datarcv,addr = UDPSerSocket.recvfrom(BUFUSIZE) error: [Errno 10022]

本文介绍了一个UDP客户端和服务端通信的实例,包括客户端如何向服务端发送数据,服务端接收并转发数据到另一客户端的过程。通过示例代码展示了如何解决客户端与服务端通信时出现的问题。

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在编程的时候,想将客户端代码发送给服务端,服务端再发送一段代码给另外一个客户端

在改动客户端的时候出现了上述错误,解决方案如下:

客户端代码:

import socket
HOST = '192.168.1.101'
PORT = 8803
ADDR = (HOST,PORT)
BUFUSIZE = 1024

UDPSerSocket = socket.socket(socket.AF_INET,socket.SOCK_DGRAM)  # 创建套接字
UDPSerSocket.bind(ADDR)
while True:
    '''
    data = raw_input('>')   # 输入参数
    if not data:
        break
    print 'The sending data is ',data
    UDPSerSocket.sendto(data,ADDR)  # 发送到特定的地址
    '''
    datarcv,addr = UDPSerSocket.recvfrom(BUFUSIZE)
    if not datarcv:
        break
    print 'The recive data is ',datarcv


服务端代码:

# coding=utf-8

import socket
import time
HOST = '192.168.1.101'  # 主机,因为是本机所以是localhost,或者127.0.0.1也可以
BUFFSIZE = 1024  # 每次读取数据的缓存区大小
PORT = 8802  # 端口,也就是客户端要连接的端口
ADDR = (HOST, PORT)  # 将主机地址和端口组成一个tuple形式的地址

UDPSerSocket = socket.socket(socket.AF_INET,socket.SOCK_DGRAM)
UDPSerSocket.bind(ADDR)
ADDR1 = (HOST, PORT+1)
print('waiting for connect...')
while True:
    data,addr = UDPSerSocket.recvfrom(BUFFSIZE)
    print 'Received',data,'from',addr,'in [%s]'%time.ctime()
    UDPSerSocket.sendto('[%s]:%s'%(time.ctime(),data),ADDR1)
解决方案:就是在客户端加一个

UDPSerSocket.bind(ADDR)
由于变成了服务端,需要改变相应端口


k1@k1:~/work/CDemo$ gcc 170.c 170.c: In function ‘main’: 170.c:147:12: error: variable ‘phdr’ has initializer but incomplete type struct pseudo_udp_header phdr = { ^ 170.c:148:9: error: unknown field ‘src_ip’ specified in initializer .src_ip = ip_hdr->saddr, ^ 170.c:148:19: warning: excess elements in struct initializer .src_ip = ip_hdr->saddr, ^ 170.c:148:19: note: (near initialization for ‘phdr’) 170.c:149:9: error: unknown field ‘dst_ip’ specified in initializer .dst_ip = ip_hdr->daddr, ^ 170.c:149:19: warning: excess elements in struct initializer .dst_ip = ip_hdr->daddr, ^ 170.c:149:19: note: (near initialization for ‘phdr’) 170.c:150:9: error: unknown field ‘zero’ specified in initializer .zero = 0, ^ 170.c:150:17: warning: excess elements in struct initializer .zero = 0, ^ 170.c:150:17: note: (near initialization for ‘phdr’) 170.c:151:9: error: unknown field ‘protocol’ specified in initializer .protocol = IPPROTO_UDP, ^ 170.c:152:9: error: unknown field ‘length’ specified in initializer .length = udp_hdr->len ^ 170.c:152:19: warning: excess elements in struct initializer .length = udp_hdr->len ^ 170.c:152:19: note: (near initialization for ‘phdr’) 170.c:147:30: error: storage size of ‘phdr’ isn’t known struct pseudo_udp_header phdr = { ^ 170.c:284:24: error: variable ‘ack_phdr’ has initializer but incomplete type struct pseudo_udp_header ack_phdr = { ^ 170.c:285:21: error: unknown field ‘src_ip’ specified in initializer .src_ip = ack_ip->saddr, ^ 170.c:285:31: warning: excess elements in struct initializer .src_ip = ack_ip->saddr, ^ 170.c:285:31: note: (near initialization for ‘ack_phdr’) 170.c:286:21: error: unknown field ‘dst_ip’ specified in initializer .dst_ip = ack_ip->daddr, ^ 170.c:286:31: warning: excess elements in struct initializer .dst_ip = ack_ip->daddr, ^ 170.c:286:31: note: (near initialization for ‘ack_phdr’) 170.c:287:21: error: unknown field ‘zero’ specified in initializer .zero = 0, ^ 170.c:287:29: warning: excess elements in struct initializer .zero = 0, ^ 170.c:287:29: note: (near initialization for ‘ack_phdr’) 170.c:288:21: error: unknown field ‘protocol’ specified in initializer .protocol = IPPROTO_UDP, ^ 170.c:289:21: error: unknown field ‘length’ specified in initializer .length = ack_udp->len ^ 170.c:289:31: warning: excess elements in struct initializer .length = ack_udp->len ^ 170.c:289:31: note: (near initialization for ‘ack_phdr’) 170.c:284:42: error: storage size of ‘ack_phdr’ isn’t known struct pseudo_udp_header ack_phdr = { ^ k1@k1:~/work/CDemo$
08-09
``` static int iServerSocket; static stNetAddr stClient; //static pthread_t iServerThread; int UDPSvr_Run(IN int iPacketSize) { int iRet = -1; int iTaskID = 0; //int iClientSocket; char cBuffer[cmnDfn_BUFF_LEN]; struct sockaddr_in stClientAddr; socklen_t slClientLen = sizeof(stClientAddr); memset(&stClient, 0, sizeof(stClient)); while (g_iExit == 0) { if((recvfrom(iServerSocket,cBuffer,cmnDfn_BUFF_LEN,0,(struct sockaddr *)&stClientAddr,&slClientLen)) < 0) { cmn_PrtError("Error in receiving data"); } if (stClient.staddr.sin_port == 0) { stClient.iServerSocket = iServerSocket; stClient.staddr = stClientAddr; stClient.iByteNumber = iPacketSize; } else if (stClient.staddr.sin_addr.s_addr == stClientAddr.sin_addr.s_addr && stClient.staddr.sin_port == stClientAddr.sin_port) { stClient.iServerSocket = iServerSocket; stClient.staddr = stClientAddr; stClient.iByteNumber = iPacketSize; } else { continue; } if(ThreadPoolSubmit(UDPRcvTrd, &stClient,&iTaskID) < 0) { cmn_PrtError("Error in submitting task to thread pool"); } if(ThreadPoolSubmit(UDPSndTrd, &stClient,&iTaskID) < 0) { cmn_PrtError("Error in submitting task to thread pool"); } } iRet = 0; _Exit: return iRet; } int UDPSvr_Create(void) { int iRet = -1; struct sockaddr_in stServerAddr; g_iExit = 0; iServerSocket = socket(AF_INET, SOCK_DGRAM, 0); if (iServerSocket < 0) { cmn_PrtError("Error in creating socket"); } memset(&stServerAddr, 0, sizeof(stServerAddr)); stServerAddr.sin_family = AF_INET; stServerAddr.sin_port = htons(8080); stServerAddr.sin_addr.s_addr = (INADDR_ANY); if(bind(iServerSocket, (struct sockaddr *)&stServerAddr, sizeof(stServerAddr)) < 0) { cmn_PrtError("Error in binding socket"); } if(ThreadPoolInit() < 0) { cmn_PrtError("Error in initializing thread pool"); } iRet = 0; _Exit: return iRet; } int UDPSvr_Destroy(void) { int iRet = -1; //g_iExit = -1; if(ThreadPoolDestroy() < 0) { cmn_PrtError("Error in destroying thread pool"); } if (iServerSocket != -1) { close(iServerSocket); iServerSocket = -1; } /*if(iServerThread != -1) { pthread_join(iServerThread, NULL); iServerThread = -1; }*/ iRet = 0; _Exit: return iRet; }```检查代码是否有bug并给出解决方案
03-22
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