2010/4/28 Dan Williams <d...@redhat.com> > On Wed, 2010-04-28 at 09:37 +0200, toabctl wrote: > > 1) How does network-manager detect that the modem is connected? Or how > > can i tell networkmanager on which port the modem is attached? I use a > > rs232<->usb adapter so the port is /dev/ttyUSB0 . > > ModemManager uses udev for device detection. It listens for udev events > (which you can also listen for with udevmonitor) and when it receives a > notification of a new serial port, it will inspect that port and attempt > to probe it.
How does ModemManager probe the port? I want to use modem manager also with a rs232 device and there are no uevents because rs232 has no hotplug. but i could emit a uevent "by hand". The information about the device ( /dev/ttyS1 ): # udevadm info --query=all -n /dev/ttyS1 P: /devices/platform/atmel_usart.1/tty/ttyS1 N: ttyS1 S: char/4:65 E: UDEV_LOG=3 E: DEVPATH=/devices/platform/atmel_usart.1/tty/ttyS1 E: MAJOR=4 E: MINOR=65 E: DEVNAME=/dev/ttyS1 E: SUBSYSTEM=tty E: DEVLINKS=/dev/char/4:65 # udevadm info --query=all -n /dev/ttyS1 --attribute-walk ... looking at device '/devices/platform/atmel_usart.1/tty/ttyS1': KERNEL=="ttyS1" SUBSYSTEM=="tty" DRIVER=="" looking at parent device '/devices/platform/atmel_usart.1': KERNELS=="atmel_usart.1" SUBSYSTEMS=="platform" DRIVERS=="atmel_usart" ATTRS{modalias}=="platform:atmel_usart" looking at parent device '/devices/platform': KERNELS=="platform" SUBSYSTEMS=="" DRIVERS=="" How can i use this port with ModemManager? The modem is connected and AT-Commands works. > There are a number of requirements of the port though; it > verifies that the kernel has assigned a driver name to the port or one > of the port's parents, and it attempts to grab the port's physical > device. Given that it's USB, it *should* work. But if it doesn't, and > you have a chance to grab the ModemManager source [1], there's a tool > called 'lsudev' in the test/ directory that can give us an idea of the > udev-provided information of the device. > i guess 'lsudev' does the same as my 2 commands with 'udevadm', right? or does 'lsudev' something more special? > > > 2) How does the connection-config looks like? > > ModemManager is just a tool to control the modem, it doesn't store any > configuration about it. The configuration is provided by a program that > tells ModemManager what to do. There are a few ways to do that; > NetworkManager provides a general modem control solution, but you can > also write your own app that uses D-Bus to tell ModemManager what to do > with the modem. See test/mm-test.py for a short example of how to use > python and D-Bus to make MM connect the modem and get information out of > it. > ah. that's great. i need to control the modem over a web-interface so no nm-applet available. Cheers, Tom
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