115 lines
3.1 KiB
C
115 lines
3.1 KiB
C
/**
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* @file port_signaling.c
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* @brief Implements signaling messages
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* @note Copyright (C) 2018 Richard Cochran <richardcochran@gmail.com>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License along
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* with this program; if not, write to the Free Software Foundation, Inc.,
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* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1335 USA.
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*/
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#include "port_private.h"
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#include "unicast_client.h"
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#include "unicast_service.h"
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static struct PortIdentity wildcard = {
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.clockIdentity = {
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{0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff}
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},
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.portNumber = 0xffff,
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};
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struct ptp_message *port_signaling_construct(struct port *p,
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struct address *address,
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struct PortIdentity *tpid)
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{
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struct ptp_message *msg;
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msg = msg_allocate();
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if (!msg) {
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return NULL;
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}
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msg->hwts.type = p->timestamping;
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msg->header.tsmt = SIGNALING | p->transportSpecific;
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msg->header.ver = PTP_VERSION;
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msg->header.messageLength = sizeof(struct signaling_msg);
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msg->header.domainNumber = clock_domain_number(p->clock);
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msg->header.sourcePortIdentity = p->portIdentity;
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msg->header.sequenceId = p->seqnum.signaling++;
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msg->header.control = CTL_OTHER;
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msg->header.logMessageInterval = 0x7F;
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msg->signaling.targetPortIdentity = *tpid;
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msg->header.flagField[0] |= UNICAST;
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msg->address = *address;
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return msg;
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}
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int process_signaling(struct port *p, struct ptp_message *m)
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{
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struct tlv_extra *extra;
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int err = 0, result;
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switch (p->state) {
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case PS_INITIALIZING:
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case PS_FAULTY:
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case PS_DISABLED:
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return 0;
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case PS_LISTENING:
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case PS_PRE_MASTER:
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case PS_MASTER:
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case PS_GRAND_MASTER:
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case PS_PASSIVE:
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case PS_UNCALIBRATED:
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case PS_SLAVE:
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break;
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}
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/* Ignore signaling messages not addressed to this port. */
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if (!pid_eq(&m->signaling.targetPortIdentity, &p->portIdentity) &&
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!pid_eq(&m->signaling.targetPortIdentity, &wildcard)) {
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return 0;
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}
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TAILQ_FOREACH(extra, &m->tlv_list, list) {
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switch (extra->tlv->type) {
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case TLV_REQUEST_UNICAST_TRANSMISSION:
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result = unicast_service_add(p, m, extra);
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switch (result) {
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case SERVICE_GRANTED:
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err = unicast_service_grant(p, m, extra);
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break;
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case SERVICE_DENIED:
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err = unicast_service_deny(p, m, extra);
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break;
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case SERVICE_DISABLED:
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default:
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break;
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}
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break;
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case TLV_GRANT_UNICAST_TRANSMISSION:
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unicast_client_grant(p, m, extra);
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break;
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case TLV_CANCEL_UNICAST_TRANSMISSION:
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err = unicast_client_cancel(p, m, extra);
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unicast_service_remove(p, m, extra);
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break;
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case TLV_ACKNOWLEDGE_CANCEL_UNICAST_TRANSMISSION:
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break;
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}
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}
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return err;
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}
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