K2Informatics.Erlnet.OtpInputStream.read4BE C# (CSharp) Method

        public int read4BE()
        {
            byte[] b = new byte[4];

            if (base.Read(b, 0, b.Length) < b.Length)
            {
                throw new OtpErlangDecodeException("Cannot read from input stream");
            }

            return (int)((b[0] << 24 & 0xff000000) + (b[1] << 16 & 0xff0000) + (b[2] << 8 & 0xff00) + (b[3] & 0xff));
        }

        protected int recvChallenge()
        {
            int challenge;

            try
            {
                byte[] buf = read2BytePackage();
                OtpInputStream ibuf = new OtpInputStream(buf, 0);
                peer.Type = ibuf.read1();
                if (peer.Type != AbstractNode.NTYPE_R6)
                {
                    throw new IOException("Unexpected peer type");
                }
                peer.DistLow = peer.DistHigh = ibuf.read2BE();
                peer.Flags = ibuf.read4BE();
                challenge = ibuf.read4BE();
                byte[] tmpname = new byte[buf.Length - 11];
                ibuf.readN(tmpname);
                String hisname = OtpErlangString.newString(tmpname);
                if (!hisname.Equals(peer.Node))
                {
                    throw new IOException("Handshake failed - peer has wrong name: " + hisname);
                }

                if ((peer.Flags & AbstractNode.dFlagExtendedReferences) == 0)
                {
                    throw new IOException("Handshake failed - peer cannot handle extended references");
                }

                if ((peer.Flags & AbstractNode.dFlagExtendedPidsPorts) == 0)
                {
                    throw new IOException("Handshake failed - peer cannot handle extended pids and ports");
                }

            }
            catch (OtpErlangDecodeException)
            {
                throw new IOException("Handshake failed - not enough data");
            }

            if (traceLevel >= handshakeThreshold)
            {
                log.Debug("<- " + "HANDSHAKE recvChallenge" + " from="
                             + peer.Node + " challenge=" + challenge + " local=" + self);
            }

            return challenge;
        }