ipv6: fix array index in ip6_mc_add_src()
[deliverable/linux.git] / include / linux / socket.h
CommitLineData
1da177e4
LT
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
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DM
11typedef unsigned short __kernel_sa_family_t;
12
1da177e4 13struct __kernel_sockaddr_storage {
6602a4ba 14 __kernel_sa_family_t ss_family; /* address family */
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15 /* Following field(s) are implementation specific */
16 char __data[_K_SS_MAXSIZE - sizeof(unsigned short)];
17 /* space to achieve desired size, */
18 /* _SS_MAXSIZE value minus size of ss_family */
19} __attribute__ ((aligned(_K_SS_ALIGNSIZE))); /* force desired alignment */
20
9c501935 21#ifdef __KERNEL__
1da177e4 22
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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
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29struct pid;
30struct cred;
31
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CG
32#define __sockaddr_check_size(size) \
33 BUILD_BUG_ON(((size) > sizeof(struct __kernel_sockaddr_storage)))
34
2ad0d9d4 35#ifdef CONFIG_PROC_FS
20380731
ACM
36struct seq_file;
37extern void socket_seq_show(struct seq_file *seq);
2ad0d9d4 38#endif
20380731 39
6602a4ba 40typedef __kernel_sa_family_t sa_family_t;
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41
42/*
43 * 1003.1g requires sa_family_t and that sa_data is char.
44 */
45
46struct sockaddr {
47 sa_family_t sa_family; /* address family, AF_xxx */
48 char sa_data[14]; /* 14 bytes of protocol address */
49};
50
51struct linger {
52 int l_onoff; /* Linger active */
53 int l_linger; /* How long to linger for */
54};
55
56#define sockaddr_storage __kernel_sockaddr_storage
57
58/*
59 * As we do 4.4BSD message passing we use a 4.4BSD message passing
60 * system, not 4.3. Thus msg_accrights(len) are now missing. They
61 * belong in an obscure libc emulation or the bin.
62 */
63
64struct msghdr {
65 void * msg_name; /* Socket name */
66 int msg_namelen; /* Length of name */
67 struct iovec * msg_iov; /* Data blocks */
68 __kernel_size_t msg_iovlen; /* Number of blocks */
69 void * msg_control; /* Per protocol magic (eg BSD file descriptor passing) */
70 __kernel_size_t msg_controllen; /* Length of cmsg list */
71 unsigned msg_flags;
72};
73
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ACM
74/* For recvmmsg/sendmmsg */
75struct mmsghdr {
76 struct msghdr msg_hdr;
77 unsigned msg_len;
78};
79
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80/*
81 * POSIX 1003.1g - ancillary data object information
82 * Ancillary data consits of a sequence of pairs of
83 * (cmsghdr, cmsg_data[])
84 */
85
86struct cmsghdr {
87 __kernel_size_t cmsg_len; /* data byte count, including hdr */
88 int cmsg_level; /* originating protocol */
89 int cmsg_type; /* protocol-specific type */
90};
91
92/*
25985edc 93 * Ancillary data object information MACROS
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94 * Table 5-14 of POSIX 1003.1g
95 */
96
97#define __CMSG_NXTHDR(ctl, len, cmsg) __cmsg_nxthdr((ctl),(len),(cmsg))
98#define CMSG_NXTHDR(mhdr, cmsg) cmsg_nxthdr((mhdr), (cmsg))
99
100#define CMSG_ALIGN(len) ( ((len)+sizeof(long)-1) & ~(sizeof(long)-1) )
101
102#define CMSG_DATA(cmsg) ((void *)((char *)(cmsg) + CMSG_ALIGN(sizeof(struct cmsghdr))))
103#define CMSG_SPACE(len) (CMSG_ALIGN(sizeof(struct cmsghdr)) + CMSG_ALIGN(len))
104#define CMSG_LEN(len) (CMSG_ALIGN(sizeof(struct cmsghdr)) + (len))
105
106#define __CMSG_FIRSTHDR(ctl,len) ((len) >= sizeof(struct cmsghdr) ? \
107 (struct cmsghdr *)(ctl) : \
108 (struct cmsghdr *)NULL)
109#define CMSG_FIRSTHDR(msg) __CMSG_FIRSTHDR((msg)->msg_control, (msg)->msg_controllen)
110#define CMSG_OK(mhdr, cmsg) ((cmsg)->cmsg_len >= sizeof(struct cmsghdr) && \
111 (cmsg)->cmsg_len <= (unsigned long) \
112 ((mhdr)->msg_controllen - \
113 ((char *)(cmsg) - (char *)(mhdr)->msg_control)))
114
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115/*
116 * Get the next cmsg header
117 *
118 * PLEASE, do not touch this function. If you think, that it is
119 * incorrect, grep kernel sources and think about consequences
120 * before trying to improve it.
121 *
122 * Now it always returns valid, not truncated ancillary object
123 * HEADER. But caller still MUST check, that cmsg->cmsg_len is
124 * inside range, given by msg->msg_controllen before using
125 * ancillary object DATA. --ANK (980731)
126 */
127
9c501935 128static inline struct cmsghdr * __cmsg_nxthdr(void *__ctl, __kernel_size_t __size,
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LT
129 struct cmsghdr *__cmsg)
130{
131 struct cmsghdr * __ptr;
132
133 __ptr = (struct cmsghdr*)(((unsigned char *) __cmsg) + CMSG_ALIGN(__cmsg->cmsg_len));
134 if ((unsigned long)((char*)(__ptr+1) - (char *) __ctl) > __size)
135 return (struct cmsghdr *)0;
136
137 return __ptr;
138}
139
9c501935 140static inline struct cmsghdr * cmsg_nxthdr (struct msghdr *__msg, struct cmsghdr *__cmsg)
1da177e4
LT
141{
142 return __cmsg_nxthdr(__msg->msg_control, __msg->msg_controllen, __cmsg);
143}
144
145/* "Socket"-level control message types: */
146
147#define SCM_RIGHTS 0x01 /* rw: access rights (array of int) */
148#define SCM_CREDENTIALS 0x02 /* rw: struct ucred */
2c7946a7 149#define SCM_SECURITY 0x03 /* rw: security label */
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LT
150
151struct ucred {
152 __u32 pid;
153 __u32 uid;
154 __u32 gid;
155};
156
157/* Supported address families. */
158#define AF_UNSPEC 0
159#define AF_UNIX 1 /* Unix domain sockets */
160#define AF_LOCAL 1 /* POSIX name for AF_UNIX */
161#define AF_INET 2 /* Internet IP Protocol */
162#define AF_AX25 3 /* Amateur Radio AX.25 */
163#define AF_IPX 4 /* Novell IPX */
164#define AF_APPLETALK 5 /* AppleTalk DDP */
165#define AF_NETROM 6 /* Amateur Radio NET/ROM */
166#define AF_BRIDGE 7 /* Multiprotocol bridge */
167#define AF_ATMPVC 8 /* ATM PVCs */
168#define AF_X25 9 /* Reserved for X.25 project */
169#define AF_INET6 10 /* IP version 6 */
170#define AF_ROSE 11 /* Amateur Radio X.25 PLP */
171#define AF_DECnet 12 /* Reserved for DECnet project */
172#define AF_NETBEUI 13 /* Reserved for 802.2LLC project*/
173#define AF_SECURITY 14 /* Security callback pseudo AF */
174#define AF_KEY 15 /* PF_KEY key management API */
175#define AF_NETLINK 16
176#define AF_ROUTE AF_NETLINK /* Alias to emulate 4.4BSD */
177#define AF_PACKET 17 /* Packet family */
178#define AF_ASH 18 /* Ash */
179#define AF_ECONET 19 /* Acorn Econet */
180#define AF_ATMSVC 20 /* ATM SVCs */
8a7c4c77 181#define AF_RDS 21 /* RDS sockets */
1da177e4
LT
182#define AF_SNA 22 /* Linux SNA Project (nutters!) */
183#define AF_IRDA 23 /* IRDA sockets */
184#define AF_PPPOX 24 /* PPPoX sockets */
185#define AF_WANPIPE 25 /* Wanpipe API Sockets */
186#define AF_LLC 26 /* Linux LLC */
cd05acfe 187#define AF_CAN 29 /* Controller Area Network */
b97bf3fd 188#define AF_TIPC 30 /* TIPC sockets */
1da177e4 189#define AF_BLUETOOTH 31 /* Bluetooth sockets */
eac3731b 190#define AF_IUCV 32 /* IUCV sockets */
17926a79 191#define AF_RXRPC 33 /* RxRPC sockets */
04578dd3 192#define AF_ISDN 34 /* mISDN sockets */
bce7b154 193#define AF_PHONET 35 /* Phonet sockets */
fcb94e42 194#define AF_IEEE802154 36 /* IEEE802154 sockets */
70596b61 195#define AF_CAIF 37 /* CAIF sockets */
c2f9bff5 196#define AF_ALG 38 /* Algorithm sockets */
c7fe3b52
AAJ
197#define AF_NFC 39 /* NFC sockets */
198#define AF_MAX 40 /* For now.. */
1da177e4
LT
199
200/* Protocol families, same as address families. */
201#define PF_UNSPEC AF_UNSPEC
202#define PF_UNIX AF_UNIX
203#define PF_LOCAL AF_LOCAL
204#define PF_INET AF_INET
205#define PF_AX25 AF_AX25
206#define PF_IPX AF_IPX
207#define PF_APPLETALK AF_APPLETALK
208#define PF_NETROM AF_NETROM
209#define PF_BRIDGE AF_BRIDGE
210#define PF_ATMPVC AF_ATMPVC
211#define PF_X25 AF_X25
212#define PF_INET6 AF_INET6
213#define PF_ROSE AF_ROSE
214#define PF_DECnet AF_DECnet
215#define PF_NETBEUI AF_NETBEUI
216#define PF_SECURITY AF_SECURITY
217#define PF_KEY AF_KEY
218#define PF_NETLINK AF_NETLINK
219#define PF_ROUTE AF_ROUTE
220#define PF_PACKET AF_PACKET
221#define PF_ASH AF_ASH
222#define PF_ECONET AF_ECONET
223#define PF_ATMSVC AF_ATMSVC
8a7c4c77 224#define PF_RDS AF_RDS
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LT
225#define PF_SNA AF_SNA
226#define PF_IRDA AF_IRDA
227#define PF_PPPOX AF_PPPOX
228#define PF_WANPIPE AF_WANPIPE
229#define PF_LLC AF_LLC
cd05acfe 230#define PF_CAN AF_CAN
b97bf3fd 231#define PF_TIPC AF_TIPC
1da177e4 232#define PF_BLUETOOTH AF_BLUETOOTH
eac3731b 233#define PF_IUCV AF_IUCV
17926a79 234#define PF_RXRPC AF_RXRPC
04578dd3 235#define PF_ISDN AF_ISDN
bce7b154 236#define PF_PHONET AF_PHONET
fcb94e42 237#define PF_IEEE802154 AF_IEEE802154
70596b61 238#define PF_CAIF AF_CAIF
c2f9bff5 239#define PF_ALG AF_ALG
c7fe3b52 240#define PF_NFC AF_NFC
1da177e4
LT
241#define PF_MAX AF_MAX
242
243/* Maximum queue length specifiable by listen. */
244#define SOMAXCONN 128
245
246/* Flags we can use with send/ and recv.
247 Added those for 1003.1g not all are supported yet
248 */
249
250#define MSG_OOB 1
251#define MSG_PEEK 2
252#define MSG_DONTROUTE 4
253#define MSG_TRYHARD 4 /* Synonym for MSG_DONTROUTE for DECnet */
254#define MSG_CTRUNC 8
255#define MSG_PROBE 0x10 /* Do not send. Only probe path f.e. for MTU */
256#define MSG_TRUNC 0x20
257#define MSG_DONTWAIT 0x40 /* Nonblocking io */
258#define MSG_EOR 0x80 /* End of record */
259#define MSG_WAITALL 0x100 /* Wait for a full request */
260#define MSG_FIN 0x200
261#define MSG_SYN 0x400
262#define MSG_CONFIRM 0x800 /* Confirm path validity */
263#define MSG_RST 0x1000
264#define MSG_ERRQUEUE 0x2000 /* Fetch message from error queue */
265#define MSG_NOSIGNAL 0x4000 /* Do not generate SIGPIPE */
266#define MSG_MORE 0x8000 /* Sender will send more */
71c5c159 267#define MSG_WAITFORONE 0x10000 /* recvmmsg(): block until 1+ packets avail */
1da177e4
LT
268
269#define MSG_EOF MSG_FIN
270
4a19542e
UD
271#define MSG_CMSG_CLOEXEC 0x40000000 /* Set close_on_exit for file
272 descriptor received through
273 SCM_RIGHTS */
1da177e4
LT
274#if defined(CONFIG_COMPAT)
275#define MSG_CMSG_COMPAT 0x80000000 /* This message needs 32 bit fixups */
276#else
277#define MSG_CMSG_COMPAT 0 /* We never have 32 bit fixups */
278#endif
279
280
281/* Setsockoptions(2) level. Thanks to BSD these must match IPPROTO_xxx */
282#define SOL_IP 0
283/* #define SOL_ICMP 1 No-no-no! Due to Linux :-) we cannot use SOL_ICMP=1 */
284#define SOL_TCP 6
285#define SOL_UDP 17
286#define SOL_IPV6 41
287#define SOL_ICMPV6 58
288#define SOL_SCTP 132
ba4e58ec 289#define SOL_UDPLITE 136 /* UDP-Lite (RFC 3828) */
1da177e4
LT
290#define SOL_RAW 255
291#define SOL_IPX 256
292#define SOL_AX25 257
293#define SOL_ATALK 258
294#define SOL_NETROM 259
295#define SOL_ROSE 260
296#define SOL_DECNET 261
297#define SOL_X25 262
298#define SOL_PACKET 263
299#define SOL_ATM 264 /* ATM layer (cell level) */
300#define SOL_AAL 265 /* ATM Adaption Layer (packet level) */
301#define SOL_IRDA 266
302#define SOL_NETBEUI 267
303#define SOL_LLC 268
7c657876 304#define SOL_DCCP 269
9a4595bc 305#define SOL_NETLINK 270
b97bf3fd 306#define SOL_TIPC 271
17926a79 307#define SOL_RXRPC 272
cf14a4d0 308#define SOL_PPPOL2TP 273
2cb3377a 309#define SOL_BLUETOOTH 274
02a47617 310#define SOL_PNPIPE 275
8a7c4c77 311#define SOL_RDS 276
9d5c5d8f 312#define SOL_IUCV 277
70596b61 313#define SOL_CAIF 278
c2f9bff5 314#define SOL_ALG 279
1da177e4
LT
315
316/* IPX options */
317#define IPX_TYPE 1
318
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EB
319extern void cred_to_ucred(struct pid *pid, const struct cred *cred, struct ucred *ucred);
320
1da177e4 321extern int memcpy_fromiovec(unsigned char *kdata, struct iovec *iov, int len);
6f26c9a7
MT
322extern int memcpy_fromiovecend(unsigned char *kdata, const struct iovec *iov,
323 int offset, int len);
1da177e4
LT
324extern int csum_partial_copy_fromiovecend(unsigned char *kdata,
325 struct iovec *iov,
326 int offset,
44bb9363 327 unsigned int len, __wsum *csump);
1da177e4 328
43db362d 329extern int verify_iovec(struct msghdr *m, struct iovec *iov, struct sockaddr_storage *address, int mode);
1da177e4 330extern int memcpy_toiovec(struct iovec *v, unsigned char *kdata, int len);
0a1ec07a
MT
331extern int memcpy_toiovecend(const struct iovec *v, unsigned char *kdata,
332 int offset, int len);
43db362d 333extern int move_addr_to_kernel(void __user *uaddr, int ulen, struct sockaddr_storage *kaddr);
1da177e4
LT
334extern int put_cmsg(struct msghdr*, int level, int type, int len, void *data);
335
a2e27255
ACM
336struct timespec;
337
338extern int __sys_recvmmsg(int fd, struct mmsghdr __user *mmsg, unsigned int vlen,
339 unsigned int flags, struct timespec *timeout);
228e548e
AB
340extern int __sys_sendmmsg(int fd, struct mmsghdr __user *mmsg,
341 unsigned int vlen, unsigned int flags);
1da177e4
LT
342#endif /* not kernel and not glibc */
343#endif /* _LINUX_SOCKET_H */
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