patch-2.4.21 linux-2.4.21/drivers/net/wan/hdlc_generic.c

• Lines: 198
• Date: 2003-06-13 07:51:35.000000000 -0700
• Orig file: linux-2.4.20/drivers/net/wan/hdlc_generic.c
• Orig date: 1969-12-31 16:00:00.000000000 -0800

diff -urN linux-2.4.20/drivers/net/wan/hdlc_generic.c linux-2.4.21/drivers/net/wan/hdlc_generic.c
@@ -0,0 +1,197 @@
+/*
+ * Generic HDLC support routines for Linux
+ *
+ * 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.
+ *
+ * Current status:
+ *    - this is work in progress
+ *    - not heavily tested on SMP
+ *    - currently supported:
+ *	* raw IP-in-HDLC
+ *	* Cisco HDLC
+ *	* Frame Relay with ANSI or CCITT LMI (both user and network side)
+ *	* PPP
+ *	* X.25
+ *
+ * Use sethdlc utility to set line parameters, protocol and PVCs
+ */
+
+#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>
+
+
+static const char* version = "HDLC support module revision 1.11";
+
+
+static int hdlc_change_mtu(struct net_device *dev, int new_mtu)
+{
+	if ((new_mtu < 68) || (new_mtu > HDLC_MAX_MTU))
+		return -EINVAL;
+	dev->mtu = new_mtu;
+	return 0;
+}
+
+
+
+static struct net_device_stats *hdlc_get_stats(struct net_device *dev)
+{
+	return &dev_to_hdlc(dev)->stats;
+}
+
+
+
+static int hdlc_rcv(struct sk_buff *skb, struct net_device *dev,
+		    struct packet_type *p)
+{
+	dev_to_hdlc(dev)->netif_rx(skb);
+	return 0;
+}
+
+
+#ifndef CONFIG_HDLC_RAW
+#define hdlc_raw_ioctl(hdlc, ifr)	-ENOSYS
+#endif
+
+#ifndef CONFIG_HDLC_PPP
+#define hdlc_ppp_ioctl(hdlc, ifr)	-ENOSYS
+#endif
+
+#ifndef CONFIG_HDLC_CISCO
+#define hdlc_cisco_ioctl(hdlc, ifr)	-ENOSYS
+#endif
+
+#ifndef CONFIG_HDLC_FR
+#define hdlc_fr_ioctl(hdlc, ifr)	-ENOSYS
+#endif
+
+#ifndef CONFIG_HDLC_X25
+#define hdlc_x25_ioctl(hdlc, ifr)	-ENOSYS
+#endif
+
+
+int hdlc_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd)
+{
+	hdlc_device *hdlc = dev_to_hdlc(dev);
+	unsigned int proto;
+
+	if (cmd != SIOCWANDEV)
+		return -EINVAL;
+
+	switch(ifr->ifr_settings.type) {
+	case IF_PROTO_HDLC:
+	case IF_PROTO_PPP:
+	case IF_PROTO_CISCO:
+	case IF_PROTO_FR:
+	case IF_PROTO_X25:
+		proto = ifr->ifr_settings.type;
+		break;
+
+	default:
+		proto = hdlc->proto;
+	}
+
+	switch(proto) {
+	case IF_PROTO_HDLC:	return hdlc_raw_ioctl(hdlc, ifr);
+	case IF_PROTO_PPP:	return hdlc_ppp_ioctl(hdlc, ifr);
+	case IF_PROTO_CISCO:	return hdlc_cisco_ioctl(hdlc, ifr);
+	case IF_PROTO_FR:	return hdlc_fr_ioctl(hdlc, ifr);
+	case IF_PROTO_X25:	return hdlc_x25_ioctl(hdlc, ifr);
+	default:		return -EINVAL;
+	}
+}
+
+
+
+int register_hdlc_device(hdlc_device *hdlc)
+{
+	int result;
+	struct net_device *dev = hdlc_to_dev(hdlc);
+
+	dev->get_stats = hdlc_get_stats;
+	dev->change_mtu = hdlc_change_mtu;
+	dev->mtu = HDLC_MAX_MTU;
+
+	dev->type = ARPHRD_RAWHDLC;
+	dev->hard_header_len = 16;
+
+	dev->flags = IFF_POINTOPOINT | IFF_NOARP;
+
+	hdlc->proto = -1;
+	hdlc->proto_detach = NULL;
+
+	result = dev_alloc_name(dev, "hdlc%d");
+	if (result<0)
+		return result;
+
+	result = register_netdev(dev);
+	if (result != 0)
+		return -EIO;
+
+	MOD_INC_USE_COUNT;
+	return 0;
+}
+
+
+
+void unregister_hdlc_device(hdlc_device *hdlc)
+{
+	hdlc_proto_detach(hdlc);
+
+	unregister_netdev(hdlc_to_dev(hdlc));
+	MOD_DEC_USE_COUNT;
+}
+
+
+
+MODULE_AUTHOR("Krzysztof Halasa <khc@pm.waw.pl>");
+MODULE_DESCRIPTION("HDLC support module");
+MODULE_LICENSE("GPL");
+
+EXPORT_SYMBOL(hdlc_ioctl);
+EXPORT_SYMBOL(register_hdlc_device);
+EXPORT_SYMBOL(unregister_hdlc_device);
+
+struct packet_type hdlc_packet_type=
+{
+        __constant_htons(ETH_P_HDLC),
+        NULL,
+        hdlc_rcv,
+        NULL,
+        NULL
+};
+
+
+static int __init hdlc_module_init(void)
+{
+	printk(KERN_INFO "%s\n", version);
+        dev_add_pack(&hdlc_packet_type);
+	return 0;
+}
+
+
+
+static void __exit hdlc_module_exit(void)
+{
+	dev_remove_pack(&hdlc_packet_type);
+}
+
+
+module_init(hdlc_module_init);
+module_exit(hdlc_module_exit);