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import socket
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import threading
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import time
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class TcpClient(object):
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def __init__(self):
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# 配置信息
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self.udpPort = 54321
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self.broadcastAddr = '<broadcast>'
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def discoverServers(self):
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print("[*] 正在扫描局域网设备...")
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udpSock = socket.socket(socket.AF_INET, socket.SOCK_DGRAM)
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udpSock.setsockopt(socket.SOL_SOCKET, socket.SO_BROADCAST, 1)
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udpSock.settimeout(2)
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udpSock.sendto(b"DISCOVERY_REQUEST", (self.broadcastAddr, self.udpPort))
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servers = []
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try:
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while True:
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data, addr = udpSock.recvfrom(1024)
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if data.startswith(b"DISCOVERY_RESPONSE"):
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# 修正点：正确解析服务端IP和TCP端口
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_, hostname, tcp_port = data.decode('utf-8').split(':')
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server_ip = addr # 提取IP字符串
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servers.append({
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'ip': server_ip, # 存储为字符串
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'port': int(tcp_port), # 存储为整数
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'hostname': hostname
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})
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print()
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except socket.timeout:
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pass
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finally:
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udpSock.close()
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return servers
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def connectToServer(self, ip, tcp_port):
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client = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
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try:
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# 显式转换类型确保安全
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client.connect((str(ip), int(tcp_port))) # :ml-citation{ref="2,3" data="citationList"}
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print(f"[+] 已连接到 {ip}:{tcp_port}")
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client.send(b"Hello from client!")
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response = client.recv(1024)
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print(f"服务端响应: {response.decode('utf-8')}")
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except Exception as e:
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print(f"连接失败: {e}")
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finally:
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client.close()
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if __name__ == '__main__':
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tcpClient = TcpClient()
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servers = tcpClient.discoverServers()
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if not servers:
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print("[-] 未找到可用服务端")
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exit()
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print("发现以下设备:")
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for i, s in enumerate(servers):
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print(f"{i+1}. {s['hostname']} ({s['ip']}:{s['port']})") # 显示格式修正
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print(servers)
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choice = int(input("请输入要连接的设备编号: ")) - 1
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selected = servers[choice]
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print(selected['ip'][0], selected['port'],88)
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tcpClient.connectToServer(selected['ip'][0], selected['port']) # 传递字符串和整数
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