isdn_bsdcomp.c File Reference

#include <linux/module.h>
#include <linux/init.h>
#include <linux/kernel.h>
#include <linux/types.h>
#include <linux/fcntl.h>
#include <linux/interrupt.h>
#include <linux/ptrace.h>
#include <linux/ioport.h>
#include <linux/in.h>
#include <linux/slab.h>
#include <linux/tty.h>
#include <linux/errno.h>
#include <linux/string.h>
#include <linux/signal.h>
#include <linux/bitops.h>
#include <asm/byteorder.h>
#include <asm/types.h>
#include <linux/if.h>
#include <linux/if_ether.h>
#include <linux/netdevice.h>
#include <linux/skbuff.h>
#include <linux/inet.h>
#include <linux/ioctl.h>
#include <linux/vmalloc.h>
#include <linux/ppp_defs.h>
#include <linux/isdn.h>
#include <linux/isdn_ppp.h>
#include <linux/ip.h>
#include <linux/tcp.h>
#include <linux/if_arp.h>
#include <linux/ppp-comp.h>
#include "isdn_ppp.h"

Go to the source code of this file.

Data Structures
struct	bsd_dict
struct	bsd_db

Macros
#define	BSD_VERSION(x)   ((x) >> 5)
#define	BSD_NBITS(x)   ((x) & 0x1F)
#define	BSD_CURRENT_VERSION   1
#define	DEBUG   1
#define	BSD_OVHD   2 /* BSD compress overhead/packet */
#define	MIN_BSD_BITS   9
#define	BSD_INIT_BITS   MIN_BSD_BITS
#define	MAX_BSD_BITS   15
#define	CLEAR   256 /* table clear output code */
#define	FIRST   257 /* first free entry */
#define	LAST   255
#define	MAXCODE(b)   ((1 << (b)) - 1)
#define	BADCODEM1   MAXCODE(MAX_BSD_BITS)
#define	BSD_HASH(prefix, suffix, hshift)
#define	BSD_KEY(prefix, suffix)
#define	CHECK_GAP   10000 /* Ratio check interval */
#define	RATIO_SCALE_LOG   8
#define	RATIO_SCALE   (1 << RATIO_SCALE_LOG)
#define	RATIO_MAX   (0x7fffffff >> RATIO_SCALE_LOG)
#define	dict_ptrx(p, idx)   &(p->dict[idx])
#define	lens_ptrx(p, idx)   &(p->lens[idx])
#define	OUTPUT(ent)

Functions
	MODULE_DESCRIPTION ("ISDN4Linux: BSD Compression for PPP over ISDN")
	MODULE_LICENSE ("Dual BSD/GPL")
	module_init (isdn_bsdcomp_init)
	module_exit (isdn_bsdcomp_exit)

Macro Definition Documentation

#define BADCODEM1   MAXCODE(MAX_BSD_BITS)

Definition at line 157 of file isdn_bsdcomp.c.

#define BSD_CURRENT_VERSION   1

Definition at line 101 of file isdn_bsdcomp.c.

#define BSD_HASH	(		prefix,
			suffix,
			hshift
	)

Value:

((((unsigned long)(suffix)) << (hshift)) \
                      ^ (unsigned long)(prefix))

Definition at line 159 of file isdn_bsdcomp.c.

#define BSD_INIT_BITS   MIN_BSD_BITS

Definition at line 145 of file isdn_bsdcomp.c.

#define BSD_KEY	(		prefix,
			suffix
	)

Value:

((((unsigned long)(suffix)) << 16) \
                     + (unsigned long)(prefix))

Definition at line 161 of file isdn_bsdcomp.c.

#define BSD_NBITS

(

x

)

((x) & 0x1F)

Definition at line 99 of file isdn_bsdcomp.c.

#define BSD_OVHD   2 /* BSD compress overhead/packet */

Definition at line 143 of file isdn_bsdcomp.c.

#define BSD_VERSION

(

x

)

((x) >> 5)

Definition at line 98 of file isdn_bsdcomp.c.

#define CHECK_GAP   10000 /* Ratio check interval */

Definition at line 164 of file isdn_bsdcomp.c.

#define CLEAR   256 /* table clear output code */

Definition at line 152 of file isdn_bsdcomp.c.

#define DEBUG   1

Definition at line 103 of file isdn_bsdcomp.c.

#define dict_ptrx	(		p,
			idx
	)		&(p->dict[idx])

Definition at line 423 of file isdn_bsdcomp.c.

#define FIRST   257 /* first free entry */

Definition at line 153 of file isdn_bsdcomp.c.

#define LAST   255

Definition at line 154 of file isdn_bsdcomp.c.

#define lens_ptrx	(		p,
			idx
	)		&(p->lens[idx])

Definition at line 424 of file isdn_bsdcomp.c.

#define MAX_BSD_BITS   15

Definition at line 146 of file isdn_bsdcomp.c.

#define MAXCODE

(

b

)

((1 << (b)) - 1)

Definition at line 156 of file isdn_bsdcomp.c.

#define MIN_BSD_BITS   9

Definition at line 144 of file isdn_bsdcomp.c.

#define OUTPUT

(

ent

)

Value:

{                               \
        bitno -= n_bits;                    \
        accm |= ((ent) << bitno);               \
        do  {                       \
            if (skb_out && skb_tailroom(skb_out) > 0)   \
                *(skb_put(skb_out, 1)) = (unsigned char)(accm >> 24); \
            accm <<= 8;                 \
            bitno += 8;                 \
        } while (bitno <= 24);                  \
    }

#define RATIO_MAX   (0x7fffffff >> RATIO_SCALE_LOG)

Definition at line 168 of file isdn_bsdcomp.c.

#define RATIO_SCALE   (1 << RATIO_SCALE_LOG)

Definition at line 167 of file isdn_bsdcomp.c.

#define RATIO_SCALE_LOG   8

Definition at line 166 of file isdn_bsdcomp.c.

Function Documentation

MODULE_DESCRIPTION

(

"ISDN4Linux: BSD Compression for PPP over ISDN"

)

module_exit

(

isdn_bsdcomp_exit

)

module_init

(

isdn_bsdcomp_init

)

MODULE_LICENSE

(

"Dual BSD/GPL"

)