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/*
* AX.25 release 037
*
* 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 "AX.25: ax25_dev_device_up - out of memory\n");
return;
}
#ifdef CONFIG_SYSCTL
ax25_unregister_sysctl();
#endif
memset(ax25_dev, 0x00, sizeof(*ax25_dev));
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;
ax25_dev->values[AX25_VALUES_DS_TIMEOUT]= AX25_DEF_DS_TIMEOUT;
save_flags(flags); cli();
ax25_dev->next = ax25_dev_list;
ax25_dev_list = ax25_dev;
restore_flags(flags);
#ifdef CONFIG_SYSCTL
ax25_register_sysctl();
#endif
}
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;
#ifdef CONFIG_SYSCTL
ax25_unregister_sysctl();
#endif
save_flags(flags); cli();
#ifdef CONFIG_AX25_DAMA_SLAVE
ax25_ds_del_timer(ax25_dev);
#endif
/*
* 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(ax25_dev);
#ifdef CONFIG_SYSCTL
ax25_register_sysctl();
#endif
return;
}
while (s != NULL && s->next != NULL) {
if (s->next == ax25_dev) {
s->next = ax25_dev->next;
restore_flags(flags);
kfree(ax25_dev);
#ifdef CONFIG_SYSCTL
ax25_register_sysctl();
#endif
return;
}
s = s->next;
}
restore_flags(flags);
#ifdef CONFIG_SYSCTL
ax25_register_sysctl();
#endif
}
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);
}
}
#endif
#endif
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