1 files changed, 89 insertions, 0 deletions
diff --git a/scripts/external_libs/scapy-2.3.1/python2/scapy/pton_ntop.py b/scripts/external_libs/scapy-2.3.1/python2/scapy/pton_ntop.py
new file mode 100644
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+++ b/scripts/external_libs/scapy-2.3.1/python2/scapy/pton_ntop.py
@@ -0,0 +1,89 @@
+## This file is part of Scapy
+## See http://www.secdev.org/projects/scapy for more informations
+## Copyright (C) Philippe Biondi <phil@secdev.org>
+## This program is published under a GPLv2 license
+
+"""
+Convert IPv6 addresses between textual representation and binary.
+
+These functions are missing when python is compiled
+without IPv6 support, on Windows for instance.
+"""
+
+import socket,struct
+
+def inet_pton(af, addr):
+    """Convert an IP address from text representation into binary form"""
+    if af == socket.AF_INET:
+        return inet_aton(addr)
+    elif af == socket.AF_INET6:
+        # IPv6: The use of "::" indicates one or more groups of 16 bits of zeros.
+        # We deal with this form of wildcard using a special marker. 
+        JOKER = "*"
+        while "::" in addr:
+            addr = addr.replace("::", ":" + JOKER + ":")
+        joker_pos = None 
+        
+        # The last part of an IPv6 address can be an IPv4 address
+        ipv4_addr = None
+        if "." in addr:
+            ipv4_addr = addr.split(":")[-1]
+           
+        result = ""
+        parts = addr.split(":")
+        for part in parts:
+            if part == JOKER:
+                # Wildcard is only allowed once
+                if joker_pos is None:
+                   joker_pos = len(result)
+                else:
+                   raise Exception("Illegal syntax for IP address")
+            elif part == ipv4_addr: # FIXME: Make sure IPv4 can only be last part
+                # FIXME: inet_aton allows IPv4 addresses with less than 4 octets 
+                result += socket.inet_aton(ipv4_addr)
+            else:
+                # Each part must be 16bit. Add missing zeroes before decoding. 
+                try:
+                    result += part.rjust(4, "0").decode("hex")
+                except TypeError:
+                    raise Exception("Illegal syntax for IP address")
+                    
+        # If there's a wildcard, fill up with zeros to reach 128bit (16 bytes) 
+        if JOKER in addr:
+            result = (result[:joker_pos] + "\x00" * (16 - len(result))
+                      + result[joker_pos:])
+    
+        if len(result) != 16:
+            raise Exception("Illegal syntax for IP address")
+        return result 
+    else:
+        raise Exception("Address family not supported")
+
+
+def inet_ntop(af, addr):
+    """Convert an IP address from binary form into text represenation"""
+    if af == socket.AF_INET:
+        return inet_ntoa(addr)
+    elif af == socket.AF_INET6:
+        # IPv6 addresses have 128bits (16 bytes)
+        if len(addr) != 16:
+            raise Exception("Illegal syntax for IP address")
+        parts = []
+        for left in [0, 2, 4, 6, 8, 10, 12, 14]:
+            try: 
+                value = struct.unpack("!H", addr[left:left+2])[0]
+                hexstr = hex(value)[2:]
+            except TypeError:
+                raise Exception("Illegal syntax for IP address")
+            parts.append(hexstr.lstrip("0").lower())
+        result = ":".join(parts)
+        while ":::" in result:
+            result = result.replace(":::", "::")
+        # Leaving out leading and trailing zeros is only allowed with ::
+        if result.endswith(":") and not result.endswith("::"):
+            result = result + "0"
+        if result.startswith(":") and not result.startswith("::"):
+            result = "0" + result
+        return result
+    else:
+        raise Exception("Address family not supported yet")