root/net/tcp/sock.h

/* */

INCLUDED FROM

   1 /* sock.h */
   2 /*
   3     Copyright (C) 1992  Ross Biro
   4 
   5     This program is free software; you can redistribute it and/or modify
   6     it under the terms of the GNU General Public License as published by
   7     the Free Software Foundation; either version 2, or (at your option)
   8     any later version.
   9 
  10     This program is distributed in the hope that it will be useful,
  11     but WITHOUT ANY WARRANTY; without even the implied warranty of
  12     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13     GNU General Public License for more details.
  14 
  15     You should have received a copy of the GNU General Public License
  16     along with this program; if not, write to the Free Software
  17     Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. 
  18 
  19     The Author may be reached as bir7@leland.stanford.edu or
  20     C/O Department of Mathematics; Stanford University; Stanford, CA 94305
  21 */
  22 /* $Id: sock.h,v 0.8.4.2 1992/11/10 10:38:48 bir7 Exp $ */
  23 /* $Log: sock.h,v $
  24  * Revision 0.8.4.2  1992/11/10  10:38:48  bir7
  25  * Change free_s to kfree_s and accidently changed free_skb to kfree_skb.
  26  *
  27  * Revision 0.8.4.1  1992/11/10  00:17:18  bir7
  28  * version change only.
  29  *
  30  * Revision 0.8.3.4  1992/11/10  00:14:47  bir7
  31  * Changed malloc to kmalloc and added $iId$ and $Log: sock.h,v $
  32  * Revision 0.8.4.2  1992/11/10  10:38:48  bir7
  33  * Change free_s to kfree_s and accidently changed free_skb to kfree_skb.
  34  *
  35  * Revision 0.8.4.1  1992/11/10  00:17:18  bir7
  36  * version change only.
  37  *.
  38  * */
  39 #ifndef _TCP_SOCK_H
  40 #define _TCP_SOCK_H
  41 
  42 #define SOCK_ARRAY_SIZE 64
  43 
  44 /* This structure really needs to be cleaned up.  Most of it is
  45    for tcp, and not used by any of the other protocols. */
  46 
  47 struct sock 
  48 {
  49   struct options *opt;
  50   unsigned long wmem_alloc;
  51   unsigned long rmem_alloc;
  52   unsigned long send_seq;
  53   unsigned long acked_seq;
  54   unsigned long copied_seq;
  55   unsigned long rcv_ack_seq;
  56   unsigned long window_seq;
  57   unsigned long fin_seq;
  58   unsigned long inuse:1, dead:1, urginline:1,
  59                 intr:1, blog:1, done:1, reuse:1, keepopen:1, linger:1,
  60                 delay_acks:1, timeout:3, destroy:1, ack_timed:1, no_check:1,
  61                 exp_growth:1;
  62   int proc;
  63   volatile struct sock *next;
  64   volatile struct sock *pair;
  65   struct sk_buff *send_tail;
  66   struct sk_buff *send_head;
  67   struct sk_buff *back_log;
  68   long retransmits;
  69   struct sk_buff *wback, *wfront, *rqueue;
  70   struct proto *prot;
  71   struct wait_queue **sleep;
  72   unsigned long daddr;
  73   unsigned long saddr;
  74   unsigned short max_unacked;
  75   unsigned short window;
  76   unsigned short bytes_rcv;
  77   unsigned short mtu;
  78   unsigned short num;
  79   unsigned short cong_window;
  80   unsigned short packets_out;
  81   unsigned short urg;
  82   unsigned short shutdown;
  83   short rtt;
  84   short err;
  85   unsigned char protocol;
  86   unsigned char state;
  87   unsigned char ack_backlog;
  88   unsigned char max_ack_backlog;
  89   unsigned char priority;
  90   struct tcp_header dummy_th; /* I may be able to get rid of this. */
  91   struct timer time_wait;
  92 };
  93 
  94 struct proto 
  95 {
  96   void *(*wmalloc)(volatile struct sock *sk, unsigned long size, int force,
  97                    int priority);
  98   void *(*rmalloc)(volatile struct sock *sk, unsigned long size, int force,
  99                    int priority);
 100   void (*wfree)(volatile struct sock *sk, void *mem, unsigned long size);
 101   void (*rfree)(volatile struct sock *sk, void *mem, unsigned long size);
 102   unsigned long (*rspace)(volatile struct sock *sk);
 103   unsigned long (*wspace)(volatile struct sock *sk);
 104   void (*close)(volatile struct sock *sk, int timeout);
 105   int (*read)(volatile struct sock *sk, unsigned char *to, int len,
 106               int nonblock, unsigned flags);
 107   int (*write)(volatile struct sock *sk, unsigned char *to, int len,
 108                int nonblock, unsigned flags);
 109   int (*sendto) (volatile struct sock *sk, unsigned char *from, int len,
 110                  int noblock, unsigned flags, struct sockaddr_in *usin,
 111                  int addr_len);
 112   int (*recvfrom) (volatile struct sock *sk, unsigned char *from, int len,
 113                    int noblock, unsigned flags, struct sockaddr_in *usin,
 114                    int *addr_len);
 115   int (*build_header) (struct sk_buff *skb, unsigned long saddr,
 116                        unsigned long daddr, struct device **dev, int type,
 117                        struct options *opt, int len);
 118   int (*connect) (volatile struct sock *sk, struct sockaddr_in *usin,
 119                   int addr_len);
 120   volatile struct sock *(*accept) (volatile struct sock *sk, int flags);
 121   void  (*queue_xmit) (volatile struct sock *sk, struct device *dev, 
 122                        struct sk_buff *skb, int free);
 123   void (*retransmit) (volatile struct sock *sk, int all);
 124   void (*write_wakeup) (volatile struct sock *sk);
 125   void (*read_wakeup) (volatile struct sock *sk);
 126   int (*rcv)(struct sk_buff *buff, struct device *dev, struct options *opt,
 127              unsigned long daddr, unsigned short len,
 128              unsigned long saddr, int redo, struct ip_protocol *protocol);
 129   int (*select)(volatile struct sock *sk, int which, select_table *wait);
 130   int (*ioctl) (volatile struct sock *sk, int cmd, unsigned long arg);
 131   int (*init) (volatile struct sock *sk);
 132   unsigned short max_header;
 133   unsigned long retransmits;
 134   volatile struct sock *sock_array[SOCK_ARRAY_SIZE];
 135 };
 136 
 137 #define TIME_WRITE 1
 138 #define TIME_CLOSE 2
 139 #define TIME_KEEPOPEN 3
 140 #define TIME_DESTROY 4
 141 #define TIME_DONE 5 /* used to absorb those last few packets. */
 142 #define SOCK_DESTROY_TIME 1000 /* about 10 seconds. */
 143 
 144 /* used with free skb */
 145 #define FREE_READ 1
 146 #define FREE_WRITE 0
 147 
 148 struct sk_buff
 149 {
 150   struct sk_buff *next;
 151   struct sk_buff *prev;
 152   struct sk_buff *link3;
 153   volatile struct sock *sk;
 154   unsigned long when; /* used to compute rtt's. */
 155   struct device *dev;
 156   void *mem_addr;
 157   union
 158     {
 159        struct tcp_header *th;
 160        struct enet_header *eth;
 161        struct ip_header *iph;
 162        struct udp_header *uh;
 163        struct arp *arp;
 164        unsigned char *raw;
 165        unsigned long seq;
 166     } h;
 167   unsigned long mem_len;
 168   unsigned long len;
 169   unsigned long saddr;
 170   unsigned long daddr;
 171   unsigned long acked:1,used:1,free:1,arp:1, urg_used:1, lock:1;
 172 };
 173 
 174 #define PROT_SOCK 1024
 175 #define SK_WMEM_MAX 8192
 176 #define SK_RMEM_MAX 32767
 177 #define SHUTDOWN_MASK 3
 178 #define RCV_SHUTDOWN 1
 179 #define SEND_SHUTDOWN 2
 180 
 181 void destroy_sock (volatile struct sock *sk);
 182 unsigned short get_new_socknum (struct proto *, unsigned short);
 183 void put_sock (unsigned short, volatile struct sock *); 
 184 void release_sock (volatile struct sock *sk);
 185 volatile struct sock *get_sock(struct proto *, unsigned short, unsigned long,
 186                                unsigned short, unsigned long);
 187 void print_sk (volatile struct sock *);
 188 void print_skb (struct sk_buff *);
 189 void *sock_wmalloc(volatile struct sock *sk, unsigned long size, int force,
 190                    int priority);
 191 void *sock_rmalloc(volatile struct sock *sk, unsigned long size, int force,
 192                    int priority);
 193 void sock_wfree(volatile struct sock *sk, void *mem, unsigned long size);
 194 void sock_rfree(volatile struct sock *sk, void *mem, unsigned long size);
 195 unsigned long sock_rspace(volatile struct sock *sk);
 196 unsigned long sock_wspace(volatile struct sock *sk);
 197 void kfree_skb (struct sk_buff *skb, int rw);
 198 void lock_skb (struct sk_buff *skb);
 199 void unlock_skb (struct sk_buff *skb, int rw);
 200 
 201 void dummy_routine(void *, ... );
 202 
 203 #endif

/* */