def pageRequest(url,source_ip,destination_ip,client_seq,client_ack,server_seq,server_ack):
host,path=netUtils.serverNameExtract(sys.argv[1])
data_req=layer5.reqGenGet(host,path)
print(data_req)
tcp_header = layer4.packTCPHeader(source_ip,destination_ip, source_port, client_seq, client_ack,'PSHACK',data_req)
ip_header = layer3.packHeader(source_ip,destination_ip)
pck = ip_header + tcp_header + data_req
soc = socks.createSendSock()
recsock=socks.createRecvSock()
soc.sendto(pck,(destination_ip,80))
raw=socks.recv(recsock)
ihl,tcph,src_ip,dest_ip,iph,data,payLength = netUtils.xtractPacket(raw)
soc.close()
recsock.close
#socks.debugPrintSeqNo(client_seq,client_ack,server_seq,server_ack)
[server_seq2,server_ack2]=layer4.getServerSeqNo(tcph)
k=len(data_req)+client_seq
#print("k="+str(k))
#socks.debugPrintSeqNo(client_seq,client_ack,server_seq2,server_ack2)
if tcph[5]==0x010 and tcph[1]==source_port and server_ack2==k and server_seq2==server_seq:
print("ACK packet recieved for get. handshake done")
#body=downloadPage(tcph,iph,source_ip,destination_ip,client_seq,client_ack)
data=socks.recData(destination_ip,source_ip,source_port,client_seq,client_ack,server_seq2,server_ack2)
header_data,body=layer5.xtractHeaders(data)
#print(header_data)
else:
sys.exit("NO ack recieved for GET.pLease try later")
return body
import layer2
import layer3
import layer4
import layer5
import netUtils
import performHandshake
source_ip=netUtils.get_source_ip()
source_mac=netUtils.get_source_mac()
source_port=netUtils.getFreePort()
host,path=netUtils.serverNameExtract(sys.argv[1])
destination_ip=socket.gethostbyname(host)
#print(dest_ip)
#129.10.116.81
dest_port=80
def handshake(source_ip,dest_ip,source_port):
client_seq,client_ack=performHandshake.sendSyn(source_ip,dest_ip,source_port)
print("syn packet sent")
tcph = performHandshake.recPacket(dest_ip)
server_seq=0
server_ack=tcph[3]
print (str(client_seq)+ " is our generated seq No.")
print(str(server_ack)+ " is ackNo given by server")
