usr/src/uts/common/io/ppp/spppcomp/spppcomp_mod.c

   1 /*
   2  * spppcomp_mod.c - modload support for PPP compression STREAMS module.
   3  *
   4  * Copyright (c) 2011 Bayard G. Bell. All rights reserved.
   5  *
   6  * CONTRIBUTOR MAKES NO REPRESENTATION OR WARRANTIES ABOUT THE SUITABILITY
   7  * OF THE SOFTWARE, EITHER EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED
   8  * TO THE IMPLIED WARRANTIES OF MERCHANTABILITY, FITNESS FOR A
   9  * PARTICULAR PURPOSE, OR NON-INFRINGEMENT.  CONTRIBUTOR SHALL NOT BE LIABLE
  10  * FOR ANY DAMAGES SUFFERED BY LICENSEE AS A RESULT OF USING, MODIFYING OR
  11  * DISTRIBUTING THIS SOFTWARE OR ITS DERIVATIVES
  12  *
  13  * Copyright (c) 2000 by Sun Microsystems, Inc.
  14  * All rights reserved.
  15  *
  16  * Permission to use, copy, modify, and distribute this software and its
  17  * documentation is hereby granted, provided that the above copyright
  18  * notice appears in all copies.
  19  *
  20  * SUN MAKES NO REPRESENTATION OR WARRANTIES ABOUT THE SUITABILITY OF
  21  * THE SOFTWARE, EITHER EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED
  22  * TO THE IMPLIED WARRANTIES OF MERCHANTABILITY, FITNESS FOR A
  23  * PARTICULAR PURPOSE, OR NON-INFRINGEMENT.  SUN SHALL NOT BE LIABLE FOR
  24  * ANY DAMAGES SUFFERED BY LICENSEE AS A RESULT OF USING, MODIFYING OR
  25  * DISTRIBUTING THIS SOFTWARE OR ITS DERIVATIVES
  26  *
  27  * Copyright (c) 1994 The Australian National University.
  28  * All rights reserved.
  29  *
  30  * Permission to use, copy, modify, and distribute this software and its
  31  * documentation is hereby granted, provided that the above copyright
  32  * notice appears in all copies.  This software is provided without any
  33  * warranty, express or implied. The Australian National University
  34  * makes no representations about the suitability of this software for
  35  * any purpose.
  36  *
  37  * IN NO EVENT SHALL THE AUSTRALIAN NATIONAL UNIVERSITY BE LIABLE TO ANY
  38  * PARTY FOR DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES
  39  * ARISING OUT OF THE USE OF THIS SOFTWARE AND ITS DOCUMENTATION, EVEN IF
  40  * THE AUSTRALIAN NATIONAL UNIVERSITY HAVE BEEN ADVISED OF THE POSSIBILITY
  41  * OF SUCH DAMAGE.
  42  *
  43  * THE AUSTRALIAN NATIONAL UNIVERSITY SPECIFICALLY DISCLAIMS ANY WARRANTIES,
  44  * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY
  45  * AND FITNESS FOR A PARTICULAR PURPOSE.  THE SOFTWARE PROVIDED HEREUNDER IS
  46  * ON AN "AS IS" BASIS, AND THE AUSTRALIAN NATIONAL UNIVERSITY HAS NO
  47  * OBLIGATION TO PROVIDE MAINTENANCE, SUPPORT, UPDATES, ENHANCEMENTS,
  48  * OR MODIFICATIONS.
  49  *
  50  * This module is derived from the original SVR4 STREAMS PPP compression
  51  * module originally written by Paul Mackerras <paul.mackerras@cs.anu.edu.au>.
  52  *
  53  * James Carlson <james.d.carlson@sun.com> and Adi Masputra
  54  * <adi.masputra@sun.com> rewrote and restructured the code for improved
  55  * performance and scalability.
  56  */
  57
  58 #include <sys/types.h>
  59 #include <sys/syslog.h>
  60 #include <sys/conf.h>
  61 #include <sys/errno.h>
  62 #include <sys/ddi.h>
  63 #include <sys/conf.h>
  64 #include <sys/modctl.h>
  65 #include <net/pppio.h>
  66
  67 #include "s_common.h"
  68
  69 /*
  70  * Globals for PPP compression loadable module wrapper
  71  */
  72 extern struct streamtab spppcomp_tab;
  73 extern const char spppcomp_module_description[];
  74
  75 static struct fmodsw fsw = {
  76         COMP_MOD_NAME,                          /* f_name */
  77         &spppcomp_tab,                          /* f_str */
  78         D_NEW | D_MP | D_MTPERQ                 /* f_flag */
  79 };
  80
  81 static struct modlstrmod modlstrmod = {
  82         &mod_strmodops,                         /* strmod_modops */
  83         (char *)spppcomp_module_description,    /* strmod_linkinfo */
  84         &fsw                                    /* strmod_fmodsw */
  85 };
  86
  87 static struct modlinkage modlinkage = {
  88         MODREV_1,                       /* ml_rev, has to be MODREV_1 */
  89         (void *) &modlstrmod,           /* ml_linkage, NULL-terminated list */
  90         NULL                            /*  of linkage structures */
  91 };
  92
  93 int
  94 _init(void)
  95 {
  96         return (mod_install(&modlinkage));
  97 }
  98
  99 int
 100 _fini(void)
 101 {
 102         return (mod_remove(&modlinkage));
 103 }
 104
 105 int
 106 _info(struct modinfo *modinfop)
 107 {
 108         return (mod_info(&modlinkage, modinfop));
 109 }