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