patch-2.0.36 linux/net/rose/rose_loopback.c

• Lines: 136
• Date: Sun Nov 15 10:33:22 1998
• Orig file: v2.0.35/linux/net/rose/rose_loopback.c
• Orig date: Wed Dec 31 16:00:00 1969

diff -u --recursive --new-file v2.0.35/linux/net/rose/rose_loopback.c linux/net/rose/rose_loopback.c
@@ -0,0 +1,135 @@
+/*
+ *	ROSE release 003
+ *
+ *	This code REQUIRES 2.1.15 or higher/ NET3.038
+ *
+ *	This module:
+ *		This module 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.
+ *
+ *	History
+ *	ROSE 003	Jonathan(G4KLX)	Created this file from nr_loopback.c.
+ *
+ */
+
+#include <linux/config.h>
+#if defined(CONFIG_ROSE) || defined(CONFIG_ROSE_MODULE)
+#include <linux/types.h>
+#include <linux/socket.h>
+#include <linux/timer.h>
+#include <net/ax25.h>
+#include <linux/skbuff.h>
+#include <net/rose.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);
+}
+
+void 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, FREE_READ);
+	}
+}
+
+static int rose_loopback_running(void)
+{
+	return (loopback_timer.prev != NULL || loopback_timer.next != NULL);
+}
+
+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, FREE_WRITE);
+
+	if (skbn != NULL) {
+		skbn->sk = (struct sock *)neigh;
+		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 rose_neigh *rose_neigh;
+	struct sock *sk;
+	struct device *dev;
+	rose_address *dest_addr;
+	unsigned int lci;
+	unsigned short frametype;
+
+	while ((skb = skb_dequeue(&loopback_queue)) != NULL) {
+		rose_neigh = (struct rose_neigh *)skb->sk;
+		lci        = ((skb->data[0] << 8) & 0xF00) + ((skb->data[1] << 0) & 0x0FF);
+		dest_addr = (rose_address *)(skb->data + 4);
+
+		/* F1OAT : Patch the LCI for proper loopback operation */
+		/* Work only if the system open less than 2048 VC !!! */
+		
+		lci = 4096 - lci;
+		skb->data[0] = (lci >> 8) & 0x0F;
+		skb->data[1] = lci & 0xFF;
+		
+		skb->sk = NULL;
+
+		frametype = skb->data[2];
+
+		if (frametype == ROSE_CALL_REQUEST) {
+			if ((dev = rose_dev_get(dest_addr)) == NULL) {
+				kfree_skb(skb, FREE_READ);
+				continue;			
+			}
+			if (!rose_rx_call_request(skb, dev, rose_neigh, lci))
+				kfree_skb(skb, FREE_READ); 
+		}
+		else {
+			if ((sk = rose_find_socket(lci, rose_neigh)) == NULL) {
+				kfree_skb(skb, FREE_READ);
+				continue;
+			}
+			skb->h.raw = skb->data;
+
+			if (rose_process_rx_frame(sk, skb) == 0)
+				kfree_skb(skb, FREE_READ); 
+		}
+	}
+}
+
+#endif