# Copyright (c) 2018 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:
#
#     http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.

"""VAT executor library."""

import json
from os import remove

from paramiko.ssh_exception import SSHException
from robot.api import logger

from resources.libraries.python.ssh import SSH, SSHTimeout
from resources.libraries.python.Constants import Constants
from resources.libraries.python.PapiHistory import PapiHistory

__all__ = ['VatExecutor']


def cleanup_vat_json_output(json_output, vat_name=None):
    """Return VAT JSON output cleaned from VAT clutter.

    Clean up VAT JSON output from clutter like vat# prompts and such.

    :param json_output: Cluttered JSON output.
    :param vat_name: Name of the VAT script.
    :type json_output: JSON
    :type vat_name: str
    :returns: Cleaned up output JSON string.
    :rtype: JSON
    """

    retval = json_output
    clutter = ['vat#', 'dump_interface_table error: Misc']
    if vat_name:
        remote_file_path = '{0}/{1}/{2}'.format(Constants.REMOTE_FW_DIR,
                                                Constants.RESOURCES_TPL_VAT,
                                                vat_name)
        clutter.append("{0}(2):".format(remote_file_path))
    for garbage in clutter:
        retval = retval.replace(garbage, '')
    return retval


def get_vpp_pid(node):
    """Get PID of running VPP process.

    :param node: DUT node.
    :type node: dict
    :returns: PID of VPP process / List of PIDs if more VPP processes are
        running on the DUT node.
    :rtype: int or list
    """
    import resources.libraries.python.DUTSetup as PidLib
    pid = PidLib.DUTSetup.get_vpp_pid(node)
    return pid


class VatExecutor(object):
    """Contains methods for executing VAT commands on DUTs."""
    def __init__(self):
        self._stdout = None
        self._stderr = None
        self._ret_code = None
        self._script_name = None

    def execute_script(self, vat_name, node, timeout=120, json_out=True,
                       copy_on_execute=False):
        """Execute VAT script on remote node, and store the result. There is an
        option to copy script from local host to remote host before execution.
        Path is defined automatically.

        :param vat_name: Name of the vat script file. Only the file name of
            the script is required, the resources path is prepended
            automatically.
        :param node: Node to execute the VAT script on.
        :param timeout: Seconds to allow the script to run.
        :param json_out: Require JSON output.
        :param copy_on_execute: If true, copy the file from local host to remote
            before executing.
        :type vat_name: str
        :type node: dict
        :type timeout: int
        :type json_out: bool
        :type copy_on_execute: bool
        :raises SSHException: If cannot open connection for VAT.
        :raises SSHTimeout: If VAT execution is timed out.
        :raises RuntimeError: If VAT script execution fails.
        """
        ssh = SSH()
        try:
            ssh.connect(node)
        except:
            raise SSHException("Cannot open SSH connection to execute VAT "
                               "command(s) from vat script {name}"
                               .format(name=vat_name))

        if copy_on_execute:
            ssh.scp(vat_name, vat_name)
            remote_file_path = vat_name
            with open(vat_name, 'r') as vat_file:
                for line in vat_file:
                    PapiHistory.add_to_papi_history(node,
                                                    line.replace('\n', ''),
                                                    papi=False)
        else:
            remote_file_path = '{0}/{1}/{2}'.format(Constants.REMOTE_FW_DIR,
                                                    Constants.RESOURCES_TPL_VAT,
                                                    vat_name)

        cmd = "{vat_bin} {json} in {vat_path} script".format(
            vat_bin=Constants.VAT_BIN_NAME,
            json="json" if json_out is True else "",
            vat_path=remote_file_path)

        try:
            ret_code, stdout, stderr = ssh.exec_command_sudo(cmd=cmd,
                                                             timeout=timeout)
        except SSHTimeout:
            logger.error("VAT script execution timeout: {0}".format(cmd))
            raise
        except:
            raise RuntimeError("VAT script execution failed: {0}".format(cmd))

        self._ret_code = ret_code
        self._stdout = stdout
        self._stderr = stderr
        self._script_name = vat_name

    def write_and_execute_script(self, node, tmp_fn, commands, timeout=300,
                                 json_out=False):
        """Write VAT commands to the script, copy it to node and execute it.

        :param node: VPP node.
        :param tmp_fn: Path to temporary file script.
        :param commands: VAT command list.
        :param timeout: Seconds to allow the script to run.
        :param json_out: Require JSON output.
        :type node: dict
        :type tmp_fn: str
        :type commands: list
        :type timeout: int
        :type json_out: bool
        """
        with open(tmp_fn, 'w') as tmp_f:
            tmp_f.writelines(commands)

        self.execute_script(tmp_fn, node, timeout=timeout, json_out=json_out,
                            copy_on_execute=True)
        remove(tmp_fn)

    def execute_script_json_out(self, vat_name, node, timeout=120):
        """Pass all arguments to 'execute_script' method, then cleanup returned
        json output.

        :param vat_name: Name of the vat script file. Only the file name of
            the script is required, the resources path is prepended
            automatically.
        :param node: Node to execute the VAT script on.
        :param timeout: Seconds to allow the script to run.
        :type vat_name: str
        :type node: dict
        :type timeout: int
        """
        self.execute_script(vat_name, node, timeout, json_out=True)
        self._stdout = cleanup_vat_json_output(self._stdout, vat_name=vat_name)

    def script_should_have_failed(self):
        """Read return code from last executed script and raise exception if the
        script didn't fail."""
        if self._ret_code is None:
            raise Exception("First execute the script!")
        if self._ret_code == 0:
            raise AssertionError(
                "VAT Script execution passed, but failure was expected: {cmd}"
                .format(cmd=self._script_name))

    def script_should_have_passed(self):
        """Read return code from last executed script and raise exception if the
        script failed."""
        if self._ret_code is None:
            raise Exception("First execute the script!")
        if self._ret_code != 0:
            raise AssertionError(
                "VAT Script execution failed, but success was expected: {cmd}"
                .format(cmd=self._script_name))

    def get_script_stdout(self):
        """Returns value of stdout from last executed script."""
        return self._stdout

    def get_script_stderr(self):
        """Returns value of stderr from last executed script."""
        return self._stderr

    @staticmethod
    def cmd_from_template(node, vat_template_file, json_param=True, **vat_args):
        """Execute VAT script on specified node. This method supports
        script templates with parameters.

        :param node: Node in topology on witch the script is executed.
        :param vat_template_file: Template file of VAT script.
        :param vat_args: Arguments to the template file.
        :returns: List of JSON objects returned by VAT.
        """
        with VatTerminal(node, json_param=json_param) as vat:
            return vat.vat_terminal_exec_cmd_from_template(vat_template_file,
                                                           **vat_args)


class VatTerminal(object):
    """VAT interactive terminal.

    :param node: Node to open VAT terminal on.
    :param json_param: Defines if outputs from VAT are in JSON format.
        Default is True.
    :type node: dict
    :type json_param: bool

    """

    __VAT_PROMPT = ("vat# ", )
    __LINUX_PROMPT = (":~# ", ":~$ ", "~]$ ", "~]# ")

    def __init__(self, node, json_param=True):
        json_text = ' json' if json_param else ''
        self.json = json_param
        self._node = node
        self._ssh = SSH()
        self._ssh.connect(self._node)
        try:
            self._tty = self._ssh.interactive_terminal_open()
        except Exception:
            raise RuntimeError("Cannot open interactive terminal on node {0}".
                               format(self._node))

        for _ in range(3):
            try:
                self._ssh.interactive_terminal_exec_command(
                    self._tty,
                    'sudo -S {0}{1}'.format(Constants.VAT_BIN_NAME, json_text),
                    self.__VAT_PROMPT)
            except Exception:
                continue
            else:
                break
        else:
            vpp_pid = get_vpp_pid(self._node)
            if vpp_pid:
                if isinstance(vpp_pid, int):
                    logger.trace("VPP running on node {0}".
                                 format(self._node['host']))
                else:
                    logger.error("More instances of VPP running on node {0}.".
                                 format(self._node['host']))
            else:
                logger.error("VPP not running on node {0}.".
                             format(self._node['host']))
            raise RuntimeError("Failed to open VAT console on node {0}".
                               format(self._node['host']))

        self._exec_failure = False
        self.vat_stdout = None

    def __enter__(self):
        return self

    def __exit__(self, exc_type, exc_val, exc_tb):
        self.vat_terminal_close()

    def vat_terminal_exec_cmd(self, cmd):
        """Execute command on the opened VAT terminal.

        :param cmd: Command to be executed.

        :returns: Command output in python representation of JSON format or
            None if not in JSON mode.
        """
        PapiHistory.add_to_papi_history(self._node, cmd, papi=False)
        logger.debug("Executing command in VAT terminal: {0}".format(cmd))
        try:
            out = self._ssh.interactive_terminal_exec_command(self._tty, cmd,
                                                              self.__VAT_PROMPT)
            self.vat_stdout = out
        except Exception:
            self._exec_failure = True
            vpp_pid = get_vpp_pid(self._node)
            if vpp_pid:
                if isinstance(vpp_pid, int):
                    raise RuntimeError("VPP running on node {0} but VAT command"
                                       " {1} execution failed.".
                                       format(self._node['host'], cmd))
                else:
                    raise RuntimeError("More instances of VPP running on node "
                                       "{0}. VAT command {1} execution failed.".
                                       format(self._node['host'], cmd))
            else:
                raise RuntimeError("VPP not running on node {0}. VAT command "
                                   "{1} execution failed.".
                                   format(self._node['host'], cmd))

        logger.debug("VAT output: {0}".format(out))
        if self.json:
            obj_start = out.find('{')
            obj_end = out.rfind('}')
            array_start = out.find('[')
            array_end = out.rfind(']')

            if obj_start == -1 and array_start == -1:
                raise RuntimeError("VAT command {0}: no JSON data.".format(cmd))

            if obj_start < array_start or array_start == -1:
                start = obj_start
                end = obj_end + 1
            else:
                start = array_start
                end = array_end + 1
            out = out[start:end]
            json_out = json.loads(out)
            return json_out
        else:
            return None

    def vat_terminal_close(self):
        """Close VAT terminal."""
        # interactive terminal is dead, we only need to close session
        if not self._exec_failure:
            try:
                self._ssh.interactive_terminal_exec_command(self._tty,
                                                            'quit',
                                                            self.__LINUX_PROMPT)
            except Exception:
                vpp_pid = get_vpp_pid(self._node)
                if vpp_pid:
                    if isinstance(vpp_pid, int):
                        logger.trace("VPP running on node {0}.".
                                     format(self._node['host']))
                    else:
                        logger.error("More instances of VPP running on node "
                                     "{0}.".format(self._node['host']))
                else:
                    logger.error("VPP not running on node {0}.".
                                 format(self._node['host']))
                raise RuntimeError("Failed to close VAT console on node {0}".
                                   format(self._node['host']))
        try:
            self._ssh.interactive_terminal_close(self._tty)
        except:
            raise RuntimeError("Cannot close interactive terminal on node {0}".
                               format(self._node['host']))

    def vat_terminal_exec_cmd_from_template(self, vat_template_file, **args):
        """Execute VAT script from a file.

        :param vat_template_file: Template file name of a VAT script.
        :param args: Dictionary of parameters for VAT script.
        :returns: List of JSON objects returned by VAT.
        """
        file_path = '{}/{}'.format(Constants.RESOURCES_TPL_VAT,
                                   vat_template_file)
        with open(file_path, 'r') as template_file:
            cmd_template = template_file.readlines()
        ret = []
        for line_tmpl in cmd_template:
            vat_cmd = line_tmpl.format(**args)
            ret.append(self.vat_terminal_exec_cmd(vat_cmd.replace('\n', '')))
        return ret

# Copyright (c) 2018 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:
#
#     http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.

"""VAT executor library."""

import json
from os import remove

from paramiko.ssh_exception import SSHException
from robot.api import logger

from resources.libraries.python.ssh import SSH, SSHTimeout
from resources.libraries.python.Constants import Constants
from resources.libraries.python.PapiHistory import PapiHistory

__all__ = ['VatExecutor']


def cleanup_vat_json_output(json_output, vat_name=None):
    """Return VAT JSON output cleaned from VAT clutter.

    Clean up VAT JSON output from clutter like vat# prompts and such.

    :param json_output: Cluttered JSON output.
    :param vat_name: Name of the VAT script.
    :type json_output: JSON
    :type vat_name: str
    :returns: Cleaned up output JSON string.
    :rtype: JSON
    """

    retval = json_output
    clutter = ['vat#', 'dump_interface_table error: Misc']
    if vat_name:
        remote_file_path = '{0}/{1}/{2}'.format(Constants.REMOTE_FW_DIR,
                                                Constants.RESOURCES_TPL_VAT,
                                                vat_name)
        clutter.append("{0}(2):".format(remote_file_path))
    for garbage in clutter:
        retval = retval.replace(garbage, '')
    return retval


def get_vpp_pid(node):
    """Get PID of running VPP process.

    :param node: DUT node.
    :type node: dict
    :returns: PID of VPP process / List of PIDs if more VPP processes are
        running on the DUT node.
    :rtype: int or list
    """
    import resources.libraries.python.DUTSetup as PidLib
    pid = PidLib.DUTSetup.get_vpp_pid(node)
    return pid


class VatExecutor(object):
    """Contains methods for executing VAT commands on DUTs."""
    def __init__(self):
        self._stdout = None
        self._stderr = None
        self._ret_code = None
        self._script_name = None

    def execute_script(self, vat_name, node, timeout=120, json_out=True,
                       copy_on_execute=False):
        """Execute VAT script on remote node, and store the result. There is an
        option to copy script from local host to remote host before execution.
        Path is defined automatically.

        :param vat_name: Name of the vat script file. Only the file name of
            the script is required, the resources path is prepended
            automatically.
        :param node: Node to execute the VAT script on.
        :param timeout: Seconds to allow the script to run.
        :param json_out: Require JSON output.
        :param copy_on_execute: If true, copy the file from local host to remote
            before executing.
        :type vat_name: str
        :type node: dict
        :type timeout: int
        :type json_out: bool
        :type copy_on_execute: bool
        :raises SSHException: If cannot open connection for VAT.
        :raises SSHTimeout: If VAT execution is timed out.
        :raises RuntimeError: If VAT script execution fails.
        """
        ssh = SSH()
        try:
            ssh.connect(node)
        except:
            raise SSHException("Cannot open SSH connection to execute VAT "
                               "command(s) from vat script {name}"
                               .format(name=vat_name))

        if copy_on_execute:
            ssh.scp(vat_name, vat_name)
            remote_file_path = vat_name
            with open(vat_name, 'r') as vat_file:
                for line in vat_file:
                    PapiHistory.add_to_papi_history(node,
                                                    line.replace('\n', ''),
                                                    papi=False)
        else:
            remote_file_path = '{0}/{1}/{2}'.format(Constants.REMOTE_FW_DIR,
                                                    Constants.RESOURCES_TPL_VAT,
                                                    vat_name)

        cmd = "{vat_bin} {json} in {vat_path} script".format(
            vat_bin=Constants.VAT_BIN_NAME,
            json="json" if json_out is True else "",
            vat_path=remote_file_path)

        try:
            ret_code, stdout, stderr = ssh.exec_command_sudo(cmd=cmd,
                                                             timeout=timeout)
        except SSHTimeout:
            logger.error("VAT script execution timeout: {0}".format(cmd))
            raise
        except:
            raise RuntimeError("VAT script execution failed: {0}".format(cmd))

        self._ret_code = ret_code
        self._stdout = stdout
        self._stderr = stderr
        self._script_name = vat_name

    def write_and_execute_script(self, node, tmp_fn, commands, timeout=300,
                                 json_out=False):
        """Write VAT commands to the script, copy it to node and execute it.

        :param node: VPP node.
        :param tmp_fn: Path to temporary file script.
        :param commands: VAT command list.
        :param timeout: Seconds to allow the script to run.
        :param json_out: Require JSON output.
        :type node: dict
        :type tmp_fn: str
        :type commands: list
        :type timeout: int
        :type json_out: bool
        """
        with open(tmp_fn, 'w') as tmp_f:
            tmp_f.writelines(commands)

        self.execute_script(tmp_fn, node, timeout=timeout, json_out=json_out,
                            copy_on_execute=True)
        remove(tmp_fn)

    def execute_script_json_out(self, vat_name, node, timeout=120):
        """Pass all arguments to 'execute_script' method, then cleanup returned
        json output.

        :param vat_name: Name of the vat script file. Only the file name of
            the script is required, the resources path is prepended
            automatically.
        :param node: Node to execute the VAT script on.
        :param timeout: Seconds to allow the script to run.
        :type vat_name: str
        :type node: dict
        :type timeout: int
        """
        self.execute_script(vat_name, node, timeout, json_out=True)
        self._stdout = cleanup_vat_json_output(self._stdout, vat_name=vat_name)

    def script_should_have_failed(self):
        """Read return code from last executed script and raise exception if the
        script didn't fail."""
        if self._ret_code is None:
            raise Exception("First execute the script!")
        if self._ret_code == 0:
            raise AssertionError(
                "VAT Script execution passed, but failure was expected: {cmd}"
                .format(cmd=self._script_name))

    def script_should_have_passed(self):
        """Read return code from last executed script and raise exception if the
        script failed."""
        if self._ret_code is None:
            raise Exception("First execute the script!")
        if self._ret_code != 0:
            raise AssertionError(
                "VAT Script execution failed, but success was expected: {cmd}"
                .format(cmd=self._script_name))

    def get_script_stdout(self):
        """Returns value of stdout from last executed script."""
        return self._stdout

    def get_script_stderr(self):
        """Returns value of stderr from last executed script."""
        return self._stderr

    @staticmethod
    def cmd_from_template(node, vat_template_file, json_param=True, **vat_args):
        """Execute VAT script on specified node. This method supports
        script templates with parameters.

        :param node: Node in topology on witch the script is executed.
        :param vat_template_file: Template file of VAT script.
        :param vat_args: Arguments to the template file.
        :returns: List of JSON objects returned by VAT.
        """
        with VatTerminal(node, json_param=json_param) as vat:
            return vat.vat_terminal_exec_cmd_from_template(vat_template_file,
                                                           **vat_args)


class VatTerminal(object):
    """VAT interactive terminal.

    :param node: Node to open VAT terminal on.
    :param json_param: Defines if outputs from VAT are in JSON format.
        Default is True.
    :type node: dict
    :type json_param: bool

    """

    __VAT_PROMPT = ("vat# ", )
    __LINUX_PROMPT = (":~# ", ":~$ ", "~]$ ", "~]# ")

    def __init__(self, node, json_param=True):
        json_text = ' json' if json_param else ''
        self.json = json_param
        self._node = node
        self._ssh = SSH()
        self._ssh.connect(self._node)
        try:
            self._tty = self._ssh.interactive_terminal_open()
        except Exception:
            raise RuntimeError("Cannot open interactive terminal on node {0}".
                               format(self._node))

        for _ in range(3):
            try:
                self._ssh.interactive_terminal_exec_command(
                    self._tty,
                    'sudo -S {0}{1}'.format(Constants.VAT_BIN_NAME, json_text),
                    self.__VAT_PROMPT)
            except Exception:
                continue
            else:
                break
        else:
            vpp_pid = get_vpp_pid(self._node)
            if vpp_pid:
                if isinstance(vpp_pid, int):
                    logger.trace("VPP running on node {0}".
                                 format(self._node['host']))
                else:
                    logger.error("More instances of VPP running on node {0}.".
                                 format(self._node['host']))
            else:
                logger.error("VPP not running on node {0}.".
                             format(self._node['host']))
            raise RuntimeError("Failed to open VAT console on node {0}".
                               format(self._node['host']))

        self._exec_failure = False
        self.vat_stdout = None

    def __enter__(self):
        return self

    def __exit__(self, exc_type, exc_val, exc_tb):
        self.vat_terminal_close()

    def vat_terminal_exec_cmd(self, cmd):
        """Execute command on the opened VAT terminal.

        :param cmd: Command to be executed.

        :returns: Command output in python representation of JSON format or
            None if not in JSON mode.
        """
        PapiHistory.add_to_papi_history(self._node, cmd, papi=False)
        logger.debug("Executing command in VAT terminal: {0}".format(cmd))
        try:
            out = self._ssh.interactive_terminal_exec_command(self._tty, cmd,
                                                              self.__VAT_PROMPT)
            self.vat_stdout = out
        except Exception:
            self._exec_failure = True
            vpp_pid = get_vpp_pid(self._node)
            if vpp_pid:
                if isinstance(vpp_pid, int):
                    raise RuntimeError("VPP running on node {0} but VAT command"
                                       " {1} execution failed.".
                                       format(self._node['host'], cmd))
                else:
                    raise RuntimeError("More instances of VPP running on node "
                                       "{0}. VAT command {1} execution failed.".
                                       format(self._node['host'], cmd))
            else:
                raise RuntimeError("VPP not running on node {0}. VAT command "
                                   "{1} execution failed.".
                                   format(self._node['host'], cmd))

        logger.debug("VAT output: {0}".format(out))
        if self.json:
            obj_start = out.find('{')
            obj_end = out.rfind('}')
            array_start = out.find('[')
            array_end = out.rfind(']')

            if obj_start == -1 and array_start == -1:
                raise RuntimeError("VAT command {0}: no JSON data.".format(cmd))

            if obj_start < array_start or array_start == -1:
                start = obj_start
                end = obj_end + 1
            else:
                start = array_start
                end = array_end + 1
            out = out[start:end]
            json_out = json.loads(out)
            return json_out
        else:
            return None

    def vat_terminal_close(self):
        """Close VAT terminal."""
        # interactive terminal is dead, we only need to close session
        if not self._exec_failure:
            try:
                self._ssh.interactive_terminal_exec_command(self._tty,
                                                            'quit',
                                                            self.__LINUX_PROMPT)
            except Exception:
                vpp_pid = get_vpp_pid(self._node)
                if vpp_pid:
                    if isinstance(vpp_pid, int):
                        logger.trace("VPP running on node {0}.".
                                     format(self._node['host']))
                    else:
                        logger.error("More instances of VPP running on node "
                                     "{0}.".format(self._node['host']))
                else:
                    logger.error("VPP not running on node {0}.".
                                 format(self._node['host']))
                raise RuntimeError("Failed to close VAT console on node {0}".
                                   format(self._node['host']))
        try:
            self._ssh.interactive_terminal_close(self._tty)
        except:
            raise RuntimeError("Cannot close interactive terminal on node {0}".
                               format(self._node['host']))

    def vat_terminal_exec_cmd_from_template(self, vat_template_file, **args):
        """Execute VAT script from a file.

        :param vat_template_file: Template file name of a VAT script.
        :param args: Dictionary of parameters for VAT script.
        :returns: List of JSON objects returned by VAT.
        """
        file_path = '{}/{}'.format(Constants.RESOURCES_TPL_VAT,
                                   vat_template_file)
        with open(file_path, 'r') as template_file:
            cmd_template = template_file.readlines()
        ret = []
        for line_tmpl in cmd_template:
            vat_cmd = line_tmpl.format(**args)
            ret.append(self.vat_terminal_exec_cmd(vat_cmd.replace('\n', '')))
        return ret

# Copyright (c) 2018 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: # #     http://www.apache.org/licenses/LICENSE-2.0 # # Unless required by applicable law or agreed to in writing, software # distributed under the License is distributed on an "AS IS" BASIS, # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. # See the License for the specific language governing permissions and # limitations under the License. VAT executor library. Return VAT JSON output cleaned from VAT clutter.      Clean up VAT JSON output from clutter like vat# prompts and such.      :param json_output: Cluttered JSON output.     :param vat_name: Name of the VAT script.     :type json_output: JSON     :type vat_name: str     :returns: Cleaned up output JSON string.     :rtype: JSON #', 'dump_interface_table error: Misc'] Get PID of running VPP process.      :param node: DUT node.     :type node: dict     :returns: PID of VPP process / List of PIDs if more VPP processes are         running on the DUT node.     :rtype: int or list Contains methods for executing VAT commands on DUTs. Execute VAT script on remote node, and store the result. There is an         option to copy script from local host to remote host before execution.         Path is defined automatically.          :param vat_name: Name of the vat script file. Only the file name of             the script is required, the resources path is prepended             automatically.         :param node: Node to execute the VAT script on.         :param timeout: Seconds to allow the script to run.         :param json_out: Require JSON output.         :param copy_on_execute: If true, copy the file from local host to remote             before executing.         :type vat_name: str         :type node: dict         :type timeout: int         :type json_out: bool         :type copy_on_execute: bool         :raises SSHException: If cannot open connection for VAT.         :raises SSHTimeout: If VAT execution is timed out.         :raises RuntimeError: If VAT script execution fails. Write VAT commands to the script, copy it to node and execute it.          :param node: VPP node.         :param tmp_fn: Path to temporary file script.         :param commands: VAT command list.         :param timeout: Seconds to allow the script to run.         :param json_out: Require JSON output.         :type node: dict         :type tmp_fn: str         :type commands: list         :type timeout: int         :type json_out: bool Pass all arguments to 'execute_script' method, then cleanup returned         json output.          :param vat_name: Name of the vat script file. Only the file name of             the script is required, the resources path is prepended             automatically.         :param node: Node to execute the VAT script on.         :param timeout: Seconds to allow the script to run.         :type vat_name: str         :type node: dict         :type timeout: int Read return code from last executed script and raise exception if the         script didn't fail. Read return code from last executed script and raise exception if the         script failed. Returns value of stdout from last executed script. Returns value of stderr from last executed script. Execute VAT script on specified node. This method supports         script templates with parameters.          :param node: Node in topology on witch the script is executed.         :param vat_template_file: Template file of VAT script.         :param vat_args: Arguments to the template file.         :returns: List of JSON objects returned by VAT. VAT interactive terminal.      :param node: Node to open VAT terminal on.     :param json_param: Defines if outputs from VAT are in JSON format.         Default is True.     :type node: dict     :type json_param: bool # ", ) # ", ":~$ ", "~]$ ", "~]# ") Execute command on the opened VAT terminal.          :param cmd: Command to be executed.          :returns: Command output in python representation of JSON format or             None if not in JSON mode. Close VAT terminal. # interactive terminal is dead, we only need to close session Execute VAT script from a file.          :param vat_template_file: Template file name of a VAT script.         :param args: Dictionary of parameters for VAT script.         :returns: List of JSON objects returned by VAT.