From a032d73f1d405f3bae269791e9064026faa491d9 Mon Sep 17 00:00:00 2001
From: Christian Poessinger <christian@poessinger.com>
Date: Thu, 18 Nov 2021 17:56:57 +0100
Subject: wwan: T3795: make connect and disconnect op-mode commands aware to
 WWAN interfaces

---
 python/vyos/util.py | 16 ++++++++++++++++
 1 file changed, 16 insertions(+)

(limited to 'python')

diff --git a/python/vyos/util.py b/python/vyos/util.py
index 9f01d504d..1834b78bd 100644
--- a/python/vyos/util.py
+++ b/python/vyos/util.py
@@ -717,3 +717,19 @@ def is_systemd_service_running(service):
     Copied from: https://unix.stackexchange.com/a/435317 """
     tmp = cmd(f'systemctl show --value -p SubState {service}')
     return bool((tmp == 'running'))
+
+def is_wwan_connected(interface):
+    """ Determine if a given WWAN interface, e.g. wwan0 is connected to the
+    carrier network or not """
+    import json
+
+    if not interface.startswith('wwan'):
+        raise ValueError(f'Specified interface "{interface}" is not a WWAN interface')
+
+    modem = interface.lstrip('wwan')
+
+    tmp = cmd(f'mmcli --modem {modem} --output-json')
+    tmp = json.loads(tmp)
+
+    # return True/False if interface is in connected state
+    return dict_search('modem.generic.state', tmp) == 'connected'
-- 
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