patch-2.1.27 linux/net/ax25/ax25_dev.c

• Lines: 216
• Date: Tue Feb 25 17:12:51 1997
• Orig file: v2.1.26/linux/net/ax25/ax25_dev.c
• Orig date: Wed Dec 31 16:00:00 1969

diff -u --recursive --new-file v2.1.26/linux/net/ax25/ax25_dev.c linux/net/ax25/ax25_dev.c
@@ -0,0 +1,215 @@
+/*
+ *	AX.25 release 036
+ *
+ *	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/ NET3.038
+ *
+ *	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.
+ *
+ *	Other kernels modules in this kit are generally BSD derived. See the copyright headers.
+ *
+ *
+ *	History
+ *	AX.25 036	Jonathan(G4KLX)	Split from ax25_route.c.
+ */
+
+#include <linux/config.h>
+#if defined(CONFIG_AX25) || defined(CONFIG_AX25_MODULE)
+#include <linux/errno.h>
+#include <linux/types.h>
+#include <linux/socket.h>
+#include <linux/in.h>
+#include <linux/kernel.h>
+#include <linux/sched.h>
+#include <linux/timer.h>
+#include <linux/string.h>
+#include <linux/sockios.h>
+#include <linux/net.h>
+#include <net/ax25.h>
+#include <linux/inet.h>
+#include <linux/netdevice.h>
+#include <linux/if_arp.h>
+#include <linux/skbuff.h>
+#include <net/sock.h>
+#include <asm/uaccess.h>
+#include <asm/system.h>
+#include <linux/fcntl.h>
+#include <linux/mm.h>
+#include <linux/interrupt.h>
+
+ax25_dev *ax25_dev_list = NULL;
+
+ax25_dev *ax25_dev_ax25dev(struct device *dev)
+{
+	ax25_dev *ax25_dev;
+
+	for (ax25_dev = ax25_dev_list; ax25_dev != NULL; ax25_dev = ax25_dev->next)
+		if (ax25_dev->dev == dev)
+			return ax25_dev;
+
+	return NULL;
+}
+
+ax25_dev *ax25_addr_ax25dev(ax25_address *addr)
+{
+	ax25_dev *ax25_dev;
+
+	for (ax25_dev = ax25_dev_list; ax25_dev != NULL; ax25_dev = ax25_dev->next)
+		if (ax25cmp(addr, (ax25_address *)ax25_dev->dev->dev_addr) == 0)
+			return ax25_dev;
+
+	return NULL;
+}
+
+/*
+ *	This is called when an interface is brought up. These are
+ *	reasonable defaults.
+ */
+void ax25_dev_device_up(struct device *dev)
+{
+	ax25_dev *ax25_dev;
+	unsigned long flags;
+
+	if ((ax25_dev = kmalloc(sizeof(*ax25_dev), GFP_ATOMIC)) == NULL) {
+		printk(KERN_ERR "ax25_dev_device_up out of memory\n");
+		return;
+	}
+
+	ax25_unregister_sysctl();
+
+	ax25_dev->dev     = dev;
+	ax25_dev->forward = NULL;
+
+	ax25_dev->values[AX25_VALUES_IPDEFMODE] = AX25_DEF_IPDEFMODE;
+	ax25_dev->values[AX25_VALUES_AXDEFMODE] = AX25_DEF_AXDEFMODE;
+	ax25_dev->values[AX25_VALUES_BACKOFF]   = AX25_DEF_BACKOFF;
+	ax25_dev->values[AX25_VALUES_CONMODE]   = AX25_DEF_CONMODE;
+	ax25_dev->values[AX25_VALUES_WINDOW]    = AX25_DEF_WINDOW;
+	ax25_dev->values[AX25_VALUES_EWINDOW]   = AX25_DEF_EWINDOW;
+	ax25_dev->values[AX25_VALUES_T1]        = AX25_DEF_T1;
+	ax25_dev->values[AX25_VALUES_T2]        = AX25_DEF_T2;
+	ax25_dev->values[AX25_VALUES_T3]        = AX25_DEF_T3;
+	ax25_dev->values[AX25_VALUES_IDLE]	= AX25_DEF_IDLE;
+	ax25_dev->values[AX25_VALUES_N2]        = AX25_DEF_N2;
+	ax25_dev->values[AX25_VALUES_PACLEN]	= AX25_DEF_PACLEN;
+	ax25_dev->values[AX25_VALUES_PROTOCOL]  = AX25_DEF_PROTOCOL;
+
+	save_flags(flags); cli();
+	ax25_dev->next = ax25_dev_list;
+	ax25_dev_list  = ax25_dev;
+	restore_flags(flags);
+
+	ax25_register_sysctl();
+}
+
+void ax25_dev_device_down(struct device *dev)
+{
+	ax25_dev *s, *ax25_dev;
+	unsigned long flags;
+
+	if ((ax25_dev = ax25_dev_ax25dev(dev)) == NULL)
+		return;
+
+	ax25_unregister_sysctl();
+
+	save_flags(flags); cli();
+
+	/*
+	 *	Remove any packet forwarding that points to this device.
+	 */
+	for (s = ax25_dev_list; s != NULL; s = s->next)
+		if (s->forward == dev)
+			s->forward = NULL;
+
+	if ((s = ax25_dev_list) == ax25_dev) {
+		ax25_dev_list = s->next;
+		restore_flags(flags);
+		kfree_s(ax25_dev, sizeof(ax25_dev));
+		ax25_register_sysctl();
+		return;
+	}
+
+	while (s != NULL && s->next != NULL) {
+		if (s->next == ax25_dev) {
+			s->next = ax25_dev->next;
+			restore_flags(flags);
+			kfree_s(ax25_dev, sizeof(ax25_dev));
+			ax25_register_sysctl();
+			return;
+		}
+
+		s = s->next;
+	}
+
+	restore_flags(flags);
+	ax25_register_sysctl();
+}
+
+int ax25_fwd_ioctl(unsigned int cmd, struct ax25_fwd_struct *fwd)
+{
+	ax25_dev *ax25_dev, *fwd_dev;
+
+	if ((ax25_dev = ax25_addr_ax25dev(&fwd->port_from)) == NULL)
+		return -EINVAL;
+
+	switch (cmd) {
+		case SIOCAX25ADDFWD:
+			if ((fwd_dev = ax25_addr_ax25dev(&fwd->port_to)) == NULL)
+				return -EINVAL;
+			if (ax25_dev->forward != NULL)
+				return -EINVAL;
+			ax25_dev->forward = fwd_dev->dev;
+			break;
+
+		case SIOCAX25DELFWD:
+			if (ax25_dev->forward == NULL)
+				return -EINVAL;
+			ax25_dev->forward = NULL;
+			break;
+
+		default:
+			return -EINVAL;
+	}
+
+	return 0;
+}
+
+struct device *ax25_fwd_dev(struct device *dev)
+{
+	ax25_dev *ax25_dev;
+
+	if ((ax25_dev = ax25_dev_ax25dev(dev)) == NULL)
+		return dev;
+
+	if (ax25_dev->forward == NULL)
+		return dev;
+
+	return ax25_dev->forward;
+}
+
+#ifdef MODULE
+
+/*
+ *	Free all memory associated with device structures.
+ */
+void ax25_dev_free(void)
+{
+	ax25_dev *s, *ax25_dev = ax25_dev_list;
+
+	while (ax25_dev != NULL) {
+		s        = ax25_dev;
+		ax25_dev = ax25_dev->next;
+
+		kfree_s(s, sizeof(ax25_dev));
+	}
+}
+
+#endif
+
+#endif