From 42d7135849a9069b2e04f3107ca2bda9b53d103a Mon Sep 17 00:00:00 2001
From: Papoteur <papoteur@mageia.org>
Date: Sun, 31 May 2020 12:15:29 +0200
Subject: Add checking of present protocols, to avoid exception.

---
 src/monitor.py  | 7 +++++++
 src/net_monitor | 2 +-
 2 files changed, 8 insertions(+), 1 deletion(-)

diff --git a/src/monitor.py b/src/monitor.py
index e7a3c12..3198b78 100644
--- a/src/monitor.py
+++ b/src/monitor.py
@@ -328,6 +328,13 @@ class Monitor:
             pass
         return routes, default_routes
 
+    def protocols_list(self):
+        protos = []
+        for proto in ["tcp", "tcp6", "udp", "udp6"]:
+            if os.path.exists("/proc/net/%s" % proto):
+                protos.append(proto)
+        return protos
+
     def get_connections(self, proto="tcp"):
         """Reads active connections"""
         connections=[]
diff --git a/src/net_monitor b/src/net_monitor
index cdd5c6d..4a8ddf9 100755
--- a/src/net_monitor
+++ b/src/net_monitor
@@ -559,7 +559,7 @@ class MonitorGui:
         """Updates connections"""
         lstore = self.connections
         lstore.clear()
-        for proto in ["tcp", "tcp6", "udp", "udp6"]:
+        for proto in self.monitor.protocols_list():
             connections = self.monitor.get_connections(proto=proto)
             for loc_addr, loc_port, rem_addr, rem_port, status in connections:
                 iter = lstore.append()
-- 
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