linux/include/linux/socket.h
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   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
  11typedef unsigned short __kernel_sa_family_t;
  12
  13struct __kernel_sockaddr_storage {
  14        __kernel_sa_family_t    ss_family;              /* address family */
  15        /* Following field(s) are implementation specific */
  16        char            __data[_K_SS_MAXSIZE - sizeof(unsigned short)];
  17                                /* space to achieve desired size, */
  18                                /* _SS_MAXSIZE value minus size of ss_family */
  19} __attribute__ ((aligned(_K_SS_ALIGNSIZE)));   /* force desired alignment */
  20
  21#ifdef __KERNEL__
  22
  23#include <asm/socket.h>                 /* arch-dependent defines       */
  24#include <linux/sockios.h>              /* the SIOCxxx I/O controls     */
  25#include <linux/uio.h>                  /* iovec support                */
  26#include <linux/types.h>                /* pid_t                        */
  27#include <linux/compiler.h>             /* __user                       */
  28
  29struct pid;
  30struct cred;
  31
  32#define __sockaddr_check_size(size)     \
  33        BUILD_BUG_ON(((size) > sizeof(struct __kernel_sockaddr_storage)))
  34
  35#ifdef CONFIG_PROC_FS
  36struct seq_file;
  37extern void socket_seq_show(struct seq_file *seq);
  38#endif
  39
  40typedef __kernel_sa_family_t    sa_family_t;
  41
  42/*
  43 *      1003.1g requires sa_family_t and that sa_data is char.
  44 */
  45 
  46struct sockaddr {
  47        sa_family_t     sa_family;      /* address family, AF_xxx       */
  48        char            sa_data[14];    /* 14 bytes of protocol address */
  49};
  50
  51struct linger {
  52        int             l_onoff;        /* Linger active                */
  53        int             l_linger;       /* How long to linger for       */
  54};
  55
  56#define sockaddr_storage __kernel_sockaddr_storage
  57
  58/*
  59 *      As we do 4.4BSD message passing we use a 4.4BSD message passing
  60 *      system, not 4.3. Thus msg_accrights(len) are now missing. They
  61 *      belong in an obscure libc emulation or the bin.
  62 */
  63 
  64struct msghdr {
  65        void    *       msg_name;       /* Socket name                  */
  66        int             msg_namelen;    /* Length of name               */
  67        struct iovec *  msg_iov;        /* Data blocks                  */
  68        __kernel_size_t msg_iovlen;     /* Number of blocks             */
  69        void    *       msg_control;    /* Per protocol magic (eg BSD file descriptor passing) */
  70        __kernel_size_t msg_controllen; /* Length of cmsg list */
  71        unsigned int    msg_flags;
  72};
  73
  74/* For recvmmsg/sendmmsg */
  75struct mmsghdr {
  76        struct msghdr   msg_hdr;
  77        unsigned int        msg_len;
  78};
  79
  80/*
  81 *      POSIX 1003.1g - ancillary data object information
  82 *      Ancillary data consits of a sequence of pairs of
  83 *      (cmsghdr, cmsg_data[])
  84 */
  85
  86struct cmsghdr {
  87        __kernel_size_t cmsg_len;       /* data byte count, including hdr */
  88        int             cmsg_level;     /* originating protocol */
  89        int             cmsg_type;      /* protocol-specific type */
  90};
  91
  92/*
  93 *      Ancillary data object information MACROS
  94 *      Table 5-14 of POSIX 1003.1g
  95 */
  96
  97#define __CMSG_NXTHDR(ctl, len, cmsg) __cmsg_nxthdr((ctl),(len),(cmsg))
  98#define CMSG_NXTHDR(mhdr, cmsg) cmsg_nxthdr((mhdr), (cmsg))
  99
 100#define CMSG_ALIGN(len) ( ((len)+sizeof(long)-1) & ~(sizeof(long)-1) )
 101
 102#define CMSG_DATA(cmsg) ((void *)((char *)(cmsg) + CMSG_ALIGN(sizeof(struct cmsghdr))))
 103#define CMSG_SPACE(len) (CMSG_ALIGN(sizeof(struct cmsghdr)) + CMSG_ALIGN(len))
 104#define CMSG_LEN(len) (CMSG_ALIGN(sizeof(struct cmsghdr)) + (len))
 105
 106#define __CMSG_FIRSTHDR(ctl,len) ((len) >= sizeof(struct cmsghdr) ? \
 107                                  (struct cmsghdr *)(ctl) : \
 108                                  (struct cmsghdr *)NULL)
 109#define CMSG_FIRSTHDR(msg)      __CMSG_FIRSTHDR((msg)->msg_control, (msg)->msg_controllen)
 110#define CMSG_OK(mhdr, cmsg) ((cmsg)->cmsg_len >= sizeof(struct cmsghdr) && \
 111                             (cmsg)->cmsg_len <= (unsigned long) \
 112                             ((mhdr)->msg_controllen - \
 113                              ((char *)(cmsg) - (char *)(mhdr)->msg_control)))
 114
 115/*
 116 *      Get the next cmsg header
 117 *
 118 *      PLEASE, do not touch this function. If you think, that it is
 119 *      incorrect, grep kernel sources and think about consequences
 120 *      before trying to improve it.
 121 *
 122 *      Now it always returns valid, not truncated ancillary object
 123 *      HEADER. But caller still MUST check, that cmsg->cmsg_len is
 124 *      inside range, given by msg->msg_controllen before using
 125 *      ancillary object DATA.                          --ANK (980731)
 126 */
 127 
 128static inline struct cmsghdr * __cmsg_nxthdr(void *__ctl, __kernel_size_t __size,
 129                                               struct cmsghdr *__cmsg)
 130{
 131        struct cmsghdr * __ptr;
 132
 133        __ptr = (struct cmsghdr*)(((unsigned char *) __cmsg) +  CMSG_ALIGN(__cmsg->cmsg_len));
 134        if ((unsigned long)((char*)(__ptr+1) - (char *) __ctl) > __size)
 135                return (struct cmsghdr *)0;
 136
 137        return __ptr;
 138}
 139
 140static inline struct cmsghdr * cmsg_nxthdr (struct msghdr *__msg, struct cmsghdr *__cmsg)
 141{
 142        return __cmsg_nxthdr(__msg->msg_control, __msg->msg_controllen, __cmsg);
 143}
 144
 145/* "Socket"-level control message types: */
 146
 147#define SCM_RIGHTS      0x01            /* rw: access rights (array of int) */
 148#define SCM_CREDENTIALS 0x02            /* rw: struct ucred             */
 149#define SCM_SECURITY    0x03            /* rw: security label           */
 150
 151struct ucred {
 152        __u32   pid;
 153        __u32   uid;
 154        __u32   gid;
 155};
 156
 157/* Supported address families. */
 158#define AF_UNSPEC       0
 159#define AF_UNIX         1       /* Unix domain sockets          */
 160#define AF_LOCAL        1       /* POSIX name for AF_UNIX       */
 161#define AF_INET         2       /* Internet IP Protocol         */
 162#define AF_AX25         3       /* Amateur Radio AX.25          */
 163#define AF_IPX          4       /* Novell IPX                   */
 164#define AF_APPLETALK    5       /* AppleTalk DDP                */
 165#define AF_NETROM       6       /* Amateur Radio NET/ROM        */
 166#define AF_BRIDGE       7       /* Multiprotocol bridge         */
 167#define AF_ATMPVC       8       /* ATM PVCs                     */
 168#define AF_X25          9       /* Reserved for X.25 project    */
 169#define AF_INET6        10      /* IP version 6                 */
 170#define AF_ROSE         11      /* Amateur Radio X.25 PLP       */
 171#define AF_DECnet       12      /* Reserved for DECnet project  */
 172#define AF_NETBEUI      13      /* Reserved for 802.2LLC project*/
 173#define AF_SECURITY     14      /* Security callback pseudo AF */
 174#define AF_KEY          15      /* PF_KEY key management API */
 175#define AF_NETLINK      16
 176#define AF_ROUTE        AF_NETLINK /* Alias to emulate 4.4BSD */
 177#define AF_PACKET       17      /* Packet family                */
 178#define AF_ASH          18      /* Ash                          */
 179#define AF_ECONET       19      /* Acorn Econet                 */
 180#define AF_ATMSVC       20      /* ATM SVCs                     */
 181#define AF_RDS          21      /* RDS sockets                  */
 182#define AF_SNA          22      /* Linux SNA Project (nutters!) */
 183#define AF_IRDA         23      /* IRDA sockets                 */
 184#define AF_PPPOX        24      /* PPPoX sockets                */
 185#define AF_WANPIPE      25      /* Wanpipe API Sockets */
 186#define AF_LLC          26      /* Linux LLC                    */
 187#define AF_CAN          29      /* Controller Area Network      */
 188#define AF_TIPC         30      /* TIPC sockets                 */
 189#define AF_BLUETOOTH    31      /* Bluetooth sockets            */
 190#define AF_IUCV         32      /* IUCV sockets                 */
 191#define AF_RXRPC        33      /* RxRPC sockets                */
 192#define AF_ISDN         34      /* mISDN sockets                */
 193#define AF_PHONET       35      /* Phonet sockets               */
 194#define AF_IEEE802154   36      /* IEEE802154 sockets           */
 195#define AF_CAIF         37      /* CAIF sockets                 */
 196#define AF_ALG          38      /* Algorithm sockets            */
 197#define AF_NFC          39      /* NFC sockets                  */
 198#define AF_MAX          40      /* For now.. */
 199
 200/* Protocol families, same as address families. */
 201#define PF_UNSPEC       AF_UNSPEC
 202#define PF_UNIX         AF_UNIX
 203#define PF_LOCAL        AF_LOCAL
 204#define PF_INET         AF_INET
 205#define PF_AX25         AF_AX25
 206#define PF_IPX          AF_IPX
 207#define PF_APPLETALK    AF_APPLETALK
 208#define PF_NETROM       AF_NETROM
 209#define PF_BRIDGE       AF_BRIDGE
 210#define PF_ATMPVC       AF_ATMPVC
 211#define PF_X25          AF_X25
 212#define PF_INET6        AF_INET6
 213#define PF_ROSE         AF_ROSE
 214#define PF_DECnet       AF_DECnet
 215#define PF_NETBEUI      AF_NETBEUI
 216#define PF_SECURITY     AF_SECURITY
 217#define PF_KEY          AF_KEY
 218#define PF_NETLINK      AF_NETLINK
 219#define PF_ROUTE        AF_ROUTE
 220#define PF_PACKET       AF_PACKET
 221#define PF_ASH          AF_ASH
 222#define PF_ECONET       AF_ECONET
 223#define PF_ATMSVC       AF_ATMSVC
 224#define PF_RDS          AF_RDS
 225#define PF_SNA          AF_SNA
 226#define PF_IRDA         AF_IRDA
 227#define PF_PPPOX        AF_PPPOX
 228#define PF_WANPIPE      AF_WANPIPE
 229#define PF_LLC          AF_LLC
 230#define PF_CAN          AF_CAN
 231#define PF_TIPC         AF_TIPC
 232#define PF_BLUETOOTH    AF_BLUETOOTH
 233#define PF_IUCV         AF_IUCV
 234#define PF_RXRPC        AF_RXRPC
 235#define PF_ISDN         AF_ISDN
 236#define PF_PHONET       AF_PHONET
 237#define PF_IEEE802154   AF_IEEE802154
 238#define PF_CAIF         AF_CAIF
 239#define PF_ALG          AF_ALG
 240#define PF_NFC          AF_NFC
 241#define PF_MAX          AF_MAX
 242
 243/* Maximum queue length specifiable by listen.  */
 244#define SOMAXCONN       128
 245
 246/* Flags we can use with send/ and recv. 
 247   Added those for 1003.1g not all are supported yet
 248 */
 249 
 250#define MSG_OOB         1
 251#define MSG_PEEK        2
 252#define MSG_DONTROUTE   4
 253#define MSG_TRYHARD     4       /* Synonym for MSG_DONTROUTE for DECnet */
 254#define MSG_CTRUNC      8
 255#define MSG_PROBE       0x10    /* Do not send. Only probe path f.e. for MTU */
 256#define MSG_TRUNC       0x20
 257#define MSG_DONTWAIT    0x40    /* Nonblocking io                */
 258#define MSG_EOR         0x80    /* End of record */
 259#define MSG_WAITALL     0x100   /* Wait for a full request */
 260#define MSG_FIN         0x200
 261#define MSG_SYN         0x400
 262#define MSG_CONFIRM     0x800   /* Confirm path validity */
 263#define MSG_RST         0x1000
 264#define MSG_ERRQUEUE    0x2000  /* Fetch message from error queue */
 265#define MSG_NOSIGNAL    0x4000  /* Do not generate SIGPIPE */
 266#define MSG_MORE        0x8000  /* Sender will send more */
 267#define MSG_WAITFORONE  0x10000 /* recvmmsg(): block until 1+ packets avail */
 268#define MSG_SENDPAGE_NOTLAST 0x20000 /* sendpage() internal : not the last page */
 269#define MSG_EOF         MSG_FIN
 270
 271#define MSG_FASTOPEN    0x20000000      /* Send data in TCP SYN */
 272#define MSG_CMSG_CLOEXEC 0x40000000     /* Set close_on_exit for file
 273                                           descriptor received through
 274                                           SCM_RIGHTS */
 275#if defined(CONFIG_COMPAT)
 276#define MSG_CMSG_COMPAT 0x80000000      /* This message needs 32 bit fixups */
 277#else
 278#define MSG_CMSG_COMPAT 0               /* We never have 32 bit fixups */
 279#endif
 280
 281
 282/* Setsockoptions(2) level. Thanks to BSD these must match IPPROTO_xxx */
 283#define SOL_IP          0
 284/* #define SOL_ICMP     1       No-no-no! Due to Linux :-) we cannot use SOL_ICMP=1 */
 285#define SOL_TCP         6
 286#define SOL_UDP         17
 287#define SOL_IPV6        41
 288#define SOL_ICMPV6      58
 289#define SOL_SCTP        132
 290#define SOL_UDPLITE     136     /* UDP-Lite (RFC 3828) */
 291#define SOL_RAW         255
 292#define SOL_IPX         256
 293#define SOL_AX25        257
 294#define SOL_ATALK       258
 295#define SOL_NETROM      259
 296#define SOL_ROSE        260
 297#define SOL_DECNET      261
 298#define SOL_X25         262
 299#define SOL_PACKET      263
 300#define SOL_ATM         264     /* ATM layer (cell level) */
 301#define SOL_AAL         265     /* ATM Adaption Layer (packet level) */
 302#define SOL_IRDA        266
 303#define SOL_NETBEUI     267
 304#define SOL_LLC         268
 305#define SOL_DCCP        269
 306#define SOL_NETLINK     270
 307#define SOL_TIPC        271
 308#define SOL_RXRPC       272
 309#define SOL_PPPOL2TP    273
 310#define SOL_BLUETOOTH   274
 311#define SOL_PNPIPE      275
 312#define SOL_RDS         276
 313#define SOL_IUCV        277
 314#define SOL_CAIF        278
 315#define SOL_ALG         279
 316
 317/* IPX options */
 318#define IPX_TYPE        1
 319
 320extern void cred_to_ucred(struct pid *pid, const struct cred *cred, struct ucred *ucred);
 321
 322extern int memcpy_fromiovec(unsigned char *kdata, struct iovec *iov, int len);
 323extern int memcpy_fromiovecend(unsigned char *kdata, const struct iovec *iov,
 324                               int offset, int len);
 325extern int csum_partial_copy_fromiovecend(unsigned char *kdata, 
 326                                          struct iovec *iov, 
 327                                          int offset, 
 328                                          unsigned int len, __wsum *csump);
 329
 330extern int verify_iovec(struct msghdr *m, struct iovec *iov, struct sockaddr_storage *address, int mode);
 331extern int memcpy_toiovec(struct iovec *v, unsigned char *kdata, int len);
 332extern int memcpy_toiovecend(const struct iovec *v, unsigned char *kdata,
 333                             int offset, int len);
 334extern int move_addr_to_kernel(void __user *uaddr, int ulen, struct sockaddr_storage *kaddr);
 335extern int put_cmsg(struct msghdr*, int level, int type, int len, void *data);
 336
 337struct timespec;
 338
 339extern int __sys_recvmmsg(int fd, struct mmsghdr __user *mmsg, unsigned int vlen,
 340                          unsigned int flags, struct timespec *timeout);
 341extern int __sys_sendmmsg(int fd, struct mmsghdr __user *mmsg,
 342                          unsigned int vlen, unsigned int flags);
 343#endif /* not kernel and not glibc */
 344#endif /* _LINUX_SOCKET_H */
 345
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