Careful resume structs + encode/decode code

src/core/congestion_control.h

@@ -171,6 +171,32 @@ typedef struct QUIC_CONGESTION_CONTROL {
 
 } QUIC_CONGESTION_CONTROL;
 
+
+//
+// V1 supports careful resume on 1 path per remote endpoint
+//
+typedef struct QUIC_CONN_CAREFUL_RESUME_V1 {
+
+    // Path RTT parameters
+    uint64_t SmoothedRtt;
+    uint64_t MinRtt;
+
+    // Remote endpoint and the Path RTT parameters help match the path during Careful Resume
+    QUIC_ADDR RemoteEndpoint;
+
+    // Future Expiration Time in Unix Epoch microsecond units
+    uint64_t Expiration;
+
+    // Congestion algorithm last used
+    QUIC_CONGESTION_CONTROL_ALGORITHM Algorithm;
+
+    // CWND size in bytes for Careful Resume
+    uint32_t CongestionWindow;
+
+} QUIC_CONN_CAREFUL_RESUME_V1;
+
+typedef struct QUIC_CONN_CAREFUL_RESUME_V1 QUIC_CONN_CAREFUL_RESUME_STATE;
+
 //
 // Initializes the algorithm specific congestion control algorithm.
 //

src/core/connection.c

@@ -2054,6 +2054,7 @@ QuicConnSendResumptionTicket(
             AppDataLength,
             AppResumptionData,
             Connection->HandshakeTP,
+            NULL,    // No Careful Resumption data
             AlpnLength,
             Connection->Crypto.TlsState.NegotiatedAlpn + 1,
             &TicketBuffer,
@@ -2112,6 +2113,7 @@ QuicConnRecvResumptionTicket(
                 Connection->Configuration->AlpnList,
                 Connection->Configuration->AlpnListLength,
                 &ResumedTP,
+                NULL,    // No Careful Resumption data
                 &AppData,
                 &AppDataLength);
         if (QUIC_FAILED(Status)) {