blob: a880dd33e901c5291b762eee6d0b499c1145e216 (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
|
// SPDX-License-Identifier: GPL-2.0-or-later
/*
*
* Copyright Tomi Manninen OH2BNS (oh2bns@sral.fi)
*/
#include <linux/types.h>
#include <linux/slab.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(struct timer_list *);
static struct sk_buff_head loopback_queue;
static DEFINE_TIMER(loopback_timer, nr_loopback_timer);
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(struct timer_list *unused)
{
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 nr_loopback_clear(void)
{
del_timer_sync(&loopback_timer);
skb_queue_purge(&loopback_queue);
}
|
