/*

File: main.m

Abstract: Main entry point, showing a simple usage of PortMapper class

Version: 1.0

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*/

#import "PortMapper.h"

/** A trivial class that just demonstrates how to create a PortMapper and listen for changes. */

@interface PortMapperTest : NSObject

{

    PortMapper *_mapper;

}

@end

@implementation PortMapperTest

- (id) init

{

    self = [super init];

    if( self ) {

        // Create PortMapper. To experiment, you could turn on Web Sharing, then change 

        // this port number to 80 -- that will make your computer's local Apache web

        // server reachable from the outside world while this program is running.

        _mapper = [[PortMapper alloc] initWithPort: 7];

        // Optionally, request a public port number.

        // The NAT is free to ignore this and return a random number instead.

        _mapper.desiredPublicPort = 22222;

        // Now open the mapping (asynchronously):

        if( [_mapper open] ) {

            NSLog(@"Opening port mapping...");

            // Now listen for notifications to find out when the mapping opens, fails, or changes:

            [[NSNotificationCenter defaultCenter] addObserver: self 

                                                     selector: @selector(portMappingChanged:) 

                                                         name: PortMapperChangedNotification 

                                                       object: _mapper];

        } else {

            // PortMapper failed -- this is unlikely, but be graceful:

            NSLog(@"!! Error: PortMapper wouldn't start: %i",_mapper.error);

            [self release];

            return nil;

        }

    }

    return self;

}

- (void) portMappingChanged: (NSNotification*)n

{

    // This is where we get notified that the mapping was created, or that no mapping exists,

    // or that mapping failed.

    if( _mapper.error )

        NSLog(@"!! PortMapper error %i", _mapper.error);

    else {

        NSString *message = @"";

        if( !_mapper.isMapped )

            message = @" (no address translation!)";

        NSLog(@"** Public address:port is %@:%hu%@", _mapper.publicAddress,_mapper.publicPort,message);

    }

}

- (void) dealloc

{

    [_mapper close];

    [_mapper release];

    [super dealloc];

}

@end

int main (int argc, const char * argv[]) 

{

    NSAutoreleasePool * pool = [[NSAutoreleasePool alloc] init];

    // Here's how to simply obtain your local and public address(es):

    NSString *addrStr = [PortMapper localAddress];

    NSLog(@"** Local address is %@", addrStr);

    if( [PortMapper localAddressIsPrivate] )

        NSLog(@"** ...that's a private address");

    addrStr = [PortMapper findPublicAddress];

    NSLog(@"** Public address is %@", addrStr);

    // Start up the test class to create a mapping:

    PortMapperTest *test = [[PortMapperTest alloc] init];

    // Now let the runloop run, to give the mapping time to be set up:

    NSLog(@"Running the runloop...");

    [[NSRunLoop currentRunLoop] run];

    [test release];

    [pool release];

    return 0;

}