X-Git-Url: https://gerrit.fd.io/r/gitweb?p=csit.git;a=blobdiff_plain;f=resources%2Flibraries%2Fpython%2FIPUtil.py;h=ed38272645140b45e958ed35e1e79f4880cdc030;hp=323c75bda47d0af43963c3f70100e4d9abbb774c;hb=c75b9804c9510d0a342563e41407089145b38d50;hpb=cbd47fbe97945e9dc6584d08cd2266e3a7536a68

diff --git a/resources/libraries/python/IPUtil.py b/resources/libraries/python/IPUtil.py
index 323c75bda4..ed38272645 100644
--- a/resources/libraries/python/IPUtil.py
+++ b/resources/libraries/python/IPUtil.py
@@ -12,13 +12,15 @@
 # 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"""
 
@@ -45,7 +47,7 @@ class IPUtil(object):
         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)
@@ -54,6 +56,89 @@ class IPUtil(object):
             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_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.