Merge master.kernel.org:/pub/scm/linux/kernel/git/davem/sparc-2.6
[linux/fpc-iii.git] / net / netrom / nr_loopback.c
blobe856ae1b360a1e805097f9b409a19b3fb34dd3ca
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.
7 * Copyright Tomi Manninen OH2BNS (oh2bns@sral.fi)
8 */
9 #include <linux/types.h>
10 #include <linux/socket.h>
11 #include <linux/timer.h>
12 #include <net/ax25.h>
13 #include <linux/skbuff.h>
14 #include <net/netrom.h>
15 #include <linux/init.h>
17 static void nr_loopback_timer(unsigned long);
19 static struct sk_buff_head loopback_queue;
20 static DEFINE_TIMER(loopback_timer, nr_loopback_timer, 0, 0);
22 void __init nr_loopback_init(void)
24 skb_queue_head_init(&loopback_queue);
27 static inline int nr_loopback_running(void)
29 return timer_pending(&loopback_timer);
32 int nr_loopback_queue(struct sk_buff *skb)
34 struct sk_buff *skbn;
36 if ((skbn = alloc_skb(skb->len, GFP_ATOMIC)) != NULL) {
37 memcpy(skb_put(skbn, skb->len), skb->data, skb->len);
38 skbn->h.raw = skbn->data;
40 skb_queue_tail(&loopback_queue, skbn);
42 if (!nr_loopback_running())
43 mod_timer(&loopback_timer, jiffies + 10);
46 kfree_skb(skb);
47 return 1;
50 static void nr_loopback_timer(unsigned long param)
52 struct sk_buff *skb;
53 ax25_address *nr_dest;
54 struct net_device *dev;
56 if ((skb = skb_dequeue(&loopback_queue)) != NULL) {
57 nr_dest = (ax25_address *)(skb->data + 7);
59 dev = nr_dev_get(nr_dest);
61 if (dev == NULL || nr_rx_frame(skb, dev) == 0)
62 kfree_skb(skb);
64 if (dev != NULL)
65 dev_put(dev);
67 if (!skb_queue_empty(&loopback_queue) && !nr_loopback_running())
68 mod_timer(&loopback_timer, jiffies + 10);
72 void __exit nr_loopback_clear(void)
74 del_timer_sync(&loopback_timer);
75 skb_queue_purge(&loopback_queue);