/* net/atm/clip.c - RFC1577 Classical IP over ATM */
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/* net/atm/clip.c - RFC1577 Classical IP over ATM */
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/* Written 1995-2000 by Werner Almesberger, EPFL LRC/ICA */
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/* Written 1995-2000 by Werner Almesberger, EPFL LRC/ICA */
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#include <linux/config.h>
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#include <linux/config.h>
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#include <linux/string.h>
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#include <linux/string.h>
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#include <linux/errno.h>
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#include <linux/errno.h>
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#include <linux/kernel.h> /* for UINT_MAX */
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#include <linux/kernel.h> /* for UINT_MAX */
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#include <linux/module.h>
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#include <linux/module.h>
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#include <linux/init.h>
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#include <linux/init.h>
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#include <linux/netdevice.h>
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#include <linux/netdevice.h>
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#include <linux/skbuff.h>
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#include <linux/skbuff.h>
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#include <linux/wait.h>
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#include <linux/wait.h>
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#include <linux/timer.h>
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#include <linux/timer.h>
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#include <linux/if_arp.h> /* for some manifest constants */
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#include <linux/if_arp.h> /* for some manifest constants */
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#include <linux/notifier.h>
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#include <linux/notifier.h>
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#include <linux/atm.h>
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#include <linux/atm.h>
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#include <linux/atmdev.h>
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#include <linux/atmdev.h>
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#include <linux/atmclip.h>
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#include <linux/atmclip.h>
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#include <linux/atmarp.h>
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#include <linux/atmarp.h>
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#include <linux/ip.h> /* for net/route.h */
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#include <linux/ip.h> /* for net/route.h */
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#include <linux/in.h> /* for struct sockaddr_in */
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#include <linux/in.h> /* for struct sockaddr_in */
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#include <linux/if.h> /* for IFF_UP */
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#include <linux/if.h> /* for IFF_UP */
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#include <linux/inetdevice.h>
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#include <linux/inetdevice.h>
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#include <linux/bitops.h>
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#include <linux/bitops.h>
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#include <net/route.h> /* for struct rtable and routing */
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#include <net/route.h> /* for struct rtable and routing */
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#include <net/icmp.h> /* icmp_send */
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#include <net/icmp.h> /* icmp_send */
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#include <asm/param.h> /* for HZ */
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#include <asm/param.h> /* for HZ */
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#include <asm/byteorder.h> /* for htons etc. */
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#include <asm/byteorder.h> /* for htons etc. */
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#include <asm/system.h> /* save/restore_flags */
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#include <asm/system.h> /* save/restore_flags */
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#include <asm/uaccess.h>
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#include <asm/uaccess.h>
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#include <asm/atomic.h>
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#include <asm/atomic.h>
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#include "common.h"
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#include "common.h"
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#include "resources.h"
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#include "resources.h"
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#include "ipcommon.h"
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#include "ipcommon.h"
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#include <net/atmclip.h>
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#include <net/atmclip.h>
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#if 0
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#if 0
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#define DPRINTK(format,args...) printk(format,##args)
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#define DPRINTK(format,args...) printk(format,##args)
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#else
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#else
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#define DPRINTK(format,args...)
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#define DPRINTK(format,args...)
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#endif
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#endif
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struct net_device *clip_devs = NULL;
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struct net_device *clip_devs = NULL;
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struct atm_vcc *atmarpd = NULL;
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struct atm_vcc *atmarpd = NULL;
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static struct neigh_table clip_tbl;
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static struct neigh_table clip_tbl;
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static struct timer_list idle_timer;
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static struct timer_list idle_timer;
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static int start_timer = 1;
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static int start_timer = 1;
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static int to_atmarpd(enum atmarp_ctrl_type type,int itf,unsigned long ip)
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static int to_atmarpd(enum atmarp_ctrl_type type,int itf,unsigned long ip)
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{
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{
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struct atmarp_ctrl *ctrl;
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struct atmarp_ctrl *ctrl;
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struct sk_buff *skb;
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struct sk_buff *skb;
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DPRINTK("to_atmarpd(%d)\n",type);
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DPRINTK("to_atmarpd(%d)\n",type);
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if (!atmarpd) return -EUNATCH;
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if (!atmarpd) return -EUNATCH;
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skb = alloc_skb(sizeof(struct atmarp_ctrl),GFP_ATOMIC);
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skb = alloc_skb(sizeof(struct atmarp_ctrl),GFP_ATOMIC);
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if (!skb) return -ENOMEM;
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if (!skb) return -ENOMEM;
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ctrl = (struct atmarp_ctrl *) skb_put(skb,sizeof(struct atmarp_ctrl));
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ctrl = (struct atmarp_ctrl *) skb_put(skb,sizeof(struct atmarp_ctrl));
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ctrl->type = type;
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ctrl->type = type;
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ctrl->itf_num = itf;
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ctrl->itf_num = itf;
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ctrl->ip = ip;
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ctrl->ip = ip;
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atm_force_charge(atmarpd,skb->truesize);
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atm_force_charge(atmarpd,skb->truesize);
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skb_queue_tail(&atmarpd->sk->receive_queue,skb);
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skb_queue_tail(&atmarpd->sk->receive_queue,skb);
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wake_up(&atmarpd->sleep);
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wake_up(&atmarpd->sleep);
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return 0;
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return 0;
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}
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}
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static void link_vcc(struct clip_vcc *clip_vcc,struct atmarp_entry *entry)
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static void link_vcc(struct clip_vcc *clip_vcc,struct atmarp_entry *entry)
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{
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{
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DPRINTK("link_vcc %p to entry %p (neigh %p)\n",clip_vcc,entry,
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DPRINTK("link_vcc %p to entry %p (neigh %p)\n",clip_vcc,entry,
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entry->neigh);
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entry->neigh);
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clip_vcc->entry = entry;
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clip_vcc->entry = entry;
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clip_vcc->xoff = 0; /* @@@ may overrun buffer by one packet */
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clip_vcc->xoff = 0; /* @@@ may overrun buffer by one packet */
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clip_vcc->next = entry->vccs;
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clip_vcc->next = entry->vccs;
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entry->vccs = clip_vcc;
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entry->vccs = clip_vcc;
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entry->neigh->used = jiffies;
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entry->neigh->used = jiffies;
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}
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}
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static void unlink_clip_vcc(struct clip_vcc *clip_vcc)
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static void unlink_clip_vcc(struct clip_vcc *clip_vcc)
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{
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{
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struct atmarp_entry *entry = clip_vcc->entry;
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struct atmarp_entry *entry = clip_vcc->entry;
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struct clip_vcc **walk;
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struct clip_vcc **walk;
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if (!entry) {
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if (!entry) {
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printk(KERN_CRIT "!clip_vcc->entry (clip_vcc %p)\n",clip_vcc);
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printk(KERN_CRIT "!clip_vcc->entry (clip_vcc %p)\n",clip_vcc);
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return;
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return;
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}
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}
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spin_lock_bh(&entry->neigh->dev->xmit_lock); /* block clip_start_xmit() */
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spin_lock_bh(&entry->neigh->dev->xmit_lock); /* block clip_start_xmit() */
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entry->neigh->used = jiffies;
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entry->neigh->used = jiffies;
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for (walk = &entry->vccs; *walk; walk = &(*walk)->next)
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for (walk = &entry->vccs; *walk; walk = &(*walk)->next)
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if (*walk == clip_vcc) {
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if (*walk == clip_vcc) {
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int error;
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int error;
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*walk = clip_vcc->next; /* atomic */
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*walk = clip_vcc->next; /* atomic */
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clip_vcc->entry = NULL;
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clip_vcc->entry = NULL;
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if (clip_vcc->xoff)
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if (clip_vcc->xoff)
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netif_wake_queue(entry->neigh->dev);
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netif_wake_queue(entry->neigh->dev);
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if (entry->vccs)
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if (entry->vccs)
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goto out;
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goto out;
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entry->expires = jiffies-1;
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entry->expires = jiffies-1;
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/* force resolution or expiration */
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/* force resolution or expiration */
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error = neigh_update(entry->neigh,NULL,NUD_NONE,0,0);
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error = neigh_update(entry->neigh,NULL,NUD_NONE,0,0);
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if (error)
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if (error)
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printk(KERN_CRIT "unlink_clip_vcc: "
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printk(KERN_CRIT "unlink_clip_vcc: "
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"neigh_update failed with %d\n",error);
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"neigh_update failed with %d\n",error);
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goto out;
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goto out;
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}
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}
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printk(KERN_CRIT "ATMARP: unlink_clip_vcc failed (entry %p, vcc "
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printk(KERN_CRIT "ATMARP: unlink_clip_vcc failed (entry %p, vcc "
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"0x%p)\n",entry,clip_vcc);
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"0x%p)\n",entry,clip_vcc);
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out:
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out:
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spin_unlock_bh(&entry->neigh->dev->xmit_lock);
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spin_unlock_bh(&entry->neigh->dev->xmit_lock);
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}
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}
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static void idle_timer_check(unsigned long dummy)
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static void idle_timer_check(unsigned long dummy)
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{
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{
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int i;
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int i;
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/*DPRINTK("idle_timer_check\n");*/
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/*DPRINTK("idle_timer_check\n");*/
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write_lock(&clip_tbl.lock);
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write_lock(&clip_tbl.lock);
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for (i = 0; i <= NEIGH_HASHMASK; i++) {
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for (i = 0; i <= NEIGH_HASHMASK; i++) {
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struct neighbour **np;
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struct neighbour **np;
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for (np = &clip_tbl.hash_buckets[i]; *np;) {
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for (np = &clip_tbl.hash_buckets[i]; *np;) {
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struct neighbour *n = *np;
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struct neighbour *n = *np;
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struct atmarp_entry *entry = NEIGH2ENTRY(n);
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struct atmarp_entry *entry = NEIGH2ENTRY(n);
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struct clip_vcc *clip_vcc;
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struct clip_vcc *clip_vcc;
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write_lock(&n->lock);
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write_lock(&n->lock);
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for (clip_vcc = entry->vccs; clip_vcc;
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for (clip_vcc = entry->vccs; clip_vcc;
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clip_vcc = clip_vcc->next)
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clip_vcc = clip_vcc->next)
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if (clip_vcc->idle_timeout &&
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if (clip_vcc->idle_timeout &&
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time_after(jiffies, clip_vcc->last_use+
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time_after(jiffies, clip_vcc->last_use+
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clip_vcc->idle_timeout)) {
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clip_vcc->idle_timeout)) {
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DPRINTK("releasing vcc %p->%p of "
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DPRINTK("releasing vcc %p->%p of "
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"entry %p\n",clip_vcc,clip_vcc->vcc,
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"entry %p\n",clip_vcc,clip_vcc->vcc,
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entry);
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entry);
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vcc_release_async(clip_vcc->vcc,
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vcc_release_async(clip_vcc->vcc,
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-ETIMEDOUT);
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-ETIMEDOUT);
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}
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}
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if (entry->vccs ||
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if (entry->vccs ||
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time_before(jiffies, entry->expires)) {
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time_before(jiffies, entry->expires)) {
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np = &n->next;
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np = &n->next;
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write_unlock(&n->lock);
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write_unlock(&n->lock);
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continue;
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continue;
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}
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}
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if (atomic_read(&n->refcnt) > 1) {
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if (atomic_read(&n->refcnt) > 1) {
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struct sk_buff *skb;
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struct sk_buff *skb;
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DPRINTK("destruction postponed with ref %d\n",
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DPRINTK("destruction postponed with ref %d\n",
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atomic_read(&n->refcnt));
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atomic_read(&n->refcnt));
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while ((skb = skb_dequeue(&n->arp_queue)) !=
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while ((skb = skb_dequeue(&n->arp_queue)) !=
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NULL)
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NULL)
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dev_kfree_skb(skb);
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dev_kfree_skb(skb);
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np = &n->next;
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np = &n->next;
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write_unlock(&n->lock);
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write_unlock(&n->lock);
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continue;
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continue;
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}
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}
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*np = n->next;
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*np = n->next;
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DPRINTK("expired neigh %p\n",n);
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DPRINTK("expired neigh %p\n",n);
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n->dead = 1;
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n->dead = 1;
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write_unlock(&n->lock);
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write_unlock(&n->lock);
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neigh_release(n);
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neigh_release(n);
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}
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}
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}
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}
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mod_timer(&idle_timer, jiffies+CLIP_CHECK_INTERVAL*HZ);
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mod_timer(&idle_timer, jiffies+CLIP_CHECK_INTERVAL*HZ);
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write_unlock(&clip_tbl.lock);
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write_unlock(&clip_tbl.lock);
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}
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}
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static int clip_arp_rcv(struct sk_buff *skb)
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static int clip_arp_rcv(struct sk_buff *skb)
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{
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{
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struct atm_vcc *vcc;
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struct atm_vcc *vcc;
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DPRINTK("clip_arp_rcv\n");
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DPRINTK("clip_arp_rcv\n");
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vcc = ATM_SKB(skb)->vcc;
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vcc = ATM_SKB(skb)->vcc;
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if (!vcc || !atm_charge(vcc,skb->truesize)) {
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if (!vcc || !atm_charge(vcc,skb->truesize)) {
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dev_kfree_skb_any(skb);
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dev_kfree_skb_any(skb);
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return 0;
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return 0;
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}
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}
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DPRINTK("pushing to %p\n",vcc);
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DPRINTK("pushing to %p\n",vcc);
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DPRINTK("using %p\n",CLIP_VCC(vcc)->old_push);
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DPRINTK("using %p\n",CLIP_VCC(vcc)->old_push);
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CLIP_VCC(vcc)->old_push(vcc,skb);
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CLIP_VCC(vcc)->old_push(vcc,skb);
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return 0;
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return 0;
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}
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}
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static void clip_push(struct atm_vcc *vcc,struct sk_buff *skb)
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static void clip_push(struct atm_vcc *vcc,struct sk_buff *skb)
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{
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{
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struct clip_vcc *clip_vcc = CLIP_VCC(vcc);
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struct clip_vcc *clip_vcc = CLIP_VCC(vcc);
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DPRINTK("clip push\n");
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DPRINTK("clip push\n");
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if (!skb) {
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if (!skb) {
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DPRINTK("removing VCC %p\n",clip_vcc);
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DPRINTK("removing VCC %p\n",clip_vcc);
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if (clip_vcc->entry) unlink_clip_vcc(clip_vcc);
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if (clip_vcc->entry) unlink_clip_vcc(clip_vcc);
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clip_vcc->old_push(vcc,NULL); /* pass on the bad news */
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clip_vcc->old_push(vcc,NULL); /* pass on the bad news */
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kfree(clip_vcc);
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kfree(clip_vcc);
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return;
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return;
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}
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}
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atm_return(vcc,skb->truesize);
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atm_return(vcc,skb->truesize);
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skb->dev = clip_vcc->entry ? clip_vcc->entry->neigh->dev : clip_devs;
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skb->dev = clip_vcc->entry ? clip_vcc->entry->neigh->dev : clip_devs;
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/* clip_vcc->entry == NULL if we don't have an IP address yet */
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/* clip_vcc->entry == NULL if we don't have an IP address yet */
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if (!skb->dev) {
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if (!skb->dev) {
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dev_kfree_skb_any(skb);
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dev_kfree_skb_any(skb);
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return;
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return;
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}
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}
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ATM_SKB(skb)->vcc = vcc;
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ATM_SKB(skb)->vcc = vcc;
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skb->mac.raw = skb->data;
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skb->mac.raw = skb->data;
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if (!clip_vcc->encap || skb->len < RFC1483LLC_LEN || memcmp(skb->data,
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if (!clip_vcc->encap || skb->len < RFC1483LLC_LEN || memcmp(skb->data,
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llc_oui,sizeof(llc_oui))) skb->protocol = htons(ETH_P_IP);
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llc_oui,sizeof(llc_oui))) skb->protocol = htons(ETH_P_IP);
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else {
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else {
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skb->protocol = ((u16 *) skb->data)[3];
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skb->protocol = ((u16 *) skb->data)[3];
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skb_pull(skb,RFC1483LLC_LEN);
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skb_pull(skb,RFC1483LLC_LEN);
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if (skb->protocol == htons(ETH_P_ARP)) {
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if (skb->protocol == htons(ETH_P_ARP)) {
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PRIV(skb->dev)->stats.rx_packets++;
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PRIV(skb->dev)->stats.rx_packets++;
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PRIV(skb->dev)->stats.rx_bytes += skb->len;
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PRIV(skb->dev)->stats.rx_bytes += skb->len;
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clip_arp_rcv(skb);
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clip_arp_rcv(skb);
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return;
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return;
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}
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}
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}
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}
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clip_vcc->last_use = jiffies;
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clip_vcc->last_use = jiffies;
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PRIV(skb->dev)->stats.rx_packets++;
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PRIV(skb->dev)->stats.rx_packets++;
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PRIV(skb->dev)->stats.rx_bytes += skb->len;
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PRIV(skb->dev)->stats.rx_bytes += skb->len;
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memset(ATM_SKB(skb), 0, sizeof(struct atm_skb_data));
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memset(ATM_SKB(skb), 0, sizeof(struct atm_skb_data));
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netif_rx(skb);
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netif_rx(skb);
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}
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}
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/*
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/*
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* Note: these spinlocks _must_not_ block on non-SMP. The only goal is that
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* Note: these spinlocks _must_not_ block on non-SMP. The only goal is that
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* clip_pop is atomic with respect to the critical section in clip_start_xmit.
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* clip_pop is atomic with respect to the critical section in clip_start_xmit.
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*/
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*/
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static void clip_pop(struct atm_vcc *vcc,struct sk_buff *skb)
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static void clip_pop(struct atm_vcc *vcc,struct sk_buff *skb)
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{
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{
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struct clip_vcc *clip_vcc = CLIP_VCC(vcc);
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struct clip_vcc *clip_vcc = CLIP_VCC(vcc);
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struct net_device *dev = skb->dev;
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struct net_device *dev = skb->dev;
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int old;
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int old;
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unsigned long flags;
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unsigned long flags;
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DPRINTK("clip_pop(vcc %p)\n",vcc);
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DPRINTK("clip_pop(vcc %p)\n",vcc);
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clip_vcc->old_pop(vcc,skb);
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clip_vcc->old_pop(vcc,skb);
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/* skb->dev == NULL in outbound ARP packets */
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/* skb->dev == NULL in outbound ARP packets */
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if (!dev) return;
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if (!dev) return;
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spin_lock_irqsave(&PRIV(dev)->xoff_lock,flags);
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spin_lock_irqsave(&PRIV(dev)->xoff_lock,flags);
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if (atm_may_send(vcc,0)) {
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if (atm_may_send(vcc,0)) {
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old = xchg(&clip_vcc->xoff,0);
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old = xchg(&clip_vcc->xoff,0);
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if (old) netif_wake_queue(dev);
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if (old) netif_wake_queue(dev);
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}
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}
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spin_unlock_irqrestore(&PRIV(dev)->xoff_lock,flags);
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spin_unlock_irqrestore(&PRIV(dev)->xoff_lock,flags);
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}
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}
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static void clip_neigh_destroy(struct neighbour *neigh)
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static void clip_neigh_destroy(struct neighbour *neigh)
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{
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{
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DPRINTK("clip_neigh_destroy (neigh %p)\n",neigh);
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DPRINTK("clip_neigh_destroy (neigh %p)\n",neigh);
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if (NEIGH2ENTRY(neigh)->vccs)
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if (NEIGH2ENTRY(neigh)->vccs)
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printk(KERN_CRIT "clip_neigh_destroy: vccs != NULL !!!\n");
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printk(KERN_CRIT "clip_neigh_destroy: vccs != NULL !!!\n");
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NEIGH2ENTRY(neigh)->vccs = (void *) 0xdeadbeef;
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NEIGH2ENTRY(neigh)->vccs = (void *) 0xdeadbeef;
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}
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}
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static void clip_neigh_solicit(struct neighbour *neigh,struct sk_buff *skb)
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static void clip_neigh_solicit(struct neighbour *neigh,struct sk_buff *skb)
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{
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{
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DPRINTK("clip_neigh_solicit (neigh %p, skb %p)\n",neigh,skb);
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DPRINTK("clip_neigh_solicit (neigh %p, skb %p)\n",neigh,skb);
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to_atmarpd(act_need,PRIV(neigh->dev)->number,NEIGH2ENTRY(neigh)->ip);
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to_atmarpd(act_need,PRIV(neigh->dev)->number,NEIGH2ENTRY(neigh)->ip);
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}
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}
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static void clip_neigh_error(struct neighbour *neigh,struct sk_buff *skb)
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static void clip_neigh_error(struct neighbour *neigh,struct sk_buff *skb)
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{
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{
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#ifndef CONFIG_ATM_CLIP_NO_ICMP
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#ifndef CONFIG_ATM_CLIP_NO_ICMP
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icmp_send(skb,ICMP_DEST_UNREACH,ICMP_HOST_UNREACH,0);
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icmp_send(skb,ICMP_DEST_UNREACH,ICMP_HOST_UNREACH,0);
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#endif
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#endif
|
kfree_skb(skb);
|
kfree_skb(skb);
|
}
|
}
|
|
|
|
|
static struct neigh_ops clip_neigh_ops = {
|
static struct neigh_ops clip_neigh_ops = {
|
family: AF_INET,
|
family: AF_INET,
|
destructor: clip_neigh_destroy,
|
destructor: clip_neigh_destroy,
|
solicit: clip_neigh_solicit,
|
solicit: clip_neigh_solicit,
|
error_report: clip_neigh_error,
|
error_report: clip_neigh_error,
|
output: dev_queue_xmit,
|
output: dev_queue_xmit,
|
connected_output: dev_queue_xmit,
|
connected_output: dev_queue_xmit,
|
hh_output: dev_queue_xmit,
|
hh_output: dev_queue_xmit,
|
queue_xmit: dev_queue_xmit,
|
queue_xmit: dev_queue_xmit,
|
};
|
};
|
|
|
|
|
static int clip_constructor(struct neighbour *neigh)
|
static int clip_constructor(struct neighbour *neigh)
|
{
|
{
|
struct atmarp_entry *entry = NEIGH2ENTRY(neigh);
|
struct atmarp_entry *entry = NEIGH2ENTRY(neigh);
|
struct net_device *dev = neigh->dev;
|
struct net_device *dev = neigh->dev;
|
struct in_device *in_dev = dev->ip_ptr;
|
struct in_device *in_dev = dev->ip_ptr;
|
|
|
DPRINTK("clip_constructor (neigh %p, entry %p)\n",neigh,entry);
|
DPRINTK("clip_constructor (neigh %p, entry %p)\n",neigh,entry);
|
if (!in_dev) return -EINVAL;
|
if (!in_dev) return -EINVAL;
|
neigh->type = inet_addr_type(entry->ip);
|
neigh->type = inet_addr_type(entry->ip);
|
if (neigh->type != RTN_UNICAST) return -EINVAL;
|
if (neigh->type != RTN_UNICAST) return -EINVAL;
|
if (in_dev->arp_parms) neigh->parms = in_dev->arp_parms;
|
if (in_dev->arp_parms) neigh->parms = in_dev->arp_parms;
|
neigh->ops = &clip_neigh_ops;
|
neigh->ops = &clip_neigh_ops;
|
neigh->output = neigh->nud_state & NUD_VALID ?
|
neigh->output = neigh->nud_state & NUD_VALID ?
|
neigh->ops->connected_output : neigh->ops->output;
|
neigh->ops->connected_output : neigh->ops->output;
|
entry->neigh = neigh;
|
entry->neigh = neigh;
|
entry->vccs = NULL;
|
entry->vccs = NULL;
|
entry->expires = jiffies-1;
|
entry->expires = jiffies-1;
|
return 0;
|
return 0;
|
}
|
}
|
|
|
static u32 clip_hash(const void *pkey, const struct net_device *dev)
|
static u32 clip_hash(const void *pkey, const struct net_device *dev)
|
{
|
{
|
u32 hash_val;
|
u32 hash_val;
|
|
|
hash_val = *(u32*)pkey;
|
hash_val = *(u32*)pkey;
|
hash_val ^= (hash_val>>16);
|
hash_val ^= (hash_val>>16);
|
hash_val ^= hash_val>>8;
|
hash_val ^= hash_val>>8;
|
hash_val ^= hash_val>>3;
|
hash_val ^= hash_val>>3;
|
hash_val = (hash_val^dev->ifindex)&NEIGH_HASHMASK;
|
hash_val = (hash_val^dev->ifindex)&NEIGH_HASHMASK;
|
|
|
return hash_val;
|
return hash_val;
|
}
|
}
|
|
|
|
|
static struct neigh_table clip_tbl = {
|
static struct neigh_table clip_tbl = {
|
NULL, /* next */
|
NULL, /* next */
|
AF_INET, /* family */
|
AF_INET, /* family */
|
sizeof(struct neighbour)+sizeof(struct atmarp_entry), /* entry_size */
|
sizeof(struct neighbour)+sizeof(struct atmarp_entry), /* entry_size */
|
4, /* key_len */
|
4, /* key_len */
|
clip_hash,
|
clip_hash,
|
clip_constructor, /* constructor */
|
clip_constructor, /* constructor */
|
NULL, /* pconstructor */
|
NULL, /* pconstructor */
|
NULL, /* pdestructor */
|
NULL, /* pdestructor */
|
NULL, /* proxy_redo */
|
NULL, /* proxy_redo */
|
"clip_arp_cache",
|
"clip_arp_cache",
|
{ /* neigh_parms */
|
{ /* neigh_parms */
|
NULL, /* next */
|
NULL, /* next */
|
NULL, /* neigh_setup */
|
NULL, /* neigh_setup */
|
&clip_tbl, /* tbl */
|
&clip_tbl, /* tbl */
|
0, /* entries */
|
0, /* entries */
|
NULL, /* priv */
|
NULL, /* priv */
|
NULL, /* sysctl_table */
|
NULL, /* sysctl_table */
|
30*HZ, /* base_reachable_time */
|
30*HZ, /* base_reachable_time */
|
1*HZ, /* retrans_time */
|
1*HZ, /* retrans_time */
|
60*HZ, /* gc_staletime */
|
60*HZ, /* gc_staletime */
|
30*HZ, /* reachable_time */
|
30*HZ, /* reachable_time */
|
5*HZ, /* delay_probe_time */
|
5*HZ, /* delay_probe_time */
|
3, /* queue_len */
|
3, /* queue_len */
|
3, /* ucast_probes */
|
3, /* ucast_probes */
|
0, /* app_probes */
|
0, /* app_probes */
|
3, /* mcast_probes */
|
3, /* mcast_probes */
|
1*HZ, /* anycast_delay */
|
1*HZ, /* anycast_delay */
|
(8*HZ)/10, /* proxy_delay */
|
(8*HZ)/10, /* proxy_delay */
|
1*HZ, /* proxy_qlen */
|
1*HZ, /* proxy_qlen */
|
64 /* locktime */
|
64 /* locktime */
|
},
|
},
|
30*HZ,128,512,1024 /* copied from ARP ... */
|
30*HZ,128,512,1024 /* copied from ARP ... */
|
};
|
};
|
|
|
|
|
/* @@@ copy bh locking from arp.c -- need to bh-enable atm code before */
|
/* @@@ copy bh locking from arp.c -- need to bh-enable atm code before */
|
|
|
/*
|
/*
|
* We play with the resolve flag: 0 and 1 have the usual meaning, but -1 means
|
* We play with the resolve flag: 0 and 1 have the usual meaning, but -1 means
|
* to allocate the neighbour entry but not to ask atmarpd for resolution. Also,
|
* to allocate the neighbour entry but not to ask atmarpd for resolution. Also,
|
* don't increment the usage count. This is used to create entries in
|
* don't increment the usage count. This is used to create entries in
|
* clip_setentry.
|
* clip_setentry.
|
*/
|
*/
|
|
|
|
|
static int clip_encap(struct atm_vcc *vcc,int mode)
|
static int clip_encap(struct atm_vcc *vcc,int mode)
|
{
|
{
|
CLIP_VCC(vcc)->encap = mode;
|
CLIP_VCC(vcc)->encap = mode;
|
return 0;
|
return 0;
|
}
|
}
|
|
|
|
|
static int clip_start_xmit(struct sk_buff *skb,struct net_device *dev)
|
static int clip_start_xmit(struct sk_buff *skb,struct net_device *dev)
|
{
|
{
|
struct clip_priv *clip_priv = PRIV(dev);
|
struct clip_priv *clip_priv = PRIV(dev);
|
struct atmarp_entry *entry;
|
struct atmarp_entry *entry;
|
struct atm_vcc *vcc;
|
struct atm_vcc *vcc;
|
int old;
|
int old;
|
unsigned long flags;
|
unsigned long flags;
|
|
|
DPRINTK("clip_start_xmit (skb %p)\n",skb);
|
DPRINTK("clip_start_xmit (skb %p)\n",skb);
|
if (!skb->dst) {
|
if (!skb->dst) {
|
printk(KERN_ERR "clip_start_xmit: skb->dst == NULL\n");
|
printk(KERN_ERR "clip_start_xmit: skb->dst == NULL\n");
|
dev_kfree_skb(skb);
|
dev_kfree_skb(skb);
|
clip_priv->stats.tx_dropped++;
|
clip_priv->stats.tx_dropped++;
|
return 0;
|
return 0;
|
}
|
}
|
if (!skb->dst->neighbour) {
|
if (!skb->dst->neighbour) {
|
#if 0
|
#if 0
|
skb->dst->neighbour = clip_find_neighbour(skb->dst,1);
|
skb->dst->neighbour = clip_find_neighbour(skb->dst,1);
|
if (!skb->dst->neighbour) {
|
if (!skb->dst->neighbour) {
|
dev_kfree_skb(skb); /* lost that one */
|
dev_kfree_skb(skb); /* lost that one */
|
clip_priv->stats.tx_dropped++;
|
clip_priv->stats.tx_dropped++;
|
return 0;
|
return 0;
|
}
|
}
|
#endif
|
#endif
|
printk(KERN_ERR "clip_start_xmit: NO NEIGHBOUR !\n");
|
printk(KERN_ERR "clip_start_xmit: NO NEIGHBOUR !\n");
|
dev_kfree_skb(skb);
|
dev_kfree_skb(skb);
|
clip_priv->stats.tx_dropped++;
|
clip_priv->stats.tx_dropped++;
|
return 0;
|
return 0;
|
}
|
}
|
entry = NEIGH2ENTRY(skb->dst->neighbour);
|
entry = NEIGH2ENTRY(skb->dst->neighbour);
|
if (!entry->vccs) {
|
if (!entry->vccs) {
|
if (time_after(jiffies, entry->expires)) {
|
if (time_after(jiffies, entry->expires)) {
|
/* should be resolved */
|
/* should be resolved */
|
entry->expires = jiffies+ATMARP_RETRY_DELAY*HZ;
|
entry->expires = jiffies+ATMARP_RETRY_DELAY*HZ;
|
to_atmarpd(act_need,PRIV(dev)->number,entry->ip);
|
to_atmarpd(act_need,PRIV(dev)->number,entry->ip);
|
}
|
}
|
if (entry->neigh->arp_queue.qlen < ATMARP_MAX_UNRES_PACKETS)
|
if (entry->neigh->arp_queue.qlen < ATMARP_MAX_UNRES_PACKETS)
|
skb_queue_tail(&entry->neigh->arp_queue,skb);
|
skb_queue_tail(&entry->neigh->arp_queue,skb);
|
else {
|
else {
|
dev_kfree_skb(skb);
|
dev_kfree_skb(skb);
|
clip_priv->stats.tx_dropped++;
|
clip_priv->stats.tx_dropped++;
|
}
|
}
|
return 0;
|
return 0;
|
}
|
}
|
DPRINTK("neigh %p, vccs %p\n",entry,entry->vccs);
|
DPRINTK("neigh %p, vccs %p\n",entry,entry->vccs);
|
ATM_SKB(skb)->vcc = vcc = entry->vccs->vcc;
|
ATM_SKB(skb)->vcc = vcc = entry->vccs->vcc;
|
DPRINTK("using neighbour %p, vcc %p\n",skb->dst->neighbour,vcc);
|
DPRINTK("using neighbour %p, vcc %p\n",skb->dst->neighbour,vcc);
|
if (entry->vccs->encap) {
|
if (entry->vccs->encap) {
|
void *here;
|
void *here;
|
|
|
here = skb_push(skb,RFC1483LLC_LEN);
|
here = skb_push(skb,RFC1483LLC_LEN);
|
memcpy(here,llc_oui,sizeof(llc_oui));
|
memcpy(here,llc_oui,sizeof(llc_oui));
|
((u16 *) here)[3] = skb->protocol;
|
((u16 *) here)[3] = skb->protocol;
|
}
|
}
|
atomic_add(skb->truesize,&vcc->sk->wmem_alloc);
|
atomic_add(skb->truesize,&vcc->sk->wmem_alloc);
|
ATM_SKB(skb)->atm_options = vcc->atm_options;
|
ATM_SKB(skb)->atm_options = vcc->atm_options;
|
entry->vccs->last_use = jiffies;
|
entry->vccs->last_use = jiffies;
|
DPRINTK("atm_skb(%p)->vcc(%p)->dev(%p)\n",skb,vcc,vcc->dev);
|
DPRINTK("atm_skb(%p)->vcc(%p)->dev(%p)\n",skb,vcc,vcc->dev);
|
old = xchg(&entry->vccs->xoff,1); /* assume XOFF ... */
|
old = xchg(&entry->vccs->xoff,1); /* assume XOFF ... */
|
if (old) {
|
if (old) {
|
printk(KERN_WARNING "clip_start_xmit: XOFF->XOFF transition\n");
|
printk(KERN_WARNING "clip_start_xmit: XOFF->XOFF transition\n");
|
return 0;
|
return 0;
|
}
|
}
|
clip_priv->stats.tx_packets++;
|
clip_priv->stats.tx_packets++;
|
clip_priv->stats.tx_bytes += skb->len;
|
clip_priv->stats.tx_bytes += skb->len;
|
(void) vcc->send(vcc,skb);
|
(void) vcc->send(vcc,skb);
|
if (atm_may_send(vcc,0)) {
|
if (atm_may_send(vcc,0)) {
|
entry->vccs->xoff = 0;
|
entry->vccs->xoff = 0;
|
return 0;
|
return 0;
|
}
|
}
|
spin_lock_irqsave(&clip_priv->xoff_lock,flags);
|
spin_lock_irqsave(&clip_priv->xoff_lock,flags);
|
netif_stop_queue(dev); /* XOFF -> throttle immediately */
|
netif_stop_queue(dev); /* XOFF -> throttle immediately */
|
barrier();
|
barrier();
|
if (!entry->vccs->xoff)
|
if (!entry->vccs->xoff)
|
netif_start_queue(dev);
|
netif_start_queue(dev);
|
/* Oh, we just raced with clip_pop. netif_start_queue should be
|
/* Oh, we just raced with clip_pop. netif_start_queue should be
|
good enough, because nothing should really be asleep because
|
good enough, because nothing should really be asleep because
|
of the brief netif_stop_queue. If this isn't true or if it
|
of the brief netif_stop_queue. If this isn't true or if it
|
changes, use netif_wake_queue instead. */
|
changes, use netif_wake_queue instead. */
|
spin_unlock_irqrestore(&clip_priv->xoff_lock,flags);
|
spin_unlock_irqrestore(&clip_priv->xoff_lock,flags);
|
return 0;
|
return 0;
|
}
|
}
|
|
|
|
|
static struct net_device_stats *clip_get_stats(struct net_device *dev)
|
static struct net_device_stats *clip_get_stats(struct net_device *dev)
|
{
|
{
|
return &PRIV(dev)->stats;
|
return &PRIV(dev)->stats;
|
}
|
}
|
|
|
|
|
static int clip_mkip(struct atm_vcc *vcc,int timeout)
|
static int clip_mkip(struct atm_vcc *vcc,int timeout)
|
{
|
{
|
struct clip_vcc *clip_vcc;
|
struct clip_vcc *clip_vcc;
|
struct sk_buff_head copy;
|
struct sk_buff_head copy;
|
struct sk_buff *skb;
|
struct sk_buff *skb;
|
|
|
if (!vcc->push) return -EBADFD;
|
if (!vcc->push) return -EBADFD;
|
clip_vcc = kmalloc(sizeof(struct clip_vcc),GFP_KERNEL);
|
clip_vcc = kmalloc(sizeof(struct clip_vcc),GFP_KERNEL);
|
if (!clip_vcc) return -ENOMEM;
|
if (!clip_vcc) return -ENOMEM;
|
DPRINTK("mkip clip_vcc %p vcc %p\n",clip_vcc,vcc);
|
DPRINTK("mkip clip_vcc %p vcc %p\n",clip_vcc,vcc);
|
clip_vcc->vcc = vcc;
|
clip_vcc->vcc = vcc;
|
vcc->user_back = clip_vcc;
|
vcc->user_back = clip_vcc;
|
clip_vcc->entry = NULL;
|
clip_vcc->entry = NULL;
|
clip_vcc->xoff = 0;
|
clip_vcc->xoff = 0;
|
clip_vcc->encap = 1;
|
clip_vcc->encap = 1;
|
clip_vcc->last_use = jiffies;
|
clip_vcc->last_use = jiffies;
|
clip_vcc->idle_timeout = timeout*HZ;
|
clip_vcc->idle_timeout = timeout*HZ;
|
clip_vcc->old_push = vcc->push;
|
clip_vcc->old_push = vcc->push;
|
clip_vcc->old_pop = vcc->pop;
|
clip_vcc->old_pop = vcc->pop;
|
vcc->push = clip_push;
|
vcc->push = clip_push;
|
vcc->pop = clip_pop;
|
vcc->pop = clip_pop;
|
skb_queue_head_init(©);
|
skb_queue_head_init(©);
|
skb_migrate(&vcc->sk->receive_queue,©);
|
skb_migrate(&vcc->sk->receive_queue,©);
|
/* re-process everything received between connection setup and MKIP */
|
/* re-process everything received between connection setup and MKIP */
|
while ((skb = skb_dequeue(©)))
|
while ((skb = skb_dequeue(©)))
|
if (!clip_devs) {
|
if (!clip_devs) {
|
atm_return(vcc,skb->truesize);
|
atm_return(vcc,skb->truesize);
|
kfree_skb(skb);
|
kfree_skb(skb);
|
}
|
}
|
else {
|
else {
|
unsigned int len = skb->len;
|
unsigned int len = skb->len;
|
|
|
clip_push(vcc,skb);
|
clip_push(vcc,skb);
|
PRIV(skb->dev)->stats.rx_packets--;
|
PRIV(skb->dev)->stats.rx_packets--;
|
PRIV(skb->dev)->stats.rx_bytes -= len;
|
PRIV(skb->dev)->stats.rx_bytes -= len;
|
}
|
}
|
return 0;
|
return 0;
|
}
|
}
|
|
|
|
|
static int clip_setentry(struct atm_vcc *vcc,u32 ip)
|
static int clip_setentry(struct atm_vcc *vcc,u32 ip)
|
{
|
{
|
struct neighbour *neigh;
|
struct neighbour *neigh;
|
struct atmarp_entry *entry;
|
struct atmarp_entry *entry;
|
int error;
|
int error;
|
struct clip_vcc *clip_vcc;
|
struct clip_vcc *clip_vcc;
|
struct rtable *rt;
|
struct rtable *rt;
|
|
|
if (vcc->push != clip_push) {
|
if (vcc->push != clip_push) {
|
printk(KERN_WARNING "clip_setentry: non-CLIP VCC\n");
|
printk(KERN_WARNING "clip_setentry: non-CLIP VCC\n");
|
return -EBADF;
|
return -EBADF;
|
}
|
}
|
clip_vcc = CLIP_VCC(vcc);
|
clip_vcc = CLIP_VCC(vcc);
|
if (!ip) {
|
if (!ip) {
|
if (!clip_vcc->entry) {
|
if (!clip_vcc->entry) {
|
printk(KERN_ERR "hiding hidden ATMARP entry\n");
|
printk(KERN_ERR "hiding hidden ATMARP entry\n");
|
return 0;
|
return 0;
|
}
|
}
|
DPRINTK("setentry: remove\n");
|
DPRINTK("setentry: remove\n");
|
unlink_clip_vcc(clip_vcc);
|
unlink_clip_vcc(clip_vcc);
|
return 0;
|
return 0;
|
}
|
}
|
error = ip_route_output(&rt,ip,0,1,0);
|
error = ip_route_output(&rt,ip,0,1,0);
|
if (error) return error;
|
if (error) return error;
|
neigh = __neigh_lookup(&clip_tbl,&ip,rt->u.dst.dev,1);
|
neigh = __neigh_lookup(&clip_tbl,&ip,rt->u.dst.dev,1);
|
ip_rt_put(rt);
|
ip_rt_put(rt);
|
if (!neigh)
|
if (!neigh)
|
return -ENOMEM;
|
return -ENOMEM;
|
entry = NEIGH2ENTRY(neigh);
|
entry = NEIGH2ENTRY(neigh);
|
if (entry != clip_vcc->entry) {
|
if (entry != clip_vcc->entry) {
|
if (!clip_vcc->entry) DPRINTK("setentry: add\n");
|
if (!clip_vcc->entry) DPRINTK("setentry: add\n");
|
else {
|
else {
|
DPRINTK("setentry: update\n");
|
DPRINTK("setentry: update\n");
|
unlink_clip_vcc(clip_vcc);
|
unlink_clip_vcc(clip_vcc);
|
}
|
}
|
link_vcc(clip_vcc,entry);
|
link_vcc(clip_vcc,entry);
|
}
|
}
|
error = neigh_update(neigh,llc_oui,NUD_PERMANENT,1,0);
|
error = neigh_update(neigh,llc_oui,NUD_PERMANENT,1,0);
|
neigh_release(neigh);
|
neigh_release(neigh);
|
return error;
|
return error;
|
}
|
}
|
|
|
|
|
static int clip_init(struct net_device *dev)
|
static int clip_init(struct net_device *dev)
|
{
|
{
|
DPRINTK("clip_init %s\n",dev->name);
|
DPRINTK("clip_init %s\n",dev->name);
|
dev->hard_start_xmit = clip_start_xmit;
|
dev->hard_start_xmit = clip_start_xmit;
|
/* sg_xmit ... */
|
/* sg_xmit ... */
|
dev->hard_header = NULL;
|
dev->hard_header = NULL;
|
dev->rebuild_header = NULL;
|
dev->rebuild_header = NULL;
|
dev->set_mac_address = NULL;
|
dev->set_mac_address = NULL;
|
dev->hard_header_parse = NULL;
|
dev->hard_header_parse = NULL;
|
dev->hard_header_cache = NULL;
|
dev->hard_header_cache = NULL;
|
dev->header_cache_update = NULL;
|
dev->header_cache_update = NULL;
|
dev->change_mtu = NULL;
|
dev->change_mtu = NULL;
|
dev->do_ioctl = NULL;
|
dev->do_ioctl = NULL;
|
dev->get_stats = clip_get_stats;
|
dev->get_stats = clip_get_stats;
|
dev->type = ARPHRD_ATM;
|
dev->type = ARPHRD_ATM;
|
dev->hard_header_len = RFC1483LLC_LEN;
|
dev->hard_header_len = RFC1483LLC_LEN;
|
dev->mtu = RFC1626_MTU;
|
dev->mtu = RFC1626_MTU;
|
dev->addr_len = 0;
|
dev->addr_len = 0;
|
dev->tx_queue_len = 100; /* "normal" queue (packets) */
|
dev->tx_queue_len = 100; /* "normal" queue (packets) */
|
/* When using a "real" qdisc, the qdisc determines the queue */
|
/* When using a "real" qdisc, the qdisc determines the queue */
|
/* length. tx_queue_len is only used for the default case, */
|
/* length. tx_queue_len is only used for the default case, */
|
/* without any more elaborate queuing. 100 is a reasonable */
|
/* without any more elaborate queuing. 100 is a reasonable */
|
/* compromise between decent burst-tolerance and protection */
|
/* compromise between decent burst-tolerance and protection */
|
/* against memory hogs. */
|
/* against memory hogs. */
|
dev->flags = 0;
|
dev->flags = 0;
|
return 0;
|
return 0;
|
}
|
}
|
|
|
|
|
static int clip_create(int number)
|
static int clip_create(int number)
|
{
|
{
|
struct net_device *dev;
|
struct net_device *dev;
|
struct clip_priv *clip_priv;
|
struct clip_priv *clip_priv;
|
int error;
|
int error;
|
|
|
if (number != -1) {
|
if (number != -1) {
|
for (dev = clip_devs; dev; dev = PRIV(dev)->next)
|
for (dev = clip_devs; dev; dev = PRIV(dev)->next)
|
if (PRIV(dev)->number == number) return -EEXIST;
|
if (PRIV(dev)->number == number) return -EEXIST;
|
}
|
}
|
else {
|
else {
|
number = 0;
|
number = 0;
|
for (dev = clip_devs; dev; dev = PRIV(dev)->next)
|
for (dev = clip_devs; dev; dev = PRIV(dev)->next)
|
if (PRIV(dev)->number >= number)
|
if (PRIV(dev)->number >= number)
|
number = PRIV(dev)->number+1;
|
number = PRIV(dev)->number+1;
|
}
|
}
|
dev = kmalloc(sizeof(struct net_device)+sizeof(struct clip_priv),
|
dev = kmalloc(sizeof(struct net_device)+sizeof(struct clip_priv),
|
GFP_KERNEL);
|
GFP_KERNEL);
|
if (!dev) return -ENOMEM;
|
if (!dev) return -ENOMEM;
|
memset(dev,0,sizeof(struct net_device)+sizeof(struct clip_priv));
|
memset(dev,0,sizeof(struct net_device)+sizeof(struct clip_priv));
|
clip_priv = PRIV(dev);
|
clip_priv = PRIV(dev);
|
sprintf(dev->name,"atm%d",number);
|
sprintf(dev->name,"atm%d",number);
|
dev->init = clip_init;
|
dev->init = clip_init;
|
spin_lock_init(&clip_priv->xoff_lock);
|
spin_lock_init(&clip_priv->xoff_lock);
|
clip_priv->number = number;
|
clip_priv->number = number;
|
error = register_netdev(dev);
|
error = register_netdev(dev);
|
if (error) {
|
if (error) {
|
kfree(dev);
|
kfree(dev);
|
return error;
|
return error;
|
}
|
}
|
clip_priv->next = clip_devs;
|
clip_priv->next = clip_devs;
|
clip_devs = dev;
|
clip_devs = dev;
|
DPRINTK("registered (net:%s)\n",dev->name);
|
DPRINTK("registered (net:%s)\n",dev->name);
|
return number;
|
return number;
|
}
|
}
|
|
|
|
|
static int clip_device_event(struct notifier_block *this,unsigned long event,
|
static int clip_device_event(struct notifier_block *this,unsigned long event,
|
void *dev)
|
void *dev)
|
{
|
{
|
/* ignore non-CLIP devices */
|
/* ignore non-CLIP devices */
|
if (((struct net_device *) dev)->type != ARPHRD_ATM ||
|
if (((struct net_device *) dev)->type != ARPHRD_ATM ||
|
((struct net_device *) dev)->init != clip_init)
|
((struct net_device *) dev)->init != clip_init)
|
return NOTIFY_DONE;
|
return NOTIFY_DONE;
|
switch (event) {
|
switch (event) {
|
case NETDEV_UP:
|
case NETDEV_UP:
|
DPRINTK("clip_device_event NETDEV_UP\n");
|
DPRINTK("clip_device_event NETDEV_UP\n");
|
(void) to_atmarpd(act_up,PRIV(dev)->number,0);
|
(void) to_atmarpd(act_up,PRIV(dev)->number,0);
|
break;
|
break;
|
case NETDEV_GOING_DOWN:
|
case NETDEV_GOING_DOWN:
|
DPRINTK("clip_device_event NETDEV_DOWN\n");
|
DPRINTK("clip_device_event NETDEV_DOWN\n");
|
(void) to_atmarpd(act_down,PRIV(dev)->number,0);
|
(void) to_atmarpd(act_down,PRIV(dev)->number,0);
|
break;
|
break;
|
case NETDEV_CHANGE:
|
case NETDEV_CHANGE:
|
case NETDEV_CHANGEMTU:
|
case NETDEV_CHANGEMTU:
|
DPRINTK("clip_device_event NETDEV_CHANGE*\n");
|
DPRINTK("clip_device_event NETDEV_CHANGE*\n");
|
(void) to_atmarpd(act_change,PRIV(dev)->number,0);
|
(void) to_atmarpd(act_change,PRIV(dev)->number,0);
|
break;
|
break;
|
case NETDEV_REBOOT:
|
case NETDEV_REBOOT:
|
case NETDEV_REGISTER:
|
case NETDEV_REGISTER:
|
case NETDEV_DOWN:
|
case NETDEV_DOWN:
|
DPRINTK("clip_device_event %ld\n",event);
|
DPRINTK("clip_device_event %ld\n",event);
|
/* ignore */
|
/* ignore */
|
break;
|
break;
|
default:
|
default:
|
printk(KERN_WARNING "clip_device_event: unknown event "
|
printk(KERN_WARNING "clip_device_event: unknown event "
|
"%ld\n",event);
|
"%ld\n",event);
|
break;
|
break;
|
}
|
}
|
return NOTIFY_DONE;
|
return NOTIFY_DONE;
|
}
|
}
|
|
|
|
|
static int clip_inet_event(struct notifier_block *this,unsigned long event,
|
static int clip_inet_event(struct notifier_block *this,unsigned long event,
|
void *ifa)
|
void *ifa)
|
{
|
{
|
struct in_device *in_dev;
|
struct in_device *in_dev;
|
|
|
in_dev = ((struct in_ifaddr *) ifa)->ifa_dev;
|
in_dev = ((struct in_ifaddr *) ifa)->ifa_dev;
|
if (!in_dev || !in_dev->dev) {
|
if (!in_dev || !in_dev->dev) {
|
printk(KERN_WARNING "clip_inet_event: no device\n");
|
printk(KERN_WARNING "clip_inet_event: no device\n");
|
return NOTIFY_DONE;
|
return NOTIFY_DONE;
|
}
|
}
|
/*
|
/*
|
* Transitions are of the down-change-up type, so it's sufficient to
|
* Transitions are of the down-change-up type, so it's sufficient to
|
* handle the change on up.
|
* handle the change on up.
|
*/
|
*/
|
if (event != NETDEV_UP) return NOTIFY_DONE;
|
if (event != NETDEV_UP) return NOTIFY_DONE;
|
return clip_device_event(this,NETDEV_CHANGE,in_dev->dev);
|
return clip_device_event(this,NETDEV_CHANGE,in_dev->dev);
|
}
|
}
|
|
|
|
|
static struct notifier_block clip_dev_notifier = {
|
static struct notifier_block clip_dev_notifier = {
|
clip_device_event,
|
clip_device_event,
|
NULL,
|
NULL,
|
0
|
0
|
};
|
};
|
|
|
|
|
|
|
static struct notifier_block clip_inet_notifier = {
|
static struct notifier_block clip_inet_notifier = {
|
clip_inet_event,
|
clip_inet_event,
|
NULL,
|
NULL,
|
0
|
0
|
};
|
};
|
|
|
|
|
|
|
static void atmarpd_close(struct atm_vcc *vcc)
|
static void atmarpd_close(struct atm_vcc *vcc)
|
{
|
{
|
DPRINTK("atmarpd_close\n");
|
DPRINTK("atmarpd_close\n");
|
atmarpd = NULL; /* assumed to be atomic */
|
atmarpd = NULL; /* assumed to be atomic */
|
barrier();
|
barrier();
|
unregister_inetaddr_notifier(&clip_inet_notifier);
|
unregister_inetaddr_notifier(&clip_inet_notifier);
|
unregister_netdevice_notifier(&clip_dev_notifier);
|
unregister_netdevice_notifier(&clip_dev_notifier);
|
if (skb_peek(&vcc->sk->receive_queue))
|
if (skb_peek(&vcc->sk->receive_queue))
|
printk(KERN_ERR "atmarpd_close: closing with requests "
|
printk(KERN_ERR "atmarpd_close: closing with requests "
|
"pending\n");
|
"pending\n");
|
skb_queue_purge(&vcc->sk->receive_queue);
|
skb_queue_purge(&vcc->sk->receive_queue);
|
DPRINTK("(done)\n");
|
DPRINTK("(done)\n");
|
MOD_DEC_USE_COUNT;
|
MOD_DEC_USE_COUNT;
|
}
|
}
|
|
|
|
|
static struct atmdev_ops atmarpd_dev_ops = {
|
static struct atmdev_ops atmarpd_dev_ops = {
|
.close = atmarpd_close,
|
.close = atmarpd_close,
|
};
|
};
|
|
|
|
|
static struct atm_dev atmarpd_dev = {
|
static struct atm_dev atmarpd_dev = {
|
.ops = &atmarpd_dev_ops,
|
.ops = &atmarpd_dev_ops,
|
.type = "arpd",
|
.type = "arpd",
|
.number = 999,
|
.number = 999,
|
.lock = SPIN_LOCK_UNLOCKED
|
.lock = SPIN_LOCK_UNLOCKED
|
};
|
};
|
|
|
|
|
static int atm_init_atmarp(struct atm_vcc *vcc)
|
static int atm_init_atmarp(struct atm_vcc *vcc)
|
{
|
{
|
struct net_device *dev;
|
struct net_device *dev;
|
|
|
if (atmarpd) return -EADDRINUSE;
|
if (atmarpd) return -EADDRINUSE;
|
if (start_timer) {
|
if (start_timer) {
|
start_timer = 0;
|
start_timer = 0;
|
init_timer(&idle_timer);
|
init_timer(&idle_timer);
|
idle_timer.expires = jiffies+CLIP_CHECK_INTERVAL*HZ;
|
idle_timer.expires = jiffies+CLIP_CHECK_INTERVAL*HZ;
|
idle_timer.function = idle_timer_check;
|
idle_timer.function = idle_timer_check;
|
add_timer(&idle_timer);
|
add_timer(&idle_timer);
|
}
|
}
|
atmarpd = vcc;
|
atmarpd = vcc;
|
set_bit(ATM_VF_META,&vcc->flags);
|
set_bit(ATM_VF_META,&vcc->flags);
|
set_bit(ATM_VF_READY,&vcc->flags);
|
set_bit(ATM_VF_READY,&vcc->flags);
|
/* allow replies and avoid getting closed if signaling dies */
|
/* allow replies and avoid getting closed if signaling dies */
|
vcc->dev = &atmarpd_dev;
|
vcc->dev = &atmarpd_dev;
|
vcc_insert_socket(vcc->sk);
|
vcc_insert_socket(vcc->sk);
|
vcc->push = NULL;
|
vcc->push = NULL;
|
vcc->pop = NULL; /* crash */
|
vcc->pop = NULL; /* crash */
|
vcc->push_oam = NULL; /* crash */
|
vcc->push_oam = NULL; /* crash */
|
if (register_netdevice_notifier(&clip_dev_notifier))
|
if (register_netdevice_notifier(&clip_dev_notifier))
|
printk(KERN_ERR "register_netdevice_notifier failed\n");
|
printk(KERN_ERR "register_netdevice_notifier failed\n");
|
if (register_inetaddr_notifier(&clip_inet_notifier))
|
if (register_inetaddr_notifier(&clip_inet_notifier))
|
printk(KERN_ERR "register_inetaddr_notifier failed\n");
|
printk(KERN_ERR "register_inetaddr_notifier failed\n");
|
for (dev = clip_devs; dev; dev = PRIV(dev)->next)
|
for (dev = clip_devs; dev; dev = PRIV(dev)->next)
|
if (dev->flags & IFF_UP)
|
if (dev->flags & IFF_UP)
|
(void) to_atmarpd(act_up,PRIV(dev)->number,0);
|
(void) to_atmarpd(act_up,PRIV(dev)->number,0);
|
MOD_INC_USE_COUNT;
|
MOD_INC_USE_COUNT;
|
return 0;
|
return 0;
|
}
|
}
|
|
|
static struct atm_clip_ops __atm_clip_ops = {
|
static struct atm_clip_ops __atm_clip_ops = {
|
.clip_create = clip_create,
|
.clip_create = clip_create,
|
.clip_mkip = clip_mkip,
|
.clip_mkip = clip_mkip,
|
.clip_setentry = clip_setentry,
|
.clip_setentry = clip_setentry,
|
.clip_encap = clip_encap,
|
.clip_encap = clip_encap,
|
.clip_push = clip_push,
|
.clip_push = clip_push,
|
.atm_init_atmarp = atm_init_atmarp,
|
.atm_init_atmarp = atm_init_atmarp,
|
.owner = THIS_MODULE
|
.owner = THIS_MODULE
|
};
|
};
|
|
|
static int __init atm_clip_init(void)
|
static int __init atm_clip_init(void)
|
{
|
{
|
/* we should use neigh_table_init() */
|
/* we should use neigh_table_init() */
|
clip_tbl.lock = RW_LOCK_UNLOCKED;
|
clip_tbl.lock = RW_LOCK_UNLOCKED;
|
clip_tbl.kmem_cachep = kmem_cache_create(clip_tbl.id,
|
clip_tbl.kmem_cachep = kmem_cache_create(clip_tbl.id,
|
clip_tbl.entry_size, 0, SLAB_HWCACHE_ALIGN, NULL, NULL);
|
clip_tbl.entry_size, 0, SLAB_HWCACHE_ALIGN, NULL, NULL);
|
|
|
if (!clip_tbl.kmem_cachep)
|
if (!clip_tbl.kmem_cachep)
|
return -ENOMEM;
|
return -ENOMEM;
|
|
|
/* so neigh_ifdown() doesn't complain */
|
/* so neigh_ifdown() doesn't complain */
|
clip_tbl.proxy_timer.data = 0;
|
clip_tbl.proxy_timer.data = 0;
|
clip_tbl.proxy_timer.function = 0;
|
clip_tbl.proxy_timer.function = 0;
|
init_timer(&clip_tbl.proxy_timer);
|
init_timer(&clip_tbl.proxy_timer);
|
skb_queue_head_init(&clip_tbl.proxy_queue);
|
skb_queue_head_init(&clip_tbl.proxy_queue);
|
|
|
clip_tbl_hook = &clip_tbl;
|
clip_tbl_hook = &clip_tbl;
|
atm_clip_ops_set(&__atm_clip_ops);
|
atm_clip_ops_set(&__atm_clip_ops);
|
|
|
return 0;
|
return 0;
|
}
|
}
|
|
|
static void __exit atm_clip_exit(void)
|
static void __exit atm_clip_exit(void)
|
{
|
{
|
struct net_device *dev, *next;
|
struct net_device *dev, *next;
|
|
|
atm_clip_ops_set(NULL);
|
atm_clip_ops_set(NULL);
|
|
|
neigh_ifdown(&clip_tbl, NULL);
|
neigh_ifdown(&clip_tbl, NULL);
|
dev = clip_devs;
|
dev = clip_devs;
|
while (dev) {
|
while (dev) {
|
next = PRIV(dev)->next;
|
next = PRIV(dev)->next;
|
unregister_netdev(dev);
|
unregister_netdev(dev);
|
kfree(dev);
|
kfree(dev);
|
dev = next;
|
dev = next;
|
}
|
}
|
if (start_timer == 0) del_timer(&idle_timer);
|
if (start_timer == 0) del_timer(&idle_timer);
|
|
|
kmem_cache_destroy(clip_tbl.kmem_cachep);
|
kmem_cache_destroy(clip_tbl.kmem_cachep);
|
|
|
clip_tbl_hook = NULL;
|
clip_tbl_hook = NULL;
|
}
|
}
|
|
|
module_init(atm_clip_init);
|
module_init(atm_clip_init);
|
module_exit(atm_clip_exit);
|
module_exit(atm_clip_exit);
|
|
|
MODULE_LICENSE("GPL");
|
MODULE_LICENSE("GPL");
|
|
|
