net.h
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上传日期:2013-04-10
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- /*
- * NET An implementation of the SOCKET network access protocol.
- * This is the master header file for the Linux NET layer,
- * or, in plain English: the networking handling part of the
- * kernel.
- *
- * Version: @(#)net.h 1.0.3 05/25/93
- *
- * Authors: Orest Zborowski, <obz@Kodak.COM>
- * Ross Biro, <bir7@leland.Stanford.Edu>
- * Fred N. van Kempen, <waltje@uWalt.NL.Mugnet.ORG>
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License
- * as published by the Free Software Foundation; either version
- * 2 of the License, or (at your option) any later version.
- */
- #ifndef _LINUX_NET_H
- #define _LINUX_NET_H
- #include <linux/config.h>
- #include <linux/socket.h>
- #include <linux/wait.h>
- struct poll_table_struct;
- #define NPROTO 32 /* should be enough for now.. */
- #define SYS_SOCKET 1 /* sys_socket(2) */
- #define SYS_BIND 2 /* sys_bind(2) */
- #define SYS_CONNECT 3 /* sys_connect(2) */
- #define SYS_LISTEN 4 /* sys_listen(2) */
- #define SYS_ACCEPT 5 /* sys_accept(2) */
- #define SYS_GETSOCKNAME 6 /* sys_getsockname(2) */
- #define SYS_GETPEERNAME 7 /* sys_getpeername(2) */
- #define SYS_SOCKETPAIR 8 /* sys_socketpair(2) */
- #define SYS_SEND 9 /* sys_send(2) */
- #define SYS_RECV 10 /* sys_recv(2) */
- #define SYS_SENDTO 11 /* sys_sendto(2) */
- #define SYS_RECVFROM 12 /* sys_recvfrom(2) */
- #define SYS_SHUTDOWN 13 /* sys_shutdown(2) */
- #define SYS_SETSOCKOPT 14 /* sys_setsockopt(2) */
- #define SYS_GETSOCKOPT 15 /* sys_getsockopt(2) */
- #define SYS_SENDMSG 16 /* sys_sendmsg(2) */
- #define SYS_RECVMSG 17 /* sys_recvmsg(2) */
- typedef enum {
- SS_FREE = 0, /* not allocated */
- SS_UNCONNECTED, /* unconnected to any socket */
- SS_CONNECTING, /* in process of connecting */
- SS_CONNECTED, /* connected to socket */
- SS_DISCONNECTING /* in process of disconnecting */
- } socket_state;
- #define __SO_ACCEPTCON (1<<16) /* performed a listen */
- #ifdef __KERNEL__
- #define SOCK_ASYNC_NOSPACE 0
- #define SOCK_ASYNC_WAITDATA 1
- #define SOCK_NOSPACE 2
- struct socket
- {
- socket_state state;
- unsigned long flags;
- struct proto_ops *ops;
- struct inode *inode;
- struct fasync_struct *fasync_list; /* Asynchronous wake up list */
- struct file *file; /* File back pointer for gc */
- struct sock *sk;
- wait_queue_head_t wait;
- short type;
- unsigned char passcred;
- };
- #define SOCK_INODE(S) ((S)->inode)
- struct scm_cookie;
- struct vm_area_struct;
- struct page;
- struct proto_ops {
- int family;
- int (*release) (struct socket *sock);
- int (*bind) (struct socket *sock, struct sockaddr *umyaddr,
- int sockaddr_len);
- int (*connect) (struct socket *sock, struct sockaddr *uservaddr,
- int sockaddr_len, int flags);
- int (*socketpair) (struct socket *sock1, struct socket *sock2);
- int (*accept) (struct socket *sock, struct socket *newsock,
- int flags);
- int (*getname) (struct socket *sock, struct sockaddr *uaddr,
- int *usockaddr_len, int peer);
- unsigned int (*poll) (struct file *file, struct socket *sock, struct poll_table_struct *wait);
- int (*ioctl) (struct socket *sock, unsigned int cmd,
- unsigned long arg);
- int (*listen) (struct socket *sock, int len);
- int (*shutdown) (struct socket *sock, int flags);
- int (*setsockopt) (struct socket *sock, int level, int optname,
- char *optval, int optlen);
- int (*getsockopt) (struct socket *sock, int level, int optname,
- char *optval, int *optlen);
- int (*sendmsg) (struct socket *sock, struct msghdr *m, int total_len, struct scm_cookie *scm);
- int (*recvmsg) (struct socket *sock, struct msghdr *m, int total_len, int flags, struct scm_cookie *scm);
- int (*mmap) (struct file *file, struct socket *sock, struct vm_area_struct * vma);
- ssize_t (*sendpage) (struct socket *sock, struct page *page, int offset, size_t size, int flags);
- };
- struct net_proto_family
- {
- int family;
- int (*create)(struct socket *sock, int protocol);
- /* These are counters for the number of different methods of
- each we support */
- short authentication;
- short encryption;
- short encrypt_net;
- };
- struct net_proto
- {
- const char *name; /* Protocol name */
- void (*init_func)(struct net_proto *); /* Bootstrap */
- };
- extern int sock_wake_async(struct socket *sk, int how, int band);
- extern int sock_register(struct net_proto_family *fam);
- extern int sock_unregister(int family);
- extern struct socket *sock_alloc(void);
- extern int sock_create(int family, int type, int proto, struct socket **);
- extern void sock_release(struct socket *);
- extern int sock_sendmsg(struct socket *, struct msghdr *m, int len);
- extern int sock_recvmsg(struct socket *, struct msghdr *m, int len, int flags);
- extern int sock_readv_writev(int type, struct inode * inode, struct file * file,
- const struct iovec * iov, long count, long size);
- extern int net_ratelimit(void);
- extern unsigned long net_random(void);
- extern void net_srandom(unsigned long);
- #ifndef CONFIG_SMP
- #define SOCKOPS_WRAPPED(name) name
- #define SOCKOPS_WRAP(name, fam)
- #else
- #define SOCKOPS_WRAPPED(name) __unlocked_##name
- #define SOCKCALL_WRAP(name, call, parms, args)
- static int __lock_##name##_##call parms
- {
- int ret;
- lock_kernel();
- ret = __unlocked_##name##_ops.call args ;
- unlock_kernel();
- return ret;
- }
- #define SOCKCALL_UWRAP(name, call, parms, args)
- static unsigned int __lock_##name##_##call parms
- {
- int ret;
- lock_kernel();
- ret = __unlocked_##name##_ops.call args ;
- unlock_kernel();
- return ret;
- }
- #define SOCKOPS_WRAP(name, fam)
- SOCKCALL_WRAP(name, release, (struct socket *sock), (sock))
- SOCKCALL_WRAP(name, bind, (struct socket *sock, struct sockaddr *uaddr, int addr_len),
- (sock, uaddr, addr_len))
- SOCKCALL_WRAP(name, connect, (struct socket *sock, struct sockaddr * uaddr,
- int addr_len, int flags),
- (sock, uaddr, addr_len, flags))
- SOCKCALL_WRAP(name, socketpair, (struct socket *sock1, struct socket *sock2),
- (sock1, sock2))
- SOCKCALL_WRAP(name, accept, (struct socket *sock, struct socket *newsock,
- int flags), (sock, newsock, flags))
- SOCKCALL_WRAP(name, getname, (struct socket *sock, struct sockaddr *uaddr,
- int *addr_len, int peer), (sock, uaddr, addr_len, peer))
- SOCKCALL_UWRAP(name, poll, (struct file *file, struct socket *sock, struct poll_table_struct *wait),
- (file, sock, wait))
- SOCKCALL_WRAP(name, ioctl, (struct socket *sock, unsigned int cmd,
- unsigned long arg), (sock, cmd, arg))
- SOCKCALL_WRAP(name, listen, (struct socket *sock, int len), (sock, len))
- SOCKCALL_WRAP(name, shutdown, (struct socket *sock, int flags), (sock, flags))
- SOCKCALL_WRAP(name, setsockopt, (struct socket *sock, int level, int optname,
- char *optval, int optlen), (sock, level, optname, optval, optlen))
- SOCKCALL_WRAP(name, getsockopt, (struct socket *sock, int level, int optname,
- char *optval, int *optlen), (sock, level, optname, optval, optlen))
- SOCKCALL_WRAP(name, sendmsg, (struct socket *sock, struct msghdr *m, int len, struct scm_cookie *scm),
- (sock, m, len, scm))
- SOCKCALL_WRAP(name, recvmsg, (struct socket *sock, struct msghdr *m, int len, int flags, struct scm_cookie *scm),
- (sock, m, len, flags, scm))
- SOCKCALL_WRAP(name, mmap, (struct file *file, struct socket *sock, struct vm_area_struct *vma),
- (file, sock, vma))
-
- static struct proto_ops name##_ops = {
- family: fam,
-
- release: __lock_##name##_release,
- bind: __lock_##name##_bind,
- connect: __lock_##name##_connect,
- socketpair: __lock_##name##_socketpair,
- accept: __lock_##name##_accept,
- getname: __lock_##name##_getname,
- poll: __lock_##name##_poll,
- ioctl: __lock_##name##_ioctl,
- listen: __lock_##name##_listen,
- shutdown: __lock_##name##_shutdown,
- setsockopt: __lock_##name##_setsockopt,
- getsockopt: __lock_##name##_getsockopt,
- sendmsg: __lock_##name##_sendmsg,
- recvmsg: __lock_##name##_recvmsg,
- mmap: __lock_##name##_mmap,
- };
- #endif
- #endif /* __KERNEL__ */
- #endif /* _LINUX_NET_H */