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, 219 insertions, 0 deletions

diff --git a/drivers/net/wan/hdlc_x25.c b/drivers/net/wan/hdlc_x25.c
new file mode 100644
index 000000000000..07e5eef1fe0f
--- /dev/null
+++ b/drivers/net/wan/hdlc_x25.c
@@ -0,0 +1,219 @@
+/*
+ * Generic HDLC support routines for Linux
+ * X.25 support
+ *
+ * Copyright (C) 1999 - 2003 Krzysztof Halasa <khc@pm.waw.pl>
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of version 2 of the GNU General Public License
+ * as published by the Free Software Foundation.
+ */
+
+#include <linux/module.h>
+#include <linux/kernel.h>
+#include <linux/slab.h>
+#include <linux/poll.h>
+#include <linux/errno.h>
+#include <linux/if_arp.h>
+#include <linux/init.h>
+#include <linux/skbuff.h>
+#include <linux/pkt_sched.h>
+#include <linux/inetdevice.h>
+#include <linux/lapb.h>
+#include <linux/rtnetlink.h>
+#include <linux/hdlc.h>
+
+#include <net/x25device.h>
+
+/* These functions are callbacks called by LAPB layer */
+
+static void x25_connect_disconnect(struct net_device *dev, int reason, int code)
+{
+        struct sk_buff *skb;
+        unsigned char *ptr;
+
+        if ((skb = dev_alloc_skb(1)) == NULL) {
+                printk(KERN_ERR "%s: out of memory\n", dev->name);
+                return;
+        }
+
+        ptr = skb_put(skb, 1);
+        *ptr = code;
+
+        skb->protocol = x25_type_trans(skb, dev);
+        netif_rx(skb);
+}
+
+
+
+static void x25_connected(struct net_device *dev, int reason)
+{
+        x25_connect_disconnect(dev, reason, 1);
+}
+
+
+
+static void x25_disconnected(struct net_device *dev, int reason)
+{
+        x25_connect_disconnect(dev, reason, 2);
+}
+
+
+
+static int x25_data_indication(struct net_device *dev, struct sk_buff *skb)
+{
+        unsigned char *ptr;
+
+        skb_push(skb, 1);
+
+        if (skb_cow(skb, 1))
+                return NET_RX_DROP;
+
+        ptr  = skb->data;
+        *ptr = 0;
+
+        skb->protocol = x25_type_trans(skb, dev);
+        return netif_rx(skb);
+}
+
+
+
+static void x25_data_transmit(struct net_device *dev, struct sk_buff *skb)
+{
+        hdlc_device *hdlc = dev_to_hdlc(dev);
+        hdlc->xmit(skb, dev); /* Ignore return value :-( */
+}
+
+
+
+static int x25_xmit(struct sk_buff *skb, struct net_device *dev)
+{
+        int result;
+
+
+        /* X.25 to LAPB */
+        switch (skb->data[0]) {
+        case 0:         /* Data to be transmitted */
+                skb_pull(skb, 1);
+                if ((result = lapb_data_request(dev, skb)) != LAPB_OK)
+                        dev_kfree_skb(skb);
+                return 0;
+
+        case 1:
+                if ((result = lapb_connect_request(dev))!= LAPB_OK) {
+                        if (result == LAPB_CONNECTED)
+                                /* Send connect confirm. msg to level 3 */
+                                x25_connected(dev, 0);
+                        else
+                                printk(KERN_ERR "%s: LAPB connect request "
+                                       "failed, error code = %i\n",
+                                       dev->name, result);
+                }
+                break;
+
+        case 2:
+                if ((result = lapb_disconnect_request(dev)) != LAPB_OK) {
+                        if (result == LAPB_NOTCONNECTED)
+                                /* Send disconnect confirm. msg to level 3 */
+                                x25_disconnected(dev, 0);
+                        else
+                                printk(KERN_ERR "%s: LAPB disconnect request "
+                                       "failed, error code = %i\n",
+                                       dev->name, result);
+                }
+                break;
+
+        default:                /* to be defined */
+                break;
+        }
+
+        dev_kfree_skb(skb);
+        return 0;
+}
+
+
+
+static int x25_open(struct net_device *dev)
+{
+        struct lapb_register_struct cb;
+        int result;
+
+        cb.connect_confirmation = x25_connected;
+        cb.connect_indication = x25_connected;
+        cb.disconnect_confirmation = x25_disconnected;
+        cb.disconnect_indication = x25_disconnected;
+        cb.data_indication = x25_data_indication;
+        cb.data_transmit = x25_data_transmit;
+
+        result = lapb_register(dev, &cb);
+        if (result != LAPB_OK)
+                return result;
+        return 0;
+}
+
+
+
+static void x25_close(struct net_device *dev)
+{
+        lapb_unregister(dev);
+}
+
+
+
+static int x25_rx(struct sk_buff *skb)
+{
+        hdlc_device *hdlc = dev_to_hdlc(skb->dev);
+
+        if ((skb = skb_share_check(skb, GFP_ATOMIC)) == NULL) {
+                hdlc->stats.rx_dropped++;
+                return NET_RX_DROP;
+        }
+
+        if (lapb_data_received(skb->dev, skb) == LAPB_OK)
+                return NET_RX_SUCCESS;
+
+        hdlc->stats.rx_errors++;
+        dev_kfree_skb_any(skb);
+        return NET_RX_DROP;
+}
+
+
+
+int hdlc_x25_ioctl(struct net_device *dev, struct ifreq *ifr)
+{
+        hdlc_device *hdlc = dev_to_hdlc(dev);
+        int result;
+
+        switch (ifr->ifr_settings.type) {
+        case IF_GET_PROTO:
+                ifr->ifr_settings.type = IF_PROTO_X25;
+                return 0; /* return protocol only, no settable parameters */
+
+        case IF_PROTO_X25:
+                if(!capable(CAP_NET_ADMIN))
+                        return -EPERM;
+
+                if(dev->flags & IFF_UP)
+                        return -EBUSY;
+
+                result=hdlc->attach(dev, ENCODING_NRZ,PARITY_CRC16_PR1_CCITT);
+                if (result)
+                        return result;
+
+                hdlc_proto_detach(hdlc);
+                memset(&hdlc->proto, 0, sizeof(hdlc->proto));
+
+                hdlc->proto.open = x25_open;
+                hdlc->proto.close = x25_close;
+                hdlc->proto.netif_rx = x25_rx;
+                hdlc->proto.type_trans = NULL;
+                hdlc->proto.id = IF_PROTO_X25;
+                dev->hard_start_xmit = x25_xmit;
+                dev->hard_header = NULL;
+                dev->type = ARPHRD_X25;
+                dev->addr_len = 0;
+                return 0;
+        }
+
+        return -EINVAL;
+}