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-rw-r--r--net/atm/lec.c2538
1 files changed, 2538 insertions, 0 deletions
diff --git a/net/atm/lec.c b/net/atm/lec.c
new file mode 100644
index 0000000..a075248
--- /dev/null
+++ b/net/atm/lec.c
@@ -0,0 +1,2538 @@
+/*
+ * lec.c: Lan Emulation driver
+ * Marko Kiiskila mkiiskila@yahoo.com
+ *
+ */
+
+#include <linux/config.h>
+#include <linux/kernel.h>
+#include <linux/bitops.h>
+
+/* We are ethernet device */
+#include <linux/if_ether.h>
+#include <linux/netdevice.h>
+#include <linux/etherdevice.h>
+#include <net/sock.h>
+#include <linux/skbuff.h>
+#include <linux/ip.h>
+#include <asm/byteorder.h>
+#include <asm/uaccess.h>
+#include <net/arp.h>
+#include <net/dst.h>
+#include <linux/proc_fs.h>
+#include <linux/spinlock.h>
+#include <linux/proc_fs.h>
+#include <linux/seq_file.h>
+
+/* TokenRing if needed */
+#ifdef CONFIG_TR
+#include <linux/trdevice.h>
+#endif
+
+/* And atm device */
+#include <linux/atmdev.h>
+#include <linux/atmlec.h>
+
+/* Proxy LEC knows about bridging */
+#if defined(CONFIG_BRIDGE) || defined(CONFIG_BRIDGE_MODULE)
+#include <linux/if_bridge.h>
+#include "../bridge/br_private.h"
+
+static unsigned char bridge_ula_lec[] = {0x01, 0x80, 0xc2, 0x00, 0x00};
+#endif
+
+/* Modular too */
+#include <linux/module.h>
+#include <linux/init.h>
+
+#include "lec.h"
+#include "lec_arpc.h"
+#include "resources.h"
+
+#if 0
+#define DPRINTK printk
+#else
+#define DPRINTK(format,args...)
+#endif
+
+#define DUMP_PACKETS 0 /* 0 = None,
+ * 1 = 30 first bytes
+ * 2 = Whole packet
+ */
+
+#define LEC_UNRES_QUE_LEN 8 /* number of tx packets to queue for a
+ single destination while waiting for SVC */
+
+static int lec_open(struct net_device *dev);
+static int lec_start_xmit(struct sk_buff *skb, struct net_device *dev);
+static int lec_close(struct net_device *dev);
+static struct net_device_stats *lec_get_stats(struct net_device *dev);
+static void lec_init(struct net_device *dev);
+static struct lec_arp_table* lec_arp_find(struct lec_priv *priv,
+ unsigned char *mac_addr);
+static int lec_arp_remove(struct lec_priv *priv,
+ struct lec_arp_table *to_remove);
+/* LANE2 functions */
+static void lane2_associate_ind (struct net_device *dev, u8 *mac_address,
+ u8 *tlvs, u32 sizeoftlvs);
+static int lane2_resolve(struct net_device *dev, u8 *dst_mac, int force,
+ u8 **tlvs, u32 *sizeoftlvs);
+static int lane2_associate_req (struct net_device *dev, u8 *lan_dst,
+ u8 *tlvs, u32 sizeoftlvs);
+
+static int lec_addr_delete(struct lec_priv *priv, unsigned char *atm_addr,
+ unsigned long permanent);
+static void lec_arp_check_empties(struct lec_priv *priv,
+ struct atm_vcc *vcc, struct sk_buff *skb);
+static void lec_arp_destroy(struct lec_priv *priv);
+static void lec_arp_init(struct lec_priv *priv);
+static struct atm_vcc* lec_arp_resolve(struct lec_priv *priv,
+ unsigned char *mac_to_find,
+ int is_rdesc,
+ struct lec_arp_table **ret_entry);
+static void lec_arp_update(struct lec_priv *priv, unsigned char *mac_addr,
+ unsigned char *atm_addr, unsigned long remoteflag,
+ unsigned int targetless_le_arp);
+static void lec_flush_complete(struct lec_priv *priv, unsigned long tran_id);
+static int lec_mcast_make(struct lec_priv *priv, struct atm_vcc *vcc);
+static void lec_set_flush_tran_id(struct lec_priv *priv,
+ unsigned char *atm_addr,
+ unsigned long tran_id);
+static void lec_vcc_added(struct lec_priv *priv, struct atmlec_ioc *ioc_data,
+ struct atm_vcc *vcc,
+ void (*old_push)(struct atm_vcc *vcc, struct sk_buff *skb));
+static void lec_vcc_close(struct lec_priv *priv, struct atm_vcc *vcc);
+
+static struct lane2_ops lane2_ops = {
+ lane2_resolve, /* resolve, spec 3.1.3 */
+ lane2_associate_req, /* associate_req, spec 3.1.4 */
+ NULL /* associate indicator, spec 3.1.5 */
+};
+
+static unsigned char bus_mac[ETH_ALEN] = {0xff,0xff,0xff,0xff,0xff,0xff};
+
+/* Device structures */
+static struct net_device *dev_lec[MAX_LEC_ITF];
+
+#if defined(CONFIG_BRIDGE) || defined(CONFIG_BRIDGE_MODULE)
+static void lec_handle_bridge(struct sk_buff *skb, struct net_device *dev)
+{
+ struct ethhdr *eth;
+ char *buff;
+ struct lec_priv *priv;
+
+ /* Check if this is a BPDU. If so, ask zeppelin to send
+ * LE_TOPOLOGY_REQUEST with the same value of Topology Change bit
+ * as the Config BPDU has */
+ eth = (struct ethhdr *)skb->data;
+ buff = skb->data + skb->dev->hard_header_len;
+ if (*buff++ == 0x42 && *buff++ == 0x42 && *buff++ == 0x03) {
+ struct sock *sk;
+ struct sk_buff *skb2;
+ struct atmlec_msg *mesg;
+
+ skb2 = alloc_skb(sizeof(struct atmlec_msg), GFP_ATOMIC);
+ if (skb2 == NULL) return;
+ skb2->len = sizeof(struct atmlec_msg);
+ mesg = (struct atmlec_msg *)skb2->data;
+ mesg->type = l_topology_change;
+ buff += 4;
+ mesg->content.normal.flag = *buff & 0x01; /* 0x01 is topology change */
+
+ priv = (struct lec_priv *)dev->priv;
+ atm_force_charge(priv->lecd, skb2->truesize);
+ sk = sk_atm(priv->lecd);
+ skb_queue_tail(&sk->sk_receive_queue, skb2);
+ sk->sk_data_ready(sk, skb2->len);
+ }
+
+ return;
+}
+#endif /* defined(CONFIG_BRIDGE) || defined(CONFIG_BRIDGE_MODULE) */
+
+/*
+ * Modelled after tr_type_trans
+ * All multicast and ARE or STE frames go to BUS.
+ * Non source routed frames go by destination address.
+ * Last hop source routed frames go by destination address.
+ * Not last hop source routed frames go by _next_ route descriptor.
+ * Returns pointer to destination MAC address or fills in rdesc
+ * and returns NULL.
+ */
+#ifdef CONFIG_TR
+static unsigned char *get_tr_dst(unsigned char *packet, unsigned char *rdesc)
+{
+ struct trh_hdr *trh;
+ int riflen, num_rdsc;
+
+ trh = (struct trh_hdr *)packet;
+ if (trh->daddr[0] & (uint8_t)0x80)
+ return bus_mac; /* multicast */
+
+ if (trh->saddr[0] & TR_RII) {
+ riflen = (ntohs(trh->rcf) & TR_RCF_LEN_MASK) >> 8;
+ if ((ntohs(trh->rcf) >> 13) != 0)
+ return bus_mac; /* ARE or STE */
+ }
+ else
+ return trh->daddr; /* not source routed */
+
+ if (riflen < 6)
+ return trh->daddr; /* last hop, source routed */
+
+ /* riflen is 6 or more, packet has more than one route descriptor */
+ num_rdsc = (riflen/2) - 1;
+ memset(rdesc, 0, ETH_ALEN);
+ /* offset 4 comes from LAN destination field in LE control frames */
+ if (trh->rcf & htons((uint16_t)TR_RCF_DIR_BIT))
+ memcpy(&rdesc[4], &trh->rseg[num_rdsc-2], sizeof(uint16_t));
+ else {
+ memcpy(&rdesc[4], &trh->rseg[1], sizeof(uint16_t));
+ rdesc[5] = ((ntohs(trh->rseg[0]) & 0x000f) | (rdesc[5] & 0xf0));
+ }
+
+ return NULL;
+}
+#endif /* CONFIG_TR */
+
+/*
+ * Open/initialize the netdevice. This is called (in the current kernel)
+ * sometime after booting when the 'ifconfig' program is run.
+ *
+ * This routine should set everything up anew at each open, even
+ * registers that "should" only need to be set once at boot, so that
+ * there is non-reboot way to recover if something goes wrong.
+ */
+
+static int
+lec_open(struct net_device *dev)
+{
+ struct lec_priv *priv = (struct lec_priv *)dev->priv;
+
+ netif_start_queue(dev);
+ memset(&priv->stats,0,sizeof(struct net_device_stats));
+
+ return 0;
+}
+
+static __inline__ void
+lec_send(struct atm_vcc *vcc, struct sk_buff *skb, struct lec_priv *priv)
+{
+ ATM_SKB(skb)->vcc = vcc;
+ ATM_SKB(skb)->atm_options = vcc->atm_options;
+
+ atomic_add(skb->truesize, &sk_atm(vcc)->sk_wmem_alloc);
+ if (vcc->send(vcc, skb) < 0) {
+ priv->stats.tx_dropped++;
+ return;
+ }
+
+ priv->stats.tx_packets++;
+ priv->stats.tx_bytes += skb->len;
+}
+
+static void
+lec_tx_timeout(struct net_device *dev)
+{
+ printk(KERN_INFO "%s: tx timeout\n", dev->name);
+ dev->trans_start = jiffies;
+ netif_wake_queue(dev);
+}
+
+static int
+lec_start_xmit(struct sk_buff *skb, struct net_device *dev)
+{
+ struct sk_buff *skb2;
+ struct lec_priv *priv = (struct lec_priv *)dev->priv;
+ struct lecdatahdr_8023 *lec_h;
+ struct atm_vcc *vcc;
+ struct lec_arp_table *entry;
+ unsigned char *dst;
+ int min_frame_size;
+#ifdef CONFIG_TR
+ unsigned char rdesc[ETH_ALEN]; /* Token Ring route descriptor */
+#endif
+ int is_rdesc;
+#if DUMP_PACKETS > 0
+ char buf[300];
+ int i=0;
+#endif /* DUMP_PACKETS >0 */
+
+ DPRINTK("lec_start_xmit called\n");
+ if (!priv->lecd) {
+ printk("%s:No lecd attached\n",dev->name);
+ priv->stats.tx_errors++;
+ netif_stop_queue(dev);
+ return -EUNATCH;
+ }
+
+ DPRINTK("skbuff head:%lx data:%lx tail:%lx end:%lx\n",
+ (long)skb->head, (long)skb->data, (long)skb->tail,
+ (long)skb->end);
+#if defined(CONFIG_BRIDGE) || defined(CONFIG_BRIDGE_MODULE)
+ if (memcmp(skb->data, bridge_ula_lec, sizeof(bridge_ula_lec)) == 0)
+ lec_handle_bridge(skb, dev);
+#endif
+
+ /* Make sure we have room for lec_id */
+ if (skb_headroom(skb) < 2) {
+
+ DPRINTK("lec_start_xmit: reallocating skb\n");
+ skb2 = skb_realloc_headroom(skb, LEC_HEADER_LEN);
+ kfree_skb(skb);
+ if (skb2 == NULL) return 0;
+ skb = skb2;
+ }
+ skb_push(skb, 2);
+
+ /* Put le header to place, works for TokenRing too */
+ lec_h = (struct lecdatahdr_8023*)skb->data;
+ lec_h->le_header = htons(priv->lecid);
+
+#ifdef CONFIG_TR
+ /* Ugly. Use this to realign Token Ring packets for
+ * e.g. PCA-200E driver. */
+ if (priv->is_trdev) {
+ skb2 = skb_realloc_headroom(skb, LEC_HEADER_LEN);
+ kfree_skb(skb);
+ if (skb2 == NULL) return 0;
+ skb = skb2;
+ }
+#endif
+
+#if DUMP_PACKETS > 0
+ printk("%s: send datalen:%ld lecid:%4.4x\n", dev->name,
+ skb->len, priv->lecid);
+#if DUMP_PACKETS >= 2
+ for(i=0;i<skb->len && i <99;i++) {
+ sprintf(buf+i*3,"%2.2x ",0xff&skb->data[i]);
+ }
+#elif DUMP_PACKETS >= 1
+ for(i=0;i<skb->len && i < 30;i++) {
+ sprintf(buf+i*3,"%2.2x ", 0xff&skb->data[i]);
+ }
+#endif /* DUMP_PACKETS >= 1 */
+ if (i==skb->len)
+ printk("%s\n",buf);
+ else
+ printk("%s...\n",buf);
+#endif /* DUMP_PACKETS > 0 */
+
+ /* Minimum ethernet-frame size */
+#ifdef CONFIG_TR
+ if (priv->is_trdev)
+ min_frame_size = LEC_MINIMUM_8025_SIZE;
+ else
+#endif
+ min_frame_size = LEC_MINIMUM_8023_SIZE;
+ if (skb->len < min_frame_size) {
+ if ((skb->len + skb_tailroom(skb)) < min_frame_size) {
+ skb2 = skb_copy_expand(skb, 0,
+ min_frame_size - skb->truesize, GFP_ATOMIC);
+ dev_kfree_skb(skb);
+ if (skb2 == NULL) {
+ priv->stats.tx_dropped++;
+ return 0;
+ }
+ skb = skb2;
+ }
+ skb_put(skb, min_frame_size - skb->len);
+ }
+
+ /* Send to right vcc */
+ is_rdesc = 0;
+ dst = lec_h->h_dest;
+#ifdef CONFIG_TR
+ if (priv->is_trdev) {
+ dst = get_tr_dst(skb->data+2, rdesc);
+ if (dst == NULL) {
+ dst = rdesc;
+ is_rdesc = 1;
+ }
+ }
+#endif
+ entry = NULL;
+ vcc = lec_arp_resolve(priv, dst, is_rdesc, &entry);
+ DPRINTK("%s:vcc:%p vcc_flags:%x, entry:%p\n", dev->name,
+ vcc, vcc?vcc->flags:0, entry);
+ if (!vcc || !test_bit(ATM_VF_READY,&vcc->flags)) {
+ if (entry && (entry->tx_wait.qlen < LEC_UNRES_QUE_LEN)) {
+ DPRINTK("%s:lec_start_xmit: queuing packet, ", dev->name);
+ DPRINTK("MAC address 0x%02x:%02x:%02x:%02x:%02x:%02x\n",
+ lec_h->h_dest[0], lec_h->h_dest[1], lec_h->h_dest[2],
+ lec_h->h_dest[3], lec_h->h_dest[4], lec_h->h_dest[5]);
+ skb_queue_tail(&entry->tx_wait, skb);
+ } else {
+ DPRINTK("%s:lec_start_xmit: tx queue full or no arp entry, dropping, ", dev->name);
+ DPRINTK("MAC address 0x%02x:%02x:%02x:%02x:%02x:%02x\n",
+ lec_h->h_dest[0], lec_h->h_dest[1], lec_h->h_dest[2],
+ lec_h->h_dest[3], lec_h->h_dest[4], lec_h->h_dest[5]);
+ priv->stats.tx_dropped++;
+ dev_kfree_skb(skb);
+ }
+ return 0;
+ }
+
+#if DUMP_PACKETS > 0
+ printk("%s:sending to vpi:%d vci:%d\n", dev->name,
+ vcc->vpi, vcc->vci);
+#endif /* DUMP_PACKETS > 0 */
+
+ while (entry && (skb2 = skb_dequeue(&entry->tx_wait))) {
+ DPRINTK("lec.c: emptying tx queue, ");
+ DPRINTK("MAC address 0x%02x:%02x:%02x:%02x:%02x:%02x\n",
+ lec_h->h_dest[0], lec_h->h_dest[1], lec_h->h_dest[2],
+ lec_h->h_dest[3], lec_h->h_dest[4], lec_h->h_dest[5]);
+ lec_send(vcc, skb2, priv);
+ }
+
+ lec_send(vcc, skb, priv);
+
+ if (!atm_may_send(vcc, 0)) {
+ struct lec_vcc_priv *vpriv = LEC_VCC_PRIV(vcc);
+
+ vpriv->xoff = 1;
+ netif_stop_queue(dev);
+
+ /*
+ * vcc->pop() might have occurred in between, making
+ * the vcc usuable again. Since xmit is serialized,
+ * this is the only situation we have to re-test.
+ */
+
+ if (atm_may_send(vcc, 0))
+ netif_wake_queue(dev);
+ }
+
+ dev->trans_start = jiffies;
+ return 0;
+}
+
+/* The inverse routine to net_open(). */
+static int
+lec_close(struct net_device *dev)
+{
+ netif_stop_queue(dev);
+ return 0;
+}
+
+/*
+ * Get the current statistics.
+ * This may be called with the card open or closed.
+ */
+static struct net_device_stats *
+lec_get_stats(struct net_device *dev)
+{
+ return &((struct lec_priv *)dev->priv)->stats;
+}
+
+static int
+lec_atm_send(struct atm_vcc *vcc, struct sk_buff *skb)
+{
+ unsigned long flags;
+ struct net_device *dev = (struct net_device*)vcc->proto_data;
+ struct lec_priv *priv = (struct lec_priv*)dev->priv;
+ struct atmlec_msg *mesg;
+ struct lec_arp_table *entry;
+ int i;
+ char *tmp; /* FIXME */
+
+ atomic_sub(skb->truesize, &sk_atm(vcc)->sk_wmem_alloc);
+ mesg = (struct atmlec_msg *)skb->data;
+ tmp = skb->data;
+ tmp += sizeof(struct atmlec_msg);
+ DPRINTK("%s: msg from zeppelin:%d\n", dev->name, mesg->type);
+ switch(mesg->type) {
+ case l_set_mac_addr:
+ for (i=0;i<6;i++) {
+ dev->dev_addr[i] = mesg->content.normal.mac_addr[i];
+ }
+ break;
+ case l_del_mac_addr:
+ for(i=0;i<6;i++) {
+ dev->dev_addr[i] = 0;
+ }
+ break;
+ case l_addr_delete:
+ lec_addr_delete(priv, mesg->content.normal.atm_addr,
+ mesg->content.normal.flag);
+ break;
+ case l_topology_change:
+ priv->topology_change = mesg->content.normal.flag;
+ break;
+ case l_flush_complete:
+ lec_flush_complete(priv, mesg->content.normal.flag);
+ break;
+ case l_narp_req: /* LANE2: see 7.1.35 in the lane2 spec */
+ spin_lock_irqsave(&priv->lec_arp_lock, flags);
+ entry = lec_arp_find(priv, mesg->content.normal.mac_addr);
+ lec_arp_remove(priv, entry);
+ spin_unlock_irqrestore(&priv->lec_arp_lock, flags);
+
+ if (mesg->content.normal.no_source_le_narp)
+ break;
+ /* FALL THROUGH */
+ case l_arp_update:
+ lec_arp_update(priv, mesg->content.normal.mac_addr,
+ mesg->content.normal.atm_addr,
+ mesg->content.normal.flag,
+ mesg->content.normal.targetless_le_arp);
+ DPRINTK("lec: in l_arp_update\n");
+ if (mesg->sizeoftlvs != 0) { /* LANE2 3.1.5 */
+ DPRINTK("lec: LANE2 3.1.5, got tlvs, size %d\n", mesg->sizeoftlvs);
+ lane2_associate_ind(dev,
+ mesg->content.normal.mac_addr,
+ tmp, mesg->sizeoftlvs);
+ }
+ break;
+ case l_config:
+ priv->maximum_unknown_frame_count =
+ mesg->content.config.maximum_unknown_frame_count;
+ priv->max_unknown_frame_time =
+ (mesg->content.config.max_unknown_frame_time*HZ);
+ priv->max_retry_count =
+ mesg->content.config.max_retry_count;
+ priv->aging_time = (mesg->content.config.aging_time*HZ);
+ priv->forward_delay_time =
+ (mesg->content.config.forward_delay_time*HZ);
+ priv->arp_response_time =
+ (mesg->content.config.arp_response_time*HZ);
+ priv->flush_timeout = (mesg->content.config.flush_timeout*HZ);
+ priv->path_switching_delay =
+ (mesg->content.config.path_switching_delay*HZ);
+ priv->lane_version = mesg->content.config.lane_version; /* LANE2 */
+ priv->lane2_ops = NULL;
+ if (priv->lane_version > 1)
+ priv->lane2_ops = &lane2_ops;
+ if (dev->change_mtu(dev, mesg->content.config.mtu))
+ printk("%s: change_mtu to %d failed\n", dev->name,
+ mesg->content.config.mtu);
+ priv->is_proxy = mesg->content.config.is_proxy;
+ break;
+ case l_flush_tran_id:
+ lec_set_flush_tran_id(priv, mesg->content.normal.atm_addr,
+ mesg->content.normal.flag);
+ break;
+ case l_set_lecid:
+ priv->lecid=(unsigned short)(0xffff&mesg->content.normal.flag);
+ break;
+ case l_should_bridge: {
+#if defined(CONFIG_BRIDGE) || defined(CONFIG_BRIDGE_MODULE)
+ struct net_bridge_fdb_entry *f;
+
+ DPRINTK("%s: bridge zeppelin asks about 0x%02x:%02x:%02x:%02x:%02x:%02x\n",
+ dev->name,
+ mesg->content.proxy.mac_addr[0], mesg->content.proxy.mac_addr[1],
+ mesg->content.proxy.mac_addr[2], mesg->content.proxy.mac_addr[3],
+ mesg->content.proxy.mac_addr[4], mesg->content.proxy.mac_addr[5]);
+
+ if (br_fdb_get_hook == NULL || dev->br_port == NULL)
+ break;
+
+ f = br_fdb_get_hook(dev->br_port->br, mesg->content.proxy.mac_addr);
+ if (f != NULL &&
+ f->dst->dev != dev &&
+ f->dst->state == BR_STATE_FORWARDING) {
+ /* hit from bridge table, send LE_ARP_RESPONSE */
+ struct sk_buff *skb2;
+ struct sock *sk;
+
+ DPRINTK("%s: entry found, responding to zeppelin\n", dev->name);
+ skb2 = alloc_skb(sizeof(struct atmlec_msg), GFP_ATOMIC);
+ if (skb2 == NULL) {
+ br_fdb_put_hook(f);
+ break;
+ }
+ skb2->len = sizeof(struct atmlec_msg);
+ memcpy(skb2->data, mesg, sizeof(struct atmlec_msg));
+ atm_force_charge(priv->lecd, skb2->truesize);
+ sk = sk_atm(priv->lecd);
+ skb_queue_tail(&sk->sk_receive_queue, skb2);
+ sk->sk_data_ready(sk, skb2->len);
+ }
+ if (f != NULL) br_fdb_put_hook(f);
+#endif /* defined(CONFIG_BRIDGE) || defined(CONFIG_BRIDGE_MODULE) */
+ }
+ break;
+ default:
+ printk("%s: Unknown message type %d\n", dev->name, mesg->type);
+ dev_kfree_skb(skb);
+ return -EINVAL;
+ }
+ dev_kfree_skb(skb);
+ return 0;
+}
+
+static void
+lec_atm_close(struct atm_vcc *vcc)
+{
+ struct sk_buff *skb;
+ struct net_device *dev = (struct net_device *)vcc->proto_data;
+ struct lec_priv *priv = (struct lec_priv *)dev->priv;
+
+ priv->lecd = NULL;
+ /* Do something needful? */
+
+ netif_stop_queue(dev);
+ lec_arp_destroy(priv);
+
+ if (skb_peek(&sk_atm(vcc)->sk_receive_queue))
+ printk("%s lec_atm_close: closing with messages pending\n",
+ dev->name);
+ while ((skb = skb_dequeue(&sk_atm(vcc)->sk_receive_queue)) != NULL) {
+ atm_return(vcc, skb->truesize);
+ dev_kfree_skb(skb);
+ }
+
+ printk("%s: Shut down!\n", dev->name);
+ module_put(THIS_MODULE);
+}
+
+static struct atmdev_ops lecdev_ops = {
+ .close = lec_atm_close,
+ .send = lec_atm_send
+};
+
+static struct atm_dev lecatm_dev = {
+ .ops = &lecdev_ops,
+ .type = "lec",
+ .number = 999, /* dummy device number */
+ .lock = SPIN_LOCK_UNLOCKED
+};
+
+/*
+ * LANE2: new argument struct sk_buff *data contains
+ * the LE_ARP based TLVs introduced in the LANE2 spec
+ */
+static int
+send_to_lecd(struct lec_priv *priv, atmlec_msg_type type,
+ unsigned char *mac_addr, unsigned char *atm_addr,
+ struct sk_buff *data)
+{
+ struct sock *sk;
+ struct sk_buff *skb;
+ struct atmlec_msg *mesg;
+
+ if (!priv || !priv->lecd) {
+ return -1;
+ }
+ skb = alloc_skb(sizeof(struct atmlec_msg), GFP_ATOMIC);
+ if (!skb)
+ return -1;
+ skb->len = sizeof(struct atmlec_msg);
+ mesg = (struct atmlec_msg *)skb->data;
+ memset(mesg, 0, sizeof(struct atmlec_msg));
+ mesg->type = type;
+ if (data != NULL)
+ mesg->sizeoftlvs = data->len;
+ if (mac_addr)
+ memcpy(&mesg->content.normal.mac_addr, mac_addr, ETH_ALEN);
+ else
+ mesg->content.normal.targetless_le_arp = 1;
+ if (atm_addr)
+ memcpy(&mesg->content.normal.atm_addr, atm_addr, ATM_ESA_LEN);
+
+ atm_force_charge(priv->lecd, skb->truesize);
+ sk = sk_atm(priv->lecd);
+ skb_queue_tail(&sk->sk_receive_queue, skb);
+ sk->sk_data_ready(sk, skb->len);
+
+ if (data != NULL) {
+ DPRINTK("lec: about to send %d bytes of data\n", data->len);
+ atm_force_charge(priv->lecd, data->truesize);
+ skb_queue_tail(&sk->sk_receive_queue, data);
+ sk->sk_data_ready(sk, skb->len);
+ }
+
+ return 0;
+}
+
+/* shamelessly stolen from drivers/net/net_init.c */
+static int lec_change_mtu(struct net_device *dev, int new_mtu)
+{
+ if ((new_mtu < 68) || (new_mtu > 18190))
+ return -EINVAL;
+ dev->mtu = new_mtu;
+ return 0;
+}
+
+static void lec_set_multicast_list(struct net_device *dev)
+{
+ /* by default, all multicast frames arrive over the bus.
+ * eventually support selective multicast service
+ */
+ return;
+}
+
+static void
+lec_init(struct net_device *dev)
+{
+ dev->change_mtu = lec_change_mtu;
+ dev->open = lec_open;
+ dev->stop = lec_close;
+ dev->hard_start_xmit = lec_start_xmit;
+ dev->tx_timeout = lec_tx_timeout;
+
+ dev->get_stats = lec_get_stats;
+ dev->set_multicast_list = lec_set_multicast_list;
+ dev->do_ioctl = NULL;
+ printk("%s: Initialized!\n",dev->name);
+ return;
+}
+
+static unsigned char lec_ctrl_magic[] = {
+ 0xff,
+ 0x00,
+ 0x01,
+ 0x01 };
+
+static void
+lec_push(struct atm_vcc *vcc, struct sk_buff *skb)
+{
+ struct net_device *dev = (struct net_device *)vcc->proto_data;
+ struct lec_priv *priv = (struct lec_priv *)dev->priv;
+
+#if DUMP_PACKETS >0
+ int i=0;
+ char buf[300];
+
+ printk("%s: lec_push vcc vpi:%d vci:%d\n", dev->name,
+ vcc->vpi, vcc->vci);
+#endif
+ if (!skb) {
+ DPRINTK("%s: null skb\n",dev->name);
+ lec_vcc_close(priv, vcc);
+ return;
+ }
+#if DUMP_PACKETS > 0
+ printk("%s: rcv datalen:%ld lecid:%4.4x\n", dev->name,
+ skb->len, priv->lecid);
+#if DUMP_PACKETS >= 2
+ for(i=0;i<skb->len && i <99;i++) {
+ sprintf(buf+i*3,"%2.2x ",0xff&skb->data[i]);
+ }
+#elif DUMP_PACKETS >= 1
+ for(i=0;i<skb->len && i < 30;i++) {
+ sprintf(buf+i*3,"%2.2x ", 0xff&skb->data[i]);
+ }
+#endif /* DUMP_PACKETS >= 1 */
+ if (i==skb->len)
+ printk("%s\n",buf);
+ else
+ printk("%s...\n",buf);
+#endif /* DUMP_PACKETS > 0 */
+ if (memcmp(skb->data, lec_ctrl_magic, 4) ==0) { /* Control frame, to daemon*/
+ struct sock *sk = sk_atm(vcc);
+
+ DPRINTK("%s: To daemon\n",dev->name);
+ skb_queue_tail(&sk->sk_receive_queue, skb);
+ sk->sk_data_ready(sk, skb->len);
+ } else { /* Data frame, queue to protocol handlers */
+ unsigned char *dst;
+
+ atm_return(vcc,skb->truesize);
+ if (*(uint16_t *)skb->data == htons(priv->lecid) ||
+ !priv->lecd ||
+ !(dev->flags & IFF_UP)) {
+ /* Probably looping back, or if lecd is missing,
+ lecd has gone down */
+ DPRINTK("Ignoring frame...\n");
+ dev_kfree_skb(skb);
+ return;
+ }
+#ifdef CONFIG_TR
+ if (priv->is_trdev) dst = ((struct lecdatahdr_8025 *)skb->data)->h_dest;
+ else
+#endif
+ dst = ((struct lecdatahdr_8023 *)skb->data)->h_dest;
+
+ if (!(dst[0]&0x01) && /* Never filter Multi/Broadcast */
+ !priv->is_proxy && /* Proxy wants all the packets */
+ memcmp(dst, dev->dev_addr, dev->addr_len)) {
+ dev_kfree_skb(skb);
+ return;
+ }
+ if (priv->lec_arp_empty_ones) {
+ lec_arp_check_empties(priv, vcc, skb);
+ }
+ skb->dev = dev;
+ skb_pull(skb, 2); /* skip lec_id */
+#ifdef CONFIG_TR
+ if (priv->is_trdev) skb->protocol = tr_type_trans(skb, dev);
+ else
+#endif
+ skb->protocol = eth_type_trans(skb, dev);
+ priv->stats.rx_packets++;
+ priv->stats.rx_bytes += skb->len;
+ memset(ATM_SKB(skb), 0, sizeof(struct atm_skb_data));
+ netif_rx(skb);
+ }
+}
+
+static void
+lec_pop(struct atm_vcc *vcc, struct sk_buff *skb)
+{
+ struct lec_vcc_priv *vpriv = LEC_VCC_PRIV(vcc);
+ struct net_device *dev = skb->dev;
+
+ if (vpriv == NULL) {
+ printk("lec_pop(): vpriv = NULL!?!?!?\n");
+ return;
+ }
+
+ vpriv->old_pop(vcc, skb);
+
+ if (vpriv->xoff && atm_may_send(vcc, 0)) {
+ vpriv->xoff = 0;
+ if (netif_running(dev) && netif_queue_stopped(dev))
+ netif_wake_queue(dev);
+ }
+}
+
+static int
+lec_vcc_attach(struct atm_vcc *vcc, void __user *arg)
+{
+ struct lec_vcc_priv *vpriv;
+ int bytes_left;
+ struct atmlec_ioc ioc_data;
+
+ /* Lecd must be up in this case */
+ bytes_left = copy_from_user(&ioc_data, arg, sizeof(struct atmlec_ioc));
+ if (bytes_left != 0) {
+ printk("lec: lec_vcc_attach, copy from user failed for %d bytes\n",
+ bytes_left);
+ }
+ if (ioc_data.dev_num < 0 || ioc_data.dev_num >= MAX_LEC_ITF ||
+ !dev_lec[ioc_data.dev_num])
+ return -EINVAL;
+ if (!(vpriv = kmalloc(sizeof(struct lec_vcc_priv), GFP_KERNEL)))
+ return -ENOMEM;
+ vpriv->xoff = 0;
+ vpriv->old_pop = vcc->pop;
+ vcc->user_back = vpriv;
+ vcc->pop = lec_pop;
+ lec_vcc_added(dev_lec[ioc_data.dev_num]->priv,
+ &ioc_data, vcc, vcc->push);
+ vcc->proto_data = dev_lec[ioc_data.dev_num];
+ vcc->push = lec_push;
+ return 0;
+}
+
+static int
+lec_mcast_attach(struct atm_vcc *vcc, int arg)
+{
+ if (arg <0 || arg >= MAX_LEC_ITF || !dev_lec[arg])
+ return -EINVAL;
+ vcc->proto_data = dev_lec[arg];
+ return (lec_mcast_make((struct lec_priv*)dev_lec[arg]->priv, vcc));
+}
+
+/* Initialize device. */
+static int
+lecd_attach(struct atm_vcc *vcc, int arg)
+{
+ int i;
+ struct lec_priv *priv;
+
+ if (arg<0)
+ i = 0;
+ else
+ i = arg;
+#ifdef CONFIG_TR
+ if (arg >= MAX_LEC_ITF)
+ return -EINVAL;
+#else /* Reserve the top NUM_TR_DEVS for TR */
+ if (arg >= (MAX_LEC_ITF-NUM_TR_DEVS))
+ return -EINVAL;
+#endif
+ if (!dev_lec[i]) {
+ int is_trdev, size;
+
+ is_trdev = 0;
+ if (i >= (MAX_LEC_ITF - NUM_TR_DEVS))
+ is_trdev = 1;
+
+ size = sizeof(struct lec_priv);
+#ifdef CONFIG_TR
+ if (is_trdev)
+ dev_lec[i] = alloc_trdev(size);
+ else
+#endif
+ dev_lec[i] = alloc_etherdev(size);
+ if (!dev_lec[i])
+ return -ENOMEM;
+ snprintf(dev_lec[i]->name, IFNAMSIZ, "lec%d", i);
+ if (register_netdev(dev_lec[i])) {
+ free_netdev(dev_lec[i]);
+ return -EINVAL;
+ }
+
+ priv = dev_lec[i]->priv;
+ priv->is_trdev = is_trdev;
+ lec_init(dev_lec[i]);
+ } else {
+ priv = dev_lec[i]->priv;
+ if (priv->lecd)
+ return -EADDRINUSE;
+ }
+ lec_arp_init(priv);
+ priv->itfnum = i; /* LANE2 addition */
+ priv->lecd = vcc;
+ vcc->dev = &lecatm_dev;
+ vcc_insert_socket(sk_atm(vcc));
+
+ vcc->proto_data = dev_lec[i];
+ set_bit(ATM_VF_META,&vcc->flags);
+ set_bit(ATM_VF_READY,&vcc->flags);
+
+ /* Set default values to these variables */
+ priv->maximum_unknown_frame_count = 1;
+ priv->max_unknown_frame_time = (1*HZ);
+ priv->vcc_timeout_period = (1200*HZ);
+ priv->max_retry_count = 1;
+ priv->aging_time = (300*HZ);
+ priv->forward_delay_time = (15*HZ);
+ priv->topology_change = 0;
+ priv->arp_response_time = (1*HZ);
+ priv->flush_timeout = (4*HZ);
+ priv->path_switching_delay = (6*HZ);
+
+ if (dev_lec[i]->flags & IFF_UP) {
+ netif_start_queue(dev_lec[i]);
+ }
+ __module_get(THIS_MODULE);
+ return i;
+}
+
+#ifdef CONFIG_PROC_FS
+static char* lec_arp_get_status_string(unsigned char status)
+{
+ static char *lec_arp_status_string[] = {
+ "ESI_UNKNOWN ",
+ "ESI_ARP_PENDING ",
+ "ESI_VC_PENDING ",
+ "<Undefined> ",
+ "ESI_FLUSH_PENDING ",
+ "ESI_FORWARD_DIRECT"
+ };
+
+ if (status > ESI_FORWARD_DIRECT)
+ status = 3; /* ESI_UNDEFINED */
+ return lec_arp_status_string[status];
+}
+
+static void lec_info(struct seq_file *seq, struct lec_arp_table *entry)
+{
+ int i;
+
+ for (i = 0; i < ETH_ALEN; i++)
+ seq_printf(seq, "%2.2x", entry->mac_addr[i] & 0xff);
+ seq_printf(seq, " ");
+ for (i = 0; i < ATM_ESA_LEN; i++)
+ seq_printf(seq, "%2.2x", entry->atm_addr[i] & 0xff);
+ seq_printf(seq, " %s %4.4x", lec_arp_get_status_string(entry->status),
+ entry->flags & 0xffff);
+ if (entry->vcc)
+ seq_printf(seq, "%3d %3d ", entry->vcc->vpi, entry->vcc->vci);
+ else
+ seq_printf(seq, " ");
+ if (entry->recv_vcc) {
+ seq_printf(seq, " %3d %3d", entry->recv_vcc->vpi,
+ entry->recv_vcc->vci);
+ }
+ seq_putc(seq, '\n');
+}
+
+
+struct lec_state {
+ unsigned long flags;
+ struct lec_priv *locked;
+ struct lec_arp_table *entry;
+ struct net_device *dev;
+ int itf;
+ int arp_table;
+ int misc_table;
+};
+
+static void *lec_tbl_walk(struct lec_state *state, struct lec_arp_table *tbl,
+ loff_t *l)
+{
+ struct lec_arp_table *e = state->entry;
+
+ if (!e)
+ e = tbl;
+ if (e == (void *)1) {
+ e = tbl;
+ --*l;
+ }
+ for (; e; e = e->next) {
+ if (--*l < 0)
+ break;
+ }
+ state->entry = e;
+ return (*l < 0) ? state : NULL;
+}
+
+static void *lec_arp_walk(struct lec_state *state, loff_t *l,
+ struct lec_priv *priv)
+{
+ void *v = NULL;
+ int p;
+
+ for (p = state->arp_table; p < LEC_ARP_TABLE_SIZE; p++) {
+ v = lec_tbl_walk(state, priv->lec_arp_tables[p], l);
+ if (v)
+ break;
+ }
+ state->arp_table = p;
+ return v;
+}
+
+static void *lec_misc_walk(struct lec_state *state, loff_t *l,
+ struct lec_priv *priv)
+{
+ struct lec_arp_table *lec_misc_tables[] = {
+ priv->lec_arp_empty_ones,
+ priv->lec_no_forward,
+ priv->mcast_fwds
+ };
+ void *v = NULL;
+ int q;
+
+ for (q = state->misc_table; q < ARRAY_SIZE(lec_misc_tables); q++) {
+ v = lec_tbl_walk(state, lec_misc_tables[q], l);
+ if (v)
+ break;
+ }
+ state->misc_table = q;
+ return v;
+}
+
+static void *lec_priv_walk(struct lec_state *state, loff_t *l,
+ struct lec_priv *priv)
+{
+ if (!state->locked) {
+ state->locked = priv;
+ spin_lock_irqsave(&priv->lec_arp_lock, state->flags);
+ }
+ if (!lec_arp_walk(state, l, priv) &&
+ !lec_misc_walk(state, l, priv)) {
+ spin_unlock_irqrestore(&priv->lec_arp_lock, state->flags);
+ state->locked = NULL;
+ /* Partial state reset for the next time we get called */
+ state->arp_table = state->misc_table = 0;
+ }
+ return state->locked;
+}
+
+static void *lec_itf_walk(struct lec_state *state, loff_t *l)
+{
+ struct net_device *dev;
+ void *v;
+
+ dev = state->dev ? state->dev : dev_lec[state->itf];
+ v = (dev && dev->priv) ? lec_priv_walk(state, l, dev->priv) : NULL;
+ if (!v && dev) {
+ dev_put(dev);
+ /* Partial state reset for the next time we get called */
+ dev = NULL;
+ }
+ state->dev = dev;
+ return v;
+}
+
+static void *lec_get_idx(struct lec_state *state, loff_t l)
+{
+ void *v = NULL;
+
+ for (; state->itf < MAX_LEC_ITF; state->itf++) {
+ v = lec_itf_walk(state, &l);
+ if (v)
+ break;
+ }
+ return v;
+}
+
+static void *lec_seq_start(struct seq_file *seq, loff_t *pos)
+{
+ struct lec_state *state = seq->private;
+
+ state->itf = 0;
+ state->dev = NULL;
+ state->locked = NULL;
+ state->arp_table = 0;
+ state->misc_table = 0;
+ state->entry = (void *)1;
+
+ return *pos ? lec_get_idx(state, *pos) : (void*)1;
+}
+
+static void lec_seq_stop(struct seq_file *seq, void *v)
+{
+ struct lec_state *state = seq->private;
+
+ if (state->dev) {
+ spin_unlock_irqrestore(&state->locked->lec_arp_lock,
+ state->flags);
+ dev_put(state->dev);
+ }
+}
+
+static void *lec_seq_next(struct seq_file *seq, void *v, loff_t *pos)
+{
+ struct lec_state *state = seq->private;
+
+ v = lec_get_idx(state, 1);
+ *pos += !!PTR_ERR(v);
+ return v;
+}
+
+static int lec_seq_show(struct seq_file *seq, void *v)
+{
+ static char lec_banner[] = "Itf MAC ATM destination"
+ " Status Flags "
+ "VPI/VCI Recv VPI/VCI\n";
+
+ if (v == (void *)1)
+ seq_puts(seq, lec_banner);
+ else {
+ struct lec_state *state = seq->private;
+ struct net_device *dev = state->dev;
+
+ seq_printf(seq, "%s ", dev->name);
+ lec_info(seq, state->entry);
+ }
+ return 0;
+}
+
+static struct seq_operations lec_seq_ops = {
+ .start = lec_seq_start,
+ .next = lec_seq_next,
+ .stop = lec_seq_stop,
+ .show = lec_seq_show,
+};
+
+static int lec_seq_open(struct inode *inode, struct file *file)
+{
+ struct lec_state *state;
+ struct seq_file *seq;
+ int rc = -EAGAIN;
+
+ state = kmalloc(sizeof(*state), GFP_KERNEL);
+ if (!state) {
+ rc = -ENOMEM;
+ goto out;
+ }
+
+ rc = seq_open(file, &lec_seq_ops);
+ if (rc)
+ goto out_kfree;
+ seq = file->private_data;
+ seq->private = state;
+out:
+ return rc;
+
+out_kfree:
+ kfree(state);
+ goto out;
+}
+
+static int lec_seq_release(struct inode *inode, struct file *file)
+{
+ return seq_release_private(inode, file);
+}
+
+static struct file_operations lec_seq_fops = {
+ .owner = THIS_MODULE,
+ .open = lec_seq_open,
+ .read = seq_read,
+ .llseek = seq_lseek,
+ .release = lec_seq_release,
+};
+#endif
+
+static int lane_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg)
+{
+ struct atm_vcc *vcc = ATM_SD(sock);
+ int err = 0;
+
+ switch (cmd) {
+ case ATMLEC_CTRL:
+ case ATMLEC_MCAST:
+ case ATMLEC_DATA:
+ if (!capable(CAP_NET_ADMIN))
+ return -EPERM;
+ break;
+ default:
+ return -ENOIOCTLCMD;
+ }
+
+ switch (cmd) {
+ case ATMLEC_CTRL:
+ err = lecd_attach(vcc, (int) arg);
+ if (err >= 0)
+ sock->state = SS_CONNECTED;
+ break;
+ case ATMLEC_MCAST:
+ err = lec_mcast_attach(vcc, (int) arg);
+ break;
+ case ATMLEC_DATA:
+ err = lec_vcc_attach(vcc, (void __user *) arg);
+ break;
+ }
+
+ return err;
+}
+
+static struct atm_ioctl lane_ioctl_ops = {
+ .owner = THIS_MODULE,
+ .ioctl = lane_ioctl,
+};
+
+static int __init lane_module_init(void)
+{
+#ifdef CONFIG_PROC_FS
+ struct proc_dir_entry *p;
+
+ p = create_proc_entry("lec", S_IRUGO, atm_proc_root);
+ if (p)
+ p->proc_fops = &lec_seq_fops;
+#endif
+
+ register_atm_ioctl(&lane_ioctl_ops);
+ printk("lec.c: " __DATE__ " " __TIME__ " initialized\n");
+ return 0;
+}
+
+static void __exit lane_module_cleanup(void)
+{
+ int i;
+ struct lec_priv *priv;
+
+ remove_proc_entry("lec", atm_proc_root);
+
+ deregister_atm_ioctl(&lane_ioctl_ops);
+
+ for (i = 0; i < MAX_LEC_ITF; i++) {
+ if (dev_lec[i] != NULL) {
+ priv = (struct lec_priv *)dev_lec[i]->priv;
+ unregister_netdev(dev_lec[i]);
+ free_netdev(dev_lec[i]);
+ dev_lec[i] = NULL;
+ }
+ }
+
+ return;
+}
+
+module_init(lane_module_init);
+module_exit(lane_module_cleanup);
+
+/*
+ * LANE2: 3.1.3, LE_RESOLVE.request
+ * Non force allocates memory and fills in *tlvs, fills in *sizeoftlvs.
+ * If sizeoftlvs == NULL the default TLVs associated with with this
+ * lec will be used.
+ * If dst_mac == NULL, targetless LE_ARP will be sent
+ */
+static int lane2_resolve(struct net_device *dev, u8 *dst_mac, int force,
+ u8 **tlvs, u32 *sizeoftlvs)
+{
+ unsigned long flags;
+ struct lec_priv *priv = (struct lec_priv *)dev->priv;
+ struct lec_arp_table *table;
+ struct sk_buff *skb;
+ int retval;
+
+ if (force == 0) {
+ spin_lock_irqsave(&priv->lec_arp_lock, flags);
+ table = lec_arp_find(priv, dst_mac);
+ spin_unlock_irqrestore(&priv->lec_arp_lock, flags);
+ if(table == NULL)
+ return -1;
+
+ *tlvs = kmalloc(table->sizeoftlvs, GFP_ATOMIC);
+ if (*tlvs == NULL)
+ return -1;
+
+ memcpy(*tlvs, table->tlvs, table->sizeoftlvs);
+ *sizeoftlvs = table->sizeoftlvs;
+
+ return 0;
+ }
+
+ if (sizeoftlvs == NULL)
+ retval = send_to_lecd(priv, l_arp_xmt, dst_mac, NULL, NULL);
+
+ else {
+ skb = alloc_skb(*sizeoftlvs, GFP_ATOMIC);
+ if (skb == NULL)
+ return -1;
+ skb->len = *sizeoftlvs;
+ memcpy(skb->data, *tlvs, *sizeoftlvs);
+ retval = send_to_lecd(priv, l_arp_xmt, dst_mac, NULL, skb);
+ }
+ return retval;
+}
+
+
+/*
+ * LANE2: 3.1.4, LE_ASSOCIATE.request
+ * Associate the *tlvs with the *lan_dst address.
+ * Will overwrite any previous association
+ * Returns 1 for success, 0 for failure (out of memory)
+ *
+ */
+static int lane2_associate_req (struct net_device *dev, u8 *lan_dst,
+ u8 *tlvs, u32 sizeoftlvs)
+{
+ int retval;
+ struct sk_buff *skb;
+ struct lec_priv *priv = (struct lec_priv*)dev->priv;
+
+ if ( memcmp(lan_dst, dev->dev_addr, ETH_ALEN) != 0 )
+ return (0); /* not our mac address */
+
+ kfree(priv->tlvs); /* NULL if there was no previous association */
+
+ priv->tlvs = kmalloc(sizeoftlvs, GFP_KERNEL);
+ if (priv->tlvs == NULL)
+ return (0);
+ priv->sizeoftlvs = sizeoftlvs;
+ memcpy(priv->tlvs, tlvs, sizeoftlvs);
+
+ skb = alloc_skb(sizeoftlvs, GFP_ATOMIC);
+ if (skb == NULL)
+ return 0;
+ skb->len = sizeoftlvs;
+ memcpy(skb->data, tlvs, sizeoftlvs);
+ retval = send_to_lecd(priv, l_associate_req, NULL, NULL, skb);
+ if (retval != 0)
+ printk("lec.c: lane2_associate_req() failed\n");
+ /* If the previous association has changed we must
+ * somehow notify other LANE entities about the change
+ */
+ return (1);
+}
+
+/*
+ * LANE2: 3.1.5, LE_ASSOCIATE.indication
+ *
+ */
+static void lane2_associate_ind (struct net_device *dev, u8 *mac_addr,
+ u8 *tlvs, u32 sizeoftlvs)
+{
+#if 0
+ int i = 0;
+#endif
+ struct lec_priv *priv = (struct lec_priv *)dev->priv;
+#if 0 /* Why have the TLVs in LE_ARP entries since we do not use them? When you
+ uncomment this code, make sure the TLVs get freed when entry is killed */
+ struct lec_arp_table *entry = lec_arp_find(priv, mac_addr);
+
+ if (entry == NULL)
+ return; /* should not happen */
+
+ kfree(entry->tlvs);
+
+ entry->tlvs = kmalloc(sizeoftlvs, GFP_KERNEL);
+ if (entry->tlvs == NULL)
+ return;
+
+ entry->sizeoftlvs = sizeoftlvs;
+ memcpy(entry->tlvs, tlvs, sizeoftlvs);
+#endif
+#if 0
+ printk("lec.c: lane2_associate_ind()\n");
+ printk("dump of tlvs, sizeoftlvs=%d\n", sizeoftlvs);
+ while (i < sizeoftlvs)
+ printk("%02x ", tlvs[i++]);
+
+ printk("\n");
+#endif
+
+ /* tell MPOA about the TLVs we saw */
+ if (priv->lane2_ops && priv->lane2_ops->associate_indicator) {
+ priv->lane2_ops->associate_indicator(dev, mac_addr,
+ tlvs, sizeoftlvs);
+ }
+ return;
+}
+
+/*
+ * Here starts what used to lec_arpc.c
+ *
+ * lec_arpc.c was added here when making
+ * lane client modular. October 1997
+ *
+ */
+
+#include <linux/types.h>
+#include <linux/sched.h>
+#include <linux/timer.h>
+#include <asm/param.h>
+#include <asm/atomic.h>
+#include <linux/inetdevice.h>
+#include <net/route.h>
+
+
+#if 0
+#define DPRINTK(format,args...)
+/*
+#define DPRINTK printk
+*/
+#endif
+#define DEBUG_ARP_TABLE 0
+
+#define LEC_ARP_REFRESH_INTERVAL (3*HZ)
+
+static void lec_arp_check_expire(unsigned long data);
+static void lec_arp_expire_arp(unsigned long data);
+
+/*
+ * Arp table funcs
+ */
+
+#define HASH(ch) (ch & (LEC_ARP_TABLE_SIZE -1))
+
+/*
+ * Initialization of arp-cache
+ */
+static void
+lec_arp_init(struct lec_priv *priv)
+{
+ unsigned short i;
+
+ for (i = 0; i < LEC_ARP_TABLE_SIZE; i++) {
+ priv->lec_arp_tables[i] = NULL;
+ }
+ spin_lock_init(&priv->lec_arp_lock);
+ init_timer(&priv->lec_arp_timer);
+ priv->lec_arp_timer.expires = jiffies + LEC_ARP_REFRESH_INTERVAL;
+ priv->lec_arp_timer.data = (unsigned long)priv;
+ priv->lec_arp_timer.function = lec_arp_check_expire;
+ add_timer(&priv->lec_arp_timer);
+}
+
+static void
+lec_arp_clear_vccs(struct lec_arp_table *entry)
+{
+ if (entry->vcc) {
+ struct atm_vcc *vcc = entry->vcc;
+ struct lec_vcc_priv *vpriv = LEC_VCC_PRIV(vcc);
+ struct net_device *dev = (struct net_device*) vcc->proto_data;
+
+ vcc->pop = vpriv->old_pop;
+ if (vpriv->xoff)
+ netif_wake_queue(dev);
+ kfree(vpriv);
+ vcc->user_back = NULL;
+ vcc->push = entry->old_push;
+ vcc_release_async(vcc, -EPIPE);
+ vcc = NULL;
+ }
+ if (entry->recv_vcc) {
+ entry->recv_vcc->push = entry->old_recv_push;
+ vcc_release_async(entry->recv_vcc, -EPIPE);
+ entry->recv_vcc = NULL;
+ }
+}
+
+/*
+ * Insert entry to lec_arp_table
+ * LANE2: Add to the end of the list to satisfy 8.1.13
+ */
+static inline void
+lec_arp_add(struct lec_priv *priv, struct lec_arp_table *to_add)
+{
+ unsigned short place;
+ struct lec_arp_table *tmp;
+
+ place = HASH(to_add->mac_addr[ETH_ALEN-1]);
+ tmp = priv->lec_arp_tables[place];
+ to_add->next = NULL;
+ if (tmp == NULL)
+ priv->lec_arp_tables[place] = to_add;
+
+ else { /* add to the end */
+ while (tmp->next)
+ tmp = tmp->next;
+ tmp->next = to_add;
+ }
+
+ DPRINTK("LEC_ARP: Added entry:%2.2x %2.2x %2.2x %2.2x %2.2x %2.2x\n",
+ 0xff&to_add->mac_addr[0], 0xff&to_add->mac_addr[1],
+ 0xff&to_add->mac_addr[2], 0xff&to_add->mac_addr[3],
+ 0xff&to_add->mac_addr[4], 0xff&to_add->mac_addr[5]);
+}
+
+/*
+ * Remove entry from lec_arp_table
+ */
+static int
+lec_arp_remove(struct lec_priv *priv,
+ struct lec_arp_table *to_remove)
+{
+ unsigned short place;
+ struct lec_arp_table *tmp;
+ int remove_vcc=1;
+
+ if (!to_remove) {
+ return -1;
+ }
+ place = HASH(to_remove->mac_addr[ETH_ALEN-1]);
+ tmp = priv->lec_arp_tables[place];
+ if (tmp == to_remove) {
+ priv->lec_arp_tables[place] = tmp->next;
+ } else {
+ while(tmp && tmp->next != to_remove) {
+ tmp = tmp->next;
+ }
+ if (!tmp) {/* Entry was not found */
+ return -1;
+ }
+ }
+ tmp->next = to_remove->next;
+ del_timer(&to_remove->timer);
+
+ /* If this is the only MAC connected to this VCC, also tear down
+ the VCC */
+ if (to_remove->status >= ESI_FLUSH_PENDING) {
+ /*
+ * ESI_FLUSH_PENDING, ESI_FORWARD_DIRECT
+ */
+ for(place = 0; place < LEC_ARP_TABLE_SIZE; place++) {
+ for(tmp = priv->lec_arp_tables[place]; tmp != NULL; tmp = tmp->next) {
+ if (memcmp(tmp->atm_addr, to_remove->atm_addr,
+ ATM_ESA_LEN)==0) {
+ remove_vcc=0;
+ break;
+ }
+ }
+ }
+ if (remove_vcc)
+ lec_arp_clear_vccs(to_remove);
+ }
+ skb_queue_purge(&to_remove->tx_wait); /* FIXME: good place for this? */
+
+ DPRINTK("LEC_ARP: Removed entry:%2.2x %2.2x %2.2x %2.2x %2.2x %2.2x\n",
+ 0xff&to_remove->mac_addr[0], 0xff&to_remove->mac_addr[1],
+ 0xff&to_remove->mac_addr[2], 0xff&to_remove->mac_addr[3],
+ 0xff&to_remove->mac_addr[4], 0xff&to_remove->mac_addr[5]);
+ return 0;
+}
+
+#if DEBUG_ARP_TABLE
+static char*
+get_status_string(unsigned char st)
+{
+ switch(st) {
+ case ESI_UNKNOWN:
+ return "ESI_UNKNOWN";
+ case ESI_ARP_PENDING:
+ return "ESI_ARP_PENDING";
+ case ESI_VC_PENDING:
+ return "ESI_VC_PENDING";
+ case ESI_FLUSH_PENDING:
+ return "ESI_FLUSH_PENDING";
+ case ESI_FORWARD_DIRECT:
+ return "ESI_FORWARD_DIRECT";
+ default:
+ return "<UNKNOWN>";
+ }
+}
+#endif
+
+static void
+dump_arp_table(struct lec_priv *priv)
+{
+#if DEBUG_ARP_TABLE
+ int i,j, offset;
+ struct lec_arp_table *rulla;
+ char buf[1024];
+ struct lec_arp_table **lec_arp_tables =
+ (struct lec_arp_table **)priv->lec_arp_tables;
+ struct lec_arp_table *lec_arp_empty_ones =
+ (struct lec_arp_table *)priv->lec_arp_empty_ones;
+ struct lec_arp_table *lec_no_forward =
+ (struct lec_arp_table *)priv->lec_no_forward;
+ struct lec_arp_table *mcast_fwds = priv->mcast_fwds;
+
+
+ printk("Dump %p:\n",priv);
+ for (i=0;i<LEC_ARP_TABLE_SIZE;i++) {
+ rulla = lec_arp_tables[i];
+ offset = 0;
+ offset += sprintf(buf,"%d: %p\n",i, rulla);
+ while (rulla) {
+ offset += sprintf(buf+offset,"Mac:");
+ for(j=0;j<ETH_ALEN;j++) {
+ offset+=sprintf(buf+offset,
+ "%2.2x ",
+ rulla->mac_addr[j]&0xff);
+ }
+ offset +=sprintf(buf+offset,"Atm:");
+ for(j=0;j<ATM_ESA_LEN;j++) {
+ offset+=sprintf(buf+offset,
+ "%2.2x ",
+ rulla->atm_addr[j]&0xff);
+ }
+ offset+=sprintf(buf+offset,
+ "Vcc vpi:%d vci:%d, Recv_vcc vpi:%d vci:%d Last_used:%lx, Timestamp:%lx, No_tries:%d ",
+ rulla->vcc?rulla->vcc->vpi:0,
+ rulla->vcc?rulla->vcc->vci:0,
+ rulla->recv_vcc?rulla->recv_vcc->vpi:0,
+ rulla->recv_vcc?rulla->recv_vcc->vci:0,
+ rulla->last_used,
+ rulla->timestamp, rulla->no_tries);
+ offset+=sprintf(buf+offset,
+ "Flags:%x, Packets_flooded:%x, Status: %s ",
+ rulla->flags, rulla->packets_flooded,
+ get_status_string(rulla->status));
+ offset+=sprintf(buf+offset,"->%p\n",rulla->next);
+ rulla = rulla->next;
+ }
+ printk("%s",buf);
+ }
+ rulla = lec_no_forward;
+ if (rulla)
+ printk("No forward\n");
+ while(rulla) {
+ offset=0;
+ offset += sprintf(buf+offset,"Mac:");
+ for(j=0;j<ETH_ALEN;j++) {
+ offset+=sprintf(buf+offset,"%2.2x ",
+ rulla->mac_addr[j]&0xff);
+ }
+ offset +=sprintf(buf+offset,"Atm:");
+ for(j=0;j<ATM_ESA_LEN;j++) {
+ offset+=sprintf(buf+offset,"%2.2x ",
+ rulla->atm_addr[j]&0xff);
+ }
+ offset+=sprintf(buf+offset,
+ "Vcc vpi:%d vci:%d, Recv_vcc vpi:%d vci:%d Last_used:%lx, Timestamp:%lx, No_tries:%d ",
+ rulla->vcc?rulla->vcc->vpi:0,
+ rulla->vcc?rulla->vcc->vci:0,
+ rulla->recv_vcc?rulla->recv_vcc->vpi:0,
+ rulla->recv_vcc?rulla->recv_vcc->vci:0,
+ rulla->last_used,
+ rulla->timestamp, rulla->no_tries);
+ offset+=sprintf(buf+offset,
+ "Flags:%x, Packets_flooded:%x, Status: %s ",
+ rulla->flags, rulla->packets_flooded,
+ get_status_string(rulla->status));
+ offset+=sprintf(buf+offset,"->%lx\n",(long)rulla->next);
+ rulla = rulla->next;
+ printk("%s",buf);
+ }
+ rulla = lec_arp_empty_ones;
+ if (rulla)
+ printk("Empty ones\n");
+ while(rulla) {
+ offset=0;
+ offset += sprintf(buf+offset,"Mac:");
+ for(j=0;j<ETH_ALEN;j++) {
+ offset+=sprintf(buf+offset,"%2.2x ",
+ rulla->mac_addr[j]&0xff);
+ }
+ offset +=sprintf(buf+offset,"Atm:");
+ for(j=0;j<ATM_ESA_LEN;j++) {
+ offset+=sprintf(buf+offset,"%2.2x ",
+ rulla->atm_addr[j]&0xff);
+ }
+ offset+=sprintf(buf+offset,
+ "Vcc vpi:%d vci:%d, Recv_vcc vpi:%d vci:%d Last_used:%lx, Timestamp:%lx, No_tries:%d ",
+ rulla->vcc?rulla->vcc->vpi:0,
+ rulla->vcc?rulla->vcc->vci:0,
+ rulla->recv_vcc?rulla->recv_vcc->vpi:0,
+ rulla->recv_vcc?rulla->recv_vcc->vci:0,
+ rulla->last_used,
+ rulla->timestamp, rulla->no_tries);
+ offset+=sprintf(buf+offset,
+ "Flags:%x, Packets_flooded:%x, Status: %s ",
+ rulla->flags, rulla->packets_flooded,
+ get_status_string(rulla->status));
+ offset+=sprintf(buf+offset,"->%lx\n",(long)rulla->next);
+ rulla = rulla->next;
+ printk("%s",buf);
+ }
+
+ rulla = mcast_fwds;
+ if (rulla)
+ printk("Multicast Forward VCCs\n");
+ while(rulla) {
+ offset=0;
+ offset += sprintf(buf+offset,"Mac:");
+ for(j=0;j<ETH_ALEN;j++) {
+ offset+=sprintf(buf+offset,"%2.2x ",
+ rulla->mac_addr[j]&0xff);
+ }
+ offset +=sprintf(buf+offset,"Atm:");
+ for(j=0;j<ATM_ESA_LEN;j++) {
+ offset+=sprintf(buf+offset,"%2.2x ",
+ rulla->atm_addr[j]&0xff);
+ }
+ offset+=sprintf(buf+offset,
+ "Vcc vpi:%d vci:%d, Recv_vcc vpi:%d vci:%d Last_used:%lx, Timestamp:%lx, No_tries:%d ",
+ rulla->vcc?rulla->vcc->vpi:0,
+ rulla->vcc?rulla->vcc->vci:0,
+ rulla->recv_vcc?rulla->recv_vcc->vpi:0,
+ rulla->recv_vcc?rulla->recv_vcc->vci:0,
+ rulla->last_used,
+ rulla->timestamp, rulla->no_tries);
+ offset+=sprintf(buf+offset,
+ "Flags:%x, Packets_flooded:%x, Status: %s ",
+ rulla->flags, rulla->packets_flooded,
+ get_status_string(rulla->status));
+ offset+=sprintf(buf+offset,"->%lx\n",(long)rulla->next);
+ rulla = rulla->next;
+ printk("%s",buf);
+ }
+
+#endif
+}
+
+/*
+ * Destruction of arp-cache
+ */
+static void
+lec_arp_destroy(struct lec_priv *priv)
+{
+ unsigned long flags;
+ struct lec_arp_table *entry, *next;
+ int i;
+
+ del_timer_sync(&priv->lec_arp_timer);
+
+ /*
+ * Remove all entries
+ */
+
+ spin_lock_irqsave(&priv->lec_arp_lock, flags);
+ for (i = 0; i < LEC_ARP_TABLE_SIZE; i++) {
+ for(entry = priv->lec_arp_tables[i]; entry != NULL; entry=next) {
+ next = entry->next;
+ lec_arp_remove(priv, entry);
+ kfree(entry);
+ }
+ }
+ entry = priv->lec_arp_empty_ones;
+ while(entry) {
+ next = entry->next;
+ del_timer_sync(&entry->timer);
+ lec_arp_clear_vccs(entry);
+ kfree(entry);
+ entry = next;
+ }
+ priv->lec_arp_empty_ones = NULL;
+ entry = priv->lec_no_forward;
+ while(entry) {
+ next = entry->next;
+ del_timer_sync(&entry->timer);
+ lec_arp_clear_vccs(entry);
+ kfree(entry);
+ entry = next;
+ }
+ priv->lec_no_forward = NULL;
+ entry = priv->mcast_fwds;
+ while(entry) {
+ next = entry->next;
+ /* No timer, LANEv2 7.1.20 and 2.3.5.3 */
+ lec_arp_clear_vccs(entry);
+ kfree(entry);
+ entry = next;
+ }
+ priv->mcast_fwds = NULL;
+ priv->mcast_vcc = NULL;
+ memset(priv->lec_arp_tables, 0,
+ sizeof(struct lec_arp_table *) * LEC_ARP_TABLE_SIZE);
+ spin_unlock_irqrestore(&priv->lec_arp_lock, flags);
+}
+
+
+/*
+ * Find entry by mac_address
+ */
+static struct lec_arp_table*
+lec_arp_find(struct lec_priv *priv,
+ unsigned char *mac_addr)
+{
+ unsigned short place;
+ struct lec_arp_table *to_return;
+
+ DPRINTK("LEC_ARP: lec_arp_find :%2.2x %2.2x %2.2x %2.2x %2.2x %2.2x\n",
+ mac_addr[0]&0xff, mac_addr[1]&0xff, mac_addr[2]&0xff,
+ mac_addr[3]&0xff, mac_addr[4]&0xff, mac_addr[5]&0xff);
+ place = HASH(mac_addr[ETH_ALEN-1]);
+
+ to_return = priv->lec_arp_tables[place];
+ while(to_return) {
+ if (memcmp(mac_addr, to_return->mac_addr, ETH_ALEN) == 0) {
+ return to_return;
+ }
+ to_return = to_return->next;
+ }
+ return NULL;
+}
+
+static struct lec_arp_table*
+make_entry(struct lec_priv *priv, unsigned char *mac_addr)
+{
+ struct lec_arp_table *to_return;
+
+ to_return = (struct lec_arp_table *) kmalloc(sizeof(struct lec_arp_table),
+ GFP_ATOMIC);
+ if (!to_return) {
+ printk("LEC: Arp entry kmalloc failed\n");
+ return NULL;
+ }
+ memset(to_return, 0, sizeof(struct lec_arp_table));
+ memcpy(to_return->mac_addr, mac_addr, ETH_ALEN);
+ init_timer(&to_return->timer);
+ to_return->timer.function = lec_arp_expire_arp;
+ to_return->timer.data = (unsigned long) to_return;
+ to_return->last_used = jiffies;
+ to_return->priv = priv;
+ skb_queue_head_init(&to_return->tx_wait);
+ return to_return;
+}
+
+/*
+ *
+ * Arp sent timer expired
+ *
+ */
+static void
+lec_arp_expire_arp(unsigned long data)
+{
+ struct lec_arp_table *entry;
+
+ entry = (struct lec_arp_table *)data;
+
+ DPRINTK("lec_arp_expire_arp\n");
+ if (entry->status == ESI_ARP_PENDING) {
+ if (entry->no_tries <= entry->priv->max_retry_count) {
+ if (entry->is_rdesc)
+ send_to_lecd(entry->priv, l_rdesc_arp_xmt, entry->mac_addr, NULL, NULL);
+ else
+ send_to_lecd(entry->priv, l_arp_xmt, entry->mac_addr, NULL, NULL);
+ entry->no_tries++;
+ }
+ mod_timer(&entry->timer, jiffies + (1*HZ));
+ }
+}
+
+/*
+ *
+ * Unknown/unused vcc expire, remove associated entry
+ *
+ */
+static void
+lec_arp_expire_vcc(unsigned long data)
+{
+ unsigned long flags;
+ struct lec_arp_table *to_remove = (struct lec_arp_table*)data;
+ struct lec_priv *priv = (struct lec_priv *)to_remove->priv;
+ struct lec_arp_table *entry = NULL;
+
+ del_timer(&to_remove->timer);
+
+ DPRINTK("LEC_ARP %p %p: lec_arp_expire_vcc vpi:%d vci:%d\n",
+ to_remove, priv,
+ to_remove->vcc?to_remove->recv_vcc->vpi:0,
+ to_remove->vcc?to_remove->recv_vcc->vci:0);
+ DPRINTK("eo:%p nf:%p\n",priv->lec_arp_empty_ones,priv->lec_no_forward);
+
+ spin_lock_irqsave(&priv->lec_arp_lock, flags);
+ if (to_remove == priv->lec_arp_empty_ones)
+ priv->lec_arp_empty_ones = to_remove->next;
+ else {
+ entry = priv->lec_arp_empty_ones;
+ while (entry && entry->next != to_remove)
+ entry = entry->next;
+ if (entry)
+ entry->next = to_remove->next;
+ }
+ if (!entry) {
+ if (to_remove == priv->lec_no_forward) {
+ priv->lec_no_forward = to_remove->next;
+ } else {
+ entry = priv->lec_no_forward;
+ while (entry && entry->next != to_remove)
+ entry = entry->next;
+ if (entry)
+ entry->next = to_remove->next;
+ }
+ }
+ spin_unlock_irqrestore(&priv->lec_arp_lock, flags);
+
+ lec_arp_clear_vccs(to_remove);
+ kfree(to_remove);
+}
+
+/*
+ * Expire entries.
+ * 1. Re-set timer
+ * 2. For each entry, delete entries that have aged past the age limit.
+ * 3. For each entry, depending on the status of the entry, perform
+ * the following maintenance.
+ * a. If status is ESI_VC_PENDING or ESI_ARP_PENDING then if the
+ * tick_count is above the max_unknown_frame_time, clear
+ * the tick_count to zero and clear the packets_flooded counter
+ * to zero. This supports the packet rate limit per address
+ * while flooding unknowns.
+ * b. If the status is ESI_FLUSH_PENDING and the tick_count is greater
+ * than or equal to the path_switching_delay, change the status
+ * to ESI_FORWARD_DIRECT. This causes the flush period to end
+ * regardless of the progress of the flush protocol.
+ */
+static void
+lec_arp_check_expire(unsigned long data)
+{
+ unsigned long flags;
+ struct lec_priv *priv = (struct lec_priv *)data;
+ struct lec_arp_table *entry, *next;
+ unsigned long now;
+ unsigned long time_to_check;
+ int i;
+
+ DPRINTK("lec_arp_check_expire %p\n",priv);
+ DPRINTK("expire: eo:%p nf:%p\n",priv->lec_arp_empty_ones,
+ priv->lec_no_forward);
+ now = jiffies;
+ spin_lock_irqsave(&priv->lec_arp_lock, flags);
+ for(i = 0; i < LEC_ARP_TABLE_SIZE; i++) {
+ for(entry = priv->lec_arp_tables[i]; entry != NULL; ) {
+ if ((entry->flags) & LEC_REMOTE_FLAG &&
+ priv->topology_change)
+ time_to_check = priv->forward_delay_time;
+ else
+ time_to_check = priv->aging_time;
+
+ DPRINTK("About to expire: %lx - %lx > %lx\n",
+ now,entry->last_used, time_to_check);
+ if( time_after(now, entry->last_used+
+ time_to_check) &&
+ !(entry->flags & LEC_PERMANENT_FLAG) &&
+ !(entry->mac_addr[0] & 0x01) ) { /* LANE2: 7.1.20 */
+ /* Remove entry */
+ DPRINTK("LEC:Entry timed out\n");
+ next = entry->next;
+ lec_arp_remove(priv, entry);
+ kfree(entry);
+ entry = next;
+ } else {
+ /* Something else */
+ if ((entry->status == ESI_VC_PENDING ||
+ entry->status == ESI_ARP_PENDING)
+ && time_after_eq(now,
+ entry->timestamp +
+ priv->max_unknown_frame_time)) {
+ entry->timestamp = jiffies;
+ entry->packets_flooded = 0;
+ if (entry->status == ESI_VC_PENDING)
+ send_to_lecd(priv, l_svc_setup, entry->mac_addr, entry->atm_addr, NULL);
+ }
+ if (entry->status == ESI_FLUSH_PENDING
+ &&
+ time_after_eq(now, entry->timestamp+
+ priv->path_switching_delay)) {
+ struct sk_buff *skb;
+
+ while ((skb = skb_dequeue(&entry->tx_wait)) != NULL)
+ lec_send(entry->vcc, skb, entry->priv);
+ entry->last_used = jiffies;
+ entry->status =
+ ESI_FORWARD_DIRECT;
+ }
+ entry = entry->next;
+ }
+ }
+ }
+ spin_unlock_irqrestore(&priv->lec_arp_lock, flags);
+
+ mod_timer(&priv->lec_arp_timer, jiffies + LEC_ARP_REFRESH_INTERVAL);
+}
+/*
+ * Try to find vcc where mac_address is attached.
+ *
+ */
+static struct atm_vcc*
+lec_arp_resolve(struct lec_priv *priv, unsigned char *mac_to_find,
+ int is_rdesc, struct lec_arp_table **ret_entry)
+{
+ unsigned long flags;
+ struct lec_arp_table *entry;
+ struct atm_vcc *found;
+
+ if (mac_to_find[0] & 0x01) {
+ switch (priv->lane_version) {
+ case 1:
+ return priv->mcast_vcc;
+ break;
+ case 2: /* LANE2 wants arp for multicast addresses */
+ if ( memcmp(mac_to_find, bus_mac, ETH_ALEN) == 0)
+ return priv->mcast_vcc;
+ break;
+ default:
+ break;
+ }
+ }
+
+ spin_lock_irqsave(&priv->lec_arp_lock, flags);
+ entry = lec_arp_find(priv, mac_to_find);
+
+ if (entry) {
+ if (entry->status == ESI_FORWARD_DIRECT) {
+ /* Connection Ok */
+ entry->last_used = jiffies;
+ *ret_entry = entry;
+ found = entry->vcc;
+ goto out;
+ }
+ /* Data direct VC not yet set up, check to see if the unknown
+ frame count is greater than the limit. If the limit has
+ not been reached, allow the caller to send packet to
+ BUS. */
+ if (entry->status != ESI_FLUSH_PENDING &&
+ entry->packets_flooded<priv->maximum_unknown_frame_count) {
+ entry->packets_flooded++;
+ DPRINTK("LEC_ARP: Flooding..\n");
+ found = priv->mcast_vcc;
+ goto out;
+ }
+ /* We got here because entry->status == ESI_FLUSH_PENDING
+ * or BUS flood limit was reached for an entry which is
+ * in ESI_ARP_PENDING or ESI_VC_PENDING state.
+ */
+ *ret_entry = entry;
+ DPRINTK("lec: entry->status %d entry->vcc %p\n", entry->status, entry->vcc);
+ found = NULL;
+ } else {
+ /* No matching entry was found */
+ entry = make_entry(priv, mac_to_find);
+ DPRINTK("LEC_ARP: Making entry\n");
+ if (!entry) {
+ found = priv->mcast_vcc;
+ goto out;
+ }
+ lec_arp_add(priv, entry);
+ /* We want arp-request(s) to be sent */
+ entry->packets_flooded =1;
+ entry->status = ESI_ARP_PENDING;
+ entry->no_tries = 1;
+ entry->last_used = entry->timestamp = jiffies;
+ entry->is_rdesc = is_rdesc;
+ if (entry->is_rdesc)
+ send_to_lecd(priv, l_rdesc_arp_xmt, mac_to_find, NULL, NULL);
+ else
+ send_to_lecd(priv, l_arp_xmt, mac_to_find, NULL, NULL);
+ entry->timer.expires = jiffies + (1*HZ);
+ entry->timer.function = lec_arp_expire_arp;
+ add_timer(&entry->timer);
+ found = priv->mcast_vcc;
+ }
+
+out:
+ spin_unlock_irqrestore(&priv->lec_arp_lock, flags);
+ return found;
+}
+
+static int
+lec_addr_delete(struct lec_priv *priv, unsigned char *atm_addr,
+ unsigned long permanent)
+{
+ unsigned long flags;
+ struct lec_arp_table *entry, *next;
+ int i;
+
+ DPRINTK("lec_addr_delete\n");
+ spin_lock_irqsave(&priv->lec_arp_lock, flags);
+ for(i = 0; i < LEC_ARP_TABLE_SIZE; i++) {
+ for(entry = priv->lec_arp_tables[i]; entry != NULL; entry = next) {
+ next = entry->next;
+ if (!memcmp(atm_addr, entry->atm_addr, ATM_ESA_LEN)
+ && (permanent ||
+ !(entry->flags & LEC_PERMANENT_FLAG))) {
+ lec_arp_remove(priv, entry);
+ kfree(entry);
+ }
+ spin_unlock_irqrestore(&priv->lec_arp_lock, flags);
+ return 0;
+ }
+ }
+ spin_unlock_irqrestore(&priv->lec_arp_lock, flags);
+ return -1;
+}
+
+/*
+ * Notifies: Response to arp_request (atm_addr != NULL)
+ */
+static void
+lec_arp_update(struct lec_priv *priv, unsigned char *mac_addr,
+ unsigned char *atm_addr, unsigned long remoteflag,
+ unsigned int targetless_le_arp)
+{
+ unsigned long flags;
+ struct lec_arp_table *entry, *tmp;
+ int i;
+
+ DPRINTK("lec:%s", (targetless_le_arp) ? "targetless ": " ");
+ DPRINTK("lec_arp_update mac:%2.2x%2.2x%2.2x%2.2x%2.2x%2.2x\n",
+ mac_addr[0],mac_addr[1],mac_addr[2],mac_addr[3],
+ mac_addr[4],mac_addr[5]);
+
+ spin_lock_irqsave(&priv->lec_arp_lock, flags);
+ entry = lec_arp_find(priv, mac_addr);
+ if (entry == NULL && targetless_le_arp)
+ goto out; /* LANE2: ignore targetless LE_ARPs for which
+ * we have no entry in the cache. 7.1.30
+ */
+ if (priv->lec_arp_empty_ones) {
+ entry = priv->lec_arp_empty_ones;
+ if (!memcmp(entry->atm_addr, atm_addr, ATM_ESA_LEN)) {
+ priv->lec_arp_empty_ones = entry->next;
+ } else {
+ while(entry->next && memcmp(entry->next->atm_addr,
+ atm_addr, ATM_ESA_LEN))
+ entry = entry->next;
+ if (entry->next) {
+ tmp = entry;
+ entry = entry->next;
+ tmp->next = entry->next;
+ } else
+ entry = NULL;
+
+ }
+ if (entry) {
+ del_timer(&entry->timer);
+ tmp = lec_arp_find(priv, mac_addr);
+ if (tmp) {
+ del_timer(&tmp->timer);
+ tmp->status = ESI_FORWARD_DIRECT;
+ memcpy(tmp->atm_addr, atm_addr, ATM_ESA_LEN);
+ tmp->vcc = entry->vcc;
+ tmp->old_push = entry->old_push;
+ tmp->last_used = jiffies;
+ del_timer(&entry->timer);
+ kfree(entry);
+ entry=tmp;
+ } else {
+ entry->status = ESI_FORWARD_DIRECT;
+ memcpy(entry->mac_addr, mac_addr, ETH_ALEN);
+ entry->last_used = jiffies;
+ lec_arp_add(priv, entry);
+ }
+ if (remoteflag)
+ entry->flags|=LEC_REMOTE_FLAG;
+ else
+ entry->flags&=~LEC_REMOTE_FLAG;
+ DPRINTK("After update\n");
+ dump_arp_table(priv);
+ goto out;
+ }
+ }
+ entry = lec_arp_find(priv, mac_addr);
+ if (!entry) {
+ entry = make_entry(priv, mac_addr);
+ if (!entry)
+ goto out;
+ entry->status = ESI_UNKNOWN;
+ lec_arp_add(priv, entry);
+ /* Temporary, changes before end of function */
+ }
+ memcpy(entry->atm_addr, atm_addr, ATM_ESA_LEN);
+ del_timer(&entry->timer);
+ for(i = 0; i < LEC_ARP_TABLE_SIZE; i++) {
+ for(tmp = priv->lec_arp_tables[i]; tmp; tmp=tmp->next) {
+ if (entry != tmp &&
+ !memcmp(tmp->atm_addr, atm_addr,
+ ATM_ESA_LEN)) {
+ /* Vcc to this host exists */
+ if (tmp->status > ESI_VC_PENDING) {
+ /*
+ * ESI_FLUSH_PENDING,
+ * ESI_FORWARD_DIRECT
+ */
+ entry->vcc = tmp->vcc;
+ entry->old_push=tmp->old_push;
+ }
+ entry->status=tmp->status;
+ break;
+ }
+ }
+ }
+ if (remoteflag)
+ entry->flags|=LEC_REMOTE_FLAG;
+ else
+ entry->flags&=~LEC_REMOTE_FLAG;
+ if (entry->status == ESI_ARP_PENDING ||
+ entry->status == ESI_UNKNOWN) {
+ entry->status = ESI_VC_PENDING;
+ send_to_lecd(priv, l_svc_setup, entry->mac_addr, atm_addr, NULL);
+ }
+ DPRINTK("After update2\n");
+ dump_arp_table(priv);
+out:
+ spin_unlock_irqrestore(&priv->lec_arp_lock, flags);
+}
+
+/*
+ * Notifies: Vcc setup ready
+ */
+static void
+lec_vcc_added(struct lec_priv *priv, struct atmlec_ioc *ioc_data,
+ struct atm_vcc *vcc,
+ void (*old_push)(struct atm_vcc *vcc, struct sk_buff *skb))
+{
+ unsigned long flags;
+ struct lec_arp_table *entry;
+ int i, found_entry=0;
+
+ spin_lock_irqsave(&priv->lec_arp_lock, flags);
+ if (ioc_data->receive == 2) {
+ /* Vcc for Multicast Forward. No timer, LANEv2 7.1.20 and 2.3.5.3 */
+
+ DPRINTK("LEC_ARP: Attaching mcast forward\n");
+#if 0
+ entry = lec_arp_find(priv, bus_mac);
+ if (!entry) {
+ printk("LEC_ARP: Multicast entry not found!\n");
+ goto out;
+ }
+ memcpy(entry->atm_addr, ioc_data->atm_addr, ATM_ESA_LEN);
+ entry->recv_vcc = vcc;
+ entry->old_recv_push = old_push;
+#endif
+ entry = make_entry(priv, bus_mac);
+ if (entry == NULL)
+ goto out;
+ del_timer(&entry->timer);
+ memcpy(entry->atm_addr, ioc_data->atm_addr, ATM_ESA_LEN);
+ entry->recv_vcc = vcc;
+ entry->old_recv_push = old_push;
+ entry->next = priv->mcast_fwds;
+ priv->mcast_fwds = entry;
+ goto out;
+ } else if (ioc_data->receive == 1) {
+ /* Vcc which we don't want to make default vcc, attach it
+ anyway. */
+ DPRINTK("LEC_ARP:Attaching data direct, not default :%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",
+ ioc_data->atm_addr[0],ioc_data->atm_addr[1],
+ ioc_data->atm_addr[2],ioc_data->atm_addr[3],
+ ioc_data->atm_addr[4],ioc_data->atm_addr[5],
+ ioc_data->atm_addr[6],ioc_data->atm_addr[7],
+ ioc_data->atm_addr[8],ioc_data->atm_addr[9],
+ ioc_data->atm_addr[10],ioc_data->atm_addr[11],
+ ioc_data->atm_addr[12],ioc_data->atm_addr[13],
+ ioc_data->atm_addr[14],ioc_data->atm_addr[15],
+ ioc_data->atm_addr[16],ioc_data->atm_addr[17],
+ ioc_data->atm_addr[18],ioc_data->atm_addr[19]);
+ entry = make_entry(priv, bus_mac);
+ if (entry == NULL)
+ goto out;
+ memcpy(entry->atm_addr, ioc_data->atm_addr, ATM_ESA_LEN);
+ memset(entry->mac_addr, 0, ETH_ALEN);
+ entry->recv_vcc = vcc;
+ entry->old_recv_push = old_push;
+ entry->status = ESI_UNKNOWN;
+ entry->timer.expires = jiffies + priv->vcc_timeout_period;
+ entry->timer.function = lec_arp_expire_vcc;
+ add_timer(&entry->timer);
+ entry->next = priv->lec_no_forward;
+ priv->lec_no_forward = entry;
+ dump_arp_table(priv);
+ goto out;
+ }
+ DPRINTK("LEC_ARP:Attaching data direct, default:%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",
+ ioc_data->atm_addr[0],ioc_data->atm_addr[1],
+ ioc_data->atm_addr[2],ioc_data->atm_addr[3],
+ ioc_data->atm_addr[4],ioc_data->atm_addr[5],
+ ioc_data->atm_addr[6],ioc_data->atm_addr[7],
+ ioc_data->atm_addr[8],ioc_data->atm_addr[9],
+ ioc_data->atm_addr[10],ioc_data->atm_addr[11],
+ ioc_data->atm_addr[12],ioc_data->atm_addr[13],
+ ioc_data->atm_addr[14],ioc_data->atm_addr[15],
+ ioc_data->atm_addr[16],ioc_data->atm_addr[17],
+ ioc_data->atm_addr[18],ioc_data->atm_addr[19]);
+ for (i = 0; i < LEC_ARP_TABLE_SIZE; i++) {
+ for (entry = priv->lec_arp_tables[i]; entry; entry=entry->next) {
+ if (memcmp(ioc_data->atm_addr, entry->atm_addr,
+ ATM_ESA_LEN)==0) {
+ DPRINTK("LEC_ARP: Attaching data direct\n");
+ DPRINTK("Currently -> Vcc: %d, Rvcc:%d\n",
+ entry->vcc?entry->vcc->vci:0,
+ entry->recv_vcc?entry->recv_vcc->vci:0);
+ found_entry=1;
+ del_timer(&entry->timer);
+ entry->vcc = vcc;
+ entry->old_push = old_push;
+ if (entry->status == ESI_VC_PENDING) {
+ if(priv->maximum_unknown_frame_count
+ ==0)
+ entry->status =
+ ESI_FORWARD_DIRECT;
+ else {
+ entry->timestamp = jiffies;
+ entry->status =
+ ESI_FLUSH_PENDING;
+#if 0
+ send_to_lecd(priv,l_flush_xmt,
+ NULL,
+ entry->atm_addr,
+ NULL);
+#endif
+ }
+ } else {
+ /* They were forming a connection
+ to us, and we to them. Our
+ ATM address is numerically lower
+ than theirs, so we make connection
+ we formed into default VCC (8.1.11).
+ Connection they made gets torn
+ down. This might confuse some
+ clients. Can be changed if
+ someone reports trouble... */
+ ;
+ }
+ }
+ }
+ }
+ if (found_entry) {
+ DPRINTK("After vcc was added\n");
+ dump_arp_table(priv);
+ goto out;
+ }
+ /* Not found, snatch address from first data packet that arrives from
+ this vcc */
+ entry = make_entry(priv, bus_mac);
+ if (!entry)
+ goto out;
+ entry->vcc = vcc;
+ entry->old_push = old_push;
+ memcpy(entry->atm_addr, ioc_data->atm_addr, ATM_ESA_LEN);
+ memset(entry->mac_addr, 0, ETH_ALEN);
+ entry->status = ESI_UNKNOWN;
+ entry->next = priv->lec_arp_empty_ones;
+ priv->lec_arp_empty_ones = entry;
+ entry->timer.expires = jiffies + priv->vcc_timeout_period;
+ entry->timer.function = lec_arp_expire_vcc;
+ add_timer(&entry->timer);
+ DPRINTK("After vcc was added\n");
+ dump_arp_table(priv);
+out:
+ spin_unlock_irqrestore(&priv->lec_arp_lock, flags);
+}
+
+static void
+lec_flush_complete(struct lec_priv *priv, unsigned long tran_id)
+{
+ unsigned long flags;
+ struct lec_arp_table *entry;
+ int i;
+
+ DPRINTK("LEC:lec_flush_complete %lx\n",tran_id);
+ spin_lock_irqsave(&priv->lec_arp_lock, flags);
+ for (i = 0; i < LEC_ARP_TABLE_SIZE; i++) {
+ for (entry = priv->lec_arp_tables[i]; entry; entry=entry->next) {
+ if (entry->flush_tran_id == tran_id &&
+ entry->status == ESI_FLUSH_PENDING) {
+ struct sk_buff *skb;
+
+ while ((skb = skb_dequeue(&entry->tx_wait)) != NULL)
+ lec_send(entry->vcc, skb, entry->priv);
+ entry->status = ESI_FORWARD_DIRECT;
+ DPRINTK("LEC_ARP: Flushed\n");
+ }
+ }
+ }
+ spin_unlock_irqrestore(&priv->lec_arp_lock, flags);
+ dump_arp_table(priv);
+}
+
+static void
+lec_set_flush_tran_id(struct lec_priv *priv,
+ unsigned char *atm_addr, unsigned long tran_id)
+{
+ unsigned long flags;
+ struct lec_arp_table *entry;
+ int i;
+
+ spin_lock_irqsave(&priv->lec_arp_lock, flags);
+ for (i = 0; i < LEC_ARP_TABLE_SIZE; i++)
+ for(entry = priv->lec_arp_tables[i]; entry; entry=entry->next)
+ if (!memcmp(atm_addr, entry->atm_addr, ATM_ESA_LEN)) {
+ entry->flush_tran_id = tran_id;
+ DPRINTK("Set flush transaction id to %lx for %p\n",tran_id,entry);
+ }
+ spin_unlock_irqrestore(&priv->lec_arp_lock, flags);
+}
+
+static int
+lec_mcast_make(struct lec_priv *priv, struct atm_vcc *vcc)
+{
+ unsigned long flags;
+ unsigned char mac_addr[] = {
+ 0xff, 0xff, 0xff, 0xff, 0xff, 0xff };
+ struct lec_arp_table *to_add;
+ struct lec_vcc_priv *vpriv;
+ int err = 0;
+
+ if (!(vpriv = kmalloc(sizeof(struct lec_vcc_priv), GFP_KERNEL)))
+ return -ENOMEM;
+ vpriv->xoff = 0;
+ vpriv->old_pop = vcc->pop;
+ vcc->user_back = vpriv;
+ vcc->pop = lec_pop;
+ spin_lock_irqsave(&priv->lec_arp_lock, flags);
+ to_add = make_entry(priv, mac_addr);
+ if (!to_add) {
+ vcc->pop = vpriv->old_pop;
+ kfree(vpriv);
+ err = -ENOMEM;
+ goto out;
+ }
+ memcpy(to_add->atm_addr, vcc->remote.sas_addr.prv, ATM_ESA_LEN);
+ to_add->status = ESI_FORWARD_DIRECT;
+ to_add->flags |= LEC_PERMANENT_FLAG;
+ to_add->vcc = vcc;
+ to_add->old_push = vcc->push;
+ vcc->push = lec_push;
+ priv->mcast_vcc = vcc;
+ lec_arp_add(priv, to_add);
+out:
+ spin_unlock_irqrestore(&priv->lec_arp_lock, flags);
+ return err;
+}
+
+static void
+lec_vcc_close(struct lec_priv *priv, struct atm_vcc *vcc)
+{
+ unsigned long flags;
+ struct lec_arp_table *entry, *next;
+ int i;
+
+ DPRINTK("LEC_ARP: lec_vcc_close vpi:%d vci:%d\n",vcc->vpi,vcc->vci);
+ dump_arp_table(priv);
+ spin_lock_irqsave(&priv->lec_arp_lock, flags);
+ for(i=0;i<LEC_ARP_TABLE_SIZE;i++) {
+ for(entry = priv->lec_arp_tables[i];entry; entry=next) {
+ next = entry->next;
+ if (vcc == entry->vcc) {
+ lec_arp_remove(priv, entry);
+ kfree(entry);
+ if (priv->mcast_vcc == vcc) {
+ priv->mcast_vcc = NULL;
+ }
+ }
+ }
+ }
+
+ entry = priv->lec_arp_empty_ones;
+ priv->lec_arp_empty_ones = NULL;
+ while (entry != NULL) {
+ next = entry->next;
+ if (entry->vcc == vcc) { /* leave it out from the list */
+ lec_arp_clear_vccs(entry);
+ del_timer(&entry->timer);
+ kfree(entry);
+ }
+ else { /* put it back to the list */
+ entry->next = priv->lec_arp_empty_ones;
+ priv->lec_arp_empty_ones = entry;
+ }
+ entry = next;
+ }
+
+ entry = priv->lec_no_forward;
+ priv->lec_no_forward = NULL;
+ while (entry != NULL) {
+ next = entry->next;
+ if (entry->recv_vcc == vcc) {
+ lec_arp_clear_vccs(entry);
+ del_timer(&entry->timer);
+ kfree(entry);
+ }
+ else {
+ entry->next = priv->lec_no_forward;
+ priv->lec_no_forward = entry;
+ }
+ entry = next;
+ }
+
+ entry = priv->mcast_fwds;
+ priv->mcast_fwds = NULL;
+ while (entry != NULL) {
+ next = entry->next;
+ if (entry->recv_vcc == vcc) {
+ lec_arp_clear_vccs(entry);
+ /* No timer, LANEv2 7.1.20 and 2.3.5.3 */
+ kfree(entry);
+ }
+ else {
+ entry->next = priv->mcast_fwds;
+ priv->mcast_fwds = entry;
+ }
+ entry = next;
+ }
+
+ spin_unlock_irqrestore(&priv->lec_arp_lock, flags);
+ dump_arp_table(priv);
+}
+
+static void
+lec_arp_check_empties(struct lec_priv *priv,
+ struct atm_vcc *vcc, struct sk_buff *skb)
+{
+ unsigned long flags;
+ struct lec_arp_table *entry, *prev;
+ struct lecdatahdr_8023 *hdr = (struct lecdatahdr_8023 *)skb->data;
+ unsigned char *src;
+#ifdef CONFIG_TR
+ struct lecdatahdr_8025 *tr_hdr = (struct lecdatahdr_8025 *)skb->data;
+
+ if (priv->is_trdev) src = tr_hdr->h_source;
+ else
+#endif
+ src = hdr->h_source;
+
+ spin_lock_irqsave(&priv->lec_arp_lock, flags);
+ entry = priv->lec_arp_empty_ones;
+ if (vcc == entry->vcc) {
+ del_timer(&entry->timer);
+ memcpy(entry->mac_addr, src, ETH_ALEN);
+ entry->status = ESI_FORWARD_DIRECT;
+ entry->last_used = jiffies;
+ priv->lec_arp_empty_ones = entry->next;
+ /* We might have got an entry */
+ if ((prev = lec_arp_find(priv,src))) {
+ lec_arp_remove(priv, prev);
+ kfree(prev);
+ }
+ lec_arp_add(priv, entry);
+ goto out;
+ }
+ prev = entry;
+ entry = entry->next;
+ while (entry && entry->vcc != vcc) {
+ prev= entry;
+ entry = entry->next;
+ }
+ if (!entry) {
+ DPRINTK("LEC_ARP: Arp_check_empties: entry not found!\n");
+ goto out;
+ }
+ del_timer(&entry->timer);
+ memcpy(entry->mac_addr, src, ETH_ALEN);
+ entry->status = ESI_FORWARD_DIRECT;
+ entry->last_used = jiffies;
+ prev->next = entry->next;
+ if ((prev = lec_arp_find(priv, src))) {
+ lec_arp_remove(priv, prev);
+ kfree(prev);
+ }
+ lec_arp_add(priv, entry);
+out:
+ spin_unlock_irqrestore(&priv->lec_arp_lock, flags);
+}
+MODULE_LICENSE("GPL");
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