27.md

Socket Programming

PROJECT TYPE

• ssh
• scp
• scan tool
• hacking related
• logs graphs

---

communication mode

• one 2 one
• one 2 many - multicast
• one 2 all brodcast
• many 2 many

cell phone
sim/nic
phone /ip&mac

lo card dsenot have any mac address (127.0.0.1)

• ip:port -(0-65535)--socket

ipv4:port
4 byte + 2 byte --> 6 byte

ipv6 
16 byte + 2 byte --> 18byte

• IEEE --- IANA -- internet assinging number authority --0-1024 port(reserved)

python 3

socket programming ---

1. ip & port 
2. hotspot , wifi , lan connect
3. protocol --UDP/TCP

• UDP---> user datagram protocol --- whatsapp mesage
• TCP---> Trasmission control protocol --- Whastapp call

recv.py

#!/usr/bin/python3

import  socket 
recv_ip="192.168.1.57"
recv_port=4444  #    0 - 1024  -- you can check free udp port netstat -nulp

#  creating  udp socket
#               ip type v4 ,  uDp  
s=socket.socket(socket.AF_INET,socket.SOCK_DGRAM)
#  fitting    ip and port  with udp socket 
s.bind((recv_ip,recv_port))

#   recv  data  from  sender  
while  4  >  2  :
    data=s.recvfrom(100)  
    # converting   byte-like  to string 
    ndata=data[0].decode('ascii')
    print("message  from sender  ",ndata)
    print("sender IP + port --socket  ",data[1])
    #  reply to sender  
    rply=input("type your rply  : ")
    s.sendto(rply.encode('ascii'),data[1])


s.close()

sender.py

#!/usr/bin/python3

import  socket 
recv_ip="192.168.1.57"
recv_port=4444  #    0 - 1024  -- you can check free udp port netstat -nulp

#  creating  udp socket
#               ip type v4 ,  uDp  
s=socket.socket(socket.AF_INET,socket.SOCK_DGRAM)

while 4 >  3  :
    msg=input("plz  enter your message :   ")
    #  converting  str  to bytes-like object 
    nmsg=msg.encode('ascii')
#  sending  data  to target  
    s.sendto(nmsg,(recv_ip,recv_port)) 
    #  recv data  from  recv  
    print(s.recvfrom(10))

ssh client.py

#!/usr/bin/python3

import  socket
import  time

#  creating   UDP  socket with  ipv4  &  this is sender side

#socket.socket()   #  by default TCP 

#  to create UDP socket 
s=socket.socket(socket.AF_INET,socket.SOCK_DGRAM)

#  recv ip and port  
r_ip="192.168.10.100"
r_port=9900

while True:
#  now sending message to  receiver 
    data=input("plz enter your command  :-- > ")
#  lets convert into byte like  object
    newdata=data.encode('ascii')
    s.sendto(newdata,(r_ip,r_port))
#  here sendto is  sending  data &  ip -port of sender 
    print("###############")
    print("###############")
    print(s.recvfrom(100)[0])
    print("_________________")
    print("_________________")
#  this will recv ack from  receiver 

ssh server.py

#!/usr/bin/python3

import  socket
import  time
import  subprocess

#  creating   UDP  socket with  ipv4  &  this is rec side

#socket.socket()   #  by default TCP 

#  to create UDP socket 
s=socket.socket(socket.AF_INET,socket.SOCK_DGRAM)

#  recv ip and port  
r_ip="192.168.10.100"
r_port=9900

#  now  binding  both  port and ip 
s.bind((r_ip,r_port))

while True:
#  to recv data from sender
	recv_data=s.recvfrom(100)
#  here  recvfrom  will recv  data and ip port of sender 
	print(recv_data[0])   #  this means data
	print(recv_data[1])   #  address of sender 
	print("@@@@@@@@@@@@@@@@@")
	print("sending  output  to sender ")
	result=subprocess.getstatusoutput(recv_data[0])

	#  check the success rate
	if  result[0] ==  0  :

		s.sendto(result[1].encode('ascii'),recv_data[1])  #  sending output to sender 

	else :
		s.sendto("command not found ".encode('ascii'),recv_data[1])  #  sending output to sender