Callback for the source address and port pre-processing

[lingyphone]

For some reason, I want to get the source address and port of QUIC client outgoing connection for pre-processing before the QUIC handshake traffic sending. I saw QUIC_CONNECTION_EVENT_LOCAL_ADDRESS_CHANGED has been defined, but no where uses it. I would suggest the callback with this defined event or a new more specific event to tell the consumer app the local address before handshake.

diff --git a/src/core/connection.c b/src/core/connection.c
index 7630a5bc7953eb1a2ba1e1742a9a734ec40e1387..a6c88df85cffa540459c1a29140f37f5c99dd919 100644
--- a/src/core/connection.c
+++ b/src/core/connection.c
@@ -1897,6 +1897,15 @@ QuicConnStart(
         Connection,
         CASTED_CLOG_BYTEARRAY(sizeof(Path->Route.LocalAddress), &Path->Route.LocalAddress));
 
+    QUIC_CONNECTION_EVENT Event;
+    Event.Type = QUIC_CONNECTION_EVENT_LOCAL_ADDRESS_CHANGED;
+    Event.LOCAL_ADDRESS_CHANGED.Address = &Path->Route.LocalAddress;
+    QuicTraceLogConnVerbose(
+        IndicateLocalAddrChanged,
+        Connection,
+        "Indicating QUIC_CONNECTION_EVENT_LOCAL_ADDRESS_CHANGED");
+    (void)QuicConnIndicateEvent(Connection, &Event);
+
     //
     // Save the server name.
     //