diff options
Diffstat (limited to 'net/atm/lec.c')
| -rw-r--r-- | net/atm/lec.c | 2538 |
1 files changed, 2538 insertions, 0 deletions
diff --git a/net/atm/lec.c b/net/atm/lec.c new file mode 100644 index 00000000000..a0752487026 --- /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"); |