extern int aspath_confed_check (struct aspath *);
extern int aspath_left_confed_check (struct aspath *);
extern unsigned long aspath_count (void);
-extern unsigned int aspath_count_hops (struct aspath *);
+extern unsigned int aspath_count_hops (const struct aspath *);
extern unsigned int aspath_count_confeds (struct aspath *);
extern unsigned int aspath_size (struct aspath *);
extern as_t aspath_highest (struct aspath *);