--- /dev/null
+/* $Id: isdn_net.c,v 1.1.2.2 2004/01/12 22:37:19 keil Exp $
+ *
+ * Linux ISDN subsystem, network interfaces and related functions (linklevel).
+ *
+ * Copyright 1994-1998 by Fritz Elfert (fritz@isdn4linux.de)
+ * Copyright 1995,96 by Thinking Objects Software GmbH Wuerzburg
+ * Copyright 1995,96 by Michael Hipp (Michael.Hipp@student.uni-tuebingen.de)
+ *
+ * This software may be used and distributed according to the terms
+ * of the GNU General Public License, incorporated herein by reference.
+ *
+ * Data Over Voice (DOV) support added - Guy Ellis 23-Mar-02
+ * guy@traverse.com.au
+ * Outgoing calls - looks for a 'V' in first char of dialed number
+ * Incoming calls - checks first character of eaz as follows:
+ * Numeric - accept DATA only - original functionality
+ * 'V' - accept VOICE (DOV) only
+ * 'B' - accept BOTH DATA and DOV types
+ *
+ * Jan 2001: fix CISCO HDLC Bjoern A. Zeeb <i4l@zabbadoz.net>
+ * for info on the protocol, see
+ * http://i4l.zabbadoz.net/i4l/cisco-hdlc.txt
+ */
+
+#include <linux/isdn.h>
+#include <linux/slab.h>
+#include <net/arp.h>
+#include <net/dst.h>
+#include <net/pkt_sched.h>
+#include <linux/inetdevice.h>
+#include "isdn_common.h"
+#include "isdn_net.h"
+#ifdef CONFIG_ISDN_PPP
+#include "isdn_ppp.h"
+#endif
+#ifdef CONFIG_ISDN_X25
+#include <linux/concap.h>
+#include "isdn_concap.h"
+#endif
+
+
+/*
+ * Outline of new tbusy handling:
+ *
+ * Old method, roughly spoken, consisted of setting tbusy when entering
+ * isdn_net_start_xmit() and at several other locations and clearing
+ * it from isdn_net_start_xmit() thread when sending was successful.
+ *
+ * With 2.3.x multithreaded network core, to prevent problems, tbusy should
+ * only be set by the isdn_net_start_xmit() thread and only when a tx-busy
+ * condition is detected. Other threads (in particular isdn_net_stat_callb())
+ * are only allowed to clear tbusy.
+ *
+ * -HE
+ */
+
+/*
+ * About SOFTNET:
+ * Most of the changes were pretty obvious and basically done by HE already.
+ *
+ * One problem of the isdn net device code is that is uses struct net_device
+ * for masters and slaves. However, only master interface are registered to
+ * the network layer, and therefore, it only makes sense to call netif_*
+ * functions on them.
+ *
+ * --KG
+ */
+
+/*
+ * Find out if the netdevice has been ifup-ed yet.
+ * For slaves, look at the corresponding master.
+ */
+static __inline__ int isdn_net_device_started(isdn_net_dev *n)
+{
+ isdn_net_local *lp = n->local;
+ struct net_device *dev;
+
+ if (lp->master)
+ dev = lp->master;
+ else
+ dev = n->dev;
+ return netif_running(dev);
+}
+
+/*
+ * wake up the network -> net_device queue.
+ * For slaves, wake the corresponding master interface.
+ */
+static __inline__ void isdn_net_device_wake_queue(isdn_net_local *lp)
+{
+ if (lp->master)
+ netif_wake_queue(lp->master);
+ else
+ netif_wake_queue(lp->netdev->dev);
+}
+
+/*
+ * stop the network -> net_device queue.
+ * For slaves, stop the corresponding master interface.
+ */
+static __inline__ void isdn_net_device_stop_queue(isdn_net_local *lp)
+{
+ if (lp->master)
+ netif_stop_queue(lp->master);
+ else
+ netif_stop_queue(lp->netdev->dev);
+}
+
+/*
+ * find out if the net_device which this lp belongs to (lp can be
+ * master or slave) is busy. It's busy iff all (master and slave)
+ * queues are busy
+ */
+static __inline__ int isdn_net_device_busy(isdn_net_local *lp)
+{
+ isdn_net_local *nlp;
+ isdn_net_dev *nd;
+ unsigned long flags;
+
+ if (!isdn_net_lp_busy(lp))
+ return 0;
+
+ if (lp->master)
+ nd = ISDN_MASTER_PRIV(lp)->netdev;
+ else
+ nd = lp->netdev;
+
+ spin_lock_irqsave(&nd->queue_lock, flags);
+ nlp = lp->next;
+ while (nlp != lp) {
+ if (!isdn_net_lp_busy(nlp)) {
+ spin_unlock_irqrestore(&nd->queue_lock, flags);
+ return 0;
+ }
+ nlp = nlp->next;
+ }
+ spin_unlock_irqrestore(&nd->queue_lock, flags);
+ return 1;
+}
+
+static __inline__ void isdn_net_inc_frame_cnt(isdn_net_local *lp)
+{
+ atomic_inc(&lp->frame_cnt);
+ if (isdn_net_device_busy(lp))
+ isdn_net_device_stop_queue(lp);
+}
+
+static __inline__ void isdn_net_dec_frame_cnt(isdn_net_local *lp)
+{
+ atomic_dec(&lp->frame_cnt);
+
+ if (!(isdn_net_device_busy(lp))) {
+ if (!skb_queue_empty(&lp->super_tx_queue)) {
+ schedule_work(&lp->tqueue);
+ } else {
+ isdn_net_device_wake_queue(lp);
+ }
+ }
+}
+
+static __inline__ void isdn_net_zero_frame_cnt(isdn_net_local *lp)
+{
+ atomic_set(&lp->frame_cnt, 0);
+}
+
+/* For 2.2.x we leave the transmitter busy timeout at 2 secs, just
+ * to be safe.
+ * For 2.3.x we push it up to 20 secs, because call establishment
+ * (in particular callback) may take such a long time, and we
+ * don't want confusing messages in the log. However, there is a slight
+ * possibility that this large timeout will break other things like MPPP,
+ * which might rely on the tx timeout. If so, we'll find out this way...
+ */
+
+#define ISDN_NET_TX_TIMEOUT (20 * HZ)
+
+/* Prototypes */
+
+static int isdn_net_force_dial_lp(isdn_net_local *);
+static netdev_tx_t isdn_net_start_xmit(struct sk_buff *,
+ struct net_device *);
+
+static void isdn_net_ciscohdlck_connected(isdn_net_local *lp);
+static void isdn_net_ciscohdlck_disconnected(isdn_net_local *lp);
+
+char *isdn_net_revision = "$Revision: 1.1.2.2 $";
+
+/*
+ * Code for raw-networking over ISDN
+ */
+
+static void
+isdn_net_unreachable(struct net_device *dev, struct sk_buff *skb, char *reason)
+{
+ if (skb) {
+
+ u_short proto = ntohs(skb->protocol);
+
+ printk(KERN_DEBUG "isdn_net: %s: %s, signalling dst_link_failure %s\n",
+ dev->name,
+ (reason != NULL) ? reason : "unknown",
+ (proto != ETH_P_IP) ? "Protocol != ETH_P_IP" : "");
+
+ dst_link_failure(skb);
+ }
+ else { /* dial not triggered by rawIP packet */
+ printk(KERN_DEBUG "isdn_net: %s: %s\n",
+ dev->name,
+ (reason != NULL) ? reason : "reason unknown");
+ }
+}
+
+static void
+isdn_net_reset(struct net_device *dev)
+{
+#ifdef CONFIG_ISDN_X25
+ struct concap_device_ops *dops =
+ ((isdn_net_local *)netdev_priv(dev))->dops;
+ struct concap_proto *cprot =
+ ((isdn_net_local *)netdev_priv(dev))->netdev->cprot;
+#endif
+#ifdef CONFIG_ISDN_X25
+ if (cprot && cprot->pops && dops)
+ cprot->pops->restart(cprot, dev, dops);
+#endif
+}
+
+/* Open/initialize the board. */
+static int
+isdn_net_open(struct net_device *dev)
+{
+ int i;
+ struct net_device *p;
+ struct in_device *in_dev;
+
+ /* moved here from isdn_net_reset, because only the master has an
+ interface associated which is supposed to be started. BTW:
+ we need to call netif_start_queue, not netif_wake_queue here */
+ netif_start_queue(dev);
+
+ isdn_net_reset(dev);
+ /* Fill in the MAC-level header (not needed, but for compatibility... */
+ for (i = 0; i < ETH_ALEN - sizeof(u32); i++)
+ dev->dev_addr[i] = 0xfc;
+ if ((in_dev = dev->ip_ptr) != NULL) {
+ /*
+ * Any address will do - we take the first
+ */
+ struct in_ifaddr *ifa = in_dev->ifa_list;
+ if (ifa != NULL)
+ memcpy(dev->dev_addr + 2, &ifa->ifa_local, 4);
+ }
+
+ /* If this interface has slaves, start them also */
+ p = MASTER_TO_SLAVE(dev);
+ if (p) {
+ while (p) {
+ isdn_net_reset(p);
+ p = MASTER_TO_SLAVE(p);
+ }
+ }
+ isdn_lock_drivers();
+ return 0;
+}
+
+/*
+ * Assign an ISDN-channel to a net-interface
+ */
+static void
+isdn_net_bind_channel(isdn_net_local *lp, int idx)
+{
+ lp->flags |= ISDN_NET_CONNECTED;
+ lp->isdn_device = dev->drvmap[idx];
+ lp->isdn_channel = dev->chanmap[idx];
+ dev->rx_netdev[idx] = lp->netdev;
+ dev->st_netdev[idx] = lp->netdev;
+}
+
+/*
+ * unbind a net-interface (resets interface after an error)
+ */
+static void
+isdn_net_unbind_channel(isdn_net_local *lp)
+{
+ skb_queue_purge(&lp->super_tx_queue);
+
+ if (!lp->master) { /* reset only master device */
+ /* Moral equivalent of dev_purge_queues():
+ BEWARE! This chunk of code cannot be called from hardware
+ interrupt handler. I hope it is true. --ANK
+ */
+ qdisc_reset_all_tx(lp->netdev->dev);
+ }
+ lp->dialstate = 0;
+ dev->rx_netdev[isdn_dc2minor(lp->isdn_device, lp->isdn_channel)] = NULL;
+ dev->st_netdev[isdn_dc2minor(lp->isdn_device, lp->isdn_channel)] = NULL;
+ if (lp->isdn_device != -1 && lp->isdn_channel != -1)
+ isdn_free_channel(lp->isdn_device, lp->isdn_channel,
+ ISDN_USAGE_NET);
+ lp->flags &= ~ISDN_NET_CONNECTED;
+ lp->isdn_device = -1;
+ lp->isdn_channel = -1;
+}
+
+/*
+ * Perform auto-hangup and cps-calculation for net-interfaces.
+ *
+ * auto-hangup:
+ * Increment idle-counter (this counter is reset on any incoming or
+ * outgoing packet), if counter exceeds configured limit either do a
+ * hangup immediately or - if configured - wait until just before the next
+ * charge-info.
+ *
+ * cps-calculation (needed for dynamic channel-bundling):
+ * Since this function is called every second, simply reset the
+ * byte-counter of the interface after copying it to the cps-variable.
+ */
+static unsigned long last_jiffies = -HZ;
+
+void
+isdn_net_autohup(void)
+{
+ isdn_net_dev *p = dev->netdev;
+ int anymore;
+
+ anymore = 0;
+ while (p) {
+ isdn_net_local *l = p->local;
+ if (jiffies == last_jiffies)
+ l->cps = l->transcount;
+ else
+ l->cps = (l->transcount * HZ) / (jiffies - last_jiffies);
+ l->transcount = 0;
+ if (dev->net_verbose > 3)
+ printk(KERN_DEBUG "%s: %d bogocps\n", p->dev->name, l->cps);
+ if ((l->flags & ISDN_NET_CONNECTED) && (!l->dialstate)) {
+ anymore = 1;
+ l->huptimer++;
+ /*
+ * if there is some dialmode where timeout-hangup
+ * should _not_ be done, check for that here
+ */
+ if ((l->onhtime) &&
+ (l->huptimer > l->onhtime))
+ {
+ if (l->hupflags & ISDN_MANCHARGE &&
+ l->hupflags & ISDN_CHARGEHUP) {
+ while (time_after(jiffies, l->chargetime + l->chargeint))
+ l->chargetime += l->chargeint;
+ if (time_after(jiffies, l->chargetime + l->chargeint - 2 * HZ))
+ if (l->outgoing || l->hupflags & ISDN_INHUP)
+ isdn_net_hangup(p->dev);
+ } else if (l->outgoing) {
+ if (l->hupflags & ISDN_CHARGEHUP) {
+ if (l->hupflags & ISDN_WAITCHARGE) {
+ printk(KERN_DEBUG "isdn_net: Hupflags of %s are %X\n",
+ p->dev->name, l->hupflags);
+ isdn_net_hangup(p->dev);
+ } else if (time_after(jiffies, l->chargetime + l->chargeint)) {
+ printk(KERN_DEBUG
+ "isdn_net: %s: chtime = %lu, chint = %d\n",
+ p->dev->name, l->chargetime, l->chargeint);
+ isdn_net_hangup(p->dev);
+ }
+ } else
+ isdn_net_hangup(p->dev);
+ } else if (l->hupflags & ISDN_INHUP)
+ isdn_net_hangup(p->dev);
+ }
+
+ if (dev->global_flags & ISDN_GLOBAL_STOPPED || (ISDN_NET_DIALMODE(*l) == ISDN_NET_DM_OFF)) {
+ isdn_net_hangup(p->dev);
+ break;
+ }
+ }
+ p = (isdn_net_dev *) p->next;
+ }
+ last_jiffies = jiffies;
+ isdn_timer_ctrl(ISDN_TIMER_NETHANGUP, anymore);
+}
+
+static void isdn_net_lp_disconnected(isdn_net_local *lp)
+{
+ isdn_net_rm_from_bundle(lp);
+}
+
+/*
+ * Handle status-messages from ISDN-interfacecard.
+ * This function is called from within the main-status-dispatcher
+ * isdn_status_callback, which itself is called from the low-level driver.
+ * Return: 1 = Event handled, 0 = not for us or unknown Event.
+ */
+int
+isdn_net_stat_callback(int idx, isdn_ctrl *c)
+{
+ isdn_net_dev *p = dev->st_netdev[idx];
+ int cmd = c->command;
+
+ if (p) {
+ isdn_net_local *lp = p->local;
+#ifdef CONFIG_ISDN_X25
+ struct concap_proto *cprot = lp->netdev->cprot;
+ struct concap_proto_ops *pops = cprot ? cprot->pops : NULL;
+#endif
+ switch (cmd) {
+ case ISDN_STAT_BSENT:
+ /* A packet has successfully been sent out */
+ if ((lp->flags & ISDN_NET_CONNECTED) &&
+ (!lp->dialstate)) {
+ isdn_net_dec_frame_cnt(lp);
+ lp->stats.tx_packets++;
+ lp->stats.tx_bytes += c->parm.length;
+ }
+ return 1;
+ case ISDN_STAT_DCONN:
+ /* D-Channel is up */
+ switch (lp->dialstate) {
+ case 4:
+ case 7:
+ case 8:
+ lp->dialstate++;
+ return 1;
+ case 12:
+ lp->dialstate = 5;
+ return 1;
+ }
+ break;
+ case ISDN_STAT_DHUP:
+ /* Either D-Channel-hangup or error during dialout */
+#ifdef CONFIG_ISDN_X25
+ /* If we are not connencted then dialing had
+ failed. If there are generic encap protocol
+ receiver routines signal the closure of
+ the link*/
+
+ if (!(lp->flags & ISDN_NET_CONNECTED)
+ && pops && pops->disconn_ind)
+ pops->disconn_ind(cprot);
+#endif /* CONFIG_ISDN_X25 */
+ if ((!lp->dialstate) && (lp->flags & ISDN_NET_CONNECTED)) {
+ if (lp->p_encap == ISDN_NET_ENCAP_CISCOHDLCK)
+ isdn_net_ciscohdlck_disconnected(lp);
+#ifdef CONFIG_ISDN_PPP
+ if (lp->p_encap == ISDN_NET_ENCAP_SYNCPPP)
+ isdn_ppp_free(lp);
+#endif
+ isdn_net_lp_disconnected(lp);
+ isdn_all_eaz(lp->isdn_device, lp->isdn_channel);
+ printk(KERN_INFO "%s: remote hangup\n", p->dev->name);
+ printk(KERN_INFO "%s: Chargesum is %d\n", p->dev->name,
+ lp->charge);
+ isdn_net_unbind_channel(lp);
+ return 1;
+ }
+ break;
+#ifdef CONFIG_ISDN_X25
+ case ISDN_STAT_BHUP:
+ /* B-Channel-hangup */
+ /* 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);
+ return 1;
+ }
+ break;
+#endif /* CONFIG_ISDN_X25 */
+ case ISDN_STAT_BCONN:
+ /* B-Channel is up */
+ isdn_net_zero_frame_cnt(lp);
+ switch (lp->dialstate) {
+ case 5:
+ case 6:
+ case 7:
+ case 8:
+ case 9:
+ case 10:
+ case 12:
+ if (lp->dialstate <= 6) {
+ dev->usage[idx] |= ISDN_USAGE_OUTGOING;
+ isdn_info_update();
+ } else
+ dev->rx_netdev[idx] = p;
+ lp->dialstate = 0;
+ isdn_timer_ctrl(ISDN_TIMER_NETHANGUP, 1);
+ 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 (ether_addr_equal(eth->h_dest, dev->broadcast))
+ 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 (!ether_addr_equal(eth->h_dest, dev->dev_addr))
+ 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;
+}
+
+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,
+ .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,
+ NET_NAME_UNKNOWN, _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 & ISDN_CHARGEHUP) ? 1 : 0;
+ cfg->ihup = (lp->hupflags & ISDN_INHUP) ? 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;
+}
Code Review / kvmfornfv.git / blobdiff