#!/usr/bin/env python3


from sys import argv
from struct import pack, unpack
import socket
import re

# unhexlify(b'41414141') = b'AAAA'
# hexlify(b'AAAA') = b'41414141'
from binascii import hexlify, unhexlify




################### Helper methods #####################################################3

def p64(d):
    """Return d packed as 64-bit unsigned integer (little endian)."""
    return pack('<Q', d)



# Read exactly n bytes from the socket
def receive(n):
    buf = bytearray()
    while not len(buf) >= n:
        buf += s.recv(1)
    print(buf.decode())
    return bytes(buf)


# Read from socket until the character sequence delimiter is read
def receive_until(delimiter):
    buf = bytearray()
    while not delimiter in buf:
        buf += s.recv(1)
    print(buf.decode())
    return bytes(buf)


# Send data
def send(data):
    print(data)
    s.sendall(data)

# Send data + newline
def sendline(data):
    send(data + b'\n')


# Extract all hexadecimal numbers from a string s
def extract_hexstr(s):
    return re.findall(r'0x[0-9A-F]+',s.decode() , re.I)

# Convert hexstring (0x1234) to integer
def hexstr2int(s):
    return int(s, 16)





################### Create connection to target ########################################3


if len(argv) < 3:
    print("Usage:\npython3 filename.py <host> <port>")
    exit()

host = argv[1]
port = int(argv[2])

s = socket.create_connection((host, port))




################### Put your exploit code here #########################################3

receive_until(b'> ')