Branch stable code from before start of the event-driven rewrite.

svn path=/rpkid.stable; revision=2354

1 files changed, 103 insertions, 0 deletions

diff --git a/rpkid.stable/rpki/ipaddrs.py b/rpkid.stable/rpki/ipaddrs.py
new file mode 100644
index 00000000..db6a5891
--- /dev/null
+++ b/rpkid.stable/rpki/ipaddrs.py
@@ -0,0 +1,103 @@
+"""Classes to represent IP addresses.
+
+Given some of the other operations we need to perform on them, it's
+most convenient to represent IP addresses as Python "long" values.
+The classes in this module just wrap suitable read/write syntax around
+the underlying "long" type.
+
+These classes also supply a "bits" attribute for use by other code
+built on these classes; for the most part, IPv6 addresses really are
+just IPv4 addresses with more bits, so we supply the number of bits
+once, here, thus avoiding a lot of duplicate code elsewhere.
+
+$Id$
+
+
+Copyright (C) 2009  Internet Systems Consortium ("ISC")
+
+Permission to use, copy, modify, and distribute this software for any
+purpose with or without fee is hereby granted, provided that the above
+copyright notice and this permission notice appear in all copies.
+
+THE SOFTWARE IS PROVIDED "AS IS" AND ISC DISCLAIMS ALL WARRANTIES WITH
+REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
+AND FITNESS.  IN NO EVENT SHALL ISC BE LIABLE FOR ANY SPECIAL, DIRECT,
+INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM
+LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE
+OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
+PERFORMANCE OF THIS SOFTWARE.
+
+
+Portions copyright (C) 2007--2008  American Registry for Internet Numbers ("ARIN")
+
+Permission to use, copy, modify, and distribute this software for any
+purpose with or without fee is hereby granted, provided that the above
+copyright notice and this permission notice appear in all copies.
+
+THE SOFTWARE IS PROVIDED "AS IS" AND ARIN DISCLAIMS ALL WARRANTIES WITH
+REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
+AND FITNESS.  IN NO EVENT SHALL ARIN BE LIABLE FOR ANY SPECIAL, DIRECT,
+INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM
+LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE
+OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
+PERFORMANCE OF THIS SOFTWARE.
+"""
+
+import socket, struct
+
+class v4addr(long):
+  """IPv4 address.
+
+  Derived from long, but supports IPv4 print syntax.
+  """
+
+  bits = 32
+  
+  def __new__(cls, x):
+    """Construct a v4addr object."""
+    if isinstance(x, str):
+      return cls.from_bytes(socket.inet_pton(socket.AF_INET, ".".join(str(int(i)) for i in x.split("."))))
+    else:
+      return long.__new__(cls, x)
+
+  def to_bytes(self):
+    """Convert a v4addr object to a raw byte string."""
+    return struct.pack("!I", long(self))
+
+  @classmethod
+  def from_bytes(cls, x):
+    """Convert from a raw byte string to a v4addr object."""
+    return cls(struct.unpack("!I", x)[0])
+
+  def __str__(self):
+    """Convert a v4addr object to string format."""
+    return socket.inet_ntop(socket.AF_INET, self.to_bytes())
+
+class v6addr(long):
+  """IPv6 address.
+
+  Derived from long, but supports IPv6 print syntax.
+  """
+
+  bits = 128
+
+  def __new__(cls, x):
+    """Construct a v6addr object."""
+    if isinstance(x, str):
+      return cls.from_bytes(socket.inet_pton(socket.AF_INET6, x))
+    else:
+      return long.__new__(cls, x)
+
+  def to_bytes(self):
+    """Convert a v6addr object to a raw byte string."""
+    return struct.pack("!QQ", long(self) >> 64, long(self) & 0xFFFFFFFFFFFFFFFF)
+
+  @classmethod
+  def from_bytes(cls, x):
+    """Convert from a raw byte string to a v6addr object."""
+    x = struct.unpack("!QQ", x)
+    return cls((x[0] << 64) | x[1])
+
+  def __str__(self):
+    """Convert a v6addr object to string format."""
+    return socket.inet_ntop(socket.AF_INET6, self.to_bytes())