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| 1 /***************************************************************************** | |
| 2 Copyright (c) 2001 - 2011, The Board of Trustees of the University of Illinois. | |
| 3 All rights reserved. | |
| 4 | |
| 5 Redistribution and use in source and binary forms, with or without | |
| 6 modification, are permitted provided that the following conditions are | |
| 7 met: | |
| 8 | |
| 9 * Redistributions of source code must retain the above | |
| 10 copyright notice, this list of conditions and the | |
| 11 following disclaimer. | |
| 12 | |
| 13 * Redistributions in binary form must reproduce the | |
| 14 above copyright notice, this list of conditions | |
| 15 and the following disclaimer in the documentation | |
| 16 and/or other materials provided with the distribution. | |
| 17 | |
| 18 * Neither the name of the University of Illinois | |
| 19 nor the names of its contributors may be used to | |
| 20 endorse or promote products derived from this | |
| 21 software without specific prior written permission. | |
| 22 | |
| 23 THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS | |
| 24 IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, | |
| 25 THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR | |
| 26 PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR | |
| 27 CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, | |
| 28 EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, | |
| 29 PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR | |
| 30 PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF | |
| 31 LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING | |
| 32 NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS | |
| 33 SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. | |
| 34 *****************************************************************************/ | |
| 35 | |
| 36 /***************************************************************************** | |
| 37 written by | |
| 38 Yunhong Gu, last updated 01/22/2011 | |
| 39 *****************************************************************************/ | |
| 40 | |
| 41 #ifndef __UDT_WINDOW_H__ | |
| 42 #define __UDT_WINDOW_H__ | |
| 43 | |
| 44 | |
| 45 #ifndef WIN32 | |
| 46 #include <sys/time.h> | |
| 47 #include <time.h> | |
| 48 #endif | |
| 49 #include "udt.h" | |
| 50 | |
| 51 | |
| 52 class CACKWindow | |
| 53 { | |
| 54 public: | |
| 55 CACKWindow(const int& size = 1024); | |
| 56 ~CACKWindow(); | |
| 57 | |
| 58 // Functionality: | |
| 59 // Write an ACK record into the window. | |
| 60 // Parameters: | |
| 61 // 0) [in] seq: ACK seq. no. | |
| 62 // 1) [in] ack: DATA ACK no. | |
| 63 // Returned value: | |
| 64 // None. | |
| 65 | |
| 66 void store(const int32_t& seq, const int32_t& ack); | |
| 67 | |
| 68 // Functionality: | |
| 69 // Search the ACK-2 "seq" in the window, find out the DATA "ack" and ca
luclate RTT . | |
| 70 // Parameters: | |
| 71 // 0) [in] seq: ACK-2 seq. no. | |
| 72 // 1) [out] ack: the DATA ACK no. that matches the ACK-2 no. | |
| 73 // Returned value: | |
| 74 // RTT. | |
| 75 | |
| 76 int acknowledge(const int32_t& seq, int32_t& ack); | |
| 77 | |
| 78 private: | |
| 79 int32_t* m_piACKSeqNo; // Seq. No. for the ACK packet | |
| 80 int32_t* m_piACK; // Data Seq. No. carried by the ACK packet | |
| 81 uint64_t* m_pTimeStamp; // The timestamp when the ACK was sent | |
| 82 | |
| 83 int m_iSize; // Size of the ACK history window | |
| 84 int m_iHead; // Pointer to the lastest ACK record | |
| 85 int m_iTail; // Pointer to the oldest ACK record | |
| 86 | |
| 87 private: | |
| 88 CACKWindow(const CACKWindow&); | |
| 89 CACKWindow& operator=(const CACKWindow&); | |
| 90 }; | |
| 91 | |
| 92 //////////////////////////////////////////////////////////////////////////////// | |
| 93 | |
| 94 class CPktTimeWindow | |
| 95 { | |
| 96 public: | |
| 97 CPktTimeWindow(const int& asize = 16, const int& psize = 16); | |
| 98 ~CPktTimeWindow(); | |
| 99 | |
| 100 // Functionality: | |
| 101 // read the minimum packet sending interval. | |
| 102 // Parameters: | |
| 103 // None. | |
| 104 // Returned value: | |
| 105 // minimum packet sending interval (microseconds). | |
| 106 | |
| 107 int getMinPktSndInt() const; | |
| 108 | |
| 109 // Functionality: | |
| 110 // Calculate the packes arrival speed. | |
| 111 // Parameters: | |
| 112 // None. | |
| 113 // Returned value: | |
| 114 // Packet arrival speed (packets per second). | |
| 115 | |
| 116 int getPktRcvSpeed() const; | |
| 117 | |
| 118 // Functionality: | |
| 119 // Estimate the bandwidth. | |
| 120 // Parameters: | |
| 121 // None. | |
| 122 // Returned value: | |
| 123 // Estimated bandwidth (packets per second). | |
| 124 | |
| 125 int getBandwidth() const; | |
| 126 | |
| 127 // Functionality: | |
| 128 // Record time information of a packet sending. | |
| 129 // Parameters: | |
| 130 // 0) currtime: timestamp of the packet sending. | |
| 131 // Returned value: | |
| 132 // None. | |
| 133 | |
| 134 void onPktSent(const int& currtime); | |
| 135 | |
| 136 // Functionality: | |
| 137 // Record time information of an arrived packet. | |
| 138 // Parameters: | |
| 139 // None. | |
| 140 // Returned value: | |
| 141 // None. | |
| 142 | |
| 143 void onPktArrival(); | |
| 144 | |
| 145 // Functionality: | |
| 146 // Record the arrival time of the first probing packet. | |
| 147 // Parameters: | |
| 148 // None. | |
| 149 // Returned value: | |
| 150 // None. | |
| 151 | |
| 152 void probe1Arrival(); | |
| 153 | |
| 154 // Functionality: | |
| 155 // Record the arrival time of the second probing packet and the interva
l between packet pairs. | |
| 156 // Parameters: | |
| 157 // None. | |
| 158 // Returned value: | |
| 159 // None. | |
| 160 | |
| 161 void probe2Arrival(); | |
| 162 | |
| 163 private: | |
| 164 int m_iAWSize; // size of the packet arrival history window | |
| 165 int* m_piPktWindow; // packet information window | |
| 166 int* m_piPktReplica; | |
| 167 int m_iPktWindowPtr; // position pointer of the packet info. window. | |
| 168 | |
| 169 int m_iPWSize; // size of probe history window size | |
| 170 int* m_piProbeWindow; // record inter-packet time for probing packet p
airs | |
| 171 int* m_piProbeReplica; | |
| 172 int m_iProbeWindowPtr; // position pointer to the probing window | |
| 173 | |
| 174 int m_iLastSentTime; // last packet sending time | |
| 175 int m_iMinPktSndInt; // Minimum packet sending interval | |
| 176 | |
| 177 uint64_t m_LastArrTime; // last packet arrival time | |
| 178 uint64_t m_CurrArrTime; // current packet arrival time | |
| 179 uint64_t m_ProbeTime; // arrival time of the first probing packet | |
| 180 | |
| 181 private: | |
| 182 CPktTimeWindow(const CPktTimeWindow&); | |
| 183 CPktTimeWindow &operator=(const CPktTimeWindow&); | |
| 184 }; | |
| 185 | |
| 186 | |
| 187 #endif | |
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