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/*
*
* 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
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