1 // SPDX-License-Identifier: GPL-2.0-or-later <<
2 /* 1 /*
>> 2 * This program is free software; you can redistribute it and/or modify
>> 3 * it under the terms of the GNU General Public License as published by
>> 4 * the Free Software Foundation; either version 2 of the License, or
>> 5 * (at your option) any later version.
3 * 6 *
4 * Copyright Tomi Manninen OH2BNS (oh2bns@sral 7 * Copyright Tomi Manninen OH2BNS (oh2bns@sral.fi)
5 */ 8 */
6 #include <linux/types.h> 9 #include <linux/types.h>
7 #include <linux/slab.h> 10 #include <linux/slab.h>
8 #include <linux/socket.h> 11 #include <linux/socket.h>
9 #include <linux/timer.h> 12 #include <linux/timer.h>
10 #include <net/ax25.h> 13 #include <net/ax25.h>
11 #include <linux/skbuff.h> 14 #include <linux/skbuff.h>
12 #include <net/netrom.h> 15 #include <net/netrom.h>
13 #include <linux/init.h> 16 #include <linux/init.h>
14 17
15 static void nr_loopback_timer(struct timer_lis 18 static void nr_loopback_timer(struct timer_list *);
16 19
17 static struct sk_buff_head loopback_queue; 20 static struct sk_buff_head loopback_queue;
18 static DEFINE_TIMER(loopback_timer, nr_loopbac 21 static DEFINE_TIMER(loopback_timer, nr_loopback_timer);
19 22
20 void __init nr_loopback_init(void) 23 void __init nr_loopback_init(void)
21 { 24 {
22 skb_queue_head_init(&loopback_queue); 25 skb_queue_head_init(&loopback_queue);
23 } 26 }
24 27
25 static inline int nr_loopback_running(void) 28 static inline int nr_loopback_running(void)
26 { 29 {
27 return timer_pending(&loopback_timer); 30 return timer_pending(&loopback_timer);
28 } 31 }
29 32
30 int nr_loopback_queue(struct sk_buff *skb) 33 int nr_loopback_queue(struct sk_buff *skb)
31 { 34 {
32 struct sk_buff *skbn; 35 struct sk_buff *skbn;
33 36
34 if ((skbn = alloc_skb(skb->len, GFP_AT 37 if ((skbn = alloc_skb(skb->len, GFP_ATOMIC)) != NULL) {
35 skb_copy_from_linear_data(skb, 38 skb_copy_from_linear_data(skb, skb_put(skbn, skb->len), skb->len);
36 skb_reset_transport_header(skb 39 skb_reset_transport_header(skbn);
37 40
38 skb_queue_tail(&loopback_queue 41 skb_queue_tail(&loopback_queue, skbn);
39 42
40 if (!nr_loopback_running()) 43 if (!nr_loopback_running())
41 mod_timer(&loopback_ti 44 mod_timer(&loopback_timer, jiffies + 10);
42 } 45 }
43 46
44 kfree_skb(skb); 47 kfree_skb(skb);
45 return 1; 48 return 1;
46 } 49 }
47 50
48 static void nr_loopback_timer(struct timer_lis 51 static void nr_loopback_timer(struct timer_list *unused)
49 { 52 {
50 struct sk_buff *skb; 53 struct sk_buff *skb;
51 ax25_address *nr_dest; 54 ax25_address *nr_dest;
52 struct net_device *dev; 55 struct net_device *dev;
53 56
54 if ((skb = skb_dequeue(&loopback_queue 57 if ((skb = skb_dequeue(&loopback_queue)) != NULL) {
55 nr_dest = (ax25_address *)(skb 58 nr_dest = (ax25_address *)(skb->data + 7);
56 59
57 dev = nr_dev_get(nr_dest); 60 dev = nr_dev_get(nr_dest);
58 61
59 if (dev == NULL || nr_rx_frame 62 if (dev == NULL || nr_rx_frame(skb, dev) == 0)
60 kfree_skb(skb); 63 kfree_skb(skb);
61 64
62 dev_put(dev); !! 65 if (dev != NULL)
>> 66 dev_put(dev);
63 67
64 if (!skb_queue_empty(&loopback 68 if (!skb_queue_empty(&loopback_queue) && !nr_loopback_running())
65 mod_timer(&loopback_ti 69 mod_timer(&loopback_timer, jiffies + 10);
66 } 70 }
67 } 71 }
68 72
69 void nr_loopback_clear(void) !! 73 void __exit nr_loopback_clear(void)
70 { 74 {
71 del_timer_sync(&loopback_timer); 75 del_timer_sync(&loopback_timer);
72 skb_queue_purge(&loopback_queue); 76 skb_queue_purge(&loopback_queue);
73 } 77 }
74 78
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