m4/hub4com: HUB for communications. Brought to you by: vfrol

to eliminate this problembut CVSNT does not allow specifying the port for using the SSH. To eliminatethis problem (for your-progect，EmuBR=yes -command install 2 PortName=COM4， CNCB0，%H4C_TCP_SERVER_PORT%， I want to be sure that the printer continues to print data also in case that the TCP client is switched off (or disconnected from the network). How to do it?A. The following config script allows- create a TCP connection to the printer when needed instead of using a"permanent" TCP connection.- suspend a printing job till the job will cancelled by user or tillconnection to the printer or from TCP client on networked PC willestablished.- repeate each minute tries to create a TCP connection to the printer tillthere is a printing job.Copy and paste the following script to a command file (.bat) or to the console:::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::: Set parameters:SET PRINTER_SERIAL_PORT=COM3SET H4C_SERIAL_PORT=CNCB0SET H4C_TCP_SERVER_PORT=5555SET H4C_TCP_CLIENT_ADDR=172.16.32.12:: Set required flow control on the printer's side:mode com4 octs=on odsr=on dtr=on rts=on:: Set config file path for hub4com to this bat-file or console:SET H4C_CONFIG_FILE="\"%~f0\""GOTO END_SET_H4C_CONFIG_FILESET H4C_CONFIG_FILE="":END_SET_H4C_CONFIG_FILE:: Start hub4com:hub4com --load=%H4C_CONFIG_FILE%，EmuBR=yes -command install 1 PortName=COM3，EmuBR=yes - 2. Start the multiplexer.bat on the Server computer:multiplexer --secret "any secret phrase" --link-type tcp 5555 --mode server CNCB1 CNCB2 CNCB3 3. Start the multiplexer.bat on the Client computer:multiplexer --secret "any secret phrase" --link-type tcp serial.server.addr:5555 CNCB1 CNCB2 CNCB3FAQs HOWTOs=============Q. The com2tcp.bat，_CUT_THIS_LINE_" from my.txt file.Now the folloving two command lines are equal:multiplexer --baud 115200 COM1 CNCB1 CNCB2 CNCB3hub4com --load=my.txt， COM3 and COM4.You'd like to use COM2， CNCB0 and CNCB1 ports:hub4com \\.\COM1 \\.\CNCB0 \\.\CNCB1It will send data received from COM1 port to CNCB0 and CNCB1 portsand it will send data received from CNCB0 port to COM1 port. 3. Start the GPS applications on COM5 and COM6 ports.COM port to telnet redirector-----------------------------You have old TERM95.EXE application from the Norton Commander 5.0 forMS-DOS and you'd like to use it to communicate with your.telnet.servertelnet server. You can do so this way: 1. With the com0com's Setup Command Prompt create COM2-CNCB0 virtualCOM port pair (see com0com's ReadMe.txt for more info). For example:command install 0 PortName=COM2 - 2. Start the com2tcp.bat on CNCB0 port. For example:com2tcp --telnet \\.\CNCB0 your.telnet.server telnet 3. Start the TERM95.EXE on COM2 port.BTW: com2tcp.bat is a wrapper to hub4com.exe. It works very similar tothe "COM port to TCP redirector" (com2tcp). It supports allcom2tcp's options. If you feel that com2tcp is what you need butcan't find any required functionality (for example RFC 2217 support)then try use hub4com instead.RFC 2217 server (TCP to COM port redirector)--------------------------------------------You have a server computer with phisical COM1 port and you'd like to share itthrough the network by the RFC 2217 "Telnet Com Port Control Option" protocol: 1. Start the com2tcp-rfc2217.bat on COM1 port. For example:com2tcp-rfc2217 COM1 7000 It will listen TCP/IP port 7000 for incaming connections and redirect them to COM1 port.RFC 2217 client (COM port to TCP redirector)--------------------------------------------You have a server computer your.comport.server with phisical serial portshared through the network by the RFC 2217 protocol (see above example) andyou'd like to use it on the client computer like a virtual serial port. 1. With the com0com's Setup Command Prompt create COM5-CNCB0 virtualCOM port pair (see com0com's ReadMe.txt for more info). For example:command install 0 PortName=COM5， at the same time， modify and send it to anumber of ports and vice versa.In conjunction with the com0com driver the hub4com allows to - handle data and signals from a single real serial device by a number ofdifferent applications. For example， developername and modulename): 1. Start the hub4com.exe:hub4com.exe --use-driver=tcp your-progect.cvs.sourceforge.net:443 --interface=localhost /22 2. Check out the souce code from the CVS repository:cvs -z3 -d:ssh:developername@localhost:/cvsroot/your-progect co -P modulenameMultiplexing------------You have a client computer that has a serial port COM1 and a servercomputer that has four serial ports COM1， COM3 and COM4. Bothcomputers linked each other by null-modem cable between their COM1 ports.There are not any other connections between the computers. You'd like touse COM2，%H4C_TCP_CLIENT_ADDR%:: Skip config for hub4com if something is wrong:GOTO ENDfind "blah blah blah":: Config for hub4com:_BEGIN_H4C_# Enable route data and signals# - from SERIAL(0) to TCP(1) and TCP(2)# - from TCP(1) to SERIAL(0)# - from TCP(2) to SERIAL(0)# Enable route flow control# - from TCP(1) and TCP(2) to SERIAL(0)#--bi-route=0:1，_END_Q. We've been using and experimenting with hub4com and came to the conclusion that if you use a real com port in it，_BEGIN_， CNCB1， CNCB1 and CNCB2 ports:hub4com --route=All:All \\.\CNCB0 \\.\CNCB1 \\.\CNCB2 3. Start the HyperTerminal on CNCA0 port. 4. Start the HyperTerminal on CNCA1 port. 5. Start the HyperTerminal on CNCA2 port. 6. The data typed to any HyperTerminal window should be printed onthe others HyperTerminal windows.EXAMPLES OF USAGE=================GPS hub-------You have a GPS device that connected to your computer via a phisical COM1port and you'd like to handle its data by two GPS applications. You cando it this way: 1. With the com0com's Setup Command Prompt create COM5-CNCB0 andCOM6-CNCB1 virtual COM port pairs (see com0com's ReadMe.txt formore info). For example:command install 0 PortName=COM5 -command install 1 PortName=COM6 - 2. Start the hub4com.exe on COM1，EmuBR=yes - 2. Start the com2tcp-rfc2217.bat on CNCB0 port. For example:com2tcp-rfc2217 \\.\CNCB0 your.comport.server 7000 It will redirect virtual serial port COM5 on the second computer to the phisical serial port on the first computer.CHAT server-----------You'd like by using computer with address your.computer.addr to allow upto 5 users to chat by using ordinary telnet application. 1. Start the hub4com.exe on the computer with address your.computer.addr:hub4com --load=， COM3 and COM4 of the server computer like if they exist on theclient computer:----------------------------------------------------------|Client computer || Server computer |||||| app1 -- COM2 (virtual) --| null-modem |-- COM2 ---|\| cable |/|| app2 -- COM3 (virtual) ----- COM1 -------------- COM1 ----- COM3 ---|/||\|| app3 -- COM4 (virtual) --||-- COM4 ------------------------------------------------------------

_BEGIN_H4C_， COM3 and COM4 of the server computer like if theyexist on the client computer and use the server computer's TCP/IP portserial.server.addr:5555 for this. Additionally you'd like to encrypt TCP/IPtraffic to protect the private data from others:--------------------------------------------------------|Client computer || Server computer|||| (serial.server.addr) |||||| app1 -- COM2 (virtual) -- ||-- COM2 -----|\ || port/|| app2 -- COM3 (virtual) ----------TCP/IP----- 5555-------- COM3 -----|/ ||\|| app3 -- COM4 (virtual) -- ||-- COM4 ------------------------------------------------------------

several applications can share datafrom one GPS device; - use real serial ports of remote computer like if they exist on the localcomputer.The homepage for com0com project is TESTING======= 1. With the com0com driver create three virtual COM port pairs withport names CNCA0。

-------multiplexed-------||-------------RFC 2217-------------| 1. With the com0com's Setup Command Prompt on client computer createCOM2-CNCB0。

_CUT_THIS_LINE_multiplexer --baud 115200 COM1 CNCB1 CNCB2 CNCB3 my.txt2. Cut line "--create-filter=trace，2 \\.\CNCB0 --use-driver=tcp *5555 *172.16.32.12:9100In this way it seems to me that everything works as desired: when the printer closes the TCP connection the hub4com immediately opens a new one.How to create a TCP connection when needed instead of using a "permanent" TCP connection w/o a risk to lose some bytes of data when hub4com (re)create the TCP connection to the printer?I want to be sure that the TCP client on networked PC continues to get data also in case that the printer is switched off (or disconnected from the network) and，。

2## The DTR should be in raised state on the SERIAL(0)# if TCP(1) or TCP(2) or both are in connected state# The DTR should be in not raised state on the SERIAL(0)# if TCP(1) and TCP(2) are in not connected state#--create-filter=pinmap:--dtr=connect--add-filters=0:pinmap## (re)connect TCP(2) only when the DSR on the SERIAL(0)# is in raised state#--create-filter=pin2con:--connect=dsr--add-filters=0:pin2con## Disable writing data to the SERIAL(0)#--write-limit=0## Serial SERIAL(0)#\\.\%%1%%## Restore write queue limit#--write-limit=256#--use-driver=tcp## Server TCP(1)#*%%2%%## Set write queue limit to a big enough value for TCP(2) to# minimize delays while connection procedure is in progress# (it's optional)# --write-limit=2048## Do reconnect TCP(2) each minute till there is# a job for printing (the DSR on the SERIAL(0)# is in raised state)#--reconnect=60000## Client TCP(2) to JetDirect server#%%3%%:9100#_END_H4C_find "blah blah blah":END::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::Press CTRL+C:::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::: ， com2tcp-rfc2217.bat and multiplexer.bat are a wrappers to the hub4com.exe. How to convert wrapper's command line to a file with arguments for hub4com.exe?A. The file can be created by seting OPTIONS variable， for example:1. Convert multiplexer.bat's command line to the my.txt file:SET OPTIONS=--create-filter=trace， COM3-CNCB1 and COM4-CNCB2 virtual serial portpairs (see com0com's ReadMe.txt for more info). For example:command install 0 PortName=COM2，_END_--create-filter=telnet--add-filters=All:telnet--route=All:All--use-driver=tcp*5555*5555*5555*5555*5555_END_ 2. Now users can join to the chat by connecting to port 5555 of yourcomputer. For example:telnet your.computer.addr 5555CVS pserver proxy-----------------You have a computer that has not access to the internet and you'd like toallow it to access to hub4com's CVS repository by using proxy computerwith address your.computer.addr. 1. Start the hub4com.exe on the computer with address your.computer.addr:hub4com.exe --use-driver=tcp /2401 com0com.cvs.sourceforge.net:2401 2. On computer that has not access to the internet check out the hub4comsouce code from the CVS repository:cvs -d:pserver:anonymous@your.computer.addr:/cvsroot/com0com logincvs -z3 -d:pserver:anonymous@your.computer.addr:/cvsroot/com0com co -P hub4comCVS ssh to https proxy----------------------You have a computer that is behind firewall which block traffic on the SSHports used to access SourceForge CVS servers for developers. SourceForgeprovides SSH access to CVS servers using port 443，EmuBR=yes -command install 2 PortName=COM4，EmuBR=yes -command install 1 PortName=COM3， CNCA2 and CNCB2 (seecom0com's ReadMe.txt file for details). 2. Start the hub4com.exe on CNCB0， COM2，EmuBR=yes - 2. Start the multiplexer.bat on the Server computer:multiplexer --baud 115200 COM1 --mode server CNCB1 CNCB2 CNCB3 3. Start the multiplexer.bat on the Client computer:multiplexer --baud 115200 COM1 CNCB1 CNCB2 CNCB3Encryption----------You have a server computer that has three serial ports COM2， CNCA1，_END_H4C_:%H4C_SERIAL_PORT%。

-encrypted--||---multiplexed-----------||--------RFC 2217-----------------| 1. With the com0com's Setup Command Prompt on client computer createCOM2-CNCB0， COM3-CNCB1 and COM4-CNCB2 virtual serial portpairs (see com0com's ReadMe.txt for more info). For example:command install 0 PortName=COM2，， the real com port won't receive anything from the other loopback ports. Is there some trick to getting a physical com port to accept data with hub4com?A. By default hub4com use CTS handshaking on output so if CTS state is OFF then no any data can be sent to the port. To disable CTS handshaking add --octs=off option before real com port.Q. This is my config: A com0com virtual null modem (COM3CNCB0) is used to get input data from the Windows "Generic Text Only" printer (configured on virtual COM4). After this I used hub4com to "split" the ASCII stream in 2 data paths: one stream goes to a dot matrix printer connected via Ethernet (hub4com creates a TCP client that connect to Jetdirect port 9100 of the printer) and the other one is used for a local TCP server on port 5555 (hub4com create a TCP server that will be used by a TCP client on networked PC to collect the same data printed on paper). This is the hub4com command-line:hub4com.exe --route=0:1， ================================HUB for communications (hub4com)================================INTRODUCTION============The HUB for communications (hub4com) is a Windows application and is a part ofthe com0com project.It allows to receive data and signals from one port。