UDP广播实现远程控制

应用场景

1. 树莓派连接在一个动态IP的环境,我们需要知道ip地址进行ssh连接或者sftp文件上传
2. 远程执行命令,关机/杀进程/等

服务端 broadcast_server.py

# -*- coding:utf-8 -*-

import socket
import pickle
import os
import sys
reload(sys)
sys.setdefaultencoding('utf8')

s = socket.socket(socket.AF_INET, socket.SOCK_DGRAM)
s.setsockopt(socket.SOL_SOCKET, socket.SO_BROADCAST, 1)

PORT = 1060
s.bind(('', PORT))
print 'Listen...', s.getsockname()

def cmd(cmd):
    p = os.popen(cmd,'r',1)
    dat =  p.read()
    p.close()
    return dat

def get_result(action,code,params,message,dat):
    r = {
        "action":action,
        "params":params,
        "code":code,
        "data":dat,
        "message":message
    }
    return r


while True:
    data, address = s.recvfrom(65535)
    rec = pickle.loads(data)
    print('<-{}:{}'.format(address,rec ))
    sent = ""
    if rec['action'] == "cmd":
        res = cmd(rec['params'])
        sent = pickle.dumps(get_result("cmd",0,rec['params'],"操作成功",{'result':res.encode("utf-8")}))
        print('-> {}'.format(address ))
    s.sendto(sent.encode("utf-8"),address)

客户端 broadcast_client.py

import socket
import pickle
import argparse

parser = argparse.ArgumentParser()
parser.add_argument('-a','--action',help='the action you want to send')
parser.add_argument('-c','--cmd',help='the command you want to execute')
args = parser.parse_args()

print args.action,args.cmd
s = socket.socket(socket.AF_INET, socket.SOCK_DGRAM)
s.setsockopt(socket.SOL_SOCKET, socket.SO_BROADCAST, 1)

PORT = 1060

network = '<broadcast>'
sent_data = {
    'action':args.action,
    'params':args.cmd
}
s.sendto(pickle.dumps(sent_data).encode('utf-8'), (network, PORT))
rec = s.recv(65535)
b = pickle.loads(rec)
print "data:",b['data']['result']

使用说明:服务端程序放在宿主电脑中,我们还必须设置其开启自动运行,可在~/.bashrc 中写入执行命令
nohup python broadcast_server.py &

我们可以定义自己的action,去操作不同的功能,更多功能请自行斟酌.这是一个好思路,比如应用于家庭中对灯,窗帘等控制

客户端执行例子:

python broadcast_client.py -a cmd -c 'ifconfig'

python broadcast_client.py -a cmd -c 'netstat'

python broadcast_client.py -a cmd -c 'ps -aux | grep python'

python broadcast_client.py -a cmd -c 'kill -9 22234'

python broadcast_client.py -a cmd -c 'shutdown'

本小项目未完待续