test/patches/scapy-2.3.3/bier.patch

diff --git a/scapy/contrib/bier.py b/scapy/contrib/bier.py
new file mode 100644
index 0000000..e173cdb
--- /dev/null
+++ b/scapy/contrib/bier.py
@@ -0,0 +1,53 @@
+# http://trac.secdev.org/scapy/ticket/31
+
+# scapy.contrib.description = MPLS
+# scapy.contrib.status = loads
+
+from scapy.packet import *
+from scapy.fields import *
+from scapy.layers.inet import IP, UDP
+from scapy.layers.inet6 import IPv6
+
+class BIERLength:
+   BIER_LEN_64 = 0
+   BIER_LEN_128 = 1
+   BIER_LEN_256 = 2
+
+
+BIERnhcls = {  1: "MPLS",
+               2: "MPLS",
+               4: "IPv4",
+               5: "IPv6" }
+
+
+class BIFT(Packet):
+   name = "BIFT"
+   fields_desc =  [ BitField("bsl", 0, 4),
+                    BitField("sd", 0, 8),
+                    BitField("set", 0, 8),
+                    BitField("cos", 0, 3),
+                    BitField("s", 1, 1),
+                    ByteField("ttl", 0)  ]
+
+   def guess_payload_class(self, payload):
+      return BIER
+
+
+class BIER(Packet):
+   name = "BIER"
+   fields_desc =  [ BitField("id", 5, 4),
+                    BitField("version", 0, 4),
+                    BitField("length", 0, 4),
+                    BitField("entropy", 0, 20),
+                    BitField("OAM", 0, 2),
+                    BitField("RSV", 0, 2),
+                    BitField("DSCP", 0, 6),
+                    BitEnumField("Proto", 2, 6, BIERnhcls),
+                    ShortField("BFRID", 0),
+                    StrFixedLenField("BitString",
+                                     chr(255)*32, 32) ]
+
+
+bind_layers(BIER, IP,   Proto=4)
+bind_layers(BIER, IPv6, Proto=5)
+bind_layers(UDP, BIFT, dport=8138)