Ping timeout issues

Any of those help I'm using Apple's "Simple Ping" example and it has almost all features that I need, but I don't know where I can set timeout of each packet. It seems that it isn't possible because function that is used to write data to socket doesn't have any timeout parameters. Does anybody have idea to change this app to get ability to set timeout like in windows ping command? By timeout I mean time for each packet sent to be discarded after waiting for response too long. , Apple sample code:

bytesSent = sendto(
    CFSocketGetNative(self->_socket),
    sock,
    [packet bytes],
    [packet length], 
    0, 
    (struct sockaddr *) [self.hostAddress bytes], 
    (socklen_t) [self.hostAddress length]
);

CFSocketNativeHandle sock = CFSocketGetNative(self->_socket);
struct timeval tv;
tv.tv_sec  = 0;
tv.tv_usec = 100000; // 0.1 sec
setsockopt(sock, SOL_SOCKET, SO_SNDTIMEO, (void *)&tv, sizeof(tv));

bytesSent = sendto(
    sock,
    [packet bytes],
    [packet length], 
    0, 
    (struct sockaddr *) [self.hostAddress bytes], 
    (socklen_t) [self.hostAddress length]
);

I wish this helpful for you After a few days, we managed to find the culprit, it turn out, the somaxconn attributes in OS level, still in default value (128), considering our massive burst, we suggest client to configure the number into 1000;
Now, the amount of refused connection dropped 98.15%, for example, we could get almost 400 times refused connections in 1 day, now, it could drop to 6 - 9 per days.

this will help According to the MSDN page on Win32_PingStatus there is a property called "Timeout" (in milliseconds) that could probably be changed.
Try changing your query to

"select * from Win32_PingStatus where TimeOut = 500 and address = '" & xCell & "'"

should help you out A bridge network is used to isolate your container from your host network and that's why you're not able to ping from your host since your host and container is on different networks.
If you try the below command, you will find that it works:

docker run -it docker_nginx_server_1 ping 172.20.0.5

telnet 172.20.0.5 80

docker run -d -p 80:80 docker_nginx_server_1

http://localhost

I hope this helps . The parenthesis in your command are shell syntax for a subshell, but timeout doesn't run the command it starts through a shell. Instead, it runs it directly. It sees (: as the command name and tries to run it, which leads to an error since you're not likely to have such a command in the PATH.
You'll need to add an explicit shell there, with something like this:

timeout --preserve-status 5 bash -c "(: </dev/tcp/$vm_ip/22) &>/dev/null"