Objective-C

Connect a TCP or TLS Socket

Demonstrates Socket.Connect, which establishes a TCP connection to a host and port. Setting the TLS argument to _TRUE_ performs a TLS handshake after the TCP connection succeeds.

Background. The hostname may be a DNS name or a numeric IPv4/IPv6 address. The final argument bounds how long the connect attempt waits before failing. On failure, ConnectFailReason and LastErrorText provide detail.

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Objective-C

#import <CkoSocket.h>

BOOL success = NO;

CkoSocket *socket = [[CkoSocket alloc] init];

//  Connect to the server using TLS.  The 3rd argument enables the TLS handshake after the TCP
//  connection succeeds; the 4th is the maximum time to wait, in milliseconds.
BOOL bTls = YES;
int maxWaitMs = 5000;
success = [socket Connect: @"example.com" port: [NSNumber numberWithInt: 5000] ssl: bTls maxWaitMs: [NSNumber numberWithInt: maxWaitMs]];
if (success == NO) {
    NSLog(@"%@",socket.LastErrorText);
    return;
}

//  StringCharset controls the character encoding used when sending and receiving text.
socket.StringCharset = @"utf-8";

//  The socket is now connected and ready to send and receive data using whatever protocol the
//  application implements.
NSLog(@"%@%d",@"Connected: ",socket.IsConnected);

//  Close the connection when finished.  The argument is the maximum time to wait for a clean
//  shutdown, in milliseconds.
success = [socket Close: [NSNumber numberWithInt: 1000]];
if (success == NO) {
    NSLog(@"%@",socket.LastErrorText);
    return;
}