| /* $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 <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_net_local *) lp->master->priv)->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 int 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 *) dev->priv ) -> dops; |
| struct concap_proto * cprot = |
| ( (isdn_net_local *) dev->priv ) -> 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 */ |
| |
| if ((p = (((isdn_net_local *) dev->priv)->slave))) { |
| while (p) { |
| isdn_net_reset(p); |
| p = (((isdn_net_local *) p->priv)->slave); |
| } |
| } |
| 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; |
| 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_net_local *)lp->master->priv)->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 = (isdn_net_local *) d->priv; |
| 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_net_local *)lp->slave->priv; |
| 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 { |
| unsigned short source; |
| unsigned short 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->tail) { |
| /* 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 = (isdn_net_local *) ndev->priv; |
| int retv = 0; |
| |
| if (((isdn_net_local *) (ndev->priv))->master) { |
| printk("isdn BUG at %s:%d!\n", __FILE__, __LINE__); |
| dev_kfree_skb(skb); |
| return 0; |
| } |
| |
| /* 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 *) ndev->priv)->netdev; |
| lp = isdn_net_get_locked_lp(nd); |
| if (!lp) { |
| printk(KERN_WARNING "%s: all channels busy - requeuing!\n", ndev->name); |
| return 1; |
| } |
| /* 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 = lp->slave->priv; |
| if (!(slp->flags & ISDN_NET_CONNECTED)) { |
| isdn_net_force_dial_lp((isdn_net_local *) lp->slave->priv); |
| } |
| } |
| } |
| } |
| } 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 = (isdn_net_local *) dev->priv; |
| 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 = (isdn_net_local *) ndev->priv; |
| |
| 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 int |
| isdn_net_start_xmit(struct sk_buff *skb, struct net_device *ndev) |
| { |
| isdn_net_local *lp = (isdn_net_local *) ndev->priv; |
| #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 0; |
| } |
| 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 0; |
| } 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 0; |
| } |
| /* 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 0; /* 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 0; |
| } |
| #endif |
| spin_unlock_irqrestore(&dev->lock, flags); |
| isdn_net_dial(); /* Initiate dialing */ |
| netif_stop_queue(ndev); |
| return 1; /* 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 1; |
| } else { |
| isdn_net_unreachable(ndev, skb, |
| "No phone number"); |
| dev_kfree_skb(skb); |
| return 0; |
| } |
| } 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 1; |
| } |
| |
| /* |
| * 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 *) dev->priv ) -> 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); |
| if ((p = (((isdn_net_local *) dev->priv)->slave))) { |
| /* If this interface has slaves, stop them also */ |
| while (p) { |
| #ifdef CONFIG_ISDN_X25 |
| cprot = ( (isdn_net_local *) p->priv ) |
| -> netdev -> cprot; |
| if( cprot && cprot -> pops ) |
| cprot -> pops -> close( cprot ); |
| #endif |
| isdn_net_hangup(p); |
| p = (((isdn_net_local *) p->priv)->slave); |
| } |
| } |
| 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 = (isdn_net_local *) dev->priv; |
| 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 unsigned short |
| isdn_net_type_trans(struct sk_buff *skb, struct net_device *dev) |
| { |
| struct ethhdr *eth; |
| unsigned char *rawp; |
| |
| skb_reset_mac_header(skb); |
| skb_pull(skb, ETH_HLEN); |
| eth = eth_hdr(skb); |
| |
| if (*eth->h_dest & 1) { |
| if (memcmp(eth->h_dest, dev->broadcast, ETH_ALEN) == 0) |
| skb->pkt_type = PACKET_BROADCAST; |
| else |
| skb->pkt_type = PACKET_MULTICAST; |
| } |
| /* |
| * This ALLMULTI check should be redundant by 1.4 |
| * so don't forget to remove it. |
| */ |
| |
| else if (dev->flags & (IFF_PROMISC /*| IFF_ALLMULTI*/)) { |
| if (memcmp(eth->h_dest, dev->dev_addr, ETH_ALEN)) |
| skb->pkt_type = PACKET_OTHERHOST; |
| } |
| if (ntohs(eth->h_proto) >= 1536) |
| 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 = (isdn_net_local *) dev->priv; |
| 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); |
| } |
| |
| /* 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 accross */ |
| } 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 accross */ |
| } |
| |
| 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); // reliablity, 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) = cpu_to_be32(addr); // address |
| *(__be32 *)(p + 12) = cpu_to_be32(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; |
| u16 unused; |
| |
| 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)); |
| unused = be16_to_cpup((__be16 *)(p + 8)); |
| 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 = (isdn_net_local *) ndev->priv; |
| 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 = (isdn_net_local *) ndev->priv; |
| 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 = *(unsigned short *) &(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 = dev->priv; |
| unsigned char *p; |
| ushort 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 */ |
| *((ushort *) skb_push(skb, 2)) = htons(type); |
| len = 2; |
| break; |
| case ISDN_NET_ENCAP_UIHDLC: |
| /* HDLC with UI-Frames (for ispa with -h1 option) */ |
| *((ushort *) skb_push(skb, 2)) = htons(0x0103); |
| len = 2; |
| break; |
| case ISDN_NET_ENCAP_CISCOHDLC: |
| case ISDN_NET_ENCAP_CISCOHDLCK: |
| p = skb_push(skb, 4); |
| *(u8 *)(p + 0) = CISCO_ADDR_UNICAST; |
| *(u8 *)(p + 1) = CISCO_CTRL; |
| *(__be16 *)(p + 2) = cpu_to_be16(type); |
| p += 4; |
| len = 4; |
| break; |
| #ifdef CONFIG_ISDN_X25 |
| default: |
| /* try if there are generic concap protocol routines */ |
| if( lp-> netdev -> cprot ){ |
| printk(KERN_WARNING "isdn_net_header called with concap_proto!\n"); |
| len = 0; |
| break; |
| } |
| break; |
| #endif /* CONFIG_ISDN_X25 */ |
| } |
| return len; |
| } |
| |
| /* We don't need to send arp, because we have point-to-point connections. */ |
| static int |
| isdn_net_rebuild_header(struct sk_buff *skb) |
| { |
| struct net_device *dev = skb->dev; |
| isdn_net_local *lp = dev->priv; |
| int ret = 0; |
| |
| if (lp->p_encap == ISDN_NET_ENCAP_ETHER) { |
| struct ethhdr *eth = (struct ethhdr *) skb->data; |
| |
| /* |
| * Only ARP/IP is currently supported |
| */ |
| |
| if (eth->h_proto != htons(ETH_P_IP)) { |
| printk(KERN_WARNING |
| "isdn_net: %s don't know how to resolve type %d addresses?\n", |
| dev->name, (int) eth->h_proto); |
| memcpy(eth->h_source, dev->dev_addr, dev->addr_len); |
| return 0; |
| } |
| /* |
| * Try to get ARP to resolve the header. |
| */ |
| #ifdef CONFIG_INET |
| ret = arp_find(eth->h_dest, skb); |
| #endif |
| } |
| return ret; |
| } |
| |
| static int isdn_header_cache(const struct neighbour *neigh, struct hh_cache *hh) |
| { |
| const struct net_device *dev = neigh->dev; |
| isdn_net_local *lp = dev->priv; |
| |
| if (lp->p_encap == ISDN_NET_ENCAP_ETHER) |
| return eth_header_cache(neigh, hh); |
| 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 = dev->priv; |
| if (lp->p_encap == ISDN_NET_ENCAP_ETHER) |
| return eth_header_cache_update(hh, dev, haddr); |
| } |
| |
| static const struct header_ops isdn_header_ops = { |
| .create = isdn_net_header, |
| .rebuild = isdn_net_rebuild_header, |
| .cache = isdn_header_cache, |
| .cache_update = isdn_header_cache_update, |
| }; |
| |
| /* |
| * Interface-setup. (just after registering a new interface) |
| */ |
| static int |
| isdn_net_init(struct net_device *ndev) |
| { |
| ushort max_hlhdr_len = 0; |
| int drvidx; |
| |
| ether_setup(ndev); |
| ndev->header_ops = NULL; |
| |
| /* Setup the generic properties */ |
| ndev->mtu = 1500; |
| ndev->flags = IFF_NOARP|IFF_POINTOPOINT; |
| ndev->type = ARPHRD_ETHER; |
| ndev->addr_len = ETH_ALEN; |
| ndev->validate_addr = NULL; |
| |
| /* for clients with MPPP maybe higher values better */ |
| ndev->tx_queue_len = 30; |
| |
| /* The ISDN-specific entries in the device structure. */ |
| ndev->open = &isdn_net_open; |
| ndev->hard_start_xmit = &isdn_net_start_xmit; |
| |
| /* |
| * 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; |
| ndev->stop = &isdn_net_close; |
| ndev->get_stats = &isdn_net_get_stats; |
| ndev->do_ioctl = NULL; |
| 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_net_local *) lp->master->priv; |
| 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_net_local *) mlp->slave->priv == lp) |
| break; |
| mlp = (isdn_net_local *) mlp->slave->priv; |
| } |
| } 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)); |
| } |
| |
| /* |
| * Helper for alloc_netdev() |
| */ |
| static void _isdn_setup(struct net_device *dev) |
| { |
| isdn_net_local *lp = dev->priv; |
| |
| dev->flags = IFF_NOARP | IFF_POINTOPOINT; |
| lp->p_encap = ISDN_NET_ENCAP_RAWIP; |
| lp->magic = ISDN_NET_MAGIC; |
| lp->last = lp; |
| lp->next = lp; |
| lp->isdn_device = -1; |
| lp->isdn_channel = -1; |
| lp->pre_device = -1; |
| lp->pre_channel = -1; |
| lp->exclusive = -1; |
| lp->ppp_slot = -1; |
| lp->pppbind = -1; |
| skb_queue_head_init(&lp->super_tx_queue); |
| lp->l2_proto = ISDN_PROTO_L2_X75I; |
| lp->l3_proto = ISDN_PROTO_L3_TRANS; |
| lp->triggercps = 6000; |
| lp->slavedelay = 10 * HZ; |
| lp->hupflags = ISDN_INHUP; /* Do hangup even on incoming calls */ |
| lp->onhtime = 10; /* Default hangup-time for saving costs */ |
| lp->dialmax = 1; |
| /* Hangup before Callback, manual dial */ |
| lp->flags = ISDN_NET_CBHUP | ISDN_NET_DM_MANUAL; |
| lp->cbdelay = 25; /* Wait 5 secs before Callback */ |
| lp->dialtimeout = -1; /* Infinite Dial-Timeout */ |
| lp->dialwait = 5 * HZ; /* Wait 5 sec. after failed dial */ |
| lp->dialstarted = 0; /* Jiffies of last dial-start */ |
| lp->dialwait_timer = 0; /* Jiffies of earliest next dial-start */ |
| } |
| |
| /* |
| * Allocate a new network-interface and initialize its data structures. |
| */ |
| char * |
| isdn_net_new(char *name, struct net_device *master) |
| { |
| isdn_net_dev *netdev; |
| |
| /* Avoid creating an existing interface */ |
| if (isdn_net_findif(name)) { |
| printk(KERN_WARNING "isdn_net: interface %s already exists\n", name); |
| return NULL; |
| } |
| if (name == NULL) |
| return NULL; |
| if (!(netdev = kzalloc(sizeof(isdn_net_dev), GFP_KERNEL))) { |
| printk(KERN_WARNING "isdn_net: Could not allocate net-device\n"); |
| return NULL; |
| } |
| netdev->dev = alloc_netdev(sizeof(isdn_net_local), name, _isdn_setup); |
| if (!netdev->dev) { |
| printk(KERN_WARNING "isdn_net: Could not allocate network device\n"); |
| kfree(netdev); |
| return NULL; |
| } |
| netdev->local = netdev->dev->priv; |
| netdev->dev->init = isdn_net_init; |
| if (master) { |
| /* Device shall be a slave */ |
| struct net_device *p = (((isdn_net_local *) master->priv)->slave); |
| struct net_device *q = master; |
| |
| netdev->local->master = master; |
| /* Put device at end of slave-chain */ |
| while (p) { |
| q = p; |
| p = (((isdn_net_local *) p->priv)->slave); |
| } |
| ((isdn_net_local *) q->priv)->slave = netdev->dev; |
| } else { |
| /* Device shall be a master */ |
| /* |
| * Watchdog timer (currently) for master only. |
| */ |
| netdev->dev->tx_timeout = isdn_net_tx_timeout; |
| 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; |
| p->dev->do_ioctl = isdn_ppp_dev_ioctl; |
| #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: |
| p->dev->do_ioctl = isdn_ciscohdlck_dev_ioctl; |
| 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; |
| |
| drvidx = -1; |
| chidx = -1; |
| strcpy(drvid, cfg->drvid); |
| if ((c = strchr(drvid, ','))) { |
| /* The channel-number is appended to the driver-Id with a comma */ |
| chidx = (int) simple_strtoul(c + 1, &e, 10); |
| if (e == c) |
| chidx = -1; |
| *c = '\0'; |
| } |
| for (i = 0; i < ISDN_MAX_DRIVERS; i++) |
| /* Lookup driver-Id in array */ |
| if (!(strcmp(dev->drvid[i], drvid))) { |
| drvidx = i; |
| break; |
| } |
| if ((drvidx == -1) || (chidx == -1)) |
| /* Either driver-Id or channel-number invalid */ |
| return -ENODEV; |
| } else { |
| /* Parameters are valid, so get them */ |
| drvidx = lp->pre_device; |
| chidx = lp->pre_channel; |
| } |
| if (cfg->exclusive > 0) { |
| unsigned long flags; |
| |
| /* If binding is exclusive, try to grab the channel */ |
| spin_lock_irqsave(&dev->lock, flags); |
| if ((i = isdn_get_free_channel(ISDN_USAGE_NET, |
| lp->l2_proto, lp->l3_proto, drvidx, |
| chidx, lp->msn)) < 0) { |
| /* Grab failed, because desired channel is in use */ |
| lp->exclusive = -1; |
| spin_unlock_irqrestore(&dev->lock, flags); |
| return -EBUSY; |
| } |
| /* All went ok, so update isdninfo */ |
| dev->usage[i] = ISDN_USAGE_EXCLUSIVE; |
| isdn_info_update(); |
| spin_unlock_irqrestore(&dev->lock, flags); |
| lp->exclusive = i; |
| } else { |
| /* Non-exclusive binding or unbind. */ |
| lp->exclusive = -1; |
| if ((lp->pre_device != -1) && (cfg->exclusive == -1)) { |
| isdn_unexclusive_channel(lp->pre_device, lp->pre_channel); |
| isdn_free_channel(lp->pre_device, lp->pre_channel, ISDN_USAGE_NET); |
| drvidx = -1; |
| chidx = -1; |
| } |
| } |
| strlcpy(lp->msn, cfg->eaz, sizeof(lp->msn)); |
| lp->pre_device = drvidx; |
| lp->pre_channel = chidx; |
| lp->onhtime = cfg->onhtime; |
| lp->charge = cfg->charge; |
| lp->l2_proto = cfg->l2_proto; |
| lp->l3_proto = cfg->l3_proto; |
| lp->cbdelay = cfg->cbdelay; |
| lp->dialmax = cfg->dialmax; |
| lp->triggercps = cfg->triggercps; |
| lp->slavedelay = cfg->slavedelay * HZ; |
| lp->pppbind = cfg->pppbind; |
| lp->dialtimeout = cfg->dialtimeout >= 0 ? cfg->dialtimeout * HZ : -1; |
| lp->dialwait = cfg->dialwait * HZ; |
| if (cfg->secure) |
| lp->flags |= ISDN_NET_SECURE; |
| else |
| lp->flags &= ~ISDN_NET_SECURE; |
| if (cfg->cbhup) |
| lp->flags |= ISDN_NET_CBHUP; |
| else |
| lp->flags &= ~ISDN_NET_CBHUP; |
| switch (cfg->callback) { |
| case 0: |
| lp->flags &= ~(ISDN_NET_CALLBACK | ISDN_NET_CBOUT); |
| break; |
| case 1: |
| lp->flags |= ISDN_NET_CALLBACK; |
| lp->flags &= ~ISDN_NET_CBOUT; |
| break; |
| case 2: |
| lp->flags |= ISDN_NET_CBOUT; |
| lp->flags &= ~ISDN_NET_CALLBACK; |
| break; |
| } |
| lp->flags &= ~ISDN_NET_DIALMODE_MASK; /* first all bits off */ |
| if (cfg->dialmode && !(cfg->dialmode & ISDN_NET_DIALMODE_MASK)) { |
| /* old isdnctrl version, where only 0 or 1 is given */ |
| printk(KERN_WARNING |
| "Old isdnctrl version detected! Please update.\n"); |
| lp->flags |= ISDN_NET_DM_OFF; /* turn on `off' bit */ |
| } |
| else { |
| lp->flags |= cfg->dialmode; /* turn on selected bits */ |
| } |
| if (cfg->chargehup) |
| lp->hupflags |= ISDN_CHARGEHUP; |
| else |
| lp->hupflags &= ~ISDN_CHARGEHUP; |
| if (cfg->ihup) |
| lp->hupflags |= ISDN_INHUP; |
| else |
| lp->hupflags &= ~ISDN_INHUP; |
| if (cfg->chargeint > 10) { |
| lp->hupflags |= ISDN_CHARGEHUP | ISDN_HAVECHARGE | ISDN_MANCHARGE; |
| lp->chargeint = cfg->chargeint * HZ; |
| } |
| if (cfg->p_encap != lp->p_encap) { |
| if (cfg->p_encap == ISDN_NET_ENCAP_RAWIP) { |
| p->dev->header_ops = NULL; |
| p->dev->flags = IFF_NOARP|IFF_POINTOPOINT; |
| } else { |
| p->dev->header_ops = &isdn_header_ops; |
| if (cfg->p_encap == ISDN_NET_ENCAP_ETHER) |
| p->dev->flags = IFF_BROADCAST | IFF_MULTICAST; |
| else |
| p->dev->flags = IFF_NOARP|IFF_POINTOPOINT; |
| } |
| } |
| lp->p_encap = cfg->p_encap; |
| return 0; |
| } |
| return -ENODEV; |
| } |
| |
| /* |
| * Perform get-interface-parameters.ioctl |
| */ |
| int |
| isdn_net_getcfg(isdn_net_ioctl_cfg * cfg) |
| { |
| isdn_net_dev *p = isdn_net_findif(cfg->name); |
| |
| if (p) { |
| isdn_net_local *lp = p->local; |
| |
| strcpy(cfg->eaz, lp->msn); |
| cfg->exclusive = lp->exclusive; |
| if (lp->pre_device >= 0) { |
| sprintf(cfg->drvid, "%s,%d", dev->drvid[lp->pre_device], |
| lp->pre_channel); |
| } else |
| cfg->drvid[0] = '\0'; |
| cfg->onhtime = lp->onhtime; |
| cfg->charge = lp->charge; |
| cfg->l2_proto = lp->l2_proto; |
| cfg->l3_proto = lp->l3_proto; |
| cfg->p_encap = lp->p_encap; |
| cfg->secure = (lp->flags & ISDN_NET_SECURE) ? 1 : 0; |
| cfg->callback = 0; |
| if (lp->flags & ISDN_NET_CALLBACK) |
| cfg->callback = 1; |
| if (lp->flags & ISDN_NET_CBOUT) |
| cfg->callback = 2; |
| cfg->cbhup = (lp->flags & ISDN_NET_CBHUP) ? 1 : 0; |
| cfg->dialmode = lp->flags & ISDN_NET_DIALMODE_MASK; |
| cfg->chargehup = (lp->hupflags & 4) ? 1 : 0; |
| cfg->ihup = (lp->hupflags & 8) ? 1 : 0; |
| cfg->cbdelay = lp->cbdelay; |
| cfg->dialmax = lp->dialmax; |
| cfg->triggercps = lp->triggercps; |
| cfg->slavedelay = lp->slavedelay / HZ; |
| cfg->chargeint = (lp->hupflags & ISDN_CHARGEHUP) ? |
| (lp->chargeint / HZ) : 0; |
| cfg->pppbind = lp->pppbind; |
| cfg->dialtimeout = lp->dialtimeout >= 0 ? lp->dialtimeout / HZ : -1; |
| cfg->dialwait = lp->dialwait / HZ; |
| if (lp->slave) { |
| if (strlen(lp->slave->name) > 8) |
| 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) > 8) |
| strcpy(cfg->master, "too-long"); |
| 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 = (((isdn_net_local *) q->priv)->slave); |
| } |
| 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 *) (p->local->master->priv))->slave == p->dev) |
| ((isdn_net_local *) (p->local->master->priv))->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; |
| } |