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!

1 files changed, 207 insertions, 0 deletions

diff --git a/net/x25/x25_dev.c b/net/x25/x25_dev.c
new file mode 100644
index 000000000000..36fc3bf6d882
--- /dev/null
+++ b/net/x25/x25_dev.c
@@ -0,0 +1,207 @@
+/*
+ *	X.25 Packet Layer release 002
+ *
+ *	This is ALPHA test software. This code may break your machine, randomly fail to work with new 
+ *	releases, misbehave and/or generally screw up. It might even work. 
+ *
+ *	This code REQUIRES 2.1.15 or higher
+ *
+ *	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
+ *	X.25 001	Jonathan Naylor	Started coding.
+ *      2000-09-04	Henner Eisen	Prevent freeing a dangling skb.
+ */
+
+#include <linux/config.h>
+#include <linux/kernel.h>
+#include <linux/netdevice.h>
+#include <linux/skbuff.h>
+#include <net/sock.h>
+#include <linux/if_arp.h>
+#include <net/x25.h>
+
+static int x25_receive_data(struct sk_buff *skb, struct x25_neigh *nb)
+{
+	struct sock *sk;
+	unsigned short frametype;
+	unsigned int lci;
+
+	frametype = skb->data[2];
+        lci = ((skb->data[0] << 8) & 0xF00) + ((skb->data[1] << 0) & 0x0FF);
+
+	/*
+	 *	LCI of zero is always for us, and its always a link control
+	 *	frame.
+	 */
+	if (lci == 0) {
+		x25_link_control(skb, nb, frametype);
+		return 0;
+	}
+
+	/*
+	 *	Find an existing socket.
+	 */
+	if ((sk = x25_find_socket(lci, nb)) != NULL) {
+		int queued = 1;
+
+		skb->h.raw = skb->data;
+		bh_lock_sock(sk);
+		if (!sock_owned_by_user(sk)) {
+			queued = x25_process_rx_frame(sk, skb);
+		} else {
+			sk_add_backlog(sk, skb);
+		}
+		bh_unlock_sock(sk);
+		return queued;
+	}
+
+	/*
+	 *	Is is a Call Request ? if so process it.
+	 */
+	if (frametype == X25_CALL_REQUEST)
+		return x25_rx_call_request(skb, nb, lci);
+
+	/*
+	 *	Its not a Call Request, nor is it a control frame.
+	 *      Let caller throw it away.
+	 */
+/*
+	x25_transmit_clear_request(nb, lci, 0x0D);
+*/
+
+	if (frametype != X25_CLEAR_CONFIRMATION)
+		printk(KERN_DEBUG "x25_receive_data(): unknown frame type %2x\n",frametype);
+
+	return 0;
+}
+
+int x25_lapb_receive_frame(struct sk_buff *skb, struct net_device *dev,
+			   struct packet_type *ptype)
+{
+	struct sk_buff *nskb;
+	struct x25_neigh *nb;
+
+	nskb = skb_copy(skb, GFP_ATOMIC);
+	if (!nskb)
+		goto drop;
+	kfree_skb(skb);
+	skb = nskb;
+
+	/*
+	 * Packet received from unrecognised device, throw it away.
+	 */
+	nb = x25_get_neigh(dev);
+	if (!nb) {
+		printk(KERN_DEBUG "X.25: unknown neighbour - %s\n", dev->name);
+		goto drop;
+	}
+
+	switch (skb->data[0]) {
+		case 0x00:
+			skb_pull(skb, 1);
+			if (x25_receive_data(skb, nb)) {
+				x25_neigh_put(nb);
+				goto out;
+			}
+			break;
+		case 0x01:
+			x25_link_established(nb);
+			break;
+		case 0x02:
+			x25_link_terminated(nb);
+			break;
+	}
+	x25_neigh_put(nb);
+drop:
+	kfree_skb(skb);
+out:
+	return 0;
+}
+
+void x25_establish_link(struct x25_neigh *nb)
+{
+	struct sk_buff *skb;
+	unsigned char *ptr;
+
+	switch (nb->dev->type) {
+		case ARPHRD_X25:
+			if ((skb = alloc_skb(1, GFP_ATOMIC)) == NULL) {
+				printk(KERN_ERR "x25_dev: out of memory\n");
+				return;
+			}
+			ptr  = skb_put(skb, 1);
+			*ptr = 0x01;
+			break;
+
+#if defined(CONFIG_LLC) || defined(CONFIG_LLC_MODULE)
+		case ARPHRD_ETHER:
+			return;
+#endif
+		default:
+			return;
+	}
+
+	skb->protocol = htons(ETH_P_X25);
+	skb->dev      = nb->dev;
+
+	dev_queue_xmit(skb);
+}
+
+void x25_terminate_link(struct x25_neigh *nb)
+{
+	struct sk_buff *skb;
+	unsigned char *ptr;
+
+#if defined(CONFIG_LLC) || defined(CONFIG_LLC_MODULE)
+	if (nb->dev->type == ARPHRD_ETHER)
+		return;
+#endif
+	if (nb->dev->type != ARPHRD_X25)
+		return;
+
+	skb = alloc_skb(1, GFP_ATOMIC);
+	if (!skb) {
+		printk(KERN_ERR "x25_dev: out of memory\n");
+		return;
+	}
+
+	ptr  = skb_put(skb, 1);
+	*ptr = 0x02;
+
+	skb->protocol = htons(ETH_P_X25);
+	skb->dev      = nb->dev;
+	dev_queue_xmit(skb);
+}
+
+void x25_send_frame(struct sk_buff *skb, struct x25_neigh *nb)
+{
+	unsigned char *dptr;
+
+	skb->nh.raw = skb->data;
+
+	switch (nb->dev->type) {
+		case ARPHRD_X25:
+			dptr  = skb_push(skb, 1);
+			*dptr = 0x00;
+			break;
+
+#if defined(CONFIG_LLC) || defined(CONFIG_LLC_MODULE)
+		case ARPHRD_ETHER:
+			kfree_skb(skb);
+			return;
+#endif
+		default:
+			kfree_skb(skb);
+			return;
+	}
+
+	skb->protocol = htons(ETH_P_X25);
+	skb->dev      = nb->dev;
+
+	dev_queue_xmit(skb);
+}