git.oblomov.eu Git - linux-2.6/blob - drivers/isdn/i4l/isdn_net.c

   1 /* $Id: isdn_net.c,v 1.1.2.2 2004/01/12 22:37:19 keil Exp $
   2  *
   3  * Linux ISDN subsystem, network interfaces and related functions (linklevel).
   4  *
   5  * Copyright 1994-1998  by Fritz Elfert (fritz@isdn4linux.de)
   6  * Copyright 1995,96    by Thinking Objects Software GmbH Wuerzburg
   7  * Copyright 1995,96    by Michael Hipp (Michael.Hipp@student.uni-tuebingen.de)
   8  *
   9  * This software may be used and distributed according to the terms
  10  * of the GNU General Public License, incorporated herein by reference.
  11  *
  12  * Data Over Voice (DOV) support added - Guy Ellis 23-Mar-02
  13  *                                       guy@traverse.com.au
  14  * Outgoing calls - looks for a 'V' in first char of dialed number
  15  * Incoming calls - checks first character of eaz as follows:
  16  *   Numeric - accept DATA only - original functionality
  17  *   'V'     - accept VOICE (DOV) only
  18  *   'B'     - accept BOTH DATA and DOV types
  19  *
  20  * Jan 2001: fix CISCO HDLC      Bjoern A. Zeeb <i4l@zabbadoz.net>
  21  *           for info on the protocol, see
  22  *           http://i4l.zabbadoz.net/i4l/cisco-hdlc.txt
  23  */
  24
  25 #include <linux/config.h>
  26 #include <linux/isdn.h>
  27 #include <net/arp.h>
  28 #include <net/dst.h>
  29 #include <net/pkt_sched.h>
  30 #include <linux/inetdevice.h>
  31 #include "isdn_common.h"
  32 #include "isdn_net.h"
  33 #ifdef CONFIG_ISDN_PPP
  34 #include "isdn_ppp.h"
  35 #endif
  36 #ifdef CONFIG_ISDN_X25
  37 #include <linux/concap.h>
  38 #include "isdn_concap.h"
  39 #endif
  40
  41
  42 /*
  43  * Outline of new tbusy handling:
  44  *
  45  * Old method, roughly spoken, consisted of setting tbusy when entering
  46  * isdn_net_start_xmit() and at several other locations and clearing
  47  * it from isdn_net_start_xmit() thread when sending was successful.
  48  *
  49  * With 2.3.x multithreaded network core, to prevent problems, tbusy should
  50  * only be set by the isdn_net_start_xmit() thread and only when a tx-busy
  51  * condition is detected. Other threads (in particular isdn_net_stat_callb())
  52  * are only allowed to clear tbusy.
  53  *
  54  * -HE
  55  */
  56
  57 /*
  58  * About SOFTNET:
  59  * Most of the changes were pretty obvious and basically done by HE already.
  60  *
  61  * One problem of the isdn net device code is that is uses struct net_device
  62  * for masters and slaves. However, only master interface are registered to
  63  * the network layer, and therefore, it only makes sense to call netif_*
  64  * functions on them.
  65  *
  66  * --KG
  67  */
  68
  69 /*
  70  * Find out if the netdevice has been ifup-ed yet.
  71  * For slaves, look at the corresponding master.
  72  */
  73 static __inline__ int isdn_net_device_started(isdn_net_dev *n)
  74 {
  75         isdn_net_local *lp = n->local;
  76         struct net_device *dev;
  77
  78         if (lp->master)
  79                 dev = lp->master;
  80         else
  81                 dev = &n->dev;
  82         return netif_running(dev);
  83 }
  84
  85 /*
  86  * wake up the network -> net_device queue.
  87  * For slaves, wake the corresponding master interface.
  88  */
  89 static __inline__ void isdn_net_device_wake_queue(isdn_net_local *lp)
  90 {
  91         if (lp->master)
  92                 netif_wake_queue(lp->master);
  93         else
  94                 netif_wake_queue(&lp->netdev->dev);
  95 }
  96
  97 /*
  98  * stop the network -> net_device queue.
  99  * For slaves, stop the corresponding master interface.
 100  */
 101 static __inline__ void isdn_net_device_stop_queue(isdn_net_local *lp)
 102 {
 103         if (lp->master)
 104                 netif_stop_queue(lp->master);
 105         else
 106                 netif_stop_queue(&lp->netdev->dev);
 107 }
 108
 109 /*
 110  * find out if the net_device which this lp belongs to (lp can be
 111  * master or slave) is busy. It's busy iff all (master and slave)
 112  * queues are busy
 113  */
 114 static __inline__ int isdn_net_device_busy(isdn_net_local *lp)
 115 {
 116         isdn_net_local *nlp;
 117         isdn_net_dev *nd;
 118         unsigned long flags;
 119
 120         if (!isdn_net_lp_busy(lp))
 121                 return 0;
 122
 123         if (lp->master)
 124                 nd = ((isdn_net_local *) lp->master->priv)->netdev;
 125         else
 126                 nd = lp->netdev;
 127
 128         spin_lock_irqsave(&nd->queue_lock, flags);
 129         nlp = lp->next;
 130         while (nlp != lp) {
 131                 if (!isdn_net_lp_busy(nlp)) {
 132                         spin_unlock_irqrestore(&nd->queue_lock, flags);
 133                         return 0;
 134                 }
 135                 nlp = nlp->next;
 136         }
 137         spin_unlock_irqrestore(&nd->queue_lock, flags);
 138         return 1;
 139 }
 140
 141 static __inline__ void isdn_net_inc_frame_cnt(isdn_net_local *lp)
 142 {
 143         atomic_inc(&lp->frame_cnt);
 144         if (isdn_net_device_busy(lp))
 145                 isdn_net_device_stop_queue(lp);
 146 }
 147
 148 static __inline__ void isdn_net_dec_frame_cnt(isdn_net_local *lp)
 149 {
 150         atomic_dec(&lp->frame_cnt);
 151
 152         if (!(isdn_net_device_busy(lp))) {
 153                 if (!skb_queue_empty(&lp->super_tx_queue)) {
 154                         schedule_work(&lp->tqueue);
 155                 } else {
 156                         isdn_net_device_wake_queue(lp);
 157                 }
 158        }
 159 }
 160
 161 static __inline__ void isdn_net_zero_frame_cnt(isdn_net_local *lp)
 162 {
 163         atomic_set(&lp->frame_cnt, 0);
 164 }
 165
 166 /* For 2.2.x we leave the transmitter busy timeout at 2 secs, just
 167  * to be safe.
 168  * For 2.3.x we push it up to 20 secs, because call establishment
 169  * (in particular callback) may take such a long time, and we
 170  * don't want confusing messages in the log. However, there is a slight
 171  * possibility that this large timeout will break other things like MPPP,
 172  * which might rely on the tx timeout. If so, we'll find out this way...
 173  */
 174
 175 #define ISDN_NET_TX_TIMEOUT (20*HZ)
 176
 177 /* Prototypes */
 178
 179 static int isdn_net_force_dial_lp(isdn_net_local *);
 180 static int isdn_net_start_xmit(struct sk_buff *, struct net_device *);
 181
 182 static void isdn_net_ciscohdlck_connected(isdn_net_local *lp);
 183 static void isdn_net_ciscohdlck_disconnected(isdn_net_local *lp);
 184
 185 char *isdn_net_revision = "$Revision: 1.1.2.2 $";
 186
 187  /*
 188   * Code for raw-networking over ISDN
 189   */
 190
 191 static void
 192 isdn_net_unreachable(struct net_device *dev, struct sk_buff *skb, char *reason)
 193 {
 194         if(skb) {
 195
 196                 u_short proto = ntohs(skb->protocol);
 197
 198                 printk(KERN_DEBUG "isdn_net: %s: %s, signalling dst_link_failure %s\n",
 199                        dev->name,
 200                        (reason != NULL) ? reason : "unknown",
 201                        (proto != ETH_P_IP) ? "Protocol != ETH_P_IP" : "");
 202
 203                 dst_link_failure(skb);
 204         }
 205         else {  /* dial not triggered by rawIP packet */
 206                 printk(KERN_DEBUG "isdn_net: %s: %s\n",
 207                            dev->name,
 208                            (reason != NULL) ? reason : "reason unknown");
 209         }
 210 }
 211
 212 static void
 213 isdn_net_reset(struct net_device *dev)
 214 {
 215 #ifdef CONFIG_ISDN_X25
 216         struct concap_device_ops * dops =
 217                 ( (isdn_net_local *) dev->priv ) -> dops;
 218         struct concap_proto * cprot =
 219                 ( (isdn_net_local *) dev->priv ) -> netdev -> cprot;
 220 #endif
 221 #ifdef CONFIG_ISDN_X25
 222         if( cprot && cprot -> pops && dops )
 223                 cprot -> pops -> restart ( cprot, dev, dops );
 224 #endif
 225 }
 226
 227 /* Open/initialize the board. */
 228 static int
 229 isdn_net_open(struct net_device *dev)
 230 {
 231         int i;
 232         struct net_device *p;
 233         struct in_device *in_dev;
 234
 235         /* moved here from isdn_net_reset, because only the master has an
 236            interface associated which is supposed to be started. BTW:
 237            we need to call netif_start_queue, not netif_wake_queue here */
 238         netif_start_queue(dev);
 239
 240         isdn_net_reset(dev);
 241         /* Fill in the MAC-level header (not needed, but for compatibility... */
 242         for (i = 0; i < ETH_ALEN - sizeof(u32); i++)
 243                 dev->dev_addr[i] = 0xfc;
 244         if ((in_dev = dev->ip_ptr) != NULL) {
 245                 /*
 246                  *      Any address will do - we take the first
 247                  */
 248                 struct in_ifaddr *ifa = in_dev->ifa_list;
 249                 if (ifa != NULL)
 250                         memcpy(dev->dev_addr+2, &ifa->ifa_local, 4);
 251         }
 252
 253         /* If this interface has slaves, start them also */
 254
 255         if ((p = (((isdn_net_local *) dev->priv)->slave))) {
 256                 while (p) {
 257                         isdn_net_reset(p);
 258                         p = (((isdn_net_local *) p->priv)->slave);
 259                 }
 260         }
 261         isdn_lock_drivers();
 262         return 0;
 263 }
 264
 265 /*
 266  * Assign an ISDN-channel to a net-interface
 267  */
 268 static void
 269 isdn_net_bind_channel(isdn_net_local * lp, int idx)
 270 {
 271         lp->flags |= ISDN_NET_CONNECTED;
 272         lp->isdn_device = dev->drvmap[idx];
 273         lp->isdn_channel = dev->chanmap[idx];
 274         dev->rx_netdev[idx] = lp->netdev;
 275         dev->st_netdev[idx] = lp->netdev;
 276 }
 277
 278 /*
 279  * unbind a net-interface (resets interface after an error)
 280  */
 281 static void
 282 isdn_net_unbind_channel(isdn_net_local * lp)
 283 {
 284         skb_queue_purge(&lp->super_tx_queue);
 285
 286         if (!lp->master) {      /* reset only master device */
 287                 /* Moral equivalent of dev_purge_queues():
 288                    BEWARE! This chunk of code cannot be called from hardware
 289                    interrupt handler. I hope it is true. --ANK
 290                  */
 291                 qdisc_reset(lp->netdev->dev.qdisc);
 292         }
 293         lp->dialstate = 0;
 294         dev->rx_netdev[isdn_dc2minor(lp->isdn_device, lp->isdn_channel)] = NULL;
 295         dev->st_netdev[isdn_dc2minor(lp->isdn_device, lp->isdn_channel)] = NULL;
 296         isdn_free_channel(lp->isdn_device, lp->isdn_channel, ISDN_USAGE_NET);
 297         lp->flags &= ~ISDN_NET_CONNECTED;
 298         lp->isdn_device = -1;
 299         lp->isdn_channel = -1;
 300 }
 301
 302 /*
 303  * Perform auto-hangup and cps-calculation for net-interfaces.
 304  *
 305  * auto-hangup:
 306  * Increment idle-counter (this counter is reset on any incoming or
 307  * outgoing packet), if counter exceeds configured limit either do a
 308  * hangup immediately or - if configured - wait until just before the next
 309  * charge-info.
 310  *
 311  * cps-calculation (needed for dynamic channel-bundling):
 312  * Since this function is called every second, simply reset the
 313  * byte-counter of the interface after copying it to the cps-variable.
 314  */
 315 static unsigned long last_jiffies = -HZ;
 316
 317 void
 318 isdn_net_autohup(void)
 319 {
 320         isdn_net_dev *p = dev->netdev;
 321         int anymore;
 322
 323         anymore = 0;
 324         while (p) {
 325                 isdn_net_local *l = p->local;
 326                 if (jiffies == last_jiffies)
 327                         l->cps = l->transcount;
 328                 else
 329                         l->cps = (l->transcount * HZ) / (jiffies - last_jiffies);
 330                 l->transcount = 0;
 331                 if (dev->net_verbose > 3)
 332                         printk(KERN_DEBUG "%s: %d bogocps\n", l->name, l->cps);
 333                 if ((l->flags & ISDN_NET_CONNECTED) && (!l->dialstate)) {
 334                         anymore = 1;
 335                         l->huptimer++;
 336                         /*
 337                          * if there is some dialmode where timeout-hangup
 338                          * should _not_ be done, check for that here
 339                          */
 340                         if ((l->onhtime) &&
 341                             (l->huptimer > l->onhtime))
 342                         {
 343                                 if (l->hupflags & ISDN_MANCHARGE &&
 344                                     l->hupflags & ISDN_CHARGEHUP) {
 345                                         while (time_after(jiffies, l->chargetime + l->chargeint))
 346                                                 l->chargetime += l->chargeint;
 347                                         if (time_after(jiffies, l->chargetime + l->chargeint - 2 * HZ))
 348                                                 if (l->outgoing || l->hupflags & ISDN_INHUP)
 349                                                         isdn_net_hangup(&p->dev);
 350                                 } else if (l->outgoing) {
 351                                         if (l->hupflags & ISDN_CHARGEHUP) {
 352                                                 if (l->hupflags & ISDN_WAITCHARGE) {
 353                                                         printk(KERN_DEBUG "isdn_net: Hupflags of %s are %X\n",
 354                                                                l->name, l->hupflags);
 355                                                         isdn_net_hangup(&p->dev);
 356                                                 } else if (time_after(jiffies, l->chargetime + l->chargeint)) {
 357                                                         printk(KERN_DEBUG
 358                                                                "isdn_net: %s: chtime = %lu, chint = %d\n",
 359                                                                l->name, l->chargetime, l->chargeint);
 360                                                         isdn_net_hangup(&p->dev);
 361                                                 }
 362                                         } else
 363                                                 isdn_net_hangup(&p->dev);
 364                                 } else if (l->hupflags & ISDN_INHUP)
 365                                         isdn_net_hangup(&p->dev);
 366                         }
 367
 368                         if(dev->global_flags & ISDN_GLOBAL_STOPPED || (ISDN_NET_DIALMODE(*l) == ISDN_NET_DM_OFF)) {
 369                                 isdn_net_hangup(&p->dev);
 370                                 break;
 371                         }
 372                 }
 373                 p = (isdn_net_dev *) p->next;
 374         }
 375         last_jiffies = jiffies;
 376         isdn_timer_ctrl(ISDN_TIMER_NETHANGUP, anymore);
 377 }
 378
 379 static void isdn_net_lp_disconnected(isdn_net_local *lp)
 380 {
 381         isdn_net_rm_from_bundle(lp);
 382 }
 383
 384 /*
 385  * Handle status-messages from ISDN-interfacecard.
 386  * This function is called from within the main-status-dispatcher
 387  * isdn_status_callback, which itself is called from the low-level driver.
 388  * Return: 1 = Event handled, 0 = not for us or unknown Event.
 389  */
 390 int
 391 isdn_net_stat_callback(int idx, isdn_ctrl *c)
 392 {
 393         isdn_net_dev *p = dev->st_netdev[idx];
 394         int cmd = c->command;
 395
 396         if (p) {
 397                 isdn_net_local *lp = p->local;
 398 #ifdef CONFIG_ISDN_X25
 399                 struct concap_proto *cprot = lp->netdev->cprot;
 400                 struct concap_proto_ops *pops = cprot ? cprot->pops : NULL;
 401 #endif
 402                 switch (cmd) {
 403                         case ISDN_STAT_BSENT:
 404                                 /* A packet has successfully been sent out */
 405                                 if ((lp->flags & ISDN_NET_CONNECTED) &&
 406                                     (!lp->dialstate)) {
 407                                         isdn_net_dec_frame_cnt(lp);
 408                                         lp->stats.tx_packets++;
 409                                         lp->stats.tx_bytes += c->parm.length;
 410                                 }
 411                                 return 1;
 412                         case ISDN_STAT_DCONN:
 413                                 /* D-Channel is up */
 414                                 switch (lp->dialstate) {
 415                                         case 4:
 416                                         case 7:
 417                                         case 8:
 418                                                 lp->dialstate++;
 419                                                 return 1;
 420                                         case 12:
 421                                                 lp->dialstate = 5;
 422                                                 return 1;
 423                                 }
 424                                 break;
 425                         case ISDN_STAT_DHUP:
 426                                 /* Either D-Channel-hangup or error during dialout */
 427 #ifdef CONFIG_ISDN_X25
 428                                 /* If we are not connencted then dialing had
 429                                    failed. If there are generic encap protocol
 430                                    receiver routines signal the closure of
 431                                    the link*/
 432
 433                                 if( !(lp->flags & ISDN_NET_CONNECTED)
 434                                     && pops && pops -> disconn_ind )
 435                                         pops -> disconn_ind(cprot);
 436 #endif /* CONFIG_ISDN_X25 */
 437                                 if ((!lp->dialstate) && (lp->flags & ISDN_NET_CONNECTED)) {
 438                                         if (lp->p_encap == ISDN_NET_ENCAP_CISCOHDLCK)
 439                                                 isdn_net_ciscohdlck_disconnected(lp);
 440 #ifdef CONFIG_ISDN_PPP
 441                                         if (lp->p_encap == ISDN_NET_ENCAP_SYNCPPP)
 442                                                 isdn_ppp_free(lp);
 443 #endif
 444                                         isdn_net_lp_disconnected(lp);
 445                                         isdn_all_eaz(lp->isdn_device, lp->isdn_channel);
 446                                         printk(KERN_INFO "%s: remote hangup\n", lp->name);
 447                                         printk(KERN_INFO "%s: Chargesum is %d\n", lp->name,
 448                                                lp->charge);
 449                                         isdn_net_unbind_channel(lp);
 450                                         return 1;
 451                                 }
 452                                 break;
 453 #ifdef CONFIG_ISDN_X25
 454                         case ISDN_STAT_BHUP:
 455                                 /* B-Channel-hangup */
 456                                 /* try if there are generic encap protocol
 457                                    receiver routines and signal the closure of
 458                                    the link */
 459                                 if( pops  &&  pops -> disconn_ind ){
 460                                                 pops -> disconn_ind(cprot);
 461                                                 return 1;
 462                                         }
 463                                 break;
 464 #endif /* CONFIG_ISDN_X25 */
 465                         case ISDN_STAT_BCONN:
 466                                 /* B-Channel is up */
 467                                 isdn_net_zero_frame_cnt(lp);
 468                                 switch (lp->dialstate) {
 469                                         case 5:
 470                                         case 6:
 471                                         case 7:
 472                                         case 8:
 473                                         case 9:
 474                                         case 10:
 475                                         case 12:
 476                                                 if (lp->dialstate <= 6) {
 477                                                         dev->usage[idx] |= ISDN_USAGE_OUTGOING;
 478                                                         isdn_info_update();
 479                                                 } else
 480                                                         dev->rx_netdev[idx] = p;
 481                                                 lp->dialstate = 0;
 482                                                 isdn_timer_ctrl(ISDN_TIMER_NETHANGUP, 1);
 483                                                 if (lp->p_encap == ISDN_NET_ENCAP_CISCOHDLCK)
 484                                                         isdn_net_ciscohdlck_connected(lp);
 485                                                 if (lp->p_encap != ISDN_NET_ENCAP_SYNCPPP) {
 486                                                         if (lp->master) { /* is lp a slave? */
 487                                                                 isdn_net_dev *nd = ((isdn_net_local *)lp->master->priv)->netdev;
 488                                                                 isdn_net_add_to_bundle(nd, lp);
 489                                                         }
 490                                                 }
 491                                                 printk(KERN_INFO "isdn_net: %s connected\n", lp->name);
 492                                                 /* If first Chargeinfo comes before B-Channel connect,
 493                                                  * we correct the timestamp here.
 494                                                  */
 495                                                 lp->chargetime = jiffies;
 496
 497                                                 /* reset dial-timeout */
 498                                                 lp->dialstarted = 0;
 499                                                 lp->dialwait_timer = 0;
 500
 501 #ifdef CONFIG_ISDN_PPP
 502                                                 if (lp->p_encap == ISDN_NET_ENCAP_SYNCPPP)
 503                                                         isdn_ppp_wakeup_daemon(lp);
 504 #endif
 505 #ifdef CONFIG_ISDN_X25
 506                                                 /* try if there are generic concap receiver routines */
 507                                                 if( pops )
 508                                                         if( pops->connect_ind)
 509                                                                 pops->connect_ind(cprot);
 510 #endif /* CONFIG_ISDN_X25 */
 511                                                 /* ppp needs to do negotiations first */
 512                                                 if (lp->p_encap != ISDN_NET_ENCAP_SYNCPPP)
 513                                                         isdn_net_device_wake_queue(lp);
 514                                                 return 1;
 515                                 }
 516                                 break;
 517                         case ISDN_STAT_NODCH:
 518                                 /* No D-Channel avail. */
 519                                 if (lp->dialstate == 4) {
 520                                         lp->dialstate--;
 521                                         return 1;
 522                                 }
 523                                 break;
 524                         case ISDN_STAT_CINF:
 525                                 /* Charge-info from TelCo. Calculate interval between
 526                                  * charge-infos and set timestamp for last info for
 527                                  * usage by isdn_net_autohup()
 528                                  */
 529                                 lp->charge++;
 530                                 if (lp->hupflags & ISDN_HAVECHARGE) {
 531                                         lp->hupflags &= ~ISDN_WAITCHARGE;
 532                                         lp->chargeint = jiffies - lp->chargetime - (2 * HZ);
 533                                 }
 534                                 if (lp->hupflags & ISDN_WAITCHARGE)
 535                                         lp->hupflags |= ISDN_HAVECHARGE;
 536                                 lp->chargetime = jiffies;
 537                                 printk(KERN_DEBUG "isdn_net: Got CINF chargetime of %s now %lu\n",
 538                                        lp->name, lp->chargetime);
 539                                 return 1;
 540                 }
 541         }
 542         return 0;
 543 }
 544
 545 /*
 546  * Perform dialout for net-interfaces and timeout-handling for
 547  * D-Channel-up and B-Channel-up Messages.
 548  * This function is initially called from within isdn_net_start_xmit() or
 549  * or isdn_net_find_icall() after initializing the dialstate for an
 550  * interface. If further calls are needed, the function schedules itself
 551  * for a timer-callback via isdn_timer_function().
 552  * The dialstate is also affected by incoming status-messages from
 553  * the ISDN-Channel which are handled in isdn_net_stat_callback() above.
 554  */
 555 void
 556 isdn_net_dial(void)
 557 {
 558         isdn_net_dev *p = dev->netdev;
 559         int anymore = 0;
 560         int i;
 561         isdn_ctrl cmd;
 562         u_char *phone_number;
 563
 564         while (p) {
 565                 isdn_net_local *lp = p->local;
 566
 567 #ifdef ISDN_DEBUG_NET_DIAL
 568                 if (lp->dialstate)
 569                         printk(KERN_DEBUG "%s: dialstate=%d\n", lp->name, lp->dialstate);
 570 #endif
 571                 switch (lp->dialstate) {
 572                         case 0:
 573                                 /* Nothing to do for this interface */
 574                                 break;
 575                         case 1:
 576                                 /* Initiate dialout. Set phone-number-pointer to first number
 577                                  * of interface.
 578                                  */
 579                                 lp->dial = lp->phone[1];
 580                                 if (!lp->dial) {
 581                                         printk(KERN_WARNING "%s: phone number deleted?\n",
 582                                                lp->name);
 583                                         isdn_net_hangup(&p->dev);
 584                                         break;
 585                                 }
 586                                 anymore = 1;
 587
 588                                 if(lp->dialtimeout > 0)
 589                                         if(lp->dialstarted == 0 || time_after(jiffies, lp->dialstarted + lp->dialtimeout + lp->dialwait)) {
 590                                                 lp->dialstarted = jiffies;
 591                                                 lp->dialwait_timer = 0;
 592                                         }
 593
 594                                 lp->dialstate++;
 595                                 /* Fall through */
 596                         case 2:
 597                                 /* Prepare dialing. Clear EAZ, then set EAZ. */
 598                                 cmd.driver = lp->isdn_device;
 599                                 cmd.arg = lp->isdn_channel;
 600                                 cmd.command = ISDN_CMD_CLREAZ;
 601                                 isdn_command(&cmd);
 602                                 sprintf(cmd.parm.num, "%s", isdn_map_eaz2msn(lp->msn, cmd.driver));
 603                                 cmd.command = ISDN_CMD_SETEAZ;
 604                                 isdn_command(&cmd);
 605                                 lp->dialretry = 0;
 606                                 anymore = 1;
 607                                 lp->dialstate++;
 608                                 /* Fall through */
 609                         case 3:
 610                                 /* Setup interface, dial current phone-number, switch to next number.
 611                                  * If list of phone-numbers is exhausted, increment
 612                                  * retry-counter.
 613                                  */
 614                                 if(dev->global_flags & ISDN_GLOBAL_STOPPED || (ISDN_NET_DIALMODE(*lp) == ISDN_NET_DM_OFF)) {
 615                                         char *s;
 616                                         if (dev->global_flags & ISDN_GLOBAL_STOPPED)
 617                                                 s = "dial suppressed: isdn system stopped";
 618                                         else
 619                                                 s = "dial suppressed: dialmode `off'";
 620                                         isdn_net_unreachable(&p->dev, NULL, s);
 621                                         isdn_net_hangup(&p->dev);
 622                                         break;
 623                                 }
 624                                 cmd.driver = lp->isdn_device;
 625                                 cmd.command = ISDN_CMD_SETL2;
 626                                 cmd.arg = lp->isdn_channel + (lp->l2_proto << 8);
 627                                 isdn_command(&cmd);
 628                                 cmd.driver = lp->isdn_device;
 629                                 cmd.command = ISDN_CMD_SETL3;
 630                                 cmd.arg = lp->isdn_channel + (lp->l3_proto << 8);
 631                                 isdn_command(&cmd);
 632                                 cmd.driver = lp->isdn_device;
 633                                 cmd.arg = lp->isdn_channel;
 634                                 if (!lp->dial) {
 635                                         printk(KERN_WARNING "%s: phone number deleted?\n",
 636                                                lp->name);
 637                                         isdn_net_hangup(&p->dev);
 638                                         break;
 639                                 }
 640                                 if (!strncmp(lp->dial->num, "LEASED", strlen("LEASED"))) {
 641                                         lp->dialstate = 4;
 642                                         printk(KERN_INFO "%s: Open leased line ...\n", lp->name);
 643                                 } else {
 644                                         if(lp->dialtimeout > 0)
 645                                                 if (time_after(jiffies, lp->dialstarted + lp->dialtimeout)) {
 646                                                         lp->dialwait_timer = jiffies + lp->dialwait;
 647                                                         lp->dialstarted = 0;
 648                                                         isdn_net_unreachable(&p->dev, NULL, "dial: timed out");
 649                                                         isdn_net_hangup(&p->dev);
 650                                                         break;
 651                                                 }
 652
 653                                         cmd.driver = lp->isdn_device;
 654                                         cmd.command = ISDN_CMD_DIAL;
 655                                         cmd.parm.setup.si2 = 0;
 656
 657                                         /* check for DOV */
 658                                         phone_number = lp->dial->num;
 659                                         if ((*phone_number == 'v') ||
 660                                             (*phone_number == 'V')) { /* DOV call */
 661                                                 cmd.parm.setup.si1 = 1;
 662                                         } else { /* DATA call */
 663                                                 cmd.parm.setup.si1 = 7;
 664                                         }
 665
 666                                         strcpy(cmd.parm.setup.phone, phone_number);
 667                                         /*
 668                                          * Switch to next number or back to start if at end of list.
 669                                          */
 670                                         if (!(lp->dial = (isdn_net_phone *) lp->dial->next)) {
 671                                                 lp->dial = lp->phone[1];
 672                                                 lp->dialretry++;
 673
 674                                                 if (lp->dialretry > lp->dialmax) {
 675                                                         if (lp->dialtimeout == 0) {
 676                                                                 lp->dialwait_timer = jiffies + lp->dialwait;
 677                                                                 lp->dialstarted = 0;
 678                                                                 isdn_net_unreachable(&p->dev, NULL, "dial: tried all numbers dialmax times");
 679                                                         }
 680                                                         isdn_net_hangup(&p->dev);
 681                                                         break;
 682                                                 }
 683                                         }
 684                                         sprintf(cmd.parm.setup.eazmsn, "%s",
 685                                                 isdn_map_eaz2msn(lp->msn, cmd.driver));
 686                                         i = isdn_dc2minor(lp->isdn_device, lp->isdn_channel);
 687                                         if (i >= 0) {
 688                                                 strcpy(dev->num[i], cmd.parm.setup.phone);
 689                                                 dev->usage[i] |= ISDN_USAGE_OUTGOING;
 690                                                 isdn_info_update();
 691                                         }
 692                                         printk(KERN_INFO "%s: dialing %d %s... %s\n", lp->name,
 693                                                lp->dialretry, cmd.parm.setup.phone,
 694                                                (cmd.parm.setup.si1 == 1) ? "DOV" : "");
 695                                         lp->dtimer = 0;
 696 #ifdef ISDN_DEBUG_NET_DIAL
 697                                         printk(KERN_DEBUG "dial: d=%d c=%d\n", lp->isdn_device,
 698                                                lp->isdn_channel);
 699 #endif
 700                                         isdn_command(&cmd);
 701                                 }
 702                                 lp->huptimer = 0;
 703                                 lp->outgoing = 1;
 704                                 if (lp->chargeint) {
 705                                         lp->hupflags |= ISDN_HAVECHARGE;
 706                                         lp->hupflags &= ~ISDN_WAITCHARGE;
 707                                 } else {
 708                                         lp->hupflags |= ISDN_WAITCHARGE;
 709                                         lp->hupflags &= ~ISDN_HAVECHARGE;
 710                                 }
 711                                 anymore = 1;
 712                                 lp->dialstate =
 713                                     (lp->cbdelay &&
 714                                      (lp->flags & ISDN_NET_CBOUT)) ? 12 : 4;
 715                                 break;
 716                         case 4:
 717                                 /* Wait for D-Channel-connect.
 718                                  * If timeout, switch back to state 3.
 719                                  * Dialmax-handling moved to state 3.
 720                                  */
 721                                 if (lp->dtimer++ > ISDN_TIMER_DTIMEOUT10)
 722                                         lp->dialstate = 3;
 723                                 anymore = 1;
 724                                 break;
 725                         case 5:
 726                                 /* Got D-Channel-Connect, send B-Channel-request */
 727                                 cmd.driver = lp->isdn_device;
 728                                 cmd.arg = lp->isdn_channel;
 729                                 cmd.command = ISDN_CMD_ACCEPTB;
 730                                 anymore = 1;
 731                                 lp->dtimer = 0;
 732                                 lp->dialstate++;
 733                                 isdn_command(&cmd);
 734                                 break;
 735                         case 6:
 736                                 /* Wait for B- or D-Channel-connect. If timeout,
 737                                  * switch back to state 3.
 738                                  */
 739 #ifdef ISDN_DEBUG_NET_DIAL
 740                                 printk(KERN_DEBUG "dialtimer2: %d\n", lp->dtimer);
 741 #endif
 742                                 if (lp->dtimer++ > ISDN_TIMER_DTIMEOUT10)
 743                                         lp->dialstate = 3;
 744                                 anymore = 1;
 745                                 break;
 746                         case 7:
 747                                 /* Got incoming Call, setup L2 and L3 protocols,
 748                                  * then wait for D-Channel-connect
 749                                  */
 750 #ifdef ISDN_DEBUG_NET_DIAL
 751                                 printk(KERN_DEBUG "dialtimer4: %d\n", lp->dtimer);
 752 #endif
 753                                 cmd.driver = lp->isdn_device;
 754                                 cmd.command = ISDN_CMD_SETL2;
 755                                 cmd.arg = lp->isdn_channel + (lp->l2_proto << 8);
 756                                 isdn_command(&cmd);
 757                                 cmd.driver = lp->isdn_device;
 758                                 cmd.command = ISDN_CMD_SETL3;
 759                                 cmd.arg = lp->isdn_channel + (lp->l3_proto << 8);
 760                                 isdn_command(&cmd);
 761                                 if (lp->dtimer++ > ISDN_TIMER_DTIMEOUT15)
 762                                         isdn_net_hangup(&p->dev);
 763                                 else {
 764                                         anymore = 1;
 765                                         lp->dialstate++;
 766                                 }
 767                                 break;
 768                         case 9:
 769                                 /* Got incoming D-Channel-Connect, send B-Channel-request */
 770                                 cmd.driver = lp->isdn_device;
 771                                 cmd.arg = lp->isdn_channel;
 772                                 cmd.command = ISDN_CMD_ACCEPTB;
 773                                 isdn_command(&cmd);
 774                                 anymore = 1;
 775                                 lp->dtimer = 0;
 776                                 lp->dialstate++;
 777                                 break;
 778                         case 8:
 779                         case 10:
 780                                 /*  Wait for B- or D-channel-connect */
 781 #ifdef ISDN_DEBUG_NET_DIAL
 782                                 printk(KERN_DEBUG "dialtimer4: %d\n", lp->dtimer);
 783 #endif
 784                                 if (lp->dtimer++ > ISDN_TIMER_DTIMEOUT10)
 785                                         isdn_net_hangup(&p->dev);
 786                                 else
 787                                         anymore = 1;
 788                                 break;
 789                         case 11:
 790                                 /* Callback Delay */
 791                                 if (lp->dtimer++ > lp->cbdelay)
 792                                         lp->dialstate = 1;
 793                                 anymore = 1;
 794                                 break;
 795                         case 12:
 796                                 /* Remote does callback. Hangup after cbdelay, then wait for incoming
 797                                  * call (in state 4).
 798                                  */
 799                                 if (lp->dtimer++ > lp->cbdelay)
 800                                 {
 801                                         printk(KERN_INFO "%s: hangup waiting for callback ...\n", lp->name);
 802                                         lp->dtimer = 0;
 803                                         lp->dialstate = 4;
 804                                         cmd.driver = lp->isdn_device;
 805                                         cmd.command = ISDN_CMD_HANGUP;
 806                                         cmd.arg = lp->isdn_channel;
 807                                         isdn_command(&cmd);
 808                                         isdn_all_eaz(lp->isdn_device, lp->isdn_channel);
 809                                 }
 810                                 anymore = 1;
 811                                 break;
 812                         default:
 813                                 printk(KERN_WARNING "isdn_net: Illegal dialstate %d for device %s\n",
 814                                        lp->dialstate, lp->name);
 815                 }
 816                 p = (isdn_net_dev *) p->next;
 817         }
 818         isdn_timer_ctrl(ISDN_TIMER_NETDIAL, anymore);
 819 }
 820
 821 /*
 822  * Perform hangup for a net-interface.
 823  */
 824 void
 825 isdn_net_hangup(struct net_device *d)
 826 {
 827         isdn_net_local *lp = (isdn_net_local *) d->priv;
 828         isdn_ctrl cmd;
 829 #ifdef CONFIG_ISDN_X25
 830         struct concap_proto *cprot = lp->netdev->cprot;
 831         struct concap_proto_ops *pops = cprot ? cprot->pops : NULL;
 832 #endif
 833
 834         if (lp->flags & ISDN_NET_CONNECTED) {
 835                 if (lp->slave != NULL) {
 836                         isdn_net_local *slp = (isdn_net_local *)lp->slave->priv;
 837                         if (slp->flags & ISDN_NET_CONNECTED) {
 838                                 printk(KERN_INFO
 839                                         "isdn_net: hang up slave %s before %s\n",
 840                                         slp->name, lp->name);
 841                                 isdn_net_hangup(lp->slave);
 842                         }
 843                 }
 844                 printk(KERN_INFO "isdn_net: local hangup %s\n", lp->name);
 845 #ifdef CONFIG_ISDN_PPP
 846                 if (lp->p_encap == ISDN_NET_ENCAP_SYNCPPP)
 847                         isdn_ppp_free(lp);
 848 #endif
 849                 isdn_net_lp_disconnected(lp);
 850 #ifdef CONFIG_ISDN_X25
 851                 /* try if there are generic encap protocol
 852                    receiver routines and signal the closure of
 853                    the link */
 854                 if( pops && pops -> disconn_ind )
 855                   pops -> disconn_ind(cprot);
 856 #endif /* CONFIG_ISDN_X25 */
 857
 858                 cmd.driver = lp->isdn_device;
 859                 cmd.command = ISDN_CMD_HANGUP;
 860                 cmd.arg = lp->isdn_channel;
 861                 isdn_command(&cmd);
 862                 printk(KERN_INFO "%s: Chargesum is %d\n", lp->name, lp->charge);
 863                 isdn_all_eaz(lp->isdn_device, lp->isdn_channel);
 864         }
 865         isdn_net_unbind_channel(lp);
 866 }
 867
 868 typedef struct {
 869         unsigned short source;
 870         unsigned short dest;
 871 } ip_ports;
 872
 873 static void
 874 isdn_net_log_skb(struct sk_buff * skb, isdn_net_local * lp)
 875 {
 876         u_char *p = skb->nh.raw; /* hopefully, this was set correctly */
 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 (skb->nh.raw < skb->data || skb->nh.raw >= 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->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(void *private)
 989 {
 990         isdn_net_local *lp = private;
 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->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                 int pullsize = (ulong)skb->nh.raw - (ulong)skb->data - 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->mac.raw = skb->data;
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                                         lp->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->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->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->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         u32 addr = 0;           /* local ipv4 address */
1619         u32 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, addr;
1658         u32 your_seq, mask;
1659         u32 local;
1660         u16 unused;
1661
1662         if (skb->len < 14)
1663                 return;
1664
1665         p = skb->data;
1666         p += get_u32(p, &code);
1667
1668         switch (code) {
1669         case CISCO_SLARP_REQUEST:
1670                 lp->cisco_yourseq = 0;
1671                 isdn_net_ciscohdlck_slarp_send_reply(lp);
1672                 break;
1673         case CISCO_SLARP_REPLY:
1674                 addr = ntohl(*(u32 *)p);
1675                 mask = ntohl(*(u32 *)(p+4));
1676                 if (mask != 0xfffffffc)
1677                         goto slarp_reply_out;
1678                 if ((addr & 3) == 0 || (addr & 3) == 3)
1679                         goto slarp_reply_out;
1680                 local = addr ^ 3;
1681                 printk(KERN_INFO "%s: got slarp reply: "
1682                         "remote ip: %d.%d.%d.%d, "
1683                         "local ip: %d.%d.%d.%d "
1684                         "mask: %d.%d.%d.%d\n",
1685                        lp->name,
1686                        HIPQUAD(addr),
1687                        HIPQUAD(local),
1688                        HIPQUAD(mask));
1689                 break;
1690   slarp_reply_out:
1691                  printk(KERN_INFO "%s: got invalid slarp "
1692                                  "reply (%d.%d.%d.%d/%d.%d.%d.%d) "
1693                                  "- ignored\n", lp->name,
1694                                  HIPQUAD(addr), HIPQUAD(mask));
1695                 break;
1696         case CISCO_SLARP_KEEPALIVE:
1697                 period = (int)((jiffies - lp->cisco_last_slarp_in
1698                                 + HZ/2 - 1) / HZ);
1699                 if (lp->cisco_debserint &&
1700                                 (period != lp->cisco_keepalive_period) &&
1701                                 lp->cisco_last_slarp_in) {
1702                         printk(KERN_DEBUG "%s: Keepalive period mismatch - "
1703                                 "is %d but should be %d.\n",
1704                                 lp->name, period, lp->cisco_keepalive_period);
1705                 }
1706                 lp->cisco_last_slarp_in = jiffies;
1707                 p += get_u32(p, &my_seq);
1708                 p += get_u32(p, &your_seq);
1709                 p += get_u16(p, &unused);
1710                 lp->cisco_yourseq = my_seq;
1711                 lp->cisco_mineseen = your_seq;
1712                 break;
1713         }
1714 }
1715
1716 static void
1717 isdn_net_ciscohdlck_receive(isdn_net_local *lp, struct sk_buff *skb)
1718 {
1719         unsigned char *p;
1720         u8 addr;
1721         u8 ctrl;
1722         u16 type;
1723
1724         if (skb->len < 4)
1725                 goto out_free;
1726
1727         p = skb->data;
1728         p += get_u8 (p, &addr);
1729         p += get_u8 (p, &ctrl);
1730         p += get_u16(p, &type);
1731         skb_pull(skb, 4);
1732
1733         if (addr != CISCO_ADDR_UNICAST && addr != CISCO_ADDR_BROADCAST) {
1734                 printk(KERN_WARNING "%s: Unknown Cisco addr 0x%02x\n",
1735                        lp->name, addr);
1736                 goto out_free;
1737         }
1738         if (ctrl != CISCO_CTRL) {
1739                 printk(KERN_WARNING "%s: Unknown Cisco ctrl 0x%02x\n",
1740                        lp->name, ctrl);
1741                 goto out_free;
1742         }
1743
1744         switch (type) {
1745         case CISCO_TYPE_SLARP:
1746                 isdn_net_ciscohdlck_slarp_in(lp, skb);
1747                 goto out_free;
1748         case CISCO_TYPE_CDP:
1749                 if (lp->cisco_debserint)
1750                         printk(KERN_DEBUG "%s: Received CDP packet. use "
1751                                 "\"no cdp enable\" on cisco.\n", lp->name);
1752                 goto out_free;
1753         default:
1754                 /* no special cisco protocol */
1755                 skb->protocol = htons(type);
1756                 netif_rx(skb);
1757                 return;
1758         }
1759
1760  out_free:
1761         kfree_skb(skb);
1762 }
1763
1764 /*
1765  * Got a packet from ISDN-Channel.
1766  */
1767 static void
1768 isdn_net_receive(struct net_device *ndev, struct sk_buff *skb)
1769 {
1770         isdn_net_local *lp = (isdn_net_local *) ndev->priv;
1771         isdn_net_local *olp = lp;       /* original 'lp' */
1772 #ifdef CONFIG_ISDN_X25
1773         struct concap_proto *cprot = lp -> netdev -> cprot;
1774 #endif
1775         lp->transcount += skb->len;
1776
1777         lp->stats.rx_packets++;
1778         lp->stats.rx_bytes += skb->len;
1779         if (lp->master) {
1780                 /* Bundling: If device is a slave-device, deliver to master, also
1781                  * handle master's statistics and hangup-timeout
1782                  */
1783                 ndev = lp->master;
1784                 lp = (isdn_net_local *) ndev->priv;
1785                 lp->stats.rx_packets++;
1786                 lp->stats.rx_bytes += skb->len;
1787         }
1788         skb->dev = ndev;
1789         skb->input_dev = ndev;
1790         skb->pkt_type = PACKET_HOST;
1791         skb->mac.raw = skb->data;
1792 #ifdef ISDN_DEBUG_NET_DUMP
1793         isdn_dumppkt("R:", skb->data, skb->len, 40);
1794 #endif
1795         switch (lp->p_encap) {
1796                 case ISDN_NET_ENCAP_ETHER:
1797                         /* Ethernet over ISDN */
1798                         olp->huptimer = 0;
1799                         lp->huptimer = 0;
1800                         skb->protocol = isdn_net_type_trans(skb, ndev);
1801                         break;
1802                 case ISDN_NET_ENCAP_UIHDLC:
1803                         /* HDLC with UI-frame (for ispa with -h1 option) */
1804                         olp->huptimer = 0;
1805                         lp->huptimer = 0;
1806                         skb_pull(skb, 2);
1807                         /* Fall through */
1808                 case ISDN_NET_ENCAP_RAWIP:
1809                         /* RAW-IP without MAC-Header */
1810                         olp->huptimer = 0;
1811                         lp->huptimer = 0;
1812                         skb->protocol = htons(ETH_P_IP);
1813                         break;
1814                 case ISDN_NET_ENCAP_CISCOHDLCK:
1815                         isdn_net_ciscohdlck_receive(lp, skb);
1816                         return;
1817                 case ISDN_NET_ENCAP_CISCOHDLC:
1818                         /* CISCO-HDLC IP with type field and  fake I-frame-header */
1819                         skb_pull(skb, 2);
1820                         /* Fall through */
1821                 case ISDN_NET_ENCAP_IPTYP:
1822                         /* IP with type field */
1823                         olp->huptimer = 0;
1824                         lp->huptimer = 0;
1825                         skb->protocol = *(unsigned short *) &(skb->data[0]);
1826                         skb_pull(skb, 2);
1827                         if (*(unsigned short *) skb->data == 0xFFFF)
1828                                 skb->protocol = htons(ETH_P_802_3);
1829                         break;
1830 #ifdef CONFIG_ISDN_PPP
1831                 case ISDN_NET_ENCAP_SYNCPPP:
1832                         /* huptimer is done in isdn_ppp_push_higher */
1833                         isdn_ppp_receive(lp->netdev, olp, skb);
1834                         return;
1835 #endif
1836
1837                 default:
1838 #ifdef CONFIG_ISDN_X25
1839                   /* try if there are generic sync_device receiver routines */
1840                         if(cprot) if(cprot -> pops)
1841                                 if( cprot -> pops -> data_ind){
1842                                         cprot -> pops -> data_ind(cprot,skb);
1843                                         return;
1844                                 };
1845 #endif /* CONFIG_ISDN_X25 */
1846                         printk(KERN_WARNING "%s: unknown encapsulation, dropping\n",
1847                                lp->name);
1848                         kfree_skb(skb);
1849                         return;
1850         }
1851
1852         netif_rx(skb);
1853         return;
1854 }
1855
1856 /*
1857  * A packet arrived via ISDN. Search interface-chain for a corresponding
1858  * interface. If found, deliver packet to receiver-function and return 1,
1859  * else return 0.
1860  */
1861 int
1862 isdn_net_rcv_skb(int idx, struct sk_buff *skb)
1863 {
1864         isdn_net_dev *p = dev->rx_netdev[idx];
1865
1866         if (p) {
1867                 isdn_net_local *lp = p->local;
1868                 if ((lp->flags & ISDN_NET_CONNECTED) &&
1869                     (!lp->dialstate)) {
1870                         isdn_net_receive(&p->dev, skb);
1871                         return 1;
1872                 }
1873         }
1874         return 0;
1875 }
1876
1877 static int
1878 my_eth_header(struct sk_buff *skb, struct net_device *dev, unsigned short type,
1879               void *daddr, void *saddr, unsigned len)
1880 {
1881         struct ethhdr *eth = (struct ethhdr *) skb_push(skb, ETH_HLEN);
1882
1883         /*
1884          * Set the protocol type. For a packet of type ETH_P_802_3 we
1885          * put the length here instead. It is up to the 802.2 layer to
1886          * carry protocol information.
1887          */
1888
1889         if (type != ETH_P_802_3)
1890                 eth->h_proto = htons(type);
1891         else
1892                 eth->h_proto = htons(len);
1893
1894         /*
1895          * Set the source hardware address.
1896          */
1897         if (saddr)
1898                 memcpy(eth->h_source, saddr, dev->addr_len);
1899         else
1900                 memcpy(eth->h_source, dev->dev_addr, dev->addr_len);
1901
1902         /*
1903          * Anyway, the loopback-device should never use this function...
1904          */
1905
1906         if (dev->flags & (IFF_LOOPBACK | IFF_NOARP)) {
1907                 memset(eth->h_dest, 0, dev->addr_len);
1908                 return ETH_HLEN /*(dev->hard_header_len)*/;
1909         }
1910         if (daddr) {
1911                 memcpy(eth->h_dest, daddr, dev->addr_len);
1912                 return ETH_HLEN /*dev->hard_header_len*/;
1913         }
1914         return -ETH_HLEN /*dev->hard_header_len*/;
1915 }
1916
1917 /*
1918  *  build an header
1919  *  depends on encaps that is being used.
1920  */
1921
1922 static int
1923 isdn_net_header(struct sk_buff *skb, struct net_device *dev, unsigned short type,
1924                 void *daddr, void *saddr, unsigned plen)
1925 {
1926         isdn_net_local *lp = dev->priv;
1927         unsigned char *p;
1928         ushort len = 0;
1929
1930         switch (lp->p_encap) {
1931                 case ISDN_NET_ENCAP_ETHER:
1932                         len = my_eth_header(skb, dev, type, daddr, saddr, plen);
1933                         break;
1934 #ifdef CONFIG_ISDN_PPP
1935                 case ISDN_NET_ENCAP_SYNCPPP:
1936                         /* stick on a fake header to keep fragmentation code happy. */
1937                         len = IPPP_MAX_HEADER;
1938                         skb_push(skb,len);
1939                         break;
1940 #endif
1941                 case ISDN_NET_ENCAP_RAWIP:
1942                         printk(KERN_WARNING "isdn_net_header called with RAW_IP!\n");
1943                         len = 0;
1944                         break;
1945                 case ISDN_NET_ENCAP_IPTYP:
1946                         /* ethernet type field */
1947                         *((ushort *) skb_push(skb, 2)) = htons(type);
1948                         len = 2;
1949                         break;
1950                 case ISDN_NET_ENCAP_UIHDLC:
1951                         /* HDLC with UI-Frames (for ispa with -h1 option) */
1952                         *((ushort *) skb_push(skb, 2)) = htons(0x0103);
1953                         len = 2;
1954                         break;
1955                 case ISDN_NET_ENCAP_CISCOHDLC:
1956                 case ISDN_NET_ENCAP_CISCOHDLCK:
1957                         p = skb_push(skb, 4);
1958                         p += put_u8 (p, CISCO_ADDR_UNICAST);
1959                         p += put_u8 (p, CISCO_CTRL);
1960                         p += put_u16(p, type);
1961                         len = 4;
1962                         break;
1963 #ifdef CONFIG_ISDN_X25
1964                 default:
1965                   /* try if there are generic concap protocol routines */
1966                         if( lp-> netdev -> cprot ){
1967                                 printk(KERN_WARNING "isdn_net_header called with concap_proto!\n");
1968                                 len = 0;
1969                                 break;
1970                         }
1971                         break;
1972 #endif /* CONFIG_ISDN_X25 */
1973         }
1974         return len;
1975 }
1976
1977 /* We don't need to send arp, because we have point-to-point connections. */
1978 static int
1979 isdn_net_rebuild_header(struct sk_buff *skb)
1980 {
1981         struct net_device *dev = skb->dev;
1982         isdn_net_local *lp = dev->priv;
1983         int ret = 0;
1984
1985         if (lp->p_encap == ISDN_NET_ENCAP_ETHER) {
1986                 struct ethhdr *eth = (struct ethhdr *) skb->data;
1987
1988                 /*
1989                  *      Only ARP/IP is currently supported
1990                  */
1991
1992                 if (eth->h_proto != htons(ETH_P_IP)) {
1993                         printk(KERN_WARNING
1994                                "isdn_net: %s don't know how to resolve type %d addresses?\n",
1995                                dev->name, (int) eth->h_proto);
1996                         memcpy(eth->h_source, dev->dev_addr, dev->addr_len);
1997                         return 0;
1998                 }
1999                 /*
2000                  *      Try to get ARP to resolve the header.
2001                  */
2002 #ifdef CONFIG_INET
2003                 ret = arp_find(eth->h_dest, skb);
2004 #endif
2005         }
2006         return ret;
2007 }
2008
2009 /*
2010  * Interface-setup. (just after registering a new interface)
2011  */
2012 static int
2013 isdn_net_init(struct net_device *ndev)
2014 {
2015         ushort max_hlhdr_len = 0;
2016         isdn_net_local *lp = (isdn_net_local *) ndev->priv;
2017         int drvidx, i;
2018
2019         ether_setup(ndev);
2020         lp->org_hhc = ndev->hard_header_cache;
2021         lp->org_hcu = ndev->header_cache_update;
2022
2023         /* Setup the generic properties */
2024
2025         ndev->hard_header = NULL;
2026         ndev->hard_header_cache = NULL;
2027         ndev->header_cache_update = NULL;
2028         ndev->mtu = 1500;
2029         ndev->flags = IFF_NOARP|IFF_POINTOPOINT;
2030         ndev->type = ARPHRD_ETHER;
2031         ndev->addr_len = ETH_ALEN;
2032
2033         /* for clients with MPPP maybe higher values better */
2034         ndev->tx_queue_len = 30;
2035
2036         for (i = 0; i < ETH_ALEN; i++)
2037                 ndev->broadcast[i] = 0xff;
2038
2039         /* The ISDN-specific entries in the device structure. */
2040         ndev->open = &isdn_net_open;
2041         ndev->hard_start_xmit = &isdn_net_start_xmit;
2042
2043         /*
2044          *  up till binding we ask the protocol layer to reserve as much
2045          *  as we might need for HL layer
2046          */
2047
2048         for (drvidx = 0; drvidx < ISDN_MAX_DRIVERS; drvidx++)
2049                 if (dev->drv[drvidx])
2050                         if (max_hlhdr_len < dev->drv[drvidx]->interface->hl_hdrlen)
2051                                 max_hlhdr_len = dev->drv[drvidx]->interface->hl_hdrlen;
2052
2053         ndev->hard_header_len = ETH_HLEN + max_hlhdr_len;
2054         ndev->stop = &isdn_net_close;
2055         ndev->get_stats = &isdn_net_get_stats;
2056         ndev->rebuild_header = &isdn_net_rebuild_header;
2057         ndev->do_ioctl = NULL;
2058         return 0;
2059 }
2060
2061 static void
2062 isdn_net_swapbind(int drvidx)
2063 {
2064         isdn_net_dev *p;
2065
2066 #ifdef ISDN_DEBUG_NET_ICALL
2067         printk(KERN_DEBUG "n_fi: swapping ch of %d\n", drvidx);
2068 #endif
2069         p = dev->netdev;
2070         while (p) {
2071                 if (p->local->pre_device == drvidx)
2072                         switch (p->local->pre_channel) {
2073                                 case 0:
2074                                         p->local->pre_channel = 1;
2075                                         break;
2076                                 case 1:
2077                                         p->local->pre_channel = 0;
2078                                         break;
2079                         }
2080                 p = (isdn_net_dev *) p->next;
2081         }
2082 }
2083
2084 static void
2085 isdn_net_swap_usage(int i1, int i2)
2086 {
2087         int u1 = dev->usage[i1] & ISDN_USAGE_EXCLUSIVE;
2088         int u2 = dev->usage[i2] & ISDN_USAGE_EXCLUSIVE;
2089
2090 #ifdef ISDN_DEBUG_NET_ICALL
2091         printk(KERN_DEBUG "n_fi: usage of %d and %d\n", i1, i2);
2092 #endif
2093         dev->usage[i1] &= ~ISDN_USAGE_EXCLUSIVE;
2094         dev->usage[i1] |= u2;
2095         dev->usage[i2] &= ~ISDN_USAGE_EXCLUSIVE;
2096         dev->usage[i2] |= u1;
2097         isdn_info_update();
2098 }
2099
2100 /*
2101  * An incoming call-request has arrived.
2102  * Search the interface-chain for an appropriate interface.
2103  * If found, connect the interface to the ISDN-channel and initiate
2104  * D- and B-Channel-setup. If secure-flag is set, accept only
2105  * configured phone-numbers. If callback-flag is set, initiate
2106  * callback-dialing.
2107  *
2108  * Return-Value: 0 = No appropriate interface for this call.
2109  *               1 = Call accepted
2110  *               2 = Reject call, wait cbdelay, then call back
2111  *               3 = Reject call
2112  *               4 = Wait cbdelay, then call back
2113  *               5 = No appropriate interface for this call,
2114  *                   would eventually match if CID was longer.
2115  */
2116
2117 int
2118 isdn_net_find_icall(int di, int ch, int idx, setup_parm *setup)
2119 {
2120         char *eaz;
2121         int si1;
2122         int si2;
2123         int ematch;
2124         int wret;
2125         int swapped;
2126         int sidx = 0;
2127         u_long flags;
2128         isdn_net_dev *p;
2129         isdn_net_phone *n;
2130         char nr[32];
2131         char *my_eaz;
2132
2133         /* Search name in netdev-chain */
2134         if (!setup->phone[0]) {
2135                 nr[0] = '0';
2136                 nr[1] = '\0';
2137                 printk(KERN_INFO "isdn_net: Incoming call without OAD, assuming '0'\n");
2138         } else
2139                 strcpy(nr, setup->phone);
2140         si1 = (int) setup->si1;
2141         si2 = (int) setup->si2;
2142         if (!setup->eazmsn[0]) {
2143                 printk(KERN_WARNING "isdn_net: Incoming call without CPN, assuming '0'\n");
2144                 eaz = "0";
2145         } else
2146                 eaz = setup->eazmsn;
2147         if (dev->net_verbose > 1)
2148                 printk(KERN_INFO "isdn_net: call from %s,%d,%d -> %s\n", nr, si1, si2, eaz);
2149         /* Accept DATA and VOICE calls at this stage
2150          * local eaz is checked later for allowed call types
2151          */
2152         if ((si1 != 7) && (si1 != 1)) {
2153                 if (dev->net_verbose > 1)
2154                         printk(KERN_INFO "isdn_net: Service-Indicator not 1 or 7, ignored\n");
2155                 return 0;
2156         }
2157         n = (isdn_net_phone *) 0;
2158         p = dev->netdev;
2159         ematch = wret = swapped = 0;
2160 #ifdef ISDN_DEBUG_NET_ICALL
2161         printk(KERN_DEBUG "n_fi: di=%d ch=%d idx=%d usg=%d\n", di, ch, idx,
2162                 dev->usage[idx]);
2163 #endif
2164         while (p) {
2165                 int matchret;
2166                 isdn_net_local *lp = p->local;
2167
2168                 /* If last check has triggered as binding-swap, revert it */
2169                 switch (swapped) {
2170                         case 2:
2171                                 isdn_net_swap_usage(idx, sidx);
2172                                 /* fall through */
2173                         case 1:
2174                                 isdn_net_swapbind(di);
2175                                 break;
2176                 }
2177                 swapped = 0;
2178                 /* check acceptable call types for DOV */
2179                 my_eaz = isdn_map_eaz2msn(lp->msn, di);
2180                 if (si1 == 1) { /* it's a DOV call, check if we allow it */
2181                         if (*my_eaz == 'v' || *my_eaz == 'V' ||
2182                             *my_eaz == 'b' || *my_eaz == 'B')
2183                                 my_eaz++; /* skip to allow a match */
2184                         else
2185                                 my_eaz = NULL; /* force non match */
2186                 } else { /* it's a DATA call, check if we allow it */
2187                         if (*my_eaz == 'b' || *my_eaz == 'B')
2188                                 my_eaz++; /* skip to allow a match */
2189                 }
2190                 if (my_eaz)
2191                         matchret = isdn_msncmp(eaz, my_eaz);
2192                 else
2193                         matchret = 1;
2194                 if (!matchret)
2195                         ematch = 1;
2196
2197                 /* Remember if more numbers eventually can match */
2198                 if (matchret > wret)
2199                         wret = matchret;
2200 #ifdef ISDN_DEBUG_NET_ICALL
2201                 printk(KERN_DEBUG "n_fi: if='%s', l.msn=%s, l.flags=%d, l.dstate=%d\n",
2202                        lp->name, lp->msn, lp->flags, lp->dialstate);
2203 #endif
2204                 if ((!matchret) &&                                        /* EAZ is matching   */
2205                     (((!(lp->flags & ISDN_NET_CONNECTED)) &&              /* but not connected */
2206                       (USG_NONE(dev->usage[idx]))) ||                     /* and ch. unused or */
2207                      ((((lp->dialstate == 4) || (lp->dialstate == 12)) && /* if dialing        */
2208                        (!(lp->flags & ISDN_NET_CALLBACK)))                /* but no callback   */
2209                      )))
2210                          {
2211 #ifdef ISDN_DEBUG_NET_ICALL
2212                         printk(KERN_DEBUG "n_fi: match1, pdev=%d pch=%d\n",
2213                                lp->pre_device, lp->pre_channel);
2214 #endif
2215                         if (dev->usage[idx] & ISDN_USAGE_EXCLUSIVE) {
2216                                 if ((lp->pre_channel != ch) ||
2217                                     (lp->pre_device != di)) {
2218                                         /* Here we got a problem:
2219                                          * If using an ICN-Card, an incoming call is always signaled on
2220                                          * on the first channel of the card, if both channels are
2221                                          * down. However this channel may be bound exclusive. If the
2222                                          * second channel is free, this call should be accepted.
2223                                          * The solution is horribly but it runs, so what:
2224                                          * We exchange the exclusive bindings of the two channels, the
2225                                          * corresponding variables in the interface-structs.
2226                                          */
2227                                         if (ch == 0) {
2228                                                 sidx = isdn_dc2minor(di, 1);
2229 #ifdef ISDN_DEBUG_NET_ICALL
2230                                                 printk(KERN_DEBUG "n_fi: ch is 0\n");
2231 #endif
2232                                                 if (USG_NONE(dev->usage[sidx])) {
2233                                                         /* Second Channel is free, now see if it is bound
2234                                                          * exclusive too. */
2235                                                         if (dev->usage[sidx] & ISDN_USAGE_EXCLUSIVE) {
2236 #ifdef ISDN_DEBUG_NET_ICALL
2237                                                                 printk(KERN_DEBUG "n_fi: 2nd channel is down and bound\n");
2238 #endif
2239                                                                 /* Yes, swap bindings only, if the original
2240                                                                  * binding is bound to channel 1 of this driver */
2241                                                                 if ((lp->pre_device == di) &&
2242                                                                     (lp->pre_channel == 1)) {
2243                                                                         isdn_net_swapbind(di);
2244                                                                         swapped = 1;
2245                                                                 } else {
2246                                                                         /* ... else iterate next device */
2247                                                                         p = (isdn_net_dev *) p->next;
2248                                                                         continue;
2249                                                                 }
2250                                                         } else {
2251 #ifdef ISDN_DEBUG_NET_ICALL
2252                                                                 printk(KERN_DEBUG "n_fi: 2nd channel is down and unbound\n");
2253 #endif
2254                                                                 /* No, swap always and swap excl-usage also */
2255                                                                 isdn_net_swap_usage(idx, sidx);
2256                                                                 isdn_net_swapbind(di);
2257                                                                 swapped = 2;
2258                                                         }
2259                                                         /* Now check for exclusive binding again */
2260 #ifdef ISDN_DEBUG_NET_ICALL
2261                                                         printk(KERN_DEBUG "n_fi: final check\n");
2262 #endif
2263                                                         if ((dev->usage[idx] & ISDN_USAGE_EXCLUSIVE) &&
2264                                                             ((lp->pre_channel != ch) ||
2265                                                              (lp->pre_device != di))) {
2266 #ifdef ISDN_DEBUG_NET_ICALL
2267                                                                 printk(KERN_DEBUG "n_fi: final check failed\n");
2268 #endif
2269                                                                 p = (isdn_net_dev *) p->next;
2270                                                                 continue;
2271                                                         }
2272                                                 }
2273                                         } else {
2274                                                 /* We are already on the second channel, so nothing to do */
2275 #ifdef ISDN_DEBUG_NET_ICALL
2276                                                 printk(KERN_DEBUG "n_fi: already on 2nd channel\n");
2277 #endif
2278                                         }
2279                                 }
2280                         }
2281 #ifdef ISDN_DEBUG_NET_ICALL
2282                         printk(KERN_DEBUG "n_fi: match2\n");
2283 #endif
2284                         n = lp->phone[0];
2285                         if (lp->flags & ISDN_NET_SECURE) {
2286                                 while (n) {
2287                                         if (!isdn_msncmp(nr, n->num))
2288                                                 break;
2289                                         n = (isdn_net_phone *) n->next;
2290                                 }
2291                         }
2292                         if (n || (!(lp->flags & ISDN_NET_SECURE))) {
2293 #ifdef ISDN_DEBUG_NET_ICALL
2294                                 printk(KERN_DEBUG "n_fi: match3\n");
2295 #endif
2296                                 /* matching interface found */
2297
2298                                 /*
2299                                  * Is the state STOPPED?
2300                                  * If so, no dialin is allowed,
2301                                  * so reject actively.
2302                                  * */
2303                                 if (ISDN_NET_DIALMODE(*lp) == ISDN_NET_DM_OFF) {
2304                                         printk(KERN_INFO "incoming call, interface %s `stopped' -> rejected\n",
2305                                                lp->name);
2306                                         return 3;
2307                                 }
2308                                 /*
2309                                  * Is the interface up?
2310                                  * If not, reject the call actively.
2311                                  */
2312                                 if (!isdn_net_device_started(p)) {
2313                                         printk(KERN_INFO "%s: incoming call, interface down -> rejected\n",
2314                                                lp->name);
2315                                         return 3;
2316                                 }
2317                                 /* Interface is up, now see if it's a slave. If so, see if
2318                                  * it's master and parent slave is online. If not, reject the call.
2319                                  */
2320                                 if (lp->master) {
2321                                         isdn_net_local *mlp = (isdn_net_local *) lp->master->priv;
2322                                         printk(KERN_DEBUG "ICALLslv: %s\n", lp->name);
2323                                         printk(KERN_DEBUG "master=%s\n", mlp->name);
2324                                         if (mlp->flags & ISDN_NET_CONNECTED) {
2325                                                 printk(KERN_DEBUG "master online\n");
2326                                                 /* Master is online, find parent-slave (master if first slave) */
2327                                                 while (mlp->slave) {
2328                                                         if ((isdn_net_local *) mlp->slave->priv == lp)
2329                                                                 break;
2330                                                         mlp = (isdn_net_local *) mlp->slave->priv;
2331                                                 }
2332                                         } else
2333                                                 printk(KERN_DEBUG "master offline\n");
2334                                         /* Found parent, if it's offline iterate next device */
2335                                         printk(KERN_DEBUG "mlpf: %d\n", mlp->flags & ISDN_NET_CONNECTED);
2336                                         if (!(mlp->flags & ISDN_NET_CONNECTED)) {
2337                                                 p = (isdn_net_dev *) p->next;
2338                                                 continue;
2339                                         }
2340                                 }
2341                                 if (lp->flags & ISDN_NET_CALLBACK) {
2342                                         int chi;
2343                                         /*
2344                                          * Is the state MANUAL?
2345                                          * If so, no callback can be made,
2346                                          * so reject actively.
2347                                          * */
2348                                         if (ISDN_NET_DIALMODE(*lp) == ISDN_NET_DM_OFF) {
2349                                                 printk(KERN_INFO "incoming call for callback, interface %s `off' -> rejected\n",
2350                                                        lp->name);
2351                                                 return 3;
2352                                         }
2353                                         printk(KERN_DEBUG "%s: call from %s -> %s, start callback\n",
2354                                                lp->name, nr, eaz);
2355                                         if (lp->phone[1]) {
2356                                                 /* Grab a free ISDN-Channel */
2357                                                 spin_lock_irqsave(&dev->lock, flags);
2358                                                 if ((chi =
2359                                                         isdn_get_free_channel(
2360                                                                 ISDN_USAGE_NET,
2361                                                                 lp->l2_proto,
2362                                                                 lp->l3_proto,
2363                                                                 lp->pre_device,
2364                                                                 lp->pre_channel,
2365                                                                 lp->msn)
2366                                                                 ) < 0) {
2367
2368                                                         printk(KERN_WARNING "isdn_net_find_icall: No channel for %s\n", lp->name);
2369                                                         spin_unlock_irqrestore(&dev->lock, flags);
2370                                                         return 0;
2371                                                 }
2372                                                 /* Setup dialstate. */
2373                                                 lp->dtimer = 0;
2374                                                 lp->dialstate = 11;
2375                                                 /* Connect interface with channel */
2376                                                 isdn_net_bind_channel(lp, chi);
2377 #ifdef CONFIG_ISDN_PPP
2378                                                 if (lp->p_encap == ISDN_NET_ENCAP_SYNCPPP)
2379                                                         if (isdn_ppp_bind(lp) < 0) {
2380                                                                 spin_unlock_irqrestore(&dev->lock, flags);
2381                                                                 isdn_net_unbind_channel(lp);
2382                                                                 return 0;
2383                                                         }
2384 #endif
2385                                                 spin_unlock_irqrestore(&dev->lock, flags);
2386                                                 /* Initiate dialing by returning 2 or 4 */
2387                                                 return (lp->flags & ISDN_NET_CBHUP) ? 2 : 4;
2388                                         } else
2389                                                 printk(KERN_WARNING "isdn_net: %s: No phone number\n", lp->name);
2390                                         return 0;
2391                                 } else {
2392                                         printk(KERN_DEBUG "%s: call from %s -> %s accepted\n", lp->name, nr,
2393                                                eaz);
2394                                         /* if this interface is dialing, it does it probably on a different
2395                                            device, so free this device */
2396                                         if ((lp->dialstate == 4) || (lp->dialstate == 12)) {
2397 #ifdef CONFIG_ISDN_PPP
2398                                                 if (lp->p_encap == ISDN_NET_ENCAP_SYNCPPP)
2399                                                         isdn_ppp_free(lp);
2400 #endif
2401                                                 isdn_net_lp_disconnected(lp);
2402                                                 isdn_free_channel(lp->isdn_device, lp->isdn_channel,
2403                                                          ISDN_USAGE_NET);
2404                                         }
2405                                         spin_lock_irqsave(&dev->lock, flags);
2406                                         dev->usage[idx] &= ISDN_USAGE_EXCLUSIVE;
2407                                         dev->usage[idx] |= ISDN_USAGE_NET;
2408                                         strcpy(dev->num[idx], nr);
2409                                         isdn_info_update();
2410                                         dev->st_netdev[idx] = lp->netdev;
2411                                         lp->isdn_device = di;
2412                                         lp->isdn_channel = ch;
2413                                         lp->ppp_slot = -1;
2414                                         lp->flags |= ISDN_NET_CONNECTED;
2415                                         lp->dialstate = 7;
2416                                         lp->dtimer = 0;
2417                                         lp->outgoing = 0;
2418                                         lp->huptimer = 0;
2419                                         lp->hupflags |= ISDN_WAITCHARGE;
2420                                         lp->hupflags &= ~ISDN_HAVECHARGE;
2421 #ifdef CONFIG_ISDN_PPP
2422                                         if (lp->p_encap == ISDN_NET_ENCAP_SYNCPPP) {
2423                                                 if (isdn_ppp_bind(lp) < 0) {
2424                                                         isdn_net_unbind_channel(lp);
2425                                                         spin_unlock_irqrestore(&dev->lock, flags);
2426                                                         return 0;
2427                                                 }
2428                                         }
2429 #endif
2430                                         spin_unlock_irqrestore(&dev->lock, flags);
2431                                         return 1;
2432                                 }
2433                         }
2434                 }
2435                 p = (isdn_net_dev *) p->next;
2436         }
2437         /* If none of configured EAZ/MSN matched and not verbose, be silent */
2438         if (!ematch || dev->net_verbose)
2439                 printk(KERN_INFO "isdn_net: call from %s -> %d %s ignored\n", nr, di, eaz);
2440         return (wret == 2)?5:0;
2441 }
2442
2443 /*
2444  * Search list of net-interfaces for an interface with given name.
2445  */
2446 isdn_net_dev *
2447 isdn_net_findif(char *name)
2448 {
2449         isdn_net_dev *p = dev->netdev;
2450
2451         while (p) {
2452                 if (!strcmp(p->local->name, name))
2453                         return p;
2454                 p = (isdn_net_dev *) p->next;
2455         }
2456         return (isdn_net_dev *) NULL;
2457 }
2458
2459 /*
2460  * Force a net-interface to dial out.
2461  * This is called from the userlevel-routine below or
2462  * from isdn_net_start_xmit().
2463  */
2464 static int
2465 isdn_net_force_dial_lp(isdn_net_local * lp)
2466 {
2467         if ((!(lp->flags & ISDN_NET_CONNECTED)) && !lp->dialstate) {
2468                 int chi;
2469                 if (lp->phone[1]) {
2470                         ulong flags;
2471
2472                         /* Grab a free ISDN-Channel */
2473                         spin_lock_irqsave(&dev->lock, flags);
2474                         if ((chi = isdn_get_free_channel(
2475                                         ISDN_USAGE_NET,
2476                                         lp->l2_proto,
2477                                         lp->l3_proto,
2478                                         lp->pre_device,
2479                                         lp->pre_channel,
2480                                         lp->msn)) < 0) {
2481                                 printk(KERN_WARNING "isdn_net_force_dial: No channel for %s\n", lp->name);
2482                                 spin_unlock_irqrestore(&dev->lock, flags);
2483                                 return -EAGAIN;
2484                         }
2485                         lp->dialstate = 1;
2486                         /* Connect interface with channel */
2487                         isdn_net_bind_channel(lp, chi);
2488 #ifdef CONFIG_ISDN_PPP
2489                         if (lp->p_encap == ISDN_NET_ENCAP_SYNCPPP)
2490                                 if (isdn_ppp_bind(lp) < 0) {
2491                                         isdn_net_unbind_channel(lp);
2492                                         spin_unlock_irqrestore(&dev->lock, flags);
2493                                         return -EAGAIN;
2494                                 }
2495 #endif
2496                         /* Initiate dialing */
2497                         spin_unlock_irqrestore(&dev->lock, flags);
2498                         isdn_net_dial();
2499                         return 0;
2500                 } else
2501                         return -EINVAL;
2502         } else
2503                 return -EBUSY;
2504 }
2505
2506 /*
2507  * This is called from certain upper protocol layers (multilink ppp
2508  * and x25iface encapsulation module) that want to initiate dialing
2509  * themselves.
2510  */
2511 int
2512 isdn_net_dial_req(isdn_net_local * lp)
2513 {
2514         /* is there a better error code? */
2515         if (!(ISDN_NET_DIALMODE(*lp) == ISDN_NET_DM_AUTO)) return -EBUSY;
2516
2517         return isdn_net_force_dial_lp(lp);
2518 }
2519
2520 /*
2521  * Force a net-interface to dial out.
2522  * This is always called from within userspace (ISDN_IOCTL_NET_DIAL).
2523  */
2524 int
2525 isdn_net_force_dial(char *name)
2526 {
2527         isdn_net_dev *p = isdn_net_findif(name);
2528
2529         if (!p)
2530                 return -ENODEV;
2531         return (isdn_net_force_dial_lp(p->local));
2532 }
2533
2534 /*
2535  * Allocate a new network-interface and initialize its data structures.
2536  */
2537 char *
2538 isdn_net_new(char *name, struct net_device *master)
2539 {
2540         isdn_net_dev *netdev;
2541
2542         /* Avoid creating an existing interface */
2543         if (isdn_net_findif(name)) {
2544                 printk(KERN_WARNING "isdn_net: interface %s already exists\n", name);
2545                 return NULL;
2546         }
2547         if (!(netdev = (isdn_net_dev *) kmalloc(sizeof(isdn_net_dev), GFP_KERNEL))) {
2548                 printk(KERN_WARNING "isdn_net: Could not allocate net-device\n");
2549                 return NULL;
2550         }
2551         memset(netdev, 0, sizeof(isdn_net_dev));
2552         if (!(netdev->local = (isdn_net_local *) kmalloc(sizeof(isdn_net_local), GFP_KERNEL))) {
2553                 printk(KERN_WARNING "isdn_net: Could not allocate device locals\n");
2554                 kfree(netdev);
2555                 return NULL;
2556         }
2557         memset(netdev->local, 0, sizeof(isdn_net_local));
2558         if (name == NULL)
2559                 strcpy(netdev->local->name, "         ");
2560         else
2561                 strcpy(netdev->local->name, name);
2562         strcpy(netdev->dev.name, netdev->local->name);
2563         netdev->dev.priv = netdev->local;
2564         netdev->dev.init = isdn_net_init;
2565         netdev->local->p_encap = ISDN_NET_ENCAP_RAWIP;
2566         if (master) {
2567                 /* Device shall be a slave */
2568                 struct net_device *p = (((isdn_net_local *) master->priv)->slave);
2569                 struct net_device *q = master;
2570
2571                 netdev->local->master = master;
2572                 /* Put device at end of slave-chain */
2573                 while (p) {
2574                         q = p;
2575                         p = (((isdn_net_local *) p->priv)->slave);
2576                 }
2577                 ((isdn_net_local *) q->priv)->slave = &(netdev->dev);
2578         } else {
2579                 /* Device shall be a master */
2580                 /*
2581                  * Watchdog timer (currently) for master only.
2582                  */
2583                 netdev->dev.tx_timeout = isdn_net_tx_timeout;
2584                 netdev->dev.watchdog_timeo = ISDN_NET_TX_TIMEOUT;
2585                 if (register_netdev(&netdev->dev) != 0) {
2586                         printk(KERN_WARNING "isdn_net: Could not register net-device\n");
2587                         kfree(netdev->local);
2588                         kfree(netdev);
2589                         return NULL;
2590                 }
2591         }
2592         netdev->local->magic = ISDN_NET_MAGIC;
2593
2594         netdev->queue = netdev->local;
2595         spin_lock_init(&netdev->queue_lock);
2596
2597         netdev->local->last = netdev->local;
2598         netdev->local->netdev = netdev;
2599         netdev->local->next = netdev->local;
2600
2601         INIT_WORK(&netdev->local->tqueue, (void *)(void *) isdn_net_softint, netdev->local);
2602         spin_lock_init(&netdev->local->xmit_lock);
2603
2604         netdev->local->isdn_device = -1;
2605         netdev->local->isdn_channel = -1;
2606         netdev->local->pre_device = -1;
2607         netdev->local->pre_channel = -1;
2608         netdev->local->exclusive = -1;
2609         netdev->local->ppp_slot = -1;
2610         netdev->local->pppbind = -1;
2611         skb_queue_head_init(&netdev->local->super_tx_queue);
2612         netdev->local->l2_proto = ISDN_PROTO_L2_X75I;
2613         netdev->local->l3_proto = ISDN_PROTO_L3_TRANS;
2614         netdev->local->triggercps = 6000;
2615         netdev->local->slavedelay = 10 * HZ;
2616         netdev->local->hupflags = ISDN_INHUP;   /* Do hangup even on incoming calls */
2617         netdev->local->onhtime = 10;    /* Default hangup-time for saving costs
2618            of those who forget configuring this */
2619         netdev->local->dialmax = 1;
2620         netdev->local->flags = ISDN_NET_CBHUP | ISDN_NET_DM_MANUAL;     /* Hangup before Callback, manual dial */
2621         netdev->local->cbdelay = 25;    /* Wait 5 secs before Callback */
2622         netdev->local->dialtimeout = -1;  /* Infinite Dial-Timeout */
2623         netdev->local->dialwait = 5 * HZ; /* Wait 5 sec. after failed dial */
2624         netdev->local->dialstarted = 0;   /* Jiffies of last dial-start */
2625         netdev->local->dialwait_timer = 0;  /* Jiffies of earliest next dial-start */
2626
2627         /* Put into to netdev-chain */
2628         netdev->next = (void *) dev->netdev;
2629         dev->netdev = netdev;
2630         return netdev->dev.name;
2631 }
2632
2633 char *
2634 isdn_net_newslave(char *parm)
2635 {
2636         char *p = strchr(parm, ',');
2637         isdn_net_dev *n;
2638         char newname[10];
2639
2640         if (p) {
2641                 /* Slave-Name MUST not be empty */
2642                 if (!strlen(p + 1))
2643                         return NULL;
2644                 strcpy(newname, p + 1);
2645                 *p = 0;
2646                 /* Master must already exist */
2647                 if (!(n = isdn_net_findif(parm)))
2648                         return NULL;
2649                 /* Master must be a real interface, not a slave */
2650                 if (n->local->master)
2651                         return NULL;
2652                 /* Master must not be started yet */
2653                 if (isdn_net_device_started(n))
2654                         return NULL;
2655                 return (isdn_net_new(newname, &(n->dev)));
2656         }
2657         return NULL;
2658 }
2659
2660 /*
2661  * Set interface-parameters.
2662  * Always set all parameters, so the user-level application is responsible
2663  * for not overwriting existing setups. It has to get the current
2664  * setup first, if only selected parameters are to be changed.
2665  */
2666 int
2667 isdn_net_setcfg(isdn_net_ioctl_cfg * cfg)
2668 {
2669         isdn_net_dev *p = isdn_net_findif(cfg->name);
2670         ulong features;
2671         int i;
2672         int drvidx;
2673         int chidx;
2674         char drvid[25];
2675
2676         if (p) {
2677                 isdn_net_local *lp = p->local;
2678
2679                 /* See if any registered driver supports the features we want */
2680                 features = ((1 << cfg->l2_proto) << ISDN_FEATURE_L2_SHIFT) |
2681                         ((1 << cfg->l3_proto) << ISDN_FEATURE_L3_SHIFT);
2682                 for (i = 0; i < ISDN_MAX_DRIVERS; i++)
2683                         if (dev->drv[i])
2684                                 if ((dev->drv[i]->interface->features & features) == features)
2685                                         break;
2686                 if (i == ISDN_MAX_DRIVERS) {
2687                         printk(KERN_WARNING "isdn_net: No driver with selected features\n");
2688                         return -ENODEV;
2689                 }
2690                 if (lp->p_encap != cfg->p_encap){
2691 #ifdef CONFIG_ISDN_X25
2692                         struct concap_proto * cprot = p -> cprot;
2693 #endif
2694                         if (isdn_net_device_started(p)) {
2695                                 printk(KERN_WARNING "%s: cannot change encap when if is up\n",
2696                                        lp->name);
2697                                 return -EBUSY;
2698                         }
2699 #ifdef CONFIG_ISDN_X25
2700                         if( cprot && cprot -> pops )
2701                                 cprot -> pops -> proto_del ( cprot );
2702                         p -> cprot = NULL;
2703                         lp -> dops = NULL;
2704                         /* ... ,  prepare for configuration of new one ... */
2705                         switch ( cfg -> p_encap ){
2706                         case ISDN_NET_ENCAP_X25IFACE:
2707                                 lp -> dops = &isdn_concap_reliable_dl_dops;
2708                         }
2709                         /* ... and allocate new one ... */
2710                         p -> cprot = isdn_concap_new( cfg -> p_encap );
2711                         /* p -> cprot == NULL now if p_encap is not supported
2712                            by means of the concap_proto mechanism */
2713                         /* the protocol is not configured yet; this will
2714                            happen later when isdn_net_reset() is called */
2715 #endif
2716                 }
2717                 switch ( cfg->p_encap ) {
2718                 case ISDN_NET_ENCAP_SYNCPPP:
2719 #ifndef CONFIG_ISDN_PPP
2720                         printk(KERN_WARNING "%s: SyncPPP support not configured\n",
2721                                lp->name);
2722                         return -EINVAL;
2723 #else
2724                         p->dev.type = ARPHRD_PPP;       /* change ARP type */
2725                         p->dev.addr_len = 0;
2726                         p->dev.do_ioctl = isdn_ppp_dev_ioctl;
2727 #endif
2728                         break;
2729                 case ISDN_NET_ENCAP_X25IFACE:
2730 #ifndef CONFIG_ISDN_X25
2731                         printk(KERN_WARNING "%s: isdn-x25 support not configured\n",
2732                                p->local->name);
2733                         return -EINVAL;
2734 #else
2735                         p->dev.type = ARPHRD_X25;       /* change ARP type */
2736                         p->dev.addr_len = 0;
2737 #endif
2738                         break;
2739                 case ISDN_NET_ENCAP_CISCOHDLCK:
2740                         p->dev.do_ioctl = isdn_ciscohdlck_dev_ioctl;
2741                         break;
2742                 default:
2743                         if( cfg->p_encap >= 0 &&
2744                             cfg->p_encap <= ISDN_NET_ENCAP_MAX_ENCAP )
2745                                 break;
2746                         printk(KERN_WARNING
2747                                "%s: encapsulation protocol %d not supported\n",
2748                                p->local->name, cfg->p_encap);
2749                         return -EINVAL;
2750                 }
2751                 if (strlen(cfg->drvid)) {
2752                         /* A bind has been requested ... */
2753                         char *c,
2754                         *e;
2755
2756                         drvidx = -1;
2757                         chidx = -1;
2758                         strcpy(drvid, cfg->drvid);
2759                         if ((c = strchr(drvid, ','))) {
2760                                 /* The channel-number is appended to the driver-Id with a comma */
2761                                 chidx = (int) simple_strtoul(c + 1, &e, 10);
2762                                 if (e == c)
2763                                         chidx = -1;
2764                                 *c = '\0';
2765                         }
2766                         for (i = 0; i < ISDN_MAX_DRIVERS; i++)
2767                                 /* Lookup driver-Id in array */
2768                                 if (!(strcmp(dev->drvid[i], drvid))) {
2769                                         drvidx = i;
2770                                         break;
2771                                 }
2772                         if ((drvidx == -1) || (chidx == -1))
2773                                 /* Either driver-Id or channel-number invalid */
2774                                 return -ENODEV;
2775                 } else {
2776                         /* Parameters are valid, so get them */
2777                         drvidx = lp->pre_device;
2778                         chidx = lp->pre_channel;
2779                 }
2780                 if (cfg->exclusive > 0) {
2781                         unsigned long flags;
2782
2783                         /* If binding is exclusive, try to grab the channel */
2784                         spin_lock_irqsave(&dev->lock, flags);
2785                         if ((i = isdn_get_free_channel(ISDN_USAGE_NET,
2786                                 lp->l2_proto, lp->l3_proto, drvidx,
2787                                 chidx, lp->msn)) < 0) {
2788                                 /* Grab failed, because desired channel is in use */
2789                                 lp->exclusive = -1;
2790                                 spin_unlock_irqrestore(&dev->lock, flags);
2791                                 return -EBUSY;
2792                         }
2793                         /* All went ok, so update isdninfo */
2794                         dev->usage[i] = ISDN_USAGE_EXCLUSIVE;
2795                         isdn_info_update();
2796                         spin_unlock_irqrestore(&dev->lock, flags);
2797                         lp->exclusive = i;
2798                 } else {
2799                         /* Non-exclusive binding or unbind. */
2800                         lp->exclusive = -1;
2801                         if ((lp->pre_device != -1) && (cfg->exclusive == -1)) {
2802                                 isdn_unexclusive_channel(lp->pre_device, lp->pre_channel);
2803                                 isdn_free_channel(lp->pre_device, lp->pre_channel, ISDN_USAGE_NET);
2804                                 drvidx = -1;
2805                                 chidx = -1;
2806                         }
2807                 }
2808                 strcpy(lp->msn, cfg->eaz);
2809                 lp->pre_device = drvidx;
2810                 lp->pre_channel = chidx;
2811                 lp->onhtime = cfg->onhtime;
2812                 lp->charge = cfg->charge;
2813                 lp->l2_proto = cfg->l2_proto;
2814                 lp->l3_proto = cfg->l3_proto;
2815                 lp->cbdelay = cfg->cbdelay;
2816                 lp->dialmax = cfg->dialmax;
2817                 lp->triggercps = cfg->triggercps;
2818                 lp->slavedelay = cfg->slavedelay * HZ;
2819                 lp->pppbind = cfg->pppbind;
2820                 lp->dialtimeout = cfg->dialtimeout >= 0 ? cfg->dialtimeout * HZ : -1;
2821                 lp->dialwait = cfg->dialwait * HZ;
2822                 if (cfg->secure)
2823                         lp->flags |= ISDN_NET_SECURE;
2824                 else
2825                         lp->flags &= ~ISDN_NET_SECURE;
2826                 if (cfg->cbhup)
2827                         lp->flags |= ISDN_NET_CBHUP;
2828                 else
2829                         lp->flags &= ~ISDN_NET_CBHUP;
2830                 switch (cfg->callback) {
2831                         case 0:
2832                                 lp->flags &= ~(ISDN_NET_CALLBACK | ISDN_NET_CBOUT);
2833                                 break;
2834                         case 1:
2835                                 lp->flags |= ISDN_NET_CALLBACK;
2836                                 lp->flags &= ~ISDN_NET_CBOUT;
2837                                 break;
2838                         case 2:
2839                                 lp->flags |= ISDN_NET_CBOUT;
2840                                 lp->flags &= ~ISDN_NET_CALLBACK;
2841                                 break;
2842                 }
2843                 lp->flags &= ~ISDN_NET_DIALMODE_MASK;   /* first all bits off */
2844                 if (cfg->dialmode && !(cfg->dialmode & ISDN_NET_DIALMODE_MASK)) {
2845                         /* old isdnctrl version, where only 0 or 1 is given */
2846                         printk(KERN_WARNING
2847                              "Old isdnctrl version detected! Please update.\n");
2848                         lp->flags |= ISDN_NET_DM_OFF; /* turn on `off' bit */
2849                 }
2850                 else {
2851                         lp->flags |= cfg->dialmode;  /* turn on selected bits */
2852                 }
2853                 if (cfg->chargehup)
2854                         lp->hupflags |= ISDN_CHARGEHUP;
2855                 else
2856                         lp->hupflags &= ~ISDN_CHARGEHUP;
2857                 if (cfg->ihup)
2858                         lp->hupflags |= ISDN_INHUP;
2859                 else
2860                         lp->hupflags &= ~ISDN_INHUP;
2861                 if (cfg->chargeint > 10) {
2862                         lp->hupflags |= ISDN_CHARGEHUP | ISDN_HAVECHARGE | ISDN_MANCHARGE;
2863                         lp->chargeint = cfg->chargeint * HZ;
2864                 }
2865                 if (cfg->p_encap != lp->p_encap) {
2866                         if (cfg->p_encap == ISDN_NET_ENCAP_RAWIP) {
2867                                 p->dev.hard_header = NULL;
2868                                 p->dev.hard_header_cache = NULL;
2869                                 p->dev.header_cache_update = NULL;
2870                                 p->dev.flags = IFF_NOARP|IFF_POINTOPOINT;
2871                         } else {
2872                                 p->dev.hard_header = isdn_net_header;
2873                                 if (cfg->p_encap == ISDN_NET_ENCAP_ETHER) {
2874                                         p->dev.hard_header_cache = lp->org_hhc;
2875                                         p->dev.header_cache_update = lp->org_hcu;
2876                                         p->dev.flags = IFF_BROADCAST | IFF_MULTICAST;
2877                                 } else {
2878                                         p->dev.hard_header_cache = NULL;
2879                                         p->dev.header_cache_update = NULL;
2880                                         p->dev.flags = IFF_NOARP|IFF_POINTOPOINT;
2881                                 }
2882                         }
2883                 }
2884                 lp->p_encap = cfg->p_encap;
2885                 return 0;
2886         }
2887         return -ENODEV;
2888 }
2889
2890 /*
2891  * Perform get-interface-parameters.ioctl
2892  */
2893 int
2894 isdn_net_getcfg(isdn_net_ioctl_cfg * cfg)
2895 {
2896         isdn_net_dev *p = isdn_net_findif(cfg->name);
2897
2898         if (p) {
2899                 isdn_net_local *lp = p->local;
2900
2901                 strcpy(cfg->eaz, lp->msn);
2902                 cfg->exclusive = lp->exclusive;
2903                 if (lp->pre_device >= 0) {
2904                         sprintf(cfg->drvid, "%s,%d", dev->drvid[lp->pre_device],
2905                                 lp->pre_channel);
2906                 } else
2907                         cfg->drvid[0] = '\0';
2908                 cfg->onhtime = lp->onhtime;
2909                 cfg->charge = lp->charge;
2910                 cfg->l2_proto = lp->l2_proto;
2911                 cfg->l3_proto = lp->l3_proto;
2912                 cfg->p_encap = lp->p_encap;
2913                 cfg->secure = (lp->flags & ISDN_NET_SECURE) ? 1 : 0;
2914                 cfg->callback = 0;
2915                 if (lp->flags & ISDN_NET_CALLBACK)
2916                         cfg->callback = 1;
2917                 if (lp->flags & ISDN_NET_CBOUT)
2918                         cfg->callback = 2;
2919                 cfg->cbhup = (lp->flags & ISDN_NET_CBHUP) ? 1 : 0;
2920                 cfg->dialmode = lp->flags & ISDN_NET_DIALMODE_MASK;
2921                 cfg->chargehup = (lp->hupflags & 4) ? 1 : 0;
2922                 cfg->ihup = (lp->hupflags & 8) ? 1 : 0;
2923                 cfg->cbdelay = lp->cbdelay;
2924                 cfg->dialmax = lp->dialmax;
2925                 cfg->triggercps = lp->triggercps;
2926                 cfg->slavedelay = lp->slavedelay / HZ;
2927                 cfg->chargeint = (lp->hupflags & ISDN_CHARGEHUP) ?
2928                     (lp->chargeint / HZ) : 0;
2929                 cfg->pppbind = lp->pppbind;
2930                 cfg->dialtimeout = lp->dialtimeout >= 0 ? lp->dialtimeout / HZ : -1;
2931                 cfg->dialwait = lp->dialwait / HZ;
2932                 if (lp->slave)
2933                         strcpy(cfg->slave, ((isdn_net_local *) lp->slave->priv)->name);
2934                 else
2935                         cfg->slave[0] = '\0';
2936                 if (lp->master)
2937                         strcpy(cfg->master, ((isdn_net_local *) lp->master->priv)->name);
2938                 else
2939                         cfg->master[0] = '\0';
2940                 return 0;
2941         }
2942         return -ENODEV;
2943 }
2944
2945 /*
2946  * Add a phone-number to an interface.
2947  */
2948 int
2949 isdn_net_addphone(isdn_net_ioctl_phone * phone)
2950 {
2951         isdn_net_dev *p = isdn_net_findif(phone->name);
2952         isdn_net_phone *n;
2953
2954         if (p) {
2955                 if (!(n = (isdn_net_phone *) kmalloc(sizeof(isdn_net_phone), GFP_KERNEL)))
2956                         return -ENOMEM;
2957                 strcpy(n->num, phone->phone);
2958                 n->next = p->local->phone[phone->outgoing & 1];
2959                 p->local->phone[phone->outgoing & 1] = n;
2960                 return 0;
2961         }
2962         return -ENODEV;
2963 }
2964
2965 /*
2966  * Copy a string of all phone-numbers of an interface to user space.
2967  * This might sleep and must be called with the isdn semaphore down.
2968  */
2969 int
2970 isdn_net_getphones(isdn_net_ioctl_phone * phone, char __user *phones)
2971 {
2972         isdn_net_dev *p = isdn_net_findif(phone->name);
2973         int inout = phone->outgoing & 1;
2974         int more = 0;
2975         int count = 0;
2976         isdn_net_phone *n;
2977
2978         if (!p)
2979                 return -ENODEV;
2980         inout &= 1;
2981         for (n = p->local->phone[inout]; n; n = n->next) {
2982                 if (more) {
2983                         put_user(' ', phones++);
2984                         count++;
2985                 }
2986                 if (copy_to_user(phones, n->num, strlen(n->num) + 1)) {
2987                         return -EFAULT;
2988                 }
2989                 phones += strlen(n->num);
2990                 count += strlen(n->num);
2991                 more = 1;
2992         }
2993         put_user(0, phones);
2994         count++;
2995         return count;
2996 }
2997
2998 /*
2999  * Copy a string containing the peer's phone number of a connected interface
3000  * to user space.
3001  */
3002 int
3003 isdn_net_getpeer(isdn_net_ioctl_phone *phone, isdn_net_ioctl_phone __user *peer)
3004 {
3005         isdn_net_dev *p = isdn_net_findif(phone->name);
3006         int ch, dv, idx;
3007
3008         if (!p) return -ENODEV;
3009         /*
3010          * Theoretical race: while this executes, the remote number might
3011          * become invalid (hang up) or change (new connection), resulting
3012          * in (partially) wrong number copied to user. This race
3013          * currently ignored.
3014          */
3015         ch = p->local->isdn_channel;
3016         dv = p->local->isdn_device;
3017         if(ch<0 && dv<0) return -ENOTCONN;
3018         idx = isdn_dc2minor(dv, ch);
3019         if (idx<0) return -ENODEV;
3020         /* for pre-bound channels, we need this extra check */
3021         if ( strncmp(dev->num[idx],"???",3) == 0 ) return -ENOTCONN;
3022         strncpy(phone->phone,dev->num[idx],ISDN_MSNLEN);
3023         phone->outgoing=USG_OUTGOING(dev->usage[idx]);
3024         if ( copy_to_user(peer,phone,sizeof(*peer)) ) return -EFAULT;
3025         return 0;
3026 }
3027 /*
3028  * Delete a phone-number from an interface.
3029  */
3030 int
3031 isdn_net_delphone(isdn_net_ioctl_phone * phone)
3032 {
3033         isdn_net_dev *p = isdn_net_findif(phone->name);
3034         int inout = phone->outgoing & 1;
3035         isdn_net_phone *n;
3036         isdn_net_phone *m;
3037
3038         if (p) {
3039                 n = p->local->phone[inout];
3040                 m = NULL;
3041                 while (n) {
3042                         if (!strcmp(n->num, phone->phone)) {
3043                                 if (p->local->dial == n)
3044                                         p->local->dial = n->next;
3045                                 if (m)
3046                                         m->next = n->next;
3047                                 else
3048                                         p->local->phone[inout] = n->next;
3049                                 kfree(n);
3050                                 return 0;
3051                         }
3052                         m = n;
3053                         n = (isdn_net_phone *) n->next;
3054                 }
3055                 return -EINVAL;
3056         }
3057         return -ENODEV;
3058 }
3059
3060 /*
3061  * Delete all phone-numbers of an interface.
3062  */
3063 static int
3064 isdn_net_rmallphone(isdn_net_dev * p)
3065 {
3066         isdn_net_phone *n;
3067         isdn_net_phone *m;
3068         int i;
3069
3070         for (i = 0; i < 2; i++) {
3071                 n = p->local->phone[i];
3072                 while (n) {
3073                         m = n->next;
3074                         kfree(n);
3075                         n = m;
3076                 }
3077                 p->local->phone[i] = NULL;
3078         }
3079         p->local->dial = NULL;
3080         return 0;
3081 }
3082
3083 /*
3084  * Force a hangup of a network-interface.
3085  */
3086 int
3087 isdn_net_force_hangup(char *name)
3088 {
3089         isdn_net_dev *p = isdn_net_findif(name);
3090         struct net_device *q;
3091
3092         if (p) {
3093                 if (p->local->isdn_device < 0)
3094                         return 1;
3095                 q = p->local->slave;
3096                 /* If this interface has slaves, do a hangup for them also. */
3097                 while (q) {
3098                         isdn_net_hangup(q);
3099                         q = (((isdn_net_local *) q->priv)->slave);
3100                 }
3101                 isdn_net_hangup(&p->dev);
3102                 return 0;
3103         }
3104         return -ENODEV;
3105 }
3106
3107 /*
3108  * Helper-function for isdn_net_rm: Do the real work.
3109  */
3110 static int
3111 isdn_net_realrm(isdn_net_dev * p, isdn_net_dev * q)
3112 {
3113         u_long flags;
3114
3115         if (isdn_net_device_started(p)) {
3116                 return -EBUSY;
3117         }
3118 #ifdef CONFIG_ISDN_X25
3119         if( p -> cprot && p -> cprot -> pops )
3120                 p -> cprot -> pops -> proto_del ( p -> cprot );
3121 #endif
3122         /* Free all phone-entries */
3123         isdn_net_rmallphone(p);
3124         /* If interface is bound exclusive, free channel-usage */
3125         if (p->local->exclusive != -1)
3126                 isdn_unexclusive_channel(p->local->pre_device, p->local->pre_channel);
3127         if (p->local->master) {
3128                 /* It's a slave-device, so update master's slave-pointer if necessary */
3129                 if (((isdn_net_local *) (p->local->master->priv))->slave == &p->dev)
3130                         ((isdn_net_local *) (p->local->master->priv))->slave = p->local->slave;
3131         } else {
3132                 /* Unregister only if it's a master-device */
3133                 p->dev.hard_header_cache = p->local->org_hhc;
3134                 p->dev.header_cache_update = p->local->org_hcu;
3135                 unregister_netdev(&p->dev);
3136         }
3137         /* Unlink device from chain */
3138         spin_lock_irqsave(&dev->lock, flags);
3139         if (q)
3140                 q->next = p->next;
3141         else
3142                 dev->netdev = p->next;
3143         if (p->local->slave) {
3144                 /* If this interface has a slave, remove it also */
3145                 char *slavename = ((isdn_net_local *) (p->local->slave->priv))->name;
3146                 isdn_net_dev *n = dev->netdev;
3147                 q = NULL;
3148                 while (n) {
3149                         if (!strcmp(n->local->name, slavename)) {
3150                                 spin_unlock_irqrestore(&dev->lock, flags);
3151                                 isdn_net_realrm(n, q);
3152                                 spin_lock_irqsave(&dev->lock, flags);
3153                                 break;
3154                         }
3155                         q = n;
3156                         n = (isdn_net_dev *) n->next;
3157                 }
3158         }
3159         spin_unlock_irqrestore(&dev->lock, flags);
3160         /* If no more net-devices remain, disable auto-hangup timer */
3161         if (dev->netdev == NULL)
3162                 isdn_timer_ctrl(ISDN_TIMER_NETHANGUP, 0);
3163         kfree(p->local);
3164         kfree(p);
3165
3166         return 0;
3167 }
3168
3169 /*
3170  * Remove a single network-interface.
3171  */
3172 int
3173 isdn_net_rm(char *name)
3174 {
3175         u_long flags;
3176         isdn_net_dev *p;
3177         isdn_net_dev *q;
3178
3179         /* Search name in netdev-chain */
3180         spin_lock_irqsave(&dev->lock, flags);
3181         p = dev->netdev;
3182         q = NULL;
3183         while (p) {
3184                 if (!strcmp(p->local->name, name)) {
3185                         spin_unlock_irqrestore(&dev->lock, flags);
3186                         return (isdn_net_realrm(p, q));
3187                 }
3188                 q = p;
3189                 p = (isdn_net_dev *) p->next;
3190         }
3191         spin_unlock_irqrestore(&dev->lock, flags);
3192         /* If no more net-devices remain, disable auto-hangup timer */
3193         if (dev->netdev == NULL)
3194                 isdn_timer_ctrl(ISDN_TIMER_NETHANGUP, 0);
3195         return -ENODEV;
3196 }
3197
3198 /*
3199  * Remove all network-interfaces
3200  */
3201 int
3202 isdn_net_rmall(void)
3203 {
3204         u_long flags;
3205         int ret;
3206
3207         /* Walk through netdev-chain */
3208         spin_lock_irqsave(&dev->lock, flags);
3209         while (dev->netdev) {
3210                 if (!dev->netdev->local->master) {
3211                         /* Remove master-devices only, slaves get removed with their master */
3212                         spin_unlock_irqrestore(&dev->lock, flags);
3213                         if ((ret = isdn_net_realrm(dev->netdev, NULL))) {
3214                                 return ret;
3215                         }
3216                         spin_lock_irqsave(&dev->lock, flags);
3217                 }
3218         }
3219         dev->netdev = NULL;
3220         spin_unlock_irqrestore(&dev->lock, flags);
3221         return 0;
3222 }