Aleksander Morgado
8a54baa346
If the modem goes away (ports removed) during the initialization
phase (e.g. while QMI clients are being allocated), the MMPortQmi
object will be closed and it will lose its internal QmiDevice.
We should therefore consider the lack of QmiDevice a valid usecase in
track_qmi_device_removed() and return a GError when that happens.
#0 0x00007fb544618cc9 in raise () from /lib/libc.so.6
#1 0x00007fb54461bd68 in abort () from /lib/libc.so.6
#2 0x00007fb544e2213d in g_assertion_message () from /usr/lib/libglib-2.0.so.0
#3 0x00007fb544e221ba in g_assertion_message_expr () from /usr/lib/libglib-2.0.so.0
#4 0x00000000004be584 in track_qmi_device_removed ()
#5 0x00000000004be5e3 in allocate_next_client ()
#6 0x00000000004be7b1 in qmi_port_allocate_client_ready ()
#7 0x00007fb5453690a3 in g_task_return_now () from /usr/lib/libgio-2.0.so.0
#8 0x00007fb54536967e in g_task_return () from /usr/lib/libgio-2.0.so.0
#9 0x00000000004dd8f8 in allocate_client_ready ()
#10 0x00007fb5453690a3 in g_task_return_now () from /usr/lib/libgio-2.0.so.0
#11 0x00007fb54536967e in g_task_return () from /usr/lib/libgio-2.0.so.0
#12 0x00007fb54591d4de in allocate_cid_ready () from /usr/lib/libqmi-glib.so.5
...
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+.