/*
|
/*
|
* AX.25 release 037
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* AX.25 release 037
|
*
|
*
|
* This code REQUIRES 2.1.15 or higher/ NET3.038
|
* This code REQUIRES 2.1.15 or higher/ NET3.038
|
*
|
*
|
* This module:
|
* This module:
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* This module is free software; you can redistribute it and/or
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* This module is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
|
* modify it under the terms of the GNU General Public License
|
* as published by the Free Software Foundation; either version
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* as published by the Free Software Foundation; either version
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* 2 of the License, or (at your option) any later version.
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* 2 of the License, or (at your option) any later version.
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*
|
*
|
* Other kernels modules in this kit are generally BSD derived. See the copyright headers.
|
* Other kernels modules in this kit are generally BSD derived. See the copyright headers.
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*
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*
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*
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*
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* History
|
* History
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* AX.25 020 Jonathan(G4KLX) First go.
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* AX.25 020 Jonathan(G4KLX) First go.
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* AX.25 022 Jonathan(G4KLX) Added the actual meat to this - we now have a nice heard list.
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* AX.25 022 Jonathan(G4KLX) Added the actual meat to this - we now have a nice heard list.
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* AX.25 025 Alan(GW4PTS) First cut at autobinding by route scan.
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* AX.25 025 Alan(GW4PTS) First cut at autobinding by route scan.
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* AX.25 028b Jonathan(G4KLX) Extracted AX25 control block from the
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* AX.25 028b Jonathan(G4KLX) Extracted AX25 control block from the
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* sock structure. Device removal now
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* sock structure. Device removal now
|
* removes the heard structure.
|
* removes the heard structure.
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* AX.25 029 Steven(GW7RRM) Added /proc information for uid/callsign mapping.
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* AX.25 029 Steven(GW7RRM) Added /proc information for uid/callsign mapping.
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* Jonathan(G4KLX) Handling of IP mode in the routing list and /proc entry.
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* Jonathan(G4KLX) Handling of IP mode in the routing list and /proc entry.
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* AX.25 030 Jonathan(G4KLX) Added digi-peaters to routing table, and
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* AX.25 030 Jonathan(G4KLX) Added digi-peaters to routing table, and
|
* ioctls to manipulate them. Added port
|
* ioctls to manipulate them. Added port
|
* configuration.
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* configuration.
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* AX.25 031 Jonathan(G4KLX) Added concept of default route.
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* AX.25 031 Jonathan(G4KLX) Added concept of default route.
|
* Joerg(DL1BKE) ax25_rt_build_path() find digipeater list and device by
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* Joerg(DL1BKE) ax25_rt_build_path() find digipeater list and device by
|
* destination call. Needed for IP routing via digipeater
|
* destination call. Needed for IP routing via digipeater
|
* Jonathan(G4KLX) Added routing for IP datagram packets.
|
* Jonathan(G4KLX) Added routing for IP datagram packets.
|
* Joerg(DL1BKE) Changed routing for IP datagram and VC to use a default
|
* Joerg(DL1BKE) Changed routing for IP datagram and VC to use a default
|
* route if available. Does not overwrite default routes
|
* route if available. Does not overwrite default routes
|
* on route-table overflow anymore.
|
* on route-table overflow anymore.
|
* Joerg(DL1BKE) Fixed AX.25 routing of IP datagram and VC, new ioctl()
|
* Joerg(DL1BKE) Fixed AX.25 routing of IP datagram and VC, new ioctl()
|
* "SIOCAX25OPTRT" to set IP mode and a 'permanent' flag
|
* "SIOCAX25OPTRT" to set IP mode and a 'permanent' flag
|
* on routes.
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* on routes.
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* AX.25 033 Jonathan(G4KLX) Remove auto-router.
|
* AX.25 033 Jonathan(G4KLX) Remove auto-router.
|
* Joerg(DL1BKE) Moved BPQ Ethernet driver to separate device.
|
* Joerg(DL1BKE) Moved BPQ Ethernet driver to separate device.
|
* AX.25 035 Frederic(F1OAT) Support for pseudo-digipeating.
|
* AX.25 035 Frederic(F1OAT) Support for pseudo-digipeating.
|
* Jonathan(G4KLX) Support for packet forwarding.
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* Jonathan(G4KLX) Support for packet forwarding.
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* Arnaldo C. Melo s/suser/capable/
|
* Arnaldo C. Melo s/suser/capable/
|
*/
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*/
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|
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#include <linux/errno.h>
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#include <linux/errno.h>
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#include <linux/types.h>
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#include <linux/types.h>
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#include <linux/socket.h>
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#include <linux/socket.h>
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#include <linux/in.h>
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#include <linux/in.h>
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#include <linux/kernel.h>
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#include <linux/kernel.h>
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#include <linux/sched.h>
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#include <linux/sched.h>
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#include <linux/timer.h>
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#include <linux/timer.h>
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#include <linux/string.h>
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#include <linux/string.h>
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#include <linux/sockios.h>
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#include <linux/sockios.h>
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#include <linux/net.h>
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#include <linux/net.h>
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#include <net/ax25.h>
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#include <net/ax25.h>
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#include <linux/inet.h>
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#include <linux/inet.h>
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#include <linux/netdevice.h>
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#include <linux/netdevice.h>
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#include <linux/if_arp.h>
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#include <linux/if_arp.h>
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#include <linux/skbuff.h>
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#include <linux/skbuff.h>
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#include <net/sock.h>
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#include <net/sock.h>
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#include <asm/uaccess.h>
|
#include <asm/uaccess.h>
|
#include <asm/system.h>
|
#include <asm/system.h>
|
#include <linux/fcntl.h>
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#include <linux/fcntl.h>
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#include <linux/mm.h>
|
#include <linux/mm.h>
|
#include <linux/interrupt.h>
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#include <linux/interrupt.h>
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#include <linux/init.h>
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#include <linux/init.h>
|
|
|
static ax25_route *ax25_route_list;
|
static ax25_route *ax25_route_list;
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|
|
static ax25_route *ax25_find_route(ax25_address *, struct net_device *);
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static ax25_route *ax25_find_route(ax25_address *, struct net_device *);
|
|
|
/*
|
/*
|
* small macro to drop non-digipeated digipeaters and reverse path
|
* small macro to drop non-digipeated digipeaters and reverse path
|
*/
|
*/
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static inline void ax25_route_invert(ax25_digi *in, ax25_digi *out)
|
static inline void ax25_route_invert(ax25_digi *in, ax25_digi *out)
|
{
|
{
|
int k;
|
int k;
|
|
|
for (k = 0; k < in->ndigi; k++)
|
for (k = 0; k < in->ndigi; k++)
|
if (!in->repeated[k])
|
if (!in->repeated[k])
|
break;
|
break;
|
|
|
in->ndigi = k;
|
in->ndigi = k;
|
|
|
ax25_digi_invert(in, out);
|
ax25_digi_invert(in, out);
|
}
|
}
|
|
|
void ax25_rt_device_down(struct net_device *dev)
|
void ax25_rt_device_down(struct net_device *dev)
|
{
|
{
|
ax25_route *s, *t, *ax25_rt = ax25_route_list;
|
ax25_route *s, *t, *ax25_rt = ax25_route_list;
|
|
|
while (ax25_rt != NULL) {
|
while (ax25_rt != NULL) {
|
s = ax25_rt;
|
s = ax25_rt;
|
ax25_rt = ax25_rt->next;
|
ax25_rt = ax25_rt->next;
|
|
|
if (s->dev == dev) {
|
if (s->dev == dev) {
|
if (ax25_route_list == s) {
|
if (ax25_route_list == s) {
|
ax25_route_list = s->next;
|
ax25_route_list = s->next;
|
if (s->digipeat != NULL)
|
if (s->digipeat != NULL)
|
kfree(s->digipeat);
|
kfree(s->digipeat);
|
kfree(s);
|
kfree(s);
|
} else {
|
} else {
|
for (t = ax25_route_list; t != NULL; t = t->next) {
|
for (t = ax25_route_list; t != NULL; t = t->next) {
|
if (t->next == s) {
|
if (t->next == s) {
|
t->next = s->next;
|
t->next = s->next;
|
if (s->digipeat != NULL)
|
if (s->digipeat != NULL)
|
kfree(s->digipeat);
|
kfree(s->digipeat);
|
kfree(s);
|
kfree(s);
|
break;
|
break;
|
}
|
}
|
}
|
}
|
}
|
}
|
}
|
}
|
}
|
}
|
}
|
}
|
|
|
int ax25_rt_ioctl(unsigned int cmd, void *arg)
|
int ax25_rt_ioctl(unsigned int cmd, void *arg)
|
{
|
{
|
unsigned long flags;
|
unsigned long flags;
|
ax25_route *s, *t, *ax25_rt;
|
ax25_route *s, *t, *ax25_rt;
|
struct ax25_routes_struct route;
|
struct ax25_routes_struct route;
|
struct ax25_route_opt_struct rt_option;
|
struct ax25_route_opt_struct rt_option;
|
ax25_dev *ax25_dev;
|
ax25_dev *ax25_dev;
|
int i;
|
int i;
|
|
|
switch (cmd) {
|
switch (cmd) {
|
case SIOCADDRT:
|
case SIOCADDRT:
|
if (copy_from_user(&route, arg, sizeof(route)))
|
if (copy_from_user(&route, arg, sizeof(route)))
|
return -EFAULT;
|
return -EFAULT;
|
if ((ax25_dev = ax25_addr_ax25dev(&route.port_addr)) == NULL)
|
if ((ax25_dev = ax25_addr_ax25dev(&route.port_addr)) == NULL)
|
return -EINVAL;
|
return -EINVAL;
|
if (route.digi_count > AX25_MAX_DIGIS)
|
if (route.digi_count > AX25_MAX_DIGIS)
|
return -EINVAL;
|
return -EINVAL;
|
for (ax25_rt = ax25_route_list; ax25_rt != NULL; ax25_rt = ax25_rt->next) {
|
for (ax25_rt = ax25_route_list; ax25_rt != NULL; ax25_rt = ax25_rt->next) {
|
if (ax25cmp(&ax25_rt->callsign, &route.dest_addr) == 0 && ax25_rt->dev == ax25_dev->dev) {
|
if (ax25cmp(&ax25_rt->callsign, &route.dest_addr) == 0 && ax25_rt->dev == ax25_dev->dev) {
|
if (ax25_rt->digipeat != NULL) {
|
if (ax25_rt->digipeat != NULL) {
|
kfree(ax25_rt->digipeat);
|
kfree(ax25_rt->digipeat);
|
ax25_rt->digipeat = NULL;
|
ax25_rt->digipeat = NULL;
|
}
|
}
|
if (route.digi_count != 0) {
|
if (route.digi_count != 0) {
|
if ((ax25_rt->digipeat = kmalloc(sizeof(ax25_digi), GFP_ATOMIC)) == NULL)
|
if ((ax25_rt->digipeat = kmalloc(sizeof(ax25_digi), GFP_ATOMIC)) == NULL)
|
return -ENOMEM;
|
return -ENOMEM;
|
ax25_rt->digipeat->lastrepeat = -1;
|
ax25_rt->digipeat->lastrepeat = -1;
|
ax25_rt->digipeat->ndigi = route.digi_count;
|
ax25_rt->digipeat->ndigi = route.digi_count;
|
for (i = 0; i < route.digi_count; i++) {
|
for (i = 0; i < route.digi_count; i++) {
|
ax25_rt->digipeat->repeated[i] = 0;
|
ax25_rt->digipeat->repeated[i] = 0;
|
ax25_rt->digipeat->calls[i] = route.digi_addr[i];
|
ax25_rt->digipeat->calls[i] = route.digi_addr[i];
|
}
|
}
|
}
|
}
|
return 0;
|
return 0;
|
}
|
}
|
}
|
}
|
if ((ax25_rt = kmalloc(sizeof(ax25_route), GFP_ATOMIC)) == NULL)
|
if ((ax25_rt = kmalloc(sizeof(ax25_route), GFP_ATOMIC)) == NULL)
|
return -ENOMEM;
|
return -ENOMEM;
|
ax25_rt->callsign = route.dest_addr;
|
ax25_rt->callsign = route.dest_addr;
|
ax25_rt->dev = ax25_dev->dev;
|
ax25_rt->dev = ax25_dev->dev;
|
ax25_rt->digipeat = NULL;
|
ax25_rt->digipeat = NULL;
|
ax25_rt->ip_mode = ' ';
|
ax25_rt->ip_mode = ' ';
|
if (route.digi_count != 0) {
|
if (route.digi_count != 0) {
|
if ((ax25_rt->digipeat = kmalloc(sizeof(ax25_digi), GFP_ATOMIC)) == NULL) {
|
if ((ax25_rt->digipeat = kmalloc(sizeof(ax25_digi), GFP_ATOMIC)) == NULL) {
|
kfree(ax25_rt);
|
kfree(ax25_rt);
|
return -ENOMEM;
|
return -ENOMEM;
|
}
|
}
|
ax25_rt->digipeat->lastrepeat = -1;
|
ax25_rt->digipeat->lastrepeat = -1;
|
ax25_rt->digipeat->ndigi = route.digi_count;
|
ax25_rt->digipeat->ndigi = route.digi_count;
|
for (i = 0; i < route.digi_count; i++) {
|
for (i = 0; i < route.digi_count; i++) {
|
ax25_rt->digipeat->repeated[i] = 0;
|
ax25_rt->digipeat->repeated[i] = 0;
|
ax25_rt->digipeat->calls[i] = route.digi_addr[i];
|
ax25_rt->digipeat->calls[i] = route.digi_addr[i];
|
}
|
}
|
}
|
}
|
save_flags(flags); cli();
|
save_flags(flags); cli();
|
ax25_rt->next = ax25_route_list;
|
ax25_rt->next = ax25_route_list;
|
ax25_route_list = ax25_rt;
|
ax25_route_list = ax25_rt;
|
restore_flags(flags);
|
restore_flags(flags);
|
break;
|
break;
|
|
|
case SIOCDELRT:
|
case SIOCDELRT:
|
if (copy_from_user(&route, arg, sizeof(route)))
|
if (copy_from_user(&route, arg, sizeof(route)))
|
return -EFAULT;
|
return -EFAULT;
|
if ((ax25_dev = ax25_addr_ax25dev(&route.port_addr)) == NULL)
|
if ((ax25_dev = ax25_addr_ax25dev(&route.port_addr)) == NULL)
|
return -EINVAL;
|
return -EINVAL;
|
ax25_rt = ax25_route_list;
|
ax25_rt = ax25_route_list;
|
while (ax25_rt != NULL) {
|
while (ax25_rt != NULL) {
|
s = ax25_rt;
|
s = ax25_rt;
|
ax25_rt = ax25_rt->next;
|
ax25_rt = ax25_rt->next;
|
if (s->dev == ax25_dev->dev && ax25cmp(&route.dest_addr, &s->callsign) == 0) {
|
if (s->dev == ax25_dev->dev && ax25cmp(&route.dest_addr, &s->callsign) == 0) {
|
if (ax25_route_list == s) {
|
if (ax25_route_list == s) {
|
ax25_route_list = s->next;
|
ax25_route_list = s->next;
|
if (s->digipeat != NULL)
|
if (s->digipeat != NULL)
|
kfree(s->digipeat);
|
kfree(s->digipeat);
|
kfree(s);
|
kfree(s);
|
} else {
|
} else {
|
for (t = ax25_route_list; t != NULL; t = t->next) {
|
for (t = ax25_route_list; t != NULL; t = t->next) {
|
if (t->next == s) {
|
if (t->next == s) {
|
t->next = s->next;
|
t->next = s->next;
|
if (s->digipeat != NULL)
|
if (s->digipeat != NULL)
|
kfree(s->digipeat);
|
kfree(s->digipeat);
|
kfree(s);
|
kfree(s);
|
break;
|
break;
|
}
|
}
|
}
|
}
|
}
|
}
|
}
|
}
|
}
|
}
|
break;
|
break;
|
|
|
case SIOCAX25OPTRT:
|
case SIOCAX25OPTRT:
|
if (copy_from_user(&rt_option, arg, sizeof(rt_option)))
|
if (copy_from_user(&rt_option, arg, sizeof(rt_option)))
|
return -EFAULT;
|
return -EFAULT;
|
if ((ax25_dev = ax25_addr_ax25dev(&rt_option.port_addr)) == NULL)
|
if ((ax25_dev = ax25_addr_ax25dev(&rt_option.port_addr)) == NULL)
|
return -EINVAL;
|
return -EINVAL;
|
for (ax25_rt = ax25_route_list; ax25_rt != NULL; ax25_rt = ax25_rt->next) {
|
for (ax25_rt = ax25_route_list; ax25_rt != NULL; ax25_rt = ax25_rt->next) {
|
if (ax25_rt->dev == ax25_dev->dev && ax25cmp(&rt_option.dest_addr, &ax25_rt->callsign) == 0) {
|
if (ax25_rt->dev == ax25_dev->dev && ax25cmp(&rt_option.dest_addr, &ax25_rt->callsign) == 0) {
|
switch (rt_option.cmd) {
|
switch (rt_option.cmd) {
|
case AX25_SET_RT_IPMODE:
|
case AX25_SET_RT_IPMODE:
|
switch (rt_option.arg) {
|
switch (rt_option.arg) {
|
case ' ':
|
case ' ':
|
case 'D':
|
case 'D':
|
case 'V':
|
case 'V':
|
ax25_rt->ip_mode = rt_option.arg;
|
ax25_rt->ip_mode = rt_option.arg;
|
break;
|
break;
|
default:
|
default:
|
return -EINVAL;
|
return -EINVAL;
|
}
|
}
|
break;
|
break;
|
default:
|
default:
|
return -EINVAL;
|
return -EINVAL;
|
}
|
}
|
}
|
}
|
}
|
}
|
break;
|
break;
|
|
|
default:
|
default:
|
return -EINVAL;
|
return -EINVAL;
|
}
|
}
|
|
|
return 0;
|
return 0;
|
}
|
}
|
|
|
int ax25_rt_get_info(char *buffer, char **start, off_t offset, int length)
|
int ax25_rt_get_info(char *buffer, char **start, off_t offset, int length)
|
{
|
{
|
ax25_route *ax25_rt;
|
ax25_route *ax25_rt;
|
int len = 0;
|
int len = 0;
|
off_t pos = 0;
|
off_t pos = 0;
|
off_t begin = 0;
|
off_t begin = 0;
|
char *callsign;
|
char *callsign;
|
int i;
|
int i;
|
|
|
cli();
|
cli();
|
|
|
len += sprintf(buffer, "callsign dev mode digipeaters\n");
|
len += sprintf(buffer, "callsign dev mode digipeaters\n");
|
|
|
for (ax25_rt = ax25_route_list; ax25_rt != NULL; ax25_rt = ax25_rt->next) {
|
for (ax25_rt = ax25_route_list; ax25_rt != NULL; ax25_rt = ax25_rt->next) {
|
if (ax25cmp(&ax25_rt->callsign, &null_ax25_address) == 0)
|
if (ax25cmp(&ax25_rt->callsign, &null_ax25_address) == 0)
|
callsign = "default";
|
callsign = "default";
|
else
|
else
|
callsign = ax2asc(&ax25_rt->callsign);
|
callsign = ax2asc(&ax25_rt->callsign);
|
len += sprintf(buffer + len, "%-9s %-4s",
|
len += sprintf(buffer + len, "%-9s %-4s",
|
callsign,
|
callsign,
|
ax25_rt->dev ? ax25_rt->dev->name : "???");
|
ax25_rt->dev ? ax25_rt->dev->name : "???");
|
|
|
switch (ax25_rt->ip_mode) {
|
switch (ax25_rt->ip_mode) {
|
case 'V':
|
case 'V':
|
len += sprintf(buffer + len, " vc");
|
len += sprintf(buffer + len, " vc");
|
break;
|
break;
|
case 'D':
|
case 'D':
|
len += sprintf(buffer + len, " dg");
|
len += sprintf(buffer + len, " dg");
|
break;
|
break;
|
default:
|
default:
|
len += sprintf(buffer + len, " *");
|
len += sprintf(buffer + len, " *");
|
break;
|
break;
|
}
|
}
|
|
|
if (ax25_rt->digipeat != NULL)
|
if (ax25_rt->digipeat != NULL)
|
for (i = 0; i < ax25_rt->digipeat->ndigi; i++)
|
for (i = 0; i < ax25_rt->digipeat->ndigi; i++)
|
len += sprintf(buffer + len, " %s", ax2asc(&ax25_rt->digipeat->calls[i]));
|
len += sprintf(buffer + len, " %s", ax2asc(&ax25_rt->digipeat->calls[i]));
|
|
|
len += sprintf(buffer + len, "\n");
|
len += sprintf(buffer + len, "\n");
|
|
|
pos = begin + len;
|
pos = begin + len;
|
|
|
if (pos < offset) {
|
if (pos < offset) {
|
len = 0;
|
len = 0;
|
begin = pos;
|
begin = pos;
|
}
|
}
|
|
|
if (pos > offset + length)
|
if (pos > offset + length)
|
break;
|
break;
|
}
|
}
|
|
|
sti();
|
sti();
|
|
|
*start = buffer + (offset - begin);
|
*start = buffer + (offset - begin);
|
len -= (offset - begin);
|
len -= (offset - begin);
|
|
|
if (len > length) len = length;
|
if (len > length) len = length;
|
|
|
return len;
|
return len;
|
}
|
}
|
|
|
/*
|
/*
|
* Find AX.25 route
|
* Find AX.25 route
|
*/
|
*/
|
static ax25_route *ax25_find_route(ax25_address *addr, struct net_device *dev)
|
static ax25_route *ax25_find_route(ax25_address *addr, struct net_device *dev)
|
{
|
{
|
ax25_route *ax25_spe_rt = NULL;
|
ax25_route *ax25_spe_rt = NULL;
|
ax25_route *ax25_def_rt = NULL;
|
ax25_route *ax25_def_rt = NULL;
|
ax25_route *ax25_rt;
|
ax25_route *ax25_rt;
|
|
|
/*
|
/*
|
* Bind to the physical interface we heard them on, or the default
|
* Bind to the physical interface we heard them on, or the default
|
* route if none is found;
|
* route if none is found;
|
*/
|
*/
|
for (ax25_rt = ax25_route_list; ax25_rt != NULL; ax25_rt = ax25_rt->next) {
|
for (ax25_rt = ax25_route_list; ax25_rt != NULL; ax25_rt = ax25_rt->next) {
|
if (dev == NULL) {
|
if (dev == NULL) {
|
if (ax25cmp(&ax25_rt->callsign, addr) == 0 && ax25_rt->dev != NULL)
|
if (ax25cmp(&ax25_rt->callsign, addr) == 0 && ax25_rt->dev != NULL)
|
ax25_spe_rt = ax25_rt;
|
ax25_spe_rt = ax25_rt;
|
if (ax25cmp(&ax25_rt->callsign, &null_ax25_address) == 0 && ax25_rt->dev != NULL)
|
if (ax25cmp(&ax25_rt->callsign, &null_ax25_address) == 0 && ax25_rt->dev != NULL)
|
ax25_def_rt = ax25_rt;
|
ax25_def_rt = ax25_rt;
|
} else {
|
} else {
|
if (ax25cmp(&ax25_rt->callsign, addr) == 0 && ax25_rt->dev == dev)
|
if (ax25cmp(&ax25_rt->callsign, addr) == 0 && ax25_rt->dev == dev)
|
ax25_spe_rt = ax25_rt;
|
ax25_spe_rt = ax25_rt;
|
if (ax25cmp(&ax25_rt->callsign, &null_ax25_address) == 0 && ax25_rt->dev == dev)
|
if (ax25cmp(&ax25_rt->callsign, &null_ax25_address) == 0 && ax25_rt->dev == dev)
|
ax25_def_rt = ax25_rt;
|
ax25_def_rt = ax25_rt;
|
}
|
}
|
}
|
}
|
|
|
if (ax25_spe_rt != NULL)
|
if (ax25_spe_rt != NULL)
|
return ax25_spe_rt;
|
return ax25_spe_rt;
|
|
|
return ax25_def_rt;
|
return ax25_def_rt;
|
}
|
}
|
|
|
/*
|
/*
|
* Adjust path: If you specify a default route and want to connect
|
* Adjust path: If you specify a default route and want to connect
|
* a target on the digipeater path but w/o having a special route
|
* a target on the digipeater path but w/o having a special route
|
* set before, the path has to be truncated from your target on.
|
* set before, the path has to be truncated from your target on.
|
*/
|
*/
|
static inline void ax25_adjust_path(ax25_address *addr, ax25_digi *digipeat)
|
static inline void ax25_adjust_path(ax25_address *addr, ax25_digi *digipeat)
|
{
|
{
|
int k;
|
int k;
|
|
|
for (k = 0; k < digipeat->ndigi; k++) {
|
for (k = 0; k < digipeat->ndigi; k++) {
|
if (ax25cmp(addr, &digipeat->calls[k]) == 0)
|
if (ax25cmp(addr, &digipeat->calls[k]) == 0)
|
break;
|
break;
|
}
|
}
|
|
|
digipeat->ndigi = k;
|
digipeat->ndigi = k;
|
}
|
}
|
|
|
|
|
/*
|
/*
|
* Find which interface to use.
|
* Find which interface to use.
|
*/
|
*/
|
int ax25_rt_autobind(ax25_cb *ax25, ax25_address *addr)
|
int ax25_rt_autobind(ax25_cb *ax25, ax25_address *addr)
|
{
|
{
|
ax25_route *ax25_rt;
|
ax25_route *ax25_rt;
|
ax25_address *call;
|
ax25_address *call;
|
|
|
if ((ax25_rt = ax25_find_route(addr, NULL)) == NULL)
|
if ((ax25_rt = ax25_find_route(addr, NULL)) == NULL)
|
return -EHOSTUNREACH;
|
return -EHOSTUNREACH;
|
|
|
if ((ax25->ax25_dev = ax25_dev_ax25dev(ax25_rt->dev)) == NULL)
|
if ((ax25->ax25_dev = ax25_dev_ax25dev(ax25_rt->dev)) == NULL)
|
return -EHOSTUNREACH;
|
return -EHOSTUNREACH;
|
|
|
if ((call = ax25_findbyuid(current->euid)) == NULL) {
|
if ((call = ax25_findbyuid(current->euid)) == NULL) {
|
if (ax25_uid_policy && !capable(CAP_NET_BIND_SERVICE))
|
if (ax25_uid_policy && !capable(CAP_NET_BIND_SERVICE))
|
return -EPERM;
|
return -EPERM;
|
call = (ax25_address *)ax25->ax25_dev->dev->dev_addr;
|
call = (ax25_address *)ax25->ax25_dev->dev->dev_addr;
|
}
|
}
|
|
|
ax25->source_addr = *call;
|
ax25->source_addr = *call;
|
|
|
if (ax25_rt->digipeat != NULL) {
|
if (ax25_rt->digipeat != NULL) {
|
if ((ax25->digipeat = kmalloc(sizeof(ax25_digi), GFP_ATOMIC)) == NULL)
|
if ((ax25->digipeat = kmalloc(sizeof(ax25_digi), GFP_ATOMIC)) == NULL)
|
return -ENOMEM;
|
return -ENOMEM;
|
memcpy(ax25->digipeat, ax25_rt->digipeat, sizeof(ax25_digi));
|
memcpy(ax25->digipeat, ax25_rt->digipeat, sizeof(ax25_digi));
|
ax25_adjust_path(addr, ax25->digipeat);
|
ax25_adjust_path(addr, ax25->digipeat);
|
}
|
}
|
|
|
if (ax25->sk != NULL)
|
if (ax25->sk != NULL)
|
ax25->sk->zapped = 0;
|
ax25->sk->zapped = 0;
|
|
|
return 0;
|
return 0;
|
}
|
}
|
|
|
/*
|
/*
|
* dl1bke 960117: build digipeater path
|
* dl1bke 960117: build digipeater path
|
* dl1bke 960301: use the default route if it exists
|
* dl1bke 960301: use the default route if it exists
|
*/
|
*/
|
ax25_route *ax25_rt_find_route(ax25_address *addr, struct net_device *dev)
|
ax25_route *ax25_rt_find_route(ax25_address *addr, struct net_device *dev)
|
{
|
{
|
static ax25_route route;
|
static ax25_route route;
|
ax25_route *ax25_rt;
|
ax25_route *ax25_rt;
|
|
|
if ((ax25_rt = ax25_find_route(addr, dev)) == NULL) {
|
if ((ax25_rt = ax25_find_route(addr, dev)) == NULL) {
|
route.next = NULL;
|
route.next = NULL;
|
route.callsign = *addr;
|
route.callsign = *addr;
|
route.dev = dev;
|
route.dev = dev;
|
route.digipeat = NULL;
|
route.digipeat = NULL;
|
route.ip_mode = ' ';
|
route.ip_mode = ' ';
|
return &route;
|
return &route;
|
}
|
}
|
|
|
return ax25_rt;
|
return ax25_rt;
|
}
|
}
|
|
|
struct sk_buff *ax25_rt_build_path(struct sk_buff *skb, ax25_address *src, ax25_address *dest, ax25_digi *digi)
|
struct sk_buff *ax25_rt_build_path(struct sk_buff *skb, ax25_address *src, ax25_address *dest, ax25_digi *digi)
|
{
|
{
|
struct sk_buff *skbn;
|
struct sk_buff *skbn;
|
unsigned char *bp;
|
unsigned char *bp;
|
int len;
|
int len;
|
|
|
len = digi->ndigi * AX25_ADDR_LEN;
|
len = digi->ndigi * AX25_ADDR_LEN;
|
|
|
if (skb_headroom(skb) < len) {
|
if (skb_headroom(skb) < len) {
|
if ((skbn = skb_realloc_headroom(skb, len)) == NULL) {
|
if ((skbn = skb_realloc_headroom(skb, len)) == NULL) {
|
printk(KERN_CRIT "AX.25: ax25_dg_build_path - out of memory\n");
|
printk(KERN_CRIT "AX.25: ax25_dg_build_path - out of memory\n");
|
return NULL;
|
return NULL;
|
}
|
}
|
|
|
if (skb->sk != NULL)
|
if (skb->sk != NULL)
|
skb_set_owner_w(skbn, skb->sk);
|
skb_set_owner_w(skbn, skb->sk);
|
|
|
kfree_skb(skb);
|
kfree_skb(skb);
|
|
|
skb = skbn;
|
skb = skbn;
|
}
|
}
|
|
|
bp = skb_push(skb, len);
|
bp = skb_push(skb, len);
|
|
|
ax25_addr_build(bp, src, dest, digi, AX25_COMMAND, AX25_MODULUS);
|
ax25_addr_build(bp, src, dest, digi, AX25_COMMAND, AX25_MODULUS);
|
|
|
return skb;
|
return skb;
|
}
|
}
|
|
|
/*
|
/*
|
* Free all memory associated with routing structures.
|
* Free all memory associated with routing structures.
|
*/
|
*/
|
void __exit ax25_rt_free(void)
|
void __exit ax25_rt_free(void)
|
{
|
{
|
ax25_route *s, *ax25_rt = ax25_route_list;
|
ax25_route *s, *ax25_rt = ax25_route_list;
|
|
|
while (ax25_rt != NULL) {
|
while (ax25_rt != NULL) {
|
s = ax25_rt;
|
s = ax25_rt;
|
ax25_rt = ax25_rt->next;
|
ax25_rt = ax25_rt->next;
|
|
|
if (s->digipeat != NULL)
|
if (s->digipeat != NULL)
|
kfree(s->digipeat);
|
kfree(s->digipeat);
|
|
|
kfree(s);
|
kfree(s);
|
}
|
}
|
}
|
}
|
|
|
