VTL: Fix issue with ipaddress library use under python2.

If you pass in a non-unicode 4-byte ipv6 address to ip_address,
ipaddress interprets this as an IPv4Address.

Under python2, ip_address  interprets 'a7::' as a packed ipv4:
 97.55.58.58

You can test with:
---
import ipaddress
try:
    text_type = unicode
except NameError:
    text_type = str

addr = ipaddress.ip_address('a7::')
print(addr)
---

Change-Id: I06c561e0ab7315869cc89d0bb08c05e743a90982
Signed-off-by: Paul Vinciguerra <pvinci@vinciconsulting.com>

1 files changed, 5 insertions, 0 deletions

diff --git a/test/hook.py b/test/hook.py
index a8f37c7a35b..64fc076c1a0 100644
--- a/test/hook.py
+++ b/test/hook.py
@@ -6,6 +6,10 @@ from log import RED, single_line_delim, double_line_delim
 import ipaddress
 from subprocess import check_output, CalledProcessError
 from util import check_core_path, get_core_path
+try:
+    text_type = unicode
+except NameError:
+    text_type = str
 
 
 class Hook(object):
@@ -32,6 +36,7 @@ class Hook(object):
                 return '{!s} ({!s})'.format(val, ':'.join(['{:02x}'.format(
                     ord(x)) for x in val]))
             try:
+                # we don't call test_type(val) because it is a packed value.
                 return '{!s} ({!s})'.format(val, str(
                     ipaddress.ip_address(val)))
             except ipaddress.AddressValueError: