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74 lines
2.3 KiB
74 lines
2.3 KiB
1 year ago
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# -*- coding: utf-8 -*-
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#
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import asyncio
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import socket
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import struct
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import time
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from settings.utils import generate_ips
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def calculate_checksum(data):
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# 计算 ICMP 校验和
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checksum = 0
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if len(data) % 2 == 1:
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data += b'\x00'
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for i in range(0, len(data), 2):
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w = (data[i] << 8) + data[i+1]
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checksum += w
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checksum = (checksum >> 16) + (checksum & 0xffff)
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checksum = ~checksum & 0xffff
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return checksum
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async def once_traceroute(target, display, max_hops=30, timeout=3):
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loop = asyncio.get_event_loop()
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icmp = socket.getprotobyname('icmp')
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sock_fd = socket.socket(socket.AF_INET, socket.SOCK_RAW, icmp)
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for ttl in range(1, max_hops+1):
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# 设置 TTL
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sock_fd.setsockopt(socket.IPPROTO_IP, socket.IP_TTL, ttl)
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# 设置超时时间
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sock_fd.settimeout(timeout)
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# 发送 ICMP Echo 请求数据包
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packet = struct.pack('!BBHHH', 8, 0, 0, 12345, ttl)
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checksum = calculate_checksum(packet)
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packet = struct.pack('!BBHHH', 8, 0, checksum, 12345, ttl)
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start_time = time.time()
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sock_fd.sendto(packet, (target, 0))
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await asyncio.sleep(0.01)
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try:
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# 接收 ICMP Echo Reply 数据包
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recv_packet, addr = await loop.sock_recvfrom(sock_fd, 1024)
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end_time = time.time()
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# 解析目标地址
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dest_ip = addr[0]
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# 获取跃点信息
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hop_info = f'{ttl} {dest_ip} ({dest_ip})'
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# 获取延迟时间信息
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delay_info = f'{(end_time - start_time) * 1000:.3f} ms'
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# 打印跃点信息和延迟时间
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await display(f'{hop_info:<4} {delay_info}')
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if dest_ip == target:
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return
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except socket.timeout:
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# 发生超时，跳出循环
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await display(f'{ttl} *')
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sock_fd.close()
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async def verbose_traceroute(dest_ips, timeout=10, display=None):
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if not display:
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return
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ips = generate_ips(dest_ips)
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await display(f'Total valid address: {len(ips)}\r\n')
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for dest_ip in ips:
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await display(f'traceroute to {dest_ip}, 30 hops max, 60 byte packets')
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msg = ''
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try:
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await once_traceroute(dest_ip, display)
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except Exception as e:
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msg = f'Error: {e}'
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await display(msg)
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