net/atm/lec.c

   1 /*
   2  * lec.c: Lan Emulation driver
   3  *
   4  * Marko Kiiskila <mkiiskila@yahoo.com>
   5  */
   6
   7 #include <linux/kernel.h>
   8 #include <linux/bitops.h>
   9 #include <linux/capability.h>
  10
  11 /* We are ethernet device */
  12 #include <linux/if_ether.h>
  13 #include <linux/netdevice.h>
  14 #include <linux/etherdevice.h>
  15 #include <net/sock.h>
  16 #include <linux/skbuff.h>
  17 #include <linux/ip.h>
  18 #include <asm/byteorder.h>
  19 #include <asm/uaccess.h>
  20 #include <net/arp.h>
  21 #include <net/dst.h>
  22 #include <linux/proc_fs.h>
  23 #include <linux/spinlock.h>
  24 #include <linux/proc_fs.h>
  25 #include <linux/seq_file.h>
  26
  27 /* TokenRing if needed */
  28 #ifdef CONFIG_TR
  29 #include <linux/trdevice.h>
  30 #endif
  31
  32 /* And atm device */
  33 #include <linux/atmdev.h>
  34 #include <linux/atmlec.h>
  35
  36 /* Proxy LEC knows about bridging */
  37 #if defined(CONFIG_BRIDGE) || defined(CONFIG_BRIDGE_MODULE)
  38 #include <linux/if_bridge.h>
  39 #include "../bridge/br_private.h"
  40
  41 static unsigned char bridge_ula_lec[] = { 0x01, 0x80, 0xc2, 0x00, 0x00 };
  42 #endif
  43
  44 /* Modular too */
  45 #include <linux/module.h>
  46 #include <linux/init.h>
  47
  48 #include "lec.h"
  49 #include "lec_arpc.h"
  50 #include "resources.h"
  51
  52 #if 0
  53 #define DPRINTK printk
  54 #else
  55 #define DPRINTK(format,args...)
  56 #endif
  57
  58 #define DUMP_PACKETS 0          /*
  59                                  * 0 = None,
  60                                  * 1 = 30 first bytes
  61                                  * 2 = Whole packet
  62                                  */
  63
  64 #define LEC_UNRES_QUE_LEN 8     /*
  65                                  * number of tx packets to queue for a
  66                                  * single destination while waiting for SVC
  67                                  */
  68
  69 static int lec_open(struct net_device *dev);
  70 static int lec_start_xmit(struct sk_buff *skb, struct net_device *dev);
  71 static int lec_close(struct net_device *dev);
  72 static struct net_device_stats *lec_get_stats(struct net_device *dev);
  73 static void lec_init(struct net_device *dev);
  74 static struct lec_arp_table *lec_arp_find(struct lec_priv *priv,
  75                                           unsigned char *mac_addr);
  76 static int lec_arp_remove(struct lec_priv *priv,
  77                           struct lec_arp_table *to_remove);
  78 /* LANE2 functions */
  79 static void lane2_associate_ind(struct net_device *dev, u8 *mac_address,
  80                                 u8 *tlvs, u32 sizeoftlvs);
  81 static int lane2_resolve(struct net_device *dev, u8 *dst_mac, int force,
  82                          u8 **tlvs, u32 *sizeoftlvs);
  83 static int lane2_associate_req(struct net_device *dev, u8 *lan_dst,
  84                                u8 *tlvs, u32 sizeoftlvs);
  85
  86 static int lec_addr_delete(struct lec_priv *priv, unsigned char *atm_addr,
  87                            unsigned long permanent);
  88 static void lec_arp_check_empties(struct lec_priv *priv,
  89                                   struct atm_vcc *vcc, struct sk_buff *skb);
  90 static void lec_arp_destroy(struct lec_priv *priv);
  91 static void lec_arp_init(struct lec_priv *priv);
  92 static struct atm_vcc *lec_arp_resolve(struct lec_priv *priv,
  93                                        unsigned char *mac_to_find,
  94                                        int is_rdesc,
  95                                        struct lec_arp_table **ret_entry);
  96 static void lec_arp_update(struct lec_priv *priv, unsigned char *mac_addr,
  97                            unsigned char *atm_addr, unsigned long remoteflag,
  98                            unsigned int targetless_le_arp);
  99 static void lec_flush_complete(struct lec_priv *priv, unsigned long tran_id);
 100 static int lec_mcast_make(struct lec_priv *priv, struct atm_vcc *vcc);
 101 static void lec_set_flush_tran_id(struct lec_priv *priv,
 102                                   unsigned char *atm_addr,
 103                                   unsigned long tran_id);
 104 static void lec_vcc_added(struct lec_priv *priv, struct atmlec_ioc *ioc_data,
 105                           struct atm_vcc *vcc,
 106                           void (*old_push) (struct atm_vcc *vcc,
 107                                             struct sk_buff *skb));
 108 static void lec_vcc_close(struct lec_priv *priv, struct atm_vcc *vcc);
 109
 110 static struct lane2_ops lane2_ops = {
 111         lane2_resolve,          /* resolve,             spec 3.1.3 */
 112         lane2_associate_req,    /* associate_req,       spec 3.1.4 */
 113         NULL                    /* associate indicator, spec 3.1.5 */
 114 };
 115
 116 static unsigned char bus_mac[ETH_ALEN] = { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff };
 117
 118 /* Device structures */
 119 static struct net_device *dev_lec[MAX_LEC_ITF];
 120
 121 #if defined(CONFIG_BRIDGE) || defined(CONFIG_BRIDGE_MODULE)
 122 static void lec_handle_bridge(struct sk_buff *skb, struct net_device *dev)
 123 {
 124         struct ethhdr *eth;
 125         char *buff;
 126         struct lec_priv *priv;
 127
 128         /*
 129          * Check if this is a BPDU. If so, ask zeppelin to send
 130          * LE_TOPOLOGY_REQUEST with the same value of Topology Change bit
 131          * as the Config BPDU has
 132          */
 133         eth = (struct ethhdr *)skb->data;
 134         buff = skb->data + skb->dev->hard_header_len;
 135         if (*buff++ == 0x42 && *buff++ == 0x42 && *buff++ == 0x03) {
 136                 struct sock *sk;
 137                 struct sk_buff *skb2;
 138                 struct atmlec_msg *mesg;
 139
 140                 skb2 = alloc_skb(sizeof(struct atmlec_msg), GFP_ATOMIC);
 141                 if (skb2 == NULL)
 142                         return;
 143                 skb2->len = sizeof(struct atmlec_msg);
 144                 mesg = (struct atmlec_msg *)skb2->data;
 145                 mesg->type = l_topology_change;
 146                 buff += 4;
 147                 mesg->content.normal.flag = *buff & 0x01;       /* 0x01 is topology change */
 148
 149                 priv = (struct lec_priv *)dev->priv;
 150                 atm_force_charge(priv->lecd, skb2->truesize);
 151                 sk = sk_atm(priv->lecd);
 152                 skb_queue_tail(&sk->sk_receive_queue, skb2);
 153                 sk->sk_data_ready(sk, skb2->len);
 154         }
 155
 156         return;
 157 }
 158 #endif /* defined(CONFIG_BRIDGE) || defined(CONFIG_BRIDGE_MODULE) */
 159
 160 /*
 161  * Modelled after tr_type_trans
 162  * All multicast and ARE or STE frames go to BUS.
 163  * Non source routed frames go by destination address.
 164  * Last hop source routed frames go by destination address.
 165  * Not last hop source routed frames go by _next_ route descriptor.
 166  * Returns pointer to destination MAC address or fills in rdesc
 167  * and returns NULL.
 168  */
 169 #ifdef CONFIG_TR
 170 static unsigned char *get_tr_dst(unsigned char *packet, unsigned char *rdesc)
 171 {
 172         struct trh_hdr *trh;
 173         int riflen, num_rdsc;
 174
 175         trh = (struct trh_hdr *)packet;
 176         if (trh->daddr[0] & (uint8_t) 0x80)
 177                 return bus_mac; /* multicast */
 178
 179         if (trh->saddr[0] & TR_RII) {
 180                 riflen = (ntohs(trh->rcf) & TR_RCF_LEN_MASK) >> 8;
 181                 if ((ntohs(trh->rcf) >> 13) != 0)
 182                         return bus_mac; /* ARE or STE */
 183         } else
 184                 return trh->daddr;      /* not source routed */
 185
 186         if (riflen < 6)
 187                 return trh->daddr;      /* last hop, source routed */
 188
 189         /* riflen is 6 or more, packet has more than one route descriptor */
 190         num_rdsc = (riflen / 2) - 1;
 191         memset(rdesc, 0, ETH_ALEN);
 192         /* offset 4 comes from LAN destination field in LE control frames */
 193         if (trh->rcf & htons((uint16_t) TR_RCF_DIR_BIT))
 194                 memcpy(&rdesc[4], &trh->rseg[num_rdsc - 2], sizeof(uint16_t));
 195         else {
 196                 memcpy(&rdesc[4], &trh->rseg[1], sizeof(uint16_t));
 197                 rdesc[5] = ((ntohs(trh->rseg[0]) & 0x000f) | (rdesc[5] & 0xf0));
 198         }
 199
 200         return NULL;
 201 }
 202 #endif /* CONFIG_TR */
 203
 204 /*
 205  * Open/initialize the netdevice. This is called (in the current kernel)
 206  * sometime after booting when the 'ifconfig' program is run.
 207  *
 208  * This routine should set everything up anew at each open, even
 209  * registers that "should" only need to be set once at boot, so that
 210  * there is non-reboot way to recover if something goes wrong.
 211  */
 212
 213 static int lec_open(struct net_device *dev)
 214 {
 215         struct lec_priv *priv = (struct lec_priv *)dev->priv;
 216
 217         netif_start_queue(dev);
 218         memset(&priv->stats, 0, sizeof(struct net_device_stats));
 219
 220         return 0;
 221 }
 222
 223 static __inline__ void
 224 lec_send(struct atm_vcc *vcc, struct sk_buff *skb, struct lec_priv *priv)
 225 {
 226         ATM_SKB(skb)->vcc = vcc;
 227         ATM_SKB(skb)->atm_options = vcc->atm_options;
 228
 229         atomic_add(skb->truesize, &sk_atm(vcc)->sk_wmem_alloc);
 230         if (vcc->send(vcc, skb) < 0) {
 231                 priv->stats.tx_dropped++;
 232                 return;
 233         }
 234
 235         priv->stats.tx_packets++;
 236         priv->stats.tx_bytes += skb->len;
 237 }
 238
 239 static void lec_tx_timeout(struct net_device *dev)
 240 {
 241         printk(KERN_INFO "%s: tx timeout\n", dev->name);
 242         dev->trans_start = jiffies;
 243         netif_wake_queue(dev);
 244 }
 245
 246 static int lec_start_xmit(struct sk_buff *skb, struct net_device *dev)
 247 {
 248         struct sk_buff *skb2;
 249         struct lec_priv *priv = (struct lec_priv *)dev->priv;
 250         struct lecdatahdr_8023 *lec_h;
 251         struct atm_vcc *vcc;
 252         struct lec_arp_table *entry;
 253         unsigned char *dst;
 254         int min_frame_size;
 255 #ifdef CONFIG_TR
 256         unsigned char rdesc[ETH_ALEN];  /* Token Ring route descriptor */
 257 #endif
 258         int is_rdesc;
 259 #if DUMP_PACKETS > 0
 260         char buf[300];
 261         int i = 0;
 262 #endif /* DUMP_PACKETS >0 */
 263
 264         DPRINTK("lec_start_xmit called\n");
 265         if (!priv->lecd) {
 266                 printk("%s:No lecd attached\n", dev->name);
 267                 priv->stats.tx_errors++;
 268                 netif_stop_queue(dev);
 269                 return -EUNATCH;
 270         }
 271
 272         DPRINTK("skbuff head:%lx data:%lx tail:%lx end:%lx\n",
 273                 (long)skb->head, (long)skb->data, (long)skb->tail,
 274                 (long)skb->end);
 275 #if defined(CONFIG_BRIDGE) || defined(CONFIG_BRIDGE_MODULE)
 276         if (memcmp(skb->data, bridge_ula_lec, sizeof(bridge_ula_lec)) == 0)
 277                 lec_handle_bridge(skb, dev);
 278 #endif
 279
 280         /* Make sure we have room for lec_id */
 281         if (skb_headroom(skb) < 2) {
 282
 283                 DPRINTK("lec_start_xmit: reallocating skb\n");
 284                 skb2 = skb_realloc_headroom(skb, LEC_HEADER_LEN);
 285                 kfree_skb(skb);
 286                 if (skb2 == NULL)
 287                         return 0;
 288                 skb = skb2;
 289         }
 290         skb_push(skb, 2);
 291
 292         /* Put le header to place, works for TokenRing too */
 293         lec_h = (struct lecdatahdr_8023 *)skb->data;
 294         lec_h->le_header = htons(priv->lecid);
 295
 296 #ifdef CONFIG_TR
 297         /*
 298          * Ugly. Use this to realign Token Ring packets for
 299          * e.g. PCA-200E driver.
 300          */
 301         if (priv->is_trdev) {
 302                 skb2 = skb_realloc_headroom(skb, LEC_HEADER_LEN);
 303                 kfree_skb(skb);
 304                 if (skb2 == NULL)
 305                         return 0;
 306                 skb = skb2;
 307         }
 308 #endif
 309
 310 #if DUMP_PACKETS > 0
 311         printk("%s: send datalen:%ld lecid:%4.4x\n", dev->name,
 312                skb->len, priv->lecid);
 313 #if DUMP_PACKETS >= 2
 314         for (i = 0; i < skb->len && i < 99; i++) {
 315                 sprintf(buf + i * 3, "%2.2x ", 0xff & skb->data[i]);
 316         }
 317 #elif DUMP_PACKETS >= 1
 318         for (i = 0; i < skb->len && i < 30; i++) {
 319                 sprintf(buf + i * 3, "%2.2x ", 0xff & skb->data[i]);
 320         }
 321 #endif /* DUMP_PACKETS >= 1 */
 322         if (i == skb->len)
 323                 printk("%s\n", buf);
 324         else
 325                 printk("%s...\n", buf);
 326 #endif /* DUMP_PACKETS > 0 */
 327
 328         /* Minimum ethernet-frame size */
 329 #ifdef CONFIG_TR
 330         if (priv->is_trdev)
 331                 min_frame_size = LEC_MINIMUM_8025_SIZE;
 332         else
 333 #endif
 334                 min_frame_size = LEC_MINIMUM_8023_SIZE;
 335         if (skb->len < min_frame_size) {
 336                 if ((skb->len + skb_tailroom(skb)) < min_frame_size) {
 337                         skb2 = skb_copy_expand(skb, 0,
 338                                                min_frame_size - skb->truesize,
 339                                                GFP_ATOMIC);
 340                         dev_kfree_skb(skb);
 341                         if (skb2 == NULL) {
 342                                 priv->stats.tx_dropped++;
 343                                 return 0;
 344                         }
 345                         skb = skb2;
 346                 }
 347                 skb_put(skb, min_frame_size - skb->len);
 348         }
 349
 350         /* Send to right vcc */
 351         is_rdesc = 0;
 352         dst = lec_h->h_dest;
 353 #ifdef CONFIG_TR
 354         if (priv->is_trdev) {
 355                 dst = get_tr_dst(skb->data + 2, rdesc);
 356                 if (dst == NULL) {
 357                         dst = rdesc;
 358                         is_rdesc = 1;
 359                 }
 360         }
 361 #endif
 362         entry = NULL;
 363         vcc = lec_arp_resolve(priv, dst, is_rdesc, &entry);
 364         DPRINTK("%s:vcc:%p vcc_flags:%x, entry:%p\n", dev->name,
 365                 vcc, vcc ? vcc->flags : 0, entry);
 366         if (!vcc || !test_bit(ATM_VF_READY, &vcc->flags)) {
 367                 if (entry && (entry->tx_wait.qlen < LEC_UNRES_QUE_LEN)) {
 368                         DPRINTK("%s:lec_start_xmit: queuing packet, ",
 369                                 dev->name);
 370                         DPRINTK("MAC address 0x%02x:%02x:%02x:%02x:%02x:%02x\n",
 371                                 lec_h->h_dest[0], lec_h->h_dest[1],
 372                                 lec_h->h_dest[2], lec_h->h_dest[3],
 373                                 lec_h->h_dest[4], lec_h->h_dest[5]);
 374                         skb_queue_tail(&entry->tx_wait, skb);
 375                 } else {
 376                         DPRINTK
 377                             ("%s:lec_start_xmit: tx queue full or no arp entry, dropping, ",
 378                              dev->name);
 379                         DPRINTK("MAC address 0x%02x:%02x:%02x:%02x:%02x:%02x\n",
 380                                 lec_h->h_dest[0], lec_h->h_dest[1],
 381                                 lec_h->h_dest[2], lec_h->h_dest[3],
 382                                 lec_h->h_dest[4], lec_h->h_dest[5]);
 383                         priv->stats.tx_dropped++;
 384                         dev_kfree_skb(skb);
 385                 }
 386                 return 0;
 387         }
 388 #if DUMP_PACKETS > 0
 389         printk("%s:sending to vpi:%d vci:%d\n", dev->name, vcc->vpi, vcc->vci);
 390 #endif /* DUMP_PACKETS > 0 */
 391
 392         while (entry && (skb2 = skb_dequeue(&entry->tx_wait))) {
 393                 DPRINTK("lec.c: emptying tx queue, ");
 394                 DPRINTK("MAC address 0x%02x:%02x:%02x:%02x:%02x:%02x\n",
 395                         lec_h->h_dest[0], lec_h->h_dest[1], lec_h->h_dest[2],
 396                         lec_h->h_dest[3], lec_h->h_dest[4], lec_h->h_dest[5]);
 397                 lec_send(vcc, skb2, priv);
 398         }
 399
 400         lec_send(vcc, skb, priv);
 401
 402         if (!atm_may_send(vcc, 0)) {
 403                 struct lec_vcc_priv *vpriv = LEC_VCC_PRIV(vcc);
 404
 405                 vpriv->xoff = 1;
 406                 netif_stop_queue(dev);
 407
 408                 /*
 409                  * vcc->pop() might have occurred in between, making
 410                  * the vcc usuable again.  Since xmit is serialized,
 411                  * this is the only situation we have to re-test.
 412                  */
 413
 414                 if (atm_may_send(vcc, 0))
 415                         netif_wake_queue(dev);
 416         }
 417
 418         dev->trans_start = jiffies;
 419         return 0;
 420 }
 421
 422 /* The inverse routine to net_open(). */
 423 static int lec_close(struct net_device *dev)
 424 {
 425         netif_stop_queue(dev);
 426         return 0;
 427 }
 428
 429 /*
 430  * Get the current statistics.
 431  * This may be called with the card open or closed.
 432  */
 433 static struct net_device_stats *lec_get_stats(struct net_device *dev)
 434 {
 435         return &((struct lec_priv *)dev->priv)->stats;
 436 }
 437
 438 static int lec_atm_send(struct atm_vcc *vcc, struct sk_buff *skb)
 439 {
 440         unsigned long flags;
 441         struct net_device *dev = (struct net_device *)vcc->proto_data;
 442         struct lec_priv *priv = (struct lec_priv *)dev->priv;
 443         struct atmlec_msg *mesg;
 444         struct lec_arp_table *entry;
 445         int i;
 446         char *tmp;              /* FIXME */
 447
 448         atomic_sub(skb->truesize, &sk_atm(vcc)->sk_wmem_alloc);
 449         mesg = (struct atmlec_msg *)skb->data;
 450         tmp = skb->data;
 451         tmp += sizeof(struct atmlec_msg);
 452         DPRINTK("%s: msg from zeppelin:%d\n", dev->name, mesg->type);
 453         switch (mesg->type) {
 454         case l_set_mac_addr:
 455                 for (i = 0; i < 6; i++) {
 456                         dev->dev_addr[i] = mesg->content.normal.mac_addr[i];
 457                 }
 458                 break;
 459         case l_del_mac_addr:
 460                 for (i = 0; i < 6; i++) {
 461                         dev->dev_addr[i] = 0;
 462                 }
 463                 break;
 464         case l_addr_delete:
 465                 lec_addr_delete(priv, mesg->content.normal.atm_addr,
 466                                 mesg->content.normal.flag);
 467                 break;
 468         case l_topology_change:
 469                 priv->topology_change = mesg->content.normal.flag;
 470                 break;
 471         case l_flush_complete:
 472                 lec_flush_complete(priv, mesg->content.normal.flag);
 473                 break;
 474         case l_narp_req:        /* LANE2: see 7.1.35 in the lane2 spec */
 475                 spin_lock_irqsave(&priv->lec_arp_lock, flags);
 476                 entry = lec_arp_find(priv, mesg->content.normal.mac_addr);
 477                 lec_arp_remove(priv, entry);
 478                 spin_unlock_irqrestore(&priv->lec_arp_lock, flags);
 479
 480                 if (mesg->content.normal.no_source_le_narp)
 481                         break;
 482                 /* FALL THROUGH */
 483         case l_arp_update:
 484                 lec_arp_update(priv, mesg->content.normal.mac_addr,
 485                                mesg->content.normal.atm_addr,
 486                                mesg->content.normal.flag,
 487                                mesg->content.normal.targetless_le_arp);
 488                 DPRINTK("lec: in l_arp_update\n");
 489                 if (mesg->sizeoftlvs != 0) {    /* LANE2 3.1.5 */
 490                         DPRINTK("lec: LANE2 3.1.5, got tlvs, size %d\n",
 491                                 mesg->sizeoftlvs);
 492                         lane2_associate_ind(dev, mesg->content.normal.mac_addr,
 493                                             tmp, mesg->sizeoftlvs);
 494                 }
 495                 break;
 496         case l_config:
 497                 priv->maximum_unknown_frame_count =
 498                     mesg->content.config.maximum_unknown_frame_count;
 499                 priv->max_unknown_frame_time =
 500                     (mesg->content.config.max_unknown_frame_time * HZ);
 501                 priv->max_retry_count = mesg->content.config.max_retry_count;
 502                 priv->aging_time = (mesg->content.config.aging_time * HZ);
 503                 priv->forward_delay_time =
 504                     (mesg->content.config.forward_delay_time * HZ);
 505                 priv->arp_response_time =
 506                     (mesg->content.config.arp_response_time * HZ);
 507                 priv->flush_timeout = (mesg->content.config.flush_timeout * HZ);
 508                 priv->path_switching_delay =
 509                     (mesg->content.config.path_switching_delay * HZ);
 510                 priv->lane_version = mesg->content.config.lane_version; /* LANE2 */
 511                 priv->lane2_ops = NULL;
 512                 if (priv->lane_version > 1)
 513                         priv->lane2_ops = &lane2_ops;
 514                 if (dev->change_mtu(dev, mesg->content.config.mtu))
 515                         printk("%s: change_mtu to %d failed\n", dev->name,
 516                                mesg->content.config.mtu);
 517                 priv->is_proxy = mesg->content.config.is_proxy;
 518                 break;
 519         case l_flush_tran_id:
 520                 lec_set_flush_tran_id(priv, mesg->content.normal.atm_addr,
 521                                       mesg->content.normal.flag);
 522                 break;
 523         case l_set_lecid:
 524                 priv->lecid =
 525                     (unsigned short)(0xffff & mesg->content.normal.flag);
 526                 break;
 527         case l_should_bridge:
 528 #if defined(CONFIG_BRIDGE) || defined(CONFIG_BRIDGE_MODULE)
 529                 {
 530                         struct net_bridge_fdb_entry *f;
 531
 532                         DPRINTK
 533                             ("%s: bridge zeppelin asks about 0x%02x:%02x:%02x:%02x:%02x:%02x\n",
 534                              dev->name, mesg->content.proxy.mac_addr[0],
 535                              mesg->content.proxy.mac_addr[1],
 536                              mesg->content.proxy.mac_addr[2],
 537                              mesg->content.proxy.mac_addr[3],
 538                              mesg->content.proxy.mac_addr[4],
 539                              mesg->content.proxy.mac_addr[5]);
 540
 541                         if (br_fdb_get_hook == NULL || dev->br_port == NULL)
 542                                 break;
 543
 544                         f = br_fdb_get_hook(dev->br_port->br,
 545                                             mesg->content.proxy.mac_addr);
 546                         if (f != NULL && f->dst->dev != dev
 547                             && f->dst->state == BR_STATE_FORWARDING) {
 548                                 /* hit from bridge table, send LE_ARP_RESPONSE */
 549                                 struct sk_buff *skb2;
 550                                 struct sock *sk;
 551
 552                                 DPRINTK
 553                                     ("%s: entry found, responding to zeppelin\n",
 554                                      dev->name);
 555                                 skb2 =
 556                                     alloc_skb(sizeof(struct atmlec_msg),
 557                                               GFP_ATOMIC);
 558                                 if (skb2 == NULL) {
 559                                         br_fdb_put_hook(f);
 560                                         break;
 561                                 }
 562                                 skb2->len = sizeof(struct atmlec_msg);
 563                                 memcpy(skb2->data, mesg,
 564                                        sizeof(struct atmlec_msg));
 565                                 atm_force_charge(priv->lecd, skb2->truesize);
 566                                 sk = sk_atm(priv->lecd);
 567                                 skb_queue_tail(&sk->sk_receive_queue, skb2);
 568                                 sk->sk_data_ready(sk, skb2->len);
 569                         }
 570                         if (f != NULL)
 571                                 br_fdb_put_hook(f);
 572                 }
 573 #endif /* defined(CONFIG_BRIDGE) || defined(CONFIG_BRIDGE_MODULE) */
 574                 break;
 575         default:
 576                 printk("%s: Unknown message type %d\n", dev->name, mesg->type);
 577                 dev_kfree_skb(skb);
 578                 return -EINVAL;
 579         }
 580         dev_kfree_skb(skb);
 581         return 0;
 582 }
 583
 584 static void lec_atm_close(struct atm_vcc *vcc)
 585 {
 586         struct sk_buff *skb;
 587         struct net_device *dev = (struct net_device *)vcc->proto_data;
 588         struct lec_priv *priv = (struct lec_priv *)dev->priv;
 589
 590         priv->lecd = NULL;
 591         /* Do something needful? */
 592
 593         netif_stop_queue(dev);
 594         lec_arp_destroy(priv);
 595
 596         if (skb_peek(&sk_atm(vcc)->sk_receive_queue))
 597                 printk("%s lec_atm_close: closing with messages pending\n",
 598                        dev->name);
 599         while ((skb = skb_dequeue(&sk_atm(vcc)->sk_receive_queue)) != NULL) {
 600                 atm_return(vcc, skb->truesize);
 601                 dev_kfree_skb(skb);
 602         }
 603
 604         printk("%s: Shut down!\n", dev->name);
 605         module_put(THIS_MODULE);
 606 }
 607
 608 static struct atmdev_ops lecdev_ops = {
 609         .close = lec_atm_close,
 610         .send = lec_atm_send
 611 };
 612
 613 static struct atm_dev lecatm_dev = {
 614         .ops = &lecdev_ops,
 615         .type = "lec",
 616         .number = 999,          /* dummy device number */
 617         .lock = SPIN_LOCK_UNLOCKED
 618 };
 619
 620 /*
 621  * LANE2: new argument struct sk_buff *data contains
 622  * the LE_ARP based TLVs introduced in the LANE2 spec
 623  */
 624 static int
 625 send_to_lecd(struct lec_priv *priv, atmlec_msg_type type,
 626              unsigned char *mac_addr, unsigned char *atm_addr,
 627              struct sk_buff *data)
 628 {
 629         struct sock *sk;
 630         struct sk_buff *skb;
 631         struct atmlec_msg *mesg;
 632
 633         if (!priv || !priv->lecd) {
 634                 return -1;
 635         }
 636         skb = alloc_skb(sizeof(struct atmlec_msg), GFP_ATOMIC);
 637         if (!skb)
 638                 return -1;
 639         skb->len = sizeof(struct atmlec_msg);
 640         mesg = (struct atmlec_msg *)skb->data;
 641         memset(mesg, 0, sizeof(struct atmlec_msg));
 642         mesg->type = type;
 643         if (data != NULL)
 644                 mesg->sizeoftlvs = data->len;
 645         if (mac_addr)
 646                 memcpy(&mesg->content.normal.mac_addr, mac_addr, ETH_ALEN);
 647         else
 648                 mesg->content.normal.targetless_le_arp = 1;
 649         if (atm_addr)
 650                 memcpy(&mesg->content.normal.atm_addr, atm_addr, ATM_ESA_LEN);
 651
 652         atm_force_charge(priv->lecd, skb->truesize);
 653         sk = sk_atm(priv->lecd);
 654         skb_queue_tail(&sk->sk_receive_queue, skb);
 655         sk->sk_data_ready(sk, skb->len);
 656
 657         if (data != NULL) {
 658                 DPRINTK("lec: about to send %d bytes of data\n", data->len);
 659                 atm_force_charge(priv->lecd, data->truesize);
 660                 skb_queue_tail(&sk->sk_receive_queue, data);
 661                 sk->sk_data_ready(sk, skb->len);
 662         }
 663
 664         return 0;
 665 }
 666
 667 /* shamelessly stolen from drivers/net/net_init.c */
 668 static int lec_change_mtu(struct net_device *dev, int new_mtu)
 669 {
 670         if ((new_mtu < 68) || (new_mtu > 18190))
 671                 return -EINVAL;
 672         dev->mtu = new_mtu;
 673         return 0;
 674 }
 675
 676 static void lec_set_multicast_list(struct net_device *dev)
 677 {
 678         /*
 679          * by default, all multicast frames arrive over the bus.
 680          * eventually support selective multicast service
 681          */
 682         return;
 683 }
 684
 685 static void lec_init(struct net_device *dev)
 686 {
 687         dev->change_mtu = lec_change_mtu;
 688         dev->open = lec_open;
 689         dev->stop = lec_close;
 690         dev->hard_start_xmit = lec_start_xmit;
 691         dev->tx_timeout = lec_tx_timeout;
 692
 693         dev->get_stats = lec_get_stats;
 694         dev->set_multicast_list = lec_set_multicast_list;
 695         dev->do_ioctl = NULL;
 696         printk("%s: Initialized!\n", dev->name);
 697         return;
 698 }
 699
 700 static unsigned char lec_ctrl_magic[] = {
 701         0xff,
 702         0x00,
 703         0x01,
 704         0x01
 705 };
 706
 707 #define LEC_DATA_DIRECT_8023  2
 708 #define LEC_DATA_DIRECT_8025  3
 709
 710 static int lec_is_data_direct(struct atm_vcc *vcc)
 711 {
 712         return ((vcc->sap.blli[0].l3.tr9577.snap[4] == LEC_DATA_DIRECT_8023) ||
 713                 (vcc->sap.blli[0].l3.tr9577.snap[4] == LEC_DATA_DIRECT_8025));
 714 }
 715
 716 static void lec_push(struct atm_vcc *vcc, struct sk_buff *skb)
 717 {
 718         unsigned long flags;
 719         struct net_device *dev = (struct net_device *)vcc->proto_data;
 720         struct lec_priv *priv = (struct lec_priv *)dev->priv;
 721
 722 #if DUMP_PACKETS >0
 723         int i = 0;
 724         char buf[300];
 725
 726         printk("%s: lec_push vcc vpi:%d vci:%d\n", dev->name,
 727                vcc->vpi, vcc->vci);
 728 #endif
 729         if (!skb) {
 730                 DPRINTK("%s: null skb\n", dev->name);
 731                 lec_vcc_close(priv, vcc);
 732                 return;
 733         }
 734 #if DUMP_PACKETS > 0
 735         printk("%s: rcv datalen:%ld lecid:%4.4x\n", dev->name,
 736                skb->len, priv->lecid);
 737 #if DUMP_PACKETS >= 2
 738         for (i = 0; i < skb->len && i < 99; i++) {
 739                 sprintf(buf + i * 3, "%2.2x ", 0xff & skb->data[i]);
 740         }
 741 #elif DUMP_PACKETS >= 1
 742         for (i = 0; i < skb->len && i < 30; i++) {
 743                 sprintf(buf + i * 3, "%2.2x ", 0xff & skb->data[i]);
 744         }
 745 #endif /* DUMP_PACKETS >= 1 */
 746         if (i == skb->len)
 747                 printk("%s\n", buf);
 748         else
 749                 printk("%s...\n", buf);
 750 #endif /* DUMP_PACKETS > 0 */
 751         if (memcmp(skb->data, lec_ctrl_magic, 4) == 0) {        /* Control frame, to daemon */
 752                 struct sock *sk = sk_atm(vcc);
 753
 754                 DPRINTK("%s: To daemon\n", dev->name);
 755                 skb_queue_tail(&sk->sk_receive_queue, skb);
 756                 sk->sk_data_ready(sk, skb->len);
 757         } else {                /* Data frame, queue to protocol handlers */
 758                 struct lec_arp_table *entry;
 759                 unsigned char *src, *dst;
 760
 761                 atm_return(vcc, skb->truesize);
 762                 if (*(uint16_t *) skb->data == htons(priv->lecid) ||
 763                     !priv->lecd || !(dev->flags & IFF_UP)) {
 764                         /*
 765                          * Probably looping back, or if lecd is missing,
 766                          * lecd has gone down
 767                          */
 768                         DPRINTK("Ignoring frame...\n");
 769                         dev_kfree_skb(skb);
 770                         return;
 771                 }
 772 #ifdef CONFIG_TR
 773                 if (priv->is_trdev)
 774                         dst = ((struct lecdatahdr_8025 *)skb->data)->h_dest;
 775                 else
 776 #endif
 777                         dst = ((struct lecdatahdr_8023 *)skb->data)->h_dest;
 778
 779                 /*
 780                  * If this is a Data Direct VCC, and the VCC does not match
 781                  * the LE_ARP cache entry, delete the LE_ARP cache entry.
 782                  */
 783                 spin_lock_irqsave(&priv->lec_arp_lock, flags);
 784                 if (lec_is_data_direct(vcc)) {
 785 #ifdef CONFIG_TR
 786                         if (priv->is_trdev)
 787                                 src =
 788                                     ((struct lecdatahdr_8025 *)skb->data)->
 789                                     h_source;
 790                         else
 791 #endif
 792                                 src =
 793                                     ((struct lecdatahdr_8023 *)skb->data)->
 794                                     h_source;
 795                         entry = lec_arp_find(priv, src);
 796                         if (entry && entry->vcc != vcc) {
 797                                 lec_arp_remove(priv, entry);
 798                                 kfree(entry);
 799                         }
 800                 }
 801                 spin_unlock_irqrestore(&priv->lec_arp_lock, flags);
 802
 803                 if (!(dst[0] & 0x01) && /* Never filter Multi/Broadcast */
 804                     !priv->is_proxy &&  /* Proxy wants all the packets */
 805                     memcmp(dst, dev->dev_addr, dev->addr_len)) {
 806                         dev_kfree_skb(skb);
 807                         return;
 808                 }
 809                 if (priv->lec_arp_empty_ones) {
 810                         lec_arp_check_empties(priv, vcc, skb);
 811                 }
 812                 skb->dev = dev;
 813                 skb_pull(skb, 2);       /* skip lec_id */
 814 #ifdef CONFIG_TR
 815                 if (priv->is_trdev)
 816                         skb->protocol = tr_type_trans(skb, dev);
 817                 else
 818 #endif
 819                         skb->protocol = eth_type_trans(skb, dev);
 820                 priv->stats.rx_packets++;
 821                 priv->stats.rx_bytes += skb->len;
 822                 memset(ATM_SKB(skb), 0, sizeof(struct atm_skb_data));
 823                 netif_rx(skb);
 824         }
 825 }
 826
 827 static void lec_pop(struct atm_vcc *vcc, struct sk_buff *skb)
 828 {
 829         struct lec_vcc_priv *vpriv = LEC_VCC_PRIV(vcc);
 830         struct net_device *dev = skb->dev;
 831
 832         if (vpriv == NULL) {
 833                 printk("lec_pop(): vpriv = NULL!?!?!?\n");
 834                 return;
 835         }
 836
 837         vpriv->old_pop(vcc, skb);
 838
 839         if (vpriv->xoff && atm_may_send(vcc, 0)) {
 840                 vpriv->xoff = 0;
 841                 if (netif_running(dev) && netif_queue_stopped(dev))
 842                         netif_wake_queue(dev);
 843         }
 844 }
 845
 846 static int lec_vcc_attach(struct atm_vcc *vcc, void __user *arg)
 847 {
 848         struct lec_vcc_priv *vpriv;
 849         int bytes_left;
 850         struct atmlec_ioc ioc_data;
 851
 852         /* Lecd must be up in this case */
 853         bytes_left = copy_from_user(&ioc_data, arg, sizeof(struct atmlec_ioc));
 854         if (bytes_left != 0) {
 855                 printk
 856                     ("lec: lec_vcc_attach, copy from user failed for %d bytes\n",
 857                      bytes_left);
 858         }
 859         if (ioc_data.dev_num < 0 || ioc_data.dev_num >= MAX_LEC_ITF ||
 860             !dev_lec[ioc_data.dev_num])
 861                 return -EINVAL;
 862         if (!(vpriv = kmalloc(sizeof(struct lec_vcc_priv), GFP_KERNEL)))
 863                 return -ENOMEM;
 864         vpriv->xoff = 0;
 865         vpriv->old_pop = vcc->pop;
 866         vcc->user_back = vpriv;
 867         vcc->pop = lec_pop;
 868         lec_vcc_added(dev_lec[ioc_data.dev_num]->priv,
 869                       &ioc_data, vcc, vcc->push);
 870         vcc->proto_data = dev_lec[ioc_data.dev_num];
 871         vcc->push = lec_push;
 872         return 0;
 873 }
 874
 875 static int lec_mcast_attach(struct atm_vcc *vcc, int arg)
 876 {
 877         if (arg < 0 || arg >= MAX_LEC_ITF || !dev_lec[arg])
 878                 return -EINVAL;
 879         vcc->proto_data = dev_lec[arg];
 880         return (lec_mcast_make((struct lec_priv *)dev_lec[arg]->priv, vcc));
 881 }
 882
 883 /* Initialize device. */
 884 static int lecd_attach(struct atm_vcc *vcc, int arg)
 885 {
 886         int i;
 887         struct lec_priv *priv;
 888
 889         if (arg < 0)
 890                 i = 0;
 891         else
 892                 i = arg;
 893 #ifdef CONFIG_TR
 894         if (arg >= MAX_LEC_ITF)
 895                 return -EINVAL;
 896 #else                           /* Reserve the top NUM_TR_DEVS for TR */
 897         if (arg >= (MAX_LEC_ITF - NUM_TR_DEVS))
 898                 return -EINVAL;
 899 #endif
 900         if (!dev_lec[i]) {
 901                 int is_trdev, size;
 902
 903                 is_trdev = 0;
 904                 if (i >= (MAX_LEC_ITF - NUM_TR_DEVS))
 905                         is_trdev = 1;
 906
 907                 size = sizeof(struct lec_priv);
 908 #ifdef CONFIG_TR
 909                 if (is_trdev)
 910                         dev_lec[i] = alloc_trdev(size);
 911                 else
 912 #endif
 913                         dev_lec[i] = alloc_etherdev(size);
 914                 if (!dev_lec[i])
 915                         return -ENOMEM;
 916                 snprintf(dev_lec[i]->name, IFNAMSIZ, "lec%d", i);
 917                 if (register_netdev(dev_lec[i])) {
 918                         free_netdev(dev_lec[i]);
 919                         return -EINVAL;
 920                 }
 921
 922                 priv = dev_lec[i]->priv;
 923                 priv->is_trdev = is_trdev;
 924                 lec_init(dev_lec[i]);
 925         } else {
 926                 priv = dev_lec[i]->priv;
 927                 if (priv->lecd)
 928                         return -EADDRINUSE;
 929         }
 930         lec_arp_init(priv);
 931         priv->itfnum = i;       /* LANE2 addition */
 932         priv->lecd = vcc;
 933         vcc->dev = &lecatm_dev;
 934         vcc_insert_socket(sk_atm(vcc));
 935
 936         vcc->proto_data = dev_lec[i];
 937         set_bit(ATM_VF_META, &vcc->flags);
 938         set_bit(ATM_VF_READY, &vcc->flags);
 939
 940         /* Set default values to these variables */
 941         priv->maximum_unknown_frame_count = 1;
 942         priv->max_unknown_frame_time = (1 * HZ);
 943         priv->vcc_timeout_period = (1200 * HZ);
 944         priv->max_retry_count = 1;
 945         priv->aging_time = (300 * HZ);
 946         priv->forward_delay_time = (15 * HZ);
 947         priv->topology_change = 0;
 948         priv->arp_response_time = (1 * HZ);
 949         priv->flush_timeout = (4 * HZ);
 950         priv->path_switching_delay = (6 * HZ);
 951
 952         if (dev_lec[i]->flags & IFF_UP) {
 953                 netif_start_queue(dev_lec[i]);
 954         }
 955         __module_get(THIS_MODULE);
 956         return i;
 957 }
 958
 959 #ifdef CONFIG_PROC_FS
 960 static char *lec_arp_get_status_string(unsigned char status)
 961 {
 962         static char *lec_arp_status_string[] = {
 963                 "ESI_UNKNOWN       ",
 964                 "ESI_ARP_PENDING   ",
 965                 "ESI_VC_PENDING    ",
 966                 "<Undefined>       ",
 967                 "ESI_FLUSH_PENDING ",
 968                 "ESI_FORWARD_DIRECT"
 969         };
 970
 971         if (status > ESI_FORWARD_DIRECT)
 972                 status = 3;     /* ESI_UNDEFINED */
 973         return lec_arp_status_string[status];
 974 }
 975
 976 static void lec_info(struct seq_file *seq, struct lec_arp_table *entry)
 977 {
 978         int i;
 979
 980         for (i = 0; i < ETH_ALEN; i++)
 981                 seq_printf(seq, "%2.2x", entry->mac_addr[i] & 0xff);
 982         seq_printf(seq, " ");
 983         for (i = 0; i < ATM_ESA_LEN; i++)
 984                 seq_printf(seq, "%2.2x", entry->atm_addr[i] & 0xff);
 985         seq_printf(seq, " %s %4.4x", lec_arp_get_status_string(entry->status),
 986                    entry->flags & 0xffff);
 987         if (entry->vcc)
 988                 seq_printf(seq, "%3d %3d ", entry->vcc->vpi, entry->vcc->vci);
 989         else
 990                 seq_printf(seq, "        ");
 991         if (entry->recv_vcc) {
 992                 seq_printf(seq, "     %3d %3d", entry->recv_vcc->vpi,
 993                            entry->recv_vcc->vci);
 994         }
 995         seq_putc(seq, '\n');
 996 }
 997
 998 struct lec_state {
 999         unsigned long flags;
1000         struct lec_priv *locked;
1001         struct lec_arp_table *entry;
1002         struct net_device *dev;
1003         int itf;
1004         int arp_table;
1005         int misc_table;
1006 };
1007
1008 static void *lec_tbl_walk(struct lec_state *state, struct lec_arp_table *tbl,
1009                           loff_t *l)
1010 {
1011         struct lec_arp_table *e = state->entry;
1012
1013         if (!e)
1014                 e = tbl;
1015         if (e == (void *)1) {
1016                 e = tbl;
1017                 --*l;
1018         }
1019         for (; e; e = e->next) {
1020                 if (--*l < 0)
1021                         break;
1022         }
1023         state->entry = e;
1024         return (*l < 0) ? state : NULL;
1025 }
1026
1027 static void *lec_arp_walk(struct lec_state *state, loff_t *l,
1028                           struct lec_priv *priv)
1029 {
1030         void *v = NULL;
1031         int p;
1032
1033         for (p = state->arp_table; p < LEC_ARP_TABLE_SIZE; p++) {
1034                 v = lec_tbl_walk(state, priv->lec_arp_tables[p], l);
1035                 if (v)
1036                         break;
1037         }
1038         state->arp_table = p;
1039         return v;
1040 }
1041
1042 static void *lec_misc_walk(struct lec_state *state, loff_t *l,
1043                            struct lec_priv *priv)
1044 {
1045         struct lec_arp_table *lec_misc_tables[] = {
1046                 priv->lec_arp_empty_ones,
1047                 priv->lec_no_forward,
1048                 priv->mcast_fwds
1049         };
1050         void *v = NULL;
1051         int q;
1052
1053         for (q = state->misc_table; q < ARRAY_SIZE(lec_misc_tables); q++) {
1054                 v = lec_tbl_walk(state, lec_misc_tables[q], l);
1055                 if (v)
1056                         break;
1057         }
1058         state->misc_table = q;
1059         return v;
1060 }
1061
1062 static void *lec_priv_walk(struct lec_state *state, loff_t *l,
1063                            struct lec_priv *priv)
1064 {
1065         if (!state->locked) {
1066                 state->locked = priv;
1067                 spin_lock_irqsave(&priv->lec_arp_lock, state->flags);
1068         }
1069         if (!lec_arp_walk(state, l, priv) && !lec_misc_walk(state, l, priv)) {
1070                 spin_unlock_irqrestore(&priv->lec_arp_lock, state->flags);
1071                 state->locked = NULL;
1072                 /* Partial state reset for the next time we get called */
1073                 state->arp_table = state->misc_table = 0;
1074         }
1075         return state->locked;
1076 }
1077
1078 static void *lec_itf_walk(struct lec_state *state, loff_t *l)
1079 {
1080         struct net_device *dev;
1081         void *v;
1082
1083         dev = state->dev ? state->dev : dev_lec[state->itf];
1084         v = (dev && dev->priv) ? lec_priv_walk(state, l, dev->priv) : NULL;
1085         if (!v && dev) {
1086                 dev_put(dev);
1087                 /* Partial state reset for the next time we get called */
1088                 dev = NULL;
1089         }
1090         state->dev = dev;
1091         return v;
1092 }
1093
1094 static void *lec_get_idx(struct lec_state *state, loff_t l)
1095 {
1096         void *v = NULL;
1097
1098         for (; state->itf < MAX_LEC_ITF; state->itf++) {
1099                 v = lec_itf_walk(state, &l);
1100                 if (v)
1101                         break;
1102         }
1103         return v;
1104 }
1105
1106 static void *lec_seq_start(struct seq_file *seq, loff_t *pos)
1107 {
1108         struct lec_state *state = seq->private;
1109
1110         state->itf = 0;
1111         state->dev = NULL;
1112         state->locked = NULL;
1113         state->arp_table = 0;
1114         state->misc_table = 0;
1115         state->entry = (void *)1;
1116
1117         return *pos ? lec_get_idx(state, *pos) : (void *)1;
1118 }
1119
1120 static void lec_seq_stop(struct seq_file *seq, void *v)
1121 {
1122         struct lec_state *state = seq->private;
1123
1124         if (state->dev) {
1125                 spin_unlock_irqrestore(&state->locked->lec_arp_lock,
1126                                        state->flags);
1127                 dev_put(state->dev);
1128         }
1129 }
1130
1131 static void *lec_seq_next(struct seq_file *seq, void *v, loff_t *pos)
1132 {
1133         struct lec_state *state = seq->private;
1134
1135         v = lec_get_idx(state, 1);
1136         *pos += !!PTR_ERR(v);
1137         return v;
1138 }
1139
1140 static int lec_seq_show(struct seq_file *seq, void *v)
1141 {
1142         static char lec_banner[] = "Itf  MAC          ATM destination"
1143             "                          Status            Flags "
1144             "VPI/VCI Recv VPI/VCI\n";
1145
1146         if (v == (void *)1)
1147                 seq_puts(seq, lec_banner);
1148         else {
1149                 struct lec_state *state = seq->private;
1150                 struct net_device *dev = state->dev;
1151
1152                 seq_printf(seq, "%s ", dev->name);
1153                 lec_info(seq, state->entry);
1154         }
1155         return 0;
1156 }
1157
1158 static struct seq_operations lec_seq_ops = {
1159         .start = lec_seq_start,
1160         .next = lec_seq_next,
1161         .stop = lec_seq_stop,
1162         .show = lec_seq_show,
1163 };
1164
1165 static int lec_seq_open(struct inode *inode, struct file *file)
1166 {
1167         struct lec_state *state;
1168         struct seq_file *seq;
1169         int rc = -EAGAIN;
1170
1171         state = kmalloc(sizeof(*state), GFP_KERNEL);
1172         if (!state) {
1173                 rc = -ENOMEM;
1174                 goto out;
1175         }
1176
1177         rc = seq_open(file, &lec_seq_ops);
1178         if (rc)
1179                 goto out_kfree;
1180         seq = file->private_data;
1181         seq->private = state;
1182 out:
1183         return rc;
1184
1185 out_kfree:
1186         kfree(state);
1187         goto out;
1188 }
1189
1190 static int lec_seq_release(struct inode *inode, struct file *file)
1191 {
1192         return seq_release_private(inode, file);
1193 }
1194
1195 static struct file_operations lec_seq_fops = {
1196         .owner = THIS_MODULE,
1197         .open = lec_seq_open,
1198         .read = seq_read,
1199         .llseek = seq_lseek,
1200         .release = lec_seq_release,
1201 };
1202 #endif
1203
1204 static int lane_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg)
1205 {
1206         struct atm_vcc *vcc = ATM_SD(sock);
1207         int err = 0;
1208
1209         switch (cmd) {
1210         case ATMLEC_CTRL:
1211         case ATMLEC_MCAST:
1212         case ATMLEC_DATA:
1213                 if (!capable(CAP_NET_ADMIN))
1214                         return -EPERM;
1215                 break;
1216         default:
1217                 return -ENOIOCTLCMD;
1218         }
1219
1220         switch (cmd) {
1221         case ATMLEC_CTRL:
1222                 err = lecd_attach(vcc, (int)arg);
1223                 if (err >= 0)
1224                         sock->state = SS_CONNECTED;
1225                 break;
1226         case ATMLEC_MCAST:
1227                 err = lec_mcast_attach(vcc, (int)arg);
1228                 break;
1229         case ATMLEC_DATA:
1230                 err = lec_vcc_attach(vcc, (void __user *)arg);
1231                 break;
1232         }
1233
1234         return err;
1235 }
1236
1237 static struct atm_ioctl lane_ioctl_ops = {
1238         .owner = THIS_MODULE,
1239         .ioctl = lane_ioctl,
1240 };
1241
1242 static int __init lane_module_init(void)
1243 {
1244 #ifdef CONFIG_PROC_FS
1245         struct proc_dir_entry *p;
1246
1247         p = create_proc_entry("lec", S_IRUGO, atm_proc_root);
1248         if (p)
1249                 p->proc_fops = &lec_seq_fops;
1250 #endif
1251
1252         register_atm_ioctl(&lane_ioctl_ops);
1253         printk("lec.c: " __DATE__ " " __TIME__ " initialized\n");
1254         return 0;
1255 }
1256
1257 static void __exit lane_module_cleanup(void)
1258 {
1259         int i;
1260         struct lec_priv *priv;
1261
1262         remove_proc_entry("lec", atm_proc_root);
1263
1264         deregister_atm_ioctl(&lane_ioctl_ops);
1265
1266         for (i = 0; i < MAX_LEC_ITF; i++) {
1267                 if (dev_lec[i] != NULL) {
1268                         priv = (struct lec_priv *)dev_lec[i]->priv;
1269                         unregister_netdev(dev_lec[i]);
1270                         free_netdev(dev_lec[i]);
1271                         dev_lec[i] = NULL;
1272                 }
1273         }
1274
1275         return;
1276 }
1277
1278 module_init(lane_module_init);
1279 module_exit(lane_module_cleanup);
1280
1281 /*
1282  * LANE2: 3.1.3, LE_RESOLVE.request
1283  * Non force allocates memory and fills in *tlvs, fills in *sizeoftlvs.
1284  * If sizeoftlvs == NULL the default TLVs associated with with this
1285  * lec will be used.
1286  * If dst_mac == NULL, targetless LE_ARP will be sent
1287  */
1288 static int lane2_resolve(struct net_device *dev, u8 *dst_mac, int force,
1289                          u8 **tlvs, u32 *sizeoftlvs)
1290 {
1291         unsigned long flags;
1292         struct lec_priv *priv = (struct lec_priv *)dev->priv;
1293         struct lec_arp_table *table;
1294         struct sk_buff *skb;
1295         int retval;
1296
1297         if (force == 0) {
1298                 spin_lock_irqsave(&priv->lec_arp_lock, flags);
1299                 table = lec_arp_find(priv, dst_mac);
1300                 spin_unlock_irqrestore(&priv->lec_arp_lock, flags);
1301                 if (table == NULL)
1302                         return -1;
1303
1304                 *tlvs = kmalloc(table->sizeoftlvs, GFP_ATOMIC);
1305                 if (*tlvs == NULL)
1306                         return -1;
1307
1308                 memcpy(*tlvs, table->tlvs, table->sizeoftlvs);
1309                 *sizeoftlvs = table->sizeoftlvs;
1310
1311                 return 0;
1312         }
1313
1314         if (sizeoftlvs == NULL)
1315                 retval = send_to_lecd(priv, l_arp_xmt, dst_mac, NULL, NULL);
1316
1317         else {
1318                 skb = alloc_skb(*sizeoftlvs, GFP_ATOMIC);
1319                 if (skb == NULL)
1320                         return -1;
1321                 skb->len = *sizeoftlvs;
1322                 memcpy(skb->data, *tlvs, *sizeoftlvs);
1323                 retval = send_to_lecd(priv, l_arp_xmt, dst_mac, NULL, skb);
1324         }
1325         return retval;
1326 }
1327
1328 /*
1329  * LANE2: 3.1.4, LE_ASSOCIATE.request
1330  * Associate the *tlvs with the *lan_dst address.
1331  * Will overwrite any previous association
1332  * Returns 1 for success, 0 for failure (out of memory)
1333  *
1334  */
1335 static int lane2_associate_req(struct net_device *dev, u8 *lan_dst,
1336                                u8 *tlvs, u32 sizeoftlvs)
1337 {
1338         int retval;
1339         struct sk_buff *skb;
1340         struct lec_priv *priv = (struct lec_priv *)dev->priv;
1341
1342         if (compare_ether_addr(lan_dst, dev->dev_addr))
1343                 return (0);     /* not our mac address */
1344
1345         kfree(priv->tlvs);      /* NULL if there was no previous association */
1346
1347         priv->tlvs = kmalloc(sizeoftlvs, GFP_KERNEL);
1348         if (priv->tlvs == NULL)
1349                 return (0);
1350         priv->sizeoftlvs = sizeoftlvs;
1351         memcpy(priv->tlvs, tlvs, sizeoftlvs);
1352
1353         skb = alloc_skb(sizeoftlvs, GFP_ATOMIC);
1354         if (skb == NULL)
1355                 return 0;
1356         skb->len = sizeoftlvs;
1357         memcpy(skb->data, tlvs, sizeoftlvs);
1358         retval = send_to_lecd(priv, l_associate_req, NULL, NULL, skb);
1359         if (retval != 0)
1360                 printk("lec.c: lane2_associate_req() failed\n");
1361         /*
1362          * If the previous association has changed we must
1363          * somehow notify other LANE entities about the change
1364          */
1365         return (1);
1366 }
1367
1368 /*
1369  * LANE2: 3.1.5, LE_ASSOCIATE.indication
1370  *
1371  */
1372 static void lane2_associate_ind(struct net_device *dev, u8 *mac_addr,
1373                                 u8 *tlvs, u32 sizeoftlvs)
1374 {
1375 #if 0
1376         int i = 0;
1377 #endif
1378         struct lec_priv *priv = (struct lec_priv *)dev->priv;
1379 #if 0                           /*
1380                                  * Why have the TLVs in LE_ARP entries
1381                                  * since we do not use them? When you
1382                                  * uncomment this code, make sure the
1383                                  * TLVs get freed when entry is killed
1384                                  */
1385         struct lec_arp_table *entry = lec_arp_find(priv, mac_addr);
1386
1387         if (entry == NULL)
1388                 return;         /* should not happen */
1389
1390         kfree(entry->tlvs);
1391
1392         entry->tlvs = kmalloc(sizeoftlvs, GFP_KERNEL);
1393         if (entry->tlvs == NULL)
1394                 return;
1395
1396         entry->sizeoftlvs = sizeoftlvs;
1397         memcpy(entry->tlvs, tlvs, sizeoftlvs);
1398 #endif
1399 #if 0
1400         printk("lec.c: lane2_associate_ind()\n");
1401         printk("dump of tlvs, sizeoftlvs=%d\n", sizeoftlvs);
1402         while (i < sizeoftlvs)
1403                 printk("%02x ", tlvs[i++]);
1404
1405         printk("\n");
1406 #endif
1407
1408         /* tell MPOA about the TLVs we saw */
1409         if (priv->lane2_ops && priv->lane2_ops->associate_indicator) {
1410                 priv->lane2_ops->associate_indicator(dev, mac_addr,
1411                                                      tlvs, sizeoftlvs);
1412         }
1413         return;
1414 }
1415
1416 /*
1417  * Here starts what used to lec_arpc.c
1418  *
1419  * lec_arpc.c was added here when making
1420  * lane client modular. October 1997
1421  */
1422
1423 #include <linux/types.h>
1424 #include <linux/sched.h>
1425 #include <linux/timer.h>
1426 #include <asm/param.h>
1427 #include <asm/atomic.h>
1428 #include <linux/inetdevice.h>
1429 #include <net/route.h>
1430
1431 #if 0
1432 #define DPRINTK(format,args...)
1433 /*
1434 #define DPRINTK printk
1435 */
1436 #endif
1437 #define DEBUG_ARP_TABLE 0
1438
1439 #define LEC_ARP_REFRESH_INTERVAL (3*HZ)
1440
1441 static void lec_arp_check_expire(unsigned long data);
1442 static void lec_arp_expire_arp(unsigned long data);
1443
1444 /*
1445  * Arp table funcs
1446  */
1447
1448 #define HASH(ch) (ch & (LEC_ARP_TABLE_SIZE -1))
1449
1450 /*
1451  * Initialization of arp-cache
1452  */
1453 static void lec_arp_init(struct lec_priv *priv)
1454 {
1455         unsigned short i;
1456
1457         for (i = 0; i < LEC_ARP_TABLE_SIZE; i++) {
1458                 priv->lec_arp_tables[i] = NULL;
1459         }
1460         spin_lock_init(&priv->lec_arp_lock);
1461         init_timer(&priv->lec_arp_timer);
1462         priv->lec_arp_timer.expires = jiffies + LEC_ARP_REFRESH_INTERVAL;
1463         priv->lec_arp_timer.data = (unsigned long)priv;
1464         priv->lec_arp_timer.function = lec_arp_check_expire;
1465         add_timer(&priv->lec_arp_timer);
1466 }
1467
1468 static void lec_arp_clear_vccs(struct lec_arp_table *entry)
1469 {
1470         if (entry->vcc) {
1471                 struct atm_vcc *vcc = entry->vcc;
1472                 struct lec_vcc_priv *vpriv = LEC_VCC_PRIV(vcc);
1473                 struct net_device *dev = (struct net_device *)vcc->proto_data;
1474
1475                 vcc->pop = vpriv->old_pop;
1476                 if (vpriv->xoff)
1477                         netif_wake_queue(dev);
1478                 kfree(vpriv);
1479                 vcc->user_back = NULL;
1480                 vcc->push = entry->old_push;
1481                 vcc_release_async(vcc, -EPIPE);
1482                 vcc = NULL;
1483         }
1484         if (entry->recv_vcc) {
1485                 entry->recv_vcc->push = entry->old_recv_push;
1486                 vcc_release_async(entry->recv_vcc, -EPIPE);
1487                 entry->recv_vcc = NULL;
1488         }
1489 }
1490
1491 /*
1492  * Insert entry to lec_arp_table
1493  * LANE2: Add to the end of the list to satisfy 8.1.13
1494  */
1495 static inline void
1496 lec_arp_add(struct lec_priv *priv, struct lec_arp_table *to_add)
1497 {
1498         unsigned short place;
1499         struct lec_arp_table *tmp;
1500
1501         place = HASH(to_add->mac_addr[ETH_ALEN - 1]);
1502         tmp = priv->lec_arp_tables[place];
1503         to_add->next = NULL;
1504         if (tmp == NULL)
1505                 priv->lec_arp_tables[place] = to_add;
1506
1507         else {                  /* add to the end */
1508                 while (tmp->next)
1509                         tmp = tmp->next;
1510                 tmp->next = to_add;
1511         }
1512
1513         DPRINTK("LEC_ARP: Added entry:%2.2x %2.2x %2.2x %2.2x %2.2x %2.2x\n",
1514                 0xff & to_add->mac_addr[0], 0xff & to_add->mac_addr[1],
1515                 0xff & to_add->mac_addr[2], 0xff & to_add->mac_addr[3],
1516                 0xff & to_add->mac_addr[4], 0xff & to_add->mac_addr[5]);
1517 }
1518
1519 /*
1520  * Remove entry from lec_arp_table
1521  */
1522 static int
1523 lec_arp_remove(struct lec_priv *priv, struct lec_arp_table *to_remove)
1524 {
1525         unsigned short place;
1526         struct lec_arp_table *tmp;
1527         int remove_vcc = 1;
1528
1529         if (!to_remove) {
1530                 return -1;
1531         }
1532         place = HASH(to_remove->mac_addr[ETH_ALEN - 1]);
1533         tmp = priv->lec_arp_tables[place];
1534         if (tmp == to_remove) {
1535                 priv->lec_arp_tables[place] = tmp->next;
1536         } else {
1537                 while (tmp && tmp->next != to_remove) {
1538                         tmp = tmp->next;
1539                 }
1540                 if (!tmp) {     /* Entry was not found */
1541                         return -1;
1542                 }
1543         }
1544         tmp->next = to_remove->next;
1545         del_timer(&to_remove->timer);
1546
1547         /* If this is the only MAC connected to this VCC, also tear down
1548            the VCC */
1549         if (to_remove->status >= ESI_FLUSH_PENDING) {
1550                 /*
1551                  * ESI_FLUSH_PENDING, ESI_FORWARD_DIRECT
1552                  */
1553                 for (place = 0; place < LEC_ARP_TABLE_SIZE; place++) {
1554                         for (tmp = priv->lec_arp_tables[place]; tmp != NULL;
1555                              tmp = tmp->next) {
1556                                 if (memcmp
1557                                     (tmp->atm_addr, to_remove->atm_addr,
1558                                      ATM_ESA_LEN) == 0) {
1559                                         remove_vcc = 0;
1560                                         break;
1561                                 }
1562                         }
1563                 }
1564                 if (remove_vcc)
1565                         lec_arp_clear_vccs(to_remove);
1566         }
1567         skb_queue_purge(&to_remove->tx_wait);   /* FIXME: good place for this? */
1568
1569         DPRINTK("LEC_ARP: Removed entry:%2.2x %2.2x %2.2x %2.2x %2.2x %2.2x\n",
1570                 0xff & to_remove->mac_addr[0], 0xff & to_remove->mac_addr[1],
1571                 0xff & to_remove->mac_addr[2], 0xff & to_remove->mac_addr[3],
1572                 0xff & to_remove->mac_addr[4], 0xff & to_remove->mac_addr[5]);
1573         return 0;
1574 }
1575
1576 #if DEBUG_ARP_TABLE
1577 static char *get_status_string(unsigned char st)
1578 {
1579         switch (st) {
1580         case ESI_UNKNOWN:
1581                 return "ESI_UNKNOWN";
1582         case ESI_ARP_PENDING:
1583                 return "ESI_ARP_PENDING";
1584         case ESI_VC_PENDING:
1585                 return "ESI_VC_PENDING";
1586         case ESI_FLUSH_PENDING:
1587                 return "ESI_FLUSH_PENDING";
1588         case ESI_FORWARD_DIRECT:
1589                 return "ESI_FORWARD_DIRECT";
1590         default:
1591                 return "<UNKNOWN>";
1592         }
1593 }
1594 #endif
1595
1596 static void dump_arp_table(struct lec_priv *priv)
1597 {
1598 #if DEBUG_ARP_TABLE
1599         int i, j, offset;
1600         struct lec_arp_table *rulla;
1601         char buf[1024];
1602         struct lec_arp_table **lec_arp_tables =
1603             (struct lec_arp_table **)priv->lec_arp_tables;
1604         struct lec_arp_table *lec_arp_empty_ones =
1605             (struct lec_arp_table *)priv->lec_arp_empty_ones;
1606         struct lec_arp_table *lec_no_forward =
1607             (struct lec_arp_table *)priv->lec_no_forward;
1608         struct lec_arp_table *mcast_fwds = priv->mcast_fwds;
1609
1610         printk("Dump %p:\n", priv);
1611         for (i = 0; i < LEC_ARP_TABLE_SIZE; i++) {
1612                 rulla = lec_arp_tables[i];
1613                 offset = 0;
1614                 offset += sprintf(buf, "%d: %p\n", i, rulla);
1615                 while (rulla) {
1616                         offset += sprintf(buf + offset, "Mac:");
1617                         for (j = 0; j < ETH_ALEN; j++) {
1618                                 offset += sprintf(buf + offset,
1619                                                   "%2.2x ",
1620                                                   rulla->mac_addr[j] & 0xff);
1621                         }
1622                         offset += sprintf(buf + offset, "Atm:");
1623                         for (j = 0; j < ATM_ESA_LEN; j++) {
1624                                 offset += sprintf(buf + offset,
1625                                                   "%2.2x ",
1626                                                   rulla->atm_addr[j] & 0xff);
1627                         }
1628                         offset += sprintf(buf + offset,
1629                                           "Vcc vpi:%d vci:%d, Recv_vcc vpi:%d vci:%d Last_used:%lx, Timestamp:%lx, No_tries:%d ",
1630                                           rulla->vcc ? rulla->vcc->vpi : 0,
1631                                           rulla->vcc ? rulla->vcc->vci : 0,
1632                                           rulla->recv_vcc ? rulla->recv_vcc->
1633                                           vpi : 0,
1634                                           rulla->recv_vcc ? rulla->recv_vcc->
1635                                           vci : 0, rulla->last_used,
1636                                           rulla->timestamp, rulla->no_tries);
1637                         offset +=
1638                             sprintf(buf + offset,
1639                                     "Flags:%x, Packets_flooded:%x, Status: %s ",
1640                                     rulla->flags, rulla->packets_flooded,
1641                                     get_status_string(rulla->status));
1642                         offset += sprintf(buf + offset, "->%p\n", rulla->next);
1643                         rulla = rulla->next;
1644                 }
1645                 printk("%s", buf);
1646         }
1647         rulla = lec_no_forward;
1648         if (rulla)
1649                 printk("No forward\n");
1650         while (rulla) {
1651                 offset = 0;
1652                 offset += sprintf(buf + offset, "Mac:");
1653                 for (j = 0; j < ETH_ALEN; j++) {
1654                         offset += sprintf(buf + offset, "%2.2x ",
1655                                           rulla->mac_addr[j] & 0xff);
1656                 }
1657                 offset += sprintf(buf + offset, "Atm:");
1658                 for (j = 0; j < ATM_ESA_LEN; j++) {
1659                         offset += sprintf(buf + offset, "%2.2x ",
1660                                           rulla->atm_addr[j] & 0xff);
1661                 }
1662                 offset += sprintf(buf + offset,
1663                                   "Vcc vpi:%d vci:%d, Recv_vcc vpi:%d vci:%d Last_used:%lx, Timestamp:%lx, No_tries:%d ",
1664                                   rulla->vcc ? rulla->vcc->vpi : 0,
1665                                   rulla->vcc ? rulla->vcc->vci : 0,
1666                                   rulla->recv_vcc ? rulla->recv_vcc->vpi : 0,
1667                                   rulla->recv_vcc ? rulla->recv_vcc->vci : 0,
1668                                   rulla->last_used,
1669                                   rulla->timestamp, rulla->no_tries);
1670                 offset += sprintf(buf + offset,
1671                                   "Flags:%x, Packets_flooded:%x, Status: %s ",
1672                                   rulla->flags, rulla->packets_flooded,
1673                                   get_status_string(rulla->status));
1674                 offset += sprintf(buf + offset, "->%lx\n", (long)rulla->next);
1675                 rulla = rulla->next;
1676                 printk("%s", buf);
1677         }
1678         rulla = lec_arp_empty_ones;
1679         if (rulla)
1680                 printk("Empty ones\n");
1681         while (rulla) {
1682                 offset = 0;
1683                 offset += sprintf(buf + offset, "Mac:");
1684                 for (j = 0; j < ETH_ALEN; j++) {
1685                         offset += sprintf(buf + offset, "%2.2x ",
1686                                           rulla->mac_addr[j] & 0xff);
1687                 }
1688                 offset += sprintf(buf + offset, "Atm:");
1689                 for (j = 0; j < ATM_ESA_LEN; j++) {
1690                         offset += sprintf(buf + offset, "%2.2x ",
1691                                           rulla->atm_addr[j] & 0xff);
1692                 }
1693                 offset += sprintf(buf + offset,
1694                                   "Vcc vpi:%d vci:%d, Recv_vcc vpi:%d vci:%d Last_used:%lx, Timestamp:%lx, No_tries:%d ",
1695                                   rulla->vcc ? rulla->vcc->vpi : 0,
1696                                   rulla->vcc ? rulla->vcc->vci : 0,
1697                                   rulla->recv_vcc ? rulla->recv_vcc->vpi : 0,
1698                                   rulla->recv_vcc ? rulla->recv_vcc->vci : 0,
1699                                   rulla->last_used,
1700                                   rulla->timestamp, rulla->no_tries);
1701                 offset += sprintf(buf + offset,
1702                                   "Flags:%x, Packets_flooded:%x, Status: %s ",
1703                                   rulla->flags, rulla->packets_flooded,
1704                                   get_status_string(rulla->status));
1705                 offset += sprintf(buf + offset, "->%lx\n", (long)rulla->next);
1706                 rulla = rulla->next;
1707                 printk("%s", buf);
1708         }
1709
1710         rulla = mcast_fwds;
1711         if (rulla)
1712                 printk("Multicast Forward VCCs\n");
1713         while (rulla) {
1714                 offset = 0;
1715                 offset += sprintf(buf + offset, "Mac:");
1716                 for (j = 0; j < ETH_ALEN; j++) {
1717                         offset += sprintf(buf + offset, "%2.2x ",
1718                                           rulla->mac_addr[j] & 0xff);
1719                 }
1720                 offset += sprintf(buf + offset, "Atm:");
1721                 for (j = 0; j < ATM_ESA_LEN; j++) {
1722                         offset += sprintf(buf + offset, "%2.2x ",
1723                                           rulla->atm_addr[j] & 0xff);
1724                 }
1725                 offset += sprintf(buf + offset,
1726                                   "Vcc vpi:%d vci:%d, Recv_vcc vpi:%d vci:%d Last_used:%lx, Timestamp:%lx, No_tries:%d ",
1727                                   rulla->vcc ? rulla->vcc->vpi : 0,
1728                                   rulla->vcc ? rulla->vcc->vci : 0,
1729                                   rulla->recv_vcc ? rulla->recv_vcc->vpi : 0,
1730                                   rulla->recv_vcc ? rulla->recv_vcc->vci : 0,
1731                                   rulla->last_used,
1732                                   rulla->timestamp, rulla->no_tries);
1733                 offset += sprintf(buf + offset,
1734                                   "Flags:%x, Packets_flooded:%x, Status: %s ",
1735                                   rulla->flags, rulla->packets_flooded,
1736                                   get_status_string(rulla->status));
1737                 offset += sprintf(buf + offset, "->%lx\n", (long)rulla->next);
1738                 rulla = rulla->next;
1739                 printk("%s", buf);
1740         }
1741
1742 #endif
1743 }
1744
1745 /*
1746  * Destruction of arp-cache
1747  */
1748 static void lec_arp_destroy(struct lec_priv *priv)
1749 {
1750         unsigned long flags;
1751         struct lec_arp_table *entry, *next;
1752         int i;
1753
1754         del_timer_sync(&priv->lec_arp_timer);
1755
1756         /*
1757          * Remove all entries
1758          */
1759
1760         spin_lock_irqsave(&priv->lec_arp_lock, flags);
1761         for (i = 0; i < LEC_ARP_TABLE_SIZE; i++) {
1762                 for (entry = priv->lec_arp_tables[i]; entry != NULL;
1763                      entry = next) {
1764                         next = entry->next;
1765                         lec_arp_remove(priv, entry);
1766                         kfree(entry);
1767                 }
1768         }
1769         entry = priv->lec_arp_empty_ones;
1770         while (entry) {
1771                 next = entry->next;
1772                 del_timer_sync(&entry->timer);
1773                 lec_arp_clear_vccs(entry);
1774                 kfree(entry);
1775                 entry = next;
1776         }
1777         priv->lec_arp_empty_ones = NULL;
1778         entry = priv->lec_no_forward;
1779         while (entry) {
1780                 next = entry->next;
1781                 del_timer_sync(&entry->timer);
1782                 lec_arp_clear_vccs(entry);
1783                 kfree(entry);
1784                 entry = next;
1785         }
1786         priv->lec_no_forward = NULL;
1787         entry = priv->mcast_fwds;
1788         while (entry) {
1789                 next = entry->next;
1790                 /* No timer, LANEv2 7.1.20 and 2.3.5.3 */
1791                 lec_arp_clear_vccs(entry);
1792                 kfree(entry);
1793                 entry = next;
1794         }
1795         priv->mcast_fwds = NULL;
1796         priv->mcast_vcc = NULL;
1797         memset(priv->lec_arp_tables, 0,
1798                sizeof(struct lec_arp_table *) * LEC_ARP_TABLE_SIZE);
1799         spin_unlock_irqrestore(&priv->lec_arp_lock, flags);
1800 }
1801
1802 /*
1803  * Find entry by mac_address
1804  */
1805 static struct lec_arp_table *lec_arp_find(struct lec_priv *priv,
1806                                           unsigned char *mac_addr)
1807 {
1808         unsigned short place;
1809         struct lec_arp_table *to_return;
1810
1811         DPRINTK("LEC_ARP: lec_arp_find :%2.2x %2.2x %2.2x %2.2x %2.2x %2.2x\n",
1812                 mac_addr[0] & 0xff, mac_addr[1] & 0xff, mac_addr[2] & 0xff,
1813                 mac_addr[3] & 0xff, mac_addr[4] & 0xff, mac_addr[5] & 0xff);
1814         place = HASH(mac_addr[ETH_ALEN - 1]);
1815
1816         to_return = priv->lec_arp_tables[place];
1817         while (to_return) {
1818                 if (!compare_ether_addr(mac_addr, to_return->mac_addr)) {
1819                         return to_return;
1820                 }
1821                 to_return = to_return->next;
1822         }
1823         return NULL;
1824 }
1825
1826 static struct lec_arp_table *make_entry(struct lec_priv *priv,
1827                                         unsigned char *mac_addr)
1828 {
1829         struct lec_arp_table *to_return;
1830
1831         to_return = kzalloc(sizeof(struct lec_arp_table), GFP_ATOMIC);
1832         if (!to_return) {
1833                 printk("LEC: Arp entry kmalloc failed\n");
1834                 return NULL;
1835         }
1836         memcpy(to_return->mac_addr, mac_addr, ETH_ALEN);
1837         init_timer(&to_return->timer);
1838         to_return->timer.function = lec_arp_expire_arp;
1839         to_return->timer.data = (unsigned long)to_return;
1840         to_return->last_used = jiffies;
1841         to_return->priv = priv;
1842         skb_queue_head_init(&to_return->tx_wait);
1843         return to_return;
1844 }
1845
1846 /* Arp sent timer expired */
1847 static void lec_arp_expire_arp(unsigned long data)
1848 {
1849         struct lec_arp_table *entry;
1850
1851         entry = (struct lec_arp_table *)data;
1852
1853         DPRINTK("lec_arp_expire_arp\n");
1854         if (entry->status == ESI_ARP_PENDING) {
1855                 if (entry->no_tries <= entry->priv->max_retry_count) {
1856                         if (entry->is_rdesc)
1857                                 send_to_lecd(entry->priv, l_rdesc_arp_xmt,
1858                                              entry->mac_addr, NULL, NULL);
1859                         else
1860                                 send_to_lecd(entry->priv, l_arp_xmt,
1861                                              entry->mac_addr, NULL, NULL);
1862                         entry->no_tries++;
1863                 }
1864                 mod_timer(&entry->timer, jiffies + (1 * HZ));
1865         }
1866 }
1867
1868 /* Unknown/unused vcc expire, remove associated entry */
1869 static void lec_arp_expire_vcc(unsigned long data)
1870 {
1871         unsigned long flags;
1872         struct lec_arp_table *to_remove = (struct lec_arp_table *)data;
1873         struct lec_priv *priv = (struct lec_priv *)to_remove->priv;
1874         struct lec_arp_table *entry = NULL;
1875
1876         del_timer(&to_remove->timer);
1877
1878         DPRINTK("LEC_ARP %p %p: lec_arp_expire_vcc vpi:%d vci:%d\n",
1879                 to_remove, priv,
1880                 to_remove->vcc ? to_remove->recv_vcc->vpi : 0,
1881                 to_remove->vcc ? to_remove->recv_vcc->vci : 0);
1882         DPRINTK("eo:%p nf:%p\n", priv->lec_arp_empty_ones,
1883                 priv->lec_no_forward);
1884
1885         spin_lock_irqsave(&priv->lec_arp_lock, flags);
1886         if (to_remove == priv->lec_arp_empty_ones)
1887                 priv->lec_arp_empty_ones = to_remove->next;
1888         else {
1889                 entry = priv->lec_arp_empty_ones;
1890                 while (entry && entry->next != to_remove)
1891                         entry = entry->next;
1892                 if (entry)
1893                         entry->next = to_remove->next;
1894         }
1895         if (!entry) {
1896                 if (to_remove == priv->lec_no_forward) {
1897                         priv->lec_no_forward = to_remove->next;
1898                 } else {
1899                         entry = priv->lec_no_forward;
1900                         while (entry && entry->next != to_remove)
1901                                 entry = entry->next;
1902                         if (entry)
1903                                 entry->next = to_remove->next;
1904                 }
1905         }
1906         spin_unlock_irqrestore(&priv->lec_arp_lock, flags);
1907
1908         lec_arp_clear_vccs(to_remove);
1909         kfree(to_remove);
1910 }
1911
1912 /*
1913  * Expire entries.
1914  * 1. Re-set timer
1915  * 2. For each entry, delete entries that have aged past the age limit.
1916  * 3. For each entry, depending on the status of the entry, perform
1917  *    the following maintenance.
1918  *    a. If status is ESI_VC_PENDING or ESI_ARP_PENDING then if the
1919  *       tick_count is above the max_unknown_frame_time, clear
1920  *       the tick_count to zero and clear the packets_flooded counter
1921  *       to zero. This supports the packet rate limit per address
1922  *       while flooding unknowns.
1923  *    b. If the status is ESI_FLUSH_PENDING and the tick_count is greater
1924  *       than or equal to the path_switching_delay, change the status
1925  *       to ESI_FORWARD_DIRECT. This causes the flush period to end
1926  *       regardless of the progress of the flush protocol.
1927  */
1928 static void lec_arp_check_expire(unsigned long data)
1929 {
1930         unsigned long flags;
1931         struct lec_priv *priv = (struct lec_priv *)data;
1932         struct lec_arp_table *entry, *next;
1933         unsigned long now;
1934         unsigned long time_to_check;
1935         int i;
1936
1937         DPRINTK("lec_arp_check_expire %p\n", priv);
1938         DPRINTK("expire: eo:%p nf:%p\n", priv->lec_arp_empty_ones,
1939                 priv->lec_no_forward);
1940         now = jiffies;
1941         spin_lock_irqsave(&priv->lec_arp_lock, flags);
1942         for (i = 0; i < LEC_ARP_TABLE_SIZE; i++) {
1943                 for (entry = priv->lec_arp_tables[i]; entry != NULL;) {
1944                         if ((entry->flags) & LEC_REMOTE_FLAG &&
1945                             priv->topology_change)
1946                                 time_to_check = priv->forward_delay_time;
1947                         else
1948                                 time_to_check = priv->aging_time;
1949
1950                         DPRINTK("About to expire: %lx - %lx > %lx\n",
1951                                 now, entry->last_used, time_to_check);
1952                         if (time_after(now, entry->last_used + time_to_check)
1953                             && !(entry->flags & LEC_PERMANENT_FLAG)
1954                             && !(entry->mac_addr[0] & 0x01)) {  /* LANE2: 7.1.20 */
1955                                 /* Remove entry */
1956                                 DPRINTK("LEC:Entry timed out\n");
1957                                 next = entry->next;
1958                                 lec_arp_remove(priv, entry);
1959                                 kfree(entry);
1960                                 entry = next;
1961                         } else {
1962                                 /* Something else */
1963                                 if ((entry->status == ESI_VC_PENDING ||
1964                                      entry->status == ESI_ARP_PENDING)
1965                                     && time_after_eq(now,
1966                                                      entry->timestamp +
1967                                                      priv->
1968                                                      max_unknown_frame_time)) {
1969                                         entry->timestamp = jiffies;
1970                                         entry->packets_flooded = 0;
1971                                         if (entry->status == ESI_VC_PENDING)
1972                                                 send_to_lecd(priv, l_svc_setup,
1973                                                              entry->mac_addr,
1974                                                              entry->atm_addr,
1975                                                              NULL);
1976                                 }
1977                                 if (entry->status == ESI_FLUSH_PENDING
1978                                     &&
1979                                     time_after_eq(now, entry->timestamp +
1980                                                   priv->path_switching_delay)) {
1981                                         struct sk_buff *skb;
1982
1983                                         while ((skb =
1984                                                 skb_dequeue(&entry->tx_wait)) !=
1985                                                NULL)
1986                                                 lec_send(entry->vcc, skb,
1987                                                          entry->priv);
1988                                         entry->last_used = jiffies;
1989                                         entry->status = ESI_FORWARD_DIRECT;
1990                                 }
1991                                 entry = entry->next;
1992                         }
1993                 }
1994         }
1995         spin_unlock_irqrestore(&priv->lec_arp_lock, flags);
1996
1997         mod_timer(&priv->lec_arp_timer, jiffies + LEC_ARP_REFRESH_INTERVAL);
1998 }
1999
2000 /*
2001  * Try to find vcc where mac_address is attached.
2002  *
2003  */
2004 static struct atm_vcc *lec_arp_resolve(struct lec_priv *priv,
2005                                        unsigned char *mac_to_find, int is_rdesc,
2006                                        struct lec_arp_table **ret_entry)
2007 {
2008         unsigned long flags;
2009         struct lec_arp_table *entry;
2010         struct atm_vcc *found;
2011
2012         if (mac_to_find[0] & 0x01) {
2013                 switch (priv->lane_version) {
2014                 case 1:
2015                         return priv->mcast_vcc;
2016                         break;
2017                 case 2: /* LANE2 wants arp for multicast addresses */
2018                         if (!compare_ether_addr(mac_to_find, bus_mac))
2019                                 return priv->mcast_vcc;
2020                         break;
2021                 default:
2022                         break;
2023                 }
2024         }
2025
2026         spin_lock_irqsave(&priv->lec_arp_lock, flags);
2027         entry = lec_arp_find(priv, mac_to_find);
2028
2029         if (entry) {
2030                 if (entry->status == ESI_FORWARD_DIRECT) {
2031                         /* Connection Ok */
2032                         entry->last_used = jiffies;
2033                         *ret_entry = entry;
2034                         found = entry->vcc;
2035                         goto out;
2036                 }
2037                 /*
2038                  * If the LE_ARP cache entry is still pending, reset count to 0
2039                  * so another LE_ARP request can be made for this frame.
2040                  */
2041                 if (entry->status == ESI_ARP_PENDING) {
2042                         entry->no_tries = 0;
2043                 }
2044                 /*
2045                  * Data direct VC not yet set up, check to see if the unknown
2046                  * frame count is greater than the limit. If the limit has
2047                  * not been reached, allow the caller to send packet to
2048                  * BUS.
2049                  */
2050                 if (entry->status != ESI_FLUSH_PENDING &&
2051                     entry->packets_flooded <
2052                     priv->maximum_unknown_frame_count) {
2053                         entry->packets_flooded++;
2054                         DPRINTK("LEC_ARP: Flooding..\n");
2055                         found = priv->mcast_vcc;
2056                         goto out;
2057                 }
2058                 /*
2059                  * We got here because entry->status == ESI_FLUSH_PENDING
2060                  * or BUS flood limit was reached for an entry which is
2061                  * in ESI_ARP_PENDING or ESI_VC_PENDING state.
2062                  */
2063                 *ret_entry = entry;
2064                 DPRINTK("lec: entry->status %d entry->vcc %p\n", entry->status,
2065                         entry->vcc);
2066                 found = NULL;
2067         } else {
2068                 /* No matching entry was found */
2069                 entry = make_entry(priv, mac_to_find);
2070                 DPRINTK("LEC_ARP: Making entry\n");
2071                 if (!entry) {
2072                         found = priv->mcast_vcc;
2073                         goto out;
2074                 }
2075                 lec_arp_add(priv, entry);
2076                 /* We want arp-request(s) to be sent */
2077                 entry->packets_flooded = 1;
2078                 entry->status = ESI_ARP_PENDING;
2079                 entry->no_tries = 1;
2080                 entry->last_used = entry->timestamp = jiffies;
2081                 entry->is_rdesc = is_rdesc;
2082                 if (entry->is_rdesc)
2083                         send_to_lecd(priv, l_rdesc_arp_xmt, mac_to_find, NULL,
2084                                      NULL);
2085                 else
2086                         send_to_lecd(priv, l_arp_xmt, mac_to_find, NULL, NULL);
2087                 entry->timer.expires = jiffies + (1 * HZ);
2088                 entry->timer.function = lec_arp_expire_arp;
2089                 add_timer(&entry->timer);
2090                 found = priv->mcast_vcc;
2091         }
2092
2093 out:
2094         spin_unlock_irqrestore(&priv->lec_arp_lock, flags);
2095         return found;
2096 }
2097
2098 static int
2099 lec_addr_delete(struct lec_priv *priv, unsigned char *atm_addr,
2100                 unsigned long permanent)
2101 {
2102         unsigned long flags;
2103         struct lec_arp_table *entry, *next;
2104         int i;
2105
2106         DPRINTK("lec_addr_delete\n");
2107         spin_lock_irqsave(&priv->lec_arp_lock, flags);
2108         for (i = 0; i < LEC_ARP_TABLE_SIZE; i++) {
2109                 for (entry = priv->lec_arp_tables[i]; entry != NULL;
2110                      entry = next) {
2111                         next = entry->next;
2112                         if (!memcmp(atm_addr, entry->atm_addr, ATM_ESA_LEN)
2113                             && (permanent ||
2114                                 !(entry->flags & LEC_PERMANENT_FLAG))) {
2115                                 lec_arp_remove(priv, entry);
2116                                 kfree(entry);
2117                         }
2118                         spin_unlock_irqrestore(&priv->lec_arp_lock, flags);
2119                         return 0;
2120                 }
2121         }
2122         spin_unlock_irqrestore(&priv->lec_arp_lock, flags);
2123         return -1;
2124 }
2125
2126 /*
2127  * Notifies:  Response to arp_request (atm_addr != NULL)
2128  */
2129 static void
2130 lec_arp_update(struct lec_priv *priv, unsigned char *mac_addr,
2131                unsigned char *atm_addr, unsigned long remoteflag,
2132                unsigned int targetless_le_arp)
2133 {
2134         unsigned long flags;
2135         struct lec_arp_table *entry, *tmp;
2136         int i;
2137
2138         DPRINTK("lec:%s", (targetless_le_arp) ? "targetless " : " ");
2139         DPRINTK("lec_arp_update mac:%2.2x%2.2x%2.2x%2.2x%2.2x%2.2x\n",
2140                 mac_addr[0], mac_addr[1], mac_addr[2], mac_addr[3],
2141                 mac_addr[4], mac_addr[5]);
2142
2143         spin_lock_irqsave(&priv->lec_arp_lock, flags);
2144         entry = lec_arp_find(priv, mac_addr);
2145         if (entry == NULL && targetless_le_arp)
2146                 goto out;       /*
2147                                  * LANE2: ignore targetless LE_ARPs for which
2148                                  * we have no entry in the cache. 7.1.30
2149                                  */
2150         if (priv->lec_arp_empty_ones) {
2151                 entry = priv->lec_arp_empty_ones;
2152                 if (!memcmp(entry->atm_addr, atm_addr, ATM_ESA_LEN)) {
2153                         priv->lec_arp_empty_ones = entry->next;
2154                 } else {
2155                         while (entry->next && memcmp(entry->next->atm_addr,
2156                                                      atm_addr, ATM_ESA_LEN))
2157                                 entry = entry->next;
2158                         if (entry->next) {
2159                                 tmp = entry;
2160                                 entry = entry->next;
2161                                 tmp->next = entry->next;
2162                         } else
2163                                 entry = NULL;
2164
2165                 }
2166                 if (entry) {
2167                         del_timer(&entry->timer);
2168                         tmp = lec_arp_find(priv, mac_addr);
2169                         if (tmp) {
2170                                 del_timer(&tmp->timer);
2171                                 tmp->status = ESI_FORWARD_DIRECT;
2172                                 memcpy(tmp->atm_addr, atm_addr, ATM_ESA_LEN);
2173                                 tmp->vcc = entry->vcc;
2174                                 tmp->old_push = entry->old_push;
2175                                 tmp->last_used = jiffies;
2176                                 del_timer(&entry->timer);
2177                                 kfree(entry);
2178                                 entry = tmp;
2179                         } else {
2180                                 entry->status = ESI_FORWARD_DIRECT;
2181                                 memcpy(entry->mac_addr, mac_addr, ETH_ALEN);
2182                                 entry->last_used = jiffies;
2183                                 lec_arp_add(priv, entry);
2184                         }
2185                         if (remoteflag)
2186                                 entry->flags |= LEC_REMOTE_FLAG;
2187                         else
2188                                 entry->flags &= ~LEC_REMOTE_FLAG;
2189                         DPRINTK("After update\n");
2190                         dump_arp_table(priv);
2191                         goto out;
2192                 }
2193         }
2194         entry = lec_arp_find(priv, mac_addr);
2195         if (!entry) {
2196                 entry = make_entry(priv, mac_addr);
2197                 if (!entry)
2198                         goto out;
2199                 entry->status = ESI_UNKNOWN;
2200                 lec_arp_add(priv, entry);
2201                 /* Temporary, changes before end of function */
2202         }
2203         memcpy(entry->atm_addr, atm_addr, ATM_ESA_LEN);
2204         del_timer(&entry->timer);
2205         for (i = 0; i < LEC_ARP_TABLE_SIZE; i++) {
2206                 for (tmp = priv->lec_arp_tables[i]; tmp; tmp = tmp->next) {
2207                         if (entry != tmp &&
2208                             !memcmp(tmp->atm_addr, atm_addr, ATM_ESA_LEN)) {
2209                                 /* Vcc to this host exists */
2210                                 if (tmp->status > ESI_VC_PENDING) {
2211                                         /*
2212                                          * ESI_FLUSH_PENDING,
2213                                          * ESI_FORWARD_DIRECT
2214                                          */
2215                                         entry->vcc = tmp->vcc;
2216                                         entry->old_push = tmp->old_push;
2217                                 }
2218                                 entry->status = tmp->status;
2219                                 break;
2220                         }
2221                 }
2222         }
2223         if (remoteflag)
2224                 entry->flags |= LEC_REMOTE_FLAG;
2225         else
2226                 entry->flags &= ~LEC_REMOTE_FLAG;
2227         if (entry->status == ESI_ARP_PENDING || entry->status == ESI_UNKNOWN) {
2228                 entry->status = ESI_VC_PENDING;
2229                 send_to_lecd(priv, l_svc_setup, entry->mac_addr, atm_addr,
2230                              NULL);
2231         }
2232         DPRINTK("After update2\n");
2233         dump_arp_table(priv);
2234 out:
2235         spin_unlock_irqrestore(&priv->lec_arp_lock, flags);
2236 }
2237
2238 /*
2239  * Notifies: Vcc setup ready
2240  */
2241 static void
2242 lec_vcc_added(struct lec_priv *priv, struct atmlec_ioc *ioc_data,
2243               struct atm_vcc *vcc,
2244               void (*old_push) (struct atm_vcc *vcc, struct sk_buff *skb))
2245 {
2246         unsigned long flags;
2247         struct lec_arp_table *entry;
2248         int i, found_entry = 0;
2249
2250         spin_lock_irqsave(&priv->lec_arp_lock, flags);
2251         if (ioc_data->receive == 2) {
2252                 /* Vcc for Multicast Forward. No timer, LANEv2 7.1.20 and 2.3.5.3 */
2253
2254                 DPRINTK("LEC_ARP: Attaching mcast forward\n");
2255 #if 0
2256                 entry = lec_arp_find(priv, bus_mac);
2257                 if (!entry) {
2258                         printk("LEC_ARP: Multicast entry not found!\n");
2259                         goto out;
2260                 }
2261                 memcpy(entry->atm_addr, ioc_data->atm_addr, ATM_ESA_LEN);
2262                 entry->recv_vcc = vcc;
2263                 entry->old_recv_push = old_push;
2264 #endif
2265                 entry = make_entry(priv, bus_mac);
2266                 if (entry == NULL)
2267                         goto out;
2268                 del_timer(&entry->timer);
2269                 memcpy(entry->atm_addr, ioc_data->atm_addr, ATM_ESA_LEN);
2270                 entry->recv_vcc = vcc;
2271                 entry->old_recv_push = old_push;
2272                 entry->next = priv->mcast_fwds;
2273                 priv->mcast_fwds = entry;
2274                 goto out;
2275         } else if (ioc_data->receive == 1) {
2276                 /*
2277                  * Vcc which we don't want to make default vcc,
2278                  * attach it anyway.
2279                  */
2280                 DPRINTK
2281                     ("LEC_ARP:Attaching data direct, not default: "
2282                      "%2.2x%2.2x%2.2x%2.2x%2.2x%2.2x%2.2x%2.2x%2.2x%2.2x%2.2x%2.2x%2.2x%2.2x%2.2x%2.2x%2.2x%2.2x%2.2x%2.2x\n",
2283                      ioc_data->atm_addr[0], ioc_data->atm_addr[1],
2284                      ioc_data->atm_addr[2], ioc_data->atm_addr[3],
2285                      ioc_data->atm_addr[4], ioc_data->atm_addr[5],
2286                      ioc_data->atm_addr[6], ioc_data->atm_addr[7],
2287                      ioc_data->atm_addr[8], ioc_data->atm_addr[9],
2288                      ioc_data->atm_addr[10], ioc_data->atm_addr[11],
2289                      ioc_data->atm_addr[12], ioc_data->atm_addr[13],
2290                      ioc_data->atm_addr[14], ioc_data->atm_addr[15],
2291                      ioc_data->atm_addr[16], ioc_data->atm_addr[17],
2292                      ioc_data->atm_addr[18], ioc_data->atm_addr[19]);
2293                 entry = make_entry(priv, bus_mac);
2294                 if (entry == NULL)
2295                         goto out;
2296                 memcpy(entry->atm_addr, ioc_data->atm_addr, ATM_ESA_LEN);
2297                 memset(entry->mac_addr, 0, ETH_ALEN);
2298                 entry->recv_vcc = vcc;
2299                 entry->old_recv_push = old_push;
2300                 entry->status = ESI_UNKNOWN;
2301                 entry->timer.expires = jiffies + priv->vcc_timeout_period;
2302                 entry->timer.function = lec_arp_expire_vcc;
2303                 add_timer(&entry->timer);
2304                 entry->next = priv->lec_no_forward;
2305                 priv->lec_no_forward = entry;
2306                 dump_arp_table(priv);
2307                 goto out;
2308         }
2309         DPRINTK
2310             ("LEC_ARP:Attaching data direct, default: "
2311              "%2.2x%2.2x%2.2x%2.2x%2.2x%2.2x%2.2x%2.2x%2.2x%2.2x%2.2x%2.2x%2.2x%2.2x%2.2x%2.2x%2.2x%2.2x%2.2x%2.2x\n",
2312              ioc_data->atm_addr[0], ioc_data->atm_addr[1],
2313              ioc_data->atm_addr[2], ioc_data->atm_addr[3],
2314              ioc_data->atm_addr[4], ioc_data->atm_addr[5],
2315              ioc_data->atm_addr[6], ioc_data->atm_addr[7],
2316              ioc_data->atm_addr[8], ioc_data->atm_addr[9],
2317              ioc_data->atm_addr[10], ioc_data->atm_addr[11],
2318              ioc_data->atm_addr[12], ioc_data->atm_addr[13],
2319              ioc_data->atm_addr[14], ioc_data->atm_addr[15],
2320              ioc_data->atm_addr[16], ioc_data->atm_addr[17],
2321              ioc_data->atm_addr[18], ioc_data->atm_addr[19]);
2322         for (i = 0; i < LEC_ARP_TABLE_SIZE; i++) {
2323                 for (entry = priv->lec_arp_tables[i]; entry;
2324                      entry = entry->next) {
2325                         if (memcmp
2326                             (ioc_data->atm_addr, entry->atm_addr,
2327                              ATM_ESA_LEN) == 0) {
2328                                 DPRINTK("LEC_ARP: Attaching data direct\n");
2329                                 DPRINTK("Currently -> Vcc: %d, Rvcc:%d\n",
2330                                         entry->vcc ? entry->vcc->vci : 0,
2331                                         entry->recv_vcc ? entry->recv_vcc->
2332                                         vci : 0);
2333                                 found_entry = 1;
2334                                 del_timer(&entry->timer);
2335                                 entry->vcc = vcc;
2336                                 entry->old_push = old_push;
2337                                 if (entry->status == ESI_VC_PENDING) {
2338                                         if (priv->maximum_unknown_frame_count
2339                                             == 0)
2340                                                 entry->status =
2341                                                     ESI_FORWARD_DIRECT;
2342                                         else {
2343                                                 entry->timestamp = jiffies;
2344                                                 entry->status =
2345                                                     ESI_FLUSH_PENDING;
2346 #if 0
2347                                                 send_to_lecd(priv, l_flush_xmt,
2348                                                              NULL,
2349                                                              entry->atm_addr,
2350                                                              NULL);
2351 #endif
2352                                         }
2353                                 } else {
2354                                         /*
2355                                          * They were forming a connection
2356                                          * to us, and we to them. Our
2357                                          * ATM address is numerically lower
2358                                          * than theirs, so we make connection
2359                                          * we formed into default VCC (8.1.11).
2360                                          * Connection they made gets torn
2361                                          * down. This might confuse some
2362                                          * clients. Can be changed if
2363                                          * someone reports trouble...
2364                                          */
2365                                         ;
2366                                 }
2367                         }
2368                 }
2369         }
2370         if (found_entry) {
2371                 DPRINTK("After vcc was added\n");
2372                 dump_arp_table(priv);
2373                 goto out;
2374         }
2375         /*
2376          * Not found, snatch address from first data packet that arrives
2377          * from this vcc
2378          */
2379         entry = make_entry(priv, bus_mac);
2380         if (!entry)
2381                 goto out;
2382         entry->vcc = vcc;
2383         entry->old_push = old_push;
2384         memcpy(entry->atm_addr, ioc_data->atm_addr, ATM_ESA_LEN);
2385         memset(entry->mac_addr, 0, ETH_ALEN);
2386         entry->status = ESI_UNKNOWN;
2387         entry->next = priv->lec_arp_empty_ones;
2388         priv->lec_arp_empty_ones = entry;
2389         entry->timer.expires = jiffies + priv->vcc_timeout_period;
2390         entry->timer.function = lec_arp_expire_vcc;
2391         add_timer(&entry->timer);
2392         DPRINTK("After vcc was added\n");
2393         dump_arp_table(priv);
2394 out:
2395         spin_unlock_irqrestore(&priv->lec_arp_lock, flags);
2396 }
2397
2398 static void lec_flush_complete(struct lec_priv *priv, unsigned long tran_id)
2399 {
2400         unsigned long flags;
2401         struct lec_arp_table *entry;
2402         int i;
2403
2404         DPRINTK("LEC:lec_flush_complete %lx\n", tran_id);
2405         spin_lock_irqsave(&priv->lec_arp_lock, flags);
2406         for (i = 0; i < LEC_ARP_TABLE_SIZE; i++) {
2407                 for (entry = priv->lec_arp_tables[i]; entry;
2408                      entry = entry->next) {
2409                         if (entry->flush_tran_id == tran_id
2410                             && entry->status == ESI_FLUSH_PENDING) {
2411                                 struct sk_buff *skb;
2412
2413                                 while ((skb =
2414                                         skb_dequeue(&entry->tx_wait)) != NULL)
2415                                         lec_send(entry->vcc, skb, entry->priv);
2416                                 entry->status = ESI_FORWARD_DIRECT;
2417                                 DPRINTK("LEC_ARP: Flushed\n");
2418                         }
2419                 }
2420         }
2421         spin_unlock_irqrestore(&priv->lec_arp_lock, flags);
2422         dump_arp_table(priv);
2423 }
2424
2425 static void
2426 lec_set_flush_tran_id(struct lec_priv *priv,
2427                       unsigned char *atm_addr, unsigned long tran_id)
2428 {
2429         unsigned long flags;
2430         struct lec_arp_table *entry;
2431         int i;
2432
2433         spin_lock_irqsave(&priv->lec_arp_lock, flags);
2434         for (i = 0; i < LEC_ARP_TABLE_SIZE; i++)
2435                 for (entry = priv->lec_arp_tables[i]; entry;
2436                      entry = entry->next)
2437                         if (!memcmp(atm_addr, entry->atm_addr, ATM_ESA_LEN)) {
2438                                 entry->flush_tran_id = tran_id;
2439                                 DPRINTK
2440                                     ("Set flush transaction id to %lx for %p\n",
2441                                      tran_id, entry);
2442                         }
2443         spin_unlock_irqrestore(&priv->lec_arp_lock, flags);
2444 }
2445
2446 static int lec_mcast_make(struct lec_priv *priv, struct atm_vcc *vcc)
2447 {
2448         unsigned long flags;
2449         unsigned char mac_addr[] = {
2450                 0xff, 0xff, 0xff, 0xff, 0xff, 0xff
2451         };
2452         struct lec_arp_table *to_add;
2453         struct lec_vcc_priv *vpriv;
2454         int err = 0;
2455
2456         if (!(vpriv = kmalloc(sizeof(struct lec_vcc_priv), GFP_KERNEL)))
2457                 return -ENOMEM;
2458         vpriv->xoff = 0;
2459         vpriv->old_pop = vcc->pop;
2460         vcc->user_back = vpriv;
2461         vcc->pop = lec_pop;
2462         spin_lock_irqsave(&priv->lec_arp_lock, flags);
2463         to_add = make_entry(priv, mac_addr);
2464         if (!to_add) {
2465                 vcc->pop = vpriv->old_pop;
2466                 kfree(vpriv);
2467                 err = -ENOMEM;
2468                 goto out;
2469         }
2470         memcpy(to_add->atm_addr, vcc->remote.sas_addr.prv, ATM_ESA_LEN);
2471         to_add->status = ESI_FORWARD_DIRECT;
2472         to_add->flags |= LEC_PERMANENT_FLAG;
2473         to_add->vcc = vcc;
2474         to_add->old_push = vcc->push;
2475         vcc->push = lec_push;
2476         priv->mcast_vcc = vcc;
2477         lec_arp_add(priv, to_add);
2478 out:
2479         spin_unlock_irqrestore(&priv->lec_arp_lock, flags);
2480         return err;
2481 }
2482
2483 static void lec_vcc_close(struct lec_priv *priv, struct atm_vcc *vcc)
2484 {
2485         unsigned long flags;
2486         struct lec_arp_table *entry, *next;
2487         int i;
2488
2489         DPRINTK("LEC_ARP: lec_vcc_close vpi:%d vci:%d\n", vcc->vpi, vcc->vci);
2490         dump_arp_table(priv);
2491         spin_lock_irqsave(&priv->lec_arp_lock, flags);
2492         for (i = 0; i < LEC_ARP_TABLE_SIZE; i++) {
2493                 for (entry = priv->lec_arp_tables[i]; entry; entry = next) {
2494                         next = entry->next;
2495                         if (vcc == entry->vcc) {
2496                                 lec_arp_remove(priv, entry);
2497                                 kfree(entry);
2498                                 if (priv->mcast_vcc == vcc) {
2499                                         priv->mcast_vcc = NULL;
2500                                 }
2501                         }
2502                 }
2503         }
2504
2505         entry = priv->lec_arp_empty_ones;
2506         priv->lec_arp_empty_ones = NULL;
2507         while (entry != NULL) {
2508                 next = entry->next;
2509                 if (entry->vcc == vcc) {        /* leave it out from the list */
2510                         lec_arp_clear_vccs(entry);
2511                         del_timer(&entry->timer);
2512                         kfree(entry);
2513                 } else {                        /* put it back to the list */
2514                         entry->next = priv->lec_arp_empty_ones;
2515                         priv->lec_arp_empty_ones = entry;
2516                 }
2517                 entry = next;
2518         }
2519
2520         entry = priv->lec_no_forward;
2521         priv->lec_no_forward = NULL;
2522         while (entry != NULL) {
2523                 next = entry->next;
2524                 if (entry->recv_vcc == vcc) {
2525                         lec_arp_clear_vccs(entry);
2526                         del_timer(&entry->timer);
2527                         kfree(entry);
2528                 } else {
2529                         entry->next = priv->lec_no_forward;
2530                         priv->lec_no_forward = entry;
2531                 }
2532                 entry = next;
2533         }
2534
2535         entry = priv->mcast_fwds;
2536         priv->mcast_fwds = NULL;
2537         while (entry != NULL) {
2538                 next = entry->next;
2539                 if (entry->recv_vcc == vcc) {
2540                         lec_arp_clear_vccs(entry);
2541                         /* No timer, LANEv2 7.1.20 and 2.3.5.3 */
2542                         kfree(entry);
2543                 } else {
2544                         entry->next = priv->mcast_fwds;
2545                         priv->mcast_fwds = entry;
2546                 }
2547                 entry = next;
2548         }
2549
2550         spin_unlock_irqrestore(&priv->lec_arp_lock, flags);
2551         dump_arp_table(priv);
2552 }
2553
2554 static void
2555 lec_arp_check_empties(struct lec_priv *priv,
2556                       struct atm_vcc *vcc, struct sk_buff *skb)
2557 {
2558         unsigned long flags;
2559         struct lec_arp_table *entry, *prev;
2560         struct lecdatahdr_8023 *hdr = (struct lecdatahdr_8023 *)skb->data;
2561         unsigned char *src;
2562 #ifdef CONFIG_TR
2563         struct lecdatahdr_8025 *tr_hdr = (struct lecdatahdr_8025 *)skb->data;
2564
2565         if (priv->is_trdev)
2566                 src = tr_hdr->h_source;
2567         else
2568 #endif
2569                 src = hdr->h_source;
2570
2571         spin_lock_irqsave(&priv->lec_arp_lock, flags);
2572         entry = priv->lec_arp_empty_ones;
2573         if (vcc == entry->vcc) {
2574                 del_timer(&entry->timer);
2575                 memcpy(entry->mac_addr, src, ETH_ALEN);
2576                 entry->status = ESI_FORWARD_DIRECT;
2577                 entry->last_used = jiffies;
2578                 priv->lec_arp_empty_ones = entry->next;
2579                 /* We might have got an entry */
2580                 if ((prev = lec_arp_find(priv, src))) {
2581                         lec_arp_remove(priv, prev);
2582                         kfree(prev);
2583                 }
2584                 lec_arp_add(priv, entry);
2585                 goto out;
2586         }
2587         prev = entry;
2588         entry = entry->next;
2589         while (entry && entry->vcc != vcc) {
2590                 prev = entry;
2591                 entry = entry->next;
2592         }
2593         if (!entry) {
2594                 DPRINTK("LEC_ARP: Arp_check_empties: entry not found!\n");
2595                 goto out;
2596         }
2597         del_timer(&entry->timer);
2598         memcpy(entry->mac_addr, src, ETH_ALEN);
2599         entry->status = ESI_FORWARD_DIRECT;
2600         entry->last_used = jiffies;
2601         prev->next = entry->next;
2602         if ((prev = lec_arp_find(priv, src))) {
2603                 lec_arp_remove(priv, prev);
2604                 kfree(prev);
2605         }
2606         lec_arp_add(priv, entry);
2607 out:
2608         spin_unlock_irqrestore(&priv->lec_arp_lock, flags);
2609 }
2610
2611 MODULE_LICENSE("GPL");