include/linux/net.h

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 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
 26 #define NSOCKETS 2000/* Dynamic, this is MAX LIMIT */
 27 #define NSOCKETS_UNIX 128/* unix domain static limit */
 28 #define NPROTO 16/* should be enough for now.. */
 29
 30
 31 #define SYS_SOCKET 1/* sys_socket(2) */
 32 #define SYS_BIND 2/* sys_bind(2) */
 33 #define SYS_CONNECT 3/* sys_connect(2) */
 34 #define SYS_LISTEN 4/* sys_listen(2) */
 35 #define SYS_ACCEPT 5/* sys_accept(2) */
 36 #define SYS_GETSOCKNAME 6/* sys_getsockname(2) */
 37 #define SYS_GETPEERNAME 7/* sys_getpeername(2) */
 38 #define SYS_SOCKETPAIR 8/* sys_socketpair(2) */
 39 #define SYS_SEND 9/* sys_send(2) */
 40 #define SYS_RECV 10/* sys_recv(2) */
 41 #define SYS_SENDTO 11/* sys_sendto(2) */
 42 #define SYS_RECVFROM 12/* sys_recvfrom(2) */
 43 #define SYS_SHUTDOWN 13/* sys_shutdown(2) */
 44 #define SYS_SETSOCKOPT 14/* sys_setsockopt(2) */
 45 #define SYS_GETSOCKOPT 15/* sys_getsockopt(2) */
 46
 47
 48 typedefenum{
 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  * Internal representation of a socket. not all the fields are used by
 63  * all configurations:
 64  *
 65  * server client
 66  * conn client connected to server connected to
 67  * iconn list of clients -unused-
 68  * awaiting connections
 69  * wait sleep for clients, sleep for connection,
 70  * sleep for i/o sleep for i/o
 71  */
 72 struct socket {
 73 short type;/* SOCK_STREAM, ... */
 74  socket_state state;
 75 long flags;
 76 struct proto_ops *ops;/* protocols do most everything */
 77 void*data;/* protocol data */
 78 struct socket *conn;/* server socket connected to */
 79 struct socket *iconn;/* incomplete client conn.s */
 80 struct socket *next;
 81 struct wait_queue **wait;/* ptr to place to wait on */
 82 struct inode *inode;
 83 struct fasync_struct *fasync_list;/* Asynchronous wake up list */
 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(*read) (struct socket *sock,char*ubuf,int size,
 104 int nonblock);
 105 int(*write) (struct socket *sock,const char*ubuf,int size,
 106 int nonblock);
 107 int(*select) (struct socket *sock,int sel_type,
 108  select_table *wait);
 109 int(*ioctl) (struct socket *sock,unsigned int cmd,
 110 unsigned long arg);
 111 int(*listen) (struct socket *sock,int len);
 112 int(*send) (struct socket *sock,const void*buff,int len,int nonblock,
 113 unsigned flags);
 114 int(*recv) (struct socket *sock,void*buff,int len,int nonblock,
 115 unsigned flags);
 116 int(*sendto) (struct socket *sock,const void*buff,int len,int nonblock,
 117 unsigned flags,struct sockaddr *,int addr_len);
 118 int(*recvfrom) (struct socket *sock,void*buff,int len,int nonblock,
 119 unsigned flags,struct sockaddr *,int*addr_len);
 120 int(*shutdown) (struct socket *sock,int flags);
 121 int(*setsockopt) (struct socket *sock,int level,int optname,
 122 char*optval,int optlen);
 123 int(*getsockopt) (struct socket *sock,int level,int optname,
 124 char*optval,int*optlen);
 125 int(*fcntl) (struct socket *sock,unsigned int cmd,
 126 unsigned long arg);
 127 };
 128
 129 struct net_proto {
 130 const char*name;/* Protocol name */
 131 void(*init_func)(struct net_proto *);/* Bootstrap */
 132 };
 133
 134 externintsock_awaitconn(struct socket *mysock,struct socket *servsock,int flags);
 135 externintsock_wake_async(struct socket *sock,int how);
 136 externintsock_register(int family,struct proto_ops *ops);
 137 externintsock_unregister(int family);
 138 externstruct socket *sock_alloc(void);
 139 externvoidsock_release(struct socket *sock);
 140 #endif/* __KERNEL__ */
 141 #endif/* _LINUX_NET_H */