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Subject[PATCH 2/3] X.25: Adds /proc/sys/net/x25/x25_forward to control forwarding.
From
Date
echo "1" > /proc/sys/net/x25/x25_forward 
To turn on x25_forwarding, defaults to off
Requires the previous patch.
Signed-off-by: Andrew Hendry <andrew.hendry@gmail.com>


diff -uprN -X linux-2.6.20/Documentation/dontdiff linux-2.6.20-vanilla/include/linux/sysctl.h linux-2.6.20/include/linux/sysctl.h
--- linux-2.6.20-vanilla/include/linux/sysctl.h 2007-02-07 14:28:13.000000000 +1100
+++ linux-2.6.20/include/linux/sysctl.h 2007-02-07 15:01:20.000000000 +1100
@@ -699,7 +699,8 @@ enum {
NET_X25_CALL_REQUEST_TIMEOUT=2,
NET_X25_RESET_REQUEST_TIMEOUT=3,
NET_X25_CLEAR_REQUEST_TIMEOUT=4,
- NET_X25_ACK_HOLD_BACK_TIMEOUT=5
+ NET_X25_ACK_HOLD_BACK_TIMEOUT=5,
+ NET_X25_FORWARD=6
};

/* /proc/sys/net/token-ring */
diff -uprN -X linux-2.6.20/Documentation/dontdiff linux-2.6.20-vanilla/include/net/x25.h linux-2.6.20/include/net/x25.h
--- linux-2.6.20-vanilla/include/net/x25.h 2007-02-07 14:28:14.000000000 +1100
+++ linux-2.6.20/include/net/x25.h 2007-02-07 15:02:06.000000000 +1100
@@ -180,6 +180,7 @@ extern int sysctl_x25_call_request_time
extern int sysctl_x25_reset_request_timeout;
extern int sysctl_x25_clear_request_timeout;
extern int sysctl_x25_ack_holdback_timeout;
+extern int sysctl_x25_forward;

extern int x25_addr_ntoa(unsigned char *, struct x25_address *,
struct x25_address *);
diff -uprN -X linux-2.6.20/Documentation/dontdiff linux-2.6.20-vanilla/net/x25/af_x25.c linux-2.6.20/net/x25/af_x25.c
--- linux-2.6.20-vanilla/net/x25/af_x25.c 2007-02-07 14:29:43.000000000 +1100
+++ linux-2.6.20/net/x25/af_x25.c 2007-02-07 15:03:27.000000000 +1100
@@ -63,6 +63,7 @@ int sysctl_x25_call_request_timeout =
int sysctl_x25_reset_request_timeout = X25_DEFAULT_T22;
int sysctl_x25_clear_request_timeout = X25_DEFAULT_T23;
int sysctl_x25_ack_holdback_timeout = X25_DEFAULT_T2;
+int sysctl_x25_forward = 0;

HLIST_HEAD(x25_list);
DEFINE_RWLOCK(x25_list_lock);
@@ -884,7 +885,8 @@ int x25_rx_call_request(struct sk_buff *
*/
if (sk == NULL) {
skb_push(skb, addr_len + X25_STD_MIN_LEN);
- if (x25_forward_call(&dest_addr, nb, skb, lci) > 0)
+ if (sysctl_x25_forward &&
+ x25_forward_call(&dest_addr, nb, skb, lci) > 0)
{
/* Call was forwarded, dont process it any more */
kfree_skb(skb);
diff -uprN -X linux-2.6.20/Documentation/dontdiff linux-2.6.20-vanilla/net/x25/sysctl_net_x25.c linux-2.6.20/net/x25/sysctl_net_x25.c
--- linux-2.6.20-vanilla/net/x25/sysctl_net_x25.c 2007-02-07 14:29:43.000000000 +1100
+++ linux-2.6.20/net/x25/sysctl_net_x25.c 2007-02-07 15:03:58.000000000 +1100
@@ -73,6 +73,14 @@ static struct ctl_table x25_table[] = {
.extra1 = &min_timer,
.extra2 = &max_timer,
},
+ {
+ .ctl_name = NET_X25_FORWARD,
+ .procname = "x25_forward",
+ .data = &sysctl_x25_forward,
+ .maxlen = sizeof(int),
+ .mode = 0644,
+ .proc_handler = &proc_dointvec,
+ },
{ 0, },
};

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