1 files changed, 67 insertions, 1 deletions
diff --git a/resources/libraries/python/IPUtil.py b/resources/libraries/python/IPUtil.py
index 5011708c39..ed38272645 100644
--- a/resources/libraries/python/IPUtil.py
+++ b/resources/libraries/python/IPUtil.py
@@ -17,7 +17,7 @@ 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
 
 
@@ -73,6 +73,72 @@ class IPUtil(object):
             raise AssertionError('IP addresses are not equal: {0} != {1}'.
                                  format(ip1, ip2))
 
+    @staticmethod
+    def setup_network_namespace(node, namespace_name, interface_name,
+                                ip_address, 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_address: 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_address: 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_address, 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, prefix, namespace=None):
+        """Set IP address to interface in linux.
+
+        :param node: Node where to execute command.
+        :param interface: Interface in namespace.
+        :param ip: 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: 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, prefix, interface)
+        else:
+            cmd = 'ip addr add {}/{} dev {}'.format(ip, prefix, interface)
+        (rc, _, stderr) = exec_cmd(node, cmd, timeout=5, sudo=True)
+        if rc != 0:
+            raise RuntimeError(
+                'Could not set IP for interface, reason:{}'.format(stderr))
+
 
 def convert_ipv4_netmask_prefix(network):
     """Convert network mask to equivalent network prefix length or vice versa.