Exemplo n.º 1
0
        private ReConfigChunk makeSSNResets()
        {
            ReConfigChunk reply = new ReConfigChunk(); // create a new thing
            //logger.LogDebug($"SCTP closing {listOfStreamsToReset.Count} stream.");
            List <int> streamsL = new List <int>();

            lock (listOfStreamsToReset)
            {
                foreach (var s in listOfStreamsToReset)
                {
                    if (s.InboundIsOpen())
                    {
                        streamsL.Add(s.getNum());
                    }
                }
            }

            int[] streams = streamsL.ToArray();
            if (streams.Length > 0)
            {
                OutgoingSSNResetRequestParameter rep =
                    new OutgoingSSNResetRequestParameter(nextNearNo(), farSeqno - 1, assoc.getNearTSN());
                rep.setStreams(streams);
                reply.addParam(rep);
            }

            streamsL.Clear();
            lock (listOfStreamsToReset)
            {
                foreach (var s in listOfStreamsToReset)
                {
                    if (s.OutboundIsOpen())
                    {
                        streamsL.Add(s.getNum());
                    }
                }
            }

            streams = streamsL.ToArray();
            if (streams.Length > 0)
            {
                IncomingSSNResetRequestParameter rep = new IncomingSSNResetRequestParameter(nextNearNo());
                rep.setStreams(streams);
                reply.addParam(rep);
            }

            //logger.LogDebug("reconfig chunk is " + reply.ToString());
            return(reply);
        }
Exemplo n.º 2
0
        protected VariableParam readVariable()
        {
            int type = _body.GetUShort();
            int len  = _body.GetUShort();
            int blen = len - 4;
            //byte[] data;
            Unknown var;

            switch (type)
            {
            case 1:
                var = new HeartbeatInfo(1, "HeartbeatInfo");
                break;

            //      2-4	Unassigned
            case 5:
                var = new IPv4Address(5, "IPv4Address");
                break;

            case 6:
                var = new IPv6Address(6, "IPv6Address");
                break;

            case 7:
                var = new StateCookie(7, "StateCookie");
                break;

            case 8:
                var = new UnrecognizedParameters(8, "UnrecognizedParameters");
                break;

            case 9:
                var = new CookiePreservative(9, "CookiePreservative");
                break;

            //      10	Unassigned
            case 11:
                var = new HostNameAddress(11, "HostNameAddress");
                break;

            case 12:
                var = new SupportedAddressTypes(12, "SupportedAddressTypes");
                break;

            case 13:
                var = new OutgoingSSNResetRequestParameter(13, "OutgoingSSNResetRequestParameter");
                break;

            case 14:
                var = new IncomingSSNResetRequestParameter(14, "IncomingSSNResetRequestParameter");
                break;

            case 15:
                var = new SSNTSNResetRequestParameter(15, "SSNTSNResetRequestParameter");
                break;

            case 16:
                var = new ReconfigurationResponseParameter(16, "ReconfigurationResponseParameter");
                break;

            case 17:
                var = new AddOutgoingStreamsRequestParameter(17, "AddOutgoingStreamsRequestParameter");
                break;

            case 18:
                var = new AddIncomingStreamsRequestParameter(18, "AddIncomingStreamsRequestParameter");
                break;

            //      19-32767	Unassigned
            case 32768:
                var = new Unknown(32768, "ReservedforECNCapable");
                break;

            case 32770:
                var = new RandomParam(32770, "Random");
                break;

            case 32771:
                var = new ChunkListParam(32771, "ChunkList");
                break;

            case 32772:
                var = new RequestedHMACAlgorithmParameter(32772, "RequestedHMACAlgorithmParameter");
                break;

            case 32773:
                var = new Unknown(32773, "Padding");
                break;

            case 32776:
                var = new SupportedExtensions(32776, "SupportedExtensions");
                break;

            //      32777-49151	Unassigned
            case 49152:
                var = new ForwardTSNsupported(49152, "ForwardTSNsupported");
                break;

            case 49153:
                var = new Unknown(49153, "AddIPAddress");
                break;

            case 49154:
                var = new Unknown(49154, "DeleteIPAddress");
                break;

            case 49155:
                var = new Unknown(49155, "ErrorCauseIndication");
                break;

            case 49156:
                var = new Unknown(49156, "SetPrimaryAddress");
                break;

            case 49157:
                var = new Unknown(49157, "SuccessIndication");
                break;

            case 49158:
                var = new Unknown(49158, "AdaptationLayerIndication");
                break;

            default:
                var = new Unknown(-1, "Unknown");
                break;
            }
            try
            {
                var.readBody(_body, blen);
                //logger.LogDebug("variable type " + var.getType() + " name " + var.getName());
            }
            catch (SctpPacketFormatException ex)
            {
                logger.LogError(ex.ToString());
            }
            if (_body.hasRemaining())
            {
                int mod = blen % 4;
                if (mod != 0)
                {
                    for (int pad = mod; pad < 4; pad++)
                    {
                        _body.GetByte();
                    }
                }
            }
            return(var);
        }
Exemplo n.º 3
0
        /*
         * https://tools.ietf.org/html/rfc6525
         */
        public Chunk[] deal(ReConfigChunk rconf)
        {
            Chunk[]       ret   = new Chunk[1];
            ReConfigChunk reply = null;

            //logger.LogDebug("Got a reconfig message to deal with");
            if (haveSeen(rconf))
            {
                // if not - is this a repeat
                reply = getPrevious(rconf); // then send the same reply
            }
            if (reply == null)
            {
                // not a repeat then
                reply = new ReConfigChunk(); // create a new thing
                if (rconf.hasOutgoingReset())
                {
                    OutgoingSSNResetRequestParameter oreset = rconf.getOutgoingReset();
                    int[] streams = oreset.getStreams();
                    if (streams.Length == 0)
                    {
                        streams = assoc.allStreams();
                    }
                    if (timerIsRunning())
                    {
                        markAsAcked(rconf);
                    }
                    // if we are behind, we are supposed to wait until we catch up.
                    if (oreset.getLastAssignedTSN() > assoc.getCumAckPt())
                    {
                        //logger.LogDebug("Last assigned > farTSN " + oreset.getLastAssignedTSN() + " v " + assoc.getCumAckPt());
                        foreach (int s in streams)
                        {
                            SCTPStream defstr = assoc.getStream(s);
                            // AC: All this call did was set an unused local variable. Removed for now.
                            //defstr.setDeferred(true);
                        }
                        ReconfigurationResponseParameter rep = new ReconfigurationResponseParameter();
                        rep.setSeq(oreset.getReqSeqNo());
                        rep.setResult(ReconfigurationResponseParameter.IN_PROGRESS);
                        reply.addParam(rep);
                    }
                    else
                    {
                        // somehow invoke this when TSN catches up ?!?! ToDo
                        //logger.LogDebug("we are up-to-date ");
                        ReconfigurationResponseParameter rep = new ReconfigurationResponseParameter();
                        rep.setSeq(oreset.getReqSeqNo());
                        int result = streams.Length > 0 ? ReconfigurationResponseParameter.SUCCESS_PERFORMED : ReconfigurationResponseParameter.SUCCESS_NOTHING_TO_DO;
                        rep.setResult((uint)result); // assume all good
                        foreach (int s in streams)
                        {
                            SCTPStream cstrm = assoc.delStream(s);
                            if (cstrm == null)
                            {
                                //logger.LogError("Close a non existant stream");
                                rep.setResult(ReconfigurationResponseParameter.ERROR_WRONG_SSN);
                                break;
                                // bidriectional might be a problem here...
                            }
                            else
                            {
                                cstrm.reset();
                            }
                        }
                        reply.addParam(rep);
                    }
                }
                // ponder putting this in a second chunk ?
                if (rconf.hasIncomingReset())
                {
                    IncomingSSNResetRequestParameter ireset = rconf.getIncomingReset();

                    /*The Re-configuration
                     *                  Response Sequence Number of the Outgoing SSN Reset Request
                     *                  Parameter MUST be the Re-configuration Request Sequence Number
                     *                  of the Incoming SSN Reset Request Parameter. */
                    OutgoingSSNResetRequestParameter rep = new OutgoingSSNResetRequestParameter(nextNearNo(), ireset.getReqNo(), assoc.getNearTSN());
                    int[] streams = ireset.getStreams();
                    rep.setStreams(streams);
                    if (streams.Length == 0)
                    {
                        streams = assoc.allStreams();
                    }
                    foreach (int s in streams)
                    {
                        SCTPStream st = assoc.getStream(s);
                        if (st != null)
                        {
                            st.setClosing(true);
                        }
                    }
                    reply.addParam(rep);
                    // set outbound timer running here ???
                    //logger.LogDebug("Ireset " + ireset);
                }
            }
            if (reply.hasParam())
            {
                ret[0] = reply;
                // todo should add sack here
                //logger.LogDebug("about to reply with " + reply.ToString());
            }
            else
            {
                ret = null;
            }
            return(ret);
        }
Exemplo n.º 4
0
 public bool sameAs(IncomingSSNResetRequestParameter other)
 {
     return(this.reqSeqNo == other.reqSeqNo);
 }