sw test tool: Modify lengths of pad fields for ARP

Wireshark may misunderstand a MAC frame (including ARP) whose length is 64 bytes or more, as a frame with the FCS field. This patch fixes the issue by modifying lengths of pad fields for ARP. This patch modifies lengths of pad fields as follows: - Add 18 bytes for MAC frames (including ARP, without VLAN/MPLS/PBB). - Add 18 bytes for MAC frames related to POP_MPLS/POP_PBB. Reported-by: Arne Goetje <arne_goetje@accton.com> Signed-off-by: Yuichi Ito <ito.yuichi0@gmail.com> Signed-off-by: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp>
author: Yuichi Ito <ito.yuichi0@gmail.com> 2014-04-25 18:44:59 +0900
committer: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp> 2014-04-25 18:49:44 +0900
commit: 56528cfd002ac33ec8680b4a34ddb20719c1d3ec (patch)
tree: c4c9d086c8e7cbe14c9b8f763bab3ac8476e5946
parent: 8ac3968af4d3e4710495edf004366393f04d8c0f (diff)
34 files changed, 235 insertions, 235 deletions
diff --git a/ryu/tests/switch/of13/action/00_OUTPUT.json b/ryu/tests/switch/of13/action/00_OUTPUT.json
index 8f786682..65b4f6ff 100644
--- a/ryu/tests/switch/of13/action/00_OUTPUT.json
+++ b/ryu/tests/switch/of13/action/00_OUTPUT.json
@@ -109,12 +109,12 @@
                 "ingress":[
                     "ethernet(dst='22:22:22:22:22:22', src='12:11:11:11:11:11', ethertype=2054)",
                     "arp(dst_ip='192.168.20.20',dst_mac='22:22:22:22:22:22', opcode=1, src_ip='192.168.10.10',src_mac='12:11:11:11:11:11')",
-                    "'\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00'"
+                    "str(\"\\x00\" * (60 - 42))"
                 ],
                 "egress":[
                     "ethernet(dst='22:22:22:22:22:22', src='12:11:11:11:11:11', ethertype=2054)",
                     "arp(dst_ip='192.168.20.20',dst_mac='22:22:22:22:22:22', opcode=1, src_ip='192.168.10.10',src_mac='12:11:11:11:11:11')",
-                    "'\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00'"
+                    "str(\"\\x00\" * (60 - 42))"
                 ]
             }
         ]
diff --git a/ryu/tests/switch/of13/action/17_PUSH_VLAN.json b/ryu/tests/switch/of13/action/17_PUSH_VLAN.json
index 0af57611..b2e15feb 100644
--- a/ryu/tests/switch/of13/action/17_PUSH_VLAN.json
+++ b/ryu/tests/switch/of13/action/17_PUSH_VLAN.json
@@ -161,13 +161,13 @@
                 "ingress":[
                     "ethernet(dst='22:22:22:22:22:22', src='12:11:11:11:11:11', ethertype=2054)",
                     "arp(dst_ip='192.168.20.20',dst_mac='22:22:22:22:22:22', opcode=1, src_ip='192.168.10.10',src_mac='12:11:11:11:11:11')",
-                    "'\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00'"
+                    "str(\"\\x00\" * (60 - 42))"
                 ],
                 "egress":[
                     "ethernet(dst='22:22:22:22:22:22', src='12:11:11:11:11:11', ethertype=33024)",
                     "vlan(ethertype=2054)",
                     "arp(dst_ip='192.168.20.20',dst_mac='22:22:22:22:22:22', opcode=1, src_ip='192.168.10.10',src_mac='12:11:11:11:11:11')",
-                    "'\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00'"
+                    "str(\"\\x00\" * (60 - 42))"
                 ]
             }
         ]
diff --git a/ryu/tests/switch/of13/action/18_POP_VLAN.json b/ryu/tests/switch/of13/action/18_POP_VLAN.json
index a9b8430d..aface7ff 100644
--- a/ryu/tests/switch/of13/action/18_POP_VLAN.json
+++ b/ryu/tests/switch/of13/action/18_POP_VLAN.json
@@ -177,12 +177,12 @@
                     "ethernet(dst='22:22:22:22:22:22', src='12:11:11:11:11:11', ethertype=33024)",
                     "vlan(pcp=3, cfi=0, vid=100, ethertype=2054)",
                     "arp(dst_ip='192.168.20.20',dst_mac='22:22:22:22:22:22', opcode=1, src_ip='192.168.10.10',src_mac='12:11:11:11:11:11')",
-                    "'\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00'"
+                    "str(\"\\x00\" * (60 - 42))"
                 ],
                 "egress":[
                     "ethernet(dst='22:22:22:22:22:22', src='12:11:11:11:11:11', ethertype=2054)",
                     "arp(dst_ip='192.168.20.20',dst_mac='22:22:22:22:22:22', opcode=1, src_ip='192.168.10.10',src_mac='12:11:11:11:11:11')",
-                    "'\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00'"
+                    "str(\"\\x00\" * (60 - 42))"
                 ]
             }
         ]
diff --git a/ryu/tests/switch/of13/action/19_PUSH_MPLS.json b/ryu/tests/switch/of13/action/19_PUSH_MPLS.json
index 64b8028c..2eee31cb 100644
--- a/ryu/tests/switch/of13/action/19_PUSH_MPLS.json
+++ b/ryu/tests/switch/of13/action/19_PUSH_MPLS.json
@@ -161,13 +161,13 @@
                 "ingress":[
                     "ethernet(dst='22:22:22:22:22:22', src='12:11:11:11:11:11', ethertype=2054)",
                     "arp(dst_ip='192.168.20.20',dst_mac='22:22:22:22:22:22', opcode=1, src_ip='192.168.10.10',src_mac='12:11:11:11:11:11')",
-                    "'\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00'"
+                    "str(\"\\x00\" * (60 - 42))"
                 ],
                 "egress":[
                     "ethernet(dst='22:22:22:22:22:22', src='12:11:11:11:11:11', ethertype=34887)",
                     "mpls(ttl=0)",
                     "arp(dst_ip='192.168.20.20',dst_mac='22:22:22:22:22:22', opcode=1, src_ip='192.168.10.10',src_mac='12:11:11:11:11:11')",
-                    "'\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00'"
+                    "str(\"\\x00\" * (60 - 42))"
                 ]
             }
         ]
diff --git a/ryu/tests/switch/of13/action/20_POP_MPLS.json b/ryu/tests/switch/of13/action/20_POP_MPLS.json
index c8ec8752..8bc70a5c 100644
--- a/ryu/tests/switch/of13/action/20_POP_MPLS.json
+++ b/ryu/tests/switch/of13/action/20_POP_MPLS.json
@@ -162,12 +162,12 @@
                     "ethernet(dst='22:22:22:22:22:22', src='12:11:11:11:11:11', ethertype=34887)",
                     "mpls(bsb=1, label=100, exp=3, ttl=64)",
                     "arp(dst_ip='192.168.20.20',dst_mac='22:22:22:22:22:22', opcode=1, src_ip='192.168.10.10',src_mac='12:11:11:11:11:11')",
-                    "'\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00'"
+                    "str(\"\\x00\" * (60 - 42))"
                 ],
                 "egress":[
                     "ethernet(dst='22:22:22:22:22:22', src='12:11:11:11:11:11', ethertype=2054)",
                     "arp(dst_ip='192.168.20.20',dst_mac='22:22:22:22:22:22', opcode=1, src_ip='192.168.10.10',src_mac='12:11:11:11:11:11')",
-                    "'\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00'"
+                    "str(\"\\x00\" * (60 - 42))"
                 ]
             }
         ]
diff --git a/ryu/tests/switch/of13/action/25_SET_FIELD/03_ETH_DST.json b/ryu/tests/switch/of13/action/25_SET_FIELD/03_ETH_DST.json
index c193dd93..db9e3b51 100644
--- a/ryu/tests/switch/of13/action/25_SET_FIELD/03_ETH_DST.json
+++ b/ryu/tests/switch/of13/action/25_SET_FIELD/03_ETH_DST.json
@@ -174,12 +174,12 @@
                 "ingress":[
                     "ethernet(dst='22:22:22:22:22:22', src='12:11:11:11:11:11', ethertype=2054)",
                     "arp(dst_ip='192.168.20.20',dst_mac='22:22:22:22:22:22', opcode=1, src_ip='192.168.10.10',src_mac='12:11:11:11:11:11')",
-                    "'\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00'"
+                    "str(\"\\x00\" * (60 - 42))"
                 ],
                 "egress":[
                     "ethernet(dst='ba:bb:bb:bb:bb:bb', src='12:11:11:11:11:11', ethertype=2054)",
                     "arp(dst_ip='192.168.20.20',dst_mac='22:22:22:22:22:22', opcode=1, src_ip='192.168.10.10',src_mac='12:11:11:11:11:11')",
-                    "'\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00'"
+                    "str(\"\\x00\" * (60 - 42))"
                 ]
             }
         ]
diff --git a/ryu/tests/switch/of13/action/25_SET_FIELD/04_ETH_SRC.json b/ryu/tests/switch/of13/action/25_SET_FIELD/04_ETH_SRC.json
index bd77a138..56d34ac4 100644
--- a/ryu/tests/switch/of13/action/25_SET_FIELD/04_ETH_SRC.json
+++ b/ryu/tests/switch/of13/action/25_SET_FIELD/04_ETH_SRC.json
@@ -174,12 +174,12 @@
                 "ingress":[
                     "ethernet(dst='22:22:22:22:22:22', src='12:11:11:11:11:11', ethertype=2054)",
                     "arp(dst_ip='192.168.20.20',dst_mac='22:22:22:22:22:22', opcode=1, src_ip='192.168.10.10',src_mac='12:11:11:11:11:11')",
-                    "'\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00'"
+                    "str(\"\\x00\" * (60 - 42))"
                 ],
                 "egress":[
                     "ethernet(dst='22:22:22:22:22:22', src='aa:aa:aa:aa:aa:aa', ethertype=2054)",
                     "arp(dst_ip='192.168.20.20',dst_mac='22:22:22:22:22:22', opcode=1, src_ip='192.168.10.10',src_mac='12:11:11:11:11:11')",
-                    "'\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00'"
+                    "str(\"\\x00\" * (60 - 42))"
                 ]
             }
         ]
diff --git a/ryu/tests/switch/of13/action/25_SET_FIELD/05_ETH_TYPE.json b/ryu/tests/switch/of13/action/25_SET_FIELD/05_ETH_TYPE.json
index bdaca944..f88fda8c 100644
--- a/ryu/tests/switch/of13/action/25_SET_FIELD/05_ETH_TYPE.json
+++ b/ryu/tests/switch/of13/action/25_SET_FIELD/05_ETH_TYPE.json
@@ -174,12 +174,12 @@
                 "ingress":[
                     "ethernet(dst='22:22:22:22:22:22', src='12:11:11:11:11:11', ethertype=2054)",
                     "arp(dst_ip='192.168.20.20',dst_mac='22:22:22:22:22:22', opcode=1, src_ip='192.168.10.10',src_mac='12:11:11:11:11:11')",
-                    "'\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00'"
+                    "str(\"\\x00\" * (60 - 42))"
                 ],
                 "egress":[
                     "ethernet(dst='22:22:22:22:22:22', src='12:11:11:11:11:11', ethertype=34888)",
                     "arp(dst_ip='192.168.20.20',dst_mac='22:22:22:22:22:22', opcode=1, src_ip='192.168.10.10',src_mac='12:11:11:11:11:11')",
-                    "'\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00'"
+                    "str(\"\\x00\" * (60 - 42))"
                 ]
             }
         ]
diff --git a/ryu/tests/switch/of13/action/25_SET_FIELD/21_ARP_OP.json b/ryu/tests/switch/of13/action/25_SET_FIELD/21_ARP_OP.json
index 823b1fad..573b2609 100644
--- a/ryu/tests/switch/of13/action/25_SET_FIELD/21_ARP_OP.json
+++ b/ryu/tests/switch/of13/action/25_SET_FIELD/21_ARP_OP.json
@@ -56,12 +56,12 @@
                 "ingress":[
                     "ethernet(dst='22:22:22:22:22:22', src='12:11:11:11:11:11', ethertype=2054)",
                     "arp(dst_ip='192.168.20.20',dst_mac='22:22:22:22:22:22', opcode=1, src_ip='192.168.10.10',src_mac='12:11:11:11:11:11')",
-                    "'\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00'"
+                    "str(\"\\x00\" * (60 - 42))"
                 ],
                 "egress":[
                     "ethernet(dst='22:22:22:22:22:22', src='12:11:11:11:11:11', ethertype=2054)",
                     "arp(dst_ip='192.168.20.20',dst_mac='22:22:22:22:22:22', opcode=2, src_ip='192.168.10.10',src_mac='12:11:11:11:11:11')",
-                    "'\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00'"
+                    "str(\"\\x00\" * (60 - 42))"
                 ]
             }
         ]
@@ -227,12 +227,12 @@
                     "ethernet(dst='22:22:22:22:22:22', src='12:11:11:11:11:11', ethertype=34887)",
                     "mpls(bsb=1, label=100, exp=3, ttl=64)",
                     "arp(dst_ip='192.168.20.20',dst_mac='22:22:22:22:22:22', opcode=1, src_ip='192.168.10.10',src_mac='12:11:11:11:11:11')",
-                    "'\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00'"
+                    "str(\"\\x00\" * (60 - 42))"
                 ],
                 "egress":[
                     "ethernet(dst='22:22:22:22:22:22', src='12:11:11:11:11:11', ethertype=2054)",
                     "arp(dst_ip='192.168.20.20',dst_mac='22:22:22:22:22:22', opcode=2, src_ip='192.168.10.10',src_mac='12:11:11:11:11:11')",
-                    "'\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00'"
+                    "str(\"\\x00\" * (60 - 42))"
                 ]
             }
         ]
@@ -329,12 +329,12 @@
                     "itag(sid=100)",
                     "ethernet(dst='22:22:22:22:22:22', src='12:11:11:11:11:11', ethertype=2054)",
                     "arp(dst_ip='192.168.20.20',dst_mac='22:22:22:22:22:22', opcode=1, src_ip='192.168.10.10',src_mac='12:11:11:11:11:11')",
-                    "'\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00'"
+                    "str(\"\\x00\" * (60 - 42))"
                 ],
                 "egress":[
                     "ethernet(dst='22:22:22:22:22:22', src='12:11:11:11:11:11', ethertype=2054)",
                     "arp(dst_ip='192.168.20.20',dst_mac='22:22:22:22:22:22', opcode=2, src_ip='192.168.10.10',src_mac='12:11:11:11:11:11')",
-                    "'\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00'"
+                    "str(\"\\x00\" * (60 - 42))"
                 ]
             }
         ]
diff --git a/ryu/tests/switch/of13/action/25_SET_FIELD/22_ARP_SPA.json b/ryu/tests/switch/of13/action/25_SET_FIELD/22_ARP_SPA.json
index 2dadd48f..89a6c9f8 100644
--- a/ryu/tests/switch/of13/action/25_SET_FIELD/22_ARP_SPA.json
+++ b/ryu/tests/switch/of13/action/25_SET_FIELD/22_ARP_SPA.json
@@ -56,12 +56,12 @@
                 "ingress":[
                     "ethernet(dst='22:22:22:22:22:22', src='12:11:11:11:11:11', ethertype=2054)",
                     "arp(dst_ip='192.168.20.20',dst_mac='22:22:22:22:22:22', opcode=1, src_ip='192.168.10.10',src_mac='12:11:11:11:11:11')",
-                    "'\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00'"
+                    "str(\"\\x00\" * (60 - 42))"
                 ],
                 "egress":[
                     "ethernet(dst='22:22:22:22:22:22', src='12:11:11:11:11:11', ethertype=2054)",
                     "arp(dst_ip='192.168.20.20',dst_mac='22:22:22:22:22:22', opcode=1, src_ip='10.10.10.10',src_mac='12:11:11:11:11:11')",
-                    "'\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00'"
+                    "str(\"\\x00\" * (60 - 42))"
                 ]
             }
         ]
@@ -227,12 +227,12 @@
                     "ethernet(dst='22:22:22:22:22:22', src='12:11:11:11:11:11', ethertype=34887)",
                     "mpls(bsb=1, label=100, exp=3, ttl=64)",
                     "arp(dst_ip='192.168.20.20',dst_mac='22:22:22:22:22:22', opcode=1, src_ip='192.168.10.10',src_mac='12:11:11:11:11:11')",
-                    "'\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00'"
+                    "str(\"\\x00\" * (60 - 42))"
                 ],
                 "egress":[
                     "ethernet(dst='22:22:22:22:22:22', src='12:11:11:11:11:11', ethertype=2054)",
                     "arp(dst_ip='192.168.20.20',dst_mac='22:22:22:22:22:22', opcode=1, src_ip='10.10.10.10',src_mac='12:11:11:11:11:11')",
-                    "'\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00'"
+                    "str(\"\\x00\" * (60 - 42))"
                 ]
             }
         ]
@@ -329,12 +329,12 @@
                     "itag(sid=100)",
                     "ethernet(dst='22:22:22:22:22:22', src='12:11:11:11:11:11', ethertype=2054)",
                     "arp(dst_ip='192.168.20.20',dst_mac='22:22:22:22:22:22', opcode=1, src_ip='192.168.10.10',src_mac='12:11:11:11:11:11')",
-                    "'\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00'"
+                    "str(\"\\x00\" * (60 - 42))"
                 ],
                 "egress":[
                     "ethernet(dst='22:22:22:22:22:22', src='12:11:11:11:11:11', ethertype=2054)",
                     "arp(dst_ip='192.168.20.20',dst_mac='22:22:22:22:22:22', opcode=1, src_ip='10.10.10.10',src_mac='12:11:11:11:11:11')",
-                    "'\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00'"
+                    "str(\"\\x00\" * (60 - 42))"
                 ]
             }
         ]
diff --git a/ryu/tests/switch/of13/action/25_SET_FIELD/23_ARP_TPA.json b/ryu/tests/switch/of13/action/25_SET_FIELD/23_ARP_TPA.json
index 02133d0c..91f0dadf 100644
--- a/ryu/tests/switch/of13/action/25_SET_FIELD/23_ARP_TPA.json
+++ b/ryu/tests/switch/of13/action/25_SET_FIELD/23_ARP_TPA.json
@@ -56,12 +56,12 @@
                 "ingress":[
                     "ethernet(dst='22:22:22:22:22:22', src='12:11:11:11:11:11', ethertype=2054)",
                     "arp(dst_ip='192.168.20.20',dst_mac='22:22:22:22:22:22', opcode=1, src_ip='192.168.10.10',src_mac='12:11:11:11:11:11')",
-                    "'\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00'"
+                    "str(\"\\x00\" * (60 - 42))"
                 ],
                 "egress":[
                     "ethernet(dst='22:22:22:22:22:22', src='12:11:11:11:11:11', ethertype=2054)",
                     "arp(dst_ip='10.10.20.20',dst_mac='22:22:22:22:22:22', opcode=1, src_ip='192.168.10.10',src_mac='12:11:11:11:11:11')",
-                    "'\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00'"
+                    "str(\"\\x00\" * (60 - 42))"
                 ]
             }
         ]
@@ -227,12 +227,12 @@
                     "ethernet(dst='22:22:22:22:22:22', src='12:11:11:11:11:11', ethertype=34887)",
                     "mpls(bsb=1, label=100, exp=3, ttl=64)",
                     "arp(dst_ip='192.168.20.20',dst_mac='22:22:22:22:22:22', opcode=1, src_ip='192.168.10.10',src_mac='12:11:11:11:11:11')",
-                    "'\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00'"
+                    "str(\"\\x00\" * (60 - 42))"
                 ],
                 "egress":[
                     "ethernet(dst='22:22:22:22:22:22', src='12:11:11:11:11:11', ethertype=2054)",
                     "arp(dst_ip='10.10.20.20',dst_mac='22:22:22:22:22:22', opcode=1, src_ip='192.168.10.10',src_mac='12:11:11:11:11:11')",
-                    "'\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00'"
+                    "str(\"\\x00\" * (60 - 42))"
                 ]
             }
         ]
@@ -329,12 +329,12 @@
                     "itag(sid=100)",
                     "ethernet(dst='22:22:22:22:22:22', src='12:11:11:11:11:11', ethertype=2054)",
                     "arp(dst_ip='192.168.20.20',dst_mac='22:22:22:22:22:22', opcode=1, src_ip='192.168.10.10',src_mac='12:11:11:11:11:11')",
-                    "'\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00'"
+                    "str(\"\\x00\" * (60 - 42))"
                 ],
                 "egress":[
                     "ethernet(dst='22:22:22:22:22:22', src='12:11:11:11:11:11', ethertype=2054)",
                     "arp(dst_ip='10.10.20.20',dst_mac='22:22:22:22:22:22', opcode=1, src_ip='192.168.10.10',src_mac='12:11:11:11:11:11')",
-                    "'\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00'"
+                    "str(\"\\x00\" * (60 - 42))"
                 ]
             }
         ]
diff --git a/ryu/tests/switch/of13/action/25_SET_FIELD/24_ARP_SHA.json b/ryu/tests/switch/of13/action/25_SET_FIELD/24_ARP_SHA.json
index 7f5823df..056ad34d 100644
--- a/ryu/tests/switch/of13/action/25_SET_FIELD/24_ARP_SHA.json
+++ b/ryu/tests/switch/of13/action/25_SET_FIELD/24_ARP_SHA.json
@@ -56,12 +56,12 @@
                 "ingress":[
                     "ethernet(dst='22:22:22:22:22:22', src='12:11:11:11:11:11', ethertype=2054)",
                     "arp(dst_ip='192.168.20.20',dst_mac='22:22:22:22:22:22', opcode=1, src_ip='192.168.10.10',src_mac='12:11:11:11:11:11')",
-                    "'\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00'"
+                    "str(\"\\x00\" * (60 - 42))"
                 ],
                 "egress":[
                     "ethernet(dst='22:22:22:22:22:22', src='12:11:11:11:11:11', ethertype=2054)",
                     "arp(dst_ip='192.168.20.20',dst_mac='22:22:22:22:22:22', opcode=1, src_ip='192.168.10.10',src_mac='aa:aa:aa:aa:aa:aa')",
-                    "'\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00'"
+                    "str(\"\\x00\" * (60 - 42))"
                 ]
             }
         ]
@@ -227,12 +227,12 @@
                     "ethernet(dst='22:22:22:22:22:22', src='12:11:11:11:11:11', ethertype=34887)",
                     "mpls(bsb=1, label=100, exp=3, ttl=64)",
                     "arp(dst_ip='192.168.20.20',dst_mac='22:22:22:22:22:22', opcode=1, src_ip='192.168.10.10',src_mac='12:11:11:11:11:11')",
-                    "'\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00'"
+                    "str(\"\\x00\" * (60 - 42))"
                 ],
                 "egress":[
                     "ethernet(dst='22:22:22:22:22:22', src='12:11:11:11:11:11', ethertype=2054)",
                     "arp(dst_ip='192.168.20.20',dst_mac='22:22:22:22:22:22', opcode=1, src_ip='192.168.10.10',src_mac='aa:aa:aa:aa:aa:aa')",
-                    "'\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00'"
+                    "str(\"\\x00\" * (60 - 42))"
                 ]
             }
         ]
@@ -329,12 +329,12 @@
                     "itag(sid=100)",
                     "ethernet(dst='22:22:22:22:22:22', src='12:11:11:11:11:11', ethertype=2054)",
                     "arp(dst_ip='192.168.20.20',dst_mac='22:22:22:22:22:22', opcode=1, src_ip='192.168.10.10',src_mac='12:11:11:11:11:11')",
-                    "'\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00'"
+                    "str(\"\\x00\" * (60 - 42))"
                 ],
                 "egress":[
                     "ethernet(dst='22:22:22:22:22:22', src='12:11:11:11:11:11', ethertype=2054)",
                     "arp(dst_ip='192.168.20.20',dst_mac='22:22:22:22:22:22', opcode=1, src_ip='192.168.10.10',src_mac='aa:aa:aa:aa:aa:aa')",
-                    "'\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00'"
+                    "str(\"\\x00\" * (60 - 42))"
                 ]
             }
         ]
diff --git a/ryu/tests/switch/of13/action/25_SET_FIELD/25_ARP_THA.json b/ryu/tests/switch/of13/action/25_SET_FIELD/25_ARP_THA.json
index f15d1a90..d2cae428 100644
--- a/ryu/tests/switch/of13/action/25_SET_FIELD/25_ARP_THA.json
+++ b/ryu/tests/switch/of13/action/25_SET_FIELD/25_ARP_THA.json
@@ -56,12 +56,12 @@
                 "ingress":[
                     "ethernet(dst='22:22:22:22:22:22', src='12:11:11:11:11:11', ethertype=2054)",
                     "arp(dst_ip='192.168.20.20',dst_mac='22:22:22:22:22:22', opcode=1, src_ip='192.168.10.10',src_mac='12:11:11:11:11:11')",
-                    "'\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00'"
+                    "str(\"\\x00\" * (60 - 42))"
                 ],
                 "egress":[
                     "ethernet(dst='22:22:22:22:22:22', src='12:11:11:11:11:11', ethertype=2054)",
                     "arp(dst_ip='192.168.20.20',dst_mac='ba:bb:bb:bb:bb:bb', opcode=1, src_ip='192.168.10.10',src_mac='12:11:11:11:11:11')",
-                    "'\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00'"
+                    "str(\"\\x00\" * (60 - 42))"
                 ]
             }
         ]
@@ -227,12 +227,12 @@
                     "ethernet(dst='22:22:22:22:22:22', src='12:11:11:11:11:11', ethertype=34887)",
                     "mpls(bsb=1, label=100, exp=3, ttl=64)",
                     "arp(dst_ip='192.168.20.20',dst_mac='22:22:22:22:22:22', opcode=1, src_ip='192.168.10.10',src_mac='12:11:11:11:11:11')",
-                    "'\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00'"
+                    "str(\"\\x00\" * (60 - 42))"
                 ],
                 "egress":[
                     "ethernet(dst='22:22:22:22:22:22', src='12:11:11:11:11:11', ethertype=2054)",
                     "arp(dst_ip='192.168.20.20',dst_mac='ba:bb:bb:bb:bb:bb', opcode=1, src_ip='192.168.10.10',src_mac='12:11:11:11:11:11')",
-                    "'\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00'"
+                    "str(\"\\x00\" * (60 - 42))"
                 ]
             }
         ]
@@ -329,12 +329,12 @@
                     "itag(sid=100)",
                     "ethernet(dst='22:22:22:22:22:22', src='12:11:11:11:11:11', ethertype=2054)",
                     "arp(dst_ip='192.168.20.20',dst_mac='22:22:22:22:22:22', opcode=1, src_ip='192.168.10.10',src_mac='12:11:11:11:11:11')",
-                    "'\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00'"
+                    "str(\"\\x00\" * (60 - 42))"
                 ],
                 "egress":[
                     "ethernet(dst='22:22:22:22:22:22', src='12:11:11:11:11:11', ethertype=2054)",
                     "arp(dst_ip='192.168.20.20',dst_mac='ba:bb:bb:bb:bb:bb', opcode=1, src_ip='192.168.10.10',src_mac='12:11:11:11:11:11')",
-                    "'\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00'"
+                    "str(\"\\x00\" * (60 - 42))"
                 ]
             }
         ]
diff --git a/ryu/tests/switch/of13/action/25_SET_FIELD/38_TUNNEL_ID.json b/ryu/tests/switch/of13/action/25_SET_FIELD/38_TUNNEL_ID.json
index d2559277..64e5fcbb 100644
--- a/ryu/tests/switch/of13/action/25_SET_FIELD/38_TUNNEL_ID.json
+++ b/ryu/tests/switch/of13/action/25_SET_FIELD/38_TUNNEL_ID.json
@@ -267,12 +267,12 @@
                 "ingress":[
                     "ethernet(dst='22:22:22:22:22:22', src='12:11:11:11:11:11', ethertype=2054)",
                     "arp(dst_ip='192.168.20.20',dst_mac='22:22:22:22:22:22', opcode=1, src_ip='192.168.10.10',src_mac='12:11:11:11:11:11')",
-                    "'\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00'"
+                    "str(\"\\x00\" * (60 - 42))"
                 ],
                 "egress":[
                     "ethernet(dst='22:22:22:22:22:22', src='12:11:11:11:11:11', ethertype=2054)",
                     "arp(dst_ip='192.168.20.20',dst_mac='22:22:22:22:22:22', opcode=1, src_ip='192.168.10.10',src_mac='12:11:11:11:11:11')",
-                    "'\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00'"
+                    "str(\"\\x00\" * (60 - 42))"
                 ]
             }
         ]
diff --git a/ryu/tests/switch/of13/action/26_PUSH_PBB.json b/ryu/tests/switch/of13/action/26_PUSH_PBB.json
index 9fa0e594..f98ab1b4 100644
--- a/ryu/tests/switch/of13/action/26_PUSH_PBB.json
+++ b/ryu/tests/switch/of13/action/26_PUSH_PBB.json
@@ -163,14 +163,14 @@
                 "ingress":[
                     "ethernet(dst='22:22:22:22:22:22', src='12:11:11:11:11:11', ethertype=2054)",
                     "arp(dst_ip='192.168.20.20',dst_mac='22:22:22:22:22:22', opcode=1, src_ip='192.168.10.10',src_mac='12:11:11:11:11:11')",
-                    "'\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00'"
+                    "str(\"\\x00\" * (60 - 42))"
                 ],
                 "egress":[
                     "ethernet(dst='22:22:22:22:22:22', src='12:11:11:11:11:11', ethertype=35047)",
                     "itag()",
                     "ethernet(dst='22:22:22:22:22:22', src='12:11:11:11:11:11', ethertype=2054)",
                     "arp(dst_ip='192.168.20.20',dst_mac='22:22:22:22:22:22', opcode=1, src_ip='192.168.10.10',src_mac='12:11:11:11:11:11')",
-                    "'\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00'"
+                    "str(\"\\x00\" * (60 - 42))"
                 ]
             }
         ]
diff --git a/ryu/tests/switch/of13/match/00_IN_PORT.json b/ryu/tests/switch/of13/match/00_IN_PORT.json
index 9eef9ffe..8c277c1f 100644
--- a/ryu/tests/switch/of13/match/00_IN_PORT.json
+++ b/ryu/tests/switch/of13/match/00_IN_PORT.json
@@ -348,12 +348,12 @@
                 "ingress":[
                     "ethernet(dst='22:22:22:22:22:22', src='12:11:11:11:11:11', ethertype=2054)",
                     "arp(dst_ip='192.168.20.20',dst_mac='22:22:22:22:22:22', opcode=1, src_ip='192.168.10.10',src_mac='12:11:11:11:11:11')",
-                    "'\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00'"
+                    "str(\"\\x00\" * (60 - 42))"
                 ],
                 "egress":[
                     "ethernet(dst='22:22:22:22:22:22', src='12:11:11:11:11:11', ethertype=2054)",
                     "arp(dst_ip='192.168.20.20',dst_mac='22:22:22:22:22:22', opcode=1, src_ip='192.168.10.10',src_mac='12:11:11:11:11:11')",
-                    "'\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00'"
+                    "str(\"\\x00\" * (60 - 42))"
                 ]
             }
         ]
@@ -399,12 +399,12 @@
                 "ingress":[
                     "ethernet(dst='22:22:22:22:22:22', src='12:11:11:11:11:11', ethertype=2054)",
                     "arp(dst_ip='192.168.20.20',dst_mac='22:22:22:22:22:22', opcode=1, src_ip='192.168.10.10',src_mac='12:11:11:11:11:11')",
-                    "'\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00'"
+                    "str(\"\\x00\" * (60 - 42))"
                 ],
                 "PACKET_IN":[
                     "ethernet(dst='22:22:22:22:22:22', src='12:11:11:11:11:11', ethertype=2054)",
                     "arp(dst_ip='192.168.20.20',dst_mac='22:22:22:22:22:22', opcode=1, src_ip='192.168.10.10',src_mac='12:11:11:11:11:11')",
-                    "'\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00'"
+                    "str(\"\\x00\" * (60 - 42))"
                 ]
             }
         ]
@@ -449,7 +449,7 @@
                 "ingress":[
                     "ethernet(dst='ba:bb:bb:bb:bb:bb', src='aa:aa:aa:aa:aa:aa', ethertype=2054)",
                     "arp(dst_ip='10.10.20.20',dst_mac='ba:bb:bb:bb:bb:bb', opcode=2, src_ip='10.10.10.10',src_mac='aa:aa:aa:aa:aa:aa')",
-                    "'\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00'"
+                    "str(\"\\x00\" * (60 - 42))"
                 ],
                 "table-miss":[
                     0
diff --git a/ryu/tests/switch/of13/match/02_METADATA.json b/ryu/tests/switch/of13/match/02_METADATA.json
index 30ce0763..766b9513 100644
--- a/ryu/tests/switch/of13/match/02_METADATA.json
+++ b/ryu/tests/switch/of13/match/02_METADATA.json
@@ -509,12 +509,12 @@
                 "ingress":[
                     "ethernet(dst='22:22:22:22:22:22', src='12:11:11:11:11:11', ethertype=2054)",
                     "arp(dst_ip='192.168.20.20',dst_mac='22:22:22:22:22:22', opcode=1, src_ip='192.168.10.10',src_mac='12:11:11:11:11:11')",
-                    "'\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00'"
+                    "str(\"\\x00\" * (60 - 42))"
                 ],
                 "egress":[
                     "ethernet(dst='22:22:22:22:22:22', src='12:11:11:11:11:11', ethertype=2054)",
                     "arp(dst_ip='192.168.20.20',dst_mac='22:22:22:22:22:22', opcode=1, src_ip='192.168.10.10',src_mac='12:11:11:11:11:11')",
-                    "'\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00'"
+                    "str(\"\\x00\" * (60 - 42))"
                 ]
             }
         ]
@@ -583,12 +583,12 @@
                 "ingress":[
                     "ethernet(dst='22:22:22:22:22:22', src='12:11:11:11:11:11', ethertype=2054)",
                     "arp(dst_ip='192.168.20.20',dst_mac='22:22:22:22:22:22', opcode=1, src_ip='192.168.10.10',src_mac='12:11:11:11:11:11')",
-                    "'\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00'"
+                    "str(\"\\x00\" * (60 - 42))"
                 ],
                 "PACKET_IN":[
                     "ethernet(dst='22:22:22:22:22:22', src='12:11:11:11:11:11', ethertype=2054)",
                     "arp(dst_ip='192.168.20.20',dst_mac='22:22:22:22:22:22', opcode=1, src_ip='192.168.10.10',src_mac='12:11:11:11:11:11')",
-                    "'\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00'"
+                    "str(\"\\x00\" * (60 - 42))"
                 ]
             }
         ]
@@ -656,7 +656,7 @@
                 "ingress":[
                     "ethernet(dst='ba:bb:bb:bb:bb:bb', src='aa:aa:aa:aa:aa:aa', ethertype=2054)",
                     "arp(dst_ip='10.10.20.20',dst_mac='ba:bb:bb:bb:bb:bb', opcode=2, src_ip='10.10.10.10',src_mac='aa:aa:aa:aa:aa:aa')",
-                    "'\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00'"
+                    "str(\"\\x00\" * (60 - 42))"
                 ],
                 "table-miss":[
                     1
diff --git a/ryu/tests/switch/of13/match/02_METADATA_Mask.json b/ryu/tests/switch/of13/match/02_METADATA_Mask.json
index 274bc308..3f6fedeb 100644
--- a/ryu/tests/switch/of13/match/02_METADATA_Mask.json
+++ b/ryu/tests/switch/of13/match/02_METADATA_Mask.json
@@ -516,12 +516,12 @@
                 "ingress":[
                     "ethernet(dst='22:22:22:22:22:22', src='12:11:11:11:11:11', ethertype=2054)",
                     "arp(dst_ip='192.168.20.20',dst_mac='22:22:22:22:22:22', opcode=1, src_ip='192.168.10.10',src_mac='12:11:11:11:11:11')",
-                    "'\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00'"
+                    "str(\"\\x00\" * (60 - 42))"
                 ],
                 "egress":[
                     "ethernet(dst='22:22:22:22:22:22', src='12:11:11:11:11:11', ethertype=2054)",
                     "arp(dst_ip='192.168.20.20',dst_mac='22:22:22:22:22:22', opcode=1, src_ip='192.168.10.10',src_mac='12:11:11:11:11:11')",
-                    "'\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00'"
+                    "str(\"\\x00\" * (60 - 42))"
                 ]
             }
         ]
@@ -591,12 +591,12 @@
                 "ingress":[
                     "ethernet(dst='22:22:22:22:22:22', src='12:11:11:11:11:11', ethertype=2054)",
                     "arp(dst_ip='192.168.20.20',dst_mac='22:22:22:22:22:22', opcode=1, src_ip='192.168.10.10',src_mac='12:11:11:11:11:11')",
-                    "'\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00'"
+                    "str(\"\\x00\" * (60 - 42))"
                 ],
                 "PACKET_IN":[
                     "ethernet(dst='22:22:22:22:22:22', src='12:11:11:11:11:11', ethertype=2054)",
                     "arp(dst_ip='192.168.20.20',dst_mac='22:22:22:22:22:22', opcode=1, src_ip='192.168.10.10',src_mac='12:11:11:11:11:11')",
-                    "'\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00'"
+                    "str(\"\\x00\" * (60 - 42))"
                 ]
             }
         ]
@@ -665,7 +665,7 @@
                 "ingress":[
                     "ethernet(dst='ba:bb:bb:bb:bb:bb', src='aa:aa:aa:aa:aa:aa', ethertype=2054)",
                     "arp(dst_ip='10.10.20.20',dst_mac='ba:bb:bb:bb:bb:bb', opcode=2, src_ip='10.10.10.10',src_mac='aa:aa:aa:aa:aa:aa')",
-                    "'\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00'"
+                    "str(\"\\x00\" * (60 - 42))"
                 ],
                 "table-miss":[
                     1
diff --git a/ryu/tests/switch/of13/match/03_ETH_DST.json b/ryu/tests/switch/of13/match/03_ETH_DST.json
index 84476157..6e898186 100644
--- a/ryu/tests/switch/of13/match/03_ETH_DST.json
+++ b/ryu/tests/switch/of13/match/03_ETH_DST.json
@@ -348,12 +348,12 @@
                 "ingress":[
                     "ethernet(dst='22:22:22:22:22:22', src='12:11:11:11:11:11', ethertype=2054)",
                     "arp(dst_ip='192.168.20.20',dst_mac='22:22:22:22:22:22', opcode=1, src_ip='192.168.10.10',src_mac='12:11:11:11:11:11')",
-                    "'\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00'"
+                    "str(\"\\x00\" * (60 - 42))"
                 ],
                 "egress":[
                     "ethernet(dst='22:22:22:22:22:22', src='12:11:11:11:11:11', ethertype=2054)",
                     "arp(dst_ip='192.168.20.20',dst_mac='22:22:22:22:22:22', opcode=1, src_ip='192.168.10.10',src_mac='12:11:11:11:11:11')",
-                    "'\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00'"
+                    "str(\"\\x00\" * (60 - 42))"
                 ]
             }
         ]
@@ -399,12 +399,12 @@
                 "ingress":[
                     "ethernet(dst='22:22:22:22:22:22', src='12:11:11:11:11:11', ethertype=2054)",
                     "arp(dst_ip='192.168.20.20',dst_mac='22:22:22:22:22:22', opcode=1, src_ip='192.168.10.10',src_mac='12:11:11:11:11:11')",
-                    "'\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00'"
+                    "str(\"\\x00\" * (60 - 42))"
                 ],
                 "PACKET_IN":[
                     "ethernet(dst='22:22:22:22:22:22', src='12:11:11:11:11:11', ethertype=2054)",
                     "arp(dst_ip='192.168.20.20',dst_mac='22:22:22:22:22:22', opcode=1, src_ip='192.168.10.10',src_mac='12:11:11:11:11:11')",
-                    "'\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00'"
+                    "str(\"\\x00\" * (60 - 42))"
                 ]
             }
         ]
@@ -449,7 +449,7 @@
                 "ingress":[
                     "ethernet(dst='ba:bb:bb:bb:bb:bb', src='aa:aa:aa:aa:aa:aa', ethertype=2054)",
                     "arp(dst_ip='10.10.20.20',dst_mac='ba:bb:bb:bb:bb:bb', opcode=2, src_ip='10.10.10.10',src_mac='aa:aa:aa:aa:aa:aa')",
-                    "'\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00'"
+                    "str(\"\\x00\" * (60 - 42))"
                 ],
                 "table-miss":[
                     0
diff --git a/ryu/tests/switch/of13/match/03_ETH_DST_Mask.json b/ryu/tests/switch/of13/match/03_ETH_DST_Mask.json
index d1957720..60f3d93f 100644
--- a/ryu/tests/switch/of13/match/03_ETH_DST_Mask.json
+++ b/ryu/tests/switch/of13/match/03_ETH_DST_Mask.json
@@ -355,12 +355,12 @@
                 "ingress":[
                     "ethernet(dst='22:22:22:22:22:22', src='12:11:11:11:11:11', ethertype=2054)",
                     "arp(dst_ip='192.168.20.20',dst_mac='22:22:22:22:22:22', opcode=1, src_ip='192.168.10.10',src_mac='12:11:11:11:11:11')",
-                    "'\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00'"
+                    "str(\"\\x00\" * (60 - 42))"
                 ],
                 "egress":[
                     "ethernet(dst='22:22:22:22:22:22', src='12:11:11:11:11:11', ethertype=2054)",
                     "arp(dst_ip='192.168.20.20',dst_mac='22:22:22:22:22:22', opcode=1, src_ip='192.168.10.10',src_mac='12:11:11:11:11:11')",
-                    "'\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00'"
+                    "str(\"\\x00\" * (60 - 42))"
                 ]
             }
         ]
@@ -407,12 +407,12 @@
                 "ingress":[
                     "ethernet(dst='22:22:22:22:22:22', src='12:11:11:11:11:11', ethertype=2054)",
                     "arp(dst_ip='192.168.20.20',dst_mac='22:22:22:22:22:22', opcode=1, src_ip='192.168.10.10',src_mac='12:11:11:11:11:11')",
-                    "'\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00'"
+                    "str(\"\\x00\" * (60 - 42))"
                 ],
                 "PACKET_IN":[
                     "ethernet(dst='22:22:22:22:22:22', src='12:11:11:11:11:11', ethertype=2054)",
                     "arp(dst_ip='192.168.20.20',dst_mac='22:22:22:22:22:22', opcode=1, src_ip='192.168.10.10',src_mac='12:11:11:11:11:11')",
-                    "'\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00'"
+                    "str(\"\\x00\" * (60 - 42))"
                 ]
             }
         ]
@@ -458,7 +458,7 @@
                 "ingress":[
                     "ethernet(dst='ba:bb:bb:bb:bb:bb', src='aa:aa:aa:aa:aa:aa', ethertype=2054)",
                     "arp(dst_ip='10.10.20.20',dst_mac='ba:bb:bb:bb:bb:bb', opcode=2, src_ip='10.10.10.10',src_mac='aa:aa:aa:aa:aa:aa')",
-                    "'\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00'"
+                    "str(\"\\x00\" * (60 - 42))"
                 ],
                 "table-miss":[
                     0
diff --git a/ryu/tests/switch/of13/match/04_ETH_SRC.json b/ryu/tests/switch/of13/match/04_ETH_SRC.json
index cf128ca0..7cfda44e 100644
--- a/ryu/tests/switch/of13/match/04_ETH_SRC.json
+++ b/ryu/tests/switch/of13/match/04_ETH_SRC.json
@@ -348,12 +348,12 @@
                 "ingress":[
                     "ethernet(dst='22:22:22:22:22:22', src='12:11:11:11:11:11', ethertype=2054)",
                     "arp(dst_ip='192.168.20.20',dst_mac='22:22:22:22:22:22', opcode=1, src_ip='192.168.10.10',src_mac='12:11:11:11:11:11')",
-                    "'\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00'"
+                    "str(\"\\x00\" * (60 - 42))"
                 ],
                 "egress":[
                     "ethernet(dst='22:22:22:22:22:22', src='12:11:11:11:11:11', ethertype=2054)",
                     "arp(dst_ip='192.168.20.20',dst_mac='22:22:22:22:22:22', opcode=1, src_ip='192.168.10.10',src_mac='12:11:11:11:11:11')",
-                    "'\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00'"
+                    "str(\"\\x00\" * (60 - 42))"
                 ]
             }
         ]
@@ -399,12 +399,12 @@
                 "ingress":[
                     "ethernet(dst='22:22:22:22:22:22', src='12:11:11:11:11:11', ethertype=2054)",
                     "arp(dst_ip='192.168.20.20',dst_mac='22:22:22:22:22:22', opcode=1, src_ip='192.168.10.10',src_mac='12:11:11:11:11:11')",
-                    "'\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00'"
+                    "str(\"\\x00\" * (60 - 42))"
                 ],
                 "PACKET_IN":[
                     "ethernet(dst='22:22:22:22:22:22', src='12:11:11:11:11:11', ethertype=2054)",
                     "arp(dst_ip='192.168.20.20',dst_mac='22:22:22:22:22:22', opcode=1, src_ip='192.168.10.10',src_mac='12:11:11:11:11:11')",
-                    "'\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00'"
+                    "str(\"\\x00\" * (60 - 42))"
                 ]
             }
         ]
@@ -449,7 +449,7 @@
                 "ingress":[
                     "ethernet(dst='ba:bb:bb:bb:bb:bb', src='aa:aa:aa:aa:aa:aa', ethertype=2054)",
                     "arp(dst_ip='10.10.20.20',dst_mac='ba:bb:bb:bb:bb:bb', opcode=2, src_ip='10.10.10.10',src_mac='aa:aa:aa:aa:aa:aa')",
-                    "'\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00'"
+                    "str(\"\\x00\" * (60 - 42))"
                 ],
                 "table-miss":[
                     0
diff --git a/ryu/tests/switch/of13/match/04_ETH_SRC_Mask.json b/ryu/tests/switch/of13/match/04_ETH_SRC_Mask.json
index dad2f1a3..d6e4847c 100644
--- a/ryu/tests/switch/of13/match/04_ETH_SRC_Mask.json
+++ b/ryu/tests/switch/of13/match/04_ETH_SRC_Mask.json
@@ -355,12 +355,12 @@
                 "ingress":[
                     "ethernet(dst='22:22:22:22:22:22', src='12:11:11:11:11:11', ethertype=2054)",
                     "arp(dst_ip='192.168.20.20',dst_mac='22:22:22:22:22:22', opcode=1, src_ip='192.168.10.10',src_mac='12:11:11:11:11:11')",
-                    "'\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00'"
+                    "str(\"\\x00\" * (60 - 42))"
                 ],
                 "egress":[
                     "ethernet(dst='22:22:22:22:22:22', src='12:11:11:11:11:11', ethertype=2054)",
                     "arp(dst_ip='192.168.20.20',dst_mac='22:22:22:22:22:22', opcode=1, src_ip='192.168.10.10',src_mac='12:11:11:11:11:11')",
-                    "'\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00'"
+                    "str(\"\\x00\" * (60 - 42))"
                 ]
             }
         ]
@@ -407,12 +407,12 @@
                 "ingress":[
                     "ethernet(dst='22:22:22:22:22:22', src='12:11:11:11:11:11', ethertype=2054)",
                     "arp(dst_ip='192.168.20.20',dst_mac='22:22:22:22:22:22', opcode=1, src_ip='192.168.10.10',src_mac='12:11:11:11:11:11')",
-                    "'\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00'"
+                    "str(\"\\x00\" * (60 - 42))"
                 ],
                 "PACKET_IN":[
                     "ethernet(dst='22:22:22:22:22:22', src='12:11:11:11:11:11', ethertype=2054)",
                     "arp(dst_ip='192.168.20.20',dst_mac='22:22:22:22:22:22', opcode=1, src_ip='192.168.10.10',src_mac='12:11:11:11:11:11')",
-                    "'\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00'"
+                    "str(\"\\x00\" * (60 - 42))"
                 ]
             }
         ]
@@ -458,7 +458,7 @@
                 "ingress":[
                     "ethernet(dst='ba:bb:bb:bb:bb:bb', src='aa:aa:aa:aa:aa:aa', ethertype=2054)",
                     "arp(dst_ip='10.10.20.20',dst_mac='ba:bb:bb:bb:bb:bb', opcode=2, src_ip='10.10.10.10',src_mac='aa:aa:aa:aa:aa:aa')",
-                    "'\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00'"
+                    "str(\"\\x00\" * (60 - 42))"
                 ],
                 "table-miss":[
                     0
diff --git a/ryu/tests/switch/of13/match/05_ETH_TYPE.json b/ryu/tests/switch/of13/match/05_ETH_TYPE.json
index 8aa89ab0..9013b143 100644
--- a/ryu/tests/switch/of13/match/05_ETH_TYPE.json
+++ b/ryu/tests/switch/of13/match/05_ETH_TYPE.json
@@ -348,12 +348,12 @@
                 "ingress":[
                     "ethernet(dst='22:22:22:22:22:22', src='12:11:11:11:11:11', ethertype=2054)",
                     "arp(dst_ip='192.168.20.20',dst_mac='22:22:22:22:22:22', opcode=1, src_ip='192.168.10.10',src_mac='12:11:11:11:11:11')",
-                    "'\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00'"
+                    "str(\"\\x00\" * (60 - 42))"
                 ],
                 "egress":[
                     "ethernet(dst='22:22:22:22:22:22', src='12:11:11:11:11:11', ethertype=2054)",
                     "arp(dst_ip='192.168.20.20',dst_mac='22:22:22:22:22:22', opcode=1, src_ip='192.168.10.10',src_mac='12:11:11:11:11:11')",
-                    "'\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00'"
+                    "str(\"\\x00\" * (60 - 42))"
                 ]
             }
         ]
@@ -399,12 +399,12 @@
                 "ingress":[
                     "ethernet(dst='22:22:22:22:22:22', src='12:11:11:11:11:11', ethertype=2054)",
                     "arp(dst_ip='192.168.20.20',dst_mac='22:22:22:22:22:22', opcode=1, src_ip='192.168.10.10',src_mac='12:11:11:11:11:11')",
-                    "'\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00'"
+                    "str(\"\\x00\" * (60 - 42))"
                 ],
                 "PACKET_IN":[
                     "ethernet(dst='22:22:22:22:22:22', src='12:11:11:11:11:11', ethertype=2054)",
                     "arp(dst_ip='192.168.20.20',dst_mac='22:22:22:22:22:22', opcode=1, src_ip='192.168.10.10',src_mac='12:11:11:11:11:11')",
-                    "'\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00'"
+                    "str(\"\\x00\" * (60 - 42))"
                 ]
             }
         ]
@@ -449,7 +449,7 @@
                 "ingress":[
                     "ethernet(dst='ba:bb:bb:bb:bb:bb', src='aa:aa:aa:aa:aa:aa', ethertype=2054)",
                     "arp(dst_ip='10.10.20.20',dst_mac='ba:bb:bb:bb:bb:bb', opcode=2, src_ip='10.10.10.10',src_mac='aa:aa:aa:aa:aa:aa')",
-                    "'\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00'"
+                    "str(\"\\x00\" * (60 - 42))"
                 ],
                 "table-miss":[
                     0
diff --git a/ryu/tests/switch/of13/match/21_ARP_OP.json b/ryu/tests/switch/of13/match/21_ARP_OP.json
index 61598718..3e47a59e 100644
--- a/ryu/tests/switch/of13/match/21_ARP_OP.json
+++ b/ryu/tests/switch/of13/match/21_ARP_OP.json
@@ -46,12 +46,12 @@
                 "ingress":[
                     "ethernet(dst='22:22:22:22:22:22', src='12:11:11:11:11:11', ethertype=2054)",
                     "arp(dst_ip='192.168.20.20',dst_mac='22:22:22:22:22:22', opcode=1, src_ip='192.168.10.10',src_mac='12:11:11:11:11:11')",
-                    "'\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00'"
+                    "str(\"\\x00\" * (60 - 42))"
                 ],
                 "egress":[
                     "ethernet(dst='22:22:22:22:22:22', src='12:11:11:11:11:11', ethertype=2054)",
                     "arp(dst_ip='192.168.20.20',dst_mac='22:22:22:22:22:22', opcode=1, src_ip='192.168.10.10',src_mac='12:11:11:11:11:11')",
-                    "'\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00'"
+                    "str(\"\\x00\" * (60 - 42))"
                 ]
             }
         ]
@@ -103,12 +103,12 @@
                 "ingress":[
                     "ethernet(dst='22:22:22:22:22:22', src='12:11:11:11:11:11', ethertype=2054)",
                     "arp(dst_ip='192.168.20.20',dst_mac='22:22:22:22:22:22', opcode=1, src_ip='192.168.10.10',src_mac='12:11:11:11:11:11')",
-                    "'\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00'"
+                    "str(\"\\x00\" * (60 - 42))"
                 ],
                 "PACKET_IN":[
                     "ethernet(dst='22:22:22:22:22:22', src='12:11:11:11:11:11', ethertype=2054)",
                     "arp(dst_ip='192.168.20.20',dst_mac='22:22:22:22:22:22', opcode=1, src_ip='192.168.10.10',src_mac='12:11:11:11:11:11')",
-                    "'\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00'"
+                    "str(\"\\x00\" * (60 - 42))"
                 ]
             }
         ]
@@ -159,7 +159,7 @@
                 "ingress":[
                     "ethernet(dst='ba:bb:bb:bb:bb:bb', src='aa:aa:aa:aa:aa:aa', ethertype=2054)",
                     "arp(dst_ip='10.10.20.20',dst_mac='ba:bb:bb:bb:bb:bb', opcode=2, src_ip='10.10.10.10',src_mac='aa:aa:aa:aa:aa:aa')",
-                    "'\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00'"
+                    "str(\"\\x00\" * (60 - 42))"
                 ],
                 "table-miss":[
                     0
@@ -422,12 +422,12 @@
                     "ethernet(dst='22:22:22:22:22:22', src='12:11:11:11:11:11', ethertype=34887)",
                     "mpls(bsb=1, label=100, exp=3, ttl=64)",
                     "arp(dst_ip='192.168.20.20',dst_mac='22:22:22:22:22:22', opcode=1, src_ip='192.168.10.10',src_mac='12:11:11:11:11:11')",
-                    "'\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00'"
+                    "str(\"\\x00\" * (60 - 42))"
                 ],
                 "egress":[
                     "ethernet(dst='22:22:22:22:22:22', src='12:11:11:11:11:11', ethertype=2054)",
                     "arp(dst_ip='192.168.20.20',dst_mac='22:22:22:22:22:22', opcode=1, src_ip='192.168.10.10',src_mac='12:11:11:11:11:11')",
-                    "'\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00'"
+                    "str(\"\\x00\" * (60 - 42))"
                 ]
             }
         ]
@@ -516,12 +516,12 @@
                     "ethernet(dst='22:22:22:22:22:22', src='12:11:11:11:11:11', ethertype=34887)",
                     "mpls(bsb=1, label=100, exp=3, ttl=64)",
                     "arp(dst_ip='192.168.20.20',dst_mac='22:22:22:22:22:22', opcode=1, src_ip='192.168.10.10',src_mac='12:11:11:11:11:11')",
-                    "'\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00'"
+                    "str(\"\\x00\" * (60 - 42))"
                 ],
                 "PACKET_IN":[
                     "ethernet(dst='22:22:22:22:22:22', src='12:11:11:11:11:11', ethertype=2054)",
                     "arp(dst_ip='192.168.20.20',dst_mac='22:22:22:22:22:22', opcode=1, src_ip='192.168.10.10',src_mac='12:11:11:11:11:11')",
-                    "'\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00'"
+                    "str(\"\\x00\" * (60 - 42))"
                 ]
             }
         ]
@@ -609,7 +609,7 @@
                     "ethernet(dst='ba:bb:bb:bb:bb:bb', src='aa:aa:aa:aa:aa:aa', ethertype=34887)",
                     "mpls(bsb=1, label=203, exp=5, ttl=127)",
                     "arp(dst_ip='10.10.20.20',dst_mac='ba:bb:bb:bb:bb:bb', opcode=2, src_ip='10.10.10.10',src_mac='aa:aa:aa:aa:aa:aa')",
-                    "'\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00'"
+                    "str(\"\\x00\" * (60 - 42))"
                 ],
                 "table-miss":[
                     1
@@ -699,12 +699,12 @@
                     "itag(sid=100)",
                     "ethernet(dst='22:22:22:22:22:22', src='12:11:11:11:11:11', ethertype=2054)",
                     "arp(dst_ip='192.168.20.20',dst_mac='22:22:22:22:22:22', opcode=1, src_ip='192.168.10.10',src_mac='12:11:11:11:11:11')",
-                    "'\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00'"
+                    "str(\"\\x00\" * (60 - 42))"
                 ],
                 "egress":[
                     "ethernet(dst='22:22:22:22:22:22', src='12:11:11:11:11:11', ethertype=2054)",
                     "arp(dst_ip='192.168.20.20',dst_mac='22:22:22:22:22:22', opcode=1, src_ip='192.168.10.10',src_mac='12:11:11:11:11:11')",
-                    "'\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00'"
+                    "str(\"\\x00\" * (60 - 42))"
                 ]
             }
         ]
@@ -792,12 +792,12 @@
                     "itag(sid=100)",
                     "ethernet(dst='22:22:22:22:22:22', src='12:11:11:11:11:11', ethertype=2054)",
                     "arp(dst_ip='192.168.20.20',dst_mac='22:22:22:22:22:22', opcode=1, src_ip='192.168.10.10',src_mac='12:11:11:11:11:11')",
-                    "'\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00'"
+                    "str(\"\\x00\" * (60 - 42))"
                 ],
                 "PACKET_IN":[
                     "ethernet(dst='22:22:22:22:22:22', src='12:11:11:11:11:11', ethertype=2054)",
                     "arp(dst_ip='192.168.20.20',dst_mac='22:22:22:22:22:22', opcode=1, src_ip='192.168.10.10',src_mac='12:11:11:11:11:11')",
-                    "'\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00'"
+                    "str(\"\\x00\" * (60 - 42))"
                 ]
             }
         ]
@@ -884,7 +884,7 @@
                     "itag(sid=203)",
                     "ethernet(dst='ba:bb:bb:bb:bb:bb', src='aa:aa:aa:aa:aa:aa', ethertype=2054)",
                     "arp(dst_ip='10.10.20.20',dst_mac='ba:bb:bb:bb:bb:bb', opcode=2, src_ip='10.10.10.10',src_mac='aa:aa:aa:aa:aa:aa')",
-                    "'\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00'"
+                    "str(\"\\x00\" * (60 - 42))"
                 ],
                 "table-miss":[
                     1
diff --git a/ryu/tests/switch/of13/match/22_ARP_SPA.json b/ryu/tests/switch/of13/match/22_ARP_SPA.json
index 5040f1cb..299df340 100644
--- a/ryu/tests/switch/of13/match/22_ARP_SPA.json
+++ b/ryu/tests/switch/of13/match/22_ARP_SPA.json
@@ -46,12 +46,12 @@
                 "ingress":[
                     "ethernet(dst='22:22:22:22:22:22', src='12:11:11:11:11:11', ethertype=2054)",
                     "arp(dst_ip='192.168.20.20',dst_mac='22:22:22:22:22:22', opcode=1, src_ip='192.168.10.10',src_mac='12:11:11:11:11:11')",
-                    "'\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00'"
+                    "str(\"\\x00\" * (60 - 42))"
                 ],
                 "egress":[
                     "ethernet(dst='22:22:22:22:22:22', src='12:11:11:11:11:11', ethertype=2054)",
                     "arp(dst_ip='192.168.20.20',dst_mac='22:22:22:22:22:22', opcode=1, src_ip='192.168.10.10',src_mac='12:11:11:11:11:11')",
-                    "'\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00'"
+                    "str(\"\\x00\" * (60 - 42))"
                 ]
             }
         ]
@@ -103,12 +103,12 @@
                 "ingress":[
                     "ethernet(dst='22:22:22:22:22:22', src='12:11:11:11:11:11', ethertype=2054)",
                     "arp(dst_ip='192.168.20.20',dst_mac='22:22:22:22:22:22', opcode=1, src_ip='192.168.10.10',src_mac='12:11:11:11:11:11')",
-                    "'\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00'"
+                    "str(\"\\x00\" * (60 - 42))"
                 ],
                 "PACKET_IN":[
                     "ethernet(dst='22:22:22:22:22:22', src='12:11:11:11:11:11', ethertype=2054)",
                     "arp(dst_ip='192.168.20.20',dst_mac='22:22:22:22:22:22', opcode=1, src_ip='192.168.10.10',src_mac='12:11:11:11:11:11')",
-                    "'\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00'"
+                    "str(\"\\x00\" * (60 - 42))"
                 ]
             }
         ]
@@ -159,7 +159,7 @@
                 "ingress":[
                     "ethernet(dst='ba:bb:bb:bb:bb:bb', src='aa:aa:aa:aa:aa:aa', ethertype=2054)",
                     "arp(dst_ip='10.10.20.20',dst_mac='ba:bb:bb:bb:bb:bb', opcode=2, src_ip='10.10.10.10',src_mac='aa:aa:aa:aa:aa:aa')",
-                    "'\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00'"
+                    "str(\"\\x00\" * (60 - 42))"
                 ],
                 "table-miss":[
                     0
@@ -422,12 +422,12 @@
                     "ethernet(dst='22:22:22:22:22:22', src='12:11:11:11:11:11', ethertype=34887)",
                     "mpls(bsb=1, label=100, exp=3, ttl=64)",
                     "arp(dst_ip='192.168.20.20',dst_mac='22:22:22:22:22:22', opcode=1, src_ip='192.168.10.10',src_mac='12:11:11:11:11:11')",
-                    "'\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00'"
+                    "str(\"\\x00\" * (60 - 42))"
                 ],
                 "egress":[
                     "ethernet(dst='22:22:22:22:22:22', src='12:11:11:11:11:11', ethertype=2054)",
                     "arp(dst_ip='192.168.20.20',dst_mac='22:22:22:22:22:22', opcode=1, src_ip='192.168.10.10',src_mac='12:11:11:11:11:11')",
-                    "'\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00'"
+                    "str(\"\\x00\" * (60 - 42))"
                 ]
             }
         ]
@@ -516,12 +516,12 @@
                     "ethernet(dst='22:22:22:22:22:22', src='12:11:11:11:11:11', ethertype=34887)",
                     "mpls(bsb=1, label=100, exp=3, ttl=64)",
                     "arp(dst_ip='192.168.20.20',dst_mac='22:22:22:22:22:22', opcode=1, src_ip='192.168.10.10',src_mac='12:11:11:11:11:11')",
-                    "'\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00'"
+                    "str(\"\\x00\" * (60 - 42))"
                 ],
                 "PACKET_IN":[
                     "ethernet(dst='22:22:22:22:22:22', src='12:11:11:11:11:11', ethertype=2054)",
                     "arp(dst_ip='192.168.20.20',dst_mac='22:22:22:22:22:22', opcode=1, src_ip='192.168.10.10',src_mac='12:11:11:11:11:11')",
-                    "'\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00'"
+                    "str(\"\\x00\" * (60 - 42))"
                 ]
             }
         ]
@@ -609,7 +609,7 @@
                     "ethernet(dst='ba:bb:bb:bb:bb:bb', src='aa:aa:aa:aa:aa:aa', ethertype=34887)",
                     "mpls(bsb=1, label=203, exp=5, ttl=127)",
                     "arp(dst_ip='10.10.20.20',dst_mac='ba:bb:bb:bb:bb:bb', opcode=2, src_ip='10.10.10.10',src_mac='aa:aa:aa:aa:aa:aa')",
-                    "'\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00'"
+                    "str(\"\\x00\" * (60 - 42))"
                 ],
                 "table-miss":[
                     1
@@ -699,12 +699,12 @@
                     "itag(sid=100)",
                     "ethernet(dst='22:22:22:22:22:22', src='12:11:11:11:11:11', ethertype=2054)",
                     "arp(dst_ip='192.168.20.20',dst_mac='22:22:22:22:22:22', opcode=1, src_ip='192.168.10.10',src_mac='12:11:11:11:11:11')",
-                    "'\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00'"
+                    "str(\"\\x00\" * (60 - 42))"
                 ],
                 "egress":[
                     "ethernet(dst='22:22:22:22:22:22', src='12:11:11:11:11:11', ethertype=2054)",
                     "arp(dst_ip='192.168.20.20',dst_mac='22:22:22:22:22:22', opcode=1, src_ip='192.168.10.10',src_mac='12:11:11:11:11:11')",
-                    "'\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00'"
+                    "str(\"\\x00\" * (60 - 42))"
                 ]
             }
         ]
@@ -792,12 +792,12 @@
                     "itag(sid=100)",
                     "ethernet(dst='22:22:22:22:22:22', src='12:11:11:11:11:11', ethertype=2054)",
                     "arp(dst_ip='192.168.20.20',dst_mac='22:22:22:22:22:22', opcode=1, src_ip='192.168.10.10',src_mac='12:11:11:11:11:11')",
-                    "'\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00'"
+                    "str(\"\\x00\" * (60 - 42))"
                 ],
                 "PACKET_IN":[
                     "ethernet(dst='22:22:22:22:22:22', src='12:11:11:11:11:11', ethertype=2054)",
                     "arp(dst_ip='192.168.20.20',dst_mac='22:22:22:22:22:22', opcode=1, src_ip='192.168.10.10',src_mac='12:11:11:11:11:11')",
-                    "'\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00'"
+                    "str(\"\\x00\" * (60 - 42))"
                 ]
             }
         ]
@@ -884,7 +884,7 @@
                     "itag(sid=203)",
                     "ethernet(dst='ba:bb:bb:bb:bb:bb', src='aa:aa:aa:aa:aa:aa', ethertype=2054)",
                     "arp(dst_ip='10.10.20.20',dst_mac='ba:bb:bb:bb:bb:bb', opcode=2, src_ip='10.10.10.10',src_mac='aa:aa:aa:aa:aa:aa')",
-                    "'\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00'"
+                    "str(\"\\x00\" * (60 - 42))"
                 ],
                 "table-miss":[
                     1
diff --git a/ryu/tests/switch/of13/match/22_ARP_SPA_Mask.json b/ryu/tests/switch/of13/match/22_ARP_SPA_Mask.json
index 8ff8d873..60da63c9 100644
--- a/ryu/tests/switch/of13/match/22_ARP_SPA_Mask.json
+++ b/ryu/tests/switch/of13/match/22_ARP_SPA_Mask.json
@@ -47,12 +47,12 @@
                 "ingress":[
                     "ethernet(dst='22:22:22:22:22:22', src='12:11:11:11:11:11', ethertype=2054)",
                     "arp(dst_ip='192.168.20.20',dst_mac='22:22:22:22:22:22', opcode=1, src_ip='192.168.10.10',src_mac='12:11:11:11:11:11')",
-                    "'\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00'"
+                    "str(\"\\x00\" * (60 - 42))"
                 ],
                 "egress":[
                     "ethernet(dst='22:22:22:22:22:22', src='12:11:11:11:11:11', ethertype=2054)",
                     "arp(dst_ip='192.168.20.20',dst_mac='22:22:22:22:22:22', opcode=1, src_ip='192.168.10.10',src_mac='12:11:11:11:11:11')",
-                    "'\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00'"
+                    "str(\"\\x00\" * (60 - 42))"
                 ]
             }
         ]
@@ -105,12 +105,12 @@
                 "ingress":[
                     "ethernet(dst='22:22:22:22:22:22', src='12:11:11:11:11:11', ethertype=2054)",
                     "arp(dst_ip='192.168.20.20',dst_mac='22:22:22:22:22:22', opcode=1, src_ip='192.168.10.10',src_mac='12:11:11:11:11:11')",
-                    "'\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00'"
+                    "str(\"\\x00\" * (60 - 42))"
                 ],
                 "PACKET_IN":[
                     "ethernet(dst='22:22:22:22:22:22', src='12:11:11:11:11:11', ethertype=2054)",
                     "arp(dst_ip='192.168.20.20',dst_mac='22:22:22:22:22:22', opcode=1, src_ip='192.168.10.10',src_mac='12:11:11:11:11:11')",
-                    "'\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00'"
+                    "str(\"\\x00\" * (60 - 42))"
                 ]
             }
         ]
@@ -162,7 +162,7 @@
                 "ingress":[
                     "ethernet(dst='ba:bb:bb:bb:bb:bb', src='aa:aa:aa:aa:aa:aa', ethertype=2054)",
                     "arp(dst_ip='10.10.20.20',dst_mac='ba:bb:bb:bb:bb:bb', opcode=2, src_ip='10.10.10.10',src_mac='aa:aa:aa:aa:aa:aa')",
-                    "'\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00'"
+                    "str(\"\\x00\" * (60 - 42))"
                 ],
                 "table-miss":[
                     0
@@ -429,12 +429,12 @@
                     "ethernet(dst='22:22:22:22:22:22', src='12:11:11:11:11:11', ethertype=34887)",
                     "mpls(bsb=1, label=100, exp=3, ttl=64)",
                     "arp(dst_ip='192.168.20.20',dst_mac='22:22:22:22:22:22', opcode=1, src_ip='192.168.10.10',src_mac='12:11:11:11:11:11')",
-                    "'\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00'"
+                    "str(\"\\x00\" * (60 - 42))"
                 ],
                 "egress":[
                     "ethernet(dst='22:22:22:22:22:22', src='12:11:11:11:11:11', ethertype=2054)",
                     "arp(dst_ip='192.168.20.20',dst_mac='22:22:22:22:22:22', opcode=1, src_ip='192.168.10.10',src_mac='12:11:11:11:11:11')",
-                    "'\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00'"
+                    "str(\"\\x00\" * (60 - 42))"
                 ]
             }
         ]
@@ -524,12 +524,12 @@
                     "ethernet(dst='22:22:22:22:22:22', src='12:11:11:11:11:11', ethertype=34887)",
                     "mpls(bsb=1, label=100, exp=3, ttl=64)",
                     "arp(dst_ip='192.168.20.20',dst_mac='22:22:22:22:22:22', opcode=1, src_ip='192.168.10.10',src_mac='12:11:11:11:11:11')",
-                    "'\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00'"
+                    "str(\"\\x00\" * (60 - 42))"
                 ],
                 "PACKET_IN":[
                     "ethernet(dst='22:22:22:22:22:22', src='12:11:11:11:11:11', ethertype=2054)",
                     "arp(dst_ip='192.168.20.20',dst_mac='22:22:22:22:22:22', opcode=1, src_ip='192.168.10.10',src_mac='12:11:11:11:11:11')",
-                    "'\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00'"
+                    "str(\"\\x00\" * (60 - 42))"
                 ]
             }
         ]
@@ -618,7 +618,7 @@
                     "ethernet(dst='ba:bb:bb:bb:bb:bb', src='aa:aa:aa:aa:aa:aa', ethertype=34887)",
                     "mpls(bsb=1, label=203, exp=5, ttl=127)",
                     "arp(dst_ip='10.10.20.20',dst_mac='ba:bb:bb:bb:bb:bb', opcode=2, src_ip='10.10.10.10',src_mac='aa:aa:aa:aa:aa:aa')",
-                    "'\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00'"
+                    "str(\"\\x00\" * (60 - 42))"
                 ],
                 "table-miss":[
                     1
@@ -709,12 +709,12 @@
                     "itag(sid=100)",
                     "ethernet(dst='22:22:22:22:22:22', src='12:11:11:11:11:11', ethertype=2054)",
                     "arp(dst_ip='192.168.20.20',dst_mac='22:22:22:22:22:22', opcode=1, src_ip='192.168.10.10',src_mac='12:11:11:11:11:11')",
-                    "'\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00'"
+                    "str(\"\\x00\" * (60 - 42))"
                 ],
                 "egress":[
                     "ethernet(dst='22:22:22:22:22:22', src='12:11:11:11:11:11', ethertype=2054)",
                     "arp(dst_ip='192.168.20.20',dst_mac='22:22:22:22:22:22', opcode=1, src_ip='192.168.10.10',src_mac='12:11:11:11:11:11')",
-                    "'\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00'"
+                    "str(\"\\x00\" * (60 - 42))"
                 ]
             }
         ]
@@ -803,12 +803,12 @@
                     "itag(sid=100)",
                     "ethernet(dst='22:22:22:22:22:22', src='12:11:11:11:11:11', ethertype=2054)",
                     "arp(dst_ip='192.168.20.20',dst_mac='22:22:22:22:22:22', opcode=1, src_ip='192.168.10.10',src_mac='12:11:11:11:11:11')",
-                    "'\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00'"
+                    "str(\"\\x00\" * (60 - 42))"
                 ],
                 "PACKET_IN":[
                     "ethernet(dst='22:22:22:22:22:22', src='12:11:11:11:11:11', ethertype=2054)",
                     "arp(dst_ip='192.168.20.20',dst_mac='22:22:22:22:22:22', opcode=1, src_ip='192.168.10.10',src_mac='12:11:11:11:11:11')",
-                    "'\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00'"
+                    "str(\"\\x00\" * (60 - 42))"
                 ]
             }
         ]
@@ -896,7 +896,7 @@
                     "itag(sid=203)",
                     "ethernet(dst='ba:bb:bb:bb:bb:bb', src='aa:aa:aa:aa:aa:aa', ethertype=2054)",
                     "arp(dst_ip='10.10.20.20',dst_mac='ba:bb:bb:bb:bb:bb', opcode=2, src_ip='10.10.10.10',src_mac='aa:aa:aa:aa:aa:aa')",
-                    "'\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00'"
+                    "str(\"\\x00\" * (60 - 42))"
                 ],
                 "table-miss":[
                     1
diff --git a/ryu/tests/switch/of13/match/23_ARP_TPA.json b/ryu/tests/switch/of13/match/23_ARP_TPA.json
index b52c029c..def206e3 100644
--- a/ryu/tests/switch/of13/match/23_ARP_TPA.json
+++ b/ryu/tests/switch/of13/match/23_ARP_TPA.json
@@ -46,12 +46,12 @@
                 "ingress":[
                     "ethernet(dst='22:22:22:22:22:22', src='12:11:11:11:11:11', ethertype=2054)",
                     "arp(dst_ip='192.168.20.20',dst_mac='22:22:22:22:22:22', opcode=1, src_ip='192.168.10.10',src_mac='12:11:11:11:11:11')",
-                    "'\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00'"
+                    "str(\"\\x00\" * (60 - 42))"
                 ],
                 "egress":[
                     "ethernet(dst='22:22:22:22:22:22', src='12:11:11:11:11:11', ethertype=2054)",
                     "arp(dst_ip='192.168.20.20',dst_mac='22:22:22:22:22:22', opcode=1, src_ip='192.168.10.10',src_mac='12:11:11:11:11:11')",
-                    "'\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00'"
+                    "str(\"\\x00\" * (60 - 42))"
                 ]
             }
         ]
@@ -103,12 +103,12 @@
                 "ingress":[
                     "ethernet(dst='22:22:22:22:22:22', src='12:11:11:11:11:11', ethertype=2054)",
                     "arp(dst_ip='192.168.20.20',dst_mac='22:22:22:22:22:22', opcode=1, src_ip='192.168.10.10',src_mac='12:11:11:11:11:11')",
-                    "'\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00'"
+                    "str(\"\\x00\" * (60 - 42))"
                 ],
                 "PACKET_IN":[
                     "ethernet(dst='22:22:22:22:22:22', src='12:11:11:11:11:11', ethertype=2054)",
                     "arp(dst_ip='192.168.20.20',dst_mac='22:22:22:22:22:22', opcode=1, src_ip='192.168.10.10',src_mac='12:11:11:11:11:11')",
-                    "'\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00'"
+                    "str(\"\\x00\" * (60 - 42))"
                 ]
             }
         ]
@@ -159,7 +159,7 @@
                 "ingress":[
                     "ethernet(dst='ba:bb:bb:bb:bb:bb', src='aa:aa:aa:aa:aa:aa', ethertype=2054)",
                     "arp(dst_ip='10.10.20.20',dst_mac='ba:bb:bb:bb:bb:bb', opcode=2, src_ip='10.10.10.10',src_mac='aa:aa:aa:aa:aa:aa')",
-                    "'\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00'"
+                    "str(\"\\x00\" * (60 - 42))"
                 ],
                 "table-miss":[
                     0
@@ -422,12 +422,12 @@
                     "ethernet(dst='22:22:22:22:22:22', src='12:11:11:11:11:11', ethertype=34887)",
                     "mpls(bsb=1, label=100, exp=3, ttl=64)",
                     "arp(dst_ip='192.168.20.20',dst_mac='22:22:22:22:22:22', opcode=1, src_ip='192.168.10.10',src_mac='12:11:11:11:11:11')",
-                    "'\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00'"
+                    "str(\"\\x00\" * (60 - 42))"
                 ],
                 "egress":[
                     "ethernet(dst='22:22:22:22:22:22', src='12:11:11:11:11:11', ethertype=2054)",
                     "arp(dst_ip='192.168.20.20',dst_mac='22:22:22:22:22:22', opcode=1, src_ip='192.168.10.10',src_mac='12:11:11:11:11:11')",
-                    "'\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00'"
+                    "str(\"\\x00\" * (60 - 42))"
                 ]
             }
         ]
@@ -516,12 +516,12 @@
                     "ethernet(dst='22:22:22:22:22:22', src='12:11:11:11:11:11', ethertype=34887)",
                     "mpls(bsb=1, label=100, exp=3, ttl=64)",
                     "arp(dst_ip='192.168.20.20',dst_mac='22:22:22:22:22:22', opcode=1, src_ip='192.168.10.10',src_mac='12:11:11:11:11:11')",
-                    "'\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00'"
+                    "str(\"\\x00\" * (60 - 42))"
                 ],
                 "PACKET_IN":[
                     "ethernet(dst='22:22:22:22:22:22', src='12:11:11:11:11:11', ethertype=2054)",
                     "arp(dst_ip='192.168.20.20',dst_mac='22:22:22:22:22:22', opcode=1, src_ip='192.168.10.10',src_mac='12:11:11:11:11:11')",
-                    "'\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00'"
+                    "str(\"\\x00\" * (60 - 42))"
                 ]
             }
         ]
@@ -609,7 +609,7 @@
                     "ethernet(dst='ba:bb:bb:bb:bb:bb', src='aa:aa:aa:aa:aa:aa', ethertype=34887)",
                     "mpls(bsb=1, label=203, exp=5, ttl=127)",
                     "arp(dst_ip='10.10.20.20',dst_mac='ba:bb:bb:bb:bb:bb', opcode=2, src_ip='10.10.10.10',src_mac='aa:aa:aa:aa:aa:aa')",
-                    "'\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00'"
+                    "str(\"\\x00\" * (60 - 42))"
                 ],
                 "table-miss":[
                     1
@@ -699,12 +699,12 @@
                     "itag(sid=100)",
                     "ethernet(dst='22:22:22:22:22:22', src='12:11:11:11:11:11', ethertype=2054)",
                     "arp(dst_ip='192.168.20.20',dst_mac='22:22:22:22:22:22', opcode=1, src_ip='192.168.10.10',src_mac='12:11:11:11:11:11')",
-                    "'\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00'"
+                    "str(\"\\x00\" * (60 - 42))"
                 ],
                 "egress":[
                     "ethernet(dst='22:22:22:22:22:22', src='12:11:11:11:11:11', ethertype=2054)",
                     "arp(dst_ip='192.168.20.20',dst_mac='22:22:22:22:22:22', opcode=1, src_ip='192.168.10.10',src_mac='12:11:11:11:11:11')",
-                    "'\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00'"
+                    "str(\"\\x00\" * (60 - 42))"
                 ]
             }
         ]
@@ -792,12 +792,12 @@
                     "itag(sid=100)",
                     "ethernet(dst='22:22:22:22:22:22', src='12:11:11:11:11:11', ethertype=2054)",
                     "arp(dst_ip='192.168.20.20',dst_mac='22:22:22:22:22:22', opcode=1, src_ip='192.168.10.10',src_mac='12:11:11:11:11:11')",
-                    "'\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00'"
+                    "str(\"\\x00\" * (60 - 42))"
                 ],
                 "PACKET_IN":[
                     "ethernet(dst='22:22:22:22:22:22', src='12:11:11:11:11:11', ethertype=2054)",
                     "arp(dst_ip='192.168.20.20',dst_mac='22:22:22:22:22:22', opcode=1, src_ip='192.168.10.10',src_mac='12:11:11:11:11:11')",
-                    "'\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00'"
+                    "str(\"\\x00\" * (60 - 42))"
                 ]
             }
         ]
@@ -884,7 +884,7 @@
                     "itag(sid=203)",
                     "ethernet(dst='ba:bb:bb:bb:bb:bb', src='aa:aa:aa:aa:aa:aa', ethertype=2054)",
                     "arp(dst_ip='10.10.20.20',dst_mac='ba:bb:bb:bb:bb:bb', opcode=2, src_ip='10.10.10.10',src_mac='aa:aa:aa:aa:aa:aa')",
-                    "'\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00'"
+                    "str(\"\\x00\" * (60 - 42))"
                 ],
                 "table-miss":[
                     1
diff --git a/ryu/tests/switch/of13/match/23_ARP_TPA_Mask.json b/ryu/tests/switch/of13/match/23_ARP_TPA_Mask.json
index bbd758d2..69052e3f 100644
--- a/ryu/tests/switch/of13/match/23_ARP_TPA_Mask.json
+++ b/ryu/tests/switch/of13/match/23_ARP_TPA_Mask.json
@@ -47,12 +47,12 @@
                 "ingress":[
                     "ethernet(dst='22:22:22:22:22:22', src='12:11:11:11:11:11', ethertype=2054)",
                     "arp(dst_ip='192.168.20.20',dst_mac='22:22:22:22:22:22', opcode=1, src_ip='192.168.10.10',src_mac='12:11:11:11:11:11')",
-                    "'\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00'"
+                    "str(\"\\x00\" * (60 - 42))"
                 ],
                 "egress":[
                     "ethernet(dst='22:22:22:22:22:22', src='12:11:11:11:11:11', ethertype=2054)",
                     "arp(dst_ip='192.168.20.20',dst_mac='22:22:22:22:22:22', opcode=1, src_ip='192.168.10.10',src_mac='12:11:11:11:11:11')",
-                    "'\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00'"
+                    "str(\"\\x00\" * (60 - 42))"
                 ]
             }
         ]
@@ -105,12 +105,12 @@
                 "ingress":[
                     "ethernet(dst='22:22:22:22:22:22', src='12:11:11:11:11:11', ethertype=2054)",
                     "arp(dst_ip='192.168.20.20',dst_mac='22:22:22:22:22:22', opcode=1, src_ip='192.168.10.10',src_mac='12:11:11:11:11:11')",
-                    "'\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00'"
+                    "str(\"\\x00\" * (60 - 42))"
                 ],
                 "PACKET_IN":[
                     "ethernet(dst='22:22:22:22:22:22', src='12:11:11:11:11:11', ethertype=2054)",
                     "arp(dst_ip='192.168.20.20',dst_mac='22:22:22:22:22:22', opcode=1, src_ip='192.168.10.10',src_mac='12:11:11:11:11:11')",
-                    "'\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00'"
+                    "str(\"\\x00\" * (60 - 42))"
                 ]
             }
         ]
@@ -162,7 +162,7 @@
                 "ingress":[
                     "ethernet(dst='ba:bb:bb:bb:bb:bb', src='aa:aa:aa:aa:aa:aa', ethertype=2054)",
                     "arp(dst_ip='10.10.20.20',dst_mac='ba:bb:bb:bb:bb:bb', opcode=2, src_ip='10.10.10.10',src_mac='aa:aa:aa:aa:aa:aa')",
-                    "'\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00'"
+                    "str(\"\\x00\" * (60 - 42))"
                 ],
                 "table-miss":[
                     0
@@ -429,12 +429,12 @@
                     "ethernet(dst='22:22:22:22:22:22', src='12:11:11:11:11:11', ethertype=34887)",
                     "mpls(bsb=1, label=100, exp=3, ttl=64)",
                     "arp(dst_ip='192.168.20.20',dst_mac='22:22:22:22:22:22', opcode=1, src_ip='192.168.10.10',src_mac='12:11:11:11:11:11')",
-                    "'\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00'"
+                    "str(\"\\x00\" * (60 - 42))"
                 ],
                 "egress":[
                     "ethernet(dst='22:22:22:22:22:22', src='12:11:11:11:11:11', ethertype=2054)",
                     "arp(dst_ip='192.168.20.20',dst_mac='22:22:22:22:22:22', opcode=1, src_ip='192.168.10.10',src_mac='12:11:11:11:11:11')",
-                    "'\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00'"
+                    "str(\"\\x00\" * (60 - 42))"
                 ]
             }
         ]
@@ -524,12 +524,12 @@
                     "ethernet(dst='22:22:22:22:22:22', src='12:11:11:11:11:11', ethertype=34887)",
                     "mpls(bsb=1, label=100, exp=3, ttl=64)",
                     "arp(dst_ip='192.168.20.20',dst_mac='22:22:22:22:22:22', opcode=1, src_ip='192.168.10.10',src_mac='12:11:11:11:11:11')",
-                    "'\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00'"
+                    "str(\"\\x00\" * (60 - 42))"
                 ],
                 "PACKET_IN":[
                     "ethernet(dst='22:22:22:22:22:22', src='12:11:11:11:11:11', ethertype=2054)",
                     "arp(dst_ip='192.168.20.20',dst_mac='22:22:22:22:22:22', opcode=1, src_ip='192.168.10.10',src_mac='12:11:11:11:11:11')",
-                    "'\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00'"
+                    "str(\"\\x00\" * (60 - 42))"
                 ]
             }
         ]
@@ -618,7 +618,7 @@
                     "ethernet(dst='ba:bb:bb:bb:bb:bb', src='aa:aa:aa:aa:aa:aa', ethertype=34887)",
                     "mpls(bsb=1, label=203, exp=5, ttl=127)",
                     "arp(dst_ip='10.10.20.20',dst_mac='ba:bb:bb:bb:bb:bb', opcode=2, src_ip='10.10.10.10',src_mac='aa:aa:aa:aa:aa:aa')",
-                    "'\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00'"
+                    "str(\"\\x00\" * (60 - 42))"
                 ],
                 "table-miss":[
                     1
@@ -709,12 +709,12 @@
                     "itag(sid=100)",
                     "ethernet(dst='22:22:22:22:22:22', src='12:11:11:11:11:11', ethertype=2054)",
                     "arp(dst_ip='192.168.20.20',dst_mac='22:22:22:22:22:22', opcode=1, src_ip='192.168.10.10',src_mac='12:11:11:11:11:11')",
-                    "'\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00'"
+                    "str(\"\\x00\" * (60 - 42))"
                 ],
                 "egress":[
                     "ethernet(dst='22:22:22:22:22:22', src='12:11:11:11:11:11', ethertype=2054)",
                     "arp(dst_ip='192.168.20.20',dst_mac='22:22:22:22:22:22', opcode=1, src_ip='192.168.10.10',src_mac='12:11:11:11:11:11')",
-                    "'\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00'"
+                    "str(\"\\x00\" * (60 - 42))"
                 ]
             }
         ]
@@ -803,12 +803,12 @@
                     "itag(sid=100)",
                     "ethernet(dst='22:22:22:22:22:22', src='12:11:11:11:11:11', ethertype=2054)",
                     "arp(dst_ip='192.168.20.20',dst_mac='22:22:22:22:22:22', opcode=1, src_ip='192.168.10.10',src_mac='12:11:11:11:11:11')",
-                    "'\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00'"
+                    "str(\"\\x00\" * (60 - 42))"
                 ],
                 "PACKET_IN":[
                     "ethernet(dst='22:22:22:22:22:22', src='12:11:11:11:11:11', ethertype=2054)",
                     "arp(dst_ip='192.168.20.20',dst_mac='22:22:22:22:22:22', opcode=1, src_ip='192.168.10.10',src_mac='12:11:11:11:11:11')",
-                    "'\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00'"
+                    "str(\"\\x00\" * (60 - 42))"
                 ]
             }
         ]
@@ -896,7 +896,7 @@
                     "itag(sid=203)",
                     "ethernet(dst='ba:bb:bb:bb:bb:bb', src='aa:aa:aa:aa:aa:aa', ethertype=2054)",
                     "arp(dst_ip='10.10.20.20',dst_mac='ba:bb:bb:bb:bb:bb', opcode=2, src_ip='10.10.10.10',src_mac='aa:aa:aa:aa:aa:aa')",
-                    "'\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00'"
+                    "str(\"\\x00\" * (60 - 42))"
                 ],
                 "table-miss":[
                     1
diff --git a/ryu/tests/switch/of13/match/24_ARP_SHA.json b/ryu/tests/switch/of13/match/24_ARP_SHA.json
index 637ec5e7..b6ceaf16 100644
--- a/ryu/tests/switch/of13/match/24_ARP_SHA.json
+++ b/ryu/tests/switch/of13/match/24_ARP_SHA.json
@@ -46,12 +46,12 @@
                 "ingress":[
                     "ethernet(dst='22:22:22:22:22:22', src='12:11:11:11:11:11', ethertype=2054)",
                     "arp(dst_ip='192.168.20.20',dst_mac='22:22:22:22:22:22', opcode=1, src_ip='192.168.10.10',src_mac='12:11:11:11:11:11')",
-                    "'\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00'"
+                    "str(\"\\x00\" * (60 - 42))"
                 ],
                 "egress":[
                     "ethernet(dst='22:22:22:22:22:22', src='12:11:11:11:11:11', ethertype=2054)",
                     "arp(dst_ip='192.168.20.20',dst_mac='22:22:22:22:22:22', opcode=1, src_ip='192.168.10.10',src_mac='12:11:11:11:11:11')",
-                    "'\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00'"
+                    "str(\"\\x00\" * (60 - 42))"
                 ]
             }
         ]
@@ -103,12 +103,12 @@
                 "ingress":[
                     "ethernet(dst='22:22:22:22:22:22', src='12:11:11:11:11:11', ethertype=2054)",
                     "arp(dst_ip='192.168.20.20',dst_mac='22:22:22:22:22:22', opcode=1, src_ip='192.168.10.10',src_mac='12:11:11:11:11:11')",
-                    "'\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00'"
+                    "str(\"\\x00\" * (60 - 42))"
                 ],
                 "PACKET_IN":[
                     "ethernet(dst='22:22:22:22:22:22', src='12:11:11:11:11:11', ethertype=2054)",
                     "arp(dst_ip='192.168.20.20',dst_mac='22:22:22:22:22:22', opcode=1, src_ip='192.168.10.10',src_mac='12:11:11:11:11:11')",
-                    "'\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00'"
+                    "str(\"\\x00\" * (60 - 42))"
                 ]
             }
         ]
@@ -159,7 +159,7 @@
                 "ingress":[
                     "ethernet(dst='ba:bb:bb:bb:bb:bb', src='aa:aa:aa:aa:aa:aa', ethertype=2054)",
                     "arp(dst_ip='10.10.20.20',dst_mac='ba:bb:bb:bb:bb:bb', opcode=2, src_ip='10.10.10.10',src_mac='aa:aa:aa:aa:aa:aa')",
-                    "'\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00'"
+                    "str(\"\\x00\" * (60 - 42))"
                 ],
                 "table-miss":[
                     0
@@ -422,12 +422,12 @@
                     "ethernet(dst='22:22:22:22:22:22', src='12:11:11:11:11:11', ethertype=34887)",
                     "mpls(bsb=1, label=100, exp=3, ttl=64)",
                     "arp(dst_ip='192.168.20.20',dst_mac='22:22:22:22:22:22', opcode=1, src_ip='192.168.10.10',src_mac='12:11:11:11:11:11')",
-                    "'\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00'"
+                    "str(\"\\x00\" * (60 - 42))"
                 ],
                 "egress":[
                     "ethernet(dst='22:22:22:22:22:22', src='12:11:11:11:11:11', ethertype=2054)",
                     "arp(dst_ip='192.168.20.20',dst_mac='22:22:22:22:22:22', opcode=1, src_ip='192.168.10.10',src_mac='12:11:11:11:11:11')",
-                    "'\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00'"
+                    "str(\"\\x00\" * (60 - 42))"
                 ]
             }
         ]
@@ -516,12 +516,12 @@
                     "ethernet(dst='22:22:22:22:22:22', src='12:11:11:11:11:11', ethertype=34887)",
                     "mpls(bsb=1, label=100, exp=3, ttl=64)",
                     "arp(dst_ip='192.168.20.20',dst_mac='22:22:22:22:22:22', opcode=1, src_ip='192.168.10.10',src_mac='12:11:11:11:11:11')",
-                    "'\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00'"
+                    "str(\"\\x00\" * (60 - 42))"
                 ],
                 "PACKET_IN":[
                     "ethernet(dst='22:22:22:22:22:22', src='12:11:11:11:11:11', ethertype=2054)",
                     "arp(dst_ip='192.168.20.20',dst_mac='22:22:22:22:22:22', opcode=1, src_ip='192.168.10.10',src_mac='12:11:11:11:11:11')",
-                    "'\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00'"
+                    "str(\"\\x00\" * (60 - 42))"
                 ]
             }
         ]
@@ -609,7 +609,7 @@
                     "ethernet(dst='ba:bb:bb:bb:bb:bb', src='aa:aa:aa:aa:aa:aa', ethertype=34887)",
                     "mpls(bsb=1, label=203, exp=5, ttl=127)",
                     "arp(dst_ip='10.10.20.20',dst_mac='ba:bb:bb:bb:bb:bb', opcode=2, src_ip='10.10.10.10',src_mac='aa:aa:aa:aa:aa:aa')",
-                    "'\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00'"
+                    "str(\"\\x00\" * (60 - 42))"
                 ],
                 "table-miss":[
                     1
@@ -699,12 +699,12 @@
                     "itag(sid=100)",
                     "ethernet(dst='22:22:22:22:22:22', src='12:11:11:11:11:11', ethertype=2054)",
                     "arp(dst_ip='192.168.20.20',dst_mac='22:22:22:22:22:22', opcode=1, src_ip='192.168.10.10',src_mac='12:11:11:11:11:11')",
-                    "'\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00'"
+                    "str(\"\\x00\" * (60 - 42))"
                 ],
                 "egress":[
                     "ethernet(dst='22:22:22:22:22:22', src='12:11:11:11:11:11', ethertype=2054)",
                     "arp(dst_ip='192.168.20.20',dst_mac='22:22:22:22:22:22', opcode=1, src_ip='192.168.10.10',src_mac='12:11:11:11:11:11')",
-                    "'\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00'"
+                    "str(\"\\x00\" * (60 - 42))"
                 ]
             }
         ]
@@ -792,12 +792,12 @@
                     "itag(sid=100)",
                     "ethernet(dst='22:22:22:22:22:22', src='12:11:11:11:11:11', ethertype=2054)",
                     "arp(dst_ip='192.168.20.20',dst_mac='22:22:22:22:22:22', opcode=1, src_ip='192.168.10.10',src_mac='12:11:11:11:11:11')",
-                    "'\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00'"
+                    "str(\"\\x00\" * (60 - 42))"
                 ],
                 "PACKET_IN":[
                     "ethernet(dst='22:22:22:22:22:22', src='12:11:11:11:11:11', ethertype=2054)",
                     "arp(dst_ip='192.168.20.20',dst_mac='22:22:22:22:22:22', opcode=1, src_ip='192.168.10.10',src_mac='12:11:11:11:11:11')",
-                    "'\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00'"
+                    "str(\"\\x00\" * (60 - 42))"
                 ]
             }
         ]
@@ -884,7 +884,7 @@
                     "itag(sid=203)",
                     "ethernet(dst='ba:bb:bb:bb:bb:bb', src='aa:aa:aa:aa:aa:aa', ethertype=2054)",
                     "arp(dst_ip='10.10.20.20',dst_mac='ba:bb:bb:bb:bb:bb', opcode=2, src_ip='10.10.10.10',src_mac='aa:aa:aa:aa:aa:aa')",
-                    "'\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00'"
+                    "str(\"\\x00\" * (60 - 42))"
                 ],
                 "table-miss":[
                     1
diff --git a/ryu/tests/switch/of13/match/24_ARP_SHA_Mask.json b/ryu/tests/switch/of13/match/24_ARP_SHA_Mask.json
index 5bfc3cde..1a0c7338 100644
--- a/ryu/tests/switch/of13/match/24_ARP_SHA_Mask.json
+++ b/ryu/tests/switch/of13/match/24_ARP_SHA_Mask.json
@@ -47,12 +47,12 @@
                 "ingress":[
                     "ethernet(dst='22:22:22:22:22:22', src='12:11:11:11:11:11', ethertype=2054)",
                     "arp(dst_ip='192.168.20.20',dst_mac='22:22:22:22:22:22', opcode=1, src_ip='192.168.10.10',src_mac='12:11:11:11:11:11')",
-                    "'\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00'"
+                    "str(\"\\x00\" * (60 - 42))"
                 ],
                 "egress":[
                     "ethernet(dst='22:22:22:22:22:22', src='12:11:11:11:11:11', ethertype=2054)",
                     "arp(dst_ip='192.168.20.20',dst_mac='22:22:22:22:22:22', opcode=1, src_ip='192.168.10.10',src_mac='12:11:11:11:11:11')",
-                    "'\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00'"
+                    "str(\"\\x00\" * (60 - 42))"
                 ]
             }
         ]
@@ -105,12 +105,12 @@
                 "ingress":[
                     "ethernet(dst='22:22:22:22:22:22', src='12:11:11:11:11:11', ethertype=2054)",
                     "arp(dst_ip='192.168.20.20',dst_mac='22:22:22:22:22:22', opcode=1, src_ip='192.168.10.10',src_mac='12:11:11:11:11:11')",
-                    "'\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00'"
+                    "str(\"\\x00\" * (60 - 42))"
                 ],
                 "PACKET_IN":[
                     "ethernet(dst='22:22:22:22:22:22', src='12:11:11:11:11:11', ethertype=2054)",
                     "arp(dst_ip='192.168.20.20',dst_mac='22:22:22:22:22:22', opcode=1, src_ip='192.168.10.10',src_mac='12:11:11:11:11:11')",
-                    "'\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00'"
+                    "str(\"\\x00\" * (60 - 42))"
                 ]
             }
         ]
@@ -162,7 +162,7 @@
                 "ingress":[
                     "ethernet(dst='ba:bb:bb:bb:bb:bb', src='aa:aa:aa:aa:aa:aa', ethertype=2054)",
                     "arp(dst_ip='10.10.20.20',dst_mac='ba:bb:bb:bb:bb:bb', opcode=2, src_ip='10.10.10.10',src_mac='aa:aa:aa:aa:aa:aa')",
-                    "'\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00'"
+                    "str(\"\\x00\" * (60 - 42))"
                 ],
                 "table-miss":[
                     0
@@ -429,12 +429,12 @@
                     "ethernet(dst='22:22:22:22:22:22', src='12:11:11:11:11:11', ethertype=34887)",
                     "mpls(bsb=1, label=100, exp=3, ttl=64)",
                     "arp(dst_ip='192.168.20.20',dst_mac='22:22:22:22:22:22', opcode=1, src_ip='192.168.10.10',src_mac='12:11:11:11:11:11')",
-                    "'\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00'"
+                    "str(\"\\x00\" * (60 - 42))"
                 ],
                 "egress":[
                     "ethernet(dst='22:22:22:22:22:22', src='12:11:11:11:11:11', ethertype=2054)",
                     "arp(dst_ip='192.168.20.20',dst_mac='22:22:22:22:22:22', opcode=1, src_ip='192.168.10.10',src_mac='12:11:11:11:11:11')",
-                    "'\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00'"
+                    "str(\"\\x00\" * (60 - 42))"
                 ]
             }
         ]
@@ -524,12 +524,12 @@
                     "ethernet(dst='22:22:22:22:22:22', src='12:11:11:11:11:11', ethertype=34887)",
                     "mpls(bsb=1, label=100, exp=3, ttl=64)",
                     "arp(dst_ip='192.168.20.20',dst_mac='22:22:22:22:22:22', opcode=1, src_ip='192.168.10.10',src_mac='12:11:11:11:11:11')",
-                    "'\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00'"
+                    "str(\"\\x00\" * (60 - 42))"
                 ],
                 "PACKET_IN":[
                     "ethernet(dst='22:22:22:22:22:22', src='12:11:11:11:11:11', ethertype=2054)",
                     "arp(dst_ip='192.168.20.20',dst_mac='22:22:22:22:22:22', opcode=1, src_ip='192.168.10.10',src_mac='12:11:11:11:11:11')",
-                    "'\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00'"
+                    "str(\"\\x00\" * (60 - 42))"
                 ]
             }
         ]
@@ -618,7 +618,7 @@
                     "ethernet(dst='ba:bb:bb:bb:bb:bb', src='aa:aa:aa:aa:aa:aa', ethertype=34887)",
                     "mpls(bsb=1, label=203, exp=5, ttl=127)",
                     "arp(dst_ip='10.10.20.20',dst_mac='ba:bb:bb:bb:bb:bb', opcode=2, src_ip='10.10.10.10',src_mac='aa:aa:aa:aa:aa:aa')",
-                    "'\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00'"
+                    "str(\"\\x00\" * (60 - 42))"
                 ],
                 "table-miss":[
                     1
@@ -709,12 +709,12 @@
                     "itag(sid=100)",
                     "ethernet(dst='22:22:22:22:22:22', src='12:11:11:11:11:11', ethertype=2054)",
                     "arp(dst_ip='192.168.20.20',dst_mac='22:22:22:22:22:22', opcode=1, src_ip='192.168.10.10',src_mac='12:11:11:11:11:11')",
-                    "'\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00'"
+                    "str(\"\\x00\" * (60 - 42))"
                 ],
                 "egress":[
                     "ethernet(dst='22:22:22:22:22:22', src='12:11:11:11:11:11', ethertype=2054)",
                     "arp(dst_ip='192.168.20.20',dst_mac='22:22:22:22:22:22', opcode=1, src_ip='192.168.10.10',src_mac='12:11:11:11:11:11')",
-                    "'\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00'"
+                    "str(\"\\x00\" * (60 - 42))"
                 ]
             }
         ]
@@ -803,12 +803,12 @@
                     "itag(sid=100)",
                     "ethernet(dst='22:22:22:22:22:22', src='12:11:11:11:11:11', ethertype=2054)",
                     "arp(dst_ip='192.168.20.20',dst_mac='22:22:22:22:22:22', opcode=1, src_ip='192.168.10.10',src_mac='12:11:11:11:11:11')",
-                    "'\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00'"
+                    "str(\"\\x00\" * (60 - 42))"
                 ],
                 "PACKET_IN":[
                     "ethernet(dst='22:22:22:22:22:22', src='12:11:11:11:11:11', ethertype=2054)",
                     "arp(dst_ip='192.168.20.20',dst_mac='22:22:22:22:22:22', opcode=1, src_ip='192.168.10.10',src_mac='12:11:11:11:11:11')",
-                    "'\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00'"
+                    "str(\"\\x00\" * (60 - 42))"
                 ]
             }
         ]
@@ -896,7 +896,7 @@
                     "itag(sid=203)",
                     "ethernet(dst='ba:bb:bb:bb:bb:bb', src='aa:aa:aa:aa:aa:aa', ethertype=2054)",
                     "arp(dst_ip='10.10.20.20',dst_mac='ba:bb:bb:bb:bb:bb', opcode=2, src_ip='10.10.10.10',src_mac='aa:aa:aa:aa:aa:aa')",
-                    "'\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00'"
+                    "str(\"\\x00\" * (60 - 42))"
                 ],
                 "table-miss":[
                     1
diff --git a/ryu/tests/switch/of13/match/25_ARP_THA.json b/ryu/tests/switch/of13/match/25_ARP_THA.json
index ee00d72f..2fc1dfca 100644
--- a/ryu/tests/switch/of13/match/25_ARP_THA.json
+++ b/ryu/tests/switch/of13/match/25_ARP_THA.json
@@ -46,12 +46,12 @@
                 "ingress":[
                     "ethernet(dst='22:22:22:22:22:22', src='12:11:11:11:11:11', ethertype=2054)",
                     "arp(dst_ip='192.168.20.20',dst_mac='22:22:22:22:22:22', opcode=1, src_ip='192.168.10.10',src_mac='12:11:11:11:11:11')",
-                    "'\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00'"
+                    "str(\"\\x00\" * (60 - 42))"
                 ],
                 "egress":[
                     "ethernet(dst='22:22:22:22:22:22', src='12:11:11:11:11:11', ethertype=2054)",
                     "arp(dst_ip='192.168.20.20',dst_mac='22:22:22:22:22:22', opcode=1, src_ip='192.168.10.10',src_mac='12:11:11:11:11:11')",
-                    "'\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00'"
+                    "str(\"\\x00\" * (60 - 42))"
                 ]
             }
         ]
@@ -103,12 +103,12 @@
                 "ingress":[
                     "ethernet(dst='22:22:22:22:22:22', src='12:11:11:11:11:11', ethertype=2054)",
                     "arp(dst_ip='192.168.20.20',dst_mac='22:22:22:22:22:22', opcode=1, src_ip='192.168.10.10',src_mac='12:11:11:11:11:11')",
-                    "'\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00'"
+                    "str(\"\\x00\" * (60 - 42))"
                 ],
                 "PACKET_IN":[
                     "ethernet(dst='22:22:22:22:22:22', src='12:11:11:11:11:11', ethertype=2054)",
                     "arp(dst_ip='192.168.20.20',dst_mac='22:22:22:22:22:22', opcode=1, src_ip='192.168.10.10',src_mac='12:11:11:11:11:11')",
-                    "'\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00'"
+                    "str(\"\\x00\" * (60 - 42))"
                 ]
             }
         ]
@@ -159,7 +159,7 @@
                 "ingress":[
                     "ethernet(dst='ba:bb:bb:bb:bb:bb', src='aa:aa:aa:aa:aa:aa', ethertype=2054)",
                     "arp(dst_ip='10.10.20.20',dst_mac='ba:bb:bb:bb:bb:bb', opcode=2, src_ip='10.10.10.10',src_mac='aa:aa:aa:aa:aa:aa')",
-                    "'\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00'"
+                    "str(\"\\x00\" * (60 - 42))"
                 ],
                 "table-miss":[
                     0
@@ -422,12 +422,12 @@
                     "ethernet(dst='22:22:22:22:22:22', src='12:11:11:11:11:11', ethertype=34887)",
                     "mpls(bsb=1, label=100, exp=3, ttl=64)",
                     "arp(dst_ip='192.168.20.20',dst_mac='22:22:22:22:22:22', opcode=1, src_ip='192.168.10.10',src_mac='12:11:11:11:11:11')",
-                    "'\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00'"
+                    "str(\"\\x00\" * (60 - 42))"
                 ],
                 "egress":[
                     "ethernet(dst='22:22:22:22:22:22', src='12:11:11:11:11:11', ethertype=2054)",
                     "arp(dst_ip='192.168.20.20',dst_mac='22:22:22:22:22:22', opcode=1, src_ip='192.168.10.10',src_mac='12:11:11:11:11:11')",
-                    "'\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00'"
+                    "str(\"\\x00\" * (60 - 42))"
                 ]
             }
         ]
@@ -516,12 +516,12 @@
                     "ethernet(dst='22:22:22:22:22:22', src='12:11:11:11:11:11', ethertype=34887)",
                     "mpls(bsb=1, label=100, exp=3, ttl=64)",
                     "arp(dst_ip='192.168.20.20',dst_mac='22:22:22:22:22:22', opcode=1, src_ip='192.168.10.10',src_mac='12:11:11:11:11:11')",
-                    "'\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00'"
+                    "str(\"\\x00\" * (60 - 42))"
                 ],
                 "PACKET_IN":[
                     "ethernet(dst='22:22:22:22:22:22', src='12:11:11:11:11:11', ethertype=2054)",
                     "arp(dst_ip='192.168.20.20',dst_mac='22:22:22:22:22:22', opcode=1, src_ip='192.168.10.10',src_mac='12:11:11:11:11:11')",
-                    "'\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00'"
+                    "str(\"\\x00\" * (60 - 42))"
                 ]
             }
         ]
@@ -609,7 +609,7 @@
                     "ethernet(dst='ba:bb:bb:bb:bb:bb', src='aa:aa:aa:aa:aa:aa', ethertype=34887)",
                     "mpls(bsb=1, label=203, exp=5, ttl=127)",
                     "arp(dst_ip='10.10.20.20',dst_mac='ba:bb:bb:bb:bb:bb', opcode=2, src_ip='10.10.10.10',src_mac='aa:aa:aa:aa:aa:aa')",
-                    "'\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00'"
+                    "str(\"\\x00\" * (60 - 42))"
                 ],
                 "table-miss":[
                     1
@@ -699,12 +699,12 @@
                     "itag(sid=100)",
                     "ethernet(dst='22:22:22:22:22:22', src='12:11:11:11:11:11', ethertype=2054)",
                     "arp(dst_ip='192.168.20.20',dst_mac='22:22:22:22:22:22', opcode=1, src_ip='192.168.10.10',src_mac='12:11:11:11:11:11')",
-                    "'\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00'"
+                    "str(\"\\x00\" * (60 - 42))"
                 ],
                 "egress":[
                     "ethernet(dst='22:22:22:22:22:22', src='12:11:11:11:11:11', ethertype=2054)",
                     "arp(dst_ip='192.168.20.20',dst_mac='22:22:22:22:22:22', opcode=1, src_ip='192.168.10.10',src_mac='12:11:11:11:11:11')",
-                    "'\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00'"
+                    "str(\"\\x00\" * (60 - 42))"
                 ]
             }
         ]
@@ -792,12 +792,12 @@
                     "itag(sid=100)",
                     "ethernet(dst='22:22:22:22:22:22', src='12:11:11:11:11:11', ethertype=2054)",
                     "arp(dst_ip='192.168.20.20',dst_mac='22:22:22:22:22:22', opcode=1, src_ip='192.168.10.10',src_mac='12:11:11:11:11:11')",
-                    "'\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00'"
+                    "str(\"\\x00\" * (60 - 42))"
                 ],
                 "PACKET_IN":[
                     "ethernet(dst='22:22:22:22:22:22', src='12:11:11:11:11:11', ethertype=2054)",
                     "arp(dst_ip='192.168.20.20',dst_mac='22:22:22:22:22:22', opcode=1, src_ip='192.168.10.10',src_mac='12:11:11:11:11:11')",
-                    "'\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00'"
+                    "str(\"\\x00\" * (60 - 42))"
                 ]
             }
         ]
@@ -884,7 +884,7 @@
                     "itag(sid=203)",
                     "ethernet(dst='ba:bb:bb:bb:bb:bb', src='aa:aa:aa:aa:aa:aa', ethertype=2054)",
                     "arp(dst_ip='10.10.20.20',dst_mac='ba:bb:bb:bb:bb:bb', opcode=2, src_ip='10.10.10.10',src_mac='aa:aa:aa:aa:aa:aa')",
-                    "'\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00'"
+                    "str(\"\\x00\" * (60 - 42))"
                 ],
                 "table-miss":[
                     1
diff --git a/ryu/tests/switch/of13/match/25_ARP_THA_Mask.json b/ryu/tests/switch/of13/match/25_ARP_THA_Mask.json
index cd00bd68..c600c781 100644
--- a/ryu/tests/switch/of13/match/25_ARP_THA_Mask.json
+++ b/ryu/tests/switch/of13/match/25_ARP_THA_Mask.json
@@ -47,12 +47,12 @@
                 "ingress":[
                     "ethernet(dst='22:22:22:22:22:22', src='12:11:11:11:11:11', ethertype=2054)",
                     "arp(dst_ip='192.168.20.20',dst_mac='22:22:22:22:22:22', opcode=1, src_ip='192.168.10.10',src_mac='12:11:11:11:11:11')",
-                    "'\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00'"
+                    "str(\"\\x00\" * (60 - 42))"
                 ],
                 "egress":[
                     "ethernet(dst='22:22:22:22:22:22', src='12:11:11:11:11:11', ethertype=2054)",
                     "arp(dst_ip='192.168.20.20',dst_mac='22:22:22:22:22:22', opcode=1, src_ip='192.168.10.10',src_mac='12:11:11:11:11:11')",
-                    "'\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00'"
+                    "str(\"\\x00\" * (60 - 42))"
                 ]
             }
         ]
@@ -105,12 +105,12 @@
                 "ingress":[
                     "ethernet(dst='22:22:22:22:22:22', src='12:11:11:11:11:11', ethertype=2054)",
                     "arp(dst_ip='192.168.20.20',dst_mac='22:22:22:22:22:22', opcode=1, src_ip='192.168.10.10',src_mac='12:11:11:11:11:11')",
-                    "'\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00'"
+                    "str(\"\\x00\" * (60 - 42))"
                 ],
                 "PACKET_IN":[
                     "ethernet(dst='22:22:22:22:22:22', src='12:11:11:11:11:11', ethertype=2054)",
                     "arp(dst_ip='192.168.20.20',dst_mac='22:22:22:22:22:22', opcode=1, src_ip='192.168.10.10',src_mac='12:11:11:11:11:11')",
-                    "'\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00'"
+                    "str(\"\\x00\" * (60 - 42))"
                 ]
             }
         ]
@@ -162,7 +162,7 @@
                 "ingress":[
                     "ethernet(dst='ba:bb:bb:bb:bb:bb', src='aa:aa:aa:aa:aa:aa', ethertype=2054)",
                     "arp(dst_ip='10.10.20.20',dst_mac='ba:bb:bb:bb:bb:bb', opcode=2, src_ip='10.10.10.10',src_mac='aa:aa:aa:aa:aa:aa')",
-                    "'\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00'"
+                    "str(\"\\x00\" * (60 - 42))"
                 ],
                 "table-miss":[
                     0
@@ -429,12 +429,12 @@
                     "ethernet(dst='22:22:22:22:22:22', src='12:11:11:11:11:11', ethertype=34887)",
                     "mpls(bsb=1, label=100, exp=3, ttl=64)",
                     "arp(dst_ip='192.168.20.20',dst_mac='22:22:22:22:22:22', opcode=1, src_ip='192.168.10.10',src_mac='12:11:11:11:11:11')",
-                    "'\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00'"
+                    "str(\"\\x00\" * (60 - 42))"
                 ],
                 "egress":[
                     "ethernet(dst='22:22:22:22:22:22', src='12:11:11:11:11:11', ethertype=2054)",
                     "arp(dst_ip='192.168.20.20',dst_mac='22:22:22:22:22:22', opcode=1, src_ip='192.168.10.10',src_mac='12:11:11:11:11:11')",
-                    "'\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00'"
+                    "str(\"\\x00\" * (60 - 42))"
                 ]
             }
         ]
@@ -524,12 +524,12 @@
                     "ethernet(dst='22:22:22:22:22:22', src='12:11:11:11:11:11', ethertype=34887)",
                     "mpls(bsb=1, label=100, exp=3, ttl=64)",
                     "arp(dst_ip='192.168.20.20',dst_mac='22:22:22:22:22:22', opcode=1, src_ip='192.168.10.10',src_mac='12:11:11:11:11:11')",
-                    "'\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00'"
+                    "str(\"\\x00\" * (60 - 42))"
                 ],
                 "PACKET_IN":[
                     "ethernet(dst='22:22:22:22:22:22', src='12:11:11:11:11:11', ethertype=2054)",
                     "arp(dst_ip='192.168.20.20',dst_mac='22:22:22:22:22:22', opcode=1, src_ip='192.168.10.10',src_mac='12:11:11:11:11:11')",
-                    "'\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00'"
+                    "str(\"\\x00\" * (60 - 42))"
                 ]
             }
         ]
@@ -618,7 +618,7 @@
                     "ethernet(dst='ba:bb:bb:bb:bb:bb', src='aa:aa:aa:aa:aa:aa', ethertype=34887)",
                     "mpls(bsb=1, label=203, exp=5, ttl=127)",
                     "arp(dst_ip='10.10.20.20',dst_mac='ba:bb:bb:bb:bb:bb', opcode=2, src_ip='10.10.10.10',src_mac='aa:aa:aa:aa:aa:aa')",
-                    "'\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00'"
+                    "str(\"\\x00\" * (60 - 42))"
                 ],
                 "table-miss":[
                     1
@@ -709,12 +709,12 @@
                     "itag(sid=100)",
                     "ethernet(dst='22:22:22:22:22:22', src='12:11:11:11:11:11', ethertype=2054)",
                     "arp(dst_ip='192.168.20.20',dst_mac='22:22:22:22:22:22', opcode=1, src_ip='192.168.10.10',src_mac='12:11:11:11:11:11')",
-                    "'\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00'"
+                    "str(\"\\x00\" * (60 - 42))"
                 ],
                 "egress":[
                     "ethernet(dst='22:22:22:22:22:22', src='12:11:11:11:11:11', ethertype=2054)",
                     "arp(dst_ip='192.168.20.20',dst_mac='22:22:22:22:22:22', opcode=1, src_ip='192.168.10.10',src_mac='12:11:11:11:11:11')",
-                    "'\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00'"
+                    "str(\"\\x00\" * (60 - 42))"
                 ]
             }
         ]
@@ -803,12 +803,12 @@
                     "itag(sid=100)",
                     "ethernet(dst='22:22:22:22:22:22', src='12:11:11:11:11:11', ethertype=2054)",
                     "arp(dst_ip='192.168.20.20',dst_mac='22:22:22:22:22:22', opcode=1, src_ip='192.168.10.10',src_mac='12:11:11:11:11:11')",
-                    "'\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00'"
+                    "str(\"\\x00\" * (60 - 42))"
                 ],
                 "PACKET_IN":[
                     "ethernet(dst='22:22:22:22:22:22', src='12:11:11:11:11:11', ethertype=2054)",
                     "arp(dst_ip='192.168.20.20',dst_mac='22:22:22:22:22:22', opcode=1, src_ip='192.168.10.10',src_mac='12:11:11:11:11:11')",
-                    "'\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00'"
+                    "str(\"\\x00\" * (60 - 42))"
                 ]
             }
         ]
@@ -896,7 +896,7 @@
                     "itag(sid=203)",
                     "ethernet(dst='ba:bb:bb:bb:bb:bb', src='aa:aa:aa:aa:aa:aa', ethertype=2054)",
                     "arp(dst_ip='10.10.20.20',dst_mac='ba:bb:bb:bb:bb:bb', opcode=2, src_ip='10.10.10.10',src_mac='aa:aa:aa:aa:aa:aa')",
-                    "'\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00'"
+                    "str(\"\\x00\" * (60 - 42))"
                 ],
                 "table-miss":[
                     1
diff --git a/ryu/tests/switch/of13/match/38_TUNNEL_ID.json b/ryu/tests/switch/of13/match/38_TUNNEL_ID.json
index 42b16f9c..1460a300 100644
--- a/ryu/tests/switch/of13/match/38_TUNNEL_ID.json
+++ b/ryu/tests/switch/of13/match/38_TUNNEL_ID.json
@@ -635,12 +635,12 @@
                 "ingress":[
                     "ethernet(dst='22:22:22:22:22:22', src='12:11:11:11:11:11', ethertype=2054)",
                     "arp(dst_ip='192.168.20.20',dst_mac='22:22:22:22:22:22', opcode=1, src_ip='192.168.10.10',src_mac='12:11:11:11:11:11')",
-                    "'\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00'"
+                    "str(\"\\x00\" * (60 - 42))"
                 ],
                 "egress":[
                     "ethernet(dst='22:22:22:22:22:22', src='12:11:11:11:11:11', ethertype=2054)",
                     "arp(dst_ip='192.168.20.20',dst_mac='22:22:22:22:22:22', opcode=1, src_ip='192.168.10.10',src_mac='12:11:11:11:11:11')",
-                    "'\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00'"
+                    "str(\"\\x00\" * (60 - 42))"
                 ]
             }
         ]
@@ -727,12 +727,12 @@
                 "ingress":[
                     "ethernet(dst='22:22:22:22:22:22', src='12:11:11:11:11:11', ethertype=2054)",
                     "arp(dst_ip='192.168.20.20',dst_mac='22:22:22:22:22:22', opcode=1, src_ip='192.168.10.10',src_mac='12:11:11:11:11:11')",
-                    "'\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00'"
+                    "str(\"\\x00\" * (60 - 42))"
                 ],
                 "PACKET_IN":[
                     "ethernet(dst='22:22:22:22:22:22', src='12:11:11:11:11:11', ethertype=2054)",
                     "arp(dst_ip='192.168.20.20',dst_mac='22:22:22:22:22:22', opcode=1, src_ip='192.168.10.10',src_mac='12:11:11:11:11:11')",
-                    "'\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00'"
+                    "str(\"\\x00\" * (60 - 42))"
                 ]
             }
         ]
@@ -818,7 +818,7 @@
                 "ingress":[
                     "ethernet(dst='22:22:22:22:22:22', src='12:11:11:11:11:11', ethertype=2054)",
                     "arp(dst_ip='192.168.20.20',dst_mac='22:22:22:22:22:22', opcode=1, src_ip='192.168.10.10',src_mac='12:11:11:11:11:11')",
-                    "'\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00'"
+                    "str(\"\\x00\" * (60 - 42))"
                 ],
                 "table-miss":[
                     1
diff --git a/ryu/tests/switch/of13/match/38_TUNNEL_ID_Mask.json b/ryu/tests/switch/of13/match/38_TUNNEL_ID_Mask.json
index d5538d81..161be1b7 100644
--- a/ryu/tests/switch/of13/match/38_TUNNEL_ID_Mask.json
+++ b/ryu/tests/switch/of13/match/38_TUNNEL_ID_Mask.json
@@ -642,12 +642,12 @@
                 "ingress":[
                     "ethernet(dst='22:22:22:22:22:22', src='12:11:11:11:11:11', ethertype=2054)",
                     "arp(dst_ip='192.168.20.20',dst_mac='22:22:22:22:22:22', opcode=1, src_ip='192.168.10.10',src_mac='12:11:11:11:11:11')",
-                    "'\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00'"
+                    "str(\"\\x00\" * (60 - 42))"
                 ],
                 "egress":[
                     "ethernet(dst='22:22:22:22:22:22', src='12:11:11:11:11:11', ethertype=2054)",
                     "arp(dst_ip='192.168.20.20',dst_mac='22:22:22:22:22:22', opcode=1, src_ip='192.168.10.10',src_mac='12:11:11:11:11:11')",
-                    "'\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00'"
+                    "str(\"\\x00\" * (60 - 42))"
                 ]
             }
         ]
@@ -735,12 +735,12 @@
                 "ingress":[
                     "ethernet(dst='22:22:22:22:22:22', src='12:11:11:11:11:11', ethertype=2054)",
                     "arp(dst_ip='192.168.20.20',dst_mac='22:22:22:22:22:22', opcode=1, src_ip='192.168.10.10',src_mac='12:11:11:11:11:11')",
-                    "'\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00'"
+                    "str(\"\\x00\" * (60 - 42))"
                 ],
                 "PACKET_IN":[
                     "ethernet(dst='22:22:22:22:22:22', src='12:11:11:11:11:11', ethertype=2054)",
                     "arp(dst_ip='192.168.20.20',dst_mac='22:22:22:22:22:22', opcode=1, src_ip='192.168.10.10',src_mac='12:11:11:11:11:11')",
-                    "'\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00'"
+                    "str(\"\\x00\" * (60 - 42))"
                 ]
             }
         ]
@@ -827,7 +827,7 @@
                 "ingress":[
                     "ethernet(dst='22:22:22:22:22:22', src='12:11:11:11:11:11', ethertype=2054)",
                     "arp(dst_ip='192.168.20.20',dst_mac='22:22:22:22:22:22', opcode=1, src_ip='192.168.10.10',src_mac='12:11:11:11:11:11')",
-                    "'\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00'"
+                    "str(\"\\x00\" * (60 - 42))"
                 ],
                 "table-miss":[
                     1
author	Yuichi Ito <ito.yuichi0@gmail.com>	2014-04-25 18:44:59 +0900
committer	FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp>	2014-04-25 18:49:44 +0900
commit	56528cfd002ac33ec8680b4a34ddb20719c1d3ec (patch)
tree	c4c9d086c8e7cbe14c9b8f763bab3ac8476e5946
parent	8ac3968af4d3e4710495edf004366393f04d8c0f (diff)