NetBSD Problem Report #54028
From martin@duskware.de Fri Mar 1 11:09:11 2019
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From: martin@NetBSD.org
Reply-To: martin@NetBSD.org
To: gnats-bugs@NetBSD.org
Subject: net/scapy not working?
X-Send-Pr-Version: 3.95
>Number: 54028
>Category: pkg
>Synopsis: net/scapy not working?
>Confidential: no
>Severity: serious
>Priority: medium
>Responsible: gutteridge
>State: open
>Class: sw-bug
>Submitter-Id: net
>Arrival-Date: Fri Mar 01 11:10:01 +0000 2019
>Closed-Date:
>Last-Modified: Tue Nov 05 02:28:26 +0000 2019
>Originator: Martin Husemann
>Release: NetBSD 8.99.34
>Organization:
The NetBSD Foundation, Inc.
>Environment:
System: NetBSD space-truckin.duskware.de 8.99.34 NetBSD 8.99.34 (SUNXI) #33: Tue Feb 26 07:40:08 CET 2019 martin@night-owl.duskware.de:/usr/src/sys/arch/evbarm/compile/SUNXI evbarm
Architecture: earmv7hfeb
Machine: evbarm
>Description:
I was trying to run a python script from a recentish FreeBSD test case
commit and could not make it work. It does soemthing along the lines of:
import scapy.all as sp
def main():
intf = sys.argv[1]
ipv6_src = sys.argv[2]
ipv6_dst = sys.argv[3]
ipv6_main = sp.IPv6(dst=ipv6_dst, src=ipv6_src)
[...]
sp.sendp(pkt0, iface=intf, verbose=False)
I have scapy-2.3.2 from pkgsrc, and I called the test script with:
# python2.7 test.py awge0 2001:470:1f0b:e84:a982:4f01:4b81:7d8a 2001:470:a085:999::80
(where awge0 is my only ethernet interface, the first address is my local
IPv6 and the second is www.netbsd.org).
Scapy failed to send the packet:
WARNING: No route found for IPv6 destination 2001:470:a085:999::80 (no default route?)
which is plain wrong, I can do:
> ping6 -S 2001:470:1f0b:e84:a982:4f01:4b81:7d8a 2001:470:a085:999::80
PING6(56=40+8+8 bytes) 2001:470:1f0b:e84:a982:4f01:4b81:7d8a --> 2001:470:a085:999::80
16 bytes from 2001:470:a085:999::80, icmp_seq=0 hlim=54 time=156.987 ms
16 bytes from 2001:470:a085:999::80, icmp_seq=1 hlim=54 time=155.625 ms
>How-To-Repeat:
s/a
>Fix:
n/a
>Release-Note:
>Audit-Trail:
From: Aymeric Vincent <aymericvincent@free.fr>
To: gnats-bugs@netbsd.org
Cc:
Subject: Re: pkg/54028
Date: Thu, 28 Mar 2019 18:59:31 +0100
Hi,
could you please obtain the output of the following snippet?
from scapy.arch import read_routes6
for r in read_routes6():
print r
and see if it matches the output of netstat -rn -f inet6? On BSD, scapy
parses the output of netstat to determine its routing table. It seems to
work for me on -current, but I don't use IPv6 so I tried only with
link-local addresses. :-/
Regards,
Aymeric
From: Martin Husemann <martin@duskware.de>
To: gnats-bugs@netbsd.org
Cc:
Subject: Re: pkg/54028
Date: Thu, 28 Mar 2019 20:15:43 +0100
Script output:
('::', 104, '::', 'lo0', ['::1'])
('::', 96, '::', 'lo0', ['::1'])
('::1', 128, '::', 'lo0', ['::1'])
('::127.0.0.0', 104, '::', 'lo0', ['::1'])
('::224.0.0.0', 100, '::', 'lo0', ['::1'])
('::255.0.0.0', 104, '::', 'lo0', ['::1'])
('::ffff:0.0.0.0', 96, '::', 'lo0', ['::1'])
('2001:470:1f0b:e84:a982:4f01:4b81:7d8a', 128, '::', 'lo0', ['::1'])
('2001:db8::', 32, '::', 'lo0', ['::1'])
('2002::', 24, '::', 'lo0', ['::1'])
('2002:7f00::', 24, '::', 'lo0', ['::1'])
('2002:e000::', 20, '::', 'lo0', ['::1'])
('2002:ff00::', 24, '::', 'lo0', ['::1'])
('fe80::', 10, '::', 'lo0', ['::1'])
('fe80::', 64, '::', 'awge0', ['fe80::9a43:96ac:a66b:d416'])
('fe80::9a43:96ac:a66b:d416', 128, '::', 'lo0', ['::1'])
('fe80::', 64, '::', 'lo0', ['::1'])
('fe80::1', 128, '::', 'lo0', ['::1'])
('ff01:1::', 32, '::', 'awge0', ['::1'])
('ff01:2::', 32, '::', 'lo0', ['::1'])
('ff02::', 32, '::', 'awge0', ['fe80::9a43:96ac:a66b:d416'])
('ff02::', 32, '::', 'lo0', ['::1'])
netstat output:
Routing tables
Internet6:
Destination Gateway Flags Refs Use Mtu Interface
::/104 ::1 UGRS - - 33176 lo0
::/96 ::1 UGRS - - 33176 lo0
default fe80::464e:6dff:fe87:a0c8 UGS - - 1480 awge0
::1 lo0 UHl - - 33176 lo0
::127.0.0.0/104 ::1 UGRS - - 33176 lo0
::224.0.0.0/100 ::1 UGRS - - 33176 lo0
::255.0.0.0/104 ::1 UGRS - - 33176 lo0
::ffff:0.0.0.0/96 ::1 UGRS - - 33176 lo0
2001:470:1f0b:e84::/64 link#1 UCS - - 1480 awge0
2001:470:1f0b:e84:a982:4f01:4b81:7d8a link#1 UHl - - - lo0
2001:db8::/32 ::1 UGRS - - 33176 lo0
2002::/24 ::1 UGRS - - 33176 lo0
2002:7f00::/24 ::1 UGRS - - 33176 lo0
2002:e000::/20 ::1 UGRS - - 33176 lo0
2002:ff00::/24 ::1 UGRS - - 33176 lo0
fe80::/10 ::1 UGRS - - 33176 lo0
fe80::%awge0/64 link#1 UC - - - awge0
fe80::9a43:96ac:a66b:d416 link#1 UHl - - - lo0
fe80::%lo0/64 fe80::1 U - - - lo0
fe80::1 lo0 UHl - - - lo0
ff01:1::/32 link#1 UC - - - awge0
ff01:2::/32 ::1 UC - - 33176 lo0
ff02::%awge0/32 link#1 UC - - - awge0
ff02::%lo0/32 ::1 UC - - 33176 lo0
Martin
State-Changed-From-To: open->feedback
State-Changed-By: gutteridge@NetBSD.org
State-Changed-When: Mon, 04 Nov 2019 06:06:49 +0000
State-Changed-Why:
I've updated to a newer version of scapy, could you please re-test with it?
From: "David H. Gutteridge" <david@gutteridge.ca>
To: martin@netbsd.org, gnats-bugs@netbsd.org
Cc:
Subject: Re: pkg/54028 (net/scapy not working?)
Date: Mon, 04 Nov 2019 01:32:59 -0500
On Mon, 2019-11-04 at 06:06 +0000, gutteridge@NetBSD.org wrote:
> Synopsis: net/scapy not working?
>
> State-Changed-From-To: open->feedback
> State-Changed-By: gutteridge@NetBSD.org
> State-Changed-When: Mon, 04 Nov 2019 06:06:49 +0000
> State-Changed-Why:
> I've updated to a newer version of scapy, could you please re-test
> with it?
Something I should add: having tested it in various environments, I just
realized I hadn't tested it with Python 2.7. Naturally, it has a PLIST
issue with 2.7... So 3.6 or 3.7 are the viable ones, for now.
Dave
From: Martin Husemann <martin@duskware.de>
To: gnats-bugs@netbsd.org
Cc:
Subject: Re: pkg/54028 (net/scapy not working?)
Date: Mon, 4 Nov 2019 12:24:08 +0100
I have update all pkgs on the machine, python is now 3.7.
# scapy
INFO: Can't import matplotlib. Won't be able to plot.
INFO: Can't import PyX. Won't be able to use psdump() or pdfdump().
WARNING: No route found for IPv6 destination :: (no default route?)
INFO: Can't import python-cryptography v1.7+. Disabled WEP decryption/encryption. (Dot11)
INFO: Can't import python-cryptography v1.7+. Disabled IPsec encryption/authentication.
WARNING: IPython not available. Using standard Python shell instead.
AutoCompletion, History are disabled.
aSPY//YASa
apyyyyCY//////////YCa |
sY//////YSpcs scpCY//Pp | Welcome to Scapy
ayp ayyyyyyySCP//Pp syY//C | Version git-archive.dev304758016
AYAsAYYYYYYYY///Ps cY//S |
pCCCCY//p cSSps y//Y | https://github.com/secdev/scapy
SPPPP///a pP///AC//Y |
A//A cyP////C | Have fun!
p///Ac sC///a |
P////YCpc A//A | Craft me if you can.
scccccp///pSP///p p//Y | -- IPv6 layer
sY/////////y caa S//P |
cayCyayP//Ya pY/Ya
sY/PsY////YCc aC//Yp
sc sccaCY//PCypaapyCP//YSs
spCPY//////YPSps
ccaacs
>>>
Note the warning about the IPv6 default route
Most comands in scapy do not work (missing modules). Doing "ls()" works though.
Martin
State-Changed-From-To: feedback->open
State-Changed-By: gutteridge@NetBSD.org
State-Changed-When: Tue, 05 Nov 2019 02:25:37 +0000
State-Changed-Why:
Feedback received.
Responsible-Changed-From-To: pkg-manager->gutteridge
Responsible-Changed-By: gutteridge@NetBSD.org
Responsible-Changed-When: Tue, 05 Nov 2019 02:28:26 +0000
Responsible-Changed-Why:
Take.
>Unformatted:
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