1 files changed, 153 insertions, 0 deletions
diff --git a/qpid/cpp/src/qpid/framing/AMQFrame.cpp b/qpid/cpp/src/qpid/framing/AMQFrame.cpp
new file mode 100644
index 0000000000..cd60cd971f
--- /dev/null
+++ b/qpid/cpp/src/qpid/framing/AMQFrame.cpp
@@ -0,0 +1,153 @@
+/*
+ *
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ * 
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ *
+ */
+#include "qpid/framing/AMQFrame.h"
+
+#include "qpid/framing/AMQMethodBody.h"
+#include "qpid/framing/reply_exceptions.h"
+#include "qpid/framing/BodyFactory.h"
+#include "qpid/framing/MethodBodyFactory.h"
+#include "qpid/Msg.h"
+
+#include <boost/format.hpp>
+#include <iostream>
+
+namespace qpid {
+namespace framing {
+
+void AMQFrame::init() { bof = eof = bos = eos = true; subchannel=0; channel=0; }
+
+AMQFrame::AMQFrame(const boost::intrusive_ptr<AMQBody>& b) : body(b) { init(); }
+
+AMQFrame::AMQFrame(const AMQBody& b) : body(b.clone()) { init(); }
+
+AMQFrame::~AMQFrame() {}
+
+void AMQFrame::setMethod(ClassId c, MethodId m) { body = MethodBodyFactory::create(c,m); }
+
+uint32_t AMQFrame::encodedSize() const {
+    uint32_t size = frameOverhead() + body->encodedSize();
+    if (body->getMethod())
+        size +=  sizeof(ClassId)+sizeof(MethodId);
+    return size;
+}
+
+uint32_t AMQFrame::frameOverhead() {
+    return 12 /*frame header*/;
+}
+
+uint16_t AMQFrame::DECODE_SIZE_MIN=4;
+
+uint16_t AMQFrame::decodeSize(char* data) {
+    Buffer buf(data+2, DECODE_SIZE_MIN);
+    return buf.getShort();
+}
+
+void AMQFrame::encode(Buffer& buffer) const
+{
+    //set track first (controls on track 0, everything else on 1):
+    uint8_t track = getBody()->type() ? 1 : 0;
+
+    uint8_t flags = (bof ? 0x08 : 0) | (eof ? 0x04 : 0) | (bos ? 0x02 : 0) | (eos ? 0x01 : 0);
+    buffer.putOctet(flags);
+    buffer.putOctet(getBody()->type());
+    buffer.putShort(encodedSize());
+    buffer.putOctet(0);
+    buffer.putOctet(0x0f & track);
+    buffer.putShort(channel);    
+    buffer.putLong(0);
+    const AMQMethodBody* method=getMethod();
+    if (method) {
+        buffer.putOctet(method->amqpClassId());
+        buffer.putOctet(method->amqpMethodId());
+    }
+    body->encode(buffer);
+}
+
+bool AMQFrame::decode(Buffer& buffer)
+{    
+    if(buffer.available() < frameOverhead())
+        return false;
+    buffer.record();
+
+    uint8_t  flags = buffer.getOctet();
+    uint8_t framing_version = (flags & 0xc0) >> 6;
+    if (framing_version != 0)
+        throw FramingErrorException(QPID_MSG("Framing version unsupported"));
+    bof = flags & 0x08;
+    eof = flags & 0x04;
+    bos = flags & 0x02;
+    eos = flags & 0x01;
+    uint8_t  type = buffer.getOctet();
+    uint16_t frame_size =  buffer.getShort();
+    if (frame_size < frameOverhead())
+        throw FramingErrorException(QPID_MSG("Frame size too small " << frame_size));    
+    uint8_t  reserved1 = buffer.getOctet();
+    uint8_t  field1 = buffer.getOctet();
+    subchannel = field1 & 0x0f;
+    channel = buffer.getShort();
+    (void) buffer.getLong(); // reserved2
+    
+    // Verify that the protocol header meets current spec
+    // TODO: should we check reserved2 against zero as well? - the
+    // spec isn't clear
+    if ((flags & 0x30) != 0 || reserved1 != 0 || (field1 & 0xf0) != 0)
+        throw FramingErrorException(QPID_MSG("Reserved bits not zero"));
+
+    // TODO: should no longer care about body size and only pass up
+    // B,E,b,e flags
+    uint16_t body_size = frame_size - frameOverhead(); 
+    if (buffer.available() < body_size){
+        buffer.restore();
+        return false;
+    }
+
+    switch(type)
+    {
+      case 0://CONTROL 
+      case METHOD_BODY: {
+          ClassId c = buffer.getOctet();
+          MethodId m = buffer.getOctet();
+          body = MethodBodyFactory::create(c, m);
+          break;
+      }
+      case HEADER_BODY: body =  BodyFactory::create<AMQHeaderBody>(); break;
+      case CONTENT_BODY: body = BodyFactory::create<AMQContentBody>(); break;
+      case HEARTBEAT_BODY: body = BodyFactory::create<AMQHeartbeatBody>(); break;
+      default:
+	throw IllegalArgumentException(QPID_MSG("Invalid frame type " << type));
+    }
+    body->decode(buffer, body_size);
+
+    return true;
+}
+
+std::ostream& operator<<(std::ostream& out, const AMQFrame& f)
+{
+    return
+        out << "Frame[" 
+            << (f.getBof() ? "B" : "") << (f.getEof() ? "E" : "")
+            << (f.getBos() ? "b" : "") << (f.getEos() ? "e" : "") << "; "
+            << "channel=" << f.getChannel() << "; " << *f.getBody()
+            << "]";
+}
+
+
+}} // namespace qpid::framing