无法分配请求的地址，C++ UDP 套接字 [英] Can't assign requested address, C++ UDP sockets

问题描述

以下代码来自http://digitalpbk.blogspot.com/2007/10/unix-networking-sockets-udp-transmitter.html，它在本地主机上运行良好，但是当我将其更改为我的 ip 时，它给出了错误

The following code is from http://digitalpbk.blogspot.com/2007/10/unix-networking-sockets-udp-transmitter.html, It runs fine on localhost but when I change it to my ip it gives the error

bind():无法分配请求的地址

bind(): Can't assign requested address

我一直在寻找解决方案几个小时，所以任何帮助都会很棒

I have been searching for a solution for a few hours so any help would be great

int main(void)
{

 struct sockaddr_in sin;
 char msg[10000];
 int ret;
 int sin_length;


 int s;

 s = socket(AF_INET, SOCK_DGRAM, 0);
 if(!s)
 {
  perror("socket()");
  return 0;
 }
 sin.sin_family = AF_INET;
 sin.sin_port = htons(65000);
 sin.sin_addr.s_addr = inet_addr("24.212.11.211"); // ---------------- This line ----------------
 if(bind(s, (struct sockaddr *)&sin, sizeof(sin)))
 {
  perror("bind()");
  return 1;
 }


 do  // I think the following might be a problem
 {
  sin_length = sizeof(sin);
  ret = recvfrom(s, msg, 10000, 0, (struct sockaddr *)&sin, (socklen_t*) &sin_length);
//Waits until a message is recieved...
  printf("Message[%s:%d] : %s\n",
  inet_ntoa(sin.sin_addr), sin.sin_port,msg);
 }
 while(msg[0]!='0');

 close(s);
 return 0;
}

推荐答案

很可能您将其更改为人们眼中的 IP，而不是您眼中的 IP.(假设函数采用的参数是windows)转到开始->控制面板->(网络和Internet->)网络连接/更改网络适配器设置然后右键单击您的网络适配器并选择状态，查看IP地址，这是您应该在代码中使用的那个.如果您不想为此担心，您可以随时使用 BIND TO ALL THE THINGS 地址，0.0.0.0.

Most likely you're changing it to the IP that people see you as, not the IP you see yourself as. (Assuming windows from the parameters the functions take) Go to start -> control panel -> (Network & Internet ->) network connection/change network adapter settings and then right click on your network adapter and select status, look at IP address, that is the one you should be using in your code. If you don't want to worry about that, you can always use the BIND TO ALL THE THINGS address, 0.0.0.0.

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