Linux-2.6.12-rc2v2.6.12-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);
+}