119 lines
3.7 KiB
C++
119 lines
3.7 KiB
C++
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/*
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*
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* @APPLE_LICENSE_HEADER_START@
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*
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* Copyright (c) 1999-2008 Apple Inc. All Rights Reserved.
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*
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* This file contains Original Code and/or Modifications of Original Code
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* as defined in and that are subject to the Apple Public Source License
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* Version 2.0 (the 'License'). You may not use this file except in
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* compliance with the License. Please obtain a copy of the License at
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* http://www.opensource.apple.com/apsl/ and read it before using this
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* file.
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*
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* The Original Code and all software distributed under the License are
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* distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
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* EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
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* INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
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* Please see the License for the specific language governing rights and
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* limitations under the License.
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*
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* @APPLE_LICENSE_HEADER_END@
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*
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*/
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/*
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File: RTCPAckPacket.cpp
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Contains: RTCPAckPacket de-packetizing class
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*/
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#include "RTCPAckPacket.h"
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#include "RTCPPacket.h"
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#include "MyAssert.h"
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#include "OS.h"
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#include "OSMemory.h"
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#include "OSArrayObjectDeleter.h"
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#include <stdio.h>
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// use if you don't know what kind of packet this is
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Bool16 RTCPAckPacket::ParseAckPacket(UInt8* inPacketBuffer, UInt32 inPacketLength)
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{
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if (!this->ParseAPPPacket(inPacketBuffer, inPacketLength))
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return false;
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if (this->GetAppPacketName() == RTCPAckPacket::kAckPacketName)
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return true;
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if (this->GetAppPacketName() == RTCPAckPacket::kAckPacketAlternateName)
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return true;
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return false;
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}
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Bool16 RTCPAckPacket::ParseAPPData(UInt8* inPacketBuffer, UInt32 inPacketLength)
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{
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if ( !this->ParseAckPacket(inPacketBuffer, inPacketLength) )
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return false;
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fRTCPAckBuffer = inPacketBuffer;
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//
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// Check whether this is an ack packet or not.
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if ( (inPacketLength < kAckMaskOffset) || (!this->IsAckPacketType() ) )
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return false;
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Assert(inPacketLength == (UInt32)((this->GetPacketLength() * 4)) + RTCPPacket::kRTCPHeaderSizeInBytes);
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fAckMaskSize = inPacketLength - kAckMaskOffset;
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return true;
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}
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Bool16 RTCPAckPacket::IsAckPacketType()
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{
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// While we are moving to a new type, check for both
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UInt32 theAppType = this->GetAppPacketName();
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// if ( theAppType == kAckPacketAlternateName ) qtss_printf("ack\n");
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// if ( theAppType == kAckPacketName ) qtss_printf("qtack\n");
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return this->IsAckType(theAppType);
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}
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void RTCPAckPacket::Dump()
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{
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UInt16 theSeqNum = this->GetAckSeqNum();
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UInt16 thePacketLen = this->GetPacketLength();
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UInt32 theAckMaskSizeInBits = this->GetAckMaskSizeInBits();
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char name[5];
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name[4] = 0;
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::memcpy(name, &fRTCPAckBuffer[kAppPacketTypeOffset],4);
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UInt16 numBufferBytes = (UInt16) ( (7 * theAckMaskSizeInBits) + 1 );
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char *maskBytesBuffer = NEW char[numBufferBytes];
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OSCharArrayDeleter deleter(maskBytesBuffer);
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maskBytesBuffer[0] = 0;
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maskBytesBuffer[numBufferBytes -1] = 0;
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for (UInt32 maskCount = 0; maskCount < theAckMaskSizeInBits; maskCount++)
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{
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if (this->IsNthBitEnabled(maskCount))
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{
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qtss_sprintf(&maskBytesBuffer[::strlen(maskBytesBuffer)],"%"_U32BITARG_", ", theSeqNum + 1 + maskCount);
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}
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}
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Assert(::strlen(maskBytesBuffer) < numBufferBytes);
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qtss_printf(" H_name=%s H_seq=%u H_len=%u mask_size=%"_U32BITARG_" seq_nums_bit_set=%s\n",
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name, theSeqNum,thePacketLen,theAckMaskSizeInBits, maskBytesBuffer);
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}
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