SRT: Upgrade libsrt from 1.4.1 to 1.5.1. v6.0.12 (#3362)

Co-authored-by: winlin <winlin@vip.126.com>

trunk/3rdparty/srt-1-fit/srtcore/group_common.cpp

@@ -0,0 +1,63 @@
+/*
+ * SRT - Secure, Reliable, Transport
+ * Copyright (c) 2021 Haivision Systems Inc.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ */
+
+/*****************************************************************************
+Written by
+   Haivision Systems Inc.
+*****************************************************************************/
+
+#include "platform_sys.h"
+
+#include "group_common.h"
+#include "api.h"
+
+namespace srt
+{
+namespace groups
+{
+
+SocketData prepareSocketData(CUDTSocket* s)
+{
+    // This uses default SRT_GST_BROKEN because when the group operation is done,
+    // then the SRT_GST_IDLE state automatically turns into SRT_GST_RUNNING. This is
+    // recognized as an initial state of the fresh added socket to the group,
+    // so some "initial configuration" must be done on it, after which it's
+    // turned into SRT_GST_RUNNING, that is, it's treated as all others. When
+    // set to SRT_GST_BROKEN, this socket is disregarded. This socket isn't cleaned
+    // up, however, unless the status is simultaneously SRTS_BROKEN.
+
+    // The order of operations is then:
+    // - add the socket to the group in this "broken" initial state
+    // - connect the socket (or get it extracted from accept)
+    // - update the socket state (should be SRTS_CONNECTED)
+    // - once the connection is established (may take time with connect), set SRT_GST_IDLE
+    // - the next operation of send/recv will automatically turn it into SRT_GST_RUNNING
+    SocketData sd = {
+        s->m_SocketID,
+        s,
+        -1,
+        SRTS_INIT,
+        SRT_GST_BROKEN,
+        SRT_GST_BROKEN,
+        -1,
+        -1,
+        sockaddr_any(),
+        sockaddr_any(),
+        false,
+        false,
+        false,
+        0, // weight
+        0  // pktSndDropTotal
+    };
+    return sd;
+}
+
+} // namespace groups
+} // namespace srt