Careful resume structs + encode/decode code

docs/BUILD.md

@@ -155,6 +155,14 @@ For more info, take a look at the [build.ps1](../scripts/build.ps1) script.
 
 By default the build output will go in the `build` folder and the final build binaries in the `artifacts` folder. Under that it will create per-platform folders with subfolders for architecture/tls combinations. This allows for building different platforms and configurations at the same time.
 
+## Updating Clog Sidecar
+
+Some code changes such as adding/updating new MsQuic traces require updating the CLOG sidecar for successful Linux builds. This is done by running the following command:
+```PowerShell
+./scripts/update-sidecar.ps1
+```
+This makes any necessary updates to the clog sidecar manifest and the generated files under `src/generated/` folder. The modified files must be committed along with the rest of the code changes for addressing the Linux build failures.
+
 # Building with CMake
 
 The following section details how to build MsQuic purely with CMake commands.

src/core/congestion_control.h

@@ -171,6 +171,42 @@ 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)) {