1 files changed, 111 insertions, 0 deletions

diff --git a/net/rose/rose_loopback.c b/net/rose/rose_loopback.c
new file mode 100644
index 000000000000..103b4d38f88a
--- /dev/null
+++ b/net/rose/rose_loopback.c
@@ -0,0 +1,111 @@
+/*
+ * 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 (C) Jonathan Naylor G4KLX (g4klx@g4klx.demon.co.uk)
+ */
+#include <linux/types.h>
+#include <linux/socket.h>
+#include <linux/timer.h>
+#include <net/ax25.h>
+#include <linux/skbuff.h>
+#include <net/rose.h>
+#include <linux/init.h>
+
+static struct sk_buff_head loopback_queue;
+static struct timer_list loopback_timer;
+
+static void rose_set_loopback_timer(void);
+
+void rose_loopback_init(void)
+{
+        skb_queue_head_init(&loopback_queue);
+
+        init_timer(&loopback_timer);
+}
+
+static int rose_loopback_running(void)
+{
+        return timer_pending(&loopback_timer);
+}
+
+int rose_loopback_queue(struct sk_buff *skb, struct rose_neigh *neigh)
+{
+        struct sk_buff *skbn;
+
+        skbn = skb_clone(skb, GFP_ATOMIC);
+
+        kfree_skb(skb);
+
+        if (skbn != NULL) {
+                skb_queue_tail(&loopback_queue, skbn);
+
+                if (!rose_loopback_running())
+                        rose_set_loopback_timer();
+        }
+
+        return 1;
+}
+
+static void rose_loopback_timer(unsigned long);
+
+static void rose_set_loopback_timer(void)
+{
+        del_timer(&loopback_timer);
+
+        loopback_timer.data     = 0;
+        loopback_timer.function = &rose_loopback_timer;
+        loopback_timer.expires  = jiffies + 10;
+
+        add_timer(&loopback_timer);
+}
+
+static void rose_loopback_timer(unsigned long param)
+{
+        struct sk_buff *skb;
+        struct net_device *dev;
+        rose_address *dest;
+        struct sock *sk;
+        unsigned short frametype;
+        unsigned int lci_i, lci_o;
+
+        while ((skb = skb_dequeue(&loopback_queue)) != NULL) {
+                lci_i     = ((skb->data[0] << 8) & 0xF00) + ((skb->data[1] << 0) & 0x0FF);
+                frametype = skb->data[2];
+                dest      = (rose_address *)(skb->data + 4);
+                lci_o     = 0xFFF - lci_i;
+
+                skb->h.raw = skb->data;
+
+                if ((sk = rose_find_socket(lci_o, rose_loopback_neigh)) != NULL) {
+                        if (rose_process_rx_frame(sk, skb) == 0)
+                                kfree_skb(skb);
+                        continue;
+                }
+
+                if (frametype == ROSE_CALL_REQUEST) {
+                        if ((dev = rose_dev_get(dest)) != NULL) {
+                                if (rose_rx_call_request(skb, dev, rose_loopback_neigh, lci_o) == 0)
+                                        kfree_skb(skb);
+                        } else {
+                                kfree_skb(skb);
+                        }
+                } else {
+                        kfree_skb(skb);
+                }
+        }
+}
+
+void __exit rose_loopback_clear(void)
+{
+        struct sk_buff *skb;
+
+        del_timer(&loopback_timer);
+
+        while ((skb = skb_dequeue(&loopback_queue)) != NULL) {
+                skb->sk = NULL;
+                kfree_skb(skb);
+        }
+}