f7ec13deb8
Increase the timeout from 10 seconds to 30 seconds when reading the operator information through the MBIM_CID_HOME_PROVIDER query. We have observed cases where it took more than 12 seconds on a Fibocom L850-GL modem with specific China Unicom SIMs. This timeout was actually the cause of a corruption of the operator name (e.g. returning '@' rather than the real operator name) on the Intel XMM7360 based L850-GL. The following scenario was happening: - the base-sim code sends a first MBIM 'home-provider' query to read the operator identifier. - this query times-out after 10 seconds. - the base-sim immediately sends another MBIM 'home-provider' query to read the operator name. - the modem returns a corrupted operator identifier. Intel helped for the debugging and indicates that when the first query happens, the modem starts reading the SIM files (EF SPN/PNN), apparently it's taking a long time, when it's receives the second query while the first one is not entirely processed, this triggers a bug (in the modem firmware) and returns a corrupted name.
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 provide 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+. Code of Conduct. Please note that this project is released with a Contributor Code of Conduct. By participating in this project you agree to abide by its terms, which you can find in the following link: https://www.freedesktop.org/wiki/CodeOfConduct CoC issues may be raised to the project maintainers at the following address: modemmanager-devel-owner@lists.freedesktop.org