BugWorkShop - 甲蟲工作室: DIY - 智能小車：ser2net 詳細介紹 (二十一)

DIY - 智能小車：ser2net 詳細介紹 (二十一)：

智能小車的無線路由器收發資料需要傳送到 16F877A 作處理，而兩者的連接是利用串行口（Serial Port）來實現，無線路由器的 OperWRT 也安裝了一個 ser2net 程式，ser2net（Serial to network proxy）是為用戶提供了一個網絡到串口的進程，從網絡指定的 TCP 端口連接到串行端口，一旦連接發生，用戶便可以利用網絡收發資料，ser2net 是基於 GNU （General Public License version 2.0 GPLv2）許可協議發行。

程式句法：

ser2net [-c configfile] [-C configline] [-p controlport] [-n] [-d] [-b] [-v] [-P pidfile]

Options	Description
-c config-file	Set the configuration file to one other than the default of /etc/ser2net.conf
-C config-line	Handle a single configuration line. This may be specified multiple times for multiple lines. This is just like a line in the config file. This disables the default config file, you must specify a -c after the last -C to have it read a config file, too.
-n	Stops the daemon from forking and detaching from the controlling terminal. This is useful for running from init.
-d	Like -n, but also sends the system logs to standard output. This is most useful for debugging purposes.
-P pidfile	If specified, put the process id (pid) of ser2net in the pidfile, replacing whatever was in that file previously. A pidfile is not created by default, you must specify this to create one. Note also that this filename must be specific with the full path, as ser2net will change directory to "/" when it becomes a daemon. when it
-u	If UUCP locking is enabled, this will disable the use of UUCP locks.
-b	Cisco IOS uses a different mechanism for specifying the baud rates than the mechanism described in RFC2217. This option sets the IOS version of setting the baud rates. The default is RFC2217's.
-v	Prints the version of the program and exits.
-p controlport	Enables the control port and sets the TCP port to listen to for the control port. 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 for the port. Otherwise, it will bind to all the addresses on the machine. If the port number is zero, that means that standard in/out will be used for the only input/output, and only one port should be specified in the config. This way, it can be used from inetd.

控制端口（Control Port）

控制端口提供一個簡單的控制端口和查看端口的狀態，控制端口有以下命令：

Control Port	Description
showport []	Show information about a port. If no port is given, all ports are displayed.
showshortport []	Show information about a port, each port on one line. If no port is given, all ports are displayed. This can produce very wide output.
help	Display a short list and summary of commands.
exit	Disconnect from the control port.
version	Display the version of this program.
monitor	Display all the input for a given port on the calling control port. Only one direction may be monitored at a time. The type field may be tcp or term and specifies whether to monitor data from the TCP port or from the serial port Note that data monitoring is best effort, if the controller port cannot keep up the data will be silently dropped. A controller may only monitor one thing and a port may only be monitored by one controller.
monitor stop	Stop the current monitor.
disconnect	Disconnect the tcp connection on the port.
setporttimeout	Set the amount of time in seconds before the port connection will be shut down if no activity has been seen on the port.
setportconfig	Set the port configuration as in the device configuration in the /etc/ser2net.conf file. If conflicting options are specified, the last option will be the one used. Note that these will not change until the port is disconnected and connected again. 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 ignores (- checks) the modem control lines (DCD, DTR, etc.)
setportcontrol	Modify dynamic port controls. These do not stay between connections. Controls are: DTRHI, DTRLO Turns on and off the DTR line. RTSHI, RTSLO Turns on and off the RTS line.
setportenable	Sets the port operation state. Valid states are: off to shut the TCP port down, raw to enable the TCP port transfer all I/O as-is, rawlp to enable the TCP port input and device output without termios setting, and telnet to enable the TCP port is up run the telnet negotiation protocol on the port.

配置（Configuration）：

Ser2net通過文件/ etc/ser2net.conf來配置，文件包含一個或多個項目及格式：

:::: 或

BANNER:: 或

TRACEFILE::

Fields	Description
TCP port	Name or number of the TCP/IP port to accept connections 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 for the port. 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 protocol 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 disconnected 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 configuration options	Sets operational parameters for the serial port. Values may be separated by spaces or commas. 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 ignores (- checks) the modem control lines (DCD, DTR, etc.) [-]HANGUP_WHEN_DONE lowers (- does not lower) the modem control lines (DCD, DTR, etc.) when the connection closes. NOBREAK Disables automatic clearing of the break setting of the port. remctl allows remote control of the serial port parameters via RFC 2217. See the README for more info. displays the given banner when a user connects to the port. tr= When the port is opened, open the given tracefile and store all data read from the physical device (and thus written to the user's TCP port) in the file. The actual filename is specified in the TRACEFILE directive. If the file already exists, it is appended. The file is closed when the port is closed. tw= Like tr, but traces data written to the device. tb= trace both read and written data to the same file. Note that this is independent of tr and tw, so you may be tracing read, write, and both to different files.
banner name	A name for the banner; this may be used in the options of a port.
banner text	The text to display as the banner. It takes escape sequences for substituting strings, see "FILENAME AND BANNER FORMATTING" for details.
tracefile name	A name for the tracefile, this is used in the tw, tr, and tb options of a port.
tracefile	The file to send the trace into. Note that this takes escape sequences for substituting strings, see "FILENAME AND BANNER FORMATTING" for details. Note that when using the time escape sequences, the time is read once at port startup, so if you use both tw and tr they will have the same date and time.
Blank lines and lines starting with '#' are ignored.

Filename 和 Banner 格式（Filename and Banner Formatting）：

Filenames and banners may contain normal "C" escape sequences	A filename may also contain the following sequences:
\a - bell	\Y -> year
\b - backspace	\y -> day of the year (days since Jan 1)
\f - form feed	\M -> month (Jan, Feb, Mar, etc.)
\n - newline	\m -> month (as a number)
\r - carraige return	\A -> day of the week (Mon, Tue, etc.)
\t - tab	\D -> day of the month
\v - vertical tab	\e -> epoc (seconds since Jan 1, 1970)
\\ - \	\U -> microseconds in the current second
\? - ?	\p -> local port number
\' - '	\d -> local device name
\" - "	\I -> remote IP address (in dot format)
\nnn - octal value for nnn	\H -> hour (24-hour time)
\xXX - hex value for XX	\h -> hour (12-hour time)
	\i -> minute
	\s -> second
	\q -> am/pm
	\P -> AM/PM

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DIY - 智能小車：ser2net 詳細介紹 (二十一)

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