File: /usr/src/linux/include/linux/socket.h
1 #ifndef _LINUX_SOCKET_H
2 #define _LINUX_SOCKET_H
3
4 #if defined(__KERNEL__) || !defined(__GLIBC__) || (__GLIBC__ < 2)
5
6 #include <asm/socket.h> /* arch-dependent defines */
7 #include <linux/sockios.h> /* the SIOCxxx I/O controls */
8 #include <linux/uio.h> /* iovec support */
9 #include <linux/types.h> /* pid_t */
10
11 typedef unsigned short sa_family_t;
12
13 /*
14 * 1003.1g requires sa_family_t and that sa_data is char.
15 */
16
17 struct sockaddr {
18 sa_family_t sa_family; /* address family, AF_xxx */
19 char sa_data[14]; /* 14 bytes of protocol address */
20 };
21
22 struct linger {
23 int l_onoff; /* Linger active */
24 int l_linger; /* How long to linger for */
25 };
26
27 /*
28 * As we do 4.4BSD message passing we use a 4.4BSD message passing
29 * system, not 4.3. Thus msg_accrights(len) are now missing. They
30 * belong in an obscure libc emulation or the bin.
31 */
32
33 struct msghdr {
34 void * msg_name; /* Socket name */
35 int msg_namelen; /* Length of name */
36 struct iovec * msg_iov; /* Data blocks */
37 __kernel_size_t msg_iovlen; /* Number of blocks */
38 void * msg_control; /* Per protocol magic (eg BSD file descriptor passing) */
39 __kernel_size_t msg_controllen; /* Length of cmsg list */
40 unsigned msg_flags;
41 };
42
43 /*
44 * POSIX 1003.1g - ancillary data object information
45 * Ancillary data consits of a sequence of pairs of
46 * (cmsghdr, cmsg_data[])
47 */
48
49 struct cmsghdr {
50 __kernel_size_t cmsg_len; /* data byte count, including hdr */
51 int cmsg_level; /* originating protocol */
52 int cmsg_type; /* protocol-specific type */
53 };
54
55 /*
56 * Ancilliary data object information MACROS
57 * Table 5-14 of POSIX 1003.1g
58 */
59
60 #define __CMSG_NXTHDR(ctl, len, cmsg) __cmsg_nxthdr((ctl),(len),(cmsg))
61 #define CMSG_NXTHDR(mhdr, cmsg) cmsg_nxthdr((mhdr), (cmsg))
62
63 #define CMSG_ALIGN(len) ( ((len)+sizeof(long)-1) & ~(sizeof(long)-1) )
64
65 #define CMSG_DATA(cmsg) ((void *)((char *)(cmsg) + CMSG_ALIGN(sizeof(struct cmsghdr))))
66 #define CMSG_SPACE(len) (CMSG_ALIGN(sizeof(struct cmsghdr)) + CMSG_ALIGN(len))
67 #define CMSG_LEN(len) (CMSG_ALIGN(sizeof(struct cmsghdr)) + (len))
68
69 #define __CMSG_FIRSTHDR(ctl,len) ((len) >= sizeof(struct cmsghdr) ? \
70 (struct cmsghdr *)(ctl) : \
71 (struct cmsghdr *)NULL)
72 #define CMSG_FIRSTHDR(msg) __CMSG_FIRSTHDR((msg)->msg_control, (msg)->msg_controllen)
73
74 /*
75 * This mess will go away with glibc
76 */
77
78 #ifdef __KERNEL__
79 #define __KINLINE static inline
80 #elif defined(__GNUC__)
81 #define __KINLINE static __inline__
82 #elif defined(__cplusplus)
83 #define __KINLINE static inline
84 #else
85 #define __KINLINE static
86 #endif
87
88
89 /*
90 * Get the next cmsg header
91 *
92 * PLEASE, do not touch this function. If you think, that it is
93 * incorrect, grep kernel sources and think about consequences
94 * before trying to improve it.
95 *
96 * Now it always returns valid, not truncated ancillary object
97 * HEADER. But caller still MUST check, that cmsg->cmsg_len is
98 * inside range, given by msg->msg_controllen before using
99 * ansillary object DATA. --ANK (980731)
100 */
101
102 __KINLINE struct cmsghdr * __cmsg_nxthdr(void *__ctl, __kernel_size_t __size,
103 struct cmsghdr *__cmsg)
104 {
105 struct cmsghdr * __ptr;
106
107 __ptr = (struct cmsghdr*)(((unsigned char *) __cmsg) + CMSG_ALIGN(__cmsg->cmsg_len));
108 if ((unsigned long)((char*)(__ptr+1) - (char *) __ctl) > __size)
109 return (struct cmsghdr *)0;
110
111 return __ptr;
112 }
113
114 __KINLINE struct cmsghdr * cmsg_nxthdr (struct msghdr *__msg, struct cmsghdr *__cmsg)
115 {
116 return __cmsg_nxthdr(__msg->msg_control, __msg->msg_controllen, __cmsg);
117 }
118
119 /* "Socket"-level control message types: */
120
121 #define SCM_RIGHTS 0x01 /* rw: access rights (array of int) */
122 #define SCM_CREDENTIALS 0x02 /* rw: struct ucred */
123 #define SCM_CONNECT 0x03 /* rw: struct scm_connect */
124
125 struct ucred {
126 __u32 pid;
127 __u32 uid;
128 __u32 gid;
129 };
130
131 /* Supported address families. */
132 #define AF_UNSPEC 0
133 #define AF_UNIX 1 /* Unix domain sockets */
134 #define AF_LOCAL 1 /* POSIX name for AF_UNIX */
135 #define AF_INET 2 /* Internet IP Protocol */
136 #define AF_AX25 3 /* Amateur Radio AX.25 */
137 #define AF_IPX 4 /* Novell IPX */
138 #define AF_APPLETALK 5 /* AppleTalk DDP */
139 #define AF_NETROM 6 /* Amateur Radio NET/ROM */
140 #define AF_BRIDGE 7 /* Multiprotocol bridge */
141 #define AF_ATMPVC 8 /* ATM PVCs */
142 #define AF_X25 9 /* Reserved for X.25 project */
143 #define AF_INET6 10 /* IP version 6 */
144 #define AF_ROSE 11 /* Amateur Radio X.25 PLP */
145 #define AF_DECnet 12 /* Reserved for DECnet project */
146 #define AF_NETBEUI 13 /* Reserved for 802.2LLC project*/
147 #define AF_SECURITY 14 /* Security callback pseudo AF */
148 #define AF_KEY 15 /* PF_KEY key management API */
149 #define AF_NETLINK 16
150 #define AF_ROUTE AF_NETLINK /* Alias to emulate 4.4BSD */
151 #define AF_PACKET 17 /* Packet family */
152 #define AF_ASH 18 /* Ash */
153 #define AF_ECONET 19 /* Acorn Econet */
154 #define AF_ATMSVC 20 /* ATM SVCs */
155 #define AF_SNA 22 /* Linux SNA Project (nutters!) */
156 #define AF_IRDA 23 /* IRDA sockets */
157 #define AF_PPPOX 24 /* PPPoX sockets */
158 #define AF_WANPIPE 25 /* Wanpipe API Sockets */
159 #define AF_BLUETOOTH 31 /* Bluetooth sockets */
160 #define AF_MAX 32 /* For now.. */
161
162 /* Protocol families, same as address families. */
163 #define PF_UNSPEC AF_UNSPEC
164 #define PF_UNIX AF_UNIX
165 #define PF_LOCAL AF_LOCAL
166 #define PF_INET AF_INET
167 #define PF_AX25 AF_AX25
168 #define PF_IPX AF_IPX
169 #define PF_APPLETALK AF_APPLETALK
170 #define PF_NETROM AF_NETROM
171 #define PF_BRIDGE AF_BRIDGE
172 #define PF_ATMPVC AF_ATMPVC
173 #define PF_X25 AF_X25
174 #define PF_INET6 AF_INET6
175 #define PF_ROSE AF_ROSE
176 #define PF_DECnet AF_DECnet
177 #define PF_NETBEUI AF_NETBEUI
178 #define PF_SECURITY AF_SECURITY
179 #define PF_KEY AF_KEY
180 #define PF_NETLINK AF_NETLINK
181 #define PF_ROUTE AF_ROUTE
182 #define PF_PACKET AF_PACKET
183 #define PF_ASH AF_ASH
184 #define PF_ECONET AF_ECONET
185 #define PF_ATMSVC AF_ATMSVC
186 #define PF_SNA AF_SNA
187 #define PF_IRDA AF_IRDA
188 #define PF_PPPOX AF_PPPOX
189 #define PF_WANPIPE AF_WANPIPE
190 #define PF_BLUETOOTH AF_BLUETOOTH
191 #define PF_MAX AF_MAX
192
193 /* Maximum queue length specifiable by listen. */
194 #define SOMAXCONN 128
195
196 /* Flags we can use with send/ and recv.
197 Added those for 1003.1g not all are supported yet
198 */
199
200 #define MSG_OOB 1
201 #define MSG_PEEK 2
202 #define MSG_DONTROUTE 4
203 #define MSG_TRYHARD 4 /* Synonym for MSG_DONTROUTE for DECnet */
204 #define MSG_CTRUNC 8
205 #define MSG_PROBE 0x10 /* Do not send. Only probe path f.e. for MTU */
206 #define MSG_TRUNC 0x20
207 #define MSG_DONTWAIT 0x40 /* Nonblocking io */
208 #define MSG_EOR 0x80 /* End of record */
209 #define MSG_WAITALL 0x100 /* Wait for a full request */
210 #define MSG_FIN 0x200
211 #define MSG_SYN 0x400
212 #define MSG_CONFIRM 0x800 /* Confirm path validity */
213 #define MSG_RST 0x1000
214 #define MSG_ERRQUEUE 0x2000 /* Fetch message from error queue */
215 #define MSG_NOSIGNAL 0x4000 /* Do not generate SIGPIPE */
216 #define MSG_MORE 0x8000 /* Sender will send more */
217
218 #define MSG_EOF MSG_FIN
219
220
221 /* Setsockoptions(2) level. Thanks to BSD these must match IPPROTO_xxx */
222 #define SOL_IP 0
223 /* #define SOL_ICMP 1 No-no-no! Due to Linux :-) we cannot use SOL_ICMP=1 */
224 #define SOL_TCP 6
225 #define SOL_UDP 17
226 #define SOL_IPV6 41
227 #define SOL_ICMPV6 58
228 #define SOL_RAW 255
229 #define SOL_IPX 256
230 #define SOL_AX25 257
231 #define SOL_ATALK 258
232 #define SOL_NETROM 259
233 #define SOL_ROSE 260
234 #define SOL_DECNET 261
235 #define SOL_X25 262
236 #define SOL_PACKET 263
237 #define SOL_ATM 264 /* ATM layer (cell level) */
238 #define SOL_AAL 265 /* ATM Adaption Layer (packet level) */
239 #define SOL_IRDA 266
240
241 /* IPX options */
242 #define IPX_TYPE 1
243
244 #ifdef __KERNEL__
245 extern int memcpy_fromiovec(unsigned char *kdata, struct iovec *iov, int len);
246 extern int memcpy_fromiovecend(unsigned char *kdata, struct iovec *iov,
247 int offset, int len);
248 extern int csum_partial_copy_fromiovecend(unsigned char *kdata,
249 struct iovec *iov,
250 int offset,
251 unsigned int len, int *csump);
252
253 extern int verify_iovec(struct msghdr *m, struct iovec *iov, char *address, int mode);
254 extern int memcpy_toiovec(struct iovec *v, unsigned char *kdata, int len);
255 extern void memcpy_tokerneliovec(struct iovec *iov, unsigned char *kdata, int len);
256 extern int move_addr_to_user(void *kaddr, int klen, void *uaddr, int *ulen);
257 extern int move_addr_to_kernel(void *uaddr, int ulen, void *kaddr);
258 extern int put_cmsg(struct msghdr*, int level, int type, int len, void *data);
259 #endif
260 #endif /* not kernel and not glibc */
261 #endif /* _LINUX_SOCKET_H */
262