modified: README.md

new file:   api_add.png
	modified:   database/initdb.py
	new file:   database_add.png
	new file:   dns1.png
	new file:   dns2.png
	new file:   requirements.txt
	modified:   server/main.py
	modified:   server/serverconf.yaml
	modified:   server/xiaomiandns.py

README.md

@@ -1,27 +1,57 @@
-# my-tor-core
+# xiaomian DNS
 
-本项目是计算机网络的课程设计项目，该项目是一个类 Tor 的网络通信协议，旨在保护用户的隐私和匿名性。
+本项目是计算机网络的课程设计项目，该项目是一个私有DNS的简单实现。
 
 ## 项目原理
 
-本项目目标是实现三层代理 + dns 解析自定义域名.xiaomian + 搭建匿名网站。
-server路径下包含一个目录服务器，用于创建目录服务器，记录加入节点。
-client路径下是客户端程序，客户端程序通过访问目录服务器获取当前的路由，并通过随机路由算法选择代理节点。
+在server/xiaomiandns.py中实现了DNSserver和APIserver两个类。通过server/main.py启动实例化的server。配置文件在server/serverconf.yaml  
 本项目选择sqlite作为数据库，存储节点信息等数据。
 
 ## 环境依赖
-
 该项目依赖以下软件：  
-python 3.11
-sqlite3
+python 3
 
 ## 安装步骤
+```console
+# 安装依赖
+pip install -r requirements.txt
+
+#初始化数据库
+python3 database/initdb.py
+```
 
 ## 使用说明
-本项目中包含三种角色，client, node和server。每种角色运行所需要的代码在相应的项目文件夹下面。
-client： 即客户端。可以通过用户端连接小面网络、创建小面网站、访问别人创建的小面网站。
-node： 即代理节点。运行此程序可以将计算机加入小面网络中，代理连接流量
-server： 即DNS服务器和小面网站目录服务器。运行此程序可以作为server接受请求。
+```python
+python3 server/main.py
+```
+dns默认端口为53，域名api默认端口为81
+需要添加数据可以通过post方法向API提交数据
+usage: use POST method
+           /add
+           data: domian=xxxx&ip=xx.xx.xx.xx
+           /delete
+           data: domian=xxxx&ip=xx.xx.xx.xx
+注意域名只能以xiaomian作为根域名
+
+# 测试DNS功能：
+```console
+# Linux
+sudo apt install dnsutils
+dig @DNS_SERVER -p PORT DOMAIN 
+
+# Windows
+nslookup DOMAIN DNS_SERVER
+```
+# 测试API功能
+```console
+# Linux
+curl -d "domain=qqqwwweee.xiaomian&ip=123.12.23.34" -X POST http://10.20.117.208:81/add -i
+
+# Windows
+Invoke-WebRequest工具一直收不到post的body，不知道问题出在哪里
+
+## 未实现的功能
+目前只能把解析记录作为a记录返回，还未实现添加其他解析记录。
 
 ## 许可证
 

database/initdb.py

@@ -1,15 +1,33 @@
 import sqlite3
+import argparse
 
 # 用于创建
 db_file = 'database/dns.db'
 if __name__ == '__main__':
     conn = sqlite3.connect(db_file)
     cursor = conn.cursor()
+    parser = argparse.ArgumentParser()
+    parser.add_argument('--add', action='store_true', help='add test data')
+    args = parser.parse_args()
     try:
         cursor.execute(
             '''CREATE TABLE xiaomiandns(domain TEXT PRIMARY KEY, ip TEXT,timestamp DATETIME)''')
     except sqlite3.OperationalError:
         print("table xiaomiandns already exists")
     conn.commit()
+    if args.add:
+    
+        test_data = [
+        ('example.xiaomian', '192.168.1.1'),
+        ('google.xiaomian', '8.8.8.8'),
+        ('yahoo.xiaomian', '98.138.219.231')
+        ]
+
+        for data in test_data:
+            domain, ip = data
+            cursor.execute("INSERT INTO xiaomiandns (domain, ip, timestamp) VALUES (?, ?, DATETIME('now'))", (domain, ip))
+
+    # 提交更改到数据库
+    conn.commit()
     cursor.close()
     conn.close()

requirements.txt

@@ -0,0 +1,2 @@
+dnspython==2.3.0
+PyYAML==6.0

server/main.py

@@ -3,7 +3,7 @@ import yaml
 
 
 if __name__ == '__main__':
-    with open('serverconf.yaml', 'r') as f:
+    with open('server/serverconf.yaml', 'r') as f:
         config = yaml.safe_load(f)
     db_file = config['database']['db_file']
     DNS_port = config['DNS']['port']
@@ -11,5 +11,10 @@ if __name__ == '__main__':
     API_port = config['API']['port']
     API_listen_host = config['API']['listen_host']
 
-    DNSServer = xiaomiandns.DNSServer(DNS_listen_host, DNS_port, db_file)
-    DNSServer.run()
+    # start dns server
+    server = xiaomiandns.DNSServer(DNS_listen_host, DNS_port, db_file)
+    server.run()
+
+    # start dns api server
+    APIserver = xiaomiandns.DNSAPI(API_listen_host, API_port, db_file)
+    APIserver.run()

server/serverconf.yaml

@@ -1,5 +1,5 @@
 database:
-  db_file : '../database/dns.db'
+  db_file : 'database/dns.db'
 DNS:
   port : 53
   listen_host : "0.0.0.0"

server/xiaomiandns.py

@@ -7,12 +7,8 @@ import dns.rdatatype
 import dns.flags
 import dns.rcode
 import dns.rrset
-import time
 import sqlite3
 import re
-import base64
-from cryptography.hazmat.primitives.asymmetric import rsa, padding
-from cryptography.hazmat.primitives import serialization, hashes
 import yaml
 
 
@@ -74,7 +70,7 @@ class DNSServer:
         name = question.question[0].name
         # search domain in database
         dbcursor.execute(
-            "SELECT ip FROM xiaomiandns WHERE domain = ? AND nodetype = client", (str(name)[:-1],))
+            "SELECT ip FROM xiaomiandns WHERE domain = ?", (str(name)[:-1],))
         result = dbcursor.fetchone()
 
         # Create a new RRset for the answer
@@ -135,45 +131,37 @@ class DNSAPI:
             data = request.split('\r\n')[-1]
             response = self.handle_post_request(url, data)
         else:
-            response = self.handle_error_request(url)
+            response = self.handle_error_request()
 
         return response
 
     def handle_get_request(self, url):
-
-        # check url start with /add
-        # if re.match(r'^/add\?', url):
-        #     status_code = self.add_data(url[5:])
-        #     if status_code == 200:
-        #         reason_phrase = 'Add data successful'
-        #     else:
-        #         reason_phrase = 'Add data unsuccessful'
-        # # check url start with /delete
-        # elif re.match(r'^/delete\?', url):
-        #     status_code = self.delete_data(url[9:])
-        #     if status_code == 200:
-        #         reason_phrase = 'Delete data successful'
-        #     else:
-        #         reason_phrase = 'Delete data unsuccessful'
-        # else:
-        #     status_code = 400
-        #     reason_phrase = 'unsupport api'
-
+        status_code = 400
+        reason_phrase = 'unsupport method, please use POST method'
         response = 'HTTP/1.1 {} {}\r\n'.format(status_code, reason_phrase)
         return response.encode("utf-8")
 
-    def handle_post_request(self, url, data):
-        # 处理 POST 请求，data 是 POST 方法提交的数据
+    def handle_post_request(self, url:str, data:str)->str:
+        """处理 POST 请求
+
+        Args:
+            url (str): url前缀
+            data (str): POST 方法提交的数据
+
+        Returns:
+            str: http response
+        """
         
         # check url start with /add
-        if re.match(r'^/add\?', url):
+        if re.match(r'^/add', url):
             status_code = self.add_data(data)
             if status_code == 200:
                 reason_phrase = 'Add data successful'
             else:
                 reason_phrase = 'Add data unsuccessful'
+                
         # check url start with /delete
-        elif re.match(r'^/delete\?', url):
+        elif re.match(r'^/delete', url):
             status_code = self.delete_data(data)
             if status_code == 200:
                 reason_phrase = 'Delete data successful'
@@ -186,7 +174,7 @@ class DNSAPI:
         response = 'HTTP/1.1 {} {}\r\n'.format(status_code, reason_phrase)
         return response.encode("utf-8")
 
-    def handle_error_request(self, request):
+    def handle_error_request(self):
         status_code = 400
         reason_phrase = "unsupport method"
         headers = {
@@ -194,10 +182,20 @@ class DNSAPI:
             'Connection': 'close',
         }
         response = 'HTTP/1.1 {} {}\r\n'.format(status_code, reason_phrase)
+        for key, value in headers.items():
+            response += '{}: {}\r\n'.format(key, value)
+        response += '\r\n'
         return response.encode("utf-8")
 
-    def add_data(self, data):
+    def add_data(self, data:str)->int:
+        """add data to database
 
+        Args:
+            data (str): domain and ip
+
+        Returns:
+            int: status code
+        """
         # parse and check validation
         domain, ip = self.parse_data(data)
 
@@ -208,23 +206,33 @@ class DNSAPI:
         conn = sqlite3.connect(self.db_file)
         c = conn.cursor()
 
-        # Check if the data already exists
+        # Check if the domain already exists
         c.execute(
-            "SELECT * FROM xiaomiandns WHERE domain = ? OR ip = ?", (domain, ip))
-        existing_data = c.fetchall()
+            "SELECT * FROM xiaomiandns WHERE domain = ?", [domain])
+        existing_domain = c.fetchall()
         
-        c.close()
-        conn.close()
 
-        if existing_data:
-            return 400
+        if existing_domain:
+            c.execute("UPDATE xiaomiandns SET ip = ?, timestamp = DATETIME('now')  WHERE domain = ?",(ip,domain))
         else:
             # Insert the new data
             c.execute(
                 "INSERT INTO xiaomiandns (domain,ip,timestamp) VALUES (?,?,DATETIME('now'))", (domain, ip))
-            return 200
+        conn.commit()
+        c.close()
+        conn.close()
+        status_code = 200
+        return status_code
 
     def delete_data(self, data:str) -> int:
+        """delete record in database
+
+        Args:
+            data (str): domain and ip
+
+        Returns:
+            int: status code
+        """
         # parse and check validation
         domain, ip = self.parse_data(data)
         
@@ -232,14 +240,23 @@ class DNSAPI:
             return 400
 
         # connect db
-        
         conn = sqlite3.connect(self.db_file)
         c = conn.cursor()
         c.execute(
-            "DELETE FROM xiaomiandns WHERE domain = ? AND ip = ?", (domain, ip))
+            "DELETE FROM xiaomiandns WHERE domain = ? ", [domain])
+        deleted_rows = c.rowcount
+
+        if deleted_rows == 0:
+            # unmatch
+            status_code = 400
+        else:
+            # deleted
+            status_code = 200
+        conn.commit()
         c.close()
         conn.close()
-        return 200
+        
+        return status_code
 
     def parse_data(self, data:str) -> str :
         """parse data form post data
@@ -257,7 +274,6 @@ class DNSAPI:
         if domain and ip:
             domain = domain.group(1)
             ip = ip.group(1)
-            
         return domain, ip
 
     def check_data(self, domain, ip):