i386/linux-2.3.21/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/socket.h>
  22 #include <linux/wait.h>
  23
  24 struct poll_table_struct;
  25
  26 #define NPROTO          32              /* should be enough for now..   */
  27
  28
  29 #define SYS_SOCKET      1               /* sys_socket(2)                */
  30 #define SYS_BIND        2               /* sys_bind(2)                  */
  31 #define SYS_CONNECT     3               /* sys_connect(2)               */
  32 #define SYS_LISTEN      4               /* sys_listen(2)                */
  33 #define SYS_ACCEPT      5               /* sys_accept(2)                */
  34 #define SYS_GETSOCKNAME 6               /* sys_getsockname(2)           */
  35 #define SYS_GETPEERNAME 7               /* sys_getpeername(2)           */
  36 #define SYS_SOCKETPAIR  8               /* sys_socketpair(2)            */
  37 #define SYS_SEND        9               /* sys_send(2)                  */
  38 #define SYS_RECV        10              /* sys_recv(2)                  */
  39 #define SYS_SENDTO      11              /* sys_sendto(2)                */
  40 #define SYS_RECVFROM    12              /* sys_recvfrom(2)              */
  41 #define SYS_SHUTDOWN    13              /* sys_shutdown(2)              */
  42 #define SYS_SETSOCKOPT  14              /* sys_setsockopt(2)            */
  43 #define SYS_GETSOCKOPT  15              /* sys_getsockopt(2)            */
  44 #define SYS_SENDMSG     16              /* sys_sendmsg(2)               */
  45 #define SYS_RECVMSG     17              /* sys_recvmsg(2)               */
  46
  47
  48 typedef enum {
  49   SS_FREE = 0,                          /* not allocated                */
  50   SS_UNCONNECTED,                       /* unconnected to any socket    */
  51   SS_CONNECTING,                        /* in process of connecting     */
  52   SS_CONNECTED,                         /* connected to socket          */
  53   SS_DISCONNECTING                      /* in process of disconnecting  */
  54 } socket_state;
  55
  56 #define SO_ACCEPTCON    (1<<16)         /* performed a listen           */
  57 #define SO_WAITDATA     (1<<17)         /* wait data to read            */
  58 #define SO_NOSPACE      (1<<18)         /* no space to write            */
  59
  60 #ifdef __KERNEL__
  61
  62 struct socket
  63 {
  64         socket_state            state;
  65
  66         unsigned long           flags;
  67         struct proto_ops        *ops;
  68         struct inode            *inode;
  69         struct fasync_struct    *fasync_list;   /* Asynchronous wake up list    */
  70         struct file             *file;          /* File back pointer for gc     */
  71         struct sock             *sk;
  72         wait_queue_head_t       wait;
  73
  74         short                   type;
  75         unsigned char           passcred;
  76 };
  77
  78 #define SOCK_INODE(S)   ((S)->inode)
  79
  80 struct scm_cookie;
  81 struct vm_area_struct;
  82
  83 struct proto_ops {
  84   int   family;
  85
  86   int   (*release)      (struct socket *sock);
  87   int   (*bind)         (struct socket *sock, struct sockaddr *umyaddr,
  88                          int sockaddr_len);
  89   int   (*connect)      (struct socket *sock, struct sockaddr *uservaddr,
  90                          int sockaddr_len, int flags);
  91   int   (*socketpair)   (struct socket *sock1, struct socket *sock2);
  92   int   (*accept)       (struct socket *sock, struct socket *newsock,
  93                          int flags);
  94   int   (*getname)      (struct socket *sock, struct sockaddr *uaddr,
  95                          int *usockaddr_len, int peer);
  96   unsigned int (*poll)  (struct file *file, struct socket *sock, struct poll_table_struct *wait);
  97   int   (*ioctl)        (struct socket *sock, unsigned int cmd,
  98                          unsigned long arg);
  99   int   (*listen)       (struct socket *sock, int len);
 100   int   (*shutdown)     (struct socket *sock, int flags);
 101   int   (*setsockopt)   (struct socket *sock, int level, int optname,
 102                          char *optval, int optlen);
 103   int   (*getsockopt)   (struct socket *sock, int level, int optname,
 104                          char *optval, int *optlen);
 105   int   (*fcntl)        (struct socket *sock, unsigned int cmd,
 106                          unsigned long arg);
 107   int   (*sendmsg)      (struct socket *sock, struct msghdr *m, int total_len, struct scm_cookie *scm);
 108   int   (*recvmsg)      (struct socket *sock, struct msghdr *m, int total_len, int flags, struct scm_cookie *scm);
 109   int   (*mmap)         (struct file *file, struct socket *sock, struct vm_area_struct * vma);
 110 };
 111
 112 struct net_proto_family
 113 {
 114         int     family;
 115         int     (*create)(struct socket *sock, int protocol);
 116         /* These are counters for the number of different methods of
 117            each we support */
 118         short   authentication;
 119         short   encryption;
 120         short   encrypt_net;
 121 };
 122
 123 struct net_proto
 124 {
 125         const char *name;               /* Protocol name */
 126         void (*init_func)(struct net_proto *);  /* Bootstrap */
 127 };
 128
 129 extern int      sock_wake_async(struct socket *sk, int how, int band);
 130 extern int      sock_register(struct net_proto_family *fam);
 131 extern int      sock_unregister(int family);
 132 extern struct socket *sock_alloc(void);
 133 extern int      sock_create(int family, int type, int proto, struct socket **);
 134 extern void     sock_release(struct socket *);
 135 extern int      sock_sendmsg(struct socket *, struct msghdr *m, int len);
 136 extern int      sock_recvmsg(struct socket *, struct msghdr *m, int len, int flags);
 137 extern int      sock_readv_writev(int type, struct inode * inode, struct file * file,
 138                                   const struct iovec * iov, long count, long size);
 139
 140 extern int      net_ratelimit(void);
 141 extern unsigned long net_random(void);
 142 extern void net_srandom(unsigned long);
 143
 144 #ifndef __SMP__
 145 #define SOCKOPS_WRAPPED(name) name
 146 #define SOCKOPS_WRAP(name, fam)
 147 #else
 148
 149 #define SOCKOPS_WRAPPED(name) __unlocked_##name
 150
 151 #define SOCKCALL_WRAP(name, call, parms, args)          \
 152 static int __lock_##name##_##call  parms                \
 153 {                                                       \
 154         int ret;                                        \
 155         lock_kernel();                                  \
 156         ret = __unlocked_##name##_ops.call  args ;\
 157         unlock_kernel();                                \
 158         return ret;                                     \
 159 }
 160
 161 #define SOCKCALL_UWRAP(name, call, parms, args)         \
 162 static unsigned int __lock_##name##_##call  parms       \
 163 {                                                       \
 164         int ret;                                        \
 165         lock_kernel();                                  \
 166         ret = __unlocked_##name##_ops.call  args ;\
 167         unlock_kernel();                                \
 168         return ret;                                     \
 169 }
 170
 171
 172 #define SOCKOPS_WRAP(name, fam)                                 \
 173 SOCKCALL_WRAP(name, release, (struct socket *sock), (sock))     \
 174 SOCKCALL_WRAP(name, bind, (struct socket *sock, struct sockaddr *uaddr, int addr_len), \
 175               (sock, uaddr, addr_len))                          \
 176 SOCKCALL_WRAP(name, connect, (struct socket *sock, struct sockaddr * uaddr, \
 177                               int addr_len, int flags),         \
 178               (sock, uaddr, addr_len, flags))                   \
 179 SOCKCALL_WRAP(name, socketpair, (struct socket *sock1, struct socket *sock2), \
 180               (sock1, sock2))                                   \
 181 SOCKCALL_WRAP(name, accept, (struct socket *sock, struct socket *newsock, \
 182                          int flags), (sock, newsock, flags)) \
 183 SOCKCALL_WRAP(name, getname, (struct socket *sock, struct sockaddr *uaddr, \
 184                          int *addr_len, int peer), (sock, uaddr, addr_len, peer)) \
 185 SOCKCALL_UWRAP(name, poll, (struct file *file, struct socket *sock, struct poll_table_struct *wait), \
 186               (file, sock, wait)) \
 187 SOCKCALL_WRAP(name, ioctl, (struct socket *sock, unsigned int cmd, \
 188                          unsigned long arg), (sock, cmd, arg)) \
 189 SOCKCALL_WRAP(name, listen, (struct socket *sock, int len), (sock, len)) \
 190 SOCKCALL_WRAP(name, shutdown, (struct socket *sock, int flags), (sock, flags)) \
 191 SOCKCALL_WRAP(name, setsockopt, (struct socket *sock, int level, int optname, \
 192                          char *optval, int optlen), (sock, level, optname, optval, optlen)) \
 193 SOCKCALL_WRAP(name, getsockopt, (struct socket *sock, int level, int optname, \
 194                          char *optval, int *optlen), (sock, level, optname, optval, optlen)) \
 195 SOCKCALL_WRAP(name, fcntl, (struct socket *sock, unsigned int cmd, \
 196                          unsigned long arg), (sock, cmd, arg)) \
 197 SOCKCALL_WRAP(name, sendmsg, (struct socket *sock, struct msghdr *m, int len, struct scm_cookie *scm), \
 198               (sock, m, len, scm)) \
 199 SOCKCALL_WRAP(name, recvmsg, (struct socket *sock, struct msghdr *m, int len, int flags, struct scm_cookie *scm), \
 200               (sock, m, len, flags, scm)) \
 201 SOCKCALL_WRAP(name, mmap, (struct file *file, struct socket *sock, struct vm_area_struct *vma), \
 202               (file, sock, vma)) \
 203               \
 204 static struct proto_ops name##_ops = {  \
 205         fam,                            \
 206                                         \
 207         __lock_##name##_release,        \
 208         __lock_##name##_bind,           \
 209         __lock_##name##_connect,        \
 210         __lock_##name##_socketpair,     \
 211         __lock_##name##_accept,         \
 212         __lock_##name##_getname,        \
 213         __lock_##name##_poll,           \
 214         __lock_##name##_ioctl,          \
 215         __lock_##name##_listen,         \
 216         __lock_##name##_shutdown,       \
 217         __lock_##name##_setsockopt,     \
 218         __lock_##name##_getsockopt,     \
 219         __lock_##name##_fcntl,          \
 220         __lock_##name##_sendmsg,        \
 221         __lock_##name##_recvmsg,        \
 222         __lock_##name##_mmap,           \
 223 };
 224 #endif
 225
 226
 227 #endif /* __KERNEL__ */
 228 #endif  /* _LINUX_NET_H */