python编程拍照搜题答案软件

Traceroute是一种网络诊断工具，用于跟踪数据包在IP网络上的路径。在Python中，你可以使用socket库来实现Traceroute功能。下面是一个简单的示例代码，演示了如何使用Python编写Traceroute。

```python

import socket

import struct

import sys

import time

ICMP_ECHO_REQUEST = 8

ICMP_CODE = socket.getprotobyname('icmp')

def checksum(source_string):

计算校验和

sum = 0

count_to = (len(source_string) / 2) * 2

count = 0

while count < count_to:

this_val = source_string[count 1] * 256 source_string[count]

sum = sum this_val

sum = sum & 0xffffffff

count = count 2

if count_to < len(source_string):

sum = sum source_string[len(source_string) 1]

sum = sum & 0xffffffff

sum = (sum >> 16) (sum & 0xffff)

sum = sum (sum >> 16)

answer = ~sum

answer = answer & 0xffff

answer = answer >> 8 | (answer << 8 & 0xff00)

return answer

def build_packet():

构建ICMP包

my_checksum = 0

my_id = os.getpid() & 0xFFFF

header = struct.pack("bbHHh", ICMP_ECHO_REQUEST, 0, my_checksum, my_id, 1)

bytes_In_double = struct.calcsize("d")

data = (192 bytes_In_double) * "Q"

data = struct.pack("d", time.time()) bytes(data.encode('utf8'))

my_checksum = checksum(header data)

if sys.platform == 'darwin':

my_checksum = socket.htons(my_checksum) & 0xffff

else:

my_checksum = socket.htons(my_checksum)

header = struct.pack("bbHHh", ICMP_ECHO_REQUEST, 0, my_checksum, my_id, 1)

packet = header data

return packet

def parse_packet(packet):

解析ICMP包

ttl = struct.unpack("h", packet[36:38])[0]

saddr = ".".join(map(str, struct.unpack("BBBB", packet[42:46])))

length = len(packet)

return ttl, saddr, length

def main(dest_name):

dest_addr = socket.gethostbyname(dest_name)

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)

构建ICMP包

package = build_packet()

发送数据包

send_socket.sendto(package, (dest_name, 33434))

接收数据包

recv_socket.settimeout(5)

try:

data, dummy = recv_socket.recvfrom(1024)

except socket.error:

pass

finally:

recv_socket.close()

send_socket.close()

解析数据包

try:

ttl, saddr, length = parse_packet(data)

except:

pass

print(ttl, saddr, length)

if saddr == dest_addr or ttl > max_hops:

break

ttl = 1

```

在这个示例中，我们使用了Python的socket库来构建ICMP包，并发送、接收数据包。通过不断增加TTL值，我们可以逐步跟踪数据包的路径，直到达到目的地或者超过最大跳数限制。

你可以根据自己的需要对这段代码进行定制，以满足特定的Traceroute需求。

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