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Linux/include/linux/socket.h

  1 #ifndef _LINUX_SOCKET_H
  2 #define _LINUX_SOCKET_H
  3 
  4 
  5 #include <asm/socket.h>                 /* arch-dependent defines       */
  6 #include <linux/sockios.h>              /* the SIOCxxx I/O controls     */
  7 #include <linux/uio.h>                  /* iovec support                */
  8 #include <linux/types.h>                /* pid_t                        */
  9 #include <linux/compiler.h>             /* __user                       */
 10 #include <uapi/linux/socket.h>
 11 
 12 struct pid;
 13 struct cred;
 14 
 15 #define __sockaddr_check_size(size)     \
 16         BUILD_BUG_ON(((size) > sizeof(struct __kernel_sockaddr_storage)))
 17 
 18 #ifdef CONFIG_PROC_FS
 19 struct seq_file;
 20 extern void socket_seq_show(struct seq_file *seq);
 21 #endif
 22 
 23 typedef __kernel_sa_family_t    sa_family_t;
 24 
 25 /*
 26  *      1003.1g requires sa_family_t and that sa_data is char.
 27  */
 28  
 29 struct sockaddr {
 30         sa_family_t     sa_family;      /* address family, AF_xxx       */
 31         char            sa_data[14];    /* 14 bytes of protocol address */
 32 };
 33 
 34 struct linger {
 35         int             l_onoff;        /* Linger active                */
 36         int             l_linger;       /* How long to linger for       */
 37 };
 38 
 39 #define sockaddr_storage __kernel_sockaddr_storage
 40 
 41 /*
 42  *      As we do 4.4BSD message passing we use a 4.4BSD message passing
 43  *      system, not 4.3. Thus msg_accrights(len) are now missing. They
 44  *      belong in an obscure libc emulation or the bin.
 45  */
 46  
 47 struct msghdr {
 48         void            *msg_name;      /* ptr to socket address structure */
 49         int             msg_namelen;    /* size of socket address structure */
 50         struct iovec    *msg_iov;       /* scatter/gather array */
 51         __kernel_size_t msg_iovlen;     /* # elements in msg_iov */
 52         void            *msg_control;   /* ancillary data */
 53         __kernel_size_t msg_controllen; /* ancillary data buffer length */
 54         unsigned int    msg_flags;      /* flags on received message */
 55 };
 56 
 57 /* For recvmmsg/sendmmsg */
 58 struct mmsghdr {
 59         struct msghdr   msg_hdr;
 60         unsigned int        msg_len;
 61 };
 62 
 63 /*
 64  *      POSIX 1003.1g - ancillary data object information
 65  *      Ancillary data consits of a sequence of pairs of
 66  *      (cmsghdr, cmsg_data[])
 67  */
 68 
 69 struct cmsghdr {
 70         __kernel_size_t cmsg_len;       /* data byte count, including hdr */
 71         int             cmsg_level;     /* originating protocol */
 72         int             cmsg_type;      /* protocol-specific type */
 73 };
 74 
 75 /*
 76  *      Ancillary data object information MACROS
 77  *      Table 5-14 of POSIX 1003.1g
 78  */
 79 
 80 #define __CMSG_NXTHDR(ctl, len, cmsg) __cmsg_nxthdr((ctl),(len),(cmsg))
 81 #define CMSG_NXTHDR(mhdr, cmsg) cmsg_nxthdr((mhdr), (cmsg))
 82 
 83 #define CMSG_ALIGN(len) ( ((len)+sizeof(long)-1) & ~(sizeof(long)-1) )
 84 
 85 #define CMSG_DATA(cmsg) ((void *)((char *)(cmsg) + CMSG_ALIGN(sizeof(struct cmsghdr))))
 86 #define CMSG_SPACE(len) (CMSG_ALIGN(sizeof(struct cmsghdr)) + CMSG_ALIGN(len))
 87 #define CMSG_LEN(len) (CMSG_ALIGN(sizeof(struct cmsghdr)) + (len))
 88 
 89 #define __CMSG_FIRSTHDR(ctl,len) ((len) >= sizeof(struct cmsghdr) ? \
 90                                   (struct cmsghdr *)(ctl) : \
 91                                   (struct cmsghdr *)NULL)
 92 #define CMSG_FIRSTHDR(msg)      __CMSG_FIRSTHDR((msg)->msg_control, (msg)->msg_controllen)
 93 #define CMSG_OK(mhdr, cmsg) ((cmsg)->cmsg_len >= sizeof(struct cmsghdr) && \
 94                              (cmsg)->cmsg_len <= (unsigned long) \
 95                              ((mhdr)->msg_controllen - \
 96                               ((char *)(cmsg) - (char *)(mhdr)->msg_control)))
 97 
 98 /*
 99  *      Get the next cmsg header
100  *
101  *      PLEASE, do not touch this function. If you think, that it is
102  *      incorrect, grep kernel sources and think about consequences
103  *      before trying to improve it.
104  *
105  *      Now it always returns valid, not truncated ancillary object
106  *      HEADER. But caller still MUST check, that cmsg->cmsg_len is
107  *      inside range, given by msg->msg_controllen before using
108  *      ancillary object DATA.                          --ANK (980731)
109  */
110  
111 static inline struct cmsghdr * __cmsg_nxthdr(void *__ctl, __kernel_size_t __size,
112                                                struct cmsghdr *__cmsg)
113 {
114         struct cmsghdr * __ptr;
115 
116         __ptr = (struct cmsghdr*)(((unsigned char *) __cmsg) +  CMSG_ALIGN(__cmsg->cmsg_len));
117         if ((unsigned long)((char*)(__ptr+1) - (char *) __ctl) > __size)
118                 return (struct cmsghdr *)0;
119 
120         return __ptr;
121 }
122 
123 static inline struct cmsghdr * cmsg_nxthdr (struct msghdr *__msg, struct cmsghdr *__cmsg)
124 {
125         return __cmsg_nxthdr(__msg->msg_control, __msg->msg_controllen, __cmsg);
126 }
127 
128 /* "Socket"-level control message types: */
129 
130 #define SCM_RIGHTS      0x01            /* rw: access rights (array of int) */
131 #define SCM_CREDENTIALS 0x02            /* rw: struct ucred             */
132 #define SCM_SECURITY    0x03            /* rw: security label           */
133 
134 struct ucred {
135         __u32   pid;
136         __u32   uid;
137         __u32   gid;
138 };
139 
140 /* Supported address families. */
141 #define AF_UNSPEC       0
142 #define AF_UNIX         1       /* Unix domain sockets          */
143 #define AF_LOCAL        1       /* POSIX name for AF_UNIX       */
144 #define AF_INET         2       /* Internet IP Protocol         */
145 #define AF_AX25         3       /* Amateur Radio AX.25          */
146 #define AF_IPX          4       /* Novell IPX                   */
147 #define AF_APPLETALK    5       /* AppleTalk DDP                */
148 #define AF_NETROM       6       /* Amateur Radio NET/ROM        */
149 #define AF_BRIDGE       7       /* Multiprotocol bridge         */
150 #define AF_ATMPVC       8       /* ATM PVCs                     */
151 #define AF_X25          9       /* Reserved for X.25 project    */
152 #define AF_INET6        10      /* IP version 6                 */
153 #define AF_ROSE         11      /* Amateur Radio X.25 PLP       */
154 #define AF_DECnet       12      /* Reserved for DECnet project  */
155 #define AF_NETBEUI      13      /* Reserved for 802.2LLC project*/
156 #define AF_SECURITY     14      /* Security callback pseudo AF */
157 #define AF_KEY          15      /* PF_KEY key management API */
158 #define AF_NETLINK      16
159 #define AF_ROUTE        AF_NETLINK /* Alias to emulate 4.4BSD */
160 #define AF_PACKET       17      /* Packet family                */
161 #define AF_ASH          18      /* Ash                          */
162 #define AF_ECONET       19      /* Acorn Econet                 */
163 #define AF_ATMSVC       20      /* ATM SVCs                     */
164 #define AF_RDS          21      /* RDS sockets                  */
165 #define AF_SNA          22      /* Linux SNA Project (nutters!) */
166 #define AF_IRDA         23      /* IRDA sockets                 */
167 #define AF_PPPOX        24      /* PPPoX sockets                */
168 #define AF_WANPIPE      25      /* Wanpipe API Sockets */
169 #define AF_LLC          26      /* Linux LLC                    */
170 #define AF_IB           27      /* Native InfiniBand address    */
171 #define AF_CAN          29      /* Controller Area Network      */
172 #define AF_TIPC         30      /* TIPC sockets                 */
173 #define AF_BLUETOOTH    31      /* Bluetooth sockets            */
174 #define AF_IUCV         32      /* IUCV sockets                 */
175 #define AF_RXRPC        33      /* RxRPC sockets                */
176 #define AF_ISDN         34      /* mISDN sockets                */
177 #define AF_PHONET       35      /* Phonet sockets               */
178 #define AF_IEEE802154   36      /* IEEE802154 sockets           */
179 #define AF_CAIF         37      /* CAIF sockets                 */
180 #define AF_ALG          38      /* Algorithm sockets            */
181 #define AF_NFC          39      /* NFC sockets                  */
182 #define AF_VSOCK        40      /* vSockets                     */
183 #define AF_MAX          41      /* For now.. */
184 
185 /* Protocol families, same as address families. */
186 #define PF_UNSPEC       AF_UNSPEC
187 #define PF_UNIX         AF_UNIX
188 #define PF_LOCAL        AF_LOCAL
189 #define PF_INET         AF_INET
190 #define PF_AX25         AF_AX25
191 #define PF_IPX          AF_IPX
192 #define PF_APPLETALK    AF_APPLETALK
193 #define PF_NETROM       AF_NETROM
194 #define PF_BRIDGE       AF_BRIDGE
195 #define PF_ATMPVC       AF_ATMPVC
196 #define PF_X25          AF_X25
197 #define PF_INET6        AF_INET6
198 #define PF_ROSE         AF_ROSE
199 #define PF_DECnet       AF_DECnet
200 #define PF_NETBEUI      AF_NETBEUI
201 #define PF_SECURITY     AF_SECURITY
202 #define PF_KEY          AF_KEY
203 #define PF_NETLINK      AF_NETLINK
204 #define PF_ROUTE        AF_ROUTE
205 #define PF_PACKET       AF_PACKET
206 #define PF_ASH          AF_ASH
207 #define PF_ECONET       AF_ECONET
208 #define PF_ATMSVC       AF_ATMSVC
209 #define PF_RDS          AF_RDS
210 #define PF_SNA          AF_SNA
211 #define PF_IRDA         AF_IRDA
212 #define PF_PPPOX        AF_PPPOX
213 #define PF_WANPIPE      AF_WANPIPE
214 #define PF_LLC          AF_LLC
215 #define PF_IB           AF_IB
216 #define PF_CAN          AF_CAN
217 #define PF_TIPC         AF_TIPC
218 #define PF_BLUETOOTH    AF_BLUETOOTH
219 #define PF_IUCV         AF_IUCV
220 #define PF_RXRPC        AF_RXRPC
221 #define PF_ISDN         AF_ISDN
222 #define PF_PHONET       AF_PHONET
223 #define PF_IEEE802154   AF_IEEE802154
224 #define PF_CAIF         AF_CAIF
225 #define PF_ALG          AF_ALG
226 #define PF_NFC          AF_NFC
227 #define PF_VSOCK        AF_VSOCK
228 #define PF_MAX          AF_MAX
229 
230 /* Maximum queue length specifiable by listen.  */
231 #define SOMAXCONN       128
232 
233 /* Flags we can use with send/ and recv. 
234    Added those for 1003.1g not all are supported yet
235  */
236  
237 #define MSG_OOB         1
238 #define MSG_PEEK        2
239 #define MSG_DONTROUTE   4
240 #define MSG_TRYHARD     4       /* Synonym for MSG_DONTROUTE for DECnet */
241 #define MSG_CTRUNC      8
242 #define MSG_PROBE       0x10    /* Do not send. Only probe path f.e. for MTU */
243 #define MSG_TRUNC       0x20
244 #define MSG_DONTWAIT    0x40    /* Nonblocking io                */
245 #define MSG_EOR         0x80    /* End of record */
246 #define MSG_WAITALL     0x100   /* Wait for a full request */
247 #define MSG_FIN         0x200
248 #define MSG_SYN         0x400
249 #define MSG_CONFIRM     0x800   /* Confirm path validity */
250 #define MSG_RST         0x1000
251 #define MSG_ERRQUEUE    0x2000  /* Fetch message from error queue */
252 #define MSG_NOSIGNAL    0x4000  /* Do not generate SIGPIPE */
253 #define MSG_MORE        0x8000  /* Sender will send more */
254 #define MSG_WAITFORONE  0x10000 /* recvmmsg(): block until 1+ packets avail */
255 #define MSG_SENDPAGE_NOTLAST 0x20000 /* sendpage() internal : not the last page */
256 #define MSG_EOF         MSG_FIN
257 
258 #define MSG_FASTOPEN    0x20000000      /* Send data in TCP SYN */
259 #define MSG_CMSG_CLOEXEC 0x40000000     /* Set close_on_exit for file
260                                            descriptor received through
261                                            SCM_RIGHTS */
262 #if defined(CONFIG_COMPAT)
263 #define MSG_CMSG_COMPAT 0x80000000      /* This message needs 32 bit fixups */
264 #else
265 #define MSG_CMSG_COMPAT 0               /* We never have 32 bit fixups */
266 #endif
267 
268 
269 /* Setsockoptions(2) level. Thanks to BSD these must match IPPROTO_xxx */
270 #define SOL_IP          0
271 /* #define SOL_ICMP     1       No-no-no! Due to Linux :-) we cannot use SOL_ICMP=1 */
272 #define SOL_TCP         6
273 #define SOL_UDP         17
274 #define SOL_IPV6        41
275 #define SOL_ICMPV6      58
276 #define SOL_SCTP        132
277 #define SOL_UDPLITE     136     /* UDP-Lite (RFC 3828) */
278 #define SOL_RAW         255
279 #define SOL_IPX         256
280 #define SOL_AX25        257
281 #define SOL_ATALK       258
282 #define SOL_NETROM      259
283 #define SOL_ROSE        260
284 #define SOL_DECNET      261
285 #define SOL_X25         262
286 #define SOL_PACKET      263
287 #define SOL_ATM         264     /* ATM layer (cell level) */
288 #define SOL_AAL         265     /* ATM Adaption Layer (packet level) */
289 #define SOL_IRDA        266
290 #define SOL_NETBEUI     267
291 #define SOL_LLC         268
292 #define SOL_DCCP        269
293 #define SOL_NETLINK     270
294 #define SOL_TIPC        271
295 #define SOL_RXRPC       272
296 #define SOL_PPPOL2TP    273
297 #define SOL_BLUETOOTH   274
298 #define SOL_PNPIPE      275
299 #define SOL_RDS         276
300 #define SOL_IUCV        277
301 #define SOL_CAIF        278
302 #define SOL_ALG         279
303 #define SOL_NFC         280
304 
305 /* IPX options */
306 #define IPX_TYPE        1
307 
308 extern int memcpy_fromiovecend(unsigned char *kdata, const struct iovec *iov,
309                                int offset, int len);
310 extern int csum_partial_copy_fromiovecend(unsigned char *kdata, 
311                                           struct iovec *iov, 
312                                           int offset, 
313                                           unsigned int len, __wsum *csump);
314 extern unsigned long iov_pages(const struct iovec *iov, int offset,
315                                unsigned long nr_segs);
316 
317 extern int verify_iovec(struct msghdr *m, struct iovec *iov, struct sockaddr_storage *address, int mode);
318 extern int memcpy_toiovecend(const struct iovec *v, unsigned char *kdata,
319                              int offset, int len);
320 extern int move_addr_to_kernel(void __user *uaddr, int ulen, struct sockaddr_storage *kaddr);
321 extern int put_cmsg(struct msghdr*, int level, int type, int len, void *data);
322 
323 struct timespec;
324 
325 /* The __sys_...msg variants allow MSG_CMSG_COMPAT */
326 extern long __sys_recvmsg(int fd, struct msghdr __user *msg, unsigned flags);
327 extern long __sys_sendmsg(int fd, struct msghdr __user *msg, unsigned flags);
328 extern int __sys_recvmmsg(int fd, struct mmsghdr __user *mmsg, unsigned int vlen,
329                           unsigned int flags, struct timespec *timeout);
330 extern int __sys_sendmmsg(int fd, struct mmsghdr __user *mmsg,
331                           unsigned int vlen, unsigned int flags);
332 #endif /* _LINUX_SOCKET_H */
333 

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