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 <linux/config.h>               /* for CONFIG_COMPAT */
   7 #include <linux/linkage.h>
   8 #include <asm/socket.h>                 /* arch-dependent defines       */
   9 #include <linux/sockios.h>              /* the SIOCxxx I/O controls     */
  10 #include <linux/uio.h>                  /* iovec support                */
  11 #include <linux/types.h>                /* pid_t                        */
  12 #include <linux/compiler.h>             /* __user                       */
  13
  14 typedef unsigned short  sa_family_t;
  15
  16 /*
  17  *      1003.1g requires sa_family_t and that sa_data is char.
  18  */
  19
  20 struct sockaddr {
  21         sa_family_t     sa_family;      /* address family, AF_xxx       */
  22         char            sa_data[14];    /* 14 bytes of protocol address */
  23 };
  24
  25 struct linger {
  26         int             l_onoff;        /* Linger active                */
  27         int             l_linger;       /* How long to linger for       */
  28 };
  29
  30 /*
  31  * Desired design of maximum size and alignment (see RFC2553)
  32  */
  33 #define _SS_MAXSIZE     128     /* Implementation specific max size */
  34 #define _SS_ALIGNSIZE   (__alignof__ (struct sockaddr *))
  35                                 /* Implementation specific desired alignment */
  36
  37 struct sockaddr_storage {
  38         sa_family_t     ss_family;              /* address family */
  39         /* Following field(s) are implementation specific */
  40         char            __data[_SS_MAXSIZE - sizeof(sa_family_t)];
  41                                 /* space to achieve desired size, */
  42                                 /* _SS_MAXSIZE value minus size of ss_family */
  43 } __attribute__ ((aligned(_SS_ALIGNSIZE)));     /* force desired alignment */
  44
  45 /*
  46  *      As we do 4.4BSD message passing we use a 4.4BSD message passing
  47  *      system, not 4.3. Thus msg_accrights(len) are now missing. They
  48  *      belong in an obscure libc emulation or the bin.
  49  */
  50
  51 struct msghdr {
  52         void    *       msg_name;       /* Socket name                  */
  53         int             msg_namelen;    /* Length of name               */
  54         struct iovec *  msg_iov;        /* Data blocks                  */
  55         __kernel_size_t msg_iovlen;     /* Number of blocks             */
  56         void    *       msg_control;    /* Per protocol magic (eg BSD file descriptor passing) */
  57         __kernel_size_t msg_controllen; /* Length of cmsg list */
  58         unsigned        msg_flags;
  59 };
  60
  61 /*
  62  *      POSIX 1003.1g - ancillary data object information
  63  *      Ancillary data consits of a sequence of pairs of
  64  *      (cmsghdr, cmsg_data[])
  65  */
  66
  67 struct cmsghdr {
  68         __kernel_size_t cmsg_len;       /* data byte count, including hdr */
  69         int             cmsg_level;     /* originating protocol */
  70         int             cmsg_type;      /* protocol-specific type */
  71 };
  72
  73 /*
  74  *      Ancilliary data object information MACROS
  75  *      Table 5-14 of POSIX 1003.1g
  76  */
  77
  78 #define __CMSG_NXTHDR(ctl, len, cmsg) __cmsg_nxthdr((ctl),(len),(cmsg))
  79 #define CMSG_NXTHDR(mhdr, cmsg) cmsg_nxthdr((mhdr), (cmsg))
  80
  81 #define CMSG_ALIGN(len) ( ((len)+sizeof(long)-1) & ~(sizeof(long)-1) )
  82
  83 #define CMSG_DATA(cmsg) ((void *)((char *)(cmsg) + CMSG_ALIGN(sizeof(struct cmsghdr))))
  84 #define CMSG_SPACE(len) (CMSG_ALIGN(sizeof(struct cmsghdr)) + CMSG_ALIGN(len))
  85 #define CMSG_LEN(len) (CMSG_ALIGN(sizeof(struct cmsghdr)) + (len))
  86
  87 #define __CMSG_FIRSTHDR(ctl,len) ((len) >= sizeof(struct cmsghdr) ? \
  88                                   (struct cmsghdr *)(ctl) : \
  89                                   (struct cmsghdr *)NULL)
  90 #define CMSG_FIRSTHDR(msg)      __CMSG_FIRSTHDR((msg)->msg_control, (msg)->msg_controllen)
  91
  92 /*
  93  *      This mess will go away with glibc
  94  */
  95
  96 #ifdef __KERNEL__
  97 #define __KINLINE static inline
  98 #elif  defined(__GNUC__)
  99 #define __KINLINE static __inline__
 100 #elif defined(__cplusplus)
 101 #define __KINLINE static inline
 102 #else
 103 #define __KINLINE static
 104 #endif
 105
 106
 107 /*
 108  *      Get the next cmsg header
 109  *
 110  *      PLEASE, do not touch this function. If you think, that it is
 111  *      incorrect, grep kernel sources and think about consequences
 112  *      before trying to improve it.
 113  *
 114  *      Now it always returns valid, not truncated ancillary object
 115  *      HEADER. But caller still MUST check, that cmsg->cmsg_len is
 116  *      inside range, given by msg->msg_controllen before using
 117  *      ansillary object DATA.                          --ANK (980731)
 118  */
 119
 120 __KINLINE struct cmsghdr * __cmsg_nxthdr(void *__ctl, __kernel_size_t __size,
 121                                                struct cmsghdr *__cmsg)
 122 {
 123         struct cmsghdr * __ptr;
 124
 125         __ptr = (struct cmsghdr*)(((unsigned char *) __cmsg) +  CMSG_ALIGN(__cmsg->cmsg_len));
 126         if ((unsigned long)((char*)(__ptr+1) - (char *) __ctl) > __size)
 127                 return (struct cmsghdr *)0;
 128
 129         return __ptr;
 130 }
 131
 132 __KINLINE struct cmsghdr * cmsg_nxthdr (struct msghdr *__msg, struct cmsghdr *__cmsg)
 133 {
 134         return __cmsg_nxthdr(__msg->msg_control, __msg->msg_controllen, __cmsg);
 135 }
 136
 137 /* "Socket"-level control message types: */
 138
 139 #define SCM_RIGHTS      0x01            /* rw: access rights (array of int) */
 140 #define SCM_CREDENTIALS 0x02            /* rw: struct ucred             */
 141 #define SCM_CONNECT     0x03            /* rw: struct scm_connect       */
 142
 143 struct ucred {
 144         __u32   pid;
 145         __u32   uid;
 146         __u32   gid;
 147 };
 148
 149 /* Supported address families. */
 150 #define AF_UNSPEC       0
 151 #define AF_UNIX         1       /* Unix domain sockets          */
 152 #define AF_LOCAL        1       /* POSIX name for AF_UNIX       */
 153 #define AF_INET         2       /* Internet IP Protocol         */
 154 #define AF_AX25         3       /* Amateur Radio AX.25          */
 155 #define AF_IPX          4       /* Novell IPX                   */
 156 #define AF_APPLETALK    5       /* AppleTalk DDP                */
 157 #define AF_NETROM       6       /* Amateur Radio NET/ROM        */
 158 #define AF_BRIDGE       7       /* Multiprotocol bridge         */
 159 #define AF_ATMPVC       8       /* ATM PVCs                     */
 160 #define AF_X25          9       /* Reserved for X.25 project    */
 161 #define AF_INET6        10      /* IP version 6                 */
 162 #define AF_ROSE         11      /* Amateur Radio X.25 PLP       */
 163 #define AF_DECnet       12      /* Reserved for DECnet project  */
 164 #define AF_NETBEUI      13      /* Reserved for 802.2LLC project*/
 165 #define AF_SECURITY     14      /* Security callback pseudo AF */
 166 #define AF_KEY          15      /* PF_KEY key management API */
 167 #define AF_NETLINK      16
 168 #define AF_ROUTE        AF_NETLINK /* Alias to emulate 4.4BSD */
 169 #define AF_PACKET       17      /* Packet family                */
 170 #define AF_ASH          18      /* Ash                          */
 171 #define AF_ECONET       19      /* Acorn Econet                 */
 172 #define AF_ATMSVC       20      /* ATM SVCs                     */
 173 #define AF_SNA          22      /* Linux SNA Project (nutters!) */
 174 #define AF_IRDA         23      /* IRDA sockets                 */
 175 #define AF_PPPOX        24      /* PPPoX sockets                */
 176 #define AF_WANPIPE      25      /* Wanpipe API Sockets */
 177 #define AF_LLC          26      /* Linux LLC                    */
 178 #define AF_BLUETOOTH    31      /* Bluetooth sockets            */
 179 #define AF_MAX          32      /* For now.. */
 180
 181 /* Protocol families, same as address families. */
 182 #define PF_UNSPEC       AF_UNSPEC
 183 #define PF_UNIX         AF_UNIX
 184 #define PF_LOCAL        AF_LOCAL
 185 #define PF_INET         AF_INET
 186 #define PF_AX25         AF_AX25
 187 #define PF_IPX          AF_IPX
 188 #define PF_APPLETALK    AF_APPLETALK
 189 #define PF_NETROM       AF_NETROM
 190 #define PF_BRIDGE       AF_BRIDGE
 191 #define PF_ATMPVC       AF_ATMPVC
 192 #define PF_X25          AF_X25
 193 #define PF_INET6        AF_INET6
 194 #define PF_ROSE         AF_ROSE
 195 #define PF_DECnet       AF_DECnet
 196 #define PF_NETBEUI      AF_NETBEUI
 197 #define PF_SECURITY     AF_SECURITY
 198 #define PF_KEY          AF_KEY
 199 #define PF_NETLINK      AF_NETLINK
 200 #define PF_ROUTE        AF_ROUTE
 201 #define PF_PACKET       AF_PACKET
 202 #define PF_ASH          AF_ASH
 203 #define PF_ECONET       AF_ECONET
 204 #define PF_ATMSVC       AF_ATMSVC
 205 #define PF_SNA          AF_SNA
 206 #define PF_IRDA         AF_IRDA
 207 #define PF_PPPOX        AF_PPPOX
 208 #define PF_WANPIPE      AF_WANPIPE
 209 #define PF_LLC          AF_LLC
 210 #define PF_BLUETOOTH    AF_BLUETOOTH
 211 #define PF_MAX          AF_MAX
 212
 213 /* Maximum queue length specifiable by listen.  */
 214 #define SOMAXCONN       128
 215
 216 /* Flags we can use with send/ and recv.
 217    Added those for 1003.1g not all are supported yet
 218  */
 219
 220 #define MSG_OOB         1
 221 #define MSG_PEEK        2
 222 #define MSG_DONTROUTE   4
 223 #define MSG_TRYHARD     4       /* Synonym for MSG_DONTROUTE for DECnet */
 224 #define MSG_CTRUNC      8
 225 #define MSG_PROBE       0x10    /* Do not send. Only probe path f.e. for MTU */
 226 #define MSG_TRUNC       0x20
 227 #define MSG_DONTWAIT    0x40    /* Nonblocking io                */
 228 #define MSG_EOR         0x80    /* End of record */
 229 #define MSG_WAITALL     0x100   /* Wait for a full request */
 230 #define MSG_FIN         0x200
 231 #define MSG_SYN         0x400
 232 #define MSG_CONFIRM     0x800   /* Confirm path validity */
 233 #define MSG_RST         0x1000
 234 #define MSG_ERRQUEUE    0x2000  /* Fetch message from error queue */
 235 #define MSG_NOSIGNAL    0x4000  /* Do not generate SIGPIPE */
 236 #define MSG_MORE        0x8000  /* Sender will send more */
 237
 238 #define MSG_EOF         MSG_FIN
 239
 240 #if defined(CONFIG_COMPAT)
 241 #define MSG_CMSG_COMPAT 0x80000000      /* This message needs 32 bit fixups */
 242 #else
 243 #define MSG_CMSG_COMPAT 0               /* We never have 32 bit fixups */
 244 #endif
 245
 246 extern asmlinkage long sys_sendmsg(int fd, struct msghdr __user *msg, unsigned flags);
 247 extern asmlinkage long sys_recvmsg(int fd, struct msghdr __user *msg, unsigned flags);
 248
 249
 250
 251 /* Setsockoptions(2) level. Thanks to BSD these must match IPPROTO_xxx */
 252 #define SOL_IP          0
 253 /* #define SOL_ICMP     1       No-no-no! Due to Linux :-) we cannot use SOL_ICMP=1 */
 254 #define SOL_TCP         6
 255 #define SOL_UDP         17
 256 #define SOL_IPV6        41
 257 #define SOL_ICMPV6      58
 258 #define SOL_SCTP        132
 259 #define SOL_RAW         255
 260 #define SOL_IPX         256
 261 #define SOL_AX25        257
 262 #define SOL_ATALK       258
 263 #define SOL_NETROM      259
 264 #define SOL_ROSE        260
 265 #define SOL_DECNET      261
 266 #define SOL_X25         262
 267 #define SOL_PACKET      263
 268 #define SOL_ATM         264     /* ATM layer (cell level) */
 269 #define SOL_AAL         265     /* ATM Adaption Layer (packet level) */
 270 #define SOL_IRDA        266
 271 #define SOL_NETBEUI     267
 272 #define SOL_LLC         268
 273
 274 /* IPX options */
 275 #define IPX_TYPE        1
 276
 277 #ifdef __KERNEL__
 278 extern int memcpy_fromiovec(unsigned char *kdata, struct iovec *iov, int len);
 279 extern int memcpy_fromiovecend(unsigned char *kdata, struct iovec *iov,
 280                                 int offset, int len);
 281 extern int csum_partial_copy_fromiovecend(unsigned char *kdata,
 282                                           struct iovec *iov,
 283                                           int offset,
 284                                           unsigned int len, int *csump);
 285
 286 extern int verify_iovec(struct msghdr *m, struct iovec *iov, char *address, int mode);
 287 extern int memcpy_toiovec(struct iovec *v, unsigned char *kdata, int len);
 288 extern void memcpy_tokerneliovec(struct iovec *iov, unsigned char *kdata, int len);
 289 extern int move_addr_to_user(void *kaddr, int klen, void __user *uaddr, int __user *ulen);
 290 extern int move_addr_to_kernel(void __user *uaddr, int ulen, void *kaddr);
 291 extern int put_cmsg(struct msghdr*, int level, int type, int len, void *data);
 292
 293 #endif
 294 #endif /* not kernel and not glibc */
 295 #endif /* _LINUX_SOCKET_H */