Modem plugins may set the 'modem' property before the 'config' property when
creating a bearer. set_signal_handlers() should thus be called after both
properties are set such that modem_{3gpp,cdma}_registration_state_changed
checks roaming allowance correctly when launching a connection.
Based on a draft patch by:
Ben Chan <benchan@chromium.org>
ModemManager configure script currenty requires glib 2.30.2 or later,
bud g_variant_new_fixed_array requires at least glib 2.32. To maintain
the compatibility with glib 2.30, this patch modifies the code to use
g_variant_new_from_data instead of g_variant_new_fixed_array.
For those who don't care about the QMI support through libqmi-glib, or if you're
stuck with glib 2.30 (libqmi-glib requires 2.32), this configure switch allows
disabling the QMI support completely.
The logic to detect cdc-wdm ports is still in place, but the QMI probing is
never launched at them. Also, all QMI-related objects won't be compiled.
Modems have a maximum of bearers allowed to be connected at a time, number which
is given by the number of available ports that may be used for data connections.
When Simple.Connect() tries to launch a connection, it will try to find first an
existing bearer with the required parameters (e.g. APN, IP type). If such bearer
is found, it will just use it. If no such bearer is found, it will try to create
one. When trying to create one, if there is no more room for bearers in the
modem, we will remove the first disconnected bearer that we find, if any, before
trying to create the new one. This logic now makes sure that no connected bearer
gets removed in order to create a new one, and also that only one existing gets
removed if possible (not every bearer as we did previously).
Further logic to connect multiple bearers at a time cannot be done using the
Simple interface.
Huawei modems will probe interface 0 always first; if we try to probe another
interface meanwhile the supports check will give us a MM_CORE_ERROR_RETRY error,
indicating that we need to defer the probing of the port.
AT!SELRAT=?
!SELRAT: Index, Name
00, Automatic
01, UMTS 3G Only
02, GSM 2G Only
03, Automatic
04, Automatic
05, GSM and UMTS Only
06, LTE Only
07, GSM, UMTS, LTE
When the modem gets unplugged, or system gone into suspend, we start losing the
modem ports one by one. When the last is lost, we trigger the disposal of the
modem (we call g_object_run_dispose() and then we call the main-reference
unref()). So, if we end up losing all ports while the connection sequence was
being run, we would end up in this situation, where we try to disconnect the
bearers (the bearer and modem objects are still valid, as we have references
around, but the list of bearers won't be available any more in the modem object
as it was cleared in the modem dispose().
Thread 0 *CRASHED* ( SIGSEGV @ 0x00000000 )
0x7f5cdbd5cda0 [ModemManager] - mm-bearer-list.c:163] mm_bearer_list_foreach
0x7f5cdbd6a4bd [ModemManager] - mm-iface-modem.c:110] bearer_status_changed
0x7f5cdbad0903 [libgobject-2.0.so.0.3000.2] - gclosure.c:774] g_closure_invoke
0x7f5cdbae1dbb [libgobject-2.0.so.0.3000.2] - gsignal.c:3272] signal_emit_unlocked_R
0x7f5cdbaeac82 [libgobject-2.0.so.0.3000.2] - gsignal.c:3003] g_signal_emit_valist
0x7f5cdbaeae5e [libgobject-2.0.so.0.3000.2] - gsignal.c:3060] g_signal_emit
0x7f5cdbad3876 [libgobject-2.0.so.0.3000.2] - gobject.c:925] g_object_dispatch_properties_changed
0x7f5cdbad5ceb [libgobject-2.0.so.0.3000.2] - gobjectnotifyqueue.c:132] g_object_notify_by_pspec
0x7f5cdbd56b08 [ModemManager] - mm-bearer.c:112] bearer_update_status
0x7f5cdbd56ffd [ModemManager] - mm-bearer.c:393] disconnect_ready
0x7f5cdbbcc676 [libgio-2.0.so.0.3000.2] - gsimpleasyncresult.c:749] g_simple_async_result_complete
0x7f5cdbbcc788 [libgio-2.0.so.0.3000.2] - gsimpleasyncresult.c:761] complete_in_idle_cb
0x7f5cdb7cff44 [libglib-2.0.so.0.3000.2] - gmain.c:2441] g_main_context_dispatch
0x7f5cdb7d0597 [libglib-2.0.so.0.3000.2] - gmain.c:3089] g_main_context_iterate
0x7f5cdb7d0b51 [libglib-2.0.so.0.3000.2] - gmain.c:3297] g_main_loop_run
0x7f5cdbd4e331 [ModemManager] - main.c:150] main
0x7f5cdb1ea41c [libc-2.15.so] - libc-start.c:234] __libc_start_main
0x7f5cdbd4de48 [ModemManager] + 0x00019e48]
Reported by Ben Chan <benchan@google.com>
Some modems (e.g. Sierra Wireless MC7710 or ZTE MF820D) won't report LTE
capabilities even if they have them. So just run AT+WS46=? as well to see
if the current supported modes list includes any LTE-specific mode.
This is not a big deal, as the AT+WS46=? command is a test command with a
cache-able result, so the next time we need the command result (when loading
supported modes) the value will be loaded from the cache.
Current capabilities is the set of *active* radios that can be used
right now. Modem capabilities are the set of all radios the modem
could use, if some action were performed to enable them if they are
not enabled already (firmware reload, changing allowed mode, etc).
For QMI devices, the DMS Get Capabilities command represents all
radios, and thus "modem capabilities".
But to read *current* capabilities, ie active radios, we need to
query the NAS System Selection Preference and grab the "mode
preference" TLV. Unfortunately that is only available with NAS
>= 1.1, which means older Gobi devices (1K and 2K) don't support
it. So for older devices, we try to get the Technology Preference
(which takes into account user-requested limitations) and then
mask that with the DMS Get Capabilities result for a best-effort
current capabilities.
For example, the Pantech UML290VW reports DMS Get Capabilities
of "cdma, evdo, gsm, umts, lte", but a more limited SSP mode
preference according to what modes are actually enabled. Gobi
1K devices don't support SSP, and the DMS Get Capabilities
reports cdma/evdo or gsm/umts depending on the currently loaded
firmware. Previous to this patch, ModemManager reported all
modes as available on the UML290, ignoring what modes were
actually enabled.
Get/Set Technology Preference was introduced in NAS 1.0, so should be always
available (even if we thought it was introduced in NAS 1.7, that's not true).
But the newer System Selection Preference behaves better as it allows more
features like 'preferred' modes; so use it when available (NAS >= 1.1).
Some of the IP address items will be 0.0.0.0 depending on what the
other items are, like when the duplicate gateway is set on newer
devices, the first gateway address may be 0.0.0.0. Since that's
not a valid IP address, just don't set that member of the config.
Second, the intent with the duplicate gateway is only to use that
when the first gateway was not given (ie, was 0.0.0.0) so fix the
check for that.
Most Sierra PPP-based devices are supposed to allow PPP on the
APP1 port, which has a dumb AT parser, leaving the main port
(with the intelligent AT parser) free for status and signal strength.
But out of all the devices I've tested it with (8775, 8781, AC881,
and C885), only the C885 actually works. The rest (including three
different firmware versions for the 8775) either crash or disconnect
shortly after PPP starts.
To help figure out which devices actually support this, when
running MM in debug mode, users can set the MM_SIERRA_APP1_PPP_OK
environment variable and assume the APP1 port allows PPP. This
is only for debugging purposes.
This is the port to git master of the following commit:
commit d1be19d231a395339b1f452d1a30b73ea77ad528
Author: Dan Williams <dcbw@redhat.com>
Date: Tue Aug 28 21:58:43 2012 -0500
sierra: fix CSQ handling on APP1 port
The APP1 port doesn't always prefix its replies with <CR><LF> which
runs afoul of the built-in echo removal. Since Sierra modems are on
the whole well-behaved WRT echo removal, just disable it on the
secondary ports. Only changes behavior for PPP-based devices since
they are the only ones that use the APP1 ports.
This is the port to git master of the following commit:
commit 01201860de5565a78823913423c6b2a762e3731f
Author: Dan Williams <dcbw@redhat.com>
Date: Tue Aug 28 21:12:14 2012 -0500
core: speed up QCDM probing a bit
The point of sending two "version info" commands was to ensure that
the terminating 0x7E of the first one was processed as a QCDM frame
boundary and that any random data in the buffer (like AT commands
from probing) got cleared out. The second command would always
get processed as a valid QCDM command if the device supported QCDM,
since there was no garbage before it.
Instead of that dance, just prepend the version info message with
an extra 0x7E to ensure a clean QCDM frame which the device hopefully
responds to immediately. Second, actually process that response
instead of throwing it away. Should save about 3 seconds when
probing QCDM ports.
This is the port to git master of the following commit:
commit 44f70121f75d59dbf31a4a9a1a4e87293e509e7a
Author: Dan Williams <dcbw@redhat.com>
Date: Tue Aug 28 20:18:40 2012 -0500
sierra: use DHCP for the USB 305 (AT&T Lightning)
For some reason, my AT&T Lightning just doesn't work with static
IP (AT%IPDPADDR) any more. No traffic passes even though everything
is set up the way it was before. No idea what happened. Using
latest firmware 2.0.0.11.
But what's interesting is on Windows the generic Sierra Watcher
app uses DHCP. But on Linux, when using AT%IPDPACT, DHCP doesn't
work. That's odd. But it turns out the modem supports the
"standard" Sierra proprietary AT!SCACT commands, and that
*does* make DHCP work. Crazy no? So since the Windows app
uses DHCP, it's likely that the non-DHCP case (AT%IPDPACT/AT%IPDPADDR)
either isn't well tested or isn't well supported. With that
in mind, let's just use DHCP for this device in Linux too.
This is the port to git master of the following commit:
commit c8153b1ecdec1995258b114c90b575af1e721d3d
Author: Dan Williams <dcbw@redhat.com>
Date: Tue Aug 28 12:16:26 2012 -0500
icera: handle additional IPv4 configuration options
Newer devices like the ZTE/Vodafone K3805-z have an enhanced
%IPDPADDR command that includes a netmask and gateway, and
these are necessary to configure the device since it uses /24
instead of a /32. Since the device is nice enough to tell
us that, we should probably use that information.
Unfortunately the MM API doens't expose the netmask and gateway
yet, so we'll have to add a GetIP4ConfigEx() method or something
like that, but this commit sets us up to do that.
This is the port to git master of the following commit:
commit d2654a287c309346cc46b535dd974b0a5fc06fd4
Author: Dan Williams <dcbw@redhat.com>
Date: Tue Aug 28 12:15:30 2012 -0500
zte: handle Icera-based devics that use DHCP
Since we can't autodetect that the devices use DHCP, we'll need to
tag them with udev rules for the time being.
Some Sierra modems (e.g. MC7710) will report LTE-specific supported modes in the
AT+WS46=? reply, but not +CLTE capability in the AT+GCAP reply:
AT+GCAP
+GCAP: +CGSM
OK
AT+WS46=?
+WS46: (12,22,25,28,29)
OK
This is the port to git master of the following commit:
commit 1d9164ec90788d1be134482ff88c501e3c5d623c
Author: Dan Williams <dcbw@redhat.com>
Date: Mon Aug 27 18:20:33 2012 -0500
gsm: if the generic CNMI request fails, try a Qualcomm-compatible one
Many devices based on Qualcomm chipsets don't support a <ds> value
of '1', despite saying they do in the AT+CNMI=? response. But they
do accept '2'. Since we're not doing much with delivery status
reports yet, if we get a CME 303 (not supported) error when setting
the message indication parameters via CNMI, fall back to the
Qualcomm-compatible CNMI parameters.
If we don't do this, we don't get SMS indications on these devices,
because the original CNMI failed.
Tested on Huawei E1550, Huawei E160G, ZTE MF622, and Novatel XU870.
This is the port to git master of the following commit:
commit 1c29ce5999d11dee2898e7bf41c00995a00c71d0
Author: Dan Williams <dcbw@redhat.com>
Date: Mon Aug 27 17:36:49 2012 -0500
sms: fix handling of 'data' property for multipart messages
Text was getting concatenated when reconstructing the full message,
but the data wasn't. That meant that non-text multipart messages,
like the binary APN/MMS settings messages that operators often send,
were broken.
