/* * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation; either version 2 of the License, or * (at your option) any later version. * * Copyright Tomi Manninen OH2BNS (oh2bns@sral.fi) */ #include <linux/types.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 struct sk_buff_head loopback_queue; static struct timer_list loopback_timer; static void nr_set_loopback_timer(void); void nr_loopback_init(void) { skb_queue_head_init(&loopback_queue); init_timer(&loopback_timer); } static 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) { memcpy(skb_put(skbn, skb->len), skb->data, skb->len); skbn->h.raw = skbn->data; skb_queue_tail(&loopback_queue, skbn); if (!nr_loopback_running()) nr_set_loopback_timer(); } kfree_skb(skb); return 1; } static void nr_loopback_timer(unsigned long); static void nr_set_loopback_timer(void) { del_timer(&loopback_timer); loopback_timer.data = 0; loopback_timer.function = &nr_loopback_timer; loopback_timer.expires = jiffies + 10; add_timer(&loopback_timer); } static void nr_loopback_timer(unsigned long param) { 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 (!skb_queue_empty(&loopback_queue) && !nr_loopback_running()) nr_set_loopback_timer(); } } void __exit nr_loopback_clear(void) { del_timer(&loopback_timer); skb_queue_purge(&loopback_queue); }