projects / linux-2.6 / blame
| Commit | Line | Data |
|---|---|---|
| 1da177e4 LT |
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. | |
| 6 | * | |
| 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> | |
| 16 | ||
| 17 | static void nr_loopback_timer(unsigned long); | |
| 18 | ||
| 19 | static struct sk_buff_head loopback_queue; | |
| 20 | static struct timer_list loopback_timer = TIMER_INITIALIZER(nr_loopback_timer, 0, 0); | |
| 21 | ||
| 22 | void __init nr_loopback_init(void) | |
| 23 | { | |
| 24 | skb_queue_head_init(&loopback_queue); | |
| 25 | } | |
| 26 | ||
| 27 | static inline int nr_loopback_running(void) | |
| 28 | { | |
| 29 | return timer_pending(&loopback_timer); | |
| 30 | } | |
| 31 | ||
| 32 | int nr_loopback_queue(struct sk_buff *skb) | |
| 33 | { | |
| 34 | struct sk_buff *skbn; | |
| 35 | ||
| 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; | |
| 39 | ||
| 40 | skb_queue_tail(&loopback_queue, skbn); | |
| 41 | ||
| 42 | if (!nr_loopback_running()) | |
| 43 | mod_timer(&loopback_timer, jiffies + 10); | |
| 44 | } | |
| 45 | ||
| 46 | kfree_skb(skb); | |
| 47 | return 1; | |
| 48 | } | |
| 49 | ||
| 50 | static void nr_loopback_timer(unsigned long param) | |
| 51 | { | |
| 52 | struct sk_buff *skb; | |
| 53 | ax25_address *nr_dest; | |
| 54 | struct net_device *dev; | |
| 55 | ||
| 56 | if ((skb = skb_dequeue(&loopback_queue)) != NULL) { | |
| 57 | nr_dest = (ax25_address *)(skb->data + 7); | |
| 58 | ||
| 59 | dev = nr_dev_get(nr_dest); | |
| 60 | ||
| 61 | if (dev == NULL || nr_rx_frame(skb, dev) == 0) | |
| 62 | kfree_skb(skb); | |
| 63 | ||
| 64 | if (dev != NULL) | |
| 65 | dev_put(dev); | |
| 66 | ||
| 67 | if (!skb_queue_empty(&loopback_queue) && !nr_loopback_running()) | |
| 68 | mod_timer(&loopback_timer, jiffies + 10); | |
| 69 | } | |
| 70 | } | |
| 71 | ||
| 72 | void __exit nr_loopback_clear(void) | |
| 73 | { | |
| 74 | del_timer_sync(&loopback_timer); | |
| 75 | skb_queue_purge(&loopback_queue); | |
| 76 | } |