ptp: Work around bug in ptpd in default configuration

[platform/upstream/gstreamer.git] / subprojects / gstreamer / libs / gst / net / gstptpclock.c

diff --git a/subprojects/gstreamer/libs/gst/net/gstptpclock.c b/subprojects/gstreamer/libs/gst/net/gstptpclock.c
index 018e810..5a664ca 100644 (file)
--- a/subprojects/gstreamer/libs/gst/net/gstptpclock.c
+++ b/subprojects/gstreamer/libs/gst/net/gstptpclock.c
@@ -346,6 +346,11 @@ static GHookList domain_stats_hooks;
 static gint domain_stats_n_hooks;
 static gboolean domain_stats_hooks_initted = FALSE;
 
+/* Only ever accessed from the PTP thread */
+/* PTPD in hybrid mode (default) sends multicast PTP messages with an invalid
+ * logMessageInterval. We work around this here and warn once */
+static gboolean ptpd_hybrid_workaround_warned_once = FALSE;
+
 /* Converts log2 seconds to GstClockTime */
 static GstClockTime
 log2_to_clock_time (gint l)
@@ -909,7 +914,17 @@ handle_announce_message (PtpMessage * msg, GstClockTime receive_time)
       return;
   }
 
-  sender->announce_interval = log2_to_clock_time (msg->log_message_interval);
+  if (msg->log_message_interval == 0x7f) {
+    sender->announce_interval = 2 * GST_SECOND;
+
+    if (!ptpd_hybrid_workaround_warned_once) {
+      GST_WARNING ("Working around ptpd bug: ptpd sends multicast PTP packets "
+          "with invalid logMessageInterval");
+      ptpd_hybrid_workaround_warned_once = TRUE;
+    }
+  } else {
+    sender->announce_interval = log2_to_clock_time (msg->log_message_interval);
+  }
 
   announce = g_new0 (PtpAnnounceMessage, 1);
   announce->receive_time = receive_time;
@@ -1511,7 +1526,17 @@ handle_sync_message (PtpMessage * msg, GstClockTime receive_time)
     return;
 #endif
 
-  domain->sync_interval = log2_to_clock_time (msg->log_message_interval);
+  if (msg->log_message_interval == 0x7f) {
+    domain->sync_interval = GST_SECOND;
+
+    if (!ptpd_hybrid_workaround_warned_once) {
+      GST_WARNING ("Working around ptpd bug: ptpd sends multicast PTP packets "
+          "with invalid logMessageInterval");
+      ptpd_hybrid_workaround_warned_once = TRUE;
+    }
+  } else {
+    domain->sync_interval = log2_to_clock_time (msg->log_message_interval);
+  }
 
   /* Check if duplicated */
   for (l = domain->pending_syncs.head; l; l = l->next) {
@@ -1708,8 +1733,18 @@ handle_delay_resp_message (PtpMessage * msg, GstClockTime receive_time)
       requesting_port_identity.port_number != ptp_clock_id.port_number)
     return;
 
-  domain->min_delay_req_interval =
-      log2_to_clock_time (msg->log_message_interval);
+  if (msg->log_message_interval == 0x7f) {
+    domain->min_delay_req_interval = GST_SECOND;
+
+    if (!ptpd_hybrid_workaround_warned_once) {
+      GST_WARNING ("Working around ptpd bug: ptpd sends multicast PTP packets "
+          "with invalid logMessageInterval");
+      ptpd_hybrid_workaround_warned_once = TRUE;
+    }
+  } else {
+    domain->min_delay_req_interval =
+        log2_to_clock_time (msg->log_message_interval);
+  }
 
   /* Check if we know about this one */
   for (l = domain->pending_syncs.head; l; l = l->next) {