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Preliminary 2703 BSC Support Only allows Point to Point connection. Hercules device statement : CCUU 2703 lport=port lhost=host rhost=host rport=port dial=IN|OUT|INOUT|NO [pto=nnn|0|-1] [rto=nnn|0|-1] [eto=nnn|0|-1] lport : the local TCP port number or service name on which the line will listen for incoming TCP calls This parameter is irrelevant and is ignored for DIAL=OUT for DIAL=IN|INOUT|NO, this parameter is mandatory cwlhost : The local interface IP address on which to listen. if not specified, all interfaces will be used. ex: lhost=127.0.0.1 : Only accept calls from local host lhost=192.168.0.1 : Only accept calls from hosts that can be routed through the interface that has an IP address of 192.168.0.1 If there is no 192.168.0.1 local IP address, this will fail. This parameter is irrelevant and is ignored for DIAL=OUT for DIAL=IN|INOUT|NO, this parameter is mandatory rhost : the remote host ip address or name This parameter is irrelevant and is ignored for DIAL=IN for DIAL=OUT|INOUT|NO, this parameter is mandatory rport : the remote port number or service name This parameter is irrelevant and is ignored for DIAL=IN for DIAL=OUT|INOUT|NO, this parameter is mandatory rto, pto, eto : Read, Poll and Enable Timeout values in miliseconds. specifying 0 means No Timeout (infinite wait). -1 Means immediate timeout. The read timeout is how long the handler will wait for an ending character after the last character was received or the I/O initiated. The read timeout default is 3000 Miliseconds (3 Seconds) The poll timeout is how long the handler will wait for a polled station to respond to a poll request. The poll timeout default is 3000 Miliseconds (3 Seconds) The enable timeout is how long the handler will wait for the TCP connection to be established. The enable timeout default is 10000 Miliseconds (10 Seconds), except if DIAL=NO is also specified, in which case the enable timeout defaults to 0. Note : the ETO parameter is ignored if DIAL=NO is not specified. for a dialed line, there is no enable timeout. If the eto parameter is specified and DIAL is not "NO", then a warning message is issued and the parameter is ignored. dial=IN|OUT|INOUT|NO Indicate call direction (if any). This parameter also modifies the behaviour of certain CCWS as well as TCP incoming call handling : ENABLE : DIAL=IN|DIAL=INOUT Wait forever for an incoming call DIAL=NO Completes immediatelly if a call is already present Otherwise, attemps connecting to the remote end if the call fails, ENABLE exits with Int Req status DIAL=OUT Enable is not a valid CCW for a DIALOUT only line DIAL : DIAL=IN|DIAL=NO DIAL is not a valid CCW for a DIAL IN or non-switched line DIAL=OUT|DIAL=INOUT The outgoing call is attempted Incomming TCP call : In any case, if a call is already present, the call is rejected. DIAL=NO : The call is accepted, even if no CCW is currently executing DIAL=OUT : The call is rejected DIAL=IN|DIAL=INOUT The call is accepted if the line is currently executing an ENABLE ccw. The communication protocol : The communication protocol is basic. Every character written by the guest program with a WRITE CCW is transfered to the remote end, untranslated and untouched (except for Transparent BSC rules which deem that DLE characters are doubled when the program has previously written a DLE/STX sequence). Dial data format Dial data is originally as follows : x x x x 0 0 0 0 : Dial # 0 ......... x x x x 1 0 0 1 : Dial # 9 x x x x 1 1 0 0 : EON x x x x 1 1 0 1 : SEP In order to perform an outgoing call, the data must follow these specifications : N[N[N]]SEPN[N[N]]SEPN[N[N]]SEPN[N[N]]]SEPN[..[N]][EON] Where N is any dialing number from 0 to 9 and SEP is the separator. The 4 first group of digits represet the IP address. The last group represent a TCP port number. For example (* is the SEP character representation) : 192*168*0*1*8888 : will issue a TCP connection to 192.168.0.1 port 8888 The EON is optional. If it is present, it must be the last character of the dial data. Bugs, Caveats The Address Prepare is not implemented The POLL CCW Has not been tested Group DIAL IN is not implemented DIAL CCW Not tested There is 1 thread per line, when there should be 1 thread for ALL lines. MAXDEVT may have to be adjusted under WINDOWS to accomodate for a large number of lines (because some I/O may take an undefinite amount of time). There is no 'REAL' Bsc line support yet.
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