小编Raj*_*esh的帖子

在我的程序中如果无法访问服务器,则连接功能会花费太多时间.所以我尝试使用select()给出时间来连接.现在的问题是,当我尝试使用recvfrom()从服务器接收数据时,我收到错误"EAGAIN".这是用于连接和接收来自服务器的数据的代码.

int sock;
struct sockaddr_in addr;
int connectWithServer
{

    int status;

    struct timeval  timeout;
    timeout.tv_sec = 10;
    timeout.tv_usec = 0;

    addr.sin_port = htons(port);
    sock = socket (AF_INET,SOCK_STREAM,0);
    inet_pton(AF_INET,serverIP,&addr.sin_addr);

    fd_set set;
    FD_ZERO(&set);
    FD_SET(sock, &set);

    fcntl(sock, F_SETFL, O_NONBLOCK);

    if ( (status = connect(sock, (struct sockaddr*)&addr, sizeof(addr))) == -1)
    {
        if ( errno != EINPROGRESS )
            return status;

    }
    status = select(sock+1, NULL, &set, NULL, &timeout);

    return status;
}


long int receiveResponse (void *response , unsigned int length)
{
    socklen_t sockLen = sizeof(struct …