Linux bind：非socket上的socket操作
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bind: Socket operation on non-socket
提问by Ted Spradley
I writing a server and a client and keep getting 'bind: Socket operation on non-socket'.
我编写了一个服务器和一个客户端，并不断收到“绑定：非套接字上的套接字操作”。
I've researched the heck out of this, have other code that runs in another application and have exhausted 8 hours trying to find this bug.
我已经研究了这个问题，有其他代码在另一个应用程序中运行，并且已经用了 8 个小时试图找到这个错误。
The code is:
代码是：
void TCPSocket::buildTCPSocket(int port)
{
initializeSocket1();
getSocket();
bindSocket();
listenToSocket();
acceptSocket();
// now you can send() and recv() with the
// connected client via socket connectedTCPSocket
}
void TCPSocket::getSocket()
{
// Get an internet domain socket AF_INET
if(socket1 = socket(AF_INET, SOCK_STREAM,0) == -1)
{
perror("socket");
exit(1);
}
}
void TCPSocket::bindSocket()
{
// Bind to a port on the host
int myAddressSize = sizeof(myAddress);
int bindReturnValue = bind(socket1, (struct sockaddr *) &myAddress, AddressSize);
if (bindReturnValue == -1)
{
perror("bind"); // <== Error message generated here
exit(1);
}
printf("Socket for TCP bound to port %d\n", port);
}
Also, prior to this, I memset the memory block with this function.
另外，在此之前，我用这个函数来设置内存块。
void TCPSocket::initializeSocket1()
{
// Fill tcpSocket struct with 0's
memset(&myAddress, 'public:
struct sockaddr_in myAddress, clientAddress;
void buildTCPSocket(int newPort);
private:
int port;
int socket1, socket2;
socklen_t clientAddressLength;
', sizeof(myAddress));
myAddress.sin_family = AF_INET;
myAddress.sin_addr.s_addr = INADDR_ANY;
// Conver PORT to big-endian if necessary
myAddress.sin_port = htons(this->port);
}
Variables are declared in the header file of the class.
变量在类的头文件中声明。
void TCPSocket::getSocket()
{
// Get an internet domain socket AF_INET
if((socket1 = socket(AF_INET, SOCK_STREAM,0)) == -1)
{
perror("socket");
exit(1);
}
}
-- Edit the code should be a little more clear now. socket1 is initialized in getSocket().
-- 编辑代码现在应该更清楚了。socket1 在 getSocket() 中初始化。
I've seen where a bunch of guys have missed the parens in the if but I think I eliminated that error by declaring myAddressSize and bindReturnValue.
我已经看到很多人在 if 中错过了括号，但我认为我通过声明 myAddressSize 和 bindReturnValue 消除了该错误。
Any input is appreciated.
Thank you,
Ted S
任何输入表示赞赏。
谢谢你，泰德 S
Ok, problem solved. Of course the problem is never where you are looking are you would have found it. Here is the corrected code. The problem was in a missing set of parens in the call to socket().
好的，问题解决了。当然，问题永远不在于您正在寻找的地方，您会发现它。这是更正后的代码。问题在于对 socket() 的调用中缺少一组括号。
int socket1 = socket(AF_INET, SOCK_STREAM, 0);
bind(socket1, ...);
Thanks again!
再次感谢！
采纳答案by Mike Bailey
I can almost guarantee you that you're getting that error because you never initialized socket1.
我几乎可以向您保证您会收到该错误，因为您从未初始化过 socket1。
Typically you have to do something like this:
通常，您必须执行以下操作：
if ((foo = bar()) == ERROR)
{
// handle me
}
I don't see any code anywhere in there for setting up socket1. This is what the error message is telling you, after all. socket1 isn't a socket, so it's failing.
我在那里没有看到任何用于设置 socket1 的代码。毕竟，这就是错误消息告诉您的内容。socket1 不是套接字，所以它失败了。
Edit: As a follow up, this is one of the reasons why I try to avoid using the syntax
编辑：作为跟进，这是我尝试避免使用语法的原因之一
void TCPSocket::getSocket()
{
// Get an internet domain socket AF_INET
socket1 = socket(AF_INET, SOCK_STREAM, 0);
if (socket == -1)
{
perror("socket");
exit(1);
}
}
And instead stick with:
而是坚持：
##代码##