net.h
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上传日期:2009-04-28
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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
- * 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/wait.h>
- #include <linux/stringify.h>
- #include <asm/socket.h>
- struct poll_table_struct;
- struct inode;
- #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
- #define SOCK_PASSCRED 3
- #ifndef ARCH_HAS_SOCKET_TYPES
- /**
- * enum sock_type - Socket types
- * @SOCK_STREAM: stream (connection) socket
- * @SOCK_DGRAM: datagram (conn.less) socket
- * @SOCK_RAW: raw socket
- * @SOCK_RDM: reliably-delivered message
- * @SOCK_SEQPACKET: sequential packet socket
- * @SOCK_PACKET: linux specific way of getting packets at the dev level.
- * For writing rarp and other similar things on the user level.
- *
- * When adding some new socket type please
- * grep ARCH_HAS_SOCKET_TYPE include/asm-* /socket.h, at least MIPS
- * overrides this enum for binary compat reasons.
- */
- enum sock_type {
- SOCK_STREAM = 1,
- SOCK_DGRAM = 2,
- SOCK_RAW = 3,
- SOCK_RDM = 4,
- SOCK_SEQPACKET = 5,
- SOCK_DCCP = 6,
- SOCK_PACKET = 10,
- };
- #define SOCK_MAX (SOCK_PACKET + 1)
- #endif /* ARCH_HAS_SOCKET_TYPES */
- /**
- * struct socket - general BSD socket
- * @state: socket state (%SS_CONNECTED, etc)
- * @flags: socket flags (%SOCK_ASYNC_NOSPACE, etc)
- * @ops: protocol specific socket operations
- * @fasync_list: Asynchronous wake up list
- * @file: File back pointer for gc
- * @sk: internal networking protocol agnostic socket representation
- * @wait: wait queue for several uses
- * @type: socket type (%SOCK_STREAM, etc)
- */
- struct socket {
- socket_state state;
- unsigned long flags;
- struct proto_ops *ops;
- struct fasync_struct *fasync_list;
- struct file *file;
- struct sock *sk;
- wait_queue_head_t wait;
- short type;
- };
- struct vm_area_struct;
- struct page;
- struct kiocb;
- struct sockaddr;
- struct msghdr;
- struct module;
- struct proto_ops {
- int family;
- struct module *owner;
- int (*release) (struct socket *sock);
- int (*bind) (struct socket *sock,
- struct sockaddr *myaddr,
- int sockaddr_len);
- int (*connect) (struct socket *sock,
- struct sockaddr *vaddr,
- 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 *addr,
- int *sockaddr_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 __user *optval, int optlen);
- int (*getsockopt)(struct socket *sock, int level,
- int optname, char __user *optval, int __user *optlen);
- int (*sendmsg) (struct kiocb *iocb, struct socket *sock,
- struct msghdr *m, size_t total_len);
- int (*recvmsg) (struct kiocb *iocb, struct socket *sock,
- struct msghdr *m, size_t total_len,
- int flags);
- 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 module *owner;
- };
- struct iovec;
- struct kvec;
- 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 int sock_create(int family, int type, int proto,
- struct socket **res);
- extern int sock_create_kern(int family, int type, int proto,
- struct socket **res);
- extern int sock_create_lite(int family, int type, int proto,
- struct socket **res);
- extern void sock_release(struct socket *sock);
- extern int sock_sendmsg(struct socket *sock, struct msghdr *msg,
- size_t len);
- extern int sock_recvmsg(struct socket *sock, struct msghdr *msg,
- size_t size, int flags);
- extern int sock_map_fd(struct socket *sock);
- extern struct socket *sockfd_lookup(int fd, int *err);
- #define sockfd_put(sock) fput(sock->file)
- extern int net_ratelimit(void);
- extern unsigned long net_random(void);
- extern void net_srandom(unsigned long);
- extern void net_random_init(void);
- extern int kernel_sendmsg(struct socket *sock, struct msghdr *msg,
- struct kvec *vec, size_t num, size_t len);
- extern int kernel_recvmsg(struct socket *sock, struct msghdr *msg,
- struct kvec *vec, size_t num,
- size_t len, int flags);
- #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 __user *optval, int optlen), (sock, level, optname, optval, optlen))
- SOCKCALL_WRAP(name, getsockopt, (struct socket *sock, int level, int optname,
- char __user *optval, int __user *optlen), (sock, level, optname, optval, optlen))
- SOCKCALL_WRAP(name, sendmsg, (struct kiocb *iocb, struct socket *sock, struct msghdr *m, size_t len),
- (iocb, sock, m, len))
- SOCKCALL_WRAP(name, recvmsg, (struct kiocb *iocb, struct socket *sock, struct msghdr *m, size_t len, int flags),
- (iocb, sock, m, len, flags))
- 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,
- .owner = THIS_MODULE,
- .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
- #define MODULE_ALIAS_NETPROTO(proto)
- MODULE_ALIAS("net-pf-" __stringify(proto))
- #define MODULE_ALIAS_NET_PF_PROTO(pf, proto)
- MODULE_ALIAS("net-pf-" __stringify(pf) "-proto-" __stringify(proto))
- #ifdef CONFIG_SYSCTL
- #include <linux/sysctl.h>
- extern ctl_table net_table[];
- extern int net_msg_cost;
- extern int net_msg_burst;
- #endif
- #endif /* __KERNEL__ */
- #endif /* _LINUX_NET_H */