for splay_each(node_t, n, node_tree) {
for splay_each(edge_t, e, n->edge_tree) {
char *address = sockaddr2hostname(&e->address);
for splay_each(node_t, n, node_tree) {
for splay_each(edge_t, e, n->edge_tree) {
char *address = sockaddr2hostname(&e->address);