selftests: Introduce a new script to generate tc batch file

#!/usr/bin/python3

"""

tdc_batch.py - a script to generate TC batch file

Copyright (C) 2017 Chris Mi <chrism@mellanox.com>

"""

import argparse

parser = argparse.ArgumentParser(description='TC batch file generator')

parser.add_argument("device", help="device name")

parser.add_argument("file", help="batch file name")

parser.add_argument("-n", "--number", type=int,

                    help="how many lines in batch file")

parser.add_argument("-o", "--skip_sw",

                    help="skip_sw (offload), by default skip_hw",

                    action="store_true")

parser.add_argument("-s", "--share_action",

                    help="all filters share the same action",

                    action="store_true")

parser.add_argument("-p", "--prio",

                    help="all filters have different prio",

                    action="store_true")

args = parser.parse_args()

device = args.device

file = open(args.file, 'w')

number = 1

if args.number:

    number = args.number

skip = "skip_hw"

if args.skip_sw:

    skip = "skip_sw"

share_action = ""

if args.share_action:

    share_action = "index 1"

prio = "prio 1"

if args.prio:

    prio = ""

    if number > 0x4000:

        number = 0x4000

index = 0

for i in range(0x100):

    for j in range(0x100):

        for k in range(0x100):

            mac = ("%02x:%02x:%02x" % (i, j, k))

            src_mac = "e4:11:00:" + mac

            dst_mac = "e4:12:00:" + mac

            cmd = ("filter add dev %s %s protocol ip parent ffff: flower %s "

                   "src_mac %s dst_mac %s action drop %s" %

                   (device, prio, skip, src_mac, dst_mac, share_action))

            file.write("%s\n" % cmd)

            index += 1

            if index >= number:

                file.close()

                exit(0)