diff options
Diffstat (limited to 'drivers/isdn/i4l/isdn_net.c')
| -rw-r--r-- | drivers/isdn/i4l/isdn_net.c | 3198 |
1 files changed, 0 insertions, 3198 deletions
diff --git a/drivers/isdn/i4l/isdn_net.c b/drivers/isdn/i4l/isdn_net.c deleted file mode 100644 index c138f66f2659..000000000000 --- a/drivers/isdn/i4l/isdn_net.c +++ /dev/null @@ -1,3198 +0,0 @@ -/* $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 it 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 - */ - } - netif_trans_update(ndev); - 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 */ - netif_trans_update(ndev); - 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(struct timer_list *t) -{ - isdn_net_local *lp = from_timer(lp, t, cisco_timer); - 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); - - timer_setup(&lp->cisco_timer, - isdn_net_ciscohdlck_slarp_send_keepalive, 0); - 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 or overflow 'newname' */ - if (strscpy(newname, p + 1, sizeof(newname)) <= 0) - return NULL; - *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; -} |