9737cd7203
Collection. To get encryption over a PPTP connection, you need the kernel to support the MPPE algorithm. It is used as a PPP compression module, and the mppe-lkm package provides a LKM (Loadable Kernel Module) that will install the functionality into your NetBSD kernel.
114 lines
3.2 KiB
C
114 lines
3.2 KiB
C
/* NetBSD */
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/*
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* Copyright (c) 1999 Darrin B. Jewell
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by Darrin B. Jewell
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* 4. The name of the author may not be used to endorse or promote products
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* derived from this software without specific prior written permission
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#include <sys/param.h>
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#include <sys/systm.h>
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#include <sys/conf.h>
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#include <sys/exec.h>
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#include <sys/lkm.h>
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#include <sys/tty.h>
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#include <sys/ttycom.h>
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MOD_MISC("mppe");
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extern struct compressor ppp_mppe;
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extern struct compressor *ppp_compressors[];
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extern int mppe_in_use;
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int mppe_lkmentry __P((struct lkm_table *, int, int));
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int mppe_lkm_load __P((struct lkm_table *, int));
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int
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mppe_lkm_load(lkmtp, cmd)
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struct lkm_table *lkmtp;
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int cmd;
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{
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int i;
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for(i=0;i<7;i++) {
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if (ppp_compressors[i] == NULL) {
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ppp_compressors[i] = &ppp_mppe;
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ppp_compressors[i+1] = NULL;
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break;
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}
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}
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if (i==7) {
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printf("MPPE: no free compressor slots\n");
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return ENODEV;
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}
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printf("MPPE: loaded into ppp at slot %d\n",i);
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return 0;
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}
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int
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mppe_lkm_unload(lkmtp, cmd)
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struct lkm_table *lkmtp;
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int cmd;
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{
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int i;
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if (mppe_in_use) {
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printf("MPPE: cannot unload lkm while in use (count=%d)\n",
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mppe_in_use);
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return EBUSY;
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}
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for(i=0;ppp_compressors[i];i++) {
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if (ppp_compressors[i] == &ppp_mppe) break;
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}
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if (ppp_compressors[i] == NULL) {
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printf("MPPE: cannot find mppe in ppp compressor slots\n");
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return ENODEV;
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}
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printf("MPPE: unloaded from ppp at slot %d\n",i);
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do {
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ppp_compressors[i] = ppp_compressors[i+1];
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} while(ppp_compressors[i++]);
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return 0;
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}
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int
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mppe_lkm_stat(lkmtp, cmd)
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struct lkm_table *lkmtp;
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int cmd;
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{
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printf("MPPE: use count %d\n",mppe_in_use);
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return 0;
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}
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int
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mppe_lkmentry(lkmtp, cmd, ver)
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struct lkm_table *lkmtp;
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int cmd, ver;
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{
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DISPATCH(lkmtp, cmd, ver, mppe_lkm_load,mppe_lkm_unload,mppe_lkm_stat);
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}
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