From 41d46dc492c74883cd7faacacacfa1343378025d Mon Sep 17 00:00:00 2001
From: fly6516 <fly6516@outlook.com>
Date: Wed, 8 Jan 2025 14:04:18 +0800
Subject: [PATCH] =?UTF-8?q?refactor(main):=20=E4=BC=98=E5=8C=96=20ICMP?=
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---
 main.py | 7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)

diff --git a/main.py b/main.py
index 1d0be1a..56f3fa3 100644
--- a/main.py
+++ b/main.py
@@ -102,12 +102,15 @@ def construct_icmp():
         bytes: 构造的ICMP报文。
     """
     # ICMP 报文头部: 类型(8), 代码(0), 校验和(0), 标识符(1), 序列号(1)
+    # 一开始校验和设为0，因为之后需要先计算校验和
     icmp_header = struct.pack('!BBHHH', 8, 0, 0, 1, 1)
+    # ICMP 报文的数据部分，这里简单地使用 'Ping' 作为示例数据
     data = b'Ping'
-    # 计算校验和
+    # 计算校验和，确保报文的完整性
     checksum = calculate_checksum(icmp_header + data)
-    # 填充校验和字段
+    # 填充校验和字段，完成报文头部的构造
     icmp_header = struct.pack('!BBHHH', 8, 0, checksum, 1, 1)
+    # 返回完整的ICMP报文
     return icmp_header + data
 
 # 构造 UDP 报文