Python RawSocket Syn, pythonrawsocket

Python RawSocket Syn, pythonrawsocket
#! /Bin/env python #-*-coding: UTF-8-*-# must run the import socket import sys import timeimport random from struct import * # Calculate the checksum (msg): s = 0 #2 bytes for I in range (0, len (msg), 2): w = (ord (msg [I]) <8) + (ord (msg [I + 1]) s = s + w s = (s> 16) + (s & 0 xffff) s = ~ S & 0 xffff return s def CreateSocket (source_ip, dest_ip): try: s = socket. socket (socket. AF_INET, socket. SOCK_RAW, socket. IPPROTO_TCP) s. setsockopt (socket. IPPROTO_IP, socket. IP_HDRINCL, 1) blocks t socket. error, msg: print 'socket create error: ', str (msg [0]), 'message:', msg [1] sys. exit () # Set to manually provide the IP header # s. setsockopt (socket. IPPROTO_TCP, socket. IP_HDRINCL, 1) return s # create an IP header def CreateIpHeader (source_ip, Dest_ip): packet = ''# ip header option headerlen = 5 version = 4 tos = 0 tot_len = 20 + 20 id = random. randrange (18000,65535, 1) frag_off = 0 ttl = 255 protocol = socket. IPPROTO_TCP check = 10 saddr = socket. inet_aton (source_ip) daddr = socket. inet_aton (dest_ip) hl_version = (version <4) + headerlen ip_header = pack ('! BBHHHBBH4s4s ', hl_version, tos, tot_len, id, frag_off, ttl, protocol, check, saddr, daddr) return ip_header # create a TCP header def terminate (source_ip, dest_ip, dest_port ): # tcp Header option source = random. randrange (32000,62000, 1) # randomize a source port seq = 0 ack_seq = 0 doff = 5 # tcp flags fin = 0 syn = 1 rst = 0 psh = 0 ack = 0 urg = 0 window = socket. htons (8192) # maximum window size check = 0 urg_ptr = 0 offset_res = (Doff <4) + 0 tcp_flags = fin + (syn <1) + (rst <2) + (psh <3) + (ack <4) + (urg <5) tcp_header = pack ('! HHLLBBHHH ', source, dest_port, seq, ack_seq, offset_res, tcp_flags, window, check, urg_ptr) # source_address = socket. inet_aton (source_ip) dest_address = socket. inet_aton (dest_ip) placeholder = 0 protocol = socket. IPPROTO_TCP tcp_length = len (tcp_header) psh = pack ('! 4s4sBBH ', source_address, dest_address, placeholder, protocol, tcp_length); psh = psh + tcp_header; tcp_checksum = checksum (psh) # repackage the TCP header, and fill in the correct checksum tcp_header = pack ('! Comment ', source, dest_port, seq, ack_seq, offset_res, tcp_flags, window, tcp_checksum, urg_ptr) return tcp_header def range_scan (source_ip, dest_ip, start_port, end_port ): syn_ack_received = [] # Open Port Storage list for j in range (start_port, end_port): s = CreateSocket (source_ip, dest_ip) ip_header = CreateIpHeader (source_ip, dest_ip) tcp_header = create_tcp_syn_header (source_ip, dest_ip, j) packet = ip_header + tcp_header s. sendto (packet, (dest_ip, 0) print's. sendto', dest_ip, start_port, end_port data = s. recvfrom (1024) [0] [0:] ip_header_len = (ord (data [0]) & 0x0f) * 4 ip_header_ret = data [0: ip_header_len-1] Primary = (ord (data [32]) & 0xf0)> 2 primary = data [ip_header_len: ip_header_len + tcp_header_len-1] if ord (tcp_header_ret [13]) = 0x12: # SYN/ACK flags syn_ack_received.append (j) return syn_ack_received # The program starts from here: open_port_list = [] ipsource = '2017. 168.18.17 'ipdest = '192. 168.19.43 'start = 20 stop = 100 step = (stop-start)/10 scan_ports = range (start, stop, step) if scan_ports [len (scan_ports)-1] <stop: scan_ports.append (stop) print 'Scan _ ports. append ', stop for I in range (len (scan_ports)-1): opl = range_scan (ipsource, ipdest, scan_ports [I], scan_ports [I + 1]) open_port_list.append (opl) for I in range (len (open_port_list): print 'process #: ', I, 'open ports :', open_port_list [I] print 'a list of all open ports found: 'for I in range (len (open_port_list): for j in range (len (open_port_list [I]): print open_port_list [I] [j], ','View Code