def getTCPPacket(self):
"""
构造TCP数据包
:return:
"""
try:
ip_packet = IP()
ip_packet.version = int(self.entries[8].get())
ip_packet.ihl = int(self.entries[9].get())
ip_packet.tos = int(self.entries[10].get())
ip_packet.id = int(self.entries[11].get())
# ip_packet.flags = int(self.entries[12].get())
ip_packet.frag = int(self.entries[13].get())
ip_packet.ttl = int(self.entries[14].get())
# ip_packet.chksum = self.entries[15].get()
ip_packet.src = self.entries[16].get()
ip_packet.dst = self.entries[17].get()
tcp_packet = TCP()
tcp_packet.sport = int(self.entries[0].get())
tcp_packet.dport = int(self.entries[1].get())
tcp_packet.seq = int(self.entries[2].get())
tcp_packet.ack = int(self.entries[3].get())
tcp_packet.dataofs = int(self.entries[4].get())
tcp_packet.flags = int(self.entries[5].get())
tcp_packet.window = int(self.entries[6].get())
# tcp_packet.chksum = self.entries[7].get()
# scapy自动计算IP、TCP校验和
# 获得数据包的二进制值
pkg_raw = raw(ip_packet / tcp_packet)
tcp_packet_raw = pkg_raw[20:]
# 构造数据包，自动计算校验和
scapy_chksum_IP = IP(pkg_raw).chksum
scapy_chksum_tcp = TCP(tcp_packet_raw).chksum
print("scapy自动计算的TCP校验和为：%04x" % scapy_chksum_tcp)
# 手动计算TCP校验和
tcp_packet.chksum = 0
packet = ip_packet / tcp_packet
tcp_raw = raw(packet)[20:]
self_chksum = in4_chksum(socket.IPPROTO_TCP, packet[IP], tcp_raw)
print("手动计算的TCP校验和为：%04x" % self_chksum)
if self_chksum == scapy_chksum_tcp:
print("TCP验证和正确")
else:
print("TCP验证和不正确")
tcp_packet.chksum = scapy_chksum_tcp
self.entries[7].delete(0, END)
self.entries[7].insert(0, hex(scapy_chksum_tcp))
self.entries[15].delete(0, END)
self.entries[15].insert(0, hex(scapy_chksum_IP))
tcp_packet.show()
self.resultText.insert('end', tcp_packet.summary() + '\n')
self.resultText.insert('end', str(tcp_packet) + '\n')
return Ether() / ip_packet / tcp_packet
except Exception as e:
print(e.with_traceback())
finally:
pass
#traceroute
traceroute(["www.google.com"], maxttl=20)
#traceroute con puerto 23
traceroute (["10.1.99.2"],dport=23,maxttl=20)
#paquete por capas
IP()
IP()/TCP()
Ether()/IP()/TCP()
IP()/TCP()/"GET / HTTP/1.1\r\n\r\n"
Ether()/IP(dst="api.tidex.com")/TCP(dport=443)/"GET /api/3/ticker/eth_btc HTTP/1.1\r\nHost: api.tidex.com\r\nConnection: close\r\n\r\n"
Ether()/IP()/IP()/UDP()
#armado de paquetes por capas
a=Ether(); a.show()
b=IP(); b.show()
c=TCP(); c.show()
d=sr(a/b/c,timeout=2)
#enviar paquete por capas
ans,unans=sr(IP(dst="api.tidex.com")/TCP(sport=RandShort(),dport=443)/"GET /api/3/ticker/eth_btc HTTP/1.1\r\nHost: api.tidex.com\r\nConnection: close\r\n\r\n")
#############HTTP
##super importante
#https://stackoverflow.com/questions/9058052/unwanted-rst-tcp-packet-with-scapy
#iptables -A OUTPUT -p tcp --tcp-flags RST RST -s 192.168.43.55 -j DROP
load_layer("http")
req = HTTP()/HTTPRequest(
Accept_Encoding=b'gzip, deflate',
Cache_Control=b'no-cache',
Connection=b'keep-alive',
Host=b'www.secdev.org',