X-Git-Url: http://xvm.mit.edu/gitweb/invirt/packages/invirt-dhcp.git/blobdiff_plain/5b5216809d7e7d0e78df31d274c2e97eb77be2c2..9007b014f45be76bf183371353068bab12b749f6:/code/pydhcplib/pydhcplib/type_ipv4.py

diff --git a/code/pydhcplib/pydhcplib/type_ipv4.py b/code/pydhcplib/pydhcplib/type_ipv4.py
new file mode 100644
index 0000000..f42dec0
--- /dev/null
+++ b/code/pydhcplib/pydhcplib/type_ipv4.py
@@ -0,0 +1,117 @@
+# Anemon Dhcp
+# Copyright (C) 2005 Mathieu Ignacio -- mignacio@april.org
+#
+# This program is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation; either version 2 of the License, or
+# (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program; if not, write to the Free Software
+# Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301, USA
+
+
+# Check and convert ipv4 address type
+class ipv4:
+    def __init__(self,value="0.0.0.0") :
+        ip_type = type(value)
+        if ip_type == str :
+            if not self.CheckString(value) : raise ValueError, "ipv4 string argument is not an valid ip "
+            self._ip_string = value
+            self._StringToNumlist()
+            self._StringToLong()
+            self._NumlistToString()
+        elif ip_type == list :
+            if not self.CheckNumList(value) : raise ValueError, "ipv4 list argument is not an valid ip "
+            self._ip_numlist = value
+            self._NumlistToString()
+            self._StringToLong()
+        elif ip_type == int or ip_type == long:
+            self._ip_long = value
+            self._LongToNumlist()
+            self._NumlistToString()
+        elif ip_type == bool :
+            self._ip_long = 0
+            self._LongToNumlist()
+            self._NumlistToString()
+            
+        else : raise TypeError , 'ipv4 init : Valid types are  str, list, int or long'
+
+
+
+    # Convert Long type ip to numlist ip
+    def _LongToNumlist(self) :
+        self._ip_numlist = [self._ip_long >> 24 & 0xFF]
+        self._ip_numlist.append(self._ip_long >> 16 & 0xFF)
+        self._ip_numlist.append(self._ip_long >> 8 & 0xFF)
+        self._ip_numlist.append(self._ip_long & 0xFF)
+        if not self.CheckNumList(self._ip_numlist) : raise ValueError, "ipv4 list argument is not an valid ip "
+    # Convert String type ip to Long type ip
+    def _StringToLong(self) :
+        ip_numlist = map(int,self._ip_string.split('.'))
+        self._ip_long = ip_numlist[3] + ip_numlist[2]*256 + ip_numlist[1]*256*256 + ip_numlist[0]*256*256*256
+        if not self.CheckNumList(self._ip_numlist) : raise ValueError, "ipv4 list argument is not an valid ip "
+    # Convert NumList type ip to String type ip
+    def _NumlistToString(self) :
+        self._ip_string = ".".join(map(str,self._ip_numlist))
+        if not self.CheckNumList(self._ip_numlist) : raise ValueError, "ipv4 list argument is not an valid ip "
+    # Convert String type ip to NumList type ip
+    def _StringToNumlist(self) :
+        self._ip_numlist = map(int,self._ip_string.split('.'))
+        if not self.CheckNumList(self._ip_numlist) : raise ValueError, "ipv4 list argument is not an valid ip "
+
+    """ Public methods """
+    # Check if _ip_numlist is valid and raise error if not.
+    # self._ip_numlist
+    def CheckNumList(self,value) :
+        if len(value) != 4 : return False
+        for part in value :
+            if part < 0 or part > 255 : return False
+        return True
+
+    # Check if _ip_numlist is valid and raise error if not.
+    def CheckString(self,value) :
+        tmp = value.split('.')
+        if len(tmp) != 4 :  return False
+        for each in tmp : 
+            if not each.isdigit() : return False
+        return True
+    
+    # return ip string
+    def str(self) :
+        return self._ip_string
+    __str__=str
+
+    # return ip list (useful for DhcpPacket class)
+    def list(self) :
+        return self._ip_numlist
+
+    # return Long ip type (useful for SQL ip address backend)
+    def int(self) :
+        return self._ip_long
+
+
+
+
+    """ Useful function for native python operations """
+
+    def __hash__(self) :
+        return self._ip_long.__hash__()
+
+    def __repr__(self) :
+        return self._ip_string
+
+    def __cmp__(self,other) :
+        return cmp(self._ip_long, other._ip_long);
+
+    def __nonzero__(self) :
+        if self._ip_long != 0 : return 1
+        return 0
+
+
+