}
}
-address_t *address_dup(address_t *addr)
+address_t *address_dup(const address_t *addr)
{
address_t *res = address_new();
return res;
}
-address_t *address_list_dup(address_t *addr)
+address_t *address_list_dup(const address_t *addr)
{
address_t *res = NULL, **resp = &res;