include/linux/net.h - kernel/msm - Gitiles

 /*
  * 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/socket.h>
 #include <asm/socket.h>

 #define NPROTO		AF_MAX

 #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)		*/
 #define SYS_ACCEPT4	18		/* sys_accept4(2)		*/
 #define SYS_RECVMMSG	19		/* sys_recvmmsg(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__
 #include <linux/stringify.h>
 #include <linux/random.h>
 #include <linux/wait.h>
 #include <linux/fcntl.h>	/* For O_CLOEXEC and O_NONBLOCK */
 #include <linux/kmemcheck.h>

 struct poll_table_struct;
 struct pipe_inode_info;
 struct inode;
 struct net;

 #define SOCK_ASYNC_NOSPACE	0
 #define SOCK_ASYNC_WAITDATA	1
 #define SOCK_NOSPACE		2
 #define SOCK_PASSCRED		3
 #define SOCK_PASSSEC		4

 #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_DCCP: Datagram Congestion Control Protocol 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)
 /* Mask which covers at least up to SOCK_MASK-1.  The
  * remaining bits are used as flags. */
 #define SOCK_TYPE_MASK 0xf

 /* Flags for socket, socketpair, accept4 */
 #define SOCK_CLOEXEC	O_CLOEXEC
 #ifndef SOCK_NONBLOCK
 #define SOCK_NONBLOCK	O_NONBLOCK
 #endif

 #endif /* ARCH_HAS_SOCKET_TYPES */

 enum sock_shutdown_cmd {
 	SHUT_RD		= 0,
 	SHUT_WR		= 1,
 	SHUT_RDWR	= 2,
 };

 /**
  *  struct socket - general BSD socket
  *  @state: socket state (%SS_CONNECTED, etc)
  *  @type: socket type (%SOCK_STREAM, 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
  */
 struct socket {
 	socket_state		state;

 	kmemcheck_bitfield_begin(type);
 	short			type;
 	kmemcheck_bitfield_end(type);

 	unsigned long		flags;
 	/*
 	 * Please keep fasync_list & wait fields in the same cache line
 	 */
 	struct fasync_struct	*fasync_list;
 	wait_queue_head_t	wait;

 	struct file		*file;
 	struct sock		*sk;
 	const struct proto_ops	*ops;
 };

 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	 	(*compat_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, unsigned int optlen);
 	int		(*getsockopt)(struct socket *sock, int level,
 				      int optname, char __user *optval, int __user *optlen);
 	int		(*compat_setsockopt)(struct socket *sock, int level,
 				      int optname, char __user *optval, unsigned int optlen);
 	int		(*compat_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);
 	ssize_t 	(*splice_read)(struct socket *sock,  loff_t *ppos,
 				       struct pipe_inode_info *pipe, size_t len, unsigned int flags);
 };

 #define DECLARE_SOCKADDR(type, dst, src)	\
 	type dst = ({ __sockaddr_check_size(sizeof(*dst)); (type) src; })

 struct net_proto_family {
 	int		family;
 	int		(*create)(struct net *net, struct socket *sock,
 				  int protocol, int kern);
 	struct module	*owner;
 };

 struct iovec;
 struct kvec;

 enum {
 	SOCK_WAKE_IO,
 	SOCK_WAKE_WAITD,
 	SOCK_WAKE_SPACE,
 	SOCK_WAKE_URG,
 };

 extern int	     sock_wake_async(struct socket *sk, int how, int band);
 extern int	     sock_register(const struct net_proto_family *fam);
 extern void	     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, int flags);
 extern struct socket *sockfd_lookup(int fd, int *err);
 #define		     sockfd_put(sock) fput(sock->file)
 extern int	     net_ratelimit(void);

 #define net_random()		random32()
 #define net_srandom(seed)	srandom32((__force u32)seed)

 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);

 extern int kernel_bind(struct socket *sock, struct sockaddr *addr,
 		       int addrlen);
 extern int kernel_listen(struct socket *sock, int backlog);
 extern int kernel_accept(struct socket *sock, struct socket **newsock,
 			 int flags);
 extern int kernel_connect(struct socket *sock, struct sockaddr *addr,
 			  int addrlen, int flags);
 extern int kernel_getsockname(struct socket *sock, struct sockaddr *addr,
 			      int *addrlen);
 extern int kernel_getpeername(struct socket *sock, struct sockaddr *addr,
 			      int *addrlen);
 extern int kernel_getsockopt(struct socket *sock, int level, int optname,
 			     char *optval, int *optlen);
 extern int kernel_setsockopt(struct socket *sock, int level, int optname,
 			     char *optval, unsigned int optlen);
 extern int kernel_sendpage(struct socket *sock, struct page *page, int offset,
 			   size_t size, int flags);
 extern int kernel_sock_ioctl(struct socket *sock, int cmd, unsigned long arg);
 extern int kernel_sock_shutdown(struct socket *sock,
 				enum sock_shutdown_cmd how);

 #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))

 #define MODULE_ALIAS_NET_PF_PROTO_TYPE(pf, proto, type) \
 	MODULE_ALIAS("net-pf-" __stringify(pf) "-proto-" __stringify(proto) \
 		     "-type-" __stringify(type))

 #ifdef CONFIG_SYSCTL
 #include <linux/sysctl.h>
 extern struct ratelimit_state net_ratelimit_state;
 #endif

 #endif /* __KERNEL__ */
 #endif	/* _LINUX_NET_H */
	/*
	* 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/socket.h>
	#include <asm/socket.h>

	#define NPROTO AF_MAX

	#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) */
	#define SYS_ACCEPT4 18 /* sys_accept4(2) */
	#define SYS_RECVMMSG 19 /* sys_recvmmsg(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__
	#include <linux/stringify.h>
	#include <linux/random.h>
	#include <linux/wait.h>
	#include <linux/fcntl.h> /* For O_CLOEXEC and O_NONBLOCK */
	#include <linux/kmemcheck.h>

	struct poll_table_struct;
	struct pipe_inode_info;
	struct inode;
	struct net;

	#define SOCK_ASYNC_NOSPACE 0
	#define SOCK_ASYNC_WAITDATA 1
	#define SOCK_NOSPACE 2
	#define SOCK_PASSCRED 3
	#define SOCK_PASSSEC 4

	#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_DCCP: Datagram Congestion Control Protocol 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)
	/* Mask which covers at least up to SOCK_MASK-1. The
	* remaining bits are used as flags. */
	#define SOCK_TYPE_MASK 0xf

	/* Flags for socket, socketpair, accept4 */
	#define SOCK_CLOEXEC O_CLOEXEC
	#ifndef SOCK_NONBLOCK
	#define SOCK_NONBLOCK O_NONBLOCK
	#endif

	#endif /* ARCH_HAS_SOCKET_TYPES */

	enum sock_shutdown_cmd {
	SHUT_RD = 0,
	SHUT_WR = 1,
	SHUT_RDWR = 2,
	};

	/**
	* struct socket - general BSD socket
	* @state: socket state (%SS_CONNECTED, etc)
	* @type: socket type (%SOCK_STREAM, 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
	*/
	struct socket {
	socket_state state;

	kmemcheck_bitfield_begin(type);
	short type;
	kmemcheck_bitfield_end(type);

	unsigned long flags;
	/*
	* Please keep fasync_list & wait fields in the same cache line
	*/
	struct fasync_struct *fasync_list;
	wait_queue_head_t wait;

	struct file *file;
	struct sock *sk;
	const struct proto_ops *ops;
	};

	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 (compat_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, unsigned int optlen);
	int (getsockopt)(struct socket sock, int level,
	int optname, char __user optval, int __user optlen);
	int (compat_setsockopt)(struct socket sock, int level,
	int optname, char __user *optval, unsigned int optlen);
	int (compat_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);
	ssize_t (splice_read)(struct socket sock, loff_t *ppos,
	struct pipe_inode_info *pipe, size_t len, unsigned int flags);
	};

	#define DECLARE_SOCKADDR(type, dst, src) \
	type dst = ({ __sockaddr_check_size(sizeof(*dst)); (type) src; })

	struct net_proto_family {
	int family;
	int (create)(struct net net, struct socket *sock,
	int protocol, int kern);
	struct module *owner;
	};

	struct iovec;
	struct kvec;

	enum {
	SOCK_WAKE_IO,
	SOCK_WAKE_WAITD,
	SOCK_WAKE_SPACE,
	SOCK_WAKE_URG,
	};

	extern int sock_wake_async(struct socket *sk, int how, int band);
	extern int sock_register(const struct net_proto_family *fam);
	extern void 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, int flags);
	extern struct socket sockfd_lookup(int fd, int err);
	#define sockfd_put(sock) fput(sock->file)
	extern int net_ratelimit(void);

	#define net_random() random32()
	#define net_srandom(seed) srandom32((__force u32)seed)

	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);

	extern int kernel_bind(struct socket sock, struct sockaddr addr,
	int addrlen);
	extern int kernel_listen(struct socket *sock, int backlog);
	extern int kernel_accept(struct socket sock, struct socket *newsock,
	int flags);
	extern int kernel_connect(struct socket sock, struct sockaddr addr,
	int addrlen, int flags);
	extern int kernel_getsockname(struct socket sock, struct sockaddr addr,
	int *addrlen);
	extern int kernel_getpeername(struct socket sock, struct sockaddr addr,
	int *addrlen);
	extern int kernel_getsockopt(struct socket *sock, int level, int optname,
	char optval, int optlen);
	extern int kernel_setsockopt(struct socket *sock, int level, int optname,
	char *optval, unsigned int optlen);
	extern int kernel_sendpage(struct socket sock, struct page page, int offset,
	size_t size, int flags);
	extern int kernel_sock_ioctl(struct socket *sock, int cmd, unsigned long arg);
	extern int kernel_sock_shutdown(struct socket *sock,
	enum sock_shutdown_cmd how);

	#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))

	#define MODULE_ALIAS_NET_PF_PROTO_TYPE(pf, proto, type) \
	MODULE_ALIAS("net-pf-" __stringify(pf) "-proto-" __stringify(proto) \
	"-type-" __stringify(type))

	#ifdef CONFIG_SYSCTL
	#include <linux/sysctl.h>
	extern struct ratelimit_state net_ratelimit_state;
	#endif

	#endif /* __KERNEL__ */
	#endif /* _LINUX_NET_H */