263 lines
8.2 KiB
C
263 lines
8.2 KiB
C
/**
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* @file tlv.c
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* @note Copyright (C) 2012 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 02110-1301 USA.
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*/
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#include <arpa/inet.h>
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#include <string.h>
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#include "port.h"
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#include "tlv.h"
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uint8_t ieee8021_id[3] = { IEEE_802_1_COMMITTEE };
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static void scaled_ns_n2h(ScaledNs *sns)
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{
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sns->nanoseconds_msb = ntohs(sns->nanoseconds_msb);
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sns->nanoseconds_lsb = net2host64(sns->nanoseconds_msb);
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sns->fractional_nanoseconds = ntohs(sns->fractional_nanoseconds);
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}
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static void scaled_ns_h2n(ScaledNs *sns)
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{
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sns->nanoseconds_msb = htons(sns->nanoseconds_msb);
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sns->nanoseconds_lsb = host2net64(sns->nanoseconds_msb);
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sns->fractional_nanoseconds = htons(sns->fractional_nanoseconds);
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}
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static void mgt_post_recv(struct management_tlv *m)
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{
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struct defaultDS *dds;
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struct currentDS *cds;
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struct parentDS *pds;
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struct timePropertiesDS *tp;
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struct portDS *p;
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struct time_status_np *tsn;
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switch (m->id) {
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case DEFAULT_DATA_SET:
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dds = (struct defaultDS *) m->data;
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dds->numberPorts = ntohs(dds->numberPorts);
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dds->clockQuality.offsetScaledLogVariance =
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ntohs(dds->clockQuality.offsetScaledLogVariance);
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break;
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case CURRENT_DATA_SET:
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cds = (struct currentDS *) m->data;
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cds->stepsRemoved = ntohs(cds->stepsRemoved);
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cds->offsetFromMaster = net2host64(cds->offsetFromMaster);
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cds->meanPathDelay = net2host64(cds->meanPathDelay);
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break;
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case PARENT_DATA_SET:
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pds = (struct parentDS *) m->data;
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pds->parentPortIdentity.portNumber =
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ntohs(pds->parentPortIdentity.portNumber);
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pds->observedParentOffsetScaledLogVariance =
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ntohs(pds->observedParentOffsetScaledLogVariance);
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pds->observedParentClockPhaseChangeRate =
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ntohl(pds->observedParentClockPhaseChangeRate);
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pds->grandmasterClockQuality.offsetScaledLogVariance =
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ntohs(pds->grandmasterClockQuality.offsetScaledLogVariance);
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break;
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case TIME_PROPERTIES_DATA_SET:
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tp = (struct timePropertiesDS *) m->data;
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tp->currentUtcOffset = ntohs(tp->currentUtcOffset);
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break;
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case PORT_DATA_SET:
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p = (struct portDS *) m->data;
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p->portIdentity.portNumber = ntohs(p->portIdentity.portNumber);
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p->peerMeanPathDelay = net2host64(p->peerMeanPathDelay);
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break;
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case TIME_STATUS_NP:
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tsn = (struct time_status_np *) m->data;
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tsn->master_offset = net2host64(tsn->master_offset);
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tsn->ingress_time = net2host64(tsn->ingress_time);
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tsn->cumulativeScaledRateOffset = ntohl(tsn->cumulativeScaledRateOffset);
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tsn->scaledLastGmPhaseChange = ntohl(tsn->scaledLastGmPhaseChange);
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tsn->gmTimeBaseIndicator = ntohs(tsn->gmTimeBaseIndicator);
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scaled_ns_n2h(&tsn->lastGmPhaseChange);
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tsn->gmPresent = ntohl(tsn->gmPresent);
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break;
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}
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}
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static void mgt_pre_send(struct management_tlv *m)
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{
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struct defaultDS *dds;
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struct currentDS *cds;
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struct parentDS *pds;
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struct timePropertiesDS *tp;
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struct portDS *p;
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struct time_status_np *tsn;
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switch (m->id) {
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case DEFAULT_DATA_SET:
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dds = (struct defaultDS *) m->data;
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dds->numberPorts = htons(dds->numberPorts);
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dds->clockQuality.offsetScaledLogVariance =
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htons(dds->clockQuality.offsetScaledLogVariance);
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break;
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case CURRENT_DATA_SET:
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cds = (struct currentDS *) m->data;
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cds->stepsRemoved = htons(cds->stepsRemoved);
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cds->offsetFromMaster = host2net64(cds->offsetFromMaster);
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cds->meanPathDelay = host2net64(cds->meanPathDelay);
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break;
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case PARENT_DATA_SET:
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pds = (struct parentDS *) m->data;
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pds->parentPortIdentity.portNumber =
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htons(pds->parentPortIdentity.portNumber);
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pds->observedParentOffsetScaledLogVariance =
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htons(pds->observedParentOffsetScaledLogVariance);
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pds->observedParentClockPhaseChangeRate =
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htonl(pds->observedParentClockPhaseChangeRate);
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pds->grandmasterClockQuality.offsetScaledLogVariance =
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htons(pds->grandmasterClockQuality.offsetScaledLogVariance);
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break;
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case TIME_PROPERTIES_DATA_SET:
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tp = (struct timePropertiesDS *) m->data;
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tp->currentUtcOffset = htons(tp->currentUtcOffset);
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break;
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case PORT_DATA_SET:
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p = (struct portDS *) m->data;
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p->portIdentity.portNumber = htons(p->portIdentity.portNumber);
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p->peerMeanPathDelay = host2net64(p->peerMeanPathDelay);
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break;
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case TIME_STATUS_NP:
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tsn = (struct time_status_np *) m->data;
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tsn->master_offset = host2net64(tsn->master_offset);
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tsn->ingress_time = host2net64(tsn->ingress_time);
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tsn->cumulativeScaledRateOffset = htonl(tsn->cumulativeScaledRateOffset);
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tsn->scaledLastGmPhaseChange = htonl(tsn->scaledLastGmPhaseChange);
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tsn->gmTimeBaseIndicator = htons(tsn->gmTimeBaseIndicator);
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scaled_ns_h2n(&tsn->lastGmPhaseChange);
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tsn->gmPresent = htonl(tsn->gmPresent);
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break;
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}
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}
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static void org_post_recv(struct organization_tlv *org)
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{
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struct follow_up_info_tlv *f;
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if (0 == memcmp(org->id, ieee8021_id, sizeof(ieee8021_id))) {
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if (org->subtype[0] || org->subtype[1]) {
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return;
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}
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switch (org->subtype[2]) {
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case 1:
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f = (struct follow_up_info_tlv *) org;
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f->cumulativeScaledRateOffset = ntohl(f->cumulativeScaledRateOffset);
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f->gmTimeBaseIndicator = ntohs(f->gmTimeBaseIndicator);
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scaled_ns_n2h(&f->lastGmPhaseChange);
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f->scaledLastGmPhaseChange = ntohl(f->scaledLastGmPhaseChange);
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break;
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}
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}
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}
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static void org_pre_send(struct organization_tlv *org)
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{
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struct follow_up_info_tlv *f;
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if (0 == memcmp(org->id, ieee8021_id, sizeof(ieee8021_id))) {
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if (org->subtype[0] || org->subtype[1]) {
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return;
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}
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switch (org->subtype[2]) {
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case 1:
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f = (struct follow_up_info_tlv *) org;
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f->cumulativeScaledRateOffset = htonl(f->cumulativeScaledRateOffset);
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f->gmTimeBaseIndicator = htons(f->gmTimeBaseIndicator);
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scaled_ns_h2n(&f->lastGmPhaseChange);
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f->scaledLastGmPhaseChange = htonl(f->scaledLastGmPhaseChange);
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break;
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}
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}
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}
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void tlv_post_recv(struct TLV *tlv)
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{
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struct management_tlv *mgt;
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struct management_error_status *mes;
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struct path_trace_tlv *ptt;
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switch (tlv->type) {
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case TLV_MANAGEMENT:
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mgt = (struct management_tlv *) tlv;
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mgt->id = ntohs(mgt->id);
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mgt_post_recv(mgt);
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break;
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case TLV_MANAGEMENT_ERROR_STATUS:
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mes = (struct management_error_status *) tlv;
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mes->error = ntohs(mes->error);
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mes->id = ntohs(mes->id);
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break;
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case TLV_ORGANIZATION_EXTENSION:
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org_post_recv((struct organization_tlv *) tlv);
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break;
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case TLV_REQUEST_UNICAST_TRANSMISSION:
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case TLV_GRANT_UNICAST_TRANSMISSION:
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case TLV_CANCEL_UNICAST_TRANSMISSION:
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case TLV_ACKNOWLEDGE_CANCEL_UNICAST_TRANSMISSION:
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break;
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case TLV_PATH_TRACE:
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ptt = (struct path_trace_tlv *) tlv;
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if (path_length(ptt) > PATH_TRACE_MAX) {
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ptt->length = PATH_TRACE_MAX * sizeof(struct ClockIdentity);
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}
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break;
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case TLV_ALTERNATE_TIME_OFFSET_INDICATOR:
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case TLV_AUTHENTICATION:
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case TLV_AUTHENTICATION_CHALLENGE:
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case TLV_SECURITY_ASSOCIATION_UPDATE:
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case TLV_CUM_FREQ_SCALE_FACTOR_OFFSET:
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default:
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break;
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}
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}
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void tlv_pre_send(struct TLV *tlv)
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{
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struct management_tlv *mgt;
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struct management_error_status *mes;
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switch (tlv->type) {
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case TLV_MANAGEMENT:
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mgt = (struct management_tlv *) tlv;
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mgt_pre_send(mgt);
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mgt->id = htons(mgt->id);
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break;
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case TLV_MANAGEMENT_ERROR_STATUS:
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mes = (struct management_error_status *) tlv;
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mes->error = htons(mes->error);
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mes->id = htons(mes->id);
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break;
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case TLV_ORGANIZATION_EXTENSION:
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org_pre_send((struct organization_tlv *) tlv);
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break;
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case TLV_REQUEST_UNICAST_TRANSMISSION:
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case TLV_GRANT_UNICAST_TRANSMISSION:
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case TLV_CANCEL_UNICAST_TRANSMISSION:
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case TLV_ACKNOWLEDGE_CANCEL_UNICAST_TRANSMISSION:
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case TLV_PATH_TRACE:
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case TLV_ALTERNATE_TIME_OFFSET_INDICATOR:
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case TLV_AUTHENTICATION:
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case TLV_AUTHENTICATION_CHALLENGE:
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case TLV_SECURITY_ASSOCIATION_UPDATE:
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case TLV_CUM_FREQ_SCALE_FACTOR_OFFSET:
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default:
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break;
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}
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}
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