X-Git-Url: https://gerrit.fd.io/r/gitweb?p=csit.git;a=blobdiff_plain;f=resources%2Flibraries%2Fpython%2FIPUtil.py;h=d2f2adcf286479b2ed29fd29c22dc3f7025a721c;hp=5011708c3996a03d9a5010384d0ea116b6bcf1c1;hb=6e25bb5e8b8bcc2a1f741892508a68aec7d791b9;hpb=517ee7fd3eb28ecf030c5d50be09fcdabe508922

diff --git a/resources/libraries/python/IPUtil.py b/resources/libraries/python/IPUtil.py
index 5011708c39..d2f2adcf28 100644
--- a/resources/libraries/python/IPUtil.py
+++ b/resources/libraries/python/IPUtil.py
@@ -17,13 +17,37 @@ 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"""
 
+    @staticmethod
+    def ip_to_int(ip_str):
+        """Convert IP address from string format (e.g. 10.0.0.1) to integer
+        representation (167772161).
+
+        :param ip_str: IP address in string representation.
+        :type ip_str: str
+        :returns: Integer representation of IP address.
+        :rtype: int
+        """
+        return int(ip_address(unicode(ip_str)))
+
+    @staticmethod
+    def int_to_ip(ip_int):
+        """Convert IP address from integer representation (e.g. 167772161) to
+        string format (10.0.0.1).
+
+        :param ip_int: IP address in integer representation.
+        :type ip_int: int
+        :returns: String representation of IP address.
+        :rtype: str
+        """
+        return str(ip_address(ip_int))
+
     @staticmethod
     def vpp_ip_probe(node, interface, addr, if_type="key"):
         """Run ip probe on VPP node.
@@ -73,6 +97,93 @@ 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_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.
@@ -80,7 +191,7 @@ def convert_ipv4_netmask_prefix(network):
     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"