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imsd, imsd-ofonod: let polkit decide call control, not the account name

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The system-bus policies granted net.catcrafts.IMS1 and org.ofono to root
and to the account `user`, postmarketOS's default name, so on a unit
whose account is called something else dbus denied every Dial from the
dialer — nothing in imsd's journal, nothing on screen. A field user
found it by trial (alyx report 14, 2026-09-20; ims ledger F14).

Let any local account reach both names and have the daemons decide:
placing, answering or ending a call needs polkit's
net.catcrafts.IMS1.Voice (the active local session; not an ssh login, an
inactive session or a system service account). imsd-ofonod asks about
its own callers, since its calls reach imsd as root. Reads such as the
status and the call list are not gated, and a refusal is logged with the
sender; a `--session` run, the development mode without root or polkit,
leaves the gate off. The check is ImsdBus, a small GLib module both
daemons link; the package depends on polkit.

An upgrade restarts both daemons (the previous commit), so the open
policy faces the old, ungated daemons only until the apk transaction
ends.

Tested on the dev phone (KPN) in builds of this series; not every path
has run there.
This commit is contained in:
Jorijn van der Graaf 2026-10-03 20:44:58 +02:00
commit f18baf2790
Signed by: jorijnvdgraaf
GPG key ID: 2937E59CDCC1BCFB
13 changed files with 245 additions and 52 deletions
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11
packaging/net.catcrafts.IMS1.conf
View file

@ -11,12 +11,13 @@
<allow send_destination="net.catcrafts.IMS1"/>
<allow receive_sender="net.catcrafts.IMS1"/>
</policy>
<!-- the phone session user drives calls via the imsdialerd shim -->
<policy user="user">
<!-- Any local account may reach imsd: the dialer shim runs as the session
account, whatever it is called. imsd itself decides who may place,
answer or end a call — polkit's net.catcrafts.IMS1.Voice
(net.catcrafts.IMS1.policy: the active local session). Owning the name
stays root's. -->
<policy context="default">
<allow send_destination="net.catcrafts.IMS1"/>
<allow receive_sender="net.catcrafts.IMS1"/>
</policy>
<policy context="default">
<deny send_destination="net.catcrafts.IMS1"/>
</policy>
</busconfig>