Release 4.11 drivers/net/ppp/ppp_deflate.c

/*
 * ppp_deflate.c - interface the zlib procedures for Deflate compression
 * and decompression (as used by gzip) to the PPP code.
 *
 * Copyright 1994-1998 Paul Mackerras.
 *
 *  This program is free software; you can redistribute it and/or
 *  modify it under the terms of the GNU General Public License
 *  version 2 as published by the Free Software Foundation.
 */

#include <linux/module.h>
#include <linux/slab.h>
#include <linux/vmalloc.h>
#include <linux/init.h>
#include <linux/string.h>

#include <linux/ppp_defs.h>
#include <linux/ppp-comp.h>

#include <linux/zlib.h>
#include <asm/unaligned.h>

/*
 * State for a Deflate (de)compressor.
 */

struct ppp_deflate_state {
    
int		seqno;
    
int		w_size;
    
int		unit;
    
int		mru;
    
int		debug;
    
z_stream	strm;
    
struct compstat stats;
};


#define DEFLATE_OVHD	2		
/* Deflate overhead/packet */

static void	*z_comp_alloc(unsigned char *options, int opt_len);
static void	*z_decomp_alloc(unsigned char *options, int opt_len);
static void	z_comp_free(void *state);
static void	z_decomp_free(void *state);
static int	z_comp_init(void *state, unsigned char *options,
				 int opt_len,
				 int unit, int hdrlen, int debug);
static int	z_decomp_init(void *state, unsigned char *options,
				   int opt_len,
				   int unit, int hdrlen, int mru, int debug);
static int	z_compress(void *state, unsigned char *rptr,
				unsigned char *obuf,
				int isize, int osize);
static void	z_incomp(void *state, unsigned char *ibuf, int icnt);
static int	z_decompress(void *state, unsigned char *ibuf,
				int isize, unsigned char *obuf, int osize);
static void	z_comp_reset(void *state);
static void	z_decomp_reset(void *state);
static void	z_comp_stats(void *state, struct compstat *stats);

/**
 *      z_comp_free - free the memory used by a compressor
 *      @arg:   pointer to the private state for the compressor.
 */


static void z_comp_free(void *arg)
{
	struct ppp_deflate_state *state = (struct ppp_deflate_state *) arg;

	if (state) {
		zlib_deflateEnd(&state->strm);
		vfree(state->strm.workspace);
		kfree(state);
	}
}

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Linus Torvalds (pre-git)
37
74.00%
1
20.00%
Paul Mackerras
9
18.00%
2
40.00%
David Woodhouse
3
6.00%
1
20.00%
Linus Torvalds
1
2.00%
1
20.00%
Total
50
100.00%
5
100.00%

/**
 *      z_comp_alloc - allocate space for a compressor.
 *      @options: pointer to CCP option data
 *      @opt_len: length of the CCP option at @options.
 *
 *      The @options pointer points to the a buffer containing the
 *      CCP option data for the compression being negotiated.  It is
 *      formatted according to RFC1979, and describes the window
 *      size that the peer is requesting that we use in compressing
 *      data to be sent to it.
 *
 *      Returns the pointer to the private state for the compressor,
 *      or NULL if we could not allocate enough memory.
 */


static void *z_comp_alloc(unsigned char *options, int opt_len)
{
	struct ppp_deflate_state *state;
	int w_size;

	if (opt_len != CILEN_DEFLATE ||
	    (options[0] != CI_DEFLATE && options[0] != CI_DEFLATE_DRAFT) ||
	    options[1] != CILEN_DEFLATE ||
	    DEFLATE_METHOD(options[2]) != DEFLATE_METHOD_VAL ||
	    options[3] != DEFLATE_CHK_SEQUENCE)
		return NULL;
	w_size = DEFLATE_SIZE(options[2]);
	if (w_size < DEFLATE_MIN_SIZE || w_size > DEFLATE_MAX_SIZE)
		return NULL;

	state = kzalloc(sizeof(*state),
						     GFP_KERNEL);
	if (state == NULL)
		return NULL;

	state->strm.next_in   = NULL;
	state->w_size         = w_size;
	state->strm.workspace = vmalloc(zlib_deflate_workspacesize(-w_size, 8));
	if (state->strm.workspace == NULL)
		goto out_free;

	if (zlib_deflateInit2(&state->strm, Z_DEFAULT_COMPRESSION,
			 DEFLATE_METHOD_VAL, -w_size, 8, Z_DEFAULT_STRATEGY)
	    != Z_OK)
		goto out_free;
	return (void *) state;

out_free:
	z_comp_free(state);
	return NULL;
}

Contributors
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Linus Torvalds (pre-git)
176
86.27%
3
37.50%
Linus Torvalds
18
8.82%
1
12.50%
James Keniston
6
2.94%
1
12.50%
Paul Mackerras
2
0.98%
1
12.50%
Yoann Padioleau
1
0.49%
1
12.50%
David Woodhouse
1
0.49%
1
12.50%
Total
204
100.00%
8
100.00%

/**
 *      z_comp_init - initialize a previously-allocated compressor.
 *      @arg:   pointer to the private state for the compressor
 *      @options: pointer to the CCP option data describing the
 *              compression that was negotiated with the peer
 *      @opt_len: length of the CCP option data at @options
 *      @unit:  PPP unit number for diagnostic messages
 *      @hdrlen: ignored (present for backwards compatibility)
 *      @debug: debug flag; if non-zero, debug messages are printed.
 *
 *      The CCP options described by @options must match the options
 *      specified when the compressor was allocated.  The compressor
 *      history is reset.  Returns 0 for failure (CCP options don't
 *      match) or 1 for success.
 */


static int z_comp_init(void *arg, unsigned char *options, int opt_len,
		       int unit, int hdrlen, int debug)
{
	struct ppp_deflate_state *state = (struct ppp_deflate_state *) arg;

	if (opt_len < CILEN_DEFLATE ||
	    (options[0] != CI_DEFLATE && options[0] != CI_DEFLATE_DRAFT) ||
	    options[1] != CILEN_DEFLATE ||
	    DEFLATE_METHOD(options[2]) != DEFLATE_METHOD_VAL ||
	    DEFLATE_SIZE(options[2]) != state->w_size ||
	    options[3] != DEFLATE_CHK_SEQUENCE)
		return 0;

	state->seqno = 0;
	state->unit  = unit;
	state->debug = debug;

	zlib_deflateReset(&state->strm);

	return 1;
}

Contributors
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Linus Torvalds (pre-git)
119
92.25%
2
50.00%
Paul Mackerras
9
6.98%
1
25.00%
Linus Torvalds
1
0.78%
1
25.00%
Total
129
100.00%
4
100.00%

/**
 *      z_comp_reset - reset a previously-allocated compressor.
 *      @arg:   pointer to private state for the compressor.
 *
 *      This clears the history for the compressor and makes it
 *      ready to start emitting a new compressed stream.
 */


static void z_comp_reset(void *arg)
{
	struct ppp_deflate_state *state = (struct ppp_deflate_state *) arg;

	state->seqno = 0;
	zlib_deflateReset(&state->strm);
}

Contributors
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CommitProp
Linus Torvalds (pre-git)
34
94.44%
1
33.33%
Paul Mackerras
1
2.78%
1
33.33%
Linus Torvalds
1
2.78%
1
33.33%
Total
36
100.00%
3
100.00%

/**
 *      z_compress - compress a PPP packet with Deflate compression.
 *      @arg:   pointer to private state for the compressor
 *      @rptr:  uncompressed packet (input)
 *      @obuf:  compressed packet (output)
 *      @isize: size of uncompressed packet
 *      @osize: space available at @obuf
 *
 *      Returns the length of the compressed packet, or 0 if the
 *      packet is incompressible.
 */


static int z_compress(void *arg, unsigned char *rptr, unsigned char *obuf,
	       int isize, int osize)
{
	struct ppp_deflate_state *state = (struct ppp_deflate_state *) arg;
	int r, proto, off, olen, oavail;
	unsigned char *wptr;

	/*
         * Check that the protocol is in the range we handle.
         */
	proto = PPP_PROTOCOL(rptr);
	if (proto > 0x3fff || proto == 0xfd || proto == 0xfb)
		return 0;

	/* Don't generate compressed packets which are larger than
           the uncompressed packet. */
	if (osize > isize)
		osize = isize;

	wptr = obuf;

	/*
         * Copy over the PPP header and store the 2-byte sequence number.
         */
	wptr[0] = PPP_ADDRESS(rptr);
	wptr[1] = PPP_CONTROL(rptr);
	put_unaligned_be16(PPP_COMP, wptr + 2);
	wptr += PPP_HDRLEN;
	put_unaligned_be16(state->seqno, wptr);
	wptr += DEFLATE_OVHD;
	olen = PPP_HDRLEN + DEFLATE_OVHD;
	state->strm.next_out = wptr;
	state->strm.avail_out = oavail = osize - olen;
	++state->seqno;

	off = (proto > 0xff) ? 2 : 3;	/* skip 1st proto byte if 0 */
	rptr += off;
	state->strm.next_in = rptr;
	state->strm.avail_in = (isize - off);

	for (;;) {
		r = zlib_deflate(&state->strm, Z_PACKET_FLUSH);
		if (r != Z_OK) {
			if (state->debug)
				printk(KERN_ERR
				       "z_compress: deflate returned %d\n", r);
			break;
		}
		if (state->strm.avail_out == 0) {
			olen += oavail;
			state->strm.next_out = NULL;
			state->strm.avail_out = oavail = 1000000;
		} else {
			break;		/* all done */
		}
	}
	olen += oavail - state->strm.avail_out;

	/*
         * See if we managed to reduce the size of the packet.
         */
	if (olen < isize && olen <= osize) {
		state->stats.comp_bytes += olen;
		state->stats.comp_packets++;
	} else {
		state->stats.inc_bytes += isize;
		state->stats.inc_packets++;
		olen = 0;
	}
	state->stats.unc_bytes += isize;
	state->stats.unc_packets++;

	return olen;
}

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Linus Torvalds (pre-git)
345
93.75%
2
28.57%
Changli Gao
10
2.72%
1
14.29%
Paul Mackerras
7
1.90%
1
14.29%
Florian Westphal
4
1.09%
1
14.29%
Stephen Hemminger
1
0.27%
1
14.29%
Linus Torvalds
1
0.27%
1
14.29%
Total
368
100.00%
7
100.00%

/**
 *      z_comp_stats - return compression statistics for a compressor
 *              or decompressor.
 *      @arg:   pointer to private space for the (de)compressor
 *      @stats: pointer to a struct compstat to receive the result.
 */


static void z_comp_stats(void *arg, struct compstat *stats)
{
	struct ppp_deflate_state *state = (struct ppp_deflate_state *) arg;

	*stats = state->stats;
}

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Linus Torvalds (pre-git)
32
94.12%
1
50.00%
Paul Mackerras
2
5.88%
1
50.00%
Total
34
100.00%
2
100.00%

/**
 *      z_decomp_free - Free the memory used by a decompressor.
 *      @arg:   pointer to private space for the decompressor.
 */


static void z_decomp_free(void *arg)
{
	struct ppp_deflate_state *state = (struct ppp_deflate_state *) arg;

	if (state) {
		zlib_inflateEnd(&state->strm);
		vfree(state->strm.workspace);
		kfree(state);
	}
}

Contributors
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CommitProp
Linus Torvalds (pre-git)
39
78.00%
1
25.00%
Linus Torvalds
9
18.00%
1
25.00%
Paul Mackerras
1
2.00%
1
25.00%
David S. Miller
1
2.00%
1
25.00%
Total
50
100.00%
4
100.00%

/**
 *      z_decomp_alloc - allocate space for a decompressor.
 *      @options: pointer to CCP option data
 *      @opt_len: length of the CCP option at @options.
 *
 *      The @options pointer points to the a buffer containing the
 *      CCP option data for the compression being negotiated.  It is
 *      formatted according to RFC1979, and describes the window
 *      size that we are requesting the peer to use in compressing
 *      data to be sent to us.
 *
 *      Returns the pointer to the private state for the decompressor,
 *      or NULL if we could not allocate enough memory.
 */


static void *z_decomp_alloc(unsigned char *options, int opt_len)
{
	struct ppp_deflate_state *state;
	int w_size;

	if (opt_len != CILEN_DEFLATE ||
	    (options[0] != CI_DEFLATE && options[0] != CI_DEFLATE_DRAFT) ||
	    options[1] != CILEN_DEFLATE ||
	    DEFLATE_METHOD(options[2]) != DEFLATE_METHOD_VAL ||
	    options[3] != DEFLATE_CHK_SEQUENCE)
		return NULL;
	w_size = DEFLATE_SIZE(options[2]);
	if (w_size < DEFLATE_MIN_SIZE || w_size > DEFLATE_MAX_SIZE)
		return NULL;

	state = kzalloc(sizeof(*state), GFP_KERNEL);
	if (state == NULL)
		return NULL;

	state->w_size         = w_size;
	state->strm.next_out  = NULL;
	state->strm.workspace = vmalloc(zlib_inflate_workspacesize());
	if (state->strm.workspace == NULL)
		goto out_free;

	if (zlib_inflateInit2(&state->strm, -w_size) != Z_OK)
		goto out_free;
	return (void *) state;

out_free:
	z_decomp_free(state);
	return NULL;
}

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Linus Torvalds (pre-git)
172
90.05%
3
42.86%
Linus Torvalds
15
7.85%
1
14.29%
Paul Mackerras
2
1.05%
1
14.29%
Yoann Padioleau
1
0.52%
1
14.29%
David S. Miller
1
0.52%
1
14.29%
Total
191
100.00%
7
100.00%

/**
 *      z_decomp_init - initialize a previously-allocated decompressor.
 *      @arg:   pointer to the private state for the decompressor
 *      @options: pointer to the CCP option data describing the
 *              compression that was negotiated with the peer
 *      @opt_len: length of the CCP option data at @options
 *      @unit:  PPP unit number for diagnostic messages
 *      @hdrlen: ignored (present for backwards compatibility)
 *      @mru:   maximum length of decompressed packets
 *      @debug: debug flag; if non-zero, debug messages are printed.
 *
 *      The CCP options described by @options must match the options
 *      specified when the decompressor was allocated.  The decompressor
 *      history is reset.  Returns 0 for failure (CCP options don't
 *      match) or 1 for success.
 */


static int z_decomp_init(void *arg, unsigned char *options, int opt_len,
			 int unit, int hdrlen, int mru, int debug)
{
	struct ppp_deflate_state *state = (struct ppp_deflate_state *) arg;

	if (opt_len < CILEN_DEFLATE ||
	    (options[0] != CI_DEFLATE && options[0] != CI_DEFLATE_DRAFT) ||
	    options[1] != CILEN_DEFLATE ||
	    DEFLATE_METHOD(options[2]) != DEFLATE_METHOD_VAL ||
	    DEFLATE_SIZE(options[2]) != state->w_size ||
	    options[3] != DEFLATE_CHK_SEQUENCE)
		return 0;

	state->seqno = 0;
	state->unit  = unit;
	state->debug = debug;
	state->mru   = mru;

	zlib_inflateReset(&state->strm);

	return 1;
}

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Linus Torvalds (pre-git)
127
92.03%
2
50.00%
Paul Mackerras
10
7.25%
1
25.00%
Linus Torvalds
1
0.72%
1
25.00%
Total
138
100.00%
4
100.00%

/**
 *      z_decomp_reset - reset a previously-allocated decompressor.
 *      @arg:   pointer to private state for the decompressor.
 *
 *      This clears the history for the decompressor and makes it
 *      ready to receive a new compressed stream.
 */


static void z_decomp_reset(void *arg)
{
	struct ppp_deflate_state *state = (struct ppp_deflate_state *) arg;

	state->seqno = 0;
	zlib_inflateReset(&state->strm);
}

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Linus Torvalds (pre-git)
34
94.44%
1
33.33%
Linus Torvalds
1
2.78%
1
33.33%
Paul Mackerras
1
2.78%
1
33.33%
Total
36
100.00%
3
100.00%

/**
 *      z_decompress - decompress a Deflate-compressed packet.
 *      @arg:   pointer to private state for the decompressor
 *      @ibuf:  pointer to input (compressed) packet data
 *      @isize: length of input packet
 *      @obuf:  pointer to space for output (decompressed) packet
 *      @osize: amount of space available at @obuf
 *
 * Because of patent problems, we return DECOMP_ERROR for errors
 * found by inspecting the input data and for system problems, but
 * DECOMP_FATALERROR for any errors which could possibly be said to
 * be being detected "after" decompression.  For DECOMP_ERROR,
 * we can issue a CCP reset-request; for DECOMP_FATALERROR, we may be
 * infringing a patent of Motorola's if we do, so we take CCP down
 * instead.
 *
 * Given that the frame has the correct sequence number and a good FCS,
 * errors such as invalid codes in the input most likely indicate a
 * bug, so we return DECOMP_FATALERROR for them in order to turn off
 * compression, even though they are detected by inspecting the input.
 */


static int z_decompress(void *arg, unsigned char *ibuf, int isize,
		 unsigned char *obuf, int osize)
{
	struct ppp_deflate_state *state = (struct ppp_deflate_state *) arg;
	int olen, seq, r;
	int decode_proto, overflow;
	unsigned char overflow_buf[1];

	if (isize <= PPP_HDRLEN + DEFLATE_OVHD) {
		if (state->debug)
			printk(KERN_DEBUG "z_decompress%d: short pkt (%d)\n",
			       state->unit, isize);
		return DECOMP_ERROR;
	}

	/* Check the sequence number. */
	seq = get_unaligned_be16(ibuf + PPP_HDRLEN);
	if (seq != (state->seqno & 0xffff)) {
		if (state->debug)
			printk(KERN_DEBUG "z_decompress%d: bad seq # %d, expected %d\n",
			       state->unit, seq, state->seqno & 0xffff);
		return DECOMP_ERROR;
	}
	++state->seqno;

	/*
         * Fill in the first part of the PPP header.  The protocol field
         * comes from the decompressed data.
         */
	obuf[0] = PPP_ADDRESS(ibuf);
	obuf[1] = PPP_CONTROL(ibuf);
	obuf[2] = 0;

	/*
         * Set up to call inflate.  We set avail_out to 1 initially so we can
         * look at the first byte of the output and decide whether we have
         * a 1-byte or 2-byte protocol field.
         */
	state->strm.next_in = ibuf + PPP_HDRLEN + DEFLATE_OVHD;
	state->strm.avail_in = isize - (PPP_HDRLEN + DEFLATE_OVHD);
	state->strm.next_out = obuf + 3;
	state->strm.avail_out = 1;
	decode_proto = 1;
	overflow = 0;

	/*
         * Call inflate, supplying more input or output as needed.
         */
	for (;;) {
		r = zlib_inflate(&state->strm, Z_PACKET_FLUSH);
		if (r != Z_OK) {
			if (state->debug)
				printk(KERN_DEBUG "z_decompress%d: inflate returned %d (%s)\n",
				       state->unit, r, (state->strm.msg? state->strm.msg: ""));
			return DECOMP_FATALERROR;
		}
		if (state->strm.avail_out != 0)
			break;		/* all done */
		if (decode_proto) {
			state->strm.avail_out = osize - PPP_HDRLEN;
			if ((obuf[3] & 1) == 0) {
				/* 2-byte protocol field */
				obuf[2] = obuf[3];
				--state->strm.next_out;
				++state->strm.avail_out;
			}
			decode_proto = 0;
		} else if (!overflow) {
			/*
                         * We've filled up the output buffer; the only way to
                         * find out whether inflate has any more characters
                         * left is to give it another byte of output space.
                         */
			state->strm.next_out = overflow_buf;
			state->strm.avail_out = 1;
			overflow = 1;
		} else {
			if (state->debug)
				printk(KERN_DEBUG "z_decompress%d: ran out of mru\n",
				       state->unit);
			return DECOMP_FATALERROR;
		}
	}

	if (decode_proto) {
		if (state->debug)
			printk(KERN_DEBUG "z_decompress%d: didn't get proto\n",
			       state->unit);
		return DECOMP_ERROR;
	}

	olen = osize + overflow - state->strm.avail_out;
	state->stats.unc_bytes += olen;
	state->stats.unc_packets++;
	state->stats.comp_bytes += isize;
	state->stats.comp_packets++;

	return olen;
}

Contributors
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Linus Torvalds (pre-git)
466
96.48%
2
28.57%
Paul Mackerras
12
2.48%
2
28.57%
Changli Gao
3
0.62%
1
14.29%
Linus Torvalds
1
0.21%
1
14.29%
Stephen Hemminger
1
0.21%
1
14.29%
Total
483
100.00%
7
100.00%

/**
 *      z_incomp - add incompressible input data to the history.
 *      @arg:   pointer to private state for the decompressor
 *      @ibuf:  pointer to input packet data
 *      @icnt:  length of input data.
 */


static void z_incomp(void *arg, unsigned char *ibuf, int icnt)
{
	struct ppp_deflate_state *state = (struct ppp_deflate_state *) arg;
	int proto, r;

	/*
         * Check that the protocol is one we handle.
         */
	proto = PPP_PROTOCOL(ibuf);
	if (proto > 0x3fff || proto == 0xfd || proto == 0xfb)
		return;

	++state->seqno;

	/*
         * We start at the either the 1st or 2nd byte of the protocol field,
         * depending on whether the protocol value is compressible.
         */
	state->strm.next_in = ibuf + 3;
	state->strm.avail_in = icnt - 3;
	if (proto > 0xff) {
		--state->strm.next_in;
		++state->strm.avail_in;
	}

	r = zlib_inflateIncomp(&state->strm);
	if (r != Z_OK) {
		/* gak! */
		if (state->debug) {
			printk(KERN_DEBUG "z_incomp%d: inflateIncomp returned %d (%s)\n",
			       state->unit, r, (state->strm.msg? state->strm.msg: ""));
		}
		return;
	}

	/*
         * Update stats.
         */
	state->stats.inc_bytes += icnt;
	state->stats.inc_packets++;
	state->stats.unc_bytes += icnt;
	state->stats.unc_packets++;
}

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Linus Torvalds (pre-git)
189
97.93%
1
33.33%
Paul Mackerras
3
1.55%
1
33.33%
Linus Torvalds
1
0.52%
1
33.33%
Total
193
100.00%
3
100.00%

/*************************************************************
 * Module interface table
 *************************************************************/

/* These are in ppp_generic.c */
extern int  ppp_register_compressor   (struct compressor *cp);
extern void ppp_unregister_compressor (struct compressor *cp);

/*
 * Procedures exported to if_ppp.c.
 */

static struct compressor ppp_deflate = {
	.compress_proto =	CI_DEFLATE,
	.comp_alloc =		z_comp_alloc,
	.comp_free =		z_comp_free,
	.comp_init =		z_comp_init,
	.comp_reset =		z_comp_reset,
	.compress =		z_compress,
	.comp_stat =		z_comp_stats,
	.decomp_alloc =		z_decomp_alloc,
	.decomp_free =		z_decomp_free,
	.decomp_init =		z_decomp_init,
	.decomp_reset =		z_decomp_reset,
	.decompress =		z_decompress,
	.incomp =		z_incomp,
	.decomp_stat =		z_comp_stats,
	.owner =		THIS_MODULE
};


static struct compressor ppp_deflate_draft = {
	.compress_proto =	CI_DEFLATE_DRAFT,
	.comp_alloc =		z_comp_alloc,
	.comp_free =		z_comp_free,
	.comp_init =		z_comp_init,
	.comp_reset =		z_comp_reset,
	.compress =		z_compress,
	.comp_stat =		z_comp_stats,
	.decomp_alloc =		z_decomp_alloc,
	.decomp_free =		z_decomp_free,
	.decomp_init =		z_decomp_init,
	.decomp_reset =		z_decomp_reset,
	.decompress =		z_decompress,
	.incomp =		z_incomp,
	.decomp_stat =		z_comp_stats,
	.owner =		THIS_MODULE
};



static int __init deflate_init(void)
{
        int answer = ppp_register_compressor(&ppp_deflate);
        if (answer == 0)
                printk(KERN_INFO
		       "PPP Deflate Compression module registered\n");
	ppp_register_compressor(&ppp_deflate_draft);
        return answer;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Linus Torvalds (pre-git)
37
94.87%
3
60.00%
Linus Torvalds
1
2.56%
1
20.00%
Maximilian Attems
1
2.56%
1
20.00%
Total
39
100.00%
5
100.00%



static void __exit deflate_cleanup(void)
{
	ppp_unregister_compressor(&ppp_deflate);
	ppp_unregister_compressor(&ppp_deflate_draft);
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Linus Torvalds (pre-git)
19
90.48%
3
60.00%
Linus Torvalds
1
4.76%
1
20.00%
Maximilian Attems
1
4.76%
1
20.00%
Total
21
100.00%
5
100.00%


module_init(deflate_init);

module_exit(deflate_cleanup);
MODULE_LICENSE("Dual BSD/GPL");
MODULE_ALIAS("ppp-compress-" __stringify(CI_DEFLATE));
MODULE_ALIAS("ppp-compress-" __stringify(CI_DEFLATE_DRAFT));
Overall Contributors
Person
Tokens
Prop
Commits
CommitProp
Linus Torvalds (pre-git)
2099
85.15%
4
16.67%
Paul Mackerras
245
9.94%
5
20.83%
Linus Torvalds
59
2.39%
4
16.67%
Andrew Morton
18
0.73%
1
4.17%
Changli Gao
16
0.65%
1
4.17%
James Keniston
6
0.24%
1
4.17%
David Woodhouse
5
0.20%
1
4.17%
Florian Westphal
4
0.16%
1
4.17%
Muli Ben-Yehuda
3
0.12%
1
4.17%
Adrian Bunk
2
0.08%
1
4.17%
Yoann Padioleau
2
0.08%
1
4.17%
Maximilian Attems
2
0.08%
1
4.17%
Stephen Hemminger
2
0.08%
1
4.17%
David S. Miller
2
0.08%
1
4.17%
Total
2465
100.00%
24
100.00%
Directory: drivers/net/ppp

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