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