From 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 Mon Sep 17 00:00:00 2001
From: Linus Torvalds <torvalds@ppc970.osdl.org>
Date: Sat, 16 Apr 2005 15:20:36 -0700
Subject: Linux-2.6.12-rc2

Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.

Let it rip!
---
 net/rose/rose_loopback.c | 111 +++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 111 insertions(+)
 create mode 100644 net/rose/rose_loopback.c

(limited to 'net/rose/rose_loopback.c')

diff --git a/net/rose/rose_loopback.c b/net/rose/rose_loopback.c
new file mode 100644
index 00000000000..103b4d38f88
--- /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);
+	}
+}
-- 
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