IRCConnection: Make the socket class configurable

This makes using TLS possible.

FossilOrigin-Name: 38de3de8ed2056e1116492cc44443d814ff115d85b81ba5c9014d0bf925a0f83

src/IRCConnection.h

@@ -28,6 +28,8 @@
 
 @protocol IRCConnectionDelegate <OFObject>
 @optional
+- (void)connection: (IRCConnection*)connection
+   didCreateSocket: (OF_KINDOF(OFTCPSocket)*)socket;
 - (void)connection: (IRCConnection*)connection
     didReceiveLine: (OFString*)line;
 - (void)connection: (IRCConnection*)connection
@@ -72,7 +74,8 @@
 
 @interface IRCConnection: OFObject
 {
-	OFTCPSocket *_socket;
+	Class _socketClass;
+	OF_KINDOF(OFTCPSocket) *_socket;
 	OFString *_server;
 	uint16_t _port;
 	OFString *_nickname, *_username, *_realname;
@@ -80,6 +83,7 @@
 	id <IRCConnectionDelegate> _delegate;
 }
 
+@property (assign) Class socketClass;
 @property (copy) OFString *server;
 @property (assign) uint16_t port;
 @property (copy) OFString *nickname, *username, *realname;

src/IRCConnection.m

@@ -38,6 +38,7 @@
 #import "IRCUser.h"
 
 @implementation IRCConnection
+@synthesize socketClass = _socketClass;
 @synthesize server = _server, port = _port;
 @synthesize nickname = _nickname, username = _username, realname = _realname;
 @synthesize delegate = _delegate, socket = _socket;
@@ -52,6 +53,7 @@
 	self = [super init];
 
 	@try {
+		_socketClass = [OFTCPSocket class];
 		_channels = [[OFMutableDictionary alloc] init];
 		_port = 6667;
 	} @catch (id e) {
@@ -81,7 +83,12 @@
 	if (_socket != nil)
 		@throw [OFAlreadyConnectedException exception];
 
-	_socket = [[OFTCPSocket alloc] init];
+	_socket = [[_socketClass alloc] init];
+	if ([_delegate respondsToSelector:
+	    @selector(connection:didCreateSocket:)])
+		[_delegate connection: self
+		      didCreateSocket: _socket];
+
 	[_socket connectToHost: _server
 			  port: _port];