drivers/isdn/i4l/isdn_net.c

   1 /* $Id: isdn_net.c,v 1.1.2.2 2004/01/12 22:37:19 keil Exp $
   2  *
   3  * Linux ISDN subsystem, network interfaces and related functions (linklevel).
   4  *
   5  * Copyright 1994-1998  by Fritz Elfert (fritz@isdn4linux.de)
   6  * Copyright 1995,96    by Thinking Objects Software GmbH Wuerzburg
   7  * Copyright 1995,96    by Michael Hipp (Michael.Hipp@student.uni-tuebingen.de)
   8  *
   9  * This software may be used and distributed according to the terms
  10  * of the GNU General Public License, incorporated herein by reference.
  11  *
  12  * Data Over Voice (DOV) support added - Guy Ellis 23-Mar-02
  13  *                                       guy@traverse.com.au
  14  * Outgoing calls - looks for a 'V' in first char of dialed number
  15  * Incoming calls - checks first character of eaz as follows:
  16  *   Numeric - accept DATA only - original functionality
  17  *   'V'     - accept VOICE (DOV) only
  18  *   'B'     - accept BOTH DATA and DOV types
  19  *
  20  * Jan 2001: fix CISCO HDLC      Bjoern A. Zeeb <i4l@zabbadoz.net>
  21  *           for info on the protocol, see
  22  *           http://i4l.zabbadoz.net/i4l/cisco-hdlc.txt
  23  */
  24
  25 #include <linux/isdn.h>
  26 #include <linux/slab.h>
  27 #include <net/arp.h>
  28 #include <net/dst.h>
  29 #include <net/pkt_sched.h>
  30 #include <linux/inetdevice.h>
  31 #include "isdn_common.h"
  32 #include "isdn_net.h"
  33 #ifdef CONFIG_ISDN_PPP
  34 #include "isdn_ppp.h"
  35 #endif
  36 #ifdef CONFIG_ISDN_X25
  37 #include <linux/concap.h>
  38 #include "isdn_concap.h"
  39 #endif
  40
  41
  42 /*
  43  * Outline of new tbusy handling:
  44  *
  45  * Old method, roughly spoken, consisted of setting tbusy when entering
  46  * isdn_net_start_xmit() and at several other locations and clearing
  47  * it from isdn_net_start_xmit() thread when sending was successful.
  48  *
  49  * With 2.3.x multithreaded network core, to prevent problems, tbusy should
  50  * only be set by the isdn_net_start_xmit() thread and only when a tx-busy
  51  * condition is detected. Other threads (in particular isdn_net_stat_callb())
  52  * are only allowed to clear tbusy.
  53  *
  54  * -HE
  55  */
  56
  57 /*
  58  * About SOFTNET:
  59  * Most of the changes were pretty obvious and basically done by HE already.
  60  *
  61  * One problem of the isdn net device code is that is uses struct net_device
  62  * for masters and slaves. However, only master interface are registered to
  63  * the network layer, and therefore, it only makes sense to call netif_*
  64  * functions on them.
  65  *
  66  * --KG
  67  */
  68
  69 /*
  70  * Find out if the netdevice has been ifup-ed yet.
  71  * For slaves, look at the corresponding master.
  72  */
  73 static __inline__ int isdn_net_device_started(isdn_net_dev *n)
  74 {
  75         isdn_net_local *lp = n->local;
  76         struct net_device *dev;
  77
  78         if (lp->master)
  79                 dev = lp->master;
  80         else
  81                 dev = n->dev;
  82         return netif_running(dev);
  83 }
  84
  85 /*
  86  * wake up the network -> net_device queue.
  87  * For slaves, wake the corresponding master interface.
  88  */
  89 static __inline__ void isdn_net_device_wake_queue(isdn_net_local *lp)
  90 {
  91         if (lp->master)
  92                 netif_wake_queue(lp->master);
  93         else
  94                 netif_wake_queue(lp->netdev->dev);
  95 }
  96
  97 /*
  98  * stop the network -> net_device queue.
  99  * For slaves, stop the corresponding master interface.
 100  */
 101 static __inline__ void isdn_net_device_stop_queue(isdn_net_local *lp)
 102 {
 103         if (lp->master)
 104                 netif_stop_queue(lp->master);
 105         else
 106                 netif_stop_queue(lp->netdev->dev);
 107 }
 108
 109 /*
 110  * find out if the net_device which this lp belongs to (lp can be
 111  * master or slave) is busy. It's busy iff all (master and slave)
 112  * queues are busy
 113  */
 114 static __inline__ int isdn_net_device_busy(isdn_net_local *lp)
 115 {
 116         isdn_net_local *nlp;
 117         isdn_net_dev *nd;
 118         unsigned long flags;
 119
 120         if (!isdn_net_lp_busy(lp))
 121                 return 0;
 122
 123         if (lp->master)
 124                 nd = ISDN_MASTER_PRIV(lp)->netdev;
 125         else
 126                 nd = lp->netdev;
 127
 128         spin_lock_irqsave(&nd->queue_lock, flags);
 129         nlp = lp->next;
 130         while (nlp != lp) {
 131                 if (!isdn_net_lp_busy(nlp)) {
 132                         spin_unlock_irqrestore(&nd->queue_lock, flags);
 133                         return 0;
 134                 }
 135                 nlp = nlp->next;
 136         }
 137         spin_unlock_irqrestore(&nd->queue_lock, flags);
 138         return 1;
 139 }
 140
 141 static __inline__ void isdn_net_inc_frame_cnt(isdn_net_local *lp)
 142 {
 143         atomic_inc(&lp->frame_cnt);
 144         if (isdn_net_device_busy(lp))
 145                 isdn_net_device_stop_queue(lp);
 146 }
 147
 148 static __inline__ void isdn_net_dec_frame_cnt(isdn_net_local *lp)
 149 {
 150         atomic_dec(&lp->frame_cnt);
 151
 152         if (!(isdn_net_device_busy(lp))) {
 153                 if (!skb_queue_empty(&lp->super_tx_queue)) {
 154                         schedule_work(&lp->tqueue);
 155                 } else {
 156                         isdn_net_device_wake_queue(lp);
 157                 }
 158        }
 159 }
 160
 161 static __inline__ void isdn_net_zero_frame_cnt(isdn_net_local *lp)
 162 {
 163         atomic_set(&lp->frame_cnt, 0);
 164 }
 165
 166 /* For 2.2.x we leave the transmitter busy timeout at 2 secs, just
 167  * to be safe.
 168  * For 2.3.x we push it up to 20 secs, because call establishment
 169  * (in particular callback) may take such a long time, and we
 170  * don't want confusing messages in the log. However, there is a slight
 171  * possibility that this large timeout will break other things like MPPP,
 172  * which might rely on the tx timeout. If so, we'll find out this way...
 173  */
 174
 175 #define ISDN_NET_TX_TIMEOUT (20*HZ)
 176
 177 /* Prototypes */
 178
 179 static int isdn_net_force_dial_lp(isdn_net_local *);
 180 static netdev_tx_t isdn_net_start_xmit(struct sk_buff *,
 181                                              struct net_device *);
 182
 183 static void isdn_net_ciscohdlck_connected(isdn_net_local *lp);
 184 static void isdn_net_ciscohdlck_disconnected(isdn_net_local *lp);
 185
 186 char *isdn_net_revision = "$Revision: 1.1.2.2 $";
 187
 188  /*
 189   * Code for raw-networking over ISDN
 190   */
 191
 192 static void
 193 isdn_net_unreachable(struct net_device *dev, struct sk_buff *skb, char *reason)
 194 {
 195         if(skb) {
 196
 197                 u_short proto = ntohs(skb->protocol);
 198
 199                 printk(KERN_DEBUG "isdn_net: %s: %s, signalling dst_link_failure %s\n",
 200                        dev->name,
 201                        (reason != NULL) ? reason : "unknown",
 202                        (proto != ETH_P_IP) ? "Protocol != ETH_P_IP" : "");
 203
 204                 dst_link_failure(skb);
 205         }
 206         else {  /* dial not triggered by rawIP packet */
 207                 printk(KERN_DEBUG "isdn_net: %s: %s\n",
 208                            dev->name,
 209                            (reason != NULL) ? reason : "reason unknown");
 210         }
 211 }
 212
 213 static void
 214 isdn_net_reset(struct net_device *dev)
 215 {
 216 #ifdef CONFIG_ISDN_X25
 217         struct concap_device_ops * dops =
 218                 ((isdn_net_local *) netdev_priv(dev))->dops;
 219         struct concap_proto * cprot =
 220                 ((isdn_net_local *) netdev_priv(dev))->netdev->cprot;
 221 #endif
 222 #ifdef CONFIG_ISDN_X25
 223         if( cprot && cprot -> pops && dops )
 224                 cprot -> pops -> restart ( cprot, dev, dops );
 225 #endif
 226 }
 227
 228 /* Open/initialize the board. */
 229 static int
 230 isdn_net_open(struct net_device *dev)
 231 {
 232         int i;
 233         struct net_device *p;
 234         struct in_device *in_dev;
 235
 236         /* moved here from isdn_net_reset, because only the master has an
 237            interface associated which is supposed to be started. BTW:
 238            we need to call netif_start_queue, not netif_wake_queue here */
 239         netif_start_queue(dev);
 240
 241         isdn_net_reset(dev);
 242         /* Fill in the MAC-level header (not needed, but for compatibility... */
 243         for (i = 0; i < ETH_ALEN - sizeof(u32); i++)
 244                 dev->dev_addr[i] = 0xfc;
 245         if ((in_dev = dev->ip_ptr) != NULL) {
 246                 /*
 247                  *      Any address will do - we take the first
 248                  */
 249                 struct in_ifaddr *ifa = in_dev->ifa_list;
 250                 if (ifa != NULL)
 251                         memcpy(dev->dev_addr+2, &ifa->ifa_local, 4);
 252         }
 253
 254         /* If this interface has slaves, start them also */
 255         p = MASTER_TO_SLAVE(dev);
 256         if (p) {
 257                 while (p) {
 258                         isdn_net_reset(p);
 259                         p = MASTER_TO_SLAVE(p);
 260                 }
 261         }
 262         isdn_lock_drivers();
 263         return 0;
 264 }
 265
 266 /*
 267  * Assign an ISDN-channel to a net-interface
 268  */
 269 static void
 270 isdn_net_bind_channel(isdn_net_local * lp, int idx)
 271 {
 272         lp->flags |= ISDN_NET_CONNECTED;
 273         lp->isdn_device = dev->drvmap[idx];
 274         lp->isdn_channel = dev->chanmap[idx];
 275         dev->rx_netdev[idx] = lp->netdev;
 276         dev->st_netdev[idx] = lp->netdev;
 277 }
 278
 279 /*
 280  * unbind a net-interface (resets interface after an error)
 281  */
 282 static void
 283 isdn_net_unbind_channel(isdn_net_local * lp)
 284 {
 285         skb_queue_purge(&lp->super_tx_queue);
 286
 287         if (!lp->master) {      /* reset only master device */
 288                 /* Moral equivalent of dev_purge_queues():
 289                    BEWARE! This chunk of code cannot be called from hardware
 290                    interrupt handler. I hope it is true. --ANK
 291                  */
 292                 qdisc_reset_all_tx(lp->netdev->dev);
 293         }
 294         lp->dialstate = 0;
 295         dev->rx_netdev[isdn_dc2minor(lp->isdn_device, lp->isdn_channel)] = NULL;
 296         dev->st_netdev[isdn_dc2minor(lp->isdn_device, lp->isdn_channel)] = NULL;
 297         if (lp->isdn_device != -1 && lp->isdn_channel != -1)
 298                 isdn_free_channel(lp->isdn_device, lp->isdn_channel,
 299                                   ISDN_USAGE_NET);
 300         lp->flags &= ~ISDN_NET_CONNECTED;
 301         lp->isdn_device = -1;
 302         lp->isdn_channel = -1;
 303 }
 304
 305 /*
 306  * Perform auto-hangup and cps-calculation for net-interfaces.
 307  *
 308  * auto-hangup:
 309  * Increment idle-counter (this counter is reset on any incoming or
 310  * outgoing packet), if counter exceeds configured limit either do a
 311  * hangup immediately or - if configured - wait until just before the next
 312  * charge-info.
 313  *
 314  * cps-calculation (needed for dynamic channel-bundling):
 315  * Since this function is called every second, simply reset the
 316  * byte-counter of the interface after copying it to the cps-variable.
 317  */
 318 static unsigned long last_jiffies = -HZ;
 319
 320 void
 321 isdn_net_autohup(void)
 322 {
 323         isdn_net_dev *p = dev->netdev;
 324         int anymore;
 325
 326         anymore = 0;
 327         while (p) {
 328                 isdn_net_local *l = p->local;
 329                 if (jiffies == last_jiffies)
 330                         l->cps = l->transcount;
 331                 else
 332                         l->cps = (l->transcount * HZ) / (jiffies - last_jiffies);
 333                 l->transcount = 0;
 334                 if (dev->net_verbose > 3)
 335                         printk(KERN_DEBUG "%s: %d bogocps\n", p->dev->name, l->cps);
 336                 if ((l->flags & ISDN_NET_CONNECTED) && (!l->dialstate)) {
 337                         anymore = 1;
 338                         l->huptimer++;
 339                         /*
 340                          * if there is some dialmode where timeout-hangup
 341                          * should _not_ be done, check for that here
 342                          */
 343                         if ((l->onhtime) &&
 344                             (l->huptimer > l->onhtime))
 345                         {
 346                                 if (l->hupflags & ISDN_MANCHARGE &&
 347                                     l->hupflags & ISDN_CHARGEHUP) {
 348                                         while (time_after(jiffies, l->chargetime + l->chargeint))
 349                                                 l->chargetime += l->chargeint;
 350                                         if (time_after(jiffies, l->chargetime + l->chargeint - 2 * HZ))
 351                                                 if (l->outgoing || l->hupflags & ISDN_INHUP)
 352                                                         isdn_net_hangup(p->dev);
 353                                 } else if (l->outgoing) {
 354                                         if (l->hupflags & ISDN_CHARGEHUP) {
 355                                                 if (l->hupflags & ISDN_WAITCHARGE) {
 356                                                         printk(KERN_DEBUG "isdn_net: Hupflags of %s are %X\n",
 357                                                                p->dev->name, l->hupflags);
 358                                                         isdn_net_hangup(p->dev);
 359                                                 } else if (time_after(jiffies, l->chargetime + l->chargeint)) {
 360                                                         printk(KERN_DEBUG
 361                                                                "isdn_net: %s: chtime = %lu, chint = %d\n",
 362                                                                p->dev->name, l->chargetime, l->chargeint);
 363                                                         isdn_net_hangup(p->dev);
 364                                                 }
 365                                         } else
 366                                                 isdn_net_hangup(p->dev);
 367                                 } else if (l->hupflags & ISDN_INHUP)
 368                                         isdn_net_hangup(p->dev);
 369                         }
 370
 371                         if(dev->global_flags & ISDN_GLOBAL_STOPPED || (ISDN_NET_DIALMODE(*l) == ISDN_NET_DM_OFF)) {
 372                                 isdn_net_hangup(p->dev);
 373                                 break;
 374                         }
 375                 }
 376                 p = (isdn_net_dev *) p->next;
 377         }
 378         last_jiffies = jiffies;
 379         isdn_timer_ctrl(ISDN_TIMER_NETHANGUP, anymore);
 380 }
 381
 382 static void isdn_net_lp_disconnected(isdn_net_local *lp)
 383 {
 384         isdn_net_rm_from_bundle(lp);
 385 }
 386
 387 /*
 388  * Handle status-messages from ISDN-interfacecard.
 389  * This function is called from within the main-status-dispatcher
 390  * isdn_status_callback, which itself is called from the low-level driver.
 391  * Return: 1 = Event handled, 0 = not for us or unknown Event.
 392  */
 393 int
 394 isdn_net_stat_callback(int idx, isdn_ctrl *c)
 395 {
 396         isdn_net_dev *p = dev->st_netdev[idx];
 397         int cmd = c->command;
 398
 399         if (p) {
 400                 isdn_net_local *lp = p->local;
 401 #ifdef CONFIG_ISDN_X25
 402                 struct concap_proto *cprot = lp->netdev->cprot;
 403                 struct concap_proto_ops *pops = cprot ? cprot->pops : NULL;
 404 #endif
 405                 switch (cmd) {
 406                         case ISDN_STAT_BSENT:
 407                                 /* A packet has successfully been sent out */
 408                                 if ((lp->flags & ISDN_NET_CONNECTED) &&
 409                                     (!lp->dialstate)) {
 410                                         isdn_net_dec_frame_cnt(lp);
 411                                         lp->stats.tx_packets++;
 412                                         lp->stats.tx_bytes += c->parm.length;
 413                                 }
 414                                 return 1;
 415                         case ISDN_STAT_DCONN:
 416                                 /* D-Channel is up */
 417                                 switch (lp->dialstate) {
 418                                         case 4:
 419                                         case 7:
 420                                         case 8:
 421                                                 lp->dialstate++;
 422                                                 return 1;
 423                                         case 12:
 424                                                 lp->dialstate = 5;
 425                                                 return 1;
 426                                 }
 427                                 break;
 428                         case ISDN_STAT_DHUP:
 429                                 /* Either D-Channel-hangup or error during dialout */
 430 #ifdef CONFIG_ISDN_X25
 431                                 /* If we are not connencted then dialing had
 432                                    failed. If there are generic encap protocol
 433                                    receiver routines signal the closure of
 434                                    the link*/
 435
 436                                 if( !(lp->flags & ISDN_NET_CONNECTED)
 437                                     && pops && pops -> disconn_ind )
 438                                         pops -> disconn_ind(cprot);
 439 #endif /* CONFIG_ISDN_X25 */
 440                                 if ((!lp->dialstate) && (lp->flags & ISDN_NET_CONNECTED)) {
 441                                         if (lp->p_encap == ISDN_NET_ENCAP_CISCOHDLCK)
 442                                                 isdn_net_ciscohdlck_disconnected(lp);
 443 #ifdef CONFIG_ISDN_PPP
 444                                         if (lp->p_encap == ISDN_NET_ENCAP_SYNCPPP)
 445                                                 isdn_ppp_free(lp);
 446 #endif
 447                                         isdn_net_lp_disconnected(lp);
 448                                         isdn_all_eaz(lp->isdn_device, lp->isdn_channel);
 449                                         printk(KERN_INFO "%s: remote hangup\n", p->dev->name);
 450                                         printk(KERN_INFO "%s: Chargesum is %d\n", p->dev->name,
 451                                                lp->charge);
 452                                         isdn_net_unbind_channel(lp);
 453                                         return 1;
 454                                 }
 455                                 break;
 456 #ifdef CONFIG_ISDN_X25
 457                         case ISDN_STAT_BHUP:
 458                                 /* B-Channel-hangup */
 459                                 /* try if there are generic encap protocol
 460                                    receiver routines and signal the closure of
 461                                    the link */
 462                                 if( pops  &&  pops -> disconn_ind ){
 463                                                 pops -> disconn_ind(cprot);
 464                                                 return 1;
 465                                         }
 466                                 break;
 467 #endif /* CONFIG_ISDN_X25 */
 468                         case ISDN_STAT_BCONN:
 469                                 /* B-Channel is up */
 470                                 isdn_net_zero_frame_cnt(lp);
 471                                 switch (lp->dialstate) {
 472                                         case 5:
 473                                         case 6:
 474                                         case 7:
 475                                         case 8:
 476                                         case 9:
 477                                         case 10:
 478                                         case 12:
 479                                                 if (lp->dialstate <= 6) {
 480                                                         dev->usage[idx] |= ISDN_USAGE_OUTGOING;
 481                                                         isdn_info_update();
 482                                                 } else
 483                                                         dev->rx_netdev[idx] = p;
 484                                                 lp->dialstate = 0;
 485                                                 isdn_timer_ctrl(ISDN_TIMER_NETHANGUP, 1);
 486                                                 if (lp->p_encap == ISDN_NET_ENCAP_CISCOHDLCK)
 487                                                         isdn_net_ciscohdlck_connected(lp);
 488                                                 if (lp->p_encap != ISDN_NET_ENCAP_SYNCPPP) {
 489                                                         if (lp->master) { /* is lp a slave? */
 490                                                                 isdn_net_dev *nd = ISDN_MASTER_PRIV(lp)->netdev;
 491                                                                 isdn_net_add_to_bundle(nd, lp);
 492                                                         }
 493                                                 }
 494                                                 printk(KERN_INFO "isdn_net: %s connected\n", p->dev->name);
 495                                                 /* If first Chargeinfo comes before B-Channel connect,
 496                                                  * we correct the timestamp here.
 497                                                  */
 498                                                 lp->chargetime = jiffies;
 499
 500                                                 /* reset dial-timeout */
 501                                                 lp->dialstarted = 0;
 502                                                 lp->dialwait_timer = 0;
 503
 504 #ifdef CONFIG_ISDN_PPP
 505                                                 if (lp->p_encap == ISDN_NET_ENCAP_SYNCPPP)
 506                                                         isdn_ppp_wakeup_daemon(lp);
 507 #endif
 508 #ifdef CONFIG_ISDN_X25
 509                                                 /* try if there are generic concap receiver routines */
 510                                                 if( pops )
 511                                                         if( pops->connect_ind)
 512                                                                 pops->connect_ind(cprot);
 513 #endif /* CONFIG_ISDN_X25 */
 514                                                 /* ppp needs to do negotiations first */
 515                                                 if (lp->p_encap != ISDN_NET_ENCAP_SYNCPPP)
 516                                                         isdn_net_device_wake_queue(lp);
 517                                                 return 1;
 518                                 }
 519                                 break;
 520                         case ISDN_STAT_NODCH:
 521                                 /* No D-Channel avail. */
 522                                 if (lp->dialstate == 4) {
 523                                         lp->dialstate--;
 524                                         return 1;
 525                                 }
 526                                 break;
 527                         case ISDN_STAT_CINF:
 528                                 /* Charge-info from TelCo. Calculate interval between
 529                                  * charge-infos and set timestamp for last info for
 530                                  * usage by isdn_net_autohup()
 531                                  */
 532                                 lp->charge++;
 533                                 if (lp->hupflags & ISDN_HAVECHARGE) {
 534                                         lp->hupflags &= ~ISDN_WAITCHARGE;
 535                                         lp->chargeint = jiffies - lp->chargetime - (2 * HZ);
 536                                 }
 537                                 if (lp->hupflags & ISDN_WAITCHARGE)
 538                                         lp->hupflags |= ISDN_HAVECHARGE;
 539                                 lp->chargetime = jiffies;
 540                                 printk(KERN_DEBUG "isdn_net: Got CINF chargetime of %s now %lu\n",
 541                                        p->dev->name, lp->chargetime);
 542                                 return 1;
 543                 }
 544         }
 545         return 0;
 546 }
 547
 548 /*
 549  * Perform dialout for net-interfaces and timeout-handling for
 550  * D-Channel-up and B-Channel-up Messages.
 551  * This function is initially called from within isdn_net_start_xmit() or
 552  * or isdn_net_find_icall() after initializing the dialstate for an
 553  * interface. If further calls are needed, the function schedules itself
 554  * for a timer-callback via isdn_timer_function().
 555  * The dialstate is also affected by incoming status-messages from
 556  * the ISDN-Channel which are handled in isdn_net_stat_callback() above.
 557  */
 558 void
 559 isdn_net_dial(void)
 560 {
 561         isdn_net_dev *p = dev->netdev;
 562         int anymore = 0;
 563         int i;
 564         isdn_ctrl cmd;
 565         u_char *phone_number;
 566
 567         while (p) {
 568                 isdn_net_local *lp = p->local;
 569
 570 #ifdef ISDN_DEBUG_NET_DIAL
 571                 if (lp->dialstate)
 572                         printk(KERN_DEBUG "%s: dialstate=%d\n", p->dev->name, lp->dialstate);
 573 #endif
 574                 switch (lp->dialstate) {
 575                         case 0:
 576                                 /* Nothing to do for this interface */
 577                                 break;
 578                         case 1:
 579                                 /* Initiate dialout. Set phone-number-pointer to first number
 580                                  * of interface.
 581                                  */
 582                                 lp->dial = lp->phone[1];
 583                                 if (!lp->dial) {
 584                                         printk(KERN_WARNING "%s: phone number deleted?\n",
 585                                                p->dev->name);
 586                                         isdn_net_hangup(p->dev);
 587                                         break;
 588                                 }
 589                                 anymore = 1;
 590
 591                                 if(lp->dialtimeout > 0)
 592                                         if(lp->dialstarted == 0 || time_after(jiffies, lp->dialstarted + lp->dialtimeout + lp->dialwait)) {
 593                                                 lp->dialstarted = jiffies;
 594                                                 lp->dialwait_timer = 0;
 595                                         }
 596
 597                                 lp->dialstate++;
 598                                 /* Fall through */
 599                         case 2:
 600                                 /* Prepare dialing. Clear EAZ, then set EAZ. */
 601                                 cmd.driver = lp->isdn_device;
 602                                 cmd.arg = lp->isdn_channel;
 603                                 cmd.command = ISDN_CMD_CLREAZ;
 604                                 isdn_command(&cmd);
 605                                 sprintf(cmd.parm.num, "%s", isdn_map_eaz2msn(lp->msn, cmd.driver));
 606                                 cmd.command = ISDN_CMD_SETEAZ;
 607                                 isdn_command(&cmd);
 608                                 lp->dialretry = 0;
 609                                 anymore = 1;
 610                                 lp->dialstate++;
 611                                 /* Fall through */
 612                         case 3:
 613                                 /* Setup interface, dial current phone-number, switch to next number.
 614                                  * If list of phone-numbers is exhausted, increment
 615                                  * retry-counter.
 616                                  */
 617                                 if(dev->global_flags & ISDN_GLOBAL_STOPPED || (ISDN_NET_DIALMODE(*lp) == ISDN_NET_DM_OFF)) {
 618                                         char *s;
 619                                         if (dev->global_flags & ISDN_GLOBAL_STOPPED)
 620                                                 s = "dial suppressed: isdn system stopped";
 621                                         else
 622                                                 s = "dial suppressed: dialmode `off'";
 623                                         isdn_net_unreachable(p->dev, NULL, s);
 624                                         isdn_net_hangup(p->dev);
 625                                         break;
 626                                 }
 627                                 cmd.driver = lp->isdn_device;
 628                                 cmd.command = ISDN_CMD_SETL2;
 629                                 cmd.arg = lp->isdn_channel + (lp->l2_proto << 8);
 630                                 isdn_command(&cmd);
 631                                 cmd.driver = lp->isdn_device;
 632                                 cmd.command = ISDN_CMD_SETL3;
 633                                 cmd.arg = lp->isdn_channel + (lp->l3_proto << 8);
 634                                 isdn_command(&cmd);
 635                                 cmd.driver = lp->isdn_device;
 636                                 cmd.arg = lp->isdn_channel;
 637                                 if (!lp->dial) {
 638                                         printk(KERN_WARNING "%s: phone number deleted?\n",
 639                                                p->dev->name);
 640                                         isdn_net_hangup(p->dev);
 641                                         break;
 642                                 }
 643                                 if (!strncmp(lp->dial->num, "LEASED", strlen("LEASED"))) {
 644                                         lp->dialstate = 4;
 645                                         printk(KERN_INFO "%s: Open leased line ...\n", p->dev->name);
 646                                 } else {
 647                                         if(lp->dialtimeout > 0)
 648                                                 if (time_after(jiffies, lp->dialstarted + lp->dialtimeout)) {
 649                                                         lp->dialwait_timer = jiffies + lp->dialwait;
 650                                                         lp->dialstarted = 0;
 651                                                         isdn_net_unreachable(p->dev, NULL, "dial: timed out");
 652                                                         isdn_net_hangup(p->dev);
 653                                                         break;
 654                                                 }
 655
 656                                         cmd.driver = lp->isdn_device;
 657                                         cmd.command = ISDN_CMD_DIAL;
 658                                         cmd.parm.setup.si2 = 0;
 659
 660                                         /* check for DOV */
 661                                         phone_number = lp->dial->num;
 662                                         if ((*phone_number == 'v') ||
 663                                             (*phone_number == 'V')) { /* DOV call */
 664                                                 cmd.parm.setup.si1 = 1;
 665                                         } else { /* DATA call */
 666                                                 cmd.parm.setup.si1 = 7;
 667                                         }
 668
 669                                         strcpy(cmd.parm.setup.phone, phone_number);
 670                                         /*
 671                                          * Switch to next number or back to start if at end of list.
 672                                          */
 673                                         if (!(lp->dial = (isdn_net_phone *) lp->dial->next)) {
 674                                                 lp->dial = lp->phone[1];
 675                                                 lp->dialretry++;
 676
 677                                                 if (lp->dialretry > lp->dialmax) {
 678                                                         if (lp->dialtimeout == 0) {
 679                                                                 lp->dialwait_timer = jiffies + lp->dialwait;
 680                                                                 lp->dialstarted = 0;
 681                                                                 isdn_net_unreachable(p->dev, NULL, "dial: tried all numbers dialmax times");
 682                                                         }
 683                                                         isdn_net_hangup(p->dev);
 684                                                         break;
 685                                                 }
 686                                         }
 687                                         sprintf(cmd.parm.setup.eazmsn, "%s",
 688                                                 isdn_map_eaz2msn(lp->msn, cmd.driver));
 689                                         i = isdn_dc2minor(lp->isdn_device, lp->isdn_channel);
 690                                         if (i >= 0) {
 691                                                 strcpy(dev->num[i], cmd.parm.setup.phone);
 692                                                 dev->usage[i] |= ISDN_USAGE_OUTGOING;
 693                                                 isdn_info_update();
 694                                         }
 695                                         printk(KERN_INFO "%s: dialing %d %s... %s\n", p->dev->name,
 696                                                lp->dialretry, cmd.parm.setup.phone,
 697                                                (cmd.parm.setup.si1 == 1) ? "DOV" : "");
 698                                         lp->dtimer = 0;
 699 #ifdef ISDN_DEBUG_NET_DIAL
 700                                         printk(KERN_DEBUG "dial: d=%d c=%d\n", lp->isdn_device,
 701                                                lp->isdn_channel);
 702 #endif
 703                                         isdn_command(&cmd);
 704                                 }
 705                                 lp->huptimer = 0;
 706                                 lp->outgoing = 1;
 707                                 if (lp->chargeint) {
 708                                         lp->hupflags |= ISDN_HAVECHARGE;
 709                                         lp->hupflags &= ~ISDN_WAITCHARGE;
 710                                 } else {
 711                                         lp->hupflags |= ISDN_WAITCHARGE;
 712                                         lp->hupflags &= ~ISDN_HAVECHARGE;
 713                                 }
 714                                 anymore = 1;
 715                                 lp->dialstate =
 716                                     (lp->cbdelay &&
 717                                      (lp->flags & ISDN_NET_CBOUT)) ? 12 : 4;
 718                                 break;
 719                         case 4:
 720                                 /* Wait for D-Channel-connect.
 721                                  * If timeout, switch back to state 3.
 722                                  * Dialmax-handling moved to state 3.
 723                                  */
 724                                 if (lp->dtimer++ > ISDN_TIMER_DTIMEOUT10)
 725                                         lp->dialstate = 3;
 726                                 anymore = 1;
 727                                 break;
 728                         case 5:
 729                                 /* Got D-Channel-Connect, send B-Channel-request */
 730                                 cmd.driver = lp->isdn_device;
 731                                 cmd.arg = lp->isdn_channel;
 732                                 cmd.command = ISDN_CMD_ACCEPTB;
 733                                 anymore = 1;
 734                                 lp->dtimer = 0;
 735                                 lp->dialstate++;
 736                                 isdn_command(&cmd);
 737                                 break;
 738                         case 6:
 739                                 /* Wait for B- or D-Channel-connect. If timeout,
 740                                  * switch back to state 3.
 741                                  */
 742 #ifdef ISDN_DEBUG_NET_DIAL
 743                                 printk(KERN_DEBUG "dialtimer2: %d\n", lp->dtimer);
 744 #endif
 745                                 if (lp->dtimer++ > ISDN_TIMER_DTIMEOUT10)
 746                                         lp->dialstate = 3;
 747                                 anymore = 1;
 748                                 break;
 749                         case 7:
 750                                 /* Got incoming Call, setup L2 and L3 protocols,
 751                                  * then wait for D-Channel-connect
 752                                  */
 753 #ifdef ISDN_DEBUG_NET_DIAL
 754                                 printk(KERN_DEBUG "dialtimer4: %d\n", lp->dtimer);
 755 #endif
 756                                 cmd.driver = lp->isdn_device;
 757                                 cmd.command = ISDN_CMD_SETL2;
 758                                 cmd.arg = lp->isdn_channel + (lp->l2_proto << 8);
 759                                 isdn_command(&cmd);
 760                                 cmd.driver = lp->isdn_device;
 761                                 cmd.command = ISDN_CMD_SETL3;
 762                                 cmd.arg = lp->isdn_channel + (lp->l3_proto << 8);
 763                                 isdn_command(&cmd);
 764                                 if (lp->dtimer++ > ISDN_TIMER_DTIMEOUT15)
 765                                         isdn_net_hangup(p->dev);
 766                                 else {
 767                                         anymore = 1;
 768                                         lp->dialstate++;
 769                                 }
 770                                 break;
 771                         case 9:
 772                                 /* Got incoming D-Channel-Connect, send B-Channel-request */
 773                                 cmd.driver = lp->isdn_device;
 774                                 cmd.arg = lp->isdn_channel;
 775                                 cmd.command = ISDN_CMD_ACCEPTB;
 776                                 isdn_command(&cmd);
 777                                 anymore = 1;
 778                                 lp->dtimer = 0;
 779                                 lp->dialstate++;
 780                                 break;
 781                         case 8:
 782                         case 10:
 783                                 /*  Wait for B- or D-channel-connect */
 784 #ifdef ISDN_DEBUG_NET_DIAL
 785                                 printk(KERN_DEBUG "dialtimer4: %d\n", lp->dtimer);
 786 #endif
 787                                 if (lp->dtimer++ > ISDN_TIMER_DTIMEOUT10)
 788                                         isdn_net_hangup(p->dev);
 789                                 else
 790                                         anymore = 1;
 791                                 break;
 792                         case 11:
 793                                 /* Callback Delay */
 794                                 if (lp->dtimer++ > lp->cbdelay)
 795                                         lp->dialstate = 1;
 796                                 anymore = 1;
 797                                 break;
 798                         case 12:
 799                                 /* Remote does callback. Hangup after cbdelay, then wait for incoming
 800                                  * call (in state 4).
 801                                  */
 802                                 if (lp->dtimer++ > lp->cbdelay)
 803                                 {
 804                                         printk(KERN_INFO "%s: hangup waiting for callback ...\n", p->dev->name);
 805                                         lp->dtimer = 0;
 806                                         lp->dialstate = 4;
 807                                         cmd.driver = lp->isdn_device;
 808                                         cmd.command = ISDN_CMD_HANGUP;
 809                                         cmd.arg = lp->isdn_channel;
 810                                         isdn_command(&cmd);
 811                                         isdn_all_eaz(lp->isdn_device, lp->isdn_channel);
 812                                 }
 813                                 anymore = 1;
 814                                 break;
 815                         default:
 816                                 printk(KERN_WARNING "isdn_net: Illegal dialstate %d for device %s\n",
 817                                        lp->dialstate, p->dev->name);
 818                 }
 819                 p = (isdn_net_dev *) p->next;
 820         }
 821         isdn_timer_ctrl(ISDN_TIMER_NETDIAL, anymore);
 822 }
 823
 824 /*
 825  * Perform hangup for a net-interface.
 826  */
 827 void
 828 isdn_net_hangup(struct net_device *d)
 829 {
 830         isdn_net_local *lp = netdev_priv(d);
 831         isdn_ctrl cmd;
 832 #ifdef CONFIG_ISDN_X25
 833         struct concap_proto *cprot = lp->netdev->cprot;
 834         struct concap_proto_ops *pops = cprot ? cprot->pops : NULL;
 835 #endif
 836
 837         if (lp->flags & ISDN_NET_CONNECTED) {
 838                 if (lp->slave != NULL) {
 839                         isdn_net_local *slp = ISDN_SLAVE_PRIV(lp);
 840                         if (slp->flags & ISDN_NET_CONNECTED) {
 841                                 printk(KERN_INFO
 842                                         "isdn_net: hang up slave %s before %s\n",
 843                                         lp->slave->name, d->name);
 844                                 isdn_net_hangup(lp->slave);
 845                         }
 846                 }
 847                 printk(KERN_INFO "isdn_net: local hangup %s\n", d->name);
 848 #ifdef CONFIG_ISDN_PPP
 849                 if (lp->p_encap == ISDN_NET_ENCAP_SYNCPPP)
 850                         isdn_ppp_free(lp);
 851 #endif
 852                 isdn_net_lp_disconnected(lp);
 853 #ifdef CONFIG_ISDN_X25
 854                 /* try if there are generic encap protocol
 855                    receiver routines and signal the closure of
 856                    the link */
 857                 if( pops && pops -> disconn_ind )
 858                   pops -> disconn_ind(cprot);
 859 #endif /* CONFIG_ISDN_X25 */
 860
 861                 cmd.driver = lp->isdn_device;
 862                 cmd.command = ISDN_CMD_HANGUP;
 863                 cmd.arg = lp->isdn_channel;
 864                 isdn_command(&cmd);
 865                 printk(KERN_INFO "%s: Chargesum is %d\n", d->name, lp->charge);
 866                 isdn_all_eaz(lp->isdn_device, lp->isdn_channel);
 867         }
 868         isdn_net_unbind_channel(lp);
 869 }
 870
 871 typedef struct {
 872         __be16 source;
 873         __be16 dest;
 874 } ip_ports;
 875
 876 static void
 877 isdn_net_log_skb(struct sk_buff * skb, isdn_net_local * lp)
 878 {
 879         /* hopefully, this was set correctly */
 880         const u_char *p = skb_network_header(skb);
 881         unsigned short proto = ntohs(skb->protocol);
 882         int data_ofs;
 883         ip_ports *ipp;
 884         char addinfo[100];
 885
 886         addinfo[0] = '\0';
 887         /* This check stolen from 2.1.72 dev_queue_xmit_nit() */
 888         if (p < skb->data || skb->network_header >= skb->tail) {
 889                 /* fall back to old isdn_net_log_packet method() */
 890                 char * buf = skb->data;
 891
 892                 printk(KERN_DEBUG "isdn_net: protocol %04x is buggy, dev %s\n", skb->protocol, lp->netdev->dev->name);
 893                 p = buf;
 894                 proto = ETH_P_IP;
 895                 switch (lp->p_encap) {
 896                         case ISDN_NET_ENCAP_IPTYP:
 897                                 proto = ntohs(*(__be16 *)&buf[0]);
 898                                 p = &buf[2];
 899                                 break;
 900                         case ISDN_NET_ENCAP_ETHER:
 901                                 proto = ntohs(*(__be16 *)&buf[12]);
 902                                 p = &buf[14];
 903                                 break;
 904                         case ISDN_NET_ENCAP_CISCOHDLC:
 905                                 proto = ntohs(*(__be16 *)&buf[2]);
 906                                 p = &buf[4];
 907                                 break;
 908 #ifdef CONFIG_ISDN_PPP
 909                         case ISDN_NET_ENCAP_SYNCPPP:
 910                                 proto = ntohs(skb->protocol);
 911                                 p = &buf[IPPP_MAX_HEADER];
 912                                 break;
 913 #endif
 914                 }
 915         }
 916         data_ofs = ((p[0] & 15) * 4);
 917         switch (proto) {
 918                 case ETH_P_IP:
 919                         switch (p[9]) {
 920                                 case 1:
 921                                         strcpy(addinfo, " ICMP");
 922                                         break;
 923                                 case 2:
 924                                         strcpy(addinfo, " IGMP");
 925                                         break;
 926                                 case 4:
 927                                         strcpy(addinfo, " IPIP");
 928                                         break;
 929                                 case 6:
 930                                         ipp = (ip_ports *) (&p[data_ofs]);
 931                                         sprintf(addinfo, " TCP, port: %d -> %d", ntohs(ipp->source),
 932                                                 ntohs(ipp->dest));
 933                                         break;
 934                                 case 8:
 935                                         strcpy(addinfo, " EGP");
 936                                         break;
 937                                 case 12:
 938                                         strcpy(addinfo, " PUP");
 939                                         break;
 940                                 case 17:
 941                                         ipp = (ip_ports *) (&p[data_ofs]);
 942                                         sprintf(addinfo, " UDP, port: %d -> %d", ntohs(ipp->source),
 943                                                 ntohs(ipp->dest));
 944                                         break;
 945                                 case 22:
 946                                         strcpy(addinfo, " IDP");
 947                                         break;
 948                         }
 949                         printk(KERN_INFO "OPEN: %pI4 -> %pI4%s\n",
 950                                p + 12, p + 16, addinfo);
 951                         break;
 952                 case ETH_P_ARP:
 953                         printk(KERN_INFO "OPEN: ARP %pI4 -> *.*.*.* ?%pI4\n",
 954                                p + 14, p + 24);
 955                         break;
 956         }
 957 }
 958
 959 /*
 960  * this function is used to send supervisory data, i.e. data which was
 961  * not received from the network layer, but e.g. frames from ipppd, CCP
 962  * reset frames etc.
 963  */
 964 void isdn_net_write_super(isdn_net_local *lp, struct sk_buff *skb)
 965 {
 966         if (in_irq()) {
 967                 // we can't grab the lock from irq context,
 968                 // so we just queue the packet
 969                 skb_queue_tail(&lp->super_tx_queue, skb);
 970                 schedule_work(&lp->tqueue);
 971                 return;
 972         }
 973
 974         spin_lock_bh(&lp->xmit_lock);
 975         if (!isdn_net_lp_busy(lp)) {
 976                 isdn_net_writebuf_skb(lp, skb);
 977         } else {
 978                 skb_queue_tail(&lp->super_tx_queue, skb);
 979         }
 980         spin_unlock_bh(&lp->xmit_lock);
 981 }
 982
 983 /*
 984  * called from tq_immediate
 985  */
 986 static void isdn_net_softint(struct work_struct *work)
 987 {
 988         isdn_net_local *lp = container_of(work, isdn_net_local, tqueue);
 989         struct sk_buff *skb;
 990
 991         spin_lock_bh(&lp->xmit_lock);
 992         while (!isdn_net_lp_busy(lp)) {
 993                 skb = skb_dequeue(&lp->super_tx_queue);
 994                 if (!skb)
 995                         break;
 996                 isdn_net_writebuf_skb(lp, skb);
 997         }
 998         spin_unlock_bh(&lp->xmit_lock);
 999 }
1000
1001 /*
1002  * all frames sent from the (net) LL to a HL driver should go via this function
1003  * it's serialized by the caller holding the lp->xmit_lock spinlock
1004  */
1005 void isdn_net_writebuf_skb(isdn_net_local *lp, struct sk_buff *skb)
1006 {
1007         int ret;
1008         int len = skb->len;     /* save len */
1009
1010         /* before obtaining the lock the caller should have checked that
1011            the lp isn't busy */
1012         if (isdn_net_lp_busy(lp)) {
1013                 printk("isdn BUG at %s:%d!\n", __FILE__, __LINE__);
1014                 goto error;
1015         }
1016
1017         if (!(lp->flags & ISDN_NET_CONNECTED)) {
1018                 printk("isdn BUG at %s:%d!\n", __FILE__, __LINE__);
1019                 goto error;
1020         }
1021         ret = isdn_writebuf_skb_stub(lp->isdn_device, lp->isdn_channel, 1, skb);
1022         if (ret != len) {
1023                 /* we should never get here */
1024                 printk(KERN_WARNING "%s: HL driver queue full\n", lp->netdev->dev->name);
1025                 goto error;
1026         }
1027
1028         lp->transcount += len;
1029         isdn_net_inc_frame_cnt(lp);
1030         return;
1031
1032  error:
1033         dev_kfree_skb(skb);
1034         lp->stats.tx_errors++;
1035
1036 }
1037
1038
1039 /*
1040  *  Helper function for isdn_net_start_xmit.
1041  *  When called, the connection is already established.
1042  *  Based on cps-calculation, check if device is overloaded.
1043  *  If so, and if a slave exists, trigger dialing for it.
1044  *  If any slave is online, deliver packets using a simple round robin
1045  *  scheme.
1046  *
1047  *  Return: 0 on success, !0 on failure.
1048  */
1049
1050 static int
1051 isdn_net_xmit(struct net_device *ndev, struct sk_buff *skb)
1052 {
1053         isdn_net_dev *nd;
1054         isdn_net_local *slp;
1055         isdn_net_local *lp = netdev_priv(ndev);
1056         int retv = NETDEV_TX_OK;
1057
1058         if (((isdn_net_local *) netdev_priv(ndev))->master) {
1059                 printk("isdn BUG at %s:%d!\n", __FILE__, __LINE__);
1060                 dev_kfree_skb(skb);
1061                 return NETDEV_TX_OK;
1062         }
1063
1064         /* For the other encaps the header has already been built */
1065 #ifdef CONFIG_ISDN_PPP
1066         if (lp->p_encap == ISDN_NET_ENCAP_SYNCPPP) {
1067                 return isdn_ppp_xmit(skb, ndev);
1068         }
1069 #endif
1070         nd = ((isdn_net_local *) netdev_priv(ndev))->netdev;
1071         lp = isdn_net_get_locked_lp(nd);
1072         if (!lp) {
1073                 printk(KERN_WARNING "%s: all channels busy - requeuing!\n", ndev->name);
1074                 return NETDEV_TX_BUSY;
1075         }
1076         /* we have our lp locked from now on */
1077
1078         /* Reset hangup-timeout */
1079         lp->huptimer = 0; // FIXME?
1080         isdn_net_writebuf_skb(lp, skb);
1081         spin_unlock_bh(&lp->xmit_lock);
1082
1083         /* the following stuff is here for backwards compatibility.
1084          * in future, start-up and hangup of slaves (based on current load)
1085          * should move to userspace and get based on an overall cps
1086          * calculation
1087          */
1088         if (lp->cps > lp->triggercps) {
1089                 if (lp->slave) {
1090                         if (!lp->sqfull) {
1091                                 /* First time overload: set timestamp only */
1092                                 lp->sqfull = 1;
1093                                 lp->sqfull_stamp = jiffies;
1094                         } else {
1095                                 /* subsequent overload: if slavedelay exceeded, start dialing */
1096                                 if (time_after(jiffies, lp->sqfull_stamp + lp->slavedelay)) {
1097                                         slp = ISDN_SLAVE_PRIV(lp);
1098                                         if (!(slp->flags & ISDN_NET_CONNECTED)) {
1099                                                 isdn_net_force_dial_lp(ISDN_SLAVE_PRIV(lp));
1100                                         }
1101                                 }
1102                         }
1103                 }
1104         } else {
1105                 if (lp->sqfull && time_after(jiffies, lp->sqfull_stamp + lp->slavedelay + (10 * HZ))) {
1106                         lp->sqfull = 0;
1107                 }
1108                 /* this is a hack to allow auto-hangup for slaves on moderate loads */
1109                 nd->queue = nd->local;
1110         }
1111
1112         return retv;
1113
1114 }
1115
1116 static void
1117 isdn_net_adjust_hdr(struct sk_buff *skb, struct net_device *dev)
1118 {
1119         isdn_net_local *lp = netdev_priv(dev);
1120         if (!skb)
1121                 return;
1122         if (lp->p_encap == ISDN_NET_ENCAP_ETHER) {
1123                 const int pullsize = skb_network_offset(skb) - ETH_HLEN;
1124                 if (pullsize > 0) {
1125                         printk(KERN_DEBUG "isdn_net: Pull junk %d\n", pullsize);
1126                         skb_pull(skb, pullsize);
1127                 }
1128         }
1129 }
1130
1131
1132 static void isdn_net_tx_timeout(struct net_device * ndev)
1133 {
1134         isdn_net_local *lp = netdev_priv(ndev);
1135
1136         printk(KERN_WARNING "isdn_tx_timeout dev %s dialstate %d\n", ndev->name, lp->dialstate);
1137         if (!lp->dialstate){
1138                 lp->stats.tx_errors++;
1139                 /*
1140                  * There is a certain probability that this currently
1141                  * works at all because if we always wake up the interface,
1142                  * then upper layer will try to send the next packet
1143                  * immediately. And then, the old clean_up logic in the
1144                  * driver will hopefully continue to work as it used to do.
1145                  *
1146                  * This is rather primitive right know, we better should
1147                  * clean internal queues here, in particular for multilink and
1148                  * ppp, and reset HL driver's channel, too.   --HE
1149                  *
1150                  * actually, this may not matter at all, because ISDN hardware
1151                  * should not see transmitter hangs at all IMO
1152                  * changed KERN_DEBUG to KERN_WARNING to find out if this is
1153                  * ever called   --KG
1154                  */
1155         }
1156         ndev->trans_start = jiffies;
1157         netif_wake_queue(ndev);
1158 }
1159
1160 /*
1161  * Try sending a packet.
1162  * If this interface isn't connected to a ISDN-Channel, find a free channel,
1163  * and start dialing.
1164  */
1165 static netdev_tx_t
1166 isdn_net_start_xmit(struct sk_buff *skb, struct net_device *ndev)
1167 {
1168         isdn_net_local *lp = netdev_priv(ndev);
1169 #ifdef CONFIG_ISDN_X25
1170         struct concap_proto * cprot = lp -> netdev -> cprot;
1171 /* At this point hard_start_xmit() passes control to the encapsulation
1172    protocol (if present).
1173    For X.25 auto-dialing is completly bypassed because:
1174    - It does not conform with the semantics of a reliable datalink
1175      service as needed by X.25 PLP.
1176    - I don't want that the interface starts dialing when the network layer
1177      sends a message which requests to disconnect the lapb link (or if it
1178      sends any other message not resulting in data transmission).
1179    Instead, dialing will be initiated by the encapsulation protocol entity
1180    when a dl_establish request is received from the upper layer.
1181 */
1182         if (cprot && cprot -> pops) {
1183                 int ret = cprot -> pops -> encap_and_xmit ( cprot , skb);
1184
1185                 if (ret)
1186                         netif_stop_queue(ndev);
1187                 return ret;
1188         } else
1189 #endif
1190         /* auto-dialing xmit function */
1191         {
1192 #ifdef ISDN_DEBUG_NET_DUMP
1193                 u_char *buf;
1194 #endif
1195                 isdn_net_adjust_hdr(skb, ndev);
1196 #ifdef ISDN_DEBUG_NET_DUMP
1197                 buf = skb->data;
1198                 isdn_dumppkt("S:", buf, skb->len, 40);
1199 #endif
1200
1201                 if (!(lp->flags & ISDN_NET_CONNECTED)) {
1202                         int chi;
1203                         /* only do autodial if allowed by config */
1204                         if (!(ISDN_NET_DIALMODE(*lp) == ISDN_NET_DM_AUTO)) {
1205                                 isdn_net_unreachable(ndev, skb, "dial rejected: interface not in dialmode `auto'");
1206                                 dev_kfree_skb(skb);
1207                                 return NETDEV_TX_OK;
1208                         }
1209                         if (lp->phone[1]) {
1210                                 ulong flags;
1211
1212                                 if(lp->dialwait_timer <= 0)
1213                                         if(lp->dialstarted > 0 && lp->dialtimeout > 0 && time_before(jiffies, lp->dialstarted + lp->dialtimeout + lp->dialwait))
1214                                                 lp->dialwait_timer = lp->dialstarted + lp->dialtimeout + lp->dialwait;
1215
1216                                 if(lp->dialwait_timer > 0) {
1217                                         if(time_before(jiffies, lp->dialwait_timer)) {
1218                                                 isdn_net_unreachable(ndev, skb, "dial rejected: retry-time not reached");
1219                                                 dev_kfree_skb(skb);
1220                                                 return NETDEV_TX_OK;
1221                                         } else
1222                                                 lp->dialwait_timer = 0;
1223                                 }
1224                                 /* Grab a free ISDN-Channel */
1225                                 spin_lock_irqsave(&dev->lock, flags);
1226                                 if (((chi =
1227                                      isdn_get_free_channel(
1228                                                         ISDN_USAGE_NET,
1229                                                         lp->l2_proto,
1230                                                         lp->l3_proto,
1231                                                         lp->pre_device,
1232                                                         lp->pre_channel,
1233                                                         lp->msn)
1234                                                         ) < 0) &&
1235                                         ((chi =
1236                                      isdn_get_free_channel(
1237                                                         ISDN_USAGE_NET,
1238                                                         lp->l2_proto,
1239                                                         lp->l3_proto,
1240                                                         lp->pre_device,
1241                                                         lp->pre_channel^1,
1242                                                         lp->msn)
1243                                                         ) < 0)) {
1244                                         spin_unlock_irqrestore(&dev->lock, flags);
1245                                         isdn_net_unreachable(ndev, skb,
1246                                                            "No channel");
1247                                         dev_kfree_skb(skb);
1248                                         return NETDEV_TX_OK;
1249                                 }
1250                                 /* Log packet, which triggered dialing */
1251                                 if (dev->net_verbose)
1252                                         isdn_net_log_skb(skb, lp);
1253                                 lp->dialstate = 1;
1254                                 /* Connect interface with channel */
1255                                 isdn_net_bind_channel(lp, chi);
1256 #ifdef CONFIG_ISDN_PPP
1257                                 if (lp->p_encap == ISDN_NET_ENCAP_SYNCPPP) {
1258                                         /* no 'first_skb' handling for syncPPP */
1259                                         if (isdn_ppp_bind(lp) < 0) {
1260                                                 dev_kfree_skb(skb);
1261                                                 isdn_net_unbind_channel(lp);
1262                                                 spin_unlock_irqrestore(&dev->lock, flags);
1263                                                 return NETDEV_TX_OK;    /* STN (skb to nirvana) ;) */
1264                                         }
1265 #ifdef CONFIG_IPPP_FILTER
1266                                         if (isdn_ppp_autodial_filter(skb, lp)) {
1267                                                 isdn_ppp_free(lp);
1268                                                 isdn_net_unbind_channel(lp);
1269                                                 spin_unlock_irqrestore(&dev->lock, flags);
1270                                                 isdn_net_unreachable(ndev, skb, "dial rejected: packet filtered");
1271                                                 dev_kfree_skb(skb);
1272                                                 return NETDEV_TX_OK;
1273                                         }
1274 #endif
1275                                         spin_unlock_irqrestore(&dev->lock, flags);
1276                                         isdn_net_dial();        /* Initiate dialing */
1277                                         netif_stop_queue(ndev);
1278                                         return NETDEV_TX_BUSY;  /* let upper layer requeue skb packet */
1279                                 }
1280 #endif
1281                                 /* Initiate dialing */
1282                                 spin_unlock_irqrestore(&dev->lock, flags);
1283                                 isdn_net_dial();
1284                                 isdn_net_device_stop_queue(lp);
1285                                 return NETDEV_TX_BUSY;
1286                         } else {
1287                                 isdn_net_unreachable(ndev, skb,
1288                                                      "No phone number");
1289                                 dev_kfree_skb(skb);
1290                                 return NETDEV_TX_OK;
1291                         }
1292                 } else {
1293                         /* Device is connected to an ISDN channel */
1294                         ndev->trans_start = jiffies;
1295                         if (!lp->dialstate) {
1296                                 /* ISDN connection is established, try sending */
1297                                 int ret;
1298                                 ret = (isdn_net_xmit(ndev, skb));
1299                                 if(ret) netif_stop_queue(ndev);
1300                                 return ret;
1301                         } else
1302                                 netif_stop_queue(ndev);
1303                 }
1304         }
1305         return NETDEV_TX_BUSY;
1306 }
1307
1308 /*
1309  * Shutdown a net-interface.
1310  */
1311 static int
1312 isdn_net_close(struct net_device *dev)
1313 {
1314         struct net_device *p;
1315 #ifdef CONFIG_ISDN_X25
1316         struct concap_proto * cprot =
1317                 ((isdn_net_local *) netdev_priv(dev))->netdev->cprot;
1318         /* printk(KERN_DEBUG "isdn_net_close %s\n" , dev-> name ); */
1319 #endif
1320
1321 #ifdef CONFIG_ISDN_X25
1322         if( cprot && cprot -> pops ) cprot -> pops -> close( cprot );
1323 #endif
1324         netif_stop_queue(dev);
1325         p = MASTER_TO_SLAVE(dev);
1326         if (p) {
1327                 /* If this interface has slaves, stop them also */
1328                 while (p) {
1329 #ifdef CONFIG_ISDN_X25
1330                         cprot = ((isdn_net_local *) netdev_priv(p))
1331                                 -> netdev -> cprot;
1332                         if( cprot && cprot -> pops )
1333                                 cprot -> pops -> close( cprot );
1334 #endif
1335                         isdn_net_hangup(p);
1336                         p = MASTER_TO_SLAVE(p);
1337                 }
1338         }
1339         isdn_net_hangup(dev);
1340         isdn_unlock_drivers();
1341         return 0;
1342 }
1343
1344 /*
1345  * Get statistics
1346  */
1347 static struct net_device_stats *
1348 isdn_net_get_stats(struct net_device *dev)
1349 {
1350         isdn_net_local *lp = netdev_priv(dev);
1351         return &lp->stats;
1352 }
1353
1354 /*      This is simply a copy from std. eth.c EXCEPT we pull ETH_HLEN
1355  *      instead of dev->hard_header_len off. This is done because the
1356  *      lowlevel-driver has already pulled off its stuff when we get
1357  *      here and this routine only gets called with p_encap == ETHER.
1358  *      Determine the packet's protocol ID. The rule here is that we
1359  *      assume 802.3 if the type field is short enough to be a length.
1360  *      This is normal practice and works for any 'now in use' protocol.
1361  */
1362
1363 static __be16
1364 isdn_net_type_trans(struct sk_buff *skb, struct net_device *dev)
1365 {
1366         struct ethhdr *eth;
1367         unsigned char *rawp;
1368
1369         skb_reset_mac_header(skb);
1370         skb_pull(skb, ETH_HLEN);
1371         eth = eth_hdr(skb);
1372
1373         if (*eth->h_dest & 1) {
1374                 if (memcmp(eth->h_dest, dev->broadcast, ETH_ALEN) == 0)
1375                         skb->pkt_type = PACKET_BROADCAST;
1376                 else
1377                         skb->pkt_type = PACKET_MULTICAST;
1378         }
1379         /*
1380          *      This ALLMULTI check should be redundant by 1.4
1381          *      so don't forget to remove it.
1382          */
1383
1384         else if (dev->flags & (IFF_PROMISC /*| IFF_ALLMULTI*/)) {
1385                 if (memcmp(eth->h_dest, dev->dev_addr, ETH_ALEN))
1386                         skb->pkt_type = PACKET_OTHERHOST;
1387         }
1388         if (ntohs(eth->h_proto) >= 1536)
1389                 return eth->h_proto;
1390
1391         rawp = skb->data;
1392
1393         /*
1394          *      This is a magic hack to spot IPX packets. Older Novell breaks
1395          *      the protocol design and runs IPX over 802.3 without an 802.2 LLC
1396          *      layer. We look for FFFF which isn't a used 802.2 SSAP/DSAP. This
1397          *      won't work for fault tolerant netware but does for the rest.
1398          */
1399         if (*(unsigned short *) rawp == 0xFFFF)
1400                 return htons(ETH_P_802_3);
1401         /*
1402          *      Real 802.2 LLC
1403          */
1404         return htons(ETH_P_802_2);
1405 }
1406
1407
1408 /*
1409  * CISCO HDLC keepalive specific stuff
1410  */
1411 static struct sk_buff*
1412 isdn_net_ciscohdlck_alloc_skb(isdn_net_local *lp, int len)
1413 {
1414         unsigned short hl = dev->drv[lp->isdn_device]->interface->hl_hdrlen;
1415         struct sk_buff *skb;
1416
1417         skb = alloc_skb(hl + len, GFP_ATOMIC);
1418         if (skb)
1419                 skb_reserve(skb, hl);
1420         else
1421                 printk("isdn out of mem at %s:%d!\n", __FILE__, __LINE__);
1422         return skb;
1423 }
1424
1425 /* cisco hdlck device private ioctls */
1426 static int
1427 isdn_ciscohdlck_dev_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd)
1428 {
1429         isdn_net_local *lp = netdev_priv(dev);
1430         unsigned long len = 0;
1431         unsigned long expires = 0;
1432         int tmp = 0;
1433         int period = lp->cisco_keepalive_period;
1434         s8 debserint = lp->cisco_debserint;
1435         int rc = 0;
1436
1437         if (lp->p_encap != ISDN_NET_ENCAP_CISCOHDLCK)
1438                 return -EINVAL;
1439
1440         switch (cmd) {
1441                 /* get/set keepalive period */
1442                 case SIOCGKEEPPERIOD:
1443                         len = (unsigned long)sizeof(lp->cisco_keepalive_period);
1444                         if (copy_to_user(ifr->ifr_data,
1445                                 &lp->cisco_keepalive_period, len))
1446                                 rc = -EFAULT;
1447                         break;
1448                 case SIOCSKEEPPERIOD:
1449                         tmp = lp->cisco_keepalive_period;
1450                         len = (unsigned long)sizeof(lp->cisco_keepalive_period);
1451                         if (copy_from_user(&period, ifr->ifr_data, len))
1452                                 rc = -EFAULT;
1453                         if ((period > 0) && (period <= 32767))
1454                                 lp->cisco_keepalive_period = period;
1455                         else
1456                                 rc = -EINVAL;
1457                         if (!rc && (tmp != lp->cisco_keepalive_period)) {
1458                                 expires = (unsigned long)(jiffies +
1459                                         lp->cisco_keepalive_period * HZ);
1460                                 mod_timer(&lp->cisco_timer, expires);
1461                                 printk(KERN_INFO "%s: Keepalive period set "
1462                                         "to %d seconds.\n",
1463                                         dev->name, lp->cisco_keepalive_period);
1464                         }
1465                         break;
1466
1467                 /* get/set debugging */
1468                 case SIOCGDEBSERINT:
1469                         len = (unsigned long)sizeof(lp->cisco_debserint);
1470                         if (copy_to_user(ifr->ifr_data,
1471                                 &lp->cisco_debserint, len))
1472                                 rc = -EFAULT;
1473                         break;
1474                 case SIOCSDEBSERINT:
1475                         len = (unsigned long)sizeof(lp->cisco_debserint);
1476                         if (copy_from_user(&debserint,
1477                                 ifr->ifr_data, len))
1478                                 rc = -EFAULT;
1479                         if ((debserint >= 0) && (debserint <= 64))
1480                                 lp->cisco_debserint = debserint;
1481                         else
1482                                 rc = -EINVAL;
1483                         break;
1484
1485                 default:
1486                         rc = -EINVAL;
1487                         break;
1488         }
1489         return (rc);
1490 }
1491
1492
1493 static int isdn_net_ioctl(struct net_device *dev,
1494                           struct ifreq *ifr, int cmd)
1495 {
1496         isdn_net_local *lp = netdev_priv(dev);
1497
1498         switch (lp->p_encap) {
1499 #ifdef CONFIG_ISDN_PPP
1500         case ISDN_NET_ENCAP_SYNCPPP:
1501                 return isdn_ppp_dev_ioctl(dev, ifr, cmd);
1502 #endif
1503         case ISDN_NET_ENCAP_CISCOHDLCK:
1504                 return isdn_ciscohdlck_dev_ioctl(dev, ifr, cmd);
1505         default:
1506                 return -EINVAL;
1507         }
1508 }
1509
1510 /* called via cisco_timer.function */
1511 static void
1512 isdn_net_ciscohdlck_slarp_send_keepalive(unsigned long data)
1513 {
1514         isdn_net_local *lp = (isdn_net_local *) data;
1515         struct sk_buff *skb;
1516         unsigned char *p;
1517         unsigned long last_cisco_myseq = lp->cisco_myseq;
1518         int myseq_diff = 0;
1519
1520         if (!(lp->flags & ISDN_NET_CONNECTED) || lp->dialstate) {
1521                 printk("isdn BUG at %s:%d!\n", __FILE__, __LINE__);
1522                 return;
1523         }
1524         lp->cisco_myseq++;
1525
1526         myseq_diff = (lp->cisco_myseq - lp->cisco_mineseen);
1527         if ((lp->cisco_line_state) && ((myseq_diff >= 3)||(myseq_diff <= -3))) {
1528                 /* line up -> down */
1529                 lp->cisco_line_state = 0;
1530                 printk (KERN_WARNING
1531                                 "UPDOWN: Line protocol on Interface %s,"
1532                                 " changed state to down\n", lp->netdev->dev->name);
1533                 /* should stop routing higher-level data across */
1534         } else if ((!lp->cisco_line_state) &&
1535                 (myseq_diff >= 0) && (myseq_diff <= 2)) {
1536                 /* line down -> up */
1537                 lp->cisco_line_state = 1;
1538                 printk (KERN_WARNING
1539                                 "UPDOWN: Line protocol on Interface %s,"
1540                                 " changed state to up\n", lp->netdev->dev->name);
1541                 /* restart routing higher-level data across */
1542         }
1543
1544         if (lp->cisco_debserint)
1545                 printk (KERN_DEBUG "%s: HDLC "
1546                         "myseq %lu, mineseen %lu%c, yourseen %lu, %s\n",
1547                         lp->netdev->dev->name, last_cisco_myseq, lp->cisco_mineseen,
1548                         ((last_cisco_myseq == lp->cisco_mineseen) ? '*' : 040),
1549                         lp->cisco_yourseq,
1550                         ((lp->cisco_line_state) ? "line up" : "line down"));
1551
1552         skb = isdn_net_ciscohdlck_alloc_skb(lp, 4 + 14);
1553         if (!skb)
1554                 return;
1555
1556         p = skb_put(skb, 4 + 14);
1557
1558         /* cisco header */
1559         *(u8 *)(p + 0) = CISCO_ADDR_UNICAST;
1560         *(u8 *)(p + 1) = CISCO_CTRL;
1561         *(__be16 *)(p + 2) = cpu_to_be16(CISCO_TYPE_SLARP);
1562
1563         /* slarp keepalive */
1564         *(__be32 *)(p +  4) = cpu_to_be32(CISCO_SLARP_KEEPALIVE);
1565         *(__be32 *)(p +  8) = cpu_to_be32(lp->cisco_myseq);
1566         *(__be32 *)(p + 12) = cpu_to_be32(lp->cisco_yourseq);
1567         *(__be16 *)(p + 16) = cpu_to_be16(0xffff); // reliability, always 0xffff
1568         p += 18;
1569
1570         isdn_net_write_super(lp, skb);
1571
1572         lp->cisco_timer.expires = jiffies + lp->cisco_keepalive_period * HZ;
1573
1574         add_timer(&lp->cisco_timer);
1575 }
1576
1577 static void
1578 isdn_net_ciscohdlck_slarp_send_request(isdn_net_local *lp)
1579 {
1580         struct sk_buff *skb;
1581         unsigned char *p;
1582
1583         skb = isdn_net_ciscohdlck_alloc_skb(lp, 4 + 14);
1584         if (!skb)
1585                 return;
1586
1587         p = skb_put(skb, 4 + 14);
1588
1589         /* cisco header */
1590         *(u8 *)(p + 0) = CISCO_ADDR_UNICAST;
1591         *(u8 *)(p + 1) = CISCO_CTRL;
1592         *(__be16 *)(p + 2) = cpu_to_be16(CISCO_TYPE_SLARP);
1593
1594         /* slarp request */
1595         *(__be32 *)(p +  4) = cpu_to_be32(CISCO_SLARP_REQUEST);
1596         *(__be32 *)(p +  8) = cpu_to_be32(0); // address
1597         *(__be32 *)(p + 12) = cpu_to_be32(0); // netmask
1598         *(__be16 *)(p + 16) = cpu_to_be16(0); // unused
1599         p += 18;
1600
1601         isdn_net_write_super(lp, skb);
1602 }
1603
1604 static void
1605 isdn_net_ciscohdlck_connected(isdn_net_local *lp)
1606 {
1607         lp->cisco_myseq = 0;
1608         lp->cisco_mineseen = 0;
1609         lp->cisco_yourseq = 0;
1610         lp->cisco_keepalive_period = ISDN_TIMER_KEEPINT;
1611         lp->cisco_last_slarp_in = 0;
1612         lp->cisco_line_state = 0;
1613         lp->cisco_debserint = 0;
1614
1615         /* send slarp request because interface/seq.no.s reset */
1616         isdn_net_ciscohdlck_slarp_send_request(lp);
1617
1618         init_timer(&lp->cisco_timer);
1619         lp->cisco_timer.data = (unsigned long) lp;
1620         lp->cisco_timer.function = isdn_net_ciscohdlck_slarp_send_keepalive;
1621         lp->cisco_timer.expires = jiffies + lp->cisco_keepalive_period * HZ;
1622         add_timer(&lp->cisco_timer);
1623 }
1624
1625 static void
1626 isdn_net_ciscohdlck_disconnected(isdn_net_local *lp)
1627 {
1628         del_timer(&lp->cisco_timer);
1629 }
1630
1631 static void
1632 isdn_net_ciscohdlck_slarp_send_reply(isdn_net_local *lp)
1633 {
1634         struct sk_buff *skb;
1635         unsigned char *p;
1636         struct in_device *in_dev = NULL;
1637         __be32 addr = 0;                /* local ipv4 address */
1638         __be32 mask = 0;                /* local netmask */
1639
1640         if ((in_dev = lp->netdev->dev->ip_ptr) != NULL) {
1641                 /* take primary(first) address of interface */
1642                 struct in_ifaddr *ifa = in_dev->ifa_list;
1643                 if (ifa != NULL) {
1644                         addr = ifa->ifa_local;
1645                         mask = ifa->ifa_mask;
1646                 }
1647         }
1648
1649         skb = isdn_net_ciscohdlck_alloc_skb(lp, 4 + 14);
1650         if (!skb)
1651                 return;
1652
1653         p = skb_put(skb, 4 + 14);
1654
1655         /* cisco header */
1656         *(u8 *)(p + 0) = CISCO_ADDR_UNICAST;
1657         *(u8 *)(p + 1) = CISCO_CTRL;
1658         *(__be16 *)(p + 2) = cpu_to_be16(CISCO_TYPE_SLARP);
1659
1660         /* slarp reply, send own ip/netmask; if values are nonsense remote
1661          * should think we are unable to provide it with an address via SLARP */
1662         *(__be32 *)(p +  4) = cpu_to_be32(CISCO_SLARP_REPLY);
1663         *(__be32 *)(p +  8) = addr; // address
1664         *(__be32 *)(p + 12) = mask; // netmask
1665         *(__be16 *)(p + 16) = cpu_to_be16(0); // unused
1666         p += 18;
1667
1668         isdn_net_write_super(lp, skb);
1669 }
1670
1671 static void
1672 isdn_net_ciscohdlck_slarp_in(isdn_net_local *lp, struct sk_buff *skb)
1673 {
1674         unsigned char *p;
1675         int period;
1676         u32 code;
1677         u32 my_seq;
1678         u32 your_seq;
1679         __be32 local;
1680         __be32 *addr, *mask;
1681
1682         if (skb->len < 14)
1683                 return;
1684
1685         p = skb->data;
1686         code = be32_to_cpup((__be32 *)p);
1687         p += 4;
1688
1689         switch (code) {
1690         case CISCO_SLARP_REQUEST:
1691                 lp->cisco_yourseq = 0;
1692                 isdn_net_ciscohdlck_slarp_send_reply(lp);
1693                 break;
1694         case CISCO_SLARP_REPLY:
1695                 addr = (__be32 *)p;
1696                 mask = (__be32 *)(p + 4);
1697                 if (*mask != cpu_to_be32(0xfffffffc))
1698                         goto slarp_reply_out;
1699                 if ((*addr & cpu_to_be32(3)) == cpu_to_be32(0) ||
1700                     (*addr & cpu_to_be32(3)) == cpu_to_be32(3))
1701                         goto slarp_reply_out;
1702                 local = *addr ^ cpu_to_be32(3);
1703                 printk(KERN_INFO "%s: got slarp reply: remote ip: %pI4, local ip: %pI4 mask: %pI4\n",
1704                        lp->netdev->dev->name, addr, &local, mask);
1705                 break;
1706   slarp_reply_out:
1707                 printk(KERN_INFO "%s: got invalid slarp reply (%pI4/%pI4) - ignored\n",
1708                        lp->netdev->dev->name, addr, mask);
1709                 break;
1710         case CISCO_SLARP_KEEPALIVE:
1711                 period = (int)((jiffies - lp->cisco_last_slarp_in
1712                                 + HZ/2 - 1) / HZ);
1713                 if (lp->cisco_debserint &&
1714                                 (period != lp->cisco_keepalive_period) &&
1715                                 lp->cisco_last_slarp_in) {
1716                         printk(KERN_DEBUG "%s: Keepalive period mismatch - "
1717                                 "is %d but should be %d.\n",
1718                                 lp->netdev->dev->name, period,
1719                                 lp->cisco_keepalive_period);
1720                 }
1721                 lp->cisco_last_slarp_in = jiffies;
1722                 my_seq = be32_to_cpup((__be32 *)(p + 0));
1723                 your_seq = be32_to_cpup((__be32 *)(p + 4));
1724                 p += 10;
1725                 lp->cisco_yourseq = my_seq;
1726                 lp->cisco_mineseen = your_seq;
1727                 break;
1728         }
1729 }
1730
1731 static void
1732 isdn_net_ciscohdlck_receive(isdn_net_local *lp, struct sk_buff *skb)
1733 {
1734         unsigned char *p;
1735         u8 addr;
1736         u8 ctrl;
1737         u16 type;
1738
1739         if (skb->len < 4)
1740                 goto out_free;
1741
1742         p = skb->data;
1743         addr = *(u8 *)(p + 0);
1744         ctrl = *(u8 *)(p + 1);
1745         type = be16_to_cpup((__be16 *)(p + 2));
1746         p += 4;
1747         skb_pull(skb, 4);
1748
1749         if (addr != CISCO_ADDR_UNICAST && addr != CISCO_ADDR_BROADCAST) {
1750                 printk(KERN_WARNING "%s: Unknown Cisco addr 0x%02x\n",
1751                        lp->netdev->dev->name, addr);
1752                 goto out_free;
1753         }
1754         if (ctrl != CISCO_CTRL) {
1755                 printk(KERN_WARNING "%s: Unknown Cisco ctrl 0x%02x\n",
1756                        lp->netdev->dev->name, ctrl);
1757                 goto out_free;
1758         }
1759
1760         switch (type) {
1761         case CISCO_TYPE_SLARP:
1762                 isdn_net_ciscohdlck_slarp_in(lp, skb);
1763                 goto out_free;
1764         case CISCO_TYPE_CDP:
1765                 if (lp->cisco_debserint)
1766                         printk(KERN_DEBUG "%s: Received CDP packet. use "
1767                                 "\"no cdp enable\" on cisco.\n",
1768                                 lp->netdev->dev->name);
1769                 goto out_free;
1770         default:
1771                 /* no special cisco protocol */
1772                 skb->protocol = htons(type);
1773                 netif_rx(skb);
1774                 return;
1775         }
1776
1777  out_free:
1778         kfree_skb(skb);
1779 }
1780
1781 /*
1782  * Got a packet from ISDN-Channel.
1783  */
1784 static void
1785 isdn_net_receive(struct net_device *ndev, struct sk_buff *skb)
1786 {
1787         isdn_net_local *lp = netdev_priv(ndev);
1788         isdn_net_local *olp = lp;       /* original 'lp' */
1789 #ifdef CONFIG_ISDN_X25
1790         struct concap_proto *cprot = lp -> netdev -> cprot;
1791 #endif
1792         lp->transcount += skb->len;
1793
1794         lp->stats.rx_packets++;
1795         lp->stats.rx_bytes += skb->len;
1796         if (lp->master) {
1797                 /* Bundling: If device is a slave-device, deliver to master, also
1798                  * handle master's statistics and hangup-timeout
1799                  */
1800                 ndev = lp->master;
1801                 lp = netdev_priv(ndev);
1802                 lp->stats.rx_packets++;
1803                 lp->stats.rx_bytes += skb->len;
1804         }
1805         skb->dev = ndev;
1806         skb->pkt_type = PACKET_HOST;
1807         skb_reset_mac_header(skb);
1808 #ifdef ISDN_DEBUG_NET_DUMP
1809         isdn_dumppkt("R:", skb->data, skb->len, 40);
1810 #endif
1811         switch (lp->p_encap) {
1812                 case ISDN_NET_ENCAP_ETHER:
1813                         /* Ethernet over ISDN */
1814                         olp->huptimer = 0;
1815                         lp->huptimer = 0;
1816                         skb->protocol = isdn_net_type_trans(skb, ndev);
1817                         break;
1818                 case ISDN_NET_ENCAP_UIHDLC:
1819                         /* HDLC with UI-frame (for ispa with -h1 option) */
1820                         olp->huptimer = 0;
1821                         lp->huptimer = 0;
1822                         skb_pull(skb, 2);
1823                         /* Fall through */
1824                 case ISDN_NET_ENCAP_RAWIP:
1825                         /* RAW-IP without MAC-Header */
1826                         olp->huptimer = 0;
1827                         lp->huptimer = 0;
1828                         skb->protocol = htons(ETH_P_IP);
1829                         break;
1830                 case ISDN_NET_ENCAP_CISCOHDLCK:
1831                         isdn_net_ciscohdlck_receive(lp, skb);
1832                         return;
1833                 case ISDN_NET_ENCAP_CISCOHDLC:
1834                         /* CISCO-HDLC IP with type field and  fake I-frame-header */
1835                         skb_pull(skb, 2);
1836                         /* Fall through */
1837                 case ISDN_NET_ENCAP_IPTYP:
1838                         /* IP with type field */
1839                         olp->huptimer = 0;
1840                         lp->huptimer = 0;
1841                         skb->protocol = *(__be16 *)&(skb->data[0]);
1842                         skb_pull(skb, 2);
1843                         if (*(unsigned short *) skb->data == 0xFFFF)
1844                                 skb->protocol = htons(ETH_P_802_3);
1845                         break;
1846 #ifdef CONFIG_ISDN_PPP
1847                 case ISDN_NET_ENCAP_SYNCPPP:
1848                         /* huptimer is done in isdn_ppp_push_higher */
1849                         isdn_ppp_receive(lp->netdev, olp, skb);
1850                         return;
1851 #endif
1852
1853                 default:
1854 #ifdef CONFIG_ISDN_X25
1855                   /* try if there are generic sync_device receiver routines */
1856                         if(cprot) if(cprot -> pops)
1857                                 if( cprot -> pops -> data_ind){
1858                                         cprot -> pops -> data_ind(cprot,skb);
1859                                         return;
1860                                 };
1861 #endif /* CONFIG_ISDN_X25 */
1862                         printk(KERN_WARNING "%s: unknown encapsulation, dropping\n",
1863                                lp->netdev->dev->name);
1864                         kfree_skb(skb);
1865                         return;
1866         }
1867
1868         netif_rx(skb);
1869         return;
1870 }
1871
1872 /*
1873  * A packet arrived via ISDN. Search interface-chain for a corresponding
1874  * interface. If found, deliver packet to receiver-function and return 1,
1875  * else return 0.
1876  */
1877 int
1878 isdn_net_rcv_skb(int idx, struct sk_buff *skb)
1879 {
1880         isdn_net_dev *p = dev->rx_netdev[idx];
1881
1882         if (p) {
1883                 isdn_net_local *lp = p->local;
1884                 if ((lp->flags & ISDN_NET_CONNECTED) &&
1885                     (!lp->dialstate)) {
1886                         isdn_net_receive(p->dev, skb);
1887                         return 1;
1888                 }
1889         }
1890         return 0;
1891 }
1892
1893 /*
1894  *  build an header
1895  *  depends on encaps that is being used.
1896  */
1897
1898 static int isdn_net_header(struct sk_buff *skb, struct net_device *dev,
1899                            unsigned short type,
1900                            const void *daddr, const void *saddr, unsigned plen)
1901 {
1902         isdn_net_local *lp = netdev_priv(dev);
1903         unsigned char *p;
1904         ushort len = 0;
1905
1906         switch (lp->p_encap) {
1907                 case ISDN_NET_ENCAP_ETHER:
1908                         len = eth_header(skb, dev, type, daddr, saddr, plen);
1909                         break;
1910 #ifdef CONFIG_ISDN_PPP
1911                 case ISDN_NET_ENCAP_SYNCPPP:
1912                         /* stick on a fake header to keep fragmentation code happy. */
1913                         len = IPPP_MAX_HEADER;
1914                         skb_push(skb,len);
1915                         break;
1916 #endif
1917                 case ISDN_NET_ENCAP_RAWIP:
1918                         printk(KERN_WARNING "isdn_net_header called with RAW_IP!\n");
1919                         len = 0;
1920                         break;
1921                 case ISDN_NET_ENCAP_IPTYP:
1922                         /* ethernet type field */
1923                         *((__be16 *)skb_push(skb, 2)) = htons(type);
1924                         len = 2;
1925                         break;
1926                 case ISDN_NET_ENCAP_UIHDLC:
1927                         /* HDLC with UI-Frames (for ispa with -h1 option) */
1928                         *((__be16 *)skb_push(skb, 2)) = htons(0x0103);
1929                         len = 2;
1930                         break;
1931                 case ISDN_NET_ENCAP_CISCOHDLC:
1932                 case ISDN_NET_ENCAP_CISCOHDLCK:
1933                         p = skb_push(skb, 4);
1934                         *(u8 *)(p + 0) = CISCO_ADDR_UNICAST;
1935                         *(u8 *)(p + 1) = CISCO_CTRL;
1936                         *(__be16 *)(p + 2) = cpu_to_be16(type);
1937                         p += 4;
1938                         len = 4;
1939                         break;
1940 #ifdef CONFIG_ISDN_X25
1941                 default:
1942                   /* try if there are generic concap protocol routines */
1943                         if( lp-> netdev -> cprot ){
1944                                 printk(KERN_WARNING "isdn_net_header called with concap_proto!\n");
1945                                 len = 0;
1946                                 break;
1947                         }
1948                         break;
1949 #endif /* CONFIG_ISDN_X25 */
1950         }
1951         return len;
1952 }
1953
1954 /* We don't need to send arp, because we have point-to-point connections. */
1955 static int
1956 isdn_net_rebuild_header(struct sk_buff *skb)
1957 {
1958         struct net_device *dev = skb->dev;
1959         isdn_net_local *lp = netdev_priv(dev);
1960         int ret = 0;
1961
1962         if (lp->p_encap == ISDN_NET_ENCAP_ETHER) {
1963                 struct ethhdr *eth = (struct ethhdr *) skb->data;
1964
1965                 /*
1966                  *      Only ARP/IP is currently supported
1967                  */
1968
1969                 if (eth->h_proto != htons(ETH_P_IP)) {
1970                         printk(KERN_WARNING
1971                                "isdn_net: %s don't know how to resolve type %d addresses?\n",
1972                                dev->name, (int) eth->h_proto);
1973                         memcpy(eth->h_source, dev->dev_addr, dev->addr_len);
1974                         return 0;
1975                 }
1976                 /*
1977                  *      Try to get ARP to resolve the header.
1978                  */
1979 #ifdef CONFIG_INET
1980                 ret = arp_find(eth->h_dest, skb);
1981 #endif
1982         }
1983         return ret;
1984 }
1985
1986 static int isdn_header_cache(const struct neighbour *neigh, struct hh_cache *hh)
1987 {
1988         const struct net_device *dev = neigh->dev;
1989         isdn_net_local *lp = netdev_priv(dev);
1990
1991         if (lp->p_encap == ISDN_NET_ENCAP_ETHER)
1992                 return eth_header_cache(neigh, hh);
1993         return -1;
1994 }
1995
1996 static void isdn_header_cache_update(struct hh_cache *hh,
1997                                      const struct net_device *dev,
1998                                      const unsigned char *haddr)
1999 {
2000         isdn_net_local *lp = netdev_priv(dev);
2001         if (lp->p_encap == ISDN_NET_ENCAP_ETHER)
2002                 eth_header_cache_update(hh, dev, haddr);
2003 }
2004
2005 static const struct header_ops isdn_header_ops = {
2006         .create = isdn_net_header,
2007         .rebuild = isdn_net_rebuild_header,
2008         .cache = isdn_header_cache,
2009         .cache_update = isdn_header_cache_update,
2010 };
2011
2012 /*
2013  * Interface-setup. (just after registering a new interface)
2014  */
2015 static int
2016 isdn_net_init(struct net_device *ndev)
2017 {
2018         ushort max_hlhdr_len = 0;
2019         int drvidx;
2020
2021         /*
2022          *  up till binding we ask the protocol layer to reserve as much
2023          *  as we might need for HL layer
2024          */
2025
2026         for (drvidx = 0; drvidx < ISDN_MAX_DRIVERS; drvidx++)
2027                 if (dev->drv[drvidx])
2028                         if (max_hlhdr_len < dev->drv[drvidx]->interface->hl_hdrlen)
2029                                 max_hlhdr_len = dev->drv[drvidx]->interface->hl_hdrlen;
2030
2031         ndev->hard_header_len = ETH_HLEN + max_hlhdr_len;
2032         return 0;
2033 }
2034
2035 static void
2036 isdn_net_swapbind(int drvidx)
2037 {
2038         isdn_net_dev *p;
2039
2040 #ifdef ISDN_DEBUG_NET_ICALL
2041         printk(KERN_DEBUG "n_fi: swapping ch of %d\n", drvidx);
2042 #endif
2043         p = dev->netdev;
2044         while (p) {
2045                 if (p->local->pre_device == drvidx)
2046                         switch (p->local->pre_channel) {
2047                                 case 0:
2048                                         p->local->pre_channel = 1;
2049                                         break;
2050                                 case 1:
2051                                         p->local->pre_channel = 0;
2052                                         break;
2053                         }
2054                 p = (isdn_net_dev *) p->next;
2055         }
2056 }
2057
2058 static void
2059 isdn_net_swap_usage(int i1, int i2)
2060 {
2061         int u1 = dev->usage[i1] & ISDN_USAGE_EXCLUSIVE;
2062         int u2 = dev->usage[i2] & ISDN_USAGE_EXCLUSIVE;
2063
2064 #ifdef ISDN_DEBUG_NET_ICALL
2065         printk(KERN_DEBUG "n_fi: usage of %d and %d\n", i1, i2);
2066 #endif
2067         dev->usage[i1] &= ~ISDN_USAGE_EXCLUSIVE;
2068         dev->usage[i1] |= u2;
2069         dev->usage[i2] &= ~ISDN_USAGE_EXCLUSIVE;
2070         dev->usage[i2] |= u1;
2071         isdn_info_update();
2072 }
2073
2074 /*
2075  * An incoming call-request has arrived.
2076  * Search the interface-chain for an appropriate interface.
2077  * If found, connect the interface to the ISDN-channel and initiate
2078  * D- and B-Channel-setup. If secure-flag is set, accept only
2079  * configured phone-numbers. If callback-flag is set, initiate
2080  * callback-dialing.
2081  *
2082  * Return-Value: 0 = No appropriate interface for this call.
2083  *               1 = Call accepted
2084  *               2 = Reject call, wait cbdelay, then call back
2085  *               3 = Reject call
2086  *               4 = Wait cbdelay, then call back
2087  *               5 = No appropriate interface for this call,
2088  *                   would eventually match if CID was longer.
2089  */
2090
2091 int
2092 isdn_net_find_icall(int di, int ch, int idx, setup_parm *setup)
2093 {
2094         char *eaz;
2095         int si1;
2096         int si2;
2097         int ematch;
2098         int wret;
2099         int swapped;
2100         int sidx = 0;
2101         u_long flags;
2102         isdn_net_dev *p;
2103         isdn_net_phone *n;
2104         char nr[ISDN_MSNLEN];
2105         char *my_eaz;
2106
2107         /* Search name in netdev-chain */
2108         if (!setup->phone[0]) {
2109                 nr[0] = '0';
2110                 nr[1] = '\0';
2111                 printk(KERN_INFO "isdn_net: Incoming call without OAD, assuming '0'\n");
2112         } else
2113                 strlcpy(nr, setup->phone, ISDN_MSNLEN);
2114         si1 = (int) setup->si1;
2115         si2 = (int) setup->si2;
2116         if (!setup->eazmsn[0]) {
2117                 printk(KERN_WARNING "isdn_net: Incoming call without CPN, assuming '0'\n");
2118                 eaz = "0";
2119         } else
2120                 eaz = setup->eazmsn;
2121         if (dev->net_verbose > 1)
2122                 printk(KERN_INFO "isdn_net: call from %s,%d,%d -> %s\n", nr, si1, si2, eaz);
2123         /* Accept DATA and VOICE calls at this stage
2124          * local eaz is checked later for allowed call types
2125          */
2126         if ((si1 != 7) && (si1 != 1)) {
2127                 if (dev->net_verbose > 1)
2128                         printk(KERN_INFO "isdn_net: Service-Indicator not 1 or 7, ignored\n");
2129                 return 0;
2130         }
2131         n = (isdn_net_phone *) 0;
2132         p = dev->netdev;
2133         ematch = wret = swapped = 0;
2134 #ifdef ISDN_DEBUG_NET_ICALL
2135         printk(KERN_DEBUG "n_fi: di=%d ch=%d idx=%d usg=%d\n", di, ch, idx,
2136                 dev->usage[idx]);
2137 #endif
2138         while (p) {
2139                 int matchret;
2140                 isdn_net_local *lp = p->local;
2141
2142                 /* If last check has triggered as binding-swap, revert it */
2143                 switch (swapped) {
2144                         case 2:
2145                                 isdn_net_swap_usage(idx, sidx);
2146                                 /* fall through */
2147                         case 1:
2148                                 isdn_net_swapbind(di);
2149                                 break;
2150                 }
2151                 swapped = 0;
2152                 /* check acceptable call types for DOV */
2153                 my_eaz = isdn_map_eaz2msn(lp->msn, di);
2154                 if (si1 == 1) { /* it's a DOV call, check if we allow it */
2155                         if (*my_eaz == 'v' || *my_eaz == 'V' ||
2156                             *my_eaz == 'b' || *my_eaz == 'B')
2157                                 my_eaz++; /* skip to allow a match */
2158                         else
2159                                 my_eaz = NULL; /* force non match */
2160                 } else { /* it's a DATA call, check if we allow it */
2161                         if (*my_eaz == 'b' || *my_eaz == 'B')
2162                                 my_eaz++; /* skip to allow a match */
2163                 }
2164                 if (my_eaz)
2165                         matchret = isdn_msncmp(eaz, my_eaz);
2166                 else
2167                         matchret = 1;
2168                 if (!matchret)
2169                         ematch = 1;
2170
2171                 /* Remember if more numbers eventually can match */
2172                 if (matchret > wret)
2173                         wret = matchret;
2174 #ifdef ISDN_DEBUG_NET_ICALL
2175                 printk(KERN_DEBUG "n_fi: if='%s', l.msn=%s, l.flags=%d, l.dstate=%d\n",
2176                        p->dev->name, lp->msn, lp->flags, lp->dialstate);
2177 #endif
2178                 if ((!matchret) &&                                        /* EAZ is matching   */
2179                     (((!(lp->flags & ISDN_NET_CONNECTED)) &&              /* but not connected */
2180                       (USG_NONE(dev->usage[idx]))) ||                     /* and ch. unused or */
2181                      ((((lp->dialstate == 4) || (lp->dialstate == 12)) && /* if dialing        */
2182                        (!(lp->flags & ISDN_NET_CALLBACK)))                /* but no callback   */
2183                      )))
2184                          {
2185 #ifdef ISDN_DEBUG_NET_ICALL
2186                         printk(KERN_DEBUG "n_fi: match1, pdev=%d pch=%d\n",
2187                                lp->pre_device, lp->pre_channel);
2188 #endif
2189                         if (dev->usage[idx] & ISDN_USAGE_EXCLUSIVE) {
2190                                 if ((lp->pre_channel != ch) ||
2191                                     (lp->pre_device != di)) {
2192                                         /* Here we got a problem:
2193                                          * If using an ICN-Card, an incoming call is always signaled on
2194                                          * on the first channel of the card, if both channels are
2195                                          * down. However this channel may be bound exclusive. If the
2196                                          * second channel is free, this call should be accepted.
2197                                          * The solution is horribly but it runs, so what:
2198                                          * We exchange the exclusive bindings of the two channels, the
2199                                          * corresponding variables in the interface-structs.
2200                                          */
2201                                         if (ch == 0) {
2202                                                 sidx = isdn_dc2minor(di, 1);
2203 #ifdef ISDN_DEBUG_NET_ICALL
2204                                                 printk(KERN_DEBUG "n_fi: ch is 0\n");
2205 #endif
2206                                                 if (USG_NONE(dev->usage[sidx])) {
2207                                                         /* Second Channel is free, now see if it is bound
2208                                                          * exclusive too. */
2209                                                         if (dev->usage[sidx] & ISDN_USAGE_EXCLUSIVE) {
2210 #ifdef ISDN_DEBUG_NET_ICALL
2211                                                                 printk(KERN_DEBUG "n_fi: 2nd channel is down and bound\n");
2212 #endif
2213                                                                 /* Yes, swap bindings only, if the original
2214                                                                  * binding is bound to channel 1 of this driver */
2215                                                                 if ((lp->pre_device == di) &&
2216                                                                     (lp->pre_channel == 1)) {
2217                                                                         isdn_net_swapbind(di);
2218                                                                         swapped = 1;
2219                                                                 } else {
2220                                                                         /* ... else iterate next device */
2221                                                                         p = (isdn_net_dev *) p->next;
2222                                                                         continue;
2223                                                                 }
2224                                                         } else {
2225 #ifdef ISDN_DEBUG_NET_ICALL
2226                                                                 printk(KERN_DEBUG "n_fi: 2nd channel is down and unbound\n");
2227 #endif
2228                                                                 /* No, swap always and swap excl-usage also */
2229                                                                 isdn_net_swap_usage(idx, sidx);
2230                                                                 isdn_net_swapbind(di);
2231                                                                 swapped = 2;
2232                                                         }
2233                                                         /* Now check for exclusive binding again */
2234 #ifdef ISDN_DEBUG_NET_ICALL
2235                                                         printk(KERN_DEBUG "n_fi: final check\n");
2236 #endif
2237                                                         if ((dev->usage[idx] & ISDN_USAGE_EXCLUSIVE) &&
2238                                                             ((lp->pre_channel != ch) ||
2239                                                              (lp->pre_device != di))) {
2240 #ifdef ISDN_DEBUG_NET_ICALL
2241                                                                 printk(KERN_DEBUG "n_fi: final check failed\n");
2242 #endif
2243                                                                 p = (isdn_net_dev *) p->next;
2244                                                                 continue;
2245                                                         }
2246                                                 }
2247                                         } else {
2248                                                 /* We are already on the second channel, so nothing to do */
2249 #ifdef ISDN_DEBUG_NET_ICALL
2250                                                 printk(KERN_DEBUG "n_fi: already on 2nd channel\n");
2251 #endif
2252                                         }
2253                                 }
2254                         }
2255 #ifdef ISDN_DEBUG_NET_ICALL
2256                         printk(KERN_DEBUG "n_fi: match2\n");
2257 #endif
2258                         n = lp->phone[0];
2259                         if (lp->flags & ISDN_NET_SECURE) {
2260                                 while (n) {
2261                                         if (!isdn_msncmp(nr, n->num))
2262                                                 break;
2263                                         n = (isdn_net_phone *) n->next;
2264                                 }
2265                         }
2266                         if (n || (!(lp->flags & ISDN_NET_SECURE))) {
2267 #ifdef ISDN_DEBUG_NET_ICALL
2268                                 printk(KERN_DEBUG "n_fi: match3\n");
2269 #endif
2270                                 /* matching interface found */
2271
2272                                 /*
2273                                  * Is the state STOPPED?
2274                                  * If so, no dialin is allowed,
2275                                  * so reject actively.
2276                                  * */
2277                                 if (ISDN_NET_DIALMODE(*lp) == ISDN_NET_DM_OFF) {
2278                                         printk(KERN_INFO "incoming call, interface %s `stopped' -> rejected\n",
2279                                                p->dev->name);
2280                                         return 3;
2281                                 }
2282                                 /*
2283                                  * Is the interface up?
2284                                  * If not, reject the call actively.
2285                                  */
2286                                 if (!isdn_net_device_started(p)) {
2287                                         printk(KERN_INFO "%s: incoming call, interface down -> rejected\n",
2288                                                p->dev->name);
2289                                         return 3;
2290                                 }
2291                                 /* Interface is up, now see if it's a slave. If so, see if
2292                                  * it's master and parent slave is online. If not, reject the call.
2293                                  */
2294                                 if (lp->master) {
2295                                         isdn_net_local *mlp = ISDN_MASTER_PRIV(lp);
2296                                         printk(KERN_DEBUG "ICALLslv: %s\n", p->dev->name);
2297                                         printk(KERN_DEBUG "master=%s\n", lp->master->name);
2298                                         if (mlp->flags & ISDN_NET_CONNECTED) {
2299                                                 printk(KERN_DEBUG "master online\n");
2300                                                 /* Master is online, find parent-slave (master if first slave) */
2301                                                 while (mlp->slave) {
2302                                                         if (ISDN_SLAVE_PRIV(mlp) == lp)
2303                                                                 break;
2304                                                         mlp = ISDN_SLAVE_PRIV(mlp);
2305                                                 }
2306                                         } else
2307                                                 printk(KERN_DEBUG "master offline\n");
2308                                         /* Found parent, if it's offline iterate next device */
2309                                         printk(KERN_DEBUG "mlpf: %d\n", mlp->flags & ISDN_NET_CONNECTED);
2310                                         if (!(mlp->flags & ISDN_NET_CONNECTED)) {
2311                                                 p = (isdn_net_dev *) p->next;
2312                                                 continue;
2313                                         }
2314                                 }
2315                                 if (lp->flags & ISDN_NET_CALLBACK) {
2316                                         int chi;
2317                                         /*
2318                                          * Is the state MANUAL?
2319                                          * If so, no callback can be made,
2320                                          * so reject actively.
2321                                          * */
2322                                         if (ISDN_NET_DIALMODE(*lp) == ISDN_NET_DM_OFF) {
2323                                                 printk(KERN_INFO "incoming call for callback, interface %s `off' -> rejected\n",
2324                                                        p->dev->name);
2325                                                 return 3;
2326                                         }
2327                                         printk(KERN_DEBUG "%s: call from %s -> %s, start callback\n",
2328                                                p->dev->name, nr, eaz);
2329                                         if (lp->phone[1]) {
2330                                                 /* Grab a free ISDN-Channel */
2331                                                 spin_lock_irqsave(&dev->lock, flags);
2332                                                 if ((chi =
2333                                                         isdn_get_free_channel(
2334                                                                 ISDN_USAGE_NET,
2335                                                                 lp->l2_proto,
2336                                                                 lp->l3_proto,
2337                                                                 lp->pre_device,
2338                                                                 lp->pre_channel,
2339                                                                 lp->msn)
2340                                                                 ) < 0) {
2341
2342                                                         printk(KERN_WARNING "isdn_net_find_icall: No channel for %s\n",
2343                                                                 p->dev->name);
2344                                                         spin_unlock_irqrestore(&dev->lock, flags);
2345                                                         return 0;
2346                                                 }
2347                                                 /* Setup dialstate. */
2348                                                 lp->dtimer = 0;
2349                                                 lp->dialstate = 11;
2350                                                 /* Connect interface with channel */
2351                                                 isdn_net_bind_channel(lp, chi);
2352 #ifdef CONFIG_ISDN_PPP
2353                                                 if (lp->p_encap == ISDN_NET_ENCAP_SYNCPPP)
2354                                                         if (isdn_ppp_bind(lp) < 0) {
2355                                                                 spin_unlock_irqrestore(&dev->lock, flags);
2356                                                                 isdn_net_unbind_channel(lp);
2357                                                                 return 0;
2358                                                         }
2359 #endif
2360                                                 spin_unlock_irqrestore(&dev->lock, flags);
2361                                                 /* Initiate dialing by returning 2 or 4 */
2362                                                 return (lp->flags & ISDN_NET_CBHUP) ? 2 : 4;
2363                                         } else
2364                                                 printk(KERN_WARNING "isdn_net: %s: No phone number\n",
2365                                                         p->dev->name);
2366                                         return 0;
2367                                 } else {
2368                                         printk(KERN_DEBUG "%s: call from %s -> %s accepted\n",
2369                                                 p->dev->name, nr, eaz);
2370                                         /* if this interface is dialing, it does it probably on a different
2371                                            device, so free this device */
2372                                         if ((lp->dialstate == 4) || (lp->dialstate == 12)) {
2373 #ifdef CONFIG_ISDN_PPP
2374                                                 if (lp->p_encap == ISDN_NET_ENCAP_SYNCPPP)
2375                                                         isdn_ppp_free(lp);
2376 #endif
2377                                                 isdn_net_lp_disconnected(lp);
2378                                                 isdn_free_channel(lp->isdn_device, lp->isdn_channel,
2379                                                          ISDN_USAGE_NET);
2380                                         }
2381                                         spin_lock_irqsave(&dev->lock, flags);
2382                                         dev->usage[idx] &= ISDN_USAGE_EXCLUSIVE;
2383                                         dev->usage[idx] |= ISDN_USAGE_NET;
2384                                         strcpy(dev->num[idx], nr);
2385                                         isdn_info_update();
2386                                         dev->st_netdev[idx] = lp->netdev;
2387                                         lp->isdn_device = di;
2388                                         lp->isdn_channel = ch;
2389                                         lp->ppp_slot = -1;
2390                                         lp->flags |= ISDN_NET_CONNECTED;
2391                                         lp->dialstate = 7;
2392                                         lp->dtimer = 0;
2393                                         lp->outgoing = 0;
2394                                         lp->huptimer = 0;
2395                                         lp->hupflags |= ISDN_WAITCHARGE;
2396                                         lp->hupflags &= ~ISDN_HAVECHARGE;
2397 #ifdef CONFIG_ISDN_PPP
2398                                         if (lp->p_encap == ISDN_NET_ENCAP_SYNCPPP) {
2399                                                 if (isdn_ppp_bind(lp) < 0) {
2400                                                         isdn_net_unbind_channel(lp);
2401                                                         spin_unlock_irqrestore(&dev->lock, flags);
2402                                                         return 0;
2403                                                 }
2404                                         }
2405 #endif
2406                                         spin_unlock_irqrestore(&dev->lock, flags);
2407                                         return 1;
2408                                 }
2409                         }
2410                 }
2411                 p = (isdn_net_dev *) p->next;
2412         }
2413         /* If none of configured EAZ/MSN matched and not verbose, be silent */
2414         if (!ematch || dev->net_verbose)
2415                 printk(KERN_INFO "isdn_net: call from %s -> %d %s ignored\n", nr, di, eaz);
2416         return (wret == 2)?5:0;
2417 }
2418
2419 /*
2420  * Search list of net-interfaces for an interface with given name.
2421  */
2422 isdn_net_dev *
2423 isdn_net_findif(char *name)
2424 {
2425         isdn_net_dev *p = dev->netdev;
2426
2427         while (p) {
2428                 if (!strcmp(p->dev->name, name))
2429                         return p;
2430                 p = (isdn_net_dev *) p->next;
2431         }
2432         return (isdn_net_dev *) NULL;
2433 }
2434
2435 /*
2436  * Force a net-interface to dial out.
2437  * This is called from the userlevel-routine below or
2438  * from isdn_net_start_xmit().
2439  */
2440 static int
2441 isdn_net_force_dial_lp(isdn_net_local * lp)
2442 {
2443         if ((!(lp->flags & ISDN_NET_CONNECTED)) && !lp->dialstate) {
2444                 int chi;
2445                 if (lp->phone[1]) {
2446                         ulong flags;
2447
2448                         /* Grab a free ISDN-Channel */
2449                         spin_lock_irqsave(&dev->lock, flags);
2450                         if ((chi = isdn_get_free_channel(
2451                                         ISDN_USAGE_NET,
2452                                         lp->l2_proto,
2453                                         lp->l3_proto,
2454                                         lp->pre_device,
2455                                         lp->pre_channel,
2456                                         lp->msn)) < 0) {
2457                                 printk(KERN_WARNING "isdn_net_force_dial: No channel for %s\n",
2458                                         lp->netdev->dev->name);
2459                                 spin_unlock_irqrestore(&dev->lock, flags);
2460                                 return -EAGAIN;
2461                         }
2462                         lp->dialstate = 1;
2463                         /* Connect interface with channel */
2464                         isdn_net_bind_channel(lp, chi);
2465 #ifdef CONFIG_ISDN_PPP
2466                         if (lp->p_encap == ISDN_NET_ENCAP_SYNCPPP)
2467                                 if (isdn_ppp_bind(lp) < 0) {
2468                                         isdn_net_unbind_channel(lp);
2469                                         spin_unlock_irqrestore(&dev->lock, flags);
2470                                         return -EAGAIN;
2471                                 }
2472 #endif
2473                         /* Initiate dialing */
2474                         spin_unlock_irqrestore(&dev->lock, flags);
2475                         isdn_net_dial();
2476                         return 0;
2477                 } else
2478                         return -EINVAL;
2479         } else
2480                 return -EBUSY;
2481 }
2482
2483 /*
2484  * This is called from certain upper protocol layers (multilink ppp
2485  * and x25iface encapsulation module) that want to initiate dialing
2486  * themselves.
2487  */
2488 int
2489 isdn_net_dial_req(isdn_net_local * lp)
2490 {
2491         /* is there a better error code? */
2492         if (!(ISDN_NET_DIALMODE(*lp) == ISDN_NET_DM_AUTO)) return -EBUSY;
2493
2494         return isdn_net_force_dial_lp(lp);
2495 }
2496
2497 /*
2498  * Force a net-interface to dial out.
2499  * This is always called from within userspace (ISDN_IOCTL_NET_DIAL).
2500  */
2501 int
2502 isdn_net_force_dial(char *name)
2503 {
2504         isdn_net_dev *p = isdn_net_findif(name);
2505
2506         if (!p)
2507                 return -ENODEV;
2508         return (isdn_net_force_dial_lp(p->local));
2509 }
2510
2511 /* The ISDN-specific entries in the device structure. */
2512 static const struct net_device_ops isdn_netdev_ops = {
2513         .ndo_init             = isdn_net_init,
2514         .ndo_open             = isdn_net_open,
2515         .ndo_stop             = isdn_net_close,
2516         .ndo_do_ioctl         = isdn_net_ioctl,
2517
2518         .ndo_start_xmit       = isdn_net_start_xmit,
2519         .ndo_get_stats        = isdn_net_get_stats,
2520         .ndo_tx_timeout       = isdn_net_tx_timeout,
2521 };
2522
2523 /*
2524  * Helper for alloc_netdev()
2525  */
2526 static void _isdn_setup(struct net_device *dev)
2527 {
2528         isdn_net_local *lp = netdev_priv(dev);
2529
2530         ether_setup(dev);
2531
2532         /* Setup the generic properties */
2533         dev->flags = IFF_NOARP|IFF_POINTOPOINT;
2534         dev->header_ops = NULL;
2535         dev->netdev_ops = &isdn_netdev_ops;
2536
2537         /* for clients with MPPP maybe higher values better */
2538         dev->tx_queue_len = 30;
2539
2540         lp->p_encap = ISDN_NET_ENCAP_RAWIP;
2541         lp->magic = ISDN_NET_MAGIC;
2542         lp->last = lp;
2543         lp->next = lp;
2544         lp->isdn_device = -1;
2545         lp->isdn_channel = -1;
2546         lp->pre_device = -1;
2547         lp->pre_channel = -1;
2548         lp->exclusive = -1;
2549         lp->ppp_slot = -1;
2550         lp->pppbind = -1;
2551         skb_queue_head_init(&lp->super_tx_queue);
2552         lp->l2_proto = ISDN_PROTO_L2_X75I;
2553         lp->l3_proto = ISDN_PROTO_L3_TRANS;
2554         lp->triggercps = 6000;
2555         lp->slavedelay = 10 * HZ;
2556         lp->hupflags = ISDN_INHUP;      /* Do hangup even on incoming calls */
2557         lp->onhtime = 10;       /* Default hangup-time for saving costs */
2558         lp->dialmax = 1;
2559         /* Hangup before Callback, manual dial */
2560         lp->flags = ISDN_NET_CBHUP | ISDN_NET_DM_MANUAL;
2561         lp->cbdelay = 25;       /* Wait 5 secs before Callback */
2562         lp->dialtimeout = -1;  /* Infinite Dial-Timeout */
2563         lp->dialwait = 5 * HZ; /* Wait 5 sec. after failed dial */
2564         lp->dialstarted = 0;   /* Jiffies of last dial-start */
2565         lp->dialwait_timer = 0;  /* Jiffies of earliest next dial-start */
2566 }
2567
2568 /*
2569  * Allocate a new network-interface and initialize its data structures.
2570  */
2571 char *
2572 isdn_net_new(char *name, struct net_device *master)
2573 {
2574         isdn_net_dev *netdev;
2575
2576         /* Avoid creating an existing interface */
2577         if (isdn_net_findif(name)) {
2578                 printk(KERN_WARNING "isdn_net: interface %s already exists\n", name);
2579                 return NULL;
2580         }
2581         if (name == NULL)
2582                 return NULL;
2583         if (!(netdev = kzalloc(sizeof(isdn_net_dev), GFP_KERNEL))) {
2584                 printk(KERN_WARNING "isdn_net: Could not allocate net-device\n");
2585                 return NULL;
2586         }
2587         netdev->dev = alloc_netdev(sizeof(isdn_net_local), name, _isdn_setup);
2588         if (!netdev->dev) {
2589                 printk(KERN_WARNING "isdn_net: Could not allocate network device\n");
2590                 kfree(netdev);
2591                 return NULL;
2592         }
2593         netdev->local = netdev_priv(netdev->dev);
2594
2595         if (master) {
2596                 /* Device shall be a slave */
2597                 struct net_device *p = MASTER_TO_SLAVE(master);
2598                 struct net_device *q = master;
2599
2600                 netdev->local->master = master;
2601                 /* Put device at end of slave-chain */
2602                 while (p) {
2603                         q = p;
2604                         p = MASTER_TO_SLAVE(p);
2605                 }
2606                 MASTER_TO_SLAVE(q) = netdev->dev;
2607         } else {
2608                 /* Device shall be a master */
2609                 /*
2610                  * Watchdog timer (currently) for master only.
2611                  */
2612                 netdev->dev->watchdog_timeo = ISDN_NET_TX_TIMEOUT;
2613                 if (register_netdev(netdev->dev) != 0) {
2614                         printk(KERN_WARNING "isdn_net: Could not register net-device\n");
2615                         free_netdev(netdev->dev);
2616                         kfree(netdev);
2617                         return NULL;
2618                 }
2619         }
2620         netdev->queue = netdev->local;
2621         spin_lock_init(&netdev->queue_lock);
2622
2623         netdev->local->netdev = netdev;
2624
2625         INIT_WORK(&netdev->local->tqueue, isdn_net_softint);
2626         spin_lock_init(&netdev->local->xmit_lock);
2627
2628         /* Put into to netdev-chain */
2629         netdev->next = (void *) dev->netdev;
2630         dev->netdev = netdev;
2631         return netdev->dev->name;
2632 }
2633
2634 char *
2635 isdn_net_newslave(char *parm)
2636 {
2637         char *p = strchr(parm, ',');
2638         isdn_net_dev *n;
2639         char newname[10];
2640
2641         if (p) {
2642                 /* Slave-Name MUST not be empty */
2643                 if (!strlen(p + 1))
2644                         return NULL;
2645                 strcpy(newname, p + 1);
2646                 *p = 0;
2647                 /* Master must already exist */
2648                 if (!(n = isdn_net_findif(parm)))
2649                         return NULL;
2650                 /* Master must be a real interface, not a slave */
2651                 if (n->local->master)
2652                         return NULL;
2653                 /* Master must not be started yet */
2654                 if (isdn_net_device_started(n))
2655                         return NULL;
2656                 return (isdn_net_new(newname, n->dev));
2657         }
2658         return NULL;
2659 }
2660
2661 /*
2662  * Set interface-parameters.
2663  * Always set all parameters, so the user-level application is responsible
2664  * for not overwriting existing setups. It has to get the current
2665  * setup first, if only selected parameters are to be changed.
2666  */
2667 int
2668 isdn_net_setcfg(isdn_net_ioctl_cfg * cfg)
2669 {
2670         isdn_net_dev *p = isdn_net_findif(cfg->name);
2671         ulong features;
2672         int i;
2673         int drvidx;
2674         int chidx;
2675         char drvid[25];
2676
2677         if (p) {
2678                 isdn_net_local *lp = p->local;
2679
2680                 /* See if any registered driver supports the features we want */
2681                 features = ((1 << cfg->l2_proto) << ISDN_FEATURE_L2_SHIFT) |
2682                         ((1 << cfg->l3_proto) << ISDN_FEATURE_L3_SHIFT);
2683                 for (i = 0; i < ISDN_MAX_DRIVERS; i++)
2684                         if (dev->drv[i])
2685                                 if ((dev->drv[i]->interface->features & features) == features)
2686                                         break;
2687                 if (i == ISDN_MAX_DRIVERS) {
2688                         printk(KERN_WARNING "isdn_net: No driver with selected features\n");
2689                         return -ENODEV;
2690                 }
2691                 if (lp->p_encap != cfg->p_encap){
2692 #ifdef CONFIG_ISDN_X25
2693                         struct concap_proto * cprot = p -> cprot;
2694 #endif
2695                         if (isdn_net_device_started(p)) {
2696                                 printk(KERN_WARNING "%s: cannot change encap when if is up\n",
2697                                        p->dev->name);
2698                                 return -EBUSY;
2699                         }
2700 #ifdef CONFIG_ISDN_X25
2701                         if( cprot && cprot -> pops )
2702                                 cprot -> pops -> proto_del ( cprot );
2703                         p -> cprot = NULL;
2704                         lp -> dops = NULL;
2705                         /* ... ,  prepare for configuration of new one ... */
2706                         switch ( cfg -> p_encap ){
2707                         case ISDN_NET_ENCAP_X25IFACE:
2708                                 lp -> dops = &isdn_concap_reliable_dl_dops;
2709                         }
2710                         /* ... and allocate new one ... */
2711                         p -> cprot = isdn_concap_new( cfg -> p_encap );
2712                         /* p -> cprot == NULL now if p_encap is not supported
2713                            by means of the concap_proto mechanism */
2714                         /* the protocol is not configured yet; this will
2715                            happen later when isdn_net_reset() is called */
2716 #endif
2717                 }
2718                 switch ( cfg->p_encap ) {
2719                 case ISDN_NET_ENCAP_SYNCPPP:
2720 #ifndef CONFIG_ISDN_PPP
2721                         printk(KERN_WARNING "%s: SyncPPP support not configured\n",
2722                                p->dev->name);
2723                         return -EINVAL;
2724 #else
2725                         p->dev->type = ARPHRD_PPP;      /* change ARP type */
2726                         p->dev->addr_len = 0;
2727 #endif
2728                         break;
2729                 case ISDN_NET_ENCAP_X25IFACE:
2730 #ifndef CONFIG_ISDN_X25
2731                         printk(KERN_WARNING "%s: isdn-x25 support not configured\n",
2732                                p->dev->name);
2733                         return -EINVAL;
2734 #else
2735                         p->dev->type = ARPHRD_X25;      /* change ARP type */
2736                         p->dev->addr_len = 0;
2737 #endif
2738                         break;
2739                 case ISDN_NET_ENCAP_CISCOHDLCK:
2740                         break;
2741                 default:
2742                         if( cfg->p_encap >= 0 &&
2743                             cfg->p_encap <= ISDN_NET_ENCAP_MAX_ENCAP )
2744                                 break;
2745                         printk(KERN_WARNING
2746                                "%s: encapsulation protocol %d not supported\n",
2747                                p->dev->name, cfg->p_encap);
2748                         return -EINVAL;
2749                 }
2750                 if (strlen(cfg->drvid)) {
2751                         /* A bind has been requested ... */
2752                         char *c,
2753                         *e;
2754
2755                         drvidx = -1;
2756                         chidx = -1;
2757                         strcpy(drvid, cfg->drvid);
2758                         if ((c = strchr(drvid, ','))) {
2759                                 /* The channel-number is appended to the driver-Id with a comma */
2760                                 chidx = (int) simple_strtoul(c + 1, &e, 10);
2761                                 if (e == c)
2762                                         chidx = -1;
2763                                 *c = '\0';
2764                         }
2765                         for (i = 0; i < ISDN_MAX_DRIVERS; i++)
2766                                 /* Lookup driver-Id in array */
2767                                 if (!(strcmp(dev->drvid[i], drvid))) {
2768                                         drvidx = i;
2769                                         break;
2770                                 }
2771                         if ((drvidx == -1) || (chidx == -1))
2772                                 /* Either driver-Id or channel-number invalid */
2773                                 return -ENODEV;
2774                 } else {
2775                         /* Parameters are valid, so get them */
2776                         drvidx = lp->pre_device;
2777                         chidx = lp->pre_channel;
2778                 }
2779                 if (cfg->exclusive > 0) {
2780                         unsigned long flags;
2781
2782                         /* If binding is exclusive, try to grab the channel */
2783                         spin_lock_irqsave(&dev->lock, flags);
2784                         if ((i = isdn_get_free_channel(ISDN_USAGE_NET,
2785                                 lp->l2_proto, lp->l3_proto, drvidx,
2786                                 chidx, lp->msn)) < 0) {
2787                                 /* Grab failed, because desired channel is in use */
2788                                 lp->exclusive = -1;
2789                                 spin_unlock_irqrestore(&dev->lock, flags);
2790                                 return -EBUSY;
2791                         }
2792                         /* All went ok, so update isdninfo */
2793                         dev->usage[i] = ISDN_USAGE_EXCLUSIVE;
2794                         isdn_info_update();
2795                         spin_unlock_irqrestore(&dev->lock, flags);
2796                         lp->exclusive = i;
2797                 } else {
2798                         /* Non-exclusive binding or unbind. */
2799                         lp->exclusive = -1;
2800                         if ((lp->pre_device != -1) && (cfg->exclusive == -1)) {
2801                                 isdn_unexclusive_channel(lp->pre_device, lp->pre_channel);
2802                                 isdn_free_channel(lp->pre_device, lp->pre_channel, ISDN_USAGE_NET);
2803                                 drvidx = -1;
2804                                 chidx = -1;
2805                         }
2806                 }
2807                 strlcpy(lp->msn, cfg->eaz, sizeof(lp->msn));
2808                 lp->pre_device = drvidx;
2809                 lp->pre_channel = chidx;
2810                 lp->onhtime = cfg->onhtime;
2811                 lp->charge = cfg->charge;
2812                 lp->l2_proto = cfg->l2_proto;
2813                 lp->l3_proto = cfg->l3_proto;
2814                 lp->cbdelay = cfg->cbdelay;
2815                 lp->dialmax = cfg->dialmax;
2816                 lp->triggercps = cfg->triggercps;
2817                 lp->slavedelay = cfg->slavedelay * HZ;
2818                 lp->pppbind = cfg->pppbind;
2819                 lp->dialtimeout = cfg->dialtimeout >= 0 ? cfg->dialtimeout * HZ : -1;
2820                 lp->dialwait = cfg->dialwait * HZ;
2821                 if (cfg->secure)
2822                         lp->flags |= ISDN_NET_SECURE;
2823                 else
2824                         lp->flags &= ~ISDN_NET_SECURE;
2825                 if (cfg->cbhup)
2826                         lp->flags |= ISDN_NET_CBHUP;
2827                 else
2828                         lp->flags &= ~ISDN_NET_CBHUP;
2829                 switch (cfg->callback) {
2830                         case 0:
2831                                 lp->flags &= ~(ISDN_NET_CALLBACK | ISDN_NET_CBOUT);
2832                                 break;
2833                         case 1:
2834                                 lp->flags |= ISDN_NET_CALLBACK;
2835                                 lp->flags &= ~ISDN_NET_CBOUT;
2836                                 break;
2837                         case 2:
2838                                 lp->flags |= ISDN_NET_CBOUT;
2839                                 lp->flags &= ~ISDN_NET_CALLBACK;
2840                                 break;
2841                 }
2842                 lp->flags &= ~ISDN_NET_DIALMODE_MASK;   /* first all bits off */
2843                 if (cfg->dialmode && !(cfg->dialmode & ISDN_NET_DIALMODE_MASK)) {
2844                         /* old isdnctrl version, where only 0 or 1 is given */
2845                         printk(KERN_WARNING
2846                              "Old isdnctrl version detected! Please update.\n");
2847                         lp->flags |= ISDN_NET_DM_OFF; /* turn on `off' bit */
2848                 }
2849                 else {
2850                         lp->flags |= cfg->dialmode;  /* turn on selected bits */
2851                 }
2852                 if (cfg->chargehup)
2853                         lp->hupflags |= ISDN_CHARGEHUP;
2854                 else
2855                         lp->hupflags &= ~ISDN_CHARGEHUP;
2856                 if (cfg->ihup)
2857                         lp->hupflags |= ISDN_INHUP;
2858                 else
2859                         lp->hupflags &= ~ISDN_INHUP;
2860                 if (cfg->chargeint > 10) {
2861                         lp->hupflags |= ISDN_CHARGEHUP | ISDN_HAVECHARGE | ISDN_MANCHARGE;
2862                         lp->chargeint = cfg->chargeint * HZ;
2863                 }
2864                 if (cfg->p_encap != lp->p_encap) {
2865                         if (cfg->p_encap == ISDN_NET_ENCAP_RAWIP) {
2866                                 p->dev->header_ops = NULL;
2867                                 p->dev->flags = IFF_NOARP|IFF_POINTOPOINT;
2868                         } else {
2869                                 p->dev->header_ops = &isdn_header_ops;
2870                                 if (cfg->p_encap == ISDN_NET_ENCAP_ETHER)
2871                                         p->dev->flags = IFF_BROADCAST | IFF_MULTICAST;
2872                                 else
2873                                         p->dev->flags = IFF_NOARP|IFF_POINTOPOINT;
2874                         }
2875                 }
2876                 lp->p_encap = cfg->p_encap;
2877                 return 0;
2878         }
2879         return -ENODEV;
2880 }
2881
2882 /*
2883  * Perform get-interface-parameters.ioctl
2884  */
2885 int
2886 isdn_net_getcfg(isdn_net_ioctl_cfg * cfg)
2887 {
2888         isdn_net_dev *p = isdn_net_findif(cfg->name);
2889
2890         if (p) {
2891                 isdn_net_local *lp = p->local;
2892
2893                 strcpy(cfg->eaz, lp->msn);
2894                 cfg->exclusive = lp->exclusive;
2895                 if (lp->pre_device >= 0) {
2896                         sprintf(cfg->drvid, "%s,%d", dev->drvid[lp->pre_device],
2897                                 lp->pre_channel);
2898                 } else
2899                         cfg->drvid[0] = '\0';
2900                 cfg->onhtime = lp->onhtime;
2901                 cfg->charge = lp->charge;
2902                 cfg->l2_proto = lp->l2_proto;
2903                 cfg->l3_proto = lp->l3_proto;
2904                 cfg->p_encap = lp->p_encap;
2905                 cfg->secure = (lp->flags & ISDN_NET_SECURE) ? 1 : 0;
2906                 cfg->callback = 0;
2907                 if (lp->flags & ISDN_NET_CALLBACK)
2908                         cfg->callback = 1;
2909                 if (lp->flags & ISDN_NET_CBOUT)
2910                         cfg->callback = 2;
2911                 cfg->cbhup = (lp->flags & ISDN_NET_CBHUP) ? 1 : 0;
2912                 cfg->dialmode = lp->flags & ISDN_NET_DIALMODE_MASK;
2913                 cfg->chargehup = (lp->hupflags & 4) ? 1 : 0;
2914                 cfg->ihup = (lp->hupflags & 8) ? 1 : 0;
2915                 cfg->cbdelay = lp->cbdelay;
2916                 cfg->dialmax = lp->dialmax;
2917                 cfg->triggercps = lp->triggercps;
2918                 cfg->slavedelay = lp->slavedelay / HZ;
2919                 cfg->chargeint = (lp->hupflags & ISDN_CHARGEHUP) ?
2920                     (lp->chargeint / HZ) : 0;
2921                 cfg->pppbind = lp->pppbind;
2922                 cfg->dialtimeout = lp->dialtimeout >= 0 ? lp->dialtimeout / HZ : -1;
2923                 cfg->dialwait = lp->dialwait / HZ;
2924                 if (lp->slave) {
2925                         if (strlen(lp->slave->name) >= 10)
2926                                 strcpy(cfg->slave, "too-long");
2927                         else
2928                                 strcpy(cfg->slave, lp->slave->name);
2929                 } else
2930                         cfg->slave[0] = '\0';
2931                 if (lp->master) {
2932                         if (strlen(lp->master->name) >= 10)
2933                                 strcpy(cfg->master, "too-long");
2934                         else
2935                                 strcpy(cfg->master, lp->master->name);
2936                 } else
2937                         cfg->master[0] = '\0';
2938                 return 0;
2939         }
2940         return -ENODEV;
2941 }
2942
2943 /*
2944  * Add a phone-number to an interface.
2945  */
2946 int
2947 isdn_net_addphone(isdn_net_ioctl_phone * phone)
2948 {
2949         isdn_net_dev *p = isdn_net_findif(phone->name);
2950         isdn_net_phone *n;
2951
2952         if (p) {
2953                 if (!(n = kmalloc(sizeof(isdn_net_phone), GFP_KERNEL)))
2954                         return -ENOMEM;
2955                 strlcpy(n->num, phone->phone, sizeof(n->num));
2956                 n->next = p->local->phone[phone->outgoing & 1];
2957                 p->local->phone[phone->outgoing & 1] = n;
2958                 return 0;
2959         }
2960         return -ENODEV;
2961 }
2962
2963 /*
2964  * Copy a string of all phone-numbers of an interface to user space.
2965  * This might sleep and must be called with the isdn semaphore down.
2966  */
2967 int
2968 isdn_net_getphones(isdn_net_ioctl_phone * phone, char __user *phones)
2969 {
2970         isdn_net_dev *p = isdn_net_findif(phone->name);
2971         int inout = phone->outgoing & 1;
2972         int more = 0;
2973         int count = 0;
2974         isdn_net_phone *n;
2975
2976         if (!p)
2977                 return -ENODEV;
2978         inout &= 1;
2979         for (n = p->local->phone[inout]; n; n = n->next) {
2980                 if (more) {
2981                         put_user(' ', phones++);
2982                         count++;
2983                 }
2984                 if (copy_to_user(phones, n->num, strlen(n->num) + 1)) {
2985                         return -EFAULT;
2986                 }
2987                 phones += strlen(n->num);
2988                 count += strlen(n->num);
2989                 more = 1;
2990         }
2991         put_user(0, phones);
2992         count++;
2993         return count;
2994 }
2995
2996 /*
2997  * Copy a string containing the peer's phone number of a connected interface
2998  * to user space.
2999  */
3000 int
3001 isdn_net_getpeer(isdn_net_ioctl_phone *phone, isdn_net_ioctl_phone __user *peer)
3002 {
3003         isdn_net_dev *p = isdn_net_findif(phone->name);
3004         int ch, dv, idx;
3005
3006         if (!p)
3007                 return -ENODEV;
3008         /*
3009          * Theoretical race: while this executes, the remote number might
3010          * become invalid (hang up) or change (new connection), resulting
3011          * in (partially) wrong number copied to user. This race
3012          * currently ignored.
3013          */
3014         ch = p->local->isdn_channel;
3015         dv = p->local->isdn_device;
3016         if(ch < 0 && dv < 0)
3017                 return -ENOTCONN;
3018         idx = isdn_dc2minor(dv, ch);
3019         if (idx <0 )
3020                 return -ENODEV;
3021         /* for pre-bound channels, we need this extra check */
3022         if (strncmp(dev->num[idx], "???", 3) == 0)
3023                 return -ENOTCONN;
3024         strncpy(phone->phone, dev->num[idx], ISDN_MSNLEN);
3025         phone->outgoing = USG_OUTGOING(dev->usage[idx]);
3026         if (copy_to_user(peer, phone, sizeof(*peer)))
3027                 return -EFAULT;
3028         return 0;
3029 }
3030 /*
3031  * Delete a phone-number from an interface.
3032  */
3033 int
3034 isdn_net_delphone(isdn_net_ioctl_phone * phone)
3035 {
3036         isdn_net_dev *p = isdn_net_findif(phone->name);
3037         int inout = phone->outgoing & 1;
3038         isdn_net_phone *n;
3039         isdn_net_phone *m;
3040
3041         if (p) {
3042                 n = p->local->phone[inout];
3043                 m = NULL;
3044                 while (n) {
3045                         if (!strcmp(n->num, phone->phone)) {
3046                                 if (p->local->dial == n)
3047                                         p->local->dial = n->next;
3048                                 if (m)
3049                                         m->next = n->next;
3050                                 else
3051                                         p->local->phone[inout] = n->next;
3052                                 kfree(n);
3053                                 return 0;
3054                         }
3055                         m = n;
3056                         n = (isdn_net_phone *) n->next;
3057                 }
3058                 return -EINVAL;
3059         }
3060         return -ENODEV;
3061 }
3062
3063 /*
3064  * Delete all phone-numbers of an interface.
3065  */
3066 static int
3067 isdn_net_rmallphone(isdn_net_dev * p)
3068 {
3069         isdn_net_phone *n;
3070         isdn_net_phone *m;
3071         int i;
3072
3073         for (i = 0; i < 2; i++) {
3074                 n = p->local->phone[i];
3075                 while (n) {
3076                         m = n->next;
3077                         kfree(n);
3078                         n = m;
3079                 }
3080                 p->local->phone[i] = NULL;
3081         }
3082         p->local->dial = NULL;
3083         return 0;
3084 }
3085
3086 /*
3087  * Force a hangup of a network-interface.
3088  */
3089 int
3090 isdn_net_force_hangup(char *name)
3091 {
3092         isdn_net_dev *p = isdn_net_findif(name);
3093         struct net_device *q;
3094
3095         if (p) {
3096                 if (p->local->isdn_device < 0)
3097                         return 1;
3098                 q = p->local->slave;
3099                 /* If this interface has slaves, do a hangup for them also. */
3100                 while (q) {
3101                         isdn_net_hangup(q);
3102                         q = MASTER_TO_SLAVE(q);
3103                 }
3104                 isdn_net_hangup(p->dev);
3105                 return 0;
3106         }
3107         return -ENODEV;
3108 }
3109
3110 /*
3111  * Helper-function for isdn_net_rm: Do the real work.
3112  */
3113 static int
3114 isdn_net_realrm(isdn_net_dev * p, isdn_net_dev * q)
3115 {
3116         u_long flags;
3117
3118         if (isdn_net_device_started(p)) {
3119                 return -EBUSY;
3120         }
3121 #ifdef CONFIG_ISDN_X25
3122         if( p -> cprot && p -> cprot -> pops )
3123                 p -> cprot -> pops -> proto_del ( p -> cprot );
3124 #endif
3125         /* Free all phone-entries */
3126         isdn_net_rmallphone(p);
3127         /* If interface is bound exclusive, free channel-usage */
3128         if (p->local->exclusive != -1)
3129                 isdn_unexclusive_channel(p->local->pre_device, p->local->pre_channel);
3130         if (p->local->master) {
3131                 /* It's a slave-device, so update master's slave-pointer if necessary */
3132                 if (((isdn_net_local *) ISDN_MASTER_PRIV(p->local))->slave ==
3133                     p->dev)
3134                         ((isdn_net_local *)ISDN_MASTER_PRIV(p->local))->slave =
3135                                 p->local->slave;
3136         } else {
3137                 /* Unregister only if it's a master-device */
3138                 unregister_netdev(p->dev);
3139         }
3140         /* Unlink device from chain */
3141         spin_lock_irqsave(&dev->lock, flags);
3142         if (q)
3143                 q->next = p->next;
3144         else
3145                 dev->netdev = p->next;
3146         if (p->local->slave) {
3147                 /* If this interface has a slave, remove it also */
3148                 char *slavename = p->local->slave->name;
3149                 isdn_net_dev *n = dev->netdev;
3150                 q = NULL;
3151                 while (n) {
3152                         if (!strcmp(n->dev->name, slavename)) {
3153                                 spin_unlock_irqrestore(&dev->lock, flags);
3154                                 isdn_net_realrm(n, q);
3155                                 spin_lock_irqsave(&dev->lock, flags);
3156                                 break;
3157                         }
3158                         q = n;
3159                         n = (isdn_net_dev *)n->next;
3160                 }
3161         }
3162         spin_unlock_irqrestore(&dev->lock, flags);
3163         /* If no more net-devices remain, disable auto-hangup timer */
3164         if (dev->netdev == NULL)
3165                 isdn_timer_ctrl(ISDN_TIMER_NETHANGUP, 0);
3166         free_netdev(p->dev);
3167         kfree(p);
3168
3169         return 0;
3170 }
3171
3172 /*
3173  * Remove a single network-interface.
3174  */
3175 int
3176 isdn_net_rm(char *name)
3177 {
3178         u_long flags;
3179         isdn_net_dev *p;
3180         isdn_net_dev *q;
3181
3182         /* Search name in netdev-chain */
3183         spin_lock_irqsave(&dev->lock, flags);
3184         p = dev->netdev;
3185         q = NULL;
3186         while (p) {
3187                 if (!strcmp(p->dev->name, name)) {
3188                         spin_unlock_irqrestore(&dev->lock, flags);
3189                         return (isdn_net_realrm(p, q));
3190                 }
3191                 q = p;
3192                 p = (isdn_net_dev *) p->next;
3193         }
3194         spin_unlock_irqrestore(&dev->lock, flags);
3195         /* If no more net-devices remain, disable auto-hangup timer */
3196         if (dev->netdev == NULL)
3197                 isdn_timer_ctrl(ISDN_TIMER_NETHANGUP, 0);
3198         return -ENODEV;
3199 }
3200
3201 /*
3202  * Remove all network-interfaces
3203  */
3204 int
3205 isdn_net_rmall(void)
3206 {
3207         u_long flags;
3208         int ret;
3209
3210         /* Walk through netdev-chain */
3211         spin_lock_irqsave(&dev->lock, flags);
3212         while (dev->netdev) {
3213                 if (!dev->netdev->local->master) {
3214                         /* Remove master-devices only, slaves get removed with their master */
3215                         spin_unlock_irqrestore(&dev->lock, flags);
3216                         if ((ret = isdn_net_realrm(dev->netdev, NULL))) {
3217                                 return ret;
3218                         }
3219                         spin_lock_irqsave(&dev->lock, flags);
3220                 }
3221         }
3222         dev->netdev = NULL;
3223         spin_unlock_irqrestore(&dev->lock, flags);
3224         return 0;
3225 }