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   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 <net/arp.h>
  27 #include <net/dst.h>
  28 #include <net/pkt_sched.h>
  29 #include <linux/inetdevice.h>
  30 #include "isdn_common.h"
  31 #include "isdn_net.h"
  32 #ifdef CONFIG_ISDN_PPP
  33 #include "isdn_ppp.h"
  34 #endif
  35 #ifdef CONFIG_ISDN_X25
  36 #include <linux/concap.h>
  37 #include "isdn_concap.h"
  38 #endif
  39
  40
  41 /*
  42  * Outline of new tbusy handling:
  43  *
  44  * Old method, roughly spoken, consisted of setting tbusy when entering
  45  * isdn_net_start_xmit() and at several other locations and clearing
  46  * it from isdn_net_start_xmit() thread when sending was successful.
  47  *
  48  * With 2.3.x multithreaded network core, to prevent problems, tbusy should
  49  * only be set by the isdn_net_start_xmit() thread and only when a tx-busy
  50  * condition is detected. Other threads (in particular isdn_net_stat_callb())
  51  * are only allowed to clear tbusy.
  52  *
  53  * -HE
  54  */
  55
  56 /*
  57  * About SOFTNET:
  58  * Most of the changes were pretty obvious and basically done by HE already.
  59  *
  60  * One problem of the isdn net device code is that is uses struct net_device
  61  * for masters and slaves. However, only master interface are registered to
  62  * the network layer, and therefore, it only makes sense to call netif_*
  63  * functions on them.
  64  *
  65  * --KG
  66  */
  67
  68 /*
  69  * Find out if the netdevice has been ifup-ed yet.
  70  * For slaves, look at the corresponding master.
  71  */
  72 static __inline__ int isdn_net_device_started(isdn_net_dev *n)
  73 {
  74         isdn_net_local *lp = n->local;
  75         struct net_device *dev;
  76
  77         if (lp->master)
  78                 dev = lp->master;
  79         else
  80                 dev = n->dev;
  81         return netif_running(dev);
  82 }
  83
  84 /*
  85  * wake up the network -> net_device queue.
  86  * For slaves, wake the corresponding master interface.
  87  */
  88 static __inline__ void isdn_net_device_wake_queue(isdn_net_local *lp)
  89 {
  90         if (lp->master)
  91                 netif_wake_queue(lp->master);
  92         else
  93                 netif_wake_queue(lp->netdev->dev);
  94 }
  95
  96 /*
  97  * stop the network -> net_device queue.
  98  * For slaves, stop the corresponding master interface.
  99  */
 100 static __inline__ void isdn_net_device_stop_queue(isdn_net_local *lp)
 101 {
 102         if (lp->master)
 103                 netif_stop_queue(lp->master);
 104         else
 105                 netif_stop_queue(lp->netdev->dev);
 106 }
 107
 108 /*
 109  * find out if the net_device which this lp belongs to (lp can be
 110  * master or slave) is busy. It's busy iff all (master and slave)
 111  * queues are busy
 112  */
 113 static __inline__ int isdn_net_device_busy(isdn_net_local *lp)
 114 {
 115         isdn_net_local *nlp;
 116         isdn_net_dev *nd;
 117         unsigned long flags;
 118
 119         if (!isdn_net_lp_busy(lp))
 120                 return 0;
 121
 122         if (lp->master)
 123                 nd = ISDN_MASTER_PRIV(lp)->netdev;
 124         else
 125                 nd = lp->netdev;
 126
 127         spin_lock_irqsave(&nd->queue_lock, flags);
 128         nlp = lp->next;
 129         while (nlp != lp) {
 130                 if (!isdn_net_lp_busy(nlp)) {
 131                         spin_unlock_irqrestore(&nd->queue_lock, flags);
 132                         return 0;
 133                 }
 134                 nlp = nlp->next;
 135         }
 136         spin_unlock_irqrestore(&nd->queue_lock, flags);
 137         return 1;
 138 }
 139
 140 static __inline__ void isdn_net_inc_frame_cnt(isdn_net_local *lp)
 141 {
 142         atomic_inc(&lp->frame_cnt);
 143         if (isdn_net_device_busy(lp))
 144                 isdn_net_device_stop_queue(lp);
 145 }
 146
 147 static __inline__ void isdn_net_dec_frame_cnt(isdn_net_local *lp)
 148 {
 149         atomic_dec(&lp->frame_cnt);
 150
 151         if (!(isdn_net_device_busy(lp))) {
 152                 if (!skb_queue_empty(&lp->super_tx_queue)) {
 153                         schedule_work(&lp->tqueue);
 154                 } else {
 155                         isdn_net_device_wake_queue(lp);
 156                 }
 157        }
 158 }
 159
 160 static __inline__ void isdn_net_zero_frame_cnt(isdn_net_local *lp)
 161 {
 162         atomic_set(&lp->frame_cnt, 0);
 163 }
 164
 165 /* For 2.2.x we leave the transmitter busy timeout at 2 secs, just
 166  * to be safe.
 167  * For 2.3.x we push it up to 20 secs, because call establishment
 168  * (in particular callback) may take such a long time, and we
 169  * don't want confusing messages in the log. However, there is a slight
 170  * possibility that this large timeout will break other things like MPPP,
 171  * which might rely on the tx timeout. If so, we'll find out this way...
 172  */
 173
 174 #define ISDN_NET_TX_TIMEOUT (20*HZ)
 175
 176 /* Prototypes */
 177
 178 static int isdn_net_force_dial_lp(isdn_net_local *);
 179 static int isdn_net_start_xmit(struct sk_buff *, struct net_device *);
 180
 181 static void isdn_net_ciscohdlck_connected(isdn_net_local *lp);
 182 static void isdn_net_ciscohdlck_disconnected(isdn_net_local *lp);
 183
 184 char *isdn_net_revision = "$Revision: 1.1.2.2 $";
 185
 186  /*
 187   * Code for raw-networking over ISDN
 188   */
 189
 190 static void
 191 isdn_net_unreachable(struct net_device *dev, struct sk_buff *skb, char *reason)
 192 {
 193         if(skb) {
 194
 195                 u_short proto = ntohs(skb->protocol);
 196
 197                 printk(KERN_DEBUG "isdn_net: %s: %s, signalling dst_link_failure %s\n",
 198                        dev->name,
 199                        (reason != NULL) ? reason : "unknown",
 200                        (proto != ETH_P_IP) ? "Protocol != ETH_P_IP" : "");
 201
 202                 dst_link_failure(skb);
 203         }
 204         else {  /* dial not triggered by rawIP packet */
 205                 printk(KERN_DEBUG "isdn_net: %s: %s\n",
 206                            dev->name,
 207                            (reason != NULL) ? reason : "reason unknown");
 208         }
 209 }
 210
 211 static void
 212 isdn_net_reset(struct net_device *dev)
 213 {
 214 #ifdef CONFIG_ISDN_X25
 215         struct concap_device_ops * dops =
 216                 ((isdn_net_local *) netdev_priv(dev))->dops;
 217         struct concap_proto * cprot =
 218                 ((isdn_net_local *) netdev_priv(dev))->netdev->cprot;
 219 #endif
 220 #ifdef CONFIG_ISDN_X25
 221         if( cprot && cprot -> pops && dops )
 222                 cprot -> pops -> restart ( cprot, dev, dops );
 223 #endif
 224 }
 225
 226 /* Open/initialize the board. */
 227 static int
 228 isdn_net_open(struct net_device *dev)
 229 {
 230         int i;
 231         struct net_device *p;
 232         struct in_device *in_dev;
 233
 234         /* moved here from isdn_net_reset, because only the master has an
 235            interface associated which is supposed to be started. BTW:
 236            we need to call netif_start_queue, not netif_wake_queue here */
 237         netif_start_queue(dev);
 238
 239         isdn_net_reset(dev);
 240         /* Fill in the MAC-level header (not needed, but for compatibility... */
 241         for (i = 0; i < ETH_ALEN - sizeof(u32); i++)
 242                 dev->dev_addr[i] = 0xfc;
 243         if ((in_dev = dev->ip_ptr) != NULL) {
 244                 /*
 245                  *      Any address will do - we take the first
 246                  */
 247                 struct in_ifaddr *ifa = in_dev->ifa_list;
 248                 if (ifa != NULL)
 249                         memcpy(dev->dev_addr+2, &ifa->ifa_local, 4);
 250         }
 251
 252         /* If this interface has slaves, start them also */
 253         p = MASTER_TO_SLAVE(dev);
 254         if (p) {
 255                 while (p) {
 256                         isdn_net_reset(p);
 257                         p = MASTER_TO_SLAVE(p);
 258                 }
 259         }
 260         isdn_lock_drivers();
 261         return 0;
 262 }
 263
 264 /*
 265  * Assign an ISDN-channel to a net-interface
 266  */
 267 static void
 268 isdn_net_bind_channel(isdn_net_local * lp, int idx)
 269 {
 270         lp->flags |= ISDN_NET_CONNECTED;
 271         lp->isdn_device = dev->drvmap[idx];
 272         lp->isdn_channel = dev->chanmap[idx];
 273         dev->rx_netdev[idx] = lp->netdev;
 274         dev->st_netdev[idx] = lp->netdev;
 275 }
 276
 277 /*
 278  * unbind a net-interface (resets interface after an error)
 279  */
 280 static void
 281 isdn_net_unbind_channel(isdn_net_local * lp)
 282 {
 283         skb_queue_purge(&lp->super_tx_queue);
 284
 285         if (!lp->master) {      /* reset only master device */
 286                 /* Moral equivalent of dev_purge_queues():
 287                    BEWARE! This chunk of code cannot be called from hardware
 288                    interrupt handler. I hope it is true. --ANK
 289                  */
 290                 qdisc_reset_all_tx(lp->netdev->dev);
 291         }
 292         lp->dialstate = 0;
 293         dev->rx_netdev[isdn_dc2minor(lp->isdn_device, lp->isdn_channel)] = NULL;
 294         dev->st_netdev[isdn_dc2minor(lp->isdn_device, lp->isdn_channel)] = NULL;
 295         if (lp->isdn_device != -1 && lp->isdn_channel != -1)
 296                 isdn_free_channel(lp->isdn_device, lp->isdn_channel,
 297                                   ISDN_USAGE_NET);
 298         lp->flags &= ~ISDN_NET_CONNECTED;
 299         lp->isdn_device = -1;
 300         lp->isdn_channel = -1;
 301 }
 302
 303 /*
 304  * Perform auto-hangup and cps-calculation for net-interfaces.
 305  *
 306  * auto-hangup:
 307  * Increment idle-counter (this counter is reset on any incoming or
 308  * outgoing packet), if counter exceeds configured limit either do a
 309  * hangup immediately or - if configured - wait until just before the next
 310  * charge-info.
 311  *
 312  * cps-calculation (needed for dynamic channel-bundling):
 313  * Since this function is called every second, simply reset the
 314  * byte-counter of the interface after copying it to the cps-variable.
 315  */
 316 static unsigned long last_jiffies = -HZ;
 317
 318 void
 319 isdn_net_autohup(void)
 320 {
 321         isdn_net_dev *p = dev->netdev;
 322         int anymore;
 323
 324         anymore = 0;
 325         while (p) {
 326                 isdn_net_local *l = p->local;
 327                 if (jiffies == last_jiffies)
 328                         l->cps = l->transcount;
 329                 else
 330                         l->cps = (l->transcount * HZ) / (jiffies - last_jiffies);
 331                 l->transcount = 0;
 332                 if (dev->net_verbose > 3)
 333                         printk(KERN_DEBUG "%s: %d bogocps\n", p->dev->name, l->cps);
 334                 if ((l->flags & ISDN_NET_CONNECTED) && (!l->dialstate)) {
 335                         anymore = 1;
 336                         l->huptimer++;
 337                         /*
 338                          * if there is some dialmode where timeout-hangup
 339                          * should _not_ be done, check for that here
 340                          */
 341                         if ((l->onhtime) &&
 342                             (l->huptimer > l->onhtime))
 343                         {
 344                                 if (l->hupflags & ISDN_MANCHARGE &&
 345                                     l->hupflags & ISDN_CHARGEHUP) {
 346                                         while (time_after(jiffies, l->chargetime + l->chargeint))
 347                                                 l->chargetime += l->chargeint;
 348                                         if (time_after(jiffies, l->chargetime + l->chargeint - 2 * HZ))
 349                                                 if (l->outgoing || l->hupflags & ISDN_INHUP)
 350                                                         isdn_net_hangup(p->dev);
 351                                 } else if (l->outgoing) {
 352                                         if (l->hupflags & ISDN_CHARGEHUP) {
 353                                                 if (l->hupflags & ISDN_WAITCHARGE) {
 354                                                         printk(KERN_DEBUG "isdn_net: Hupflags of %s are %X\n",
 355                                                                p->dev->name, l->hupflags);
 356                                                         isdn_net_hangup(p->dev);
 357                                                 } else if (time_after(jiffies, l->chargetime + l->chargeint)) {
 358                                                         printk(KERN_DEBUG
 359                                                                "isdn_net: %s: chtime = %lu, chint = %d\n",
 360                                                                p->dev->name, l->chargetime, l->chargeint);
 361                                                         isdn_net_hangup(p->dev);
 362                                                 }
 363                                         } else
 364                                                 isdn_net_hangup(p->dev);
 365                                 } else if (l->hupflags & ISDN_INHUP)
 366                                         isdn_net_hangup(p->dev);
 367                         }
 368
 369                         if(dev->global_flags & ISDN_GLOBAL_STOPPED || (ISDN_NET_DIALMODE(*l) == ISDN_NET_DM_OFF)) {
 370                                 isdn_net_hangup(p->dev);
 371                                 break;
 372                         }
 373                 }
 374                 p = (isdn_net_dev *) p->next;
 375         }
 376         last_jiffies = jiffies;
 377         isdn_timer_ctrl(ISDN_TIMER_NETHANGUP, anymore);
 378 }
 379
 380 static void isdn_net_lp_disconnected(isdn_net_local *lp)
 381 {
 382         isdn_net_rm_from_bundle(lp);
 383 }
 384
 385 /*
 386  * Handle status-messages from ISDN-interfacecard.
 387  * This function is called from within the main-status-dispatcher
 388  * isdn_status_callback, which itself is called from the low-level driver.
 389  * Return: 1 = Event handled, 0 = not for us or unknown Event.
 390  */
 391 int
 392 isdn_net_stat_callback(int idx, isdn_ctrl *c)
 393 {
 394         isdn_net_dev *p = dev->st_netdev[idx];
 395         int cmd = c->command;
 396
 397         if (p) {
 398                 isdn_net_local *lp = p->local;
 399 #ifdef CONFIG_ISDN_X25
 400                 struct concap_proto *cprot = lp->netdev->cprot;
 401                 struct concap_proto_ops *pops = cprot ? cprot->pops : NULL;
 402 #endif
 403                 switch (cmd) {
 404                         case ISDN_STAT_BSENT:
 405                                 /* A packet has successfully been sent out */
 406                                 if ((lp->flags & ISDN_NET_CONNECTED) &&
 407                                     (!lp->dialstate)) {
 408                                         isdn_net_dec_frame_cnt(lp);
 409                                         lp->stats.tx_packets++;
 410                                         lp->stats.tx_bytes += c->parm.length;
 411                                 }
 412                                 return 1;
 413                         case ISDN_STAT_DCONN:
 414                                 /* D-Channel is up */
 415                                 switch (lp->dialstate) {
 416                                         case 4:
 417                                         case 7:
 418                                         case 8:
 419                                                 lp->dialstate++;
 420                                                 return 1;
 421                                         case 12:
 422                                                 lp->dialstate = 5;
 423                                                 return 1;
 424                                 }
 425                                 break;
 426                         case ISDN_STAT_DHUP:
 427                                 /* Either D-Channel-hangup or error during dialout */
 428 #ifdef CONFIG_ISDN_X25
 429                                 /* If we are not connencted then dialing had
 430                                    failed. If there are generic encap protocol
 431                                    receiver routines signal the closure of
 432                                    the link*/
 433
 434                                 if( !(lp->flags & ISDN_NET_CONNECTED)
 435                                     && pops && pops -> disconn_ind )
 436                                         pops -> disconn_ind(cprot);
 437 #endif /* CONFIG_ISDN_X25 */
 438                                 if ((!lp->dialstate) && (lp->flags & ISDN_NET_CONNECTED)) {
 439                                         if (lp->p_encap == ISDN_NET_ENCAP_CISCOHDLCK)
 440                                                 isdn_net_ciscohdlck_disconnected(lp);
 441 #ifdef CONFIG_ISDN_PPP
 442                                         if (lp->p_encap == ISDN_NET_ENCAP_SYNCPPP)
 443                                                 isdn_ppp_free(lp);
 444 #endif
 445                                         isdn_net_lp_disconnected(lp);
 446                                         isdn_all_eaz(lp->isdn_device, lp->isdn_channel);
 447                                         printk(KERN_INFO "%s: remote hangup\n", p->dev->name);
 448                                         printk(KERN_INFO "%s: Chargesum is %d\n", p->dev->name,
 449                                                lp->charge);
 450                                         isdn_net_unbind_channel(lp);
 451                                         return 1;
 452                                 }
 453                                 break;
 454 #ifdef CONFIG_ISDN_X25
 455                         case ISDN_STAT_BHUP:
 456                                 /* B-Channel-hangup */
 457                                 /* try if there are generic encap protocol
 458                                    receiver routines and signal the closure of
 459                                    the link */
 460                                 if( pops  &&  pops -> disconn_ind ){
 461                                                 pops -> disconn_ind(cprot);
 462                                                 return 1;
 463                                         }
 464                                 break;
 465 #endif /* CONFIG_ISDN_X25 */
 466                         case ISDN_STAT_BCONN:
 467                                 /* B-Channel is up */
 468                                 isdn_net_zero_frame_cnt(lp);
 469                                 switch (lp->dialstate) {
 470                                         case 5:
 471                                         case 6:
 472                                         case 7:
 473                                         case 8:
 474                                         case 9:
 475                                         case 10:
 476                                         case 12:
 477                                                 if (lp->dialstate <= 6) {
 478                                                         dev->usage[idx] |= ISDN_USAGE_OUTGOING;
 479                                                         isdn_info_update();
 480                                                 } else
 481                                                         dev->rx_netdev[idx] = p;
 482                                                 lp->dialstate = 0;
 483                                                 isdn_timer_ctrl(ISDN_TIMER_NETHANGUP, 1);
 484                                                 if (lp->p_encap == ISDN_NET_ENCAP_CISCOHDLCK)
 485                                                         isdn_net_ciscohdlck_connected(lp);
 486                                                 if (lp->p_encap != ISDN_NET_ENCAP_SYNCPPP) {
 487                                                         if (lp->master) { /* is lp a slave? */
 488                                                                 isdn_net_dev *nd = ISDN_MASTER_PRIV(lp)->netdev;
 489                                                                 isdn_net_add_to_bundle(nd, lp);
 490                                                         }
 491                                                 }
 492                                                 printk(KERN_INFO "isdn_net: %s connected\n", p->dev->name);
 493                                                 /* If first Chargeinfo comes before B-Channel connect,
 494                                                  * we correct the timestamp here.
 495                                                  */
 496                                                 lp->chargetime = jiffies;
 497
 498                                                 /* reset dial-timeout */
 499                                                 lp->dialstarted = 0;
 500                                                 lp->dialwait_timer = 0;
 501
 502 #ifdef CONFIG_ISDN_PPP
 503                                                 if (lp->p_encap == ISDN_NET_ENCAP_SYNCPPP)
 504                                                         isdn_ppp_wakeup_daemon(lp);
 505 #endif
 506 #ifdef CONFIG_ISDN_X25
 507                                                 /* try if there are generic concap receiver routines */
 508                                                 if( pops )
 509                                                         if( pops->connect_ind)
 510                                                                 pops->connect_ind(cprot);
 511 #endif /* CONFIG_ISDN_X25 */
 512                                                 /* ppp needs to do negotiations first */
 513                                                 if (lp->p_encap != ISDN_NET_ENCAP_SYNCPPP)
 514                                                         isdn_net_device_wake_queue(lp);
 515                                                 return 1;
 516                                 }
 517                                 break;
 518                         case ISDN_STAT_NODCH:
 519                                 /* No D-Channel avail. */
 520                                 if (lp->dialstate == 4) {
 521                                         lp->dialstate--;
 522                                         return 1;
 523                                 }
 524                                 break;
 525                         case ISDN_STAT_CINF:
 526                                 /* Charge-info from TelCo. Calculate interval between
 527                                  * charge-infos and set timestamp for last info for
 528                                  * usage by isdn_net_autohup()
 529                                  */
 530                                 lp->charge++;
 531                                 if (lp->hupflags & ISDN_HAVECHARGE) {
 532                                         lp->hupflags &= ~ISDN_WAITCHARGE;
 533                                         lp->chargeint = jiffies - lp->chargetime - (2 * HZ);
 534                                 }
 535                                 if (lp->hupflags & ISDN_WAITCHARGE)
 536                                         lp->hupflags |= ISDN_HAVECHARGE;
 537                                 lp->chargetime = jiffies;
 538                                 printk(KERN_DEBUG "isdn_net: Got CINF chargetime of %s now %lu\n",
 539                                        p->dev->name, lp->chargetime);
 540                                 return 1;
 541                 }
 542         }
 543         return 0;
 544 }
 545
 546 /*
 547  * Perform dialout for net-interfaces and timeout-handling for
 548  * D-Channel-up and B-Channel-up Messages.
 549  * This function is initially called from within isdn_net_start_xmit() or
 550  * or isdn_net_find_icall() after initializing the dialstate for an
 551  * interface. If further calls are needed, the function schedules itself
 552  * for a timer-callback via isdn_timer_function().
 553  * The dialstate is also affected by incoming status-messages from
 554  * the ISDN-Channel which are handled in isdn_net_stat_callback() above.
 555  */
 556 void
 557 isdn_net_dial(void)
 558 {
 559         isdn_net_dev *p = dev->netdev;
 560         int anymore = 0;
 561         int i;
 562         isdn_ctrl cmd;
 563         u_char *phone_number;
 564
 565         while (p) {
 566                 isdn_net_local *lp = p->local;
 567
 568 #ifdef ISDN_DEBUG_NET_DIAL
 569                 if (lp->dialstate)
 570                         printk(KERN_DEBUG "%s: dialstate=%d\n", p->dev->name, lp->dialstate);
 571 #endif
 572                 switch (lp->dialstate) {
 573                         case 0:
 574                                 /* Nothing to do for this interface */
 575                                 break;
 576                         case 1:
 577                                 /* Initiate dialout. Set phone-number-pointer to first number
 578                                  * of interface.
 579                                  */
 580                                 lp->dial = lp->phone[1];
 581                                 if (!lp->dial) {
 582                                         printk(KERN_WARNING "%s: phone number deleted?\n",
 583                                                p->dev->name);
 584                                         isdn_net_hangup(p->dev);
 585                                         break;
 586                                 }
 587                                 anymore = 1;
 588
 589                                 if(lp->dialtimeout > 0)
 590                                         if(lp->dialstarted == 0 || time_after(jiffies, lp->dialstarted + lp->dialtimeout + lp->dialwait)) {
 591                                                 lp->dialstarted = jiffies;
 592                                                 lp->dialwait_timer = 0;
 593                                         }
 594
 595                                 lp->dialstate++;
 596                                 /* Fall through */
 597                         case 2:
 598                                 /* Prepare dialing. Clear EAZ, then set EAZ. */
 599                                 cmd.driver = lp->isdn_device;
 600                                 cmd.arg = lp->isdn_channel;
 601                                 cmd.command = ISDN_CMD_CLREAZ;
 602                                 isdn_command(&cmd);
 603                                 sprintf(cmd.parm.num, "%s", isdn_map_eaz2msn(lp->msn, cmd.driver));
 604                                 cmd.command = ISDN_CMD_SETEAZ;
 605                                 isdn_command(&cmd);
 606                                 lp->dialretry = 0;
 607                                 anymore = 1;
 608                                 lp->dialstate++;
 609                                 /* Fall through */
 610                         case 3:
 611                                 /* Setup interface, dial current phone-number, switch to next number.
 612                                  * If list of phone-numbers is exhausted, increment
 613                                  * retry-counter.
 614                                  */
 615                                 if(dev->global_flags & ISDN_GLOBAL_STOPPED || (ISDN_NET_DIALMODE(*lp) == ISDN_NET_DM_OFF)) {
 616                                         char *s;
 617                                         if (dev->global_flags & ISDN_GLOBAL_STOPPED)
 618                                                 s = "dial suppressed: isdn system stopped";
 619                                         else
 620                                                 s = "dial suppressed: dialmode `off'";
 621                                         isdn_net_unreachable(p->dev, NULL, s);
 622                                         isdn_net_hangup(p->dev);
 623                                         break;
 624                                 }
 625                                 cmd.driver = lp->isdn_device;
 626                                 cmd.command = ISDN_CMD_SETL2;
 627                                 cmd.arg = lp->isdn_channel + (lp->l2_proto << 8);
 628                                 isdn_command(&cmd);
 629                                 cmd.driver = lp->isdn_device;
 630                                 cmd.command = ISDN_CMD_SETL3;
 631                                 cmd.arg = lp->isdn_channel + (lp->l3_proto << 8);
 632                                 isdn_command(&cmd);
 633                                 cmd.driver = lp->isdn_device;
 634                                 cmd.arg = lp->isdn_channel;
 635                                 if (!lp->dial) {
 636                                         printk(KERN_WARNING "%s: phone number deleted?\n",
 637                                                p->dev->name);
 638                                         isdn_net_hangup(p->dev);
 639                                         break;
 640                                 }
 641                                 if (!strncmp(lp->dial->num, "LEASED", strlen("LEASED"))) {
 642                                         lp->dialstate = 4;
 643                                         printk(KERN_INFO "%s: Open leased line ...\n", p->dev->name);
 644                                 } else {
 645                                         if(lp->dialtimeout > 0)
 646                                                 if (time_after(jiffies, lp->dialstarted + lp->dialtimeout)) {
 647                                                         lp->dialwait_timer = jiffies + lp->dialwait;
 648                                                         lp->dialstarted = 0;
 649                                                         isdn_net_unreachable(p->dev, NULL, "dial: timed out");
 650                                                         isdn_net_hangup(p->dev);
 651                                                         break;
 652                                                 }
 653
 654                                         cmd.driver = lp->isdn_device;
 655                                         cmd.command = ISDN_CMD_DIAL;
 656                                         cmd.parm.setup.si2 = 0;
 657
 658                                         /* check for DOV */
 659                                         phone_number = lp->dial->num;
 660                                         if ((*phone_number == 'v') ||
 661                                             (*phone_number == 'V')) { /* DOV call */
 662                                                 cmd.parm.setup.si1 = 1;
 663                                         } else { /* DATA call */
 664                                                 cmd.parm.setup.si1 = 7;
 665                                         }
 666
 667                                         strcpy(cmd.parm.setup.phone, phone_number);
 668                                         /*
 669                                          * Switch to next number or back to start if at end of list.
 670                                          */
 671                                         if (!(lp->dial = (isdn_net_phone *) lp->dial->next)) {
 672                                                 lp->dial = lp->phone[1];
 673                                                 lp->dialretry++;
 674
 675                                                 if (lp->dialretry > lp->dialmax) {
 676                                                         if (lp->dialtimeout == 0) {
 677                                                                 lp->dialwait_timer = jiffies + lp->dialwait;
 678                                                                 lp->dialstarted = 0;
 679                                                                 isdn_net_unreachable(p->dev, NULL, "dial: tried all numbers dialmax times");
 680                                                         }
 681                                                         isdn_net_hangup(p->dev);
 682                                                         break;
 683                                                 }
 684                                         }
 685                                         sprintf(cmd.parm.setup.eazmsn, "%s",
 686                                                 isdn_map_eaz2msn(lp->msn, cmd.driver));
 687                                         i = isdn_dc2minor(lp->isdn_device, lp->isdn_channel);
 688                                         if (i >= 0) {
 689                                                 strcpy(dev->num[i], cmd.parm.setup.phone);
 690                                                 dev->usage[i] |= ISDN_USAGE_OUTGOING;
 691                                                 isdn_info_update();
 692                                         }
 693                                         printk(KERN_INFO "%s: dialing %d %s... %s\n", p->dev->name,
 694                                                lp->dialretry, cmd.parm.setup.phone,
 695                                                (cmd.parm.setup.si1 == 1) ? "DOV" : "");
 696                                         lp->dtimer = 0;
 697 #ifdef ISDN_DEBUG_NET_DIAL
 698                                         printk(KERN_DEBUG "dial: d=%d c=%d\n", lp->isdn_device,
 699                                                lp->isdn_channel);
 700 #endif
 701                                         isdn_command(&cmd);
 702                                 }
 703                                 lp->huptimer = 0;
 704                                 lp->outgoing = 1;
 705                                 if (lp->chargeint) {
 706                                         lp->hupflags |= ISDN_HAVECHARGE;
 707                                         lp->hupflags &= ~ISDN_WAITCHARGE;
 708                                 } else {
 709                                         lp->hupflags |= ISDN_WAITCHARGE;
 710                                         lp->hupflags &= ~ISDN_HAVECHARGE;
 711                                 }
 712                                 anymore = 1;
 713                                 lp->dialstate =
 714                                     (lp->cbdelay &&
 715                                      (lp->flags & ISDN_NET_CBOUT)) ? 12 : 4;
 716                                 break;
 717                         case 4:
 718                                 /* Wait for D-Channel-connect.
 719                                  * If timeout, switch back to state 3.
 720                                  * Dialmax-handling moved to state 3.
 721                                  */
 722                                 if (lp->dtimer++ > ISDN_TIMER_DTIMEOUT10)
 723                                         lp->dialstate = 3;
 724                                 anymore = 1;
 725                                 break;
 726                         case 5:
 727                                 /* Got D-Channel-Connect, send B-Channel-request */
 728                                 cmd.driver = lp->isdn_device;
 729                                 cmd.arg = lp->isdn_channel;
 730                                 cmd.command = ISDN_CMD_ACCEPTB;
 731                                 anymore = 1;
 732                                 lp->dtimer = 0;
 733                                 lp->dialstate++;
 734                                 isdn_command(&cmd);
 735                                 break;
 736                         case 6:
 737                                 /* Wait for B- or D-Channel-connect. If timeout,
 738                                  * switch back to state 3.
 739                                  */
 740 #ifdef ISDN_DEBUG_NET_DIAL
 741                                 printk(KERN_DEBUG "dialtimer2: %d\n", lp->dtimer);
 742 #endif
 743                                 if (lp->dtimer++ > ISDN_TIMER_DTIMEOUT10)
 744                                         lp->dialstate = 3;
 745                                 anymore = 1;
 746                                 break;
 747                         case 7:
 748                                 /* Got incoming Call, setup L2 and L3 protocols,
 749                                  * then wait for D-Channel-connect
 750                                  */
 751 #ifdef ISDN_DEBUG_NET_DIAL
 752                                 printk(KERN_DEBUG "dialtimer4: %d\n", lp->dtimer);
 753 #endif
 754                                 cmd.driver = lp->isdn_device;
 755                                 cmd.command = ISDN_CMD_SETL2;
 756                                 cmd.arg = lp->isdn_channel + (lp->l2_proto << 8);
 757                                 isdn_command(&cmd);
 758                                 cmd.driver = lp->isdn_device;
 759                                 cmd.command = ISDN_CMD_SETL3;
 760                                 cmd.arg = lp->isdn_channel + (lp->l3_proto << 8);
 761                                 isdn_command(&cmd);
 762                                 if (lp->dtimer++ > ISDN_TIMER_DTIMEOUT15)
 763                                         isdn_net_hangup(p->dev);
 764                                 else {
 765                                         anymore = 1;
 766                                         lp->dialstate++;
 767                                 }
 768                                 break;
 769                         case 9:
 770                                 /* Got incoming D-Channel-Connect, send B-Channel-request */
 771                                 cmd.driver = lp->isdn_device;
 772                                 cmd.arg = lp->isdn_channel;
 773                                 cmd.command = ISDN_CMD_ACCEPTB;
 774                                 isdn_command(&cmd);
 775                                 anymore = 1;
 776                                 lp->dtimer = 0;
 777                                 lp->dialstate++;
 778                                 break;
 779                         case 8:
 780                         case 10:
 781                                 /*  Wait for B- or D-channel-connect */
 782 #ifdef ISDN_DEBUG_NET_DIAL
 783                                 printk(KERN_DEBUG "dialtimer4: %d\n", lp->dtimer);
 784 #endif
 785                                 if (lp->dtimer++ > ISDN_TIMER_DTIMEOUT10)
 786                                         isdn_net_hangup(p->dev);
 787                                 else
 788                                         anymore = 1;
 789                                 break;
 790                         case 11:
 791                                 /* Callback Delay */
 792                                 if (lp->dtimer++ > lp->cbdelay)
 793                                         lp->dialstate = 1;
 794                                 anymore = 1;
 795                                 break;
 796                         case 12:
 797                                 /* Remote does callback. Hangup after cbdelay, then wait for incoming
 798                                  * call (in state 4).
 799                                  */
 800                                 if (lp->dtimer++ > lp->cbdelay)
 801                                 {
 802                                         printk(KERN_INFO "%s: hangup waiting for callback ...\n", p->dev->name);
 803                                         lp->dtimer = 0;
 804                                         lp->dialstate = 4;
 805                                         cmd.driver = lp->isdn_device;
 806                                         cmd.command = ISDN_CMD_HANGUP;
 807                                         cmd.arg = lp->isdn_channel;
 808                                         isdn_command(&cmd);
 809                                         isdn_all_eaz(lp->isdn_device, lp->isdn_channel);
 810                                 }
 811                                 anymore = 1;
 812                                 break;
 813                         default:
 814                                 printk(KERN_WARNING "isdn_net: Illegal dialstate %d for device %s\n",
 815                                        lp->dialstate, p->dev->name);
 816                 }
 817                 p = (isdn_net_dev *) p->next;
 818         }
 819         isdn_timer_ctrl(ISDN_TIMER_NETDIAL, anymore);
 820 }
 821
 822 /*
 823  * Perform hangup for a net-interface.
 824  */
 825 void
 826 isdn_net_hangup(struct net_device *d)
 827 {
 828         isdn_net_local *lp = (isdn_net_local *) netdev_priv(d);
 829         isdn_ctrl cmd;
 830 #ifdef CONFIG_ISDN_X25
 831         struct concap_proto *cprot = lp->netdev->cprot;
 832         struct concap_proto_ops *pops = cprot ? cprot->pops : NULL;
 833 #endif
 834
 835         if (lp->flags & ISDN_NET_CONNECTED) {
 836                 if (lp->slave != NULL) {
 837                         isdn_net_local *slp = ISDN_SLAVE_PRIV(lp);
 838                         if (slp->flags & ISDN_NET_CONNECTED) {
 839                                 printk(KERN_INFO
 840                                         "isdn_net: hang up slave %s before %s\n",
 841                                         lp->slave->name, d->name);
 842                                 isdn_net_hangup(lp->slave);
 843                         }
 844                 }
 845                 printk(KERN_INFO "isdn_net: local hangup %s\n", d->name);
 846 #ifdef CONFIG_ISDN_PPP
 847                 if (lp->p_encap == ISDN_NET_ENCAP_SYNCPPP)
 848                         isdn_ppp_free(lp);
 849 #endif
 850                 isdn_net_lp_disconnected(lp);
 851 #ifdef CONFIG_ISDN_X25
 852                 /* try if there are generic encap protocol
 853                    receiver routines and signal the closure of
 854                    the link */
 855                 if( pops && pops -> disconn_ind )
 856                   pops -> disconn_ind(cprot);
 857 #endif /* CONFIG_ISDN_X25 */
 858
 859                 cmd.driver = lp->isdn_device;
 860                 cmd.command = ISDN_CMD_HANGUP;
 861                 cmd.arg = lp->isdn_channel;
 862                 isdn_command(&cmd);
 863                 printk(KERN_INFO "%s: Chargesum is %d\n", d->name, lp->charge);
 864                 isdn_all_eaz(lp->isdn_device, lp->isdn_channel);
 865         }
 866         isdn_net_unbind_channel(lp);
 867 }
 868
 869 typedef struct {
 870         __be16 source;
 871         __be16 dest;
 872 } ip_ports;
 873
 874 static void
 875 isdn_net_log_skb(struct sk_buff * skb, isdn_net_local * lp)
 876 {
 877         /* hopefully, this was set correctly */
 878         const u_char *p = skb_network_header(skb);
 879         unsigned short proto = ntohs(skb->protocol);
 880         int data_ofs;
 881         ip_ports *ipp;
 882         char addinfo[100];
 883
 884         addinfo[0] = '\0';
 885         /* This check stolen from 2.1.72 dev_queue_xmit_nit() */
 886         if (p < skb->data || skb->network_header >= skb->tail) {
 887                 /* fall back to old isdn_net_log_packet method() */
 888                 char * buf = skb->data;
 889
 890                 printk(KERN_DEBUG "isdn_net: protocol %04x is buggy, dev %s\n", skb->protocol, lp->netdev->dev->name);
 891                 p = buf;
 892                 proto = ETH_P_IP;
 893                 switch (lp->p_encap) {
 894                         case ISDN_NET_ENCAP_IPTYP:
 895                                 proto = ntohs(*(__be16 *)&buf[0]);
 896                                 p = &buf[2];
 897                                 break;
 898                         case ISDN_NET_ENCAP_ETHER:
 899                                 proto = ntohs(*(__be16 *)&buf[12]);
 900                                 p = &buf[14];
 901                                 break;
 902                         case ISDN_NET_ENCAP_CISCOHDLC:
 903                                 proto = ntohs(*(__be16 *)&buf[2]);
 904                                 p = &buf[4];
 905                                 break;
 906 #ifdef CONFIG_ISDN_PPP
 907                         case ISDN_NET_ENCAP_SYNCPPP:
 908                                 proto = ntohs(skb->protocol);
 909                                 p = &buf[IPPP_MAX_HEADER];
 910                                 break;
 911 #endif
 912                 }
 913         }
 914         data_ofs = ((p[0] & 15) * 4);
 915         switch (proto) {
 916                 case ETH_P_IP:
 917                         switch (p[9]) {
 918                                 case 1:
 919                                         strcpy(addinfo, " ICMP");
 920                                         break;
 921                                 case 2:
 922                                         strcpy(addinfo, " IGMP");
 923                                         break;
 924                                 case 4:
 925                                         strcpy(addinfo, " IPIP");
 926                                         break;
 927                                 case 6:
 928                                         ipp = (ip_ports *) (&p[data_ofs]);
 929                                         sprintf(addinfo, " TCP, port: %d -> %d", ntohs(ipp->source),
 930                                                 ntohs(ipp->dest));
 931                                         break;
 932                                 case 8:
 933                                         strcpy(addinfo, " EGP");
 934                                         break;
 935                                 case 12:
 936                                         strcpy(addinfo, " PUP");
 937                                         break;
 938                                 case 17:
 939                                         ipp = (ip_ports *) (&p[data_ofs]);
 940                                         sprintf(addinfo, " UDP, port: %d -> %d", ntohs(ipp->source),
 941                                                 ntohs(ipp->dest));
 942                                         break;
 943                                 case 22:
 944                                         strcpy(addinfo, " IDP");
 945                                         break;
 946                         }
 947                         printk(KERN_INFO "OPEN: %pI4 -> %pI4%s\n",
 948                                p + 12, p + 16, addinfo);
 949                         break;
 950                 case ETH_P_ARP:
 951                         printk(KERN_INFO "OPEN: ARP %pI4 -> *.*.*.* ?%pI4\n",
 952                                p + 14, p + 24);
 953                         break;
 954         }
 955 }
 956
 957 /*
 958  * this function is used to send supervisory data, i.e. data which was
 959  * not received from the network layer, but e.g. frames from ipppd, CCP
 960  * reset frames etc.
 961  */
 962 void isdn_net_write_super(isdn_net_local *lp, struct sk_buff *skb)
 963 {
 964         if (in_irq()) {
 965                 // we can't grab the lock from irq context,
 966                 // so we just queue the packet
 967                 skb_queue_tail(&lp->super_tx_queue, skb);
 968                 schedule_work(&lp->tqueue);
 969                 return;
 970         }
 971
 972         spin_lock_bh(&lp->xmit_lock);
 973         if (!isdn_net_lp_busy(lp)) {
 974                 isdn_net_writebuf_skb(lp, skb);
 975         } else {
 976                 skb_queue_tail(&lp->super_tx_queue, skb);
 977         }
 978         spin_unlock_bh(&lp->xmit_lock);
 979 }
 980
 981 /*
 982  * called from tq_immediate
 983  */
 984 static void isdn_net_softint(struct work_struct *work)
 985 {
 986         isdn_net_local *lp = container_of(work, isdn_net_local, tqueue);
 987         struct sk_buff *skb;
 988
 989         spin_lock_bh(&lp->xmit_lock);
 990         while (!isdn_net_lp_busy(lp)) {
 991                 skb = skb_dequeue(&lp->super_tx_queue);
 992                 if (!skb)
 993                         break;
 994                 isdn_net_writebuf_skb(lp, skb);
 995         }
 996         spin_unlock_bh(&lp->xmit_lock);
 997 }
 998
 999 /*
1000  * all frames sent from the (net) LL to a HL driver should go via this function
1001  * it's serialized by the caller holding the lp->xmit_lock spinlock
1002  */
1003 void isdn_net_writebuf_skb(isdn_net_local *lp, struct sk_buff *skb)
1004 {
1005         int ret;
1006         int len = skb->len;     /* save len */
1007
1008         /* before obtaining the lock the caller should have checked that
1009            the lp isn't busy */
1010         if (isdn_net_lp_busy(lp)) {
1011                 printk("isdn BUG at %s:%d!\n", __FILE__, __LINE__);
1012                 goto error;
1013         }
1014
1015         if (!(lp->flags & ISDN_NET_CONNECTED)) {
1016                 printk("isdn BUG at %s:%d!\n", __FILE__, __LINE__);
1017                 goto error;
1018         }
1019         ret = isdn_writebuf_skb_stub(lp->isdn_device, lp->isdn_channel, 1, skb);
1020         if (ret != len) {
1021                 /* we should never get here */
1022                 printk(KERN_WARNING "%s: HL driver queue full\n", lp->netdev->dev->name);
1023                 goto error;
1024         }
1025
1026         lp->transcount += len;
1027         isdn_net_inc_frame_cnt(lp);
1028         return;
1029
1030  error:
1031         dev_kfree_skb(skb);
1032         lp->stats.tx_errors++;
1033
1034 }
1035
1036
1037 /*
1038  *  Helper function for isdn_net_start_xmit.
1039  *  When called, the connection is already established.
1040  *  Based on cps-calculation, check if device is overloaded.
1041  *  If so, and if a slave exists, trigger dialing for it.
1042  *  If any slave is online, deliver packets using a simple round robin
1043  *  scheme.
1044  *
1045  *  Return: 0 on success, !0 on failure.
1046  */
1047
1048 static int
1049 isdn_net_xmit(struct net_device *ndev, struct sk_buff *skb)
1050 {
1051         isdn_net_dev *nd;
1052         isdn_net_local *slp;
1053         isdn_net_local *lp = (isdn_net_local *) netdev_priv(ndev);
1054         int retv = NETDEV_TX_OK;
1055
1056         if (((isdn_net_local *) netdev_priv(ndev))->master) {
1057                 printk("isdn BUG at %s:%d!\n", __FILE__, __LINE__);
1058                 dev_kfree_skb(skb);
1059                 return NETDEV_TX_OK;
1060         }
1061
1062         /* For the other encaps the header has already been built */
1063 #ifdef CONFIG_ISDN_PPP
1064         if (lp->p_encap == ISDN_NET_ENCAP_SYNCPPP) {
1065                 return isdn_ppp_xmit(skb, ndev);
1066         }
1067 #endif
1068         nd = ((isdn_net_local *) netdev_priv(ndev))->netdev;
1069         lp = isdn_net_get_locked_lp(nd);
1070         if (!lp) {
1071                 printk(KERN_WARNING "%s: all channels busy - requeuing!\n", ndev->name);
1072                 return NETDEV_TX_BUSY;
1073         }
1074         /* we have our lp locked from now on */
1075
1076         /* Reset hangup-timeout */
1077         lp->huptimer = 0; // FIXME?
1078         isdn_net_writebuf_skb(lp, skb);
1079         spin_unlock_bh(&lp->xmit_lock);
1080
1081         /* the following stuff is here for backwards compatibility.
1082          * in future, start-up and hangup of slaves (based on current load)
1083          * should move to userspace and get based on an overall cps
1084          * calculation
1085          */
1086         if (lp->cps > lp->triggercps) {
1087                 if (lp->slave) {
1088                         if (!lp->sqfull) {
1089                                 /* First time overload: set timestamp only */
1090                                 lp->sqfull = 1;
1091                                 lp->sqfull_stamp = jiffies;
1092                         } else {
1093                                 /* subsequent overload: if slavedelay exceeded, start dialing */
1094                                 if (time_after(jiffies, lp->sqfull_stamp + lp->slavedelay)) {
1095                                         slp = ISDN_SLAVE_PRIV(lp);
1096                                         if (!(slp->flags & ISDN_NET_CONNECTED)) {
1097                                                 isdn_net_force_dial_lp(ISDN_SLAVE_PRIV(lp));
1098                                         }
1099                                 }
1100                         }
1101                 }
1102         } else {
1103                 if (lp->sqfull && time_after(jiffies, lp->sqfull_stamp + lp->slavedelay + (10 * HZ))) {
1104                         lp->sqfull = 0;
1105                 }
1106                 /* this is a hack to allow auto-hangup for slaves on moderate loads */
1107                 nd->queue = nd->local;
1108         }
1109
1110         return retv;
1111
1112 }
1113
1114 static void
1115 isdn_net_adjust_hdr(struct sk_buff *skb, struct net_device *dev)
1116 {
1117         isdn_net_local *lp = (isdn_net_local *) netdev_priv(dev);
1118         if (!skb)
1119                 return;
1120         if (lp->p_encap == ISDN_NET_ENCAP_ETHER) {
1121                 const int pullsize = skb_network_offset(skb) - ETH_HLEN;
1122                 if (pullsize > 0) {
1123                         printk(KERN_DEBUG "isdn_net: Pull junk %d\n", pullsize);
1124                         skb_pull(skb, pullsize);
1125                 }
1126         }
1127 }
1128
1129
1130 static void isdn_net_tx_timeout(struct net_device * ndev)
1131 {
1132         isdn_net_local *lp = (isdn_net_local *) netdev_priv(ndev);
1133
1134         printk(KERN_WARNING "isdn_tx_timeout dev %s dialstate %d\n", ndev->name, lp->dialstate);
1135         if (!lp->dialstate){
1136                 lp->stats.tx_errors++;
1137                 /*
1138                  * There is a certain probability that this currently
1139                  * works at all because if we always wake up the interface,
1140                  * then upper layer will try to send the next packet
1141                  * immediately. And then, the old clean_up logic in the
1142                  * driver will hopefully continue to work as it used to do.
1143                  *
1144                  * This is rather primitive right know, we better should
1145                  * clean internal queues here, in particular for multilink and
1146                  * ppp, and reset HL driver's channel, too.   --HE
1147                  *
1148                  * actually, this may not matter at all, because ISDN hardware
1149                  * should not see transmitter hangs at all IMO
1150                  * changed KERN_DEBUG to KERN_WARNING to find out if this is
1151                  * ever called   --KG
1152                  */
1153         }
1154         ndev->trans_start = jiffies;
1155         netif_wake_queue(ndev);
1156 }
1157
1158 /*
1159  * Try sending a packet.
1160  * If this interface isn't connected to a ISDN-Channel, find a free channel,
1161  * and start dialing.
1162  */
1163 static int
1164 isdn_net_start_xmit(struct sk_buff *skb, struct net_device *ndev)
1165 {
1166         isdn_net_local *lp = (isdn_net_local *) netdev_priv(ndev);
1167 #ifdef CONFIG_ISDN_X25
1168         struct concap_proto * cprot = lp -> netdev -> cprot;
1169 /* At this point hard_start_xmit() passes control to the encapsulation
1170    protocol (if present).
1171    For X.25 auto-dialing is completly bypassed because:
1172    - It does not conform with the semantics of a reliable datalink
1173      service as needed by X.25 PLP.
1174    - I don't want that the interface starts dialing when the network layer
1175      sends a message which requests to disconnect the lapb link (or if it
1176      sends any other message not resulting in data transmission).
1177    Instead, dialing will be initiated by the encapsulation protocol entity
1178    when a dl_establish request is received from the upper layer.
1179 */
1180         if (cprot && cprot -> pops) {
1181                 int ret = cprot -> pops -> encap_and_xmit ( cprot , skb);
1182
1183                 if (ret)
1184                         netif_stop_queue(ndev);
1185                 return ret;
1186         } else
1187 #endif
1188         /* auto-dialing xmit function */
1189         {
1190 #ifdef ISDN_DEBUG_NET_DUMP
1191                 u_char *buf;
1192 #endif
1193                 isdn_net_adjust_hdr(skb, ndev);
1194 #ifdef ISDN_DEBUG_NET_DUMP
1195                 buf = skb->data;
1196                 isdn_dumppkt("S:", buf, skb->len, 40);
1197 #endif
1198
1199                 if (!(lp->flags & ISDN_NET_CONNECTED)) {
1200                         int chi;
1201                         /* only do autodial if allowed by config */
1202                         if (!(ISDN_NET_DIALMODE(*lp) == ISDN_NET_DM_AUTO)) {
1203                                 isdn_net_unreachable(ndev, skb, "dial rejected: interface not in dialmode `auto'");
1204                                 dev_kfree_skb(skb);
1205                                 return NETDEV_TX_OK;
1206                         }
1207                         if (lp->phone[1]) {
1208                                 ulong flags;
1209
1210                                 if(lp->dialwait_timer <= 0)
1211                                         if(lp->dialstarted > 0 && lp->dialtimeout > 0 && time_before(jiffies, lp->dialstarted + lp->dialtimeout + lp->dialwait))
1212                                                 lp->dialwait_timer = lp->dialstarted + lp->dialtimeout + lp->dialwait;
1213
1214                                 if(lp->dialwait_timer > 0) {
1215                                         if(time_before(jiffies, lp->dialwait_timer)) {
1216                                                 isdn_net_unreachable(ndev, skb, "dial rejected: retry-time not reached");
1217                                                 dev_kfree_skb(skb);
1218                                                 return NETDEV_TX_OK;
1219                                         } else
1220                                                 lp->dialwait_timer = 0;
1221                                 }
1222                                 /* Grab a free ISDN-Channel */
1223                                 spin_lock_irqsave(&dev->lock, flags);
1224                                 if (((chi =
1225                                      isdn_get_free_channel(
1226                                                         ISDN_USAGE_NET,
1227                                                         lp->l2_proto,
1228                                                         lp->l3_proto,
1229                                                         lp->pre_device,
1230                                                         lp->pre_channel,
1231                                                         lp->msn)
1232                                                         ) < 0) &&
1233                                         ((chi =
1234                                      isdn_get_free_channel(
1235                                                         ISDN_USAGE_NET,
1236                                                         lp->l2_proto,
1237                                                         lp->l3_proto,
1238                                                         lp->pre_device,
1239                                                         lp->pre_channel^1,
1240                                                         lp->msn)
1241                                                         ) < 0)) {
1242                                         spin_unlock_irqrestore(&dev->lock, flags);
1243                                         isdn_net_unreachable(ndev, skb,
1244                                                            "No channel");
1245                                         dev_kfree_skb(skb);
1246                                         return NETDEV_TX_OK;
1247                                 }
1248                                 /* Log packet, which triggered dialing */
1249                                 if (dev->net_verbose)
1250                                         isdn_net_log_skb(skb, lp);
1251                                 lp->dialstate = 1;
1252                                 /* Connect interface with channel */
1253                                 isdn_net_bind_channel(lp, chi);
1254 #ifdef CONFIG_ISDN_PPP
1255                                 if (lp->p_encap == ISDN_NET_ENCAP_SYNCPPP) {
1256                                         /* no 'first_skb' handling for syncPPP */
1257                                         if (isdn_ppp_bind(lp) < 0) {
1258                                                 dev_kfree_skb(skb);
1259                                                 isdn_net_unbind_channel(lp);
1260                                                 spin_unlock_irqrestore(&dev->lock, flags);
1261                                                 return NETDEV_TX_OK;    /* STN (skb to nirvana) ;) */
1262                                         }
1263 #ifdef CONFIG_IPPP_FILTER
1264                                         if (isdn_ppp_autodial_filter(skb, lp)) {
1265                                                 isdn_ppp_free(lp);
1266                                                 isdn_net_unbind_channel(lp);
1267                                                 spin_unlock_irqrestore(&dev->lock, flags);
1268                                                 isdn_net_unreachable(ndev, skb, "dial rejected: packet filtered");
1269                                                 dev_kfree_skb(skb);
1270                                                 return NETDEV_TX_OK;
1271                                         }
1272 #endif
1273                                         spin_unlock_irqrestore(&dev->lock, flags);
1274                                         isdn_net_dial();        /* Initiate dialing */
1275                                         netif_stop_queue(ndev);
1276                                         return NETDEV_TX_BUSY;  /* let upper layer requeue skb packet */
1277                                 }
1278 #endif
1279                                 /* Initiate dialing */
1280                                 spin_unlock_irqrestore(&dev->lock, flags);
1281                                 isdn_net_dial();
1282                                 isdn_net_device_stop_queue(lp);
1283                                 return NETDEV_TX_BUSY;
1284                         } else {
1285                                 isdn_net_unreachable(ndev, skb,
1286                                                      "No phone number");
1287                                 dev_kfree_skb(skb);
1288                                 return NETDEV_TX_OK;
1289                         }
1290                 } else {
1291                         /* Device is connected to an ISDN channel */
1292                         ndev->trans_start = jiffies;
1293                         if (!lp->dialstate) {
1294                                 /* ISDN connection is established, try sending */
1295                                 int ret;
1296                                 ret = (isdn_net_xmit(ndev, skb));
1297                                 if(ret) netif_stop_queue(ndev);
1298                                 return ret;
1299                         } else
1300                                 netif_stop_queue(ndev);
1301                 }
1302         }
1303         return NETDEV_TX_BUSY;
1304 }
1305
1306 /*
1307  * Shutdown a net-interface.
1308  */
1309 static int
1310 isdn_net_close(struct net_device *dev)
1311 {
1312         struct net_device *p;
1313 #ifdef CONFIG_ISDN_X25
1314         struct concap_proto * cprot =
1315                 ((isdn_net_local *) netdev_priv(dev))->netdev->cprot;
1316         /* printk(KERN_DEBUG "isdn_net_close %s\n" , dev-> name ); */
1317 #endif
1318
1319 #ifdef CONFIG_ISDN_X25
1320         if( cprot && cprot -> pops ) cprot -> pops -> close( cprot );
1321 #endif
1322         netif_stop_queue(dev);
1323         p = MASTER_TO_SLAVE(dev);
1324         if (p) {
1325                 /* If this interface has slaves, stop them also */
1326                 while (p) {
1327 #ifdef CONFIG_ISDN_X25
1328                         cprot = ((isdn_net_local *) netdev_priv(p))
1329                                 -> netdev -> cprot;
1330                         if( cprot && cprot -> pops )
1331                                 cprot -> pops -> close( cprot );
1332 #endif
1333                         isdn_net_hangup(p);
1334                         p = MASTER_TO_SLAVE(p);
1335                 }
1336         }
1337         isdn_net_hangup(dev);
1338         isdn_unlock_drivers();
1339         return 0;
1340 }
1341
1342 /*
1343  * Get statistics
1344  */
1345 static struct net_device_stats *
1346 isdn_net_get_stats(struct net_device *dev)
1347 {
1348         isdn_net_local *lp = (isdn_net_local *) netdev_priv(dev);
1349         return &lp->stats;
1350 }
1351
1352 /*      This is simply a copy from std. eth.c EXCEPT we pull ETH_HLEN
1353  *      instead of dev->hard_header_len off. This is done because the
1354  *      lowlevel-driver has already pulled off its stuff when we get
1355  *      here and this routine only gets called with p_encap == ETHER.
1356  *      Determine the packet's protocol ID. The rule here is that we
1357  *      assume 802.3 if the type field is short enough to be a length.
1358  *      This is normal practice and works for any 'now in use' protocol.
1359  */
1360
1361 static __be16
1362 isdn_net_type_trans(struct sk_buff *skb, struct net_device *dev)
1363 {
1364         struct ethhdr *eth;
1365         unsigned char *rawp;
1366
1367         skb_reset_mac_header(skb);
1368         skb_pull(skb, ETH_HLEN);
1369         eth = eth_hdr(skb);
1370
1371         if (*eth->h_dest & 1) {
1372                 if (memcmp(eth->h_dest, dev->broadcast, ETH_ALEN) == 0)
1373                         skb->pkt_type = PACKET_BROADCAST;
1374                 else
1375                         skb->pkt_type = PACKET_MULTICAST;
1376         }
1377         /*
1378          *      This ALLMULTI check should be redundant by 1.4
1379          *      so don't forget to remove it.
1380          */
1381
1382         else if (dev->flags & (IFF_PROMISC /*| IFF_ALLMULTI*/)) {
1383                 if (memcmp(eth->h_dest, dev->dev_addr, ETH_ALEN))
1384                         skb->pkt_type = PACKET_OTHERHOST;
1385         }
1386         if (ntohs(eth->h_proto) >= 1536)
1387                 return eth->h_proto;
1388
1389         rawp = skb->data;
1390
1391         /*
1392          *      This is a magic hack to spot IPX packets. Older Novell breaks
1393          *      the protocol design and runs IPX over 802.3 without an 802.2 LLC
1394          *      layer. We look for FFFF which isn't a used 802.2 SSAP/DSAP. This
1395          *      won't work for fault tolerant netware but does for the rest.
1396          */
1397         if (*(unsigned short *) rawp == 0xFFFF)
1398                 return htons(ETH_P_802_3);
1399         /*
1400          *      Real 802.2 LLC
1401          */
1402         return htons(ETH_P_802_2);
1403 }
1404
1405
1406 /*
1407  * CISCO HDLC keepalive specific stuff
1408  */
1409 static struct sk_buff*
1410 isdn_net_ciscohdlck_alloc_skb(isdn_net_local *lp, int len)
1411 {
1412         unsigned short hl = dev->drv[lp->isdn_device]->interface->hl_hdrlen;
1413         struct sk_buff *skb;
1414
1415         skb = alloc_skb(hl + len, GFP_ATOMIC);
1416         if (skb)
1417                 skb_reserve(skb, hl);
1418         else
1419                 printk("isdn out of mem at %s:%d!\n", __FILE__, __LINE__);
1420         return skb;
1421 }
1422
1423 /* cisco hdlck device private ioctls */
1424 static int
1425 isdn_ciscohdlck_dev_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd)
1426 {
1427         isdn_net_local *lp = (isdn_net_local *) netdev_priv(dev);
1428         unsigned long len = 0;
1429         unsigned long expires = 0;
1430         int tmp = 0;
1431         int period = lp->cisco_keepalive_period;
1432         s8 debserint = lp->cisco_debserint;
1433         int rc = 0;
1434
1435         if (lp->p_encap != ISDN_NET_ENCAP_CISCOHDLCK)
1436                 return -EINVAL;
1437
1438         switch (cmd) {
1439                 /* get/set keepalive period */
1440                 case SIOCGKEEPPERIOD:
1441                         len = (unsigned long)sizeof(lp->cisco_keepalive_period);
1442                         if (copy_to_user(ifr->ifr_data,
1443                                 &lp->cisco_keepalive_period, len))
1444                                 rc = -EFAULT;
1445                         break;
1446                 case SIOCSKEEPPERIOD:
1447                         tmp = lp->cisco_keepalive_period;
1448                         len = (unsigned long)sizeof(lp->cisco_keepalive_period);
1449                         if (copy_from_user(&period, ifr->ifr_data, len))
1450                                 rc = -EFAULT;
1451                         if ((period > 0) && (period <= 32767))
1452                                 lp->cisco_keepalive_period = period;
1453                         else
1454                                 rc = -EINVAL;
1455                         if (!rc && (tmp != lp->cisco_keepalive_period)) {
1456                                 expires = (unsigned long)(jiffies +
1457                                         lp->cisco_keepalive_period * HZ);
1458                                 mod_timer(&lp->cisco_timer, expires);
1459                                 printk(KERN_INFO "%s: Keepalive period set "
1460                                         "to %d seconds.\n",
1461                                         dev->name, lp->cisco_keepalive_period);
1462                         }
1463                         break;
1464
1465                 /* get/set debugging */
1466                 case SIOCGDEBSERINT:
1467                         len = (unsigned long)sizeof(lp->cisco_debserint);
1468                         if (copy_to_user(ifr->ifr_data,
1469                                 &lp->cisco_debserint, len))
1470                                 rc = -EFAULT;
1471                         break;
1472                 case SIOCSDEBSERINT:
1473                         len = (unsigned long)sizeof(lp->cisco_debserint);
1474                         if (copy_from_user(&debserint,
1475                                 ifr->ifr_data, len))
1476                                 rc = -EFAULT;
1477                         if ((debserint >= 0) && (debserint <= 64))
1478                                 lp->cisco_debserint = debserint;
1479                         else
1480                                 rc = -EINVAL;
1481                         break;
1482
1483                 default:
1484                         rc = -EINVAL;
1485                         break;
1486         }
1487         return (rc);
1488 }
1489
1490
1491 static int isdn_net_ioctl(struct net_device *dev,
1492                           struct ifreq *ifr, int cmd)
1493 {
1494         isdn_net_local *lp = (isdn_net_local *) netdev_priv(dev);
1495
1496         switch (lp->p_encap) {
1497 #ifdef CONFIG_ISDN_PPP
1498         case ISDN_NET_ENCAP_SYNCPPP:
1499                 return isdn_ppp_dev_ioctl(dev, ifr, cmd);
1500 #endif
1501         case ISDN_NET_ENCAP_CISCOHDLCK:
1502                 return isdn_ciscohdlck_dev_ioctl(dev, ifr, cmd);
1503         default:
1504                 return -EINVAL;
1505         }
1506 }
1507
1508 /* called via cisco_timer.function */
1509 static void
1510 isdn_net_ciscohdlck_slarp_send_keepalive(unsigned long data)
1511 {
1512         isdn_net_local *lp = (isdn_net_local *) data;
1513         struct sk_buff *skb;
1514         unsigned char *p;
1515         unsigned long last_cisco_myseq = lp->cisco_myseq;
1516         int myseq_diff = 0;
1517
1518         if (!(lp->flags & ISDN_NET_CONNECTED) || lp->dialstate) {
1519                 printk("isdn BUG at %s:%d!\n", __FILE__, __LINE__);
1520                 return;
1521         }
1522         lp->cisco_myseq++;
1523
1524         myseq_diff = (lp->cisco_myseq - lp->cisco_mineseen);
1525         if ((lp->cisco_line_state) && ((myseq_diff >= 3)||(myseq_diff <= -3))) {
1526                 /* line up -> down */
1527                 lp->cisco_line_state = 0;
1528                 printk (KERN_WARNING
1529                                 "UPDOWN: Line protocol on Interface %s,"
1530                                 " changed state to down\n", lp->netdev->dev->name);
1531                 /* should stop routing higher-level data accross */
1532         } else if ((!lp->cisco_line_state) &&
1533                 (myseq_diff >= 0) && (myseq_diff <= 2)) {
1534                 /* line down -> up */
1535                 lp->cisco_line_state = 1;
1536                 printk (KERN_WARNING
1537                                 "UPDOWN: Line protocol on Interface %s,"
1538                                 " changed state to up\n", lp->netdev->dev->name);
1539                 /* restart routing higher-level data accross */
1540         }
1541
1542         if (lp->cisco_debserint)
1543                 printk (KERN_DEBUG "%s: HDLC "
1544                         "myseq %lu, mineseen %lu%c, yourseen %lu, %s\n",
1545                         lp->netdev->dev->name, last_cisco_myseq, lp->cisco_mineseen,
1546                         ((last_cisco_myseq == lp->cisco_mineseen) ? '*' : 040),
1547                         lp->cisco_yourseq,
1548                         ((lp->cisco_line_state) ? "line up" : "line down"));
1549
1550         skb = isdn_net_ciscohdlck_alloc_skb(lp, 4 + 14);
1551         if (!skb)
1552                 return;
1553
1554         p = skb_put(skb, 4 + 14);
1555
1556         /* cisco header */
1557         *(u8 *)(p + 0) = CISCO_ADDR_UNICAST;
1558         *(u8 *)(p + 1) = CISCO_CTRL;
1559         *(__be16 *)(p + 2) = cpu_to_be16(CISCO_TYPE_SLARP);
1560
1561         /* slarp keepalive */
1562         *(__be32 *)(p +  4) = cpu_to_be32(CISCO_SLARP_KEEPALIVE);
1563         *(__be32 *)(p +  8) = cpu_to_be32(lp->cisco_myseq);
1564         *(__be32 *)(p + 12) = cpu_to_be32(lp->cisco_yourseq);
1565         *(__be16 *)(p + 16) = cpu_to_be16(0xffff); // reliablity, always 0xffff
1566         p += 18;
1567
1568         isdn_net_write_super(lp, skb);
1569
1570         lp->cisco_timer.expires = jiffies + lp->cisco_keepalive_period * HZ;
1571
1572         add_timer(&lp->cisco_timer);
1573 }
1574
1575 static void
1576 isdn_net_ciscohdlck_slarp_send_request(isdn_net_local *lp)
1577 {
1578         struct sk_buff *skb;
1579         unsigned char *p;
1580
1581         skb = isdn_net_ciscohdlck_alloc_skb(lp, 4 + 14);
1582         if (!skb)
1583                 return;
1584
1585         p = skb_put(skb, 4 + 14);
1586
1587         /* cisco header */
1588         *(u8 *)(p + 0) = CISCO_ADDR_UNICAST;
1589         *(u8 *)(p + 1) = CISCO_CTRL;
1590         *(__be16 *)(p + 2) = cpu_to_be16(CISCO_TYPE_SLARP);
1591
1592         /* slarp request */
1593         *(__be32 *)(p +  4) = cpu_to_be32(CISCO_SLARP_REQUEST);
1594         *(__be32 *)(p +  8) = cpu_to_be32(0); // address
1595         *(__be32 *)(p + 12) = cpu_to_be32(0); // netmask
1596         *(__be16 *)(p + 16) = cpu_to_be16(0); // unused
1597         p += 18;
1598
1599         isdn_net_write_super(lp, skb);
1600 }
1601
1602 static void
1603 isdn_net_ciscohdlck_connected(isdn_net_local *lp)
1604 {
1605         lp->cisco_myseq = 0;
1606         lp->cisco_mineseen = 0;
1607         lp->cisco_yourseq = 0;
1608         lp->cisco_keepalive_period = ISDN_TIMER_KEEPINT;
1609         lp->cisco_last_slarp_in = 0;
1610         lp->cisco_line_state = 0;
1611         lp->cisco_debserint = 0;
1612
1613         /* send slarp request because interface/seq.no.s reset */
1614         isdn_net_ciscohdlck_slarp_send_request(lp);
1615
1616         init_timer(&lp->cisco_timer);
1617         lp->cisco_timer.data = (unsigned long) lp;
1618         lp->cisco_timer.function = isdn_net_ciscohdlck_slarp_send_keepalive;
1619         lp->cisco_timer.expires = jiffies + lp->cisco_keepalive_period * HZ;
1620         add_timer(&lp->cisco_timer);
1621 }
1622
1623 static void
1624 isdn_net_ciscohdlck_disconnected(isdn_net_local *lp)
1625 {
1626         del_timer(&lp->cisco_timer);
1627 }
1628
1629 static void
1630 isdn_net_ciscohdlck_slarp_send_reply(isdn_net_local *lp)
1631 {
1632         struct sk_buff *skb;
1633         unsigned char *p;
1634         struct in_device *in_dev = NULL;
1635         __be32 addr = 0;                /* local ipv4 address */
1636         __be32 mask = 0;                /* local netmask */
1637
1638         if ((in_dev = lp->netdev->dev->ip_ptr) != NULL) {
1639                 /* take primary(first) address of interface */
1640                 struct in_ifaddr *ifa = in_dev->ifa_list;
1641                 if (ifa != NULL) {
1642                         addr = ifa->ifa_local;
1643                         mask = ifa->ifa_mask;
1644                 }
1645         }
1646
1647         skb = isdn_net_ciscohdlck_alloc_skb(lp, 4 + 14);
1648         if (!skb)
1649                 return;
1650
1651         p = skb_put(skb, 4 + 14);
1652
1653         /* cisco header */
1654         *(u8 *)(p + 0) = CISCO_ADDR_UNICAST;
1655         *(u8 *)(p + 1) = CISCO_CTRL;
1656         *(__be16 *)(p + 2) = cpu_to_be16(CISCO_TYPE_SLARP);
1657
1658         /* slarp reply, send own ip/netmask; if values are nonsense remote
1659          * should think we are unable to provide it with an address via SLARP */
1660         *(__be32 *)(p +  4) = cpu_to_be32(CISCO_SLARP_REPLY);
1661         *(__be32 *)(p +  8) = addr; // address
1662         *(__be32 *)(p + 12) = mask; // netmask
1663         *(__be16 *)(p + 16) = cpu_to_be16(0); // unused
1664         p += 18;
1665
1666         isdn_net_write_super(lp, skb);
1667 }
1668
1669 static void
1670 isdn_net_ciscohdlck_slarp_in(isdn_net_local *lp, struct sk_buff *skb)
1671 {
1672         unsigned char *p;
1673         int period;
1674         u32 code;
1675         u32 my_seq;
1676         u32 your_seq;
1677         __be32 local;
1678         __be32 *addr, *mask;
1679         u16 unused;
1680
1681         if (skb->len < 14)
1682                 return;
1683
1684         p = skb->data;
1685         code = be32_to_cpup((__be32 *)p);
1686         p += 4;
1687
1688         switch (code) {
1689         case CISCO_SLARP_REQUEST:
1690                 lp->cisco_yourseq = 0;
1691                 isdn_net_ciscohdlck_slarp_send_reply(lp);
1692                 break;
1693         case CISCO_SLARP_REPLY:
1694                 addr = (__be32 *)p;
1695                 mask = (__be32 *)(p + 4);
1696                 if (*mask != cpu_to_be32(0xfffffffc))
1697                         goto slarp_reply_out;
1698                 if ((*addr & cpu_to_be32(3)) == cpu_to_be32(0) ||
1699                     (*addr & cpu_to_be32(3)) == cpu_to_be32(3))
1700                         goto slarp_reply_out;
1701                 local = *addr ^ cpu_to_be32(3);
1702                 printk(KERN_INFO "%s: got slarp reply: remote ip: %pI4, local ip: %pI4 mask: %pI4\n",
1703                        lp->netdev->dev->name, addr, &local, mask);
1704                 break;
1705   slarp_reply_out:
1706                 printk(KERN_INFO "%s: got invalid slarp reply (%pI4/%pI4) - ignored\n",
1707                        lp->netdev->dev->name, addr, mask);
1708                 break;
1709         case CISCO_SLARP_KEEPALIVE:
1710                 period = (int)((jiffies - lp->cisco_last_slarp_in
1711                                 + HZ/2 - 1) / HZ);
1712                 if (lp->cisco_debserint &&
1713                                 (period != lp->cisco_keepalive_period) &&
1714                                 lp->cisco_last_slarp_in) {
1715                         printk(KERN_DEBUG "%s: Keepalive period mismatch - "
1716                                 "is %d but should be %d.\n",
1717                                 lp->netdev->dev->name, period,
1718                                 lp->cisco_keepalive_period);
1719                 }
1720                 lp->cisco_last_slarp_in = jiffies;
1721                 my_seq = be32_to_cpup((__be32 *)(p + 0));
1722                 your_seq = be32_to_cpup((__be32 *)(p + 4));
1723                 unused = be16_to_cpup((__be16 *)(p + 8));
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 = (isdn_net_local *) 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 = (isdn_net_local *) 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) > 8)
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) > 8)
2933                                 strcpy(cfg->master, "too-long");
2934                         strcpy(cfg->master, lp->master->name);
2935                 } else
2936                         cfg->master[0] = '\0';
2937                 return 0;
2938         }
2939         return -ENODEV;
2940 }
2941
2942 /*
2943  * Add a phone-number to an interface.
2944  */
2945 int
2946 isdn_net_addphone(isdn_net_ioctl_phone * phone)
2947 {
2948         isdn_net_dev *p = isdn_net_findif(phone->name);
2949         isdn_net_phone *n;
2950
2951         if (p) {
2952                 if (!(n = kmalloc(sizeof(isdn_net_phone), GFP_KERNEL)))
2953                         return -ENOMEM;
2954                 strlcpy(n->num, phone->phone, sizeof(n->num));
2955                 n->next = p->local->phone[phone->outgoing & 1];
2956                 p->local->phone[phone->outgoing & 1] = n;
2957                 return 0;
2958         }
2959         return -ENODEV;
2960 }
2961
2962 /*
2963  * Copy a string of all phone-numbers of an interface to user space.
2964  * This might sleep and must be called with the isdn semaphore down.
2965  */
2966 int
2967 isdn_net_getphones(isdn_net_ioctl_phone * phone, char __user *phones)
2968 {
2969         isdn_net_dev *p = isdn_net_findif(phone->name);
2970         int inout = phone->outgoing & 1;
2971         int more = 0;
2972         int count = 0;
2973         isdn_net_phone *n;
2974
2975         if (!p)
2976                 return -ENODEV;
2977         inout &= 1;
2978         for (n = p->local->phone[inout]; n; n = n->next) {
2979                 if (more) {
2980                         put_user(' ', phones++);
2981                         count++;
2982                 }
2983                 if (copy_to_user(phones, n->num, strlen(n->num) + 1)) {
2984                         return -EFAULT;
2985                 }
2986                 phones += strlen(n->num);
2987                 count += strlen(n->num);
2988                 more = 1;
2989         }
2990         put_user(0, phones);
2991         count++;
2992         return count;
2993 }
2994
2995 /*
2996  * Copy a string containing the peer's phone number of a connected interface
2997  * to user space.
2998  */
2999 int
3000 isdn_net_getpeer(isdn_net_ioctl_phone *phone, isdn_net_ioctl_phone __user *peer)
3001 {
3002         isdn_net_dev *p = isdn_net_findif(phone->name);
3003         int ch, dv, idx;
3004
3005         if (!p)
3006                 return -ENODEV;
3007         /*
3008          * Theoretical race: while this executes, the remote number might
3009          * become invalid (hang up) or change (new connection), resulting
3010          * in (partially) wrong number copied to user. This race
3011          * currently ignored.
3012          */
3013         ch = p->local->isdn_channel;
3014         dv = p->local->isdn_device;
3015         if(ch < 0 && dv < 0)
3016                 return -ENOTCONN;
3017         idx = isdn_dc2minor(dv, ch);
3018         if (idx <0 )
3019                 return -ENODEV;
3020         /* for pre-bound channels, we need this extra check */
3021         if (strncmp(dev->num[idx], "???", 3) == 0)
3022                 return -ENOTCONN;
3023         strncpy(phone->phone, dev->num[idx], ISDN_MSNLEN);
3024         phone->outgoing = USG_OUTGOING(dev->usage[idx]);
3025         if (copy_to_user(peer, phone, sizeof(*peer)))
3026                 return -EFAULT;
3027         return 0;
3028 }
3029 /*
3030  * Delete a phone-number from an interface.
3031  */
3032 int
3033 isdn_net_delphone(isdn_net_ioctl_phone * phone)
3034 {
3035         isdn_net_dev *p = isdn_net_findif(phone->name);
3036         int inout = phone->outgoing & 1;
3037         isdn_net_phone *n;
3038         isdn_net_phone *m;
3039
3040         if (p) {
3041                 n = p->local->phone[inout];
3042                 m = NULL;
3043                 while (n) {
3044                         if (!strcmp(n->num, phone->phone)) {
3045                                 if (p->local->dial == n)
3046                                         p->local->dial = n->next;
3047                                 if (m)
3048                                         m->next = n->next;
3049                                 else
3050                                         p->local->phone[inout] = n->next;
3051                                 kfree(n);
3052                                 return 0;
3053                         }
3054                         m = n;
3055                         n = (isdn_net_phone *) n->next;
3056                 }
3057                 return -EINVAL;
3058         }
3059         return -ENODEV;
3060 }
3061
3062 /*
3063  * Delete all phone-numbers of an interface.
3064  */
3065 static int
3066 isdn_net_rmallphone(isdn_net_dev * p)
3067 {
3068         isdn_net_phone *n;
3069         isdn_net_phone *m;
3070         int i;
3071
3072         for (i = 0; i < 2; i++) {
3073                 n = p->local->phone[i];
3074                 while (n) {
3075                         m = n->next;
3076                         kfree(n);
3077                         n = m;
3078                 }
3079                 p->local->phone[i] = NULL;
3080         }
3081         p->local->dial = NULL;
3082         return 0;
3083 }
3084
3085 /*
3086  * Force a hangup of a network-interface.
3087  */
3088 int
3089 isdn_net_force_hangup(char *name)
3090 {
3091         isdn_net_dev *p = isdn_net_findif(name);
3092         struct net_device *q;
3093
3094         if (p) {
3095                 if (p->local->isdn_device < 0)
3096                         return 1;
3097                 q = p->local->slave;
3098                 /* If this interface has slaves, do a hangup for them also. */
3099                 while (q) {
3100                         isdn_net_hangup(q);
3101                         q = MASTER_TO_SLAVE(q);
3102                 }
3103                 isdn_net_hangup(p->dev);
3104                 return 0;
3105         }
3106         return -ENODEV;
3107 }
3108
3109 /*
3110  * Helper-function for isdn_net_rm: Do the real work.
3111  */
3112 static int
3113 isdn_net_realrm(isdn_net_dev * p, isdn_net_dev * q)
3114 {
3115         u_long flags;
3116
3117         if (isdn_net_device_started(p)) {
3118                 return -EBUSY;
3119         }
3120 #ifdef CONFIG_ISDN_X25
3121         if( p -> cprot && p -> cprot -> pops )
3122                 p -> cprot -> pops -> proto_del ( p -> cprot );
3123 #endif
3124         /* Free all phone-entries */
3125         isdn_net_rmallphone(p);
3126         /* If interface is bound exclusive, free channel-usage */
3127         if (p->local->exclusive != -1)
3128                 isdn_unexclusive_channel(p->local->pre_device, p->local->pre_channel);
3129         if (p->local->master) {
3130                 /* It's a slave-device, so update master's slave-pointer if necessary */
3131                 if (((isdn_net_local *) ISDN_MASTER_PRIV(p->local))->slave ==
3132                     p->dev)
3133                         ((isdn_net_local *)ISDN_MASTER_PRIV(p->local))->slave =
3134                                 p->local->slave;
3135         } else {
3136                 /* Unregister only if it's a master-device */
3137                 unregister_netdev(p->dev);
3138         }
3139         /* Unlink device from chain */
3140         spin_lock_irqsave(&dev->lock, flags);
3141         if (q)
3142                 q->next = p->next;
3143         else
3144                 dev->netdev = p->next;
3145         if (p->local->slave) {
3146                 /* If this interface has a slave, remove it also */
3147                 char *slavename = p->local->slave->name;
3148                 isdn_net_dev *n = dev->netdev;
3149                 q = NULL;
3150                 while (n) {
3151                         if (!strcmp(n->dev->name, slavename)) {
3152                                 spin_unlock_irqrestore(&dev->lock, flags);
3153                                 isdn_net_realrm(n, q);
3154                                 spin_lock_irqsave(&dev->lock, flags);
3155                                 break;
3156                         }
3157                         q = n;
3158                         n = (isdn_net_dev *)n->next;
3159                 }
3160         }
3161         spin_unlock_irqrestore(&dev->lock, flags);
3162         /* If no more net-devices remain, disable auto-hangup timer */
3163         if (dev->netdev == NULL)
3164                 isdn_timer_ctrl(ISDN_TIMER_NETHANGUP, 0);
3165         free_netdev(p->dev);
3166         kfree(p);
3167
3168         return 0;
3169 }
3170
3171 /*
3172  * Remove a single network-interface.
3173  */
3174 int
3175 isdn_net_rm(char *name)
3176 {
3177         u_long flags;
3178         isdn_net_dev *p;
3179         isdn_net_dev *q;
3180
3181         /* Search name in netdev-chain */
3182         spin_lock_irqsave(&dev->lock, flags);
3183         p = dev->netdev;
3184         q = NULL;
3185         while (p) {
3186                 if (!strcmp(p->dev->name, name)) {
3187                         spin_unlock_irqrestore(&dev->lock, flags);
3188                         return (isdn_net_realrm(p, q));
3189                 }
3190                 q = p;
3191                 p = (isdn_net_dev *) p->next;
3192         }
3193         spin_unlock_irqrestore(&dev->lock, flags);
3194         /* If no more net-devices remain, disable auto-hangup timer */
3195         if (dev->netdev == NULL)
3196                 isdn_timer_ctrl(ISDN_TIMER_NETHANGUP, 0);
3197         return -ENODEV;
3198 }
3199
3200 /*
3201  * Remove all network-interfaces
3202  */
3203 int
3204 isdn_net_rmall(void)
3205 {
3206         u_long flags;
3207         int ret;
3208
3209         /* Walk through netdev-chain */
3210         spin_lock_irqsave(&dev->lock, flags);
3211         while (dev->netdev) {
3212                 if (!dev->netdev->local->master) {
3213                         /* Remove master-devices only, slaves get removed with their master */
3214                         spin_unlock_irqrestore(&dev->lock, flags);
3215                         if ((ret = isdn_net_realrm(dev->netdev, NULL))) {
3216                                 return ret;
3217                         }
3218                         spin_lock_irqsave(&dev->lock, flags);
3219                 }
3220         }
3221         dev->netdev = NULL;
3222         spin_unlock_irqrestore(&dev->lock, flags);
3223         return 0;
3224 }