1extern int print_linkinfo(const struct sockaddr_nl *who, 2 struct nlmsghdr *n, 3 void *arg); 4extern int print_addrinfo(const struct sockaddr_nl *who, 5 struct nlmsghdr *n, 6 void *arg); 7extern int print_neigh(const struct sockaddr_nl *who, 8 struct nlmsghdr *n, void *arg); 9extern int ipaddr_list(int argc, char **argv); 10extern int ipaddr_list_link(int argc, char **argv); 11extern int iproute_monitor(int argc, char **argv); 12extern void iplink_usage(void) __attribute__((noreturn)); 13extern void iproute_reset_filter(void); 14extern void ipaddr_reset_filter(int); 15extern void ipneigh_reset_filter(void); 16extern int print_route(const struct sockaddr_nl *who, 17 struct nlmsghdr *n, void *arg); 18extern int print_prefix(const struct sockaddr_nl *who, 19 struct nlmsghdr *n, void *arg); 20extern int do_ipaddr(int argc, char **argv); 21extern int do_iproute(int argc, char **argv); 22extern int do_iprule(int argc, char **argv); 23extern int do_ipneigh(int argc, char **argv); 24extern int do_iptunnel(int argc, char **argv); 25extern int do_iplink(int argc, char **argv); 26extern int do_ipmonitor(int argc, char **argv); 27extern int do_multiaddr(int argc, char **argv); 28extern int do_multiroute(int argc, char **argv); 29extern int do_xfrm(int argc, char **argv); 30 31extern struct rtnl_handle rth; 32