void cdp_keepalive (cdp_main_t * cm, cdp_neighbor_t * n);
u16 cdp_checksum (void *p, int count);
u8 *cdp_input_format_trace (u8 * s, va_list * args);
void cdp_keepalive (cdp_main_t * cm, cdp_neighbor_t * n);
u16 cdp_checksum (void *p, int count);
u8 *cdp_input_format_trace (u8 * s, va_list * args);