Remove ipv4 parameter from kernel_setup.

kernel.h

@@ -37,7 +37,7 @@ struct kernel_route {
 
 extern int export_table, import_table;
 
-int kernel_setup(int setup, int ipv4);
+int kernel_setup(int setup);
 int kernel_setup_socket(int setup);
 int kernel_setup_interface(int setup, const char *ifname, int ifindex);
 int kernel_interface_operational(const char *ifname, int ifindex);

kernel_netlink.c

@@ -388,7 +388,7 @@ netlink_send_dump(int type, void *data, int len) {
 }
 
 int
-kernel_setup(int setup, int ipv4)
+kernel_setup(int setup)
 {
     int rc;
 
@@ -422,19 +422,17 @@ kernel_setup(int setup, int ipv4)
             return -1;
         }
 
-        if(ipv4) {
-            old_ipv4_forwarding =
-                read_proc("/proc/sys/net/ipv4/conf/all/forwarding");
-            if(old_ipv4_forwarding < 0) {
-                perror("Couldn't read IPv4 forwarding knob.");
-                return -1;
-            }
+        old_ipv4_forwarding =
+            read_proc("/proc/sys/net/ipv4/conf/all/forwarding");
+        if(old_ipv4_forwarding < 0) {
+            perror("Couldn't read IPv4 forwarding knob.");
+            return -1;
+        }
 
-            rc = write_proc("/proc/sys/net/ipv4/conf/all/forwarding", 1);
-            if(rc < 0) {
-                perror("Couldn't write IPv4 forwarding knob.");
-                return -1;
-            }
+        rc = write_proc("/proc/sys/net/ipv4/conf/all/forwarding", 1);
+        if(rc < 0) {
+            perror("Couldn't write IPv4 forwarding knob.");
+            return -1;
         }
 
 

kernel_socket.c

@@ -138,7 +138,7 @@ plen2mask(int n, struct in6_addr *dest)
 }
 
 int
-kernel_setup(int setup, int ipv4)
+kernel_setup(int setup)
 {
     int rc;
     if(setup) {