def GetIP(hostname, family=None):
"""Return IP address of given hostname.
Supports both IPv4 and IPv6.
@type hostname: str
@param hostname: hostname to look up
@type family: int
@param family: AF_INET | AF_INET6 | None
@rtype: str
@return: IP address
@raise errors.ResolverError: in case of errors in resolving
"""
try:
if family in (socket.AF_INET, socket.AF_INET6):
result = socket.getaddrinfo(hostname, None, family)
else:
result = socket.getaddrinfo(hostname, None)
except (socket.gaierror, socket.herror, socket.error) as err:
# hostname not found in DNS, or other socket exception in the
# (code, description format)
raise errors.ResolverError(hostname, err.args[0], err.args[1])
# getaddrinfo() returns a list of 5-tupes (family, socktype, proto,
# canonname, sockaddr). We return the first tuple's first address in
# sockaddr
try:
return result[0][4][0]
except IndexError as err:
# we don't have here an actual error code, it's just that the
# data type returned by getaddrinfo is not what we expected;
# let's keep the same format in the exception arguments with a
# dummy error code
raise errors.ResolverError(
hostname, 0, "Unknown error in getaddrinfo(): %s" % err)
def GetIP(hostname, family=None):
"""Return IP address of given hostname.
Supports both IPv4 and IPv6.
@type hostname: str
@param hostname: hostname to look up
@type family: int
@param family: AF_INET | AF_INET6 | None
@rtype: str
@return: IP address
@raise errors.ResolverError: in case of errors in resolving
"""
try:
if family in (socket.AF_INET, socket.AF_INET6):
result = socket.getaddrinfo(hostname, None, family)
else:
result = socket.getaddrinfo(hostname, None)
except (socket.gaierror, socket.herror, socket.error), err:
# hostname not found in DNS, or other socket exception in the
# (code, description format)
raise errors.ResolverError(hostname, err.args[0], err.args[1])
class Hostname(object):
"""Class implementing resolver and hostname functionality.
"""
_VALID_NAME_RE = re.compile("^[a-z0-9._-]{1,255}$")
def __init__(self, name=None, family=None):
"""Initialize the host name object.
If the name argument is None, it will use this system's name.
@type family: int
@param family: AF_INET | AF_INET6 | None
@type name: str
@param name: hostname or None
"""
self.name = self.GetFqdn(name)
self.ip = self.GetIP(self.name, family=family)
@classmethod
def GetSysName(cls):
"""Legacy method the get the current system's name.
"""
return cls.GetFqdn()
@classmethod
def GetFqdn(cls, hostname=None):
"""Return fqdn.
If hostname is None the system's fqdn is returned.
@type hostname: str
@param hostname: name to be fqdn'ed
@rtype: str
@return: fqdn of given name, if it exists, unmodified name otherwise
"""
if hostname is None:
virtfqdn = vcluster.GetVirtualHostname()
if virtfqdn:
result = virtfqdn
else:
result = socket.getfqdn()
else:
result = socket.getfqdn(hostname)
return cls.GetNormalizedName(result)
@staticmethod
def GetIP(hostname, family=None):
"""Return IP address of given hostname.
Supports both IPv4 and IPv6.
@type hostname: str
@param hostname: hostname to look up
@type family: int
@param family: AF_INET | AF_INET6 | None
@rtype: str
@return: IP address
@raise errors.ResolverError: in case of errors in resolving
"""
try:
if family in (socket.AF_INET, socket.AF_INET6):
result = socket.getaddrinfo(hostname, None, family)
else:
result = socket.getaddrinfo(hostname, None)
except (socket.gaierror, socket.herror, socket.error), err:
# hostname not found in DNS, or other socket exception in the
# (code, description format)
raise errors.ResolverError(hostname, err.args[0], err.args[1])
# getaddrinfo() returns a list of 5-tupes (family, socktype, proto,
# canonname, sockaddr). We return the first tuple's first address in
# sockaddr
try:
return result[0][4][0]
except IndexError, err:
# we don't have here an actual error code, it's just that the
# data type returned by getaddrinfo is not what we expected;
# let's keep the same format in the exception arguments with a
# dummy error code
raise errors.ResolverError(hostname, 0,
"Unknown error in getaddrinfo(): %s" % err)