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clock: Simplify management response logic. 

The code uses a local variable for program flow control in a silly way.
This patch simplifies the logic by using the common switch/case/default
pattern instead.

Signed-off-by: Richard Cochran <richardcochran@gmail.com>
master
Richard Cochran 2018-02-17 19:58:50 -08:00
parent 2d25209993
commit 4a39103c74
1 changed files with 13 additions and 25 deletions
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38
clock.c
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@ -335,13 +335,13 @@ static int clock_management_fill_response(struct clock *c, struct port *p,
struct ptp_message *req,
struct ptp_message *rsp, int id)
{
int datalen = 0, respond = 0;
struct management_tlv *tlv;
struct management_tlv_datum *mtd;
struct time_status_np *tsn;
struct grandmaster_settings_np *gsn;
struct subscribe_events_np *sen;
struct PTPText *text;
int datalen = 0;
tlv = (struct management_tlv *) rsp->management.suffix;
tlv->type = TLV_MANAGEMENT;
@ -353,69 +353,57 @@ static int clock_management_fill_response(struct clock *c, struct port *p,
text->length = c->desc.userDescription.length;
memcpy(text->text, c->desc.userDescription.text, text->length);
datalen = 1 + text->length;
respond = 1;
break;
case TLV_DEFAULT_DATA_SET:
memcpy(tlv->data, &c->dds, sizeof(c->dds));
datalen = sizeof(c->dds);
respond = 1;
break;
case TLV_CURRENT_DATA_SET:
memcpy(tlv->data, &c->cur, sizeof(c->cur));
datalen = sizeof(c->cur);
respond = 1;
break;
case TLV_PARENT_DATA_SET:
memcpy(tlv->data, &c->dad.pds, sizeof(c->dad.pds));
datalen = sizeof(c->dad.pds);
respond = 1;
break;
case TLV_TIME_PROPERTIES_DATA_SET:
memcpy(tlv->data, &c->tds, sizeof(c->tds));
datalen = sizeof(c->tds);
respond = 1;
break;
case TLV_PRIORITY1:
mtd = (struct management_tlv_datum *) tlv->data;
mtd->val = c->dds.priority1;
datalen = sizeof(*mtd);
respond = 1;
break;
case TLV_PRIORITY2:
mtd = (struct management_tlv_datum *) tlv->data;
mtd->val = c->dds.priority2;
datalen = sizeof(*mtd);
respond = 1;
break;
case TLV_DOMAIN:
mtd = (struct management_tlv_datum *) tlv->data;
mtd->val = c->dds.domainNumber;
datalen = sizeof(*mtd);
respond = 1;
break;
case TLV_SLAVE_ONLY:
mtd = (struct management_tlv_datum *) tlv->data;
mtd->val = c->dds.flags & DDS_SLAVE_ONLY;
datalen = sizeof(*mtd);
respond = 1;
break;
case TLV_CLOCK_ACCURACY:
mtd = (struct management_tlv_datum *) tlv->data;
mtd->val = c->dds.clockQuality.clockAccuracy;
datalen = sizeof(*mtd);
respond = 1;
break;
case TLV_TRACEABILITY_PROPERTIES:
mtd = (struct management_tlv_datum *) tlv->data;
mtd->val = c->tds.flags & (TIME_TRACEABLE|FREQ_TRACEABLE);
datalen = sizeof(*mtd);
respond = 1;
break;
case TLV_TIMESCALE_PROPERTIES:
mtd = (struct management_tlv_datum *) tlv->data;
mtd->val = c->tds.flags & PTP_TIMESCALE;
datalen = sizeof(*mtd);
respond = 1;
break;
case TLV_TIME_STATUS_NP:
tsn = (struct time_status_np *) tlv->data;
@ -433,7 +421,6 @@ static int clock_management_fill_response(struct clock *c, struct port *p,
tsn->gmPresent = 1;
tsn->gmIdentity = c->dad.pds.grandmasterIdentity;
datalen = sizeof(*tsn);
respond = 1;
break;
case TLV_GRANDMASTER_SETTINGS_NP:
gsn = (struct grandmaster_settings_np *) tlv->data;
@ -442,7 +429,6 @@ static int clock_management_fill_response(struct clock *c, struct port *p,
gsn->time_flags = c->time_flags;
gsn->time_source = c->time_source;
datalen = sizeof(*gsn);
respond = 1;
break;
case TLV_SUBSCRIBE_EVENTS_NP:
if (p != c->uds_port) {
@ -451,19 +437,21 @@ static int clock_management_fill_response(struct clock *c, struct port *p,
}
sen = (struct subscribe_events_np *)tlv->data;
clock_get_subscription(c, req, sen->bitmask, &sen->duration);
respond = 1;
break;
default:
/* The caller should *not* respond to this message. */
return 0;
}
if (respond) {
if (datalen % 2) {
tlv->data[datalen] = 0;
datalen++;
}
tlv->length = sizeof(tlv->id) + datalen;
rsp->header.messageLength += sizeof(*tlv) + datalen;
rsp->tlv_count = 1;
if (datalen % 2) {
tlv->data[datalen] = 0;
datalen++;
}
return respond;
tlv->length = sizeof(tlv->id) + datalen;
rsp->header.messageLength += sizeof(*tlv) + datalen;
rsp->tlv_count = 1;
/* The caller can respond to this message. */
return 1;
}
static int clock_management_get_response(struct clock *c, struct port *p,