def str_to_int(addr, flags=0):
"""
:param addr: An IPv4 dotted decimal address in string form.
:param flags: decides which rules are applied to the interpretation of the
addr value. Supported constants are INET_PTON and ZEROFILL. See the
netaddr.core docs for details.
:return: The equivalent unsigned integer for a given IPv4 address.
"""
if flags & ZEROFILL:
addr = '.'.join(['%d' % int(i) for i in addr.split('.')])
try:
if flags & INET_PTON:
return _struct.unpack('>I', _inet_pton(AF_INET, addr))[0]
else:
return _struct.unpack('>I', _inet_aton(addr))[0]
except:
raise AddrFormatError('%r is not a valid IPv4 address string!' % addr)
def expand_partial_address(addr):
"""
Expands a partial IPv4 address into a full 4-octet version.
:param addr: an partial or abbreviated IPv4 address
:return: an expanded IP address in presentation format (x.x.x.x)
"""
tokens = []
error = AddrFormatError('invalid partial IPv4 address: %r!' % addr)
if isinstance(addr, _str_type):
if ':' in addr:
# Ignore IPv6 ...
raise error
try:
if '.' in addr:
tokens = ['%d' % int(o) for o in addr.split('.')]
else:
tokens = ['%d' % int(addr)]
except ValueError:
raise error
if 1 <= len(tokens) <= 4:
for i in range(4 - len(tokens)):
tokens.append('0')
else:
raise error
if not tokens:
raise error
return '%s.%s.%s.%s' % tuple(tokens)
