SPDY: add SETTINGS_MINOR_VERSION

codec-http/src/main/java/io/netty/handler/codec/spdy/DefaultSpdySettingsFrame.java

@@ -57,7 +57,7 @@ public class DefaultSpdySettingsFrame implements SpdySettingsFrame {
 
     @Override
     public SpdySettingsFrame setValue(int id, int value, boolean persistValue, boolean persisted) {
-        if (id <= 0 || id > SpdyCodecUtil.SPDY_SETTINGS_MAX_ID) {
+        if (id < 0 || id > SpdyCodecUtil.SPDY_SETTINGS_MAX_ID) {
             throw new IllegalArgumentException("Setting ID is not valid: " + id);
         }
         Integer key = Integer.valueOf(id);

codec-http/src/main/java/io/netty/handler/codec/spdy/SpdyFrameDecoder.java

@@ -191,14 +191,6 @@ public class SpdyFrameDecoder extends ByteToMessageDecoder {
                 int value = getSignedInt(buffer, buffer.readerIndex() + 4);
                 buffer.skipBytes(8);
 
-                // Check for invalid ID -- avoid IllegalArgumentException in setValue
-                if (ID == 0) {
-                    state = State.FRAME_ERROR;
-                    spdySettingsFrame = null;
-                    fireInvalidFrameException(ctx);
-                    return;
-                }
-
                 if (!spdySettingsFrame.isSet(ID)) {
                     boolean persistVal = (ID_flags & SPDY_SETTINGS_PERSIST_VALUE) != 0;
                     boolean persisted  = (ID_flags & SPDY_SETTINGS_PERSISTED) != 0;

codec-http/src/main/java/io/netty/handler/codec/spdy/SpdySessionHandler.java

@@ -60,6 +60,7 @@ public class SpdySessionHandler extends ChannelHandlerAdapter {
     private ChannelFutureListener closeSessionFutureListener;
 
     private final boolean server;
+    private final int minorVersion;
     private final boolean sessionFlowControl;
 
     /**
@@ -76,6 +77,7 @@ public class SpdySessionHandler extends ChannelHandlerAdapter {
             throw new NullPointerException("version");
         }
         this.server = server;
+        minorVersion = version.getMinorVersion();
         sessionFlowControl = version.useSessionFlowControl();
     }
 
@@ -294,6 +296,13 @@ public class SpdySessionHandler extends ChannelHandlerAdapter {
 
             SpdySettingsFrame spdySettingsFrame = (SpdySettingsFrame) msg;
 
+            int settingsMinorVersion = spdySettingsFrame.getValue(SpdySettingsFrame.SETTINGS_MINOR_VERSION);
+            if (settingsMinorVersion >= 0 && settingsMinorVersion != minorVersion) {
+                // Settings frame had the wrong minor version
+                issueSessionError(ctx, SpdySessionStatus.PROTOCOL_ERROR);
+                return;
+            }
+
             int newConcurrentStreams =
                 spdySettingsFrame.getValue(SpdySettingsFrame.SETTINGS_MAX_CONCURRENT_STREAMS);
             if (newConcurrentStreams >= 0) {
@@ -574,6 +583,13 @@ public class SpdySessionHandler extends ChannelHandlerAdapter {
 
             SpdySettingsFrame spdySettingsFrame = (SpdySettingsFrame) msg;
 
+            int settingsMinorVersion = spdySettingsFrame.getValue(SpdySettingsFrame.SETTINGS_MINOR_VERSION);
+            if (settingsMinorVersion >= 0 && settingsMinorVersion != minorVersion) {
+                // Settings frame had the wrong minor version
+                promise.setFailure(PROTOCOL_EXCEPTION);
+                return;
+            }
+
             int newConcurrentStreams =
                     spdySettingsFrame.getValue(SpdySettingsFrame.SETTINGS_MAX_CONCURRENT_STREAMS);
             if (newConcurrentStreams >= 0) {

codec-http/src/main/java/io/netty/handler/codec/spdy/SpdySettingsFrame.java

@@ -22,6 +22,7 @@ import java.util.Set;
  */
 public interface SpdySettingsFrame extends SpdyFrame {
 
+    int SETTINGS_MINOR_VERSION                  = 0;
     int SETTINGS_UPLOAD_BANDWIDTH               = 1;
     int SETTINGS_DOWNLOAD_BANDWIDTH             = 2;
     int SETTINGS_ROUND_TRIP_TIME                = 3;
@@ -50,7 +51,7 @@ public interface SpdySettingsFrame extends SpdyFrame {
 
     /**
      * Sets the value of the setting ID.
-     * The ID must be positive and cannot exceed 16777215.
+     * The ID cannot be negative and cannot exceed 16777215.
      */
     SpdySettingsFrame setValue(int id, int value);
 
@@ -58,7 +59,7 @@ public interface SpdySettingsFrame extends SpdyFrame {
      * Sets the value of the setting ID.
      * Sets if the setting should be persisted (should only be set by the server).
      * Sets if the setting is persisted (should only be set by the client).
-     * The ID must be positive and cannot exceed 16777215.
+     * The ID cannot be negative and cannot exceed 16777215.
      */
     SpdySettingsFrame setValue(int id, int value, boolean persistVal, boolean persisted);
 

codec-http/src/main/java/io/netty/handler/codec/spdy/SpdyVersion.java

@@ -16,14 +16,16 @@
 package io.netty.handler.codec.spdy;
 
 public enum SpdyVersion {
-    SPDY_3   (3, false),
+    SPDY_3   (3, 0, false),
-    SPDY_3_1 (3, true);
+    SPDY_3_1 (3, 1, true);
 
     private final int version;
+    private final int minorVersion;
     private final boolean sessionFlowControl;
 
-    private SpdyVersion(int version, boolean sessionFlowControl) {
+    private SpdyVersion(int version, int minorVersion, boolean sessionFlowControl) {
         this.version = version;
+        this.minorVersion = minorVersion;
         this.sessionFlowControl = sessionFlowControl;
     }
 
@@ -31,6 +33,10 @@ public enum SpdyVersion {
         return version;
     }
 
+    int getMinorVersion() {
+        return minorVersion;
+    }
+
     boolean useSessionFlowControl() {
         return sessionFlowControl;
     }