Lubomir Rintel
e27f4a6226
Otherwise the dangling pointer to the context that's being deallocated causes a crash on spontaneous E2NAP receipt: ModemManager[1567]: <info> [1462468083.031326] [mm-iface-modem.c:1431] __iface_modem_update_state_internal(): Modem /org/freedesktop/ModemManager1/Modem/0: state changed (connecting -> registered) ModemManager[1567]: <debug> [1462468083.053745] [mm-port-serial-at.c:459] debug_log(): (ttyACM0): <-- '<CR><LF>*E2NAP: 0,36<CR><LF>' ModemManager[1567]: <debug> [1462468083.053857] [mbm/mm-broadband-modem-mbm.c:824] e2nap_received(): disconnected (ModemManager:1567): GLib-GIO-CRITICAL **: g_simple_async_result_set_error: assertion 'G_IS_SIMPLE_ASYNC_RESULT (simple)' failed Program received signal SIGTRAP, Trace/breakpoint trap. g_logv (log_domain=0x7ffff7086798 "GLib-GIO", log_level=G_LOG_LEVEL_CRITICAL, format=<optimized out>, args=args@entry=0x7fffffffcda0) at gmessages.c:1046 1046 g_private_set (&g_log_depth, GUINT_TO_POINTER (depth)); Missing separate debuginfos, use: debuginfo-install libmbim-1.12.4-2.el7.centos.x86_64 libqmi-1.14.2-1.el7.centos.x86_64 (gdb) bt #0 0x00007ffff6a508c3 in g_logv (log_domain=0x7ffff7086798 "GLib-GIO", log_level=G_LOG_LEVEL_CRITICAL, format=<optimized out>, args=args@entry=0x7fffffffcda0) at gmessages.c:1046 #1 0x00007ffff6a50a3f in g_log (log_domain=log_domain@entry=0x7ffff7086798 "GLib-GIO", log_level=log_level@entry=G_LOG_LEVEL_CRITICAL, format=format@entry=0x7ffff6abe73d "%s: assertion '%s' failed") at gmessages.c:1079 #2 0x00007ffff6a50a79 in g_return_if_fail_warning (log_domain=log_domain@entry=0x7ffff7086798 "GLib-GIO", pretty_function=pretty_function@entry=0x7ffff7092ce0 <__FUNCTION__.13394> "g_simple_async_result_set_error", expression=expression@entry=0x7ffff7092a40 "G_IS_SIMPLE_ASYNC_RESULT (simple)") at gmessages.c:1088 #3 0x00007ffff6ff9d3d in g_simple_async_result_set_error (simple=0x7fffe8006e40, domain=297, code=0, format=0x7ffff175b53f "Call setup failed") at gsimpleasyncresult.c:719 #4 0x00007ffff17569ea in report_connection_status (bearer=0x7fffe4008a40 [MMBroadbandBearerMbm], status=MM_BEARER_CONNECTION_STATUS_DISCONNECTED) at mbm/mm-broadband-bearer-mbm.c:174 #5 0x000055555559c9f1 in mm_base_bearer_report_connection_status (self=0x7fffe4008a40 [MMBroadbandBearerMbm], status=MM_BEARER_CONNECTION_STATUS_DISCONNECTED) at mm-base-bearer.c:1118 #6 0x00007ffff17548ed in bearer_list_report_status_foreach (bearer=0x7fffe4008a40 [MMBroadbandBearerMbm], ctx=0x7fffffffd060) at mbm/mm-broadband-modem-mbm.c:805 #7 0x00007ffff6a45f18 in g_list_foreach (list=<optimized out>, func=0x7ffff17548c9 <bearer_list_report_status_foreach>, user_data=0x7fffffffd060) at glist.c:994 #8 0x00005555555a224b in mm_bearer_list_foreach (self=0x5555558e0680 [MMBearerList], func=0x7ffff17548c9 <bearer_list_report_status_foreach>, user_data=0x7fffffffd060) at mm-bearer-list.c:146 #9 0x00007ffff1754a3d in e2nap_received (port=0x5555558e24c0 [MMPortSerialAt], info=0x555555935730, self=0x555555900330 [MMBroadbandModemMbm]) at mbm/mm-broadband-modem-mbm.c:850 #10 0x000055555563d9fd in parse_unsolicited (port=0x5555558e24c0 [MMPortSerialAt], response=0x7fffe80054f0) at mm-port-serial-at.c:280 #11 0x0000555555639915 in parse_response_buffer (self=0x5555558e24c0 [MMPortSerialAt]) at mm-port-serial.c:889 #12 0x0000555555639f0b in common_input_available (self=0x5555558e24c0 [MMPortSerialAt], condition=G_IO_IN) at mm-port-serial.c:1019 #13 0x0000555555639fc7 in iochannel_input_available (iochannel=0x555555926df0, condition=G_IO_IN, data=0x5555558e24c0) at mm-port-serial.c:1042 #14 0x00007ffff6a4979a in g_main_context_dispatch (context=0x5555558a4a00) at gmain.c:3109 #15 0x00007ffff6a4979a in g_main_context_dispatch (context=context@entry=0x5555558a4a00) at gmain.c:3708 #16 0x00007ffff6a49ae8 in g_main_context_iterate (context=0x5555558a4a00, block=block@entry=1, dispatch=dispatch@entry=1, self=<optimized out>) at gmain.c:3779 #17 0x00007ffff6a49dba in g_main_loop_run (loop=0x5555558acf10) at gmain.c:3973 #18 0x000055555558d068 in main (argc=2, argv=0x7fffffffdc38) at main.c:181 (gdb) https://bugzilla.redhat.com/show_bug.cgi?id=1333293 https://bugs.freedesktop.org/show_bug.cgi?id=95303
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+.