Viewing file:  nr_loopback.c (2.08 KB) -rw-r--r--
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/*
* NET/ROM release 007
*
* This code REQUIRES 2.1.15 or higher/ NET3.038
*
* This module:
* This module is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version
* 2 of the License, or (at your option) any later version.
*
* History
* NET/ROM 007 Tomi(OH2BNS) Created this file.
* Small change in nr_loopback_queue().
*
*/
#include <linux/types.h>
#include <linux/socket.h>
#include <linux/timer.h>
#include <net/ax25.h>
#include <linux/skbuff.h>
#include <net/netrom.h>
#include <linux/init.h>
static struct sk_buff_head loopback_queue;
static struct timer_list loopback_timer;
static void nr_set_loopback_timer(void);
void nr_loopback_init(void)
{
skb_queue_head_init(&loopback_queue);
init_timer(&loopback_timer);
}
static int nr_loopback_running(void)
{
return timer_pending(&loopback_timer);
}
int nr_loopback_queue(struct sk_buff *skb)
{
struct sk_buff *skbn;
if ((skbn = alloc_skb(skb->len, GFP_ATOMIC)) != NULL) {
memcpy(skb_put(skbn, skb->len), skb->data, skb->len);
skbn->h.raw = skbn->data;
skb_queue_tail(&loopback_queue, skbn);
if (!nr_loopback_running())
nr_set_loopback_timer();
}
kfree_skb(skb);
return 1;
}
static void nr_loopback_timer(unsigned long);
static void nr_set_loopback_timer(void)
{
del_timer(&loopback_timer);
loopback_timer.data = 0;
loopback_timer.function = &nr_loopback_timer;
loopback_timer.expires = jiffies + 10;
add_timer(&loopback_timer);
}
static void nr_loopback_timer(unsigned long param)
{
struct sk_buff *skb;
ax25_address *nr_dest;
struct net_device *dev;
if ((skb = skb_dequeue(&loopback_queue)) != NULL) {
nr_dest = (ax25_address *)(skb->data + 7);
dev = nr_dev_get(nr_dest);
if (dev == NULL || nr_rx_frame(skb, dev) == 0)
kfree_skb(skb);
if (!skb_queue_empty(&loopback_queue) && !nr_loopback_running())
nr_set_loopback_timer();
}
}
void __exit nr_loopback_clear(void)
{
del_timer(&loopback_timer);
skb_queue_purge(&loopback_queue);
}
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