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      1 /*
      2  * spppcomp_mod.c - modload support for PPP compression STREAMS module.
      3  *
      4  * Copyright (c) 2000 by Sun Microsystems, Inc.
      5  * All rights reserved.
      6  *
      7  * Permission to use, copy, modify, and distribute this software and its
      8  * documentation is hereby granted, provided that the above copyright
      9  * notice appears in all copies.
     10  *
     11  * SUN MAKES NO REPRESENTATION OR WARRANTIES ABOUT THE SUITABILITY OF
     12  * THE SOFTWARE, EITHER EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED
     13  * TO THE IMPLIED WARRANTIES OF MERCHANTABILITY, FITNESS FOR A
     14  * PARTICULAR PURPOSE, OR NON-INFRINGEMENT.  SUN SHALL NOT BE LIABLE FOR
     15  * ANY DAMAGES SUFFERED BY LICENSEE AS A RESULT OF USING, MODIFYING OR
     16  * DISTRIBUTING THIS SOFTWARE OR ITS DERIVATIVES
     17  *
     18  * Copyright (c) 1994 The Australian National University.
     19  * All rights reserved.
     20  *
     21  * Permission to use, copy, modify, and distribute this software and its
     22  * documentation is hereby granted, provided that the above copyright
     23  * notice appears in all copies.  This software is provided without any
     24  * warranty, express or implied. The Australian National University
     25  * makes no representations about the suitability of this software for
     26  * any purpose.
     27  *
     28  * IN NO EVENT SHALL THE AUSTRALIAN NATIONAL UNIVERSITY BE LIABLE TO ANY
     29  * PARTY FOR DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES
     30  * ARISING OUT OF THE USE OF THIS SOFTWARE AND ITS DOCUMENTATION, EVEN IF
     31  * THE AUSTRALIAN NATIONAL UNIVERSITY HAVE BEEN ADVISED OF THE POSSIBILITY
     32  * OF SUCH DAMAGE.
     33  *
     34  * THE AUSTRALIAN NATIONAL UNIVERSITY SPECIFICALLY DISCLAIMS ANY WARRANTIES,
     35  * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY
     36  * AND FITNESS FOR A PARTICULAR PURPOSE.  THE SOFTWARE PROVIDED HEREUNDER IS
     37  * ON AN "AS IS" BASIS, AND THE AUSTRALIAN NATIONAL UNIVERSITY HAS NO
     38  * OBLIGATION TO PROVIDE MAINTENANCE, SUPPORT, UPDATES, ENHANCEMENTS,
     39  * OR MODIFICATIONS.
     40  *
     41  * This module is derived from the original SVR4 STREAMS PPP compression
     42  * module originally written by Paul Mackerras <paul.mackerras (at) cs.anu.edu.au>.
     43  *
     44  * James Carlson <james.d.carlson (at) sun.com> and Adi Masputra
     45  * <adi.masputra (at) sun.com> rewrote and restructured the code for improved
     46  * performance and scalability.
     47  */
     48 
     49 #pragma ident	"%Z%%M%	%I%	%E% SMI"
     50 #define	RCSID	"$Id: spppcomp_mod.c,v 1.0 2000/05/08 01:10:12 masputra Exp $"
     51 
     52 #include <sys/types.h>
     53 #include <sys/syslog.h>
     54 #include <sys/conf.h>
     55 #include <sys/errno.h>
     56 #include <sys/ddi.h>
     57 #include <sys/conf.h>
     58 #include <sys/modctl.h>
     59 #include <net/pppio.h>
     60 
     61 #include "s_common.h"
     62 
     63 /*
     64  * Globals for PPP compression loadable module wrapper
     65  */
     66 char _depends_on[] = "drv/sppp";	/* we need some helper routines */
     67 extern struct streamtab spppcomp_tab;
     68 extern const char spppcomp_module_description[];
     69 
     70 static struct fmodsw fsw = {
     71 	COMP_MOD_NAME,				/* f_name */
     72 	&spppcomp_tab,				/* f_str */
     73 	D_NEW | D_MP | D_MTPERQ			/* f_flag */
     74 };
     75 
     76 static struct modlstrmod modlstrmod = {
     77 	&mod_strmodops,				/* strmod_modops */
     78 	(char *)spppcomp_module_description,	/* strmod_linkinfo */
     79 	&fsw					/* strmod_fmodsw */
     80 };
     81 
     82 static struct modlinkage modlinkage = {
     83 	MODREV_1,			/* ml_rev, has to be MODREV_1 */
     84 	(void *) &modlstrmod,		/* ml_linkage, NULL-terminated list */
     85 	NULL				/*  of linkage structures */
     86 };
     87 
     88 int
     89 _init(void)
     90 {
     91 	return (mod_install(&modlinkage));
     92 }
     93 
     94 int
     95 _fini(void)
     96 {
     97 	return (mod_remove(&modlinkage));
     98 }
     99 
    100 int
    101 _info(struct modinfo *modinfop)
    102 {
    103 	return (mod_info(&modlinkage, modinfop));
    104 }
    105