chao/linuxptp
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

tlv: Encode and decode SLAVE_RX_SYNC_TIMING_DATA TLVs.

Browse Source 
Signed-off-by: Richard Cochran <richardcochran@gmail.com>
This commit is contained in:
Richard Cochran 2020-04-06 16:33:13 -07:00
parent b4d3b4126f
commit d0aa29b932
2 changed files with 101 additions and 5 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

78
tlv.c
View File

@ -53,6 +53,20 @@ static void scaled_ns_h2n(ScaledNs *sns)
sns->fractional_nanoseconds = htons(sns->fractional_nanoseconds);
}
static void timestamp_host2net(struct Timestamp *t)
{
HTONL(t->seconds_lsb);
HTONS(t->seconds_msb);
HTONL(t->nanoseconds);
}
static void timestamp_net2host(struct Timestamp *t)
{
NTOHL(t->seconds_lsb);
NTOHS(t->seconds_msb);
NTOHL(t->nanoseconds);
}
static uint16_t flip16(uint16_t *p)
{
uint16_t v;
@ -80,11 +94,16 @@ static int64_t net2host64_unaligned(int64_t *p)
return v;
}
static size_t tlv_array_count(struct TLV *tlv, size_t base_size, size_t item_size)
{
return (tlv->length - base_size) / item_size;
}
static bool tlv_array_invalid(struct TLV *tlv, size_t base_size, size_t item_size)
{
size_t expected_length, n_items;
n_items = (tlv->length - base_size) / item_size;
n_items = tlv_array_count(tlv, base_size, item_size);
expected_length = base_size + n_items * item_size;
@ -575,6 +594,57 @@ static void org_pre_send(struct organization_tlv *org)
}
}
static int slave_rx_sync_timing_data_post_revc(struct tlv_extra *extra)
{
struct slave_rx_sync_timing_data_tlv *slave_data =
(struct slave_rx_sync_timing_data_tlv *) extra->tlv;
size_t base_size = sizeof(slave_data->sourcePortIdentity), n_items;
struct slave_rx_sync_timing_record *record;
if (tlv_array_invalid(extra->tlv, base_size, sizeof(*record))) {
return -EBADMSG;
}
n_items = tlv_array_count(extra->tlv, base_size, sizeof(*record));
record = slave_data->record;
NTOHS(slave_data->sourcePortIdentity.portNumber);
while (n_items) {
NTOHS(record->sequenceId);
timestamp_net2host(&record->syncOriginTimestamp);
net2host64_unaligned(&record->totalCorrectionField);
NTOHL(record->scaledCumulativeRateOffset);
timestamp_net2host(&record->syncEventIngressTimestamp);
n_items--;
record++;
}
return 0;
}
static void slave_rx_sync_timing_data_pre_send(struct tlv_extra *extra)
{
struct slave_rx_sync_timing_data_tlv *slave_data =
(struct slave_rx_sync_timing_data_tlv *) extra->tlv;
size_t base_size = sizeof(slave_data->sourcePortIdentity), n_items;
struct slave_rx_sync_timing_record *record;
n_items = tlv_array_count(extra->tlv, base_size, sizeof(*record));
record = slave_data->record;
HTONS(slave_data->sourcePortIdentity.portNumber);
while (n_items) {
HTONS(record->sequenceId);
timestamp_host2net(&record->syncOriginTimestamp);
host2net64_unaligned(&record->totalCorrectionField);
HTONL(record->scaledCumulativeRateOffset);
timestamp_host2net(&record->syncEventIngressTimestamp);
n_items--;
record++;
}
}
static int unicast_message_type_valid(uint8_t message_type)
{
message_type >>= 4;
@ -743,7 +813,10 @@ int tlv_post_recv(struct tlv_extra *extra)
case TLV_L1_SYNC:
case TLV_PORT_COMMUNICATION_AVAILABILITY:
case TLV_PROTOCOL_ADDRESS:
break;
case TLV_SLAVE_RX_SYNC_TIMING_DATA:
result = slave_rx_sync_timing_data_post_revc(extra);
break;
case TLV_SLAVE_RX_SYNC_COMPUTED_DATA:
case TLV_SLAVE_TX_EVENT_TIMESTAMPS:
case TLV_CUMULATIVE_RATE_RATIO:
@ -800,7 +873,10 @@ void tlv_pre_send(struct TLV *tlv, struct tlv_extra *extra)
case TLV_L1_SYNC:
case TLV_PORT_COMMUNICATION_AVAILABILITY:
case TLV_PROTOCOL_ADDRESS:
break;
case TLV_SLAVE_RX_SYNC_TIMING_DATA:
slave_rx_sync_timing_data_pre_send(extra);
break;
case TLV_SLAVE_RX_SYNC_COMPUTED_DATA:
case TLV_SLAVE_TX_EVENT_TIMESTAMPS:
case TLV_CUMULATIVE_RATE_RATIO:

28
tlv.h
View File

@ -224,6 +224,11 @@ struct path_trace_tlv {
struct ClockIdentity cid[0];
} PACKED;
static inline unsigned int path_length(struct path_trace_tlv *p)
{
return p->length / sizeof(struct ClockIdentity);
}
struct request_unicast_xmit_tlv {
Enumeration16 type;
UInteger16 length;
@ -232,10 +237,25 @@ struct request_unicast_xmit_tlv {
UInteger32 durationField;
} PACKED;
static inline unsigned int path_length(struct path_trace_tlv *p)
{
return p->length / sizeof(struct ClockIdentity);
}
struct slave_rx_sync_timing_record {
UInteger16 sequenceId;
struct Timestamp syncOriginTimestamp;
TimeInterval totalCorrectionField;
Integer32 scaledCumulativeRateOffset;
struct Timestamp syncEventIngressTimestamp;
} PACKED;
struct slave_rx_sync_timing_data_tlv {
Enumeration16 type;
UInteger16 length;
struct PortIdentity sourcePortIdentity;
struct slave_rx_sync_timing_record record[0];
} PACKED;
#define SLAVE_RX_SYNC_TIMING_MAX \
((sizeof(struct message_data) - sizeof(struct signaling_msg) - \
sizeof(struct slave_rx_sync_timing_data_tlv)) / \
sizeof(struct slave_rx_sync_timing_record))
typedef struct Integer96 {
uint16_t nanoseconds_msb;