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