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authorRalf Baechle DL5RB <ralf@linux-mips.org>2006-07-04 06:30:18 +0400
committerDavid S. Miller <davem@davemloft.net>2006-07-04 06:30:18 +0400
commit006f68b84fe19fc5015a8cf838a10d75f91f0218 (patch)
tree2c9377778e4e09bb8d10084341207ba1352f600a /net/ax25/ax25_ip.c
parent8dc22d2b642f8a6f14ef8878777a05311e5d1d7e (diff)
downloadlinux-006f68b84fe19fc5015a8cf838a10d75f91f0218.tar.xz
[AX.25]: Reference counting for AX.25 routes.
In the past routes could be freed even though the were possibly in use ... Signed-off-by: Ralf Baechle DL5RB <ralf@linux-mips.org> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/ax25/ax25_ip.c')
-rw-r--r--net/ax25/ax25_ip.c23
1 files changed, 15 insertions, 8 deletions
diff --git a/net/ax25/ax25_ip.c b/net/ax25/ax25_ip.c
index 9be5c15e63d3..136c3aefa9de 100644
--- a/net/ax25/ax25_ip.c
+++ b/net/ax25/ax25_ip.c
@@ -103,11 +103,13 @@ int ax25_rebuild_header(struct sk_buff *skb)
{
struct sk_buff *ourskb;
unsigned char *bp = skb->data;
- struct net_device *dev;
+ ax25_route *route;
+ struct net_device *dev = NULL;
ax25_address *src, *dst;
+ ax25_digi *digipeat = NULL;
ax25_dev *ax25_dev;
- ax25_route _route, *route = &_route;
ax25_cb *ax25;
+ char ip_mode = ' ';
dst = (ax25_address *)(bp + 1);
src = (ax25_address *)(bp + 8);
@@ -115,8 +117,12 @@ int ax25_rebuild_header(struct sk_buff *skb)
if (arp_find(bp + 1, skb))
return 1;
- route = ax25_rt_find_route(route, dst, NULL);
- dev = route->dev;
+ route = ax25_get_route(dst, NULL);
+ if (route) {
+ digipeat = route->digipeat;
+ dev = route->dev;
+ ip_mode = route->ip_mode;
+ };
if (dev == NULL)
dev = skb->dev;
@@ -126,7 +132,7 @@ int ax25_rebuild_header(struct sk_buff *skb)
}
if (bp[16] == AX25_P_IP) {
- if (route->ip_mode == 'V' || (route->ip_mode == ' ' && ax25_dev->values[AX25_VALUES_IPDEFMODE])) {
+ if (ip_mode == 'V' || (ip_mode == ' ' && ax25_dev->values[AX25_VALUES_IPDEFMODE])) {
/*
* We copy the buffer and release the original thereby
* keeping it straight
@@ -172,7 +178,7 @@ int ax25_rebuild_header(struct sk_buff *skb)
ourskb,
ax25_dev->values[AX25_VALUES_PACLEN],
&src_c,
- &dst_c, route->digipeat, dev);
+ &dst_c, digipeat, dev);
if (ax25) {
ax25_cb_put(ax25);
}
@@ -190,7 +196,7 @@ int ax25_rebuild_header(struct sk_buff *skb)
skb_pull(skb, AX25_KISS_HEADER_LEN);
- if (route->digipeat != NULL) {
+ if (digipeat != NULL) {
if ((ourskb = ax25_rt_build_path(skb, src, dst, route->digipeat)) == NULL) {
kfree_skb(skb);
goto put;
@@ -202,7 +208,8 @@ int ax25_rebuild_header(struct sk_buff *skb)
ax25_queue_xmit(skb, dev);
put:
- ax25_put_route(route);
+ if (route)
+ ax25_put_route(route);
return 1;
}