请帮我用udp向多个客户端发送消息 [英] Please help me send message to multiple client using udp

问题描述

Hello guys

我想从服务器向许多客户端发送一些短信。客户端只在消息框上显示它们。因为有很多客户端，我得到一个udp套接字，向它发送数据，然后关闭。我的问题是：在将数据写入套接字后，如果我立即关闭套接字，则消息将丢失。我应该在哪里关闭插座？

提前谢谢

mr.abzadeh

编辑：原来的问题不清楚，所以我编辑了它

编辑：我的代码在这里添加（简化）

 SOCKET socket1 = socket（AF_INET，SOCK_DGRAM，IPPROTO_UDP）; 
 ADDRINFOW * pAddr; 
 ADDRINFOW提示; 
 memset（& hints，0，sizeof（hints））; 
 hints.ai_family = AF_INET; 
 hints.ai_protocol = IPPROTO_UDP; 
 hints.ai_socktype = SOCK_DGRAM; 
 GetAddrInfoW（wszHostName，lpPortName，& hints，& pAddr）; 
 sendto（socket1，（const char *）pBuf，uSendLen，0，pAddr-> ai_addr，Addr-> ai_addrlen）; 
 
 closesocket（socket1）; //这会杀死套接字并阻止消息传递
 

解决方案

为什么不按照文档建议的方式来做呢？考虑sendto（）返回值的原因可能很有用。



http://msdn.microsoft.com/en-us/library/windows/desktop/ms740148(v=vs.85).aspx [ ^ ]



这也可以帮到你：



http://gafferongames.com/networking-for-game-programmers/virtual-connection-over-udp/ [ ^ ]



这里的例子很好：

http://computing.unn.ac.uk/staff/cgmb3/teaching/sockets/D onahooWinAdaptsListings.pdf [ ^ ]

Hello guys
I want to send some text messages from server to many clients. client only show them on a messagebox. since there are many client, I get a udp socket, send data to it, and then closesocket. my problem is: after writing data to socket, If I immediately close the socket, message will be lost. where I should close the socket?
thanks in advance
mr.abzadeh
Edit: the original question was not clear, so I edited it
Edit: my code is added here(simplified)

SOCKET socket1 = socket(AF_INET, SOCK_DGRAM, IPPROTO_UDP);
 ADDRINFOW * pAddr;
 ADDRINFOW hints;
 memset(&hints, 0, sizeof(hints));
 hints.ai_family = AF_INET;
 hints.ai_protocol = IPPROTO_UDP;
 hints.ai_socktype = SOCK_DGRAM;
 GetAddrInfoW( wszHostName, lpPortName, &hints, &pAddr);
 sendto( socket1, (const char *)pBuf, uSendLen, 0, pAddr->ai_addr, Addr->ai_addrlen);

 closesocket(socket1);//This kills socket and prevents message delivery

解决方案

Why not just do it the way the documentation suggests? It may be productive to contemplate why sendto() returns a value.

http://msdn.microsoft.com/en-us/library/windows/desktop/ms740148(v=vs.85).aspx[^]

This may help you also:

http://gafferongames.com/networking-for-game-programmers/virtual-connection-over-udp/[^]

The examples here are good:
http://computing.unn.ac.uk/staff/cgmb3/teaching/sockets/DonahooWinAdaptsListings.pdf[^]

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