linuxptp/port_signaling.c

47 lines
1.7 KiB
C

/**
* @file port_signaling.c
* @brief Implements signaling messages
* @note Copyright (C) 2018 Richard Cochran <richardcochran@gmail.com>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License along
* with this program; if not, write to the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1335 USA.
*/
#include "port_private.h"
struct ptp_message *port_signaling_construct(struct port *p,
struct address *address,
struct PortIdentity *tpid)
{
struct ptp_message *msg;
msg = msg_allocate();
if (!msg) {
return NULL;
}
msg->hwts.type = p->timestamping;
msg->header.tsmt = SIGNALING | p->transportSpecific;
msg->header.ver = PTP_VERSION;
msg->header.messageLength = sizeof(struct signaling_msg);
msg->header.domainNumber = clock_domain_number(p->clock);
msg->header.sourcePortIdentity = p->portIdentity;
msg->header.sequenceId = p->seqnum.signaling++;
msg->header.control = CTL_OTHER;
msg->header.logMessageInterval = 0x7F;
msg->signaling.targetPortIdentity = *tpid;
msg->header.flagField[0] |= UNICAST;
msg->address = *address;
return msg;
}