sip: origin: Handle unregistering (going offline)

and set the account state accordingly.

plugins/sip/calls-sip-origin.c

@@ -475,6 +475,31 @@ sip_r_register (int              status,
 }
 
 
+static void
+sip_r_unregister (int              status,
+                  char const      *phrase,
+                  nua_t           *nua,
+                  CallsSipOrigin  *origin,
+                  nua_handle_t    *nh,
+                  CallsSipHandles *op,
+                  sip_t const     *sip,
+                  tagi_t           tags[])
+{
+  g_debug ("response to unregistering: %03d %s", status, phrase);
+
+  if (status == 200) {
+    g_debug ("Unregistering successful");
+    origin->state = CALLS_ACCOUNT_OFFLINE;
+
+  } else {
+    g_warning ("Unregisterung unsuccessful: %03d %s", status, phrase);
+    origin->state = CALLS_ACCOUNT_UNKNOWN_ERROR;
+  }
+
+  g_object_notify_by_pspec (G_OBJECT (origin), props[PROP_ACC_STATE]);
+}
+
+
 static void
 sip_i_state (int              status,
              char const      *phrase,
@@ -658,6 +683,17 @@ sip_callback (nua_event_t   event,
                     tags);
     break;
 
+  case nua_r_unregister:
+    sip_r_unregister (status,
+                      phrase,
+                      nua,
+                      origin,
+                      nh,
+                      op,
+                      sip,
+                      tags);
+    break;
+
   case nua_r_set_params:
     g_debug ("response to set_params: %03d %s", status, phrase);
     break;