patch-2.4.21 linux-2.4.21/drivers/net/wan/hdlc_x25.c
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- Lines: 217
- Date:
2003-06-13 07:51:35.000000000 -0700
- Orig file:
linux-2.4.20/drivers/net/wan/hdlc_x25.c
- Orig date:
1969-12-31 16:00:00.000000000 -0800
diff -urN linux-2.4.20/drivers/net/wan/hdlc_x25.c linux-2.4.21/drivers/net/wan/hdlc_x25.c
@@ -0,0 +1,216 @@
+/*
+ * Generic HDLC support routines for Linux
+ * X.25 support
+ *
+ * Copyright (C) 1999 - 2001 Krzysztof Halasa <khc@pm.waw.pl>
+ *
+ * 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.
+ */
+
+#include <linux/config.h>
+#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>
+
+/* These functions are callbacks called by LAPB layer */
+
+static void x25_connect_disconnect(void *token, int reason, int code)
+{
+ hdlc_device *hdlc = token;
+ struct sk_buff *skb;
+ unsigned char *ptr;
+
+ if ((skb = dev_alloc_skb(1)) == NULL) {
+ printk(KERN_ERR "%s: out of memory\n", hdlc_to_name(hdlc));
+ return;
+ }
+
+ ptr = skb_put(skb, 1);
+ *ptr = code;
+
+ skb->dev = hdlc_to_dev(hdlc);
+ skb->protocol = htons(ETH_P_X25);
+ skb->mac.raw = skb->data;
+ skb->pkt_type = PACKET_HOST;
+
+ netif_rx(skb);
+}
+
+
+
+static void x25_connected(void *token, int reason)
+{
+ x25_connect_disconnect(token, reason, 1);
+}
+
+
+
+static void x25_disconnected(void *token, int reason)
+{
+ x25_connect_disconnect(token, reason, 2);
+}
+
+
+
+static int x25_data_indication(void *token, struct sk_buff *skb)
+{
+ hdlc_device *hdlc = token;
+ unsigned char *ptr;
+
+ ptr = skb_push(skb, 1);
+ *ptr = 0;
+
+ skb->dev = hdlc_to_dev(hdlc);
+ skb->protocol = htons(ETH_P_X25);
+ skb->mac.raw = skb->data;
+ skb->pkt_type = PACKET_HOST;
+
+ return netif_rx(skb);
+}
+
+
+
+static void x25_data_transmit(void *token, struct sk_buff *skb)
+{
+ hdlc_device *hdlc = token;
+ hdlc->xmit(skb, hdlc_to_dev(hdlc)); /* Ignore return value :-( */
+}
+
+
+
+static int x25_xmit(struct sk_buff *skb, struct net_device *dev)
+{
+ hdlc_device *hdlc = dev_to_hdlc(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(hdlc, skb)) != LAPB_OK)
+ dev_kfree_skb(skb);
+ return 0;
+
+ case 1:
+ if ((result = lapb_connect_request(hdlc))!= LAPB_OK) {
+ if (result == LAPB_CONNECTED)
+ /* Send connect confirm. msg to level 3 */
+ x25_connected(hdlc, 0);
+ else
+ printk(KERN_ERR "%s: LAPB connect request "
+ "failed, error code = %i\n",
+ hdlc_to_name(hdlc), result);
+ }
+ break;
+
+ case 2:
+ if ((result = lapb_disconnect_request(hdlc)) != LAPB_OK) {
+ if (result == LAPB_NOTCONNECTED)
+ /* Send disconnect confirm. msg to level 3 */
+ x25_disconnected(hdlc, 0);
+ else
+ printk(KERN_ERR "%s: LAPB disconnect request "
+ "failed, error code = %i\n",
+ hdlc_to_name(hdlc), result);
+ }
+ break;
+
+ default: /* to be defined */
+ break;
+ }
+
+ dev_kfree_skb(skb);
+ return 0;
+}
+
+
+
+static int x25_open(hdlc_device *hdlc)
+{
+ 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(hdlc, &cb);
+ if (result != LAPB_OK)
+ return result;
+ return 0;
+}
+
+
+
+static void x25_close(hdlc_device *hdlc)
+{
+ lapb_unregister(hdlc);
+}
+
+
+
+static void x25_rx(struct sk_buff *skb)
+{
+ hdlc_device *hdlc = dev_to_hdlc(skb->dev);
+
+ if (lapb_data_received(hdlc, skb) == LAPB_OK)
+ return;
+ hdlc->stats.rx_errors++;
+ dev_kfree_skb_any(skb);
+}
+
+
+
+int hdlc_x25_ioctl(hdlc_device *hdlc, struct ifreq *ifr)
+{
+ struct net_device *dev = hdlc_to_dev(hdlc);
+ 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(hdlc, ENCODING_NRZ,PARITY_CRC16_PR1_CCITT);
+ if (result)
+ return result;
+
+ hdlc_proto_detach(hdlc);
+
+ hdlc->open = x25_open;
+ hdlc->stop = x25_close;
+ hdlc->netif_rx = x25_rx;
+ hdlc->proto = 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;
+}
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