main.m

/*
    File:       main.m
 
    Contains:   A simple test program for the SRVResolver class.
 
    Written by: DTS
 
    Copyright:  Copyright (c) 2010-2012 Apple Inc. All Rights Reserved.
 
    Disclaimer: IMPORTANT: This Apple software is supplied to you by Apple Inc.
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                APPLE MAKES NO WARRANTIES, EXPRESS OR IMPLIED, INCLUDING
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                IN NO EVENT SHALL APPLE BE LIABLE FOR ANY SPECIAL, INDIRECT,
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*/
 
#include "SRVResolver.h"
 
@interface Main : NSObject <SRVResolverDelegate>
 
- (BOOL)runWithSRVName:(NSString *)srvName;
 
@end
 
@interface Main ()
 
@property (nonatomic, strong, readwrite) SRVResolver *  resolver;
 
@end
 
@implementation Main
 
- (void)dealloc
{
    [self->_resolver stop];
}
 
@synthesize resolver = _resolver;
 
- (BOOL)runWithSRVName:(NSString *)srvName
    // The Objective-C 'main' for this program.  It creates a SRVResolver object 
    // and runs the runloop, allowing it to issue the query and receive the reply.
{
    assert(self.resolver == nil);
    
    self.resolver = [[SRVResolver alloc] initWithSRVName:srvName];
    assert(self.resolver != nil);
 
    if (NO) {
        self.resolver.delegate = self;
    }
    [self.resolver start];
    
    while ( ! self.resolver.isFinished ) {
        [[NSRunLoop currentRunLoop] runMode:NSDefaultRunLoopMode beforeDate:[NSDate distantFuture]];
    }
 
    if (self.resolver.error == nil) {
        NSLog(@"Priority   Weight Target:Port");
        NSLog(@"--------   ------ -----------");
        for (NSDictionary * result in self.resolver.results) {
            NSLog(
                @"%8d %8d %@:%d", 
                [[result objectForKey:kSRVResolverPriority] intValue],
                [[result objectForKey:kSRVResolverWeight  ] intValue],
                [result objectForKey:kSRVResolverTarget],
                [[result objectForKey:kSRVResolverPort    ] intValue]
            );
        }
    } else {
        NSLog(@"error = %@", self.resolver.error);
    }
 
    return (self.resolver.error == nil);
}
 
- (void)srvResolver:(SRVResolver *)resolver didReceiveResult:(NSDictionary *)result
    // An SRVResolver delegate callback.  See the "SRVResolver.h" for details.
{
    assert(resolver == self.resolver);
    #pragma unused(resolver)
    assert(result != nil);
    NSLog(@"didReceiveResult %@", result);
}
 
- (void)srvResolver:(SRVResolver *)resolver didStopWithError:(NSError *)error
    // An SRVResolver delegate callback.  See the "SRVResolver.h" for details.
{
    assert(resolver == self.resolver);
    #pragma unused(resolver)
    NSLog(@"didStopWithError %@", error);
}
 
@end
 
// A good address to test this with is:
//
// _xmpp-server._tcp.gmail.com
//
// See the read me for a specific example.
 
int main(int argc, char* argv[])
{
    #pragma unused(argc)
    #pragma unused(argv)
    int                 retVal;
    BOOL                success;
    Main *              mainObj;
 
    @autoreleasepool {
        retVal = EXIT_FAILURE;
        if (argc == 2) {
            mainObj = [[Main alloc] init];
            assert(mainObj != nil);
            
            success = [mainObj runWithSRVName:[NSString stringWithUTF8String:argv[1]]];
            if (success) {
                retVal = EXIT_SUCCESS;
            }
        } else {
            fprintf(stderr, "usage: %s name\n", getprogname());
        }
    }    
    
    return retVal;
}