SocketRocket scan network and connect - ios

Question

I'm new to SocketRocket and what I want to do is to scan the network 192.168.1.x and when it finds the server connect to it.
this is my code:
NSString *seg=#"ws://192.168.1.";
NSString *puerto=#":5000";
self.socketReady = NO;
for (int i=0; i<255; i++) {
NSMutableString *ip =[[NSMutableString alloc]init];
[ip appendString:seg];
[ip appendString:[#(i) stringValue]];
[ip appendString:puerto];
self.serverSocket = [[SRWebSocket alloc] initWithURL:[[NSURL alloc] initWithString:ip]];
self.serverSocket.delegate = self;
[self.serverSocket open];
}
I know that [self.serverSocket open] can only be done once, but I don't know how to scan and then connect to the server.

Answer 1

[self.serverSocket open] is an asynchronous call - that is, it will immediately return, with your delegate method webSocketDidOpen: being called when/if the socket successfully connects or didFailWithError: if it doesn't.
You could change you loop so that it used a local variable rather than your property -
NSString *seg=#"ws://192.168.1.";
int puerto=5000;
for (int i=0; i<255; i++) {
NSString *ip =[NSString stringWithFormat:#"%#%d:%d",seg,i,puerto];
SRWebSocket *newSocket = [[SRWebSocket alloc] initWithURL:[[NSURL alloc] initWithString:ip]];
newSocket.delegate = self;
[newSocket open];
}
and then in the delegate method you would need to store the socket that connected successfully -
- (void)webSocketDidOpen:(SRWebSocket *)webSocket
{
self.serverSocket=webSocket;
//TO DO start processing data on the socket...
}
BUT this is a pretty ugly way of locating and connecting to a service:
It 'spams' the local network with multiple connection requests
It wastes a considerable amount of resources on your local device
It doesn't handle the case where there are multiple services/servers running on your port on different devices
What if the local network isn't 192.168.1.x ?
You should investigate other options for identifying your servers address such as Bonjour or even a simple application preference to set the server address