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