import socket  
# 目標(biāo)IP地址和端口  
target_ip = '192.168.1.100'  
target_port = 12345  
# 要發(fā)送的字符串  
message = 'Hello, this is a TCP message!'  
# 創(chuàng)建socket對(duì)象  
client_socket = socket.socket(socket.AF_INET, socket.SOCK_STREAM)  
# 連接到服務(wù)器  
client_socket.connect((target_ip, target_port))  
# 發(fā)送數(shù)據(jù)  
client_socket.sendall(message.encode('utf-8'))  
# 關(guān)閉連接  
client_socket.close()  
print(f'Message "{message}" sent to {target_ip}:{target_port} via TCP.')

import socket  
# 目標(biāo)IP地址和端口  
target_ip = '192.168.1.100'  
target_port = 12345  
# 要發(fā)送的字符串  
message = 'Hello, this is a UDP message!'  
# 創(chuàng)建socket對(duì)象  
client_socket = socket.socket(socket.AF_INET, socket.SOCK_DGRAM)  
# 發(fā)送數(shù)據(jù)  
client_socket.sendto(message.encode('utf-8'), (target_ip, target_port))  
# 關(guān)閉socket（對(duì)于UDP，這一步通常是可選的，因?yàn)閁DP是無(wú)連接的）  
client_socket.close()  
print(f'Message "{message}" sent to {target_ip}:{target_port} via UDP.')

import socket  
def send_tcp_message(ip, port, message):  
    """  
    通過(guò)TCP發(fā)送字符串到指定的IP地址和端口。  
    :param ip: 目標(biāo)IP地址  
    :param port: 目標(biāo)端口號(hào)  
    :param message: 要發(fā)送的字符串  
    """  
    try:  
        # 創(chuàng)建socket對(duì)象  
        client_socket = socket.socket(socket.AF_INET, socket.SOCK_STREAM)  
        # 連接到服務(wù)器  
        client_socket.connect((ip, port))  
        # 發(fā)送數(shù)據(jù)（需要先編碼為字節(jié)）  
        client_socket.sendall(message.encode('utf-8'))  
        # 假設(shè)服務(wù)器會(huì)發(fā)送回一些數(shù)據(jù)（這里只是為了演示接收）  
        response = client_socket.recv(1024).decode('utf-8')  
        print(f'Received from server: {response}')  
    except Exception as e:  
        print(f'An error occurred: {e}')  
    finally:  
        # 關(guān)閉socket  
        client_socket.close()  
# 使用函數(shù)  
target_ip = '192.168.1.100'  
target_port = 12345  
message = 'Hello, this is a TCP message!'  
send_tcp_message(target_ip, target_port, message)

import socket  
def send_udp_message(ip, port, message):  
    """  
    通過(guò)UDP發(fā)送字符串到指定的IP地址和端口。  
    :param ip: 目標(biāo)IP地址  
    :param port: 目標(biāo)端口號(hào)  
    :param message: 要發(fā)送的字符串  
    """  
    try:  
        # 創(chuàng)建socket對(duì)象  
        client_socket = socket.socket(socket.AF_INET, socket.SOCK_DGRAM)  
        # 發(fā)送數(shù)據(jù)（需要先編碼為字節(jié)）  
        client_socket.sendto(message.encode('utf-8'), (ip, port))  
    except Exception as e:  
        print(f'An error occurred: {e}')  
    finally:  
        # 對(duì)于UDP，關(guān)閉socket是可選的，但通常是個(gè)好習(xí)慣  
        client_socket.close()  
# 使用函數(shù)  
target_ip = '192.168.1.100'  
target_port = 12345  
message = 'Hello, this is a UDP message!'  
send_udp_message(target_ip, target_port, message)