include/linux/socket.h

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