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https://github.com/edk2-porting/linux-next.git
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d626f62b11
To clearly state the intent of copying from linear sk_buffs, _offset being a overly long variant but interesting for the sake of saving some bytes. Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
77 lines
1.7 KiB
C
77 lines
1.7 KiB
C
/*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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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/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(unsigned long);
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static struct sk_buff_head loopback_queue;
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static DEFINE_TIMER(loopback_timer, nr_loopback_timer, 0, 0);
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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(unsigned long param)
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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 __exit 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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