trivial: remove needless "delay_req_hdr" field

This field is not needed, because we issue the response immediately,
using the last received header. The copy is not needed, nor the field.

Signed-off-by: Alessandro Rubini <rubini@gnudd.com>

include/ppsi/pp-instance.h

@@ -182,7 +182,6 @@ struct pp_instance {
 
 	UInteger16 sent_seq[__PP_NR_MESSAGES_TYPES]; /* last sent this type */
 	MsgHeader received_ptp_header;
-	MsgHeader delay_req_hdr;
 	char *iface_name; /* for direct actions on hardware */
 	char *port_name; /* for diagnostics, mainly */
 	int port_idx;

proto-ext-whiterabbit/hooks.c

@@ -80,9 +80,8 @@ static int wr_master_msg(struct pp_instance *ppi, unsigned char *pkt, int plen,
 
 	/* This case is modified from the default one */
 	case PPM_DELAY_REQ:
-		msg_copy_header(&ppi->delay_req_hdr, hdr);
-		ppi->delay_req_hdr.correctionfield.msb = 0;
-		ppi->delay_req_hdr.correctionfield.lsb =
+		hdr->correctionfield.msb = 0;
+		hdr->correctionfield.lsb =
 			phase_to_cf_units(ppi->last_rcv_time.phase);
 		msg_issue_delay_resp(ppi, time);
 		msgtype = PPM_NOTHING_TO_DO;

proto-standard/msg.c

@@ -398,7 +398,7 @@ int msg_issue_delay_resp(struct pp_instance *ppi, TimeInternal *time)
 	Timestamp rcv_tstamp;
 	from_TimeInternal(time, &rcv_tstamp);
 
-	msg_pack_delay_resp(ppi, &ppi->delay_req_hdr, &rcv_tstamp);
+	msg_pack_delay_resp(ppi, &ppi->received_ptp_header, &rcv_tstamp);
 
 	return __send_and_log(ppi, PP_DELAY_RESP_LENGTH, PPM_DELAY_RESP,
 			      PP_NP_GEN);

proto-standard/state-master.c

@@ -71,8 +71,6 @@ int pp_master(struct pp_instance *ppi, unsigned char *pkt, int plen)
 		break;
 
 	case PPM_DELAY_REQ:
-		msg_copy_header(&ppi->delay_req_hdr,
-				&ppi->received_ptp_header);
 		msg_issue_delay_resp(ppi, &ppi->last_rcv_time);
 		break;