Import of Linux/MIPS 1.3.0

1 files changed, 354 insertions, 0 deletions

diff --git a/include/net/sock.h b/include/net/sock.h
new file mode 100644
index 000000000..be7c84591
--- /dev/null
+++ b/include/net/sock.h
@@ -0,0 +1,354 @@
+/*
+ * INET		An implementation of the TCP/IP protocol suite for the LINUX
+ *		operating system.  INET is implemented using the  BSD Socket
+ *		interface as the means of communication with the user level.
+ *
+ *		Definitions for the AF_INET socket handler.
+ *
+ * Version:	@(#)sock.h	1.0.4	05/13/93
+ *
+ * Authors:	Ross Biro, <bir7@leland.Stanford.Edu>
+ *		Fred N. van Kempen, <waltje@uWalt.NL.Mugnet.ORG>
+ *		Corey Minyard <wf-rch!minyard@relay.EU.net>
+ *		Florian La Roche <flla@stud.uni-sb.de>
+ *
+ * Fixes:
+ *		Alan Cox	:	Volatiles in skbuff pointers. See
+ *					skbuff comments. May be overdone,
+ *					better to prove they can be removed
+ *					than the reverse.
+ *		Alan Cox	:	Added a zapped field for tcp to note
+ *					a socket is reset and must stay shut up
+ *		Alan Cox	:	New fields for options
+ *	Pauline Middelink	:	identd support
+ *
+ *		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 _SOCK_H
+#define _SOCK_H
+
+#include <linux/timer.h>
+#include <linux/ip.h>		/* struct options */
+#include <linux/in.h>		/* struct sockaddr_in */
+#include <linux/tcp.h>		/* struct tcphdr */
+#include <linux/config.h>
+
+#include <linux/skbuff.h>	/* struct sk_buff */
+#include "protocol.h"		/* struct inet_protocol */
+#ifdef CONFIG_AX25
+#include "ax25.h"
+#ifdef CONFIG_NETROM
+#include "netrom.h"
+#endif
+#endif
+#ifdef CONFIG_IPX
+#include "ipx.h"
+#endif
+#ifdef CONFIG_ATALK
+#include "atalk.h"
+#endif
+
+#include <linux/igmp.h>
+
+#define SOCK_ARRAY_SIZE	256		/* Think big (also on some systems a byte is faster */
+
+
+/*
+ * This structure really needs to be cleaned up.
+ * Most of it is for TCP, and not used by any of
+ * the other protocols.
+ */
+struct sock {
+  struct options		*opt;
+  volatile unsigned long	wmem_alloc;
+  volatile unsigned long	rmem_alloc;
+  unsigned long			write_seq;
+  unsigned long			sent_seq;
+  unsigned long			acked_seq;
+  unsigned long			copied_seq;
+  unsigned long			rcv_ack_seq;
+  unsigned long			window_seq;
+  unsigned long			fin_seq;
+  unsigned long			urg_seq;
+  unsigned long			urg_data;
+
+  /*
+   * Not all are volatile, but some are, so we
+   * might as well say they all are.
+   */
+  volatile char                 inuse,
+				dead,
+				urginline,
+				intr,
+				blog,
+				done,
+				reuse,
+				keepopen,
+				linger,
+				delay_acks,
+				destroy,
+				ack_timed,
+				no_check,
+				zapped,	/* In ax25 & ipx means not linked */
+				broadcast,
+				nonagle;
+  unsigned long		        lingertime;
+  int				proc;
+  struct sock			*next;
+  struct sock			*prev; /* Doubly linked chain.. */
+  struct sock			*pair;
+  struct sk_buff		* volatile send_head;
+  struct sk_buff		* volatile send_tail;
+  struct sk_buff_head		back_log;
+  struct sk_buff		*partial;
+  struct timer_list		partial_timer;
+  long				retransmits;
+  struct sk_buff_head		write_queue,
+				receive_queue;
+  struct proto			*prot;
+  struct wait_queue		**sleep;
+  unsigned long			daddr;
+  unsigned long			saddr;
+  unsigned short		max_unacked;
+  unsigned short		window;
+  unsigned short		bytes_rcv;
+/* mss is min(mtu, max_window) */
+  unsigned short		mtu;       /* mss negotiated in the syn's */
+  volatile unsigned short	mss;       /* current eff. mss - can change */
+  volatile unsigned short	user_mss;  /* mss requested by user in ioctl */
+  volatile unsigned short	max_window;
+  unsigned long 		window_clamp;
+  unsigned short		num;
+  volatile unsigned short	cong_window;
+  volatile unsigned short	cong_count;
+  volatile unsigned short	ssthresh;
+  volatile unsigned short	packets_out;
+  volatile unsigned short	shutdown;
+  volatile unsigned long	rtt;
+  volatile unsigned long	mdev;
+  volatile unsigned long	rto;
+/* currently backoff isn't used, but I'm maintaining it in case
+ * we want to go back to a backoff formula that needs it
+ */
+  volatile unsigned short	backoff;
+  volatile short		err;
+  unsigned char			protocol;
+  volatile unsigned char	state;
+  volatile unsigned char	ack_backlog;
+  unsigned char			max_ack_backlog;
+  unsigned char			priority;
+  unsigned char			debug;
+  unsigned short		rcvbuf;
+  unsigned short		sndbuf;
+  unsigned short		type;
+  unsigned char			localroute;	/* Route locally only */
+#ifdef CONFIG_IPX
+  ipx_address			ipx_dest_addr;
+  ipx_interface			*ipx_intrfc;
+  unsigned short		ipx_port;
+  unsigned short		ipx_type;
+#endif
+#ifdef CONFIG_AX25
+  ax25_cb			*ax25;
+#ifdef CONFIG_NETROM
+  nr_cb				*nr;
+#endif
+#endif
+#ifdef CONFIG_ATALK
+  struct atalk_sock		at;
+#endif
+
+/* IP 'private area' or will be eventually */
+  int				ip_ttl;			/* TTL setting 				*/
+  int				ip_tos;			/* TOS 					*/
+  struct tcphdr			dummy_th;
+  struct timer_list		keepalive_timer;	/* TCP keepalive hack 			*/
+  struct timer_list		retransmit_timer;	/* TCP retransmit timer 		*/
+  struct timer_list		ack_timer;		/* TCP delayed ack timer		*/
+  int				ip_xmit_timeout;	/* Why the timeout is running 		*/
+  struct rtable			*ip_route_cache;	/* Cached output route 			*/
+  unsigned long			ip_route_stamp;		/* Route cache stamp 			*/
+  unsigned long			ip_route_daddr;		/* Target address 			*/
+  unsigned long			ip_route_saddr;		/* Source address			*/
+  int				ip_route_local;		/* State of locality flag		*/
+  unsigned long			ip_hcache_stamp;	/* Header cache stamp			*/
+  unsigned long 		*ip_hcache_ver;		/* Pointer to version of cache		*/
+  char				ip_hcache_data[16];	/* Cached header			*/
+  int				ip_hcache_state;	/* Have we a cached header		*/
+  unsigned char			ip_option_len;		/* Length of IP options			*/
+  unsigned char			ip_option_flen;		/* Second fragment option length	*/
+  unsigned char			ip_opt_next_strict;	/* Next hop is strict route		*/
+  unsigned long			ip_opt_next_hop;	/* Next hop if forced			*/
+  unsigned char 		*ip_opt_ptr[2];		/* IP option pointers			*/
+#ifdef CONFIG_IP_MULTICAST  
+  int				ip_mc_ttl;			/* Multicasting TTL 		*/
+  int				ip_mc_loop;			/* Loopback 			*/
+  char				ip_mc_name[MAX_ADDR_LEN];	/* Multicast device name 	*/
+  struct ip_mc_socklist		*ip_mc_list;			/* Group array 			*/
+#endif  
+
+  /* This part is used for the timeout functions (timer.c). */
+  int				timeout;	/* What are we waiting for? */
+  struct timer_list		timer;		/* This is the TIME_WAIT/receive timer when we are doing IP */
+  struct timeval		stamp;
+
+  /* identd */
+  struct socket			*socket;
+  
+  /* Callbacks */
+  void				(*state_change)(struct sock *sk);
+  void				(*data_ready)(struct sock *sk,int bytes);
+  void				(*write_space)(struct sock *sk);
+  void				(*error_report)(struct sock *sk);
+  
+};
+
+struct proto {
+  struct sk_buff *	(*wmalloc)(struct sock *sk,
+				    unsigned long size, int force,
+				    int priority);
+  struct sk_buff *	(*rmalloc)(struct sock *sk,
+				    unsigned long size, int force,
+				    int priority);
+  void			(*wfree)(struct sock *sk, struct sk_buff *skb,
+				 unsigned long size);
+  void			(*rfree)(struct sock *sk, struct sk_buff *skb,
+				 unsigned long size);
+  unsigned long		(*rspace)(struct sock *sk);
+  unsigned long		(*wspace)(struct sock *sk);
+  void			(*close)(struct sock *sk, int timeout);
+  int			(*read)(struct sock *sk, unsigned char *to,
+				int len, int nonblock, unsigned flags);
+  int			(*write)(struct sock *sk, unsigned char *to,
+				 int len, int nonblock, unsigned flags);
+  int			(*sendto)(struct sock *sk,
+				  unsigned char *from, int len, int noblock,
+				  unsigned flags, struct sockaddr_in *usin,
+				  int addr_len);
+  int			(*recvfrom)(struct sock *sk,
+				    unsigned char *from, int len, int noblock,
+				    unsigned flags, struct sockaddr_in *usin,
+				    int *addr_len);
+  int			(*build_header)(struct sk_buff *skb,
+					unsigned long saddr,
+					unsigned long daddr,
+					struct device **dev, int type,
+					struct options *opt, int len, int tos, int ttl);
+  int			(*connect)(struct sock *sk,
+				  struct sockaddr_in *usin, int addr_len);
+  struct sock *		(*accept) (struct sock *sk, int flags);
+  void			(*queue_xmit)(struct sock *sk,
+				      struct device *dev, struct sk_buff *skb,
+				      int free);
+  void			(*retransmit)(struct sock *sk, int all);
+  void			(*write_wakeup)(struct sock *sk);
+  void			(*read_wakeup)(struct sock *sk);
+  int			(*rcv)(struct sk_buff *buff, struct device *dev,
+			       struct options *opt, unsigned long daddr,
+			       unsigned short len, unsigned long saddr,
+			       int redo, struct inet_protocol *protocol);
+  int			(*select)(struct sock *sk, int which,
+				  select_table *wait);
+  int			(*ioctl)(struct sock *sk, int cmd,
+				 unsigned long arg);
+  int			(*init)(struct sock *sk);
+  void			(*shutdown)(struct sock *sk, int how);
+  int			(*setsockopt)(struct sock *sk, int level, int optname,
+  				 char *optval, int optlen);
+  int			(*getsockopt)(struct sock *sk, int level, int optname,
+  				char *optval, int *option);  	 
+  unsigned short	max_header;
+  unsigned long		retransmits;
+  char			name[32];
+  int			inuse, highestinuse;
+#ifndef PACKET_C		/* Hack to save 1K for packet sockets */ 
+  struct sock *		sock_array[SOCK_ARRAY_SIZE];
+#endif PACKET_C  
+};
+
+#define TIME_WRITE	1
+#define TIME_CLOSE	2
+#define TIME_KEEPOPEN	3
+#define TIME_DESTROY	4
+#define TIME_DONE	5	/* used to absorb those last few packets */
+#define TIME_PROBE0	6
+#define SOCK_DESTROY_TIME 1000	/* about 10 seconds			*/
+
+#define PROT_SOCK	1024	/* Sockets 0-1023 can't be bound too unless you are superuser */
+
+#define SHUTDOWN_MASK	3
+#define RCV_SHUTDOWN	1
+#define SEND_SHUTDOWN	2
+
+
+extern void			destroy_sock(struct sock *sk);
+extern unsigned short		get_new_socknum(struct proto *, unsigned short);
+extern void			put_sock(unsigned short, struct sock *); 
+extern void			release_sock(struct sock *sk);
+extern struct sock		*get_sock(struct proto *, unsigned short,
+					  unsigned long, unsigned short,
+					  unsigned long);
+extern struct sock		*get_sock_mcast(struct sock *, unsigned short,
+					  unsigned long, unsigned short,
+					  unsigned long);
+extern struct sock		*get_sock_raw(struct sock *, unsigned short,
+					  unsigned long, unsigned long);
+
+extern struct sk_buff		*sock_wmalloc(struct sock *sk,
+					      unsigned long size, int force,
+					      int priority);
+extern struct sk_buff		*sock_rmalloc(struct sock *sk,
+					      unsigned long size, int force,
+					      int priority);
+extern void			sock_wfree(struct sock *sk, struct sk_buff *skb,
+					   unsigned long size);
+extern void			sock_rfree(struct sock *sk, struct sk_buff *skb,
+					   unsigned long size);
+extern unsigned long		sock_rspace(struct sock *sk);
+extern unsigned long		sock_wspace(struct sock *sk);
+
+extern int			sock_setsockopt(struct sock *sk,int level,int op,char *optval,int optlen);
+
+extern int			sock_getsockopt(struct sock *sk,int level,int op,char *optval,int *optlen);
+extern struct sk_buff 		*sock_alloc_send_skb(struct sock *skb, unsigned long size, int noblock, int *errcode);
+
+/*
+ *	Queue a received datagram if it will fit. Stream and sequenced protocols
+ *	can't normally use this as they need to fit buffers in and play with them.
+ *
+ *	Inlined as its very short and called for pretty much every packet ever
+ *	received.
+ */
+
+extern __inline__ int sock_queue_rcv_skb(struct sock *sk, struct sk_buff *skb)
+{
+	unsigned long flags;
+	if(sk->rmem_alloc + skb->mem_len >= sk->rcvbuf)
+		return -ENOMEM;
+	save_flags(flags);
+	cli();
+	sk->rmem_alloc+=skb->mem_len;
+	skb->sk=sk;
+	restore_flags(flags);
+	skb_queue_tail(&sk->receive_queue,skb);
+	if(!sk->dead)
+		sk->data_ready(sk,skb->len);
+	return 0;
+}
+
+/* declarations from timer.c */
+extern struct sock *timer_base;
+
+void delete_timer (struct sock *);
+void reset_timer (struct sock *, int, unsigned long);
+void net_timer (unsigned long);
+
+
+/* Enable debug/info messages */
+
+#define NETDEBUG(x)		x
+
+#endif	/* _SOCK_H */