Aleksander Morgado
250639e3da
Until now the ID_MM_DEVICE_IGNORE udev tag was being used in the internal blacklist of devices shipped by ModemManager when running in either DEFAULT or PARANOID filter modes. The name of the tag is extremely misleading because it doesn't really make the full device be ignored, the tag only applied to TTY ports. This commit repurposes the tag so that it applies to ANY kind of port (e.g. TTY, NET, cdc-wdm...) and also to any kind of filter type (i.e. also applicable in STRICT mode). The internal blacklist shipped by ModemManager, which should NOT be used in STRICT mode, uses a new tag name, ID_MM_TTY_BLACKLIST. The new ID_MM_DEVICE_IGNORE tag is therefore much more usable and its name is really meaningful. If there are users or third-party projects adding their own udev rules with the ID_MM_DEVICE_IGNORE tag name, they should have no problem as the new rule is more restrictive than the old one.
ModemManager. ModemManager provides a unified high level API for communicating with mobile broadband modems, regardless of the protocol used to communicate with the actual device (Generic AT, vendor-specific AT, QCDM, QMI, MBIM...). Using. ModemManager is a system daemon and is not meant to be used directly from the command line. However, since it provides a DBus API, it is possible to use 'dbus-send' commands or the new 'mmcli' command line interface to control it from the terminal. The devices are queried from udev and automatically updated based on hardware events, although a manual re-scan can also be requested to look for RS232 modems. Implementation. ModemManager is a DBus system bus activated service (meaning it's started automatically when a request arrives). It is written in C, using glib and gio. Several GInterfaces specify different features that the modems support, including the generic MMIfaceModem3gpp and MMIfaceModemCdma which provice basic operations for 3GPP (GSM, UMTS, LTE) or CDMA (CDMA1x, EV-DO) modems. If a given feature is not available in the modem, the specific interface will not be exported in DBus. Plugins. Plugins are loaded on startup, and must implement the MMPlugin interface. It consists of a couple of methods which tell the daemon whether the plugin supports a port and to create custom MMBroadbandModem implementations. It most likely makes sense to derive custom modem implementations from one of the generic classes and just add (or override) operations which are not standard. There are multiple fully working plugins in the plugins/ directory that can be used as an example for writing new plugins. Writing new plugins is highly encouraged! The plugin API is open for changes, so if you're writing a plugin and need to add or change some public method, feel free to suggest it! License. The ModemManager and mmcli binaries are both GPLv2+. The libmm-glib library is LGPLv2+.