1// SPDX-License-Identifier: GPL-2.0-or-later
 2/*
 3 *
 4 * Copyright Tomi Manninen OH2BNS (oh2bns@sral.fi)
 5 */
 6#include <linux/types.h>
 7#include <linux/slab.h>
 8#include <linux/socket.h>
 9#include <linux/timer.h>
10#include <net/ax25.h>
11#include <linux/skbuff.h>
12#include <net/netrom.h>
13#include <linux/init.h>
14
15static void nr_loopback_timer(struct timer_list *);
16
17static struct sk_buff_head loopback_queue;
18static DEFINE_TIMER(loopback_timer, nr_loopback_timer);
19
20void __init nr_loopback_init(void)
21{
22	skb_queue_head_init(&loopback_queue);
23}
24
25static inline int nr_loopback_running(void)
26{
27	return timer_pending(&loopback_timer);
28}
29
30int nr_loopback_queue(struct sk_buff *skb)
31{
32	struct sk_buff *skbn;
33
34	if ((skbn = alloc_skb(skb->len, GFP_ATOMIC)) != NULL) {
35		skb_copy_from_linear_data(skb, skb_put(skbn, skb->len), skb->len);
36		skb_reset_transport_header(skbn);
37
38		skb_queue_tail(&loopback_queue, skbn);
39
40		if (!nr_loopback_running())
41			mod_timer(&loopback_timer, jiffies + 10);
42	}
43
44	kfree_skb(skb);
45	return 1;
46}
47
48static void nr_loopback_timer(struct timer_list *unused)
49{
50	struct sk_buff *skb;
51	ax25_address *nr_dest;
52	struct net_device *dev;
53
54	if ((skb = skb_dequeue(&loopback_queue)) != NULL) {
55		nr_dest = (ax25_address *)(skb->data + 7);
56
57		dev = nr_dev_get(nr_dest);
58
59		if (dev == NULL || nr_rx_frame(skb, dev) == 0)
60			kfree_skb(skb);
61
62		if (dev != NULL)
63			dev_put(dev);
64
65		if (!skb_queue_empty(&loopback_queue) && !nr_loopback_running())
66			mod_timer(&loopback_timer, jiffies + 10);
67	}
68}
69
70void nr_loopback_clear(void)
71{
72	del_timer_sync(&loopback_timer);
73	skb_queue_purge(&loopback_queue);
74}

 1// SPDX-License-Identifier: GPL-2.0-or-later
 2/*
 3 *
 4 * Copyright Tomi Manninen OH2BNS (oh2bns@sral.fi)
 5 */
 6#include <linux/types.h>
 7#include <linux/slab.h>
 8#include <linux/socket.h>
 9#include <linux/timer.h>
10#include <net/ax25.h>
11#include <linux/skbuff.h>
12#include <net/netrom.h>
13#include <linux/init.h>
14
15static void nr_loopback_timer(struct timer_list *);
16
17static struct sk_buff_head loopback_queue;
18static DEFINE_TIMER(loopback_timer, nr_loopback_timer);
19
20void __init nr_loopback_init(void)
21{
22	skb_queue_head_init(&loopback_queue);
23}
24
25static inline int nr_loopback_running(void)
26{
27	return timer_pending(&loopback_timer);
28}
29
30int nr_loopback_queue(struct sk_buff *skb)
31{
32	struct sk_buff *skbn;
33
34	if ((skbn = alloc_skb(skb->len, GFP_ATOMIC)) != NULL) {
35		skb_copy_from_linear_data(skb, skb_put(skbn, skb->len), skb->len);
36		skb_reset_transport_header(skbn);
37
38		skb_queue_tail(&loopback_queue, skbn);
39
40		if (!nr_loopback_running())
41			mod_timer(&loopback_timer, jiffies + 10);
42	}
43
44	kfree_skb(skb);
45	return 1;
46}
47
48static void nr_loopback_timer(struct timer_list *unused)
49{
50	struct sk_buff *skb;
51	ax25_address *nr_dest;
52	struct net_device *dev;
53
54	if ((skb = skb_dequeue(&loopback_queue)) != NULL) {
55		nr_dest = (ax25_address *)(skb->data + 7);
56
57		dev = nr_dev_get(nr_dest);
58
59		if (dev == NULL || nr_rx_frame(skb, dev) == 0)
60			kfree_skb(skb);
61
62		dev_put(dev);
 
63
64		if (!skb_queue_empty(&loopback_queue) && !nr_loopback_running())
65			mod_timer(&loopback_timer, jiffies + 10);
66	}
67}
68
69void nr_loopback_clear(void)
70{
71	del_timer_sync(&loopback_timer);
72	skb_queue_purge(&loopback_queue);
73}