3233 lines
85 KiB
C
3233 lines
85 KiB
C
/* $Id: isdn_net.c,v 1.1.2.2 2004/01/12 22:37:19 keil Exp $
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*
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* Linux ISDN subsystem, network interfaces and related functions (linklevel).
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*
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* Copyright 1994-1998 by Fritz Elfert (fritz@isdn4linux.de)
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* Copyright 1995,96 by Thinking Objects Software GmbH Wuerzburg
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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 software may be used and distributed according to the terms
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* of the GNU General Public License, incorporated herein by reference.
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*
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* Data Over Voice (DOV) support added - Guy Ellis 23-Mar-02
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* guy@traverse.com.au
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* Outgoing calls - looks for a 'V' in first char of dialed number
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* Incoming calls - checks first character of eaz as follows:
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* Numeric - accept DATA only - original functionality
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* 'V' - accept VOICE (DOV) only
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* 'B' - accept BOTH DATA and DOV types
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*
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* Jan 2001: fix CISCO HDLC Bjoern A. Zeeb <i4l@zabbadoz.net>
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* for info on the protocol, see
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* http://i4l.zabbadoz.net/i4l/cisco-hdlc.txt
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*/
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#include <linux/isdn.h>
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#include <linux/slab.h>
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#include <net/arp.h>
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#include <net/dst.h>
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#include <net/pkt_sched.h>
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#include <linux/inetdevice.h>
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#include "isdn_common.h"
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#include "isdn_net.h"
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#ifdef CONFIG_ISDN_PPP
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#include "isdn_ppp.h"
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#endif
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#ifdef CONFIG_ISDN_X25
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#include <linux/concap.h>
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#include "isdn_concap.h"
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#endif
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/*
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* Outline of new tbusy handling:
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*
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* Old method, roughly spoken, consisted of setting tbusy when entering
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* isdn_net_start_xmit() and at several other locations and clearing
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* it from isdn_net_start_xmit() thread when sending was successful.
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*
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* With 2.3.x multithreaded network core, to prevent problems, tbusy should
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* only be set by the isdn_net_start_xmit() thread and only when a tx-busy
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* condition is detected. Other threads (in particular isdn_net_stat_callb())
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* are only allowed to clear tbusy.
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*
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* -HE
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*/
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/*
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* About SOFTNET:
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* Most of the changes were pretty obvious and basically done by HE already.
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*
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* One problem of the isdn net device code is that is uses struct net_device
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* for masters and slaves. However, only master interface are registered to
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* the network layer, and therefore, it only makes sense to call netif_*
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* functions on them.
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*
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* --KG
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*/
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/*
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* Find out if the netdevice has been ifup-ed yet.
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* For slaves, look at the corresponding master.
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*/
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static __inline__ int isdn_net_device_started(isdn_net_dev *n)
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{
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isdn_net_local *lp = n->local;
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struct net_device *dev;
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if (lp->master)
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dev = lp->master;
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else
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dev = n->dev;
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return netif_running(dev);
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}
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/*
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* wake up the network -> net_device queue.
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* For slaves, wake the corresponding master interface.
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*/
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static __inline__ void isdn_net_device_wake_queue(isdn_net_local *lp)
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{
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if (lp->master)
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netif_wake_queue(lp->master);
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else
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netif_wake_queue(lp->netdev->dev);
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}
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/*
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* stop the network -> net_device queue.
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* For slaves, stop the corresponding master interface.
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*/
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static __inline__ void isdn_net_device_stop_queue(isdn_net_local *lp)
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{
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if (lp->master)
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netif_stop_queue(lp->master);
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else
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netif_stop_queue(lp->netdev->dev);
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}
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/*
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* find out if the net_device which this lp belongs to (lp can be
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* master or slave) is busy. It's busy iff all (master and slave)
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* queues are busy
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*/
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static __inline__ int isdn_net_device_busy(isdn_net_local *lp)
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{
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isdn_net_local *nlp;
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isdn_net_dev *nd;
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unsigned long flags;
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if (!isdn_net_lp_busy(lp))
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return 0;
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if (lp->master)
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nd = ISDN_MASTER_PRIV(lp)->netdev;
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else
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nd = lp->netdev;
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spin_lock_irqsave(&nd->queue_lock, flags);
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nlp = lp->next;
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while (nlp != lp) {
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if (!isdn_net_lp_busy(nlp)) {
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spin_unlock_irqrestore(&nd->queue_lock, flags);
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return 0;
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}
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nlp = nlp->next;
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}
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spin_unlock_irqrestore(&nd->queue_lock, flags);
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return 1;
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}
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static __inline__ void isdn_net_inc_frame_cnt(isdn_net_local *lp)
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{
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atomic_inc(&lp->frame_cnt);
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if (isdn_net_device_busy(lp))
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isdn_net_device_stop_queue(lp);
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}
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static __inline__ void isdn_net_dec_frame_cnt(isdn_net_local *lp)
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{
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atomic_dec(&lp->frame_cnt);
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if (!(isdn_net_device_busy(lp))) {
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if (!skb_queue_empty(&lp->super_tx_queue)) {
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schedule_work(&lp->tqueue);
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} else {
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isdn_net_device_wake_queue(lp);
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}
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}
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}
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static __inline__ void isdn_net_zero_frame_cnt(isdn_net_local *lp)
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{
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atomic_set(&lp->frame_cnt, 0);
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}
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/* For 2.2.x we leave the transmitter busy timeout at 2 secs, just
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* to be safe.
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* For 2.3.x we push it up to 20 secs, because call establishment
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* (in particular callback) may take such a long time, and we
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* don't want confusing messages in the log. However, there is a slight
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* possibility that this large timeout will break other things like MPPP,
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* which might rely on the tx timeout. If so, we'll find out this way...
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*/
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#define ISDN_NET_TX_TIMEOUT (20 * HZ)
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/* Prototypes */
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static int isdn_net_force_dial_lp(isdn_net_local *);
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static netdev_tx_t isdn_net_start_xmit(struct sk_buff *,
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struct net_device *);
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static void isdn_net_ciscohdlck_connected(isdn_net_local *lp);
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static void isdn_net_ciscohdlck_disconnected(isdn_net_local *lp);
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char *isdn_net_revision = "$Revision: 1.1.2.2 $";
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/*
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* Code for raw-networking over ISDN
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*/
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static void
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isdn_net_unreachable(struct net_device *dev, struct sk_buff *skb, char *reason)
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{
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if (skb) {
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u_short proto = ntohs(skb->protocol);
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printk(KERN_DEBUG "isdn_net: %s: %s, signalling dst_link_failure %s\n",
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dev->name,
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(reason != NULL) ? reason : "unknown",
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(proto != ETH_P_IP) ? "Protocol != ETH_P_IP" : "");
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dst_link_failure(skb);
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}
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else { /* dial not triggered by rawIP packet */
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printk(KERN_DEBUG "isdn_net: %s: %s\n",
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dev->name,
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(reason != NULL) ? reason : "reason unknown");
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}
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}
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static void
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isdn_net_reset(struct net_device *dev)
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{
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#ifdef CONFIG_ISDN_X25
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struct concap_device_ops *dops =
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((isdn_net_local *)netdev_priv(dev))->dops;
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struct concap_proto *cprot =
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((isdn_net_local *)netdev_priv(dev))->netdev->cprot;
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#endif
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#ifdef CONFIG_ISDN_X25
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if (cprot && cprot->pops && dops)
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cprot->pops->restart(cprot, dev, dops);
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#endif
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}
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/* Open/initialize the board. */
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static int
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isdn_net_open(struct net_device *dev)
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{
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int i;
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struct net_device *p;
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struct in_device *in_dev;
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/* moved here from isdn_net_reset, because only the master has an
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interface associated which is supposed to be started. BTW:
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we need to call netif_start_queue, not netif_wake_queue here */
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netif_start_queue(dev);
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isdn_net_reset(dev);
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/* Fill in the MAC-level header (not needed, but for compatibility... */
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for (i = 0; i < ETH_ALEN - sizeof(u32); i++)
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dev->dev_addr[i] = 0xfc;
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if ((in_dev = dev->ip_ptr) != NULL) {
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/*
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* Any address will do - we take the first
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*/
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struct in_ifaddr *ifa = in_dev->ifa_list;
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if (ifa != NULL)
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memcpy(dev->dev_addr + 2, &ifa->ifa_local, 4);
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}
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/* If this interface has slaves, start them also */
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p = MASTER_TO_SLAVE(dev);
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if (p) {
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while (p) {
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isdn_net_reset(p);
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p = MASTER_TO_SLAVE(p);
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}
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}
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isdn_lock_drivers();
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return 0;
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}
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/*
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* Assign an ISDN-channel to a net-interface
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*/
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static void
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isdn_net_bind_channel(isdn_net_local *lp, int idx)
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{
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lp->flags |= ISDN_NET_CONNECTED;
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lp->isdn_device = dev->drvmap[idx];
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lp->isdn_channel = dev->chanmap[idx];
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dev->rx_netdev[idx] = lp->netdev;
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dev->st_netdev[idx] = lp->netdev;
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}
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/*
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* unbind a net-interface (resets interface after an error)
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*/
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static void
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isdn_net_unbind_channel(isdn_net_local *lp)
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{
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skb_queue_purge(&lp->super_tx_queue);
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if (!lp->master) { /* reset only master device */
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/* Moral equivalent of dev_purge_queues():
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BEWARE! This chunk of code cannot be called from hardware
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interrupt handler. I hope it is true. --ANK
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*/
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qdisc_reset_all_tx(lp->netdev->dev);
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}
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lp->dialstate = 0;
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dev->rx_netdev[isdn_dc2minor(lp->isdn_device, lp->isdn_channel)] = NULL;
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dev->st_netdev[isdn_dc2minor(lp->isdn_device, lp->isdn_channel)] = NULL;
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if (lp->isdn_device != -1 && lp->isdn_channel != -1)
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isdn_free_channel(lp->isdn_device, lp->isdn_channel,
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ISDN_USAGE_NET);
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lp->flags &= ~ISDN_NET_CONNECTED;
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lp->isdn_device = -1;
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lp->isdn_channel = -1;
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}
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/*
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* Perform auto-hangup and cps-calculation for net-interfaces.
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*
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* auto-hangup:
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* Increment idle-counter (this counter is reset on any incoming or
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* outgoing packet), if counter exceeds configured limit either do a
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* hangup immediately or - if configured - wait until just before the next
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* charge-info.
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*
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* cps-calculation (needed for dynamic channel-bundling):
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* Since this function is called every second, simply reset the
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* byte-counter of the interface after copying it to the cps-variable.
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*/
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static unsigned long last_jiffies = -HZ;
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void
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isdn_net_autohup(void)
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{
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isdn_net_dev *p = dev->netdev;
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int anymore;
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anymore = 0;
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while (p) {
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isdn_net_local *l = p->local;
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if (jiffies == last_jiffies)
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l->cps = l->transcount;
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else
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l->cps = (l->transcount * HZ) / (jiffies - last_jiffies);
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l->transcount = 0;
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if (dev->net_verbose > 3)
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printk(KERN_DEBUG "%s: %d bogocps\n", p->dev->name, l->cps);
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if ((l->flags & ISDN_NET_CONNECTED) && (!l->dialstate)) {
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anymore = 1;
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l->huptimer++;
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/*
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* if there is some dialmode where timeout-hangup
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* should _not_ be done, check for that here
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*/
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if ((l->onhtime) &&
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(l->huptimer > l->onhtime))
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{
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if (l->hupflags & ISDN_MANCHARGE &&
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l->hupflags & ISDN_CHARGEHUP) {
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while (time_after(jiffies, l->chargetime + l->chargeint))
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l->chargetime += l->chargeint;
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if (time_after(jiffies, l->chargetime + l->chargeint - 2 * HZ))
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if (l->outgoing || l->hupflags & ISDN_INHUP)
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isdn_net_hangup(p->dev);
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} else if (l->outgoing) {
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if (l->hupflags & ISDN_CHARGEHUP) {
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if (l->hupflags & ISDN_WAITCHARGE) {
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printk(KERN_DEBUG "isdn_net: Hupflags of %s are %X\n",
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p->dev->name, l->hupflags);
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isdn_net_hangup(p->dev);
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} else if (time_after(jiffies, l->chargetime + l->chargeint)) {
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printk(KERN_DEBUG
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"isdn_net: %s: chtime = %lu, chint = %d\n",
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p->dev->name, l->chargetime, l->chargeint);
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isdn_net_hangup(p->dev);
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}
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} else
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isdn_net_hangup(p->dev);
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} else if (l->hupflags & ISDN_INHUP)
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isdn_net_hangup(p->dev);
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}
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if (dev->global_flags & ISDN_GLOBAL_STOPPED || (ISDN_NET_DIALMODE(*l) == ISDN_NET_DM_OFF)) {
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isdn_net_hangup(p->dev);
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break;
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}
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}
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p = (isdn_net_dev *) p->next;
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}
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last_jiffies = jiffies;
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isdn_timer_ctrl(ISDN_TIMER_NETHANGUP, anymore);
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}
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static void isdn_net_lp_disconnected(isdn_net_local *lp)
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{
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isdn_net_rm_from_bundle(lp);
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}
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/*
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* Handle status-messages from ISDN-interfacecard.
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* This function is called from within the main-status-dispatcher
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* isdn_status_callback, which itself is called from the low-level driver.
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* Return: 1 = Event handled, 0 = not for us or unknown Event.
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*/
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int
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isdn_net_stat_callback(int idx, isdn_ctrl *c)
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{
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isdn_net_dev *p = dev->st_netdev[idx];
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int cmd = c->command;
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if (p) {
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isdn_net_local *lp = p->local;
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#ifdef CONFIG_ISDN_X25
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struct concap_proto *cprot = lp->netdev->cprot;
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struct concap_proto_ops *pops = cprot ? cprot->pops : NULL;
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#endif
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switch (cmd) {
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case ISDN_STAT_BSENT:
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/* A packet has successfully been sent out */
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if ((lp->flags & ISDN_NET_CONNECTED) &&
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(!lp->dialstate)) {
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isdn_net_dec_frame_cnt(lp);
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lp->stats.tx_packets++;
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lp->stats.tx_bytes += c->parm.length;
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}
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return 1;
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case ISDN_STAT_DCONN:
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/* D-Channel is up */
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switch (lp->dialstate) {
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case 4:
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case 7:
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case 8:
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lp->dialstate++;
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return 1;
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case 12:
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lp->dialstate = 5;
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return 1;
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}
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break;
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case ISDN_STAT_DHUP:
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/* Either D-Channel-hangup or error during dialout */
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#ifdef CONFIG_ISDN_X25
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/* If we are not connencted then dialing had
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failed. If there are generic encap protocol
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receiver routines signal the closure of
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the link*/
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if (!(lp->flags & ISDN_NET_CONNECTED)
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&& pops && pops->disconn_ind)
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pops->disconn_ind(cprot);
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#endif /* CONFIG_ISDN_X25 */
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if ((!lp->dialstate) && (lp->flags & ISDN_NET_CONNECTED)) {
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if (lp->p_encap == ISDN_NET_ENCAP_CISCOHDLCK)
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isdn_net_ciscohdlck_disconnected(lp);
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#ifdef CONFIG_ISDN_PPP
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if (lp->p_encap == ISDN_NET_ENCAP_SYNCPPP)
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isdn_ppp_free(lp);
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#endif
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isdn_net_lp_disconnected(lp);
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isdn_all_eaz(lp->isdn_device, lp->isdn_channel);
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printk(KERN_INFO "%s: remote hangup\n", p->dev->name);
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printk(KERN_INFO "%s: Chargesum is %d\n", p->dev->name,
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lp->charge);
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isdn_net_unbind_channel(lp);
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return 1;
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}
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break;
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#ifdef CONFIG_ISDN_X25
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case ISDN_STAT_BHUP:
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/* B-Channel-hangup */
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/* try if there are generic encap protocol
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receiver routines and signal the closure of
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the link */
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if (pops && pops->disconn_ind) {
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pops->disconn_ind(cprot);
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return 1;
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}
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break;
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#endif /* CONFIG_ISDN_X25 */
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case ISDN_STAT_BCONN:
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/* B-Channel is up */
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isdn_net_zero_frame_cnt(lp);
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switch (lp->dialstate) {
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case 5:
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case 6:
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case 7:
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case 8:
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case 9:
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case 10:
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case 12:
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if (lp->dialstate <= 6) {
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dev->usage[idx] |= ISDN_USAGE_OUTGOING;
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isdn_info_update();
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} else
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dev->rx_netdev[idx] = p;
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lp->dialstate = 0;
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isdn_timer_ctrl(ISDN_TIMER_NETHANGUP, 1);
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if (lp->p_encap == ISDN_NET_ENCAP_CISCOHDLCK)
|
|
isdn_net_ciscohdlck_connected(lp);
|
|
if (lp->p_encap != ISDN_NET_ENCAP_SYNCPPP) {
|
|
if (lp->master) { /* is lp a slave? */
|
|
isdn_net_dev *nd = ISDN_MASTER_PRIV(lp)->netdev;
|
|
isdn_net_add_to_bundle(nd, lp);
|
|
}
|
|
}
|
|
printk(KERN_INFO "isdn_net: %s connected\n", p->dev->name);
|
|
/* If first Chargeinfo comes before B-Channel connect,
|
|
* we correct the timestamp here.
|
|
*/
|
|
lp->chargetime = jiffies;
|
|
|
|
/* reset dial-timeout */
|
|
lp->dialstarted = 0;
|
|
lp->dialwait_timer = 0;
|
|
|
|
#ifdef CONFIG_ISDN_PPP
|
|
if (lp->p_encap == ISDN_NET_ENCAP_SYNCPPP)
|
|
isdn_ppp_wakeup_daemon(lp);
|
|
#endif
|
|
#ifdef CONFIG_ISDN_X25
|
|
/* try if there are generic concap receiver routines */
|
|
if (pops)
|
|
if (pops->connect_ind)
|
|
pops->connect_ind(cprot);
|
|
#endif /* CONFIG_ISDN_X25 */
|
|
/* ppp needs to do negotiations first */
|
|
if (lp->p_encap != ISDN_NET_ENCAP_SYNCPPP)
|
|
isdn_net_device_wake_queue(lp);
|
|
return 1;
|
|
}
|
|
break;
|
|
case ISDN_STAT_NODCH:
|
|
/* No D-Channel avail. */
|
|
if (lp->dialstate == 4) {
|
|
lp->dialstate--;
|
|
return 1;
|
|
}
|
|
break;
|
|
case ISDN_STAT_CINF:
|
|
/* Charge-info from TelCo. Calculate interval between
|
|
* charge-infos and set timestamp for last info for
|
|
* usage by isdn_net_autohup()
|
|
*/
|
|
lp->charge++;
|
|
if (lp->hupflags & ISDN_HAVECHARGE) {
|
|
lp->hupflags &= ~ISDN_WAITCHARGE;
|
|
lp->chargeint = jiffies - lp->chargetime - (2 * HZ);
|
|
}
|
|
if (lp->hupflags & ISDN_WAITCHARGE)
|
|
lp->hupflags |= ISDN_HAVECHARGE;
|
|
lp->chargetime = jiffies;
|
|
printk(KERN_DEBUG "isdn_net: Got CINF chargetime of %s now %lu\n",
|
|
p->dev->name, lp->chargetime);
|
|
return 1;
|
|
}
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* Perform dialout for net-interfaces and timeout-handling for
|
|
* D-Channel-up and B-Channel-up Messages.
|
|
* This function is initially called from within isdn_net_start_xmit() or
|
|
* or isdn_net_find_icall() after initializing the dialstate for an
|
|
* interface. If further calls are needed, the function schedules itself
|
|
* for a timer-callback via isdn_timer_function().
|
|
* The dialstate is also affected by incoming status-messages from
|
|
* the ISDN-Channel which are handled in isdn_net_stat_callback() above.
|
|
*/
|
|
void
|
|
isdn_net_dial(void)
|
|
{
|
|
isdn_net_dev *p = dev->netdev;
|
|
int anymore = 0;
|
|
int i;
|
|
isdn_ctrl cmd;
|
|
u_char *phone_number;
|
|
|
|
while (p) {
|
|
isdn_net_local *lp = p->local;
|
|
|
|
#ifdef ISDN_DEBUG_NET_DIAL
|
|
if (lp->dialstate)
|
|
printk(KERN_DEBUG "%s: dialstate=%d\n", p->dev->name, lp->dialstate);
|
|
#endif
|
|
switch (lp->dialstate) {
|
|
case 0:
|
|
/* Nothing to do for this interface */
|
|
break;
|
|
case 1:
|
|
/* Initiate dialout. Set phone-number-pointer to first number
|
|
* of interface.
|
|
*/
|
|
lp->dial = lp->phone[1];
|
|
if (!lp->dial) {
|
|
printk(KERN_WARNING "%s: phone number deleted?\n",
|
|
p->dev->name);
|
|
isdn_net_hangup(p->dev);
|
|
break;
|
|
}
|
|
anymore = 1;
|
|
|
|
if (lp->dialtimeout > 0)
|
|
if (lp->dialstarted == 0 || time_after(jiffies, lp->dialstarted + lp->dialtimeout + lp->dialwait)) {
|
|
lp->dialstarted = jiffies;
|
|
lp->dialwait_timer = 0;
|
|
}
|
|
|
|
lp->dialstate++;
|
|
/* Fall through */
|
|
case 2:
|
|
/* Prepare dialing. Clear EAZ, then set EAZ. */
|
|
cmd.driver = lp->isdn_device;
|
|
cmd.arg = lp->isdn_channel;
|
|
cmd.command = ISDN_CMD_CLREAZ;
|
|
isdn_command(&cmd);
|
|
sprintf(cmd.parm.num, "%s", isdn_map_eaz2msn(lp->msn, cmd.driver));
|
|
cmd.command = ISDN_CMD_SETEAZ;
|
|
isdn_command(&cmd);
|
|
lp->dialretry = 0;
|
|
anymore = 1;
|
|
lp->dialstate++;
|
|
/* Fall through */
|
|
case 3:
|
|
/* Setup interface, dial current phone-number, switch to next number.
|
|
* If list of phone-numbers is exhausted, increment
|
|
* retry-counter.
|
|
*/
|
|
if (dev->global_flags & ISDN_GLOBAL_STOPPED || (ISDN_NET_DIALMODE(*lp) == ISDN_NET_DM_OFF)) {
|
|
char *s;
|
|
if (dev->global_flags & ISDN_GLOBAL_STOPPED)
|
|
s = "dial suppressed: isdn system stopped";
|
|
else
|
|
s = "dial suppressed: dialmode `off'";
|
|
isdn_net_unreachable(p->dev, NULL, s);
|
|
isdn_net_hangup(p->dev);
|
|
break;
|
|
}
|
|
cmd.driver = lp->isdn_device;
|
|
cmd.command = ISDN_CMD_SETL2;
|
|
cmd.arg = lp->isdn_channel + (lp->l2_proto << 8);
|
|
isdn_command(&cmd);
|
|
cmd.driver = lp->isdn_device;
|
|
cmd.command = ISDN_CMD_SETL3;
|
|
cmd.arg = lp->isdn_channel + (lp->l3_proto << 8);
|
|
isdn_command(&cmd);
|
|
cmd.driver = lp->isdn_device;
|
|
cmd.arg = lp->isdn_channel;
|
|
if (!lp->dial) {
|
|
printk(KERN_WARNING "%s: phone number deleted?\n",
|
|
p->dev->name);
|
|
isdn_net_hangup(p->dev);
|
|
break;
|
|
}
|
|
if (!strncmp(lp->dial->num, "LEASED", strlen("LEASED"))) {
|
|
lp->dialstate = 4;
|
|
printk(KERN_INFO "%s: Open leased line ...\n", p->dev->name);
|
|
} else {
|
|
if (lp->dialtimeout > 0)
|
|
if (time_after(jiffies, lp->dialstarted + lp->dialtimeout)) {
|
|
lp->dialwait_timer = jiffies + lp->dialwait;
|
|
lp->dialstarted = 0;
|
|
isdn_net_unreachable(p->dev, NULL, "dial: timed out");
|
|
isdn_net_hangup(p->dev);
|
|
break;
|
|
}
|
|
|
|
cmd.driver = lp->isdn_device;
|
|
cmd.command = ISDN_CMD_DIAL;
|
|
cmd.parm.setup.si2 = 0;
|
|
|
|
/* check for DOV */
|
|
phone_number = lp->dial->num;
|
|
if ((*phone_number == 'v') ||
|
|
(*phone_number == 'V')) { /* DOV call */
|
|
cmd.parm.setup.si1 = 1;
|
|
} else { /* DATA call */
|
|
cmd.parm.setup.si1 = 7;
|
|
}
|
|
|
|
strcpy(cmd.parm.setup.phone, phone_number);
|
|
/*
|
|
* Switch to next number or back to start if at end of list.
|
|
*/
|
|
if (!(lp->dial = (isdn_net_phone *) lp->dial->next)) {
|
|
lp->dial = lp->phone[1];
|
|
lp->dialretry++;
|
|
|
|
if (lp->dialretry > lp->dialmax) {
|
|
if (lp->dialtimeout == 0) {
|
|
lp->dialwait_timer = jiffies + lp->dialwait;
|
|
lp->dialstarted = 0;
|
|
isdn_net_unreachable(p->dev, NULL, "dial: tried all numbers dialmax times");
|
|
}
|
|
isdn_net_hangup(p->dev);
|
|
break;
|
|
}
|
|
}
|
|
sprintf(cmd.parm.setup.eazmsn, "%s",
|
|
isdn_map_eaz2msn(lp->msn, cmd.driver));
|
|
i = isdn_dc2minor(lp->isdn_device, lp->isdn_channel);
|
|
if (i >= 0) {
|
|
strcpy(dev->num[i], cmd.parm.setup.phone);
|
|
dev->usage[i] |= ISDN_USAGE_OUTGOING;
|
|
isdn_info_update();
|
|
}
|
|
printk(KERN_INFO "%s: dialing %d %s... %s\n", p->dev->name,
|
|
lp->dialretry, cmd.parm.setup.phone,
|
|
(cmd.parm.setup.si1 == 1) ? "DOV" : "");
|
|
lp->dtimer = 0;
|
|
#ifdef ISDN_DEBUG_NET_DIAL
|
|
printk(KERN_DEBUG "dial: d=%d c=%d\n", lp->isdn_device,
|
|
lp->isdn_channel);
|
|
#endif
|
|
isdn_command(&cmd);
|
|
}
|
|
lp->huptimer = 0;
|
|
lp->outgoing = 1;
|
|
if (lp->chargeint) {
|
|
lp->hupflags |= ISDN_HAVECHARGE;
|
|
lp->hupflags &= ~ISDN_WAITCHARGE;
|
|
} else {
|
|
lp->hupflags |= ISDN_WAITCHARGE;
|
|
lp->hupflags &= ~ISDN_HAVECHARGE;
|
|
}
|
|
anymore = 1;
|
|
lp->dialstate =
|
|
(lp->cbdelay &&
|
|
(lp->flags & ISDN_NET_CBOUT)) ? 12 : 4;
|
|
break;
|
|
case 4:
|
|
/* Wait for D-Channel-connect.
|
|
* If timeout, switch back to state 3.
|
|
* Dialmax-handling moved to state 3.
|
|
*/
|
|
if (lp->dtimer++ > ISDN_TIMER_DTIMEOUT10)
|
|
lp->dialstate = 3;
|
|
anymore = 1;
|
|
break;
|
|
case 5:
|
|
/* Got D-Channel-Connect, send B-Channel-request */
|
|
cmd.driver = lp->isdn_device;
|
|
cmd.arg = lp->isdn_channel;
|
|
cmd.command = ISDN_CMD_ACCEPTB;
|
|
anymore = 1;
|
|
lp->dtimer = 0;
|
|
lp->dialstate++;
|
|
isdn_command(&cmd);
|
|
break;
|
|
case 6:
|
|
/* Wait for B- or D-Channel-connect. If timeout,
|
|
* switch back to state 3.
|
|
*/
|
|
#ifdef ISDN_DEBUG_NET_DIAL
|
|
printk(KERN_DEBUG "dialtimer2: %d\n", lp->dtimer);
|
|
#endif
|
|
if (lp->dtimer++ > ISDN_TIMER_DTIMEOUT10)
|
|
lp->dialstate = 3;
|
|
anymore = 1;
|
|
break;
|
|
case 7:
|
|
/* Got incoming Call, setup L2 and L3 protocols,
|
|
* then wait for D-Channel-connect
|
|
*/
|
|
#ifdef ISDN_DEBUG_NET_DIAL
|
|
printk(KERN_DEBUG "dialtimer4: %d\n", lp->dtimer);
|
|
#endif
|
|
cmd.driver = lp->isdn_device;
|
|
cmd.command = ISDN_CMD_SETL2;
|
|
cmd.arg = lp->isdn_channel + (lp->l2_proto << 8);
|
|
isdn_command(&cmd);
|
|
cmd.driver = lp->isdn_device;
|
|
cmd.command = ISDN_CMD_SETL3;
|
|
cmd.arg = lp->isdn_channel + (lp->l3_proto << 8);
|
|
isdn_command(&cmd);
|
|
if (lp->dtimer++ > ISDN_TIMER_DTIMEOUT15)
|
|
isdn_net_hangup(p->dev);
|
|
else {
|
|
anymore = 1;
|
|
lp->dialstate++;
|
|
}
|
|
break;
|
|
case 9:
|
|
/* Got incoming D-Channel-Connect, send B-Channel-request */
|
|
cmd.driver = lp->isdn_device;
|
|
cmd.arg = lp->isdn_channel;
|
|
cmd.command = ISDN_CMD_ACCEPTB;
|
|
isdn_command(&cmd);
|
|
anymore = 1;
|
|
lp->dtimer = 0;
|
|
lp->dialstate++;
|
|
break;
|
|
case 8:
|
|
case 10:
|
|
/* Wait for B- or D-channel-connect */
|
|
#ifdef ISDN_DEBUG_NET_DIAL
|
|
printk(KERN_DEBUG "dialtimer4: %d\n", lp->dtimer);
|
|
#endif
|
|
if (lp->dtimer++ > ISDN_TIMER_DTIMEOUT10)
|
|
isdn_net_hangup(p->dev);
|
|
else
|
|
anymore = 1;
|
|
break;
|
|
case 11:
|
|
/* Callback Delay */
|
|
if (lp->dtimer++ > lp->cbdelay)
|
|
lp->dialstate = 1;
|
|
anymore = 1;
|
|
break;
|
|
case 12:
|
|
/* Remote does callback. Hangup after cbdelay, then wait for incoming
|
|
* call (in state 4).
|
|
*/
|
|
if (lp->dtimer++ > lp->cbdelay)
|
|
{
|
|
printk(KERN_INFO "%s: hangup waiting for callback ...\n", p->dev->name);
|
|
lp->dtimer = 0;
|
|
lp->dialstate = 4;
|
|
cmd.driver = lp->isdn_device;
|
|
cmd.command = ISDN_CMD_HANGUP;
|
|
cmd.arg = lp->isdn_channel;
|
|
isdn_command(&cmd);
|
|
isdn_all_eaz(lp->isdn_device, lp->isdn_channel);
|
|
}
|
|
anymore = 1;
|
|
break;
|
|
default:
|
|
printk(KERN_WARNING "isdn_net: Illegal dialstate %d for device %s\n",
|
|
lp->dialstate, p->dev->name);
|
|
}
|
|
p = (isdn_net_dev *) p->next;
|
|
}
|
|
isdn_timer_ctrl(ISDN_TIMER_NETDIAL, anymore);
|
|
}
|
|
|
|
/*
|
|
* Perform hangup for a net-interface.
|
|
*/
|
|
void
|
|
isdn_net_hangup(struct net_device *d)
|
|
{
|
|
isdn_net_local *lp = netdev_priv(d);
|
|
isdn_ctrl cmd;
|
|
#ifdef CONFIG_ISDN_X25
|
|
struct concap_proto *cprot = lp->netdev->cprot;
|
|
struct concap_proto_ops *pops = cprot ? cprot->pops : NULL;
|
|
#endif
|
|
|
|
if (lp->flags & ISDN_NET_CONNECTED) {
|
|
if (lp->slave != NULL) {
|
|
isdn_net_local *slp = ISDN_SLAVE_PRIV(lp);
|
|
if (slp->flags & ISDN_NET_CONNECTED) {
|
|
printk(KERN_INFO
|
|
"isdn_net: hang up slave %s before %s\n",
|
|
lp->slave->name, d->name);
|
|
isdn_net_hangup(lp->slave);
|
|
}
|
|
}
|
|
printk(KERN_INFO "isdn_net: local hangup %s\n", d->name);
|
|
#ifdef CONFIG_ISDN_PPP
|
|
if (lp->p_encap == ISDN_NET_ENCAP_SYNCPPP)
|
|
isdn_ppp_free(lp);
|
|
#endif
|
|
isdn_net_lp_disconnected(lp);
|
|
#ifdef CONFIG_ISDN_X25
|
|
/* try if there are generic encap protocol
|
|
receiver routines and signal the closure of
|
|
the link */
|
|
if (pops && pops->disconn_ind)
|
|
pops->disconn_ind(cprot);
|
|
#endif /* CONFIG_ISDN_X25 */
|
|
|
|
cmd.driver = lp->isdn_device;
|
|
cmd.command = ISDN_CMD_HANGUP;
|
|
cmd.arg = lp->isdn_channel;
|
|
isdn_command(&cmd);
|
|
printk(KERN_INFO "%s: Chargesum is %d\n", d->name, lp->charge);
|
|
isdn_all_eaz(lp->isdn_device, lp->isdn_channel);
|
|
}
|
|
isdn_net_unbind_channel(lp);
|
|
}
|
|
|
|
typedef struct {
|
|
__be16 source;
|
|
__be16 dest;
|
|
} ip_ports;
|
|
|
|
static void
|
|
isdn_net_log_skb(struct sk_buff *skb, isdn_net_local *lp)
|
|
{
|
|
/* hopefully, this was set correctly */
|
|
const u_char *p = skb_network_header(skb);
|
|
unsigned short proto = ntohs(skb->protocol);
|
|
int data_ofs;
|
|
ip_ports *ipp;
|
|
char addinfo[100];
|
|
|
|
addinfo[0] = '\0';
|
|
/* This check stolen from 2.1.72 dev_queue_xmit_nit() */
|
|
if (p < skb->data || skb_network_header(skb) >= skb_tail_pointer(skb)) {
|
|
/* fall back to old isdn_net_log_packet method() */
|
|
char *buf = skb->data;
|
|
|
|
printk(KERN_DEBUG "isdn_net: protocol %04x is buggy, dev %s\n", skb->protocol, lp->netdev->dev->name);
|
|
p = buf;
|
|
proto = ETH_P_IP;
|
|
switch (lp->p_encap) {
|
|
case ISDN_NET_ENCAP_IPTYP:
|
|
proto = ntohs(*(__be16 *)&buf[0]);
|
|
p = &buf[2];
|
|
break;
|
|
case ISDN_NET_ENCAP_ETHER:
|
|
proto = ntohs(*(__be16 *)&buf[12]);
|
|
p = &buf[14];
|
|
break;
|
|
case ISDN_NET_ENCAP_CISCOHDLC:
|
|
proto = ntohs(*(__be16 *)&buf[2]);
|
|
p = &buf[4];
|
|
break;
|
|
#ifdef CONFIG_ISDN_PPP
|
|
case ISDN_NET_ENCAP_SYNCPPP:
|
|
proto = ntohs(skb->protocol);
|
|
p = &buf[IPPP_MAX_HEADER];
|
|
break;
|
|
#endif
|
|
}
|
|
}
|
|
data_ofs = ((p[0] & 15) * 4);
|
|
switch (proto) {
|
|
case ETH_P_IP:
|
|
switch (p[9]) {
|
|
case 1:
|
|
strcpy(addinfo, " ICMP");
|
|
break;
|
|
case 2:
|
|
strcpy(addinfo, " IGMP");
|
|
break;
|
|
case 4:
|
|
strcpy(addinfo, " IPIP");
|
|
break;
|
|
case 6:
|
|
ipp = (ip_ports *) (&p[data_ofs]);
|
|
sprintf(addinfo, " TCP, port: %d -> %d", ntohs(ipp->source),
|
|
ntohs(ipp->dest));
|
|
break;
|
|
case 8:
|
|
strcpy(addinfo, " EGP");
|
|
break;
|
|
case 12:
|
|
strcpy(addinfo, " PUP");
|
|
break;
|
|
case 17:
|
|
ipp = (ip_ports *) (&p[data_ofs]);
|
|
sprintf(addinfo, " UDP, port: %d -> %d", ntohs(ipp->source),
|
|
ntohs(ipp->dest));
|
|
break;
|
|
case 22:
|
|
strcpy(addinfo, " IDP");
|
|
break;
|
|
}
|
|
printk(KERN_INFO "OPEN: %pI4 -> %pI4%s\n",
|
|
p + 12, p + 16, addinfo);
|
|
break;
|
|
case ETH_P_ARP:
|
|
printk(KERN_INFO "OPEN: ARP %pI4 -> *.*.*.* ?%pI4\n",
|
|
p + 14, p + 24);
|
|
break;
|
|
}
|
|
}
|
|
|
|
/*
|
|
* this function is used to send supervisory data, i.e. data which was
|
|
* not received from the network layer, but e.g. frames from ipppd, CCP
|
|
* reset frames etc.
|
|
*/
|
|
void isdn_net_write_super(isdn_net_local *lp, struct sk_buff *skb)
|
|
{
|
|
if (in_irq()) {
|
|
// we can't grab the lock from irq context,
|
|
// so we just queue the packet
|
|
skb_queue_tail(&lp->super_tx_queue, skb);
|
|
schedule_work(&lp->tqueue);
|
|
return;
|
|
}
|
|
|
|
spin_lock_bh(&lp->xmit_lock);
|
|
if (!isdn_net_lp_busy(lp)) {
|
|
isdn_net_writebuf_skb(lp, skb);
|
|
} else {
|
|
skb_queue_tail(&lp->super_tx_queue, skb);
|
|
}
|
|
spin_unlock_bh(&lp->xmit_lock);
|
|
}
|
|
|
|
/*
|
|
* called from tq_immediate
|
|
*/
|
|
static void isdn_net_softint(struct work_struct *work)
|
|
{
|
|
isdn_net_local *lp = container_of(work, isdn_net_local, tqueue);
|
|
struct sk_buff *skb;
|
|
|
|
spin_lock_bh(&lp->xmit_lock);
|
|
while (!isdn_net_lp_busy(lp)) {
|
|
skb = skb_dequeue(&lp->super_tx_queue);
|
|
if (!skb)
|
|
break;
|
|
isdn_net_writebuf_skb(lp, skb);
|
|
}
|
|
spin_unlock_bh(&lp->xmit_lock);
|
|
}
|
|
|
|
/*
|
|
* all frames sent from the (net) LL to a HL driver should go via this function
|
|
* it's serialized by the caller holding the lp->xmit_lock spinlock
|
|
*/
|
|
void isdn_net_writebuf_skb(isdn_net_local *lp, struct sk_buff *skb)
|
|
{
|
|
int ret;
|
|
int len = skb->len; /* save len */
|
|
|
|
/* before obtaining the lock the caller should have checked that
|
|
the lp isn't busy */
|
|
if (isdn_net_lp_busy(lp)) {
|
|
printk("isdn BUG at %s:%d!\n", __FILE__, __LINE__);
|
|
goto error;
|
|
}
|
|
|
|
if (!(lp->flags & ISDN_NET_CONNECTED)) {
|
|
printk("isdn BUG at %s:%d!\n", __FILE__, __LINE__);
|
|
goto error;
|
|
}
|
|
ret = isdn_writebuf_skb_stub(lp->isdn_device, lp->isdn_channel, 1, skb);
|
|
if (ret != len) {
|
|
/* we should never get here */
|
|
printk(KERN_WARNING "%s: HL driver queue full\n", lp->netdev->dev->name);
|
|
goto error;
|
|
}
|
|
|
|
lp->transcount += len;
|
|
isdn_net_inc_frame_cnt(lp);
|
|
return;
|
|
|
|
error:
|
|
dev_kfree_skb(skb);
|
|
lp->stats.tx_errors++;
|
|
|
|
}
|
|
|
|
|
|
/*
|
|
* Helper function for isdn_net_start_xmit.
|
|
* When called, the connection is already established.
|
|
* Based on cps-calculation, check if device is overloaded.
|
|
* If so, and if a slave exists, trigger dialing for it.
|
|
* If any slave is online, deliver packets using a simple round robin
|
|
* scheme.
|
|
*
|
|
* Return: 0 on success, !0 on failure.
|
|
*/
|
|
|
|
static int
|
|
isdn_net_xmit(struct net_device *ndev, struct sk_buff *skb)
|
|
{
|
|
isdn_net_dev *nd;
|
|
isdn_net_local *slp;
|
|
isdn_net_local *lp = netdev_priv(ndev);
|
|
int retv = NETDEV_TX_OK;
|
|
|
|
if (((isdn_net_local *) netdev_priv(ndev))->master) {
|
|
printk("isdn BUG at %s:%d!\n", __FILE__, __LINE__);
|
|
dev_kfree_skb(skb);
|
|
return NETDEV_TX_OK;
|
|
}
|
|
|
|
/* For the other encaps the header has already been built */
|
|
#ifdef CONFIG_ISDN_PPP
|
|
if (lp->p_encap == ISDN_NET_ENCAP_SYNCPPP) {
|
|
return isdn_ppp_xmit(skb, ndev);
|
|
}
|
|
#endif
|
|
nd = ((isdn_net_local *) netdev_priv(ndev))->netdev;
|
|
lp = isdn_net_get_locked_lp(nd);
|
|
if (!lp) {
|
|
printk(KERN_WARNING "%s: all channels busy - requeuing!\n", ndev->name);
|
|
return NETDEV_TX_BUSY;
|
|
}
|
|
/* we have our lp locked from now on */
|
|
|
|
/* Reset hangup-timeout */
|
|
lp->huptimer = 0; // FIXME?
|
|
isdn_net_writebuf_skb(lp, skb);
|
|
spin_unlock_bh(&lp->xmit_lock);
|
|
|
|
/* the following stuff is here for backwards compatibility.
|
|
* in future, start-up and hangup of slaves (based on current load)
|
|
* should move to userspace and get based on an overall cps
|
|
* calculation
|
|
*/
|
|
if (lp->cps > lp->triggercps) {
|
|
if (lp->slave) {
|
|
if (!lp->sqfull) {
|
|
/* First time overload: set timestamp only */
|
|
lp->sqfull = 1;
|
|
lp->sqfull_stamp = jiffies;
|
|
} else {
|
|
/* subsequent overload: if slavedelay exceeded, start dialing */
|
|
if (time_after(jiffies, lp->sqfull_stamp + lp->slavedelay)) {
|
|
slp = ISDN_SLAVE_PRIV(lp);
|
|
if (!(slp->flags & ISDN_NET_CONNECTED)) {
|
|
isdn_net_force_dial_lp(ISDN_SLAVE_PRIV(lp));
|
|
}
|
|
}
|
|
}
|
|
}
|
|
} else {
|
|
if (lp->sqfull && time_after(jiffies, lp->sqfull_stamp + lp->slavedelay + (10 * HZ))) {
|
|
lp->sqfull = 0;
|
|
}
|
|
/* this is a hack to allow auto-hangup for slaves on moderate loads */
|
|
nd->queue = nd->local;
|
|
}
|
|
|
|
return retv;
|
|
|
|
}
|
|
|
|
static void
|
|
isdn_net_adjust_hdr(struct sk_buff *skb, struct net_device *dev)
|
|
{
|
|
isdn_net_local *lp = netdev_priv(dev);
|
|
if (!skb)
|
|
return;
|
|
if (lp->p_encap == ISDN_NET_ENCAP_ETHER) {
|
|
const int pullsize = skb_network_offset(skb) - ETH_HLEN;
|
|
if (pullsize > 0) {
|
|
printk(KERN_DEBUG "isdn_net: Pull junk %d\n", pullsize);
|
|
skb_pull(skb, pullsize);
|
|
}
|
|
}
|
|
}
|
|
|
|
|
|
static void isdn_net_tx_timeout(struct net_device *ndev)
|
|
{
|
|
isdn_net_local *lp = netdev_priv(ndev);
|
|
|
|
printk(KERN_WARNING "isdn_tx_timeout dev %s dialstate %d\n", ndev->name, lp->dialstate);
|
|
if (!lp->dialstate) {
|
|
lp->stats.tx_errors++;
|
|
/*
|
|
* There is a certain probability that this currently
|
|
* works at all because if we always wake up the interface,
|
|
* then upper layer will try to send the next packet
|
|
* immediately. And then, the old clean_up logic in the
|
|
* driver will hopefully continue to work as it used to do.
|
|
*
|
|
* This is rather primitive right know, we better should
|
|
* clean internal queues here, in particular for multilink and
|
|
* ppp, and reset HL driver's channel, too. --HE
|
|
*
|
|
* actually, this may not matter at all, because ISDN hardware
|
|
* should not see transmitter hangs at all IMO
|
|
* changed KERN_DEBUG to KERN_WARNING to find out if this is
|
|
* ever called --KG
|
|
*/
|
|
}
|
|
ndev->trans_start = jiffies;
|
|
netif_wake_queue(ndev);
|
|
}
|
|
|
|
/*
|
|
* Try sending a packet.
|
|
* If this interface isn't connected to a ISDN-Channel, find a free channel,
|
|
* and start dialing.
|
|
*/
|
|
static netdev_tx_t
|
|
isdn_net_start_xmit(struct sk_buff *skb, struct net_device *ndev)
|
|
{
|
|
isdn_net_local *lp = netdev_priv(ndev);
|
|
#ifdef CONFIG_ISDN_X25
|
|
struct concap_proto *cprot = lp->netdev->cprot;
|
|
/* At this point hard_start_xmit() passes control to the encapsulation
|
|
protocol (if present).
|
|
For X.25 auto-dialing is completly bypassed because:
|
|
- It does not conform with the semantics of a reliable datalink
|
|
service as needed by X.25 PLP.
|
|
- I don't want that the interface starts dialing when the network layer
|
|
sends a message which requests to disconnect the lapb link (or if it
|
|
sends any other message not resulting in data transmission).
|
|
Instead, dialing will be initiated by the encapsulation protocol entity
|
|
when a dl_establish request is received from the upper layer.
|
|
*/
|
|
if (cprot && cprot->pops) {
|
|
int ret = cprot->pops->encap_and_xmit(cprot, skb);
|
|
|
|
if (ret)
|
|
netif_stop_queue(ndev);
|
|
return ret;
|
|
} else
|
|
#endif
|
|
/* auto-dialing xmit function */
|
|
{
|
|
#ifdef ISDN_DEBUG_NET_DUMP
|
|
u_char *buf;
|
|
#endif
|
|
isdn_net_adjust_hdr(skb, ndev);
|
|
#ifdef ISDN_DEBUG_NET_DUMP
|
|
buf = skb->data;
|
|
isdn_dumppkt("S:", buf, skb->len, 40);
|
|
#endif
|
|
|
|
if (!(lp->flags & ISDN_NET_CONNECTED)) {
|
|
int chi;
|
|
/* only do autodial if allowed by config */
|
|
if (!(ISDN_NET_DIALMODE(*lp) == ISDN_NET_DM_AUTO)) {
|
|
isdn_net_unreachable(ndev, skb, "dial rejected: interface not in dialmode `auto'");
|
|
dev_kfree_skb(skb);
|
|
return NETDEV_TX_OK;
|
|
}
|
|
if (lp->phone[1]) {
|
|
ulong flags;
|
|
|
|
if (lp->dialwait_timer <= 0)
|
|
if (lp->dialstarted > 0 && lp->dialtimeout > 0 && time_before(jiffies, lp->dialstarted + lp->dialtimeout + lp->dialwait))
|
|
lp->dialwait_timer = lp->dialstarted + lp->dialtimeout + lp->dialwait;
|
|
|
|
if (lp->dialwait_timer > 0) {
|
|
if (time_before(jiffies, lp->dialwait_timer)) {
|
|
isdn_net_unreachable(ndev, skb, "dial rejected: retry-time not reached");
|
|
dev_kfree_skb(skb);
|
|
return NETDEV_TX_OK;
|
|
} else
|
|
lp->dialwait_timer = 0;
|
|
}
|
|
/* Grab a free ISDN-Channel */
|
|
spin_lock_irqsave(&dev->lock, flags);
|
|
if (((chi =
|
|
isdn_get_free_channel(
|
|
ISDN_USAGE_NET,
|
|
lp->l2_proto,
|
|
lp->l3_proto,
|
|
lp->pre_device,
|
|
lp->pre_channel,
|
|
lp->msn)
|
|
) < 0) &&
|
|
((chi =
|
|
isdn_get_free_channel(
|
|
ISDN_USAGE_NET,
|
|
lp->l2_proto,
|
|
lp->l3_proto,
|
|
lp->pre_device,
|
|
lp->pre_channel^1,
|
|
lp->msn)
|
|
) < 0)) {
|
|
spin_unlock_irqrestore(&dev->lock, flags);
|
|
isdn_net_unreachable(ndev, skb,
|
|
"No channel");
|
|
dev_kfree_skb(skb);
|
|
return NETDEV_TX_OK;
|
|
}
|
|
/* Log packet, which triggered dialing */
|
|
if (dev->net_verbose)
|
|
isdn_net_log_skb(skb, lp);
|
|
lp->dialstate = 1;
|
|
/* Connect interface with channel */
|
|
isdn_net_bind_channel(lp, chi);
|
|
#ifdef CONFIG_ISDN_PPP
|
|
if (lp->p_encap == ISDN_NET_ENCAP_SYNCPPP) {
|
|
/* no 'first_skb' handling for syncPPP */
|
|
if (isdn_ppp_bind(lp) < 0) {
|
|
dev_kfree_skb(skb);
|
|
isdn_net_unbind_channel(lp);
|
|
spin_unlock_irqrestore(&dev->lock, flags);
|
|
return NETDEV_TX_OK; /* STN (skb to nirvana) ;) */
|
|
}
|
|
#ifdef CONFIG_IPPP_FILTER
|
|
if (isdn_ppp_autodial_filter(skb, lp)) {
|
|
isdn_ppp_free(lp);
|
|
isdn_net_unbind_channel(lp);
|
|
spin_unlock_irqrestore(&dev->lock, flags);
|
|
isdn_net_unreachable(ndev, skb, "dial rejected: packet filtered");
|
|
dev_kfree_skb(skb);
|
|
return NETDEV_TX_OK;
|
|
}
|
|
#endif
|
|
spin_unlock_irqrestore(&dev->lock, flags);
|
|
isdn_net_dial(); /* Initiate dialing */
|
|
netif_stop_queue(ndev);
|
|
return NETDEV_TX_BUSY; /* let upper layer requeue skb packet */
|
|
}
|
|
#endif
|
|
/* Initiate dialing */
|
|
spin_unlock_irqrestore(&dev->lock, flags);
|
|
isdn_net_dial();
|
|
isdn_net_device_stop_queue(lp);
|
|
return NETDEV_TX_BUSY;
|
|
} else {
|
|
isdn_net_unreachable(ndev, skb,
|
|
"No phone number");
|
|
dev_kfree_skb(skb);
|
|
return NETDEV_TX_OK;
|
|
}
|
|
} else {
|
|
/* Device is connected to an ISDN channel */
|
|
ndev->trans_start = jiffies;
|
|
if (!lp->dialstate) {
|
|
/* ISDN connection is established, try sending */
|
|
int ret;
|
|
ret = (isdn_net_xmit(ndev, skb));
|
|
if (ret) netif_stop_queue(ndev);
|
|
return ret;
|
|
} else
|
|
netif_stop_queue(ndev);
|
|
}
|
|
}
|
|
return NETDEV_TX_BUSY;
|
|
}
|
|
|
|
/*
|
|
* Shutdown a net-interface.
|
|
*/
|
|
static int
|
|
isdn_net_close(struct net_device *dev)
|
|
{
|
|
struct net_device *p;
|
|
#ifdef CONFIG_ISDN_X25
|
|
struct concap_proto *cprot =
|
|
((isdn_net_local *)netdev_priv(dev))->netdev->cprot;
|
|
/* printk(KERN_DEBUG "isdn_net_close %s\n" , dev-> name); */
|
|
#endif
|
|
|
|
#ifdef CONFIG_ISDN_X25
|
|
if (cprot && cprot->pops) cprot->pops->close(cprot);
|
|
#endif
|
|
netif_stop_queue(dev);
|
|
p = MASTER_TO_SLAVE(dev);
|
|
if (p) {
|
|
/* If this interface has slaves, stop them also */
|
|
while (p) {
|
|
#ifdef CONFIG_ISDN_X25
|
|
cprot = ((isdn_net_local *)netdev_priv(p))
|
|
->netdev->cprot;
|
|
if (cprot && cprot->pops)
|
|
cprot->pops->close(cprot);
|
|
#endif
|
|
isdn_net_hangup(p);
|
|
p = MASTER_TO_SLAVE(p);
|
|
}
|
|
}
|
|
isdn_net_hangup(dev);
|
|
isdn_unlock_drivers();
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* Get statistics
|
|
*/
|
|
static struct net_device_stats *
|
|
isdn_net_get_stats(struct net_device *dev)
|
|
{
|
|
isdn_net_local *lp = netdev_priv(dev);
|
|
return &lp->stats;
|
|
}
|
|
|
|
/* This is simply a copy from std. eth.c EXCEPT we pull ETH_HLEN
|
|
* instead of dev->hard_header_len off. This is done because the
|
|
* lowlevel-driver has already pulled off its stuff when we get
|
|
* here and this routine only gets called with p_encap == ETHER.
|
|
* Determine the packet's protocol ID. The rule here is that we
|
|
* assume 802.3 if the type field is short enough to be a length.
|
|
* This is normal practice and works for any 'now in use' protocol.
|
|
*/
|
|
|
|
static __be16
|
|
isdn_net_type_trans(struct sk_buff *skb, struct net_device *dev)
|
|
{
|
|
struct ethhdr *eth;
|
|
unsigned char *rawp;
|
|
|
|
skb_reset_mac_header(skb);
|
|
skb_pull(skb, ETH_HLEN);
|
|
eth = eth_hdr(skb);
|
|
|
|
if (*eth->h_dest & 1) {
|
|
if (memcmp(eth->h_dest, dev->broadcast, ETH_ALEN) == 0)
|
|
skb->pkt_type = PACKET_BROADCAST;
|
|
else
|
|
skb->pkt_type = PACKET_MULTICAST;
|
|
}
|
|
/*
|
|
* This ALLMULTI check should be redundant by 1.4
|
|
* so don't forget to remove it.
|
|
*/
|
|
|
|
else if (dev->flags & (IFF_PROMISC /*| IFF_ALLMULTI*/)) {
|
|
if (memcmp(eth->h_dest, dev->dev_addr, ETH_ALEN))
|
|
skb->pkt_type = PACKET_OTHERHOST;
|
|
}
|
|
if (ntohs(eth->h_proto) >= ETH_P_802_3_MIN)
|
|
return eth->h_proto;
|
|
|
|
rawp = skb->data;
|
|
|
|
/*
|
|
* This is a magic hack to spot IPX packets. Older Novell breaks
|
|
* the protocol design and runs IPX over 802.3 without an 802.2 LLC
|
|
* layer. We look for FFFF which isn't a used 802.2 SSAP/DSAP. This
|
|
* won't work for fault tolerant netware but does for the rest.
|
|
*/
|
|
if (*(unsigned short *) rawp == 0xFFFF)
|
|
return htons(ETH_P_802_3);
|
|
/*
|
|
* Real 802.2 LLC
|
|
*/
|
|
return htons(ETH_P_802_2);
|
|
}
|
|
|
|
|
|
/*
|
|
* CISCO HDLC keepalive specific stuff
|
|
*/
|
|
static struct sk_buff*
|
|
isdn_net_ciscohdlck_alloc_skb(isdn_net_local *lp, int len)
|
|
{
|
|
unsigned short hl = dev->drv[lp->isdn_device]->interface->hl_hdrlen;
|
|
struct sk_buff *skb;
|
|
|
|
skb = alloc_skb(hl + len, GFP_ATOMIC);
|
|
if (skb)
|
|
skb_reserve(skb, hl);
|
|
else
|
|
printk("isdn out of mem at %s:%d!\n", __FILE__, __LINE__);
|
|
return skb;
|
|
}
|
|
|
|
/* cisco hdlck device private ioctls */
|
|
static int
|
|
isdn_ciscohdlck_dev_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd)
|
|
{
|
|
isdn_net_local *lp = netdev_priv(dev);
|
|
unsigned long len = 0;
|
|
unsigned long expires = 0;
|
|
int tmp = 0;
|
|
int period = lp->cisco_keepalive_period;
|
|
s8 debserint = lp->cisco_debserint;
|
|
int rc = 0;
|
|
|
|
if (lp->p_encap != ISDN_NET_ENCAP_CISCOHDLCK)
|
|
return -EINVAL;
|
|
|
|
switch (cmd) {
|
|
/* get/set keepalive period */
|
|
case SIOCGKEEPPERIOD:
|
|
len = (unsigned long)sizeof(lp->cisco_keepalive_period);
|
|
if (copy_to_user(ifr->ifr_data,
|
|
&lp->cisco_keepalive_period, len))
|
|
rc = -EFAULT;
|
|
break;
|
|
case SIOCSKEEPPERIOD:
|
|
tmp = lp->cisco_keepalive_period;
|
|
len = (unsigned long)sizeof(lp->cisco_keepalive_period);
|
|
if (copy_from_user(&period, ifr->ifr_data, len))
|
|
rc = -EFAULT;
|
|
if ((period > 0) && (period <= 32767))
|
|
lp->cisco_keepalive_period = period;
|
|
else
|
|
rc = -EINVAL;
|
|
if (!rc && (tmp != lp->cisco_keepalive_period)) {
|
|
expires = (unsigned long)(jiffies +
|
|
lp->cisco_keepalive_period * HZ);
|
|
mod_timer(&lp->cisco_timer, expires);
|
|
printk(KERN_INFO "%s: Keepalive period set "
|
|
"to %d seconds.\n",
|
|
dev->name, lp->cisco_keepalive_period);
|
|
}
|
|
break;
|
|
|
|
/* get/set debugging */
|
|
case SIOCGDEBSERINT:
|
|
len = (unsigned long)sizeof(lp->cisco_debserint);
|
|
if (copy_to_user(ifr->ifr_data,
|
|
&lp->cisco_debserint, len))
|
|
rc = -EFAULT;
|
|
break;
|
|
case SIOCSDEBSERINT:
|
|
len = (unsigned long)sizeof(lp->cisco_debserint);
|
|
if (copy_from_user(&debserint,
|
|
ifr->ifr_data, len))
|
|
rc = -EFAULT;
|
|
if ((debserint >= 0) && (debserint <= 64))
|
|
lp->cisco_debserint = debserint;
|
|
else
|
|
rc = -EINVAL;
|
|
break;
|
|
|
|
default:
|
|
rc = -EINVAL;
|
|
break;
|
|
}
|
|
return (rc);
|
|
}
|
|
|
|
|
|
static int isdn_net_ioctl(struct net_device *dev,
|
|
struct ifreq *ifr, int cmd)
|
|
{
|
|
isdn_net_local *lp = netdev_priv(dev);
|
|
|
|
switch (lp->p_encap) {
|
|
#ifdef CONFIG_ISDN_PPP
|
|
case ISDN_NET_ENCAP_SYNCPPP:
|
|
return isdn_ppp_dev_ioctl(dev, ifr, cmd);
|
|
#endif
|
|
case ISDN_NET_ENCAP_CISCOHDLCK:
|
|
return isdn_ciscohdlck_dev_ioctl(dev, ifr, cmd);
|
|
default:
|
|
return -EINVAL;
|
|
}
|
|
}
|
|
|
|
/* called via cisco_timer.function */
|
|
static void
|
|
isdn_net_ciscohdlck_slarp_send_keepalive(unsigned long data)
|
|
{
|
|
isdn_net_local *lp = (isdn_net_local *) data;
|
|
struct sk_buff *skb;
|
|
unsigned char *p;
|
|
unsigned long last_cisco_myseq = lp->cisco_myseq;
|
|
int myseq_diff = 0;
|
|
|
|
if (!(lp->flags & ISDN_NET_CONNECTED) || lp->dialstate) {
|
|
printk("isdn BUG at %s:%d!\n", __FILE__, __LINE__);
|
|
return;
|
|
}
|
|
lp->cisco_myseq++;
|
|
|
|
myseq_diff = (lp->cisco_myseq - lp->cisco_mineseen);
|
|
if ((lp->cisco_line_state) && ((myseq_diff >= 3) || (myseq_diff <= -3))) {
|
|
/* line up -> down */
|
|
lp->cisco_line_state = 0;
|
|
printk(KERN_WARNING
|
|
"UPDOWN: Line protocol on Interface %s,"
|
|
" changed state to down\n", lp->netdev->dev->name);
|
|
/* should stop routing higher-level data across */
|
|
} else if ((!lp->cisco_line_state) &&
|
|
(myseq_diff >= 0) && (myseq_diff <= 2)) {
|
|
/* line down -> up */
|
|
lp->cisco_line_state = 1;
|
|
printk(KERN_WARNING
|
|
"UPDOWN: Line protocol on Interface %s,"
|
|
" changed state to up\n", lp->netdev->dev->name);
|
|
/* restart routing higher-level data across */
|
|
}
|
|
|
|
if (lp->cisco_debserint)
|
|
printk(KERN_DEBUG "%s: HDLC "
|
|
"myseq %lu, mineseen %lu%c, yourseen %lu, %s\n",
|
|
lp->netdev->dev->name, last_cisco_myseq, lp->cisco_mineseen,
|
|
((last_cisco_myseq == lp->cisco_mineseen) ? '*' : 040),
|
|
lp->cisco_yourseq,
|
|
((lp->cisco_line_state) ? "line up" : "line down"));
|
|
|
|
skb = isdn_net_ciscohdlck_alloc_skb(lp, 4 + 14);
|
|
if (!skb)
|
|
return;
|
|
|
|
p = skb_put(skb, 4 + 14);
|
|
|
|
/* cisco header */
|
|
*(u8 *)(p + 0) = CISCO_ADDR_UNICAST;
|
|
*(u8 *)(p + 1) = CISCO_CTRL;
|
|
*(__be16 *)(p + 2) = cpu_to_be16(CISCO_TYPE_SLARP);
|
|
|
|
/* slarp keepalive */
|
|
*(__be32 *)(p + 4) = cpu_to_be32(CISCO_SLARP_KEEPALIVE);
|
|
*(__be32 *)(p + 8) = cpu_to_be32(lp->cisco_myseq);
|
|
*(__be32 *)(p + 12) = cpu_to_be32(lp->cisco_yourseq);
|
|
*(__be16 *)(p + 16) = cpu_to_be16(0xffff); // reliability, always 0xffff
|
|
p += 18;
|
|
|
|
isdn_net_write_super(lp, skb);
|
|
|
|
lp->cisco_timer.expires = jiffies + lp->cisco_keepalive_period * HZ;
|
|
|
|
add_timer(&lp->cisco_timer);
|
|
}
|
|
|
|
static void
|
|
isdn_net_ciscohdlck_slarp_send_request(isdn_net_local *lp)
|
|
{
|
|
struct sk_buff *skb;
|
|
unsigned char *p;
|
|
|
|
skb = isdn_net_ciscohdlck_alloc_skb(lp, 4 + 14);
|
|
if (!skb)
|
|
return;
|
|
|
|
p = skb_put(skb, 4 + 14);
|
|
|
|
/* cisco header */
|
|
*(u8 *)(p + 0) = CISCO_ADDR_UNICAST;
|
|
*(u8 *)(p + 1) = CISCO_CTRL;
|
|
*(__be16 *)(p + 2) = cpu_to_be16(CISCO_TYPE_SLARP);
|
|
|
|
/* slarp request */
|
|
*(__be32 *)(p + 4) = cpu_to_be32(CISCO_SLARP_REQUEST);
|
|
*(__be32 *)(p + 8) = cpu_to_be32(0); // address
|
|
*(__be32 *)(p + 12) = cpu_to_be32(0); // netmask
|
|
*(__be16 *)(p + 16) = cpu_to_be16(0); // unused
|
|
p += 18;
|
|
|
|
isdn_net_write_super(lp, skb);
|
|
}
|
|
|
|
static void
|
|
isdn_net_ciscohdlck_connected(isdn_net_local *lp)
|
|
{
|
|
lp->cisco_myseq = 0;
|
|
lp->cisco_mineseen = 0;
|
|
lp->cisco_yourseq = 0;
|
|
lp->cisco_keepalive_period = ISDN_TIMER_KEEPINT;
|
|
lp->cisco_last_slarp_in = 0;
|
|
lp->cisco_line_state = 0;
|
|
lp->cisco_debserint = 0;
|
|
|
|
/* send slarp request because interface/seq.no.s reset */
|
|
isdn_net_ciscohdlck_slarp_send_request(lp);
|
|
|
|
init_timer(&lp->cisco_timer);
|
|
lp->cisco_timer.data = (unsigned long) lp;
|
|
lp->cisco_timer.function = isdn_net_ciscohdlck_slarp_send_keepalive;
|
|
lp->cisco_timer.expires = jiffies + lp->cisco_keepalive_period * HZ;
|
|
add_timer(&lp->cisco_timer);
|
|
}
|
|
|
|
static void
|
|
isdn_net_ciscohdlck_disconnected(isdn_net_local *lp)
|
|
{
|
|
del_timer(&lp->cisco_timer);
|
|
}
|
|
|
|
static void
|
|
isdn_net_ciscohdlck_slarp_send_reply(isdn_net_local *lp)
|
|
{
|
|
struct sk_buff *skb;
|
|
unsigned char *p;
|
|
struct in_device *in_dev = NULL;
|
|
__be32 addr = 0; /* local ipv4 address */
|
|
__be32 mask = 0; /* local netmask */
|
|
|
|
if ((in_dev = lp->netdev->dev->ip_ptr) != NULL) {
|
|
/* take primary(first) address of interface */
|
|
struct in_ifaddr *ifa = in_dev->ifa_list;
|
|
if (ifa != NULL) {
|
|
addr = ifa->ifa_local;
|
|
mask = ifa->ifa_mask;
|
|
}
|
|
}
|
|
|
|
skb = isdn_net_ciscohdlck_alloc_skb(lp, 4 + 14);
|
|
if (!skb)
|
|
return;
|
|
|
|
p = skb_put(skb, 4 + 14);
|
|
|
|
/* cisco header */
|
|
*(u8 *)(p + 0) = CISCO_ADDR_UNICAST;
|
|
*(u8 *)(p + 1) = CISCO_CTRL;
|
|
*(__be16 *)(p + 2) = cpu_to_be16(CISCO_TYPE_SLARP);
|
|
|
|
/* slarp reply, send own ip/netmask; if values are nonsense remote
|
|
* should think we are unable to provide it with an address via SLARP */
|
|
*(__be32 *)(p + 4) = cpu_to_be32(CISCO_SLARP_REPLY);
|
|
*(__be32 *)(p + 8) = addr; // address
|
|
*(__be32 *)(p + 12) = mask; // netmask
|
|
*(__be16 *)(p + 16) = cpu_to_be16(0); // unused
|
|
p += 18;
|
|
|
|
isdn_net_write_super(lp, skb);
|
|
}
|
|
|
|
static void
|
|
isdn_net_ciscohdlck_slarp_in(isdn_net_local *lp, struct sk_buff *skb)
|
|
{
|
|
unsigned char *p;
|
|
int period;
|
|
u32 code;
|
|
u32 my_seq;
|
|
u32 your_seq;
|
|
__be32 local;
|
|
__be32 *addr, *mask;
|
|
|
|
if (skb->len < 14)
|
|
return;
|
|
|
|
p = skb->data;
|
|
code = be32_to_cpup((__be32 *)p);
|
|
p += 4;
|
|
|
|
switch (code) {
|
|
case CISCO_SLARP_REQUEST:
|
|
lp->cisco_yourseq = 0;
|
|
isdn_net_ciscohdlck_slarp_send_reply(lp);
|
|
break;
|
|
case CISCO_SLARP_REPLY:
|
|
addr = (__be32 *)p;
|
|
mask = (__be32 *)(p + 4);
|
|
if (*mask != cpu_to_be32(0xfffffffc))
|
|
goto slarp_reply_out;
|
|
if ((*addr & cpu_to_be32(3)) == cpu_to_be32(0) ||
|
|
(*addr & cpu_to_be32(3)) == cpu_to_be32(3))
|
|
goto slarp_reply_out;
|
|
local = *addr ^ cpu_to_be32(3);
|
|
printk(KERN_INFO "%s: got slarp reply: remote ip: %pI4, local ip: %pI4 mask: %pI4\n",
|
|
lp->netdev->dev->name, addr, &local, mask);
|
|
break;
|
|
slarp_reply_out:
|
|
printk(KERN_INFO "%s: got invalid slarp reply (%pI4/%pI4) - ignored\n",
|
|
lp->netdev->dev->name, addr, mask);
|
|
break;
|
|
case CISCO_SLARP_KEEPALIVE:
|
|
period = (int)((jiffies - lp->cisco_last_slarp_in
|
|
+ HZ / 2 - 1) / HZ);
|
|
if (lp->cisco_debserint &&
|
|
(period != lp->cisco_keepalive_period) &&
|
|
lp->cisco_last_slarp_in) {
|
|
printk(KERN_DEBUG "%s: Keepalive period mismatch - "
|
|
"is %d but should be %d.\n",
|
|
lp->netdev->dev->name, period,
|
|
lp->cisco_keepalive_period);
|
|
}
|
|
lp->cisco_last_slarp_in = jiffies;
|
|
my_seq = be32_to_cpup((__be32 *)(p + 0));
|
|
your_seq = be32_to_cpup((__be32 *)(p + 4));
|
|
p += 10;
|
|
lp->cisco_yourseq = my_seq;
|
|
lp->cisco_mineseen = your_seq;
|
|
break;
|
|
}
|
|
}
|
|
|
|
static void
|
|
isdn_net_ciscohdlck_receive(isdn_net_local *lp, struct sk_buff *skb)
|
|
{
|
|
unsigned char *p;
|
|
u8 addr;
|
|
u8 ctrl;
|
|
u16 type;
|
|
|
|
if (skb->len < 4)
|
|
goto out_free;
|
|
|
|
p = skb->data;
|
|
addr = *(u8 *)(p + 0);
|
|
ctrl = *(u8 *)(p + 1);
|
|
type = be16_to_cpup((__be16 *)(p + 2));
|
|
p += 4;
|
|
skb_pull(skb, 4);
|
|
|
|
if (addr != CISCO_ADDR_UNICAST && addr != CISCO_ADDR_BROADCAST) {
|
|
printk(KERN_WARNING "%s: Unknown Cisco addr 0x%02x\n",
|
|
lp->netdev->dev->name, addr);
|
|
goto out_free;
|
|
}
|
|
if (ctrl != CISCO_CTRL) {
|
|
printk(KERN_WARNING "%s: Unknown Cisco ctrl 0x%02x\n",
|
|
lp->netdev->dev->name, ctrl);
|
|
goto out_free;
|
|
}
|
|
|
|
switch (type) {
|
|
case CISCO_TYPE_SLARP:
|
|
isdn_net_ciscohdlck_slarp_in(lp, skb);
|
|
goto out_free;
|
|
case CISCO_TYPE_CDP:
|
|
if (lp->cisco_debserint)
|
|
printk(KERN_DEBUG "%s: Received CDP packet. use "
|
|
"\"no cdp enable\" on cisco.\n",
|
|
lp->netdev->dev->name);
|
|
goto out_free;
|
|
default:
|
|
/* no special cisco protocol */
|
|
skb->protocol = htons(type);
|
|
netif_rx(skb);
|
|
return;
|
|
}
|
|
|
|
out_free:
|
|
kfree_skb(skb);
|
|
}
|
|
|
|
/*
|
|
* Got a packet from ISDN-Channel.
|
|
*/
|
|
static void
|
|
isdn_net_receive(struct net_device *ndev, struct sk_buff *skb)
|
|
{
|
|
isdn_net_local *lp = netdev_priv(ndev);
|
|
isdn_net_local *olp = lp; /* original 'lp' */
|
|
#ifdef CONFIG_ISDN_X25
|
|
struct concap_proto *cprot = lp->netdev->cprot;
|
|
#endif
|
|
lp->transcount += skb->len;
|
|
|
|
lp->stats.rx_packets++;
|
|
lp->stats.rx_bytes += skb->len;
|
|
if (lp->master) {
|
|
/* Bundling: If device is a slave-device, deliver to master, also
|
|
* handle master's statistics and hangup-timeout
|
|
*/
|
|
ndev = lp->master;
|
|
lp = netdev_priv(ndev);
|
|
lp->stats.rx_packets++;
|
|
lp->stats.rx_bytes += skb->len;
|
|
}
|
|
skb->dev = ndev;
|
|
skb->pkt_type = PACKET_HOST;
|
|
skb_reset_mac_header(skb);
|
|
#ifdef ISDN_DEBUG_NET_DUMP
|
|
isdn_dumppkt("R:", skb->data, skb->len, 40);
|
|
#endif
|
|
switch (lp->p_encap) {
|
|
case ISDN_NET_ENCAP_ETHER:
|
|
/* Ethernet over ISDN */
|
|
olp->huptimer = 0;
|
|
lp->huptimer = 0;
|
|
skb->protocol = isdn_net_type_trans(skb, ndev);
|
|
break;
|
|
case ISDN_NET_ENCAP_UIHDLC:
|
|
/* HDLC with UI-frame (for ispa with -h1 option) */
|
|
olp->huptimer = 0;
|
|
lp->huptimer = 0;
|
|
skb_pull(skb, 2);
|
|
/* Fall through */
|
|
case ISDN_NET_ENCAP_RAWIP:
|
|
/* RAW-IP without MAC-Header */
|
|
olp->huptimer = 0;
|
|
lp->huptimer = 0;
|
|
skb->protocol = htons(ETH_P_IP);
|
|
break;
|
|
case ISDN_NET_ENCAP_CISCOHDLCK:
|
|
isdn_net_ciscohdlck_receive(lp, skb);
|
|
return;
|
|
case ISDN_NET_ENCAP_CISCOHDLC:
|
|
/* CISCO-HDLC IP with type field and fake I-frame-header */
|
|
skb_pull(skb, 2);
|
|
/* Fall through */
|
|
case ISDN_NET_ENCAP_IPTYP:
|
|
/* IP with type field */
|
|
olp->huptimer = 0;
|
|
lp->huptimer = 0;
|
|
skb->protocol = *(__be16 *)&(skb->data[0]);
|
|
skb_pull(skb, 2);
|
|
if (*(unsigned short *) skb->data == 0xFFFF)
|
|
skb->protocol = htons(ETH_P_802_3);
|
|
break;
|
|
#ifdef CONFIG_ISDN_PPP
|
|
case ISDN_NET_ENCAP_SYNCPPP:
|
|
/* huptimer is done in isdn_ppp_push_higher */
|
|
isdn_ppp_receive(lp->netdev, olp, skb);
|
|
return;
|
|
#endif
|
|
|
|
default:
|
|
#ifdef CONFIG_ISDN_X25
|
|
/* try if there are generic sync_device receiver routines */
|
|
if (cprot) if (cprot->pops)
|
|
if (cprot->pops->data_ind) {
|
|
cprot->pops->data_ind(cprot, skb);
|
|
return;
|
|
};
|
|
#endif /* CONFIG_ISDN_X25 */
|
|
printk(KERN_WARNING "%s: unknown encapsulation, dropping\n",
|
|
lp->netdev->dev->name);
|
|
kfree_skb(skb);
|
|
return;
|
|
}
|
|
|
|
netif_rx(skb);
|
|
return;
|
|
}
|
|
|
|
/*
|
|
* A packet arrived via ISDN. Search interface-chain for a corresponding
|
|
* interface. If found, deliver packet to receiver-function and return 1,
|
|
* else return 0.
|
|
*/
|
|
int
|
|
isdn_net_rcv_skb(int idx, struct sk_buff *skb)
|
|
{
|
|
isdn_net_dev *p = dev->rx_netdev[idx];
|
|
|
|
if (p) {
|
|
isdn_net_local *lp = p->local;
|
|
if ((lp->flags & ISDN_NET_CONNECTED) &&
|
|
(!lp->dialstate)) {
|
|
isdn_net_receive(p->dev, skb);
|
|
return 1;
|
|
}
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* build an header
|
|
* depends on encaps that is being used.
|
|
*/
|
|
|
|
static int isdn_net_header(struct sk_buff *skb, struct net_device *dev,
|
|
unsigned short type,
|
|
const void *daddr, const void *saddr, unsigned plen)
|
|
{
|
|
isdn_net_local *lp = netdev_priv(dev);
|
|
unsigned char *p;
|
|
int len = 0;
|
|
|
|
switch (lp->p_encap) {
|
|
case ISDN_NET_ENCAP_ETHER:
|
|
len = eth_header(skb, dev, type, daddr, saddr, plen);
|
|
break;
|
|
#ifdef CONFIG_ISDN_PPP
|
|
case ISDN_NET_ENCAP_SYNCPPP:
|
|
/* stick on a fake header to keep fragmentation code happy. */
|
|
len = IPPP_MAX_HEADER;
|
|
skb_push(skb, len);
|
|
break;
|
|
#endif
|
|
case ISDN_NET_ENCAP_RAWIP:
|
|
printk(KERN_WARNING "isdn_net_header called with RAW_IP!\n");
|
|
len = 0;
|
|
break;
|
|
case ISDN_NET_ENCAP_IPTYP:
|
|
/* ethernet type field */
|
|
*((__be16 *)skb_push(skb, 2)) = htons(type);
|
|
len = 2;
|
|
break;
|
|
case ISDN_NET_ENCAP_UIHDLC:
|
|
/* HDLC with UI-Frames (for ispa with -h1 option) */
|
|
*((__be16 *)skb_push(skb, 2)) = htons(0x0103);
|
|
len = 2;
|
|
break;
|
|
case ISDN_NET_ENCAP_CISCOHDLC:
|
|
case ISDN_NET_ENCAP_CISCOHDLCK:
|
|
p = skb_push(skb, 4);
|
|
*(u8 *)(p + 0) = CISCO_ADDR_UNICAST;
|
|
*(u8 *)(p + 1) = CISCO_CTRL;
|
|
*(__be16 *)(p + 2) = cpu_to_be16(type);
|
|
p += 4;
|
|
len = 4;
|
|
break;
|
|
#ifdef CONFIG_ISDN_X25
|
|
default:
|
|
/* try if there are generic concap protocol routines */
|
|
if (lp->netdev->cprot) {
|
|
printk(KERN_WARNING "isdn_net_header called with concap_proto!\n");
|
|
len = 0;
|
|
break;
|
|
}
|
|
break;
|
|
#endif /* CONFIG_ISDN_X25 */
|
|
}
|
|
return len;
|
|
}
|
|
|
|
/* We don't need to send arp, because we have point-to-point connections. */
|
|
static int
|
|
isdn_net_rebuild_header(struct sk_buff *skb)
|
|
{
|
|
struct net_device *dev = skb->dev;
|
|
isdn_net_local *lp = netdev_priv(dev);
|
|
int ret = 0;
|
|
|
|
if (lp->p_encap == ISDN_NET_ENCAP_ETHER) {
|
|
struct ethhdr *eth = (struct ethhdr *) skb->data;
|
|
|
|
/*
|
|
* Only ARP/IP is currently supported
|
|
*/
|
|
|
|
if (eth->h_proto != htons(ETH_P_IP)) {
|
|
printk(KERN_WARNING
|
|
"isdn_net: %s don't know how to resolve type %d addresses?\n",
|
|
dev->name, (int) eth->h_proto);
|
|
memcpy(eth->h_source, dev->dev_addr, dev->addr_len);
|
|
return 0;
|
|
}
|
|
/*
|
|
* Try to get ARP to resolve the header.
|
|
*/
|
|
#ifdef CONFIG_INET
|
|
ret = arp_find(eth->h_dest, skb);
|
|
#endif
|
|
}
|
|
return ret;
|
|
}
|
|
|
|
static int isdn_header_cache(const struct neighbour *neigh, struct hh_cache *hh,
|
|
__be16 type)
|
|
{
|
|
const struct net_device *dev = neigh->dev;
|
|
isdn_net_local *lp = netdev_priv(dev);
|
|
|
|
if (lp->p_encap == ISDN_NET_ENCAP_ETHER)
|
|
return eth_header_cache(neigh, hh, type);
|
|
return -1;
|
|
}
|
|
|
|
static void isdn_header_cache_update(struct hh_cache *hh,
|
|
const struct net_device *dev,
|
|
const unsigned char *haddr)
|
|
{
|
|
isdn_net_local *lp = netdev_priv(dev);
|
|
if (lp->p_encap == ISDN_NET_ENCAP_ETHER)
|
|
eth_header_cache_update(hh, dev, haddr);
|
|
}
|
|
|
|
static const struct header_ops isdn_header_ops = {
|
|
.create = isdn_net_header,
|
|
.rebuild = isdn_net_rebuild_header,
|
|
.cache = isdn_header_cache,
|
|
.cache_update = isdn_header_cache_update,
|
|
};
|
|
|
|
/*
|
|
* Interface-setup. (just after registering a new interface)
|
|
*/
|
|
static int
|
|
isdn_net_init(struct net_device *ndev)
|
|
{
|
|
ushort max_hlhdr_len = 0;
|
|
int drvidx;
|
|
|
|
/*
|
|
* up till binding we ask the protocol layer to reserve as much
|
|
* as we might need for HL layer
|
|
*/
|
|
|
|
for (drvidx = 0; drvidx < ISDN_MAX_DRIVERS; drvidx++)
|
|
if (dev->drv[drvidx])
|
|
if (max_hlhdr_len < dev->drv[drvidx]->interface->hl_hdrlen)
|
|
max_hlhdr_len = dev->drv[drvidx]->interface->hl_hdrlen;
|
|
|
|
ndev->hard_header_len = ETH_HLEN + max_hlhdr_len;
|
|
return 0;
|
|
}
|
|
|
|
static void
|
|
isdn_net_swapbind(int drvidx)
|
|
{
|
|
isdn_net_dev *p;
|
|
|
|
#ifdef ISDN_DEBUG_NET_ICALL
|
|
printk(KERN_DEBUG "n_fi: swapping ch of %d\n", drvidx);
|
|
#endif
|
|
p = dev->netdev;
|
|
while (p) {
|
|
if (p->local->pre_device == drvidx)
|
|
switch (p->local->pre_channel) {
|
|
case 0:
|
|
p->local->pre_channel = 1;
|
|
break;
|
|
case 1:
|
|
p->local->pre_channel = 0;
|
|
break;
|
|
}
|
|
p = (isdn_net_dev *) p->next;
|
|
}
|
|
}
|
|
|
|
static void
|
|
isdn_net_swap_usage(int i1, int i2)
|
|
{
|
|
int u1 = dev->usage[i1] & ISDN_USAGE_EXCLUSIVE;
|
|
int u2 = dev->usage[i2] & ISDN_USAGE_EXCLUSIVE;
|
|
|
|
#ifdef ISDN_DEBUG_NET_ICALL
|
|
printk(KERN_DEBUG "n_fi: usage of %d and %d\n", i1, i2);
|
|
#endif
|
|
dev->usage[i1] &= ~ISDN_USAGE_EXCLUSIVE;
|
|
dev->usage[i1] |= u2;
|
|
dev->usage[i2] &= ~ISDN_USAGE_EXCLUSIVE;
|
|
dev->usage[i2] |= u1;
|
|
isdn_info_update();
|
|
}
|
|
|
|
/*
|
|
* An incoming call-request has arrived.
|
|
* Search the interface-chain for an appropriate interface.
|
|
* If found, connect the interface to the ISDN-channel and initiate
|
|
* D- and B-Channel-setup. If secure-flag is set, accept only
|
|
* configured phone-numbers. If callback-flag is set, initiate
|
|
* callback-dialing.
|
|
*
|
|
* Return-Value: 0 = No appropriate interface for this call.
|
|
* 1 = Call accepted
|
|
* 2 = Reject call, wait cbdelay, then call back
|
|
* 3 = Reject call
|
|
* 4 = Wait cbdelay, then call back
|
|
* 5 = No appropriate interface for this call,
|
|
* would eventually match if CID was longer.
|
|
*/
|
|
|
|
int
|
|
isdn_net_find_icall(int di, int ch, int idx, setup_parm *setup)
|
|
{
|
|
char *eaz;
|
|
int si1;
|
|
int si2;
|
|
int ematch;
|
|
int wret;
|
|
int swapped;
|
|
int sidx = 0;
|
|
u_long flags;
|
|
isdn_net_dev *p;
|
|
isdn_net_phone *n;
|
|
char nr[ISDN_MSNLEN];
|
|
char *my_eaz;
|
|
|
|
/* Search name in netdev-chain */
|
|
if (!setup->phone[0]) {
|
|
nr[0] = '0';
|
|
nr[1] = '\0';
|
|
printk(KERN_INFO "isdn_net: Incoming call without OAD, assuming '0'\n");
|
|
} else
|
|
strlcpy(nr, setup->phone, ISDN_MSNLEN);
|
|
si1 = (int) setup->si1;
|
|
si2 = (int) setup->si2;
|
|
if (!setup->eazmsn[0]) {
|
|
printk(KERN_WARNING "isdn_net: Incoming call without CPN, assuming '0'\n");
|
|
eaz = "0";
|
|
} else
|
|
eaz = setup->eazmsn;
|
|
if (dev->net_verbose > 1)
|
|
printk(KERN_INFO "isdn_net: call from %s,%d,%d -> %s\n", nr, si1, si2, eaz);
|
|
/* Accept DATA and VOICE calls at this stage
|
|
* local eaz is checked later for allowed call types
|
|
*/
|
|
if ((si1 != 7) && (si1 != 1)) {
|
|
if (dev->net_verbose > 1)
|
|
printk(KERN_INFO "isdn_net: Service-Indicator not 1 or 7, ignored\n");
|
|
return 0;
|
|
}
|
|
n = (isdn_net_phone *) 0;
|
|
p = dev->netdev;
|
|
ematch = wret = swapped = 0;
|
|
#ifdef ISDN_DEBUG_NET_ICALL
|
|
printk(KERN_DEBUG "n_fi: di=%d ch=%d idx=%d usg=%d\n", di, ch, idx,
|
|
dev->usage[idx]);
|
|
#endif
|
|
while (p) {
|
|
int matchret;
|
|
isdn_net_local *lp = p->local;
|
|
|
|
/* If last check has triggered as binding-swap, revert it */
|
|
switch (swapped) {
|
|
case 2:
|
|
isdn_net_swap_usage(idx, sidx);
|
|
/* fall through */
|
|
case 1:
|
|
isdn_net_swapbind(di);
|
|
break;
|
|
}
|
|
swapped = 0;
|
|
/* check acceptable call types for DOV */
|
|
my_eaz = isdn_map_eaz2msn(lp->msn, di);
|
|
if (si1 == 1) { /* it's a DOV call, check if we allow it */
|
|
if (*my_eaz == 'v' || *my_eaz == 'V' ||
|
|
*my_eaz == 'b' || *my_eaz == 'B')
|
|
my_eaz++; /* skip to allow a match */
|
|
else
|
|
my_eaz = NULL; /* force non match */
|
|
} else { /* it's a DATA call, check if we allow it */
|
|
if (*my_eaz == 'b' || *my_eaz == 'B')
|
|
my_eaz++; /* skip to allow a match */
|
|
}
|
|
if (my_eaz)
|
|
matchret = isdn_msncmp(eaz, my_eaz);
|
|
else
|
|
matchret = 1;
|
|
if (!matchret)
|
|
ematch = 1;
|
|
|
|
/* Remember if more numbers eventually can match */
|
|
if (matchret > wret)
|
|
wret = matchret;
|
|
#ifdef ISDN_DEBUG_NET_ICALL
|
|
printk(KERN_DEBUG "n_fi: if='%s', l.msn=%s, l.flags=%d, l.dstate=%d\n",
|
|
p->dev->name, lp->msn, lp->flags, lp->dialstate);
|
|
#endif
|
|
if ((!matchret) && /* EAZ is matching */
|
|
(((!(lp->flags & ISDN_NET_CONNECTED)) && /* but not connected */
|
|
(USG_NONE(dev->usage[idx]))) || /* and ch. unused or */
|
|
((((lp->dialstate == 4) || (lp->dialstate == 12)) && /* if dialing */
|
|
(!(lp->flags & ISDN_NET_CALLBACK))) /* but no callback */
|
|
)))
|
|
{
|
|
#ifdef ISDN_DEBUG_NET_ICALL
|
|
printk(KERN_DEBUG "n_fi: match1, pdev=%d pch=%d\n",
|
|
lp->pre_device, lp->pre_channel);
|
|
#endif
|
|
if (dev->usage[idx] & ISDN_USAGE_EXCLUSIVE) {
|
|
if ((lp->pre_channel != ch) ||
|
|
(lp->pre_device != di)) {
|
|
/* Here we got a problem:
|
|
* If using an ICN-Card, an incoming call is always signaled on
|
|
* on the first channel of the card, if both channels are
|
|
* down. However this channel may be bound exclusive. If the
|
|
* second channel is free, this call should be accepted.
|
|
* The solution is horribly but it runs, so what:
|
|
* We exchange the exclusive bindings of the two channels, the
|
|
* corresponding variables in the interface-structs.
|
|
*/
|
|
if (ch == 0) {
|
|
sidx = isdn_dc2minor(di, 1);
|
|
#ifdef ISDN_DEBUG_NET_ICALL
|
|
printk(KERN_DEBUG "n_fi: ch is 0\n");
|
|
#endif
|
|
if (USG_NONE(dev->usage[sidx])) {
|
|
/* Second Channel is free, now see if it is bound
|
|
* exclusive too. */
|
|
if (dev->usage[sidx] & ISDN_USAGE_EXCLUSIVE) {
|
|
#ifdef ISDN_DEBUG_NET_ICALL
|
|
printk(KERN_DEBUG "n_fi: 2nd channel is down and bound\n");
|
|
#endif
|
|
/* Yes, swap bindings only, if the original
|
|
* binding is bound to channel 1 of this driver */
|
|
if ((lp->pre_device == di) &&
|
|
(lp->pre_channel == 1)) {
|
|
isdn_net_swapbind(di);
|
|
swapped = 1;
|
|
} else {
|
|
/* ... else iterate next device */
|
|
p = (isdn_net_dev *) p->next;
|
|
continue;
|
|
}
|
|
} else {
|
|
#ifdef ISDN_DEBUG_NET_ICALL
|
|
printk(KERN_DEBUG "n_fi: 2nd channel is down and unbound\n");
|
|
#endif
|
|
/* No, swap always and swap excl-usage also */
|
|
isdn_net_swap_usage(idx, sidx);
|
|
isdn_net_swapbind(di);
|
|
swapped = 2;
|
|
}
|
|
/* Now check for exclusive binding again */
|
|
#ifdef ISDN_DEBUG_NET_ICALL
|
|
printk(KERN_DEBUG "n_fi: final check\n");
|
|
#endif
|
|
if ((dev->usage[idx] & ISDN_USAGE_EXCLUSIVE) &&
|
|
((lp->pre_channel != ch) ||
|
|
(lp->pre_device != di))) {
|
|
#ifdef ISDN_DEBUG_NET_ICALL
|
|
printk(KERN_DEBUG "n_fi: final check failed\n");
|
|
#endif
|
|
p = (isdn_net_dev *) p->next;
|
|
continue;
|
|
}
|
|
}
|
|
} else {
|
|
/* We are already on the second channel, so nothing to do */
|
|
#ifdef ISDN_DEBUG_NET_ICALL
|
|
printk(KERN_DEBUG "n_fi: already on 2nd channel\n");
|
|
#endif
|
|
}
|
|
}
|
|
}
|
|
#ifdef ISDN_DEBUG_NET_ICALL
|
|
printk(KERN_DEBUG "n_fi: match2\n");
|
|
#endif
|
|
n = lp->phone[0];
|
|
if (lp->flags & ISDN_NET_SECURE) {
|
|
while (n) {
|
|
if (!isdn_msncmp(nr, n->num))
|
|
break;
|
|
n = (isdn_net_phone *) n->next;
|
|
}
|
|
}
|
|
if (n || (!(lp->flags & ISDN_NET_SECURE))) {
|
|
#ifdef ISDN_DEBUG_NET_ICALL
|
|
printk(KERN_DEBUG "n_fi: match3\n");
|
|
#endif
|
|
/* matching interface found */
|
|
|
|
/*
|
|
* Is the state STOPPED?
|
|
* If so, no dialin is allowed,
|
|
* so reject actively.
|
|
* */
|
|
if (ISDN_NET_DIALMODE(*lp) == ISDN_NET_DM_OFF) {
|
|
printk(KERN_INFO "incoming call, interface %s `stopped' -> rejected\n",
|
|
p->dev->name);
|
|
return 3;
|
|
}
|
|
/*
|
|
* Is the interface up?
|
|
* If not, reject the call actively.
|
|
*/
|
|
if (!isdn_net_device_started(p)) {
|
|
printk(KERN_INFO "%s: incoming call, interface down -> rejected\n",
|
|
p->dev->name);
|
|
return 3;
|
|
}
|
|
/* Interface is up, now see if it's a slave. If so, see if
|
|
* it's master and parent slave is online. If not, reject the call.
|
|
*/
|
|
if (lp->master) {
|
|
isdn_net_local *mlp = ISDN_MASTER_PRIV(lp);
|
|
printk(KERN_DEBUG "ICALLslv: %s\n", p->dev->name);
|
|
printk(KERN_DEBUG "master=%s\n", lp->master->name);
|
|
if (mlp->flags & ISDN_NET_CONNECTED) {
|
|
printk(KERN_DEBUG "master online\n");
|
|
/* Master is online, find parent-slave (master if first slave) */
|
|
while (mlp->slave) {
|
|
if (ISDN_SLAVE_PRIV(mlp) == lp)
|
|
break;
|
|
mlp = ISDN_SLAVE_PRIV(mlp);
|
|
}
|
|
} else
|
|
printk(KERN_DEBUG "master offline\n");
|
|
/* Found parent, if it's offline iterate next device */
|
|
printk(KERN_DEBUG "mlpf: %d\n", mlp->flags & ISDN_NET_CONNECTED);
|
|
if (!(mlp->flags & ISDN_NET_CONNECTED)) {
|
|
p = (isdn_net_dev *) p->next;
|
|
continue;
|
|
}
|
|
}
|
|
if (lp->flags & ISDN_NET_CALLBACK) {
|
|
int chi;
|
|
/*
|
|
* Is the state MANUAL?
|
|
* If so, no callback can be made,
|
|
* so reject actively.
|
|
* */
|
|
if (ISDN_NET_DIALMODE(*lp) == ISDN_NET_DM_OFF) {
|
|
printk(KERN_INFO "incoming call for callback, interface %s `off' -> rejected\n",
|
|
p->dev->name);
|
|
return 3;
|
|
}
|
|
printk(KERN_DEBUG "%s: call from %s -> %s, start callback\n",
|
|
p->dev->name, nr, eaz);
|
|
if (lp->phone[1]) {
|
|
/* Grab a free ISDN-Channel */
|
|
spin_lock_irqsave(&dev->lock, flags);
|
|
if ((chi =
|
|
isdn_get_free_channel(
|
|
ISDN_USAGE_NET,
|
|
lp->l2_proto,
|
|
lp->l3_proto,
|
|
lp->pre_device,
|
|
lp->pre_channel,
|
|
lp->msn)
|
|
) < 0) {
|
|
|
|
printk(KERN_WARNING "isdn_net_find_icall: No channel for %s\n",
|
|
p->dev->name);
|
|
spin_unlock_irqrestore(&dev->lock, flags);
|
|
return 0;
|
|
}
|
|
/* Setup dialstate. */
|
|
lp->dtimer = 0;
|
|
lp->dialstate = 11;
|
|
/* Connect interface with channel */
|
|
isdn_net_bind_channel(lp, chi);
|
|
#ifdef CONFIG_ISDN_PPP
|
|
if (lp->p_encap == ISDN_NET_ENCAP_SYNCPPP)
|
|
if (isdn_ppp_bind(lp) < 0) {
|
|
spin_unlock_irqrestore(&dev->lock, flags);
|
|
isdn_net_unbind_channel(lp);
|
|
return 0;
|
|
}
|
|
#endif
|
|
spin_unlock_irqrestore(&dev->lock, flags);
|
|
/* Initiate dialing by returning 2 or 4 */
|
|
return (lp->flags & ISDN_NET_CBHUP) ? 2 : 4;
|
|
} else
|
|
printk(KERN_WARNING "isdn_net: %s: No phone number\n",
|
|
p->dev->name);
|
|
return 0;
|
|
} else {
|
|
printk(KERN_DEBUG "%s: call from %s -> %s accepted\n",
|
|
p->dev->name, nr, eaz);
|
|
/* if this interface is dialing, it does it probably on a different
|
|
device, so free this device */
|
|
if ((lp->dialstate == 4) || (lp->dialstate == 12)) {
|
|
#ifdef CONFIG_ISDN_PPP
|
|
if (lp->p_encap == ISDN_NET_ENCAP_SYNCPPP)
|
|
isdn_ppp_free(lp);
|
|
#endif
|
|
isdn_net_lp_disconnected(lp);
|
|
isdn_free_channel(lp->isdn_device, lp->isdn_channel,
|
|
ISDN_USAGE_NET);
|
|
}
|
|
spin_lock_irqsave(&dev->lock, flags);
|
|
dev->usage[idx] &= ISDN_USAGE_EXCLUSIVE;
|
|
dev->usage[idx] |= ISDN_USAGE_NET;
|
|
strcpy(dev->num[idx], nr);
|
|
isdn_info_update();
|
|
dev->st_netdev[idx] = lp->netdev;
|
|
lp->isdn_device = di;
|
|
lp->isdn_channel = ch;
|
|
lp->ppp_slot = -1;
|
|
lp->flags |= ISDN_NET_CONNECTED;
|
|
lp->dialstate = 7;
|
|
lp->dtimer = 0;
|
|
lp->outgoing = 0;
|
|
lp->huptimer = 0;
|
|
lp->hupflags |= ISDN_WAITCHARGE;
|
|
lp->hupflags &= ~ISDN_HAVECHARGE;
|
|
#ifdef CONFIG_ISDN_PPP
|
|
if (lp->p_encap == ISDN_NET_ENCAP_SYNCPPP) {
|
|
if (isdn_ppp_bind(lp) < 0) {
|
|
isdn_net_unbind_channel(lp);
|
|
spin_unlock_irqrestore(&dev->lock, flags);
|
|
return 0;
|
|
}
|
|
}
|
|
#endif
|
|
spin_unlock_irqrestore(&dev->lock, flags);
|
|
return 1;
|
|
}
|
|
}
|
|
}
|
|
p = (isdn_net_dev *) p->next;
|
|
}
|
|
/* If none of configured EAZ/MSN matched and not verbose, be silent */
|
|
if (!ematch || dev->net_verbose)
|
|
printk(KERN_INFO "isdn_net: call from %s -> %d %s ignored\n", nr, di, eaz);
|
|
return (wret == 2) ? 5 : 0;
|
|
}
|
|
|
|
/*
|
|
* Search list of net-interfaces for an interface with given name.
|
|
*/
|
|
isdn_net_dev *
|
|
isdn_net_findif(char *name)
|
|
{
|
|
isdn_net_dev *p = dev->netdev;
|
|
|
|
while (p) {
|
|
if (!strcmp(p->dev->name, name))
|
|
return p;
|
|
p = (isdn_net_dev *) p->next;
|
|
}
|
|
return (isdn_net_dev *) NULL;
|
|
}
|
|
|
|
/*
|
|
* Force a net-interface to dial out.
|
|
* This is called from the userlevel-routine below or
|
|
* from isdn_net_start_xmit().
|
|
*/
|
|
static int
|
|
isdn_net_force_dial_lp(isdn_net_local *lp)
|
|
{
|
|
if ((!(lp->flags & ISDN_NET_CONNECTED)) && !lp->dialstate) {
|
|
int chi;
|
|
if (lp->phone[1]) {
|
|
ulong flags;
|
|
|
|
/* Grab a free ISDN-Channel */
|
|
spin_lock_irqsave(&dev->lock, flags);
|
|
if ((chi = isdn_get_free_channel(
|
|
ISDN_USAGE_NET,
|
|
lp->l2_proto,
|
|
lp->l3_proto,
|
|
lp->pre_device,
|
|
lp->pre_channel,
|
|
lp->msn)) < 0) {
|
|
printk(KERN_WARNING "isdn_net_force_dial: No channel for %s\n",
|
|
lp->netdev->dev->name);
|
|
spin_unlock_irqrestore(&dev->lock, flags);
|
|
return -EAGAIN;
|
|
}
|
|
lp->dialstate = 1;
|
|
/* Connect interface with channel */
|
|
isdn_net_bind_channel(lp, chi);
|
|
#ifdef CONFIG_ISDN_PPP
|
|
if (lp->p_encap == ISDN_NET_ENCAP_SYNCPPP)
|
|
if (isdn_ppp_bind(lp) < 0) {
|
|
isdn_net_unbind_channel(lp);
|
|
spin_unlock_irqrestore(&dev->lock, flags);
|
|
return -EAGAIN;
|
|
}
|
|
#endif
|
|
/* Initiate dialing */
|
|
spin_unlock_irqrestore(&dev->lock, flags);
|
|
isdn_net_dial();
|
|
return 0;
|
|
} else
|
|
return -EINVAL;
|
|
} else
|
|
return -EBUSY;
|
|
}
|
|
|
|
/*
|
|
* This is called from certain upper protocol layers (multilink ppp
|
|
* and x25iface encapsulation module) that want to initiate dialing
|
|
* themselves.
|
|
*/
|
|
int
|
|
isdn_net_dial_req(isdn_net_local *lp)
|
|
{
|
|
/* is there a better error code? */
|
|
if (!(ISDN_NET_DIALMODE(*lp) == ISDN_NET_DM_AUTO)) return -EBUSY;
|
|
|
|
return isdn_net_force_dial_lp(lp);
|
|
}
|
|
|
|
/*
|
|
* Force a net-interface to dial out.
|
|
* This is always called from within userspace (ISDN_IOCTL_NET_DIAL).
|
|
*/
|
|
int
|
|
isdn_net_force_dial(char *name)
|
|
{
|
|
isdn_net_dev *p = isdn_net_findif(name);
|
|
|
|
if (!p)
|
|
return -ENODEV;
|
|
return (isdn_net_force_dial_lp(p->local));
|
|
}
|
|
|
|
/* The ISDN-specific entries in the device structure. */
|
|
static const struct net_device_ops isdn_netdev_ops = {
|
|
.ndo_init = isdn_net_init,
|
|
.ndo_open = isdn_net_open,
|
|
.ndo_stop = isdn_net_close,
|
|
.ndo_do_ioctl = isdn_net_ioctl,
|
|
|
|
.ndo_start_xmit = isdn_net_start_xmit,
|
|
.ndo_get_stats = isdn_net_get_stats,
|
|
.ndo_tx_timeout = isdn_net_tx_timeout,
|
|
};
|
|
|
|
/*
|
|
* Helper for alloc_netdev()
|
|
*/
|
|
static void _isdn_setup(struct net_device *dev)
|
|
{
|
|
isdn_net_local *lp = netdev_priv(dev);
|
|
|
|
ether_setup(dev);
|
|
|
|
/* Setup the generic properties */
|
|
dev->flags = IFF_NOARP | IFF_POINTOPOINT;
|
|
|
|
/* isdn prepends a header in the tx path, can't share skbs */
|
|
dev->priv_flags &= ~IFF_TX_SKB_SHARING;
|
|
dev->header_ops = NULL;
|
|
dev->netdev_ops = &isdn_netdev_ops;
|
|
|
|
/* for clients with MPPP maybe higher values better */
|
|
dev->tx_queue_len = 30;
|
|
|
|
lp->p_encap = ISDN_NET_ENCAP_RAWIP;
|
|
lp->magic = ISDN_NET_MAGIC;
|
|
lp->last = lp;
|
|
lp->next = lp;
|
|
lp->isdn_device = -1;
|
|
lp->isdn_channel = -1;
|
|
lp->pre_device = -1;
|
|
lp->pre_channel = -1;
|
|
lp->exclusive = -1;
|
|
lp->ppp_slot = -1;
|
|
lp->pppbind = -1;
|
|
skb_queue_head_init(&lp->super_tx_queue);
|
|
lp->l2_proto = ISDN_PROTO_L2_X75I;
|
|
lp->l3_proto = ISDN_PROTO_L3_TRANS;
|
|
lp->triggercps = 6000;
|
|
lp->slavedelay = 10 * HZ;
|
|
lp->hupflags = ISDN_INHUP; /* Do hangup even on incoming calls */
|
|
lp->onhtime = 10; /* Default hangup-time for saving costs */
|
|
lp->dialmax = 1;
|
|
/* Hangup before Callback, manual dial */
|
|
lp->flags = ISDN_NET_CBHUP | ISDN_NET_DM_MANUAL;
|
|
lp->cbdelay = 25; /* Wait 5 secs before Callback */
|
|
lp->dialtimeout = -1; /* Infinite Dial-Timeout */
|
|
lp->dialwait = 5 * HZ; /* Wait 5 sec. after failed dial */
|
|
lp->dialstarted = 0; /* Jiffies of last dial-start */
|
|
lp->dialwait_timer = 0; /* Jiffies of earliest next dial-start */
|
|
}
|
|
|
|
/*
|
|
* Allocate a new network-interface and initialize its data structures.
|
|
*/
|
|
char *
|
|
isdn_net_new(char *name, struct net_device *master)
|
|
{
|
|
isdn_net_dev *netdev;
|
|
|
|
/* Avoid creating an existing interface */
|
|
if (isdn_net_findif(name)) {
|
|
printk(KERN_WARNING "isdn_net: interface %s already exists\n", name);
|
|
return NULL;
|
|
}
|
|
if (name == NULL)
|
|
return NULL;
|
|
if (!(netdev = kzalloc(sizeof(isdn_net_dev), GFP_KERNEL))) {
|
|
printk(KERN_WARNING "isdn_net: Could not allocate net-device\n");
|
|
return NULL;
|
|
}
|
|
netdev->dev = alloc_netdev(sizeof(isdn_net_local), name, _isdn_setup);
|
|
if (!netdev->dev) {
|
|
printk(KERN_WARNING "isdn_net: Could not allocate network device\n");
|
|
kfree(netdev);
|
|
return NULL;
|
|
}
|
|
netdev->local = netdev_priv(netdev->dev);
|
|
|
|
if (master) {
|
|
/* Device shall be a slave */
|
|
struct net_device *p = MASTER_TO_SLAVE(master);
|
|
struct net_device *q = master;
|
|
|
|
netdev->local->master = master;
|
|
/* Put device at end of slave-chain */
|
|
while (p) {
|
|
q = p;
|
|
p = MASTER_TO_SLAVE(p);
|
|
}
|
|
MASTER_TO_SLAVE(q) = netdev->dev;
|
|
} else {
|
|
/* Device shall be a master */
|
|
/*
|
|
* Watchdog timer (currently) for master only.
|
|
*/
|
|
netdev->dev->watchdog_timeo = ISDN_NET_TX_TIMEOUT;
|
|
if (register_netdev(netdev->dev) != 0) {
|
|
printk(KERN_WARNING "isdn_net: Could not register net-device\n");
|
|
free_netdev(netdev->dev);
|
|
kfree(netdev);
|
|
return NULL;
|
|
}
|
|
}
|
|
netdev->queue = netdev->local;
|
|
spin_lock_init(&netdev->queue_lock);
|
|
|
|
netdev->local->netdev = netdev;
|
|
|
|
INIT_WORK(&netdev->local->tqueue, isdn_net_softint);
|
|
spin_lock_init(&netdev->local->xmit_lock);
|
|
|
|
/* Put into to netdev-chain */
|
|
netdev->next = (void *) dev->netdev;
|
|
dev->netdev = netdev;
|
|
return netdev->dev->name;
|
|
}
|
|
|
|
char *
|
|
isdn_net_newslave(char *parm)
|
|
{
|
|
char *p = strchr(parm, ',');
|
|
isdn_net_dev *n;
|
|
char newname[10];
|
|
|
|
if (p) {
|
|
/* Slave-Name MUST not be empty */
|
|
if (!strlen(p + 1))
|
|
return NULL;
|
|
strcpy(newname, p + 1);
|
|
*p = 0;
|
|
/* Master must already exist */
|
|
if (!(n = isdn_net_findif(parm)))
|
|
return NULL;
|
|
/* Master must be a real interface, not a slave */
|
|
if (n->local->master)
|
|
return NULL;
|
|
/* Master must not be started yet */
|
|
if (isdn_net_device_started(n))
|
|
return NULL;
|
|
return (isdn_net_new(newname, n->dev));
|
|
}
|
|
return NULL;
|
|
}
|
|
|
|
/*
|
|
* Set interface-parameters.
|
|
* Always set all parameters, so the user-level application is responsible
|
|
* for not overwriting existing setups. It has to get the current
|
|
* setup first, if only selected parameters are to be changed.
|
|
*/
|
|
int
|
|
isdn_net_setcfg(isdn_net_ioctl_cfg *cfg)
|
|
{
|
|
isdn_net_dev *p = isdn_net_findif(cfg->name);
|
|
ulong features;
|
|
int i;
|
|
int drvidx;
|
|
int chidx;
|
|
char drvid[25];
|
|
|
|
if (p) {
|
|
isdn_net_local *lp = p->local;
|
|
|
|
/* See if any registered driver supports the features we want */
|
|
features = ((1 << cfg->l2_proto) << ISDN_FEATURE_L2_SHIFT) |
|
|
((1 << cfg->l3_proto) << ISDN_FEATURE_L3_SHIFT);
|
|
for (i = 0; i < ISDN_MAX_DRIVERS; i++)
|
|
if (dev->drv[i])
|
|
if ((dev->drv[i]->interface->features & features) == features)
|
|
break;
|
|
if (i == ISDN_MAX_DRIVERS) {
|
|
printk(KERN_WARNING "isdn_net: No driver with selected features\n");
|
|
return -ENODEV;
|
|
}
|
|
if (lp->p_encap != cfg->p_encap) {
|
|
#ifdef CONFIG_ISDN_X25
|
|
struct concap_proto *cprot = p->cprot;
|
|
#endif
|
|
if (isdn_net_device_started(p)) {
|
|
printk(KERN_WARNING "%s: cannot change encap when if is up\n",
|
|
p->dev->name);
|
|
return -EBUSY;
|
|
}
|
|
#ifdef CONFIG_ISDN_X25
|
|
if (cprot && cprot->pops)
|
|
cprot->pops->proto_del(cprot);
|
|
p->cprot = NULL;
|
|
lp->dops = NULL;
|
|
/* ... , prepare for configuration of new one ... */
|
|
switch (cfg->p_encap) {
|
|
case ISDN_NET_ENCAP_X25IFACE:
|
|
lp->dops = &isdn_concap_reliable_dl_dops;
|
|
}
|
|
/* ... and allocate new one ... */
|
|
p->cprot = isdn_concap_new(cfg->p_encap);
|
|
/* p -> cprot == NULL now if p_encap is not supported
|
|
by means of the concap_proto mechanism */
|
|
/* the protocol is not configured yet; this will
|
|
happen later when isdn_net_reset() is called */
|
|
#endif
|
|
}
|
|
switch (cfg->p_encap) {
|
|
case ISDN_NET_ENCAP_SYNCPPP:
|
|
#ifndef CONFIG_ISDN_PPP
|
|
printk(KERN_WARNING "%s: SyncPPP support not configured\n",
|
|
p->dev->name);
|
|
return -EINVAL;
|
|
#else
|
|
p->dev->type = ARPHRD_PPP; /* change ARP type */
|
|
p->dev->addr_len = 0;
|
|
#endif
|
|
break;
|
|
case ISDN_NET_ENCAP_X25IFACE:
|
|
#ifndef CONFIG_ISDN_X25
|
|
printk(KERN_WARNING "%s: isdn-x25 support not configured\n",
|
|
p->dev->name);
|
|
return -EINVAL;
|
|
#else
|
|
p->dev->type = ARPHRD_X25; /* change ARP type */
|
|
p->dev->addr_len = 0;
|
|
#endif
|
|
break;
|
|
case ISDN_NET_ENCAP_CISCOHDLCK:
|
|
break;
|
|
default:
|
|
if (cfg->p_encap >= 0 &&
|
|
cfg->p_encap <= ISDN_NET_ENCAP_MAX_ENCAP)
|
|
break;
|
|
printk(KERN_WARNING
|
|
"%s: encapsulation protocol %d not supported\n",
|
|
p->dev->name, cfg->p_encap);
|
|
return -EINVAL;
|
|
}
|
|
if (strlen(cfg->drvid)) {
|
|
/* A bind has been requested ... */
|
|
char *c,
|
|
*e;
|
|
|
|
if (strnlen(cfg->drvid, sizeof(cfg->drvid)) ==
|
|
sizeof(cfg->drvid))
|
|
return -EINVAL;
|
|
drvidx = -1;
|
|
chidx = -1;
|
|
strcpy(drvid, cfg->drvid);
|
|
if ((c = strchr(drvid, ','))) {
|
|
/* The channel-number is appended to the driver-Id with a comma */
|
|
chidx = (int) simple_strtoul(c + 1, &e, 10);
|
|
if (e == c)
|
|
chidx = -1;
|
|
*c = '\0';
|
|
}
|
|
for (i = 0; i < ISDN_MAX_DRIVERS; i++)
|
|
/* Lookup driver-Id in array */
|
|
if (!(strcmp(dev->drvid[i], drvid))) {
|
|
drvidx = i;
|
|
break;
|
|
}
|
|
if ((drvidx == -1) || (chidx == -1))
|
|
/* Either driver-Id or channel-number invalid */
|
|
return -ENODEV;
|
|
} else {
|
|
/* Parameters are valid, so get them */
|
|
drvidx = lp->pre_device;
|
|
chidx = lp->pre_channel;
|
|
}
|
|
if (cfg->exclusive > 0) {
|
|
unsigned long flags;
|
|
|
|
/* If binding is exclusive, try to grab the channel */
|
|
spin_lock_irqsave(&dev->lock, flags);
|
|
if ((i = isdn_get_free_channel(ISDN_USAGE_NET,
|
|
lp->l2_proto, lp->l3_proto, drvidx,
|
|
chidx, lp->msn)) < 0) {
|
|
/* Grab failed, because desired channel is in use */
|
|
lp->exclusive = -1;
|
|
spin_unlock_irqrestore(&dev->lock, flags);
|
|
return -EBUSY;
|
|
}
|
|
/* All went ok, so update isdninfo */
|
|
dev->usage[i] = ISDN_USAGE_EXCLUSIVE;
|
|
isdn_info_update();
|
|
spin_unlock_irqrestore(&dev->lock, flags);
|
|
lp->exclusive = i;
|
|
} else {
|
|
/* Non-exclusive binding or unbind. */
|
|
lp->exclusive = -1;
|
|
if ((lp->pre_device != -1) && (cfg->exclusive == -1)) {
|
|
isdn_unexclusive_channel(lp->pre_device, lp->pre_channel);
|
|
isdn_free_channel(lp->pre_device, lp->pre_channel, ISDN_USAGE_NET);
|
|
drvidx = -1;
|
|
chidx = -1;
|
|
}
|
|
}
|
|
strlcpy(lp->msn, cfg->eaz, sizeof(lp->msn));
|
|
lp->pre_device = drvidx;
|
|
lp->pre_channel = chidx;
|
|
lp->onhtime = cfg->onhtime;
|
|
lp->charge = cfg->charge;
|
|
lp->l2_proto = cfg->l2_proto;
|
|
lp->l3_proto = cfg->l3_proto;
|
|
lp->cbdelay = cfg->cbdelay;
|
|
lp->dialmax = cfg->dialmax;
|
|
lp->triggercps = cfg->triggercps;
|
|
lp->slavedelay = cfg->slavedelay * HZ;
|
|
lp->pppbind = cfg->pppbind;
|
|
lp->dialtimeout = cfg->dialtimeout >= 0 ? cfg->dialtimeout * HZ : -1;
|
|
lp->dialwait = cfg->dialwait * HZ;
|
|
if (cfg->secure)
|
|
lp->flags |= ISDN_NET_SECURE;
|
|
else
|
|
lp->flags &= ~ISDN_NET_SECURE;
|
|
if (cfg->cbhup)
|
|
lp->flags |= ISDN_NET_CBHUP;
|
|
else
|
|
lp->flags &= ~ISDN_NET_CBHUP;
|
|
switch (cfg->callback) {
|
|
case 0:
|
|
lp->flags &= ~(ISDN_NET_CALLBACK | ISDN_NET_CBOUT);
|
|
break;
|
|
case 1:
|
|
lp->flags |= ISDN_NET_CALLBACK;
|
|
lp->flags &= ~ISDN_NET_CBOUT;
|
|
break;
|
|
case 2:
|
|
lp->flags |= ISDN_NET_CBOUT;
|
|
lp->flags &= ~ISDN_NET_CALLBACK;
|
|
break;
|
|
}
|
|
lp->flags &= ~ISDN_NET_DIALMODE_MASK; /* first all bits off */
|
|
if (cfg->dialmode && !(cfg->dialmode & ISDN_NET_DIALMODE_MASK)) {
|
|
/* old isdnctrl version, where only 0 or 1 is given */
|
|
printk(KERN_WARNING
|
|
"Old isdnctrl version detected! Please update.\n");
|
|
lp->flags |= ISDN_NET_DM_OFF; /* turn on `off' bit */
|
|
}
|
|
else {
|
|
lp->flags |= cfg->dialmode; /* turn on selected bits */
|
|
}
|
|
if (cfg->chargehup)
|
|
lp->hupflags |= ISDN_CHARGEHUP;
|
|
else
|
|
lp->hupflags &= ~ISDN_CHARGEHUP;
|
|
if (cfg->ihup)
|
|
lp->hupflags |= ISDN_INHUP;
|
|
else
|
|
lp->hupflags &= ~ISDN_INHUP;
|
|
if (cfg->chargeint > 10) {
|
|
lp->hupflags |= ISDN_CHARGEHUP | ISDN_HAVECHARGE | ISDN_MANCHARGE;
|
|
lp->chargeint = cfg->chargeint * HZ;
|
|
}
|
|
if (cfg->p_encap != lp->p_encap) {
|
|
if (cfg->p_encap == ISDN_NET_ENCAP_RAWIP) {
|
|
p->dev->header_ops = NULL;
|
|
p->dev->flags = IFF_NOARP | IFF_POINTOPOINT;
|
|
} else {
|
|
p->dev->header_ops = &isdn_header_ops;
|
|
if (cfg->p_encap == ISDN_NET_ENCAP_ETHER)
|
|
p->dev->flags = IFF_BROADCAST | IFF_MULTICAST;
|
|
else
|
|
p->dev->flags = IFF_NOARP | IFF_POINTOPOINT;
|
|
}
|
|
}
|
|
lp->p_encap = cfg->p_encap;
|
|
return 0;
|
|
}
|
|
return -ENODEV;
|
|
}
|
|
|
|
/*
|
|
* Perform get-interface-parameters.ioctl
|
|
*/
|
|
int
|
|
isdn_net_getcfg(isdn_net_ioctl_cfg *cfg)
|
|
{
|
|
isdn_net_dev *p = isdn_net_findif(cfg->name);
|
|
|
|
if (p) {
|
|
isdn_net_local *lp = p->local;
|
|
|
|
strcpy(cfg->eaz, lp->msn);
|
|
cfg->exclusive = lp->exclusive;
|
|
if (lp->pre_device >= 0) {
|
|
sprintf(cfg->drvid, "%s,%d", dev->drvid[lp->pre_device],
|
|
lp->pre_channel);
|
|
} else
|
|
cfg->drvid[0] = '\0';
|
|
cfg->onhtime = lp->onhtime;
|
|
cfg->charge = lp->charge;
|
|
cfg->l2_proto = lp->l2_proto;
|
|
cfg->l3_proto = lp->l3_proto;
|
|
cfg->p_encap = lp->p_encap;
|
|
cfg->secure = (lp->flags & ISDN_NET_SECURE) ? 1 : 0;
|
|
cfg->callback = 0;
|
|
if (lp->flags & ISDN_NET_CALLBACK)
|
|
cfg->callback = 1;
|
|
if (lp->flags & ISDN_NET_CBOUT)
|
|
cfg->callback = 2;
|
|
cfg->cbhup = (lp->flags & ISDN_NET_CBHUP) ? 1 : 0;
|
|
cfg->dialmode = lp->flags & ISDN_NET_DIALMODE_MASK;
|
|
cfg->chargehup = (lp->hupflags & 4) ? 1 : 0;
|
|
cfg->ihup = (lp->hupflags & 8) ? 1 : 0;
|
|
cfg->cbdelay = lp->cbdelay;
|
|
cfg->dialmax = lp->dialmax;
|
|
cfg->triggercps = lp->triggercps;
|
|
cfg->slavedelay = lp->slavedelay / HZ;
|
|
cfg->chargeint = (lp->hupflags & ISDN_CHARGEHUP) ?
|
|
(lp->chargeint / HZ) : 0;
|
|
cfg->pppbind = lp->pppbind;
|
|
cfg->dialtimeout = lp->dialtimeout >= 0 ? lp->dialtimeout / HZ : -1;
|
|
cfg->dialwait = lp->dialwait / HZ;
|
|
if (lp->slave) {
|
|
if (strlen(lp->slave->name) >= 10)
|
|
strcpy(cfg->slave, "too-long");
|
|
else
|
|
strcpy(cfg->slave, lp->slave->name);
|
|
} else
|
|
cfg->slave[0] = '\0';
|
|
if (lp->master) {
|
|
if (strlen(lp->master->name) >= 10)
|
|
strcpy(cfg->master, "too-long");
|
|
else
|
|
strcpy(cfg->master, lp->master->name);
|
|
} else
|
|
cfg->master[0] = '\0';
|
|
return 0;
|
|
}
|
|
return -ENODEV;
|
|
}
|
|
|
|
/*
|
|
* Add a phone-number to an interface.
|
|
*/
|
|
int
|
|
isdn_net_addphone(isdn_net_ioctl_phone *phone)
|
|
{
|
|
isdn_net_dev *p = isdn_net_findif(phone->name);
|
|
isdn_net_phone *n;
|
|
|
|
if (p) {
|
|
if (!(n = kmalloc(sizeof(isdn_net_phone), GFP_KERNEL)))
|
|
return -ENOMEM;
|
|
strlcpy(n->num, phone->phone, sizeof(n->num));
|
|
n->next = p->local->phone[phone->outgoing & 1];
|
|
p->local->phone[phone->outgoing & 1] = n;
|
|
return 0;
|
|
}
|
|
return -ENODEV;
|
|
}
|
|
|
|
/*
|
|
* Copy a string of all phone-numbers of an interface to user space.
|
|
* This might sleep and must be called with the isdn semaphore down.
|
|
*/
|
|
int
|
|
isdn_net_getphones(isdn_net_ioctl_phone *phone, char __user *phones)
|
|
{
|
|
isdn_net_dev *p = isdn_net_findif(phone->name);
|
|
int inout = phone->outgoing & 1;
|
|
int more = 0;
|
|
int count = 0;
|
|
isdn_net_phone *n;
|
|
|
|
if (!p)
|
|
return -ENODEV;
|
|
inout &= 1;
|
|
for (n = p->local->phone[inout]; n; n = n->next) {
|
|
if (more) {
|
|
put_user(' ', phones++);
|
|
count++;
|
|
}
|
|
if (copy_to_user(phones, n->num, strlen(n->num) + 1)) {
|
|
return -EFAULT;
|
|
}
|
|
phones += strlen(n->num);
|
|
count += strlen(n->num);
|
|
more = 1;
|
|
}
|
|
put_user(0, phones);
|
|
count++;
|
|
return count;
|
|
}
|
|
|
|
/*
|
|
* Copy a string containing the peer's phone number of a connected interface
|
|
* to user space.
|
|
*/
|
|
int
|
|
isdn_net_getpeer(isdn_net_ioctl_phone *phone, isdn_net_ioctl_phone __user *peer)
|
|
{
|
|
isdn_net_dev *p = isdn_net_findif(phone->name);
|
|
int ch, dv, idx;
|
|
|
|
if (!p)
|
|
return -ENODEV;
|
|
/*
|
|
* Theoretical race: while this executes, the remote number might
|
|
* become invalid (hang up) or change (new connection), resulting
|
|
* in (partially) wrong number copied to user. This race
|
|
* currently ignored.
|
|
*/
|
|
ch = p->local->isdn_channel;
|
|
dv = p->local->isdn_device;
|
|
if (ch < 0 && dv < 0)
|
|
return -ENOTCONN;
|
|
idx = isdn_dc2minor(dv, ch);
|
|
if (idx < 0)
|
|
return -ENODEV;
|
|
/* for pre-bound channels, we need this extra check */
|
|
if (strncmp(dev->num[idx], "???", 3) == 0)
|
|
return -ENOTCONN;
|
|
strncpy(phone->phone, dev->num[idx], ISDN_MSNLEN);
|
|
phone->outgoing = USG_OUTGOING(dev->usage[idx]);
|
|
if (copy_to_user(peer, phone, sizeof(*peer)))
|
|
return -EFAULT;
|
|
return 0;
|
|
}
|
|
/*
|
|
* Delete a phone-number from an interface.
|
|
*/
|
|
int
|
|
isdn_net_delphone(isdn_net_ioctl_phone *phone)
|
|
{
|
|
isdn_net_dev *p = isdn_net_findif(phone->name);
|
|
int inout = phone->outgoing & 1;
|
|
isdn_net_phone *n;
|
|
isdn_net_phone *m;
|
|
|
|
if (p) {
|
|
n = p->local->phone[inout];
|
|
m = NULL;
|
|
while (n) {
|
|
if (!strcmp(n->num, phone->phone)) {
|
|
if (p->local->dial == n)
|
|
p->local->dial = n->next;
|
|
if (m)
|
|
m->next = n->next;
|
|
else
|
|
p->local->phone[inout] = n->next;
|
|
kfree(n);
|
|
return 0;
|
|
}
|
|
m = n;
|
|
n = (isdn_net_phone *) n->next;
|
|
}
|
|
return -EINVAL;
|
|
}
|
|
return -ENODEV;
|
|
}
|
|
|
|
/*
|
|
* Delete all phone-numbers of an interface.
|
|
*/
|
|
static int
|
|
isdn_net_rmallphone(isdn_net_dev *p)
|
|
{
|
|
isdn_net_phone *n;
|
|
isdn_net_phone *m;
|
|
int i;
|
|
|
|
for (i = 0; i < 2; i++) {
|
|
n = p->local->phone[i];
|
|
while (n) {
|
|
m = n->next;
|
|
kfree(n);
|
|
n = m;
|
|
}
|
|
p->local->phone[i] = NULL;
|
|
}
|
|
p->local->dial = NULL;
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* Force a hangup of a network-interface.
|
|
*/
|
|
int
|
|
isdn_net_force_hangup(char *name)
|
|
{
|
|
isdn_net_dev *p = isdn_net_findif(name);
|
|
struct net_device *q;
|
|
|
|
if (p) {
|
|
if (p->local->isdn_device < 0)
|
|
return 1;
|
|
q = p->local->slave;
|
|
/* If this interface has slaves, do a hangup for them also. */
|
|
while (q) {
|
|
isdn_net_hangup(q);
|
|
q = MASTER_TO_SLAVE(q);
|
|
}
|
|
isdn_net_hangup(p->dev);
|
|
return 0;
|
|
}
|
|
return -ENODEV;
|
|
}
|
|
|
|
/*
|
|
* Helper-function for isdn_net_rm: Do the real work.
|
|
*/
|
|
static int
|
|
isdn_net_realrm(isdn_net_dev *p, isdn_net_dev *q)
|
|
{
|
|
u_long flags;
|
|
|
|
if (isdn_net_device_started(p)) {
|
|
return -EBUSY;
|
|
}
|
|
#ifdef CONFIG_ISDN_X25
|
|
if (p->cprot && p->cprot->pops)
|
|
p->cprot->pops->proto_del(p->cprot);
|
|
#endif
|
|
/* Free all phone-entries */
|
|
isdn_net_rmallphone(p);
|
|
/* If interface is bound exclusive, free channel-usage */
|
|
if (p->local->exclusive != -1)
|
|
isdn_unexclusive_channel(p->local->pre_device, p->local->pre_channel);
|
|
if (p->local->master) {
|
|
/* It's a slave-device, so update master's slave-pointer if necessary */
|
|
if (((isdn_net_local *) ISDN_MASTER_PRIV(p->local))->slave ==
|
|
p->dev)
|
|
((isdn_net_local *)ISDN_MASTER_PRIV(p->local))->slave =
|
|
p->local->slave;
|
|
} else {
|
|
/* Unregister only if it's a master-device */
|
|
unregister_netdev(p->dev);
|
|
}
|
|
/* Unlink device from chain */
|
|
spin_lock_irqsave(&dev->lock, flags);
|
|
if (q)
|
|
q->next = p->next;
|
|
else
|
|
dev->netdev = p->next;
|
|
if (p->local->slave) {
|
|
/* If this interface has a slave, remove it also */
|
|
char *slavename = p->local->slave->name;
|
|
isdn_net_dev *n = dev->netdev;
|
|
q = NULL;
|
|
while (n) {
|
|
if (!strcmp(n->dev->name, slavename)) {
|
|
spin_unlock_irqrestore(&dev->lock, flags);
|
|
isdn_net_realrm(n, q);
|
|
spin_lock_irqsave(&dev->lock, flags);
|
|
break;
|
|
}
|
|
q = n;
|
|
n = (isdn_net_dev *)n->next;
|
|
}
|
|
}
|
|
spin_unlock_irqrestore(&dev->lock, flags);
|
|
/* If no more net-devices remain, disable auto-hangup timer */
|
|
if (dev->netdev == NULL)
|
|
isdn_timer_ctrl(ISDN_TIMER_NETHANGUP, 0);
|
|
free_netdev(p->dev);
|
|
kfree(p);
|
|
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* Remove a single network-interface.
|
|
*/
|
|
int
|
|
isdn_net_rm(char *name)
|
|
{
|
|
u_long flags;
|
|
isdn_net_dev *p;
|
|
isdn_net_dev *q;
|
|
|
|
/* Search name in netdev-chain */
|
|
spin_lock_irqsave(&dev->lock, flags);
|
|
p = dev->netdev;
|
|
q = NULL;
|
|
while (p) {
|
|
if (!strcmp(p->dev->name, name)) {
|
|
spin_unlock_irqrestore(&dev->lock, flags);
|
|
return (isdn_net_realrm(p, q));
|
|
}
|
|
q = p;
|
|
p = (isdn_net_dev *) p->next;
|
|
}
|
|
spin_unlock_irqrestore(&dev->lock, flags);
|
|
/* If no more net-devices remain, disable auto-hangup timer */
|
|
if (dev->netdev == NULL)
|
|
isdn_timer_ctrl(ISDN_TIMER_NETHANGUP, 0);
|
|
return -ENODEV;
|
|
}
|
|
|
|
/*
|
|
* Remove all network-interfaces
|
|
*/
|
|
int
|
|
isdn_net_rmall(void)
|
|
{
|
|
u_long flags;
|
|
int ret;
|
|
|
|
/* Walk through netdev-chain */
|
|
spin_lock_irqsave(&dev->lock, flags);
|
|
while (dev->netdev) {
|
|
if (!dev->netdev->local->master) {
|
|
/* Remove master-devices only, slaves get removed with their master */
|
|
spin_unlock_irqrestore(&dev->lock, flags);
|
|
if ((ret = isdn_net_realrm(dev->netdev, NULL))) {
|
|
return ret;
|
|
}
|
|
spin_lock_irqsave(&dev->lock, flags);
|
|
}
|
|
}
|
|
dev->netdev = NULL;
|
|
spin_unlock_irqrestore(&dev->lock, flags);
|
|
return 0;
|
|
}
|