[PATCH phonesim] callmanager: End calls when the radio is turned off

[Herman van Hazendonk <github.com@herrie.org>]

AT+CFUN=4 only switched off registration, so calls that were up stayed
up with the radio off.  A real modem ends them, and oFono does not end
them on its own: it waits for the modem to report it, so it went on
showing calls that could no longer exist.

Once a rule has answered an AT+CFUN=<fun> with <fun> other than 1, hang
up every call from the network side, the way the GUI's remote hangup
does: *ECAV with the call ended and NO CARRIER for each, after which
oFono queries AT+CLCC and drops them.  The rule's response has been
written by then, so the NO CARRIERs follow the OK and are not taken
for the final response to AT+CFUN.  AT+CFUN? and AT+CFUN=? are left
alone, and so is a CFUN no rule accepts (default.xml has none for
CFUN=0).

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
---
 src/callmanager.cpp |  6 ++++++
 src/callmanager.h   |  3 +++
 src/phonesim.cpp    | 11 +++++++++++
 3 files changed, 20 insertions(+)

diff --git a/src/callmanager.cpp b/src/callmanager.cpp
index 40f9b3b..f1c0385 100644
--- a/src/callmanager.cpp
+++ b/src/callmanager.cpp
@@ -478,6 +478,12 @@ void CallManager::hangupRemote( int id )
     }
 }
 
+void CallManager::hangupAllRemote()
+{
+    while ( !callList.isEmpty() )
+        hangupRemote( callList.constFirst().id );
+}
+
 bool CallManager::acceptCall()
 {
     int id = idForIncoming();
diff --git a/src/callmanager.h b/src/callmanager.h
index a39f484..93381db 100644
--- a/src/callmanager.h
+++ b/src/callmanager.h
@@ -109,6 +109,9 @@ public slots:
     // Simulate a remote hangup.
     void hangupRemote( int id );
 
+    // Simulate a remote hangup of every call, as when the radio goes off.
+    void hangupAllRemote();
+
 signals:
     // Send a response to a command.
     void send( const QString& line );
diff --git a/src/phonesim.cpp b/src/phonesim.cpp
index 89d5e9d..994031c 100644
--- a/src/phonesim.cpp
+++ b/src/phonesim.cpp
@@ -1182,6 +1182,17 @@ void SimRules::command( const QString& cmd )
             respond( "ERROR" );
 
         }
+    } else if ( cmd.startsWith( "AT+CFUN=" ) ) {
+
+        // A real modem ends every call when its radio is turned off, and
+        // oFono waits for it to do so.  The rule has answered by now, so
+        // the NO CARRIERs cannot be taken as the final response to AT+CFUN.
+        bool ok;
+        int fun = cmd.mid( 8 ).section( ',', 0, 0 ).toInt( &ok );
+
+        if ( ok && fun != 1 )
+            _callManager->hangupAllRemote();
+
     }
 }
 
-- 
2.53.0