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 
11 struct __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 
26 typedef unsigned short	sa_family_t;
27 
28 /*
29  *	1003.1g requires sa_family_t and that sa_data is char.
30  */
31 
32 struct sockaddr {
33 	sa_family_t	sa_family;	/* address family, AF_xxx	*/
34 	char		sa_data[14];	/* 14 bytes of protocol address	*/
35 };
36 
37 struct linger {
38 	int		l_onoff;	/* Linger active		*/
39 	int		l_linger;	/* How long to linger for	*/
40 };
41 
42 #define sockaddr_storage __kernel_sockaddr_storage
43 
44 /*
45  *	As we do 4.4BSD message passing we use a 4.4BSD message passing
46  *	system, not 4.3. Thus msg_accrights(len) are now missing. They
47  *	belong in an obscure libc emulation or the bin.
48  */
49 
50 struct msghdr {
51 	void	*	msg_name;	/* Socket name			*/
52 	int		msg_namelen;	/* Length of name		*/
53 	struct iovec *	msg_iov;	/* Data blocks			*/
54 	__kernel_size_t	msg_iovlen;	/* Number of blocks		*/
55 	void 	*	msg_control;	/* Per protocol magic (eg BSD file descriptor passing) */
56 	__kernel_size_t	msg_controllen;	/* Length of cmsg list */
57 	unsigned	msg_flags;
58 };
59 
60 /*
61  *	POSIX 1003.1g - ancillary data object information
62  *	Ancillary data consits of a sequence of pairs of
63  *	(cmsghdr, cmsg_data[])
64  */
65 
66 struct cmsghdr {
67 	__kernel_size_t	cmsg_len;	/* data byte count, including hdr */
68         int		cmsg_level;	/* originating protocol */
69         int		cmsg_type;	/* protocol-specific type */
70 };
71 
72 /*
73  *	Ancilliary data object information MACROS
74  *	Table 5-14 of POSIX 1003.1g
75  */
76 
77 #define __CMSG_NXTHDR(ctl, len, cmsg) __cmsg_nxthdr((ctl),(len),(cmsg))
78 #define CMSG_NXTHDR(mhdr, cmsg) cmsg_nxthdr((mhdr), (cmsg))
79 
80 #define CMSG_ALIGN(len) ( ((len)+sizeof(long)-1) & ~(sizeof(long)-1) )
81 
82 #define CMSG_DATA(cmsg)	((void *)((char *)(cmsg) + CMSG_ALIGN(sizeof(struct cmsghdr))))
83 #define CMSG_SPACE(len) (CMSG_ALIGN(sizeof(struct cmsghdr)) + CMSG_ALIGN(len))
84 #define CMSG_LEN(len) (CMSG_ALIGN(sizeof(struct cmsghdr)) + (len))
85 
86 #define __CMSG_FIRSTHDR(ctl,len) ((len) >= sizeof(struct cmsghdr) ? \
87 				  (struct cmsghdr *)(ctl) : \
88 				  (struct cmsghdr *)NULL)
89 #define CMSG_FIRSTHDR(msg)	__CMSG_FIRSTHDR((msg)->msg_control, (msg)->msg_controllen)
90 #define CMSG_OK(mhdr, cmsg) ((cmsg)->cmsg_len >= sizeof(struct cmsghdr) && \
91 			     (cmsg)->cmsg_len <= (unsigned long) \
92 			     ((mhdr)->msg_controllen - \
93 			      ((char *)(cmsg) - (char *)(mhdr)->msg_control)))
94 
95 /*
96  *	This mess will go away with glibc
97  */
98 
99 #ifdef __KERNEL__
100 #define __KINLINE static inline
101 #elif  defined(__GNUC__)
102 #define __KINLINE static __inline__
103 #elif defined(__cplusplus)
104 #define __KINLINE static inline
105 #else
106 #define __KINLINE static
107 #endif
108 
109 
110 /*
111  *	Get the next cmsg header
112  *
113  *	PLEASE, do not touch this function. If you think, that it is
114  *	incorrect, grep kernel sources and think about consequences
115  *	before trying to improve it.
116  *
117  *	Now it always returns valid, not truncated ancillary object
118  *	HEADER. But caller still MUST check, that cmsg->cmsg_len is
119  *	inside range, given by msg->msg_controllen before using
120  *	ansillary object DATA.				--ANK (980731)
121  */
122 
__cmsg_nxthdr(void * __ctl,__kernel_size_t __size,struct cmsghdr * __cmsg)123 __KINLINE struct cmsghdr * __cmsg_nxthdr(void *__ctl, __kernel_size_t __size,
124 					       struct cmsghdr *__cmsg)
125 {
126 	struct cmsghdr * __ptr;
127 
128 	__ptr = (struct cmsghdr*)(((unsigned char *) __cmsg) +  CMSG_ALIGN(__cmsg->cmsg_len));
129 	if ((unsigned long)((char*)(__ptr+1) - (char *) __ctl) > __size)
130 		return (struct cmsghdr *)0;
131 
132 	return __ptr;
133 }
134 
cmsg_nxthdr(struct msghdr * __msg,struct cmsghdr * __cmsg)135 __KINLINE struct cmsghdr * cmsg_nxthdr (struct msghdr *__msg, struct cmsghdr *__cmsg)
136 {
137 	return __cmsg_nxthdr(__msg->msg_control, __msg->msg_controllen, __cmsg);
138 }
139 
140 /* "Socket"-level control message types: */
141 
142 #define	SCM_RIGHTS	0x01		/* rw: access rights (array of int) */
143 #define SCM_CREDENTIALS 0x02		/* rw: struct ucred		*/
144 
145 struct ucred {
146 	__u32	pid;
147 	__u32	uid;
148 	__u32	gid;
149 };
150 
151 /* Supported address families. */
152 #define AF_UNSPEC	0
153 #define AF_UNIX		1	/* Unix domain sockets 		*/
154 #define AF_LOCAL	1	/* POSIX name for AF_UNIX	*/
155 #define AF_INET		2	/* Internet IP Protocol 	*/
156 #define AF_AX25		3	/* Amateur Radio AX.25 		*/
157 #define AF_IPX		4	/* Novell IPX 			*/
158 #define AF_APPLETALK	5	/* AppleTalk DDP 		*/
159 #define AF_NETROM	6	/* Amateur Radio NET/ROM 	*/
160 #define AF_BRIDGE	7	/* Multiprotocol bridge 	*/
161 #define AF_ATMPVC	8	/* ATM PVCs			*/
162 #define AF_X25		9	/* Reserved for X.25 project 	*/
163 #define AF_INET6	10	/* IP version 6			*/
164 #define AF_ROSE		11	/* Amateur Radio X.25 PLP	*/
165 #define AF_DECnet	12	/* Reserved for DECnet project	*/
166 #define AF_NETBEUI	13	/* Reserved for 802.2LLC project*/
167 #define AF_SECURITY	14	/* Security callback pseudo AF */
168 #define AF_KEY		15      /* PF_KEY key management API */
169 #define AF_NETLINK	16
170 #define AF_ROUTE	AF_NETLINK /* Alias to emulate 4.4BSD */
171 #define AF_PACKET	17	/* Packet family		*/
172 #define AF_ASH		18	/* Ash				*/
173 #define AF_ECONET	19	/* Acorn Econet			*/
174 #define AF_ATMSVC	20	/* ATM SVCs			*/
175 #define AF_SNA		22	/* Linux SNA Project (nutters!) */
176 #define AF_IRDA		23	/* IRDA sockets			*/
177 #define AF_PPPOX	24	/* PPPoX sockets		*/
178 #define AF_WANPIPE	25	/* Wanpipe API Sockets */
179 #define AF_LLC		26	/* Linux LLC			*/
180 #define AF_BLUETOOTH	31	/* Bluetooth sockets 		*/
181 #define AF_MAX		32	/* For now.. */
182 
183 /* Protocol families, same as address families. */
184 #define PF_UNSPEC	AF_UNSPEC
185 #define PF_UNIX		AF_UNIX
186 #define PF_LOCAL	AF_LOCAL
187 #define PF_INET		AF_INET
188 #define PF_AX25		AF_AX25
189 #define PF_IPX		AF_IPX
190 #define PF_APPLETALK	AF_APPLETALK
191 #define	PF_NETROM	AF_NETROM
192 #define PF_BRIDGE	AF_BRIDGE
193 #define PF_ATMPVC	AF_ATMPVC
194 #define PF_X25		AF_X25
195 #define PF_INET6	AF_INET6
196 #define PF_ROSE		AF_ROSE
197 #define PF_DECnet	AF_DECnet
198 #define PF_NETBEUI	AF_NETBEUI
199 #define PF_SECURITY	AF_SECURITY
200 #define PF_KEY		AF_KEY
201 #define PF_NETLINK	AF_NETLINK
202 #define PF_ROUTE	AF_ROUTE
203 #define PF_PACKET	AF_PACKET
204 #define PF_ASH		AF_ASH
205 #define PF_ECONET	AF_ECONET
206 #define PF_ATMSVC	AF_ATMSVC
207 #define PF_SNA		AF_SNA
208 #define PF_IRDA		AF_IRDA
209 #define PF_PPPOX	AF_PPPOX
210 #define PF_WANPIPE	AF_WANPIPE
211 #define PF_LLC		AF_LLC
212 #define PF_BLUETOOTH	AF_BLUETOOTH
213 #define PF_MAX		AF_MAX
214 
215 /* Maximum queue length specifiable by listen.  */
216 #define SOMAXCONN	128
217 
218 /* Flags we can use with send/ and recv.
219    Added those for 1003.1g not all are supported yet
220  */
221 
222 #define MSG_OOB		1
223 #define MSG_PEEK	2
224 #define MSG_DONTROUTE	4
225 #define MSG_TRYHARD     4       /* Synonym for MSG_DONTROUTE for DECnet */
226 #define MSG_CTRUNC	8
227 #define MSG_PROBE	0x10	/* Do not send. Only probe path f.e. for MTU */
228 #define MSG_TRUNC	0x20
229 #define MSG_DONTWAIT	0x40	/* Nonblocking io		 */
230 #define MSG_EOR         0x80	/* End of record */
231 #define MSG_WAITALL	0x100	/* Wait for a full request */
232 #define MSG_FIN         0x200
233 #define MSG_SYN		0x400
234 #define MSG_CONFIRM	0x800	/* Confirm path validity */
235 #define MSG_RST		0x1000
236 #define MSG_ERRQUEUE	0x2000	/* Fetch message from error queue */
237 #define MSG_NOSIGNAL	0x4000	/* Do not generate SIGPIPE */
238 #define MSG_MORE	0x8000	/* Sender will send more */
239 
240 #define MSG_EOF         MSG_FIN
241 
242 
243 /* Setsockoptions(2) level. Thanks to BSD these must match IPPROTO_xxx */
244 #define SOL_IP		0
245 /* #define SOL_ICMP	1	No-no-no! Due to Linux :-) we cannot use SOL_ICMP=1 */
246 #define SOL_TCP		6
247 #define SOL_UDP		17
248 #define SOL_IPV6	41
249 #define SOL_ICMPV6	58
250 #define SOL_SCTP	132
251 #define SOL_RAW		255
252 #define SOL_IPX		256
253 #define SOL_AX25	257
254 #define SOL_ATALK	258
255 #define SOL_NETROM	259
256 #define SOL_ROSE	260
257 #define SOL_DECNET	261
258 #define	SOL_X25		262
259 #define SOL_PACKET	263
260 #define SOL_ATM		264	/* ATM layer (cell level) */
261 #define SOL_AAL		265	/* ATM Adaption Layer (packet level) */
262 #define SOL_IRDA        266
263 #define SOL_NETBEUI	267
264 #define SOL_LLC		268
265 
266 /* IPX options */
267 #define IPX_TYPE	1
268 
269 #ifdef __KERNEL__
270 extern int memcpy_fromiovec(unsigned char *kdata, struct iovec *iov, int len);
271 extern int memcpy_fromiovecend(unsigned char *kdata, struct iovec *iov,
272 				int offset, int len);
273 extern int csum_partial_copy_fromiovecend(unsigned char *kdata,
274 					  struct iovec *iov,
275 					  int offset,
276 					  unsigned int len, int *csump);
277 
278 extern int verify_iovec(struct msghdr *m, struct iovec *iov, char *address, int mode);
279 extern int memcpy_toiovec(struct iovec *v, unsigned char *kdata, int len);
280 extern void memcpy_tokerneliovec(struct iovec *iov, unsigned char *kdata, int len);
281 extern int move_addr_to_user(void *kaddr, int klen, void *uaddr, int *ulen);
282 extern int move_addr_to_kernel(void *uaddr, int ulen, void *kaddr);
283 extern int put_cmsg(struct msghdr*, int level, int type, int len, void *data);
284 #endif
285 #endif /* not kernel and not glibc */
286 #endif /* _LINUX_SOCKET_H */
287