From dugsong on January 06, 2011 07:45:41

I can't reproduce this?

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From [email protected] on March 01, 2011 13:13:25

I just ran into this on OS X.

[joe@deepwater-2:~]$ python -c 'import dpkt'
Traceback (most recent call last):
File "", line 1, in
File "/opt/local/Library/Frameworks/Python.framework/Versions/2.6/lib/python2.6/site-packages/dpkt/init.py", line 24, in
import ethernet
File "/opt/local/Library/Frameworks/Python.framework/Versions/2.6/lib/python2.6/site-packages/dpkt/ethernet.py", line 128, in
load_types()
File "/opt/local/Library/Frameworks/Python.framework/Versions/2.6/lib/python2.6/site-packages/dpkt/ethernet.py", line 122, in __load_types
mod = __import(modname, g)
File "/opt/local/Library/Frameworks/Python.framework/Versions/2.6/lib/python2.6/site-packages/dpkt/ip6.py", line 95, in
import ip
File "/opt/local/Library/Frameworks/Python.framework/Versions/2.6/lib/python2.6/site-packages/dpkt/ip.py", line 255, in
__load_protos()
File "/opt/local/Library/Frameworks/Python.framework/Versions/2.6/lib/python2.6/site-packages/dpkt/ip.py", line 245, in __load_protos
for k, v in g.iteritems():
RuntimeError: dictionary changed size during iteration

However, it's not consistent. Not sure what triggers it.

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From [email protected] on September 12, 2012 13:53:26

Alternate fix:

--- dpkt/ip.py ( revision 84 )
+++ dpkt/ip.py (working copy)
@@ -2,6 +2,7 @@

"""Internet Protocol."""

+import copy
import dpkt

class IP(dpkt.Packet):
@@ -241,7 +242,7 @@

XXX - auto-load IP dispatch table from IP_PROTO_* definitions

def __load_protos():

• g = globals()
• g = copy.copy(globals())
  for k, v in g.iteritems():
  if k.startswith('IP_PROTO_'):
  name = k[9:].lower()

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From [email protected] on May 13, 2013 01:59:26

So I had the same problem and I dug in and I notice that the problem is that the import in that loop is not relative. Meaning that you might import a non-relevant package by accident (in my case mtp).

The solution is:
@@ -246,7 +246,7 @@
if k.startswith('IP_PROTO_'):
name = k[9:].lower()
try:

•            mod = **import**(name, g)
  

•            mod = **import**(name, g, level=1)
       except ImportError:
           continue
       IP.set_proto(v, getattr(mod, name.upper()))
  

This should be commited to head

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A quick glance makes #61 seem to be a related issue

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Fixed in d7684fe. Tracked in #203

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