I might be missing something here, but this (correct?) code:
msg = nx.nx_flow_mod()
action = nx.nx_reg_load()
action.dst = nx.NXM_NX_REG0
action.nbits = 32
action.value = 0xdeadbeef
msg.actions.append(action)
connection.send(msg)
gives me this error:
ERROR:core:Exception while handling OpenFlowNexus!ConnectionUp...
Traceback (most recent call last):
File "/src/pox/pox/lib/revent/revent.py", line 234, in raiseEventNoErrors
return self.raiseEvent(event, *args, **kw)
File "/src/pox/pox/lib/revent/revent.py", line 281, in raiseEvent
rv = event._invoke(handler, *args, **kw)
File "/src/pox/pox/lib/revent/revent.py", line 159, in _invoke
return handler(self, *args, **kw)
File "/src/pox/ext/werk.py", line 68, in start_switch
SwitchWerker(event.connection)
File "/src/pox/ext/werk.py", line 27, in __init__
connection.send(msg)
File "/src/pox/pox/openflow/of_01.py", line 687, in send
data = data.pack()
File "/src/pox/pox/openflow/nicira.py", line 403, in pack
packed += i.pack()
File "/src/pox/pox/openflow/libopenflow_01.py", line 1958, in pack
body = self._pack_body()
File "/src/pox/pox/openflow/nicira.py", line 510, in _pack_body
dst = o.pack(omittable=False)[:4]
File "/src/pox/pox/openflow/nicira.py", line 911, in pack
r += value
TypeError: cannot concatenate 'str' and 'NoneType' objects
without this patch:
Signed-off-by: Saul St. John <[email protected]>
---
pox/openflow/nicira.py | 7 ++++---
1 file changed, 4 insertions(+), 3 deletions(-)
diff --git a/pox/openflow/nicira.py b/pox/openflow/nicira.py
index 35499a3..8c86206 100644
--- a/pox/openflow/nicira.py
+++ b/pox/openflow/nicira.py
@@ -905,10 +905,11 @@ class nxm_entry (object):
r = struct.pack("!L", h)
value = self._value
- assert value is not None
- assert len(value) == self._nxm_length, "value is wrong length"
- r += value
+ if value is not None:
+ assert len(value) == self._nxm_length, "value is wrong length"
+ r += value
+
if mask is not None:
assert 0 == sum(ord(v)&(0xff&~ord(m)) for v,m in zip(value,mask)), \
"nonzero masked bits"
--
1.7.10.4
