tests: Add ip6_route_zebra lib function

Add a common function to retrieve and canonicalize
'show ipv6 route' output for use in topotests. Use that in
the test_ospf6_topo1 test; update the corresponding 'expected'
results files to match the lib function.

Replace some 'print' with 'logger' statements in that test also.

Signed-off-by: Mark Stapp <mjs@voltanet.io>

1 files changed, 27 insertions, 0 deletions

diff --git a/tests/topotests/lib/topotest.py b/tests/topotests/lib/topotest.py
index e0da20e07f..2acb04fb0e 100644
--- a/tests/topotests/lib/topotest.py
+++ b/tests/topotests/lib/topotest.py
@@ -429,6 +429,33 @@ def ip4_route_zebra(node, vrf_name=None):
         lines = lines[1:]
     return '\n'.join(lines)
 
+def ip6_route_zebra(node, vrf_name=None):
+    """
+    Retrieves the output of 'show ipv6 route [vrf vrf_name]', then
+    canonicalizes it by eliding link-locals.
+    """
+
+    if vrf_name == None:
+        tmp = node.vtysh_cmd('show ipv6 route')
+    else:
+        tmp = node.vtysh_cmd('show ipv6 route vrf {0}'.format(vrf_name))
+
+    # Mask out timestamp
+    output = re.sub(r" [0-2][0-9]:[0-5][0-9]:[0-5][0-9]", " XX:XX:XX", tmp)
+
+    # Mask out the link-local addresses
+    output = re.sub(r'fe80::[^ ]+,', 'fe80::XXXX:XXXX:XXXX:XXXX,', output)
+
+    lines = output.splitlines()
+    header_found = False
+    while lines and (not lines[0].strip() or not header_found):
+        if '> - selected route' in lines[0]:
+            header_found = True
+        lines = lines[1:]
+
+    return '\n'.join(lines)
+
+
 def proto_name_to_number(protocol):
     return {
         'bgp':    '186',