Aleksander Morgado
746cf54b11
ModemManager[18223]: <debug> [1530023432.028473] Modem has 3GPP capabilities, enabling the Modem 3GPP interface...
Thread 1 "ModemManager" received signal SIGSEGV, Segmentation fault.
0x0000555555618baa in common_enable_disable_unsolicited_events_signal_strength (task=0x5555558e4440) at mm-broadband-modem-qmi.c:6545
6545 if (ctx->enable)
(gdb) bt
#0 0x0000555555618baa in common_enable_disable_unsolicited_events_signal_strength (task=0x5555558e4440) at mm-broadband-modem-qmi.c:6545
#1 0x0000555555618d70 in common_enable_disable_unsolicited_events (self=0x55555597a3f0, enable=1, callback=0x5555555c8c20 <enable_unsolicited_events_ready>, user_data=0x5555559779b0)
at mm-broadband-modem-qmi.c:6719
#2 0x0000555555618e5b in modem_3gpp_enable_unsolicited_events (self=0x55555597a3f0, callback=0x5555555c8c20 <enable_unsolicited_events_ready>, user_data=0x5555559779b0) at mm-broadband-modem-qmi.c:6749
#3 0x00005555555c9095 in interface_enabling_step (task=0x5555559779b0) at mm-iface-modem-3gpp.c:1907
#4 0x00005555555c8c0a in setup_unsolicited_events_ready (self=0x55555597a3f0, res=0x5555558efad0, task=0x5555559779b0) at mm-iface-modem-3gpp.c:1795
#5 0x00007ffff681e204 in () at /usr/lib/libgio-2.0.so.0
#6 0x00007ffff681e239 in () at /usr/lib/libgio-2.0.so.0
#7 0x00007ffff62731d6 in g_main_context_dispatch () at /usr/lib/libglib-2.0.so.0
#8 0x00007ffff62735b1 in () at /usr/lib/libglib-2.0.so.0
#9 0x00007ffff62738e2 in g_main_loop_run () at /usr/lib/libglib-2.0.so.0
#10 0x000055555559182c in main (argc=2, argv=0x7fffffffe4a8) at main.c:181
Fixes: baefe53ab9
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+.