forked from luck/tmp_suning_uos_patched
d626f62b11
To clearly state the intent of copying from linear sk_buffs, _offset being a overly long variant but interesting for the sake of saving some bytes. Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
77 lines
1.7 KiB
C
77 lines
1.7 KiB
C
/*
|
|
* This program 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.
|
|
*
|
|
* Copyright Tomi Manninen OH2BNS (oh2bns@sral.fi)
|
|
*/
|
|
#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 void nr_loopback_timer(unsigned long);
|
|
|
|
static struct sk_buff_head loopback_queue;
|
|
static DEFINE_TIMER(loopback_timer, nr_loopback_timer, 0, 0);
|
|
|
|
void __init nr_loopback_init(void)
|
|
{
|
|
skb_queue_head_init(&loopback_queue);
|
|
}
|
|
|
|
static inline 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) {
|
|
skb_copy_from_linear_data(skb, skb_put(skbn, skb->len), skb->len);
|
|
skb_reset_transport_header(skbn);
|
|
|
|
skb_queue_tail(&loopback_queue, skbn);
|
|
|
|
if (!nr_loopback_running())
|
|
mod_timer(&loopback_timer, jiffies + 10);
|
|
}
|
|
|
|
kfree_skb(skb);
|
|
return 1;
|
|
}
|
|
|
|
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 (dev != NULL)
|
|
dev_put(dev);
|
|
|
|
if (!skb_queue_empty(&loopback_queue) && !nr_loopback_running())
|
|
mod_timer(&loopback_timer, jiffies + 10);
|
|
}
|
|
}
|
|
|
|
void __exit nr_loopback_clear(void)
|
|
{
|
|
del_timer_sync(&loopback_timer);
|
|
skb_queue_purge(&loopback_queue);
|
|
}
|