_stp_dump
_stp_dump ("\nall BPDU", ((unsigned char*) bpdu) - 12, len + 12);
_stp_dump ("ETH_HEADER", (unsigned char*) &bpdu->eth, 5);
_stp_dump ("BPDU_HEADER", (unsigned char*) &bpdu->hdr, 4);
_stp_dump ("\nBPDU_BODY", (unsigned char*) &bpdu->body, sizeof (BPDU_BODY_T) + 2);
_stp_dump ("root_id", bpdu->body.root_id, 8);
_stp_dump ("root_path_cost", bpdu->body.root_path_cost, 4);
_stp_dump ("bridge_id", bpdu->body.bridge_id, 8);
_stp_dump ("port_id", bpdu->body.port_id, 2);
_stp_dump ("message_age", bpdu->body.message_age, 2);
_stp_dump ("max_age", bpdu->body.max_age, 2);
_stp_dump ("hello_time", bpdu->body.hello_time, 2);
_stp_dump ("forward_delay", bpdu->body.forward_delay, 2);
_stp_dump ("ver_1_len", bpdu->ver_1_len, 2);