VAT-to-PAPI: NATUtil

Change-Id: Id64bbf899e78c7c55410a8ce608393c22fa596ab
Signed-off-by: Tibor Frank <tifrank@cisco.com>

2 files changed, 108 insertions, 200 deletions

diff --git a/resources/libraries/python/NATUtil.py b/resources/libraries/python/NATUtil.py
index e08a6daf82..aeeb3bc1a5 100644
--- a/resources/libraries/python/NATUtil.py
+++ b/resources/libraries/python/NATUtil.py
@@ -1,4 +1,4 @@
-# Copyright (c) 2018 Cisco and/or its affiliates.
+# Copyright (c) 2019 Cisco and/or its affiliates.
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.
 # You may obtain a copy of the License at:
@@ -13,7 +13,28 @@
 
 """NAT utilities library."""
 
-from resources.libraries.python.VatExecutor import VatTerminal, VatExecutor
+from pprint import pformat
+from socket import AF_INET, inet_pton
+
+from enum import IntEnum
+
+from robot.api import logger
+
+from resources.libraries.python.InterfaceUtil import InterfaceUtil
+from resources.libraries.python.PapiExecutor import PapiExecutor
+
+
+class NATConfigFlags(IntEnum):
+    """Common NAT plugin APIs"""
+    NAT_IS_NONE = 0x00
+    NAT_IS_TWICE_NAT = 0x01
+    NAT_IS_SELF_TWICE_NAT = 0x02
+    NAT_IS_OUT2IN_ONLY = 0x04
+    NAT_IS_ADDR_ONLY = 0x08
+    NAT_IS_OUTSIDE = 0x10
+    NAT_IS_INSIDE = 0x20
+    NAT_IS_STATIC = 0x40
+    NAT_IS_EXT_HOST_VALID = 0x80
 
 
 class NATUtil(object):
@@ -32,21 +53,33 @@ class NATUtil(object):
         :type node: dict
         :type int_in: str
         :type int_out: str
-        :returns: Response of the command.
-        :rtype: str
-        :raises RuntimeError: If setting of inside and outside interfaces for
-            NAT44 fails.
         """
 
-        try:
-            with VatTerminal(node, json_param=False) as vat:
-                response = vat.vat_terminal_exec_cmd_from_template(
-                    'nat/nat44_set_interfaces.vat',
-                    int_in=int_in, int_out=int_out)
-                return response
-        except:
-            raise RuntimeError("Setting of inside and outside interfaces for "
-                               "NAT failed!")
+        cmd = 'nat44_interface_add_del_feature'
+
+        int_in_idx = InterfaceUtil.get_sw_if_index(node, int_in)
+        err_msg = 'Failed to set inside interface {int} for NAT44 on host ' \
+                  '{host}'.format(int=int_in, host=node['host'])
+        args_in = dict(
+            sw_if_index=int_in_idx,
+            is_add=1,
+            flags=getattr(NATConfigFlags, "NAT_IS_INSIDE").value
+        )
+        with PapiExecutor(node) as papi_exec:
+            papi_exec.add(cmd, **args_in).get_replies(err_msg).\
+                verify_reply(err_msg=err_msg)
+
+        int_out_idx = InterfaceUtil.get_sw_if_index(node, int_out)
+        err_msg = 'Failed to set outside interface {int} for NAT44 on host ' \
+                  '{host}'.format(int=int_out, host=node['host'])
+        args_in = dict(
+            sw_if_index=int_out_idx,
+            is_add=1,
+            flags=getattr(NATConfigFlags, "NAT_IS_OUTSIDE").value
+        )
+        with PapiExecutor(node) as papi_exec:
+            papi_exec.add(cmd, **args_in).get_replies(err_msg). \
+                verify_reply(err_msg=err_msg)
 
     @staticmethod
     def set_nat44_deterministic(node, ip_in, subnet_in, ip_out, subnet_out):
@@ -62,200 +95,58 @@ class NATUtil(object):
         :type subnet_in: str or int
         :type ip_out: str
         :type subnet_out: str or int
-        :returns: Response of the command.
-        :rtype: str
-        :raises RuntimeError: If setting of deterministic behaviour of NAT44
-            fails.
         """
 
-        try:
-            with VatTerminal(node, json_param=False) as vat:
-                response = vat.vat_terminal_exec_cmd_from_template(
-                    'nat/nat44_set_deterministic.vat',
-                    ip_in=ip_in, subnet_in=subnet_in,
-                    ip_out=ip_out, subnet_out=subnet_out)
-                return response
-        except:
-            raise RuntimeError("Setting of deterministic behaviour of NAT "
-                               "failed!")
-
-    @staticmethod
-    def set_nat_workers(node, lcores):
-        """Set NAT workers.
-
-        :param node: DUT node.
-        :param lcores: List of cores, format: range e.g. 1-5 or list of ranges
-            e.g.: 1-5,18-22.
-        :type node: dict
-        :type lcores: str
-        :returns: Response of the command.
-        :rtype: str
-        :raises RuntimeError: If setting of NAT workers fails.
-        """
-
-        try:
-            with VatTerminal(node, json_param=False) as vat:
-                response = vat.vat_terminal_exec_cmd_from_template(
-                    'nat/nat_set_workers.vat', lcores=lcores)
-                return response
-        except:
-            raise RuntimeError("Setting of NAT workers failed!")
+        cmd = 'nat_det_add_del_map'
+        err_msg = 'Failed to set deterministic behaviour of NAT on host ' \
+                  '{host}'.format(host=node['host'])
+        args_in = dict(
+            is_add=True,
+            in_addr=inet_pton(AF_INET, str(ip_in)),
+            in_plen=int(subnet_in),
+            out_addr=inet_pton(AF_INET, str(ip_out)),
+            out_plen=int(subnet_out)
+        )
+        with PapiExecutor(node) as papi_exec:
+            papi_exec.add(cmd, **args_in).get_replies(err_msg). \
+                verify_reply(err_msg=err_msg)
 
     @staticmethod
     def show_nat(node):
-        """Show the NAT settings.
-
-        :param node: DUT node.
-        :type node: dict
-        :returns: Response of the command.
-        :rtype: str
-        :raises RuntimeError: If getting of NAT settings fails.
-        """
-
-        try:
-            with VatTerminal(node, json_param=False) as vat:
-                response = vat.vat_terminal_exec_cmd_from_template(
-                    'nat/nat_show_nat.vat')
-                return response
-        except:
-            raise RuntimeError("Getting of NAT settings failed!")
-
-    @staticmethod
-    def show_nat44_deterministic_forward(node, ip_addr):
-        """Show forward IP address and port(s).
-
-        :param node: DUT node.
-        :param ip_addr: IP address.
-        :type node: dict
-        :type ip_addr: str
-        :returns: Response of the command.
-        :rtype: str
-        :raises RuntimeError: If command 'exec snat deterministic forward'
-            fails.
-        """
+        """Show the NAT configuration and data.
 
-        try:
-            with VatTerminal(node, json_param=False) as vat:
-                response = vat.vat_terminal_exec_cmd_from_template(
-                    'nat/nat44_deterministic_forward.vat', ip=ip_addr)
-                return response
-        except:
-            raise RuntimeError("Command 'exec nat44 deterministic forward {ip}'"
-                               " failed!".format(ip=ip_addr))
+        Used data sources:
 
-    @staticmethod
-    def show_nat44_deterministic_reverse(node, ip_addr, port):
-        """Show reverse IP address.
+            nat_show_config
+            nat_worker_dump
+            nat44_interface_addr_dump
+            nat44_address_dump
+            nat44_static_mapping_dump
+            nat44_user_dump
+            nat44_interface_dump
+            nat44_user_session_dump
+            nat_det_map_dump
 
         :param node: DUT node.
-        :param ip_addr: IP address.
-        :param port: Port.
         :type node: dict
-        :type ip_addr: str
-        :type port: str or int
-        :returns: Response of the command.
-        :rtype: str
-        :raises RuntimeError: If command 'exec snat deterministic reverse'
-            fails.
         """
 
-        try:
-            with VatTerminal(node, json_param=False) as vat:
-                response = vat.vat_terminal_exec_cmd_from_template(
-                    'nat/nat44_deterministic_reverse.vat',
-                    ip=ip_addr, port=port)
-                return response
-        except:
-            raise RuntimeError(
-                "Command 'exec nat44 deterministic reverse {ip}:{port}'"
-                " failed!".format(ip=ip_addr, port=port))
-
-    @staticmethod
-    def get_nat_static_mappings(node):
-        """Get NAT static mappings from VPP node.
-
-        :param node: VPP node.
-        :type node: dict
-        :returns: List of static mappings.
-        :rtype: list
-        :raises RuntimeError: If the output is not as expected.
-        """
-
-        vat = VatExecutor()
-        # JSON output not supported for this command
-        vat.execute_script('nat/snat_mapping_dump.vat', node, json_out=False)
-
-        stdout = vat.get_script_stdout()
-        lines = stdout.split("\n")
-
-        data = []
-        # lines[0,1] are table and column headers
-        for line in lines[2::]:
-            # Ignore extra data after NAT table
-            if "snat_static_mapping_dump error: Misc" in line or "vat#" in line:
-                continue
-            items = line.split(" ")
-            while "" in items:
-                items.remove("")
-            if not items:
-                continue
-            if len(items) == 4:
-                # no ports were returned
-                data.append({
-                    "local_address": items[0],
-                    "remote_address": items[1],
-                    "vrf": items[2],
-                    "protocol": items[3]
-                })
-            elif len(items) == 6:
-                data.append({
-                    "local_address": items[0],
-                    "local_port": items[1],
-                    "remote_address": items[2],
-                    "remote_port": items[3],
-                    "vrf": items[4],
-                    "protocol": items[5]
-                })
-            else:
-                raise RuntimeError("Unexpected output from snat_mapping_dump.")
-
-        return data
-
-    @staticmethod
-    def get_nat_interfaces(node):
-        """Get list of interfaces configured with NAT from VPP node.
-
-        :param node: VPP node.
-        :type node: dict
-        :returns: List of interfaces on the node that are configured with NAT.
-        :rtype: list
-        :raises RuntimeError: If the output is not as expected.
-        """
-
-        vat = VatExecutor()
-        # JSON output not supported for this command
-        vat.execute_script('nat/snat_interface_dump.vat', node,
-                           json_out=False)
-
-        stdout = vat.get_script_stdout()
-        lines = stdout.split("\n")
-
-        data = []
-        for line in lines:
-            items = line.split(" ")
-            for trash in ("", "vat#"):
-                while trash in items:
-                    items.remove(trash)
-            if not items:
-                continue
-            if len(items) == 3:
-                data.append({
-                    # items[0] is the table header - "sw_if_index"
-                    "sw_if_index": items[1],
-                    "direction": items[2]
-                })
-            else:
-                raise RuntimeError(
-                    "Unexpected output from snat_interface_dump.")
-
-        return data
+        cmd = 'nat_show_config'
+        err_msg = 'Failed to get NAT configuration on host {host}'.\
+            format(host=node['host'])
+        with PapiExecutor(node) as papi_exec:
+            data = papi_exec.add(cmd).get_replies(err_msg).\
+                verify_reply(err_msg=err_msg)
+        logger.debug("NAT Configuration:\n{data}".format(data=pformat(data)))
+
+        cmds = [
+            "nat_worker_dump",
+            "nat44_interface_addr_dump",
+            "nat44_address_dump",
+            "nat44_static_mapping_dump",
+            "nat44_user_dump",
+            "nat44_interface_dump",
+            "nat44_user_session_dump",
+            "nat_det_map_dump"
+        ]
+        PapiExecutor.dump_and_log(node, cmds)
diff --git a/resources/libraries/python/PapiExecutor.py b/resources/libraries/python/PapiExecutor.py
index c2f966fb6d..98eb59cae7 100644
--- a/resources/libraries/python/PapiExecutor.py
+++ b/resources/libraries/python/PapiExecutor.py
@@ -17,6 +17,8 @@
 import binascii
 import json
 
+from pprint import pformat
+
 from robot.api import logger
 
 from resources.libraries.python.Constants import Constants
@@ -366,6 +368,21 @@ class PapiExecutor(object):
             ignore_errors=ignore_errors, err_msg=err_msg, timeout=timeout)
 
     @staticmethod
+    def dump_and_log(node, cmds):
+        """Dump and log requested information.
+
+        :param node: DUT node.
+        :param cmds: Dump commands to be executed.
+        :type node: dict
+        :type cmds: list
+        """
+        with PapiExecutor(node) as papi_exec:
+            for cmd in cmds:
+                dump = papi_exec.add(cmd).get_dump()
+                logger.debug("{cmd}:\n{data}".format(
+                    cmd=cmd, data=pformat(dump.reply[0]["api_reply"])))
+
+    @staticmethod
     def run_cli_cmd(node, cmd, log=True):
         """Run a CLI command.