e17d5a51a2
The PDP contexts that are found with an empty APN configured are right
now used as placeholders that can be overwritten with the user
provided APN if no direct match is found.
We want to keep that logic in place, but for the case where we do get
an empty APN requested by the user, we need to perform the full
context match, so that the first PDP context matching the empty APN is
used.
Right now we're overwriting with the empty APN again the last PDP
context found with an empty APN, which doesn't make much sense:
Apr 27 08:15:21 ModemManager[4251]: <debug> Found '3' PDP contexts
Apr 27 08:15:21 ModemManager[4251]: <debug> PDP context [cid=1] [type='ipv4'] [apn='']
Apr 27 08:15:21 ModemManager[4251]: <debug> PDP context [cid=2] [type='ipv4'] [apn='broadband']
Apr 27 08:15:21 ModemManager[4251]: <debug> PDP context [cid=15] [type='ipv4'] [apn='']
Apr 27 08:15:21 ModemManager[4251]: <debug> Found PDP context with CID 1 and no APN
Apr 27 08:15:21 ModemManager[4251]: <debug> Found PDP context with CID 15 and no APN
Apr 27 08:15:21 ModemManager[4251]: <debug> (ttyUSB3) device open count is 3 (open)
Apr 27 08:15:21 ModemManager[4251]: <debug> (ttyUSB3) device open count is 2 (close)
Apr 27 08:15:21 ModemManager[4251]: <debug> (ttyUSB3): --> 'AT+CGDCONT=15,"IP",""<CR>'
Apr 27 08:15:21 ModemManager[4251]: <debug> (ttyUSB3): <-- '<CR><LF>OK<CR><LF>'
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+.