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pkg/54028: net/scapy not working?

>Number:         54028
>Category:       pkg
>Synopsis:       net/scapy not working?
>Confidential:   no
>Severity:       serious
>Priority:       medium
>Responsible:    pkg-manager
>State:          open
>Class:          sw-bug
>Submitter-Id:   net
>Arrival-Date:   Fri Mar 01 11:10:01 +0000 2019
>Originator:     Martin Husemann
>Release:        NetBSD 8.99.34
The NetBSD Foundation, Inc.
System: NetBSD 8.99.34 NetBSD 8.99.34 (SUNXI) #33: Tue Feb 26 07:40:08 CET 2019 evbarm
Architecture: earmv7hfeb
Machine: evbarm

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 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

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



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