Ping客户端创建原始套接字,向指定地址发送ping消息的代码怎么写
时间: 2024-05-13 18:17:13 浏览: 8
以下是一个简单的 Python 代码示例,用于创建原始套接字并发送ping消息到指定地址:
```python
import socket
import struct
import time
# 定义ICMP类型、代码、校验和计算函数和发送ping消息的函数
ICMP_ECHO_REQUEST = 8
ICMP_CODE = 0
ICMP_CHECKSUM = 0
def checksum(msg):
s = 0
for i in range(0, len(msg), 2):
w = (msg[i] << 8) + (msg[i+1])
s += w
s = (s >> 16) + (s & 0xffff)
s = ~s & 0xffff
return s
def send_ping(destination_addr, timeout=1):
# 创建原始套接字,使用IP协议
sock = socket.socket(socket.AF_INET, socket.SOCK_RAW, socket.IPPROTO_ICMP)
# 设置超时时间
sock.settimeout(timeout)
# 构造ICMP包
icmp_header = struct.pack("!BBHHH", ICMP_ECHO_REQUEST, ICMP_CODE, ICMP_CHECKSUM, 0, 0)
icmp_checksum = checksum(icmp_header)
icmp_header = struct.pack("!BBHHH", ICMP_ECHO_REQUEST, ICMP_CODE, icmp_checksum, 0, 0)
# 发送ICMP包到指定地址
sock.sendto(icmp_header, (destination_addr, 0))
# 接收响应消息
try:
data, addr = sock.recvfrom(1024)
icmp_type, code, checksum, packet_id, sequence = struct.unpack("!BBHHH", data[20:28])
if icmp_type == 0:
return True
except socket.timeout:
return False
finally:
sock.close()
# 发送ping消息到指定地址
destination_addr = "www.google.com"
result = send_ping(destination_addr)
if result:
print("Ping %s success" % destination_addr)
else:
print("Ping %s failed" % destination_addr)
```
在上述代码中,我们首先定义了ICMP类型、代码、校验和计算函数和发送ping消息的函数。然后,我们创建原始套接字,使用IP协议,并设置超时时间。接着,我们构造ICMP包,并将其发送到指定地址。最后,我们接收响应消息,判断是否成功发送ping消息。