sctp-cmt.h
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- /*
- * Copyright (c) 2006-2007 by the Protocol Engineering Lab, U of Delaware
- * All rights reserved.
- *
- * Protocol Engineering Lab web page : http://pel.cis.udel.edu/
- *
- * Paul D. Amer <amer@@cis,udel,edu>
- * Janardhan R. Iyengar <iyengar@@cis,udel,edu>
- * Preethi Natarajan <nataraja@@cis,udel,edu>
- * Nasif Ekiz <nekiz@@cis,udel,edu>
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- *
- * 1. Redistributions of source code must retain the above copyright
- * notice, this list of conditions and the following disclaimer.
- *
- * 2. Redistributions in binary form must reproduce the above copyright
- * notice, this list of conditions and the following disclaimer in the
- * documentation and/or other materials provided with the distribution.
- *
- * 3. Neither the name of the University nor of the Laboratory may be used
- * to endorse or promote products derived from this software without
- * specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
- * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
- * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
- * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
- * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
- * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
- * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
- * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
- * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
- * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
- * SUCH DAMAGE.
- */
- /* Concurrent Multipath Transfer extension: To allow SCTP to correctly use
- * multiple paths available at the transport.
- */
- #ifndef ns_sctp_cmt_h
- #define ns_sctp_cmt_h
- #include "agent.h"
- #include "node.h"
- #include "packet.h"
- #include "sctp.h"
- /* CMT rtx policies
- */
- typedef enum CmtRtxPolicy_E
- {
- RTX_ASAP,
- RTX_TO_SAME,
- RTX_SSTHRESH,
- RTX_LOSSRATE,
- RTX_CWND
- };
- class SctpCMTAgent : public virtual SctpAgent
- {
- public:
- SctpCMTAgent();
- void Timeout(SctpChunkType_E, SctpDest_S*);
- void SackGenTimerExpiration();
-
- protected:
- void delay_bind_init_all();
- int delay_bind_dispatch(const char *varName, const char *localName,
- TclObject *tracer);
- /* initialization stuff
- */
- void OptionReset();
- void Reset();
- /* tracing functions
- */
- void TraceAll();
- void TraceVar(const char*);
- void trace(TracedVar*);
-
- /* sending functions
- */
- void AddToSendBuffer(SctpDataChunkHdr_S *, int, u_int, SctpDest_S *);
- int GenChunk(SctpChunkType_E, u_char *);
- void SendBufferDequeueUpTo(u_int);
- void FastRtx();
- Boolean_E AnyMarkedChunks();
- void MarkChunkForRtx(SctpSendBufferNode_S *, MarkedForRtx_E);
- void RtxMarkedChunks(SctpRtxLimit_E);
- void recv(Packet *pkt, Handler*);
- void SendMuch();
-
- /* processing functions
- */
- Boolean_E ProcessGapAckBlocks(u_char *, Boolean_E);
- void ProcessSackChunk(u_char *);
- int ProcessChunk(u_char *, u_char **);
- u_int GetHighestOutstandingTsn(SctpDest_S *);
- void HeartbeatGenTimerExpiration(double);
- /* new CMT functions
- */
- SctpDest_S* SelectRtxDest(SctpSendBufferNode_S*, SctpRtxLimit_E);
- void SetSharedCCParams(SctpDest_S*);
- char* PrintDestStatus(SctpDest_S*);
- /* new CMT-PF function
- */
- SctpDest_S* SelectFromPFDests();
- /******* Variables *******/
-
- /* JRI-TODO: Take out options for SFR and CUC algos.
- */
- Boolean_E eUseCmtReordering; // use CMT's reordering algo? (was CACC)
- Boolean_E eUseCmtCwnd; // use CMT's cwnd growth algo?
- Boolean_E eUseCmtDelAck; // use CMT's delayed ack algo?
- /* Variables for CMT delayed ack algo
- */
- u_int uiNumPacketsSacked; // number of packets acked by SACK (sack->flags)
- u_int uiNumDestsSacked; // number of dests acked by SACK (inferred)
- CmtRtxPolicy_E eCmtRtxPolicy;
- /* CMT-PF: Use the possibly failed state in RTX_SSTHRESH policy?
- */
- Boolean_E eUseCmtPF;
- /* CMT-PF: Value for Cwnd when PF path becomes ACTIVE again.
- */
- u_int uiCmtPFCwnd;
- /* CMT-PF: Track last adv rwnd
- */
- u_int uiArwnd;
- /* CMT-PF: Trace variables
- */
- TracedInt tiCountPFToActiveNewData; // Count of PF->Active state changes
- // for new data (in SendMuch)
- TracedInt tiCountPFToActiveRtxms; // Count of PF->Active state changes
- // for retransmissions (in SelectRtxDest)
- };
- #endif