AsyncTCP
About
A tiny library easing TCP connections handling. Provides a set of classes for the user to connect to a remote server as a client and is able to host a server on its own.
Non-blocking and asynchronous, uses delegation to notify about incoming data packets, connection state change, etc. Gives you a choice which dispatch queue you'd like to choose to receive the notifications.
All components are loosly coupled, as a result the code is testable and tested.
Examples
Setting up a server
First of all define server's boot parameters
struct ServerConfiguration configuration;
// Port is a number in range from 0 to 65535
configuration.port = 47851;
// Chunk size is a buffer size
configuration.chunkSize = 36;
// Time of inactivity after which client's connection is going to be closed
configuration.connectionTimeout = 5;
// Number of clients allowed to connect
configuration.maximalConnectionsCount = 1;
// Interval between server's main loop evaluations. Adjust depending on your network speed and device's resources utilization
configuration.eventLoopMicrosecondsDelay = 20;
// Number of errors after which the connection will be closed
configuration.errorsBeforeConnectionClosing = 3;Create a server with this specific configuration. By default all notification will be passed to the main dispatch queue.
NSObject<ServerHandle> * asyncServer = [[Server alloc] initWithConfiguratoin:configuration];Notifications will be send only if the delegate of the server is set. Otherwise connections won't be accepted and data received. To receive notifications implement ServerDelegate protocol.
ServerDelegate
Interface
@interface ServerHandler: NSObject<ServerDelegate>
@endImplementation
@implementation ServerHandler
-(void)newClientHasConnected: (Connection*) connection {
// Handle the connection here somehow
}
-(void)clientHasDisconnected: (Connection*) connection {
// Ivoked when a client disconnected or the connection hung
}
@endOne additional step to make is to implement ConnectionDelegate protocol. It is an interface which lets you receive a notification when data is received or connection's state updated.
ConnectionDelegate
Interface
@interface ConnectionHandler: NSObject<ConnectionDelegate>
@endImplementation
@implementation ConnectionHandler
-(void)connection:(NSObject<ConnectionHandle> *)connection chunkHasArrived:(NSData *)data {
// Parse the data or pass it through
}
@end
