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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_net_local *) lp->master->priv)->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 *) dev->priv ) -> dops;
 217         struct concap_proto * cprot =
 218                 ( (isdn_net_local *) dev->priv ) -> 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
 254         if ((p = (((isdn_net_local *) dev->priv)->slave))) {
 255                 while (p) {
 256                         isdn_net_reset(p);
 257                         p = (((isdn_net_local *) p->priv)->slave);
 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         isdn_free_channel(lp->isdn_device, lp->isdn_channel, ISDN_USAGE_NET);
 296         lp->flags &= ~ISDN_NET_CONNECTED;
 297         lp->isdn_device = -1;
 298         lp->isdn_channel = -1;
 299 }
 300
 301 /*
 302  * Perform auto-hangup and cps-calculation for net-interfaces.
 303  *
 304  * auto-hangup:
 305  * Increment idle-counter (this counter is reset on any incoming or
 306  * outgoing packet), if counter exceeds configured limit either do a
 307  * hangup immediately or - if configured - wait until just before the next
 308  * charge-info.
 309  *
 310  * cps-calculation (needed for dynamic channel-bundling):
 311  * Since this function is called every second, simply reset the
 312  * byte-counter of the interface after copying it to the cps-variable.
 313  */
 314 static unsigned long last_jiffies = -HZ;
 315
 316 void
 317 isdn_net_autohup(void)
 318 {
 319         isdn_net_dev *p = dev->netdev;
 320         int anymore;
 321
 322         anymore = 0;
 323         while (p) {
 324                 isdn_net_local *l = p->local;
 325                 if (jiffies == last_jiffies)
 326                         l->cps = l->transcount;
 327                 else
 328                         l->cps = (l->transcount * HZ) / (jiffies - last_jiffies);
 329                 l->transcount = 0;
 330                 if (dev->net_verbose > 3)
 331                         printk(KERN_DEBUG "%s: %d bogocps\n", p->dev->name, l->cps);
 332                 if ((l->flags & ISDN_NET_CONNECTED) && (!l->dialstate)) {
 333                         anymore = 1;
 334                         l->huptimer++;
 335                         /*
 336                          * if there is some dialmode where timeout-hangup
 337                          * should _not_ be done, check for that here
 338                          */
 339                         if ((l->onhtime) &&
 340                             (l->huptimer > l->onhtime))
 341                         {
 342                                 if (l->hupflags & ISDN_MANCHARGE &&
 343                                     l->hupflags & ISDN_CHARGEHUP) {
 344                                         while (time_after(jiffies, l->chargetime + l->chargeint))
 345                                                 l->chargetime += l->chargeint;
 346                                         if (time_after(jiffies, l->chargetime + l->chargeint - 2 * HZ))
 347                                                 if (l->outgoing || l->hupflags & ISDN_INHUP)
 348                                                         isdn_net_hangup(p->dev);
 349                                 } else if (l->outgoing) {
 350                                         if (l->hupflags & ISDN_CHARGEHUP) {
 351                                                 if (l->hupflags & ISDN_WAITCHARGE) {
 352                                                         printk(KERN_DEBUG "isdn_net: Hupflags of %s are %X\n",
 353                                                                p->dev->name, l->hupflags);
 354                                                         isdn_net_hangup(p->dev);
 355                                                 } else if (time_after(jiffies, l->chargetime + l->chargeint)) {
 356                                                         printk(KERN_DEBUG
 357                                                                "isdn_net: %s: chtime = %lu, chint = %d\n",
 358                                                                p->dev->name, l->chargetime, l->chargeint);
 359                                                         isdn_net_hangup(p->dev);
 360                                                 }
 361                                         } else
 362                                                 isdn_net_hangup(p->dev);
 363                                 } else if (l->hupflags & ISDN_INHUP)
 364                                         isdn_net_hangup(p->dev);
 365                         }
 366
 367                         if(dev->global_flags & ISDN_GLOBAL_STOPPED || (ISDN_NET_DIALMODE(*l) == ISDN_NET_DM_OFF)) {
 368                                 isdn_net_hangup(p->dev);
 369                                 break;
 370                         }
 371                 }
 372                 p = (isdn_net_dev *) p->next;
 373         }
 374         last_jiffies = jiffies;
 375         isdn_timer_ctrl(ISDN_TIMER_NETHANGUP, anymore);
 376 }
 377
 378 static void isdn_net_lp_disconnected(isdn_net_local *lp)
 379 {
 380         isdn_net_rm_from_bundle(lp);
 381 }
 382
 383 /*
 384  * Handle status-messages from ISDN-interfacecard.
 385  * This function is called from within the main-status-dispatcher
 386  * isdn_status_callback, which itself is called from the low-level driver.
 387  * Return: 1 = Event handled, 0 = not for us or unknown Event.
 388  */
 389 int
 390 isdn_net_stat_callback(int idx, isdn_ctrl *c)
 391 {
 392         isdn_net_dev *p = dev->st_netdev[idx];
 393         int cmd = c->command;
 394
 395         if (p) {
 396                 isdn_net_local *lp = p->local;
 397 #ifdef CONFIG_ISDN_X25
 398                 struct concap_proto *cprot = lp->netdev->cprot;
 399                 struct concap_proto_ops *pops = cprot ? cprot->pops : NULL;
 400 #endif
 401                 switch (cmd) {
 402                         case ISDN_STAT_BSENT:
 403                                 /* A packet has successfully been sent out */
 404                                 if ((lp->flags & ISDN_NET_CONNECTED) &&
 405                                     (!lp->dialstate)) {
 406                                         isdn_net_dec_frame_cnt(lp);
 407                                         lp->stats.tx_packets++;
 408                                         lp->stats.tx_bytes += c->parm.length;
 409                                 }
 410                                 return 1;
 411                         case ISDN_STAT_DCONN:
 412                                 /* D-Channel is up */
 413                                 switch (lp->dialstate) {
 414                                         case 4:
 415                                         case 7:
 416                                         case 8:
 417                                                 lp->dialstate++;
 418                                                 return 1;
 419                                         case 12:
 420                                                 lp->dialstate = 5;
 421                                                 return 1;
 422                                 }
 423                                 break;
 424                         case ISDN_STAT_DHUP:
 425                                 /* Either D-Channel-hangup or error during dialout */
 426 #ifdef CONFIG_ISDN_X25
 427                                 /* If we are not connencted then dialing had
 428                                    failed. If there are generic encap protocol
 429                                    receiver routines signal the closure of
 430                                    the link*/
 431
 432                                 if( !(lp->flags & ISDN_NET_CONNECTED)
 433                                     && pops && pops -> disconn_ind )
 434                                         pops -> disconn_ind(cprot);
 435 #endif /* CONFIG_ISDN_X25 */
 436                                 if ((!lp->dialstate) && (lp->flags & ISDN_NET_CONNECTED)) {
 437                                         if (lp->p_encap == ISDN_NET_ENCAP_CISCOHDLCK)
 438                                                 isdn_net_ciscohdlck_disconnected(lp);
 439 #ifdef CONFIG_ISDN_PPP
 440                                         if (lp->p_encap == ISDN_NET_ENCAP_SYNCPPP)
 441                                                 isdn_ppp_free(lp);
 442 #endif
 443                                         isdn_net_lp_disconnected(lp);
 444                                         isdn_all_eaz(lp->isdn_device, lp->isdn_channel);
 445                                         printk(KERN_INFO "%s: remote hangup\n", p->dev->name);
 446                                         printk(KERN_INFO "%s: Chargesum is %d\n", p->dev->name,
 447                                                lp->charge);
 448                                         isdn_net_unbind_channel(lp);
 449                                         return 1;
 450                                 }
 451                                 break;
 452 #ifdef CONFIG_ISDN_X25
 453                         case ISDN_STAT_BHUP:
 454                                 /* B-Channel-hangup */
 455                                 /* try if there are generic encap protocol
 456                                    receiver routines and signal the closure of
 457                                    the link */
 458                                 if( pops  &&  pops -> disconn_ind ){
 459                                                 pops -> disconn_ind(cprot);
 460                                                 return 1;
 461                                         }
 462                                 break;
 463 #endif /* CONFIG_ISDN_X25 */
 464                         case ISDN_STAT_BCONN:
 465                                 /* B-Channel is up */
 466                                 isdn_net_zero_frame_cnt(lp);
 467                                 switch (lp->dialstate) {
 468                                         case 5:
 469                                         case 6:
 470                                         case 7:
 471                                         case 8:
 472                                         case 9:
 473                                         case 10:
 474                                         case 12:
 475                                                 if (lp->dialstate <= 6) {
 476                                                         dev->usage[idx] |= ISDN_USAGE_OUTGOING;
 477                                                         isdn_info_update();
 478                                                 } else
 479                                                         dev->rx_netdev[idx] = p;
 480                                                 lp->dialstate = 0;
 481                                                 isdn_timer_ctrl(ISDN_TIMER_NETHANGUP, 1);
 482                                                 if (lp->p_encap == ISDN_NET_ENCAP_CISCOHDLCK)
 483                                                         isdn_net_ciscohdlck_connected(lp);
 484                                                 if (lp->p_encap != ISDN_NET_ENCAP_SYNCPPP) {
 485                                                         if (lp->master) { /* is lp a slave? */
 486                                                                 isdn_net_dev *nd = ((isdn_net_local *)lp->master->priv)->netdev;
 487                                                                 isdn_net_add_to_bundle(nd, lp);
 488                                                         }
 489                                                 }
 490                                                 printk(KERN_INFO "isdn_net: %s connected\n", p->dev->name);
 491                                                 /* If first Chargeinfo comes before B-Channel connect,
 492                                                  * we correct the timestamp here.
 493                                                  */
 494                                                 lp->chargetime = jiffies;
 495
 496                                                 /* reset dial-timeout */
 497                                                 lp->dialstarted = 0;
 498                                                 lp->dialwait_timer = 0;
 499
 500 #ifdef CONFIG_ISDN_PPP
 501                                                 if (lp->p_encap == ISDN_NET_ENCAP_SYNCPPP)
 502                                                         isdn_ppp_wakeup_daemon(lp);
 503 #endif
 504 #ifdef CONFIG_ISDN_X25
 505                                                 /* try if there are generic concap receiver routines */
 506                                                 if( pops )
 507                                                         if( pops->connect_ind)
 508                                                                 pops->connect_ind(cprot);
 509 #endif /* CONFIG_ISDN_X25 */
 510                                                 /* ppp needs to do negotiations first */
 511                                                 if (lp->p_encap != ISDN_NET_ENCAP_SYNCPPP)
 512                                                         isdn_net_device_wake_queue(lp);
 513                                                 return 1;
 514                                 }
 515                                 break;
 516                         case ISDN_STAT_NODCH:
 517                                 /* No D-Channel avail. */
 518                                 if (lp->dialstate == 4) {
 519                                         lp->dialstate--;
 520                                         return 1;
 521                                 }
 522                                 break;
 523                         case ISDN_STAT_CINF:
 524                                 /* Charge-info from TelCo. Calculate interval between
 525                                  * charge-infos and set timestamp for last info for
 526                                  * usage by isdn_net_autohup()
 527                                  */
 528                                 lp->charge++;
 529                                 if (lp->hupflags & ISDN_HAVECHARGE) {
 530                                         lp->hupflags &= ~ISDN_WAITCHARGE;
 531                                         lp->chargeint = jiffies - lp->chargetime - (2 * HZ);
 532                                 }
 533                                 if (lp->hupflags & ISDN_WAITCHARGE)
 534                                         lp->hupflags |= ISDN_HAVECHARGE;
 535                                 lp->chargetime = jiffies;
 536                                 printk(KERN_DEBUG "isdn_net: Got CINF chargetime of %s now %lu\n",
 537                                        p->dev->name, lp->chargetime);
 538                                 return 1;
 539                 }
 540         }
 541         return 0;
 542 }
 543
 544 /*
 545  * Perform dialout for net-interfaces and timeout-handling for
 546  * D-Channel-up and B-Channel-up Messages.
 547  * This function is initially called from within isdn_net_start_xmit() or
 548  * or isdn_net_find_icall() after initializing the dialstate for an
 549  * interface. If further calls are needed, the function schedules itself
 550  * for a timer-callback via isdn_timer_function().
 551  * The dialstate is also affected by incoming status-messages from
 552  * the ISDN-Channel which are handled in isdn_net_stat_callback() above.
 553  */
 554 void
 555 isdn_net_dial(void)
 556 {
 557         isdn_net_dev *p = dev->netdev;
 558         int anymore = 0;
 559         int i;
 560         isdn_ctrl cmd;
 561         u_char *phone_number;
 562
 563         while (p) {
 564                 isdn_net_local *lp = p->local;
 565
 566 #ifdef ISDN_DEBUG_NET_DIAL
 567                 if (lp->dialstate)
 568                         printk(KERN_DEBUG "%s: dialstate=%d\n", p->dev->name, lp->dialstate);
 569 #endif
 570                 switch (lp->dialstate) {
 571                         case 0:
 572                                 /* Nothing to do for this interface */
 573                                 break;
 574                         case 1:
 575                                 /* Initiate dialout. Set phone-number-pointer to first number
 576                                  * of interface.
 577                                  */
 578                                 lp->dial = lp->phone[1];
 579                                 if (!lp->dial) {
 580                                         printk(KERN_WARNING "%s: phone number deleted?\n",
 581                                                p->dev->name);
 582                                         isdn_net_hangup(p->dev);
 583                                         break;
 584                                 }
 585                                 anymore = 1;
 586
 587                                 if(lp->dialtimeout > 0)
 588                                         if(lp->dialstarted == 0 || time_after(jiffies, lp->dialstarted + lp->dialtimeout + lp->dialwait)) {
 589                                                 lp->dialstarted = jiffies;
 590                                                 lp->dialwait_timer = 0;
 591                                         }
 592
 593                                 lp->dialstate++;
 594                                 /* Fall through */
 595                         case 2:
 596                                 /* Prepare dialing. Clear EAZ, then set EAZ. */
 597                                 cmd.driver = lp->isdn_device;
 598                                 cmd.arg = lp->isdn_channel;
 599                                 cmd.command = ISDN_CMD_CLREAZ;
 600                                 isdn_command(&cmd);
 601                                 sprintf(cmd.parm.num, "%s", isdn_map_eaz2msn(lp->msn, cmd.driver));
 602                                 cmd.command = ISDN_CMD_SETEAZ;
 603                                 isdn_command(&cmd);
 604                                 lp->dialretry = 0;
 605                                 anymore = 1;
 606                                 lp->dialstate++;
 607                                 /* Fall through */
 608                         case 3:
 609                                 /* Setup interface, dial current phone-number, switch to next number.
 610                                  * If list of phone-numbers is exhausted, increment
 611                                  * retry-counter.
 612                                  */
 613                                 if(dev->global_flags & ISDN_GLOBAL_STOPPED || (ISDN_NET_DIALMODE(*lp) == ISDN_NET_DM_OFF)) {
 614                                         char *s;
 615                                         if (dev->global_flags & ISDN_GLOBAL_STOPPED)
 616                                                 s = "dial suppressed: isdn system stopped";
 617                                         else
 618                                                 s = "dial suppressed: dialmode `off'";
 619                                         isdn_net_unreachable(p->dev, NULL, s);
 620                                         isdn_net_hangup(p->dev);
 621                                         break;
 622                                 }
 623                                 cmd.driver = lp->isdn_device;
 624                                 cmd.command = ISDN_CMD_SETL2;
 625                                 cmd.arg = lp->isdn_channel + (lp->l2_proto << 8);
 626                                 isdn_command(&cmd);
 627                                 cmd.driver = lp->isdn_device;
 628                                 cmd.command = ISDN_CMD_SETL3;
 629                                 cmd.arg = lp->isdn_channel + (lp->l3_proto << 8);
 630                                 isdn_command(&cmd);
 631                                 cmd.driver = lp->isdn_device;
 632                                 cmd.arg = lp->isdn_channel;
 633                                 if (!lp->dial) {
 634                                         printk(KERN_WARNING "%s: phone number deleted?\n",
 635                                                p->dev->name);
 636                                         isdn_net_hangup(p->dev);
 637                                         break;
 638                                 }
 639                                 if (!strncmp(lp->dial->num, "LEASED", strlen("LEASED"))) {
 640                                         lp->dialstate = 4;
 641                                         printk(KERN_INFO "%s: Open leased line ...\n", p->dev->name);
 642                                 } else {
 643                                         if(lp->dialtimeout > 0)
 644                                                 if (time_after(jiffies, lp->dialstarted + lp->dialtimeout)) {
 645                                                         lp->dialwait_timer = jiffies + lp->dialwait;
 646                                                         lp->dialstarted = 0;
 647                                                         isdn_net_unreachable(p->dev, NULL, "dial: timed out");
 648                                                         isdn_net_hangup(p->dev);
 649                                                         break;
 650                                                 }
 651
 652                                         cmd.driver = lp->isdn_device;
 653                                         cmd.command = ISDN_CMD_DIAL;
 654                                         cmd.parm.setup.si2 = 0;
 655
 656                                         /* check for DOV */
 657                                         phone_number = lp->dial->num;
 658                                         if ((*phone_number == 'v') ||
 659                                             (*phone_number == 'V')) { /* DOV call */
 660                                                 cmd.parm.setup.si1 = 1;
 661                                         } else { /* DATA call */
 662                                                 cmd.parm.setup.si1 = 7;
 663                                         }
 664
 665                                         strcpy(cmd.parm.setup.phone, phone_number);
 666                                         /*
 667                                          * Switch to next number or back to start if at end of list.
 668                                          */
 669                                         if (!(lp->dial = (isdn_net_phone *) lp->dial->next)) {
 670                                                 lp->dial = lp->phone[1];
 671                                                 lp->dialretry++;
 672
 673                                                 if (lp->dialretry > lp->dialmax) {
 674                                                         if (lp->dialtimeout == 0) {
 675                                                                 lp->dialwait_timer = jiffies + lp->dialwait;
 676                                                                 lp->dialstarted = 0;
 677                                                                 isdn_net_unreachable(p->dev, NULL, "dial: tried all numbers dialmax times");
 678                                                         }
 679                                                         isdn_net_hangup(p->dev);
 680                                                         break;
 681                                                 }
 682                                         }
 683                                         sprintf(cmd.parm.setup.eazmsn, "%s",
 684                                                 isdn_map_eaz2msn(lp->msn, cmd.driver));
 685                                         i = isdn_dc2minor(lp->isdn_device, lp->isdn_channel);
 686                                         if (i >= 0) {
 687                                                 strcpy(dev->num[i], cmd.parm.setup.phone);
 688                                                 dev->usage[i] |= ISDN_USAGE_OUTGOING;
 689                                                 isdn_info_update();
 690                                         }
 691                                         printk(KERN_INFO "%s: dialing %d %s... %s\n", p->dev->name,
 692                                                lp->dialretry, cmd.parm.setup.phone,
 693                                                (cmd.parm.setup.si1 == 1) ? "DOV" : "");
 694                                         lp->dtimer = 0;
 695 #ifdef ISDN_DEBUG_NET_DIAL
 696                                         printk(KERN_DEBUG "dial: d=%d c=%d\n", lp->isdn_device,
 697                                                lp->isdn_channel);
 698 #endif
 699                                         isdn_command(&cmd);
 700                                 }
 701                                 lp->huptimer = 0;
 702                                 lp->outgoing = 1;
 703                                 if (lp->chargeint) {
 704                                         lp->hupflags |= ISDN_HAVECHARGE;
 705                                         lp->hupflags &= ~ISDN_WAITCHARGE;
 706                                 } else {
 707                                         lp->hupflags |= ISDN_WAITCHARGE;
 708                                         lp->hupflags &= ~ISDN_HAVECHARGE;
 709                                 }
 710                                 anymore = 1;
 711                                 lp->dialstate =
 712                                     (lp->cbdelay &&
 713                                      (lp->flags & ISDN_NET_CBOUT)) ? 12 : 4;
 714                                 break;
 715                         case 4:
 716                                 /* Wait for D-Channel-connect.
 717                                  * If timeout, switch back to state 3.
 718                                  * Dialmax-handling moved to state 3.
 719                                  */
 720                                 if (lp->dtimer++ > ISDN_TIMER_DTIMEOUT10)
 721                                         lp->dialstate = 3;
 722                                 anymore = 1;
 723                                 break;
 724                         case 5:
 725                                 /* Got D-Channel-Connect, send B-Channel-request */
 726                                 cmd.driver = lp->isdn_device;
 727                                 cmd.arg = lp->isdn_channel;
 728                                 cmd.command = ISDN_CMD_ACCEPTB;
 729                                 anymore = 1;
 730                                 lp->dtimer = 0;
 731                                 lp->dialstate++;
 732                                 isdn_command(&cmd);
 733                                 break;
 734                         case 6:
 735                                 /* Wait for B- or D-Channel-connect. If timeout,
 736                                  * switch back to state 3.
 737                                  */
 738 #ifdef ISDN_DEBUG_NET_DIAL
 739                                 printk(KERN_DEBUG "dialtimer2: %d\n", lp->dtimer);
 740 #endif
 741                                 if (lp->dtimer++ > ISDN_TIMER_DTIMEOUT10)
 742                                         lp->dialstate = 3;
 743                                 anymore = 1;
 744                                 break;
 745                         case 7:
 746                                 /* Got incoming Call, setup L2 and L3 protocols,
 747                                  * then wait for D-Channel-connect
 748                                  */
 749 #ifdef ISDN_DEBUG_NET_DIAL
 750                                 printk(KERN_DEBUG "dialtimer4: %d\n", lp->dtimer);
 751 #endif
 752                                 cmd.driver = lp->isdn_device;
 753                                 cmd.command = ISDN_CMD_SETL2;
 754                                 cmd.arg = lp->isdn_channel + (lp->l2_proto << 8);
 755                                 isdn_command(&cmd);
 756                                 cmd.driver = lp->isdn_device;
 757                                 cmd.command = ISDN_CMD_SETL3;
 758                                 cmd.arg = lp->isdn_channel + (lp->l3_proto << 8);
 759                                 isdn_command(&cmd);
 760                                 if (lp->dtimer++ > ISDN_TIMER_DTIMEOUT15)
 761                                         isdn_net_hangup(p->dev);
 762                                 else {
 763                                         anymore = 1;
 764                                         lp->dialstate++;
 765                                 }
 766                                 break;
 767                         case 9:
 768                                 /* Got incoming D-Channel-Connect, send B-Channel-request */
 769                                 cmd.driver = lp->isdn_device;
 770                                 cmd.arg = lp->isdn_channel;
 771                                 cmd.command = ISDN_CMD_ACCEPTB;
 772                                 isdn_command(&cmd);
 773                                 anymore = 1;
 774                                 lp->dtimer = 0;
 775                                 lp->dialstate++;
 776                                 break;
 777                         case 8:
 778                         case 10:
 779                                 /*  Wait for B- or D-channel-connect */
 780 #ifdef ISDN_DEBUG_NET_DIAL
 781                                 printk(KERN_DEBUG "dialtimer4: %d\n", lp->dtimer);
 782 #endif
 783                                 if (lp->dtimer++ > ISDN_TIMER_DTIMEOUT10)
 784                                         isdn_net_hangup(p->dev);
 785                                 else
 786                                         anymore = 1;
 787                                 break;
 788                         case 11:
 789                                 /* Callback Delay */
 790                                 if (lp->dtimer++ > lp->cbdelay)
 791                                         lp->dialstate = 1;
 792                                 anymore = 1;
 793                                 break;
 794                         case 12:
 795                                 /* Remote does callback. Hangup after cbdelay, then wait for incoming
 796                                  * call (in state 4).
 797                                  */
 798                                 if (lp->dtimer++ > lp->cbdelay)
 799                                 {
 800                                         printk(KERN_INFO "%s: hangup waiting for callback ...\n", p->dev->name);
 801                                         lp->dtimer = 0;
 802                                         lp->dialstate = 4;
 803                                         cmd.driver = lp->isdn_device;
 804                                         cmd.command = ISDN_CMD_HANGUP;
 805                                         cmd.arg = lp->isdn_channel;
 806                                         isdn_command(&cmd);
 807                                         isdn_all_eaz(lp->isdn_device, lp->isdn_channel);
 808                                 }
 809                                 anymore = 1;
 810                                 break;
 811                         default:
 812                                 printk(KERN_WARNING "isdn_net: Illegal dialstate %d for device %s\n",
 813                                        lp->dialstate, p->dev->name);
 814                 }
 815                 p = (isdn_net_dev *) p->next;
 816         }
 817         isdn_timer_ctrl(ISDN_TIMER_NETDIAL, anymore);
 818 }
 819
 820 /*
 821  * Perform hangup for a net-interface.
 822  */
 823 void
 824 isdn_net_hangup(struct net_device *d)
 825 {
 826         isdn_net_local *lp = (isdn_net_local *) d->priv;
 827         isdn_ctrl cmd;
 828 #ifdef CONFIG_ISDN_X25
 829         struct concap_proto *cprot = lp->netdev->cprot;
 830         struct concap_proto_ops *pops = cprot ? cprot->pops : NULL;
 831 #endif
 832
 833         if (lp->flags & ISDN_NET_CONNECTED) {
 834                 if (lp->slave != NULL) {
 835                         isdn_net_local *slp = (isdn_net_local *)lp->slave->priv;
 836                         if (slp->flags & ISDN_NET_CONNECTED) {
 837                                 printk(KERN_INFO
 838                                         "isdn_net: hang up slave %s before %s\n",
 839                                         lp->slave->name, d->name);
 840                                 isdn_net_hangup(lp->slave);
 841                         }
 842                 }
 843                 printk(KERN_INFO "isdn_net: local hangup %s\n", d->name);
 844 #ifdef CONFIG_ISDN_PPP
 845                 if (lp->p_encap == ISDN_NET_ENCAP_SYNCPPP)
 846                         isdn_ppp_free(lp);
 847 #endif
 848                 isdn_net_lp_disconnected(lp);
 849 #ifdef CONFIG_ISDN_X25
 850                 /* try if there are generic encap protocol
 851                    receiver routines and signal the closure of
 852                    the link */
 853                 if( pops && pops -> disconn_ind )
 854                   pops -> disconn_ind(cprot);
 855 #endif /* CONFIG_ISDN_X25 */
 856
 857                 cmd.driver = lp->isdn_device;
 858                 cmd.command = ISDN_CMD_HANGUP;
 859                 cmd.arg = lp->isdn_channel;
 860                 isdn_command(&cmd);
 861                 printk(KERN_INFO "%s: Chargesum is %d\n", d->name, lp->charge);
 862                 isdn_all_eaz(lp->isdn_device, lp->isdn_channel);
 863         }
 864         isdn_net_unbind_channel(lp);
 865 }
 866
 867 typedef struct {
 868         unsigned short source;
 869         unsigned short dest;
 870 } ip_ports;
 871
 872 static void
 873 isdn_net_log_skb(struct sk_buff * skb, isdn_net_local * lp)
 874 {
 875         /* hopefully, this was set correctly */
 876         const u_char *p = skb_network_header(skb);
 877         unsigned short proto = ntohs(skb->protocol);
 878         int data_ofs;
 879         ip_ports *ipp;
 880         char addinfo[100];
 881
 882         addinfo[0] = '\0';
 883         /* This check stolen from 2.1.72 dev_queue_xmit_nit() */
 884         if (p < skb->data || skb->network_header >= skb->tail) {
 885                 /* fall back to old isdn_net_log_packet method() */
 886                 char * buf = skb->data;
 887
 888                 printk(KERN_DEBUG "isdn_net: protocol %04x is buggy, dev %s\n", skb->protocol, lp->netdev->dev->name);
 889                 p = buf;
 890                 proto = ETH_P_IP;
 891                 switch (lp->p_encap) {
 892                         case ISDN_NET_ENCAP_IPTYP:
 893                                 proto = ntohs(*(unsigned short *) &buf[0]);
 894                                 p = &buf[2];
 895                                 break;
 896                         case ISDN_NET_ENCAP_ETHER:
 897                                 proto = ntohs(*(unsigned short *) &buf[12]);
 898                                 p = &buf[14];
 899                                 break;
 900                         case ISDN_NET_ENCAP_CISCOHDLC:
 901                                 proto = ntohs(*(unsigned short *) &buf[2]);
 902                                 p = &buf[4];
 903                                 break;
 904 #ifdef CONFIG_ISDN_PPP
 905                         case ISDN_NET_ENCAP_SYNCPPP:
 906                                 proto = ntohs(skb->protocol);
 907                                 p = &buf[IPPP_MAX_HEADER];
 908                                 break;
 909 #endif
 910                 }
 911         }
 912         data_ofs = ((p[0] & 15) * 4);
 913         switch (proto) {
 914                 case ETH_P_IP:
 915                         switch (p[9]) {
 916                                 case 1:
 917                                         strcpy(addinfo, " ICMP");
 918                                         break;
 919                                 case 2:
 920                                         strcpy(addinfo, " IGMP");
 921                                         break;
 922                                 case 4:
 923                                         strcpy(addinfo, " IPIP");
 924                                         break;
 925                                 case 6:
 926                                         ipp = (ip_ports *) (&p[data_ofs]);
 927                                         sprintf(addinfo, " TCP, port: %d -> %d", ntohs(ipp->source),
 928                                                 ntohs(ipp->dest));
 929                                         break;
 930                                 case 8:
 931                                         strcpy(addinfo, " EGP");
 932                                         break;
 933                                 case 12:
 934                                         strcpy(addinfo, " PUP");
 935                                         break;
 936                                 case 17:
 937                                         ipp = (ip_ports *) (&p[data_ofs]);
 938                                         sprintf(addinfo, " UDP, port: %d -> %d", ntohs(ipp->source),
 939                                                 ntohs(ipp->dest));
 940                                         break;
 941                                 case 22:
 942                                         strcpy(addinfo, " IDP");
 943                                         break;
 944                         }
 945                         printk(KERN_INFO
 946                                 "OPEN: %d.%d.%d.%d -> %d.%d.%d.%d%s\n",
 947
 948                                p[12], p[13], p[14], p[15],
 949                                p[16], p[17], p[18], p[19],
 950                                addinfo);
 951                         break;
 952                 case ETH_P_ARP:
 953                         printk(KERN_INFO
 954                                 "OPEN: ARP %d.%d.%d.%d -> *.*.*.* ?%d.%d.%d.%d\n",
 955                                p[14], p[15], p[16], p[17],
 956                                p[24], p[25], p[26], p[27]);
 957                         break;
 958         }
 959 }
 960
 961 /*
 962  * this function is used to send supervisory data, i.e. data which was
 963  * not received from the network layer, but e.g. frames from ipppd, CCP
 964  * reset frames etc.
 965  */
 966 void isdn_net_write_super(isdn_net_local *lp, struct sk_buff *skb)
 967 {
 968         if (in_irq()) {
 969                 // we can't grab the lock from irq context,
 970                 // so we just queue the packet
 971                 skb_queue_tail(&lp->super_tx_queue, skb);
 972                 schedule_work(&lp->tqueue);
 973                 return;
 974         }
 975
 976         spin_lock_bh(&lp->xmit_lock);
 977         if (!isdn_net_lp_busy(lp)) {
 978                 isdn_net_writebuf_skb(lp, skb);
 979         } else {
 980                 skb_queue_tail(&lp->super_tx_queue, skb);
 981         }
 982         spin_unlock_bh(&lp->xmit_lock);
 983 }
 984
 985 /*
 986  * called from tq_immediate
 987  */
 988 static void isdn_net_softint(struct work_struct *work)
 989 {
 990         isdn_net_local *lp = container_of(work, isdn_net_local, tqueue);
 991         struct sk_buff *skb;
 992
 993         spin_lock_bh(&lp->xmit_lock);
 994         while (!isdn_net_lp_busy(lp)) {
 995                 skb = skb_dequeue(&lp->super_tx_queue);
 996                 if (!skb)
 997                         break;
 998                 isdn_net_writebuf_skb(lp, skb);
 999         }
1000         spin_unlock_bh(&lp->xmit_lock);
1001 }
1002
1003 /*
1004  * all frames sent from the (net) LL to a HL driver should go via this function
1005  * it's serialized by the caller holding the lp->xmit_lock spinlock
1006  */
1007 void isdn_net_writebuf_skb(isdn_net_local *lp, struct sk_buff *skb)
1008 {
1009         int ret;
1010         int len = skb->len;     /* save len */
1011
1012         /* before obtaining the lock the caller should have checked that
1013            the lp isn't busy */
1014         if (isdn_net_lp_busy(lp)) {
1015                 printk("isdn BUG at %s:%d!\n", __FILE__, __LINE__);
1016                 goto error;
1017         }
1018
1019         if (!(lp->flags & ISDN_NET_CONNECTED)) {
1020                 printk("isdn BUG at %s:%d!\n", __FILE__, __LINE__);
1021                 goto error;
1022         }
1023         ret = isdn_writebuf_skb_stub(lp->isdn_device, lp->isdn_channel, 1, skb);
1024         if (ret != len) {
1025                 /* we should never get here */
1026                 printk(KERN_WARNING "%s: HL driver queue full\n", lp->netdev->dev->name);
1027                 goto error;
1028         }
1029
1030         lp->transcount += len;
1031         isdn_net_inc_frame_cnt(lp);
1032         return;
1033
1034  error:
1035         dev_kfree_skb(skb);
1036         lp->stats.tx_errors++;
1037
1038 }
1039
1040
1041 /*
1042  *  Helper function for isdn_net_start_xmit.
1043  *  When called, the connection is already established.
1044  *  Based on cps-calculation, check if device is overloaded.
1045  *  If so, and if a slave exists, trigger dialing for it.
1046  *  If any slave is online, deliver packets using a simple round robin
1047  *  scheme.
1048  *
1049  *  Return: 0 on success, !0 on failure.
1050  */
1051
1052 static int
1053 isdn_net_xmit(struct net_device *ndev, struct sk_buff *skb)
1054 {
1055         isdn_net_dev *nd;
1056         isdn_net_local *slp;
1057         isdn_net_local *lp = (isdn_net_local *) ndev->priv;
1058         int retv = 0;
1059
1060         if (((isdn_net_local *) (ndev->priv))->master) {
1061                 printk("isdn BUG at %s:%d!\n", __FILE__, __LINE__);
1062                 dev_kfree_skb(skb);
1063                 return 0;
1064         }
1065
1066         /* For the other encaps the header has already been built */
1067 #ifdef CONFIG_ISDN_PPP
1068         if (lp->p_encap == ISDN_NET_ENCAP_SYNCPPP) {
1069                 return isdn_ppp_xmit(skb, ndev);
1070         }
1071 #endif
1072         nd = ((isdn_net_local *) ndev->priv)->netdev;
1073         lp = isdn_net_get_locked_lp(nd);
1074         if (!lp) {
1075                 printk(KERN_WARNING "%s: all channels busy - requeuing!\n", ndev->name);
1076                 return 1;
1077         }
1078         /* we have our lp locked from now on */
1079
1080         /* Reset hangup-timeout */
1081         lp->huptimer = 0; // FIXME?
1082         isdn_net_writebuf_skb(lp, skb);
1083         spin_unlock_bh(&lp->xmit_lock);
1084
1085         /* the following stuff is here for backwards compatibility.
1086          * in future, start-up and hangup of slaves (based on current load)
1087          * should move to userspace and get based on an overall cps
1088          * calculation
1089          */
1090         if (lp->cps > lp->triggercps) {
1091                 if (lp->slave) {
1092                         if (!lp->sqfull) {
1093                                 /* First time overload: set timestamp only */
1094                                 lp->sqfull = 1;
1095                                 lp->sqfull_stamp = jiffies;
1096                         } else {
1097                                 /* subsequent overload: if slavedelay exceeded, start dialing */
1098                                 if (time_after(jiffies, lp->sqfull_stamp + lp->slavedelay)) {
1099                                         slp = lp->slave->priv;
1100                                         if (!(slp->flags & ISDN_NET_CONNECTED)) {
1101                                                 isdn_net_force_dial_lp((isdn_net_local *) lp->slave->priv);
1102                                         }
1103                                 }
1104                         }
1105                 }
1106         } else {
1107                 if (lp->sqfull && time_after(jiffies, lp->sqfull_stamp + lp->slavedelay + (10 * HZ))) {
1108                         lp->sqfull = 0;
1109                 }
1110                 /* this is a hack to allow auto-hangup for slaves on moderate loads */
1111                 nd->queue = nd->local;
1112         }
1113
1114         return retv;
1115
1116 }
1117
1118 static void
1119 isdn_net_adjust_hdr(struct sk_buff *skb, struct net_device *dev)
1120 {
1121         isdn_net_local *lp = (isdn_net_local *) dev->priv;
1122         if (!skb)
1123                 return;
1124         if (lp->p_encap == ISDN_NET_ENCAP_ETHER) {
1125                 const int pullsize = skb_network_offset(skb) - ETH_HLEN;
1126                 if (pullsize > 0) {
1127                         printk(KERN_DEBUG "isdn_net: Pull junk %d\n", pullsize);
1128                         skb_pull(skb, pullsize);
1129                 }
1130         }
1131 }
1132
1133
1134 static void isdn_net_tx_timeout(struct net_device * ndev)
1135 {
1136         isdn_net_local *lp = (isdn_net_local *) ndev->priv;
1137
1138         printk(KERN_WARNING "isdn_tx_timeout dev %s dialstate %d\n", ndev->name, lp->dialstate);
1139         if (!lp->dialstate){
1140                 lp->stats.tx_errors++;
1141                 /*
1142                  * There is a certain probability that this currently
1143                  * works at all because if we always wake up the interface,
1144                  * then upper layer will try to send the next packet
1145                  * immediately. And then, the old clean_up logic in the
1146                  * driver will hopefully continue to work as it used to do.
1147                  *
1148                  * This is rather primitive right know, we better should
1149                  * clean internal queues here, in particular for multilink and
1150                  * ppp, and reset HL driver's channel, too.   --HE
1151                  *
1152                  * actually, this may not matter at all, because ISDN hardware
1153                  * should not see transmitter hangs at all IMO
1154                  * changed KERN_DEBUG to KERN_WARNING to find out if this is
1155                  * ever called   --KG
1156                  */
1157         }
1158         ndev->trans_start = jiffies;
1159         netif_wake_queue(ndev);
1160 }
1161
1162 /*
1163  * Try sending a packet.
1164  * If this interface isn't connected to a ISDN-Channel, find a free channel,
1165  * and start dialing.
1166  */
1167 static int
1168 isdn_net_start_xmit(struct sk_buff *skb, struct net_device *ndev)
1169 {
1170         isdn_net_local *lp = (isdn_net_local *) ndev->priv;
1171 #ifdef CONFIG_ISDN_X25
1172         struct concap_proto * cprot = lp -> netdev -> cprot;
1173 /* At this point hard_start_xmit() passes control to the encapsulation
1174    protocol (if present).
1175    For X.25 auto-dialing is completly bypassed because:
1176    - It does not conform with the semantics of a reliable datalink
1177      service as needed by X.25 PLP.
1178    - I don't want that the interface starts dialing when the network layer
1179      sends a message which requests to disconnect the lapb link (or if it
1180      sends any other message not resulting in data transmission).
1181    Instead, dialing will be initiated by the encapsulation protocol entity
1182    when a dl_establish request is received from the upper layer.
1183 */
1184         if (cprot && cprot -> pops) {
1185                 int ret = cprot -> pops -> encap_and_xmit ( cprot , skb);
1186
1187                 if (ret)
1188                         netif_stop_queue(ndev);
1189                 return ret;
1190         } else
1191 #endif
1192         /* auto-dialing xmit function */
1193         {
1194 #ifdef ISDN_DEBUG_NET_DUMP
1195                 u_char *buf;
1196 #endif
1197                 isdn_net_adjust_hdr(skb, ndev);
1198 #ifdef ISDN_DEBUG_NET_DUMP
1199                 buf = skb->data;
1200                 isdn_dumppkt("S:", buf, skb->len, 40);
1201 #endif
1202
1203                 if (!(lp->flags & ISDN_NET_CONNECTED)) {
1204                         int chi;
1205                         /* only do autodial if allowed by config */
1206                         if (!(ISDN_NET_DIALMODE(*lp) == ISDN_NET_DM_AUTO)) {
1207                                 isdn_net_unreachable(ndev, skb, "dial rejected: interface not in dialmode `auto'");
1208                                 dev_kfree_skb(skb);
1209                                 return 0;
1210                         }
1211                         if (lp->phone[1]) {
1212                                 ulong flags;
1213
1214                                 if(lp->dialwait_timer <= 0)
1215                                         if(lp->dialstarted > 0 && lp->dialtimeout > 0 && time_before(jiffies, lp->dialstarted + lp->dialtimeout + lp->dialwait))
1216                                                 lp->dialwait_timer = lp->dialstarted + lp->dialtimeout + lp->dialwait;
1217
1218                                 if(lp->dialwait_timer > 0) {
1219                                         if(time_before(jiffies, lp->dialwait_timer)) {
1220                                                 isdn_net_unreachable(ndev, skb, "dial rejected: retry-time not reached");
1221                                                 dev_kfree_skb(skb);
1222                                                 return 0;
1223                                         } else
1224                                                 lp->dialwait_timer = 0;
1225                                 }
1226                                 /* Grab a free ISDN-Channel */
1227                                 spin_lock_irqsave(&dev->lock, flags);
1228                                 if (((chi =
1229                                      isdn_get_free_channel(
1230                                                         ISDN_USAGE_NET,
1231                                                         lp->l2_proto,
1232                                                         lp->l3_proto,
1233                                                         lp->pre_device,
1234                                                         lp->pre_channel,
1235                                                         lp->msn)
1236                                                         ) < 0) &&
1237                                         ((chi =
1238                                      isdn_get_free_channel(
1239                                                         ISDN_USAGE_NET,
1240                                                         lp->l2_proto,
1241                                                         lp->l3_proto,
1242                                                         lp->pre_device,
1243                                                         lp->pre_channel^1,
1244                                                         lp->msn)
1245                                                         ) < 0)) {
1246                                         spin_unlock_irqrestore(&dev->lock, flags);
1247                                         isdn_net_unreachable(ndev, skb,
1248                                                            "No channel");
1249                                         dev_kfree_skb(skb);
1250                                         return 0;
1251                                 }
1252                                 /* Log packet, which triggered dialing */
1253                                 if (dev->net_verbose)
1254                                         isdn_net_log_skb(skb, lp);
1255                                 lp->dialstate = 1;
1256                                 /* Connect interface with channel */
1257                                 isdn_net_bind_channel(lp, chi);
1258 #ifdef CONFIG_ISDN_PPP
1259                                 if (lp->p_encap == ISDN_NET_ENCAP_SYNCPPP) {
1260                                         /* no 'first_skb' handling for syncPPP */
1261                                         if (isdn_ppp_bind(lp) < 0) {
1262                                                 dev_kfree_skb(skb);
1263                                                 isdn_net_unbind_channel(lp);
1264                                                 spin_unlock_irqrestore(&dev->lock, flags);
1265                                                 return 0;       /* STN (skb to nirvana) ;) */
1266                                         }
1267 #ifdef CONFIG_IPPP_FILTER
1268                                         if (isdn_ppp_autodial_filter(skb, lp)) {
1269                                                 isdn_ppp_free(lp);
1270                                                 isdn_net_unbind_channel(lp);
1271                                                 spin_unlock_irqrestore(&dev->lock, flags);
1272                                                 isdn_net_unreachable(ndev, skb, "dial rejected: packet filtered");
1273                                                 dev_kfree_skb(skb);
1274                                                 return 0;
1275                                         }
1276 #endif
1277                                         spin_unlock_irqrestore(&dev->lock, flags);
1278                                         isdn_net_dial();        /* Initiate dialing */
1279                                         netif_stop_queue(ndev);
1280                                         return 1;       /* let upper layer requeue skb packet */
1281                                 }
1282 #endif
1283                                 /* Initiate dialing */
1284                                 spin_unlock_irqrestore(&dev->lock, flags);
1285                                 isdn_net_dial();
1286                                 isdn_net_device_stop_queue(lp);
1287                                 return 1;
1288                         } else {
1289                                 isdn_net_unreachable(ndev, skb,
1290                                                      "No phone number");
1291                                 dev_kfree_skb(skb);
1292                                 return 0;
1293                         }
1294                 } else {
1295                         /* Device is connected to an ISDN channel */
1296                         ndev->trans_start = jiffies;
1297                         if (!lp->dialstate) {
1298                                 /* ISDN connection is established, try sending */
1299                                 int ret;
1300                                 ret = (isdn_net_xmit(ndev, skb));
1301                                 if(ret) netif_stop_queue(ndev);
1302                                 return ret;
1303                         } else
1304                                 netif_stop_queue(ndev);
1305                 }
1306         }
1307         return 1;
1308 }
1309
1310 /*
1311  * Shutdown a net-interface.
1312  */
1313 static int
1314 isdn_net_close(struct net_device *dev)
1315 {
1316         struct net_device *p;
1317 #ifdef CONFIG_ISDN_X25
1318         struct concap_proto * cprot =
1319                 ( (isdn_net_local *) dev->priv ) -> netdev -> cprot;
1320         /* printk(KERN_DEBUG "isdn_net_close %s\n" , dev-> name ); */
1321 #endif
1322
1323 #ifdef CONFIG_ISDN_X25
1324         if( cprot && cprot -> pops ) cprot -> pops -> close( cprot );
1325 #endif
1326         netif_stop_queue(dev);
1327         if ((p = (((isdn_net_local *) dev->priv)->slave))) {
1328                 /* If this interface has slaves, stop them also */
1329                 while (p) {
1330 #ifdef CONFIG_ISDN_X25
1331                         cprot = ( (isdn_net_local *) p->priv )
1332                                 -> netdev -> cprot;
1333                         if( cprot && cprot -> pops )
1334                                 cprot -> pops -> close( cprot );
1335 #endif
1336                         isdn_net_hangup(p);
1337                         p = (((isdn_net_local *) p->priv)->slave);
1338                 }
1339         }
1340         isdn_net_hangup(dev);
1341         isdn_unlock_drivers();
1342         return 0;
1343 }
1344
1345 /*
1346  * Get statistics
1347  */
1348 static struct net_device_stats *
1349 isdn_net_get_stats(struct net_device *dev)
1350 {
1351         isdn_net_local *lp = (isdn_net_local *) dev->priv;
1352         return &lp->stats;
1353 }
1354
1355 /*      This is simply a copy from std. eth.c EXCEPT we pull ETH_HLEN
1356  *      instead of dev->hard_header_len off. This is done because the
1357  *      lowlevel-driver has already pulled off its stuff when we get
1358  *      here and this routine only gets called with p_encap == ETHER.
1359  *      Determine the packet's protocol ID. The rule here is that we
1360  *      assume 802.3 if the type field is short enough to be a length.
1361  *      This is normal practice and works for any 'now in use' protocol.
1362  */
1363
1364 static unsigned short
1365 isdn_net_type_trans(struct sk_buff *skb, struct net_device *dev)
1366 {
1367         struct ethhdr *eth;
1368         unsigned char *rawp;
1369
1370         skb_reset_mac_header(skb);
1371         skb_pull(skb, ETH_HLEN);
1372         eth = eth_hdr(skb);
1373
1374         if (*eth->h_dest & 1) {
1375                 if (memcmp(eth->h_dest, dev->broadcast, ETH_ALEN) == 0)
1376                         skb->pkt_type = PACKET_BROADCAST;
1377                 else
1378                         skb->pkt_type = PACKET_MULTICAST;
1379         }
1380         /*
1381          *      This ALLMULTI check should be redundant by 1.4
1382          *      so don't forget to remove it.
1383          */
1384
1385         else if (dev->flags & (IFF_PROMISC /*| IFF_ALLMULTI*/)) {
1386                 if (memcmp(eth->h_dest, dev->dev_addr, ETH_ALEN))
1387                         skb->pkt_type = PACKET_OTHERHOST;
1388         }
1389         if (ntohs(eth->h_proto) >= 1536)
1390                 return eth->h_proto;
1391
1392         rawp = skb->data;
1393
1394         /*
1395          *      This is a magic hack to spot IPX packets. Older Novell breaks
1396          *      the protocol design and runs IPX over 802.3 without an 802.2 LLC
1397          *      layer. We look for FFFF which isn't a used 802.2 SSAP/DSAP. This
1398          *      won't work for fault tolerant netware but does for the rest.
1399          */
1400         if (*(unsigned short *) rawp == 0xFFFF)
1401                 return htons(ETH_P_802_3);
1402         /*
1403          *      Real 802.2 LLC
1404          */
1405         return htons(ETH_P_802_2);
1406 }
1407
1408
1409 /*
1410  * CISCO HDLC keepalive specific stuff
1411  */
1412 static struct sk_buff*
1413 isdn_net_ciscohdlck_alloc_skb(isdn_net_local *lp, int len)
1414 {
1415         unsigned short hl = dev->drv[lp->isdn_device]->interface->hl_hdrlen;
1416         struct sk_buff *skb;
1417
1418         skb = alloc_skb(hl + len, GFP_ATOMIC);
1419         if (skb)
1420                 skb_reserve(skb, hl);
1421         else
1422                 printk("isdn out of mem at %s:%d!\n", __FILE__, __LINE__);
1423         return skb;
1424 }
1425
1426 /* cisco hdlck device private ioctls */
1427 static int
1428 isdn_ciscohdlck_dev_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd)
1429 {
1430         isdn_net_local *lp = (isdn_net_local *) dev->priv;
1431         unsigned long len = 0;
1432         unsigned long expires = 0;
1433         int tmp = 0;
1434         int period = lp->cisco_keepalive_period;
1435         s8 debserint = lp->cisco_debserint;
1436         int rc = 0;
1437
1438         if (lp->p_encap != ISDN_NET_ENCAP_CISCOHDLCK)
1439                 return -EINVAL;
1440
1441         switch (cmd) {
1442                 /* get/set keepalive period */
1443                 case SIOCGKEEPPERIOD:
1444                         len = (unsigned long)sizeof(lp->cisco_keepalive_period);
1445                         if (copy_to_user(ifr->ifr_data,
1446                                 &lp->cisco_keepalive_period, len))
1447                                 rc = -EFAULT;
1448                         break;
1449                 case SIOCSKEEPPERIOD:
1450                         tmp = lp->cisco_keepalive_period;
1451                         len = (unsigned long)sizeof(lp->cisco_keepalive_period);
1452                         if (copy_from_user(&period, ifr->ifr_data, len))
1453                                 rc = -EFAULT;
1454                         if ((period > 0) && (period <= 32767))
1455                                 lp->cisco_keepalive_period = period;
1456                         else
1457                                 rc = -EINVAL;
1458                         if (!rc && (tmp != lp->cisco_keepalive_period)) {
1459                                 expires = (unsigned long)(jiffies +
1460                                         lp->cisco_keepalive_period * HZ);
1461                                 mod_timer(&lp->cisco_timer, expires);
1462                                 printk(KERN_INFO "%s: Keepalive period set "
1463                                         "to %d seconds.\n",
1464                                         dev->name, lp->cisco_keepalive_period);
1465                         }
1466                         break;
1467
1468                 /* get/set debugging */
1469                 case SIOCGDEBSERINT:
1470                         len = (unsigned long)sizeof(lp->cisco_debserint);
1471                         if (copy_to_user(ifr->ifr_data,
1472                                 &lp->cisco_debserint, len))
1473                                 rc = -EFAULT;
1474                         break;
1475                 case SIOCSDEBSERINT:
1476                         len = (unsigned long)sizeof(lp->cisco_debserint);
1477                         if (copy_from_user(&debserint,
1478                                 ifr->ifr_data, len))
1479                                 rc = -EFAULT;
1480                         if ((debserint >= 0) && (debserint <= 64))
1481                                 lp->cisco_debserint = debserint;
1482                         else
1483                                 rc = -EINVAL;
1484                         break;
1485
1486                 default:
1487                         rc = -EINVAL;
1488                         break;
1489         }
1490         return (rc);
1491 }
1492
1493 /* called via cisco_timer.function */
1494 static void
1495 isdn_net_ciscohdlck_slarp_send_keepalive(unsigned long data)
1496 {
1497         isdn_net_local *lp = (isdn_net_local *) data;
1498         struct sk_buff *skb;
1499         unsigned char *p;
1500         unsigned long last_cisco_myseq = lp->cisco_myseq;
1501         int myseq_diff = 0;
1502
1503         if (!(lp->flags & ISDN_NET_CONNECTED) || lp->dialstate) {
1504                 printk("isdn BUG at %s:%d!\n", __FILE__, __LINE__);
1505                 return;
1506         }
1507         lp->cisco_myseq++;
1508
1509         myseq_diff = (lp->cisco_myseq - lp->cisco_mineseen);
1510         if ((lp->cisco_line_state) && ((myseq_diff >= 3)||(myseq_diff <= -3))) {
1511                 /* line up -> down */
1512                 lp->cisco_line_state = 0;
1513                 printk (KERN_WARNING
1514                                 "UPDOWN: Line protocol on Interface %s,"
1515                                 " changed state to down\n", lp->netdev->dev->name);
1516                 /* should stop routing higher-level data accross */
1517         } else if ((!lp->cisco_line_state) &&
1518                 (myseq_diff >= 0) && (myseq_diff <= 2)) {
1519                 /* line down -> up */
1520                 lp->cisco_line_state = 1;
1521                 printk (KERN_WARNING
1522                                 "UPDOWN: Line protocol on Interface %s,"
1523                                 " changed state to up\n", lp->netdev->dev->name);
1524                 /* restart routing higher-level data accross */
1525         }
1526
1527         if (lp->cisco_debserint)
1528                 printk (KERN_DEBUG "%s: HDLC "
1529                         "myseq %lu, mineseen %lu%c, yourseen %lu, %s\n",
1530                         lp->netdev->dev->name, last_cisco_myseq, lp->cisco_mineseen,
1531                         ((last_cisco_myseq == lp->cisco_mineseen) ? '*' : 040),
1532                         lp->cisco_yourseq,
1533                         ((lp->cisco_line_state) ? "line up" : "line down"));
1534
1535         skb = isdn_net_ciscohdlck_alloc_skb(lp, 4 + 14);
1536         if (!skb)
1537                 return;
1538
1539         p = skb_put(skb, 4 + 14);
1540
1541         /* cisco header */
1542         p += put_u8 (p, CISCO_ADDR_UNICAST);
1543         p += put_u8 (p, CISCO_CTRL);
1544         p += put_u16(p, CISCO_TYPE_SLARP);
1545
1546         /* slarp keepalive */
1547         p += put_u32(p, CISCO_SLARP_KEEPALIVE);
1548         p += put_u32(p, lp->cisco_myseq);
1549         p += put_u32(p, lp->cisco_yourseq);
1550         p += put_u16(p, 0xffff); // reliablity, always 0xffff
1551
1552         isdn_net_write_super(lp, skb);
1553
1554         lp->cisco_timer.expires = jiffies + lp->cisco_keepalive_period * HZ;
1555
1556         add_timer(&lp->cisco_timer);
1557 }
1558
1559 static void
1560 isdn_net_ciscohdlck_slarp_send_request(isdn_net_local *lp)
1561 {
1562         struct sk_buff *skb;
1563         unsigned char *p;
1564
1565         skb = isdn_net_ciscohdlck_alloc_skb(lp, 4 + 14);
1566         if (!skb)
1567                 return;
1568
1569         p = skb_put(skb, 4 + 14);
1570
1571         /* cisco header */
1572         p += put_u8 (p, CISCO_ADDR_UNICAST);
1573         p += put_u8 (p, CISCO_CTRL);
1574         p += put_u16(p, CISCO_TYPE_SLARP);
1575
1576         /* slarp request */
1577         p += put_u32(p, CISCO_SLARP_REQUEST);
1578         p += put_u32(p, 0); // address
1579         p += put_u32(p, 0); // netmask
1580         p += put_u16(p, 0); // unused
1581
1582         isdn_net_write_super(lp, skb);
1583 }
1584
1585 static void
1586 isdn_net_ciscohdlck_connected(isdn_net_local *lp)
1587 {
1588         lp->cisco_myseq = 0;
1589         lp->cisco_mineseen = 0;
1590         lp->cisco_yourseq = 0;
1591         lp->cisco_keepalive_period = ISDN_TIMER_KEEPINT;
1592         lp->cisco_last_slarp_in = 0;
1593         lp->cisco_line_state = 0;
1594         lp->cisco_debserint = 0;
1595
1596         /* send slarp request because interface/seq.no.s reset */
1597         isdn_net_ciscohdlck_slarp_send_request(lp);
1598
1599         init_timer(&lp->cisco_timer);
1600         lp->cisco_timer.data = (unsigned long) lp;
1601         lp->cisco_timer.function = isdn_net_ciscohdlck_slarp_send_keepalive;
1602         lp->cisco_timer.expires = jiffies + lp->cisco_keepalive_period * HZ;
1603         add_timer(&lp->cisco_timer);
1604 }
1605
1606 static void
1607 isdn_net_ciscohdlck_disconnected(isdn_net_local *lp)
1608 {
1609         del_timer(&lp->cisco_timer);
1610 }
1611
1612 static void
1613 isdn_net_ciscohdlck_slarp_send_reply(isdn_net_local *lp)
1614 {
1615         struct sk_buff *skb;
1616         unsigned char *p;
1617         struct in_device *in_dev = NULL;
1618         __be32 addr = 0;                /* local ipv4 address */
1619         __be32 mask = 0;                /* local netmask */
1620
1621         if ((in_dev = lp->netdev->dev->ip_ptr) != NULL) {
1622                 /* take primary(first) address of interface */
1623                 struct in_ifaddr *ifa = in_dev->ifa_list;
1624                 if (ifa != NULL) {
1625                         addr = ifa->ifa_local;
1626                         mask = ifa->ifa_mask;
1627                 }
1628         }
1629
1630         skb = isdn_net_ciscohdlck_alloc_skb(lp, 4 + 14);
1631         if (!skb)
1632                 return;
1633
1634         p = skb_put(skb, 4 + 14);
1635
1636         /* cisco header */
1637         p += put_u8 (p, CISCO_ADDR_UNICAST);
1638         p += put_u8 (p, CISCO_CTRL);
1639         p += put_u16(p, CISCO_TYPE_SLARP);
1640
1641         /* slarp reply, send own ip/netmask; if values are nonsense remote
1642          * should think we are unable to provide it with an address via SLARP */
1643         p += put_u32(p, CISCO_SLARP_REPLY);
1644         p += put_u32(p, addr);  // address
1645         p += put_u32(p, mask);  // netmask
1646         p += put_u16(p, 0);     // unused
1647
1648         isdn_net_write_super(lp, skb);
1649 }
1650
1651 static void
1652 isdn_net_ciscohdlck_slarp_in(isdn_net_local *lp, struct sk_buff *skb)
1653 {
1654         unsigned char *p;
1655         int period;
1656         u32 code;
1657         u32 my_seq;
1658         u32 your_seq;
1659         __be32 local;
1660         __be32 *addr, *mask;
1661         u16 unused;
1662
1663         if (skb->len < 14)
1664                 return;
1665
1666         p = skb->data;
1667         p += get_u32(p, &code);
1668
1669         switch (code) {
1670         case CISCO_SLARP_REQUEST:
1671                 lp->cisco_yourseq = 0;
1672                 isdn_net_ciscohdlck_slarp_send_reply(lp);
1673                 break;
1674         case CISCO_SLARP_REPLY:
1675                 addr = (__be32 *)p;
1676                 mask = (__be32 *)(p + 4);
1677                 if (*mask != cpu_to_be32(0xfffffffc))
1678                         goto slarp_reply_out;
1679                 if ((*addr & cpu_to_be32(3)) == cpu_to_be32(0) ||
1680                     (*addr & cpu_to_be32(3)) == cpu_to_be32(3))
1681                         goto slarp_reply_out;
1682                 local = *addr ^ cpu_to_be32(3);
1683                 printk(KERN_INFO "%s: got slarp reply: remote ip: %pI4, local ip: %pI4 mask: %pI4\n",
1684                        lp->netdev->dev->name, addr, &local, mask);
1685                 break;
1686   slarp_reply_out:
1687                 printk(KERN_INFO "%s: got invalid slarp reply (%pI4/%pI4) - ignored\n",
1688                        lp->netdev->dev->name, addr, mask);
1689                 break;
1690         case CISCO_SLARP_KEEPALIVE:
1691                 period = (int)((jiffies - lp->cisco_last_slarp_in
1692                                 + HZ/2 - 1) / HZ);
1693                 if (lp->cisco_debserint &&
1694                                 (period != lp->cisco_keepalive_period) &&
1695                                 lp->cisco_last_slarp_in) {
1696                         printk(KERN_DEBUG "%s: Keepalive period mismatch - "
1697                                 "is %d but should be %d.\n",
1698                                 lp->netdev->dev->name, period,
1699                                 lp->cisco_keepalive_period);
1700                 }
1701                 lp->cisco_last_slarp_in = jiffies;
1702                 p += get_u32(p, &my_seq);
1703                 p += get_u32(p, &your_seq);
1704                 p += get_u16(p, &unused);
1705                 lp->cisco_yourseq = my_seq;
1706                 lp->cisco_mineseen = your_seq;
1707                 break;
1708         }
1709 }
1710
1711 static void
1712 isdn_net_ciscohdlck_receive(isdn_net_local *lp, struct sk_buff *skb)
1713 {
1714         unsigned char *p;
1715         u8 addr;
1716         u8 ctrl;
1717         u16 type;
1718
1719         if (skb->len < 4)
1720                 goto out_free;
1721
1722         p = skb->data;
1723         p += get_u8 (p, &addr);
1724         p += get_u8 (p, &ctrl);
1725         p += get_u16(p, &type);
1726         skb_pull(skb, 4);
1727
1728         if (addr != CISCO_ADDR_UNICAST && addr != CISCO_ADDR_BROADCAST) {
1729                 printk(KERN_WARNING "%s: Unknown Cisco addr 0x%02x\n",
1730                        lp->netdev->dev->name, addr);
1731                 goto out_free;
1732         }
1733         if (ctrl != CISCO_CTRL) {
1734                 printk(KERN_WARNING "%s: Unknown Cisco ctrl 0x%02x\n",
1735                        lp->netdev->dev->name, ctrl);
1736                 goto out_free;
1737         }
1738
1739         switch (type) {
1740         case CISCO_TYPE_SLARP:
1741                 isdn_net_ciscohdlck_slarp_in(lp, skb);
1742                 goto out_free;
1743         case CISCO_TYPE_CDP:
1744                 if (lp->cisco_debserint)
1745                         printk(KERN_DEBUG "%s: Received CDP packet. use "
1746                                 "\"no cdp enable\" on cisco.\n",
1747                                 lp->netdev->dev->name);
1748                 goto out_free;
1749         default:
1750                 /* no special cisco protocol */
1751                 skb->protocol = htons(type);
1752                 netif_rx(skb);
1753                 return;
1754         }
1755
1756  out_free:
1757         kfree_skb(skb);
1758 }
1759
1760 /*
1761  * Got a packet from ISDN-Channel.
1762  */
1763 static void
1764 isdn_net_receive(struct net_device *ndev, struct sk_buff *skb)
1765 {
1766         isdn_net_local *lp = (isdn_net_local *) ndev->priv;
1767         isdn_net_local *olp = lp;       /* original 'lp' */
1768 #ifdef CONFIG_ISDN_X25
1769         struct concap_proto *cprot = lp -> netdev -> cprot;
1770 #endif
1771         lp->transcount += skb->len;
1772
1773         lp->stats.rx_packets++;
1774         lp->stats.rx_bytes += skb->len;
1775         if (lp->master) {
1776                 /* Bundling: If device is a slave-device, deliver to master, also
1777                  * handle master's statistics and hangup-timeout
1778                  */
1779                 ndev = lp->master;
1780                 lp = (isdn_net_local *) ndev->priv;
1781                 lp->stats.rx_packets++;
1782                 lp->stats.rx_bytes += skb->len;
1783         }
1784         skb->dev = ndev;
1785         skb->pkt_type = PACKET_HOST;
1786         skb_reset_mac_header(skb);
1787 #ifdef ISDN_DEBUG_NET_DUMP
1788         isdn_dumppkt("R:", skb->data, skb->len, 40);
1789 #endif
1790         switch (lp->p_encap) {
1791                 case ISDN_NET_ENCAP_ETHER:
1792                         /* Ethernet over ISDN */
1793                         olp->huptimer = 0;
1794                         lp->huptimer = 0;
1795                         skb->protocol = isdn_net_type_trans(skb, ndev);
1796                         break;
1797                 case ISDN_NET_ENCAP_UIHDLC:
1798                         /* HDLC with UI-frame (for ispa with -h1 option) */
1799                         olp->huptimer = 0;
1800                         lp->huptimer = 0;
1801                         skb_pull(skb, 2);
1802                         /* Fall through */
1803                 case ISDN_NET_ENCAP_RAWIP:
1804                         /* RAW-IP without MAC-Header */
1805                         olp->huptimer = 0;
1806                         lp->huptimer = 0;
1807                         skb->protocol = htons(ETH_P_IP);
1808                         break;
1809                 case ISDN_NET_ENCAP_CISCOHDLCK:
1810                         isdn_net_ciscohdlck_receive(lp, skb);
1811                         return;
1812                 case ISDN_NET_ENCAP_CISCOHDLC:
1813                         /* CISCO-HDLC IP with type field and  fake I-frame-header */
1814                         skb_pull(skb, 2);
1815                         /* Fall through */
1816                 case ISDN_NET_ENCAP_IPTYP:
1817                         /* IP with type field */
1818                         olp->huptimer = 0;
1819                         lp->huptimer = 0;
1820                         skb->protocol = *(unsigned short *) &(skb->data[0]);
1821                         skb_pull(skb, 2);
1822                         if (*(unsigned short *) skb->data == 0xFFFF)
1823                                 skb->protocol = htons(ETH_P_802_3);
1824                         break;
1825 #ifdef CONFIG_ISDN_PPP
1826                 case ISDN_NET_ENCAP_SYNCPPP:
1827                         /* huptimer is done in isdn_ppp_push_higher */
1828                         isdn_ppp_receive(lp->netdev, olp, skb);
1829                         return;
1830 #endif
1831
1832                 default:
1833 #ifdef CONFIG_ISDN_X25
1834                   /* try if there are generic sync_device receiver routines */
1835                         if(cprot) if(cprot -> pops)
1836                                 if( cprot -> pops -> data_ind){
1837                                         cprot -> pops -> data_ind(cprot,skb);
1838                                         return;
1839                                 };
1840 #endif /* CONFIG_ISDN_X25 */
1841                         printk(KERN_WARNING "%s: unknown encapsulation, dropping\n",
1842                                lp->netdev->dev->name);
1843                         kfree_skb(skb);
1844                         return;
1845         }
1846
1847         netif_rx(skb);
1848         return;
1849 }
1850
1851 /*
1852  * A packet arrived via ISDN. Search interface-chain for a corresponding
1853  * interface. If found, deliver packet to receiver-function and return 1,
1854  * else return 0.
1855  */
1856 int
1857 isdn_net_rcv_skb(int idx, struct sk_buff *skb)
1858 {
1859         isdn_net_dev *p = dev->rx_netdev[idx];
1860
1861         if (p) {
1862                 isdn_net_local *lp = p->local;
1863                 if ((lp->flags & ISDN_NET_CONNECTED) &&
1864                     (!lp->dialstate)) {
1865                         isdn_net_receive(p->dev, skb);
1866                         return 1;
1867                 }
1868         }
1869         return 0;
1870 }
1871
1872 /*
1873  *  build an header
1874  *  depends on encaps that is being used.
1875  */
1876
1877 static int isdn_net_header(struct sk_buff *skb, struct net_device *dev,
1878                            unsigned short type,
1879                            const void *daddr, const void *saddr, unsigned plen)
1880 {
1881         isdn_net_local *lp = dev->priv;
1882         unsigned char *p;
1883         ushort len = 0;
1884
1885         switch (lp->p_encap) {
1886                 case ISDN_NET_ENCAP_ETHER:
1887                         len = eth_header(skb, dev, type, daddr, saddr, plen);
1888                         break;
1889 #ifdef CONFIG_ISDN_PPP
1890                 case ISDN_NET_ENCAP_SYNCPPP:
1891                         /* stick on a fake header to keep fragmentation code happy. */
1892                         len = IPPP_MAX_HEADER;
1893                         skb_push(skb,len);
1894                         break;
1895 #endif
1896                 case ISDN_NET_ENCAP_RAWIP:
1897                         printk(KERN_WARNING "isdn_net_header called with RAW_IP!\n");
1898                         len = 0;
1899                         break;
1900                 case ISDN_NET_ENCAP_IPTYP:
1901                         /* ethernet type field */
1902                         *((ushort *) skb_push(skb, 2)) = htons(type);
1903                         len = 2;
1904                         break;
1905                 case ISDN_NET_ENCAP_UIHDLC:
1906                         /* HDLC with UI-Frames (for ispa with -h1 option) */
1907                         *((ushort *) skb_push(skb, 2)) = htons(0x0103);
1908                         len = 2;
1909                         break;
1910                 case ISDN_NET_ENCAP_CISCOHDLC:
1911                 case ISDN_NET_ENCAP_CISCOHDLCK:
1912                         p = skb_push(skb, 4);
1913                         p += put_u8 (p, CISCO_ADDR_UNICAST);
1914                         p += put_u8 (p, CISCO_CTRL);
1915                         p += put_u16(p, type);
1916                         len = 4;
1917                         break;
1918 #ifdef CONFIG_ISDN_X25
1919                 default:
1920                   /* try if there are generic concap protocol routines */
1921                         if( lp-> netdev -> cprot ){
1922                                 printk(KERN_WARNING "isdn_net_header called with concap_proto!\n");
1923                                 len = 0;
1924                                 break;
1925                         }
1926                         break;
1927 #endif /* CONFIG_ISDN_X25 */
1928         }
1929         return len;
1930 }
1931
1932 /* We don't need to send arp, because we have point-to-point connections. */
1933 static int
1934 isdn_net_rebuild_header(struct sk_buff *skb)
1935 {
1936         struct net_device *dev = skb->dev;
1937         isdn_net_local *lp = dev->priv;
1938         int ret = 0;
1939
1940         if (lp->p_encap == ISDN_NET_ENCAP_ETHER) {
1941                 struct ethhdr *eth = (struct ethhdr *) skb->data;
1942
1943                 /*
1944                  *      Only ARP/IP is currently supported
1945                  */
1946
1947                 if (eth->h_proto != htons(ETH_P_IP)) {
1948                         printk(KERN_WARNING
1949                                "isdn_net: %s don't know how to resolve type %d addresses?\n",
1950                                dev->name, (int) eth->h_proto);
1951                         memcpy(eth->h_source, dev->dev_addr, dev->addr_len);
1952                         return 0;
1953                 }
1954                 /*
1955                  *      Try to get ARP to resolve the header.
1956                  */
1957 #ifdef CONFIG_INET
1958                 ret = arp_find(eth->h_dest, skb);
1959 #endif
1960         }
1961         return ret;
1962 }
1963
1964 static int isdn_header_cache(const struct neighbour *neigh, struct hh_cache *hh)
1965 {
1966         const struct net_device *dev = neigh->dev;
1967         isdn_net_local *lp = dev->priv;
1968
1969         if (lp->p_encap == ISDN_NET_ENCAP_ETHER)
1970                 return eth_header_cache(neigh, hh);
1971         return -1;
1972 }
1973
1974 static void isdn_header_cache_update(struct hh_cache *hh,
1975                                      const struct net_device *dev,
1976                                      const unsigned char *haddr)
1977 {
1978         isdn_net_local *lp = dev->priv;
1979         if (lp->p_encap == ISDN_NET_ENCAP_ETHER)
1980                 return eth_header_cache_update(hh, dev, haddr);
1981 }
1982
1983 static const struct header_ops isdn_header_ops = {
1984         .create = isdn_net_header,
1985         .rebuild = isdn_net_rebuild_header,
1986         .cache = isdn_header_cache,
1987         .cache_update = isdn_header_cache_update,
1988 };
1989
1990 /*
1991  * Interface-setup. (just after registering a new interface)
1992  */
1993 static int
1994 isdn_net_init(struct net_device *ndev)
1995 {
1996         ushort max_hlhdr_len = 0;
1997         int drvidx;
1998
1999         ether_setup(ndev);
2000         ndev->header_ops = NULL;
2001
2002         /* Setup the generic properties */
2003         ndev->mtu = 1500;
2004         ndev->flags = IFF_NOARP|IFF_POINTOPOINT;
2005         ndev->type = ARPHRD_ETHER;
2006         ndev->addr_len = ETH_ALEN;
2007         ndev->validate_addr = NULL;
2008
2009         /* for clients with MPPP maybe higher values better */
2010         ndev->tx_queue_len = 30;
2011
2012         /* The ISDN-specific entries in the device structure. */
2013         ndev->open = &isdn_net_open;
2014         ndev->hard_start_xmit = &isdn_net_start_xmit;
2015
2016         /*
2017          *  up till binding we ask the protocol layer to reserve as much
2018          *  as we might need for HL layer
2019          */
2020
2021         for (drvidx = 0; drvidx < ISDN_MAX_DRIVERS; drvidx++)
2022                 if (dev->drv[drvidx])
2023                         if (max_hlhdr_len < dev->drv[drvidx]->interface->hl_hdrlen)
2024                                 max_hlhdr_len = dev->drv[drvidx]->interface->hl_hdrlen;
2025
2026         ndev->hard_header_len = ETH_HLEN + max_hlhdr_len;
2027         ndev->stop = &isdn_net_close;
2028         ndev->get_stats = &isdn_net_get_stats;
2029         ndev->do_ioctl = NULL;
2030         return 0;
2031 }
2032
2033 static void
2034 isdn_net_swapbind(int drvidx)
2035 {
2036         isdn_net_dev *p;
2037
2038 #ifdef ISDN_DEBUG_NET_ICALL
2039         printk(KERN_DEBUG "n_fi: swapping ch of %d\n", drvidx);
2040 #endif
2041         p = dev->netdev;
2042         while (p) {
2043                 if (p->local->pre_device == drvidx)
2044                         switch (p->local->pre_channel) {
2045                                 case 0:
2046                                         p->local->pre_channel = 1;
2047                                         break;
2048                                 case 1:
2049                                         p->local->pre_channel = 0;
2050                                         break;
2051                         }
2052                 p = (isdn_net_dev *) p->next;
2053         }
2054 }
2055
2056 static void
2057 isdn_net_swap_usage(int i1, int i2)
2058 {
2059         int u1 = dev->usage[i1] & ISDN_USAGE_EXCLUSIVE;
2060         int u2 = dev->usage[i2] & ISDN_USAGE_EXCLUSIVE;
2061
2062 #ifdef ISDN_DEBUG_NET_ICALL
2063         printk(KERN_DEBUG "n_fi: usage of %d and %d\n", i1, i2);
2064 #endif
2065         dev->usage[i1] &= ~ISDN_USAGE_EXCLUSIVE;
2066         dev->usage[i1] |= u2;
2067         dev->usage[i2] &= ~ISDN_USAGE_EXCLUSIVE;
2068         dev->usage[i2] |= u1;
2069         isdn_info_update();
2070 }
2071
2072 /*
2073  * An incoming call-request has arrived.
2074  * Search the interface-chain for an appropriate interface.
2075  * If found, connect the interface to the ISDN-channel and initiate
2076  * D- and B-Channel-setup. If secure-flag is set, accept only
2077  * configured phone-numbers. If callback-flag is set, initiate
2078  * callback-dialing.
2079  *
2080  * Return-Value: 0 = No appropriate interface for this call.
2081  *               1 = Call accepted
2082  *               2 = Reject call, wait cbdelay, then call back
2083  *               3 = Reject call
2084  *               4 = Wait cbdelay, then call back
2085  *               5 = No appropriate interface for this call,
2086  *                   would eventually match if CID was longer.
2087  */
2088
2089 int
2090 isdn_net_find_icall(int di, int ch, int idx, setup_parm *setup)
2091 {
2092         char *eaz;
2093         int si1;
2094         int si2;
2095         int ematch;
2096         int wret;
2097         int swapped;
2098         int sidx = 0;
2099         u_long flags;
2100         isdn_net_dev *p;
2101         isdn_net_phone *n;
2102         char nr[ISDN_MSNLEN];
2103         char *my_eaz;
2104
2105         /* Search name in netdev-chain */
2106         if (!setup->phone[0]) {
2107                 nr[0] = '0';
2108                 nr[1] = '\0';
2109                 printk(KERN_INFO "isdn_net: Incoming call without OAD, assuming '0'\n");
2110         } else
2111                 strlcpy(nr, setup->phone, ISDN_MSNLEN);
2112         si1 = (int) setup->si1;
2113         si2 = (int) setup->si2;
2114         if (!setup->eazmsn[0]) {
2115                 printk(KERN_WARNING "isdn_net: Incoming call without CPN, assuming '0'\n");
2116                 eaz = "0";
2117         } else
2118                 eaz = setup->eazmsn;
2119         if (dev->net_verbose > 1)
2120                 printk(KERN_INFO "isdn_net: call from %s,%d,%d -> %s\n", nr, si1, si2, eaz);
2121         /* Accept DATA and VOICE calls at this stage
2122          * local eaz is checked later for allowed call types
2123          */
2124         if ((si1 != 7) && (si1 != 1)) {
2125                 if (dev->net_verbose > 1)
2126                         printk(KERN_INFO "isdn_net: Service-Indicator not 1 or 7, ignored\n");
2127                 return 0;
2128         }
2129         n = (isdn_net_phone *) 0;
2130         p = dev->netdev;
2131         ematch = wret = swapped = 0;
2132 #ifdef ISDN_DEBUG_NET_ICALL
2133         printk(KERN_DEBUG "n_fi: di=%d ch=%d idx=%d usg=%d\n", di, ch, idx,
2134                 dev->usage[idx]);
2135 #endif
2136         while (p) {
2137                 int matchret;
2138                 isdn_net_local *lp = p->local;
2139
2140                 /* If last check has triggered as binding-swap, revert it */
2141                 switch (swapped) {
2142                         case 2:
2143                                 isdn_net_swap_usage(idx, sidx);
2144                                 /* fall through */
2145                         case 1:
2146                                 isdn_net_swapbind(di);
2147                                 break;
2148                 }
2149                 swapped = 0;
2150                 /* check acceptable call types for DOV */
2151                 my_eaz = isdn_map_eaz2msn(lp->msn, di);
2152                 if (si1 == 1) { /* it's a DOV call, check if we allow it */
2153                         if (*my_eaz == 'v' || *my_eaz == 'V' ||
2154                             *my_eaz == 'b' || *my_eaz == 'B')
2155                                 my_eaz++; /* skip to allow a match */
2156                         else
2157                                 my_eaz = NULL; /* force non match */
2158                 } else { /* it's a DATA call, check if we allow it */
2159                         if (*my_eaz == 'b' || *my_eaz == 'B')
2160                                 my_eaz++; /* skip to allow a match */
2161                 }
2162                 if (my_eaz)
2163                         matchret = isdn_msncmp(eaz, my_eaz);
2164                 else
2165                         matchret = 1;
2166                 if (!matchret)
2167                         ematch = 1;
2168
2169                 /* Remember if more numbers eventually can match */
2170                 if (matchret > wret)
2171                         wret = matchret;
2172 #ifdef ISDN_DEBUG_NET_ICALL
2173                 printk(KERN_DEBUG "n_fi: if='%s', l.msn=%s, l.flags=%d, l.dstate=%d\n",
2174                        p->dev->name, lp->msn, lp->flags, lp->dialstate);
2175 #endif
2176                 if ((!matchret) &&                                        /* EAZ is matching   */
2177                     (((!(lp->flags & ISDN_NET_CONNECTED)) &&              /* but not connected */
2178                       (USG_NONE(dev->usage[idx]))) ||                     /* and ch. unused or */
2179                      ((((lp->dialstate == 4) || (lp->dialstate == 12)) && /* if dialing        */
2180                        (!(lp->flags & ISDN_NET_CALLBACK)))                /* but no callback   */
2181                      )))
2182                          {
2183 #ifdef ISDN_DEBUG_NET_ICALL
2184                         printk(KERN_DEBUG "n_fi: match1, pdev=%d pch=%d\n",
2185                                lp->pre_device, lp->pre_channel);
2186 #endif
2187                         if (dev->usage[idx] & ISDN_USAGE_EXCLUSIVE) {
2188                                 if ((lp->pre_channel != ch) ||
2189                                     (lp->pre_device != di)) {
2190                                         /* Here we got a problem:
2191                                          * If using an ICN-Card, an incoming call is always signaled on
2192                                          * on the first channel of the card, if both channels are
2193                                          * down. However this channel may be bound exclusive. If the
2194                                          * second channel is free, this call should be accepted.
2195                                          * The solution is horribly but it runs, so what:
2196                                          * We exchange the exclusive bindings of the two channels, the
2197                                          * corresponding variables in the interface-structs.
2198                                          */
2199                                         if (ch == 0) {
2200                                                 sidx = isdn_dc2minor(di, 1);
2201 #ifdef ISDN_DEBUG_NET_ICALL
2202                                                 printk(KERN_DEBUG "n_fi: ch is 0\n");
2203 #endif
2204                                                 if (USG_NONE(dev->usage[sidx])) {
2205                                                         /* Second Channel is free, now see if it is bound
2206                                                          * exclusive too. */
2207                                                         if (dev->usage[sidx] & ISDN_USAGE_EXCLUSIVE) {
2208 #ifdef ISDN_DEBUG_NET_ICALL
2209                                                                 printk(KERN_DEBUG "n_fi: 2nd channel is down and bound\n");
2210 #endif
2211                                                                 /* Yes, swap bindings only, if the original
2212                                                                  * binding is bound to channel 1 of this driver */
2213                                                                 if ((lp->pre_device == di) &&
2214                                                                     (lp->pre_channel == 1)) {
2215                                                                         isdn_net_swapbind(di);
2216                                                                         swapped = 1;
2217                                                                 } else {
2218                                                                         /* ... else iterate next device */
2219                                                                         p = (isdn_net_dev *) p->next;
2220                                                                         continue;
2221                                                                 }
2222                                                         } else {
2223 #ifdef ISDN_DEBUG_NET_ICALL
2224                                                                 printk(KERN_DEBUG "n_fi: 2nd channel is down and unbound\n");
2225 #endif
2226                                                                 /* No, swap always and swap excl-usage also */
2227                                                                 isdn_net_swap_usage(idx, sidx);
2228                                                                 isdn_net_swapbind(di);
2229                                                                 swapped = 2;
2230                                                         }
2231                                                         /* Now check for exclusive binding again */
2232 #ifdef ISDN_DEBUG_NET_ICALL
2233                                                         printk(KERN_DEBUG "n_fi: final check\n");
2234 #endif
2235                                                         if ((dev->usage[idx] & ISDN_USAGE_EXCLUSIVE) &&
2236                                                             ((lp->pre_channel != ch) ||
2237                                                              (lp->pre_device != di))) {
2238 #ifdef ISDN_DEBUG_NET_ICALL
2239                                                                 printk(KERN_DEBUG "n_fi: final check failed\n");
2240 #endif
2241                                                                 p = (isdn_net_dev *) p->next;
2242                                                                 continue;
2243                                                         }
2244                                                 }
2245                                         } else {
2246                                                 /* We are already on the second channel, so nothing to do */
2247 #ifdef ISDN_DEBUG_NET_ICALL
2248                                                 printk(KERN_DEBUG "n_fi: already on 2nd channel\n");
2249 #endif
2250                                         }
2251                                 }
2252                         }
2253 #ifdef ISDN_DEBUG_NET_ICALL
2254                         printk(KERN_DEBUG "n_fi: match2\n");
2255 #endif
2256                         n = lp->phone[0];
2257                         if (lp->flags & ISDN_NET_SECURE) {
2258                                 while (n) {
2259                                         if (!isdn_msncmp(nr, n->num))
2260                                                 break;
2261                                         n = (isdn_net_phone *) n->next;
2262                                 }
2263                         }
2264                         if (n || (!(lp->flags & ISDN_NET_SECURE))) {
2265 #ifdef ISDN_DEBUG_NET_ICALL
2266                                 printk(KERN_DEBUG "n_fi: match3\n");
2267 #endif
2268                                 /* matching interface found */
2269
2270                                 /*
2271                                  * Is the state STOPPED?
2272                                  * If so, no dialin is allowed,
2273                                  * so reject actively.
2274                                  * */
2275                                 if (ISDN_NET_DIALMODE(*lp) == ISDN_NET_DM_OFF) {
2276                                         printk(KERN_INFO "incoming call, interface %s `stopped' -> rejected\n",
2277                                                p->dev->name);
2278                                         return 3;
2279                                 }
2280                                 /*
2281                                  * Is the interface up?
2282                                  * If not, reject the call actively.
2283                                  */
2284                                 if (!isdn_net_device_started(p)) {
2285                                         printk(KERN_INFO "%s: incoming call, interface down -> rejected\n",
2286                                                p->dev->name);
2287                                         return 3;
2288                                 }
2289                                 /* Interface is up, now see if it's a slave. If so, see if
2290                                  * it's master and parent slave is online. If not, reject the call.
2291                                  */
2292                                 if (lp->master) {
2293                                         isdn_net_local *mlp = (isdn_net_local *) lp->master->priv;
2294                                         printk(KERN_DEBUG "ICALLslv: %s\n", p->dev->name);
2295                                         printk(KERN_DEBUG "master=%s\n", lp->master->name);
2296                                         if (mlp->flags & ISDN_NET_CONNECTED) {
2297                                                 printk(KERN_DEBUG "master online\n");
2298                                                 /* Master is online, find parent-slave (master if first slave) */
2299                                                 while (mlp->slave) {
2300                                                         if ((isdn_net_local *) mlp->slave->priv == lp)
2301                                                                 break;
2302                                                         mlp = (isdn_net_local *) mlp->slave->priv;
2303                                                 }
2304                                         } else
2305                                                 printk(KERN_DEBUG "master offline\n");
2306                                         /* Found parent, if it's offline iterate next device */
2307                                         printk(KERN_DEBUG "mlpf: %d\n", mlp->flags & ISDN_NET_CONNECTED);
2308                                         if (!(mlp->flags & ISDN_NET_CONNECTED)) {
2309                                                 p = (isdn_net_dev *) p->next;
2310                                                 continue;
2311                                         }
2312                                 }
2313                                 if (lp->flags & ISDN_NET_CALLBACK) {
2314                                         int chi;
2315                                         /*
2316                                          * Is the state MANUAL?
2317                                          * If so, no callback can be made,
2318                                          * so reject actively.
2319                                          * */
2320                                         if (ISDN_NET_DIALMODE(*lp) == ISDN_NET_DM_OFF) {
2321                                                 printk(KERN_INFO "incoming call for callback, interface %s `off' -> rejected\n",
2322                                                        p->dev->name);
2323                                                 return 3;
2324                                         }
2325                                         printk(KERN_DEBUG "%s: call from %s -> %s, start callback\n",
2326                                                p->dev->name, nr, eaz);
2327                                         if (lp->phone[1]) {
2328                                                 /* Grab a free ISDN-Channel */
2329                                                 spin_lock_irqsave(&dev->lock, flags);
2330                                                 if ((chi =
2331                                                         isdn_get_free_channel(
2332                                                                 ISDN_USAGE_NET,
2333                                                                 lp->l2_proto,
2334                                                                 lp->l3_proto,
2335                                                                 lp->pre_device,
2336                                                                 lp->pre_channel,
2337                                                                 lp->msn)
2338                                                                 ) < 0) {
2339
2340                                                         printk(KERN_WARNING "isdn_net_find_icall: No channel for %s\n",
2341                                                                 p->dev->name);
2342                                                         spin_unlock_irqrestore(&dev->lock, flags);
2343                                                         return 0;
2344                                                 }
2345                                                 /* Setup dialstate. */
2346                                                 lp->dtimer = 0;
2347                                                 lp->dialstate = 11;
2348                                                 /* Connect interface with channel */
2349                                                 isdn_net_bind_channel(lp, chi);
2350 #ifdef CONFIG_ISDN_PPP
2351                                                 if (lp->p_encap == ISDN_NET_ENCAP_SYNCPPP)
2352                                                         if (isdn_ppp_bind(lp) < 0) {
2353                                                                 spin_unlock_irqrestore(&dev->lock, flags);
2354                                                                 isdn_net_unbind_channel(lp);
2355                                                                 return 0;
2356                                                         }
2357 #endif
2358                                                 spin_unlock_irqrestore(&dev->lock, flags);
2359                                                 /* Initiate dialing by returning 2 or 4 */
2360                                                 return (lp->flags & ISDN_NET_CBHUP) ? 2 : 4;
2361                                         } else
2362                                                 printk(KERN_WARNING "isdn_net: %s: No phone number\n",
2363                                                         p->dev->name);
2364                                         return 0;
2365                                 } else {
2366                                         printk(KERN_DEBUG "%s: call from %s -> %s accepted\n",
2367                                                 p->dev->name, nr, eaz);
2368                                         /* if this interface is dialing, it does it probably on a different
2369                                            device, so free this device */
2370                                         if ((lp->dialstate == 4) || (lp->dialstate == 12)) {
2371 #ifdef CONFIG_ISDN_PPP
2372                                                 if (lp->p_encap == ISDN_NET_ENCAP_SYNCPPP)
2373                                                         isdn_ppp_free(lp);
2374 #endif
2375                                                 isdn_net_lp_disconnected(lp);
2376                                                 isdn_free_channel(lp->isdn_device, lp->isdn_channel,
2377                                                          ISDN_USAGE_NET);
2378                                         }
2379                                         spin_lock_irqsave(&dev->lock, flags);
2380                                         dev->usage[idx] &= ISDN_USAGE_EXCLUSIVE;
2381                                         dev->usage[idx] |= ISDN_USAGE_NET;
2382                                         strcpy(dev->num[idx], nr);
2383                                         isdn_info_update();
2384                                         dev->st_netdev[idx] = lp->netdev;
2385                                         lp->isdn_device = di;
2386                                         lp->isdn_channel = ch;
2387                                         lp->ppp_slot = -1;
2388                                         lp->flags |= ISDN_NET_CONNECTED;
2389                                         lp->dialstate = 7;
2390                                         lp->dtimer = 0;
2391                                         lp->outgoing = 0;
2392                                         lp->huptimer = 0;
2393                                         lp->hupflags |= ISDN_WAITCHARGE;
2394                                         lp->hupflags &= ~ISDN_HAVECHARGE;
2395 #ifdef CONFIG_ISDN_PPP
2396                                         if (lp->p_encap == ISDN_NET_ENCAP_SYNCPPP) {
2397                                                 if (isdn_ppp_bind(lp) < 0) {
2398                                                         isdn_net_unbind_channel(lp);
2399                                                         spin_unlock_irqrestore(&dev->lock, flags);
2400                                                         return 0;
2401                                                 }
2402                                         }
2403 #endif
2404                                         spin_unlock_irqrestore(&dev->lock, flags);
2405                                         return 1;
2406                                 }
2407                         }
2408                 }
2409                 p = (isdn_net_dev *) p->next;
2410         }
2411         /* If none of configured EAZ/MSN matched and not verbose, be silent */
2412         if (!ematch || dev->net_verbose)
2413                 printk(KERN_INFO "isdn_net: call from %s -> %d %s ignored\n", nr, di, eaz);
2414         return (wret == 2)?5:0;
2415 }
2416
2417 /*
2418  * Search list of net-interfaces for an interface with given name.
2419  */
2420 isdn_net_dev *
2421 isdn_net_findif(char *name)
2422 {
2423         isdn_net_dev *p = dev->netdev;
2424
2425         while (p) {
2426                 if (!strcmp(p->dev->name, name))
2427                         return p;
2428                 p = (isdn_net_dev *) p->next;
2429         }
2430         return (isdn_net_dev *) NULL;
2431 }
2432
2433 /*
2434  * Force a net-interface to dial out.
2435  * This is called from the userlevel-routine below or
2436  * from isdn_net_start_xmit().
2437  */
2438 static int
2439 isdn_net_force_dial_lp(isdn_net_local * lp)
2440 {
2441         if ((!(lp->flags & ISDN_NET_CONNECTED)) && !lp->dialstate) {
2442                 int chi;
2443                 if (lp->phone[1]) {
2444                         ulong flags;
2445
2446                         /* Grab a free ISDN-Channel */
2447                         spin_lock_irqsave(&dev->lock, flags);
2448                         if ((chi = isdn_get_free_channel(
2449                                         ISDN_USAGE_NET,
2450                                         lp->l2_proto,
2451                                         lp->l3_proto,
2452                                         lp->pre_device,
2453                                         lp->pre_channel,
2454                                         lp->msn)) < 0) {
2455                                 printk(KERN_WARNING "isdn_net_force_dial: No channel for %s\n",
2456                                         lp->netdev->dev->name);
2457                                 spin_unlock_irqrestore(&dev->lock, flags);
2458                                 return -EAGAIN;
2459                         }
2460                         lp->dialstate = 1;
2461                         /* Connect interface with channel */
2462                         isdn_net_bind_channel(lp, chi);
2463 #ifdef CONFIG_ISDN_PPP
2464                         if (lp->p_encap == ISDN_NET_ENCAP_SYNCPPP)
2465                                 if (isdn_ppp_bind(lp) < 0) {
2466                                         isdn_net_unbind_channel(lp);
2467                                         spin_unlock_irqrestore(&dev->lock, flags);
2468                                         return -EAGAIN;
2469                                 }
2470 #endif
2471                         /* Initiate dialing */
2472                         spin_unlock_irqrestore(&dev->lock, flags);
2473                         isdn_net_dial();
2474                         return 0;
2475                 } else
2476                         return -EINVAL;
2477         } else
2478                 return -EBUSY;
2479 }
2480
2481 /*
2482  * This is called from certain upper protocol layers (multilink ppp
2483  * and x25iface encapsulation module) that want to initiate dialing
2484  * themselves.
2485  */
2486 int
2487 isdn_net_dial_req(isdn_net_local * lp)
2488 {
2489         /* is there a better error code? */
2490         if (!(ISDN_NET_DIALMODE(*lp) == ISDN_NET_DM_AUTO)) return -EBUSY;
2491
2492         return isdn_net_force_dial_lp(lp);
2493 }
2494
2495 /*
2496  * Force a net-interface to dial out.
2497  * This is always called from within userspace (ISDN_IOCTL_NET_DIAL).
2498  */
2499 int
2500 isdn_net_force_dial(char *name)
2501 {
2502         isdn_net_dev *p = isdn_net_findif(name);
2503
2504         if (!p)
2505                 return -ENODEV;
2506         return (isdn_net_force_dial_lp(p->local));
2507 }
2508
2509 /*
2510  * Helper for alloc_netdev()
2511  */
2512 static void _isdn_setup(struct net_device *dev)
2513 {
2514         isdn_net_local *lp = dev->priv;
2515
2516         dev->flags = IFF_NOARP | IFF_POINTOPOINT;
2517         lp->p_encap = ISDN_NET_ENCAP_RAWIP;
2518         lp->magic = ISDN_NET_MAGIC;
2519         lp->last = lp;
2520         lp->next = lp;
2521         lp->isdn_device = -1;
2522         lp->isdn_channel = -1;
2523         lp->pre_device = -1;
2524         lp->pre_channel = -1;
2525         lp->exclusive = -1;
2526         lp->ppp_slot = -1;
2527         lp->pppbind = -1;
2528         skb_queue_head_init(&lp->super_tx_queue);
2529         lp->l2_proto = ISDN_PROTO_L2_X75I;
2530         lp->l3_proto = ISDN_PROTO_L3_TRANS;
2531         lp->triggercps = 6000;
2532         lp->slavedelay = 10 * HZ;
2533         lp->hupflags = ISDN_INHUP;      /* Do hangup even on incoming calls */
2534         lp->onhtime = 10;       /* Default hangup-time for saving costs */
2535         lp->dialmax = 1;
2536         /* Hangup before Callback, manual dial */
2537         lp->flags = ISDN_NET_CBHUP | ISDN_NET_DM_MANUAL;
2538         lp->cbdelay = 25;       /* Wait 5 secs before Callback */
2539         lp->dialtimeout = -1;  /* Infinite Dial-Timeout */
2540         lp->dialwait = 5 * HZ; /* Wait 5 sec. after failed dial */
2541         lp->dialstarted = 0;   /* Jiffies of last dial-start */
2542         lp->dialwait_timer = 0;  /* Jiffies of earliest next dial-start */
2543 }
2544
2545 /*
2546  * Allocate a new network-interface and initialize its data structures.
2547  */
2548 char *
2549 isdn_net_new(char *name, struct net_device *master)
2550 {
2551         isdn_net_dev *netdev;
2552
2553         /* Avoid creating an existing interface */
2554         if (isdn_net_findif(name)) {
2555                 printk(KERN_WARNING "isdn_net: interface %s already exists\n", name);
2556                 return NULL;
2557         }
2558         if (name == NULL)
2559                 return NULL;
2560         if (!(netdev = kzalloc(sizeof(isdn_net_dev), GFP_KERNEL))) {
2561                 printk(KERN_WARNING "isdn_net: Could not allocate net-device\n");
2562                 return NULL;
2563         }
2564         netdev->dev = alloc_netdev(sizeof(isdn_net_local), name, _isdn_setup);
2565         if (!netdev->dev) {
2566                 printk(KERN_WARNING "isdn_net: Could not allocate network device\n");
2567                 kfree(netdev);
2568                 return NULL;
2569         }
2570         netdev->local = netdev->dev->priv;
2571         netdev->dev->init = isdn_net_init;
2572         if (master) {
2573                 /* Device shall be a slave */
2574                 struct net_device *p = (((isdn_net_local *) master->priv)->slave);
2575                 struct net_device *q = master;
2576
2577                 netdev->local->master = master;
2578                 /* Put device at end of slave-chain */
2579                 while (p) {
2580                         q = p;
2581                         p = (((isdn_net_local *) p->priv)->slave);
2582                 }
2583                 ((isdn_net_local *) q->priv)->slave = netdev->dev;
2584         } else {
2585                 /* Device shall be a master */
2586                 /*
2587                  * Watchdog timer (currently) for master only.
2588                  */
2589                 netdev->dev->tx_timeout = isdn_net_tx_timeout;
2590                 netdev->dev->watchdog_timeo = ISDN_NET_TX_TIMEOUT;
2591                 if (register_netdev(netdev->dev) != 0) {
2592                         printk(KERN_WARNING "isdn_net: Could not register net-device\n");
2593                         free_netdev(netdev->dev);
2594                         kfree(netdev);
2595                         return NULL;
2596                 }
2597         }
2598         netdev->queue = netdev->local;
2599         spin_lock_init(&netdev->queue_lock);
2600
2601         netdev->local->netdev = netdev;
2602
2603         INIT_WORK(&netdev->local->tqueue, isdn_net_softint);
2604         spin_lock_init(&netdev->local->xmit_lock);
2605
2606         /* Put into to netdev-chain */
2607         netdev->next = (void *) dev->netdev;
2608         dev->netdev = netdev;
2609         return netdev->dev->name;
2610 }
2611
2612 char *
2613 isdn_net_newslave(char *parm)
2614 {
2615         char *p = strchr(parm, ',');
2616         isdn_net_dev *n;
2617         char newname[10];
2618
2619         if (p) {
2620                 /* Slave-Name MUST not be empty */
2621                 if (!strlen(p + 1))
2622                         return NULL;
2623                 strcpy(newname, p + 1);
2624                 *p = 0;
2625                 /* Master must already exist */
2626                 if (!(n = isdn_net_findif(parm)))
2627                         return NULL;
2628                 /* Master must be a real interface, not a slave */
2629                 if (n->local->master)
2630                         return NULL;
2631                 /* Master must not be started yet */
2632                 if (isdn_net_device_started(n))
2633                         return NULL;
2634                 return (isdn_net_new(newname, n->dev));
2635         }
2636         return NULL;
2637 }
2638
2639 /*
2640  * Set interface-parameters.
2641  * Always set all parameters, so the user-level application is responsible
2642  * for not overwriting existing setups. It has to get the current
2643  * setup first, if only selected parameters are to be changed.
2644  */
2645 int
2646 isdn_net_setcfg(isdn_net_ioctl_cfg * cfg)
2647 {
2648         isdn_net_dev *p = isdn_net_findif(cfg->name);
2649         ulong features;
2650         int i;
2651         int drvidx;
2652         int chidx;
2653         char drvid[25];
2654
2655         if (p) {
2656                 isdn_net_local *lp = p->local;
2657
2658                 /* See if any registered driver supports the features we want */
2659                 features = ((1 << cfg->l2_proto) << ISDN_FEATURE_L2_SHIFT) |
2660                         ((1 << cfg->l3_proto) << ISDN_FEATURE_L3_SHIFT);
2661                 for (i = 0; i < ISDN_MAX_DRIVERS; i++)
2662                         if (dev->drv[i])
2663                                 if ((dev->drv[i]->interface->features & features) == features)
2664                                         break;
2665                 if (i == ISDN_MAX_DRIVERS) {
2666                         printk(KERN_WARNING "isdn_net: No driver with selected features\n");
2667                         return -ENODEV;
2668                 }
2669                 if (lp->p_encap != cfg->p_encap){
2670 #ifdef CONFIG_ISDN_X25
2671                         struct concap_proto * cprot = p -> cprot;
2672 #endif
2673                         if (isdn_net_device_started(p)) {
2674                                 printk(KERN_WARNING "%s: cannot change encap when if is up\n",
2675                                        p->dev->name);
2676                                 return -EBUSY;
2677                         }
2678 #ifdef CONFIG_ISDN_X25
2679                         if( cprot && cprot -> pops )
2680                                 cprot -> pops -> proto_del ( cprot );
2681                         p -> cprot = NULL;
2682                         lp -> dops = NULL;
2683                         /* ... ,  prepare for configuration of new one ... */
2684                         switch ( cfg -> p_encap ){
2685                         case ISDN_NET_ENCAP_X25IFACE:
2686                                 lp -> dops = &isdn_concap_reliable_dl_dops;
2687                         }
2688                         /* ... and allocate new one ... */
2689                         p -> cprot = isdn_concap_new( cfg -> p_encap );
2690                         /* p -> cprot == NULL now if p_encap is not supported
2691                            by means of the concap_proto mechanism */
2692                         /* the protocol is not configured yet; this will
2693                            happen later when isdn_net_reset() is called */
2694 #endif
2695                 }
2696                 switch ( cfg->p_encap ) {
2697                 case ISDN_NET_ENCAP_SYNCPPP:
2698 #ifndef CONFIG_ISDN_PPP
2699                         printk(KERN_WARNING "%s: SyncPPP support not configured\n",
2700                                p->dev->name);
2701                         return -EINVAL;
2702 #else
2703                         p->dev->type = ARPHRD_PPP;      /* change ARP type */
2704                         p->dev->addr_len = 0;
2705                         p->dev->do_ioctl = isdn_ppp_dev_ioctl;
2706 #endif
2707                         break;
2708                 case ISDN_NET_ENCAP_X25IFACE:
2709 #ifndef CONFIG_ISDN_X25
2710                         printk(KERN_WARNING "%s: isdn-x25 support not configured\n",
2711                                p->dev->name);
2712                         return -EINVAL;
2713 #else
2714                         p->dev->type = ARPHRD_X25;      /* change ARP type */
2715                         p->dev->addr_len = 0;
2716 #endif
2717                         break;
2718                 case ISDN_NET_ENCAP_CISCOHDLCK:
2719                         p->dev->do_ioctl = isdn_ciscohdlck_dev_ioctl;
2720                         break;
2721                 default:
2722                         if( cfg->p_encap >= 0 &&
2723                             cfg->p_encap <= ISDN_NET_ENCAP_MAX_ENCAP )
2724                                 break;
2725                         printk(KERN_WARNING
2726                                "%s: encapsulation protocol %d not supported\n",
2727                                p->dev->name, cfg->p_encap);
2728                         return -EINVAL;
2729                 }
2730                 if (strlen(cfg->drvid)) {
2731                         /* A bind has been requested ... */
2732                         char *c,
2733                         *e;
2734
2735                         drvidx = -1;
2736                         chidx = -1;
2737                         strcpy(drvid, cfg->drvid);
2738                         if ((c = strchr(drvid, ','))) {
2739                                 /* The channel-number is appended to the driver-Id with a comma */
2740                                 chidx = (int) simple_strtoul(c + 1, &e, 10);
2741                                 if (e == c)
2742                                         chidx = -1;
2743                                 *c = '\0';
2744                         }
2745                         for (i = 0; i < ISDN_MAX_DRIVERS; i++)
2746                                 /* Lookup driver-Id in array */
2747                                 if (!(strcmp(dev->drvid[i], drvid))) {
2748                                         drvidx = i;
2749                                         break;
2750                                 }
2751                         if ((drvidx == -1) || (chidx == -1))
2752                                 /* Either driver-Id or channel-number invalid */
2753                                 return -ENODEV;
2754                 } else {
2755                         /* Parameters are valid, so get them */
2756                         drvidx = lp->pre_device;
2757                         chidx = lp->pre_channel;
2758                 }
2759                 if (cfg->exclusive > 0) {
2760                         unsigned long flags;
2761
2762                         /* If binding is exclusive, try to grab the channel */
2763                         spin_lock_irqsave(&dev->lock, flags);
2764                         if ((i = isdn_get_free_channel(ISDN_USAGE_NET,
2765                                 lp->l2_proto, lp->l3_proto, drvidx,
2766                                 chidx, lp->msn)) < 0) {
2767                                 /* Grab failed, because desired channel is in use */
2768                                 lp->exclusive = -1;
2769                                 spin_unlock_irqrestore(&dev->lock, flags);
2770                                 return -EBUSY;
2771                         }
2772                         /* All went ok, so update isdninfo */
2773                         dev->usage[i] = ISDN_USAGE_EXCLUSIVE;
2774                         isdn_info_update();
2775                         spin_unlock_irqrestore(&dev->lock, flags);
2776                         lp->exclusive = i;
2777                 } else {
2778                         /* Non-exclusive binding or unbind. */
2779                         lp->exclusive = -1;
2780                         if ((lp->pre_device != -1) && (cfg->exclusive == -1)) {
2781                                 isdn_unexclusive_channel(lp->pre_device, lp->pre_channel);
2782                                 isdn_free_channel(lp->pre_device, lp->pre_channel, ISDN_USAGE_NET);
2783                                 drvidx = -1;
2784                                 chidx = -1;
2785                         }
2786                 }
2787                 strlcpy(lp->msn, cfg->eaz, sizeof(lp->msn));
2788                 lp->pre_device = drvidx;
2789                 lp->pre_channel = chidx;
2790                 lp->onhtime = cfg->onhtime;
2791                 lp->charge = cfg->charge;
2792                 lp->l2_proto = cfg->l2_proto;
2793                 lp->l3_proto = cfg->l3_proto;
2794                 lp->cbdelay = cfg->cbdelay;
2795                 lp->dialmax = cfg->dialmax;
2796                 lp->triggercps = cfg->triggercps;
2797                 lp->slavedelay = cfg->slavedelay * HZ;
2798                 lp->pppbind = cfg->pppbind;
2799                 lp->dialtimeout = cfg->dialtimeout >= 0 ? cfg->dialtimeout * HZ : -1;
2800                 lp->dialwait = cfg->dialwait * HZ;
2801                 if (cfg->secure)
2802                         lp->flags |= ISDN_NET_SECURE;
2803                 else
2804                         lp->flags &= ~ISDN_NET_SECURE;
2805                 if (cfg->cbhup)
2806                         lp->flags |= ISDN_NET_CBHUP;
2807                 else
2808                         lp->flags &= ~ISDN_NET_CBHUP;
2809                 switch (cfg->callback) {
2810                         case 0:
2811                                 lp->flags &= ~(ISDN_NET_CALLBACK | ISDN_NET_CBOUT);
2812                                 break;
2813                         case 1:
2814                                 lp->flags |= ISDN_NET_CALLBACK;
2815                                 lp->flags &= ~ISDN_NET_CBOUT;
2816                                 break;
2817                         case 2:
2818                                 lp->flags |= ISDN_NET_CBOUT;
2819                                 lp->flags &= ~ISDN_NET_CALLBACK;
2820                                 break;
2821                 }
2822                 lp->flags &= ~ISDN_NET_DIALMODE_MASK;   /* first all bits off */
2823                 if (cfg->dialmode && !(cfg->dialmode & ISDN_NET_DIALMODE_MASK)) {
2824                         /* old isdnctrl version, where only 0 or 1 is given */
2825                         printk(KERN_WARNING
2826                              "Old isdnctrl version detected! Please update.\n");
2827                         lp->flags |= ISDN_NET_DM_OFF; /* turn on `off' bit */
2828                 }
2829                 else {
2830                         lp->flags |= cfg->dialmode;  /* turn on selected bits */
2831                 }
2832                 if (cfg->chargehup)
2833                         lp->hupflags |= ISDN_CHARGEHUP;
2834                 else
2835                         lp->hupflags &= ~ISDN_CHARGEHUP;
2836                 if (cfg->ihup)
2837                         lp->hupflags |= ISDN_INHUP;
2838                 else
2839                         lp->hupflags &= ~ISDN_INHUP;
2840                 if (cfg->chargeint > 10) {
2841                         lp->hupflags |= ISDN_CHARGEHUP | ISDN_HAVECHARGE | ISDN_MANCHARGE;
2842                         lp->chargeint = cfg->chargeint * HZ;
2843                 }
2844                 if (cfg->p_encap != lp->p_encap) {
2845                         if (cfg->p_encap == ISDN_NET_ENCAP_RAWIP) {
2846                                 p->dev->header_ops = NULL;
2847                                 p->dev->flags = IFF_NOARP|IFF_POINTOPOINT;
2848                         } else {
2849                                 p->dev->header_ops = &isdn_header_ops;
2850                                 if (cfg->p_encap == ISDN_NET_ENCAP_ETHER)
2851                                         p->dev->flags = IFF_BROADCAST | IFF_MULTICAST;
2852                                 else
2853                                         p->dev->flags = IFF_NOARP|IFF_POINTOPOINT;
2854                         }
2855                 }
2856                 lp->p_encap = cfg->p_encap;
2857                 return 0;
2858         }
2859         return -ENODEV;
2860 }
2861
2862 /*
2863  * Perform get-interface-parameters.ioctl
2864  */
2865 int
2866 isdn_net_getcfg(isdn_net_ioctl_cfg * cfg)
2867 {
2868         isdn_net_dev *p = isdn_net_findif(cfg->name);
2869
2870         if (p) {
2871                 isdn_net_local *lp = p->local;
2872
2873                 strcpy(cfg->eaz, lp->msn);
2874                 cfg->exclusive = lp->exclusive;
2875                 if (lp->pre_device >= 0) {
2876                         sprintf(cfg->drvid, "%s,%d", dev->drvid[lp->pre_device],
2877                                 lp->pre_channel);
2878                 } else
2879                         cfg->drvid[0] = '\0';
2880                 cfg->onhtime = lp->onhtime;
2881                 cfg->charge = lp->charge;
2882                 cfg->l2_proto = lp->l2_proto;
2883                 cfg->l3_proto = lp->l3_proto;
2884                 cfg->p_encap = lp->p_encap;
2885                 cfg->secure = (lp->flags & ISDN_NET_SECURE) ? 1 : 0;
2886                 cfg->callback = 0;
2887                 if (lp->flags & ISDN_NET_CALLBACK)
2888                         cfg->callback = 1;
2889                 if (lp->flags & ISDN_NET_CBOUT)
2890                         cfg->callback = 2;
2891                 cfg->cbhup = (lp->flags & ISDN_NET_CBHUP) ? 1 : 0;
2892                 cfg->dialmode = lp->flags & ISDN_NET_DIALMODE_MASK;
2893                 cfg->chargehup = (lp->hupflags & 4) ? 1 : 0;
2894                 cfg->ihup = (lp->hupflags & 8) ? 1 : 0;
2895                 cfg->cbdelay = lp->cbdelay;
2896                 cfg->dialmax = lp->dialmax;
2897                 cfg->triggercps = lp->triggercps;
2898                 cfg->slavedelay = lp->slavedelay / HZ;
2899                 cfg->chargeint = (lp->hupflags & ISDN_CHARGEHUP) ?
2900                     (lp->chargeint / HZ) : 0;
2901                 cfg->pppbind = lp->pppbind;
2902                 cfg->dialtimeout = lp->dialtimeout >= 0 ? lp->dialtimeout / HZ : -1;
2903                 cfg->dialwait = lp->dialwait / HZ;
2904                 if (lp->slave) {
2905                         if (strlen(lp->slave->name) > 8)
2906                                 strcpy(cfg->slave, "too-long");
2907                         else
2908                                 strcpy(cfg->slave, lp->slave->name);
2909                 } else
2910                         cfg->slave[0] = '\0';
2911                 if (lp->master) {
2912                         if (strlen(lp->master->name) > 8)
2913                                 strcpy(cfg->master, "too-long");
2914                         strcpy(cfg->master, lp->master->name);
2915                 } else
2916                         cfg->master[0] = '\0';
2917                 return 0;
2918         }
2919         return -ENODEV;
2920 }
2921
2922 /*
2923  * Add a phone-number to an interface.
2924  */
2925 int
2926 isdn_net_addphone(isdn_net_ioctl_phone * phone)
2927 {
2928         isdn_net_dev *p = isdn_net_findif(phone->name);
2929         isdn_net_phone *n;
2930
2931         if (p) {
2932                 if (!(n = kmalloc(sizeof(isdn_net_phone), GFP_KERNEL)))
2933                         return -ENOMEM;
2934                 strlcpy(n->num, phone->phone, sizeof(n->num));
2935                 n->next = p->local->phone[phone->outgoing & 1];
2936                 p->local->phone[phone->outgoing & 1] = n;
2937                 return 0;
2938         }
2939         return -ENODEV;
2940 }
2941
2942 /*
2943  * Copy a string of all phone-numbers of an interface to user space.
2944  * This might sleep and must be called with the isdn semaphore down.
2945  */
2946 int
2947 isdn_net_getphones(isdn_net_ioctl_phone * phone, char __user *phones)
2948 {
2949         isdn_net_dev *p = isdn_net_findif(phone->name);
2950         int inout = phone->outgoing & 1;
2951         int more = 0;
2952         int count = 0;
2953         isdn_net_phone *n;
2954
2955         if (!p)
2956                 return -ENODEV;
2957         inout &= 1;
2958         for (n = p->local->phone[inout]; n; n = n->next) {
2959                 if (more) {
2960                         put_user(' ', phones++);
2961                         count++;
2962                 }
2963                 if (copy_to_user(phones, n->num, strlen(n->num) + 1)) {
2964                         return -EFAULT;
2965                 }
2966                 phones += strlen(n->num);
2967                 count += strlen(n->num);
2968                 more = 1;
2969         }
2970         put_user(0, phones);
2971         count++;
2972         return count;
2973 }
2974
2975 /*
2976  * Copy a string containing the peer's phone number of a connected interface
2977  * to user space.
2978  */
2979 int
2980 isdn_net_getpeer(isdn_net_ioctl_phone *phone, isdn_net_ioctl_phone __user *peer)
2981 {
2982         isdn_net_dev *p = isdn_net_findif(phone->name);
2983         int ch, dv, idx;
2984
2985         if (!p)
2986                 return -ENODEV;
2987         /*
2988          * Theoretical race: while this executes, the remote number might
2989          * become invalid (hang up) or change (new connection), resulting
2990          * in (partially) wrong number copied to user. This race
2991          * currently ignored.
2992          */
2993         ch = p->local->isdn_channel;
2994         dv = p->local->isdn_device;
2995         if(ch < 0 && dv < 0)
2996                 return -ENOTCONN;
2997         idx = isdn_dc2minor(dv, ch);
2998         if (idx <0 )
2999                 return -ENODEV;
3000         /* for pre-bound channels, we need this extra check */
3001         if (strncmp(dev->num[idx], "???", 3) == 0)
3002                 return -ENOTCONN;
3003         strncpy(phone->phone, dev->num[idx], ISDN_MSNLEN);
3004         phone->outgoing = USG_OUTGOING(dev->usage[idx]);
3005         if (copy_to_user(peer, phone, sizeof(*peer)))
3006                 return -EFAULT;
3007         return 0;
3008 }
3009 /*
3010  * Delete a phone-number from an interface.
3011  */
3012 int
3013 isdn_net_delphone(isdn_net_ioctl_phone * phone)
3014 {
3015         isdn_net_dev *p = isdn_net_findif(phone->name);
3016         int inout = phone->outgoing & 1;
3017         isdn_net_phone *n;
3018         isdn_net_phone *m;
3019
3020         if (p) {
3021                 n = p->local->phone[inout];
3022                 m = NULL;
3023                 while (n) {
3024                         if (!strcmp(n->num, phone->phone)) {
3025                                 if (p->local->dial == n)
3026                                         p->local->dial = n->next;
3027                                 if (m)
3028                                         m->next = n->next;
3029                                 else
3030                                         p->local->phone[inout] = n->next;
3031                                 kfree(n);
3032                                 return 0;
3033                         }
3034                         m = n;
3035                         n = (isdn_net_phone *) n->next;
3036                 }
3037                 return -EINVAL;
3038         }
3039         return -ENODEV;
3040 }
3041
3042 /*
3043  * Delete all phone-numbers of an interface.
3044  */
3045 static int
3046 isdn_net_rmallphone(isdn_net_dev * p)
3047 {
3048         isdn_net_phone *n;
3049         isdn_net_phone *m;
3050         int i;
3051
3052         for (i = 0; i < 2; i++) {
3053                 n = p->local->phone[i];
3054                 while (n) {
3055                         m = n->next;
3056                         kfree(n);
3057                         n = m;
3058                 }
3059                 p->local->phone[i] = NULL;
3060         }
3061         p->local->dial = NULL;
3062         return 0;
3063 }
3064
3065 /*
3066  * Force a hangup of a network-interface.
3067  */
3068 int
3069 isdn_net_force_hangup(char *name)
3070 {
3071         isdn_net_dev *p = isdn_net_findif(name);
3072         struct net_device *q;
3073
3074         if (p) {
3075                 if (p->local->isdn_device < 0)
3076                         return 1;
3077                 q = p->local->slave;
3078                 /* If this interface has slaves, do a hangup for them also. */
3079                 while (q) {
3080                         isdn_net_hangup(q);
3081                         q = (((isdn_net_local *) q->priv)->slave);
3082                 }
3083                 isdn_net_hangup(p->dev);
3084                 return 0;
3085         }
3086         return -ENODEV;
3087 }
3088
3089 /*
3090  * Helper-function for isdn_net_rm: Do the real work.
3091  */
3092 static int
3093 isdn_net_realrm(isdn_net_dev * p, isdn_net_dev * q)
3094 {
3095         u_long flags;
3096
3097         if (isdn_net_device_started(p)) {
3098                 return -EBUSY;
3099         }
3100 #ifdef CONFIG_ISDN_X25
3101         if( p -> cprot && p -> cprot -> pops )
3102                 p -> cprot -> pops -> proto_del ( p -> cprot );
3103 #endif
3104         /* Free all phone-entries */
3105         isdn_net_rmallphone(p);
3106         /* If interface is bound exclusive, free channel-usage */
3107         if (p->local->exclusive != -1)
3108                 isdn_unexclusive_channel(p->local->pre_device, p->local->pre_channel);
3109         if (p->local->master) {
3110                 /* It's a slave-device, so update master's slave-pointer if necessary */
3111                 if (((isdn_net_local *) (p->local->master->priv))->slave == p->dev)
3112                         ((isdn_net_local *) (p->local->master->priv))->slave = p->local->slave;
3113         } else {
3114                 /* Unregister only if it's a master-device */
3115                 unregister_netdev(p->dev);
3116         }
3117         /* Unlink device from chain */
3118         spin_lock_irqsave(&dev->lock, flags);
3119         if (q)
3120                 q->next = p->next;
3121         else
3122                 dev->netdev = p->next;
3123         if (p->local->slave) {
3124                 /* If this interface has a slave, remove it also */
3125                 char *slavename = p->local->slave->name;
3126                 isdn_net_dev *n = dev->netdev;
3127                 q = NULL;
3128                 while (n) {
3129                         if (!strcmp(n->dev->name, slavename)) {
3130                                 spin_unlock_irqrestore(&dev->lock, flags);
3131                                 isdn_net_realrm(n, q);
3132                                 spin_lock_irqsave(&dev->lock, flags);
3133                                 break;
3134                         }
3135                         q = n;
3136                         n = (isdn_net_dev *)n->next;
3137                 }
3138         }
3139         spin_unlock_irqrestore(&dev->lock, flags);
3140         /* If no more net-devices remain, disable auto-hangup timer */
3141         if (dev->netdev == NULL)
3142                 isdn_timer_ctrl(ISDN_TIMER_NETHANGUP, 0);
3143         free_netdev(p->dev);
3144         kfree(p);
3145
3146         return 0;
3147 }
3148
3149 /*
3150  * Remove a single network-interface.
3151  */
3152 int
3153 isdn_net_rm(char *name)
3154 {
3155         u_long flags;
3156         isdn_net_dev *p;
3157         isdn_net_dev *q;
3158
3159         /* Search name in netdev-chain */
3160         spin_lock_irqsave(&dev->lock, flags);
3161         p = dev->netdev;
3162         q = NULL;
3163         while (p) {
3164                 if (!strcmp(p->dev->name, name)) {
3165                         spin_unlock_irqrestore(&dev->lock, flags);
3166                         return (isdn_net_realrm(p, q));
3167                 }
3168                 q = p;
3169                 p = (isdn_net_dev *) p->next;
3170         }
3171         spin_unlock_irqrestore(&dev->lock, flags);
3172         /* If no more net-devices remain, disable auto-hangup timer */
3173         if (dev->netdev == NULL)
3174                 isdn_timer_ctrl(ISDN_TIMER_NETHANGUP, 0);
3175         return -ENODEV;
3176 }
3177
3178 /*
3179  * Remove all network-interfaces
3180  */
3181 int
3182 isdn_net_rmall(void)
3183 {
3184         u_long flags;
3185         int ret;
3186
3187         /* Walk through netdev-chain */
3188         spin_lock_irqsave(&dev->lock, flags);
3189         while (dev->netdev) {
3190                 if (!dev->netdev->local->master) {
3191                         /* Remove master-devices only, slaves get removed with their master */
3192                         spin_unlock_irqrestore(&dev->lock, flags);
3193                         if ((ret = isdn_net_realrm(dev->netdev, NULL))) {
3194                                 return ret;
3195                         }
3196                         spin_lock_irqsave(&dev->lock, flags);
3197                 }
3198         }
3199         dev->netdev = NULL;
3200         spin_unlock_irqrestore(&dev->lock, flags);
3201         return 0;
3202 }