# limitations under the License.
"""Common IP utilities library."""
-from ipaddress import IPv4Network
+
+from ipaddress import IPv4Network, ip_address
from resources.libraries.python.ssh import SSH
from resources.libraries.python.constants import Constants
-
+from resources.libraries.python.ssh import exec_cmd_no_error, exec_cmd
from resources.libraries.python.topology import Topology
+
class IPUtil(object):
"""Common IP utilities"""
elif if_type == "name":
iface_name = interface
else:
- raise ValueError("if_type unknown: {}".format(if_type))
+ raise ValueError("if_type unknown: {0}".format(if_type))
cmd = "{c}".format(c=Constants.VAT_BIN_NAME)
cmd_input = 'exec ip probe {dev} {ip}'.format(dev=iface_name, ip=addr)
raise Exception('VPP ip probe {dev} {ip} failed on {h}'.format(
dev=iface_name, ip=addr, h=node['host']))
+ @staticmethod
+ def ip_addresses_should_be_equal(ip1, ip2):
+ """Fails if the given IP addresses are unequal.
+
+ :param ip1: IPv4 or IPv6 address.
+ :param ip2: IPv4 or IPv6 address.
+ :type ip1: str
+ :type ip2: str
+ """
+
+ addr1 = ip_address(unicode(ip1))
+ addr2 = ip_address(unicode(ip2))
+
+ if addr1 != addr2:
+ raise AssertionError('IP addresses are not equal: {0} != {1}'.
+ format(ip1, ip2))
+
+ @staticmethod
+ def setup_network_namespace(node, namespace_name, interface_name,
+ ip_addr, prefix):
+ """Setup namespace on given node and attach interface and IP to
+ this namespace. Applicable also on TG node.
+
+ :param node: Node to set namespace on.
+ :param namespace_name: Namespace name.
+ :param interface_name: Interface name.
+ :param ip_addr: IP address of namespace's interface.
+ :param prefix: IP address prefix length.
+ :type node: dict
+ :type namespace_name: str
+ :type vhost_if: str
+ :type ip_addr: str
+ :type prefix: int
+ """
+ cmd = ('ip netns add {0}'.format(namespace_name))
+ exec_cmd_no_error(node, cmd, sudo=True)
+
+ cmd = ('ip link set dev {0} up netns {1}'.format(interface_name,
+ namespace_name))
+ exec_cmd_no_error(node, cmd, sudo=True)
+
+ cmd = ('ip netns exec {0} ip addr add {1}/{2} dev {3}'.format(
+ namespace_name, ip_addr, prefix, interface_name))
+ exec_cmd_no_error(node, cmd, sudo=True)
+
+ @staticmethod
+ def linux_enable_forwarding(node, ip_ver='ipv4'):
+ """Enable forwarding on a Linux node, e.g. VM.
+
+ :param node: Node to enable forwarding on.
+ :param ip_ver: IP version, 'ipv4' or 'ipv6'.
+ :type node: dict
+ :type ip_ver: str
+ """
+ cmd = 'sysctl -w net.{0}.ip_forward=1'.format(ip_ver)
+ exec_cmd_no_error(node, cmd, sudo=True)
+
+ @staticmethod
+ def set_linux_interface_ip(node, interface, ip_addr, prefix,
+ namespace=None):
+ """Set IP address to interface in linux.
+
+ :param node: Node where to execute command.
+ :param interface: Interface in namespace.
+ :param ip_addr: IP to be set on interface.
+ :param prefix: IP prefix.
+ :param namespace: Execute command in namespace. Optional
+ :type node: dict
+ :type interface: str
+ :type ip_addr: str
+ :type prefix: int
+ :type namespace: str
+ :raises RuntimeError: IP could not be set.
+ """
+ if namespace is not None:
+ cmd = 'ip netns exec {} ip addr add {}/{} dev {}'.format(
+ namespace, ip_addr, prefix, interface)
+ else:
+ cmd = 'ip addr add {}/{} dev {}'.format(ip_addr, prefix, interface)
+ (ret_code, _, stderr) = exec_cmd(node, cmd, timeout=5, sudo=True)
+ if ret_code != 0:
+ raise RuntimeError(
+ 'Could not set IP for interface, reason:{}'.format(stderr))
+
+ @staticmethod
+ def set_linux_interface_route(node, interface, route, namespace=None):
+ """Set route via interface in linux.
+
+ :param node: Node where to execute command.
+ :param interface: Interface in namespace.
+ :param route: Route to be added via interface.
+ :param namespace: Execute command in namespace. Optional parameter.
+ :type node: dict
+ :type interface: str
+ :type route: str
+ :type namespace: str
+ """
+ if namespace is not None:
+ cmd = 'ip netns exec {} ip route add {} dev {}'.format(
+ namespace, route, interface)
+ else:
+ cmd = 'ip route add {} dev {}'.format(route, interface)
+ exec_cmd_no_error(node, cmd, sudo=True)
+
def convert_ipv4_netmask_prefix(network):
"""Convert network mask to equivalent network prefix length or vice versa.
Example: mask 255.255.0.0 -> prefix length 16
:param network: Network mask or network prefix length.
:type network: str or int
- :return: Network mask or network prefix length.
+ :returns: Network mask or network prefix length.
:rtype: str or int
"""
temp_address = "0.0.0.0"