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jcastillo |
/* $Id: isdn_ppp.c,v 1.1 2005-12-20 10:16:56 jcastillo Exp $
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*
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* Linux ISDN subsystem, functions for synchronous PPP (linklevel).
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*
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* Copyright 1995,96 by Michael Hipp (Michael.Hipp@student.uni-tuebingen.de)
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2, or (at your option)
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* any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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*
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* $Log: not supported by cvs2svn $
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* Revision 1.1.1.1 2001/09/10 07:44:18 simons
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* Initial import
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*
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* Revision 1.1.1.1 2001/07/02 17:58:31 simons
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* Initial revision
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*
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* Revision 1.28.2.3 1998/12/30 17:49:00 paul
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* fixed syncPPP callback out
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*
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* Revision 1.28.2.2 1998/11/03 14:31:23 fritz
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* Reduced stack usage in various functions.
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* Adapted statemachine to work with certified HiSax.
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* Some fixes in callback handling.
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*
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* Revision 1.28.2.1 1998/03/16 09:56:02 cal
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* Merged in TimRu-patches. Still needs validation in conjunction with ABC-patches.
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*
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* Revision 1.28 1997/06/17 13:05:57 hipp
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* Applied Eric's underflow-patches (slightly modified)
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* more compression changes (but disabled at the moment)
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* changed one copy_to_user() to run with enabled IRQs
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* a few MP changes
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* changed 'proto' handling in the isdn_ppp receive code
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*
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* Revision 1.27 1997/03/30 16:51:17 calle
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* changed calls to copy_from_user/copy_to_user and removed verify_area
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* were possible.
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*
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* Revision 1.26 1997/02/23 16:53:44 hipp
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* minor cleanup
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* some initial changes for future PPP compresion
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* added AC,PC compression for outgoing frames
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*
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* Revision 1.25 1997/02/12 20:37:35 hipp
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* New ioctl() PPPIOCGCALLINFO, minor cleanup
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*
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* Revision 1.24 1997/02/11 18:32:56 fritz
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* Bugfix in isdn_ppp_free_mpqueue().
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*
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* Revision 1.23 1997/02/10 11:12:19 fritz
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* More changes for Kernel 2.1.X compatibility.
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*
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* Revision 1.22 1997/02/06 15:03:51 hipp
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* changed GFP_KERNEL kmalloc to GFP_ATOMIC in isdn_ppp_fill_mpqueue()
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*
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* Revision 1.21 1997/02/03 23:29:38 fritz
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* Reformatted according CodingStyle
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* Bugfix: removed isdn_ppp_skb_destructor, used by upper layers.
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* Misc changes for Kernel 2.1.X compatibility.
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*
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* Revision 1.20 1996/10/30 12:21:58 fritz
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* Cosmetic fix: Compiler warning when compiling without MPP.
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*
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* Revision 1.19 1996/10/25 19:03:21 hipp
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* changed/added some defines to (re)allow compilation without MP/VJ
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*
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* Revision 1.18 1996/10/22 23:14:00 fritz
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* Changes for compatibility to 2.0.X and 2.1.X kernels.
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*
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* Revision 1.17 1996/10/22 09:39:49 hipp
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* a few MP changes and bugfixes
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*
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* Revision 1.16 1996/09/23 01:58:10 fritz
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* Fix: With syncPPP encapsulation, discard LCP packets
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* when calculating hangup timeout.
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*
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* Revision 1.15 1996/09/07 12:50:12 hipp
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* bugfixes (unknown device after failed dial attempt, minor bugs)
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*
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* Revision 1.14 1996/08/12 16:26:47 hipp
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* code cleanup
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* changed connection management from minors to slots
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*
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* Revision 1.13 1996/07/01 19:47:24 hipp
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* Fixed memory leak in VJ handling and more VJ changes
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*
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* Revision 1.12 1996/06/24 17:42:03 fritz
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* Minor bugfixes.
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*
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* Revision 1.11 1996/06/16 17:46:05 tsbogend
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* changed unsigned long to u32 to make Alpha people happy
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*
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* Revision 1.10 1996/06/11 14:50:29 hipp
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* Lot of changes and bugfixes.
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* New scheme to resend packets to busy LL devices.
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*
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* Revision 1.9 1996/05/18 01:37:01 fritz
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* Added spelling corrections and some minor changes
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* to stay in sync with kernel.
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*
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* Revision 1.8 1996/05/06 11:34:55 hipp
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* fixed a few bugs
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*
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* Revision 1.7 1996/04/30 11:07:42 fritz
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* Added Michael's ippp-bind patch.
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*
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* Revision 1.6 1996/04/30 09:33:09 fritz
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* Removed compatibility-macros.
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*
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* Revision 1.5 1996/04/20 16:32:32 fritz
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* Changed ippp_table to an array of pointers, allocating each part
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* separately.
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*
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* Revision 1.4 1996/02/19 15:25:50 fritz
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* Bugfix: Sync-PPP packets got compressed twice, when resent due to
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* send-queue-full reject.
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*
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* Revision 1.3 1996/02/11 02:27:12 fritz
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* Lot of Bugfixes my Michael.
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* Moved calls to skb_push() into isdn_net_header()
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* Fixed a possible race-condition in isdn_ppp_timer_timeout().
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*
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* Revision 1.2 1996/01/22 05:08:06 fritz
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* Merged in Michael's patches for MP.
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* Minor changes in isdn_ppp_xmit.
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*
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* Revision 1.1 1996/01/09 04:11:29 fritz
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* Initial revision
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*
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*/
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/* TODO: right tbusy handling when using MP */
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/*
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* experimental for dynamic addressing: readdress IP frames
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*/
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#undef ISDN_SYNCPPP_READDRESS
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#include <linux/config.h>
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#define __NO_VERSION__
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#include <linux/module.h>
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#include <linux/version.h>
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#include <linux/isdn.h>
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#if (LINUX_VERSION_CODE >= 0x020117)
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#include <asm/poll.h>
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#endif
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#include "isdn_common.h"
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#include "isdn_ppp.h"
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#include "isdn_net.h"
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#ifndef PPP_IPX
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#define PPP_IPX 0x002b
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#endif
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/* set this if you use dynamic addressing */
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/* Prototypes */
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static int isdn_ppp_fill_rq(unsigned char *buf, int len, int proto, int slot);
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static int isdn_ppp_closewait(int slot);
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static void isdn_ppp_push_higher(isdn_net_dev * net_dev, isdn_net_local * lp,
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struct sk_buff *skb, int proto);
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static int isdn_ppp_if_get_unit(char *namebuf);
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static int isdn_ppp_set_compressor(struct ippp_struct *is,int num);
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static struct sk_buff *isdn_ppp_decompress(struct sk_buff *,
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struct ippp_struct *,struct ippp_struct *);
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static void isdn_ppp_receive_ccp(isdn_net_dev * net_dev, isdn_net_local * lp,
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struct sk_buff *skb);
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static struct sk_buff *isdn_ppp_compress(struct sk_buff *skb_in,int *proto,
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struct ippp_struct *is,struct ippp_struct *master,int type);
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#ifdef CONFIG_ISDN_MPP
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static int isdn_ppp_bundle(struct ippp_struct *, int unit);
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static void isdn_ppp_mask_queue(isdn_net_dev * dev, long mask);
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static void isdn_ppp_cleanup_mpqueue(isdn_net_dev * dev, long min);
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static void isdn_ppp_cleanup_sqqueue(isdn_net_dev * dev, isdn_net_local *, long min);
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static void isdn_ppp_free_sqqueue(isdn_net_dev *);
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static int isdn_ppp_fill_mpqueue(isdn_net_dev *, struct sk_buff **skb,
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int BEbyte, long *sqno, int min_sqno);
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static void isdn_ppp_free_mpqueue(isdn_net_dev *);
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#endif
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char *isdn_ppp_revision = "$Revision: 1.1 $";
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static struct ippp_struct *ippp_table[ISDN_MAX_CHANNELS];
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static struct isdn_ppp_compressor *ipc_head = NULL;
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extern int isdn_net_force_dial_lp(isdn_net_local *);
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/*
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* frame log (debug)
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*/
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static void
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isdn_ppp_frame_log(char *info, char *data, int len, int maxlen)
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{
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int cnt,
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j,
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i;
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char buf[80];
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if (len < maxlen)
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maxlen = len;
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for (i = 0, cnt = 0; cnt < maxlen; i++) {
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for (j = 0; j < 16 && cnt < maxlen; j++, cnt++)
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sprintf(buf + j * 3, "%02x ", (unsigned char) data[cnt]);
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printk(KERN_DEBUG "%s[%d]: %s\n", info, i, buf);
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}
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}
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/*
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* unbind isdn_net_local <=> ippp-device
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* note: it can happen, that we hangup/free the master before the slaves
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*/
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int
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isdn_ppp_free(isdn_net_local * lp)
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{
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#ifdef CONFIG_ISDN_MPP
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isdn_net_local *master_lp = lp;
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#endif
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unsigned long flags;
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struct ippp_struct *is;
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if (lp->ppp_slot < 0 || lp->ppp_slot > ISDN_MAX_CHANNELS)
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return 0;
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is = ippp_table[lp->ppp_slot];
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save_flags(flags);
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cli();
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#ifdef CONFIG_ISDN_MPP
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if (lp->master)
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master_lp = (isdn_net_local *) lp->master->priv;
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lp->last->next = lp->next;
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lp->next->last = lp->last;
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if (master_lp->netdev->queue == lp) {
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master_lp->netdev->queue = lp->next;
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if (lp->next == lp) { /* last link in queue? */
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master_lp->netdev->ib.bundled = 0;
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isdn_ppp_free_mpqueue(master_lp->netdev);
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isdn_ppp_free_sqqueue(master_lp->netdev);
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}
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}
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lp->next = lp->last = lp; /* (re)set own pointers */
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#endif
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if ((is->state & IPPP_CONNECT))
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isdn_ppp_closewait(lp->ppp_slot); /* force wakeup on ippp device */
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else if (is->state & IPPP_ASSIGNED)
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is->state = IPPP_OPEN; /* fallback to 'OPEN but not ASSIGEND' staet */
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if (is->debug & 0x1)
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printk(KERN_DEBUG "isdn_ppp_free %d %lx %lx\n", lp->ppp_slot, (long) lp, (long) is->lp);
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is->lp = NULL; /* link is down .. set lp to NULL */
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#ifdef ISDN_SYNCPPP_READDRESS
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is->old_pa_addr = 0x0;
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is->old_pa_dstaddr = 0x0;
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#endif
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lp->ppp_slot = -1; /* is this OK ?? */
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restore_flags(flags);
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return 0;
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}
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/*
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* bind isdn_net_local <=> ippp-device
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*/
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int
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isdn_ppp_bind(isdn_net_local * lp)
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{
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int i;
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int unit = 0;
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long flags;
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struct ippp_struct *is;
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if (lp->p_encap != ISDN_NET_ENCAP_SYNCPPP)
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return -1;
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save_flags(flags);
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cli();
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if (lp->pppbind < 0) { /* device bounded to ippp device ? */
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isdn_net_dev *net_dev = dev->netdev;
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char exclusive[ISDN_MAX_CHANNELS]; /* exclusive flags */
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memset(exclusive, 0, ISDN_MAX_CHANNELS);
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while (net_dev) { /* step through net devices to find exclusive minors */
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isdn_net_local *lp = &net_dev->local;
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if (lp->pppbind >= 0)
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exclusive[lp->pppbind] = 1;
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net_dev = net_dev->next;
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}
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/*
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* search a free device / slot
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*/
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| 308 |
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for (i = 0; i < ISDN_MAX_CHANNELS; i++) {
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if (ippp_table[i]->state == IPPP_OPEN && !exclusive[ippp_table[i]->minor]) { /* OPEN, but not connected! */
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break;
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}
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}
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} else {
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for (i = 0; i < ISDN_MAX_CHANNELS; i++)
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if (ippp_table[i]->minor == lp->pppbind &&
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|
|
(ippp_table[i]->state & IPPP_OPEN) == IPPP_OPEN)
|
| 317 |
|
|
break;
|
| 318 |
|
|
}
|
| 319 |
|
|
|
| 320 |
|
|
if (i >= ISDN_MAX_CHANNELS) {
|
| 321 |
|
|
restore_flags(flags);
|
| 322 |
|
|
printk(KERN_WARNING "isdn_ppp_bind: Can't find usable ippp device.\n");
|
| 323 |
|
|
return -1;
|
| 324 |
|
|
}
|
| 325 |
|
|
unit = isdn_ppp_if_get_unit(lp->name); /* get unit number from interface name .. ugly! */
|
| 326 |
|
|
if (unit < 0) {
|
| 327 |
|
|
printk(KERN_ERR "isdn_ppp_bind: illegal interface name %s.\n", lp->name);
|
| 328 |
|
|
return -1;
|
| 329 |
|
|
}
|
| 330 |
|
|
lp->ppp_slot = i;
|
| 331 |
|
|
is = ippp_table[i];
|
| 332 |
|
|
is->lp = lp;
|
| 333 |
|
|
is->unit = unit;
|
| 334 |
|
|
is->state = IPPP_OPEN | IPPP_ASSIGNED; /* assigned to a netdevice but not connected */
|
| 335 |
|
|
|
| 336 |
|
|
restore_flags(flags);
|
| 337 |
|
|
|
| 338 |
|
|
return lp->ppp_slot;
|
| 339 |
|
|
}
|
| 340 |
|
|
|
| 341 |
|
|
/*
|
| 342 |
|
|
* kick the ipppd on the device
|
| 343 |
|
|
* (wakes up daemon after B-channel connect)
|
| 344 |
|
|
*/
|
| 345 |
|
|
|
| 346 |
|
|
void
|
| 347 |
|
|
isdn_ppp_wakeup_daemon(isdn_net_local * lp)
|
| 348 |
|
|
{
|
| 349 |
|
|
if (lp->ppp_slot < 0 || lp->ppp_slot >= ISDN_MAX_CHANNELS)
|
| 350 |
|
|
return;
|
| 351 |
|
|
|
| 352 |
|
|
ippp_table[lp->ppp_slot]->state = IPPP_OPEN | IPPP_CONNECT | IPPP_NOBLOCK;
|
| 353 |
|
|
|
| 354 |
|
|
if (ippp_table[lp->ppp_slot]->wq)
|
| 355 |
|
|
wake_up_interruptible(&ippp_table[lp->ppp_slot]->wq);
|
| 356 |
|
|
}
|
| 357 |
|
|
|
| 358 |
|
|
/*
|
| 359 |
|
|
* there was a hangup on the netdevice
|
| 360 |
|
|
* force wakeup of the ippp device
|
| 361 |
|
|
* go into 'device waits for release' state
|
| 362 |
|
|
*/
|
| 363 |
|
|
static int
|
| 364 |
|
|
isdn_ppp_closewait(int slot)
|
| 365 |
|
|
{
|
| 366 |
|
|
struct ippp_struct *is;
|
| 367 |
|
|
|
| 368 |
|
|
if (slot < 0 || slot >= ISDN_MAX_CHANNELS)
|
| 369 |
|
|
return 0;
|
| 370 |
|
|
is = ippp_table[slot];
|
| 371 |
|
|
|
| 372 |
|
|
if (is->state && is->wq)
|
| 373 |
|
|
wake_up_interruptible(&is->wq);
|
| 374 |
|
|
|
| 375 |
|
|
is->state = IPPP_CLOSEWAIT;
|
| 376 |
|
|
return 1;
|
| 377 |
|
|
}
|
| 378 |
|
|
|
| 379 |
|
|
/*
|
| 380 |
|
|
* isdn_ppp_find_slot / isdn_ppp_free_slot
|
| 381 |
|
|
*/
|
| 382 |
|
|
|
| 383 |
|
|
static int
|
| 384 |
|
|
isdn_ppp_get_slot(void)
|
| 385 |
|
|
{
|
| 386 |
|
|
int i;
|
| 387 |
|
|
for (i = 0; i < ISDN_MAX_CHANNELS; i++) {
|
| 388 |
|
|
if (!ippp_table[i]->state)
|
| 389 |
|
|
return i;
|
| 390 |
|
|
}
|
| 391 |
|
|
return -1;
|
| 392 |
|
|
}
|
| 393 |
|
|
|
| 394 |
|
|
/*
|
| 395 |
|
|
* isdn_ppp_open
|
| 396 |
|
|
*/
|
| 397 |
|
|
|
| 398 |
|
|
int
|
| 399 |
|
|
isdn_ppp_open(int min, struct file *file)
|
| 400 |
|
|
{
|
| 401 |
|
|
int slot;
|
| 402 |
|
|
struct ippp_struct *is;
|
| 403 |
|
|
|
| 404 |
|
|
if (min < 0 || min > ISDN_MAX_CHANNELS)
|
| 405 |
|
|
return -ENODEV;
|
| 406 |
|
|
|
| 407 |
|
|
slot = isdn_ppp_get_slot();
|
| 408 |
|
|
if (slot < 0) {
|
| 409 |
|
|
return -EBUSY;
|
| 410 |
|
|
}
|
| 411 |
|
|
is = file->private_data = ippp_table[slot];
|
| 412 |
|
|
|
| 413 |
|
|
if (is->debug & 0x1)
|
| 414 |
|
|
printk(KERN_DEBUG "ippp, open, slot: %d, minor: %d, state: %04x\n", slot, min, is->state);
|
| 415 |
|
|
|
| 416 |
|
|
/* compression stuff */
|
| 417 |
|
|
is->compressor = NULL;
|
| 418 |
|
|
is->decomp_stat = is->comp_stat = NULL;
|
| 419 |
|
|
is->link_compressor = NULL;
|
| 420 |
|
|
is->link_decomp_stat = is->link_comp_stat = NULL;
|
| 421 |
|
|
|
| 422 |
|
|
is->lp = NULL;
|
| 423 |
|
|
is->mp_seqno = 0; /* MP sequence number */
|
| 424 |
|
|
is->pppcfg = 0; /* ppp configuration */
|
| 425 |
|
|
is->mpppcfg = 0; /* mppp configuration */
|
| 426 |
|
|
is->range = 0x1000000; /* MP: 24 bit range */
|
| 427 |
|
|
is->last_link_seqno = -1; /* MP: maybe set to Bundle-MIN, when joining a bundle ?? */
|
| 428 |
|
|
is->unit = -1; /* set, when we have our interface */
|
| 429 |
|
|
is->mru = 1524; /* MRU, default 1524 */
|
| 430 |
|
|
is->maxcid = 16; /* VJ: maxcid */
|
| 431 |
|
|
is->tk = current;
|
| 432 |
|
|
is->wq = NULL; /* read() wait queue */
|
| 433 |
|
|
is->wq1 = NULL; /* select() wait queue */
|
| 434 |
|
|
is->first = is->rq + NUM_RCV_BUFFS - 1; /* receive queue */
|
| 435 |
|
|
is->last = is->rq;
|
| 436 |
|
|
is->minor = min;
|
| 437 |
|
|
#ifdef CONFIG_ISDN_PPP_VJ
|
| 438 |
|
|
/*
|
| 439 |
|
|
* VJ header compression init
|
| 440 |
|
|
*/
|
| 441 |
|
|
is->slcomp = slhc_init(16, 16); /* not necessary for 2. link in bundle */
|
| 442 |
|
|
#endif
|
| 443 |
|
|
|
| 444 |
|
|
is->state = IPPP_OPEN;
|
| 445 |
|
|
|
| 446 |
|
|
return 0;
|
| 447 |
|
|
}
|
| 448 |
|
|
|
| 449 |
|
|
/*
|
| 450 |
|
|
* release ippp device
|
| 451 |
|
|
*/
|
| 452 |
|
|
void
|
| 453 |
|
|
isdn_ppp_release(int min, struct file *file)
|
| 454 |
|
|
{
|
| 455 |
|
|
int i;
|
| 456 |
|
|
struct ippp_struct *is;
|
| 457 |
|
|
|
| 458 |
|
|
if (min < 0 || min >= ISDN_MAX_CHANNELS)
|
| 459 |
|
|
return;
|
| 460 |
|
|
is = file->private_data;
|
| 461 |
|
|
|
| 462 |
|
|
if (is->debug & 0x1)
|
| 463 |
|
|
printk(KERN_DEBUG "ippp: release, minor: %d %lx\n", min, (long) is->lp);
|
| 464 |
|
|
|
| 465 |
|
|
if (is->lp) { /* a lp address says: this link is still up */
|
| 466 |
|
|
isdn_net_dev *p = is->lp->netdev;
|
| 467 |
|
|
|
| 468 |
|
|
is->state &= ~IPPP_CONNECT; /* -> effect: no call of wakeup */
|
| 469 |
|
|
/*
|
| 470 |
|
|
* isdn_net_hangup() calls isdn_ppp_free()
|
| 471 |
|
|
* isdn_ppp_free() sets is->lp to NULL and lp->ppp_slot to -1
|
| 472 |
|
|
* removing the IPPP_CONNECT flag omits calling of isdn_ppp_wakeup_daemon()
|
| 473 |
|
|
*/
|
| 474 |
|
|
isdn_net_hangup(&p->dev);
|
| 475 |
|
|
}
|
| 476 |
|
|
for (i = 0; i < NUM_RCV_BUFFS; i++) {
|
| 477 |
|
|
if (is->rq[i].buf) {
|
| 478 |
|
|
kfree(is->rq[i].buf);
|
| 479 |
|
|
is->rq[i].buf = NULL;
|
| 480 |
|
|
}
|
| 481 |
|
|
}
|
| 482 |
|
|
is->first = is->rq + NUM_RCV_BUFFS - 1; /* receive queue */
|
| 483 |
|
|
is->last = is->rq;
|
| 484 |
|
|
|
| 485 |
|
|
#ifdef CONFIG_ISDN_PPP_VJ
|
| 486 |
|
|
slhc_free(is->slcomp);
|
| 487 |
|
|
is->slcomp = NULL;
|
| 488 |
|
|
#endif
|
| 489 |
|
|
|
| 490 |
|
|
is->state = 0;
|
| 491 |
|
|
}
|
| 492 |
|
|
|
| 493 |
|
|
/*
|
| 494 |
|
|
* get_arg .. ioctl helper
|
| 495 |
|
|
*/
|
| 496 |
|
|
static int
|
| 497 |
|
|
get_arg(void *b, void *val, int len)
|
| 498 |
|
|
{
|
| 499 |
|
|
int r;
|
| 500 |
|
|
if (len <= 0)
|
| 501 |
|
|
len = sizeof(unsigned long);
|
| 502 |
|
|
if ((r = copy_from_user((void *) val, b, len)))
|
| 503 |
|
|
return r;
|
| 504 |
|
|
return 0;
|
| 505 |
|
|
}
|
| 506 |
|
|
|
| 507 |
|
|
/*
|
| 508 |
|
|
* set arg .. ioctl helper
|
| 509 |
|
|
*/
|
| 510 |
|
|
static int
|
| 511 |
|
|
set_arg(void *b, unsigned long val, void *str)
|
| 512 |
|
|
{
|
| 513 |
|
|
int r;
|
| 514 |
|
|
if (!str) {
|
| 515 |
|
|
if ((r = copy_to_user(b, (void *) &val, 4)))
|
| 516 |
|
|
return r;
|
| 517 |
|
|
} else {
|
| 518 |
|
|
if ((r = copy_to_user(b, str, val)))
|
| 519 |
|
|
return r;
|
| 520 |
|
|
}
|
| 521 |
|
|
return 0;
|
| 522 |
|
|
}
|
| 523 |
|
|
|
| 524 |
|
|
/*
|
| 525 |
|
|
* ippp device ioctl
|
| 526 |
|
|
*/
|
| 527 |
|
|
int
|
| 528 |
|
|
isdn_ppp_ioctl(int min, struct file *file, unsigned int cmd, unsigned long arg)
|
| 529 |
|
|
{
|
| 530 |
|
|
unsigned long val;
|
| 531 |
|
|
int num,r;
|
| 532 |
|
|
struct ippp_struct *is;
|
| 533 |
|
|
isdn_net_local *lp;
|
| 534 |
|
|
|
| 535 |
|
|
is = (struct ippp_struct *) file->private_data;
|
| 536 |
|
|
lp = is->lp;
|
| 537 |
|
|
|
| 538 |
|
|
if (is->debug & 0x1)
|
| 539 |
|
|
printk(KERN_DEBUG "isdn_ppp_ioctl: minor: %d cmd: %x state: %x\n", min, cmd, is->state);
|
| 540 |
|
|
|
| 541 |
|
|
if (!(is->state & IPPP_OPEN))
|
| 542 |
|
|
return -EINVAL;
|
| 543 |
|
|
|
| 544 |
|
|
switch (cmd) {
|
| 545 |
|
|
case PPPIOCBUNDLE:
|
| 546 |
|
|
#ifdef CONFIG_ISDN_MPP
|
| 547 |
|
|
if (!(is->state & IPPP_CONNECT))
|
| 548 |
|
|
return -EINVAL;
|
| 549 |
|
|
if ((r = get_arg((void *) arg, &val, 0)))
|
| 550 |
|
|
return r;
|
| 551 |
|
|
printk(KERN_DEBUG "iPPP-bundle: minor: %d, slave unit: %d, master unit: %d\n",
|
| 552 |
|
|
(int) min, (int) is->unit, (int) val);
|
| 553 |
|
|
return isdn_ppp_bundle(is, val);
|
| 554 |
|
|
#else
|
| 555 |
|
|
return -1;
|
| 556 |
|
|
#endif
|
| 557 |
|
|
break;
|
| 558 |
|
|
case PPPIOCGUNIT: /* get ppp/isdn unit number */
|
| 559 |
|
|
if ((r = set_arg((void *) arg, is->unit, NULL)))
|
| 560 |
|
|
return r;
|
| 561 |
|
|
break;
|
| 562 |
|
|
case PPPIOCGMPFLAGS: /* get configuration flags */
|
| 563 |
|
|
if ((r = set_arg((void *) arg, is->mpppcfg, NULL)))
|
| 564 |
|
|
return r;
|
| 565 |
|
|
break;
|
| 566 |
|
|
case PPPIOCSMPFLAGS: /* set configuration flags */
|
| 567 |
|
|
if ((r = get_arg((void *) arg, &val, 0)))
|
| 568 |
|
|
return r;
|
| 569 |
|
|
is->mpppcfg = val;
|
| 570 |
|
|
break;
|
| 571 |
|
|
case PPPIOCGFLAGS: /* get configuration flags */
|
| 572 |
|
|
if ((r = set_arg((void *) arg, is->pppcfg, NULL)))
|
| 573 |
|
|
return r;
|
| 574 |
|
|
break;
|
| 575 |
|
|
case PPPIOCSFLAGS: /* set configuration flags */
|
| 576 |
|
|
if ((r = get_arg((void *) arg, &val, 0))) {
|
| 577 |
|
|
return r;
|
| 578 |
|
|
}
|
| 579 |
|
|
if (val & SC_ENABLE_IP && !(is->pppcfg & SC_ENABLE_IP) && (is->state & IPPP_CONNECT)) {
|
| 580 |
|
|
if (lp) {
|
| 581 |
|
|
lp->netdev->dev.tbusy = 0;
|
| 582 |
|
|
mark_bh(NET_BH); /* OK .. we are ready to send buffers */
|
| 583 |
|
|
}
|
| 584 |
|
|
}
|
| 585 |
|
|
is->pppcfg = val;
|
| 586 |
|
|
break;
|
| 587 |
|
|
#if 0
|
| 588 |
|
|
case PPPIOCGSTAT: /* read PPP statistic information */
|
| 589 |
|
|
break;
|
| 590 |
|
|
#endif
|
| 591 |
|
|
case PPPIOCGIDLE: /* get idle time information */
|
| 592 |
|
|
if (lp) {
|
| 593 |
|
|
struct ppp_idle pidle;
|
| 594 |
|
|
pidle.xmit_idle = pidle.recv_idle = lp->huptimer;
|
| 595 |
|
|
if ((r = set_arg((void *) arg, sizeof(struct ppp_idle), &pidle)))
|
| 596 |
|
|
return r;
|
| 597 |
|
|
}
|
| 598 |
|
|
break;
|
| 599 |
|
|
case PPPIOCSMRU: /* set receive unit size for PPP */
|
| 600 |
|
|
if ((r = get_arg((void *) arg, &val, 0)))
|
| 601 |
|
|
return r;
|
| 602 |
|
|
is->mru = val;
|
| 603 |
|
|
break;
|
| 604 |
|
|
case PPPIOCSMPMRU:
|
| 605 |
|
|
break;
|
| 606 |
|
|
case PPPIOCSMPMTU:
|
| 607 |
|
|
break;
|
| 608 |
|
|
case PPPIOCSMAXCID: /* set the maximum compression slot id */
|
| 609 |
|
|
if ((r = get_arg((void *) arg, &val, 0)))
|
| 610 |
|
|
return r;
|
| 611 |
|
|
val++;
|
| 612 |
|
|
if (is->maxcid != val) {
|
| 613 |
|
|
#ifdef CONFIG_ISDN_PPP_VJ
|
| 614 |
|
|
struct slcompress *sltmp;
|
| 615 |
|
|
#endif
|
| 616 |
|
|
if (is->debug & 0x1)
|
| 617 |
|
|
printk(KERN_DEBUG "ippp, ioctl: changed MAXCID to %ld\n", val);
|
| 618 |
|
|
is->maxcid = val;
|
| 619 |
|
|
#ifdef CONFIG_ISDN_PPP_VJ
|
| 620 |
|
|
sltmp = slhc_init(16, val);
|
| 621 |
|
|
if (!sltmp) {
|
| 622 |
|
|
printk(KERN_ERR "ippp, can't realloc slhc struct\n");
|
| 623 |
|
|
return -ENOMEM;
|
| 624 |
|
|
}
|
| 625 |
|
|
if (is->slcomp)
|
| 626 |
|
|
slhc_free(is->slcomp);
|
| 627 |
|
|
is->slcomp = sltmp;
|
| 628 |
|
|
#endif
|
| 629 |
|
|
}
|
| 630 |
|
|
break;
|
| 631 |
|
|
case PPPIOCGDEBUG:
|
| 632 |
|
|
if ((r = set_arg((void *) arg, is->debug, 0)))
|
| 633 |
|
|
return r;
|
| 634 |
|
|
break;
|
| 635 |
|
|
case PPPIOCSDEBUG:
|
| 636 |
|
|
if ((r = get_arg((void *) arg, &val, 0)))
|
| 637 |
|
|
return r;
|
| 638 |
|
|
is->debug = val;
|
| 639 |
|
|
break;
|
| 640 |
|
|
case PPPIOCGCOMPRESSORS:
|
| 641 |
|
|
{
|
| 642 |
|
|
unsigned long protos = 0;
|
| 643 |
|
|
struct isdn_ppp_compressor *ipc = ipc_head;
|
| 644 |
|
|
while(ipc) {
|
| 645 |
|
|
protos |= (0x1<<ipc->num);
|
| 646 |
|
|
ipc = ipc->next;
|
| 647 |
|
|
}
|
| 648 |
|
|
if ((r = set_arg((void *) arg, protos, 0)))
|
| 649 |
|
|
return r;
|
| 650 |
|
|
}
|
| 651 |
|
|
break;
|
| 652 |
|
|
case PPPIOCSCOMPRESSOR:
|
| 653 |
|
|
if ((r = get_arg((void *) arg, &num, sizeof(int))))
|
| 654 |
|
|
return r;
|
| 655 |
|
|
return isdn_ppp_set_compressor(is, num);
|
| 656 |
|
|
break;
|
| 657 |
|
|
case PPPIOCGCALLINFO:
|
| 658 |
|
|
{
|
| 659 |
|
|
struct pppcallinfo *pci;
|
| 660 |
|
|
|
| 661 |
|
|
if ((pci = (struct pppcallinfo *)kmalloc(sizeof(struct pppcallinfo), GFP_KERNEL)) == NULL)
|
| 662 |
|
|
return -ENOMEM;
|
| 663 |
|
|
memset((char *) pci,0,sizeof(struct pppcallinfo));
|
| 664 |
|
|
if(lp)
|
| 665 |
|
|
{
|
| 666 |
|
|
strncpy(pci->local_num,lp->msn,63);
|
| 667 |
|
|
if(lp->dial) {
|
| 668 |
|
|
strncpy(pci->remote_num,lp->dial->num,63);
|
| 669 |
|
|
}
|
| 670 |
|
|
pci->charge_units = lp->charge;
|
| 671 |
|
|
if(lp->outgoing)
|
| 672 |
|
|
pci->calltype = CALLTYPE_OUTGOING;
|
| 673 |
|
|
else
|
| 674 |
|
|
pci->calltype = CALLTYPE_INCOMING;
|
| 675 |
|
|
if(lp->flags & ISDN_NET_CALLBACK)
|
| 676 |
|
|
pci->calltype |= CALLTYPE_CALLBACK;
|
| 677 |
|
|
}
|
| 678 |
|
|
r = set_arg((void *)arg,sizeof(struct pppcallinfo),pci);
|
| 679 |
|
|
kfree(pci);
|
| 680 |
|
|
return r;
|
| 681 |
|
|
}
|
| 682 |
|
|
default:
|
| 683 |
|
|
break;
|
| 684 |
|
|
}
|
| 685 |
|
|
return 0;
|
| 686 |
|
|
}
|
| 687 |
|
|
|
| 688 |
|
|
#if (LINUX_VERSION_CODE < 0x020117)
|
| 689 |
|
|
int
|
| 690 |
|
|
isdn_ppp_select(int min, struct file *file, int type, select_table * st)
|
| 691 |
|
|
{
|
| 692 |
|
|
struct ippp_buf_queue *bf,
|
| 693 |
|
|
*bl;
|
| 694 |
|
|
unsigned long flags;
|
| 695 |
|
|
struct ippp_struct *is;
|
| 696 |
|
|
|
| 697 |
|
|
is = file->private_data;
|
| 698 |
|
|
|
| 699 |
|
|
if (is->debug & 0x2)
|
| 700 |
|
|
printk(KERN_DEBUG "isdn_ppp_select: minor: %d, type: %d \n", min, type);
|
| 701 |
|
|
|
| 702 |
|
|
if (!(is->state & IPPP_OPEN))
|
| 703 |
|
|
return -EINVAL;
|
| 704 |
|
|
|
| 705 |
|
|
switch (type) {
|
| 706 |
|
|
case SEL_IN:
|
| 707 |
|
|
save_flags(flags);
|
| 708 |
|
|
cli();
|
| 709 |
|
|
bl = is->last;
|
| 710 |
|
|
bf = is->first;
|
| 711 |
|
|
/*
|
| 712 |
|
|
* if IPPP_NOBLOCK is set we return even if we have nothing to read
|
| 713 |
|
|
*/
|
| 714 |
|
|
if (bf->next == bl && !(is->state & IPPP_NOBLOCK)) {
|
| 715 |
|
|
select_wait(&is->wq, st);
|
| 716 |
|
|
restore_flags(flags);
|
| 717 |
|
|
return 0;
|
| 718 |
|
|
}
|
| 719 |
|
|
is->state &= ~IPPP_NOBLOCK;
|
| 720 |
|
|
restore_flags(flags);
|
| 721 |
|
|
return 1;
|
| 722 |
|
|
case SEL_OUT:
|
| 723 |
|
|
/* we're always ready to send .. */
|
| 724 |
|
|
return 1;
|
| 725 |
|
|
case SEL_EX:
|
| 726 |
|
|
select_wait(&is->wq1, st);
|
| 727 |
|
|
return 0;
|
| 728 |
|
|
}
|
| 729 |
|
|
return 1;
|
| 730 |
|
|
}
|
| 731 |
|
|
#else
|
| 732 |
|
|
unsigned int
|
| 733 |
|
|
isdn_ppp_poll(struct file *file, poll_table * wait)
|
| 734 |
|
|
{
|
| 735 |
|
|
unsigned int mask;
|
| 736 |
|
|
struct ippp_buf_queue *bf;
|
| 737 |
|
|
struct ippp_buf_queue *bl;
|
| 738 |
|
|
unsigned long flags;
|
| 739 |
|
|
struct ippp_struct *is;
|
| 740 |
|
|
|
| 741 |
|
|
is = file->private_data;
|
| 742 |
|
|
|
| 743 |
|
|
if (is->debug & 0x2)
|
| 744 |
|
|
printk(KERN_DEBUG "isdn_ppp_poll: minor: %d\n", MINOR(file->f_inode->i_rdev));
|
| 745 |
|
|
|
| 746 |
|
|
poll_wait(&is->wq, wait);
|
| 747 |
|
|
|
| 748 |
|
|
if (!(is->state & IPPP_OPEN)) {
|
| 749 |
|
|
printk(KERN_DEBUG "isdn_ppp: device not open\n");
|
| 750 |
|
|
return POLLERR;
|
| 751 |
|
|
}
|
| 752 |
|
|
/* we're always ready to send .. */
|
| 753 |
|
|
mask = POLLOUT | POLLWRNORM;
|
| 754 |
|
|
|
| 755 |
|
|
save_flags(flags);
|
| 756 |
|
|
cli();
|
| 757 |
|
|
bl = is->last;
|
| 758 |
|
|
bf = is->first;
|
| 759 |
|
|
/*
|
| 760 |
|
|
* if IPPP_NOBLOCK is set we return even if we have nothing to read
|
| 761 |
|
|
*/
|
| 762 |
|
|
if (bf->next != bl || (is->state & IPPP_NOBLOCK)) {
|
| 763 |
|
|
is->state &= ~IPPP_NOBLOCK;
|
| 764 |
|
|
mask |= POLLIN | POLLRDNORM;
|
| 765 |
|
|
}
|
| 766 |
|
|
restore_flags(flags);
|
| 767 |
|
|
return mask;
|
| 768 |
|
|
}
|
| 769 |
|
|
#endif
|
| 770 |
|
|
|
| 771 |
|
|
|
| 772 |
|
|
/*
|
| 773 |
|
|
* fill up isdn_ppp_read() queue ..
|
| 774 |
|
|
*/
|
| 775 |
|
|
|
| 776 |
|
|
static int
|
| 777 |
|
|
isdn_ppp_fill_rq(unsigned char *buf, int len, int proto, int slot)
|
| 778 |
|
|
{
|
| 779 |
|
|
struct ippp_buf_queue *bf,
|
| 780 |
|
|
*bl;
|
| 781 |
|
|
unsigned long flags;
|
| 782 |
|
|
unsigned char *nbuf;
|
| 783 |
|
|
struct ippp_struct *is;
|
| 784 |
|
|
|
| 785 |
|
|
if (slot < 0 || slot >= ISDN_MAX_CHANNELS) {
|
| 786 |
|
|
printk(KERN_WARNING "ippp: illegal slot.\n");
|
| 787 |
|
|
return 0;
|
| 788 |
|
|
}
|
| 789 |
|
|
is = ippp_table[slot];
|
| 790 |
|
|
|
| 791 |
|
|
if (!(is->state & IPPP_CONNECT)) {
|
| 792 |
|
|
printk(KERN_DEBUG "ippp: device not activated.\n");
|
| 793 |
|
|
return 0;
|
| 794 |
|
|
}
|
| 795 |
|
|
nbuf = (unsigned char *) kmalloc(len + 4, GFP_ATOMIC);
|
| 796 |
|
|
if (!nbuf) {
|
| 797 |
|
|
printk(KERN_WARNING "ippp: Can't alloc buf\n");
|
| 798 |
|
|
return 0;
|
| 799 |
|
|
}
|
| 800 |
|
|
nbuf[0] = PPP_ALLSTATIONS;
|
| 801 |
|
|
nbuf[1] = PPP_UI;
|
| 802 |
|
|
nbuf[2] = proto >> 8;
|
| 803 |
|
|
nbuf[3] = proto & 0xff;
|
| 804 |
|
|
memcpy(nbuf + 4, buf, len);
|
| 805 |
|
|
|
| 806 |
|
|
save_flags(flags);
|
| 807 |
|
|
cli();
|
| 808 |
|
|
|
| 809 |
|
|
bf = is->first;
|
| 810 |
|
|
bl = is->last;
|
| 811 |
|
|
|
| 812 |
|
|
if (bf == bl) {
|
| 813 |
|
|
printk(KERN_WARNING "ippp: Queue is full; discarding first buffer\n");
|
| 814 |
|
|
bf = bf->next;
|
| 815 |
|
|
kfree(bf->buf);
|
| 816 |
|
|
is->first = bf;
|
| 817 |
|
|
}
|
| 818 |
|
|
bl->buf = (char *) nbuf;
|
| 819 |
|
|
bl->len = len + 4;
|
| 820 |
|
|
|
| 821 |
|
|
is->last = bl->next;
|
| 822 |
|
|
restore_flags(flags);
|
| 823 |
|
|
|
| 824 |
|
|
if (is->wq)
|
| 825 |
|
|
wake_up_interruptible(&is->wq);
|
| 826 |
|
|
|
| 827 |
|
|
return len;
|
| 828 |
|
|
}
|
| 829 |
|
|
|
| 830 |
|
|
/*
|
| 831 |
|
|
* read() .. non-blocking: ipppd calls it only after select()
|
| 832 |
|
|
* reports, that there is data
|
| 833 |
|
|
*/
|
| 834 |
|
|
|
| 835 |
|
|
int
|
| 836 |
|
|
isdn_ppp_read(int min, struct file *file, char *buf, int count)
|
| 837 |
|
|
{
|
| 838 |
|
|
struct ippp_struct *is;
|
| 839 |
|
|
struct ippp_buf_queue *b;
|
| 840 |
|
|
int r;
|
| 841 |
|
|
unsigned long flags;
|
| 842 |
|
|
unsigned char *save_buf;
|
| 843 |
|
|
|
| 844 |
|
|
is = file->private_data;
|
| 845 |
|
|
|
| 846 |
|
|
if (!(is->state & IPPP_OPEN))
|
| 847 |
|
|
return 0;
|
| 848 |
|
|
|
| 849 |
|
|
if ((r = verify_area(VERIFY_WRITE, (void *) buf, count)))
|
| 850 |
|
|
return r;
|
| 851 |
|
|
|
| 852 |
|
|
save_flags(flags);
|
| 853 |
|
|
cli();
|
| 854 |
|
|
|
| 855 |
|
|
b = is->first->next;
|
| 856 |
|
|
save_buf = b->buf;
|
| 857 |
|
|
if (!save_buf) {
|
| 858 |
|
|
restore_flags(flags);
|
| 859 |
|
|
return -EAGAIN;
|
| 860 |
|
|
}
|
| 861 |
|
|
if (b->len < count)
|
| 862 |
|
|
count = b->len;
|
| 863 |
|
|
b->buf = NULL;
|
| 864 |
|
|
is->first = b;
|
| 865 |
|
|
|
| 866 |
|
|
restore_flags(flags);
|
| 867 |
|
|
|
| 868 |
|
|
copy_to_user(buf, save_buf, count);
|
| 869 |
|
|
kfree(save_buf);
|
| 870 |
|
|
|
| 871 |
|
|
return count;
|
| 872 |
|
|
}
|
| 873 |
|
|
|
| 874 |
|
|
/*
|
| 875 |
|
|
* ipppd wanna write a packet to the card .. non-blocking
|
| 876 |
|
|
*/
|
| 877 |
|
|
|
| 878 |
|
|
int
|
| 879 |
|
|
isdn_ppp_write(int min, struct file *file, const char *buf, int count)
|
| 880 |
|
|
{
|
| 881 |
|
|
isdn_net_local *lp;
|
| 882 |
|
|
struct ippp_struct *is;
|
| 883 |
|
|
int proto;
|
| 884 |
|
|
unsigned char protobuf[4];
|
| 885 |
|
|
|
| 886 |
|
|
is = file->private_data;
|
| 887 |
|
|
|
| 888 |
|
|
if (!(is->state & IPPP_CONNECT))
|
| 889 |
|
|
return 0;
|
| 890 |
|
|
|
| 891 |
|
|
lp = is->lp;
|
| 892 |
|
|
|
| 893 |
|
|
/* -> push it directly to the lowlevel interface */
|
| 894 |
|
|
|
| 895 |
|
|
if (!lp)
|
| 896 |
|
|
printk(KERN_DEBUG "isdn_ppp_write: lp == NULL\n");
|
| 897 |
|
|
else {
|
| 898 |
|
|
/*
|
| 899 |
|
|
* Don't reset huptimer for
|
| 900 |
|
|
* LCP packets. (Echo requests).
|
| 901 |
|
|
*/
|
| 902 |
|
|
if (copy_from_user(protobuf, buf, 4))
|
| 903 |
|
|
return -EFAULT;
|
| 904 |
|
|
proto = PPP_PROTOCOL(protobuf);
|
| 905 |
|
|
if (proto != PPP_LCP)
|
| 906 |
|
|
lp->huptimer = 0;
|
| 907 |
|
|
|
| 908 |
|
|
if (lp->isdn_device < 0 || lp->isdn_channel < 0)
|
| 909 |
|
|
return 0;
|
| 910 |
|
|
|
| 911 |
|
|
if ((dev->drv[lp->isdn_device]->flags & DRV_FLAG_RUNNING) &&
|
| 912 |
|
|
lp->dialstate == 0 &&
|
| 913 |
|
|
(lp->flags & ISDN_NET_CONNECTED)) {
|
| 914 |
|
|
int cnt;
|
| 915 |
|
|
struct sk_buff *skb;
|
| 916 |
|
|
skb = dev_alloc_skb(count);
|
| 917 |
|
|
if (!skb) {
|
| 918 |
|
|
printk(KERN_WARNING "isdn_ppp_write: out of memory!\n");
|
| 919 |
|
|
return count;
|
| 920 |
|
|
}
|
| 921 |
|
|
SET_SKB_FREE(skb);
|
| 922 |
|
|
if (copy_from_user(skb_put(skb, count), buf, count))
|
| 923 |
|
|
return -EFAULT;
|
| 924 |
|
|
if (is->debug & 0x40) {
|
| 925 |
|
|
printk(KERN_DEBUG "ppp xmit: len %d\n", (int) skb->len);
|
| 926 |
|
|
isdn_ppp_frame_log("xmit", skb->data, skb->len, 32);
|
| 927 |
|
|
}
|
| 928 |
|
|
|
| 929 |
|
|
if ((cnt = isdn_writebuf_skb_stub(lp->isdn_device, lp->isdn_channel, skb)) != count) {
|
| 930 |
|
|
if (lp->sav_skb) {
|
| 931 |
|
|
dev_kfree_skb(lp->sav_skb, FREE_WRITE);
|
| 932 |
|
|
printk(KERN_INFO "isdn_ppp_write: freeing sav_skb (%d,%d)!\n", cnt, count);
|
| 933 |
|
|
} else
|
| 934 |
|
|
printk(KERN_INFO "isdn_ppp_write: Can't write PPP frame to LL (%d,%d)!\n", cnt, count);
|
| 935 |
|
|
lp->sav_skb = skb;
|
| 936 |
|
|
}
|
| 937 |
|
|
}
|
| 938 |
|
|
}
|
| 939 |
|
|
return count;
|
| 940 |
|
|
}
|
| 941 |
|
|
|
| 942 |
|
|
/*
|
| 943 |
|
|
* init memory, structures etc.
|
| 944 |
|
|
*/
|
| 945 |
|
|
|
| 946 |
|
|
int
|
| 947 |
|
|
isdn_ppp_init(void)
|
| 948 |
|
|
{
|
| 949 |
|
|
int i,
|
| 950 |
|
|
j;
|
| 951 |
|
|
|
| 952 |
|
|
for (i = 0; i < ISDN_MAX_CHANNELS; i++) {
|
| 953 |
|
|
if (!(ippp_table[i] = (struct ippp_struct *)
|
| 954 |
|
|
kmalloc(sizeof(struct ippp_struct), GFP_KERNEL))) {
|
| 955 |
|
|
printk(KERN_WARNING "isdn_ppp_init: Could not alloc ippp_table\n");
|
| 956 |
|
|
for (j = 0; j < i; j++)
|
| 957 |
|
|
kfree(ippp_table[i]);
|
| 958 |
|
|
return -1;
|
| 959 |
|
|
}
|
| 960 |
|
|
memset((char *) ippp_table[i], 0, sizeof(struct ippp_struct));
|
| 961 |
|
|
ippp_table[i]->state = 0;
|
| 962 |
|
|
ippp_table[i]->first = ippp_table[i]->rq + NUM_RCV_BUFFS - 1;
|
| 963 |
|
|
ippp_table[i]->last = ippp_table[i]->rq;
|
| 964 |
|
|
|
| 965 |
|
|
for (j = 0; j < NUM_RCV_BUFFS; j++) {
|
| 966 |
|
|
ippp_table[i]->rq[j].buf = NULL;
|
| 967 |
|
|
ippp_table[i]->rq[j].last = ippp_table[i]->rq +
|
| 968 |
|
|
(NUM_RCV_BUFFS + j - 1) % NUM_RCV_BUFFS;
|
| 969 |
|
|
ippp_table[i]->rq[j].next = ippp_table[i]->rq + (j + 1) % NUM_RCV_BUFFS;
|
| 970 |
|
|
}
|
| 971 |
|
|
}
|
| 972 |
|
|
return 0;
|
| 973 |
|
|
}
|
| 974 |
|
|
|
| 975 |
|
|
void
|
| 976 |
|
|
isdn_ppp_cleanup(void)
|
| 977 |
|
|
{
|
| 978 |
|
|
int i;
|
| 979 |
|
|
|
| 980 |
|
|
for (i = 0; i < ISDN_MAX_CHANNELS; i++)
|
| 981 |
|
|
kfree(ippp_table[i]);
|
| 982 |
|
|
}
|
| 983 |
|
|
|
| 984 |
|
|
/*
|
| 985 |
|
|
* get the PPP protocol header and pull skb
|
| 986 |
|
|
*/
|
| 987 |
|
|
static int isdn_ppp_strip_proto(struct sk_buff *skb)
|
| 988 |
|
|
{
|
| 989 |
|
|
int proto;
|
| 990 |
|
|
if (skb->data[0] & 0x1) {
|
| 991 |
|
|
proto = skb->data[0];
|
| 992 |
|
|
skb_pull(skb, 1); /* protocol ID is only 8 bit */
|
| 993 |
|
|
} else {
|
| 994 |
|
|
proto = ((int) skb->data[0] << 8) + skb->data[1];
|
| 995 |
|
|
skb_pull(skb, 2);
|
| 996 |
|
|
}
|
| 997 |
|
|
return proto;
|
| 998 |
|
|
}
|
| 999 |
|
|
|
| 1000 |
|
|
|
| 1001 |
|
|
/*
|
| 1002 |
|
|
* handler for incoming packets on a syncPPP interface
|
| 1003 |
|
|
*/
|
| 1004 |
|
|
void isdn_ppp_receive(isdn_net_dev * net_dev, isdn_net_local * lp, struct sk_buff *skb)
|
| 1005 |
|
|
{
|
| 1006 |
|
|
struct ippp_struct *is;
|
| 1007 |
|
|
int proto;
|
| 1008 |
|
|
|
| 1009 |
|
|
is = ippp_table[lp->ppp_slot];
|
| 1010 |
|
|
|
| 1011 |
|
|
if (is->debug & 0x4) {
|
| 1012 |
|
|
printk(KERN_DEBUG "ippp_receive: len: %d\n", (int) skb->len);
|
| 1013 |
|
|
isdn_ppp_frame_log("receive", skb->data, skb->len, 32);
|
| 1014 |
|
|
}
|
| 1015 |
|
|
if (net_dev->local.master) {
|
| 1016 |
|
|
printk(KERN_WARNING "isdn_ppp_receice: net_dev != master\n");
|
| 1017 |
|
|
net_dev = ((isdn_net_local *) net_dev->local.master->priv)->netdev;
|
| 1018 |
|
|
}
|
| 1019 |
|
|
if (skb->data[0] == 0xff && skb->data[1] == 0x03)
|
| 1020 |
|
|
skb_pull(skb, 2);
|
| 1021 |
|
|
else if (is->pppcfg & SC_REJ_COMP_AC) {
|
| 1022 |
|
|
SET_SKB_FREE(skb);
|
| 1023 |
|
|
dev_kfree_skb(skb, 0 /* FREE_READ */ );
|
| 1024 |
|
|
return; /* discard it silently */
|
| 1025 |
|
|
}
|
| 1026 |
|
|
|
| 1027 |
|
|
proto = isdn_ppp_strip_proto(skb);
|
| 1028 |
|
|
|
| 1029 |
|
|
#ifdef CONFIG_ISDN_MPP
|
| 1030 |
|
|
if (!(is->mpppcfg & SC_REJ_MP_PROT)) {
|
| 1031 |
|
|
int sqno_end;
|
| 1032 |
|
|
|
| 1033 |
|
|
if(proto == PPP_LINK_COMP) {
|
| 1034 |
|
|
printk(KERN_DEBUG "received single link compressed frame\n");
|
| 1035 |
|
|
skb = isdn_ppp_decompress(skb,is,NULL);
|
| 1036 |
|
|
if(!skb)
|
| 1037 |
|
|
return;
|
| 1038 |
|
|
proto = isdn_ppp_strip_proto(skb);
|
| 1039 |
|
|
}
|
| 1040 |
|
|
|
| 1041 |
|
|
if (proto == PPP_MP) {
|
| 1042 |
|
|
isdn_net_local *lpq;
|
| 1043 |
|
|
long sqno, min_sqno, tseq;
|
| 1044 |
|
|
|
| 1045 |
|
|
u_char BEbyte = skb->data[0];
|
| 1046 |
|
|
if (is->debug & 0x8)
|
| 1047 |
|
|
printk(KERN_DEBUG "recv: %d/%04x/%d -> %02x %02x %02x %02x %02x %02x\n", lp->ppp_slot, proto,
|
| 1048 |
|
|
(int) skb->len, (int) skb->data[0], (int) skb->data[1], (int) skb->data[2],
|
| 1049 |
|
|
(int) skb->data[3], (int) skb->data[4], (int) skb->data[5]);
|
| 1050 |
|
|
if (!(is->mpppcfg & SC_IN_SHORT_SEQ)) {
|
| 1051 |
|
|
sqno = ((int) skb->data[1] << 16) + ((int) skb->data[2] << 8) + (int) skb->data[3];
|
| 1052 |
|
|
skb_pull(skb, 4);
|
| 1053 |
|
|
} else {
|
| 1054 |
|
|
sqno = (((int) skb->data[0] & 0xf) << 8) + (int) skb->data[1];
|
| 1055 |
|
|
skb_pull(skb, 2);
|
| 1056 |
|
|
}
|
| 1057 |
|
|
|
| 1058 |
|
|
/*
|
| 1059 |
|
|
* new sequence number lower than last number? (this is only allowed
|
| 1060 |
|
|
* for overflow case)
|
| 1061 |
|
|
*/
|
| 1062 |
|
|
if ((tseq = is->last_link_seqno) >= sqno) {
|
| 1063 |
|
|
int range = is->range;
|
| 1064 |
|
|
if (tseq + 1024 < range + sqno) /* redundancy check .. not MP conform */
|
| 1065 |
|
|
printk(KERN_WARNING "isdn_ppp_receive, MP, detected overflow with sqno: %ld, last: %ld !!!\n", sqno, tseq);
|
| 1066 |
|
|
else {
|
| 1067 |
|
|
sqno += range;
|
| 1068 |
|
|
is->last_link_seqno = sqno;
|
| 1069 |
|
|
}
|
| 1070 |
|
|
} else {
|
| 1071 |
|
|
/* here, we should also add an redundancy check */
|
| 1072 |
|
|
is->last_link_seqno = sqno;
|
| 1073 |
|
|
}
|
| 1074 |
|
|
|
| 1075 |
|
|
/*
|
| 1076 |
|
|
* step over all links to find lowest link number
|
| 1077 |
|
|
*/
|
| 1078 |
|
|
for (min_sqno = LONG_MAX, lpq = net_dev->queue;;) {
|
| 1079 |
|
|
long lls = ippp_table[lpq->ppp_slot]->last_link_seqno;
|
| 1080 |
|
|
if (lls >= 0 && lls < min_sqno)
|
| 1081 |
|
|
min_sqno = lls;
|
| 1082 |
|
|
lpq = lpq->next;
|
| 1083 |
|
|
if (lpq == net_dev->queue)
|
| 1084 |
|
|
break;
|
| 1085 |
|
|
}
|
| 1086 |
|
|
|
| 1087 |
|
|
/*
|
| 1088 |
|
|
* for the case, that the last frame numbers of all
|
| 1089 |
|
|
* links are overflowed: mask/reduce the sequenece number to
|
| 1090 |
|
|
* 'normal' numbering.
|
| 1091 |
|
|
*/
|
| 1092 |
|
|
if (min_sqno >= ippp_table[lpq->ppp_slot]->range) {
|
| 1093 |
|
|
int mask = ippp_table[lpq->ppp_slot]->range-1; /* range is power of two, so a mask will do the job */
|
| 1094 |
|
|
isdn_ppp_mask_queue(net_dev, mask);
|
| 1095 |
|
|
net_dev->ib.next_num &= mask;
|
| 1096 |
|
|
{
|
| 1097 |
|
|
struct sqqueue *q = net_dev->ib.sq;
|
| 1098 |
|
|
while (q) {
|
| 1099 |
|
|
q->sqno_start &= mask;
|
| 1100 |
|
|
q->sqno_end &= mask;
|
| 1101 |
|
|
}
|
| 1102 |
|
|
}
|
| 1103 |
|
|
min_sqno &= mask;
|
| 1104 |
|
|
for (lpq = net_dev->queue;;) {
|
| 1105 |
|
|
ippp_table[lpq->ppp_slot]->last_link_seqno &= mask;
|
| 1106 |
|
|
lpq = lpq->next;
|
| 1107 |
|
|
if (lpq == net_dev->queue)
|
| 1108 |
|
|
break;
|
| 1109 |
|
|
}
|
| 1110 |
|
|
}
|
| 1111 |
|
|
if ((BEbyte & (MP_BEGIN_FRAG | MP_END_FRAG)) != (MP_BEGIN_FRAG | MP_END_FRAG)) {
|
| 1112 |
|
|
static int dmes = 0;
|
| 1113 |
|
|
if( !dmes ) {
|
| 1114 |
|
|
printk(KERN_DEBUG "ippp: trying ;) to fill mp_queue %d .. UNTESTED!!\n", lp->ppp_slot);
|
| 1115 |
|
|
dmes = 1;
|
| 1116 |
|
|
}
|
| 1117 |
|
|
if ((sqno_end = isdn_ppp_fill_mpqueue(net_dev, &skb, BEbyte, &sqno, min_sqno)) < 0) {
|
| 1118 |
|
|
net_dev->ib.modify = 1; /* block timeout-timer */
|
| 1119 |
|
|
isdn_ppp_cleanup_sqqueue(net_dev, lp, min_sqno);
|
| 1120 |
|
|
net_dev->ib.modify = 0;
|
| 1121 |
|
|
return; /* no packet complete */
|
| 1122 |
|
|
}
|
| 1123 |
|
|
} else
|
| 1124 |
|
|
sqno_end = sqno;
|
| 1125 |
|
|
|
| 1126 |
|
|
if (is->debug & 0x40)
|
| 1127 |
|
|
printk(KERN_DEBUG "min_sqno: %ld sqno_end %d next: %ld\n", min_sqno, sqno_end, net_dev->ib.next_num);
|
| 1128 |
|
|
|
| 1129 |
|
|
/*
|
| 1130 |
|
|
* MP buffer management .. reorders incoming packets ..
|
| 1131 |
|
|
* lotsa mem-copies and not heavily tested.
|
| 1132 |
|
|
*
|
| 1133 |
|
|
* first check whether there is more than one link in the bundle
|
| 1134 |
|
|
* then check whether the number is in order
|
| 1135 |
|
|
*/
|
| 1136 |
|
|
net_dev->ib.modify = 1; /* block timeout-timer */
|
| 1137 |
|
|
if (net_dev->ib.bundled && net_dev->ib.next_num != sqno) {
|
| 1138 |
|
|
/*
|
| 1139 |
|
|
* packet is not 'in order'
|
| 1140 |
|
|
*/
|
| 1141 |
|
|
struct sqqueue *q;
|
| 1142 |
|
|
|
| 1143 |
|
|
q = (struct sqqueue *) kmalloc(sizeof(struct sqqueue), GFP_ATOMIC);
|
| 1144 |
|
|
if (!q) {
|
| 1145 |
|
|
net_dev->ib.modify = 0;
|
| 1146 |
|
|
printk(KERN_WARNING "ippp/MPPP: Bad! Can't alloc sq node!\n");
|
| 1147 |
|
|
SET_SKB_FREE(skb);
|
| 1148 |
|
|
dev_kfree_skb(skb, 0 /* FREE_READ */ );
|
| 1149 |
|
|
return; /* discard */
|
| 1150 |
|
|
}
|
| 1151 |
|
|
q->skb = skb;
|
| 1152 |
|
|
q->sqno_end = sqno_end;
|
| 1153 |
|
|
q->sqno_start = sqno;
|
| 1154 |
|
|
q->timer = jiffies + (ISDN_TIMER_1SEC) * 5; /* timeout after 5 seconds */
|
| 1155 |
|
|
|
| 1156 |
|
|
if (!net_dev->ib.sq) {
|
| 1157 |
|
|
net_dev->ib.sq = q;
|
| 1158 |
|
|
q->next = NULL;
|
| 1159 |
|
|
} else {
|
| 1160 |
|
|
struct sqqueue *ql = net_dev->ib.sq;
|
| 1161 |
|
|
if (ql->sqno_start > q->sqno_start) {
|
| 1162 |
|
|
q->next = ql;
|
| 1163 |
|
|
net_dev->ib.sq = q;
|
| 1164 |
|
|
} else {
|
| 1165 |
|
|
while (ql->next && ql->next->sqno_start < q->sqno_start)
|
| 1166 |
|
|
ql = ql->next;
|
| 1167 |
|
|
q->next = ql->next;
|
| 1168 |
|
|
ql->next = q;
|
| 1169 |
|
|
}
|
| 1170 |
|
|
}
|
| 1171 |
|
|
} else {
|
| 1172 |
|
|
/*
|
| 1173 |
|
|
* packet was 'in order' .. push it higher
|
| 1174 |
|
|
*/
|
| 1175 |
|
|
net_dev->ib.next_num = sqno_end + 1;
|
| 1176 |
|
|
proto = isdn_ppp_strip_proto(skb);
|
| 1177 |
|
|
isdn_ppp_push_higher(net_dev, lp, skb, proto);
|
| 1178 |
|
|
}
|
| 1179 |
|
|
isdn_ppp_cleanup_sqqueue(net_dev, lp, min_sqno);
|
| 1180 |
|
|
net_dev->ib.modify = 0;
|
| 1181 |
|
|
|
| 1182 |
|
|
} else
|
| 1183 |
|
|
isdn_ppp_push_higher(net_dev, lp, skb, proto);
|
| 1184 |
|
|
} else
|
| 1185 |
|
|
#endif
|
| 1186 |
|
|
isdn_ppp_push_higher(net_dev, lp, skb, proto);
|
| 1187 |
|
|
}
|
| 1188 |
|
|
|
| 1189 |
|
|
/*
|
| 1190 |
|
|
* push frame to higher layers
|
| 1191 |
|
|
* note: net_dev has to be master net_dev
|
| 1192 |
|
|
*/
|
| 1193 |
|
|
static void
|
| 1194 |
|
|
isdn_ppp_push_higher(isdn_net_dev * net_dev, isdn_net_local * lp, struct sk_buff *skb, int proto)
|
| 1195 |
|
|
{
|
| 1196 |
|
|
struct device *dev = &net_dev->dev;
|
| 1197 |
|
|
struct ippp_struct *is = ippp_table[lp->ppp_slot];
|
| 1198 |
|
|
|
| 1199 |
|
|
if (is->debug & 0x10) {
|
| 1200 |
|
|
printk(KERN_DEBUG "push, skb %d %04x\n", (int) skb->len, proto);
|
| 1201 |
|
|
isdn_ppp_frame_log("rpush", skb->data, skb->len, 32);
|
| 1202 |
|
|
}
|
| 1203 |
|
|
|
| 1204 |
|
|
if(proto == PPP_COMP) {
|
| 1205 |
|
|
if(!lp->master)
|
| 1206 |
|
|
skb = isdn_ppp_decompress(skb,is,is);
|
| 1207 |
|
|
else
|
| 1208 |
|
|
skb = isdn_ppp_decompress(skb,is,ippp_table[((isdn_net_local *) (lp->master->priv))->ppp_slot]);
|
| 1209 |
|
|
if(!skb)
|
| 1210 |
|
|
return;
|
| 1211 |
|
|
proto = isdn_ppp_strip_proto(skb);
|
| 1212 |
|
|
}
|
| 1213 |
|
|
|
| 1214 |
|
|
switch (proto) {
|
| 1215 |
|
|
case PPP_IPX: /* untested */
|
| 1216 |
|
|
if (is->debug & 0x20)
|
| 1217 |
|
|
printk(KERN_DEBUG "isdn_ppp: IPX\n");
|
| 1218 |
|
|
skb->dev = dev;
|
| 1219 |
|
|
skb->mac.raw = skb->data;
|
| 1220 |
|
|
skb->protocol = htons(ETH_P_IPX);
|
| 1221 |
|
|
break;
|
| 1222 |
|
|
#ifdef CONFIG_ISDN_PPP_VJ
|
| 1223 |
|
|
case PPP_VJC_UNCOMP:
|
| 1224 |
|
|
if (is->debug & 0x20)
|
| 1225 |
|
|
printk(KERN_DEBUG "isdn_ppp: VJC_UNCOMP\n");
|
| 1226 |
|
|
if (slhc_remember(ippp_table[net_dev->local.ppp_slot]->slcomp, skb->data, skb->len) <= 0) {
|
| 1227 |
|
|
printk(KERN_WARNING "isdn_ppp: received illegal VJC_UNCOMP frame!\n");
|
| 1228 |
|
|
net_dev->local.stats.rx_dropped++;
|
| 1229 |
|
|
SET_SKB_FREE(skb);
|
| 1230 |
|
|
dev_kfree_skb(skb, 0 /* FREE_READ */ );
|
| 1231 |
|
|
return;
|
| 1232 |
|
|
}
|
| 1233 |
|
|
#endif
|
| 1234 |
|
|
case PPP_IP:
|
| 1235 |
|
|
if (is->debug & 0x20)
|
| 1236 |
|
|
printk(KERN_DEBUG "isdn_ppp: IP\n");
|
| 1237 |
|
|
skb->dev = dev;
|
| 1238 |
|
|
skb->mac.raw = skb->data;
|
| 1239 |
|
|
skb->protocol = htons(ETH_P_IP);
|
| 1240 |
|
|
break;
|
| 1241 |
|
|
case PPP_VJC_COMP:
|
| 1242 |
|
|
if (is->debug & 0x20)
|
| 1243 |
|
|
printk(KERN_DEBUG "isdn_ppp: VJC_COMP\n");
|
| 1244 |
|
|
#ifdef CONFIG_ISDN_PPP_VJ
|
| 1245 |
|
|
{
|
| 1246 |
|
|
struct sk_buff *skb_old = skb;
|
| 1247 |
|
|
int pkt_len;
|
| 1248 |
|
|
skb = dev_alloc_skb(skb_old->len + 40);
|
| 1249 |
|
|
|
| 1250 |
|
|
SET_SKB_FREE(skb_old);
|
| 1251 |
|
|
|
| 1252 |
|
|
if (!skb) {
|
| 1253 |
|
|
printk(KERN_WARNING "%s: Memory squeeze, dropping packet.\n", dev->name);
|
| 1254 |
|
|
net_dev->local.stats.rx_dropped++;
|
| 1255 |
|
|
dev_kfree_skb(skb_old, 0 /* FREE_READ */ );
|
| 1256 |
|
|
return;
|
| 1257 |
|
|
}
|
| 1258 |
|
|
skb->dev = dev;
|
| 1259 |
|
|
skb_put(skb, skb_old->len + 40);
|
| 1260 |
|
|
memcpy(skb->data, skb_old->data, skb_old->len);
|
| 1261 |
|
|
skb->mac.raw = skb->data;
|
| 1262 |
|
|
pkt_len = slhc_uncompress(ippp_table[net_dev->local.ppp_slot]->slcomp,
|
| 1263 |
|
|
skb->data, skb_old->len);
|
| 1264 |
|
|
dev_kfree_skb(skb_old, 0 /* FREE_READ */ );
|
| 1265 |
|
|
if (pkt_len < 0) {
|
| 1266 |
|
|
SET_SKB_FREE(skb);
|
| 1267 |
|
|
dev_kfree_skb(skb, 0 /* FREE_READ */ );
|
| 1268 |
|
|
lp->stats.rx_dropped++;
|
| 1269 |
|
|
return;
|
| 1270 |
|
|
}
|
| 1271 |
|
|
skb_trim(skb, pkt_len);
|
| 1272 |
|
|
skb->protocol = htons(ETH_P_IP);
|
| 1273 |
|
|
}
|
| 1274 |
|
|
#else
|
| 1275 |
|
|
printk(KERN_INFO "isdn: Ooopsa .. VJ-Compression support not compiled into isdn driver.\n");
|
| 1276 |
|
|
lp->stats.rx_dropped++;
|
| 1277 |
|
|
SET_SKB_FREE(skb);
|
| 1278 |
|
|
dev_kfree_skb(skb, 0 /* FREE_READ */ );
|
| 1279 |
|
|
return;
|
| 1280 |
|
|
#endif
|
| 1281 |
|
|
break;
|
| 1282 |
|
|
case PPP_CCP:
|
| 1283 |
|
|
isdn_ppp_receive_ccp(net_dev,lp,skb);
|
| 1284 |
|
|
/* fall through */
|
| 1285 |
|
|
default:
|
| 1286 |
|
|
isdn_ppp_fill_rq(skb->data, skb->len, proto, lp->ppp_slot); /* push data to pppd device */
|
| 1287 |
|
|
SET_SKB_FREE(skb);
|
| 1288 |
|
|
dev_kfree_skb(skb, 0 /* FREE_READ */ );
|
| 1289 |
|
|
return;
|
| 1290 |
|
|
}
|
| 1291 |
|
|
|
| 1292 |
|
|
/* Reset hangup-timer */
|
| 1293 |
|
|
lp->huptimer = 0;
|
| 1294 |
|
|
netif_rx(skb);
|
| 1295 |
|
|
/* net_dev->local.stats.rx_packets++; *//* done in isdn_net.c */
|
| 1296 |
|
|
|
| 1297 |
|
|
return;
|
| 1298 |
|
|
}
|
| 1299 |
|
|
|
| 1300 |
|
|
/*
|
| 1301 |
|
|
* isdn_ppp_skb_push ..
|
| 1302 |
|
|
* checks whether we have enough space at the beginning of the SKB
|
| 1303 |
|
|
* and allocs a new SKB if necessary
|
| 1304 |
|
|
*/
|
| 1305 |
|
|
static unsigned char *isdn_ppp_skb_push(struct sk_buff **skb_p,int len)
|
| 1306 |
|
|
{
|
| 1307 |
|
|
struct sk_buff *skb = *skb_p;
|
| 1308 |
|
|
|
| 1309 |
|
|
if(skb_headroom(skb) < len) {
|
| 1310 |
|
|
printk(KERN_ERR "isdn_ppp_skb_push:under %d %d\n",skb_headroom(skb),len);
|
| 1311 |
|
|
dev_kfree_skb(skb,FREE_WRITE);
|
| 1312 |
|
|
return NULL;
|
| 1313 |
|
|
}
|
| 1314 |
|
|
return skb_push(skb,len);
|
| 1315 |
|
|
}
|
| 1316 |
|
|
|
| 1317 |
|
|
|
| 1318 |
|
|
/*
|
| 1319 |
|
|
* send ppp frame .. we expect a PIDCOMPressable proto --
|
| 1320 |
|
|
* (here: currently always PPP_IP,PPP_VJC_COMP,PPP_VJC_UNCOMP)
|
| 1321 |
|
|
*
|
| 1322 |
|
|
* VJ compression may change skb pointer!!! .. requeue with old
|
| 1323 |
|
|
* skb isn't allowed!!
|
| 1324 |
|
|
*/
|
| 1325 |
|
|
|
| 1326 |
|
|
int
|
| 1327 |
|
|
isdn_ppp_xmit(struct sk_buff *skb, struct device *dev)
|
| 1328 |
|
|
{
|
| 1329 |
|
|
struct device *mdev = ((isdn_net_local *) (dev->priv))->master; /* get master (for redundancy) */
|
| 1330 |
|
|
isdn_net_local *lp,*mlp;
|
| 1331 |
|
|
isdn_net_dev *nd;
|
| 1332 |
|
|
unsigned int proto = PPP_IP; /* 0x21 */
|
| 1333 |
|
|
struct ippp_struct *ipt,*ipts;
|
| 1334 |
|
|
|
| 1335 |
|
|
if (mdev)
|
| 1336 |
|
|
mlp = (isdn_net_local *) (mdev->priv);
|
| 1337 |
|
|
else {
|
| 1338 |
|
|
mdev = dev;
|
| 1339 |
|
|
mlp = (isdn_net_local *) (dev->priv);
|
| 1340 |
|
|
}
|
| 1341 |
|
|
nd = mlp->netdev; /* get master lp */
|
| 1342 |
|
|
ipts = ippp_table[mlp->ppp_slot];
|
| 1343 |
|
|
|
| 1344 |
|
|
if (!(ipts->pppcfg & SC_ENABLE_IP)) { /* PPP connected ? */
|
| 1345 |
|
|
#ifdef ISDN_SYNCPPP_READDRESS
|
| 1346 |
|
|
if (!ipts->old_pa_addr)
|
| 1347 |
|
|
ipts->old_pa_addr = mdev->pa_addr;
|
| 1348 |
|
|
if (!ipts->old_pa_dstaddr)
|
| 1349 |
|
|
ipts->old_pa_dstaddr = mdev->pa_dstaddr;
|
| 1350 |
|
|
#endif
|
| 1351 |
|
|
if (ipts->debug & 0x1)
|
| 1352 |
|
|
printk(KERN_INFO "%s: IP frame delayed.\n", dev->name);
|
| 1353 |
|
|
return 1;
|
| 1354 |
|
|
}
|
| 1355 |
|
|
|
| 1356 |
|
|
switch (ntohs(skb->protocol)) {
|
| 1357 |
|
|
case ETH_P_IP:
|
| 1358 |
|
|
proto = PPP_IP;
|
| 1359 |
|
|
#ifdef ISDN_SYNCPPP_READDRESS
|
| 1360 |
|
|
if (ipts->old_pa_addr != mdev->pa_addr) {
|
| 1361 |
|
|
struct iphdr *ipfr;
|
| 1362 |
|
|
ipfr = (struct iphdr *) skb->data;
|
| 1363 |
|
|
if(ipts->debug & 0x4)
|
| 1364 |
|
|
printk(KERN_DEBUG "IF-address changed from %lx to %lx\n", ipts->old_pa_addr, mdev->pa_addr);
|
| 1365 |
|
|
if (ipfr->version == 4) {
|
| 1366 |
|
|
if (ipfr->saddr == ipts->old_pa_addr) {
|
| 1367 |
|
|
printk(KERN_DEBUG "readdressing %lx to %lx\n", ipfr->saddr, mdev->pa_addr);
|
| 1368 |
|
|
ipfr->saddr = mdev->pa_addr;
|
| 1369 |
|
|
}
|
| 1370 |
|
|
}
|
| 1371 |
|
|
}
|
| 1372 |
|
|
/* dstaddr change not so important */
|
| 1373 |
|
|
#endif
|
| 1374 |
|
|
break;
|
| 1375 |
|
|
case ETH_P_IPX:
|
| 1376 |
|
|
proto = PPP_IPX; /* untested */
|
| 1377 |
|
|
break;
|
| 1378 |
|
|
default:
|
| 1379 |
|
|
dev_kfree_skb(skb, FREE_WRITE);
|
| 1380 |
|
|
printk(KERN_ERR "isdn_ppp: skipped frame with unsupported protocoll: %#x.\n", skb->protocol);
|
| 1381 |
|
|
return 0;
|
| 1382 |
|
|
}
|
| 1383 |
|
|
|
| 1384 |
|
|
lp = nd->queue; /* get lp on top of queue */
|
| 1385 |
|
|
|
| 1386 |
|
|
if (lp->sav_skb) { /* find a non-busy device */
|
| 1387 |
|
|
isdn_net_local *nlp = lp->next;
|
| 1388 |
|
|
while (lp->sav_skb) {
|
| 1389 |
|
|
if (lp == nlp)
|
| 1390 |
|
|
return 1;
|
| 1391 |
|
|
nlp = nd->queue = nd->queue->next;
|
| 1392 |
|
|
}
|
| 1393 |
|
|
lp = nlp;
|
| 1394 |
|
|
}
|
| 1395 |
|
|
ipt = ippp_table[lp->ppp_slot];
|
| 1396 |
|
|
|
| 1397 |
|
|
lp->huptimer = 0;
|
| 1398 |
|
|
|
| 1399 |
|
|
/*
|
| 1400 |
|
|
* after this line .. requeueing in the device queue is no longer allowed!!!
|
| 1401 |
|
|
*/
|
| 1402 |
|
|
|
| 1403 |
|
|
/* Pull off the fake header we stuck on earlier to keep
|
| 1404 |
|
|
* the fragemntation code happy.
|
| 1405 |
|
|
* this will break the ISDN_SYNCPPP_READDRESS hack a few lines
|
| 1406 |
|
|
* above. So, enabling this is no longer allowed
|
| 1407 |
|
|
*/
|
| 1408 |
|
|
skb_pull(skb,IPPP_MAX_HEADER);
|
| 1409 |
|
|
|
| 1410 |
|
|
if (ipt->debug & 0x4)
|
| 1411 |
|
|
printk(KERN_DEBUG "xmit skb, len %d\n", (int) skb->len);
|
| 1412 |
|
|
|
| 1413 |
|
|
#ifdef CONFIG_ISDN_PPP_VJ
|
| 1414 |
|
|
if (proto == PPP_IP && ipts->pppcfg & SC_COMP_TCP) { /* ipts here? probably yes, but check this again */
|
| 1415 |
|
|
struct sk_buff *new_skb;
|
| 1416 |
|
|
|
| 1417 |
|
|
new_skb = dev_alloc_skb(skb->len);
|
| 1418 |
|
|
if (new_skb) {
|
| 1419 |
|
|
u_char *buf;
|
| 1420 |
|
|
int pktlen;
|
| 1421 |
|
|
|
| 1422 |
|
|
new_skb->dev = skb->dev;
|
| 1423 |
|
|
SET_SKB_FREE(new_skb);
|
| 1424 |
|
|
skb_put(new_skb, skb->len);
|
| 1425 |
|
|
buf = skb->data;
|
| 1426 |
|
|
|
| 1427 |
|
|
pktlen = slhc_compress(ipts->slcomp, skb->data, skb->len, new_skb->data,
|
| 1428 |
|
|
&buf, !(ipts->pppcfg & SC_NO_TCP_CCID));
|
| 1429 |
|
|
|
| 1430 |
|
|
if (buf != skb->data) {
|
| 1431 |
|
|
if (new_skb->data != buf)
|
| 1432 |
|
|
printk(KERN_ERR "isdn_ppp: FATAL error after slhc_compress!!\n");
|
| 1433 |
|
|
dev_kfree_skb(skb, FREE_WRITE);
|
| 1434 |
|
|
skb = new_skb;
|
| 1435 |
|
|
} else {
|
| 1436 |
|
|
dev_kfree_skb(new_skb, 0 /* FREE_WRITE */ );
|
| 1437 |
|
|
}
|
| 1438 |
|
|
|
| 1439 |
|
|
skb_trim(skb, pktlen);
|
| 1440 |
|
|
if (skb->data[0] & SL_TYPE_COMPRESSED_TCP) { /* cslip? style -> PPP */
|
| 1441 |
|
|
proto = PPP_VJC_COMP;
|
| 1442 |
|
|
skb->data[0] ^= SL_TYPE_COMPRESSED_TCP;
|
| 1443 |
|
|
} else {
|
| 1444 |
|
|
if (skb->data[0] >= SL_TYPE_UNCOMPRESSED_TCP)
|
| 1445 |
|
|
proto = PPP_VJC_UNCOMP;
|
| 1446 |
|
|
skb->data[0] = (skb->data[0] & 0x0f) | 0x40;
|
| 1447 |
|
|
}
|
| 1448 |
|
|
}
|
| 1449 |
|
|
}
|
| 1450 |
|
|
#endif
|
| 1451 |
|
|
|
| 1452 |
|
|
/*
|
| 1453 |
|
|
* normal or bundle compression
|
| 1454 |
|
|
*/
|
| 1455 |
|
|
skb = isdn_ppp_compress(skb,&proto,ipt,ipts,0);
|
| 1456 |
|
|
|
| 1457 |
|
|
if (ipt->debug & 0x24)
|
| 1458 |
|
|
printk(KERN_DEBUG "xmit2 skb, len %d, proto %04x\n", (int) skb->len, proto);
|
| 1459 |
|
|
|
| 1460 |
|
|
#ifdef CONFIG_ISDN_MPP
|
| 1461 |
|
|
if (ipt->mpppcfg & SC_MP_PROT) {
|
| 1462 |
|
|
/* we get mp_seqno from static isdn_net_local */
|
| 1463 |
|
|
long mp_seqno = ipts->mp_seqno;
|
| 1464 |
|
|
ipts->mp_seqno++;
|
| 1465 |
|
|
nd->queue = nd->queue->next;
|
| 1466 |
|
|
if (ipt->mpppcfg & SC_OUT_SHORT_SEQ) {
|
| 1467 |
|
|
unsigned char *data = isdn_ppp_skb_push(&skb, 3);
|
| 1468 |
|
|
if(!data)
|
| 1469 |
|
|
return 0;
|
| 1470 |
|
|
mp_seqno &= 0xfff;
|
| 1471 |
|
|
data[0] = MP_BEGIN_FRAG | MP_END_FRAG | ((mp_seqno >> 8) & 0xf); /* (B)egin & (E)ndbit .. */
|
| 1472 |
|
|
data[1] = mp_seqno & 0xff;
|
| 1473 |
|
|
data[2] = proto; /* PID compression */
|
| 1474 |
|
|
} else {
|
| 1475 |
|
|
unsigned char *data = isdn_ppp_skb_push(&skb, 5);
|
| 1476 |
|
|
if(!data)
|
| 1477 |
|
|
return 0;
|
| 1478 |
|
|
data[0] = MP_BEGIN_FRAG | MP_END_FRAG; /* (B)egin & (E)ndbit .. */
|
| 1479 |
|
|
data[1] = (mp_seqno >> 16) & 0xff; /* sequence number: 24bit */
|
| 1480 |
|
|
data[2] = (mp_seqno >> 8) & 0xff;
|
| 1481 |
|
|
data[3] = (mp_seqno >> 0) & 0xff;
|
| 1482 |
|
|
data[4] = proto; /* PID compression */
|
| 1483 |
|
|
}
|
| 1484 |
|
|
proto = PPP_MP; /* MP Protocol, 0x003d */
|
| 1485 |
|
|
}
|
| 1486 |
|
|
#endif
|
| 1487 |
|
|
|
| 1488 |
|
|
/*
|
| 1489 |
|
|
* 'link' compression
|
| 1490 |
|
|
*/
|
| 1491 |
|
|
skb = isdn_ppp_compress(skb,&proto,ipt,ipts,1);
|
| 1492 |
|
|
|
| 1493 |
|
|
if( (ipt->pppcfg & SC_COMP_PROT) && (proto <= 0xff) ) {
|
| 1494 |
|
|
unsigned char *data = isdn_ppp_skb_push(&skb,1);
|
| 1495 |
|
|
if(!data)
|
| 1496 |
|
|
return 0;
|
| 1497 |
|
|
data[0] = proto & 0xff;
|
| 1498 |
|
|
}
|
| 1499 |
|
|
else {
|
| 1500 |
|
|
unsigned char *data = isdn_ppp_skb_push(&skb,2);
|
| 1501 |
|
|
if(!data)
|
| 1502 |
|
|
return 0;
|
| 1503 |
|
|
data[0] = (proto >> 8) & 0xff;
|
| 1504 |
|
|
data[1] = proto & 0xff;
|
| 1505 |
|
|
}
|
| 1506 |
|
|
if(!(ipt->pppcfg & SC_COMP_AC)) {
|
| 1507 |
|
|
unsigned char *data = isdn_ppp_skb_push(&skb,2);
|
| 1508 |
|
|
if(!data)
|
| 1509 |
|
|
return 0;
|
| 1510 |
|
|
data[0] = 0xff; /* All Stations */
|
| 1511 |
|
|
data[1] = 0x03; /* Unnumbered information */
|
| 1512 |
|
|
}
|
| 1513 |
|
|
|
| 1514 |
|
|
/* tx-stats are now updated via BSENT-callback */
|
| 1515 |
|
|
|
| 1516 |
|
|
if (ipts->debug & 0x40) {
|
| 1517 |
|
|
printk(KERN_DEBUG "skb xmit: len: %d\n", (int) skb->len);
|
| 1518 |
|
|
isdn_ppp_frame_log("xmit", skb->data, skb->len, 32);
|
| 1519 |
|
|
}
|
| 1520 |
|
|
if (isdn_net_send_skb(dev, lp, skb)) {
|
| 1521 |
|
|
if (lp->sav_skb) { /* whole sav_skb processing with disabled IRQs ?? */
|
| 1522 |
|
|
printk(KERN_ERR "%s: whoops .. there is another stored skb!\n", dev->name);
|
| 1523 |
|
|
dev_kfree_skb(skb, FREE_WRITE);
|
| 1524 |
|
|
} else
|
| 1525 |
|
|
lp->sav_skb = skb;
|
| 1526 |
|
|
}
|
| 1527 |
|
|
return 0;
|
| 1528 |
|
|
}
|
| 1529 |
|
|
|
| 1530 |
|
|
#ifdef CONFIG_ISDN_MPP
|
| 1531 |
|
|
|
| 1532 |
|
|
static void
|
| 1533 |
|
|
isdn_ppp_free_sqqueue(isdn_net_dev * p)
|
| 1534 |
|
|
{
|
| 1535 |
|
|
struct sqqueue *q = p->ib.sq;
|
| 1536 |
|
|
|
| 1537 |
|
|
p->ib.sq = NULL;
|
| 1538 |
|
|
while (q) {
|
| 1539 |
|
|
struct sqqueue *qn = q->next;
|
| 1540 |
|
|
if (q->skb) {
|
| 1541 |
|
|
SET_SKB_FREE(q->skb);
|
| 1542 |
|
|
dev_kfree_skb(q->skb, 0 /* FREE_READ */ );
|
| 1543 |
|
|
}
|
| 1544 |
|
|
kfree(q);
|
| 1545 |
|
|
q = qn;
|
| 1546 |
|
|
}
|
| 1547 |
|
|
|
| 1548 |
|
|
}
|
| 1549 |
|
|
|
| 1550 |
|
|
static void
|
| 1551 |
|
|
isdn_ppp_free_mpqueue(isdn_net_dev * p)
|
| 1552 |
|
|
{
|
| 1553 |
|
|
struct mpqueue *q = p->mp_last;
|
| 1554 |
|
|
p->mp_last = NULL;
|
| 1555 |
|
|
|
| 1556 |
|
|
while (q) {
|
| 1557 |
|
|
struct mpqueue *ql = q->next;
|
| 1558 |
|
|
SET_SKB_FREE(q->skb);
|
| 1559 |
|
|
dev_kfree_skb(q->skb, 0 /* FREE_READ */ );
|
| 1560 |
|
|
kfree(q);
|
| 1561 |
|
|
q = ql;
|
| 1562 |
|
|
}
|
| 1563 |
|
|
}
|
| 1564 |
|
|
|
| 1565 |
|
|
static int
|
| 1566 |
|
|
isdn_ppp_bundle(struct ippp_struct *is, int unit)
|
| 1567 |
|
|
{
|
| 1568 |
|
|
char ifn[IFNAMSIZ + 1];
|
| 1569 |
|
|
long flags;
|
| 1570 |
|
|
isdn_net_dev *p;
|
| 1571 |
|
|
isdn_net_local *lp,
|
| 1572 |
|
|
*nlp;
|
| 1573 |
|
|
|
| 1574 |
|
|
sprintf(ifn, "ippp%d", unit);
|
| 1575 |
|
|
p = isdn_net_findif(ifn);
|
| 1576 |
|
|
if (!p)
|
| 1577 |
|
|
return -1;
|
| 1578 |
|
|
|
| 1579 |
|
|
isdn_timer_ctrl(ISDN_TIMER_IPPP, 1); /* enable timer for ippp/MP */
|
| 1580 |
|
|
|
| 1581 |
|
|
save_flags(flags);
|
| 1582 |
|
|
cli();
|
| 1583 |
|
|
|
| 1584 |
|
|
nlp = is->lp;
|
| 1585 |
|
|
|
| 1586 |
|
|
lp = p->queue;
|
| 1587 |
|
|
p->ib.bundled = 1;
|
| 1588 |
|
|
nlp->last = lp->last;
|
| 1589 |
|
|
lp->last->next = nlp;
|
| 1590 |
|
|
lp->last = nlp;
|
| 1591 |
|
|
nlp->next = lp;
|
| 1592 |
|
|
p->queue = nlp;
|
| 1593 |
|
|
|
| 1594 |
|
|
ippp_table[nlp->ppp_slot]->unit = ippp_table[lp->ppp_slot]->unit;
|
| 1595 |
|
|
/* maybe also SC_CCP stuff */
|
| 1596 |
|
|
ippp_table[nlp->ppp_slot]->pppcfg |= ippp_table[lp->ppp_slot]->pppcfg &
|
| 1597 |
|
|
(SC_ENABLE_IP | SC_NO_TCP_CCID | SC_REJ_COMP_TCP);
|
| 1598 |
|
|
|
| 1599 |
|
|
ippp_table[nlp->ppp_slot]->mpppcfg |= ippp_table[lp->ppp_slot]->mpppcfg &
|
| 1600 |
|
|
(SC_MP_PROT | SC_REJ_MP_PROT | SC_OUT_SHORT_SEQ | SC_IN_SHORT_SEQ);
|
| 1601 |
|
|
#if 0
|
| 1602 |
|
|
if (ippp_table[nlp->ppp_slot]->mpppcfg != ippp_table[lp->ppp_slot]->mpppcfg) {
|
| 1603 |
|
|
printk(KERN_WARNING "isdn_ppp_bundle: different MP options %04x and %04x\n",
|
| 1604 |
|
|
ippp_table[nlp->ppp_slot]->mpppcfg, ippp_table[lp->ppp_slot]->mpppcfg);
|
| 1605 |
|
|
}
|
| 1606 |
|
|
#endif
|
| 1607 |
|
|
|
| 1608 |
|
|
restore_flags(flags);
|
| 1609 |
|
|
return 0;
|
| 1610 |
|
|
}
|
| 1611 |
|
|
|
| 1612 |
|
|
|
| 1613 |
|
|
static void
|
| 1614 |
|
|
isdn_ppp_mask_queue(isdn_net_dev * dev, long mask)
|
| 1615 |
|
|
{
|
| 1616 |
|
|
struct mpqueue *q = dev->mp_last;
|
| 1617 |
|
|
while (q) {
|
| 1618 |
|
|
q->sqno &= mask;
|
| 1619 |
|
|
q = q->next;
|
| 1620 |
|
|
}
|
| 1621 |
|
|
}
|
| 1622 |
|
|
|
| 1623 |
|
|
static int
|
| 1624 |
|
|
isdn_ppp_fill_mpqueue(isdn_net_dev * dev, struct sk_buff **skb, int BEbyte, long *sqnop, int min_sqno)
|
| 1625 |
|
|
{
|
| 1626 |
|
|
struct mpqueue *qe,
|
| 1627 |
|
|
*q1,
|
| 1628 |
|
|
*q;
|
| 1629 |
|
|
long cnt,
|
| 1630 |
|
|
flags;
|
| 1631 |
|
|
int pktlen,
|
| 1632 |
|
|
sqno_end;
|
| 1633 |
|
|
int sqno = *sqnop;
|
| 1634 |
|
|
|
| 1635 |
|
|
q1 = (struct mpqueue *) kmalloc(sizeof(struct mpqueue), GFP_ATOMIC);
|
| 1636 |
|
|
if (!q1) {
|
| 1637 |
|
|
printk(KERN_WARNING "isdn_ppp_fill_mpqueue: Can't alloc struct memory.\n");
|
| 1638 |
|
|
save_flags(flags);
|
| 1639 |
|
|
cli();
|
| 1640 |
|
|
isdn_ppp_cleanup_mpqueue(dev, min_sqno);
|
| 1641 |
|
|
restore_flags(flags);
|
| 1642 |
|
|
return -1;
|
| 1643 |
|
|
}
|
| 1644 |
|
|
q1->skb = *skb;
|
| 1645 |
|
|
q1->sqno = sqno;
|
| 1646 |
|
|
q1->BEbyte = BEbyte;
|
| 1647 |
|
|
q1->time = jiffies;
|
| 1648 |
|
|
|
| 1649 |
|
|
save_flags(flags);
|
| 1650 |
|
|
cli();
|
| 1651 |
|
|
|
| 1652 |
|
|
if (!(q = dev->mp_last)) {
|
| 1653 |
|
|
dev->mp_last = q1;
|
| 1654 |
|
|
q1->next = NULL;
|
| 1655 |
|
|
q1->last = NULL;
|
| 1656 |
|
|
isdn_ppp_cleanup_mpqueue(dev, min_sqno); /* not necessary */
|
| 1657 |
|
|
restore_flags(flags);
|
| 1658 |
|
|
return -1; /* -1 is not an error. Just says, that this fragment hasn't complete a full frame */
|
| 1659 |
|
|
}
|
| 1660 |
|
|
for (;;) { /* the faster way would be to step from the queue-end to the start */
|
| 1661 |
|
|
if (sqno > q->sqno) {
|
| 1662 |
|
|
if (q->next) {
|
| 1663 |
|
|
q = q->next;
|
| 1664 |
|
|
continue;
|
| 1665 |
|
|
}
|
| 1666 |
|
|
q->next = q1;
|
| 1667 |
|
|
q1->next = NULL;
|
| 1668 |
|
|
q1->last = q;
|
| 1669 |
|
|
break;
|
| 1670 |
|
|
}
|
| 1671 |
|
|
if (sqno == q->sqno)
|
| 1672 |
|
|
printk(KERN_WARNING "isdn_fill_mpqueue: illegal sqno received!!\n");
|
| 1673 |
|
|
q1->last = q->last;
|
| 1674 |
|
|
q1->next = q;
|
| 1675 |
|
|
if (q->last) {
|
| 1676 |
|
|
q->last->next = q1;
|
| 1677 |
|
|
} else
|
| 1678 |
|
|
dev->mp_last = q1;
|
| 1679 |
|
|
q->last = q1;
|
| 1680 |
|
|
break;
|
| 1681 |
|
|
}
|
| 1682 |
|
|
|
| 1683 |
|
|
/* now we check whether we completed a packet with this fragment */
|
| 1684 |
|
|
pktlen = -q1->skb->len;
|
| 1685 |
|
|
q = q1;
|
| 1686 |
|
|
cnt = q1->sqno;
|
| 1687 |
|
|
while (!(q->BEbyte & MP_END_FRAG)) {
|
| 1688 |
|
|
cnt++;
|
| 1689 |
|
|
if (!(q->next) || q->next->sqno != cnt) {
|
| 1690 |
|
|
isdn_ppp_cleanup_mpqueue(dev, min_sqno);
|
| 1691 |
|
|
restore_flags(flags);
|
| 1692 |
|
|
return -1;
|
| 1693 |
|
|
}
|
| 1694 |
|
|
pktlen += q->skb->len;
|
| 1695 |
|
|
q = q->next;
|
| 1696 |
|
|
}
|
| 1697 |
|
|
pktlen += q->skb->len;
|
| 1698 |
|
|
qe = q;
|
| 1699 |
|
|
|
| 1700 |
|
|
q = q1;
|
| 1701 |
|
|
cnt = q1->sqno;
|
| 1702 |
|
|
while (!(q->BEbyte & MP_BEGIN_FRAG)) {
|
| 1703 |
|
|
cnt--;
|
| 1704 |
|
|
if (!(q->last) || q->last->sqno != cnt) {
|
| 1705 |
|
|
isdn_ppp_cleanup_mpqueue(dev, min_sqno);
|
| 1706 |
|
|
restore_flags(flags);
|
| 1707 |
|
|
return -1;
|
| 1708 |
|
|
}
|
| 1709 |
|
|
pktlen += q->skb->len;
|
| 1710 |
|
|
q = q->last;
|
| 1711 |
|
|
}
|
| 1712 |
|
|
pktlen += q->skb->len;
|
| 1713 |
|
|
|
| 1714 |
|
|
if (q->last)
|
| 1715 |
|
|
q->last->next = qe->next;
|
| 1716 |
|
|
else
|
| 1717 |
|
|
dev->mp_last = qe->next;
|
| 1718 |
|
|
|
| 1719 |
|
|
if (qe->next)
|
| 1720 |
|
|
qe->next->last = q->last;
|
| 1721 |
|
|
qe->next = NULL;
|
| 1722 |
|
|
sqno_end = qe->sqno;
|
| 1723 |
|
|
*sqnop = q->sqno;
|
| 1724 |
|
|
|
| 1725 |
|
|
isdn_ppp_cleanup_mpqueue(dev, min_sqno);
|
| 1726 |
|
|
restore_flags(flags);
|
| 1727 |
|
|
|
| 1728 |
|
|
*skb = dev_alloc_skb(pktlen + 40); /* not needed: +40 for VJ compression .. */
|
| 1729 |
|
|
|
| 1730 |
|
|
if (!(*skb)) {
|
| 1731 |
|
|
while (q) {
|
| 1732 |
|
|
struct mpqueue *ql = q->next;
|
| 1733 |
|
|
SET_SKB_FREE(q->skb);
|
| 1734 |
|
|
dev_kfree_skb(q->skb, 0 /* FREE_READ */ );
|
| 1735 |
|
|
kfree(q);
|
| 1736 |
|
|
q = ql;
|
| 1737 |
|
|
}
|
| 1738 |
|
|
return -2;
|
| 1739 |
|
|
}
|
| 1740 |
|
|
cnt = 0;
|
| 1741 |
|
|
skb_put(*skb, pktlen);
|
| 1742 |
|
|
while (q) {
|
| 1743 |
|
|
struct mpqueue *ql = q->next;
|
| 1744 |
|
|
memcpy((*skb)->data + cnt, q->skb->data, q->skb->len);
|
| 1745 |
|
|
cnt += q->skb->len;
|
| 1746 |
|
|
SET_SKB_FREE(q->skb);
|
| 1747 |
|
|
dev_kfree_skb(q->skb, 0 /* FREE_READ */ );
|
| 1748 |
|
|
kfree(q);
|
| 1749 |
|
|
q = ql;
|
| 1750 |
|
|
}
|
| 1751 |
|
|
|
| 1752 |
|
|
return sqno_end;
|
| 1753 |
|
|
}
|
| 1754 |
|
|
|
| 1755 |
|
|
/*
|
| 1756 |
|
|
* check sq-queue, whether we have still buffered the next packet(s)
|
| 1757 |
|
|
* or packets with a sqno less or equal to min_sqno
|
| 1758 |
|
|
* net_dev: master netdevice , lp: 'real' local connection
|
| 1759 |
|
|
*/
|
| 1760 |
|
|
static void
|
| 1761 |
|
|
isdn_ppp_cleanup_sqqueue(isdn_net_dev * net_dev, isdn_net_local * lp, long min_sqno)
|
| 1762 |
|
|
{
|
| 1763 |
|
|
struct sqqueue *q;
|
| 1764 |
|
|
|
| 1765 |
|
|
while ((q = net_dev->ib.sq) && (q->sqno_start == net_dev->ib.next_num || q->sqno_end <= min_sqno)) {
|
| 1766 |
|
|
int proto;
|
| 1767 |
|
|
if (q->sqno_start != net_dev->ib.next_num) {
|
| 1768 |
|
|
printk(KERN_DEBUG "ippp: MP, stepping over missing frame: %ld\n", net_dev->ib.next_num);
|
| 1769 |
|
|
#ifdef CONFIG_ISDN_PPP_VJ
|
| 1770 |
|
|
slhc_toss(ippp_table[net_dev->local.ppp_slot]->slcomp);
|
| 1771 |
|
|
#endif
|
| 1772 |
|
|
}
|
| 1773 |
|
|
proto = isdn_ppp_strip_proto(q->skb);
|
| 1774 |
|
|
isdn_ppp_push_higher(net_dev, lp, q->skb, proto);
|
| 1775 |
|
|
net_dev->ib.sq = q->next;
|
| 1776 |
|
|
net_dev->ib.next_num = q->sqno_end + 1;
|
| 1777 |
|
|
kfree(q);
|
| 1778 |
|
|
}
|
| 1779 |
|
|
}
|
| 1780 |
|
|
|
| 1781 |
|
|
/*
|
| 1782 |
|
|
* remove stale packets from list
|
| 1783 |
|
|
*/
|
| 1784 |
|
|
static void
|
| 1785 |
|
|
isdn_ppp_cleanup_mpqueue(isdn_net_dev * dev, long min_sqno)
|
| 1786 |
|
|
{
|
| 1787 |
|
|
#ifdef CONFIG_ISDN_PPP_VJ
|
| 1788 |
|
|
int toss = 0;
|
| 1789 |
|
|
#endif
|
| 1790 |
|
|
/* z.z einfaches aussortieren gammeliger pakete. Fuer die Zukunft:
|
| 1791 |
|
|
eventuell, solange vorne kein B-paket ist und sqno<=min_sqno: auch rauswerfen
|
| 1792 |
|
|
wenn sqno<min_sqno und Luecken vorhanden sind: auch weg (die koennen nicht mehr gefuellt werden)
|
| 1793 |
|
|
bei paketen groesser min_sqno: ueber mp_mrru: wenn summe ueber pktlen der rumhaengenden Pakete
|
| 1794 |
|
|
groesser als mrru ist: raus damit , Pakete muessen allerdings zusammenhaengen sonst koennte
|
| 1795 |
|
|
ja ein Paket mit B und eins mit E dazwischenpassen */
|
| 1796 |
|
|
|
| 1797 |
|
|
struct mpqueue *ql,
|
| 1798 |
|
|
*q = dev->mp_last;
|
| 1799 |
|
|
while(q && (q->sqno < min_sqno) ) {
|
| 1800 |
|
|
if ( (q->BEbyte & MP_END_FRAG) ||
|
| 1801 |
|
|
(q->next && (q->next->sqno <= min_sqno) && (q->next->BEbyte & MP_BEGIN_FRAG)) ) {
|
| 1802 |
|
|
printk(KERN_DEBUG "ippp: freeing stale packet(s), min_sq: %ld!\n",min_sqno);
|
| 1803 |
|
|
if ((dev->mp_last = q->next))
|
| 1804 |
|
|
q->next->last = NULL;
|
| 1805 |
|
|
while (q) {
|
| 1806 |
|
|
ql = q->last;
|
| 1807 |
|
|
SET_SKB_FREE(q->skb);
|
| 1808 |
|
|
printk(KERN_DEBUG "ippp, freeing packet with sqno: %ld\n",q->sqno);
|
| 1809 |
|
|
dev_kfree_skb(q->skb, 0 /* FREE_READ */ );
|
| 1810 |
|
|
kfree(q);
|
| 1811 |
|
|
#ifdef CONFIG_ISDN_PPP_VJ
|
| 1812 |
|
|
toss = 1;
|
| 1813 |
|
|
#endif
|
| 1814 |
|
|
q = ql;
|
| 1815 |
|
|
}
|
| 1816 |
|
|
q = dev->mp_last;
|
| 1817 |
|
|
} else
|
| 1818 |
|
|
q = q->next;
|
| 1819 |
|
|
}
|
| 1820 |
|
|
#ifdef CONFIG_ISDN_PPP_VJ
|
| 1821 |
|
|
/* did we free a stale frame ? */
|
| 1822 |
|
|
if (toss)
|
| 1823 |
|
|
slhc_toss(ippp_table[dev->local.ppp_slot]->slcomp);
|
| 1824 |
|
|
#endif
|
| 1825 |
|
|
}
|
| 1826 |
|
|
|
| 1827 |
|
|
/*
|
| 1828 |
|
|
* a buffered packet timed-out?
|
| 1829 |
|
|
*/
|
| 1830 |
|
|
|
| 1831 |
|
|
#endif
|
| 1832 |
|
|
|
| 1833 |
|
|
void
|
| 1834 |
|
|
isdn_ppp_timer_timeout(void)
|
| 1835 |
|
|
{
|
| 1836 |
|
|
#ifdef CONFIG_ISDN_MPP
|
| 1837 |
|
|
isdn_net_dev *net_dev = dev->netdev;
|
| 1838 |
|
|
struct sqqueue *q,
|
| 1839 |
|
|
*ql = NULL,
|
| 1840 |
|
|
*qn;
|
| 1841 |
|
|
|
| 1842 |
|
|
while (net_dev) {
|
| 1843 |
|
|
isdn_net_local *lp = &net_dev->local;
|
| 1844 |
|
|
if (net_dev->ib.modify || lp->master) { /* interface locked or slave? */
|
| 1845 |
|
|
net_dev = net_dev->next;
|
| 1846 |
|
|
continue;
|
| 1847 |
|
|
}
|
| 1848 |
|
|
q = net_dev->ib.sq;
|
| 1849 |
|
|
while (q) {
|
| 1850 |
|
|
if (q->sqno_start == net_dev->ib.next_num || q->timer < jiffies) {
|
| 1851 |
|
|
|
| 1852 |
|
|
#ifdef CONFIG_ISDN_PPP_VJ
|
| 1853 |
|
|
/* did we step over a missing frame ? */
|
| 1854 |
|
|
if (q->sqno_start != net_dev->ib.next_num)
|
| 1855 |
|
|
slhc_toss(ippp_table[lp->ppp_slot]->slcomp);
|
| 1856 |
|
|
#endif
|
| 1857 |
|
|
|
| 1858 |
|
|
ql = net_dev->ib.sq;
|
| 1859 |
|
|
net_dev->ib.sq = q->next;
|
| 1860 |
|
|
net_dev->ib.next_num = q->sqno_end + 1;
|
| 1861 |
|
|
q->next = NULL;
|
| 1862 |
|
|
for (; ql;) {
|
| 1863 |
|
|
int proto = isdn_ppp_strip_proto(ql->skb);
|
| 1864 |
|
|
isdn_ppp_push_higher(net_dev, lp, ql->skb, proto);
|
| 1865 |
|
|
qn = ql->next;
|
| 1866 |
|
|
kfree(ql);
|
| 1867 |
|
|
ql = qn;
|
| 1868 |
|
|
}
|
| 1869 |
|
|
q = net_dev->ib.sq;
|
| 1870 |
|
|
} else
|
| 1871 |
|
|
q = q->next;
|
| 1872 |
|
|
}
|
| 1873 |
|
|
net_dev = net_dev->next;
|
| 1874 |
|
|
}
|
| 1875 |
|
|
#endif
|
| 1876 |
|
|
}
|
| 1877 |
|
|
|
| 1878 |
|
|
/*
|
| 1879 |
|
|
* network device ioctl handlers
|
| 1880 |
|
|
*/
|
| 1881 |
|
|
|
| 1882 |
|
|
static int
|
| 1883 |
|
|
isdn_ppp_dev_ioctl_stats(int slot, struct ifreq *ifr, struct device *dev)
|
| 1884 |
|
|
{
|
| 1885 |
|
|
struct ppp_stats *res,
|
| 1886 |
|
|
t;
|
| 1887 |
|
|
isdn_net_local *lp = (isdn_net_local *) dev->priv;
|
| 1888 |
|
|
int err;
|
| 1889 |
|
|
|
| 1890 |
|
|
res = (struct ppp_stats *) ifr->ifr_ifru.ifru_data;
|
| 1891 |
|
|
err = verify_area(VERIFY_WRITE, res, sizeof(struct ppp_stats));
|
| 1892 |
|
|
|
| 1893 |
|
|
if (err)
|
| 1894 |
|
|
return err;
|
| 1895 |
|
|
|
| 1896 |
|
|
/* build a temporary stat struct and copy it to user space */
|
| 1897 |
|
|
|
| 1898 |
|
|
memset(&t, 0, sizeof(struct ppp_stats));
|
| 1899 |
|
|
if (dev->flags & IFF_UP) {
|
| 1900 |
|
|
t.p.ppp_ipackets = lp->stats.rx_packets;
|
| 1901 |
|
|
t.p.ppp_ierrors = lp->stats.rx_errors;
|
| 1902 |
|
|
t.p.ppp_opackets = lp->stats.tx_packets;
|
| 1903 |
|
|
t.p.ppp_oerrors = lp->stats.tx_errors;
|
| 1904 |
|
|
#ifdef CONFIG_ISDN_PPP_VJ
|
| 1905 |
|
|
if (slot >= 0 && ippp_table[slot]->slcomp) {
|
| 1906 |
|
|
struct slcompress *slcomp = ippp_table[slot]->slcomp;
|
| 1907 |
|
|
t.vj.vjs_packets = slcomp->sls_o_compressed + slcomp->sls_o_uncompressed;
|
| 1908 |
|
|
t.vj.vjs_compressed = slcomp->sls_o_compressed;
|
| 1909 |
|
|
t.vj.vjs_searches = slcomp->sls_o_searches;
|
| 1910 |
|
|
t.vj.vjs_misses = slcomp->sls_o_misses;
|
| 1911 |
|
|
t.vj.vjs_errorin = slcomp->sls_i_error;
|
| 1912 |
|
|
t.vj.vjs_tossed = slcomp->sls_i_tossed;
|
| 1913 |
|
|
t.vj.vjs_uncompressedin = slcomp->sls_i_uncompressed;
|
| 1914 |
|
|
t.vj.vjs_compressedin = slcomp->sls_i_compressed;
|
| 1915 |
|
|
}
|
| 1916 |
|
|
#endif
|
| 1917 |
|
|
}
|
| 1918 |
|
|
return copy_to_user(res, &t, sizeof(struct ppp_stats));
|
| 1919 |
|
|
}
|
| 1920 |
|
|
|
| 1921 |
|
|
int
|
| 1922 |
|
|
isdn_ppp_dev_ioctl(struct device *dev, struct ifreq *ifr, int cmd)
|
| 1923 |
|
|
{
|
| 1924 |
|
|
int error;
|
| 1925 |
|
|
char *r;
|
| 1926 |
|
|
int len;
|
| 1927 |
|
|
isdn_net_local *lp = (isdn_net_local *) dev->priv;
|
| 1928 |
|
|
|
| 1929 |
|
|
#if 0
|
| 1930 |
|
|
printk(KERN_DEBUG "ippp, dev_ioctl: cmd %#08x , %d \n", cmd, lp->ppp_slot);
|
| 1931 |
|
|
#endif
|
| 1932 |
|
|
|
| 1933 |
|
|
if (lp->p_encap != ISDN_NET_ENCAP_SYNCPPP)
|
| 1934 |
|
|
return -EINVAL;
|
| 1935 |
|
|
|
| 1936 |
|
|
switch (cmd) {
|
| 1937 |
|
|
case SIOCGPPPVER:
|
| 1938 |
|
|
r = (char *) ifr->ifr_ifru.ifru_data;
|
| 1939 |
|
|
len = strlen(PPP_VERSION) + 1;
|
| 1940 |
|
|
error = copy_to_user(r, PPP_VERSION, len);
|
| 1941 |
|
|
break;
|
| 1942 |
|
|
case SIOCGPPPSTATS:
|
| 1943 |
|
|
error = isdn_ppp_dev_ioctl_stats(lp->ppp_slot, ifr, dev);
|
| 1944 |
|
|
break;
|
| 1945 |
|
|
default:
|
| 1946 |
|
|
error = -EINVAL;
|
| 1947 |
|
|
break;
|
| 1948 |
|
|
}
|
| 1949 |
|
|
return error;
|
| 1950 |
|
|
}
|
| 1951 |
|
|
|
| 1952 |
|
|
static int
|
| 1953 |
|
|
isdn_ppp_if_get_unit(char *name)
|
| 1954 |
|
|
{
|
| 1955 |
|
|
int len,
|
| 1956 |
|
|
i,
|
| 1957 |
|
|
unit = 0,
|
| 1958 |
|
|
deci;
|
| 1959 |
|
|
|
| 1960 |
|
|
len = strlen(name);
|
| 1961 |
|
|
|
| 1962 |
|
|
if (strncmp("ippp", name, 4) || len > 8)
|
| 1963 |
|
|
return -1;
|
| 1964 |
|
|
|
| 1965 |
|
|
for (i = 0, deci = 1; i < len; i++, deci *= 10) {
|
| 1966 |
|
|
char a = name[len - i - 1];
|
| 1967 |
|
|
if (a >= '0' && a <= '9')
|
| 1968 |
|
|
unit += (a - '0') * deci;
|
| 1969 |
|
|
else
|
| 1970 |
|
|
break;
|
| 1971 |
|
|
}
|
| 1972 |
|
|
if (!i || len - i != 4)
|
| 1973 |
|
|
unit = -1;
|
| 1974 |
|
|
|
| 1975 |
|
|
return unit;
|
| 1976 |
|
|
}
|
| 1977 |
|
|
|
| 1978 |
|
|
|
| 1979 |
|
|
int
|
| 1980 |
|
|
isdn_ppp_dial_slave(char *name)
|
| 1981 |
|
|
{
|
| 1982 |
|
|
#ifdef CONFIG_ISDN_MPP
|
| 1983 |
|
|
isdn_net_dev *ndev;
|
| 1984 |
|
|
isdn_net_local *lp;
|
| 1985 |
|
|
struct device *sdev;
|
| 1986 |
|
|
|
| 1987 |
|
|
if (!(ndev = isdn_net_findif(name)))
|
| 1988 |
|
|
return 1;
|
| 1989 |
|
|
lp = &ndev->local;
|
| 1990 |
|
|
if (!(lp->flags & ISDN_NET_CONNECTED))
|
| 1991 |
|
|
return 5;
|
| 1992 |
|
|
|
| 1993 |
|
|
sdev = lp->slave;
|
| 1994 |
|
|
while (sdev) {
|
| 1995 |
|
|
isdn_net_local *mlp = (isdn_net_local *) sdev->priv;
|
| 1996 |
|
|
if (!(mlp->flags & ISDN_NET_CONNECTED))
|
| 1997 |
|
|
break;
|
| 1998 |
|
|
sdev = mlp->slave;
|
| 1999 |
|
|
}
|
| 2000 |
|
|
if (!sdev)
|
| 2001 |
|
|
return 2;
|
| 2002 |
|
|
|
| 2003 |
|
|
isdn_net_force_dial_lp((isdn_net_local *) sdev->priv);
|
| 2004 |
|
|
return 0;
|
| 2005 |
|
|
#else
|
| 2006 |
|
|
return -1;
|
| 2007 |
|
|
#endif
|
| 2008 |
|
|
}
|
| 2009 |
|
|
|
| 2010 |
|
|
int
|
| 2011 |
|
|
isdn_ppp_hangup_slave(char *name)
|
| 2012 |
|
|
{
|
| 2013 |
|
|
#ifdef CONFIG_ISDN_MPP
|
| 2014 |
|
|
isdn_net_dev *ndev;
|
| 2015 |
|
|
isdn_net_local *lp;
|
| 2016 |
|
|
struct device *sdev;
|
| 2017 |
|
|
|
| 2018 |
|
|
if (!(ndev = isdn_net_findif(name)))
|
| 2019 |
|
|
return 1;
|
| 2020 |
|
|
lp = &ndev->local;
|
| 2021 |
|
|
if (!(lp->flags & ISDN_NET_CONNECTED))
|
| 2022 |
|
|
return 5;
|
| 2023 |
|
|
|
| 2024 |
|
|
sdev = lp->slave;
|
| 2025 |
|
|
while (sdev) {
|
| 2026 |
|
|
isdn_net_local *mlp = (isdn_net_local *) sdev->priv;
|
| 2027 |
|
|
if ((mlp->flags & ISDN_NET_CONNECTED))
|
| 2028 |
|
|
break;
|
| 2029 |
|
|
sdev = mlp->slave;
|
| 2030 |
|
|
}
|
| 2031 |
|
|
if (!sdev)
|
| 2032 |
|
|
return 2;
|
| 2033 |
|
|
|
| 2034 |
|
|
isdn_net_hangup(sdev);
|
| 2035 |
|
|
return 0;
|
| 2036 |
|
|
#else
|
| 2037 |
|
|
return -1;
|
| 2038 |
|
|
#endif
|
| 2039 |
|
|
}
|
| 2040 |
|
|
|
| 2041 |
|
|
/*
|
| 2042 |
|
|
* PPP compression stuff
|
| 2043 |
|
|
*/
|
| 2044 |
|
|
static struct sk_buff *isdn_ppp_decompress(struct sk_buff *skb,struct ippp_struct *is,struct ippp_struct *master)
|
| 2045 |
|
|
{
|
| 2046 |
|
|
#if 1
|
| 2047 |
|
|
printk(KERN_ERR "compression not included!\n");
|
| 2048 |
|
|
SET_SKB_FREE(skb);
|
| 2049 |
|
|
dev_kfree_skb(skb,FREE_WRITE);
|
| 2050 |
|
|
return NULL;
|
| 2051 |
|
|
#else
|
| 2052 |
|
|
if(!master) {
|
| 2053 |
|
|
/*
|
| 2054 |
|
|
* single link compression
|
| 2055 |
|
|
*/
|
| 2056 |
|
|
if(!is->link_compressor) {
|
| 2057 |
|
|
printk(KERN_ERR "ippp: no (link) compressor defined!\n");
|
| 2058 |
|
|
SET_SKB_FREE(skb);
|
| 2059 |
|
|
dev_kfree_skb(skb,FREE_WRITE);
|
| 2060 |
|
|
return NULL;
|
| 2061 |
|
|
}
|
| 2062 |
|
|
if(!is->link_decomp_stat) {
|
| 2063 |
|
|
printk(KERN_DEBUG "ippp: initialize link compressor\n");
|
| 2064 |
|
|
}
|
| 2065 |
|
|
/*
|
| 2066 |
|
|
-> decompress link
|
| 2067 |
|
|
*/
|
| 2068 |
|
|
}
|
| 2069 |
|
|
else {
|
| 2070 |
|
|
/*
|
| 2071 |
|
|
* 'normal' or bundle-compression
|
| 2072 |
|
|
*/
|
| 2073 |
|
|
if(!master->compressor) {
|
| 2074 |
|
|
printk(KERN_ERR "ippp: no (link) compressor defined!\n");
|
| 2075 |
|
|
SET_SKB_FREE(skb);
|
| 2076 |
|
|
dev_kfree_skb(skb,FREE_WRITE);
|
| 2077 |
|
|
return NULL;
|
| 2078 |
|
|
}
|
| 2079 |
|
|
if(!master->decomp_stat) {
|
| 2080 |
|
|
#if 0
|
| 2081 |
|
|
master->decomp_stat = (master->compressor->decomp_alloc)( .. );
|
| 2082 |
|
|
#endif
|
| 2083 |
|
|
printk(KERN_DEBUG "ippp: initialize compressor\n");
|
| 2084 |
|
|
}
|
| 2085 |
|
|
}
|
| 2086 |
|
|
|
| 2087 |
|
|
return skb;
|
| 2088 |
|
|
#endif
|
| 2089 |
|
|
}
|
| 2090 |
|
|
|
| 2091 |
|
|
/*
|
| 2092 |
|
|
* compress a frame
|
| 2093 |
|
|
* type=0: normal/bundle compression
|
| 2094 |
|
|
* =1: link compression
|
| 2095 |
|
|
* returns original skb if we haven't compressed the frame
|
| 2096 |
|
|
* and a new skb pointer if we've done it
|
| 2097 |
|
|
*/
|
| 2098 |
|
|
static struct sk_buff *isdn_ppp_compress(struct sk_buff *skb_in,int *proto,
|
| 2099 |
|
|
struct ippp_struct *is,struct ippp_struct *master,int type)
|
| 2100 |
|
|
{
|
| 2101 |
|
|
#if 1
|
| 2102 |
|
|
return skb_in;
|
| 2103 |
|
|
#else
|
| 2104 |
|
|
int ret;
|
| 2105 |
|
|
int new_proto;
|
| 2106 |
|
|
struct isdn_ppp_compressor *compressor;
|
| 2107 |
|
|
void *stat;
|
| 2108 |
|
|
struct sk_buff *skb_out;
|
| 2109 |
|
|
|
| 2110 |
|
|
if(type) { /* type=1 => Link compression */
|
| 2111 |
|
|
compressor = is->link_compressor;
|
| 2112 |
|
|
stat = is->link_comp_stat;
|
| 2113 |
|
|
new_proto = PPP_LINK_COMP;
|
| 2114 |
|
|
}
|
| 2115 |
|
|
else {
|
| 2116 |
|
|
if(!master) {
|
| 2117 |
|
|
compressor = is->compressor;
|
| 2118 |
|
|
stat = is->comp_stat;
|
| 2119 |
|
|
}
|
| 2120 |
|
|
else {
|
| 2121 |
|
|
compressor = master->compressor;
|
| 2122 |
|
|
stat = master->comp_stat;
|
| 2123 |
|
|
}
|
| 2124 |
|
|
new_proto = PPP_COMP;
|
| 2125 |
|
|
}
|
| 2126 |
|
|
|
| 2127 |
|
|
if(!compressor) {
|
| 2128 |
|
|
printk(KERN_ERR "No compressor set!\n");
|
| 2129 |
|
|
return skb_in;
|
| 2130 |
|
|
}
|
| 2131 |
|
|
if(!stat) {
|
| 2132 |
|
|
/* init here ? */
|
| 2133 |
|
|
return skb_in;
|
| 2134 |
|
|
}
|
| 2135 |
|
|
|
| 2136 |
|
|
skb_out = dev_alloc_skb(skb_in->len);
|
| 2137 |
|
|
if(!skb_out)
|
| 2138 |
|
|
return skb_in;
|
| 2139 |
|
|
|
| 2140 |
|
|
ret = (compressor->compress)(stat,skb_in,skb_out,*proto);
|
| 2141 |
|
|
if(!ret) {
|
| 2142 |
|
|
SET_SKB_FREE(skb_out);
|
| 2143 |
|
|
dev_kfree_skb(skb_out,0);
|
| 2144 |
|
|
return skb_in;
|
| 2145 |
|
|
}
|
| 2146 |
|
|
|
| 2147 |
|
|
dev_kfree_skb(skb_in,FREE_WRITE);
|
| 2148 |
|
|
*proto = new_proto;
|
| 2149 |
|
|
return skb_out;
|
| 2150 |
|
|
#endif
|
| 2151 |
|
|
|
| 2152 |
|
|
}
|
| 2153 |
|
|
|
| 2154 |
|
|
/*
|
| 2155 |
|
|
* we received a CCP frame ..
|
| 2156 |
|
|
* not a clean solution, but we SHOULD handle a few cased in the kernel
|
| 2157 |
|
|
*/
|
| 2158 |
|
|
static void isdn_ppp_receive_ccp(isdn_net_dev *net_dev, isdn_net_local *lp,
|
| 2159 |
|
|
struct sk_buff *skb)
|
| 2160 |
|
|
{
|
| 2161 |
|
|
#if 0
|
| 2162 |
|
|
printk(KERN_DEBUG "isdn_ppp_receive_cpp: %02x %02x %02x %02x %02x %02x %02x %02x\n",
|
| 2163 |
|
|
skb->data[0],skb->data[1],skb->data[2],skb->data[3],
|
| 2164 |
|
|
skb->data[4],skb->data[5],skb->data[6],skb->data[7] );
|
| 2165 |
|
|
#endif
|
| 2166 |
|
|
}
|
| 2167 |
|
|
|
| 2168 |
|
|
int isdn_ppp_register_compressor(struct isdn_ppp_compressor *ipc)
|
| 2169 |
|
|
{
|
| 2170 |
|
|
ipc->next = ipc_head;
|
| 2171 |
|
|
ipc->prev = NULL;
|
| 2172 |
|
|
if(ipc_head) {
|
| 2173 |
|
|
ipc_head->prev = ipc;
|
| 2174 |
|
|
}
|
| 2175 |
|
|
ipc_head = ipc;
|
| 2176 |
|
|
return 0;
|
| 2177 |
|
|
}
|
| 2178 |
|
|
|
| 2179 |
|
|
int isdn_ppp_unregister_compressor(struct isdn_ppp_compressor *ipc)
|
| 2180 |
|
|
{
|
| 2181 |
|
|
if(ipc->prev)
|
| 2182 |
|
|
ipc->prev->next = ipc->next;
|
| 2183 |
|
|
else
|
| 2184 |
|
|
ipc_head = ipc->next;
|
| 2185 |
|
|
if(ipc->next)
|
| 2186 |
|
|
ipc->next->prev = ipc->prev;
|
| 2187 |
|
|
ipc->prev = ipc->next = NULL;
|
| 2188 |
|
|
return 0;
|
| 2189 |
|
|
}
|
| 2190 |
|
|
|
| 2191 |
|
|
static int isdn_ppp_set_compressor(struct ippp_struct *is,int num)
|
| 2192 |
|
|
{
|
| 2193 |
|
|
struct isdn_ppp_compressor *ipc = ipc_head;
|
| 2194 |
|
|
|
| 2195 |
|
|
while(ipc) {
|
| 2196 |
|
|
if(ipc->num == num) {
|
| 2197 |
|
|
return 0;
|
| 2198 |
|
|
is->compressor = ipc;
|
| 2199 |
|
|
is->link_compressor = ipc;
|
| 2200 |
|
|
}
|
| 2201 |
|
|
ipc = ipc->next;
|
| 2202 |
|
|
}
|
| 2203 |
|
|
return -EINVAL;
|
| 2204 |
|
|
}
|
| 2205 |
|
|
|
| 2206 |
|
|
|
| 2207 |
|
|
#if 0
|
| 2208 |
|
|
static struct symbol_table isdn_ppp_syms =
|
| 2209 |
|
|
{
|
| 2210 |
|
|
#include <linux/symtab_begin.h>
|
| 2211 |
|
|
X(isdn_ppp_register_compressor),
|
| 2212 |
|
|
X(isdn_ppp_unregister_compressor),
|
| 2213 |
|
|
#include <linux/symtab_end.h>
|
| 2214 |
|
|
};
|
| 2215 |
|
|
#endif
|
| 2216 |
|
|
|
| 2217 |
|
|
|
| 2218 |
|
|
|
| 2219 |
|
|
|
