[网络协议]13001.udp广播接收程序（python）

1 udp 广播接收程序

struct.unpack 函数默认解析的网络字节序数据

import io
from socket import *
import sys
import time
import struct

udp_buf_len=128
UDP_PORT=10000

def bytes2float(byte_data):
    return struct.unpack("!f",byte_data)[0]

# 广播套接字初始化
def udp_broacast_init():
    s = socket(AF_INET, SOCK_DGRAM, 0)
    s.setsockopt(SOL_SOCKET, SO_BROADCAST, 1) # 设置广播模式
    s.setsockopt(SOL_SOCKET, SO_REUSEADDR, 1) # 设置重复绑定
    s.bind(('0.0.0.0', UDP_PORT))  # 绑定指定的地址和端口号
    print("udp_broacast_init ok.")
    return s

def udp_broadcat_recv(s):
    while True:
        data,addr = s.recvfrom(udp_buf_len)
        hvF_b = data[0:4] # 获取float 字节流数据.
        apd_b = data[4:8]
        temp_b = data[8:12]
        mems1_b = data[12:16]
        mems2_b = data[16:20]

        hvF = bytes2float(hvF_b)
        adpF = bytes2float(apd_b)
        tempF = bytes2float(temp_b)
        memsF1 = bytes2float(mems1_b)
        memsF2 = bytes2float(mems2_b)
        
        print("hvF:",hvF," apdF:", adpF, " tempF:", tempF, " memsF1:", memsF1, " memsF2:" , memsF2)
        #time.sleep(1)

def main():
    print("Hello world.")
    s = udp_broacast_init()
    udp_broadcat_recv(s)
    

if __name__ == '__main__':
    main()