22b0de736b
If the bearer is not actually connected and the modem (inappropriately)
indicates a disconnected status via a ^NDISSTAT unsolicited message, it
could potentially lead to the following assertion in
connect_3gpp_context_step. This patch addresses such an issue.
g_assert (ctx->self->priv->network_disconnect_pending_id == 0);
0x7f940c2ecd95 [libc-2.15.so] - raise.c:64 raise
0x7f940c2ee217 [libc-2.15.so] - abort.c:91 abort
0x7f940c8e6086 [libglib-2.0.so.0.3400.3] - gtestutils.c:1877 g_assertion_message
0x7f940c8e6553 [libglib-2.0.so.0.3400.3] - gtestutils.c:1888 g_assertion_message_expr
0x7f940cba5710 [libmm-plugin-huawei.so] - mm-broadband-bearer-huawei.c:240 connect_3gpp_context_step
0x7f940cd4a51e [ModemManager] - mm-broadband-bearer.c:1246 connect
0x7f940cd662b7 [ModemManager] - mm-iface-modem-simple.c:588 connection_step
0x7f940cd66e6e [ModemManager] - mm-iface-modem-simple.c:267 register_in_3gpp_or_cdma_network_ready
0x7f940ca0e296 [libgio-2.0.so.0.3400.3] - gsimpleasyncresult.c:775 g_simple_async_result_complete
0x7f940ca0e398 [libgio-2.0.so.0.3400.3] - gsimpleasyncresult.c:787 complete_in_idle_cb
0x7f940c8c2ff4 [libglib-2.0.so.0.3400.3] - gmain.c:2715 g_main_context_dispatch
0x7f940c8c3377 [libglib-2.0.so.0.3400.3] - gmain.c:3290 g_main_context_iterate
0x7f940c8c37c9 [libglib-2.0.so.0.3400.3] - gmain.c:3484 g_main_loop_run
0x7f940cd3b425 [ModemManager] - main.c:142 main
0x7f940c2d9464 [libc-2.15.so] - libc-start.c:234 __libc_start_main
0x7f940cd3afa8 [ModemManager] + 0x0001efa8
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!