FIX: use correct slicing of classify mask/match string 57/20557/7
authorJan Gelety <jgelety@cisco.com>
Tue, 9 Jul 2019 10:41:23 +0000 (12:41 +0200)
committerJan Gelety <jgelety@cisco.com>
Wed, 10 Jul 2019 14:40:48 +0000 (14:40 +0000)
Change-Id: I11cc8ddc6925b44a596aa03d71318efd76232d6d
Signed-off-by: Jan Gelety <jgelety@cisco.com>
resources/libraries/python/Classify.py

index 1938688..2b9ab3d 100644 (file)
@@ -16,7 +16,7 @@
 import binascii
 import re
 
-from socket import AF_INET, AF_INET6, inet_aton, inet_pton
+from ipaddress import ip_address
 
 from robot.api import logger
 
@@ -40,9 +40,16 @@ class Classify(object):
         :returns MAC ACL mask in hexstring format.
         :rtype: str
         """
+        if ether_type:
+            end = 28
+        elif src_mac:
+            end = 24
+        else:
+            end = 12
+
         return ('{!s:0>12}{!s:0>12}{!s:0>4}'.format(
-            dst_mac.replace(':', ''), src_mac.replace(':', ''), ether_type)).\
-            rstrip('0')
+            dst_mac.replace(':', ''), src_mac.replace(':', ''),
+            ether_type))[0:end]
 
     @staticmethod
     def _build_ip_mask(proto='', src_ip='', dst_ip='', src_port='',
@@ -62,8 +69,19 @@ class Classify(object):
         :returns: IP mask in hexstring format.
         :rtype: str
         """
+        if dst_port:
+            end = 48
+        elif src_port:
+            end = 44
+        elif dst_ip:
+            end = 40
+        elif src_ip:
+            end = 32
+        else:
+            end = 20
+
         return ('{!s:0>20}{!s:0>12}{!s:0>8}{!s:0>4}{!s:0>4}'.format(
-            proto, src_ip, dst_ip, src_port, dst_port)).rstrip('0')
+            proto, src_ip, dst_ip, src_port, dst_port))[0:end]
 
     @staticmethod
     def _build_ip6_mask(next_hdr='', src_ip='', dst_ip='', src_port='',
@@ -83,8 +101,19 @@ class Classify(object):
         :returns: IPv6 ACL mask in hexstring format.
         :rtype: str
         """
+        if dst_port:
+            end = 88
+        elif src_port:
+            end = 84
+        elif dst_ip:
+            end = 80
+        elif src_ip:
+            end = 48
+        else:
+            end = 14
+
         return ('{!s:0>14}{!s:0>34}{!s:0>32}{!s:0>4}{!s:0>4}'.format(
-            next_hdr, src_ip, dst_ip, src_port, dst_port)).rstrip('0')
+            next_hdr, src_ip, dst_ip, src_port, dst_port))[0:end]
 
     @staticmethod
     def _build_mac_match(dst_mac='', src_mac='', ether_type=''):
@@ -99,13 +128,16 @@ class Classify(object):
         :returns: MAC ACL match data in hexstring format.
         :rtype: str
         """
-        if dst_mac:
-            dst_mac = dst_mac.replace(':', '')
-        if src_mac:
-            src_mac = src_mac.replace(':', '')
+        if ether_type:
+            end = 28
+        elif src_mac:
+            end = 24
+        else:
+            end = 12
 
         return ('{!s:0>12}{!s:0>12}{!s:0>4}'.format(
-            dst_mac, src_mac, ether_type)).rstrip('0')
+            dst_mac.replace(':', ''), src_mac.replace(':', ''),
+            ether_type))[0:end]
 
     @staticmethod
     def _build_ip_match(proto=0, src_ip='', dst_ip='', src_port=0, dst_port=0):
@@ -125,13 +157,23 @@ class Classify(object):
         :rtype: str
         """
         if src_ip:
-            src_ip = binascii.hexlify(inet_aton(src_ip))
+            src_ip = binascii.hexlify(ip_address(unicode(src_ip)).packed)
         if dst_ip:
-            dst_ip = binascii.hexlify(inet_aton(dst_ip))
+            dst_ip = binascii.hexlify(ip_address(unicode(dst_ip)).packed)
+        if dst_port:
+            end = 48
+        elif src_port:
+            end = 44
+        elif dst_ip:
+            end = 40
+        elif src_ip:
+            end = 32
+        else:
+            end = 20
 
         return ('{!s:0>20}{!s:0>12}{!s:0>8}{!s:0>4}{!s:0>4}'.format(
             hex(proto)[2:], src_ip, dst_ip, hex(src_port)[2:],
-            hex(dst_port)[2:])).rstrip('0')
+            hex(dst_port)[2:]))[0:end]
 
     @staticmethod
     def _build_ip6_match(next_hdr=0, src_ip='', dst_ip='', src_port=0,
@@ -139,9 +181,9 @@ class Classify(object):
         """Build IPv6 ACL match data in hexstring format.
 
         :param next_hdr: Next header number with valid option "x".
-        :param src_ip: Source ip6 address with format of "xxx:xxxx::xxxx".
+        :param src_ip: Source ip6 address with format of "xxxx:xxxx::xxxx".
         :param dst_ip: Destination ip6 address with format of
-            "xxx:xxxx::xxxx".
+            "xxxx:xxxx::xxxx".
         :param src_port: Source port number "x".
         :param dst_port: Destination port number "x".
         :type next_hdr: int
@@ -153,13 +195,23 @@ class Classify(object):
         :rtype: str
         """
         if src_ip:
-            src_ip = binascii.hexlify(inet_pton(AF_INET6, src_ip))
+            src_ip = binascii.hexlify(ip_address(unicode(src_ip)).packed)
         if dst_ip:
-            dst_ip = binascii.hexlify(inet_pton(AF_INET6, dst_ip))
+            dst_ip = binascii.hexlify(ip_address(unicode(dst_ip)).packed)
+        if dst_port:
+            end = 88
+        elif src_port:
+            end = 84
+        elif dst_ip:
+            end = 80
+        elif src_ip:
+            end = 48
+        else:
+            end = 14
 
         return ('{!s:0>14}{!s:0>34}{!s:0>32}{!s:0>4}{!s:0>4}'.format(
             hex(next_hdr)[2:], src_ip, dst_ip, hex(src_port)[2:],
-            hex(dst_port)[2:])).rstrip('0')
+            hex(dst_port)[2:]))[0:end]
 
     @staticmethod
     def _classify_add_del_table(node, is_add, mask, match_n_vectors=1,
@@ -415,10 +467,8 @@ class Classify(object):
             ip4=Classify._build_ip_mask,
             ip6=Classify._build_ip6_mask
         )
-        if ip_version == "ip4":
-            ip_addr = binascii.hexlify(inet_aton(ip_addr))
-        elif ip_version == "ip6":
-            ip_addr = binascii.hexlify(inet_pton(AF_INET6, ip_addr))
+        if ip_version == "ip4" or ip_version == "ip6":
+            ip_addr = binascii.hexlify(ip_address(unicode(ip_addr)).packed)
         else:
             raise ValueError("IP version {ver} is not supported.".
                              format(ver=ip_version))
@@ -785,15 +835,13 @@ class Classify(object):
             groups = re.search(reg_ex_src_ip, rule)
             if groups:
                 grp = groups.group(1).split(' ')[1].split('/')
-                acl_rule["src_ip_addr"] = str(inet_pton(
-                    AF_INET6 if acl_rule["is_ipv6"] else AF_INET, grp[0]))
+                acl_rule["src_ip_addr"] = ip_address(unicode(grp[0])).packed
                 acl_rule["src_ip_prefix_len"] = int(grp[1])
 
             groups = re.search(reg_ex_dst_ip, rule)
             if groups:
                 grp = groups.group(1).split(' ')[1].split('/')
-                acl_rule["dst_ip_addr"] = str(inet_pton(
-                    AF_INET6 if acl_rule["is_ipv6"] else AF_INET, grp[0]))
+                acl_rule["dst_ip_addr"] = ip_address(unicode(grp[0])).packed
                 acl_rule["dst_ip_prefix_len"] = int(grp[1])
 
             groups = re.search(reg_ex_sport, rule)
@@ -846,8 +894,7 @@ class Classify(object):
             groups = re.search(reg_ex_ip, rule)
             if groups:
                 grp = groups.group(1).split(' ')[1].split('/')
-                acl_rule["src_ip_addr"] = str(inet_pton(
-                    AF_INET6 if acl_rule["is_ipv6"] else AF_INET, grp[0]))
+                acl_rule["src_ip_addr"] = ip_address(unicode(grp[0])).packed
                 acl_rule["src_ip_prefix_len"] = int(grp[1])
 
             acl_rules.append(acl_rule)

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