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/*
* 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/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"
#endif
#ifdef CONFIG_IPX
#include "ipx.h"
#endif
#ifdef CONFIG_ATALK
#include <linux/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
/* Really we want to add a per protocol private area */
ax25_address ax25_source_addr,ax25_dest_addr;
struct sk_buff *volatile ax25_retxq[8];
char ax25_state,ax25_vs,ax25_vr,ax25_lastrxnr,ax25_lasttxnr;
char ax25_condition;
char ax25_retxcnt;
char ax25_xx;
char ax25_retxqi;
char ax25_rrtimer;
char ax25_timer;
unsigned char ax25_n2;
unsigned short ax25_t1,ax25_t2,ax25_t3;
ax25_digi *ax25_digipeat;
#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 */
#ifdef CONFIG_IP_MULTICAST
int ip_mc_ttl; /* Multicasting TTL */
int ip_mc_loop; /* Loopback (not implemented yet) */
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;
struct sock * sock_array[SOCK_ARRAY_SIZE];
char name[80];
int inuse, highestinuse;
};
#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);
extern int sock_queue_rcv_skb(struct sock *sk, struct sk_buff *skb);
/* 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);
#endif /* _SOCK_H */
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