creating a non-blocking socket?
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Hmm... I'm feeling a bit stupid for asking this, but after searching this forum, the MSDN WinSock reference and google for a while now I give up.
In every text I've read on sockets, non-blocking sockets are mentioned. What's not mentioned is how to make a socket non-blocking. How is this done?
I've created a socket like so:
SOCKET s = socket(AF_INET, SOCK_DGRAM, 0);
And then I receive data like this:
sockaddr_in saServer;
saServer.sin_family = AF_INET;
saServer.sin_addr.s_addr = htonl(INADDR_ANY);
saServer.sin_port = htons(27017);
bind(s, (sockaddr*) &saServer, sizeof(saServer));
sockaddr_in saClient;
int clientSize = sizeof(saClient);
char buf[1024];
memset(buf, 0, sizeof(buf));
recvfrom(s, buf, sizeof(buf), 0, (sockaddr*) &saClient, &clientSize);
I read that the last parameter is optional but the communication doesn't work at all when I replace it with 0.
You use ioctlsocket:
EDIT: Nonblocking sockets usually refers to using select to poll a socket or wait for data to be ready to be read:
u_long ulNonblocking = 1;ioctlsocket(s, FIONBIO, &ulNonblocking);EDIT: Nonblocking sockets usually refers to using select to poll a socket or wait for data to be ready to be read:
FD_SET fd;timeval timeVal;FD_ZERO(&fd);FD_SET(s, &fd)timeVal.tv_sec = 0;timeVal.tv_usec = 50000; // 50msint nRet = select(s, &fd, NULL, NULL, &timeVal);if(nRet == 0){ // Nothing to read}else if(nRet == -1){ // Error}else{ // socket can be read from}This topic is closed to new replies.
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