-struct label_manager_chunk *assign_label_chunk(u_char proto, u_short instance,
- u_char keep, uint32_t size);
-int release_label_chunk(u_char proto, u_short instance, uint32_t start,
+struct label_manager_chunk *assign_label_chunk(uint8_t proto,
+ unsigned short instance,
+ uint8_t keep, uint32_t size);
+int release_label_chunk(uint8_t proto, unsigned short instance, uint32_t start,