Initial import

1 files changed, 299 insertions, 0 deletions

diff --git a/include/linux/net.h b/include/linux/net.h
new file mode 100644
index 000000000..738ea48be
--- /dev/null
+++ b/include/linux/net.h
@@ -0,0 +1,299 @@
+/*
+ * 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/stringify.h>
+#include <linux/random.h>
+#include <linux/wait.h>
+#include <linux/fcntl.h>	/* For O_CLOEXEC and O_NONBLOCK */
+#include <linux/kmemcheck.h>
+#include <linux/rcupdate.h>
+#include <linux/jump_label.h>
+#include <uapi/linux/net.h>
+
+struct poll_table_struct;
+struct pipe_inode_info;
+struct inode;
+struct file;
+struct net;
+
+#define SOCK_ASYNC_NOSPACE	0
+#define SOCK_ASYNC_WAITDATA	1
+#define SOCK_NOSPACE		2
+#define SOCK_PASSCRED		3
+#define SOCK_PASSSEC		4
+#define SOCK_EXTERNALLY_ALLOCATED 5
+
+#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,
+	SHUT_WR,
+	SHUT_RDWR,
+};
+
+struct socket_wq {
+	/* Note: wait MUST be first field of socket_wq */
+	wait_queue_head_t	wait;
+	struct fasync_struct	*fasync_list;
+	struct rcu_head		rcu;
+} ____cacheline_aligned_in_smp;
+
+/**
+ *  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
+ *  @file: File back pointer for gc
+ *  @sk: internal networking protocol agnostic socket representation
+ *  @wq: wait queue for several uses
+ */
+struct socket {
+	socket_state		state;
+
+	kmemcheck_bitfield_begin(type);
+	short			type;
+	kmemcheck_bitfield_end(type);
+
+	unsigned long		flags;
+
+	struct socket_wq __rcu	*wq;
+
+	struct file		*file;
+	struct sock		*sk;
+	const struct proto_ops	*ops;
+};
+
+struct vm_area_struct;
+struct page;
+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);
+#ifdef CONFIG_COMPAT
+	int	 	(*compat_ioctl) (struct socket *sock, unsigned int cmd,
+				      unsigned long arg);
+#endif
+	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);
+#ifdef CONFIG_COMPAT
+	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);
+#endif
+	int		(*sendmsg)   (struct socket *sock, struct msghdr *m,
+				      size_t total_len);
+	/* Notes for implementing recvmsg:
+	 * ===============================
+	 * msg->msg_namelen should get updated by the recvmsg handlers
+	 * iff msg_name != NULL. It is by default 0 to prevent
+	 * returning uninitialized memory to user space.  The recvfrom
+	 * handlers can assume that msg.msg_name is either NULL or has
+	 * a minimum size of sizeof(struct sockaddr_storage).
+	 */
+	int		(*recvmsg)   (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);
+	int		(*set_peek_off)(struct sock *sk, int val);
+};
+
+#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,
+};
+
+int sock_wake_async(struct socket *sk, int how, int band);
+int sock_register(const struct net_proto_family *fam);
+void sock_unregister(int family);
+int __sock_create(struct net *net, int family, int type, int proto,
+		  struct socket **res, int kern);
+int sock_create(int family, int type, int proto, struct socket **res);
+int sock_create_kern(int family, int type, int proto, struct socket **res);
+int sock_create_lite(int family, int type, int proto, struct socket **res);
+void sock_release(struct socket *sock);
+int sock_sendmsg(struct socket *sock, struct msghdr *msg);
+int sock_recvmsg(struct socket *sock, struct msghdr *msg, size_t size,
+		 int flags);
+struct file *sock_alloc_file(struct socket *sock, int flags, const char *dname);
+struct socket *sockfd_lookup(int fd, int *err);
+struct socket *sock_from_file(struct file *file, int *err);
+#define		     sockfd_put(sock) fput(sock->file)
+int net_ratelimit(void);
+
+#define net_ratelimited_function(function, ...)			\
+do {								\
+	if (net_ratelimit())					\
+		function(__VA_ARGS__);				\
+} while (0)
+
+#define net_emerg_ratelimited(fmt, ...)				\
+	net_ratelimited_function(pr_emerg, fmt, ##__VA_ARGS__)
+#define net_alert_ratelimited(fmt, ...)				\
+	net_ratelimited_function(pr_alert, fmt, ##__VA_ARGS__)
+#define net_crit_ratelimited(fmt, ...)				\
+	net_ratelimited_function(pr_crit, fmt, ##__VA_ARGS__)
+#define net_err_ratelimited(fmt, ...)				\
+	net_ratelimited_function(pr_err, fmt, ##__VA_ARGS__)
+#define net_notice_ratelimited(fmt, ...)			\
+	net_ratelimited_function(pr_notice, fmt, ##__VA_ARGS__)
+#define net_warn_ratelimited(fmt, ...)				\
+	net_ratelimited_function(pr_warn, fmt, ##__VA_ARGS__)
+#define net_info_ratelimited(fmt, ...)				\
+	net_ratelimited_function(pr_info, fmt, ##__VA_ARGS__)
+#define net_dbg_ratelimited(fmt, ...)				\
+	net_ratelimited_function(pr_debug, fmt, ##__VA_ARGS__)
+
+bool __net_get_random_once(void *buf, int nbytes, bool *done,
+			   struct static_key *done_key);
+
+#define net_get_random_once(buf, nbytes)				\
+	({								\
+		bool ___ret = false;					\
+		static bool ___done = false;				\
+		static struct static_key ___once_key =			\
+			STATIC_KEY_INIT_TRUE;				\
+		if (static_key_true(&___once_key))			\
+			___ret = __net_get_random_once(buf,		\
+						       nbytes,		\
+						       &___done,	\
+						       &___once_key);	\
+		___ret;							\
+	})
+
+int kernel_sendmsg(struct socket *sock, struct msghdr *msg, struct kvec *vec,
+		   size_t num, size_t len);
+int kernel_recvmsg(struct socket *sock, struct msghdr *msg, struct kvec *vec,
+		   size_t num, size_t len, int flags);
+
+int kernel_bind(struct socket *sock, struct sockaddr *addr, int addrlen);
+int kernel_listen(struct socket *sock, int backlog);
+int kernel_accept(struct socket *sock, struct socket **newsock, int flags);
+int kernel_connect(struct socket *sock, struct sockaddr *addr, int addrlen,
+		   int flags);
+int kernel_getsockname(struct socket *sock, struct sockaddr *addr,
+		       int *addrlen);
+int kernel_getpeername(struct socket *sock, struct sockaddr *addr,
+		       int *addrlen);
+int kernel_getsockopt(struct socket *sock, int level, int optname, char *optval,
+		      int *optlen);
+int kernel_setsockopt(struct socket *sock, int level, int optname, char *optval,
+		      unsigned int optlen);
+int kernel_sendpage(struct socket *sock, struct page *page, int offset,
+		    size_t size, int flags);
+int kernel_sock_ioctl(struct socket *sock, int cmd, unsigned long arg);
+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))
+
+#define MODULE_ALIAS_NET_PF_PROTO_NAME(pf, proto, name) \
+	MODULE_ALIAS("net-pf-" __stringify(pf) "-proto-" __stringify(proto) \
+		     name)
+#endif	/* _LINUX_NET_H */