Untitled

import socket
import traceback
import requests

# # socket de UDP
# udp_send_sock = socket.socket(socket.AF_INET, socket.SOCK_DGRAM)


# # socket RAW de citire a răspunsurilor ICMP
# icmp_recv_socket = socket.socket(socket.AF_INET, socket.SOCK_RAW, socket.IPPROTO_ICMP)
# icmp_recv_socket.bind(('', 0))

# # setam timout in cazul in care socketul ICMP la apelul recvfrom nu primeste nimic in buffer
# icmp_recv_socket.settimeout(5)

# def traceroute(ip, port):
    # setam TTL in headerul de IP pentru socketul de UDP
    
    # for i in range(1, 30):
    #     TTL = i
    #     udp_send_sock.setsockopt(socket.IPPROTO_IP, socket.IP_TTL, TTL)
        
    #     # trimite un mesaj UDP catre un tuplu (IP, port)
    #     udp_send_sock.sendto(b'salut', (ip, port))
        
    #     # asteapta un mesaj ICMP de tipul ICMP TTL exceeded messages
    #     # in cazul nostru nu verificăm tipul de mesaj ICMP
    #     # puteti verifica daca primul byte are valoarea Type == 11
    #     # https://tools.ietf.org/html/rfc792#page-5
    #     # https://en.wikipedia.org/wiki/Internet_Control_Message_Protocol#Header
    #     addr = 'done!'
    #     try:
    #         data, addr = icmp_recv_socket.recvfrom(63535)
    #     except Exception as e:
    #         print("Socket timeout ", str(e))
    #         print(traceback.format_exc())
    #     print(addr)
    #     if addr[0] == ip:
    #         break
    # return addr

    # i = 0
    # while i < 2:
    #     i += 1
    #     # setam TTL in headerul de IP pentru socketul de UDP
    #     TTL = i
    #     udp_send_sock.setsockopt(socket.IPPROTO_IP, socket.IP_TTL, TTL)

    #     # trimite un mesaj UDP catre un tuplu (IP, port)
    #     udp_send_sock.sendto(b'salut', (ip, port))

    #     try:
    #         data, addr = icmp_recv_socket.recvfrom(63535)
    #         print(addr)
    #     except Exception as e:
    #         print("Socket timeout ", str(e))
    #         print(traceback.format_exc())
    #         continue
    #     if addr[0] == ip:
    #         break
    # return addr

def traceroute(hostname):
    address = socket.gethostbyname(hostname)
    port = 33434
    max_hops = 30
    icmp = socket.getprotobyname('icmp')
    udp = socket.getprotobyname('udp')
    ttl = 1

    while True:
        recv_socket = socket.socket(socket.AF_INET, socket.SOCK_RAW, icmp)
        send_socket = socket.socket(socket.AF_INET, socket.SOCK_DGRAM, udp)
        send_socket.setsockopt(socket.SOL_IP, socket.IP_TTL, ttl)

        recv_socket.bind(("", port))
        send_socket.sendto(b'', (hostname, port))

        curr_addr = None
        curr_name = None
        try:
            _, curr_addr = recv_socket.recvfrom(512)
            curr_addr = curr_addr[0]
            try:
                curr_name = socket.gethostbyaddr(curr_addr)[0]
            except socket.error:
                curr_name = curr_addr
        except socket.error:
            pass
        finally:
            send_socket.close()
            recv_socket.close()

        if curr_addr is not None:
            curr_host = "%s (%s)" % (curr_name, curr_addr)
        else:
            curr_host = "*"

        print("%d\t%s" % (ttl, curr_host))

        ttl += 1
        if curr_addr == address or ttl > max_hops:
            break

    return curr_addr


'''
 Exercitiu hackney carriage (optional)!
    e posibil ca ipinfo sa raspunda cu status code 429 Too Many Requests
    cititi despre campul X-Forwarded-For din antetul HTTP
        https://www.nginx.com/resources/wiki/start/topics/examples/forwarded/
    si setati-l o valoare in asa fel incat
    sa puteti trece peste sistemul care limiteaza numarul de cereri/zi

    Alternativ, puteti folosi ip-api (documentatie: https://ip-api.com/docs/api:json).
    Acesta permite trimiterea a 45 de query-uri de geolocare pe minut.
'''

# exemplu de request la IP info pentru a
# obtine informatii despre localizarea unui IP
fake_HTTP_header = {
                    'referer': 'https://ipinfo.io/',
                    'user-agent': 'Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/67.0.3396.79 Safari/537.36'
                   }
# informatiile despre ip-ul 193.226.51.6 pe ipinfo.io
# https://ipinfo.io/193.226.51.6 e echivalent cu
# raspuns = requests.get('https://ipinfo.io/widget/193.226.51.6', headers=fake_HTTP_header)
# print(raspuns.json())
#
# # pentru un IP rezervat retelei locale da bogon=True
# raspuns = requests.get('https://ipinfo.io/widget/10.0.0.1', headers=fake_HTTP_header)
# print(raspuns.json())



if __name__ == '__main__':
    traceroute('google.com')