ip: Router ID included in flow hash

[vpp.git] / test / util.py

diff --git a/test/util.py b/test/util.py
index ed6c409..e21fdb8 100644 (file)
--- a/test/util.py
+++ b/test/util.py
@@ -1,9 +1,10 @@
 """ test framework utilities """
 
 import abc
+import ipaddress
+import logging
 import socket
 from socket import AF_INET6
-import six
 import sys
 import os.path
 
@@ -19,6 +20,10 @@ from scapy.utils6 import in6_mactoifaceid
 from io import BytesIO
 from vpp_papi import mac_pton
 
+# Set up an empty logger for the testcase that can be overridden as necessary
+null_logger = logging.getLogger('VppTestCase.util')
+null_logger.addHandler(logging.NullHandler())
+
 
 def ppp(headline, packet):
     """ Return string containing the output of scapy packet.show() call. """
@@ -50,10 +55,21 @@ def ip4_range(ip4, s, e):
     return ("%s.%d" % (tmp, i) for i in range(s, e))
 
 
-def ip4n_range(ip4n, s, e):
-    ip4 = socket.inet_ntop(socket.AF_INET, ip4n)
-    return (socket.inet_pton(socket.AF_INET, ip)
-            for ip in ip4_range(ip4, s, e))
+def mcast_ip_to_mac(ip):
+    ip = ipaddress.ip_address(ip)
+    if not ip.is_multicast:
+        raise ValueError("Must be multicast address.")
+    ip_as_int = int(ip)
+    if ip.version == 4:
+        mcast_mac = "01:00:5e:%02x:%02x:%02x" % ((ip_as_int >> 16) & 0x7f,
+                                                 (ip_as_int >> 8) & 0xff,
+                                                 ip_as_int & 0xff)
+    else:
+        mcast_mac = "33:33:%02x:%02x:%02x:%02x" % ((ip_as_int >> 24) & 0xff,
+                                                   (ip_as_int >> 16) & 0xff,
+                                                   (ip_as_int >> 8) & 0xff,
+                                                   ip_as_int & 0xff)
+    return mcast_mac
 
 
 # wrapper around scapy library function.
@@ -96,7 +112,7 @@ def check_core_path(logger, core_path):
             "   current core pattern is: %s" % corefmt)
 
 
-class NumericConstant(object):
+class NumericConstant:
 
     desc_dict = {}
 
@@ -115,7 +131,7 @@ class NumericConstant(object):
         return ""
 
 
-class Host(object):
+class Host:
     """ Generic test host "connected" to VPPs interface. """
 
     @property
@@ -187,19 +203,6 @@ class Host(object):
         self._ip6_ll = ip6_ll
 
 
-class ForeignAddressFactory(object):
-    count = 0
-    prefix_len = 24
-    net_template = '10.10.10.{}'
-    net = net_template.format(0) + '/' + str(prefix_len)
-
-    def get_ip4(self):
-        if self.count > 255:
-            raise Exception("Network host address exhaustion")
-        self.count += 1
-        return self.net_template.format(self.count)
-
-
 class L4_Conn():
     """ L4 'connection' tied to two VPP interfaces """
 
@@ -260,20 +263,7 @@ class L4_CONN_SIDE:
     L4_CONN_SIDE_ONE = 1
 
 
-class LoggerWrapper(object):
-    def __init__(self, logger=None):
-        self._logger = logger
-
-    def debug(self, *args, **kwargs):
-        if self._logger:
-            self._logger.debug(*args, **kwargs)
-
-    def error(self, *args, **kwargs):
-        if self._logger:
-            self._logger.error(*args, **kwargs)
-
-
-def fragment_rfc791(packet, fragsize, _logger=None):
+def fragment_rfc791(packet, fragsize, logger=null_logger):
     """
     Fragment an IPv4 packet per RFC 791
     :param packet: packet to fragment
@@ -281,7 +271,6 @@ def fragment_rfc791(packet, fragsize, _logger=None):
     :note: IP options are not supported
     :returns: list of fragments
     """
-    logger = LoggerWrapper(_logger)
     logger.debug(ppp("Fragmenting packet:", packet))
     packet = packet.__class__(scapy.compat.raw(packet))  # recalc. all values
     if len(packet[IP].options) > 0:
@@ -298,7 +287,7 @@ def fragment_rfc791(packet, fragsize, _logger=None):
     pkts = []
     ihl = packet[IP].ihl
     otl = len(packet[IP])
-    nfb = (fragsize - pre_ip_len - ihl * 4) / 8
+    nfb = int((fragsize - pre_ip_len - ihl * 4) / 8)
     fo = packet[IP].frag
 
     p = packet.__class__(hex_headers + hex_payload[:nfb * 8])
@@ -313,13 +302,13 @@ def fragment_rfc791(packet, fragsize, _logger=None):
     p[IP].frag = fo + nfb
     del p[IP].chksum
 
-    more_fragments = fragment_rfc791(p, fragsize, _logger)
+    more_fragments = fragment_rfc791(p, fragsize, logger)
     pkts.extend(more_fragments)
 
     return pkts
 
 
-def fragment_rfc8200(packet, identification, fragsize, _logger=None):
+def fragment_rfc8200(packet, identification, fragsize, logger=null_logger):
     """
     Fragment an IPv6 packet per RFC 8200
     :param packet: packet to fragment
@@ -327,7 +316,6 @@ def fragment_rfc8200(packet, identification, fragsize, _logger=None):
     :note: IP options are not supported
     :returns: list of fragments
     """
-    logger = LoggerWrapper(_logger)
     packet = packet.__class__(scapy.compat.raw(packet))  # recalc. all values
     if len(packet) <= fragsize:
         return [packet]
@@ -406,7 +394,7 @@ def fragment_rfc8200(packet, identification, fragsize, _logger=None):
     del p[IPv6].nh
     p = p / fragment_ext_hdr
     del p[IPv6ExtHdrFragment].nh
-    first_payload_len_nfb = (fragsize - len(p)) / 8
+    first_payload_len_nfb = int((fragsize - len(p)) / 8)
     p = p / Raw(hex_payload[:first_payload_len_nfb * 8])
     del p[IPv6].plen
     p[IPv6ExtHdrFragment].nh = orig_nh
@@ -424,11 +412,11 @@ def fragment_rfc8200(packet, identification, fragsize, _logger=None):
         del p[IPv6].nh
         p = p / fragment_ext_hdr
         del p[IPv6ExtHdrFragment].nh
-        l_nfb = (fragsize - len(p)) / 8
+        l_nfb = int((fragsize - len(p)) / 8)
         p = p / Raw(hex_payload[offset:offset + l_nfb * 8])
         p[IPv6ExtHdrFragment].nh = orig_nh
         p[IPv6ExtHdrFragment].id = identification
-        p[IPv6ExtHdrFragment].offset = offset / 8
+        p[IPv6ExtHdrFragment].offset = int(offset / 8)
         p[IPv6ExtHdrFragment].m = 1
         p = p.__class__(scapy.compat.raw(p))
         logger.debug(ppp("Fragment %s:" % len(pkts), p))