Adds further ext deps as-is binaries copies from customers env.

external/tmsif/include/dds/ddsi/ddsi_hbcontrol.h

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+// Copyright(c) 2006 to 2020 ZettaScale Technology and others
+//
+// This program and the accompanying materials are made available under the
+// terms of the Eclipse Public License v. 2.0 which is available at
+// http://www.eclipse.org/legal/epl-2.0, or the Eclipse Distribution License
+// v. 1.0 which is available at
+// http://www.eclipse.org/org/documents/edl-v10.php.
+//
+// SPDX-License-Identifier: EPL-2.0 OR BSD-3-Clause
+
+#ifndef DDSI_HBCONTROL_H
+#define DDSI_HBCONTROL_H
+
+#include "dds/features.h"
+#include "dds/ddsrt/time.h"
+
+#if defined (__cplusplus)
+extern "C" {
+#endif
+
+/// @brief State information used in deciding when/what kind of a heartbeat to send (per writer)
+///
+/// Heartbeats inform readers of the range of sequence numbers available from the writer and serve the dual
+/// purpose of (1) allowing the reader to detect message loss, and (2) allowing the reader to request a retransmit.
+///
+/// Because readers are not allowed to request a retransmit unless they received a heartbeat, we make an
+/// effort to a embed heartbeat in an outgoing RTPS message (~ a packet) if a preceding RTPS message
+/// also contained data from the writer. Its sole purpose is to allow it to request a retransmit.
+struct ddsi_hbcontrol {
+  ddsrt_mtime_t t_of_last_write; ///< Time of most recent write
+  ddsrt_mtime_t t_of_last_hb;    ///< Time of last heartbeat sent
+  ddsrt_mtime_t t_of_last_ackhb; ///< Time of last heartbeat sent that requires a response
+  ddsrt_mtime_t tsched;          ///< Time at which next asynchronous heartbeat is scheduled
+  uint32_t hbs_since_last_write; ///< Number of heartbeats sent since last write
+  uint32_t last_packetid;        ///< Last RTPS message id containing a heartbeat from this writer
+};
+
+/// @brief Encoding for possible ways of adding heartbeats to messages
+enum ddsi_hbcontrol_ack_required {
+  DDSI_HBC_ACK_REQ_NO,           ///< Heartbeat does not require a response (FINAL flag set)
+  DDSI_HBC_ACK_REQ_YES,          ///< Heartbeat requires a response, may continue packing
+  DDSI_HBC_ACK_REQ_YES_AND_FLUSH ///< Heartbeat requires a response, must send immediately
+};
+
+#if defined (__cplusplus)
+}
+#endif
+
+#endif /* DDSI_HBCONTROL_H */