bool system_resolve_rt_table(const char *name, unsigned int *id);
bool system_is_default_rt_table(unsigned int id);
bool system_resolve_rpfilter(const char *filter, unsigned int *id);
+bool system_resolve_igmpversion(const unsigned int version, unsigned int *id);
int system_del_ip_tunnel(const char *name, struct blob_attr *attr);
int system_add_ip_tunnel(const char *name, struct blob_attr *attr);