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近日，笔者设法创造我的电脑和我的树莓派的插座，以使两个设备之间的通信。目前，客户端能够自动发送消息到服务器。我想知道，是否可以修改脚本来发送tcp数据包而不是纯文本消息，因为我非常想在将来使用我的PC控制覆盆子pi，而不需要ssh/etc。发送/接收数据包与TCP套接字
我看了一些例子，但我没有在写我自己的脚本/代码太多的经验，我不是很清楚如何去这样做。如果有人能够在正确的方向引导我解释并尽可能举例，我将不胜感激。
反正这里是我目前运行的服务器/客户端脚本：
客户：
import socket
import sys
import struct
import time
#main function
if __name__ == "__main__":
if(len(sys.argv) < 2) :
print 'Usage : python client.py hostname'
sys.exit()
host = sys.argv[1]
port = 8888
#create an INET, STREAMing socket
try:
s = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
except socket.error:
print 'Failed to create socket'
sys.exit()
print 'Socket Created'
try:
remote_ip = socket.gethostbyname(host)
s.connect((host, port))
except socket.gaierror:
print 'Hostname could not be resolved. Exiting'
sys.exit()
print 'Socket Connected to ' + host + ' on ip ' + remote_ip
#Send some data to remote server
message = "Test"
try :
#Set the whole string
while True:
s.send(message)
print 'Message sent successfully'
time.sleep(1)
print 'Sending...'
except socket.error:
#Send failed
print 'Send failed'
sys.exit()
def recv_timeout(the_socket,timeout=2):
#make socket non blocking
the_socket.setblocking(0)
#total data partwise in an array
total_data=[];
data='';
#beginning time
begin=time.time()
while 1:
#if you got some data, then break after timeout
if total_data and time.time()-begin > timeout:
break
#if you got no data at all, wait a little longer, twice the timeout
elif time.time()-begin > timeout*2:
break
#recv something
try:
data = the_socket.recv(8192)
if data:
total_data.append(data)
#change the beginning time for measurement
begin=time.time()
else:
#sleep for sometime to indicate a gap
time.sleep(0.1)
except:
pass
#join all parts to make final string
return ''.join(total_data)
#get reply and print
print recv_timeout(s)
s.close()
服务器：
import socket
import sys
from thread import *
HOST = '' # Symbolic name meaning all available interfaces
PORT = 8888
s = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
print 'Socket created'
try:
s.bind((HOST, PORT))
except socket.error , msg:
print 'Bind failed. Error Code : ' + str(msg[0]) + ' Message ' + msg[1]
sys.exit()
print 'Socket bind complete'
s.listen(10)
print 'Socket now listening'
#Function for handling connections
def clientthread(conn):
#Sending message to connected client
conn.send('Welcome to the server. Receving Data...\n') #send only takes string
#infinite loop so that function do not terminate and thread do not end.
while True:
#Receiving from client
data = conn.recv(1024)
reply = 'Message Received at the server!\n'
print data
if not data:
break
conn.sendall(reply)
conn.close()
#now keep talking with the client
while 1:
#wait to accept a connection
conn, addr = s.accept()
print 'Connected with ' + addr[0] + ':' + str(addr[1])
#start new thread
start_new_thread(clientthread ,(conn,))
s.close()
我读了RAW插槽，以及它们如何发送/接收TCP/IP原始数据包，并需要在脚本中手动指定的TCP和IP报头。将数据包发送到树莓派来控制它的一些功能会更好吗？ 对不起，如上所述，我没有太多的套接字和数据包的经验。我正在运行的脚本是标准套接字，并且“消息”有效载荷通过TCP传输，是否可以修改脚本部分以发送数据包（而不是文本数据）来完成这项工作？ – intensified
此外，socket.error处理是检查发送数据中的错误的唯一方法吗？或者有其他方法可以进行错误检查，例如，当服务器收到数据时，它会执行冗余检查以确保在传输过程中没有数据丢失？ – intensified