[scapy] update scapy to 2.4.5 and patch it

[stepanblyschak]

Signed-off-by: Stepan Blyschak stepanb@nvidia.com

Why I did it

Running warm-reboot in a loop for 500 times leads to this error on 318-th iteration:

Apr  2 15:56:27.346747 sonic INFO swss#/supervisord: restore_neighbors Traceback (most recent call last):
Apr  2 15:56:27.346747 sonic INFO swss#/supervisord: restore_neighbors   File "/usr/bin/restore_neighbors.py", line 24, in <module>
Apr  2 15:56:27.346747 sonic INFO swss#/supervisord: restore_neighbors     from scapy.all import conf, in6_getnsma, inet_pton, inet_ntop, in6_getnsmac, get_if_hwaddr, Ether, ARP, IPv6, ICMPv6ND_NS, ICMPv6NDOptSrcLLAddr
Apr  2 15:56:27.346795 sonic INFO swss#/supervisord: restore_neighbors   File "/usr/local/lib/python3.7/dist-packages/scapy/all.py", line 25, in <module>
Apr  2 15:56:27.346956 sonic INFO swss#/supervisord: restore_neighbors     from scapy.route import *
Apr  2 15:56:27.346995 sonic INFO swss#/supervisord: restore_neighbors   File "/usr/local/lib/python3.7/dist-packages/scapy/route.py", line 205, in <module>
Apr  2 15:56:27.347089 sonic INFO swss#/supervisord: restore_neighbors     conf.iface = get_working_if()
Apr  2 15:56:27.347129 sonic INFO swss#/supervisord: restore_neighbors   File "/usr/local/lib/python3.7/dist-packages/scapy/arch/linux.py", line 128, in get_working_if
Apr  2 15:56:27.347213 sonic INFO swss#/supervisord: restore_neighbors     ifflags = struct.unpack("16xH14x", get_if(i, SIOCGIFFLAGS))[0]
Apr  2 15:56:27.347250 sonic INFO swss#/supervisord: restore_neighbors   File "/usr/local/lib/python3.7/dist-packages/scapy/arch/common.py", line 31, in get_if
Apr  2 15:56:27.347345 sonic INFO swss#/supervisord: restore_neighbors     return ioctl(sck, cmd, struct.pack("16s16x", iff.encode("utf8")))
Apr  2 15:56:27.347365 sonic INFO swss#/supervisord: restore_neighbors OSError: [Errno 19] No such device

The issue was reported to scapy devs secdev/scapy#3369, the fix is secdev/scapy#3371, however there is no released scapy version with this fix right now, thus decided to build scapy v2.4.5 from sources and apply the fix in a form of a patch.

How I did it

Added scapy as a submodule and applied the fix.

How to verify it

Run warm-reboot in a loop

Which release branch to backport (provide reason below if selected)

• 201811
• 201911
• 202006
• 202012
• 202106
• 202111

Description for the changelog

Link to config_db schema for YANG module changes

A picture of a cute animal (not mandatory but encouraged)

[liat-grozovik]

/azp run Azure.sonic-buildimage

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