _K_SS_ALIGNSIZE (__alignof__ (struct sockaddr *))
9 /* Implementation specific desired alignment */
10
11struct __kernel_sockaddr_storage {
12 unsigned short ss_family; /* address family */
13 /* Following field(s) are implementation specific */
14 char __data[_K_SS_MAXSIZE - sizeof(unsigned short)];
15 /* space to achieve desired size, */
16 /* _SS_MAXSIZE value minus size of ss_family */
17} __attribute__ ((aligned(_K_SS_ALIGNSIZE))); /* force desired alignment */
18
19#if defined(__KERNEL__) || !defined(__GLIBC__) || (__GLIBC__ < 2)
20
21#include <asm/socket.h> /* arch-dependent defines */
22#include <linux/sockios.h> /* the SIOCxxx I/O controls */
23#include <linux/uio.h> /* iovec support */
24#include <linux/types.h> /* pid_t */
25#include <linux/compiler.h> /* __user */
26
27extern int sysctl_somaxconn;
28#ifdef CONFIG_PROC_FS
29struct seq_file;
30extern void socket_seq_show(struct seq_file *seq);
31#endif
32
33typedef unsigned short sa_family_t;
34
35/*
36 * 1003.1g requires sa_family_t and that sa_data is char.
37 */
38
39struct sockaddr {
40 sa_family_t sa_family; /* address family, AF_xxx */
41 char sa_data[14]; /* 14 bytes of protocol address */
42};
43
44struct linger {
45 int l_onoff; /* Linger active */
46 int l_linger; /* How long to linger for */
47};
48
49#define sockaddr_storage __kernel_sockaddr_storage
50
51/*
52 * As we do 4.4BSD message passing we use a 4.4BSD message passing
53 * system, not 4.3. Thus msg_accrights(len) are now missing. They
54 * belong in an obscure libc emulation or the bin.
55 */
56
57struct msghdr {
58 void * msg_name; /* Socket name */
59 int msg_namelen; /* Length of name */
60 struct iovec * msg_iov; /* Data blocks */
61 __kernel_size_t msg_iovlen; /* Number of blocks */
62 void * msg_control; /* Per protocol magic (eg BSD file descriptor passing) */
63 __kernel_size_t msg_controllen; /* Length of cmsg list */
64 unsigned msg_flags;
65};
66
67/*
68 * POSIX 1003.1g - ancillary data object information
69 * Ancillary data consits of a sequence of pairs of
70 * (cmsghdr, cmsg_data[])
71 */
72
73struct cmsghdr {
74 __kernel_size_t cmsg_len; /* data byte count, including hdr */
75 int cmsg_level; /* originating protocol */
76 int cmsg_type; /* protocol-specific type */
77};
78
79/*
80 * Ancilliary data object information MACROS
81 * Table 5-14 of POSIX 1003.1g
82 */
83
84#define __CMSG_NXTHDR(ctl, len, cmsg) __cmsg_nxthdr((ctl),(len),(cmsg))
85#define CMSG_NXTHDR(mhdr, cmsg) cmsg_nxthdr((mhdr), (cmsg))
86
87#define CMSG_ALIGN(len) ( ((len)+sizeof(long)-1) & ~(sizeof(long)-1) )
88
89#define CMSG_DATA(cmsg) ((void *)((char *)(cmsg) + CMSG_ALIGN(sizeof(struct cmsghdr))))
90#define CMSG_SPACE(len) (CMSG_ALIGN(sizeof(struct cmsghdr)) + CMSG_ALIGN(len))
91#define CMSG_LEN(len) (CMSG_ALIGN(sizeof(struct cmsghdr)) + (len))
92
93#define __CMSG_FIRSTHDR(ctl,len) ((len) >= sizeof(struct cmsghdr) ? \
94 (struct cmsghdr *)(ctl) : \
95 (struct cmsghdr *)NULL)
96#define CMSG_FIRSTHDR(msg) __CMSG_FIRSTHDR((msg)->msg_control, (msg)->msg_controllen)
97#define CMSG_OK(mhdr, cmsg) ((cmsg)->cmsg_len >= sizeof(struct cmsghdr) && \
98 (cmsg)->cmsg_len <= (unsigned long) \
99 ((mhdr)->msg_controllen - \
100 ((char *)(cmsg) - (char *)(mhdr)->msg_control)))
101
102/*
103 * This mess will go away with glibc
104 */
105
106#ifdef __KERNEL__
107#define __KINLINE static inline
108#elif defined(__GNUC__)
109#define __KINLINE static __inline__
110#elif defined(__cplusplus)
111#define __KINLINE static inline
112#else
113#define __KINLINE static
114#endif
115
116
117/*
118 * Get the next cmsg header
119 *
120 * PLEASE, do not touch this function. If you think, that it is
121 * incorrect, grep kernel sources and think about consequences
122 * before trying to improve it.
123 *
124 * Now it always returns valid, not truncated ancillary object
125 * HEADER. But caller still MUST check, that cmsg->cmsg_len is
126 * inside range, given by msg->msg_controllen before using
127 * ancillary object DATA. --ANK (980731)
128 */
129
130__KINLINE struct cmsghdr * __cmsg_nxthdr(void *__ctl, __kernel_size_t __size,
131 struct cmsghdr *__cmsg)
132{
133 struct cmsghdr * __ptr;
134
135 __ptr = (struct cmsghdr*)(((unsigned char *) __cmsg) + CMSG_ALIGN(__cmsg->cmsg_len));
136 if ((unsigned long)((char*)(__ptr+1) - (char *) __ctl) > __size)
137 return (struct cmsghdr *)0;
138
139 return __ptr;
140}
141
142__KINLINE struct cmsghdr * cmsg_nxthdr (struct msghdr *__msg, struct cmsghdr *__cmsg)
143{
144 return __cmsg_nxthdr(__msg->msg_control, __msg->msg_controllen, __cmsg);
145}
146
147/* "Socket"-level control message types: */
148
149#define SCM_RIGHTS 0x01 /* rw: access rights (array of int) */
150#define SCM_CREDENTIALS 0x02 /* rw: struct ucred */
151#define SCM_SECURITY 0x03 /* rw: security label */
152
153struct ucred {
154 __u32 pid;
155 __u32 uid;
156 __u32 gid;
157};
158
159/* Supported address families. */
160#define AF_UNSPEC 0
161#define AF_UNIX 1 /* Unix domain sockets */
162#define AF_LOCAL 1 /* POSIX name for AF_UNIX */
163#define AF_INET 2 /* Internet IP Protocol */
164#define AF_AX25 3 /* Amateur Radio AX.25 */
165#define AF_IPX 4 /* Novell IPX */
166#define AF_APPLETALK 5 /* AppleTalk DDP */
167#define AF_NETROM 6 /* Amateur Radio NET/ROM */
168#define AF_BRIDGE 7 /* Multiprotocol bridge */
169#define AF_ATMPVC 8 /* ATM PVCs */
170#define AF_X25 9 /* Reserved for X.25 project */
171#define AF_INET6 10 /* IP version 6 */
172#define AF_ROSE 11 /* Amateur Radio X.25 PLP */
173#define AF_DECnet 12 /* Reserved for DECnet project */
174#define AF_NETBEUI 13 /* Reserved for 802.2LLC project*/
175#define AF_SECURITY 14 /* Security callback pseudo AF */
176#define AF_KEY 15 /* PF_KEY key management API */
177#define AF_NETLINK 16
178#define AF_ROUTE AF_NETLINK /* Alias to emulate 4.4BSD */
179#define AF_PACKET 17 /* Packet family */
180#define AF_ASH 18 /* Ash */
181#define AF_ECONET 19 /* Acorn Econet */
182#define AF_ATMSVC 20 /* ATM SVCs */
183#define AF_SNA 22 /* Linux SNA Project (nutters!) */
184#define AF_IRDA 23 /* IRDA sockets */
185#define AF_PPPOX 24 /* PPPoX sockets */
186#define AF_WANPIPE 25 /* Wanpipe API Sockets */
187#define AF_LLC 26 /* Linux LLC */
188#define AF_TIPC 30 /* TIPC sockets */
189#define AF_BLUETOOTH 31 /* Bluetooth sockets */
190#define AF_IUCV 32 /* IUCV sockets */
191#define AF_RXRPC 33 /* RxRPC sockets */
192#define AF_MAX 34 /* For now.. */
193
194/* Protocol families, same as address families. */
195#define PF_UNSPEC AF_UNSPEC
196#define PF_UNIX AF_UNIX
197#define PF_LOCAL AF_LOCAL
198#define PF_INET AF_INET
199#define PF_AX25 AF_AX25
200#define PF_IPX AF_IPX
201#define PF_APPLETALK AF_APPLETALK
202#define PF_NETROM AF_NETROM
203#define PF_BRIDGE AF_BRIDGE
204#define PF_ATMPVC AF_ATMPVC
205#define PF_X25 AF_X25
206#define PF_INET6 AF_INET6
207#define PF_ROSE AF_ROSE
208#define PF_DECnet AF_DECnet
209#define PF_NETBEUI AF_NETBEUI
210#define PF_SECURITY AF_SECURITY
211#define PF_KEY AF_KEY
212#define PF_NETLINK AF_NETLINK
213#define PF_ROUTE AF_ROUTE
214#define PF_PACKET AF_PACKET
215#define PF_ASH AF_ASH
216#define PF_ECONET AF_ECONET
217#define PF_ATMSVC AF_ATMSVC
218#define PF_SNA AF_SNA
219#define PF_IRDA AF_IRDA
220#define PF_PPPOX AF_PPPOX
221#define PF_WANPIPE AF_WANPIPE
222#define PF_LLC AF_LLC
223#define PF_TIPC AF_TIPC
224#define PF_BLUETOOTH AF_BLUETOOTH
225#define PF_IUCV AF_IUCV
226#define PF_RXRPC AF_RXRPC
227#define PF_MAX AF_MAX
228
229/* Maximum queue length specifiable by listen. */
230#define SOMAXCONN 128
231
232/* Flags we can use with send/ and recv.
233 Added those for 1003.1g not all are supported yet
234 */
235
236#define MSG_OOB 1
237#define MSG_PEEK 2
238#define MSG_DONTROUTE 4
239#define MSG_TRYHARD 4 /* Synonym for MSG_DONTROUTE for DECnet */
240#define MSG_CTRUNC 8
241#define MSG_PROBE 0x10 /* Do not send. Only probe path f.e. for MTU */
242#define MSG_TRUNC 0x20
243#define MSG_DONTWAIT 0x40 /* Nonblocking io */
244#define MSG_EOR 0x80 /* End of record */
245#define MSG_WAITALL 0x100 /* Wait for a full request */
246#define MSG_FIN 0x200
247#define MSG_SYN 0x400
248#define MSG_CONFIRM 0x800 /* Confirm path validity */
249#define MSG_RST 0x1000
250#define MSG_ERRQUEUE 0x2000 /* Fetch message from error queue */
251#define MSG_NOSIGNAL 0x4000 /* Do not generate SIGPIPE */
252#define MSG_MORE 0x8000 /* Sender will send more */
253
254#define MSG_EOF MSG_FIN
255
256#define MSG_CMSG_CLOEXEC 0x40000000 /* Set close_on_exit for file
257 descriptor received through
258 SCM_RIGHTS */
259#if defined(CONFIG_COMPAT)
260#define MSG_CMSG_COMPAT 0x80000000 /* This message needs 32 bit fixups */
261#else
262#define MSG_CMSG_COMPAT 0 /* We never have 32 bit fixups */
263#endif
264
265
266/* Setsockoptions(2) level. Thanks to BSD these must match IPPROTO_xxx */
267#define SOL_IP 0
268/* #define SOL_ICMP 1 No-no-no! Due to Linux :-) we cannot use SOL_ICMP=1 */
269#define SOL_TCP 6
270#define SOL_UDP 17
271#define SOL_IPV6 41
272#define SOL_ICMPV6 58
273#define SOL_SCTP 132
274#define SOL_UDPLITE 136 /* UDP-Lite (RFC 3828) */
275#define SOL_RAW 255
276#define SOL_IPX 256
277#define SOL_AX25 257
278#define SOL_ATALK 258
279#define SOL_NETROM 259
280#define SOL_ROSE 260
281#define SOL_DECNET 261
282#define SOL_X25 262
283#define SOL_PACKET 263
284#define SOL_ATM 264 /* ATM layer (cell level) */
285#define SOL_AAL 265 /* ATM Adaption Layer (packet level) */
286#define SOL_IRDA 266
287#define SOL_NETBEUI 267
288#define SOL_LLC 268
289#define SOL_DCCP 269
290#define SOL_NETLINK 270
291#define SOL_TIPC 271
292#define SOL_RXRPC 272
293#define SOL_PPPOL2TP 273
294
295/* IPX options */
296#define IPX_TYPE 1
297
298#ifdef __KERNEL__
299extern int memcpy_fromiovec(unsigned char *kdata, struct iovec *iov, int len);
300extern int memcpy_fromiovecend(unsigned char *kdata, struct iovec *iov,
301 int offset, int len);
302extern int csum_partial_copy_fromiovecend(unsigned char *kdata,
303 struct iovec *iov,
304 int offset,
305 unsigned int len, __wsum *csump);
306
307extern int verify_iovec(struct msghdr *m, struct iovec *iov, char *address, int mode);
308extern int memcpy_toiovec(struct iovec *v, unsigned char *kdata, int len);
309extern int move_addr_to_user(void *kaddr, int klen, void __user *uaddr, int __user *ulen);
310extern int move_addr_to_kernel(void __user *uaddr, int ulen, void *kaddr);
311extern int put_cmsg(struct msghdr*, int level, int type, int len, void *data);
312
313#endif
314#endif /* not kernel and not glibc */
315#endif /* _LINUX_SOCKET_H */