如何使用 Python 替换 IPv6 地址的主机部分
在我们之前的文章在 Python 中使用 IPv6 地址和网络进行位操作中,我们展示了如何使用 ipaddress 模块在 Python 中执行位操作。在本文中,我们将使用之前的工作来仅替换 IPv6 地址的主机部分,保持网络部分不变 - 换句话说,我们将使用可配置的网络前缀长度将两个 IPv6 地址组合在一起。
replace_ipv6_host_part.py
import ipaddress
def bitwise_and_ipv6(addr1, addr2):
result_int = int.from_bytes(addr1.packed, byteorder="big") & int.from_bytes(addr2.packed, byteorder="big")
return ipaddress.IPv6Address(result_int.to_bytes(16, byteorder="big"))
def bitwise_or_ipv6(addr1, addr2):
result_int = int.from_bytes(addr1.packed, byteorder="big") | int.from_bytes(addr2.packed, byteorder="big")
return ipaddress.IPv6Address(result_int.to_bytes(16, byteorder="big"))
def bitwise_xor_ipv6(addr1, addr2):
result_int = int.from_bytes(addr1.packed, byteorder="big") ^ int.from_bytes(addr2.packed, byteorder="big")
return ipaddress.IPv6Address(result_int.to_bytes(16, byteorder="big"))
def replace_ipv6_host_part(net_addr, host_addr, netmask_length=64):
# 计算位掩码
prefix_network = ipaddress.IPv6Network(f"::/{netmask_length}")
hostmask = prefix_network.hostmask # ffff:ffff:ffff:ffff:: for /64
netmask = prefix_network.netmask # ::ffff:ffff:ffff:ffff for /64
# 计算地址
net_part = bitwise_and_ipv6(net_addr, netmask)
host_part = bitwise_and_ipv6(host_addr, hostmask)
# 组合结果 IP
return bitwise_or_ipv6(net_part, host_part)
# 用法示例:
# 从中获取网络部分("前缀")的 IP 地址
net_addr = ipaddress.IPv6Address("2a01:c22:6f71:9f00:8ce6:2eff:fe60:cc69")
# 从中获取主机部分(后缀)的 IP 地址
host_addr = ipaddress.IPv6Address("::dead:babe:cafe:0000")
print(replace_ipv6_host_part(net_addr, host_addr))这会打印
replace_ipv6_output.txt
IPv6Address('2a01:c22:6f71:9f00:dead:babe:cafe:0')Check out similar posts by category:
Networking, Python
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