[PATCH] hwsim tests: tshark: deal with "wlan_mgt" -> "wlan" rename

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From: Johannes Berg <johannes.berg@xxxxxxxxx>

Recent versions of tshark/wireshark renamed these fields, deal
with that in the tshark wrapper code.

Signed-off-by: Johannes Berg <johannes.berg@xxxxxxxxx>
---
 tests/hwsim/tshark.py | 39 ++++++++++++++++++++++++++++++++++++---
 1 file changed, 36 insertions(+), 3 deletions(-)

diff --git a/tests/hwsim/tshark.py b/tests/hwsim/tshark.py
index d2a8c45ca24f..2d4389c69974 100644
--- a/tests/hwsim/tshark.py
+++ b/tests/hwsim/tshark.py
@@ -12,10 +12,14 @@ import subprocess
 import logging
 logger = logging.getLogger()
 
+class UnknownFieldsException(Exception):
+    def __init__(self, fields):
+        Exception.__init__(self, "unknown tshark fields %s" % ','.join(fields))
+        self.fields = fields
 
 _tshark_filter_arg = '-Y'
 
-def run_tshark(filename, filter, display=None, wait=True):
+def _run_tshark(filename, filter, display=None, wait=True):
     global _tshark_filter_arg
 
     if wait:
@@ -44,8 +48,21 @@ def run_tshark(filename, filter, display=None, wait=True):
     out = output[0]
     res = cmd.wait()
     if res == 1:
-        if "Some fields aren't valid" in output[1]:
-            raise Exception("Unknown tshark field")
+        errmsg = "Some fields aren't valid"
+        if errmsg in output[1]:
+            errors = output[1].split('\n')
+            fields = []
+            collect = False
+            for f in errors:
+                if collect:
+                    f = f.strip()
+                    if f:
+                        fields.append(f)
+                    continue
+                if errmsg in f:
+                    collect = True
+                    continue
+            raise UnknownFieldsException(fields)
         # remember this for efficiency
         _tshark_filter_arg = '-R'
         arg[3] = '-R'
@@ -55,3 +72,19 @@ def run_tshark(filename, filter, display=None, wait=True):
         cmd.wait()
 
     return out
+
+def run_tshark(filename, filter, display=None, wait=True):
+    if display is None: display = []
+    try:
+        return _run_tshark(filename, filter, display, wait)
+    except UnknownFieldsException, e:
+        all_wlan_mgt = True
+        for f in e.fields:
+            if not f.startswith('wlan_mgt.'):
+                all_wlan_mgt = False
+                break
+        if not all_wlan_mgt:
+            raise
+        return _run_tshark(filename, filter.replace('wlan_mgt', 'wlan'),
+                           [x.replace('wlan_mgt', 'wlan') for x in display],
+                           wait)
-- 
2.14.2


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