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Revert "Revert "SslHandler avoid calling wrap/unwrap when unnecessary""

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Motivation:
PR https://github.com/netty/netty/pull/6803 corrected an error in the return status of the OpenSslEngine. We should now be able to restore the SslHandler optimization.

Modifications:
- This reverts commit 7f3b75a5091dcd6d882102fdb92daa6931e02c30.

Result:
SslHandler optimization is restored.
This commit is contained in:
Scott Mitchell 2017-06-02 09:26:27 -07:00
parent 7cfe416182
commit 81fb2eede8
1 changed files with 18 additions and 7 deletions
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25
handler/src/main/java/io/netty/handler/ssl/SslHandler.java
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@ -837,7 +837,7 @@ public class SslHandler extends ByteToMessageDecoder implements ChannelOutboundH
* {@link #setHandshakeFailure(ChannelHandlerContext, Throwable)}.
* @return {@code true} if this method ends on {@link SSLEngineResult.HandshakeStatus#NOT_HANDSHAKING}.
*/
private void wrapNonAppData(ChannelHandlerContext ctx, boolean inUnwrap) throws SSLException {
private boolean wrapNonAppData(ChannelHandlerContext ctx, boolean inUnwrap) throws SSLException {
ByteBuf out = null;
ByteBufAllocator alloc = ctx.alloc();
try {
@ -863,7 +863,7 @@ public class SslHandler extends ByteToMessageDecoder implements ChannelOutboundH
switch (result.getHandshakeStatus()) {
case FINISHED:
setHandshakeSuccess();
break;
return false;
case NEED_TASK:
runDelegatedTasks();
break;
@ -872,7 +872,7 @@ public class SslHandler extends ByteToMessageDecoder implements ChannelOutboundH
// If we asked for a wrap, the engine requested an unwrap, and we are in unwrap there is
// no use in trying to call wrap again because we have already attempted (or will after we
// return) to feed more data to the engine.
return;
return false;
}
unwrapNonAppData(ctx);
@ -886,7 +886,7 @@ public class SslHandler extends ByteToMessageDecoder implements ChannelOutboundH
if (!inUnwrap) {
unwrapNonAppData(ctx);
}
break;
return true;
default:
throw new IllegalStateException("Unknown handshake status: " + result.getHandshakeStatus());
}
@ -906,6 +906,7 @@ public class SslHandler extends ByteToMessageDecoder implements ChannelOutboundH
out.release();
}
}
return false;
}
private SSLEngineResult wrap(ByteBufAllocator alloc, SSLEngine engine, ByteBuf in, ByteBuf out)
@ -1210,7 +1211,7 @@ public class SslHandler extends ByteToMessageDecoder implements ChannelOutboundH
try {
// Only continue to loop if the handler was not removed in the meantime.
// See https://github.com/netty/netty/issues/5860
while (!ctx.isRemoved()) {
unwrapLoop: while (!ctx.isRemoved()) {
final SSLEngineResult result = engineType.unwrap(this, packet, offset, length, decodeOut);
final Status status = result.getStatus();
final HandshakeStatus handshakeStatus = result.getHandshakeStatus();
@ -1260,7 +1261,12 @@ public class SslHandler extends ByteToMessageDecoder implements ChannelOutboundH
case NEED_UNWRAP:
break;
case NEED_WRAP:
wrapNonAppData(ctx, true);
// If the wrap operation transitions the status to NOT_HANDSHAKING and there is no more data to
// unwrap then the next call to unwrap will not produce any data. We can avoid the potentially
// costly unwrap operation and break out of the loop.
if (wrapNonAppData(ctx, true) && length == 0) {
break unwrapLoop;
}
break;
case NEED_TASK:
runDelegatedTasks();
@ -1293,7 +1299,12 @@ public class SslHandler extends ByteToMessageDecoder implements ChannelOutboundH
flushedBeforeHandshake = false;
wrapLater = true;
}
// If we are not handshaking and there is no more data to unwrap then the next call to unwrap
// will not produce any data. We can avoid the potentially costly unwrap operation and break
// out of the loop.
if (length == 0) {
break unwrapLoop;
}
break;
default:
throw new IllegalStateException("unknown handshake status: " + handshakeStatus);