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 
  22 #include <linux/wait.h>
  23 #include <linux/socket.h>
  24 
  25 #define NPROTO          16              /* should be enough for now..   */
  26 
  27 
  28 #define SYS_SOCKET      1               /* sys_socket(2)                */
  29 #define SYS_BIND        2               /* sys_bind(2)                  */
  30 #define SYS_CONNECT     3               /* sys_connect(2)               */
  31 #define SYS_LISTEN      4               /* sys_listen(2)                */
  32 #define SYS_ACCEPT      5               /* sys_accept(2)                */
  33 #define SYS_GETSOCKNAME 6               /* sys_getsockname(2)           */
  34 #define SYS_GETPEERNAME 7               /* sys_getpeername(2)           */
  35 #define SYS_SOCKETPAIR  8               /* sys_socketpair(2)            */
  36 #define SYS_SEND        9               /* sys_send(2)                  */
  37 #define SYS_RECV        10              /* sys_recv(2)                  */
  38 #define SYS_SENDTO      11              /* sys_sendto(2)                */
  39 #define SYS_RECVFROM    12              /* sys_recvfrom(2)              */
  40 #define SYS_SHUTDOWN    13              /* sys_shutdown(2)              */
  41 #define SYS_SETSOCKOPT  14              /* sys_setsockopt(2)            */
  42 #define SYS_GETSOCKOPT  15              /* sys_getsockopt(2)            */
  43 #define SYS_SENDMSG     16              /* sys_sendmsg(2)               */
  44 #define SYS_RECVMSG     17              /* sys_recvmsg(2)               */
  45 
  46 
  47 typedef enum {
  48   SS_FREE = 0,                          /* not allocated                */
  49   SS_UNCONNECTED,                       /* unconnected to any socket    */
  50   SS_CONNECTING,                        /* in process of connecting     */
  51   SS_CONNECTED,                         /* connected to socket          */
  52   SS_DISCONNECTING                      /* in process of disconnecting  */
  53 } socket_state;
  54 
  55 #define SO_ACCEPTCON    (1<<16)         /* performed a listen           */
  56 #define SO_WAITDATA     (1<<17)         /* wait data to read            */
  57 #define SO_NOSPACE      (1<<18)         /* no space to write            */
  58 
  59 #ifdef __KERNEL__
  60 /*
  61  * Internal representation of a socket. not all the fields are used by
  62  * all configurations:
  63  *
  64  *              server                  client
  65  * conn         client connected to     server connected to
  66  * iconn        list of clients         -unused-
  67  *               awaiting connections
  68  * wait         sleep for clients,      sleep for connection,
  69  *              sleep for i/o           sleep for i/o
  70  */
  71 struct socket {
  72   short                 type;           /* SOCK_STREAM, ...             */
  73   socket_state          state;
  74   long                  flags;
  75   struct proto_ops      *ops;           /* protocols do most everything */
  76   void                  *data;          /* protocol data                */
  77   struct socket         *conn;          /* server socket connected to   */
  78   struct socket         *iconn;         /* incomplete client conn.s     */
  79   struct socket         *next;
  80   struct wait_queue     **wait;         /* ptr to place to wait on      */
  81   struct inode          *inode;
  82   struct fasync_struct  *fasync_list;   /* Asynchronous wake up list    */
  83   struct file           *file;          /* File back pointer for gc     */
  84 };
  85 
  86 #define SOCK_INODE(S)   ((S)->inode)
  87 
  88 struct proto_ops {
  89   int   family;
  90 
  91   int   (*create)       (struct socket *sock, int protocol);
  92   int   (*dup)          (struct socket *newsock, struct socket *oldsock);
  93   int   (*release)      (struct socket *sock, struct socket *peer);
  94   int   (*bind)         (struct socket *sock, struct sockaddr *umyaddr,
  95                          int sockaddr_len);
  96   int   (*connect)      (struct socket *sock, struct sockaddr *uservaddr,
  97                          int sockaddr_len, int flags);
  98   int   (*socketpair)   (struct socket *sock1, struct socket *sock2);
  99   int   (*accept)       (struct socket *sock, struct socket *newsock,
 100                          int flags);
 101   int   (*getname)      (struct socket *sock, struct sockaddr *uaddr,
 102                          int *usockaddr_len, int peer);
 103   int   (*select)       (struct socket *sock, int sel_type,
 104                          select_table *wait);
 105   int   (*ioctl)        (struct socket *sock, unsigned int cmd,
 106                          unsigned long arg);
 107   int   (*listen)       (struct socket *sock, int len);
 108   int   (*shutdown)     (struct socket *sock, int flags);
 109   int   (*setsockopt)   (struct socket *sock, int level, int optname,
 110                          char *optval, int optlen);
 111   int   (*getsockopt)   (struct socket *sock, int level, int optname,
 112                          char *optval, int *optlen);
 113   int   (*fcntl)        (struct socket *sock, unsigned int cmd,
 114                          unsigned long arg);    
 115   int   (*sendmsg)      (struct socket *sock, struct msghdr *m, int total_len, int nonblock, int flags);
 116   int   (*recvmsg)      (struct socket *sock, struct msghdr *m, int total_len, int nonblock, int flags, int *addr_len);
 117 };
 118 
 119 struct net_proto {
 120         const char *name;               /* Protocol name */
 121         void (*init_func)(struct net_proto *);  /* Bootstrap */
 122 };
 123 
 124 extern int      sock_wake_async(struct socket *sock, int how);
 125 extern int      sock_register(int family, struct proto_ops *ops);
 126 extern int      sock_unregister(int family);
 127 extern struct socket *sock_alloc(void);
 128 extern void     sock_release(struct socket *sock);
 129 #endif /* __KERNEL__ */
 130 #endif  /* _LINUX_NET_H */
/* */
root/include/linux/net.h

INCLUDED FROM
