big update

Makefile

@@ -1,12 +1,16 @@
-CC=gcc
-CFLAGS=-Wall
 
-all: cmux
+CC?=gcc
+CFLAGS?=-Wall
+DESTDIR?=/
+PREFIX?=usr
 
-program: cmux.c
+cmux: cmux.c
+	$(CC) $(CFLAGS) cmux.c -o cmux
+
+install: cmux
+	install -m 0755 cmux $(DESTDIR)/$(PREFIX)/bin/cmux
 
 clean:
-	rm -f cmux
+	-@rm cmux
 
-run: cmux
-	./cmux
+.PHONY: install clean

README.md

@@ -1,6 +1,7 @@
 Cmux
 ====
 This program enables GSM 0710 multiplexing using linux n_gsm line dicipline.
+Supported are also SIM900 and Telit modules.
 
 How it works
 -------
@@ -12,29 +13,40 @@ This program :
 * Daemonizes and waits for signal
 * Removes the virtual TTYs
 
-In order to activate the CMUX mode the program sends some AT commands. Theses commands are mainly vendor specific and should be adapted to your own modem. The example in this code works for the Quectel M95 GSM module.
+In order to activate the CMUX mode the program sends some AT commands.
+Theses commands are mainly vendor specific and should be adapted to your own modem.
+The example in this code works for the Quectel M95 GSM module.
 
 How to
 ------
-* In order to run this program you should have `n_gsm` module built for your linux kernel and loaded. Use `modprobe n_gsm` to load it. If it fails you probably have to build the kernel module by yourself.
+* In order to run this program you should have `n_gsm` module built for your linux kernel and loaded.
+  Use `modprobe n_gsm` to load it. If it fails you probably have to build the kernel module by yourself.
 * Change the defined options in `cmux.c`:
 
-```c
-/* serial port of the modem */
-#define SERIAL_PORT	"/dev/ttyS1"
-/* line speed */
-#define LINE_SPEED	B115200
+```
+$ ./cmux -h
+Usage: cmux --device /dev/ttyUSB0 --speed 115200
+
+--type <type>	SIM900, TELIT or default. (Default: default)
+--device <name>	Serial device name. (Default: /dev/ttyUSB0)
+--speed <rate>	Serial device line speed. (Default: 115200)
+--mtu <number>	MTU size. (Default: 512)
+--debug [1|0]	Enable debugging. (Default: 1)
+--daemon [1|0]	Fork into background. (Default: 1)
+--driver <name>	Driver to use. (Default: gsmtty)
+--base <name>	Base name for the nodes. (Default: /dev/ttyGSM)
+--nodes [0-4]	Number of nodes to create. (Default: 1)
 ```
 
 * Change the AT commands set to fit your modem in `cmux.c`.
-* Make and run the program.
+* Call make and run the program.
 
 ```
 make
 ./cmux
 ```
 
-It will create four devices:
+It will create up to four devices:
 * /dev/ttyGSM1
 * /dev/ttyGSM2
 * /dev/ttyGSM3
@@ -45,3 +57,7 @@ You should now be able to access your modem with four TTYs and both use `ppp` an
 Links
 -----
 This program is mainly an actual implementation of [GSM 0710 tty multiplexor HOWTO](http://stuff.mit.edu/afs/sipb/contrib/linux/Documentation/serial/n_gsm.txt)
+
+License
+-----
+CC0