1 files changed, 76 insertions, 0 deletions

diff --git a/net/netrom/nr_loopback.c b/net/netrom/nr_loopback.c
new file mode 100644
index 000000000000..165b2abce110
--- /dev/null
+++ b/net/netrom/nr_loopback.c
@@ -0,0 +1,76 @@
+/*
+ * 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 void nr_loopback_timer(unsigned long);
+
+static struct sk_buff_head loopback_queue;
+static struct timer_list loopback_timer = TIMER_INITIALIZER(nr_loopback_timer, 0, 0);
+
+void __init nr_loopback_init(void)
+{
+        skb_queue_head_init(&loopback_queue);
+}
+
+static inline 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())
+                        mod_timer(&loopback_timer, jiffies + 10);
+        }
+
+        kfree_skb(skb);
+        return 1;
+}
+
+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 (dev != NULL)
+                        dev_put(dev);
+
+                if (!skb_queue_empty(&loopback_queue) && !nr_loopback_running())
+                        mod_timer(&loopback_timer, jiffies + 10);
+        }
+}
+
+void __exit nr_loopback_clear(void)
+{
+        del_timer_sync(&loopback_timer);
+        skb_queue_purge(&loopback_queue);
+}