ser2net を使う (RFC-2217 対応 COM Port Redirecter)
socat を使う (シリアル-TCP変換, etc.) で紹介した socat を使用する場合、シリアルポートの設定(ビットレート、キャラクタバイト数など)を変更することはできません。
シリアルポートの設定変更に対応したプロトコルとして RFC-2217 - Telnet Com Port Control Option というものが策定されており、それに対応したアプリケーションが ser2net です。
設定
/etc/ser2net.conf ファイルを作成・編集します。
サンプルファイルとして、/etc/ser2net.conf.example というファイルが入っていますので、それを変更して作成すると楽です。
- ser2net.conf.example
# # This is the configuration file for ser2net. It has the following format: # <TCP port>:<state>:<timeout>:<device>:<options> # TCP port # Name or number of the TCP/IP port to accept con- # nections from for this device. A port number may # be of the form [host,]port, such as 127.0.0.1,2000 # or localhost,2000. If this is specified, it will # only bind to the IP address specified. Otherwise # it will bind to all the ports on the machine. # # state Either raw or rawlp or telnet or off. off disables # the port from accepting connections. It can be # turned on later from the control port. raw enables # the port and transfers all data as-is between the # port and the long. rawlp enables the port and # transfers all input data to device, device is open # without any termios setting. It allow to use # /dev/lpX devices and printers connected to them. # telnet enables the port and runs the telnet proto- # col on the port to set up telnet parameters. This # is most useful for using telnet. # # timeout # The time (in seconds) before the port will be dis- # connected if there is no activity on it. A zero # value disables this funciton. # # device The name of the device to connect to. This # must be in the form of /dev/<device>. # # options # Sets operational parameters for the serial port. # Options 300, 1200, 2400, 4800, 9600, 19200, 38400, # 57600, 115200 set the various baud rates. EVEN, # ODD, NONE set the parity. 1STOPBIT, 2STOPBITS set # the number of stop bits. 7DATABITS, 8DATABITS set # the number of data bits. [-]XONXOFF turns on (- # off) XON/XOFF support. [-]RTSCTS turns on (- off) # hardware flow control, [-]LOCAL turns off (- on) # monitoring of the modem lines, and # [-]HANGUP_WHEN_DONE turns on (- off) lowering the # modem control lines when the connextion is done. # NOBREAK disables automatic setting of the break # setting of the serial port. # The "remctl" option allow remote control (ala RFC # 2217) of serial-port configuration. A banner name # may also be specified, that banner will be printed # for the line. If no banner is given, then no # banner is printed. # # or... # BANNER:<banner name>:banner # This will create a banner, if the banner name is given in the # options of a line, that banner will be printed. This takes the # standard "C" \x characters (\r is carraige return, \n is newline, # etc.). It also accepts \d, which prints the device name, \p, # which prints the TCP port number, and \s which prints the serial # parameters (eg 9600N81). Banners can span lines if the last # character on a line is '\'. Note that you *must* use \r\n to # start a new line. # # Note that the same device can be listed multiple times under different # ports, this allows the same serial port to have both telnet and raw # protocols. # The original config file shipped with the upstream sources can be # found in /usr/share/doc/ser2net/examples BANNER:banner:\r\nser2net port \p device \d [\s] (Debian GNU/Linux)\r\n\r\n 2000:telnet:600:/dev/ttyS0:9600 8DATABITS NONE 1STOPBIT banner 2001:telnet:600:/dev/ttyS1:9600 8DATABITS NONE 1STOPBIT banner 3000:telnet:600:/dev/ttyS0:19200 8DATABITS NONE 1STOPBIT banner 3001:telnet:600:/dev/ttyS1:19200 8DATABITS NONE 1STOPBIT banner
ドライバ
Windows からアクセスするためのドライバもあります。
HW VSP3
Features (抜粋)
- Free, unrestricted Virtual Serial Port driver for any TCP/IP devices
- Compatible with Windows 2000, XP (Win 98, NT), Windows 8 & even 32-bit or 64 bit.
- Runs as a standalone application, or as a NT service suitable for servers
- This software is FREEWARE, as long as you comply with the license terms and conditions
64bit にも対応しているという点がいいですね。