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[/] [or1k/] [trunk/] [linux/] [linux-2.4/] [net/] [ax25/] [ax25_dev.c] - Blame information for rev 1765

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Line No. Rev Author Line
1 1275 phoenix 
/*
2 
 *      AX.25 release 037
3 
 *
4 
 *      This code REQUIRES 2.1.15 or higher/ NET3.038
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 *
6 
 *      This module:
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 *              This module is free software; you can redistribute it and/or
8 
 *              modify it under the terms of the GNU General Public License
9 
 *              as published by the Free Software Foundation; either version
10 
 *              2 of the License, or (at your option) any later version.
11 
 *
12 
 *      Other kernels modules in this kit are generally BSD derived. See the copyright headers.
13 
 *
14 
 *
15 
 *      History
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 *      AX.25 036       Jonathan(G4KLX) Split from ax25_route.c.
17 
 */
18 
 
19 
#include <linux/config.h>
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#include <linux/errno.h>
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#include <linux/types.h>
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#include <linux/socket.h>
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#include <linux/in.h>
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#include <linux/kernel.h>
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#include <linux/sched.h>
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#include <linux/timer.h>
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#include <linux/string.h>
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#include <linux/sockios.h>
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#include <linux/net.h>
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#include <net/ax25.h>
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#include <linux/inet.h>
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#include <linux/netdevice.h>
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#include <linux/if_arp.h>
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#include <linux/skbuff.h>
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#include <net/sock.h>
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#include <asm/uaccess.h>
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#include <asm/system.h>
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#include <linux/fcntl.h>
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#include <linux/mm.h>
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#include <linux/interrupt.h>
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#include <linux/init.h>
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43 
ax25_dev *ax25_dev_list;
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45 
ax25_dev *ax25_dev_ax25dev(struct net_device *dev)
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{
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        ax25_dev *ax25_dev;
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        for (ax25_dev = ax25_dev_list; ax25_dev != NULL; ax25_dev = ax25_dev->next)
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                if (ax25_dev->dev == dev)
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                        return ax25_dev;
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53 
        return NULL;
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}
55 
 
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ax25_dev *ax25_addr_ax25dev(ax25_address *addr)
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{
58 
        ax25_dev *ax25_dev;
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60 
        for (ax25_dev = ax25_dev_list; ax25_dev != NULL; ax25_dev = ax25_dev->next)
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                if (ax25cmp(addr, (ax25_address *)ax25_dev->dev->dev_addr) == 0)
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                        return ax25_dev;
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64 
        return NULL;
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}
66 
 
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/*
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 *      This is called when an interface is brought up. These are
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 *      reasonable defaults.
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 */
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void ax25_dev_device_up(struct net_device *dev)
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{
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        ax25_dev *ax25_dev;
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        unsigned long flags;
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        if ((ax25_dev = kmalloc(sizeof(*ax25_dev), GFP_ATOMIC)) == NULL) {
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                printk(KERN_ERR "AX.25: ax25_dev_device_up - out of memory\n");
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                return;
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        }
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        ax25_unregister_sysctl();
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        memset(ax25_dev, 0x00, sizeof(*ax25_dev));
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        ax25_dev->dev     = dev;
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        ax25_dev->forward = NULL;
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        ax25_dev->values[AX25_VALUES_IPDEFMODE] = AX25_DEF_IPDEFMODE;
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        ax25_dev->values[AX25_VALUES_AXDEFMODE] = AX25_DEF_AXDEFMODE;
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        ax25_dev->values[AX25_VALUES_BACKOFF]   = AX25_DEF_BACKOFF;
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        ax25_dev->values[AX25_VALUES_CONMODE]   = AX25_DEF_CONMODE;
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        ax25_dev->values[AX25_VALUES_WINDOW]    = AX25_DEF_WINDOW;
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        ax25_dev->values[AX25_VALUES_EWINDOW]   = AX25_DEF_EWINDOW;
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        ax25_dev->values[AX25_VALUES_T1]        = AX25_DEF_T1;
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        ax25_dev->values[AX25_VALUES_T2]        = AX25_DEF_T2;
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        ax25_dev->values[AX25_VALUES_T3]        = AX25_DEF_T3;
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        ax25_dev->values[AX25_VALUES_IDLE]      = AX25_DEF_IDLE;
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        ax25_dev->values[AX25_VALUES_N2]        = AX25_DEF_N2;
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        ax25_dev->values[AX25_VALUES_PACLEN]    = AX25_DEF_PACLEN;
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        ax25_dev->values[AX25_VALUES_PROTOCOL]  = AX25_DEF_PROTOCOL;
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        ax25_dev->values[AX25_VALUES_DS_TIMEOUT]= AX25_DEF_DS_TIMEOUT;
102 
 
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        save_flags(flags); cli();
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        ax25_dev->next = ax25_dev_list;
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        ax25_dev_list  = ax25_dev;
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        restore_flags(flags);
107 
 
108 
        ax25_register_sysctl();
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}
110 
 
111 
void ax25_dev_device_down(struct net_device *dev)
112 
{
113 
        ax25_dev *s, *ax25_dev;
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        unsigned long flags;
115 
 
116 
        if ((ax25_dev = ax25_dev_ax25dev(dev)) == NULL)
117 
                return;
118 
 
119 
        ax25_unregister_sysctl();
120 
 
121 
        save_flags(flags); cli();
122 
 
123 
#ifdef CONFIG_AX25_DAMA_SLAVE
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        ax25_ds_del_timer(ax25_dev);
125 
#endif
126 
 
127 
        /*
128 
         *      Remove any packet forwarding that points to this device.
129 
         */
130 
        for (s = ax25_dev_list; s != NULL; s = s->next)
131 
                if (s->forward == dev)
132 
                        s->forward = NULL;
133 
 
134 
        if ((s = ax25_dev_list) == ax25_dev) {
135 
                ax25_dev_list = s->next;
136 
                restore_flags(flags);
137 
                kfree(ax25_dev);
138 
                ax25_register_sysctl();
139 
                return;
140 
        }
141 
 
142 
        while (s != NULL && s->next != NULL) {
143 
                if (s->next == ax25_dev) {
144 
                        s->next = ax25_dev->next;
145 
                        restore_flags(flags);
146 
                        kfree(ax25_dev);
147 
                        ax25_register_sysctl();
148 
                        return;
149 
                }
150 
 
151 
                s = s->next;
152 
        }
153 
 
154 
        restore_flags(flags);
155 
        ax25_register_sysctl();
156 
}
157 
 
158 
int ax25_fwd_ioctl(unsigned int cmd, struct ax25_fwd_struct *fwd)
159 
{
160 
        ax25_dev *ax25_dev, *fwd_dev;
161 
 
162 
        if ((ax25_dev = ax25_addr_ax25dev(&fwd->port_from)) == NULL)
163 
                return -EINVAL;
164 
 
165 
        switch (cmd) {
166 
                case SIOCAX25ADDFWD:
167 
                        if ((fwd_dev = ax25_addr_ax25dev(&fwd->port_to)) == NULL)
168 
                                return -EINVAL;
169 
                        if (ax25_dev->forward != NULL)
170 
                                return -EINVAL;
171 
                        ax25_dev->forward = fwd_dev->dev;
172 
                        break;
173 
 
174 
                case SIOCAX25DELFWD:
175 
                        if (ax25_dev->forward == NULL)
176 
                                return -EINVAL;
177 
                        ax25_dev->forward = NULL;
178 
                        break;
179 
 
180 
                default:
181 
                        return -EINVAL;
182 
        }
183 
 
184 
        return 0;
185 
}
186 
 
187 
struct net_device *ax25_fwd_dev(struct net_device *dev)
188 
{
189 
        ax25_dev *ax25_dev;
190 
 
191 
        if ((ax25_dev = ax25_dev_ax25dev(dev)) == NULL)
192 
                return dev;
193 
 
194 
        if (ax25_dev->forward == NULL)
195 
                return dev;
196 
 
197 
        return ax25_dev->forward;
198 
}
199 
 
200 
/*
201 
 *      Free all memory associated with device structures.
202 
 */
203 
void __exit ax25_dev_free(void)
204 
{
205 
        ax25_dev *s, *ax25_dev = ax25_dev_list;
206 
 
207 
        while (ax25_dev != NULL) {
208 
                s        = ax25_dev;
209 
                ax25_dev = ax25_dev->next;
210 
 
211 
                kfree(s);
212 
        }
213 
}

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