2874c5fd28
Based on 1 normalized pattern(s): 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 extracted by the scancode license scanner the SPDX license identifier GPL-2.0-or-later has been chosen to replace the boilerplate/reference in 3029 file(s). Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Reviewed-by: Allison Randal <allison@lohutok.net> Cc: linux-spdx@vger.kernel.org Link: https://lkml.kernel.org/r/20190527070032.746973796@linutronix.de Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
75 lines
1.6 KiB
C
75 lines
1.6 KiB
C
// SPDX-License-Identifier: GPL-2.0-or-later
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/*
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*
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* Copyright Tomi Manninen OH2BNS (oh2bns@sral.fi)
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*/
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#include <linux/types.h>
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#include <linux/slab.h>
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#include <linux/socket.h>
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#include <linux/timer.h>
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#include <net/ax25.h>
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#include <linux/skbuff.h>
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#include <net/netrom.h>
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#include <linux/init.h>
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static void nr_loopback_timer(struct timer_list *);
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static struct sk_buff_head loopback_queue;
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static DEFINE_TIMER(loopback_timer, nr_loopback_timer);
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void __init nr_loopback_init(void)
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{
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skb_queue_head_init(&loopback_queue);
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}
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static inline int nr_loopback_running(void)
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{
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return timer_pending(&loopback_timer);
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}
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int nr_loopback_queue(struct sk_buff *skb)
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{
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struct sk_buff *skbn;
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if ((skbn = alloc_skb(skb->len, GFP_ATOMIC)) != NULL) {
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skb_copy_from_linear_data(skb, skb_put(skbn, skb->len), skb->len);
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skb_reset_transport_header(skbn);
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skb_queue_tail(&loopback_queue, skbn);
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if (!nr_loopback_running())
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mod_timer(&loopback_timer, jiffies + 10);
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}
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kfree_skb(skb);
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return 1;
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}
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static void nr_loopback_timer(struct timer_list *unused)
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{
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struct sk_buff *skb;
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ax25_address *nr_dest;
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struct net_device *dev;
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if ((skb = skb_dequeue(&loopback_queue)) != NULL) {
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nr_dest = (ax25_address *)(skb->data + 7);
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dev = nr_dev_get(nr_dest);
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if (dev == NULL || nr_rx_frame(skb, dev) == 0)
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kfree_skb(skb);
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if (dev != NULL)
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dev_put(dev);
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if (!skb_queue_empty(&loopback_queue) && !nr_loopback_running())
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mod_timer(&loopback_timer, jiffies + 10);
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}
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}
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void nr_loopback_clear(void)
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{
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del_timer_sync(&loopback_timer);
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skb_queue_purge(&loopback_queue);
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}
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