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
def getUDPPacket(self): """ 构造UDP数据包 :param self: :return: """ try: ip_packet = IP() ip_packet.version = int(self.entries[3].get()) ip_packet.ihl = int(self.entries[4].get()) ip_packet.tos = int(self.entries[5].get()) ip_packet.id = int(self.entries[6].get()) # ip_packet.flags = int(self.entries[7].get()) ip_packet.frag = int(self.entries[8].get()) ip_packet.ttl = int(self.entries[9].get()) # ip_packet.chksum = self.entries[10].get() ip_packet.src = self.entries[11].get() ip_packet.dst = self.entries[12].get() udp_packet = UDP() udp_packet.sport = int(self.entries[0].get()) udp_packet.dport = int(self.entries[1].get()) # udp_packet.chksum = int(self.entries[2].get()) # scapy自动计算IP、UDP校验和 # 获得数据包的二进制值 pkg_raw = raw(ip_packet / udp_packet) udp_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_udp = UDP(udp_packet_raw).chksum print("scapy自动计算的UDP校验和为:%04x" % scapy_chksum_udp) # 手动计算UDP校验和 udp_packet.chksum = 0 packet = ip_packet / udp_packet udp_raw = raw(packet)[20:] self_chksum = in4_chksum(socket.IPPROTO_UDP, packet[IP], udp_raw) print("手动计算的UDP校验和为:%04x" % self_chksum) if self_chksum == scapy_chksum_udp: print("UDP验证和正确") else: print("UDP验证和不正确") udp_packet.chksum = scapy_chksum_udp self.entries[2].delete(0, END) self.entries[2].insert(0, hex(scapy_chksum_udp)) self.entries[10].delete(0, END) self.entries[10].insert(0, hex(scapy_chksum_IP)) udp_packet.show() self.resultText.insert('end', udp_packet.summary() + '\n') self.resultText.insert('end', str(udp_packet) + '\n') return Ether() / ip_packet / udp_packet except Exception as e: print(e.with_traceback()) finally: pass
def getICMPPacket(self): """ 构造ICMP报文 :return: """ try: icmp_packet = IP() / ICMP() icmp_packet.version = int(self.entries[2].get()) icmp_packet.id = int(self.entries[3].get()) icmp_packet.flags = int(self.entries[4].get()) icmp_packet.frag = int(self.entries[5].get()) icmp_packet.ttl = int(self.entries[6].get()) # ip_packet.chksum = str(self.entries[7].get()) icmp_packet.src = str(self.entries[8].get()) icmp_packet.dst = str(self.entries[9].get()) icmp_packet.type = int(self.entries[0].get()) # icmp_packet.chksum = str(self.entries[1].get()) # 获得数据包的二进制值 pkg_raw = raw(icmp_packet) # 构造数据包,自动计算校验和 icmp_packet = IP(pkg_raw) # 去除数据包的IP首部,并构建ICMP对象,这样可以获得ICMP的校验和 pkg_icmp = pkg_raw[20:] pkg_icmp = ICMP(pkg_icmp) print("scapy自动计算的ICMP的校验和为:%04x" % pkg_icmp.chksum) self.entries[1].delete(0, END) self.entries[1].insert(0, hex(pkg_icmp.chksum)) self.entries[7].delete(0, END) self.entries[7].insert(0, hex(icmp_packet.chksum)) icmp_packet.show() self.resultText.insert('end', icmp_packet.summary() + '\n') self.resultText.insert('end', str(icmp_packet) + '\n') return Ether() / icmp_packet except Exception as e: print(e.with_traceback()) finally: pass