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
def recPacket(destn_ip): recsock=socks.createRecvSock() while True: raw = socks.recv(recsock) ihl,tcph,source_ip,dest_ip,iph,data,payL = netUtils.xtractPacket(raw) #server_ack=tcph[3] if source_ip == destn_ip and tcph[0]==80 and tcph[5]==18: #print "SYNACK recieved" #print tcph break return tcph
def getImpData(raw1): ihl,tcph,src_ip,dest_ip,iph,data,payLength = netUtils.xtractPacket(raw1) [server_seq,server_ack]=layer4.getServerSeqNo(tcph) [src_port,dest_port]=layer4.getPorts(tcph) flag=layer4.getPacType(tcph) return [src_ip,server_seq,server_ack,dest_port,payLength,flag,data]