65 lines
1.8 KiB
Diff
65 lines
1.8 KiB
Diff
|
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 +1,58 @@
|
||
|
+# http://trac.secdev.org/scapy/ticket/31
|
||
|
+
|
||
|
+# scapy.contrib.description = BIER
|
||
|
+# 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
|
||
|
+ BIER_LEN_512 = 3
|
||
|
+ BIER_LEN_1024 = 4
|
||
|
+
|
||
|
+
|
||
|
+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),
|
||
|
+ BitFieldLenField("length", BIERLength.BIER_LEN_256, 4,
|
||
|
+ length_of=lambda x:(x.BitString >> 8)),
|
||
|
+ BitField("entropy", 0, 20),
|
||
|
+ BitField("OAM", 0, 2),
|
||
|
+ BitField("RSV", 0, 2),
|
||
|
+ BitField("DSCP", 0, 6),
|
||
|
+ BitEnumField("Proto", 2, 6, BIERnhcls),
|
||
|
+ ShortField("BFRID", 0),
|
||
|
+ StrLenField("BitString",
|
||
|
+ "",
|
||
|
+ length_from=lambda x:(8 << x.length))]
|
||
|
+
|
||
|
+
|
||
|
+bind_layers(BIER, IP, Proto=4)
|
||
|
+bind_layers(BIER, IPv6, Proto=5)
|
||
|
+bind_layers(UDP, BIFT, dport=8138)
|