LXR linux-old/include/linux/net.h

   1/*
   2 * NET          An implementation of the SOCKET network access protocol.
   3 *              This is the master header file for the Linux NET layer,
   4 *              or, in plain English: the networking handling part of the
   5 *              kernel.
   6 *
   7 * Version:     @(#)net.h       1.0.3   05/25/93
   8 *
   9 * Authors:     Orest Zborowski, <obz@Kodak.COM>
  10 *              Ross Biro, <bir7@leland.Stanford.Edu>
  11 *              Fred N. van Kempen, <waltje@uWalt.NL.Mugnet.ORG>
  12 *
  13 *              This program is free software; you can redistribute it and/or
  14 *              modify it under the terms of the GNU General Public License
  15 *              as published by the Free Software Foundation; either version
  16 *              2 of the License, or (at your option) any later version.
  17 */
  18#ifndef _LINUX_NET_H
  19#define _LINUX_NET_H
  20
  21#include <linux/config.h>
  22#include <linux/socket.h>
  23#include <linux/wait.h>
  24
  25struct poll_table_struct;
  26
  27#define NPROTO          32              /* should be enough for now..   */
  28
  29
  30#define SYS_SOCKET      1               /* sys_socket(2)                */
  31#define SYS_BIND        2               /* sys_bind(2)                  */
  32#define SYS_CONNECT     3               /* sys_connect(2)               */
  33#define SYS_LISTEN      4               /* sys_listen(2)                */
  34#define SYS_ACCEPT      5               /* sys_accept(2)                */
  35#define SYS_GETSOCKNAME 6               /* sys_getsockname(2)           */
  36#define SYS_GETPEERNAME 7               /* sys_getpeername(2)           */
  37#define SYS_SOCKETPAIR  8               /* sys_socketpair(2)            */
  38#define SYS_SEND        9               /* sys_send(2)                  */
  39#define SYS_RECV        10              /* sys_recv(2)                  */
  40#define SYS_SENDTO      11              /* sys_sendto(2)                */
  41#define SYS_RECVFROM    12              /* sys_recvfrom(2)              */
  42#define SYS_SHUTDOWN    13              /* sys_shutdown(2)              */
  43#define SYS_SETSOCKOPT  14              /* sys_setsockopt(2)            */
  44#define SYS_GETSOCKOPT  15              /* sys_getsockopt(2)            */
  45#define SYS_SENDMSG     16              /* sys_sendmsg(2)               */
  46#define SYS_RECVMSG     17              /* sys_recvmsg(2)               */
  47
  48
  49typedef enum {
  50  SS_FREE = 0,                          /* not allocated                */
  51  SS_UNCONNECTED,                       /* unconnected to any socket    */
  52  SS_CONNECTING,                        /* in process of connecting     */
  53  SS_CONNECTED,                         /* connected to socket          */
  54  SS_DISCONNECTING                      /* in process of disconnecting  */
  55} socket_state;
  56
  57#define __SO_ACCEPTCON  (1<<16)         /* performed a listen           */
  58
  59#ifdef __KERNEL__
  60
  61#define SOCK_ASYNC_NOSPACE      0
  62#define SOCK_ASYNC_WAITDATA     1
  63#define SOCK_NOSPACE            2
  64
  65struct socket
  66{
  67        socket_state            state;
  68
  69        unsigned long           flags;
  70        struct proto_ops        *ops;
  71        struct inode            *inode;
  72        struct fasync_struct    *fasync_list;   /* Asynchronous wake up list    */
  73        struct file             *file;          /* File back pointer for gc     */
  74        struct sock             *sk;
  75        wait_queue_head_t       wait;
  76
  77        short                   type;
  78        unsigned char           passcred;
  79};
  80
  81#define SOCK_INODE(S)   ((S)->inode)
  82
  83struct scm_cookie;
  84struct vm_area_struct;
  85struct page;
  86
  87struct proto_ops {
  88  int   family;
  89
  90  int   (*release)      (struct socket *sock);
  91  int   (*bind)         (struct socket *sock, struct sockaddr *umyaddr,
  92                         int sockaddr_len);
  93  int   (*connect)      (struct socket *sock, struct sockaddr *uservaddr,
  94                         int sockaddr_len, int flags);
  95  int   (*socketpair)   (struct socket *sock1, struct socket *sock2);
  96  int   (*accept)       (struct socket *sock, struct socket *newsock,
  97                         int flags);
  98  int   (*getname)      (struct socket *sock, struct sockaddr *uaddr,
  99                         int *usockaddr_len, int peer);
 100  unsigned int (*poll)  (struct file *file, struct socket *sock, struct poll_table_struct *wait);
 101  int   (*ioctl)        (struct socket *sock, unsigned int cmd,
 102                         unsigned long arg);
 103  int   (*listen)       (struct socket *sock, int len);
 104  int   (*shutdown)     (struct socket *sock, int flags);
 105  int   (*setsockopt)   (struct socket *sock, int level, int optname,
 106                         char *optval, int optlen);
 107  int   (*getsockopt)   (struct socket *sock, int level, int optname,
 108                         char *optval, int *optlen);
 109  int   (*sendmsg)      (struct socket *sock, struct msghdr *m, int total_len, struct scm_cookie *scm);
 110  int   (*recvmsg)      (struct socket *sock, struct msghdr *m, int total_len, int flags, struct scm_cookie *scm);
 111  int   (*mmap)         (struct file *file, struct socket *sock, struct vm_area_struct * vma);
 112  ssize_t (*sendpage)   (struct socket *sock, struct page *page, int offset, size_t size, int flags);
 113};
 114
 115struct net_proto_family 
 116{
 117        int     family;
 118        int     (*create)(struct socket *sock, int protocol);
 119        /* These are counters for the number of different methods of
 120           each we support */
 121        short   authentication;
 122        short   encryption;
 123        short   encrypt_net;
 124};
 125
 126struct net_proto 
 127{
 128        const char *name;               /* Protocol name */
 129        void (*init_func)(struct net_proto *);  /* Bootstrap */
 130};
 131
 132extern int      sock_wake_async(struct socket *sk, int how, int band);
 133extern int      sock_register(struct net_proto_family *fam);
 134extern int      sock_unregister(int family);
 135extern struct socket *sock_alloc(void);
 136extern int      sock_create(int family, int type, int proto, struct socket **);
 137extern void     sock_release(struct socket *);
 138extern int      sock_sendmsg(struct socket *, struct msghdr *m, int len);
 139extern int      sock_recvmsg(struct socket *, struct msghdr *m, int len, int flags);
 140extern int      sock_readv_writev(int type, struct inode * inode, struct file * file,
 141                                  const struct iovec * iov, long count, long size);
 142extern struct socket *sockfd_lookup(int fd, int *err);
 143
 144extern int      sock_map_fd(struct socket *sock);
 145extern int      net_ratelimit(void);
 146extern unsigned long net_random(void);
 147extern void net_srandom(unsigned long);
 148
 149#ifndef CONFIG_SMP
 150#define SOCKOPS_WRAPPED(name) name
 151#define SOCKOPS_WRAP(name, fam)
 152#else
 153
 154#define SOCKOPS_WRAPPED(name) __unlocked_##name
 155
 156#define SOCKCALL_WRAP(name, call, parms, args)          \
 157static int __lock_##name##_##call  parms                \
 158{                                                       \
 159        int ret;                                        \
 160        lock_kernel();                                  \
 161        ret = __unlocked_##name##_ops.call  args ;\
 162        unlock_kernel();                                \
 163        return ret;                                     \
 164}
 165
 166#define SOCKCALL_UWRAP(name, call, parms, args)         \
 167static unsigned int __lock_##name##_##call  parms       \
 168{                                                       \
 169        int ret;                                        \
 170        lock_kernel();                                  \
 171        ret = __unlocked_##name##_ops.call  args ;\
 172        unlock_kernel();                                \
 173        return ret;                                     \
 174}
 175
 176
 177#define SOCKOPS_WRAP(name, fam)                                 \
 178SOCKCALL_WRAP(name, release, (struct socket *sock), (sock))     \
 179SOCKCALL_WRAP(name, bind, (struct socket *sock, struct sockaddr *uaddr, int addr_len), \
 180              (sock, uaddr, addr_len))                          \
 181SOCKCALL_WRAP(name, connect, (struct socket *sock, struct sockaddr * uaddr, \
 182                              int addr_len, int flags),         \
 183              (sock, uaddr, addr_len, flags))                   \
 184SOCKCALL_WRAP(name, socketpair, (struct socket *sock1, struct socket *sock2), \
 185              (sock1, sock2))                                   \
 186SOCKCALL_WRAP(name, accept, (struct socket *sock, struct socket *newsock, \
 187                         int flags), (sock, newsock, flags)) \
 188SOCKCALL_WRAP(name, getname, (struct socket *sock, struct sockaddr *uaddr, \
 189                         int *addr_len, int peer), (sock, uaddr, addr_len, peer)) \
 190SOCKCALL_UWRAP(name, poll, (struct file *file, struct socket *sock, struct poll_table_struct *wait), \
 191              (file, sock, wait)) \
 192SOCKCALL_WRAP(name, ioctl, (struct socket *sock, unsigned int cmd, \
 193                         unsigned long arg), (sock, cmd, arg)) \
 194SOCKCALL_WRAP(name, listen, (struct socket *sock, int len), (sock, len)) \
 195SOCKCALL_WRAP(name, shutdown, (struct socket *sock, int flags), (sock, flags)) \
 196SOCKCALL_WRAP(name, setsockopt, (struct socket *sock, int level, int optname, \
 197                         char *optval, int optlen), (sock, level, optname, optval, optlen)) \
 198SOCKCALL_WRAP(name, getsockopt, (struct socket *sock, int level, int optname, \
 199                         char *optval, int *optlen), (sock, level, optname, optval, optlen)) \
 200SOCKCALL_WRAP(name, sendmsg, (struct socket *sock, struct msghdr *m, int len, struct scm_cookie *scm), \
 201              (sock, m, len, scm)) \
 202SOCKCALL_WRAP(name, recvmsg, (struct socket *sock, struct msghdr *m, int len, int flags, struct scm_cookie *scm), \
 203              (sock, m, len, flags, scm)) \
 204SOCKCALL_WRAP(name, mmap, (struct file *file, struct socket *sock, struct vm_area_struct *vma), \
 205              (file, sock, vma)) \
 206              \
 207static struct proto_ops name##_ops = {                  \
 208        family:         fam,                            \
 209                                                        \
 210        release:        __lock_##name##_release,        \
 211        bind:           __lock_##name##_bind,           \
 212        connect:        __lock_##name##_connect,        \
 213        socketpair:     __lock_##name##_socketpair,     \
 214        accept:         __lock_##name##_accept,         \
 215        getname:        __lock_##name##_getname,        \
 216        poll:           __lock_##name##_poll,           \
 217        ioctl:          __lock_##name##_ioctl,          \
 218        listen:         __lock_##name##_listen,         \
 219        shutdown:       __lock_##name##_shutdown,       \
 220        setsockopt:     __lock_##name##_setsockopt,     \
 221        getsockopt:     __lock_##name##_getsockopt,     \
 222        sendmsg:        __lock_##name##_sendmsg,        \
 223        recvmsg:        __lock_##name##_recvmsg,        \
 224        mmap:           __lock_##name##_mmap,           \
 225};
 226#endif
 227
 228
 229#endif /* __KERNEL__ */
 230#endif  /* _LINUX_NET_H */
 231