2576 lines
86 KiB
C
2576 lines
86 KiB
C
/*
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* lec.c: Lan Emulation driver
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* Marko Kiiskila mkiiskila@yahoo.com
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*
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*/
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#include <linux/config.h>
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#include <linux/kernel.h>
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#include <linux/bitops.h>
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/* We are ethernet device */
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#include <linux/if_ether.h>
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#include <linux/netdevice.h>
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#include <linux/etherdevice.h>
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#include <net/sock.h>
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#include <linux/skbuff.h>
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#include <linux/ip.h>
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#include <asm/byteorder.h>
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#include <asm/uaccess.h>
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#include <net/arp.h>
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#include <net/dst.h>
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#include <linux/proc_fs.h>
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#include <linux/spinlock.h>
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#include <linux/proc_fs.h>
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#include <linux/seq_file.h>
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/* TokenRing if needed */
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#ifdef CONFIG_TR
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#include <linux/trdevice.h>
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#endif
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/* And atm device */
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#include <linux/atmdev.h>
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#include <linux/atmlec.h>
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/* Proxy LEC knows about bridging */
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#if defined(CONFIG_BRIDGE) || defined(CONFIG_BRIDGE_MODULE)
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#include <linux/if_bridge.h>
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#include "../bridge/br_private.h"
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static unsigned char bridge_ula_lec[] = {0x01, 0x80, 0xc2, 0x00, 0x00};
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#endif
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/* Modular too */
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#include <linux/module.h>
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#include <linux/init.h>
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#include "lec.h"
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#include "lec_arpc.h"
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#include "resources.h"
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#if 0
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#define DPRINTK printk
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#else
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#define DPRINTK(format,args...)
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#endif
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#define DUMP_PACKETS 0 /* 0 = None,
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* 1 = 30 first bytes
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* 2 = Whole packet
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*/
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#define LEC_UNRES_QUE_LEN 8 /* number of tx packets to queue for a
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single destination while waiting for SVC */
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static int lec_open(struct net_device *dev);
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static int lec_start_xmit(struct sk_buff *skb, struct net_device *dev);
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static int lec_close(struct net_device *dev);
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static struct net_device_stats *lec_get_stats(struct net_device *dev);
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static void lec_init(struct net_device *dev);
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static struct lec_arp_table* lec_arp_find(struct lec_priv *priv,
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unsigned char *mac_addr);
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static int lec_arp_remove(struct lec_priv *priv,
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struct lec_arp_table *to_remove);
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/* LANE2 functions */
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static void lane2_associate_ind (struct net_device *dev, u8 *mac_address,
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u8 *tlvs, u32 sizeoftlvs);
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static int lane2_resolve(struct net_device *dev, u8 *dst_mac, int force,
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u8 **tlvs, u32 *sizeoftlvs);
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static int lane2_associate_req (struct net_device *dev, u8 *lan_dst,
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u8 *tlvs, u32 sizeoftlvs);
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static int lec_addr_delete(struct lec_priv *priv, unsigned char *atm_addr,
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unsigned long permanent);
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static void lec_arp_check_empties(struct lec_priv *priv,
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struct atm_vcc *vcc, struct sk_buff *skb);
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static void lec_arp_destroy(struct lec_priv *priv);
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static void lec_arp_init(struct lec_priv *priv);
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static struct atm_vcc* lec_arp_resolve(struct lec_priv *priv,
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unsigned char *mac_to_find,
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int is_rdesc,
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struct lec_arp_table **ret_entry);
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static void lec_arp_update(struct lec_priv *priv, unsigned char *mac_addr,
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unsigned char *atm_addr, unsigned long remoteflag,
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unsigned int targetless_le_arp);
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static void lec_flush_complete(struct lec_priv *priv, unsigned long tran_id);
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static int lec_mcast_make(struct lec_priv *priv, struct atm_vcc *vcc);
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static void lec_set_flush_tran_id(struct lec_priv *priv,
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unsigned char *atm_addr,
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unsigned long tran_id);
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static void lec_vcc_added(struct lec_priv *priv, struct atmlec_ioc *ioc_data,
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struct atm_vcc *vcc,
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void (*old_push)(struct atm_vcc *vcc, struct sk_buff *skb));
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static void lec_vcc_close(struct lec_priv *priv, struct atm_vcc *vcc);
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static struct lane2_ops lane2_ops = {
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lane2_resolve, /* resolve, spec 3.1.3 */
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lane2_associate_req, /* associate_req, spec 3.1.4 */
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NULL /* associate indicator, spec 3.1.5 */
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};
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static unsigned char bus_mac[ETH_ALEN] = {0xff,0xff,0xff,0xff,0xff,0xff};
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/* Device structures */
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static struct net_device *dev_lec[MAX_LEC_ITF];
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#if defined(CONFIG_BRIDGE) || defined(CONFIG_BRIDGE_MODULE)
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static void lec_handle_bridge(struct sk_buff *skb, struct net_device *dev)
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{
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struct ethhdr *eth;
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char *buff;
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struct lec_priv *priv;
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/* Check if this is a BPDU. If so, ask zeppelin to send
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* LE_TOPOLOGY_REQUEST with the same value of Topology Change bit
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* as the Config BPDU has */
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eth = (struct ethhdr *)skb->data;
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buff = skb->data + skb->dev->hard_header_len;
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if (*buff++ == 0x42 && *buff++ == 0x42 && *buff++ == 0x03) {
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struct sock *sk;
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struct sk_buff *skb2;
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struct atmlec_msg *mesg;
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skb2 = alloc_skb(sizeof(struct atmlec_msg), GFP_ATOMIC);
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if (skb2 == NULL) return;
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skb2->len = sizeof(struct atmlec_msg);
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mesg = (struct atmlec_msg *)skb2->data;
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mesg->type = l_topology_change;
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buff += 4;
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mesg->content.normal.flag = *buff & 0x01; /* 0x01 is topology change */
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priv = (struct lec_priv *)dev->priv;
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atm_force_charge(priv->lecd, skb2->truesize);
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sk = sk_atm(priv->lecd);
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skb_queue_tail(&sk->sk_receive_queue, skb2);
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sk->sk_data_ready(sk, skb2->len);
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}
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return;
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}
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#endif /* defined(CONFIG_BRIDGE) || defined(CONFIG_BRIDGE_MODULE) */
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/*
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* Modelled after tr_type_trans
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* All multicast and ARE or STE frames go to BUS.
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* Non source routed frames go by destination address.
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* Last hop source routed frames go by destination address.
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* Not last hop source routed frames go by _next_ route descriptor.
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* Returns pointer to destination MAC address or fills in rdesc
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* and returns NULL.
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*/
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#ifdef CONFIG_TR
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static unsigned char *get_tr_dst(unsigned char *packet, unsigned char *rdesc)
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{
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struct trh_hdr *trh;
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int riflen, num_rdsc;
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trh = (struct trh_hdr *)packet;
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if (trh->daddr[0] & (uint8_t)0x80)
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return bus_mac; /* multicast */
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if (trh->saddr[0] & TR_RII) {
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riflen = (ntohs(trh->rcf) & TR_RCF_LEN_MASK) >> 8;
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if ((ntohs(trh->rcf) >> 13) != 0)
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return bus_mac; /* ARE or STE */
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}
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else
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return trh->daddr; /* not source routed */
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if (riflen < 6)
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return trh->daddr; /* last hop, source routed */
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/* riflen is 6 or more, packet has more than one route descriptor */
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num_rdsc = (riflen/2) - 1;
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memset(rdesc, 0, ETH_ALEN);
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/* offset 4 comes from LAN destination field in LE control frames */
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if (trh->rcf & htons((uint16_t)TR_RCF_DIR_BIT))
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memcpy(&rdesc[4], &trh->rseg[num_rdsc-2], sizeof(uint16_t));
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else {
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memcpy(&rdesc[4], &trh->rseg[1], sizeof(uint16_t));
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rdesc[5] = ((ntohs(trh->rseg[0]) & 0x000f) | (rdesc[5] & 0xf0));
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}
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return NULL;
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}
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#endif /* CONFIG_TR */
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/*
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* Open/initialize the netdevice. This is called (in the current kernel)
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* sometime after booting when the 'ifconfig' program is run.
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*
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* This routine should set everything up anew at each open, even
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* registers that "should" only need to be set once at boot, so that
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* there is non-reboot way to recover if something goes wrong.
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*/
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static int
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lec_open(struct net_device *dev)
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{
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struct lec_priv *priv = (struct lec_priv *)dev->priv;
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netif_start_queue(dev);
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memset(&priv->stats,0,sizeof(struct net_device_stats));
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return 0;
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}
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static __inline__ void
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lec_send(struct atm_vcc *vcc, struct sk_buff *skb, struct lec_priv *priv)
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{
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ATM_SKB(skb)->vcc = vcc;
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ATM_SKB(skb)->atm_options = vcc->atm_options;
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atomic_add(skb->truesize, &sk_atm(vcc)->sk_wmem_alloc);
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if (vcc->send(vcc, skb) < 0) {
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priv->stats.tx_dropped++;
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return;
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}
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priv->stats.tx_packets++;
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priv->stats.tx_bytes += skb->len;
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}
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static void
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lec_tx_timeout(struct net_device *dev)
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{
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printk(KERN_INFO "%s: tx timeout\n", dev->name);
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dev->trans_start = jiffies;
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netif_wake_queue(dev);
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}
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static int
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lec_start_xmit(struct sk_buff *skb, struct net_device *dev)
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{
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struct sk_buff *skb2;
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struct lec_priv *priv = (struct lec_priv *)dev->priv;
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struct lecdatahdr_8023 *lec_h;
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struct atm_vcc *vcc;
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struct lec_arp_table *entry;
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unsigned char *dst;
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int min_frame_size;
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#ifdef CONFIG_TR
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unsigned char rdesc[ETH_ALEN]; /* Token Ring route descriptor */
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#endif
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int is_rdesc;
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#if DUMP_PACKETS > 0
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char buf[300];
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int i=0;
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#endif /* DUMP_PACKETS >0 */
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DPRINTK("lec_start_xmit called\n");
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if (!priv->lecd) {
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printk("%s:No lecd attached\n",dev->name);
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priv->stats.tx_errors++;
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netif_stop_queue(dev);
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return -EUNATCH;
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}
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DPRINTK("skbuff head:%lx data:%lx tail:%lx end:%lx\n",
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(long)skb->head, (long)skb->data, (long)skb->tail,
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(long)skb->end);
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#if defined(CONFIG_BRIDGE) || defined(CONFIG_BRIDGE_MODULE)
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if (memcmp(skb->data, bridge_ula_lec, sizeof(bridge_ula_lec)) == 0)
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lec_handle_bridge(skb, dev);
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#endif
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/* Make sure we have room for lec_id */
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if (skb_headroom(skb) < 2) {
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DPRINTK("lec_start_xmit: reallocating skb\n");
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skb2 = skb_realloc_headroom(skb, LEC_HEADER_LEN);
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kfree_skb(skb);
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if (skb2 == NULL) return 0;
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skb = skb2;
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}
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skb_push(skb, 2);
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/* Put le header to place, works for TokenRing too */
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lec_h = (struct lecdatahdr_8023*)skb->data;
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lec_h->le_header = htons(priv->lecid);
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#ifdef CONFIG_TR
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/* Ugly. Use this to realign Token Ring packets for
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* e.g. PCA-200E driver. */
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if (priv->is_trdev) {
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skb2 = skb_realloc_headroom(skb, LEC_HEADER_LEN);
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kfree_skb(skb);
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if (skb2 == NULL) return 0;
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skb = skb2;
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}
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#endif
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#if DUMP_PACKETS > 0
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printk("%s: send datalen:%ld lecid:%4.4x\n", dev->name,
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skb->len, priv->lecid);
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#if DUMP_PACKETS >= 2
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for(i=0;i<skb->len && i <99;i++) {
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sprintf(buf+i*3,"%2.2x ",0xff&skb->data[i]);
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}
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#elif DUMP_PACKETS >= 1
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for(i=0;i<skb->len && i < 30;i++) {
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sprintf(buf+i*3,"%2.2x ", 0xff&skb->data[i]);
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}
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#endif /* DUMP_PACKETS >= 1 */
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if (i==skb->len)
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printk("%s\n",buf);
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else
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printk("%s...\n",buf);
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#endif /* DUMP_PACKETS > 0 */
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/* Minimum ethernet-frame size */
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#ifdef CONFIG_TR
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if (priv->is_trdev)
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min_frame_size = LEC_MINIMUM_8025_SIZE;
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else
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#endif
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min_frame_size = LEC_MINIMUM_8023_SIZE;
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if (skb->len < min_frame_size) {
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if ((skb->len + skb_tailroom(skb)) < min_frame_size) {
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skb2 = skb_copy_expand(skb, 0,
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min_frame_size - skb->truesize, GFP_ATOMIC);
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dev_kfree_skb(skb);
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if (skb2 == NULL) {
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priv->stats.tx_dropped++;
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return 0;
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}
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skb = skb2;
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}
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skb_put(skb, min_frame_size - skb->len);
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}
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/* Send to right vcc */
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is_rdesc = 0;
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dst = lec_h->h_dest;
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#ifdef CONFIG_TR
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if (priv->is_trdev) {
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dst = get_tr_dst(skb->data+2, rdesc);
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if (dst == NULL) {
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dst = rdesc;
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is_rdesc = 1;
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}
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}
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#endif
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entry = NULL;
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vcc = lec_arp_resolve(priv, dst, is_rdesc, &entry);
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DPRINTK("%s:vcc:%p vcc_flags:%x, entry:%p\n", dev->name,
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vcc, vcc?vcc->flags:0, entry);
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if (!vcc || !test_bit(ATM_VF_READY,&vcc->flags)) {
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if (entry && (entry->tx_wait.qlen < LEC_UNRES_QUE_LEN)) {
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DPRINTK("%s:lec_start_xmit: queuing packet, ", dev->name);
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DPRINTK("MAC address 0x%02x:%02x:%02x:%02x:%02x:%02x\n",
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lec_h->h_dest[0], lec_h->h_dest[1], lec_h->h_dest[2],
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lec_h->h_dest[3], lec_h->h_dest[4], lec_h->h_dest[5]);
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skb_queue_tail(&entry->tx_wait, skb);
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} else {
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DPRINTK("%s:lec_start_xmit: tx queue full or no arp entry, dropping, ", dev->name);
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DPRINTK("MAC address 0x%02x:%02x:%02x:%02x:%02x:%02x\n",
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lec_h->h_dest[0], lec_h->h_dest[1], lec_h->h_dest[2],
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lec_h->h_dest[3], lec_h->h_dest[4], lec_h->h_dest[5]);
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priv->stats.tx_dropped++;
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dev_kfree_skb(skb);
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}
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return 0;
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}
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#if DUMP_PACKETS > 0
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printk("%s:sending to vpi:%d vci:%d\n", dev->name,
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vcc->vpi, vcc->vci);
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#endif /* DUMP_PACKETS > 0 */
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while (entry && (skb2 = skb_dequeue(&entry->tx_wait))) {
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DPRINTK("lec.c: emptying tx queue, ");
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DPRINTK("MAC address 0x%02x:%02x:%02x:%02x:%02x:%02x\n",
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lec_h->h_dest[0], lec_h->h_dest[1], lec_h->h_dest[2],
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lec_h->h_dest[3], lec_h->h_dest[4], lec_h->h_dest[5]);
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lec_send(vcc, skb2, priv);
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}
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lec_send(vcc, skb, priv);
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if (!atm_may_send(vcc, 0)) {
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struct lec_vcc_priv *vpriv = LEC_VCC_PRIV(vcc);
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vpriv->xoff = 1;
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netif_stop_queue(dev);
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/*
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* vcc->pop() might have occurred in between, making
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* the vcc usuable again. Since xmit is serialized,
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* this is the only situation we have to re-test.
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*/
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if (atm_may_send(vcc, 0))
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netif_wake_queue(dev);
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}
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dev->trans_start = jiffies;
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return 0;
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}
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/* The inverse routine to net_open(). */
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static int
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lec_close(struct net_device *dev)
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{
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netif_stop_queue(dev);
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return 0;
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}
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/*
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* Get the current statistics.
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* This may be called with the card open or closed.
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*/
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static struct net_device_stats *
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lec_get_stats(struct net_device *dev)
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{
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return &((struct lec_priv *)dev->priv)->stats;
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}
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static int
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lec_atm_send(struct atm_vcc *vcc, struct sk_buff *skb)
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{
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unsigned long flags;
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struct net_device *dev = (struct net_device*)vcc->proto_data;
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struct lec_priv *priv = (struct lec_priv*)dev->priv;
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struct atmlec_msg *mesg;
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struct lec_arp_table *entry;
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int i;
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char *tmp; /* FIXME */
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atomic_sub(skb->truesize, &sk_atm(vcc)->sk_wmem_alloc);
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mesg = (struct atmlec_msg *)skb->data;
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tmp = skb->data;
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tmp += sizeof(struct atmlec_msg);
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DPRINTK("%s: msg from zeppelin:%d\n", dev->name, mesg->type);
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switch(mesg->type) {
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case l_set_mac_addr:
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for (i=0;i<6;i++) {
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dev->dev_addr[i] = mesg->content.normal.mac_addr[i];
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}
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break;
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case l_del_mac_addr:
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for(i=0;i<6;i++) {
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dev->dev_addr[i] = 0;
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}
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break;
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case l_addr_delete:
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lec_addr_delete(priv, mesg->content.normal.atm_addr,
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|
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 };
|
|
|
|
#define LEC_DATA_DIRECT_8023 2
|
|
#define LEC_DATA_DIRECT_8025 3
|
|
|
|
static int lec_is_data_direct(struct atm_vcc *vcc)
|
|
{
|
|
return ((vcc->sap.blli[0].l3.tr9577.snap[4] == LEC_DATA_DIRECT_8023) ||
|
|
(vcc->sap.blli[0].l3.tr9577.snap[4] == LEC_DATA_DIRECT_8025));
|
|
}
|
|
|
|
static void
|
|
lec_push(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;
|
|
|
|
#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 */
|
|
struct lec_arp_table *entry;
|
|
unsigned char *src, *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 this is a Data Direct VCC, and the VCC does not match
|
|
* the LE_ARP cache entry, delete the LE_ARP cache entry.
|
|
*/
|
|
spin_lock_irqsave(&priv->lec_arp_lock, flags);
|
|
if (lec_is_data_direct(vcc)) {
|
|
#ifdef CONFIG_TR
|
|
if (priv->is_trdev)
|
|
src = ((struct lecdatahdr_8025 *) skb->data)->h_source;
|
|
else
|
|
#endif
|
|
src = ((struct lecdatahdr_8023 *) skb->data)->h_source;
|
|
entry = lec_arp_find(priv, src);
|
|
if (entry && entry->vcc != vcc) {
|
|
lec_arp_remove(priv, entry);
|
|
kfree(entry);
|
|
}
|
|
}
|
|
spin_unlock_irqrestore(&priv->lec_arp_lock, flags);
|
|
|
|
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;
|
|
}
|
|
/* If the LE_ARP cache entry is still pending, reset count to 0
|
|
* so another LE_ARP request can be made for this frame.
|
|
*/
|
|
if (entry->status == ESI_ARP_PENDING) {
|
|
entry->no_tries = 0;
|
|
}
|
|
/* 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");
|