366 lines
13 KiB
C
366 lines
13 KiB
C
/*
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* NET An implementation of the SOCKET network access protocol.
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* This is the master header file for the Linux NET layer,
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* or, in plain English: the networking handling part of the
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* kernel.
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*
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* Version: @(#)net.h 1.0.3 05/25/93
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*
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* Authors: Orest Zborowski, <obz@Kodak.COM>
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* Ross Biro
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* Fred N. van Kempen, <waltje@uWalt.NL.Mugnet.ORG>
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version
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* 2 of the License, or (at your option) any later version.
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*/
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#ifndef _LINUX_NET_H
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#define _LINUX_NET_H
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#include <linux/socket.h>
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#include <asm/socket.h>
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#define NPROTO AF_MAX
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#define SYS_SOCKET 1 /* sys_socket(2) */
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#define SYS_BIND 2 /* sys_bind(2) */
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#define SYS_CONNECT 3 /* sys_connect(2) */
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#define SYS_LISTEN 4 /* sys_listen(2) */
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#define SYS_ACCEPT 5 /* sys_accept(2) */
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#define SYS_GETSOCKNAME 6 /* sys_getsockname(2) */
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#define SYS_GETPEERNAME 7 /* sys_getpeername(2) */
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#define SYS_SOCKETPAIR 8 /* sys_socketpair(2) */
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#define SYS_SEND 9 /* sys_send(2) */
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#define SYS_RECV 10 /* sys_recv(2) */
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#define SYS_SENDTO 11 /* sys_sendto(2) */
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#define SYS_RECVFROM 12 /* sys_recvfrom(2) */
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#define SYS_SHUTDOWN 13 /* sys_shutdown(2) */
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#define SYS_SETSOCKOPT 14 /* sys_setsockopt(2) */
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#define SYS_GETSOCKOPT 15 /* sys_getsockopt(2) */
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#define SYS_SENDMSG 16 /* sys_sendmsg(2) */
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#define SYS_RECVMSG 17 /* sys_recvmsg(2) */
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#define SYS_ACCEPT4 18 /* sys_accept4(2) */
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typedef enum {
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SS_FREE = 0, /* not allocated */
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SS_UNCONNECTED, /* unconnected to any socket */
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SS_CONNECTING, /* in process of connecting */
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SS_CONNECTED, /* connected to socket */
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SS_DISCONNECTING /* in process of disconnecting */
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} socket_state;
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#define __SO_ACCEPTCON (1 << 16) /* performed a listen */
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#ifdef __KERNEL__
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#include <linux/stringify.h>
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#include <linux/random.h>
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#include <linux/wait.h>
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#include <linux/fcntl.h> /* For O_CLOEXEC and O_NONBLOCK */
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#include <linux/kmemcheck.h>
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struct poll_table_struct;
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struct pipe_inode_info;
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struct inode;
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struct net;
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#define SOCK_ASYNC_NOSPACE 0
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#define SOCK_ASYNC_WAITDATA 1
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#define SOCK_NOSPACE 2
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#define SOCK_PASSCRED 3
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#define SOCK_PASSSEC 4
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#ifndef ARCH_HAS_SOCKET_TYPES
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/**
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* enum sock_type - Socket types
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* @SOCK_STREAM: stream (connection) socket
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* @SOCK_DGRAM: datagram (conn.less) socket
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* @SOCK_RAW: raw socket
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* @SOCK_RDM: reliably-delivered message
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* @SOCK_SEQPACKET: sequential packet socket
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* @SOCK_DCCP: Datagram Congestion Control Protocol socket
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* @SOCK_PACKET: linux specific way of getting packets at the dev level.
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* For writing rarp and other similar things on the user level.
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*
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* When adding some new socket type please
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* grep ARCH_HAS_SOCKET_TYPE include/asm-* /socket.h, at least MIPS
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* overrides this enum for binary compat reasons.
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*/
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enum sock_type {
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SOCK_STREAM = 1,
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SOCK_DGRAM = 2,
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SOCK_RAW = 3,
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SOCK_RDM = 4,
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SOCK_SEQPACKET = 5,
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SOCK_DCCP = 6,
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SOCK_PACKET = 10,
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};
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#define SOCK_MAX (SOCK_PACKET + 1)
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/* Mask which covers at least up to SOCK_MASK-1. The
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* remaining bits are used as flags. */
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#define SOCK_TYPE_MASK 0xf
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/* Flags for socket, socketpair, accept4 */
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#define SOCK_CLOEXEC O_CLOEXEC
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#ifndef SOCK_NONBLOCK
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#define SOCK_NONBLOCK O_NONBLOCK
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#endif
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#endif /* ARCH_HAS_SOCKET_TYPES */
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enum sock_shutdown_cmd {
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SHUT_RD = 0,
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SHUT_WR = 1,
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SHUT_RDWR = 2,
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};
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/**
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* struct socket - general BSD socket
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* @state: socket state (%SS_CONNECTED, etc)
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* @type: socket type (%SOCK_STREAM, etc)
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* @flags: socket flags (%SOCK_ASYNC_NOSPACE, etc)
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* @ops: protocol specific socket operations
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* @fasync_list: Asynchronous wake up list
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* @file: File back pointer for gc
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* @sk: internal networking protocol agnostic socket representation
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* @wait: wait queue for several uses
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*/
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struct socket {
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socket_state state;
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kmemcheck_bitfield_begin(type);
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short type;
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kmemcheck_bitfield_end(type);
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unsigned long flags;
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/*
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* Please keep fasync_list & wait fields in the same cache line
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*/
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struct fasync_struct *fasync_list;
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wait_queue_head_t wait;
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struct file *file;
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struct sock *sk;
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const struct proto_ops *ops;
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};
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struct vm_area_struct;
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struct page;
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struct kiocb;
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struct sockaddr;
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struct msghdr;
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struct module;
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struct proto_ops {
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int family;
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struct module *owner;
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int (*release) (struct socket *sock);
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int (*bind) (struct socket *sock,
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struct sockaddr *myaddr,
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int sockaddr_len);
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int (*connect) (struct socket *sock,
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struct sockaddr *vaddr,
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int sockaddr_len, int flags);
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int (*socketpair)(struct socket *sock1,
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struct socket *sock2);
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int (*accept) (struct socket *sock,
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struct socket *newsock, int flags);
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int (*getname) (struct socket *sock,
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struct sockaddr *addr,
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int *sockaddr_len, int peer);
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unsigned int (*poll) (struct file *file, struct socket *sock,
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struct poll_table_struct *wait);
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int (*ioctl) (struct socket *sock, unsigned int cmd,
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unsigned long arg);
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int (*compat_ioctl) (struct socket *sock, unsigned int cmd,
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unsigned long arg);
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int (*listen) (struct socket *sock, int len);
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int (*shutdown) (struct socket *sock, int flags);
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int (*setsockopt)(struct socket *sock, int level,
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int optname, char __user *optval, int optlen);
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int (*getsockopt)(struct socket *sock, int level,
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int optname, char __user *optval, int __user *optlen);
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int (*compat_setsockopt)(struct socket *sock, int level,
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int optname, char __user *optval, int optlen);
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int (*compat_getsockopt)(struct socket *sock, int level,
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int optname, char __user *optval, int __user *optlen);
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int (*sendmsg) (struct kiocb *iocb, struct socket *sock,
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struct msghdr *m, size_t total_len);
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int (*recvmsg) (struct kiocb *iocb, struct socket *sock,
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struct msghdr *m, size_t total_len,
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int flags);
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int (*mmap) (struct file *file, struct socket *sock,
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struct vm_area_struct * vma);
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ssize_t (*sendpage) (struct socket *sock, struct page *page,
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int offset, size_t size, int flags);
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ssize_t (*splice_read)(struct socket *sock, loff_t *ppos,
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struct pipe_inode_info *pipe, size_t len, unsigned int flags);
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};
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struct net_proto_family {
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int family;
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int (*create)(struct net *net, struct socket *sock, int protocol);
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struct module *owner;
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};
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struct iovec;
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struct kvec;
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enum {
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SOCK_WAKE_IO,
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SOCK_WAKE_WAITD,
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SOCK_WAKE_SPACE,
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SOCK_WAKE_URG,
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};
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extern int sock_wake_async(struct socket *sk, int how, int band);
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extern int sock_register(const struct net_proto_family *fam);
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extern void sock_unregister(int family);
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extern int sock_create(int family, int type, int proto,
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struct socket **res);
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extern int sock_create_kern(int family, int type, int proto,
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struct socket **res);
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extern int sock_create_lite(int family, int type, int proto,
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struct socket **res);
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extern void sock_release(struct socket *sock);
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extern int sock_sendmsg(struct socket *sock, struct msghdr *msg,
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size_t len);
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extern int sock_recvmsg(struct socket *sock, struct msghdr *msg,
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size_t size, int flags);
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extern int sock_map_fd(struct socket *sock, int flags);
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extern struct socket *sockfd_lookup(int fd, int *err);
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#define sockfd_put(sock) fput(sock->file)
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extern int net_ratelimit(void);
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#define net_random() random32()
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#define net_srandom(seed) srandom32((__force u32)seed)
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extern int kernel_sendmsg(struct socket *sock, struct msghdr *msg,
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struct kvec *vec, size_t num, size_t len);
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extern int kernel_recvmsg(struct socket *sock, struct msghdr *msg,
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struct kvec *vec, size_t num,
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size_t len, int flags);
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extern int kernel_bind(struct socket *sock, struct sockaddr *addr,
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int addrlen);
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extern int kernel_listen(struct socket *sock, int backlog);
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extern int kernel_accept(struct socket *sock, struct socket **newsock,
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int flags);
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extern int kernel_connect(struct socket *sock, struct sockaddr *addr,
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int addrlen, int flags);
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extern int kernel_getsockname(struct socket *sock, struct sockaddr *addr,
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int *addrlen);
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extern int kernel_getpeername(struct socket *sock, struct sockaddr *addr,
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int *addrlen);
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extern int kernel_getsockopt(struct socket *sock, int level, int optname,
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char *optval, int *optlen);
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extern int kernel_setsockopt(struct socket *sock, int level, int optname,
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char *optval, int optlen);
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extern int kernel_sendpage(struct socket *sock, struct page *page, int offset,
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size_t size, int flags);
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extern int kernel_sock_ioctl(struct socket *sock, int cmd, unsigned long arg);
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extern int kernel_sock_shutdown(struct socket *sock,
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enum sock_shutdown_cmd how);
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#ifndef CONFIG_SMP
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#define SOCKOPS_WRAPPED(name) name
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#define SOCKOPS_WRAP(name, fam)
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#else
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#define SOCKOPS_WRAPPED(name) __unlocked_##name
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#define SOCKCALL_WRAP(name, call, parms, args) \
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static int __lock_##name##_##call parms \
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{ \
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int ret; \
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lock_kernel(); \
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ret = __unlocked_##name##_ops.call args ;\
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unlock_kernel(); \
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return ret; \
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}
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#define SOCKCALL_UWRAP(name, call, parms, args) \
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static unsigned int __lock_##name##_##call parms \
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{ \
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int ret; \
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lock_kernel(); \
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ret = __unlocked_##name##_ops.call args ;\
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unlock_kernel(); \
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return ret; \
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}
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#define SOCKOPS_WRAP(name, fam) \
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SOCKCALL_WRAP(name, release, (struct socket *sock), (sock)) \
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SOCKCALL_WRAP(name, bind, (struct socket *sock, struct sockaddr *uaddr, int addr_len), \
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(sock, uaddr, addr_len)) \
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SOCKCALL_WRAP(name, connect, (struct socket *sock, struct sockaddr * uaddr, \
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int addr_len, int flags), \
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(sock, uaddr, addr_len, flags)) \
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SOCKCALL_WRAP(name, socketpair, (struct socket *sock1, struct socket *sock2), \
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(sock1, sock2)) \
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SOCKCALL_WRAP(name, accept, (struct socket *sock, struct socket *newsock, \
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int flags), (sock, newsock, flags)) \
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SOCKCALL_WRAP(name, getname, (struct socket *sock, struct sockaddr *uaddr, \
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int *addr_len, int peer), (sock, uaddr, addr_len, peer)) \
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SOCKCALL_UWRAP(name, poll, (struct file *file, struct socket *sock, struct poll_table_struct *wait), \
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(file, sock, wait)) \
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SOCKCALL_WRAP(name, ioctl, (struct socket *sock, unsigned int cmd, \
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unsigned long arg), (sock, cmd, arg)) \
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SOCKCALL_WRAP(name, compat_ioctl, (struct socket *sock, unsigned int cmd, \
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unsigned long arg), (sock, cmd, arg)) \
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SOCKCALL_WRAP(name, listen, (struct socket *sock, int len), (sock, len)) \
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SOCKCALL_WRAP(name, shutdown, (struct socket *sock, int flags), (sock, flags)) \
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SOCKCALL_WRAP(name, setsockopt, (struct socket *sock, int level, int optname, \
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char __user *optval, int optlen), (sock, level, optname, optval, optlen)) \
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SOCKCALL_WRAP(name, getsockopt, (struct socket *sock, int level, int optname, \
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char __user *optval, int __user *optlen), (sock, level, optname, optval, optlen)) \
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SOCKCALL_WRAP(name, sendmsg, (struct kiocb *iocb, struct socket *sock, struct msghdr *m, size_t len), \
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(iocb, sock, m, len)) \
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SOCKCALL_WRAP(name, recvmsg, (struct kiocb *iocb, struct socket *sock, struct msghdr *m, size_t len, int flags), \
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(iocb, sock, m, len, flags)) \
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SOCKCALL_WRAP(name, mmap, (struct file *file, struct socket *sock, struct vm_area_struct *vma), \
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(file, sock, vma)) \
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\
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static const struct proto_ops name##_ops = { \
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.family = fam, \
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.owner = THIS_MODULE, \
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.release = __lock_##name##_release, \
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.bind = __lock_##name##_bind, \
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.connect = __lock_##name##_connect, \
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.socketpair = __lock_##name##_socketpair, \
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.accept = __lock_##name##_accept, \
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.getname = __lock_##name##_getname, \
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.poll = __lock_##name##_poll, \
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.ioctl = __lock_##name##_ioctl, \
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.compat_ioctl = __lock_##name##_compat_ioctl, \
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.listen = __lock_##name##_listen, \
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.shutdown = __lock_##name##_shutdown, \
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.setsockopt = __lock_##name##_setsockopt, \
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.getsockopt = __lock_##name##_getsockopt, \
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.sendmsg = __lock_##name##_sendmsg, \
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.recvmsg = __lock_##name##_recvmsg, \
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.mmap = __lock_##name##_mmap, \
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};
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#endif
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#define MODULE_ALIAS_NETPROTO(proto) \
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MODULE_ALIAS("net-pf-" __stringify(proto))
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#define MODULE_ALIAS_NET_PF_PROTO(pf, proto) \
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MODULE_ALIAS("net-pf-" __stringify(pf) "-proto-" __stringify(proto))
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#define MODULE_ALIAS_NET_PF_PROTO_TYPE(pf, proto, type) \
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MODULE_ALIAS("net-pf-" __stringify(pf) "-proto-" __stringify(proto) \
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"-type-" __stringify(type))
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#ifdef CONFIG_SYSCTL
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#include <linux/sysctl.h>
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extern struct ratelimit_state net_ratelimit_state;
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#endif
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#endif /* __KERNEL__ */
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#endif /* _LINUX_NET_H */
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