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 *      As we do 4.4BSD message passing we use a 4.4BSD message passing
  29 *      system, not 4.3. Thus msg_accrights(len) are now missing. They
  30 *      belong in an obscure libc emulation or the bin.
  31 */
  32 
  33struct msghdr {
  34        void    *       msg_name;       /* Socket name                  */
  35        int             msg_namelen;    /* Length of name               */
  36        struct iovec *  msg_iov;        /* Data blocks                  */
  37        __kernel_size_t msg_iovlen;     /* Number of blocks             */
  38        void    *       msg_control;    /* Per protocol magic (eg BSD file descriptor passing) */
  39        __kernel_size_t msg_controllen; /* Length of cmsg list */
  40        unsigned        msg_flags;
  41};
  42
  43/*
  44 *      POSIX 1003.1g - ancillary data object information
  45 *      Ancillary data consits of a sequence of pairs of
  46 *      (cmsghdr, cmsg_data[])
  47 */
  48
  49struct cmsghdr {
  50        __kernel_size_t cmsg_len;       /* data byte count, including hdr */
  51        int             cmsg_level;     /* originating protocol */
  52        int             cmsg_type;      /* protocol-specific type */
  53};
  54
  55/*
  56 *      Ancilliary data object information MACROS
  57 *      Table 5-14 of POSIX 1003.1g
  58 */
  59
  60#define __CMSG_NXTHDR(ctl, len, cmsg) __cmsg_nxthdr((ctl),(len),(cmsg))
  61#define CMSG_NXTHDR(mhdr, cmsg) cmsg_nxthdr((mhdr), (cmsg))
  62
  63#define CMSG_ALIGN(len) ( ((len)+sizeof(long)-1) & ~(sizeof(long)-1) )
  64
  65#define CMSG_DATA(cmsg) ((void *)((char *)(cmsg) + CMSG_ALIGN(sizeof(struct cmsghdr))))
  66#define CMSG_SPACE(len) (CMSG_ALIGN(sizeof(struct cmsghdr)) + CMSG_ALIGN(len))
  67#define CMSG_LEN(len) (CMSG_ALIGN(sizeof(struct cmsghdr)) + (len))
  68
  69#define __CMSG_FIRSTHDR(ctl,len) ((len) >= sizeof(struct cmsghdr) ? \
  70                                  (struct cmsghdr *)(ctl) : \
  71                                  (struct cmsghdr *)NULL)
  72#define CMSG_FIRSTHDR(msg)      __CMSG_FIRSTHDR((msg)->msg_control, (msg)->msg_controllen)
  73
  74/*
  75 *      This mess will go away with glibc
  76 */
  77 
  78#ifdef __KERNEL__
  79#define __KINLINE extern __inline__
  80#elif  defined(__GNUC__) 
  81#define __KINLINE static __inline__
  82#elif defined(__cplusplus)
  83#define __KINLINE static inline
  84#else
  85#define __KINLINE static
  86#endif
  87
  88
  89/*
  90 *      Get the next cmsg header
  91 *
  92 *      PLEASE, do not touch this function. If you think, that it is
  93 *      incorrect, grep kernel sources and think about consequences
  94 *      before trying to improve it.
  95 *
  96 *      Now it always returns valid, not truncated ancillary object
  97 *      HEADER. But caller still MUST check, that cmsg->cmsg_len is
  98 *      inside range, given by msg->msg_controllen before using
  99 *      ansillary object DATA.                          --ANK (980731)
 100 */
 101 
 102__KINLINE struct cmsghdr * __cmsg_nxthdr(void *__ctl, __kernel_size_t __size,
 103                                               struct cmsghdr *__cmsg)
 104{
 105        struct cmsghdr * __ptr;
 106
 107        __ptr = (struct cmsghdr*)(((unsigned char *) __cmsg) +  CMSG_ALIGN(__cmsg->cmsg_len));
 108        if ((unsigned long)((char*)(__ptr+1) - (char *) __ctl) > __size)
 109                return NULL;
 110
 111        return __ptr;
 112}
 113
 114__KINLINE struct cmsghdr * cmsg_nxthdr (struct msghdr *__msg, struct cmsghdr *__cmsg)
 115{
 116        return __cmsg_nxthdr(__msg->msg_control, __msg->msg_controllen, __cmsg);
 117}
 118
 119/* "Socket"-level control message types: */
 120
 121#define SCM_RIGHTS      0x01            /* rw: access rights (array of int) */
 122#define SCM_CREDENTIALS 0x02            /* rw: struct ucred             */
 123#define SCM_CONNECT     0x03            /* rw: struct scm_connect       */
 124
 125struct ucred {
 126        __u32   pid;
 127        __u32   uid;
 128        __u32   gid;
 129};
 130
 131/* Socket types. */
 132
 133#define SOCK_STREAM     1               /* stream (connection) socket   */
 134#define SOCK_DGRAM      2               /* datagram (conn.less) socket  */
 135#define SOCK_RAW        3               /* raw socket                   */
 136#define SOCK_RDM        4               /* reliably-delivered message   */
 137#define SOCK_SEQPACKET  5               /* sequential packet socket     */
 138#define SOCK_PACKET     10              /* linux specific way of        */
 139                                        /* getting packets at the dev   */
 140                                        /* level.  For writing rarp and */
 141                                        /* other similar things on the  */
 142                                        /* user level.                  */
 143
 144/* Supported address families. */
 145#define AF_UNSPEC       0
 146#define AF_UNIX         1       /* Unix domain sockets          */
 147#define AF_LOCAL        1       /* POSIX name for AF_UNIX       */
 148#define AF_INET         2       /* Internet IP Protocol         */
 149#define AF_AX25         3       /* Amateur Radio AX.25          */
 150#define AF_IPX          4       /* Novell IPX                   */
 151#define AF_APPLETALK    5       /* AppleTalk DDP                */
 152#define AF_NETROM       6       /* Amateur Radio NET/ROM        */
 153#define AF_BRIDGE       7       /* Multiprotocol bridge         */
 154#define AF_ATMPVC       8       /* ATM PVCs                     */
 155#define AF_X25          9       /* Reserved for X.25 project    */
 156#define AF_INET6        10      /* IP version 6                 */
 157#define AF_ROSE         11      /* Amateur Radio X.25 PLP       */
 158#define AF_DECnet       12      /* Reserved for DECnet project  */
 159#define AF_NETBEUI      13      /* Reserved for 802.2LLC project*/
 160#define AF_SECURITY     14      /* Security callback pseudo AF */
 161#define pseudo_AF_KEY   15      /* PF_KEY key management API */
 162#define AF_NETLINK      16
 163#define AF_ROUTE        AF_NETLINK /* Alias to emulate 4.4BSD */
 164#define AF_PACKET       17      /* Packet family                */
 165#define AF_ASH          18      /* Ash                          */
 166#define AF_ECONET       19      /* Acorn Econet                 */
 167#define AF_ATMSVC       20      /* ATM SVCs                     */
 168#define AF_SNA          22      /* Linux SNA Project (nutters!) */
 169#define AF_IRDA         23      /* IRDA sockets                 */
 170#define AF_MAX          32      /* For now.. */
 171
 172/* Protocol families, same as address families. */
 173#define PF_UNSPEC       AF_UNSPEC
 174#define PF_UNIX         AF_UNIX
 175#define PF_LOCAL        AF_LOCAL
 176#define PF_INET         AF_INET
 177#define PF_AX25         AF_AX25
 178#define PF_IPX          AF_IPX
 179#define PF_APPLETALK    AF_APPLETALK
 180#define PF_NETROM       AF_NETROM
 181#define PF_BRIDGE       AF_BRIDGE
 182#define PF_ATMPVC       AF_ATMPVC
 183#define PF_X25          AF_X25
 184#define PF_INET6        AF_INET6
 185#define PF_ROSE         AF_ROSE
 186#define PF_DECnet       AF_DECnet
 187#define PF_NETBEUI      AF_NETBEUI
 188#define PF_SECURITY     AF_SECURITY
 189#define PF_KEY          pseudo_AF_KEY
 190#define PF_NETLINK      AF_NETLINK
 191#define PF_ROUTE        AF_ROUTE
 192#define PF_PACKET       AF_PACKET
 193#define PF_ASH          AF_ASH
 194#define PF_ECONET       AF_ECONET
 195#define PF_ATMSVC       AF_ATMSVC
 196#define PF_SNA          AF_SNA
 197#define PF_IRDA         AF_IRDA
 198
 199#define PF_MAX          AF_MAX
 200
 201/* Maximum queue length specifiable by listen.  */
 202#define SOMAXCONN       128
 203
 204/* Flags we can use with send/ and recv. 
 205   Added those for 1003.1g not all are supported yet
 206 */
 207 
 208#define MSG_OOB         1
 209#define MSG_PEEK        2
 210#define MSG_DONTROUTE   4
 211#define MSG_TRYHARD     4       /* Synonym for MSG_DONTROUTE for DECnet */
 212#define MSG_CTRUNC      8
 213#define MSG_PROXY       0x10    /* Supply or ask second address. */
 214#define MSG_TRUNC       0x20
 215#define MSG_DONTWAIT    0x40    /* Nonblocking io                */
 216#define MSG_EOR         0x80    /* End of record */
 217#define MSG_WAITALL     0x100   /* Wait for a full request */
 218#define MSG_FIN         0x200
 219#define MSG_SYN         0x400
 220#define MSG_URG         0x800
 221#define MSG_RST         0x1000
 222#define MSG_ERRQUEUE    0x2000
 223#define MSG_NOSIGNAL    0x4000
 224
 225#define MSG_CTLIGNORE   0x80000000
 226
 227#define MSG_EOF         MSG_FIN
 228#define MSG_CTLFLAGS    (MSG_OOB|MSG_URG|MSG_FIN|MSG_SYN|MSG_RST)
 229
 230
 231/* Setsockoptions(2) level. Thanks to BSD these must match IPPROTO_xxx */
 232#define SOL_IP          0
 233/* #define SOL_ICMP     1       No-no-no! Due to Linux :-) we cannot use SOL_ICMP=1 */
 234#define SOL_TCP         6
 235#define SOL_UDP         17
 236#define SOL_IPV6        41
 237#define SOL_ICMPV6      58
 238#define SOL_RAW         255
 239#define SOL_IPX         256
 240#define SOL_AX25        257
 241#define SOL_ATALK       258
 242#define SOL_NETROM      259
 243#define SOL_ROSE        260
 244#define SOL_DECNET      261
 245#define SOL_X25         262
 246#define SOL_PACKET      263
 247#define SOL_ATM         264     /* ATM layer (cell level) */
 248#define SOL_AAL         265     /* ATM Adaption Layer (packet level) */
 249
 250/* IPX options */
 251#define IPX_TYPE        1
 252
 253/* TCP options - this way around because someone left a set in the c library includes */
 254#define TCP_NODELAY     1
 255#define TCP_MAXSEG      2
 256#define TCP_CORK        3       /* Linux specific (for use with sendfile) */
 257
 258#ifdef __KERNEL__
 259extern int memcpy_fromiovec(unsigned char *kdata, struct iovec *iov, int len);
 260extern int memcpy_fromiovecend(unsigned char *kdata, struct iovec *iov, 
 261                                int offset, int len);
 262extern int csum_partial_copy_fromiovecend(unsigned char *kdata, 
 263                                          struct iovec *iov, 
 264                                          int offset, 
 265                                          unsigned int len, int *csump);
 266
 267extern int verify_iovec(struct msghdr *m, struct iovec *iov, char *address, int mode);
 268extern int memcpy_toiovec(struct iovec *v, unsigned char *kdata, int len);
 269extern void memcpy_tokerneliovec(struct iovec *iov, unsigned char *kdata, int len);
 270extern int move_addr_to_user(void *kaddr, int klen, void *uaddr, int *ulen);
 271extern int move_addr_to_kernel(void *uaddr, int ulen, void *kaddr);
 272extern int put_cmsg(struct msghdr*, int level, int type, int len, void *data);
 273#endif
 274#endif /* not kernel and not glibc */
 275#endif /* _LINUX_SOCKET_H */
 276