patch-2.0.30 linux/net/ipv4/sysctl_net_ipv4.c

• Lines: 44
• Date: Tue Apr 8 08:47:47 1997
• Orig file: v2.0.29/linux/net/ipv4/sysctl_net_ipv4.c
• Orig date: Mon Jun 3 04:07:09 1996

diff -u --recursive --new-file v2.0.29/linux/net/ipv4/sysctl_net_ipv4.c linux/net/ipv4/sysctl_net_ipv4.c
@@ -7,6 +7,7 @@
 
 #include <linux/mm.h>
 #include <linux/sysctl.h>
+#include <net/ip.h>
 
 /* From arp.c */
 extern int sysctl_arp_res_time;
@@ -17,6 +18,27 @@
 extern int sysctl_arp_confirm_interval;
 extern int sysctl_arp_confirm_timeout;
 
+extern int sysctl_ip_forward; 
+static int proc_doipforward(ctl_table *ctl, int write, struct file *filp,
+			    void *buffer, size_t *lenp) 
+{
+    int val = sysctl_ip_forward;    
+    int retv;
+
+    retv = proc_dointvec(ctl, write, filp, buffer, lenp);
+    if (write) {
+	if (sysctl_ip_forward && !val) {
+	    printk(KERN_INFO "sysctl: ip forwarding enabled\n");
+	    ip_statistics.IpForwarding = 1; 
+	}
+	if (!sysctl_ip_forward && val) {
+	    printk(KERN_INFO "sysctl: ip forwarding off\n");
+	    ip_statistics.IpForwarding = 2;
+	}
+    }
+    return retv; 
+}
+
 ctl_table ipv4_table[] = {
         {NET_IPV4_ARP_RES_TIME, "arp_res_time",
          &sysctl_arp_res_time, sizeof(int), 0644, NULL, &proc_dointvec},
@@ -34,5 +56,7 @@
         {NET_IPV4_ARP_CONFIRM_TIMEOUT, "arp_confirm_timeout",
          &sysctl_arp_confirm_timeout, sizeof(int), 0644, NULL,
          &proc_dointvec},
+	{NET_IPV4_FORWARD, "ip_forward", &sysctl_ip_forward, sizeof(int),
+	 0644, NULL, &proc_doipforward },
 	{0}
 };