root/net/inet/sock.h

/* */

INCLUDED FROM

   1 /*
   2  * INET         An implementation of the TCP/IP protocol suite for the LINUX
   3  *              operating system.  INET is implemented using the  BSD Socket
   4  *              interface as the means of communication with the user level.
   5  *
   6  *              Definitions for the AF_INET socket handler.
   7  *
   8  * Version:     @(#)sock.h      1.0.4   05/13/93
   9  *
  10  * Authors:     Ross Biro, <bir7@leland.Stanford.Edu>
  11  *              Fred N. van Kempen, <waltje@uWalt.NL.Mugnet.ORG>
  12  *              Corey Minyard <wf-rch!minyard@relay.EU.net>
  13  *              Florian La Roche <flla@stud.uni-sb.de>
  14  *
  15  *              This program is free software; you can redistribute it and/or
  16  *              modify it under the terms of the GNU General Public License
  17  *              as published by the Free Software Foundation; either version
  18  *              2 of the License, or (at your option) any later version.
  19  */
  20 #ifndef _SOCK_H
  21 #define _SOCK_H
  22 
  23 #include <linux/timer.h>
  24 
  25 #define SOCK_ARRAY_SIZE 64
  26 
  27 
  28 /*
  29  * This structure really needs to be cleaned up.
  30  * Most of it is for TCP, and not used by any of
  31  * the other protocols.
  32  */
  33 struct sock {
  34   struct options                *opt;
  35   volatile unsigned long        wmem_alloc;
  36   volatile unsigned long        rmem_alloc;
  37   unsigned long                 send_seq;
  38   unsigned long                 acked_seq;
  39   unsigned long                 copied_seq;
  40   unsigned long                 rcv_ack_seq;
  41   unsigned long                 window_seq;
  42   unsigned long                 fin_seq;
  43 
  44   /*
  45    * Not all are volatile, but some are, so we
  46    * might as well say they all are.
  47    */
  48   volatile char                 inuse,
  49                                 dead,
  50                                 urginline,
  51                                 intr,
  52                                 blog,
  53                                 done,
  54                                 reuse,
  55                                 keepopen,
  56                                 linger,
  57                                 delay_acks,
  58                                 destroy,
  59                                 ack_timed,
  60                                 no_check,
  61                                 exp_growth;
  62   int                           proc;
  63   struct sock                   *next;
  64   struct sock                   *pair;
  65   struct sk_buff                *send_tail;
  66   struct sk_buff                *send_head;
  67   struct sk_buff                *volatile back_log;
  68   struct sk_buff                *send_tmp;
  69   long                          retransmits;
  70   struct sk_buff                *wback,
  71                                 *wfront,
  72                                 *rqueue;
  73   struct proto                  *prot;
  74   struct wait_queue             **sleep;
  75   unsigned long                 daddr;
  76   unsigned long                 saddr;
  77   unsigned short                max_unacked;
  78   unsigned short                window;
  79   unsigned short                bytes_rcv;
  80   unsigned short                mtu;
  81   unsigned short                num;
  82   volatile unsigned short       cong_window;
  83   volatile unsigned short       packets_out;
  84   volatile unsigned short       urg;
  85   volatile unsigned short       shutdown;
  86   unsigned short                mss;
  87   volatile unsigned long        rtt;
  88   volatile unsigned long        mdev;
  89   volatile unsigned short       backoff;
  90   volatile short                err;
  91   unsigned char                 protocol;
  92   volatile unsigned char        state;
  93   volatile unsigned char        ack_backlog;
  94   unsigned char                 max_ack_backlog;
  95   unsigned char                 priority;
  96   struct tcphdr                 dummy_th;
  97 
  98   /* This part is used for the timeout functions (timer.c). */
  99   int                           timeout;        /* What are we waiting for? */
 100   struct timer_list             timer;
 101 };
 102 
 103 struct proto {
 104   void                  *(*wmalloc)(struct sock *sk,
 105                                     unsigned long size, int force,
 106                                     int priority);
 107   void                  *(*rmalloc)(struct sock *sk,
 108                                     unsigned long size, int force,
 109                                     int priority);
 110   void                  (*wfree)(struct sock *sk, void *mem,
 111                                  unsigned long size);
 112   void                  (*rfree)(struct sock *sk, void *mem,
 113                                  unsigned long size);
 114   unsigned long         (*rspace)(struct sock *sk);
 115   unsigned long         (*wspace)(struct sock *sk);
 116   void                  (*close)(struct sock *sk, int timeout);
 117   int                   (*read)(struct sock *sk, unsigned char *to,
 118                                 int len, int nonblock, unsigned flags);
 119   int                   (*write)(struct sock *sk, unsigned char *to,
 120                                  int len, int nonblock, unsigned flags);
 121   int                   (*sendto)(struct sock *sk,
 122                                   unsigned char *from, int len, int noblock,
 123                                   unsigned flags, struct sockaddr_in *usin,
 124                                   int addr_len);
 125   int                   (*recvfrom)(struct sock *sk,
 126                                     unsigned char *from, int len, int noblock,
 127                                     unsigned flags, struct sockaddr_in *usin,
 128                                     int *addr_len);
 129   int                   (*build_header)(struct sk_buff *skb,
 130                                         unsigned long saddr,
 131                                         unsigned long daddr,
 132                                         struct device **dev, int type,
 133                                         struct options *opt, int len);
 134   int                   (*connect)(struct sock *sk,
 135                                   struct sockaddr_in *usin, int addr_len);
 136   struct sock           *(*accept) (struct sock *sk, int flags);
 137   void                  (*queue_xmit)(struct sock *sk,
 138                                       struct device *dev, struct sk_buff *skb,
 139                                       int free);
 140   void                  (*retransmit)(struct sock *sk, int all);
 141   void                  (*write_wakeup)(struct sock *sk);
 142   void                  (*read_wakeup)(struct sock *sk);
 143   int                   (*rcv)(struct sk_buff *buff, struct device *dev,
 144                                struct options *opt, unsigned long daddr,
 145                                unsigned short len, unsigned long saddr,
 146                                int redo, struct inet_protocol *protocol);
 147   int                   (*select)(struct sock *sk, int which,
 148                                   select_table *wait);
 149   int                   (*ioctl)(struct sock *sk, int cmd,
 150                                  unsigned long arg);
 151   int                   (*init)(struct sock *sk);
 152   void                  (*shutdown)(struct sock *sk, int how);
 153   unsigned short        max_header;
 154   unsigned long         retransmits;
 155   struct sock           *sock_array[SOCK_ARRAY_SIZE];
 156   char                  name[80];
 157 };
 158 
 159 #define TIME_WRITE      1
 160 #define TIME_CLOSE      2
 161 #define TIME_KEEPOPEN   3
 162 #define TIME_DESTROY    4
 163 #define TIME_DONE       5       /* used to absorb those last few packets */
 164 #define SOCK_DESTROY_TIME 1000  /* about 10 seconds                     */
 165 
 166 
 167 #define PROT_SOCK       1024
 168 #define SHUTDOWN_MASK   3
 169 #define RCV_SHUTDOWN    1
 170 #define SEND_SHUTDOWN   2
 171 
 172 
 173 extern void                     destroy_sock(struct sock *sk);
 174 extern unsigned short           get_new_socknum(struct proto *, unsigned short);
 175 extern void                     put_sock(unsigned short, struct sock *); 
 176 extern void                     release_sock(struct sock *sk);
 177 extern struct sock              *get_sock(struct proto *, unsigned short,
 178                                           unsigned long, unsigned short,
 179                                           unsigned long);
 180 extern void                     print_sk(struct sock *);
 181 extern void                     *sock_wmalloc(struct sock *sk,
 182                                               unsigned long size, int force,
 183                                               int priority);
 184 extern void                     *sock_rmalloc(struct sock *sk,
 185                                               unsigned long size, int force,
 186                                               int priority);
 187 extern void                     sock_wfree(struct sock *sk, void *mem,
 188                                            unsigned long size);
 189 extern void                     sock_rfree(struct sock *sk, void *mem,
 190                                            unsigned long size);
 191 extern unsigned long            sock_rspace(struct sock *sk);
 192 extern unsigned long            sock_wspace(struct sock *sk);
 193 
 194 
 195 /* declarations from timer.c */
 196 extern struct sock *timer_base;
 197 
 198 void delete_timer (struct sock *);
 199 void reset_timer (struct sock *, int, unsigned long);
 200 void net_timer (unsigned long);
 201 
 202 
 203 #endif  /* _SOCK_H */

/* */