使用newSocket.sin_port=htons(端口号)为套接字分配端口号时出错;
我试图分配一个函数传递给它的端口号。接收到的端口号在接收时正确显示,但当我尝试将该端口号分配给新插槽时,该端口号未分配,并且每次都分配其他一些52428号。我自己尽了最大努力想找出错误,但失败了:(请帮助我。下面是我的代码:使用newSocket.sin_port=htons(端口号)为套接字分配端口号时出错;,c,windows,sockets,visual-studio-2008,network-programming,C,Windows,Sockets,Visual Studio 2008,Network Programming,我试图分配一个函数传递给它的端口号。接收到的端口号在接收时正确显示,但当我尝试将该端口号分配给新插槽时,该端口号未分配,并且每次都分配其他一些52428号。我自己尽了最大努力想找出错误,但失败了:(请帮助我。下面是我的代码: DWORD WINAPI newrecvThreadProcedure(LPVOID param) { newRecvThreadDetailStruct* myDetailStruct = (newRecvThreadDetailStruct*) (
DWORD WINAPI newrecvThreadProcedure(LPVOID param)
{
newRecvThreadDetailStruct* myDetailStruct = (newRecvThreadDetailStruct*) (param);
char ipNumber[12], newDetail[256], threadNumber_char[12],
*detail = myDetailStruct>newsocketDetail;
int portNumber, threadNumber_int = myDetailStruct->threadNum;
sscanf(detail,"%s %d",ipNumber,&portNumber);
char displayPortNum[12];
itoa(portNumber,displayPortNum,10);
MessageBox( NULL, displayPortNum,"portnumber", MB_ICONINFORMATION); //Port Number displayed here is the value that I want i.e. 8880
// =======================================================================================
// Creating New Socket Now
WSADATA wsa;
//Initialise winsock
if (WSAStartup(MAKEWORD(2,2),&wsa) != 0)
{
//"WinSock Initialization FAILED"
return 0;
}
//Create a socket
SOCKET newSocketIdentifier;
SOCKADDR_IN newSocket;
if((newSocketIdentifier = socket(AF_INET , SOCK_DGRAM , 0 )) == INVALID_SOCKET)
{
//"Socket Creation Failed",
exit(EXIT_FAILURE);
}
//Socket Created
//Prepare the sockaddr_in structure
newSocket.sin_family = AF_INET;
newSocket.sin_addr.s_addr = INADDR_ANY;
newSocket.sin_port = htons(portNumber);
char char_port[12],*client_ip = inet_ntoa(newSocket.sin_addr);
int int_port = ntohs(newSocket.sin_port);
itoa(int_port,char_port,10);
MessageBox( NULL,char_port,client_ip,MB_ICONEXCLAMATION | MB_OK); /* Port number
displayed here is 52428 and IP Address is 0.0.0.0*/
}
字符串缓冲区
ipNumber
太小。它只有12个字符,但完整IP可能是“255.255.255.255”
,即16个字符(包括终止符)
因此,可能会出现缓冲区溢出,导致未定义的行为
您应该使用调试器查看结构的各个字段,以确保一切正常